CN210450660U

CN210450660U - Expansion pipe fixing base

Info

Publication number: CN210450660U
Application number: CN201921394764.8U
Authority: CN
Inventors: 韩得鹏; 张飞; 桑伟勇; 刘江锋
Original assignee: Aux Air Conditioning Co Ltd; Ningbo Aux Electric Co Ltd
Current assignee: Aux Air Conditioning Co Ltd; Ningbo Aux Electric Co Ltd
Priority date: 2019-08-26
Filing date: 2019-08-26
Publication date: 2020-05-05
Anticipated expiration: 2029-08-26

Abstract

The utility model provides an expand tube unable adjustment base relates to expand tube technical field, this expand tube unable adjustment base includes base body, climbing mechanism, the pressfitting supports holding, interior jack catch and outer jack catch, interior jack catch all is connected with base body with outer jack catch, outer jack catch has the card that supplies the tube head to stretch into and holds the passageway, interior jack catch part stretches into the card and holds in the passageway, and be formed with the card that is used for holding the tube head between outer jack catch and the interior jack catch and hold the ring chamber, the climbing mechanism activity sets up on base body, the pressfitting supports holding and is connected with climbing mechanism, climbing mechanism is used for driving the pressfitting and supports holding in the piece promotes jack catch and/or outer jack catch, so that outer jack catch and interior jack catch relatively draw close up and hold on the tube head. Compared with the prior art, the utility model provides an expand tube unable adjustment base, fixed effectual can guarantee that the tube head is fixed and is held in the card and hold the ring chamber, and it is good to have guaranteed the uniformity of the first length size that exposes of copper pipe, and the copper pipe microcontraction has also reduced the consumption of copper tubular product simultaneously.

Description

Expansion pipe fixing base

Technical Field

The utility model relates to an expand tube technical field particularly, relates to an expand tube unable adjustment base.

Background

In the technical field of heat exchange of air conditioners, refrigerators and the like, in order to realize the installation of a heat exchange tube, the heat exchange tube is generally required to be expanded and flared, and the heat exchange tube is required to be fixed when the expansion or flaring is carried out.

In the prior art, manual tube expansion or conventional tube expansion with contraction is usually adopted, the heat exchange tube is usually a copper tube, the contraction rate of the copper tube is poor, and the fixing effect of the existing tube expansion base is poor, so that the consistency of the length size of the exposed end of the copper tube is poor, the consumption of the copper tube is high, and the production quality control and the cost control are not facilitated.

SUMMERY OF THE UTILITY MODEL

The utility model provides a problem how improve the fixed effect of expand tube base, guarantee that the uniformity of copper pipe outcrop length size is good to reduce the consumption of copper tubular product.

In order to solve the problems, the utility model discloses a solve through following technical scheme.

An expansion pipe fixing base comprises a base body, a jacking mechanism, a press fit abutting piece, an inner clamping jaw and an outer clamping jaw, wherein the inner clamping jaw and the outer clamping jaw are both connected with the base body, the outer clamping jaw is provided with a clamping passage for a pipe head to extend into, the inner clamping jaw partially extends into the clamping passage, a clamping ring cavity for clamping the pipe head is formed between the outer clamping jaw and the inner clamping jaw, the jacking mechanism is movably arranged on the base body, the press fit abutting piece is connected with the jacking mechanism, and the jacking mechanism is used for driving the press fit abutting piece to push the inner clamping jaw and/or the outer clamping jaw so that the outer clamping jaw and the inner clamping jaw are relatively close to each other and clamped on the pipe head.

The utility model provides a pair of expand tube unable adjustment base, through jack catch and outer jack catch in setting up on base body, and be formed with the card that is used for holding the copper pipe head between interior jack catch and the outer jack catch and hold the ring chamber, under climbing mechanism's drive, jack catch and/or outer jack catch in the pressfitting supports holding the piece promotion, make interior jack catch and outer jack catch consider relatively, the ring chamber is held to the constricting card, and make interior jack catch and outer jack catch hold on the pipe head, thereby realize the fixed to the copper pipe head, the power of grabbing to the copper pipe has been guaranteed in the setting of inside and outside jack catch, and can prevent that the copper pipe from causing excessive deformation. Compared with the prior art, the utility model provides an expand tube unable adjustment base supports holding piece promotion in jack catch and/or outer jack catch card through the pressfitting and holds on the tube head, and is fixed effectual, can guarantee that the tube head is fixed in the card and hold the ring chamber, when carrying out operations such as expand tube, the copper pipe contracts a little, and then has guaranteed that the uniformity of the outcrop length dimension of copper pipe is good, and the copper pipe contracts a little simultaneously and has also reduced the consumption of copper tubular product.

Furthermore, the pressing abutting piece comprises an outer shrinkage sleeve, the outer shrinkage sleeve is connected with a jacking mechanism, and the jacking mechanism is used for driving the outer shrinkage sleeve to push the outer clamping jaws so as to enable the outer clamping jaws to be close to the inner clamping jaws.

The utility model provides a pair of expand tube unable adjustment base promotes outer jack catch through outer shrink sleeve for outer jack catch draws close towards interior jack catch, thereby can through outer jack catch and interior jack catch card on the tube head, guaranteed the card and hold the effect, and outer shrink sleeve is connected with climbing mechanism, thereby can improve the controllability through the climbing mechanism drive.

Furthermore, the outer shrink sleeve comprises a supporting convex ring and a connecting piece, the supporting convex ring is arranged on the connecting piece and annularly arranged on the outer side of the outer clamping jaw, and the connecting piece is connected with the jacking mechanism.

The utility model provides a pair of expand tube unable adjustment base, through supporting holding the outer jack catch of bulge loop promotion, the connecting piece realize with climbing mechanism's being connected, play the transmission effect simultaneously, support and hold the bulge loop can be evenly to the outer jack catch application of force, guarantee outer jack catch can all the direction motion unanimous and to the even application of force of pipe head, can avoid appearing the inclined to one side phenomenon of card.

