Electric flaring device chuck

Abstract

The utility model belongs to the technical field of electric flaring devices, and particularly relates to a chuck of an electric flaring device. In order to overcome the defect that clamping jaws of an existing electric flaring device chuck are integrally machined by aluminum materials, the electric flaring device chuck adopts the following technical scheme that the electric flaring device chuck comprises two clamping jaws which are rotationally connected; wherein each clamping jaw comprises a wear-resistant insert and an injection molding body wrapping the wear-resistant insert, and the injection molding bodies and the wear-resistant inserts are connected into a whole in the forming process. The electric flaring device chuck has the advantages that each clamping jaw comprises the wear-resistant insert and the injection molding body wrapping the wear-resistant insert, and the injection molding bodies and the wear-resistant inserts are connected into a whole in the forming process. The wear-resistant insert can be machined in advance (for example, injection molding is conducted through metal powder) and then injection molding is conducted, the machining difficulty is lower, and the wear-resistant insert can be made of materials with the performance higher than that of aluminum materials.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of electric flaring device, specifically relates to electric flaring device chuck. BACKGROUND

[0002] In the field of heating and ventilation technology, copper pipe flaring is often needed. Copper pipe flaring refers to the processing technology of expanding the copper pipe wall outward at a certain angle (horn shape) at the end of the copper pipe. The main purpose of this process is to better connect the copper pipe and the pipe fitting to prevent pipe leakage.

[0003] The existing electric flaring device for copper pipe flaring (see the Chinese utility model patent with the authorization announcement number CN209969404U, etc.), the clamping jaw of the chuck is machined integrally from aluminum material (7 aviation aluminum), which is complicated in process, low in processing efficiency, high in production cost, and poor in overall wear resistance (especially the parts at the two ends in the width direction which frequently bear the pressing force in the width direction). SUMMARY

[0004] The utility model provides electric flaring device chuck in view of the deficiency that the clamping jaw of the existing electric flaring device chuck is machined integrally from aluminum material, and the clamping jaw adopts different structures, so that it can be processed by a method different from integral machining. Further, the wear resistance of the chuck is improved, and the service life of the chuck is further improved.

[0005] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: the electric flaring device chuck comprises:

[0006] Two clamping jaws connected in rotation;

[0007] Among them, the two clamping jaws each comprise a wear-resistant insert and an injection body covering the wear-resistant insert, and the injection body is integrated with the wear-resistant insert when forming.

[0008] The electric flaring device chuck of the utility model, the two clamping jaws each comprise a wear-resistant insert and an injection body covering the wear-resistant insert, and the injection body is integrated with the wear-resistant insert when forming. Compared with the integral machining method of the aluminum material in the prior art, the processing difficulty is lower, and the wear-resistant insert can be made of a material with stronger performance than aluminum.

[0009] As an improvement, the injection body of the two clamping jaws only partially covers the wear-resistant insert, and the two wear-resistant inserts each have at least one stress part exposed to the injection body.

[0010] As an improvement, the two clamping jaws are respectively a first clamping jaw and a second clamping jaw, the first clamping jaw comprises a first wear-resistant insert and a first injection body, and the second clamping jaw comprises a second wear-resistant insert and a second injection body, the first wear-resistant insert forms a first width stress part located at a first side in the width direction of the chuck and a first surface stress part located at the center in the width direction of the chuck, and the second wear-resistant insert forms a second width stress part located at a second side in the width direction of the chuck and a second surface stress part located at the center in the width direction of the chuck.

[0011] As an improvement, the first wear-resistant insert and the second wear-resistant insert are different, one of the first width stress part and the second width stress part is substantially in the shape of a concave character, and the other has a cylindrical part; or,

[0012] The first wear-resistant insert and the second wear-resistant insert are the same, and the first clamping jaw and the second clamping jaw both have a first width stress part substantially in the shape of a concave character and a second width stress part in the shape of a column.

