CN215600719U - Pressure head mechanism and welding system - Google Patents

Abstract

The utility model discloses a pressure head mechanism and welding system, pressure head mechanism includes the base, two hold down parts, elastomeric element and locating component, wherein, two hold down the part symmetry and set up in the removal cavity of base, elastomeric element connects between two hold down parts, locating component sets up the top at the base, two pressure heads that hold down the part stretch out from removing the cavity, this pressure head mechanism passes through locating component location electric connector, two pressure heads extend to the electric connector in electric connector location in-process, thereby elastomeric element is controlled to reset two parts that compress down makes the pressure head compress tightly the corresponding shell fragment in the electric connector, later weld the electric connector again. This pressure head mechanism can compress tightly the shell fragment and laminate completely through elastomeric element before the electric connector welding, can guarantee follow-up welding effect and quality, is showing to have improved the easy rosin joint of welding, empty solder scheduling problem, has improved production efficiency and yield.

Description

Pressure head mechanism and welding system

Technical Field

The utility model relates to the technical field of power electronics, in particular to a pressure head mechanism and a welding system.

Background

The electric connector is formed by assembling and welding the elastic sheet, the injection molded metal shell and the insulating rubber core. The production technology of the prior electric connector can not ensure that the two parts can be completely attached after the elastic sheet and the metal shell are assembled, so that the problems of insufficient solder, empty solder and the like are easily caused after the two parts are welded, the function of the elastic sheet is failed, and the production efficiency and the production yield of the electric connector are lower.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides a pressure head mechanism and a welding system, which can press and completely attach the elastic sheet to the housing before the electric connector is welded, can ensure the subsequent welding effect and quality, remarkably improve the problems of easy cold joint, empty welding and the like of welding, and improve the production efficiency and yield.

In a first aspect, an embodiment of the present invention provides a ram mechanism, including:

a base having a mobile cavity;

the two pressing parts are symmetrically arranged at two opposite sides in the movable cavity;

the elastic component is arranged in the moving cavity and is connected between the two pressing components;

the positioning assembly is arranged above the base and used for positioning the electric connector;

the pressing part comprises two pressing heads, the pressing heads extend out of the moving cavity and extend into the electric connector, and the elastic part is controlled to reset the two pressing parts, so that the pressing heads press corresponding elastic sheets in the electric connector.

Furthermore, the pressing part further comprises a contact block, and the contact block is arranged on one side, facing the elastic sheet, of the pressing head in a protruding mode.

Furthermore, the base also comprises two oppositely arranged moving through holes, and the two moving through holes are communicated with the moving cavity;

the pressure head mechanism further comprises two push rods, the push rods penetrate through the corresponding moving through holes to be connected with the corresponding pressing parts, and the two push rods are controlled to push the two pressing parts to move relatively, so that gaps are formed between the two sides of the pressure head and the elastic sheets and the connecting terminals of the electric connector respectively.

Further, the pressing component also comprises a pressing head main body which is arranged in the moving cavity in a sliding manner;

the ram comprises a first portion and a second portion connected, the first portion is connected between the ram body and the second portion, and the second portion is located outside the first portion;

the thickness of the first portion is larger than that of the second portion, and the distance between the two second portions, which are oppositely arranged, of the two pressing parts is larger than that between the two first portions, which are oppositely arranged.

Further, the positioning assembly comprises:

the two first positioning parts are symmetrically arranged on the base and correspondingly positioned on the pressing part, each first positioning part comprises a first positioning block, and the first positioning blocks extend between the two pressing heads of the corresponding pressing part;

the two second positioning parts are symmetrically arranged on the base and positioned on two opposite sides of the two first positioning parts, and second positioning blocks are arranged on the second positioning parts in an upward protruding mode;

the two first positioning blocks and the two second positioning blocks are inserted between the shell and the insulating body of the electric connector to position the electric connector.

Furthermore, the positioning assembly further comprises two third positioning parts which are respectively arranged on the corresponding second positioning parts and are positioned on one side of the second positioning block back to the pressure head, and the third positioning parts are attached to and positioned on the side wings of the shell of the electric connector.

