CN218395633U

CN218395633U - Device for assembling flat flange on EGR (exhaust gas recirculation) pipe fitting

Info

Publication number: CN218395633U
Application number: CN202222125700.6U
Authority: CN
Inventors: 毛涛; 史亮; 刘达; 孙楠; 蒋燕刚; 于翠翠; 刘庆明; 叶贵清; 苏海
Original assignee: Liaoning Lianyoubo Technology Co ltd
Current assignee: Liaoning Lianyoubo Technology Co ltd
Priority date: 2022-08-12
Filing date: 2022-08-12
Publication date: 2023-01-31
Anticipated expiration: 2032-08-12

Abstract

A device for assembling a flat flange on an EGR pipe fitting is characterized in that a cavity for accommodating the EGR pipe fitting is formed between an upper die and a lower die; the cavity is communicated with openings arranged at the edges of the upper die and the lower die; the expansion head is positioned between the positioning disc and the adapter, and the expansion head extends out of the through hole of the positioning disc; one end of the adapter is connected with the positioning disc, and the other end of the adapter is positioned in the sleeve joint barrel; one end of the expansion needle is positioned in the sleeve joint barrel, and the other end of the expansion needle extends into the expansion head through the adapter; the dog is connected in the one end that the positioning disk was kept away from to the socket joint section of thick bamboo, and the needle that expands stretches into the dog in the one end of socket joint section of thick bamboo. The utility model can replace the original interference assembly scheme, and effectively solve the problems of poor alignment and workpiece damage during interference assembly; meanwhile, for a product with a too short positioning clamping straight section, the clearance assembly can be carried out without considering the resistance of interference assembly, the conditions that a workpiece slips and the assembly cannot be completed are avoided, and the excellent finished product size stability is achieved.

Description

Device for assembling flat flange on EGR (exhaust gas recirculation) pipe fitting

Technical Field

The utility model relates to a device for flat flange of EGR pipe fitting assembly belongs to EGR pipe processing technology field.

Background

In an automobile engine, an exhaust gas recirculation system is generally adopted, and EGR is a technique in which a part of exhaust gas is separated after combustion in an internal combustion engine and introduced to an intake side to be combusted again, and is advantageous for reducing Nitrogen Oxides (NO) in the exhaust gas _X ) And particles, and can improve the fuel consumption rate and further improve the fuel economy when sharing partial load.

At present, most of the assemblies of EGR pipe products in the industry use interference assembly schemes. The pipe fitting is positioned by using a mold cavity, the flange is positioned by a positioning pin, the centers of the two parts are adjusted to be aligned, and the interference assembly of the two parts is realized by thrust. Its advantages are simple structure, easy machining, and obvious defects. Poor centering and workpiece damage are easy to occur during interference assembly; meanwhile, for a product with a short positioning clamping straight section, the clamping short friction force is small, the situations that the pipe fitting slips and cannot be assembled frequently occur, or the situations that the appearance of a finished product is poor, the space size is poor, the service life of a die is reduced and the like are caused.

SUMMERY OF THE UTILITY MODEL

Therefore, the utility model provides a device for flat flange of EGR pipe fitting assembly can realize clearance assembly, solves bad, the work piece damage problem of heart that traditional interference fit exists.

In order to achieve the above object, the present invention provides the following technical solutions: a device for assembling a flat flange on an EGR (exhaust gas recirculation) pipe fitting comprises an upper die, a lower die, an expansion head, a positioning disc, a switching piece, a sleeve barrel, an expansion needle and a stop block;

a cavity for accommodating an EGR pipe fitting is formed between the upper die and the lower die; the cavity is communicated with openings arranged at the edges of the upper die and the lower die;

the expansion head is positioned between the positioning disc and the adapter piece, and the expansion head extends out of the through hole of the positioning disc; one end of the adapter is connected with the positioning disc, and the other end of the adapter is positioned in the sleeve joint barrel; one end of the expansion needle is positioned in the sleeve joint barrel, and the other end of the expansion needle extends into the expansion head through the adapter;

the stop block is connected to one end, far away from the positioning disc, of the sleeve joint barrel, and the expansion needle is located at one end, far away from the positioning disc, of the sleeve joint barrel and stretches into the stop block.

As the preferred scheme of the device for assembling the flat flange on the EGR pipe fitting, the device further comprises a positioning piece, wherein the positioning piece is connected to the front side of the lower die, and a positioning groove for limiting the EGR pipe fitting is formed in the positioning piece.

As a preferable scheme of the device for assembling the flat flange on the EGR pipe, the upper die is formed with a guide through hole, and the lower die is connected with a guide post which is inserted into the guide through hole.