[0013] As an improvement, the first wear-resistant insert and the second wear-resistant insert are different, the second width stress part of the second wear-resistant insert of the second clamping jaw has a cylindrical part at an outer end and a first columnar part at an inner end with a diameter greater than that of the cylindrical part, the first wear-resistant insert of the first clamping jaw forms a second columnar part with the same diameter and concentric with the first columnar part, and the axis of the cylindrical part is perpendicular to the first surface stress part

[0014] As an improvement, the two wear-resistant inserts both form a clamping stress part in the shape of a semicircle; and / or,

[0015] The two wear-resistant inserts both form a flared stress part in the shape of a semicircular cone; and / or,

[0016] The two wear-resistant inserts both form an axial stress part flush with or protruding outward from the injection body.

[0017] The two wear-resistant inserts both form an axial stress part flush with or protruding outward from the injection body.

[0018] As an improvement, the clamping stress part comprises a plurality of semicircular ribs distributed in the axial direction.

[0019] As an improvement, the wear-resistant insert further forms a plurality of reinforcing parts for improving the connection strength between the wear-resistant insert and the injection body, and the plurality of reinforcing parts comprise at least one of an axial reinforcing part, a radial reinforcing part and a circumferential reinforcing part.

[0020] As an improvement, holes and grooves are formed on at least part of the reinforcing parts.

[0021] As an improvement, the wear-resistant insert is formed by metal powder injection molding; and / or,

[0022] The wear-resistant insert is made of stainless steel.

[0023] As an improvement, the electric expander chuck further comprises a cap pin shaft, and the two clamping jaws are both provided with through holes matched with the cap pin shaft;

[0024] The electric expander chuck further comprises a spring seat and a screw, the spring seat is sleeved on the cap pin shaft, the screw is threadedly connected with the cap pin shaft and fastens the spring seat and the cap pin shaft, and the spring seat is externally provided with a torsion spring, and the two ends of the torsion spring are respectively abutted against the two clamping jaws;

[0025] The spring seat is in T shape, the spring seat comprises a small-diameter section near the cap end of the cap pin shaft and a large-diameter section away from the cap end of the cap pin shaft, the electric expander chuck further comprises a swing limiting piece arranged outside the spring seat, the swing limiting piece comprises an inner radial portion, an axial portion and an outer radial portion, a blocking portion, a stress avoiding portion and a reset stress portion are formed on the outer radial portion, the reset stress portion is located between the operation portions of the two clamping jaws, and the outer radial portion and the cap portion of the cap pin shaft limit the axial direction of the clamping jaws.

[0026] The electric expander chuck of the utility model has the advantages that the two clamping jaws both comprise a wear-resistant insert and an injection body covering the wear-resistant insert, the injection body is integrally formed with the wear-resistant insert during molding, compared with the prior art which adopts an overall machining mode for aluminum materials, the wear-resistant insert can be pre-processed (for example, by metal powder injection molding) and then injection molded, the processing difficulty is lower, and the wear-resistant insert can be made of a material with stronger performance than aluminum materials. The main improvement point of the utility model lies in that the clamping jaws of the electric expander chuck comprise a wear-resistant insert and an injection body, instead of an overall machining structure. Further, the structure of the wear-resistant insert is optimized, the wear-resistant insert bears the main force, and the reliability and service life of the chuck are significantly improved. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 And Figure 2 are structural schematic diagrams of the electric expander chuck of the utility model embodiment one from different angles.

[0028] Figure 3 And Figure 4 are structural exploded views of the electric expander chuck of the utility model embodiment one from different angles.

[0029] Figure 5 is a structural exploded view of the first clamping jaw of the electric expander chuck of the utility model embodiment one.

[0030] Figure 6 is a structural exploded view of the second clamping jaw of the electric expander chuck of the utility model embodiment one.

