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CN-122026171-A - Wire harness connecting assembly for new energy automobile

CN122026171ACN 122026171 ACN122026171 ACN 122026171ACN-122026171-A

Abstract

The invention relates to the technical field of new energy automobile cables, and in particular discloses a wire harness connecting assembly for a new energy automobile, which comprises the following components: connector, buckle button, cable, protective housing and protection machanism, the buckle button sets up in the top of connector, and the cable sets up in the bottom of connector, and the protective housing cup joints in the outer wall of cable, and protection machanism sets up in the inner chamber of protective housing. The device integrates dual functions of dragging tension protection and overheat temperature protection, covers two types of core safety risks in the electric connection process, and the core triggering is realized by pure mechanical linkage, and is assisted by an electric structure, so that the device has high protection reliability, prolongs the service life of equipment while ensuring the electric connection safety, and solves the problems of single protection, no automatic separation function and easy initiation of safety accidents and equipment damage of the existing cable.

Inventors

  • JIANG YING
  • LI AQIN
  • JIANG ZHIQING
  • HOU LILI

Assignees

  • 常州威正达汽车部件有限公司

Dates

Publication Date
20260512
Application Date
20260410

Claims (10)

  1. 1. A wire harness connection assembly for a new energy automobile, comprising: a connector (1); the buckling button (2) is arranged at the top end of the connector (1); the cable (3) is arranged at the bottom end of the connector (1); The protection box (4) is arranged at the bottom end of the connector (1), and the protection box (4) is sleeved on the outer wall of the cable (3); the protection mechanism (7) is arranged in the inner cavity of the protection box (4); the protection mechanism (7) comprises: The left end and the right end of the pull rod (71) are respectively and slidably connected with the middle parts of the left side and the right side of the protective box (4) in an adaptive manner, the left end and the right end of the pull rod (71) are respectively and slidably extended out of the left side and the right side of the protective box (4), a positioning hole (72) is formed in the middle part of the pull rod (71), and the outer wall of the cable (3) is slidably connected with the inner cavity of the positioning hole (72) in an adaptive manner; the pretightening force adjusting assembly is arranged on the outer wall of the pull rod (71); the baffle (75) is arranged at the right part of the outer wall of the pull rod (71); The second spring (76) is sleeved on the right side of the outer wall of the pull rod (71), one end of the second spring (76) is clamped on the outer wall of the baffle plate (75), and the other end of the second spring (76) is clamped on the inner wall of the protective box (4); the separation assembly is arranged on the outer wall of the connector (1); The temperature monitoring assembly is arranged in the inner cavity of the protective box (4).
  2. 2. The wire harness connection assembly for a new energy automobile according to claim 1, wherein the pretension adjustment assembly comprises: The pre-tightening piece (73), the pre-tightening piece (73) is connected to the left side of the outer wall of the pull rod (71) in a threaded manner; The first spring (74), first spring (74) cup joints in the outer wall left side of pull rod (71), the one end joint of first spring (74) is in the outer wall left side of protective housing (4), the opposite side of first spring (74) is contacted with pretension piece (73).
  3. 3. The wire harness connection assembly for a new energy automobile according to claim 2, wherein the separation assembly comprises: One end of the pull rope (77) is arranged on the right side of the pull rod (71), and the other end of the pull rope (77) is arranged on the right side of the bottom end of the buckle button (2); The fixed pulley (78), the fixed pulley (78) is arranged at the top end of the right side of the protective box (4), and the pull rope (77) is lapped on the outer wall of the fixed pulley (78); And the pushing-away assembly is arranged on the outer wall of the connector (1).
  4. 4. A harness connection assembly for a new energy automobile according to claim 3, wherein the pretightening force adjusting assembly is used for matching rated bearing tension of the electric connection cable (3) to set a drag protection triggering threshold value, and the pretightening degree of the first spring (74) is adjusted by rotating the pretightening piece (73) to axially move along the outer wall of the pull rod (71) so as to complete threshold value calibration.
