CN210517282U - Upper cutter and lower cutter for press-fit riveting back-to-back terminals - Google Patents

Abstract

The utility model discloses an upper cutter and a lower cutter for pressing and riveting back-to-back terminals, belonging to the field of processing cutters, wherein the upper cutter and the lower cutter respectively comprise an upper blade and a lower blade; one end of the upper blade is connected with the driving device, and the other end of the upper blade is provided with a groove; one end of the lower blade is fixed with the machine tool, and the other end of the lower blade is provided with a convex part; when the driving part drives the upper blade to move downwards, the convex part of the lower blade can just extend into the groove of the upper blade; when the back-to-back terminal is processed, the metal sheet stands on the extending part, the extending part corresponds to the protruding part of the lower blade, when the upper blade is pressed downwards, the metal sheet and the side wall of the groove of the upper blade are mutually abutted, the groove wraps the metal sheet, and along with the fact that the groove and the protruding part are closer and closer, the metal sheet curls towards the extending part to press the metal wire; the upper blade moves upwards to be separated from the lower blade, and then the connection of the single back-to-back terminal and the metal wire is completed; the whole process is fast, the press-fit riveting is firm, and the wiring effect is good.

Description

Upper cutter and lower cutter for press-fit riveting back-to-back terminals

Technical Field

The utility model relates to a cutter field of processing back-to-back terminal especially relates to a cutter and lower tool that is used for pressfitting riveting back-to-back terminal.

Background

At present, a terminal assembly generally consists of a wire and a terminal connected with the wire; a stable connection structure and an electrical connection are required to be formed between the wire and the terminal, so that electrical signals such as data are transmitted to another connector butted with the terminal assembly; in order to form a firm electrical connection between the lead and the terminal.

In the connection process of the connecting terminal of the existing metal wire and the metal wire, one end of the metal wire is connected with a first terminal, and then the other end of the metal wire is connected with a second connecting terminal; the specific metal wire and the terminal are connected together through a press riveting process; the wiring terminal and the wiring method have two disadvantages, the first is low wiring efficiency, and each metal wire needs to be connected with the wiring terminal through twice press riveting; secondly, the connection between the metal wire and the wiring terminal is not stable enough; the conventional way of clinching is to make surface contact between the wire and the clinch portion, but when the wire diameter is small, the surface contact is unstable; the metal wire is not easy to slip off from the compression joint;

based on the above problems, the present inventors previously developed a back-rest type wire connection terminal for solving the above problems and filed patent applications to the national intellectual property office, the patent application numbers being: 201920376657.6, respectively; in the actual production process, the conventional cutter is found to be difficult to match with the back-to-back terminal invented by the inventor in the prior art, and based on the fact, the inventor develops a cutter matched with the prior back-to-back terminal.

SUMMERY OF THE UTILITY MODEL

To the weak point that exists among the above-mentioned technique, the utility model provides a blade for pressfitting riveting back-to-back terminal can the sheetmetal of pressfitting back-to-back terminal fast, and accurate with the wire riveting on back-to-back terminal, efficiency when improving back-to-back terminal connection wire greatly.

For a clear and concise description of the structure of the blade, the structure of the back-to-back terminals is briefly introduced, referring to fig. 1; the back-to-back terminal comprises a pair of annular fixing parts 1; the two sides of the pair of fixed parts 1 are respectively provided with an extending part; the side surface of the extension part is provided with a metal sheet which can be curled; when the metal wire is connected with the back-to-back terminals, after the metal wire is placed along the length direction of the extension part, the metal sheet is bent, and the metal wire is pressed and riveted on the extension part, so that the connection process of the metal wire and the single back-to-back terminal is completed; in the actual production process, the metal wire is a very long one, and a single metal wire is connected with a plurality of back-to-back terminals; after the connection process of the single back-to-back terminal and the metal wire is finished, pulling the metal wire to enable the part of the end part of the metal wire which is not connected to be continuously placed along the length direction of the extending part of the next back-to-back terminal, and continuously carrying out the process of upward pressure riveting and connecting the metal wire; the circulation is carried out; the tail ends of the extending parts of the back-to-back terminals are connected together through the connecting sheet 4, and when the process of connecting the metal wires by riveting the single back-to-back terminal is completed, the single back-to-back terminal can be separated from the connecting sheet 4; only need follow X axle direction promotion connection piece 4, follow Y axle direction pulling wire simultaneously, can accurately place the length direction of back-to-back terminal extension portion with the wire.

