CN217509167U

CN217509167U - LPM fan speed governing module structure based on assembly of crouching of circuit board

Info

Publication number: CN217509167U
Application number: CN202122960712.6U
Authority: CN
Inventors: 花瑞; 王峰; 王善成
Original assignee: Shanghai Krah Seuffer Electronics Co ltd
Current assignee: Shanghai Krah Seuffer Electronics Co ltd
Priority date: 2021-11-30
Filing date: 2021-11-30
Publication date: 2022-09-27
Anticipated expiration: 2031-11-30

Abstract

The utility model relates to a LPM fan speed regulation module structure based on horizontal assembly of a circuit board, which comprises an upper cover, a circuit board, a radiator, a sealing ring, an insert piece bracket group, a screw and an MOS chip; the MOS chip is fixed on the radiator by the screw, the insert sheet support group is arranged on the circuit board and then is placed on the radiator, pins of the MOS chip are welded on the circuit board, one end of the assembly component is sleeved into the sealing ring, and the other end of the assembly component is sleeved into the upper cover. Compared with the prior art, the utility model has the advantages of the assembly is simple and convenient, low cost, protection nature are good.

Description

LPM fan speed governing module structure based on assembly of crouching of circuit board

Technical Field

The utility model relates to a LPM fan speed governing modular structure especially relates to a LPM fan speed governing modular structure based on assembly of crouching flat of circuit board.

Background

As shown in fig. 1, a radiator of a fan speed regulation module of an existing LPM (automotive air conditioning blower) adopts long ribs and 4 open limiting mounting holes of an upper cover, interference fit is realized in the limiting mounting holes by riveting and expanding the long ribs of the radiator through a punch of a press, assembly and fixation of the upper cover are completed, and the process is complex and poor in reliability; meanwhile, the circuit rice is placed and positioned by the four positioning table posts of the inserting sheet support group, the structure of parts is complex, in addition, the MOS chip is installed and positioned by the installation positioning grooves of the inserting sheet support group, and the problems of complex structure of parts, narrow space, difficult assembly, poor reliability and the like exist.

As shown in figure 2, a circuit board of the conventional LPM fan speed regulation module directly penetrates through an insertion sheet and then is welded by an automatic selection welding machine, and a bracket group has the characteristics of circuit board placement and MOS installation positioning grooves, so that the problems of complex structure, high mold cost and the like exist.

As shown in fig. 3, the MOS chip of the conventional LPM fan speed regulation module is relatively high in position with respect to the circuit board, which results in space waste.

As shown in fig. 4, a sealing ring of the conventional LPM fan speed regulation module is of an E-shaped structure, and when the upper cover and the radiator are buckled, deformation directions of three long sealing ribs are inconsistent, so that the protection performance is affected.

Therefore, the assembly that current LPM fan speed governing module exists is loaded down with trivial details difficulty, is equipped with the hindrance, and spare part structure is complicated mould cost too high, and safeguard function is not enough, does not satisfy and produces line manufacturing requirement scheduling problem.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a LPM fan speed governing modular structure based on assembly of crouching of circuit board that the assembly is simple and convenient, low cost, protectiveness are good in order to overcome the defect that above-mentioned prior art exists.

The purpose of the utility model can be realized through the following technical scheme:

according to one aspect of the utility model, an LPM fan speed regulation module structure based on horizontal assembly of a circuit board is provided, which comprises an upper cover, the circuit board, a radiator, a sealing ring, an insert piece bracket group, a screw and an MOS chip;

the screw fixes the MOS chip on the radiator, the inserting sheet support group is arranged on the circuit board and then is placed on the radiator, the pins of the MOS chip are welded on the circuit board, one end of the assembly component is sleeved into the sealing ring, and the other end of the assembly component is sleeved into the upper cover.

As a preferred technical scheme, the heat sink is provided with an MOS chip screw hole for fixing and locking the MOS chip, and the MOS chip screw hole corresponds to the screw.