Further, the distance between the third positioning component and the second positioning block is larger than the thickness of the shell.

Further, pressure head mechanism still includes the top fixing base, including the decurrent chamber and a plurality of and of holding the welding hole of chamber side direction intercommunication, the top fixing base sets up on the base, it is in to hold the chamber lock the outside of electric connector, a plurality of welding point positions of electric connector are respectively from corresponding the welding hole exposes.

Further, the pressure head mechanism further includes:

the first driving piece is arranged on one side of the base;

and one end of the top pressing rod is connected with the first driving piece, the other end of the top pressing rod extends into the accommodating cavity, and the first driving piece drives the top pressing rod to move towards the inside of the accommodating cavity so as to tightly press the electric connector.

In a second aspect, embodiments of the present invention provide a welding system, comprising:

a frame;

the ram mechanism of the first aspect, the ram mechanism being rotatably coupled to the frame;

the second driving piece is fixed on the rack and connected with the pressure head mechanism, and the second driving piece is configured to drive the pressure head mechanism to rotate.

The pressure head mechanism of this embodiment can compress tightly the shell fragment and laminate completely through elastomeric element before the electric connector welding, can guarantee follow-up welding effect and quality, is showing to have improved the easy rosin joint of welding, empty problem such as weld, has improved production efficiency and yield.

Drawings

The above and other objects, features and advantages of the present invention will become more apparent from the following description of the embodiments of the present invention with reference to the accompanying drawings, in which:

FIG. 1 is a schematic structural diagram of a ram mechanism of an embodiment of the present invention;

FIG. 2 is an exploded schematic view of a ram mechanism of an embodiment of the present invention;

FIG. 3 is a schematic view of a portion of the ram mechanism of an embodiment of the present invention;

FIG. 4 is a cross-sectional view of a ram mechanism of an embodiment of the present invention;

fig. 5 is a schematic view of an electrical connector of an embodiment of the present invention secured to a ram mechanism;

FIG. 6 is a schematic view of an electrical connector of an embodiment of the present invention secured at another angle to a ram mechanism;

fig. 7 is a cross-sectional view of an electrical connector of an embodiment of the present invention secured to a ram mechanism;

FIG. 8 is a schematic structural view of a top mounting bracket according to an embodiment of the present invention;

FIG. 9 is a further structural schematic of the ram mechanism of an embodiment of the present invention;

fig. 10 is a schematic structural view of a welding system according to an embodiment of the present invention.

Description of reference numerals:

1-a base; 11-moving the chamber; 12-moving the through-hole; 2-a pressing part; 21-pressure head; 211-a first portion; 212-a second portion; 22-a contact block; 23-a ram body; 3-an elastic member; 4-a positioning assembly; 41-a first positioning member; 411-first positioning block; 42-a second positioning member; 421-a second positioning block; 43-a third positioning member; 5-a push rod; 6-top fixing seat; 61-a containment chamber; 62-welding holes; 7-a first driving member; 8-a top compression bar; 9-a frame; 10-a second driving member; a-an electrical connector; a1-shrapnel; a 2-connection terminal; a 3-metal housing; a 4-insulating body; a5-lateral wings of the shell.

Detailed Description

The present invention will be described below based on examples, but the present invention is not limited to only these examples. In the following detailed description of the present invention, certain specific details are set forth. It will be apparent to one skilled in the art that the present invention may be practiced without these specific details. Well-known methods, procedures, components and circuits have not been described in detail so as not to obscure the present invention.

Further, those of ordinary skill in the art will appreciate that the drawings provided herein are for illustrative purposes and are not necessarily drawn to scale.

Meanwhile, it should be understood that, in the following description, a "circuit" refers to a conductive loop constituted by at least one element or sub-circuit through electrical or electromagnetic connection. When an element or circuit is referred to as being "connected to" another element or element/circuit is referred to as being "connected between" two nodes, it may be directly coupled or connected to the other element or intervening elements may be present, and the connection between the elements may be physical, logical, or a combination thereof. In contrast, when an element is referred to as being "directly coupled" or "directly connected" to another element, it is intended that there are no intervening elements present.