The utility model provides a cutter for pressing and riveting back-to-back terminals, which comprises an upper cutter and a lower cutter; the upper and lower cutters respectively comprise an upper blade and a lower blade; one end of the upper blade is connected with the driving device, and the other end of the upper blade is provided with a groove; one end of the lower blade is fixed with the machine tool, and the other end of the lower blade is provided with a convex part; when the driving part drives the upper blade to move downwards, the convex part of the lower blade can just extend into the groove of the upper blade; when the back-to-back terminal is processed, the metal sheet stands on the extending part, the extending part corresponds to the protruding part of the lower blade, when the upper blade is pressed downwards, the metal sheet and the side wall of the groove of the upper blade are mutually abutted, the groove wraps the metal sheet, and along with the fact that the groove and the protruding part are closer and closer, the metal sheet curls towards the extending part to press the metal wire; the upper blade moves upwards to be separated from the lower blade, and then the connection of the single back-to-back terminal and the metal wire is completed; the whole process is fast, the press-fit riveting is firm, and the wiring effect is good.

Specifically, a left upper blade and a right upper blade which are symmetrical are arranged and connected together through a first connecting block, so that the left upper blade and the right upper blade synchronously move; the thickness of connecting block is the interval between the upper left and right blade promptly, and this interval is the same with the width of two fixed parts 1 of back-to-back terminal, the length of extension portion with be not more than the width of left and right upper blade recess, when upper blade pushes down, guarantees that the sheetmetal can be wrapped up by complete recess.

Correspondingly, be equipped with the lower blade of two block symmetries on the left and right sides to through the second connecting block, link together, the thickness of second connecting block is the same with first connecting block thickness, in order to guarantee upper slitter holding-down formula, the recess of upper slitter can be aimed at to the bellying of lower blade.

According to the optimized scheme, the two sides of the left lower blade and the right lower blade are also provided with fixed blocks, each fixed block comprises a main body part and a movable part, and the main body parts are provided with sliding chutes; the movable part is arranged in the sliding groove and can only slide along the length direction of the sliding groove; one end of the movable part is connected with the main body part through a spring; when the movable part slides towards the direction close to the bottom of the sliding chute, the spring is compressed to drive the movable part to move towards the direction far away from the bottom of the sliding chute; two sides of the corresponding left and right upper blades are provided with a propping block; when the upper blade is pressed downwards, the abutting block is firstly contacted with the movable part, and when the bottom of the first groove and the bulge are mutually attached and pressed with the metal sheet, the abutting block pushes the movable block to move in the sliding groove to compress the spring; when the upper blade is separated from the lower blade, the movable block drives the back-to-back terminals to move upwards for a short distance along with the upper blade under the action of the spring, and then the extending parts are separated from the grooves; because the pressure between the metal sheet and the groove is large when the metal sheet is just separated from the groove, the most static friction force of the metal sheet and the groove is also large; the relative speed of the upper blade is high when the speed of the upper blade is suddenly changed, and the metal sheet is easily damaged due to the sudden force generated by the side wall of the groove, so that the quality of the crimping metal wire of the back-to-back terminal is influenced; the metal sheet moves upwards for a section under the action of the spring, when the metal sheet is separated from the groove, the friction force between the metal sheet and the groove is small, the relative speed of the metal sheet and the groove is also small, the metal sheet cannot be damaged in the moment of separation, and the quality of the back-to-back terminal when metal is crimped is improved.