Further, outer gripper includes a plurality of fixture blocks and jack catch fixing base, and jack catch fixing base and this body coupling of base, a plurality of fixture block activities set up on jack catch fixing base and enclose to establish and form and hold the passageway, and outer shrink sleeve is used for promoting a plurality of fixture blocks to make a plurality of fixture blocks draw close towards interior gripper.

The utility model provides a pair of expand tube unable adjustment base realizes the joint of tube head through a plurality of fixture blocks to promote through outer shrink sleeve, make the tube head can be many ways atress, improve the card and hold the effect.

Furthermore, a plurality of pin shafts are arranged on the claw fixing seat, and the clamping block is rotatably connected to the claw fixing seat through the pin shafts.

The utility model provides an expand tube unable adjustment base, fixture block rotate to be connected on the jack catch fixing base, and convenient outer shrink sleeve promotes the fixture block and rotates and the card is held on the tube head, can be better with applying holding power on the tube head, avoids influencing the promotion effect because of frictional force is too big between outer shrink sleeve and the fixture block. In addition, when the clamping block is clamped on the tube head, friction force exists between the clamping block and the outer surface of the tube head, the copper tube is stressed to contract when expanding the tube and generates contraction force opposite to the friction force, so that the clamping block tends to rotate towards the tube head and inwards, component force is further applied to the copper tube, the purpose of self-locking can be achieved, the copper tube is prevented from sliding and losing efficacy in the tube expanding process, and the fixing effect is further guaranteed.

Furthermore, each clamping block comprises a clamping part and a shifting part which are connected with each other, one side of the shifting part, which is close to the clamping part, is provided with a shaft hole for accommodating the pin shaft, and the clamping part is bent towards the direction far away from the clamping channel relative to the shifting part.

The clamping part of the expansion tube fixing base provided by the utility model is bent outwards relatively, so that the clamping part can be pushed when the outer shrinkage sleeve moves towards the clamping part, the clamping part can be pressed on the tube head, and the stirring part moves reversely; when the pipe head moves towards the shifting part, the shifting part can be pushed, and meanwhile, the clamping part moves reversely and is separated from the pipe head, so that the clamping and the releasing of the clamping of the pipe head are facilitated.

Further, a plurality of first clamping teeth are arranged on the inner side surface of each clamping block close to the clamping channel.

The utility model provides an expand tube unable adjustment base sets up first latch at the inboard surface of fixture block, can increase the pressure to the tube head surface to improve the frictional force between tube head and the fixture block, improve the card and hold the effect.

Furthermore, the pressing abutting piece comprises an inner expanding connecting rod and an expanding end head, the expanding end head is connected to the jacking mechanism through the inner expanding connecting rod, the inner expanding connecting rod penetrates through the inner clamping jaws, and the expanding end head is used for pushing the inner clamping jaws under the driving of the jacking mechanism so that the inner clamping jaws are close to the outer clamping jaws.

The utility model provides an expand tube unable adjustment base promotes interior jack catch through the hole enlargement end to realized the technological effect that interior jack catch and outer jack catch drawn close relatively, the jack catch breaks away from or promotes in under the drive of expansion connecting rod including the hole enlargement end simultaneously, the controllability is good.

Further, the diameter of the expanding head gradually increases towards the direction away from the jacking mechanism.

The utility model provides a pair of expand tube unable adjustment base, the diameter of hole enlargement end is progressively increased progressively towards the direction of keeping away from climbing mechanism to when being close to climbing mechanism motion under the drive of expansion connecting rod including the hole enlargement end, the jack catch in can progressively expanding, thereby make interior jack catch can draw close along radial towards outer jack catch, realize the expansion of interior jack catch, improve the card of tube head and hold fixed effect.

Furthermore, the inner clamping jaw comprises a clamping jaw supporting seat and a clamping jaw cylinder, one end of the clamping jaw cylinder is connected with the clamping jaw supporting seat, the other end of the clamping jaw cylinder extends into the clamping channel, the inner expansion connecting rod sequentially penetrates through the supporting seat and the clamping jaw cylinder, one end of the clamping jaw cylinder, which extends into the clamping channel, is provided with a plurality of clamping sheets, the clamping sheets are arranged around the inner expansion connecting rod, and the expanding end head is used for being pressed on the inner sides of the clamping sheets.

The utility model provides a pair of expand tube unable adjustment base, through setting up a plurality of clamping pieces, and a plurality of clamping pieces enclose to establish including the expansion connecting rod outside, including under the drive of expansion connecting rod, hole enlargement end pressfitting is in the inboard of a plurality of clamping pieces to progressively outwards expand a plurality of clamping pieces and draw close towards outer jack catch, thereby the width in ring chamber is held to the constricting card, realizes the card of holding the tube head, and improved the card and held fixed effect.

Furthermore, a plurality of second latch teeth are formed on the outer side surface of each clamping piece.

The utility model provides an expand tube unable adjustment base through setting up the second latch for the chucking piece can the pressfitting at the inboard surface of tube head, and improves and supports the effort, and then has promoted the frictional force between chucking piece and the tube head, has promoted the card and has held fixed effect.

Further, climbing mechanism includes jacking connecting rod, elastic component and slip fixing base, and the slip fixing base slides and sets up and support the piece with the pressfitting in the base body and be connected, and the one end and the slip fixing base of jacking connecting rod are connected, and the other end of jacking connecting rod stretches out the base body, and the elastic component is connected with base body and jacking connecting rod respectively for drive pressfitting supports and holds the piece.