Unless the context clearly requires otherwise, throughout the description, the words "comprise", "comprising", and the like are to be construed in an inclusive sense as opposed to an exclusive or exhaustive sense; that is, what is meant is "including, but not limited to".

In the description of the present invention, it is to be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.

Unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are intended to be inclusive and mean that, for example, they may be fixedly connected or detachably connected or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Fig. 1 to 4 are schematic structural views of the ram mechanism of the present embodiment. The pressure head mechanism is used for fixing the parts of the electric connector before the parts of the electric connector are welded, so that cold joint and empty joint generated during subsequent welding can be avoided, and the production efficiency and the production yield of the electric connector are improved. The utility model provides a pressure head mechanism is to be that laminating of welding between electric connector's shell fragment and the metal casing is fixed, improves the welding yield between the two from this, and then improves the function of shell fragment.

As shown in fig. 1-4, the ram mechanism includes a base 1, two pressing members 2, an elastic member 3, and a positioning assembly 4. Wherein the base 1 comprises a moving cavity 11 with an upward opening, and each pressing part 2 comprises two pressing heads 21, as shown in fig. 2. The two pressing parts 2 are symmetrically arranged in the moving cavity 11 and are positioned at two opposite sides of the moving cavity 11, all the pressing heads 21 extend out of the moving cavity 11, and the two pressing parts 2 can slide in the moving cavity 11 and drive the pressing heads 21 to move under the control of the two pressing parts 2. The positioning component 4 is arranged above the base 1, and the positioning component 4 is used for positioning the electric connector A. The elastic component 3 is arranged in the moving cavity 11, and the elastic component 3 is connected between the two pressing components 2. After the electric connector A is positioned by the positioning assembly 4, all the pressure heads 21 of the two pressing parts 2 extend into the electric connector A, and each pressure head 21 is arranged opposite to one elastic sheet A1 respectively. The elastic component 3 is controlled to move the two pressing components 2 back to enable each pressure head 21 to press the corresponding elastic sheet A1 in the electric connector A, so that the elastic sheet A1 is attached to the metal shell A3, and then the elastic sheet A1 and the metal shell A3 are welded together, and cold welding or empty welding can be avoided.

In particular, the base 1 comprises a movement chamber 11 open upwards, as shown in fig. 2. The length of the moving cavity 11 is greater than the sum of the lengths of the two pressing members 2, so that the two pressing members 2 have a sufficient moving distance therebetween.

In an alternative embodiment, the moving chamber 11 has an i-shaped configuration. The top of base 1 is provided with four lugs, and four lugs are located four corners of base 1 respectively, form the cross logical groove between four lugs, the cross logical groove with remove cavity 11 intercommunication. Further, the base 1 further comprises two oppositely arranged moving through holes 12, and the two moving through holes 12 are communicated with the moving cavity 11. In the present application, two moving through holes 12 are disposed on two sidewalls of the moving cavity 11 along the length direction.

The pressing member 2 includes a pressing head body 23, two pressing heads 21, and two contact blocks 22, as shown in fig. 2. The pressure head main body 23 is arranged in the movable cavity 11 in a sliding mode, and the elastic component 3 is connected between the two pressure head main bodies 23 to drive the two pressure head main bodies 23 to move back to back. The shape of the pressure head main body 23 is matched with that of the movable cavity 11. Two pressing heads 21 in the same pressing component 2 are vertically arranged on the top of the pressing head main body 23 and are positioned at one side close to the other pressing head main body 23, and the two pressing heads 21 extend out of the upper part of the moving cavity 11, as shown in fig. 3. Preferably, the two indenters 21 are spaced apart. Two contact blocks 22 are respectively protruded on the free end of the corresponding press head 21, and the contact blocks 22 extend towards the side back to the other press head main body 23, so that the contact blocks 22 are arranged towards the corresponding elastic sheets a1 when the electric connector is positioned on the base 1. Two contact blocks 22 in the same pressing part 2 can be simultaneously arranged towards two elastic sheets a1 on the same side in the electrical connector, so that one pressing part 2 can simultaneously press two elastic sheets a 1.