In a more optimized scheme, a V-shaped groove is arranged at the top of the movable cutter, and the length direction of the V-shaped groove is consistent with the distance direction between the left lower blade and the right lower blade; after the back-to-back terminals are placed, the metal wires are placed along the V-shaped grooves in the movable portions of the left fixing block and the right fixing block, so that the metal wires can be placed along the extending portions of the back-to-back terminals, the simplicity is further achieved, and the operation of a crimping process is optimized.

According to a more optimized scheme, a flat groove is further formed in the middle of the movable portion, the depth direction of the flat groove is the thickness direction of the second connecting block, the length direction is perpendicular to the depth direction, and the length direction penetrates through the sliding groove; when the metal wire is pressed, the connecting sheet 4 of the back-to-back terminal is arranged in the flat groove, when the next back-to-back terminal is processed, the connecting sheet 4 is directly pushed along the length direction of the flat groove, so that the back-to-back terminal can be conveniently placed at a designated position; and the back-to-back terminals can not rotate at will, and the back-to-back terminals and the metal wires can be aligned more conveniently.

The utility model has the advantages that:

1. the connecting process of the back-to-back terminals and the metal wires is fast, the press-fit riveting is firm, and the wiring effect is good;

2. the metal sheet moves upwards for a section under the action of the spring and then is separated from the groove, the friction force between the metal sheet and the groove is small, the relative speed of the metal sheet and the groove is also small, the metal sheet cannot be damaged at the moment of separation, and the quality of the metal sheet when the back-to-back terminals are used for crimping metal is improved;

3. the connecting sheet 4 of the back-to-back terminal is arranged in the flat groove, when the next back-to-back terminal is processed, the connecting sheet 4 is directly pushed along the length direction of the flat groove, so that the back-to-back terminal can be conveniently placed at a designated position; and the back-to-back terminals can not rotate at will, and the back-to-back terminals and the metal wires can be aligned more conveniently.

Drawings

Fig. 1 is a schematic diagram of the back-to-back terminal wiring of the present invention;

FIG. 2 is a structural diagram of the upper cutter of the present invention;

FIG. 3 is a diagram of the upper track with the holding block of the present invention;

FIG. 4 is a front view of the upper blade of the present invention;

FIG. 5 is a view of the structure of the lower cutter of the present invention;

FIG. 6 is a view of the structure of the lower cutter with a fixed block of the present invention;

FIG. 7 is a view of the structure of the fixing block of the present invention;

fig. 8 is a schematic view of the back-to-back terminal of the present invention;

fig. 9 is a schematic view of the riveting process of the back-to-back terminal metal sheet in the upper blade of the present invention.

The main element symbols are as follows:

1. a fixed part 1; 2. an extension portion; 3. a metal sheet; 4. a connecting sheet 4; 5. a metal wire; 8. a spring; 61. an upper blade; 62. a first connection portion; 611. a groove; 71. a lower blade; 72. a second connecting portion; 73. a fixed block; 711. a boss portion; 732. a movable portion; 731. a main body portion; 7321. a V-shaped groove; 7322. and (4) flattening the groove.

Detailed Description

In order to make the present invention clearer, the present invention will be further described with reference to the accompanying drawings.

Referring to fig. 1, 2, 8 and 9, an upper cutter for press-riveting a back-to-back terminal includes two upper blades 61 and a connecting portion 62 connecting the two upper blades 61; the upper blade 61 is provided with a crimping end which is used for interaction when being matched with an external lower cutter; the crimping end is provided with a groove 611, and the groove 611 enables the crimping end to form a structure with a low middle part and high two sides.

When the back-to-back terminal is processed, the metal sheet 3 stands on the extension part 2, the extension part 2 corresponds to the position of the protrusion part 711 of the lower blade 71, when the upper blade 61 is pressed downwards, the metal sheet 3 and the side wall of the groove 611 of the upper blade 61 are mutually abutted, the groove 611 wraps the metal sheet 3, and the metal sheet 3 curls towards the extension part 2 along with the increasing approach of the groove 611 and the protrusion part 711 to press the metal wire 5; the upper blade 61 moves upward to separate from the lower blade 71, i.e. the connection of the single back-to-back terminal with the wire 5 is completed; specifically, the extending parts 2 on the left and right sides of the back-to-back terminal correspond to the positions of the two upper blades 61 respectively, and the position of the metal sheet 3 corresponds to the position of the groove 611 of the upper blade 61; the whole process is fast, the press-fit riveting is firm, and the wiring effect is good.