The utility model provides a pair of expand tube unable adjustment base drives the pressfitting through the elastic component and supports and hold piece promotion interior jack catch and/or outer jack catch to realized that interior jack catch and outer jack catch draw close each other and the card is held on the tube head, pack into at the tube head and hold the back in the ring chamber, interior jack catch and outer jack catch can receive the drive under the effect of elastic component and draw close each other, thereby avoided additionally applying external force and drive the pressfitting and support and hold a motion, simplified the structure.

Furthermore, the elastic part is a spring, the spring is sleeved on the jacking connecting rod, a limiting sleeve is arranged at one end, extending out of the base body, of the jacking connecting rod, one end of the spring is connected with the base body, and the other end of the spring is connected with the limiting sleeve.

The utility model provides a pair of expand tube unable adjustment base through establishing the spring housing on the jacking connecting rod, spring and stop collar use coordinately simultaneously, can be so that the elasticity of spring along the axial direction of jacking connecting rod, avoid appearing non-axial force and influence the motion of slip fixing base, and then influence the pressfitting and support the motion of holding.

Drawings

Fig. 1 is a schematic view of an internal structure of an expansion pipe fixing base according to a first embodiment of the present invention;

fig. 2 is a schematic external structural view of an expansion pipe fixing base according to a first embodiment of the present invention;

FIG. 3 is an enlarged view of a portion of III of FIG. 1;

fig. 4 is a schematic partial structural view of an expanding pipe fixing base according to a first embodiment of the present invention;

FIG. 5 is a schematic structural view of the outer shrink sleeve of FIG. 4;

FIG. 6 is a schematic view of the inner expansion link of FIG. 4;

fig. 7 is a schematic view of a connection structure of the outer jaws in fig. 1;

fig. 8 is a schematic view of the overall structure of the outer jaws of fig. 7;

FIG. 9 is a schematic view of the disassembled structure of the outer jaws of FIG. 7;

FIG. 10 is a schematic view of the connection structure of the inner jaw of FIG. 1;

FIG. 11 is a schematic view of the overall structure of the inner jaw of FIG. 10;

FIG. 12 is a schematic view of the jaw cylinder of FIG. 11;

FIG. 13 is a schematic view of a connection structure of the jacking mechanism of FIG. 1;

fig. 14 is a schematic structural view of an expanding pipe fixing base according to a second embodiment of the present invention;

FIG. 15 is an enlarged partial schematic view of XV in FIG. 14;

fig. 16 is a schematic structural view of an expanding tube fixing base according to a third embodiment of the present invention;

fig. 17 is a schematic view of a partial structure of an expanding pipe fixing base according to a third embodiment of the present invention.

Description of reference numerals:

100-expanding a tube fixing base; 110-a base body; 111-a chucking channel; 113-a retaining ring cavity; 130-a jacking mechanism; 131-a jacking connecting rod; 133-an elastic member; 135-sliding fixed seat; 137-a limit sleeve; 150-pressing the abutting piece; 151-outer shrink sleeve; 1511-holding the convex ring; 1513-connecting member; 153-inner expansion link; 155-expanding end head; 1551-forming a frustum; 170-inner jaw; 171-jaw support seat; 173-jaw cylinder; 175-a clamping sheet; 177-a second latch; 179-pawl column; 190-outer claws; 191-a fixture block; 1911-a catch; 1913-toggle part; 193-jaw holder; 1931-jaw connection; 1933-a base connection; 195-a pin shaft; 197-first latch.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, embodiments accompanied with figures are described in detail below.

First embodiment

With reference to fig. 1 to 3, this embodiment provides an expand tube unable adjustment base 100, and it is used for fixing the tube head of copper pipe, makes things convenient for the copper pipe to carry out operations such as expand tube, and it is fixed effectual, when carrying out operations such as expand tube, the copper pipe contracts a little, and then has guaranteed that the uniformity of the outcrop length dimension of copper pipe is good, and the copper pipe contracts a little simultaneously and has also reduced the consumption of copper tubular product.

The present embodiment provides an expanding tube fixing base 100, which includes a base body 110, a jacking mechanism 130, a press-fit abutting member 150, an inner jaw 170 and an outer jaw 190, wherein the inner jaw 170 and the outer jaw 190 are both connected to the base body 110, the outer jaw 190 has a clamping passage 111 into which a tube head extends, a part of the inner jaw 170 extends into the clamping passage 111, a clamping ring cavity 113 for clamping the tube head is formed between the outer jaw 190 and the inner jaw 170, the jacking mechanism 130 is movably disposed on the base body 110, the press-fit abutting member 150 is connected to the jacking mechanism 130, and the jacking mechanism 130 is configured to drive the press-fit abutting member 150 to push the inner jaw 170 and/or the outer jaw 190, so that the outer jaw 190 and the inner jaw 170 are relatively close to each other and clamped to the tube head.

It should be noted that, in this embodiment, the base body 110 is identical to the existing expansion pipe base in shape, and can be directly used, and the universality is good. In this embodiment, the pressing abutting piece 150, the inner jaw 170 and the outer jaw 190 are all accommodated in the base body 110, and the jacking mechanism 130 is partially accommodated in the base body 110, and the specific structure of the base body 110 is not described herein, and reference may be made to the shape and structure of the existing expand tube base.

In this embodiment, the inner jaw 170 and the outer jaw 190 are disposed on the base body 110, and a clamping ring cavity 113 for clamping the copper tube head is formed between the inner jaw 170 and the outer jaw 190, and under the driving of the jacking mechanism 130, the pressing abutting member 150 pushes the inner jaw 170 and/or the outer jaw 190, so that the inner jaw 170 and the outer jaw 190 are considered relatively, the clamping ring cavity 113 is narrowed, and the inner jaw 170 and the outer jaw 190 are clamped on the tube head, thereby fixing the copper tube head, and ensuring that the tube head is fixed in the clamping ring cavity 113.

