CN210075838U

CN210075838U - Electronic control unit

Info

Publication number: CN210075838U
Application number: CN201920213390.9U
Authority: CN
Inventors: 李洪祥
Original assignee: Synerject Automobile Electronic Changchun Co Ltd
Current assignee: Vitesco Automotive Changchun Co Ltd
Priority date: 2019-02-19
Filing date: 2019-02-19
Publication date: 2020-02-14
Anticipated expiration: 2029-02-19

Abstract

The utility model provides an electronic control unit, it includes casing, circuit board, arranges the heat dissipation between circuit board and the casing in and glues and fix the fixing device subassembly on the casing with the circuit board. The electronic control unit further comprises a through hole formed in the circuit board and an extension column fixed to the shell, and the extension column penetrates through the through hole and can move along the axial direction of the through hole. The utility model provides an electronic control unit locates the through-hole on the circuit board and fixes the extension post to on the casing through the setting, and the extension post passes from the through-hole. The circuit board can be pre-positioned by the aid of the arrangement, and the circuit board can be arranged flatly by pressing the through hole.

Description

Electronic control unit

Technical Field

The utility model relates to an electronic control unit, especially a need radiating electronic control unit.

Background

Electronic control units are increasingly used in the prior art. The electronic control unit generally includes a housing, a circuit board, a heat-dissipating adhesive interposed between the circuit board and the housing, and a fixing device assembly for fixing the circuit board to the housing. After the heat dissipation glue is coated on the shell, the circuit board is placed on the heat dissipation glue, and then the circuit board is fixed on the shell through the fixing device assembly. Because the heat dissipation glue is sticky and has poor fluidity, some places of the assembled circuit board can be warped because the heat dissipation glue is far away from the fixing device and has small stress, and the whole heat dissipation performance of the electronic control unit is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a can fix a position and can make the more level and smooth electronic control unit who sets up of circuit board.

According to an aspect of the present invention, there is provided an electronic control unit, which includes a housing, a circuit board, a heat dissipation adhesive disposed between the circuit board and the housing, and a fixing device assembly for fixing the circuit board to the housing. The electronic control unit further comprises a through hole formed in the circuit board and an extension column fixed to the shell, and the extension column penetrates through the through hole and can move along the axial direction of the through hole.

Preferably, the housing is provided with a threaded hole, and the fixing device assembly includes a bolt engaged with the threaded hole to fix the circuit board to the housing.

Preferably, the periphery of screw hole is equipped with first step face, the periphery of extension post is equipped with the boss, the height of first step face equals the height of boss.

Preferably, the boss is at least two protrusions which are arranged at intervals and located on the periphery of the extension column.

Preferably, the first step surface is disposed around the threaded hole.

Preferably, the through hole is cylindrical, and the extension column is in a truncated cone shape, but is not limited thereto.

Preferably, the casing includes first casing, second casing and locates the recess between first casing and the second casing, the heat dissipation is glued including locating the first heat dissipation between first casing and the circuit board and locating the second heat dissipation between second casing and the circuit board and glue, the circuit board is equipped with the first through-hole that is located first casing top and is located the second through-hole of second casing top.

Preferably, the housing is provided with a first threaded hole located on the first housing, a fourth threaded hole located on the second housing, a first through hole located on the first housing, and a second through hole located on the second housing, and the first through hole and the second through hole are located between the first threaded hole and the fourth threaded hole.

Preferably, the circuit board is the rectangle, the fixing device subassembly including locate four screw holes on the casing and with four bolts of screw hole complex, four bolts locate on four angles of circuit board and evenly distributed.

Preferably, the first through hole and the second through hole are located on a transverse central axis of the circuit board and are symmetrically arranged relative to a longitudinal central axis of the circuit board.

The utility model provides an electronic control unit locates the through-hole on the circuit board and fixes the extension post to on the casing through the setting, and the extension post passes from the through-hole. The circuit board can be positioned by the aid of the positioning device, and the circuit board can be arranged flatly by pressing the through holes.

Drawings

Fig. 1 is an exploded perspective view of an electronic control unit according to the present invention.

Fig. 2 is an enlarged view at "a" in fig. 1.

Fig. 3 is a front view of the housing.

Fig. 4 is a cross-sectional view of the electronic control unit of the present invention.

Fig. 5a is an enlarged view at "B" in fig. 4.

Fig. 5b is an enlarged view at "C" in fig. 4.