In an alternative embodiment, the pressing head main body 23 is a convex structure, the pressing head main body 23 is arranged in the i-shaped moving cavity 11, and the convex structure is matched with the i-shaped moving cavity 11 to limit the moving range of the pressing head main body 23. The two pressing head main bodies 23 are oppositely arranged in the I-shaped moving cavity 11, so that the relative moving distance of the pressing head 21 between the two pressing head main bodies 23 and the two pressing parts 2 can be limited.

When the two pressing head main bodies 23 are controlled to move towards each other, the pressing heads 21 on the two pressing head main bodies 23 are driven to move towards each other, so that the distance between the pressing heads 21 above the two pressing head main bodies 23 is reduced, and all the pressing heads 21 can be inserted into the electric connector A. When the electrical connector a is fixed on the outside of the press ram 21, the contact blocks 22 on all the press rams 21 face the welding point between one elastic sheet a1 and the metal shell A3. When the external force is removed, the elastic component 3 pushes the two pressing components 2 to reset under the action of the self elastic force, and at the moment, the pressing head 21 moves towards the corresponding elastic sheet A1 until the corresponding elastic sheet A1 is pressed and attached to the metal shell A3.

The contact block 22 can be made of soft material, and the contact block 22 is in direct contact with the elastic sheet A1 when being pressed, so that the function failure caused by crushing the elastic sheet A1 can be avoided.

In an alternative embodiment, the ram 21 includes a first section 211 and a second section 212 that are connected, as shown in FIG. 2. Wherein the first portion 211 is connected between the ram body 23 and the second portion 212. In the present application, the thickness of the first portion 211 is greater than the thickness of the second portion 212, and the outer side of the second portion 212 coincides with the outer side of the first portion 211, so that the first portion 211 and the second portion 212 form a step on the side facing the other pressing part 2. That is, between the two pressing heads 21 oppositely disposed in the two pressing members 2, the interval between the two second portions 212 is always larger than the interval between the two first portions 211.

The width between the two second portions 212 can house the insulating body a4 inside the electrical connector a, so that in any case the ram 21 does not collide with the insulating body a4, preventing damage to the electrical connector a. When the two pressing members 2 are controlled to move towards each other, the first portions 211 of the two pressing members 2 abut, and the distance between the second portions 212 of the two pressing members 2 is minimized. The distance is larger than the thickness of the insulating body A4 of the electric connector A, and the distance between the insulating body A4 and the two sides of the metal shell is larger than the thickness of the pressure head 21. At this time, the insulating body a4 of the electrical connector a is inserted from top to bottom between the second parts 212 of the two pressing members 2, and a gap is formed between any one of the second parts 212 and the corresponding spring pieces of the left and right insulating bodies a4 and the metal shell, so that damage to the electrical connector a when the electrical connector a is fixed can be avoided. When the two pressing parts 2 move away from each other, the distance between the second parts 212 of the two pressing parts 2 is gradually increased, and the distance between the second part 212 and the corresponding elastic sheet is gradually reduced until the pressing fit is realized.

The pressing head mechanism further comprises two push rods 5, and the two push rods 5 penetrate through the corresponding moving through holes 12 to be connected with the corresponding pressing head main bodies 23 of the pressing parts 2 respectively, as shown in fig. 4. The two push rods 5 are convenient for manual operation to push the two pressing parts 2 to move oppositely. Specifically, the outer end of the push rod 5 is larger than the aperture of the moving through hole 12, so that the operation is convenient.

The positioning component 4 is arranged above the base 1, the positioning component 4 is arranged around the movable cavity 11, and the positioning component 4 is used for positioning the electric connector a, as shown in fig. 1, 5 and 6. The pressing head 21 of the pressing component 2 is positioned in the area surrounded and formed by the positioning component 4 after extending out of the moving cavity 11. In an optional embodiment, the positioning component 4 is disposed in a cross-shaped through slot formed at the top of the base 1, and is used for ensuring the relative position between the positioning component 4 and the moving cavity 11, so that the positioning component 4 can position the electrical connector, and simultaneously, the contact block of the pressure head 21 can be disposed opposite to the corresponding elastic piece of the electrical connector.