It should be noted that in the present embodiment, two inner claws 170, two outer claws 190 and two press-fit abutting members 150 are formed, and form two sets of holding structures, so that two holding channels 111 and two holding ring cavities 113 can be formed on the base body 110, and two ends of two straight copper tubes or two ends of one U-shaped tube can be fixed at the same time.

Referring to fig. 4 to 6, the press-fit abutting member 150 includes an outer contracting sleeve 151, an inner expanding connecting rod 153, and an expanding end 155 disposed at an end of the inner expanding connecting rod 153, the outer contracting sleeve 151 is connected to the jacking mechanism 130, and the jacking mechanism 130 is configured to drive the outer contracting sleeve 151 to push the outer jaws 190, so that the outer jaws 190 are drawn toward the inner jaws 170. The expanding tip 155 is connected to the jacking mechanism 130 through an inner expanding link 153, the inner expanding link 153 passes through the inner jaw 170 and extends into the catching channel 111, and the expanding tip 155 is used for pushing the inner jaw 170 under the driving of the jacking mechanism 130 so that the inner jaw 170 is drawn toward the outer jaw 190.

It should be noted that in this embodiment, the outer contracting sleeve 151 and the inner expanding connecting rod 153 both move in the vertical direction under the driving of the jacking mechanism 130, the outer jaws 190 are pushed by the outer contracting sleeve 151, so that the outer jaws 190 approach to the inner jaws 170, and the inner jaws 170 are pushed by the expanding end 155, so that the inner jaws 170 approach to the outer jaws 190, and can be clamped on the pipe head through the outer jaws 190 and the inner jaws 170, thereby ensuring the clamping effect, and the outer contracting sleeve 151 and the inner expanding connecting rod 153 are both connected with the jacking mechanism 130, so that the driving by the jacking mechanism 130 can be performed, and the controllability is improved.

The outer shrink sleeve 151 comprises a supporting convex ring 1511 and a connecting piece 1513, the supporting convex ring 1511 is arranged on the connecting piece 1513 and is annularly arranged on the outer side of the outer jaw 190, and the connecting piece 1513 is connected with the jacking mechanism 130. The outer clamping jaw 190 is pushed by the abutting convex ring 1511, the connecting piece 1513 is connected with the jacking mechanism 130, a transmission effect is achieved, the abutting convex ring 1511 can uniformly apply force to the outer clamping jaw 190, the outer clamping jaw 190 can move uniformly in all directions, force can be uniformly applied to a pipe head, and the phenomenon of clamping deviation can be avoided.

In this embodiment, the lower portion of the connecting member 1513 is partially cylindrical, the upper portion is completely cylindrical, the supporting protrusion ring 1511 is annularly disposed on the inner side of the upper portion cylindrical, and covers the outer jaw 190, so as to press the outer jaw 190 from the circumferential direction, the lower portion of the connecting member 1513 is further provided with a plurality of connecting holes, and the lower portion of the connecting member 1513 is connected to the jacking mechanism 130 through screws. The lower portion of the connecting piece 1513 is partially cylindrical, so that the connecting piece 1513 can give way to the inner jaw 170, and the connecting piece 1513 is prevented from being interfered by the inner jaw 170 in the process of moving in the vertical direction.

In this embodiment, the end of the inner expanding link 153 remote from the expanding tip 155 is detachably connected to the jacking mechanism 130, specifically, the end can be connected to the jacking mechanism 130 by interference fit or screw connection, and the expanding tip 155 and the inner expanding link 153 are integrally formed and coaxially disposed.

In this embodiment, the diameter of the enlarged head 155 increases in a direction away from the jacking mechanism 130. Specifically, the expanding tip 155 is in the shape of an inverted circular truncated cone, so that the expanding tip 155 has an outer circular surface with an increasing diameter, and an included angle between a generatrix of the circular truncated cone and an axis of the circular truncated cone is 4.5-8.5 degrees, and preferably 6.5 degrees. When the expanding tip 155 moves downwards towards the inner jaw 170, the inner jaw 170 can be gradually expanded, so that the inner jaw 170 can be drawn close to the outer jaw 190 along the radial direction, the expansion of the inner jaw 170 is realized, and the clamping and fixing effect of the pipe head is improved.

In this embodiment, the top end of the expanding tip 155 is provided with a forming frustum 1551, that is, the top surface of the expanding tip 155 away from the inner expanding connecting rod 153 is further provided with a forming frustum 1551, the expanding tip 155 and the inner expanding connecting rod 153 are integrally formed, and the expanding tip 155 and the inner expanding connecting rod 153 can be conveniently manufactured by providing the forming frustum 1551.

Referring to fig. 7 to 9, the outer jaw 190 includes a plurality of locking blocks 191 and a jaw fixing seat 193, the jaw fixing seat 193 is connected to the base body 110, the locking blocks 191 are movably disposed on the jaw fixing seat 193 and surround to form a locking channel 111, and the outer retractable sleeve 151 is configured to push the locking blocks 191 so that the locking blocks 191 are drawn toward the inner jaw 170. The clamping connection of the tube head is realized through the clamping blocks 191, and the tube head is pushed by the outer shrinkage sleeve 151, so that the tube head can be stressed in multiple directions, and the clamping effect is improved.

In this embodiment, the jaw fixing base 193 is provided with a plurality of pins 195, and the latch 191 is rotatably connected to the jaw fixing base 193 through the pins 195. Specifically, the jaw fixing seat 193 is provided with three clamping blocks 191 and three pin shafts 195, and the three clamping blocks 191 are uniformly distributed and are rotatably connected to the jaw fixing seat 193 through the three pin shafts 195. Of course, the number of the latch 191 is not limited to three, and may be four or five, and the like, which are not described herein.