  5. 5. The wire harness connection assembly for a new energy automobile as claimed in claim 4, wherein the push-away assembly comprises: The telescopic frame (79) is slidably arranged at the top of the right side of the protective box (4), and the left side of the telescopic frame (79) slidably extends into the inner cavity of the protective box (4); The pulley (710) is rotatably arranged at the left side of the telescopic frame (79), and the pull rope (77) is lapped on the outer wall of the pulley (710); The third spring (711) is sleeved on the left side of the outer wall of the telescopic frame (79), one end of the third spring (711) is clamped on the outer wall of the telescopic frame (79), and the other end of the third spring (711) is clamped on the inner wall of the protective box (4); The push switch (712), push switch (712) set up in the right side top of protective housing (4), push switch (712) position and expansion bracket (79) position are corresponding.
  6. 6. The wire harness connection assembly for a new energy automobile as claimed in claim 5, wherein the push-away assembly further comprises: The number of the electric telescopic rods (719) is two, the two electric telescopic rods (719) are respectively arranged at the top parts of the front side and the rear side of the connector (1), and the electric telescopic rods (719) are electrically connected with the pressing switch (712); A connecting piece (720), wherein the connecting piece (720) is arranged on the right side of the electric telescopic rod (719); The number of the push rods (721) is two, the two push rods (721) are respectively and slidably arranged at the top parts of the front side and the rear side of the connector (1), and the right side of the push rods (721) is arranged on the outer wall of the connecting sheet (720).
  7. 7. The wire harness connection assembly for a new energy automobile as claimed in claim 6, wherein the temperature monitoring assembly comprises: The bracket (713) is arranged at the top end of the left side of the inner cavity of the protective box (4); The heat conduction piston cylinder (714), the heat conduction piston cylinder (714) is arranged in the inner cavity of the bracket (713), the heat conduction piston cylinder (714) is slidably and adaptively sleeved on the top of the outer wall of the cable (3), and the inner cavity of the heat conduction piston cylinder (714) is filled with silicone oil; the piston (715) is slidably and adaptively inserted into the inner cavity of the heat-conducting piston cylinder (714); The piston rod (716), the piston rod (716) is arranged on the right side of the piston (715), and the right end of the piston rod (716) slidably extends out of the inner cavity of the heat-conducting piston cylinder (714); the number of the guide rods (717) is two, and the two guide rods (717) are arranged at the top of the right side of the inner cavity of the protective box (4) along the up-down direction; The push plate (718), the slidable looks adaptation of push plate (718) cup joints in the outer wall left side of guide arm (717), the right-hand member of piston rod (716) sets up in the left side top of push plate (718), the slidable looks adaptation in the outer wall right side of pull rod (71) is cup jointed to the bottom of push plate (718), the right side of push plate (718) contacts with the left side of separation blade (75).
  8. 8. The wire harness connection assembly for the new energy automobile according to claim 7, wherein the temperature monitoring assembly takes a connection root of the connector (1) and the electric connection cable (3) as a temperature monitoring point, the heat conduction piston cylinder (714) is attached to the cable to collect temperature, the thrust generated by thermal expansion of silicone oil in the heat conduction piston cylinder (714) is used for driving the piston (715) and the piston rod (716) to axially move, the baffle (75) is pushed by the push plate (718) to drive the pull rod (71) to act, and automatic separation protection of the connector (1) and the automobile is realized when the electric connection cable (3) is abnormally overheated through linkage of the separation assembly.
  9. 9. The wire harness connection assembly for a new energy automobile according to claim 8, wherein the inner cavity of the protective box (4) is further provided with: the number of the rotating rods (5) is two, the front ends and the rear ends of the two rotating rods (5) are respectively rotatably arranged at the left side and the right side of the bottom ends of the front side and the rear side of the inner cavity of the protective box (4) through bearings, and the two rotating rods (5) are respectively positioned at the left side and the right side of the cable (3); The positioning wheels (6), the positioning wheels (6) are sleeved at the middle parts of the outer walls of the rotating rods (5), and the outer walls of the two positioning wheels (6) are contacted with the outer wall of the cable (3).
  10. 10. The wire harness connection assembly for a new energy automobile according to claim 9, wherein the right side of the outer wall of the tie rod (71) is diamond-shaped.

