CN215579481U

CN215579481U - Magnetism collector and electromagnetic crimping device

Info

Publication number: CN215579481U
Application number: CN202121129114.8U
Authority: CN
Inventors: 罗通; 王文伟; 李�杰; 柳泉潇潇; 欧航; 曾兵; 王智辉
Original assignee: Shenzhen Automotive Research Institute of Beijing University of Technology
Current assignee: Shenzhen Automotive Research Institute of Beijing University of Technology
Priority date: 2021-05-25
Filing date: 2021-05-25
Publication date: 2022-01-18
Anticipated expiration: 2031-05-25

Abstract

The application discloses magnetism collector and electromagnetism crimping device, including cylindrical magnetism collector body, magnetism collector body has the clearance and follows the centre bore that the axial runs through, the centre bore is including the crimping hole that is located its middle part, the clearance include certainly a terminal surface of magnetism collector body is along the first clearance of axial internal extension, along the second clearance of radial extension and certainly another terminal surface of magnetism collector body is along the third clearance of axial internal extension, the second gap connection first clearance and second clearance, first clearance, second clearance and third clearance are all connected the outer peripheral face of magnetism collector body with the hole wall face of centre bore centers on the same circumference of magnetism collector body axis, first clearance and second clearance stagger. And all gaps of the magnetic collector are respectively positioned on different planes, so that the pressing force of the high-voltage wire harness can be effectively improved.

Description

Magnetism collector and electromagnetic crimping device

Technical Field

The utility model relates to the field of new energy vehicles, in particular to an electromagnetic crimping device for crimping a high-voltage terminal of a high-voltage wire harness of a new energy vehicle and a magnetism collector of the electromagnetic crimping device.

Background

With the strong support of national policies and the continuous improvement of living standard of people, the new energy automobile industry in China enters a rapid development channel. The wire harness plays a very important role in new energy automobiles as a carrier for power conduction and signal transmission, and the high-voltage wire harness plays a critical energy transmission role in the automobile driving process.

At present, the common connection modes of the high-voltage wire harness are mainly ultrasonic welding and crimping. Ultrasonic welding bonds joints by using ultrasonic vibration, but has high process requirements, and has the defects of bubbles, insufficient strength and the like at the joints. Crimping is the use of terminals to press multiple wires together to form a connector, with electromagnetic crimping being a relatively new crimping process. The electromagnetic crimping is an efficient connection mode that the metal terminal is plastically deformed under the action of a strong magnetic field force, the terminal is deformed more uniformly by adopting the electromagnetic crimping, the crimping form is close to a round shape, and the high-voltage wire harness connector has better pressing force and consistency and higher drawing force and better electrical performance. The magnetic collector is used as a key component of the crimping device, and plays a very important role in the electromagnetic crimping effect. Chinese patent application publication No. CN 111940886 a entitled "a magnetic concentrator for improving connection effect of magnetic pulse welded joint" discloses a magnetic concentrator having a linear slot, resulting in insufficient pressing force of a high-voltage wire harness joint.

Therefore, there is a need for a new electromagnetic crimping device and a magnet collector.

SUMMERY OF THE UTILITY MODEL

The utility model provides a novel magnetic collector.

The utility model provides a magnet collector, which comprises a cylindrical magnet collector body, wherein the magnet collector body is provided with a gap and a central hole which penetrates along the axial direction, the central hole comprises a crimping hole which is positioned in the middle of the central hole, the gap comprises a first gap which extends inwards from one end surface of the magnet collector body along the axial direction, a second gap which extends along the radial direction and a third gap which extends inwards from the other end surface of the magnet collector body along the axial direction, the second gap is connected with the first gap and the second gap, the first gap, the second gap and the third gap are connected with the outer peripheral surface of the magnet collector body and the hole wall surface of the central hole, and the first gap and the second gap are staggered on the same circumference around the axis of the magnet collector body.

The centre bore still includes from the recessed sunken hole that forms of the both ends face of magnetic collector body along the axial and connect the first bell mouth in sunken hole and crimping hole, sunken jogged joint rather than corresponding the big aperture end in first bell mouth, crimping jogged joint rather than corresponding the small aperture end in first bell mouth. The current can be amplified through the first taper hole, and the pressing force of the high-voltage wire harness is effectively increased.