Detailed Description

Referring to fig. 1 to 5b, the present invention provides an electronic control unit 100, which includes a housing 1, a circuit board 3, a heat dissipation glue 2 disposed between the circuit board 3 and the housing 1, and a fixing device assembly for fixing the circuit board 3 to the housing 1. The electronic control unit 100 further includes through holes (33, 34) provided on the circuit board 3, and extension columns (15, 16) fixed to the housing 1, the extension columns (15, 16) passing through the through holes (33, 34) and being movable in the axial direction of the through holes (33, 34). In the present embodiment, there are two through holes, which are provided with the first through hole 33 and the second through hole 34. The extending columns are two, and a first extending column 15 and a second extending column 16 are arranged. The first extending column 15 passes through the first through hole 33, and the second extending column 16 passes through the second through hole 34. When the electronic control unit 100 is manufactured, the heat dissipation glue 2 is firstly coated on the housing 1, and then the circuit board 3 is placed on the heat dissipation glue 2. The circuit board 3 is fixed to the housing 1 by the fixing device assembly. Because when scribbling heat dissipation and gluing 2, heat dissipation is glued 2 and is cylindrical orbit, and heat dissipation glues 2 and glues more ropy, and the mobility is relatively poor, so fix circuit board 3 back to casing 1 through the fixing device subassembly on, heat dissipation glues 2 and glues the more distant department because the less thickness of gluing of atress can be bigger apart from the fixing device subassembly, and then leads to circuit board 3 to take place the warpage, influences the radiating problem of whole. Through setting up first extension post 15, second extension post 16, first through-hole 33 and second through-hole 34, use pressure device 5 to press the through-hole department of circuit board 3 to make heat dissipation glue 2 remove, and then make circuit board 3 more level and smooth.

The housing 1 includes a first housing 11, a second housing 12, and a groove 13 provided between the first housing 11 and the second housing 12. A first screw hole 141, a second screw hole 142, a third screw hole (not shown) and a fourth screw hole 144 are provided above the first housing 11. The first extending column 15 is disposed on the first housing 11, and the second extending column 16 is disposed on the second housing 12. Preferably, the first housing 11 and the first extension post 15 are integral, and the second housing 12 and the second extension post 16 are integral. An annular first step surface 1411 is arranged on the periphery of the first threaded hole 141, an annular second step surface 1421 is arranged on the periphery of the second threaded hole 142, an annular third step surface is arranged on the periphery of the third threaded hole, and an annular fourth step surface 1441 is arranged on the periphery of the fourth threaded hole 144. The first extension column 15 is provided with a plurality of spaced bosses 151 at the periphery thereof, and a space 152 is provided between any two bosses 151. The first step surface 1411, the second step surface 1421, the third step surface, the fourth step surface 1441, and the boss 151 are the same in height. The heights of the first step surface 1411, the second step surface 1421, the third step surface and the fourth step surface 1441 are d1, the height of the boss 151 is d2, and d1 and d2 are the same. With this arrangement, when the circuit board 3 is pressed, the circuit board 3 will finally abut against the upper surface of the boss 151, so that the height of the circuit board 3 is relatively flat. The excess heat dissipation paste 2 may flow into the first through-hole 33 and the second through-hole 34. The through holes (33, 34) are cylindrical, and the extending columns (15, 16) are truncated cone-shaped. In order to facilitate the placing of the extension posts (15, 16) in the through holes (33, 34), the upper surfaces of the extension posts (15, 16) may be chamfered.

In the present embodiment, since the first extension column 15 and the second extension column 16 have the same structure, the second extension column 16 is also provided with bosses at intervals on the periphery thereof. And therefore, for the sake of brevity, will not be described in detail.

The fixture assembly includes a first bolt 41, a second bolt 42, a third bolt 43, and a fourth bolt 44. The first, second, third and

fourth bolts

41, 42, 43 and 44 are respectively engaged with the first, second, third and

fourth screw holes

141, 142, 144 to fix the circuit board 3 to the housing 1. Although in the present embodiment, four bolts and four threaded holes are provided, it is within the scope of the present patent to provide other numbers of threads and threaded holes.

The heat dissipation paste 2 includes a first heat dissipation paste 21 disposed between the first housing 11 and the circuit board 3 and a second heat dissipation paste 22 disposed between the second housing 12 and the circuit board 3. At the time of assembly, electronic components requiring heat dissipation are placed at the circuit board 3 at the first case 11 and the second case 12. Electronic components which do not need heat dissipation are placed on the circuit board 3 and located in the groove 13, so that the electronic components can be placed on the front side and the back side of the circuit board 3 located in the groove 13, and the using efficiency of the circuit board 3 is improved.