As a preferable scheme of the device for assembling the flat flange on the EGR pipe fitting, a tapered hole is formed in the center of the expansion head, and one end of the expansion needle inserted into the expansion head is tapered.

As a preferable scheme of the device for assembling the flat flange on the EGR pipe fitting, a positioning pin is connected to the outer side of the positioning plate; the expansion head is positioned between the positioning pins.

As a preferable scheme of the device for assembling the flat flange on the EGR pipe fitting, a first limit flange is formed at one end of the expanding needle inside the sleeve, and the first limit flange contacts the stop block.

The device for assembling the flat flange on the EGR pipe fitting preferably further comprises a locking block, one end of the locking block is located in the adapter, a second limit flange is formed on the locking block, and the second limit flange contacts with the side of the adapter;

a limiting step is formed inside the sleeve joint barrel, and a sliding gap is formed between the adaptor and the sleeve joint barrel; when the sleeve joint barrel slides in the sliding gap, the limiting step limits through the second limiting flange;

the expanding needle is inserted into the adaptor through the locking block.

The device for assembling the flat flange on the EGR pipe fitting preferably further comprises a buffer spring, wherein the buffer spring is located inside the sleeve, and the buffer spring is located between the first limit flange and the second limit flange; the expansion needle penetrates through the buffer spring.

The utility model has the advantages of as follows: a cavity for accommodating the EGR pipe fitting is formed between the upper die and the lower die; the cavity is communicated with openings arranged at the edges of the upper die and the lower die; the expansion head is positioned between the positioning disc and the adapter, and the expansion head extends out of the through hole of the positioning disc; one end of the adapter is connected with the positioning disc, and the other end of the adapter is positioned in the sleeve joint barrel; one end of the expansion needle is positioned in the sleeve joint barrel, and the other end of the expansion needle extends into the expansion head through the adapter; the dog is connected in the one end that the positioning disk was kept away from to the socket joint section of thick bamboo, and the needle that expands stretches into the dog in the one end of socket joint section of thick bamboo. The utility model can replace the original interference assembly scheme, and effectively solve the problems of poor alignment and workpiece damage during interference assembly; meanwhile, for a product with a too short positioning clamping straight section, the clearance assembly can be carried out without considering the resistance of interference assembly, the conditions that a workpiece slips and the assembly cannot be completed are avoided, and the excellent finished product size stability is achieved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.

The structure, ratio, size and the like shown in the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by people familiar with the technology, and are not used for limiting the limit conditions which can be implemented by the present invention, so that the present invention has no technical essential significance, and any structure modification, ratio relationship change or size adjustment should still fall within the scope which can be covered by the technical content disclosed by the present invention without affecting the efficacy and the achievable purpose of the present invention.

Fig. 1 is an exploded schematic view of an apparatus for assembling a flat flange on an EGR pipe provided in an embodiment of the present invention;

fig. 2 is the embodiment of the utility model provides a section schematic diagram after device that is used for flat flange of EGR pipe fitting assembly expands head, positioning disk, adaptor, a socket joint section of thick bamboo, bloated needle and dog assemble that provides.

In the figure, 1, an upper die; 2. a lower die; 3. expanding the head; 4. positioning a plate; 5. an adapter; 6. sleeving a barrel; 7. Expanding the needle; 8. a stopper; 9. a cavity; 10. an opening; 11. a positioning member; 12. positioning a groove; 13. a guide port; 14. a guide post; 15. positioning pins; 16. a first stop flange; 17. a locking block; 18. a second position-defining flange; 19. a limiting step; 20. a sliding gap; 21. a buffer spring.

Detailed Description

The present invention is described in terms of specific embodiments, and other advantages and benefits of the present invention will become apparent to those skilled in the art from the following disclosure. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1 and 2, an embodiment of the present invention provides a device for assembling a flat flange on an EGR pipe, including an upper die 1, a lower die 2, an expansion head 3, a positioning disc 4, an adaptor 5, a sleeve 6, an expansion needle 7 and a stopper 8;

a cavity 9 for accommodating an EGR pipe fitting is formed between the upper die 1 and the lower die 2; the cavity 9 is communicated with an opening 10 arranged at the edge of the upper die 1 and the lower die 2;

the expansion head 3 is positioned between the positioning disk 4 and the adapter 5, and the expansion head 3 extends out of a through hole of the positioning disk 4; one end of the adapter 5 is connected with the positioning disc 4, and the other end of the adapter 5 is positioned in the sleeve 6; one end of the expansion needle 7 is positioned in the sleeve joint barrel 6, and the other end of the expansion needle 7 extends into the expansion head 3 through the adaptor 5;

wherein, dog 8 is connected in the one end that the cover sleeve 6 kept away from the positioning disk, and the one end that needle 7 expands is in cover sleeve 6 stretches into dog 8.