[0031] Figure 7 And Figure 8 are structural schematic diagrams of the first wear-resistant insert and the second wear-resistant insert of the electric expander chuck of the utility model embodiment one from different angles.

[0032] Figure 9 Figure 1 is a structural schematic diagram of a first wear-resistant insert of the electric flaring tool chuck according to the first embodiment of the present application.

[0033] Figure 10 Figure 2 is a structural schematic diagram of a second wear-resistant insert of the electric flaring tool chuck according to the first embodiment of the present application.

[0034] In the figure, 1, first jaw; 11, first wear-resistant insert; 110, first surface stress part; 111, first width stress part; 112, clamping stress part; 1121, semicircular reinforcing rib; 113, reinforcing block; 114, shaft hole stress part; 115, axial stress part; 116, reinforcing part; 117, hole groove; 118, flaring stress part; 119, positioning hole; 12, first injection body;

[0035] 2, second jaw; 21, second wear-resistant insert; 210, second surface stress part; 211, second width stress part; 212, positioning column; 222, second injection body;

[0036] 3, cap pin;

[0037] 4, spring seat;

[0038] 5, screw;

[0039] 6, torsional spring;

[0040] 7, swing limiting piece. DETAILED DESCRIPTION

[0041] The technical solutions of the embodiments of the present application are explained and described below, but the following embodiments are only preferred embodiments of the present application, not all. Based on the embodiments in the embodiments, other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the present application.

[0042] Referring to Figures 1 to 10 , the electric flaring tool chuck according to the first embodiment of the present application comprises:

[0043] Two rotatingly connected jaws;

[0044] Among them, the two jaws each comprise a wear-resistant insert and an injection body covering the wear-resistant insert, and the injection body is integrally connected with the wear-resistant insert when being formed.

[0045] In the embodiment, the injection body of the two jaws only partially covers the wear-resistant insert, and the two wear-resistant inserts each have at least one stress part exposed to the injection body. The two wear-resistant inserts each have a plurality of stress parts exposed to the injection body.

[0046] In this embodiment, the two grippers are a first gripper 1 and a second gripper 2. The first gripper 1 includes a first wear-resistant insert 11 and a first injection-molded body 12. The second gripper 2 includes a second wear-resistant insert 21 and a second injection-molded body 222. The first wear-resistant insert 11 forms a first width force-bearing portion 111 located on a first side in the width direction of the gripper and a first surface force-bearing portion 110 located at the center in the width direction of the gripper. The second wear-resistant insert 21 forms a second width force-bearing portion 211 located on a second side in the width direction of the gripper and a second surface force-bearing portion 210 located at the center in the width direction of the gripper.

[0047] In this embodiment, the first wear-resistant insert 11 and the second wear-resistant insert 21 are different. One of the first width force-bearing portion 111 and the second width force-bearing portion 211 is approximately U-shaped, while the other has a cylindrical portion. The first width force-bearing portion 111 has two planar portions that are substantially flush with the width side of the first injection-molded body 12 and a semi-circular portion between the two planar portions. The first gripper 1 has two first width force-bearing portions 111.

[0048] In other embodiments, the first wear-resistant insert 11 and the second wear-resistant insert 21 may be identical, both having a generally U-shaped first width force-bearing portion 111 and a columnar second width force-bearing portion 211. When the first wear-resistant insert 11 and the second wear-resistant insert 21 are identical, the number of parts can be reduced.

[0049] In this embodiment, both wear-resistant inserts form semi-circular clamping force-bearing portions 112. The clamping force-bearing portions 112 are used to clamp the copper tube.

[0050] In this embodiment, both wear-resistant inserts form a semi-conical cylindrical flared force-bearing portion 118. The flared force-bearing portion 118 is used to cooperate with the conical flaring head of the electric flaring device to achieve flaring.

[0051] In this embodiment, both wear-resistant inserts form circular shaft hole force-bearing portions 114 for the rotation of the grippers. Both shaft hole force-bearing portions 114 are formed with shaft holes of equal diameter and concentric.