The sunken hole, the first taper hole, the crimping hole and the magnet collector body are coaxial.

The dimple holes are cylindrical holes.

The first gap and the third gap both pass through an axis of the magnet concentrator body.

The crimping holes are at least two and are arranged at intervals, and two adjacent crimping holes are separated by a shunting hole. Through setting up a plurality of crimping holes, can avoid the high-pressure terminal plastic deformation that takes place when the single department crimping to produce the influence to peripheral material, improve the reliability of high-pressure pencil crimping.

Each shunting hole comprises two oppositely-arranged second taper holes, small-caliber ends of the two second taper holes are respectively connected with the two crimping holes, and large-caliber ends of the two second taper holes are in butt joint.

The magnetic collector body comprises a left magnetic collector body and a right magnetic collector body, the left magnetic collector body and the right magnetic collector body are fixedly butted in the axial direction, the center hole penetrates through the left magnetic collector body and the right magnetic collector body in the axial direction, the first gap is formed between the left magnetic collector body and the right magnetic collector body, the third gap is formed between the right magnetic collector body and the left magnetic collector body, and the second gap is formed between the right magnetic collector body and the left magnetic collector body. Through setting up two magnetic collector bodies that dock mutually, can adjust the angle between first clearance and the third clearance as required, be favorable to improving the crimping effect of high-pressure pencil.

An electromagnetic crimping device comprises the magnetic collector. The electromagnetic crimping device further comprises a power supply, an energy storage capacitor and a coil. The energy storage capacitor and the coil are connected in parallel at two ends of the power supply. The coil is wound around the outer peripheral surface of the magnetic collector.

The utility model has the beneficial effects that: 1) and all gaps of the magnetic collector are respectively positioned on different planes, so that the pressing force of the high-voltage wire harness can be effectively improved. 2) The two end faces of the magnetic collector are provided with concave holes, so that a certain heat dissipation effect can be achieved.

Drawings

Fig. 1 is a schematic structural view of an electromagnetic crimping device of the present embodiment;

fig. 2 is a schematic perspective view of the magnetic collector of the present embodiment;

fig. 3 is a side view of the magnetic collector of the present embodiment;

FIG. 4 is a cross-sectional view taken along A-A of FIG. 3;

fig. 5 is a schematic structural view of the magnetic collector and the coil of the present embodiment before assembly;

fig. 6 is a schematic structural view of the magnetic collector and the coil of the present embodiment after assembly;

FIG. 7 is a cross-sectional view taken along line B-B of FIG. 6;

fig. 8 is a schematic perspective view of another embodiment of a magnetic concentrator.

Detailed Description

Reference will now be made in detail to embodiments of the present patent, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present patent and are not to be construed as limiting the present patent.

In the description of this patent, it is to be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings for the convenience of describing the patent and for the simplicity of description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the patent.

In the description of this patent, it is noted that unless otherwise specifically stated or limited, the terms "mounted," "connected," and "disposed" are to be construed broadly and can include, for example, fixedly connected, disposed, detachably connected, disposed, or integrally connected and disposed. The specific meaning of the above terms in this patent may be understood by those of ordinary skill in the art as appropriate.

As shown in fig. 1 to 7, a magnet collector is used for an electromagnetic crimping device. The magnetic collector 5 includes a magnetic collector body 7. The concentrator body 7 is a hollow cylindrical body having a gap 70 and a center hole 71 penetrating in the axial direction, which means the axial direction of the concentrator body 7. The gap 70 includes a first gap 701 extending axially inward from one end surface of the magnet collector body 7, a second gap 702 extending radially inward, and a third gap 703 extending axially inward from the other end surface of the magnet collector body 7, the second gap 702 connecting the first gap 701 and the third gap 703. The first gap 701, the second gap 702, and the third gap 703 are connected to the outer peripheral surface 72 of the magnet concentrator body 7 and the hole wall surface 710 of the center hole 71, and the first gap 701 and the third gap 703 are offset by a certain angle on the same circumference around the axis of the magnet concentrator body 7, that is, the first gap 701, the second gap 702, and the third gap 703 are on different planes, respectively.