Preferably, the circuit board 3 is rectangular, and four bolts are arranged at four corners of the circuit board 3 and are uniformly distributed.

The first through hole 33 and the second through hole 34 are located on the transverse central axis L1 of the circuit board 3 and are symmetrically arranged with respect to the longitudinal central axis L2 of the circuit board 3.

The pressing device 5 includes a first pressing device 51 and a second pressing device 52. Since the first and second

pressing devices

51 and 52 have the same structure, only the first pressing device 51 will be described herein for the sake of simplicity.

The first pressure applying means 51 includes a rubber member 511 and a rigid member 512 provided above the rubber member 511. The rubber member 511 is provided with a housing hole 5111 opened downward. When the pressure is applied, the rubber piece 511 is pressed against the circuit board 3, and the first extending column 15 extends into the receiving hole 5111. Since the rubber member 511 is used to directly contact the circuit board 3, damage to the circuit board 3 can be avoided. As can be seen from fig. 5b, a gap is provided between the first extending column 15 and the first through hole 33, so that the excess heat dissipation glue 2 can flow into the gap between the first through hole 33 and the first extending column 15.

It will be apparent to those skilled in the art that various modifications and variations can be made to the above-described exemplary embodiments of the present invention without departing from the spirit and scope of the invention. Thus, it is intended that the present invention cover the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.

Claims

1. The utility model provides an electronic control unit, its includes casing (1), circuit board (3), places heat dissipation glue (2) between circuit board (3) and casing (1) and fixes the fixing device subassembly on casing (1) with circuit board (3) in, its characterized in that, electronic control unit is still including locating through-hole (33, 34) on circuit board (3) and fixed extension post (15, 16) to casing (1), extension post (15, 16) pass and can follow the axial displacement of through-hole (33, 34) from through-hole (33, 34).

2. An electronic control unit according to claim 1, characterized in that the housing (1) is provided with threaded holes (141, 142, 144), and the fixing means assembly comprises bolts (41, 42, 43, 44) cooperating with the threaded holes (141, 142, 144), said bolts (41, 42, 43, 44) cooperating with the threaded holes (141, 142, 144) to fix the circuit board (3) to the housing (1).

3. The electronic control unit of claim 2, characterized in that the periphery of the threaded hole (141, 142, 144) is provided with a first step surface (1411, 1421, 1441), the periphery of the extension column (15) is provided with a boss (151), and the height of the first step surface (1411, 1421, 1441) is equal to the height of the boss (151).

4. The electronic control unit of claim 3, characterized in that the boss (151) is at least two projections spaced apart and located at the periphery of the extension column (15).

5. The electronic control unit of claim 3, characterized in that the first step surface (1411, 1421, 1441) is provided around the threaded hole (141, 142, 144).

6. Electronic control unit according to claim 1, characterized in that said through hole (33, 34) is cylindrical and said extended column (15, 16) is frustoconical.

7. The electronic control unit according to claim 1, characterized in that the housing (1) comprises a first housing (11), a second housing (12) and a recess (13) provided between the first housing (11) and the second housing (12), the heat-dissipating glue (2) comprises a first heat-dissipating glue (21) provided between the first housing (11) and the circuit board (3) and a second heat-dissipating glue (22) provided between the second housing (12) and the circuit board (3), and the circuit board (3) is provided with a first through-hole (33) above the first housing (11) and a second through-hole (34) above the second housing (12).

8. The electronic control unit according to claim 7, characterized in that the housing (1) is provided with a first threaded hole (141) on the first housing (11), a fourth threaded hole (144) on the second housing (12), a first through hole (33) on the first housing (11) and a second through hole (34) on the second housing (12), the first through hole (33) and the second through hole (34) being located between the first threaded hole (141) and the fourth threaded hole (14).

9. The electronic control unit according to claim 7, characterized in that the circuit board (3) is rectangular, and the fixing device assembly comprises four threaded holes provided on the housing (1) and four bolts engaged with the threaded holes, the four bolts being provided at four corners of the circuit board (3) and evenly distributed.

10. The electronic control unit of claim 9, characterized in that the first through hole (33) and the second through hole (34) are located on a transverse center axis (L1) of the circuit board (3) and are symmetrically arranged with respect to a longitudinal center axis (L2) of the circuit board (3).