[0052] In this embodiment, both wear-resistant inserts form axial force-bearing portions 115, which protrude outward from the injection-molded body. The axial force-bearing portions 115 are located on the side where the non-limiting member is located in the thickness direction of the chuck. The axial force-bearing portions 115 are used to withstand the axial force from the electric flaring device body.

[0053] In other embodiments, the axially stressed portion 115 may also be flush with the injection-molded body.

[0054] In this embodiment, the clamping force-bearing part 112 includes multiple semi-circular ribs 1121 distributed axially.

[0055] In this embodiment, the wear-resistant inserts also form a plurality of reinforcing portions 116 for improving the connection strength of the wear-resistant inserts with the injection-molded body, the plurality of reinforcing portions 116 including at least one of an axial reinforcing portion 116, a radial reinforcing portion 116, and a circumferential reinforcing portion 116. The first width stress portion 111 and the second width stress portion 211 each have the effect of improving the connection strength of the wear-resistant inserts with the injection-molded body.

[0056] In this embodiment, the two wear-resistant inserts, when combined (in the state of clamping the copper pipe), include a substantially I-shaped cylindrical portion and an axial hole stress portion 114 extending radially from the cylindrical portion. The I-shaped cylindrical portion has the effects of axial reinforcement and radial reinforcement. The axial hole stress portion 114 has the effect of circumferential reinforcement. The cylindrical portion has a clamping hole for clamping the copper pipe, and an axial end of the cylindrical portion forms an axial stress portion 115 having a certain thickness, the thickness of the axial stress portion 115 being smaller than the thickness of the injection-molded body. A portion of the substantially circular axial stress portion 115 near the axial hole stress portion 114 extends outward in parallel with the radial direction to form a circumferential reinforcing portion 116. The rectangular connecting portion of the axial hole stress portion 114 and the cylindrical portion forms an axial through hole 117 (hole). The rectangular connecting portion of the axial hole stress portion 114 and the cylindrical portion also extends outward in parallel with the radial direction to form a T-shaped reinforcing portion 116, and the axial hole stress portion 114 also extends outward in parallel with the radial direction to form a T-shaped reinforcing portion 116. The two concave-shaped first width stress portions 111 also form two axial reinforcing blocks 113. The two reinforcing blocks 113 connect the two axial ends of the cylindrical portion.

[0057] In this embodiment, the second width stress portion 211 is tangent to the middle portion of the I-shaped cylindrical portion, and the inner side of the second width stress portion 211 of the second wear-resistant insert 21 of the second clamping jaw 2 also forms a second columnar portion with a larger diameter, and the first wear-resistant insert of the first clamping jaw 1 forms a first columnar portion with the same diameter and concentric with the second columnar portion. With this structure, the structural strength of the two wear-resistant inserts when combined (after flaring) is improved.

[0058] In this embodiment, holes 117 are formed in at least part of the reinforcing portions 116. The holes 117 are beneficial to the flow of the injection-molded body during molding, and can also improve the connection strength of the wear-resistant inserts and the injection-molded body. Axial through holes 117 (long holes) are formed in the axial stress portion 115. Axial through holes 117 (round holes) are formed in the concave-shaped first width stress portion 111. The first width stress portion 111 has the effects of circumferential reinforcement and axial reinforcement. Axial through holes 117 (open slots) are formed in the first columnar portion and the second columnar portion.

[0059] In this embodiment, the wear-resistant inserts are made of metal powder injection molding.

[0060] In this embodiment, the wear-resistant inserts are made of stainless steel.

[0061] In the embodiment, the first wear-resistant insert 11 is formed with a positioning hole 119 away from the shaft hole stress part 114, and the second wear-resistant insert 21 is formed with a positioning column 212, which comprises a columnar base part and a frustum part extending from the columnar base part to the positioning hole 119, and the end face of the frustum part is smooth.