Jaw fixing base 193 includes jaw connecting portion 1931 and base connecting portion 1933, and base connecting portion 1933 be discoid and with base body 110 fixed connection, and jaw connecting portion 1931 sets up in the below of base connecting portion 1933, and three fixture block 191 rotates to be connected on jaw connecting portion 1931. The outer retractable sleeve 151 can push the clamping block 191 to rotate and clamp the tube head conveniently, the abutting force can be better applied to the tube head, and the pushing effect is prevented from being influenced by overlarge friction force between the outer retractable sleeve 151 and the clamping block 191.

In addition, when the clamping block 191 is clamped on the tube head, friction force exists between the clamping block 191 and the outer surface of the tube head, the copper tube is stressed to contract when expanding the tube and generates contraction force opposite to the friction force, and then the clamping block 191 tends to rotate towards the tube head and inwards, component force is further applied to the copper tube, so that the self-locking purpose can be achieved, the sliding failure of the copper tube in the tube expanding process is prevented, and the fixing effect is further ensured.

Each latch 191 includes a holding portion 1911 and a toggle portion 1913 connected to each other, a shaft hole for accommodating the pin 195 is formed on one side of the toggle portion 1913 close to the holding portion 1911, and the holding portion 1911 is bent in a direction away from the holding channel 111 relative to the toggle portion 1913. The catch 1911 is bent outward relatively, so that the outer shrink sleeve 151 can push the catch 1911 when moving towards the catch 1911, so that the catch 1911 can be pressed on the tube head, and the toggle 1913 moves in the opposite direction; when moving towards the dial 1913, the dial 1913 can be pushed, and meanwhile, the clamping portion 1911 is enabled to move reversely and is separated from the tube head, so that clamping and unclamping of the tube head are facilitated.

In this embodiment, seted up three opening of stepping down on the jack catch connecting portion 1931, the portion 1913 of dialling of three fixture block 191 corresponds and stretches into three opening of stepping down, and when fixture block 191 rotated, the portion 1913 of dialling can rotate in the opening of stepping down to the rotation stroke of jack catch connecting portion 1931 to fixture block 191 has been avoided and has been caused the interference. Specifically, the top end of the dial 1913 is pointed to facilitate rotation of the dial 1913 within the abduction opening.

In this embodiment, the shaft hole of the toggle part 1913 is disposed near the retaining part 1911, so that most of the toggle part 1913 and the retaining part 1911 can rotate in the opposite direction, when the outer shrink sleeve 151 abuts against the toggle part 1913, the toggle part 1913 can be pressed to rotate inwards, and the retaining part 1911 is driven to rotate outwards, so that the retaining ring cavity 113 is expanded, thereby facilitating the loading or unloading of the copper pipe, when the outer shrink sleeve 151 abuts against the retaining part 1911, the retaining part 1911 can be pressed to rotate inwards, and the toggle part 1913 is driven to rotate outwards, thereby narrowing the retaining ring cavity 113, and thereby the copper pipe can be retained.

In the embodiment, a plurality of first latch teeth 197 are disposed on the inner side surface of each latch 191 close to the latching channel 111, so as to increase the pressure on the surface of the pipe head, increase the friction between the pipe head and the latch 191, and improve the latching effect. Specifically, the plurality of first latches 197 are disposed parallel to each other, but the first latches 197 may also be helical.

Referring to fig. 10 to 12, the inner jaw 170 includes a jaw support 171 and a jaw cylinder 173, one end of the jaw cylinder 173 is connected to the jaw support 171, the other end of the jaw cylinder extends into the clamping passage 111, the inner expanding link 153 sequentially passes through the support and the jaw cylinder 173, one end of the jaw cylinder 173 extending into the clamping passage 111 is provided with a plurality of clamping pieces 175, the plurality of clamping pieces 175 surround the inner expanding link 153, and the expanding tip 155 is configured to be pressed on the inner sides of the plurality of clamping pieces 175. By arranging the plurality of clamping pieces 175, and the plurality of clamping pieces 175 are surrounded outside the inner expanding connecting rod 153, under the driving of the inner expanding connecting rod 153, the expanding end 155 is pressed on the inner sides of the plurality of clamping pieces 175, and gradually expands the plurality of clamping pieces 175 outwards and draws the clamping pieces together towards the outer clamping jaws 190, so that the width of the clamping ring cavity 113 is narrowed, the clamping of the tube head is realized, and the clamping and fixing effects are improved.

In this embodiment, the bottom of the jaw fixing cylinder is in interference fit with the jaw support 171 and remains relatively fixed with the jaw support 171, and a screw hole is formed in the middle of the jaw support 171, so that the jaw fixing seat 193 can remain relatively fixed with the base body 110 through bolting.

In this embodiment, the outer surface of each of the clamping pieces 175 is provided with a plurality of second clamping teeth 177. Through setting up second latch 177 for the card holds piece 175 can the pressfitting at the inboard surface of tube head, and improves and supports the effort, and then has promoted the frictional force between card holds piece 175 and the tube head, has promoted the card and has held fixed effect.

Referring to fig. 13, the jacking mechanism 130 includes a jacking link 131, an elastic member 133 and a sliding fixing seat 135, the sliding fixing seat 135 is slidably disposed in the base body 110 and connected to the pressing abutting member 150, one end of the jacking link 131 is connected to the sliding fixing seat 135, the other end of the jacking link 131 extends out of the base body 110, and the elastic member 133 is connected to the base body 110 and the jacking link 131 respectively for driving the pressing abutting member 150. Specifically, the connection part 1513 of the outer shrinkage sleeve 151 is connected to the sliding fixing seat 135, the inner expansion link 153 is connected to the sliding fixing seat 135, and the pressing abutting part 150 is driven by the elastic part 133 to push the inner jaw 170 and/or the outer jaw 190, so that the inner jaw 170 and the outer jaw 190 are drawn together and clamped to the tube head, and after the tube head is installed in the clamping ring cavity 113, the inner jaw 170 and the outer jaw 190 can be driven to draw together by the elastic part 133, thereby preventing an additional external force from being applied to drive the pressing abutting part 150 to move, and simplifying the structure.