The center hole 71 includes a pressing hole 712 located at the middle portion thereof and recessed holes 711 formed by inwardly recessing from both end surfaces of the magnet collector body 7, and first tapered holes 713 are provided between the two recessed holes 711 and the pressing hole 712. The first tapered holes 713 have a large-diameter end and a small-diameter end, the large-diameter ends of the two first tapered holes 713 are connected to the two recessed holes 711, respectively, and the small-diameter ends of the two first tapered holes 713 are connected to the corresponding crimping holes 712.

For the magnet collector, the recessed hole 711, the crimp hole 712, the first taper hole 713, and the magnet collector body 7 are coaxial. The recess hole 711 and the crimp hole 712 may be cylindrical holes. The first tapered hole 713 is a tapered hole having a large diameter outside and a small diameter inside, and the large diameter end thereof is connected to the depressed hole 711 and the small diameter end thereof is connected to the crimp hole 712, so that the first tapered hole 713 connects the depressed hole 711 and the crimp hole 712. The first gap 701 extends inward from one end surface of the magnet collector body 7, the third gap 703 extends inward from the other end surface of the magnet collector body 7, and the end of the first gap 701 and the end of the third gap 703 are connected by the second gap 702, and the inward extension is directed toward the crimp hole 712. The second gap 702 may be perpendicular to both the first gap 701 and the third gap 703. The first and

third gaps

701 and 703 are angularly offset on the same circumference about the axis of the concentrator body 7, e.g., the first and

third gaps

701 and 703 may be perpendicular. The first gap 701, the second gap 702, and the third gap 703 may be implemented by machining a slot with a certain width on the magnetic concentrator body 7.

For a magnetic concentrator, there may be only one crimp hole 712; the crimp holes 712 may be spaced apart from each other, and two adjacent crimp holes 712 are separated by the shunt holes 714. In the electromagnetic crimping, the high-voltage terminal 3 and the high-voltage wire harness 6 are placed in the center hole 71 of the magnetic collector, and each crimping hole 712 may correspond to one crimping position.

For the magnetic collector, the first tapered hole 713 can concentrate an induced current on the hole wall surface of the crimp hole 712 when performing the electromagnetic crimping work. The first gap 701, the second gap 702, and the third gap 703 can guide the flow of current, and cause the induced current to flow circumferentially through the hole wall surface of the crimp hole 712. The hole wall surface of the crimp hole 12 is a main region through which the induced current passes, and plastically deforms the high voltage terminal 3. Each clearance is on different planes, can effectively improve the packing force of high-pressure pencil when the crimping.

As shown in fig. 1 to 7, an electromagnetic crimping apparatus includes a power supply 1, an energy storage capacitor 2, a coil 4, and a magnetic collector 5, wherein the energy storage capacitor 2 and the coil 4 are connected in parallel at two ends of the power supply 1, the magnetic collector 5 is a hollow cylinder, and the coil 4 is wound on the magnetic collector 5.

The magnetic collector 5 includes a cylindrical magnetic collector body 7. The magnetic collector body 7 has a center hole 71 and a gap 70. The magnetic concentrator body 7 has a left end face and a right end face which are opposite to each other, a center hole 71 axially penetrates from the center of the left end face to the center of the right end face, and the center hole 71 is coaxial with the magnetic concentrator body 7. The center hole 71 includes a recess hole 711 formed recessed from the left and right end surfaces, respectively, and a crimp hole 712 located at the middle of the center hole 71. The caliber of the recess hole 711 is larger than the caliber of the crimp hole 712. First tapered holes 713 arranged along the axial direction are arranged between the two recessed holes 711 and the crimping holes 712, the large-caliber ends of the two first tapered holes 713 are connected with the two recessed holes 711 respectively, and the small-caliber ends of the two first tapered holes 713 are connected with the crimping holes 712.

The gap 70 includes a first gap 701 extending axially inward from the left end face of the magnet collector body 7, a second gap 702 extending radially inward, and a third gap 703 extending axially inward from the right end face of the magnet collector body 7. The first gap 701, the second gap 702, and the third gap 703 connect the outer peripheral surface 72 of the magnet collector body 7 and the hole wall surface 710 of the center hole 71, that is, the first gap 701, the second gap 702, and the third gap 703 penetrate from the outer peripheral surface 72 of the magnet collector body 7 to the hole wall surface 710 of the center hole 71 in the radial direction. The second gap 702 connects the end of the first gap 701 and the end of the third gap 703. The first and

third gaps

701 and 703 are angularly offset on the same circumference about the axis of the concentrator body 7 so that the first and

third gaps

701 and 703 are in different planes, respectively.

