CN114158185A

CN114158185A - Vehicle machine

Info

Publication number: CN114158185A
Application number: CN202210123303.7A
Authority: CN
Inventors: 仇轶佼
Original assignee: Ningbo Joynext Technology Corp
Current assignee: Ningbo Joynext Technology Corp
Priority date: 2022-02-10
Filing date: 2022-02-10
Publication date: 2022-03-08
Anticipated expiration: 2042-02-10
Also published as: CN114158185B

Abstract

The application discloses car machine includes: the upper cover, the upper circuit board, the radiator, lower floor's circuit board and casing, the upper circuit board, radiator and lower floor's circuit board from last down set gradually between upper cover and casing, be provided with on the radiator and support the locating part, be provided with adjusting nut on supporting the locating part, adjusting nut supports and holds in the inboard that supports the locating part, rotate but can follow and support the locating part and slide from top to bottom in order to restrict the unable horizontal direction of adjusting nut, adjusting nut has the through-hole, install adjusting screw on upper cover and the upper circuit board, above-mentioned adjusting screw passes upper cover and upper circuit board downwards in order to be connected to adjusting nut's through-hole. This application is through setting up the structure that supports locating part and adjusting nut matched with for when adjusting screw fastens downwards, adjusting nut along supporting the locating part and upwards sliding the locking upper circuit board, make the lock pay the reference plane of lid and upper circuit board contact above the plane for accurate, the tolerance chain is accomplished to the minimum, reduces the deformation stress of circuit board.

Description

Vehicle machine

Technical Field

This application belongs to car host computer technical field, concretely relates to car machine.

Background

At present, two PCB boards are usually erected on a car machine by a die-cast shell in a staggered mode, or two PCB boards are erected by equal-height studs.

The die-cast housing is adopted to stagger and erect 2 PCB boards, and the following defects are mainly existed: 1. the weight of the whole machine is increased; 2. the cost is increased.

Adopt equal height double-screw bolt to erect 2 PCB boards, pass through the double-screw bolt connection between the board, mainly have following defect: 1. the stud scheme is that the mounting points of a shell are used as a reference, more parts are stacked upwards to generate a longer tolerance chain, and the longer tolerance chain is finally transmitted to an upper cover, so that the tolerance chain is too long, for example, a product is assembled by two components, the tolerance of each part is +/-0.1 mm, the tolerance after the two components are assembled becomes +/-0.2 mm, the more the components are, the larger the upper limit and the lower limit of the generated tolerance are, therefore, the stacking of the middle parts easily causes the overlong tolerance chain, the larger the height difference of the positioning points of different screws is, the larger the stress is, the internal stress is generated by the deformation of a PCB, and the component is subjected to false soldering or solder paste cracking, so that the function is abnormal; 2. the risk of vibration fracture is easily caused between the plates.

In the design of two PCB boards of a vehicle machine, light weight, stable connection between boards, realization of board-to-board connection with the shortest tolerance chain and reduction of stress generated by PCB board deformation are mainly pursued.

Therefore, how to design a car machine with a short tolerance chain, a stable mounting structure and a lighter weight, which is used for two plates of the car machine and can reduce the tolerance chain, is a technical problem to be solved at present.

Disclosure of Invention

The utility model provides a purpose provides a car machine of reducible tolerance chain to solve the unstable problem of structure that two blocks of PCB board tolerance chains overlength of original car machine lead to.

The technical scheme adopted by the application is as follows:

a car machine, includes: upper cover, upper circuit board, radiator, lower floor's circuit board and casing, the upper circuit board the radiator with lower floor's circuit board is from last down setting gradually the upper cover with between the casing, wherein, the radiator is provided with supports the locating part, be provided with adjusting nut on the support locating part, adjusting nut support hold in the inboard of supporting the locating part is in order to restrict adjusting nut can't the horizontal direction rotate but can follow support the locating part and slide from top to bottom, adjusting nut has the through-hole, the upper cover with install adjusting screw on the upper circuit board, adjusting screw passes downwards the upper cover with the upper circuit board is in order to be connected to adjusting nut in the through-hole.

Furthermore, the upper cover forms a concave part at the position where the adjusting screw is installed, the concave part is abutted against the upper surface of the upper-layer circuit board, and the adjusting screw is fastened with the upper-layer circuit board from the concave part downwards.

Further, the adjusting nut comprises a horizontal nut plate, at least one side end of the first pair of side ends of the horizontal nut plate extends downwards to form a vertical nut plate, and the vertical nut plate abuts against the inner side of the supporting and limiting part.