In this embodiment, the upper blades 61 further include fixed ends, and the two upper blades 61 are connected with the connecting portion 62 through the fixed ends to form a concave structure in which the upper blades 61 on both sides are protruded and the middle connecting portion 62 is recessed; and the depth of the groove 611 is smaller than the distance from the connecting part 62 to the crimping end; in this way, in the process of press-riveting the metal sheet 3, the distance between the bottom of the groove 611 and the lower cutter is always closer than that between the connecting parts 62, so that the connecting parts 62 do not contact with the lower cutter, and the full fit between the protrusion 711 of the lower blade 71 and the bottom of the groove 611 is not affected.

In the present embodiment, the pitch of the side walls of the groove 611 may be constant in width, but the metal sheet 3 may not be sufficiently curled; preferably, the width of the groove 611 is gradually reduced from the opening to the bottom, and the cross section of the bottom is a straight line with a certain length; in the process that the upper blade 61 presses the lower blade 71, the metal sheets 3 of the back-to-back terminals and the side walls of the groove 611 of the upper blade 61 are mutually abutted, and the metal sheets 3 are gradually closed along with the gradual reduction of the distance between the side walls of the groove 611; until the metal sheets 3 are adhered to each other finally, the metal wires 5 are pressed tightly; the length of the bottom of the groove 611 is the width of the back-to-back terminal extension 2; the distance between the metal sheets 3 is slowly close, so that the metal sheets 3 can be bent from the root parts of the joints of the metal sheets 3 and the extension parts 2, and the metal sheets 3 are fully bent and are combined with the metal wires 5 more tightly.

In this embodiment, the planar shape of the blade may be any shape, such as a triangle, a strip, a square, a circle, or a polygon; the blade is made of metal or alloy or nonmetal, and the process for crimping the back-to-back terminals cannot be affected as long as the hardness value reaches the standard.

In this embodiment, the two blades and the connecting portion 62 can be connected in series by bolts; and the connecting portion 62 is connected to a driving portion which drives the blade and the connecting portion 62 to move synchronously.

In this embodiment, the upper blade 61 has a thickness, and the thickness of the side walls and bottom of the groove 611 coincides with the thickness of the upper blade 61; the thickness of the side wall and the bottom of the groove 611 is not less than the length of the back-to-back terminal extension part 2; when the back-to-back terminal is crimped, the length direction of the back-to-back terminal is consistent with the distance direction of the two upper blades 61, the thickness of the side wall and the bottom of the groove 611 is not less than the length of the extending part 2 of the back-to-back terminal, and the metal sheets 3 on the extending part 2 of the back-to-back terminal can completely extend into the groove 611, so that the crimping is sufficient.

Referring to fig. 3 and 4, as an optimized solution of the previous embodiment, the upper tool for press-riveting the back-to-back terminal further includes a propping block, and the propping block is fixedly connected with the upper blade 61 and moves synchronously with the upper blade 61; when the upper blade pressing end is matched with the lower blade pressing end, the abutting part and the lower cutter are directly interacted firstly; namely, after the movable block in the lower cutter contacts with the abutting block in the upper cutter, the bottom of the groove 611 of the upper blade 61 is attached to the protruding part 711 of the lower blade 71; when the movable block is attached to the spring 8, the abutting block can push the movable block to press the spring for a certain distance; therefore, when the upper blade 61 is separated from the lower blade 71, the spring 8 provides an initial speed for the metal sheet 3 of the back-to-back terminal, so that the relative speed of the metal sheet 3 and the upper blade 61 is reduced, the acting force generated by speed breakthrough between the metal sheet 3 and the upper blade is reduced, the metal sheet 3 or the extension part 2 is effectively prevented from being damaged, and the crimping efficiency and quality are improved.