When the crimping device works, after the switch is closed, the power supply 1 is conducted with the energy storage capacitor 2, and the power supply 1 charges the energy storage capacitor 2 according to set energy; when the energy is full, the capacitor 2 has extremely high voltage, the switch is automatically switched off, the energy storage capacitor 2 is conducted with the coil 4, current flows through the coil 4 and forms a huge variable magnetic field around the coil 4, the coil 4 is uniformly wound on the peripheral surface of the magnetic collector 5 in a spiral line mode, the magnetic collector 5 generates correspondingly variable induced current under the action of the magnetic field and forms a variable magnetic field in the internal space, the high-voltage terminal 3 forms induced current under the action of the variable magnetic field and plastically deforms under the action of the magnetic collector to compress the high-voltage wire harness 6, and the electromagnetic compression joint of the high-voltage terminal 3 and the high-voltage wire harness 6 is completed.

In the present embodiment, two crimping holes 712 are provided at an interval, and the two crimping holes 712 are separated by the diversion hole 714. The diversion hole 714 comprises two second taper holes 715, the large-diameter ends of the two second taper holes 715 are butted, and the small-diameter ends of the two second taper holes 715 are respectively connected with the two crimping holes 712. The high-voltage terminal 3 and the high-voltage wire harness 6 are axially disposed in the center hole 71 of the magnet collector body 7, and the two crimping holes 712 correspond to two crimping positions of the high-voltage terminal 3 and the high-voltage wire harness 6, respectively. Both the first gap 701 and the third gap 703 can pass through the axis of the magnetic collector body 7. The first gap 701 and the third gap 703 may have an included angle, e.g., the first gap 701 may be perpendicular to the third gap 703.

For the electromagnetic crimping device, the power source 1 may be an industrial three-phase power source, and charges the energy storage capacitor 2. The capacity of the energy storage capacitor 2 is not lower than the preset capacity, such as not lower than 20kJ, the natural frequency can reach more than 10kHz, and when the switch is closed, energy is stored according to the set energy. The coil 42 is of a spiral structure, one end of the coil is connected with the anode of the energy storage capacitor 2, the other end of the coil is connected with the cathode of the energy storage capacitor 2, the coil 4 is wound on the peripheral surface of the magnetic collector 5, multiple layers of high-voltage insulating materials are arranged on the surface of the coil 4 and are separated from the peripheral surface of the magnetic collector 5, and the cross section of the coil 4 is usually 3mm × 8mm or other specifications. The magnet collector 5 is a cylindrical body having a center hole 71, and the center hole 71 includes a crimping hole 712 at the center and a plurality of first tapered holes 713 at the outer side of the crimping hole 712, and the high voltage terminal 3 and the high voltage wire harness 6 can be fitted into the center hole 71 and crimped at the crimping hole 712. The two ends of the magnetic collector 5 are provided with the sunken holes 711 with certain length, so that the number of winding turns of the coil 4 can be increased, and the magnetic field in the magnetic collector 5 is enhanced; and the concave hole 711 can have a good heat dissipation effect. The first tapered hole 713 functions to concentrate the current on the surface of the innermost end (small-caliber end) close to the high-voltage terminal 3, amplify the current, and perform a magnetic collection effect. A shunting hole 714 is formed between two adjacent crimping holes 712, so that the induced current can be divided into two parts, and the current can be increased, so that the pressing force of the high-voltage wire harness 6 is larger. Through setting up the reposition of redundant personnel hole 614, increased the area of contact of magnetic collector 5 with the air, had better radiating effect. The hole wall surface of the first tapered hole 713 is coated with an insulating varnish to be insulated from the high voltage terminal 3. The first 701, second 702 and third 703 gaps of the magnetic collector have a width of approximately 1mm, which can be used to guide the direction of the current. The gaps of the magnetic collector are designed on different planes, so that the problem of insufficient pressing force of the high-voltage wire harness is solved.