Specifically, the positioning assembly 4 includes two first positioning members 41, two second positioning members 42, and two third positioning members 43, as shown in fig. 2. The two first positioning components 41 are symmetrically disposed on the base 1, each first positioning component 41 is correspondingly disposed on one pressing component 2, and the two second positioning components 42 are symmetrically disposed on the base 1 and disposed on two sides of the two first positioning components 41. Preferably, the two first positioning members 41 and the two second positioning members 42 are located within the cross-shaped through slot. The two first positioning parts 41 are located on two sides of the length direction of the moving cavity 11, and respectively cover the corresponding partial structures of the pressing part 2, so that the pressing part 2 is prevented from extending out from the upper side of the moving cavity 11 to influence the subsequent fixation of the elastic sheet. The two second positioning members 42 are located on both sides in the width direction of the moving chamber 11. The pressing heads 21 of the two pressing members 2 protrude into the area surrounded by the two first positioning members 41 and the two second positioning members 42.

Specifically, the first positioning member 41 includes a first positioning block 411, as shown in fig. 2. The first positioning block 411 is located inside the first positioning member 41 and extends upward. That is, the first positioning block 411 is vertically connected to the first positioning member 41. The first positioning block 411 is extended and arranged between the two pressing heads 21 of the corresponding pressing part 2, as shown in fig. 1. The two first positioning blocks 411 of the two first positioning members 41 are symmetrically arranged, and both sides of the metal shell of the electrical connector a in the thickness direction are positioned outside the two first positioning blocks 411, as shown in fig. 5 and 6.

The second positioning component 42 is provided with a second positioning block 421 in an upward protruding manner, as shown in fig. 2. The second positioning block 421 is disposed on a side of the second positioning component 42 close to the other second positioning component 42. The width of the second positioning block 421 is smaller than the thickness of the electrical connector. The two second positioning blocks 421 of the two second positioning components 42 are symmetrically arranged, and two sides of the metal shell of the electrical connector a along the width direction are positioned outside the two second positioning blocks 421, as shown in fig. 5 and 6. Thereby, the electrical connector a is circumferentially positioned by the two first positioning blocks 411 and the two second positioning blocks 421.

In an alternative embodiment, the outer side of the first positioning block 411 is formed with a step, and the height of the step is the same as the height of the second positioning member 42, so that the bottom of the electrical connector a abuts against the top of the second positioning member 42.

The two third positioning members 43 are symmetrically disposed and fixed to the corresponding second positioning members 42, as shown in fig. 1. Specifically, the third positioning component 43 is located on a side of the second positioning block 421 facing away from the pressing head 21. Wherein the side surface of the third positioning component 43 is perpendicular to the top surface of the second positioning component 42, and the side surface is used for being positioned in a manner of fitting with the shell side wing a5 of the electrical connector a, as shown in fig. 6. Preferably, the third positioning member 43 is an L-shaped plate.

The distance between the third positioning component 43 and the second positioning block 421 is greater than the thickness of the metal casing A3, so that the electrical connector a can be positioned outside the second positioning block 421 without affecting the positioning of the casing shoulder a5 by the third positioning component 43.