As the preferred technical scheme, the radiator is provided with a circuit board placing boss for placing a circuit board.

As the preferred technical scheme, the upper cover and the radiator adopt a clamping hook assembly mode.

As a preferred technical scheme, the upper cover is provided with four symmetrical hooks, and the radiator is provided with a strip fixing block corresponding to the hooks.

As the preferred technical scheme, the radiator is provided with a circuit board supporting and placing mechanism and MOS chip limiting ribs.

As the preferred technical scheme, the inserting sheet support group is formed by integrating four inserting sheets into an inserting sheet support component by adopting an integrated injection molding process, an annular sealing V-shaped groove is arranged at the position, corresponding to the mounting surface of the upper cover, of the inserting sheet support group, and the annular sealing V-shaped groove and a V-shaped convex rib of the upper cover are tightly sealed.

As a preferred technical scheme, two sides of the inserting piece are designed with asymmetric positioning columns for positioning and mounting the circuit board; the inserting piece adopts a wide-pin tin-coating structure.

As a preferable technical scheme, the circuit board adopts a perforated structure at the position of the corresponding screw hole of the MOS chip.

As the preferred technical scheme, the sealing ring is made of silicon rubber materials and is provided with an E-shaped inverted V-shaped opening structure, and the E-shaped inverted V-shaped opening structure comprises three inverted V-shaped sealing ribs.

Compared with the prior art, the utility model has the advantages of it is following:

1) the utility model discloses because the design radiator has adopted long bar fixture block structure, and the lid has adopted 4 built-in barb structures, can realize the lock assembly with the radiator to design circuit board places the characteristic on the radiator, and MOS chip limit characteristic has that the structure is retrencied, assembles the efficient characteristics.

2) The utility model discloses an among the design module assembly structure, the inserted sheet adopts the fit one-tenth of integrative injection moulding technology whole to the airtight structure of the ring type recess of mutually supporting and boss has been designed at the installation joint part of support group and upper cover, has strengthened the protection. The asymmetric positioning column design is added at the two ends of the support group, the tail end of the inserting piece adopts the wide piece design easy to tin, the inserting piece is conveniently assembled with the circuit board and welded together through a wave soldering machine, and the support has the characteristics of simple structure, convenience in assembly, reduced weight and saved material cost.

3) The utility model discloses an among the design module assembly structure, adopt the circuit board horizontal to lie and place, its circuit board MOS screw corresponds the position and adopts fenestrate design, and then has optimized the mounting height, has satisfied customer's low plane installation requirement, has further reduced the whole volume of module.

4) The utility model discloses an adopt silicon rubber materials to design solitary E type sealing washer of falling V, compare with simple E type sealing washer before, receive the effect of module pressfitting power behind module upper cover lock radiator, 3 the direction of meeting an emergency of sealing rib is unanimous, and the sealing washer can have better airtight effect with the upper cover cooperation, and whole barrier propterty has very big improvement, and the protecting effect is good.

Drawings

FIG. 1 is a schematic view of an assembly structure of a conventional LPM fan speed regulation module;

FIG. 2 is a schematic structural diagram of a blade support assembly of an LPM fan speed regulation module of the prior art;

FIG. 3 is a schematic diagram of the installation height of a circuit board of a conventional LPM fan speed regulation module;

FIG. 4 is a schematic structural diagram of a sealing ring of a conventional LPM fan speed regulation module;

fig. 5 is an exploded schematic view of the LPM fan speed regulation module of the present invention;

fig. 6 is an overall structural schematic diagram of the LPM fan speed regulation module of the present invention;

fig. 7 is a schematic diagram of a partial sectional structure of the LPM fan speed regulation module of the present invention;

FIG. 8 is a schematic view of the insert holder assembly of the present invention;

FIG. 9 is an enlarged view of a portion of FIG. 8;

fig. 10 is another view-angle structure diagram of the insert sheet bracket set according to the present invention;

fig. 11 is a schematic diagram of the mounting height of the circuit board of the LPM fan speed regulation module of the present invention;

fig. 12 is the sealing ring structure schematic diagram of the LPM fan speed regulation module of the present invention.