As shown in fig. 8, which is another embodiment of the magnetic concentrator. The magnetic collector comprises a cylindrical left magnetic collector body 74 and a cylindrical right magnetic collector body 75, the left magnetic collector body 74 and the right magnetic collector body 75 are coaxial, and in the axial direction of the magnetic collector, the right end surface 742 of the left magnetic collector body 74 and the left end surface 752 of the right magnetic collector body 75 are butted and fixed to form an integral cylindrical magnetic collector. The left magnet collector body 74 has a left center hole 741 penetrating left and right in the axial direction and a first gap 701, and the first gap 701 connects a left outer peripheral surface 743 of the left magnet collector body 74 and a left hole wall surface 744 of the left center hole 741. Right magnet collector body 75 has right center hole 751 and third gap 703 penetrating right and left in the axial direction, and this third gap 703 connects right outer peripheral surface 753 of right magnet collector body 75 and right hole wall surface 754 of right center hole 751. A second gap is formed between right end surface 742 of left concentrator body 74 and left end surface 752 of right concentrator body 75. The first gap 701 and the third gap 703 are angularly offset on the same circumference around the concentrator axis.

In the present embodiment, the right end surface 742 of the left magnetic concentrator body 74 may be perpendicular to the first gap 701. The left end surface 752 of the right concentrator body 75 may be perpendicular to the third gap 703. The axes of the magnetic collectors are the axes of the left and right

magnetic collector bodies

74 and 75. The left magnetic collector body 74 and the right magnetic collector body 75 may be fixed by external force crimping or may be fixed by a fastener. The right end surface 742 of the left magnet collector body 74 and the left end surface 752 of the right magnet collector body 75 may be spaced apart from each other to form a second gap, or an insulating layer may be provided between the left and right end surfaces to form a second gap between the left and right end surfaces.

In the embodiment, the magnetic collector is designed to be combined with two parts along the axial direction, so that the gap angle can be adjusted according to the actual condition, and the performance of the high-voltage wire harness connector is improved. Of course, the magnetic collector can also be designed to be combined together in the radial direction, and the two parts are distributed symmetrically, so that the high-voltage terminal is pressed more tightly in the welding process.

The foregoing is a more detailed description of the present invention that is presented in conjunction with specific embodiments, and the practice of the utility model is not to be considered limited to those descriptions. It will be apparent to those skilled in the art that a number of simple derivations or substitutions can be made without departing from the inventive concept.

Claims

1. A magnet collector includes a cylindrical magnet collector body having a gap and a center hole penetrating in an axial direction, the center hole including a crimping hole located at a middle portion thereof, characterized in that the gap includes a first gap extending from one end surface of the magnet collector body inward in the axial direction, a second gap extending in the radial direction, and a third gap extending from the other end surface of the magnet collector body inward in the axial direction, the second gap connecting the first gap and the second gap, the first gap, the second gap, and the third gap all connecting an outer peripheral surface of the magnet collector body and a hole wall surface of the center hole, the first gap and the second gap being staggered on the same circumference around an axis of the magnet collector body.

2. The magnet collector of claim 1 wherein said central bore further comprises a recessed bore formed by axially recessing from both end faces of said magnet collector body and a first tapered bore connecting said recessed bore and a crimp bore, said recessed bore connecting a large-diameter end of said first tapered bore corresponding thereto, said crimp bore connecting a small-diameter end of said first tapered bore corresponding thereto.

3. The concentrator of claim 2, wherein the recess hole, the first tapered hole, the crimp hole, and the concentrator body are coaxial.

4. The concentrator of claim 2, wherein the dimpled hole is a cylindrical hole.

5. The concentrator of claim 1, wherein the first gap and the third gap each pass through an axis of the concentrator body.

6. The magnetic concentrator of claim 1, wherein the crimp holes are spaced apart by at least two, and adjacent crimp holes are separated by a shunt hole.

7. The magnetic concentrator according to claim 6, wherein each of the diversion holes comprises two oppositely arranged second taper holes, small-diameter ends of the two second taper holes are respectively connected with the two crimping holes, and large-diameter ends of the two second taper holes are butted.

8. The magnet collector according to claim 1, wherein the magnet collector body includes a left magnet collector body and a right magnet collector body, the left magnet collector body and the right magnet collector body are fixed in butt joint in the axial direction, the central hole axially penetrates through the left magnet collector body and the right magnet collector body, the first gap is provided in the left magnet collector body, the third gap is provided in the right magnet collector body, and the second gap is formed between the left magnet collector body and the right magnet collector body.

9. An electromagnetic crimping device comprising the magnetic collector according to any one of claims 1 to 8.