As an optional implementation manner, the supporting and limiting member includes two first fixing members installed on the heat sink and arranged in parallel, a concave positioning groove is formed at the top of at least one of the first fixing members to position and support at least one of the second opposite side ends of the horizontal nut plate, and the vertical nut plate abuts between the two first fixing members.

As an optional implementation manner, the supporting and limiting member includes a second fixing member installed on the heat sink, a concave positioning groove is formed in the top of the second fixing member, one of the second opposite ends of the horizontal nut is positioned and supported in the positioning groove, the heat sink includes a heat sink flange on the outer side, the other of the second opposite ends abuts against the inner side of the heat sink flange, and two sides of the vertical nut respectively abut against between the second fixing member and the heat sink flange.

As an optional implementation manner, a vertical flange groove is formed in an inner wall of the heat sink flange, and the other side end of the second opposite side end of the horizontal nut extends into the flange groove.

As an alternative embodiment, the other side end of the second pair of side ends of the horizontal nut is tilted upwards to form a bent part, and the bent part slides along the flange groove.

As an alternative embodiment, the bottom parts of the two first fixing pieces are connected and fixed through a base plate, and the two first fixing pieces are integrally formed with the base plate.

Further, the heat sink is fixedly mounted on the lower circuit board, and the lower circuit board is fixedly mounted in the housing.

Furthermore, the adjusting screw is a countersunk screw or a self-tapping screw, and the adjusting nut is made of metal or plastic.

Further, the material of upper cover and casing is the panel beating.

Compared with the prior art, the vehicle machine that this application provided has following technological effect:

1. this application utilizes current circuit board radiator structure, sets up in the heat dissipation and supports locating part and adjusting nut, when screwing up adjusting screw, adjusting nut can be along supporting the locating part locking of upwards sliding along screwing up of adjusting screw, and like this, the reference plane after adjusting screw screws up can align the screw lock at upper cover place automatically and pay the plane for the tolerance chain is accomplished minimumly, thereby reduces risks such as tin cream fracture that circuit board deformation stress brought.

2. The lower floor circuit board and the upper circuit board of this application fasten respectively on casing and upper cover, have increased structural strength for the product is more firm.

3. The structural design of this application supports sheet metal car machine shell, compares traditional die-casting casing, can make complete machine weight lighter.

4. This application mounting structure is simple, does not need the turn-over in the assembling process, directly according to the position order one deck up the stack assembly of part can, interchangeability is strong, has also reduced manufacturing cost simultaneously.

Drawings

FIG. 1 is a schematic assembly diagram of a vehicle machine according to an embodiment of the present application;

FIG. 2 is a schematic overall structure diagram of a vehicle machine in the embodiment of the present application;

FIG. 3 is a cross-sectional view of the overall structure of the vehicle machine in the embodiment of the present application;

FIG. 4 is a partial cross-sectional view of an adjusting nut in an embodiment of the present application in cooperation with a heat slug;

FIG. 5 (a) is a schematic structural view of an adjusting nut in the embodiment of the present application;

FIG. 5 (b) is another schematic structural view of the adjusting nut in the embodiment of the present application;

FIG. 6 is a first schematic view of the structure of the adjusting screw and the adjusting nut in the embodiment of the present application;

fig. 7 is a second schematic structural diagram of the adjustment screw and the adjustment nut in the embodiment of the present application.

Detailed Description

The following examples are only for illustrating the technical solutions of the present application more clearly, and the protection scope of the present application is not limited thereby. As certain terms are used throughout the description and claims to refer to particular components. As one skilled in the art will appreciate, manufacturers may refer to a component by different names. The present specification and claims do not intend to distinguish between components that differ in name but not function. The description which follows is a preferred embodiment of the present application, but is made for the purpose of illustrating the general principles of the application and not for the purpose of limiting the scope of the application. The protection scope of the present application shall be subject to the definitions of the appended claims.

The present application will now be described in further detail with reference to the accompanying drawings and specific examples.