The structure comprises an upper cover 1, a circuit board 2, a radiator 3, a sealing ring 4, an insert sheet support group 5, screws 6, an MOS chip 7, a hook 11, a perforated structure 21, a circuit board supporting and placing mechanism 31, an MOS chip limiting rib 32, an E-shaped inverted V-shaped structure 41, an annular sealing V-shaped groove 51, an asymmetric positioning column 52 and a wide-foot tin-coating structure 53.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall fall within the protection scope of the present invention.

As shown in fig. 5-6, an LPM fan speed regulation module structure based on horizontal assembly of a circuit board comprises an upper cover 1, a circuit board 2, a radiator 3, a seal ring 4, an insert bracket set 5, a screw 6 and an MOS chip 7; the MOS chip 7 is fixed on the radiator 3 by the screw 6, the inserting piece support group 5 is arranged on the circuit board 2 and then is placed on the radiator 3, the pins of the MOS chip 7 are welded on the circuit board 2, one end of the assembly component is sleeved into the sealing ring 4, and the other end of the assembly component is sleeved into the upper cover 1. The radiator 3 is provided with an MOS chip screw hole for fixing and locking the MOS chip 7, and the MOS chip screw hole corresponds to the screw 6. The radiator 3 is provided with a circuit board placing boss for placing the circuit board 2.

The utility model discloses an assembly process as follows:

the method comprises the steps of fixing and locking an MOS chip in an MOS chip screw hole of a radiator by using screws, then placing a circuit board assembly provided with a welded inserting piece support group on a circuit board placing boss of the radiator, paying attention to enable MOS chip pin welding holes of the circuit board to penetrate through pins of the MOS chip, and then welding the circuit board and the MOS chip pins by using an automatic selective welding machine. And sleeving the welded assembly into the sealing ring, then sleeving the sealing ring into the cover, and finally pressing the upper cover by using a press to complete assembly.

Compared with the prior art, the utility model has the advantages of simple structure, protection nature are strong, easily assembly, low cost, reliable and stable have simplified fan speed governing module spare part, the effectual convenience that improves the assembly has alleviateed the quality, has saved the cost, has increased the competitiveness of product.

As shown in fig. 7, the upper cover 1 and the heat sink 3 are assembled by a snap. The upper cover 1 is provided with four symmetrical hooks 11, and the radiator 3 is provided with a long-strip fixed block corresponding to the hooks 11; the fixed knot of two rectangular fixed blocks of four symmetry pothook overhead kick radiators constructs, the characteristics of make full use of radiator material plasticity. The radiator 3 is provided with a circuit board supporting and placing mechanism 31 and an MOS chip limiting rib 32. The clamping hook characteristics, the circuit board supporting and placing structure and the MOS chip assembling and limiting structure are directly designed on the radiator, the assembling and positioning problems of assembling of the upper cover and the radiator, placing of the circuit board, limiting of the MOS chip and the like are solved, and the radiator has the advantages of being simple in structure, reducing parts and being efficient in assembling.

As shown in fig. 8-10, the insert sheet bracket set 5 is a set of four insert sheets integrated by an injection molding process to form an insert sheet bracket set, an annular sealing V-shaped groove 51 is formed at a position corresponding to the mounting surface of the upper cover 1 of the insert sheet bracket set 5, the annular sealing V-shaped groove 51 is tightly sealed with the V-shaped convex rib of the upper cover, and the protection performance is improved. Two sides of the insert are designed with asymmetric positioning columns 52 for positioning and mounting the circuit board; the insert sheet adopts a wide-pin tin-coating structure 53. With this tin volume on guaranteeing inserted sheet both sides, increased the stability of product soldering tin point quality, can be with circuit board an organic whole through wave-soldering machine welding, have simple structure, convenient assembly, it is with low costs.