Description

Wire harness connecting assembly for new energy automobile Technical Field The invention relates to the technical field of new energy automobile cables, in particular to a wire harness connecting assembly for a new energy automobile. Background With the high-speed development of the new energy automobile industry, the high-voltage electric system is used as a core component of the new energy automobile, and the operation safety and reliability of the high-voltage electric system directly determine the use safety of the whole automobile. The wire harness connecting assembly is a key pivot for high-voltage electric energy transmission of the new energy automobile, particularly the electric connection wire harness connector and the in-automobile high-voltage wire harness butting assembly bear the core function of stable electric energy transmission, the protection performance of the wire harness connecting assembly directly relates to the safety of electric connection of the automobile and the safety of operation of an electric system of the whole automobile, and the wire harness connecting assembly is one of the core links of safety design of the new energy automobile. At present, the wire harness connecting assembly for the existing new energy automobile is generally provided with a basic insulation protection and mechanical locking structure, and can meet the electric connection requirement under the conventional static working condition. However, in a practical and complex use scenario, the existing harness connection assembly still has significant protection short plates and technical defects, which are specifically embodied in the following aspects: Firstly, the wire harness is insufficient in dragging protection capability, and equipment damage and safety accidents are easy to cause. In the electric connection scene, the situation that the wire harness is pulled strongly or pulled by an improper manual operation or an external unexpected factor due to the fact that a connector is not pulled after electric connection is finished and the vehicle is started by mistake often occurs, and the high-voltage wire harness in the vehicle can be subjected to continuous axial pulling force due to long-term running vibration, assembly deviation and the like of the vehicle. In the prior art, the dragging influence is mostly relieved only by thickening the wire harness outer skin and adding a fixing buckle, the rigid damage of the tension to the connector terminal, the vehicle electric connection interface and the electric connection equipment cannot be fundamentally counteracted, a few schemes with the tension early warning function can only realize acousto-optic reminding, the automatic separation of the connector and the vehicle cannot be driven, when the dragging tension exceeds the rated bearing threshold value of the wire harness, the wire harness wire core is extremely easy to break, the connector terminal deforms and falls off, the vehicle electric interface is permanently damaged, even the electric leakage and the ignition accident after the wire harness is pulled off are caused, and serious personal and equipment safety hazards exist. Secondly, the reliability of abnormal overheat protection is insufficient, and the risk of thermal runaway cannot be blocked from the root. The connection root of the wire harness and the connector is a weak link of an electric connection system, abnormal overheating is easy to occur due to factors such as terminal crimping loosening, poor contact, long-time overload operation, large-current temperature rise and the like, and the wire harness is a core cause for causing the melting, short circuit and fire accident of the whole vehicle of the wire harness insulating layer. In the prior art, overheat protection is realized by matching a temperature sensor with an electric control system, on one hand, signal drift, false triggering and even failure are easy to occur to electronic sensing components under the complex working conditions of vehicle-mounted high-low temperature alternation, strong vibration and wet greasy dirt, and on the other hand, the existing overheat protection scheme is mainly only capable of realizing fault outage and early warning, and cannot drive the physical separation of a connector and a vehicle interface, so that the risk of electrified contact and continuous heating still exists under the fault state, and the thermal runaway can not be thoroughly blocked. Simultaneously, tension protection and overheat protection are mostly two independent control systems among the prior art, and the structure is complicated, the integrated level is low, and occupation installation space is big, is difficult to adapt to compact wire harness connection assembly's overall arrangement demand. Thirdly, the additional design of wire harness protection has a short plate, and the service life and the reusability are insufficient. In the existing wire harness connecting assembly