Before the electric connector A is welded, two push rods 5 simultaneously apply opposite thrust to the two pressing parts 2, and the two pressing parts 2 drive the pressing heads 21 to move oppositely, so that the pressing heads 21 of the two pressing parts 2 are close to each other; at this time, the electrical connector a is positioned outside the two first positioning blocks 411 and the two second positioning blocks 421, and the bottom of the housing side wing a5 of the electrical connector a abuts against the side surface of the third positioning member 43, and the bottom of the electrical connector a abuts against the top of the second positioning member 42, so as to achieve positioning, as shown in fig. 7. In the positioning process, all the pressing heads 21 extend into the electric connector a and are respectively arranged opposite to the corresponding elastic sheets. After the positioning is finished, the external force applied to the two push rods 5 is removed, the elastic part 3 resets under the action of the self elastic force, opposite resetting force is applied to the two pressing parts 2 to enable the pressing parts 2 to reset, and the pressing parts 2 drive the pressing heads 21 to move towards the corresponding elastic sheets A1 when resetting until the corresponding elastic sheets A1 are pressed. After the elastic sheet a1 is pressed, the elastic sheet a1 of the electrical connector a is welded.

In an alternative embodiment, the ram mechanism further comprises a top mount 6, as shown in fig. 8. The top fixing base 6 comprises a downwardly open accommodating cavity 61 and a plurality of welding holes 62 which are communicated with the accommodating cavity 61 laterally. When the top fixing seat 6 is arranged on the base 1, the accommodating cavity 61 is buckled at the outer side of the electric connector A. At this time, the plurality of soldering points of the electrical connector a are respectively exposed from the corresponding soldering holes 62, so that the soldering can be conveniently performed at the soldering points of the electrical connector through the soldering holes 62 from the outside of the ram mechanism.

The ram mechanism further comprises a first drive member 7 and a top ram 8, as shown in figure 9. Wherein, first driving piece 7 sets up one side of base 1, top depression bar 8's one end with first driving piece 7 is connected, and the other end stretches into in the chamber 61 holds. The first driving member 7 can drive the top pressing rod 8 to move along the height direction. When the first driving member 7 drives the tail end of the top pressing rod 8 to move towards the inside of the accommodating cavity 61, the electric connector A is pressed from the top of the electric connector A, and the electric connector A can be prevented from shaking to influence welding precision. Preferably, the first driver 7 may be a linear cylinder.

The pressure head mechanism of this embodiment includes the base, two compress tightly the part, elastomeric element and locating component, wherein, two compress tightly the removal cavity that the part symmetry set up at the base, elastomeric element connects between two compress tightly the part, locating component sets up the top at the base, two pressure heads that compress tightly the part stretch out from removing the cavity, this pressure head mechanism passes through locating component location electric connector, two pressure heads extend to in the electric connector location in-process, thereby elastomeric element is controlled to reset two compress tightly the part and make the pressure head compress tightly the corresponding shell fragment in the electric connector, later weld the electric connector again. This pressure head mechanism can compress tightly the shell fragment and laminate completely through elastomeric element before the electric connector welding, can guarantee follow-up welding effect and quality, is showing to have improved the easy rosin joint of welding, empty solder scheduling problem, has improved production efficiency and yield.

Fig. 10 is a schematic structural view of the welding system of the present embodiment. As shown in fig. 10, the welding system includes a frame 9, a ram mechanism, and a second driver 10. The structure of the pressing head mechanism is the same as that of the pressing head mechanism of the above embodiment, and the description is omitted here. The pressure head mechanism is rotatably connected to the frame 9 through a support. Second driving piece 10 is fixed in on the frame 9, just the drive shaft of second driving piece 10 with pressure head mechanism fixed connection, from this second driving piece 10 drive pressure head mechanism rotates to the position of the welding point position of exposure in the regulation follow welding hole 62, so that better adaptation welding mechanism welds the electric connector. Preferably, the second driver 10 may be a motor or the like.

The pressure head mechanism in the welding system of this embodiment can compress tightly the shell fragment and laminate completely through elastomeric element before the electric connector welding, can guarantee follow-up welding effect and quality, is showing to have improved the easy rosin joint of welding, empty solder scheduling problem, has improved production efficiency and yield.

The above description is only an embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A ram mechanism, comprising:

a base (1) having a mobile cavity (11);

the two pressing parts (2) are symmetrically arranged on two opposite sides in the movable cavity (11);

the elastic component (3) is arranged in the moving cavity (11), and the elastic component (3) is connected between the two pressing components (2);

the positioning component (4) is arranged above the base (1), and the positioning component (4) is used for positioning the electric connector (A);

wherein, the pressing component (2) comprises two pressing heads (21), the pressing heads (21) extend out of the moving cavity (11) and extend into the electric connector (A), and the elastic component (3) is controlled to reset the two pressing components (2) so that the pressing heads (21) press corresponding elastic sheets (A1) in the electric connector (A).