In this embodiment, the elastic member 133 is a spring, the spring is sleeved on the jacking connecting rod 131, a limiting sleeve 137 is disposed at one end of the jacking connecting rod 131 extending out of the base body 110, one end of the spring is connected with the base body 110, and the other end of the spring is connected with the limiting sleeve 137. Through sleeving the spring on the jacking connecting rod 131, and simultaneously, the spring is matched with the limiting sleeve 137 for use, so that the elastic force of the spring can be along the axial direction of the jacking connecting rod 131, the influence on the movement of the sliding fixing seat 135 and the movement of the pressing abutting part 150 due to the non-axial force is avoided.

It should be noted that, in this embodiment, the sliding fixing seat 135 is slidably disposed in the base body 110, the connecting member 1513 of the outer shrinkage sleeve 151 is connected by a screw, the sliding fixing seat 135 is further provided with a mounting groove for accommodating the inner expansion link 153, and the inner expansion link 153 is in interference fit in the mounting groove. In other preferred embodiments of the present invention, the screw is inserted into the sliding fixing seat 135 and extends into the mounting groove to abut against the outer peripheral surface of the inner expanding connecting rod 153, so that the inner expanding connecting rod 153 can be limited, and the inner expanding connecting rod 153 and the sliding fixing seat 135 can be kept relatively fixed.

In this embodiment, the jacking connecting rod 131 is connected with an external jacking driving member, and under the driving of the jacking driving member, the jacking connecting rod 131 can move upwards to jack, so as to drive the sliding fixing seat 135, the inner expanding connecting rod 153 and the outer contracting sleeve 151 to move upwards. Of course, the jacking link 131 can be jacked manually, as long as the jacking link 131 can be provided with upward jacking force.

To sum up, the utility model provides an expand tube unable adjustment base 100, its theory of operation as follows: under the action of an external jacking driving element, the jacking connecting rod 131 jacks upwards, the sliding fixing seat 135 drives the inner expanding connecting rod 153 and the outer contraction sleeve 151 upwards to ascend, the spring is compressed, the expanding end 155 is separated from the inner clamping jaw 170, the clamping jaw barrel 173 contracts due to the self contraction force, the outer contraction sleeve 151 applies transverse pressure to the shifting portion 1913 of the clamping blocks 191, the clamping blocks 191 rotate along the pin shaft 195 to be expanded, the clamping ring cavity expands at the moment, and a copper pipe is conveniently placed in. After the copper pipe is put in place, the external jacking driving part is retracted, under the action of the elastic force applied by the strong spring, the jacking connecting rod 131 moves downwards, the sliding fixing seat 135 drives the inner expanding connecting rod 153 and the outer contracting sleeve 151 to descend, the jaw cylinder 173 of the inner jaw 170 is expanded due to the transverse tension applied by the expanding end 155, outward pressure is applied to the inner wall of the copper pipe through the second clamping teeth 177, the outer jaw 190 contracts under the abutting action of the outer contracting sleeve 151, namely, the clamping part 1911 of the clamping block 191 rotates inwards under the abutting action of the outer contracting sleeve 151 and abuts against the outer wall of the copper pipe, and centripetal pressure is applied to the outer wall of the copper pipe, so that the copper pipe is locked. Through the combined force application of the inner clamping jaws 170 and the outer clamping jaws 190, the key is enough tension force during the pipe expanding or other pipe processing operation, and the consistency of the pipe heads is ensured. Compared with the prior art, the expanding tube fixing base 100 provided by the embodiment has the advantages that the inner clamping jaws 170 and the outer clamping jaws 190 are pushed to be clamped on the tube head through the pressing abutting pieces 150, the fixing effect is good, the tube head can be fixed in the clamping ring cavity 113, when the expanding tube and other operations are carried out, the copper tube is slightly contracted, the consistency of the length and the size of the exposed end of the copper tube is good, and meanwhile, the consumption of the copper tube is reduced due to the micro-contraction of the copper tube.

Second embodiment

The present embodiment provides an expansion pipe fixing base 100, the basic structure and principle thereof and the technical effects thereof are the same as those of the first embodiment, and for the sake of brief description, no part of the present embodiment is mentioned, and reference may be made to the corresponding contents of the first embodiment. Compared with the first embodiment, the difference of this embodiment is that the pressing abutting member 150 has the same structure as the first embodiment.

Referring to fig. 14 and 15, in the present embodiment, the tube expansion fixing base 100 includes a base body 110, a jacking mechanism 130, a press-fit abutting member 150, an inner jaw 170, and an outer jaw 190, the inner jaw 170 and the outer jaw 190 are both connected to the base body 110, the outer jaw 190 has a clamping passage 111 into which the tube head extends, the inner jaw 170 partially extends into the clamping passage 111, a clamping ring cavity 113 for clamping the tube head is formed between the outer jaw 190 and the inner jaw 170, the jacking mechanism 130 is movably disposed on the base body 110, the press-fit abutting member 150 is connected to the jacking mechanism 130, and the jacking mechanism 130 is configured to drive the press-fit abutting member 150 to push the inner jaw 170 and/or the outer jaw 190, so that the outer jaw 190 and the inner jaw 170 are relatively close to each other and clamped to the tube head.

The pressing and supporting member 150 includes an outer shrinking sleeve 151, the outer shrinking sleeve 151 is connected to the jacking mechanism 130, and the jacking mechanism 130 is configured to drive the outer shrinking sleeve 151 to push the outer jaws 190, so that the outer jaws 190 are drawn toward the inner jaws 170. In this embodiment, the inner jaw 170 is a fixed structure, and only the outer jaws 190 are pushed by the outer shrink sleeve 151 to be close to or away from the inner jaw 170.