Referring to fig. 5, 8 and 9, a lower cutter for press-riveting a back-to-back terminal includes two lower blades 71 and a second connecting portion 72 connecting the two blades; the lower blade 71 is provided with a crimping end for interaction when cooperating with an external upper tool; the crimp end is provided with a protrusion 711, and the protrusion 711 forms the crimp end into a structure with a high middle and low sides.

When the back-to-back terminals are processed, since the extension 2 corresponds to the projection 711 of the lower blade 71, the projection 711 has a certain width; and the width of the protruding part 711 is not less than the length of the back-to-back terminal extension 2; so that the extension 2 is completely prevented from being on the boss 711.

Referring to fig. 6 and 7, as an optimized solution of the previous embodiment, the lower cutter further includes a fixed block 73, the fixed block 73 includes a main body portion 731 and a movable portion 732, and the main body portion 731 is fixedly connected to the lower blade 71; the main body portion 731 is provided with a sliding groove, the movable portion 732 is arranged in the sliding groove, and the spring 8 at one end is connected with the main body portion 731, so that the movable portion 732 slides along the sliding groove to stretch or compress the spring 8; when the crimping end is matched with an external lower cutter, the movable block and the upper cutter are directly interacted; when the movable block is not pressed, the movable block protrudes out of the main body portion 731, so that the upper blade 61 is preferentially contacted with the pressing portion.

As an optimized scheme of the previous embodiment, the movable block is provided with a V-shaped groove 7321, and a central axis of the V-shaped groove 7321 and a central axis of the protrusion 711 are in the same straight line; when the wire 5 is placed, placing the metal directly in the V-shaped groove 7321 ensures that the wire 5 is placed along the length of the back-to-back terminals.

As a preferable embodiment of the above embodiment, the movable portion 732 further includes a flat groove 7322, the depth direction of the flat groove 7322 is the same as the width direction of the protrusion 711, the length direction is perpendicular to the depth direction, and the length direction penetrates the movable portion 732; the flat groove 7322 is used for inserting the connecting sheet 4 of the back-to-back terminal in the length direction; when the next back-to-back terminal is replaced, the connecting sheet 4 is directly pushed along the length direction of the flat groove 7322, so that the back-to-back terminals can be conveniently placed at the designated position; and the back-to-back terminals can not rotate at will, and the back-to-back terminals and the metal wires 5 can be aligned more conveniently.

Press riveting back-to-back terminal flow:

a plurality of back-to-back terminals are connected together through a connecting sheet 4, and a long metal wire 5 is coiled together like a wire and can be pulled directly; the connecting sheet 4 of the back-to-back terminal is inserted into the flat groove 7322 of the lower cutter moving part 732, so that the extending part 2 of the back-to-back terminal corresponds to the protruding part 711 of the lower blade 71; at this time, the extending portion 2 of the back-to-back terminal is suspended, and only the connecting piece 4 contacts with the flat groove 7322; then the wire 5 is prevented from being placed in the V-shaped groove 7321 of the lower cutter movable portion 732; the upper cutter is pressed downwards, so that the metal sheets 3 of the back-to-back terminals are fully pressed and fixed with the metal wires 5 in the grooves 611 of the upper blade 61, and meanwhile, the extension parts 2 are suspended, so when the extension parts 2 are pressed downwards at the bottoms of the grooves 611 of the upper blade 61, the extension parts 2 and the connecting sheets 4 are discontinuously cracked; when the upper blade 61 leaves, the extension part 2 receives the pulling force of the metal wire 5 and continues to stay in the original position; and the riveting of the back-to-back terminals and the metal wires 5 is completed; the connecting sheet 4 in the flat groove 7322 is pushed to move the positions of the back-to-back terminals, so that the extending portion 2 of the next back-to-back terminal corresponds to the position of the protrusion 711 of the lower blade 71, and the wire 5 is pulled along the length direction of the V-shaped groove 7321, so that the wire pressing process of the next terminal can be started.