Referring to fig. 1-4, the embodiment of the application discloses a car machine, mainly used on the car host computer, including upper cover 2, upper circuit board 3, radiator 6, lower floor's circuit board 7 and casing 8, upper circuit board 3, radiator 6 and lower floor's circuit board 7 from last down set gradually at upper cover 2 with between the casing 8, one of them side of casing 8 is provided with back lid 9 and covers casing 8 with following the side, and casing 8 and back lid 9 are through ordinary screw 1 fastening, and upper circuit board 3 and lower floor's circuit board 7 all can be the PCB circuit board of epoxy type, and upper cover 2, casing 8 and back lid 9 are the sheet metal component of metal material, light in weight. The upper cover 2 forms a concave part 21 at the position where the adjusting screw 4 is arranged, the horizontal height of the concave part 21 is lower than the horizontal height of other flat parts of the upper cover 2, the bottom end of the concave part 21 just supports against the upper surface of the upper layer circuit board 3, and the corresponding part of the upper layer circuit board 3 is provided with an opening which is communicated with the concave part 21 and is used for the long adjusting screw 4 to pass through. The upper circuit board 3 is arranged below the upper cover 2, the radiator 6 can be fastened with the lower circuit board and the shell 8 through the common screws 1, the lower circuit board 7 is arranged in the shell 8, the lower circuit board 7 and the shell 8 can be fastened through the common screws 1, and a containing space for partial components on the lower circuit board 7 is reserved in the shell 8. The design makes the overall structure layout more compact, saves space and can also reduce product quality and cost. In addition, the lower layer circuit board 7 and the upper layer circuit board 3 are respectively fastened on the shell body 8 and the upper cover 2, so that the structural strength of the circuit boards is increased, and the product performance is more stable.

Because components and parts on the PCB circuit board can generate heat when working for a long time, the heat generated by the components and parts on the circuit board can be quickly dissipated by designing the radiator 6, and therefore the components and parts can not fail due to overheating. The heat sink 6 is located between the upper and lower PCB circuit boards, the heat sink 6 is fixedly supported on the lower circuit board 7 and can be further fastened with the housing 8 through the common screws 1, and the heat sink 6 is preferably made of metal and easily heat-conductive material, such as aluminum or aluminum alloy. In the embodiment of the present application, an outer ring of the heat sink 6 is a flange with a certain height, a supporting limiting part 18 is fixed on the upper surface of the heat sink 6, an adjusting nut 5 is assembled on the supporting limiting part 18, the two are movably connected, and a through hole 51 adapted to the adjusting screw 4 is formed in the adjusting nut 5, wherein the adjusting nut 5 is supported on the inner side of the supporting limiting part 18, and the supporting limiting part 18 enables the adjusting nut 5 to be prevented from rotating in the horizontal direction but can slide in a certain range up and down along the supporting limiting part 18 when being fastened by the adjusting screw 4. The number of the adjusting screws 4 and the matching adjusting nuts 5 can be one, two or even more, in combination with the size of the circuit board and other objective design factors. For example, the number of positioning holes on the existing circuit board can be used to design the corresponding number of adjusting screws 4.

During assembly, the lower circuit board 7 is installed in the housing 8 and fastened by the common screws 1, then the heat sink 6 is installed on the lower circuit board 7, the adjusting nut 5 is placed on the supporting and limiting member 18 of the heat sink 6, the upper circuit board 3 is screwed on the heat sink 6 in alignment with the upper cover 2, and finally the rear cover 9 seals the rear end face of the housing 8 to form a closed cuboid shape as shown in fig. 2. The adjusting screw 4 is screwed down from the concave part 21 of the upper cover 2, passes through the upper circuit board 3, enters the heat sink 6, is finally connected to the through hole 51 of the adjusting nut 5, and can pass through the through hole 51 without contacting with the upper surface of the bottom of the heat sink 6, wherein the adjusting screw 4 can be a countersunk screw or a self-tapping screw, and the adjusting nut 5 can be made of metal or plastic. Along with adjusting screw 4 screws up downwards, adjusting nut 5 slides upwards along supporting locating part 18 and locks, and like this, upper strata circuit board 3 directly is above lid 2 as the benchmark, and the benchmark plane after adjusting screw 4 screws up can align all upper lids 2 and the screw locking plane 19 of upper strata circuit board 3 contact automatically, and then has eliminated the problem that the tolerance chain overlength that the intermediate component piles up and arouses, makes the tolerance chain accomplish minimum to risk such as tin cream fracture that reduction circuit board deformation stress brought.

In order to facilitate installation of the adjusting nut 5 and locking positioning of the adjusting screw 4 and the adjusting nut 5 during fastening, a supporting limiting part 18 and the adjusting nut 5 with special structures are designed in the embodiment of the application, and the two parts are matched to realize locking positioning.