[0062] In the embodiment, the shapes of the first injection body 12 and the second injection body 222 can refer to the drawings and the prior art.

[0063] In the embodiment, the electric expander chuck further comprises a capped pin shaft 3, and the shaft hole stress parts 114 of the two clamping jaws are each provided with a through hole matched with the capped pin shaft 3.

[0064] In the embodiment, the electric expander chuck further comprises a spring seat 4 and a screw 5, the spring seat 4 is sleeved on the capped pin shaft 3, the screw 5 is threadedly connected with the capped pin shaft 3 and fastens the spring seat 4 and the capped pin shaft 3, the spring seat 4 is externally provided with a torsion spring 6, and the two ends of the torsion spring 6 abut against the two clamping jaws respectively.

[0065] In the embodiment, the spring seat 4 is T-shaped, the spring seat 4 comprises a small-diameter section close to the cap end of the capped pin shaft 3 and a large-diameter section away from the cap end of the capped pin shaft 3, and the electric expander chuck further comprises a swing limiting piece 7 arranged outside the spring seat 4, the swing limiting piece 7 comprises an inner radial part, an axial part and an outer radial part, the outer radial part is formed with a blocking part, an avoiding stress part and a reset stress part, the reset stress part is located between the operation parts of the two clamping jaws, and the outer radial part and the cap part of the capped pin shaft 3 limit the axial direction of the clamping jaws.

[0066] The electric expander chuck of the embodiment one has the following beneficial effects: the two clamping jaws each comprise a wear-resistant insert and an injection body covering the wear-resistant insert, the injection body is integrally formed with the wear-resistant insert during molding, compared with the prior art which adopts the overall machining mode for aluminum materials, the wear-resistant insert can be pre-processed and then injection molded, and the processing difficulty is lower; the wear-resistant insert is made of stainless steel, and the wear resistance and other performances are better; the two clamping jaws form a first width stress part 111 and a second width stress part 211, and the clamping jaws bear the force in the width direction by the wear-resistant insert when being clamped tightly; a plurality of reinforcing parts 116 are formed between the wear-resistant insert and the injection body, the connecting strength between the wear-resistant insert and the injection body is high; the wear-resistant insert has a plurality of stress parts, and the wear-resistant insert bears the main force during use, so the service life is long; the two first width stress parts 111 of the first wear-resistant insert 11 of the first clamping jaw 1 are concave-shaped and are provided with two reinforcing blocks 113, and the structural strength is good; the second width stress part 211 of the second wear-resistant insert 21 of the second clamping jaw 2 is provided with a second columnar part and a first columnar part of the first clamping jaw 1, and the structural strength is high; the two wear-resistant inserts are combined to form a cylindrical part in the shape of an I-beam, and the axial strength is high.

[0067] The above merely describes specific embodiments of the present application, but the protection scope of the present application is not limited thereto, and those skilled in the art should understand that the present application includes but is not limited to the above specific embodiments. Any modification not deviating from the functional and structural principles of the present application will be included in the scope of the claims.

Claims

1. An electric flaring tool chuck, characterized in that: The electric flaring clamp includes: Two rotating grippers; Both grippers include wear-resistant inserts and injection-molded bodies covering the wear-resistant inserts. The injection-molded bodies are integrated with the wear-resistant inserts during molding.

2. The electric flaring clamp according to claim 1, characterized in that: The injection molded body of the two grippers only partially covers the wear-resistant parts, and each of the two wear-resistant inserts has at least one force-bearing part exposed outside the injection molded body.

3. The electric flaring clamp according to claim 2, characterized in that: The two grippers are a first gripper (1) and a second gripper (2). The first gripper (1) includes a first wear-resistant insert (11) and a first injection molded body (12). The second gripper (2) includes a second wear-resistant insert (21) and a second injection molded body (222). The first wear-resistant insert (11) forms a first width force-bearing part (111) located on a first side in the width direction of the gripper and a first surface force-bearing part (110) located at the center in the width direction of the gripper. The second wear-resistant insert (21) forms a second width force-bearing part (211) located on a second side in the width direction of the gripper and a second surface force-bearing part (210) located at the center in the width direction of the gripper.