2. A ram mechanism according to claim 1, characterized in that the pressing member (2) further comprises a contact block (22), and the contact block (22) is arranged on the side of the ram (21) facing the elastic sheet (a1) in a protruding manner.

3. A head mechanism according to claim 1, characterized in that said base (1) further comprises two oppositely disposed through-moving holes (12), both said through-moving holes (12) being in communication with said moving cavity (11);

the pressure head mechanism further comprises two push rods (5), the push rods (5) penetrate through the corresponding moving through holes (12) and are connected with the corresponding pressing parts (2), and the push rods (5) are controlled to push the two pressing parts (2) to move relatively, so that gaps are formed between two sides of the pressure head (21) and the elastic sheets (A1) and the connecting terminals (A2) of the electric connector (A) respectively.

4. A head mechanism according to claim 3, characterized in that said pressing member (2) further comprises a head body (23) slidingly arranged inside said moving chamber (11);

the ram (21) comprises a first portion (211) and a second portion (212) connected, the first portion (211) being connected between the ram body (23) and the second portion (212), and the second portion (212) being located outside the first portion (211);

wherein the thickness of the first part (211) is larger than that of the second part (212), and the distance between the two second parts (212) which are oppositely arranged by the two pressing parts (2) is larger than that between the two first parts (211) which are oppositely arranged.

5. A head mechanism according to claim 1, characterized in that said positioning assembly (4) comprises:

the two first positioning components (41) are symmetrically arranged on the base (1) and correspondingly positioned on the pressing component (2), each first positioning component (41) comprises a first positioning block (411), and each first positioning block (411) is arranged between the two pressing heads (21) of the corresponding pressing component (2) in an extending mode;

the two second positioning parts (42) are symmetrically arranged on the base (1) and are positioned at two opposite sides of the two first positioning parts (41), and second positioning blocks (421) are arranged on the second positioning parts (42) in an upward protruding mode;

wherein the two first positioning blocks (411) and the two second positioning blocks (421) are inserted between a metal shell (A3) and an insulating body (A4) of the electrical connector (A) to position the electrical connector (A).

6. The ram mechanism according to claim 5, characterized in that the positioning assembly (4) further comprises two third positioning members (43) respectively arranged on the corresponding second positioning members (42) and located on a side of the second positioning block (421) facing away from the ram (21), wherein the third positioning members (43) are positioned in abutment with the housing side wings (A5) of the electrical connector (A).

7. A ram mechanism according to claim 6, characterized in that the distance between the third positioning member (43) and the second positioning block (421) is greater than the thickness of the metal casing (A3).

8. The ram mechanism according to claim 1, characterized in that the ram mechanism further comprises a top fixing seat (6) which comprises a downward-opening accommodating cavity (61) and a plurality of welding holes (62) communicated with the accommodating cavity (61) laterally, the top fixing seat (6) is arranged on the base (1), the accommodating cavity (61) is buckled on the outer side of the electric connector (A), and a plurality of welding points of the electric connector (A) are respectively exposed from the corresponding welding holes (62).

9. The ram mechanism of claim 8, further comprising:

the first driving piece (7) is arranged on one side of the base (1);

top depression bar (8), the one end of top depression bar (8) with first driving piece (7) are connected, and the other end stretches into hold in chamber (61), first driving piece (7) drive top depression bar (8) to hold chamber (61) inside removal in order to compress tightly electric connector (A).

10. A welding system, comprising:

a frame (9);

a head mechanism according to any one of claims 1 to 9, rotatably connected to the frame (9);

the second driving piece (10) is fixed on the rack (9), the second driving piece (10) is connected with the pressure head mechanism, and the second driving piece (10) is configured to drive the pressure head mechanism to rotate.

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