Referring to fig. 5 (a), fig. 5 (a) is a schematic structural diagram of the adjusting nut 5 in the embodiment of the present application, the adjusting nut 5 includes a horizontal nut plate 52 and a vertical nut plate 53 which are integrally formed, the horizontal nut plate 52 is rectangular and has a first pair of side ends in a front-back direction and a second pair of side ends in a left-right direction, both side ends of the first pair of side ends of the horizontal nut plate 52 extend downward to form two vertical nut plates 53, a horizontal width of the vertical nut plate 53 is smaller than a width of the horizontal nut plate 52, and the vertical nut plate 53 abuts against an inner side of the supporting and limiting member 18 to limit the adjusting nut 5 from rotating in the horizontal direction but sliding up and down along the supporting and limiting member 18. When the screw and the nut are locked, the screw thread is inclined, a vertical force and a horizontal force are generated at the same time, and the supporting and limiting part 18 equivalently limits a horizontal rotating force, so that the adjusting nut 5 can only move in the vertical direction, and the adjusting nut 5 is locked with the upper circuit board 3.

The adjusting nut structure shown in fig. 5 (a) is mainly used for the supporting and limiting member structure shown in fig. 6, the supporting and limiting member 18 includes two first fixing members 12 installed on the heat sink 6, the tops of the two first fixing members 12 are provided with concave positioning grooves 121 to position and support two horizontal side ends of the second pair of side ends of the horizontal nut plate 52, and the vertical nut plate 52 abuts between the two first fixing members 12. In this embodiment, the top ends of the two first fixing members 12 are both provided with concave positioning grooves 121, and there are two vertical nut plates 53 of the adjusting nut 5, the two positioning grooves 121 are provided to make the supporting force of the horizontal nut plate 52 better, the two vertical nut plates 53 are provided to make the vertical nut plates 53 contact with four side surfaces of the first fixing members 12 simultaneously when there is a horizontal rotating direction force, so as to improve the rigidity of the vertical nut plates 53, the second opposite side ends of the horizontal nut plates 52 are respectively clamped downwards into the two positioning grooves 121, the width of the positioning grooves 121 is just equal to the width of the second opposite side ends of the horizontal nut plates 52, meanwhile, the width of the vertical nut plates 53 is just equal to or slightly less than the distance between the two first fixing members 12, so that when the adjusting screw 4 is screwed or unscrewed, the two vertical nut plates 53 of the adjusting nut 5 are both blocked by the first fixing members 12 on both sides in the horizontal direction and cannot be displaced in the horizontal direction, can only slide in the vertical direction of the two first fixing pieces 12.

In order to facilitate the fastening of the two first fixing members 12 to the heat sink 6 and improve the overall strength of the first fixing members 12, the bottoms of the two first fixing members 12 are connected and fixed by a base 15, preferably, the two first fixing members 12 and the base 15 are integrally formed to form an independent base, the base 15 is in contact with the heat sink 6 and fastened by screws, and the fastening force of the supporting and limiting member 18 is also improved because the contact surface of the base 15 is wider.

Fig. 5 (b) is another structural schematic diagram of the adjusting nut 5 in the embodiment of the present application, and compared with fig. 5 (a), the main difference is that a bent portion 54 is formed on one side of the horizontal nut plate 52 of the adjusting nut 5, and both sides of the horizontal nut plate 52 of the adjusting nut 5 in fig. 5 (a) are in a horizontal straight plate shape, and the bent portion 54 is formed to facilitate sliding when the side has a groove structure. The adjusting nut structure shown in fig. 5 (b) is mainly used for the supporting and limiting member structure shown in fig. 7.

Referring to fig. 7, the supporting and limiting member 18 includes a second fixing member 13 mounted on the heat sink 6, the heat sink 6 includes a heat sink flange 61 on the outer side, the second fixing member 13 is disposed in parallel with the heat sink flange 61 on the outer side of the heat sink, a concave positioning groove is formed at the top of the second fixing member 13, one of the second opposite side ends of the horizontal nut plate 52 is positioned and supported in the positioning groove, the other of the second opposite side ends abuts against the inner side of the heat sink flange 61, two sides of the vertical nut plate 53 respectively abut between the second fixing member 13 and the heat sink flange 61, when the adjusting screw 4 rotates, two sides of the vertical nut plate 53 are respectively blocked by the second fixing member 13 and the heat sink flange 61, cannot move in the horizontal direction, and can only slide up and down along the inner side of the second fixing member 13 and the inner side of the heat sink flange 61. Unlike the supporting and limiting member structure shown in fig. 6, the other fixing member of the supporting and limiting member structure in the present embodiment is substantially replaced by the outer flange of the heat sink itself, and the corresponding fixing member is not separately provided.