In this embodiment, still include setting element 11, the front side at lower mould 2 is connected to setting element 11, and setting element 11 is formed with carries out spacing constant head tank 12 to the EGR pipe fitting. Because the EGR pipe fitting is irregular, after the EGR pipe fitting is placed in the cavity 9, the auxiliary positioning is carried out through the positioning groove 12, and the smooth assembly of the EGR pipe fitting and the flat flange is ensured.

In this embodiment, the upper die 1 is formed with a guide through hole 13, the lower die 2 is connected with a guide post 14, and the guide post 14 is inserted into the guide through hole 13. The guide through holes 13 and the guide posts 14 ensure the accuracy of butt joint of the upper die 1 and the lower die 2, and can clamp and position the EGR pipe fitting placed in the cavity 9.

In this embodiment, a tapered hole is formed in the center of the expansion head 3, and one end of the expansion needle 7 inserted into the expansion head 3 is tapered. The outer side of the positioning plate 4 is connected with a positioning pin 15; the expansion head 3 is located between the positioning pins 15.

Specifically, what expand head 3 adopted is that the material that can warp makes, like rubber, and the flat flange of pre-installation passes through locating pin 15 montage, and the cooperation through expanding needle 7 and expanding head 3 can expand tightly to the flat flange part of pre-installation simultaneously, expands needle 7 and advances to expanding head 3 promptly, makes expanding head 3 take place radial displacement expansion, and then expands tightly (flat flange center is porose) to the flat flange part.

In this embodiment, a first limit flange 16 is formed at one end of the expanding needle 7 inside the sleeve 6, and the first limit flange 16 contacts the stopper 8. After the sleeve joint cylinder 6 and the stop dog 8 are assembled, the expansion needle 7 can be limited due to the design of the first limiting flange 16, so that the expansion needle 7 can be driven to move when the sleeve joint cylinder 6 is driven.

In the embodiment, the locking device further comprises a locking block 17, one end of the locking block 17 is positioned in the adaptor 5, the locking block 17 is provided with a second limiting flange 18, and the second limiting flange 18 contacts the side part of the adaptor 5; a limiting step 19 is formed inside the sleeve 6, and a sliding gap 20 is formed between the adaptor 5 and the sleeve 6; when the sleeve joint barrel 6 slides in the sliding gap 20, the limiting step 19 is limited through the second limiting flange 18; the expanding needle 7 is inserted into the adaptor 5 via the locking block 17. The buffer spring 21 is positioned in the sleeve joint barrel 6, and the buffer spring 21 is positioned between the first limit flange 16 and the second limit flange 18; the expansion needle 7 passes through the buffer spring 21.

Specifically, through the locking of latch segment 17 and adaptor 5 fixed, cooperation second limit flange 18 and spacing step 19 realize the removal stroke control of a socket 6, when a socket 6 moves to the direction that is close to adaptor 5, second limit flange 18 contacts spacing step 19 and reaches spacing effect, and buffer spring 21 compression between first limit flange 16 and the second limit flange 18 simultaneously can realize buffering reset effect. And the following movement of the expansion needle 7 is that the expansion needle 7 is inserted into the expansion head 3 due to the pushing of the stop dog 8 connected with the sleeve 6 to the first limit flange 16, the expansion head 3 realizes the effect of expanding and tightening the flat flange part, and further realizes the clearance assembly of the EGR pipe fittings in the flat flange and the cavity 9.

To sum up, a cavity 9 for accommodating an EGR pipe fitting is formed between the upper die 1 and the lower die 2; the cavity 9 is communicated with an opening 10 arranged at the edge of the upper die 1 and the lower die 2; the expansion head 3 is positioned between the positioning disk 4 and the adapter 5, and the expansion head 3 extends out of the through hole of the positioning disk 4; one end of the adapter 5 is connected with the positioning disc 4, and the other end of the adapter 5 is positioned in the sleeve joint barrel 6; one end of the expansion needle 7 is positioned in the sleeve 6, and the other end of the expansion needle 7 extends into the expansion head 3 through the adaptor 5; the dog 8 is connected in the one end that the positioning disk was kept away from to a cover sleeve 6, and the one end that the needle 7 that expands is in a cover sleeve 6 stretches into dog 8. Because the EGR pipe fitting is irregular, after the EGR pipe fitting is placed in the cavity 9, the auxiliary positioning is carried out through the positioning groove 12, and the smooth assembly of the EGR pipe fitting and the flat flange is ensured. The guide through hole 13 and the guide post 14 ensure the accuracy of butt joint of the upper die 1 and the lower die 2, and can clamp and position the EGR pipe fitting placed in the cavity 9. After the sleeve joint cylinder 6 and the stop dog 8 are assembled, the expansion needle 7 can be limited due to the design of the first limiting flange 16, so that the expansion needle 7 can be driven to move when the sleeve joint cylinder 6 is driven. Through the locking of latch segment 17 and adaptor 5 fixed, cooperation second limit flange 18 and spacing step 19 realize the removal stroke control of a socket 6, when the socket 6 removed to the direction that is close to adaptor 5, second limit flange 18 contact spacing step 19 reached spacing effect, and buffer spring 21 compression between first limit flange 16 and the second limit flange 18 simultaneously can realize buffering reset effect. And the following movement of the expansion needle 7 is that the expansion needle 7 is inserted into the expansion head 3 due to the pushing of the stop dog 8 connected with the sleeve 6 to the first limit flange 16, the expansion head 3 realizes the effect of expanding and tightening the flat flange part, and further realizes the clearance assembly of the EGR pipe fittings in the flat flange and the cavity 9. The utility model can replace the original interference assembly scheme, and effectively solve the problems of poor alignment and workpiece damage during interference assembly; meanwhile, for a product with a too short positioning clamping straight section, the clearance assembly can be carried out without considering the resistance of interference assembly, the conditions that a workpiece slips and the assembly cannot be completed are avoided, and the excellent finished product size stability is achieved.