The utility model has the advantages that:

1. the connecting process of the back-to-back terminals and the metal wires is fast, the press-fit riveting is firm, and the wiring effect is good;

2. the metal sheet moves upwards for a section under the action of the spring and then is separated from the groove, the friction force between the metal sheet and the groove is small, the relative speed of the metal sheet and the groove is also small, the metal sheet cannot be damaged at the moment of separation, and the quality of the metal sheet when the back-to-back terminals are used for crimping metal is improved;

3. the connecting sheet 4 of the back-to-back terminal is arranged in the flat groove, when the next back-to-back terminal is processed, the connecting sheet is directly pushed along the length direction of the flat groove, so that the back-to-back terminal can be conveniently placed at an appointed position; and the back-to-back terminals can not rotate at will, and the back-to-back terminals and the metal wires can be aligned more conveniently.

The above disclosure is only for the specific embodiments of the present invention, but the present invention is not limited thereto, and any changes that can be made by those skilled in the art should fall within the protection scope of the present invention.

Claims (10)

1. An upper cutter for press-riveting a back-to-back terminal is characterized by comprising two upper blades and a connecting part for connecting the two upper blades; the upper blade is provided with a first crimping end which is used for interacting with an external lower cutter when being matched; the first crimping end is provided with a groove, and the groove enables the first crimping end to form a structure with a low middle part and high two sides.

2. The upper tool for press-riveting back-to-back terminals according to claim 1, wherein the upper blades further comprise fixed ends, and the two upper blades are connected with the connecting parts through the fixed ends to form a concave structure with the upper blades on two sides protruding and the middle connecting part sinking; and the depth of the groove is less than the distance from the connecting part to the first crimping end.

3. The upper tool for press-riveting a back-to-back terminal according to claim 1, wherein the width of the groove is gradually reduced from the opening to the bottom, and the cross section of the bottom is a straight line having a certain length.

4. The upper tool for press-riveting back-to-back terminals according to claim 1, wherein the upper blade has a thickness, and the thickness of the side walls and bottom of the groove is the same as the thickness of the upper blade; and the thickness of the side wall and the bottom of the groove is not less than the length of the extending part of the back-to-back terminal.

5. The upper tool for press-riveting back-to-back terminals according to any one of claims 1 to 4, further comprising a holding block fixedly connected with the upper blade and moving synchronously with the upper blade; and when the first crimping end is matched with the external lower cutter, the abutting part directly interacts with the lower cutter.

6. A lower cutter for press-riveting a back-to-back terminal is characterized by comprising two lower blades and a second connecting part for connecting the two blades; the lower blade is provided with a second crimping end which is used for interacting with an external upper cutter when being matched; the second crimping end is provided with a bulge, and the bulge enables the second crimping end to form a structure with a high middle part and low two sides.

7. The bottom tool for press-riveting back-to-back terminals according to claim 6, wherein the projections have a width; and the width of the protruding part is not less than the length of the back-to-back terminal extension part.

8. The lower tool for press-riveting back-to-back terminals according to claim 6 or 7, further comprising a fixing block, wherein the fixing block comprises a main body part and a movable part, and the main body part is fixedly connected with the lower blade; the main body part is provided with a sliding chute, the movable part is arranged in the sliding chute, and a spring at one end is connected with the main body part to form a structure that the movable part stretches or compresses the spring along the sliding chute in a sliding way; and when the second crimping end is matched with the external lower cutter, the movable block and the upper cutter are directly interacted firstly.

9. The bottom tool for press-fit riveting of back-to-back terminals as claimed in claim 8, wherein the movable block is provided with a V-shaped groove, and the central axis of the V-shaped groove is collinear with the central axis of the boss.

10. The bottom tool for press-riveting a back-to-back terminal according to claim 8, wherein the movable portion is further provided with a flat groove, the depth direction of the flat groove is the same as the width direction of the protrusion, the length direction is perpendicular to the depth direction, and the length direction penetrates through the movable portion; the length direction of the flat groove is used for inserting the connecting part of the back-to-back terminal.

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