In a more preferable embodiment, a vertical flange groove 611 is formed on the inner wall of the heat sink flange 61, as shown in fig. 6, the bent portion 54 at the other end of the horizontal nut plate 52 just extends into the flange groove 611 completely, so that the two ends of the horizontal nut plate 52 can be positioned in the positioning groove and the flange groove 611 respectively, and the flange groove 611 and the second fixing member 13 can jointly form a supporting and limiting structure. The flange groove 611 can play a role in pre-positioning and auxiliary guiding of the adjusting nut 5, and the provision of the bent portion 54 also facilitates smooth sliding in the flange groove 611, reducing friction.

This application cooperatees through setting up special spacing bearing structure and adjusting nut 5 for when adjusting screw fastens downwards, adjusting nut along supporting locating part 18 upwards slip locking circuit board, make the lock pay plane 19 above the datum plane of lid 2 with the contact of upper circuit board 3 as the standard, make the tolerance chain accomplish minimum, and then reduce the deformation stress of circuit board.

It should be noted that the above-mentioned embodiments are only preferred embodiments of the present application, and do not limit the scope of the claims of the present application, and the present application may also be modified in materials and structures, or replaced with technical equivalents. Therefore, structural equivalents made by using the specification and drawings of the present application, or used directly or indirectly in other related arts, are all within the scope of the present application.

Claims

1. The utility model provides a car machine, its characterized in that includes: an upper cover, an upper circuit board, a radiator, a lower circuit board and a shell, wherein the upper circuit board, the radiator and the lower circuit board are sequentially arranged between the upper cover and the shell from top to bottom,

the radiator is provided with a supporting limiting part, the supporting limiting part is provided with an adjusting nut, the adjusting nut is abutted to the inner side of the supporting limiting part to limit the adjusting nut to rotate in the horizontal direction and can slide up and down along the supporting limiting part, the adjusting nut is provided with a through hole, the upper cover and the upper circuit board are provided with an adjusting screw, and the adjusting screw downwards penetrates through the upper cover and the upper circuit board to be connected to the adjusting nut in the through hole.

2. The machine of claim 1, wherein a concave portion is formed at a position where the adjusting screw is mounted on the upper cover, the concave portion abuts against an upper surface of the upper circuit board, and the adjusting screw is fastened with the upper circuit board from the concave portion downward.

3. The machine of claim 1 or 2, wherein the adjustment nut comprises a horizontal nut plate, at least one of the first pair of lateral ends of the horizontal nut plate extending downward to form a vertical nut plate, the vertical nut plate abutting against an inner side of the support stop.

4. The vehicle machine of claim 3, wherein the support limiting member comprises two first fixing members mounted on the heat sink in parallel, at least one of the first fixing members has a concave positioning groove formed at a top thereof for positioning and supporting at least one of the second pair of side ends of the horizontal nut plate, and the vertical nut plate abuts between inner sides of the two first fixing members.

5. The vehicle machine of claim 3, wherein the supporting and limiting member comprises a second fixing member mounted on the heat sink, a concave positioning groove is formed in the top of the second fixing member, one of the second opposite ends of the horizontal nut is positioned and supported in the positioning groove, the heat sink comprises a heat sink flange on the outer side, the other of the second opposite ends abuts against the inner side of the heat sink flange, and two sides of the vertical nut respectively abut against between the second fixing member and the heat sink flange.

6. The vehicle machine of claim 5, wherein a vertical flange groove is formed in an inner wall of the radiator flange, and the other side end of the second pair of side ends of the horizontal nut extends into the flange groove.

7. The vehicle machine of claim 6, wherein the other side end of the second pair of side ends of the horizontal nut is tilted upwards to form a bent portion, and the bent portion slides along the flange groove.

8. The vehicle machine of claim 4, wherein the bottoms of the two first fixing members are connected and fixed through a bottom platform, and the two first fixing members and the bottom platform are integrally formed.

9. The vehicle machine of claim 1, wherein said heat sink is fixedly mounted on said lower circuit board, said lower circuit board being fixedly mounted in said housing.

10. The vehicle machine of claim 1, wherein the adjusting screw is a countersunk screw or a self-tapping screw, and the adjusting nut is made of metal or plastic.