Although the invention has been described in detail with respect to the general description and the specific embodiments, it will be apparent to those skilled in the art that modifications and improvements can be made based on the invention. Therefore, such modifications and improvements are intended to be within the scope of the invention as claimed.

Claims

1. A device for assembling a flat flange on an EGR (exhaust gas recirculation) pipe fitting is characterized by comprising an upper die (1), a lower die (2), an expansion head (3), a positioning disc (4), an adapter (5), a sleeve joint cylinder (6), an expansion needle (7) and a stop block (8);

a cavity (9) for accommodating an EGR pipe fitting is formed between the upper die (1) and the lower die (2); the cavity (9) is communicated with openings (10) arranged at the edges of the upper die (1) and the lower die (2);

the expansion head (3) is positioned between the positioning disc (4) and the adaptor (5), and the expansion head (3) extends out of the through hole of the positioning disc (4); one end of the adapter piece (5) is connected with the positioning disc (4), and the other end of the adapter piece (5) is positioned inside the sleeve joint barrel (6); one end of the expansion needle (7) is positioned in the sleeve joint barrel (6), and the other end of the expansion needle (7) extends into the expansion head (3) through the adapter (5);

the stop block (8) is connected to one end, far away from the positioning disc (4), of the sleeve joint barrel (6), and the expansion needle (7) is located at one end, far away from the positioning disc, of the sleeve joint barrel (6) and stretches into the stop block (8).

2. The device for assembling the flat flange for the EGR pipe according to claim 1, further comprising a positioning member (11), wherein the positioning member (11) is connected to a front side of the lower mold (2), and the positioning member (11) is formed with a positioning groove (12) for positioning the EGR pipe.

3. The device for assembling flat flanges for EGR tubes according to claim 1, characterized in that the upper die (1) is formed with guide through openings (13), and guide posts (14) are connected to the lower die (2), and the guide posts (14) are inserted into the guide through openings (13).

4. The device for assembling the flat flange for the EGR pipe according to claim 1, wherein the center of the expansion head (3) is formed with a tapered hole, and one end of the expansion pin (7) inserted into the expansion head (3) is tapered.

5. The device for assembling the flat flange of the EGR pipe fitting according to claim 4, characterized in that a positioning pin (15) is connected to the outer side of the positioning plate (4); the expansion head (3) is arranged between the positioning pins (15).

6. Device for assembling a flat flange for an EGR pipe according to claim 5, characterized in that the end of the expanding needle (7) inside the socket (6) is formed with a first limit flange (16), the first limit flange (16) contacting the stop (8).

7. The device for assembling the flat flange of the EGR pipe fitting according to claim 6, further comprising a locking block (17), wherein one end of the locking block (17) is positioned in the adaptor (5), the locking block (17) is formed with a second limit flange (18), and the second limit flange (18) contacts with the side of the adaptor (5);

a limiting step (19) is formed inside the sleeve joint barrel (6), and a sliding gap (20) is formed between the adaptor (5) and the sleeve joint barrel (6); when the sleeve joint barrel (6) slides in the sliding gap (20), the limiting step (19) is limited through the second limiting flange (18);

the expanding needle (7) is inserted into the adaptor (5) through the locking block (17).

8. The device for assembling flat flanges for EGR pipes according to claim 7, characterized in that it further comprises a buffer spring (21), said buffer spring (21) being inside said socket (6), said buffer spring (21) being between said first limit flange (16) and said second limit flange (18); the expansion needle (7) penetrates through the buffer spring (21).