4. The electric flaring clamp according to claim 3, characterized in that: The first wear-resistant insert (11) and the second wear-resistant insert (21) are different; one of the first width force-bearing portion (111) and the second width force-bearing portion (211) is approximately U-shaped, and the other has a columnar portion; or, The first wear-resistant insert (11) and the second wear-resistant insert (21) are the same. The first jaw (1) and the second jaw (2) both have a first width force-bearing part (111) that is approximately U-shaped and a second width force-bearing part (211) that is columnar.

5. The electric flaring clamp according to claim 3, characterized in that: The first wear-resistant insert (11) differs from the second wear-resistant insert (21). The first width force-bearing portion (111) is approximately U-shaped, and there are two first width force-bearing portions (111) distributed along the axial direction. A reinforcing block (113) is formed between the two first width force-bearing portions (111); and / or The first wear-resistant insert (11) and the second wear-resistant insert (21) are different. The second wear-resistant insert (21) of the second jaw (2) has a second width force-bearing part (211) with a cylindrical part at the outer end and a first columnar part at the inner end with a diameter greater than that of the cylindrical part. The first wear-resistant insert (11) of the first jaw (1) forms a second columnar part with the same diameter as the first columnar part and concentric. The axis of the columnar part is perpendicular to the first surface force-bearing part (110).

6. The electric flaring clamp according to claim 2, characterized in that: Both wear-resistant inserts form a semi-circular clamping force-bearing portion (112); and / or, Both wear-resistant inserts form a semi-conical flared force-bearing section (118); and / or, Both wear-resistant inserts form circular shaft hole force-bearing portions (114) for the rotation of the grippers; and / or, Both wear-resistant inserts form axial force-bearing parts (115), which are flush with or protrude from the injection molded body.

7. The electric flaring clamp according to claim 2, characterized in that: Both wear-resistant inserts form a semi-circular clamping force-bearing part (112), which includes multiple semi-circular ribs (1121) distributed axially.

8. The electric flaring clamp according to claim 1, characterized in that: The wear-resistant insert also forms a plurality of reinforcements (116) to enhance its connection strength with the injection molded body. The plurality of reinforcements (116) include at least one of axial reinforcements (116), radial reinforcements (116) and circumferential reinforcements (116), and at least some of the reinforcements (116) have axially through slots (117).

9. The electric flaring clamp according to claim 1, characterized in that: Wear-resistant inserts are made by metal powder injection molding; and / or, The wear-resistant inserts are made of stainless steel.

10. The electric flaring clamp according to claim 1, characterized in that: The electric flaring tool chuck also includes a capped pin (3), and both jaws have through holes that mate with the capped pin (3); The electric flaring clamp also includes a spring seat (4) and a screw (5). The spring seat (4) is fitted on the capped pin (3). The screw (5) is threaded to the capped pin (3) and fastens the spring seat (4) to the capped pin (3). A torsion spring (6) is fitted on the spring seat (4). The two ends of the torsion spring (6) abut against the two clamping jaws respectively. The spring seat (4) is T-shaped. The spring seat (4) includes a small diameter section near the cap end of the cap pin (3) and a large diameter section away from the cap end of the cap pin (3). The electric flaring chuck also includes a swing limiting member (7) located outside the spring seat (4). The swing limiting member (7) includes an inner radial part, an axial part and an outer radial part. A blocking part, a force-avoiding part and a reset force-receiving part are formed on the outer radial part. The reset force-receiving part is located between the operating parts of the two jaws. The outer radial part and the cap of the cap pin (3) limit the axial direction of the jaws.

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