As shown in fig. 11, the circuit board 2 adopts a through hole structure 21 at the corresponding screw hole position of the MOS chip. The relative position of the MOS chip and the circuit board is reduced, the circuit structure and the installation height of the module are optimized, and the overall size of the module is reduced.

As shown in fig. 12, the sealing ring 4 is made of a silicon rubber material, and is provided with an E-shaped inverted V-shaped structure 41, and the E-shaped inverted V-shaped structure 41 includes three inverted V-shaped sealing ribs. After the upper cover and the radiator are assembled and buckled, the three inverted V-shaped sealing ribs can be bent in the same direction to form a closed loop with the inner wall of the shell under the action of the pressing force, the effect of effectively protecting and blocking foreign objects is achieved, the assembling efficiency is high, the cost is low, and the protection effect is good.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of various equivalent modifications or replacements within the technical scope of the present invention, and these modifications or replacements should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. An LPM fan speed regulation module structure based on horizontal assembly of a circuit board is characterized by comprising an upper cover (1), the circuit board (2), a radiator (3), a sealing ring (4), an insert support group (5), a screw (6) and an MOS chip (7);

the MOS chip is fixed on the radiator (3) through the screw (6), the inserting piece support group (5) is arranged on the circuit board (2) and then is placed on the radiator (3), pins of the MOS chip (7) are welded on the circuit board (2), one end of the assembled radiator (3) is sleeved into the sealing ring (4), and the other end of the assembled radiator is sleeved into the upper cover (1).

2. The LPM fan speed regulation module structure based on the horizontal assembly of the circuit board according to claim 1, characterized in that the heat sink (3) is provided with a MOS chip screw hole for fixing and locking the MOS chip (7), and the MOS chip screw hole corresponds to the screw (6).

3. The LPM fan speed regulation module structure based on the horizontal assembly of the circuit board according to claim 1, characterized in that the heat sink (3) is provided with a circuit board placing boss for placing the circuit board (2).

4. The LPM fan speed regulation module structure based on horizontal assembly of circuit board of claim 1, characterized in that, upper cover (1) and radiator (3) adopt the trip assembly mode.

5. The LPM fan speed regulation module structure based on circuit board horizontal assembly of claim 4, characterized in that, upper cover (1) on be equipped with four symmetrical pothooks (11), radiator (3) be equipped with the rectangular fixed block that corresponds with pothook (11).

6. The LPM fan speed regulation module structure based on the horizontal assembly of the circuit board according to claim 4, characterized in that the radiator (3) is provided with a circuit board support placement mechanism (31) and a MOS chip limit rib (32).

7. The LPM fan speed regulation modular structure based on horizontal assembly of circuit board of claim 1, characterized in that, inserted sheet support group (5) for four inserted sheets adopt integrative injection moulding technology fit to become an inserted sheet support subassembly, this inserted sheet support group (5) and upper cover (1) installation face corresponding position is equipped with annular seal V type recess (51), this annular seal V type recess (51) is closely knit to be sealed with the V type protruding muscle of upper cover.

8. The LPM fan speed regulation module structure based on horizontal assembly of circuit board of claim 7, characterized in that, the both sides of said male tab design the asymmetric locating column (52) used for circuit board location installation; the inserting sheet adopts a wide-pin tin-coating structure (53).

9. The LPM fan speed regulation module structure based on horizontal assembly of circuit board according to claim 2, characterized in that, the circuit board (2) adopts perforation structure (21) in the corresponding MOS chip screw hole position.

10. The LPM fan speed regulation module structure based on horizontal assembly of circuit board according to claim 2, characterized in that, the sealing ring (4) is made of silicon rubber material and is provided with an E-shaped inverted V-shaped structure (41), and the E-shaped inverted V-shaped structure (41) comprises three inverted V-shaped sealing ribs.