In the present embodiment, the inner pawl 170 includes a pawl column 179 and a pawl support 171, one end of the pawl column 179 is connected to the pawl support 171, the other end thereof extends into the retaining channel 111, and the end of the pawl column 179 away from the pawl support 171 is provided with a plurality of second teeth 177. Specifically, the diameter of the jaw column 179 is slightly less than the inside diameter of the tip, facilitating the loading of the tip while avoiding excessive tip deformation.

It should be noted that, in the embodiment, the inner jaws 170 are fixed, so that only the outer jaws 190 act during the pressing process, and when the tube head is clamped, the end portion of the tube head has a certain amount of shrinkage, so that the jaw columns 179 of the inner jaws 170 can be abutted against the inner wall of the tube head.

The present embodiment provides an expansion pipe fixing base 100, its theory of operation is as follows: under the effect of outside jacking driving piece, jacking connecting rod 131 jack-up upwards, and slip fixing base 135 upwards drives outer shrink sleeve 151 and rises, and the spring is compressed, and outer shrink sleeve 151 applys transverse pressure to the portion 1913 of stirring of fixture block 191 for a plurality of fixture blocks 191 rotate along round pin axle 195 and open, and the clamping ring chamber expansion makes things convenient for the copper pipe to put into this moment. After the copper pipe is put in place, the external jacking driving part is retracted, the jacking connecting rod 131 moves downwards under the action of the elastic force applied by the strong spring, the sliding fixing seat 135 drives the external contraction sleeve 151 to descend, the external clamping claw 190 contracts under the abutting action of the external contraction sleeve 151, namely, the clamping part 1911 of the clamping block 191 rotates inwards under the abutting action of the external contraction sleeve 151 and abuts against the outer wall of the copper pipe, centripetal pressure is applied to the outer wall of the copper pipe, so that the copper pipe is locked, and the structure and the position of the internal clamping claw 170 cannot be changed in the whole process. Through the combined force application of the inner clamping jaws 170 and the outer clamping jaws 190, the key is enough tension force during the pipe expanding or other pipe processing operation, and the consistency of the pipe heads is ensured.

Third embodiment

Referring to fig. 16 and 17, in the embodiment, the tube expansion fixing base 100 includes a base body 110, a jacking mechanism 130, a press-fit abutting member 150, an inner jaw 170, and an outer jaw 190, wherein the inner jaw 170 and the outer jaw 190 are both connected to the base body 110, the outer jaw 190 has a clamping passage 111 into which the tube head extends, the inner jaw 170 partially extends into the clamping passage 111, a clamping ring cavity 113 for clamping the tube head is formed between the outer jaw 190 and the inner jaw 170, the jacking mechanism 130 is movably disposed on the base body 110, the press-fit abutting member 150 is connected to the jacking mechanism 130, and the jacking mechanism 130 is configured to drive the press-fit abutting member 150 to push the inner jaw 170 and/or the outer jaw 190, so that the outer jaw 190 and the inner jaw 170 are relatively close to each other and clamped to the tube head.

The press-fit abutting part 150 comprises an inner expanding connecting rod 153 and an expanding end 155 arranged at the end part of the inner expanding connecting rod 153, the expanding end 155 is connected to the jacking mechanism 130 through the inner expanding connecting rod 153, the inner expanding connecting rod 153 penetrates through the inner claws 170 and extends into the clamping channel 111, and the expanding end 155 is used for pushing the inner claws 170 under the driving of the jacking mechanism 130 so as to enable the inner claws 170 to approach towards the outer claws 190. In this embodiment, the outer jaw 190 is a fixed structure and surrounds the inner jaw 170.

The end of the inner expansion connecting rod 153 far from the diameter-expanding tip 155 is detachably connected with the jacking mechanism 130, specifically, the end can be connected with the jacking mechanism 130 by interference fit or threaded connection, and the diameter-expanding tip 155 and the inner expansion connecting rod 153 are integrally formed and coaxially arranged.

In this embodiment, the outer jaw 190 includes a plurality of latch 191 and a jaw fixing base 193, the jaw fixing base 193 is connected with the base body 110, and the plurality of latch 191 is fixedly disposed on the jaw fixing base 193 and surrounds the clamping channel 111. The clamping connection of the tube head is realized through the clamping blocks 191, so that the tube head can be stressed in multiple directions, and the clamping effect is improved. Specifically, the plurality of clamping blocks 191 are welded on the jaw fixing seat 193 or integrally formed with the jaw fixing seat 193, and the inner diameter of the clamping channel 111 surrounded by the plurality of clamping blocks 191 is slightly larger than the outer diameter of the copper pipe, so that the copper pipe is convenient to mount.

It should be noted that, in the present embodiment, the outer jaws 190 are fixed structures, and the structure of the inner jaws 170 is the same as that of the first embodiment, so that only the inner jaws 170 act during the pressing process, and when the tube head is clamped, the end portion of the tube head has a certain amount of expansion, so that the clamping blocks 191 of the outer jaws 190 can be abutted against the outer wall of the tube head.

The present embodiment provides an expansion pipe fixing base 100, its theory of operation is as follows: under the effect of the external jacking driving piece, the jacking connecting rod 131 jacks upwards, the sliding fixing seat 135 drives the inner expansion connecting rod 153 upwards, the spring is compressed, the expanding end 155 is separated from the inner clamping jaw 170, the clamping jaw barrel 173 contracts due to the self contraction force, the clamping ring cavity expands at the moment, and the copper pipe is conveniently placed in. After the copper pipe is put in place, the external jacking driving piece is retracted, the jacking connecting rod 131 moves downwards under the action of the elastic force applied by the strong spring, the sliding fixing seat 135 drives the internal expansion connecting rod 153 to descend, the jaw cylinder 173 of the internal jaw 170 is opened due to the transverse tension applied by the expanding end 155, outward pressure is applied to the inner wall of the copper pipe through the second clamping teeth 177, the copper pipe is locked, and the structure and the position of the external jaw 190 cannot be changed in the whole process. Through the combined force application of the inner clamping jaws 170 and the outer clamping jaws 190, the key is enough tension force during the pipe expanding or other pipe processing operation, and the consistency of the pipe heads is ensured.

Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one of ordinary skill in the pertinent art without departing from the scope or spirit of the present invention, and the scope of the present invention is defined by the appended claims.

Claims

1. The expansion pipe fixing base is characterized by comprising a base body (110), a jacking mechanism (130), a pressing abutting part (150), an inner clamping jaw (170) and an outer clamping jaw (190), wherein the inner clamping jaw (170) and the outer clamping jaw (190) are both connected with the base body (110), the outer clamping jaw (190) is provided with a clamping passage (111) for a pipe head to extend into, part of the inner clamping jaw (170) extends into the clamping passage (111), a clamping ring cavity (113) for clamping the pipe head is formed between the outer clamping jaw (190) and the inner clamping jaw (170), the jacking mechanism (130) is movably arranged on the base body (110), the pressing abutting part (150) is connected with the jacking mechanism (130), and the jacking mechanism (130) is used for driving the pressing abutting part (150) to push the inner clamping jaw (170) and/or the outer clamping jaw (190), so that the outer jaw (190) and the inner jaw (170) are relatively close to each other and clamped on the pipe head.

2. The expansion pipe fixing base of claim 1, wherein the pressing abutting piece (150) comprises an outer contraction sleeve (151), the outer contraction sleeve (151) is connected with the jacking mechanism (130), and the jacking mechanism (130) is used for driving the outer contraction sleeve (151) to push the outer jaws (190) so that the outer jaws (190) are drawn together towards the inner jaws (170).

3. The expansion pipe fixing base according to claim 2, characterized in that the outer shrink sleeve (151) comprises a holding convex ring (1511) and a connecting piece (1513), the holding convex ring (1511) is arranged on the connecting piece (1513) and is annularly arranged on the outer side of the outer jaw (190), and the connecting piece (1513) is connected with the jacking mechanism (130).

4. The expansion pipe fixing base according to claim 2, wherein the outer clamping jaw (190) comprises a plurality of clamping blocks (191) and a clamping jaw fixing base (193), the clamping jaw fixing base (193) is connected with the base body (110), the clamping blocks (191) are movably arranged on the clamping jaw fixing base (193) and surround to form the clamping channel (111), and the outer shrinkage sleeve (151) is used for pushing the clamping blocks (191) so that the clamping blocks (191) are drawn close to the inner clamping jaw (170).

5. The tube expansion fixing base of claim 4, wherein a plurality of pin shafts (195) are arranged on the jaw fixing base (193), and the clamping block (191) is rotatably connected to the jaw fixing base (193) through the pin shafts (195).

6. The expansion pipe fixing base of claim 5, characterized in that each clamping block (191) comprises a clamping part (1911) and a toggle part (1913) which are connected with each other, one side of the toggle part (1913) close to the clamping part (1911) is provided with a shaft hole for accommodating the pin (195), and the clamping part (1911) is bent relative to the toggle part (1913) in a direction far away from the clamping channel (111).

7. The tube expansion fixing base according to claim 4, characterized in that each of the latches (191) is provided with a plurality of first latches (197) near the inner side surface of the catching channel (111).

8. The expansion pipe fixing base according to claim 1 or 2, wherein the pressing abutting piece (150) comprises an inner expanding connecting rod (153) and an expanding end head (155), the expanding end head (155) is connected to the jacking mechanism (130) through the inner expanding connecting rod (153), the inner expanding connecting rod (153) penetrates through the inner jaws (170), and the expanding end head (155) is used for pushing the inner jaws (170) under the driving of the jacking mechanism (130) so as to enable the inner jaws (170) to be close to the outer jaws (190).

9. The expansion joint foot according to claim 8, characterized in that the diameter of the expanding head (155) increases gradually towards the direction away from the jacking means (130).

10. The expansion tube fixing base according to claim 8, wherein the inner jaw (170) comprises a jaw support seat (171) and a jaw cylinder (173), one end of the jaw cylinder (173) is connected with the jaw support seat (171), the other end of the jaw cylinder extends into the clamping channel (111), the inner expanding link (153) sequentially passes through the support seat and the jaw cylinder (173), one end of the jaw cylinder (173) extending into the clamping channel (111) is provided with a plurality of clamping sheets (175), the plurality of clamping sheets (175) are enclosed outside the inner expanding link (153), and the expanding end head (155) is used for being pressed on the inner side of the plurality of clamping sheets (175).

11. The tube expansion fixing base according to claim 10, wherein the outer side surface of each of the clamping pieces (175) is provided with a plurality of second clamping teeth (177).

12. The expansion pipe fixing base of claim 1, wherein the jacking mechanism (130) comprises a jacking connecting rod (131), an elastic member (133) and a sliding fixing base (135), the sliding fixing base (135) is slidably disposed in the base body (110) and connected to the pressing abutting member (150), one end of the jacking connecting rod (131) is connected to the sliding fixing base (135), the other end of the jacking connecting rod (131) extends out of the base body (110), and the elastic member (133) is respectively connected to the base body (110) and the jacking connecting rod (131) for driving the pressing abutting member (150).

13. The expansion pipe fixing base of claim 12, wherein the elastic member (133) is a spring, the spring is sleeved on the jacking connecting rod (131), a limiting sleeve (137) is arranged at one end of the jacking connecting rod (131) extending out of the base body (110), one end of the spring is connected with the base body (110), and the other end of the spring is connected with the limiting sleeve (137).