Integrated tool for screwing rectifier bridge

Abstract

The utility model discloses an integrated tool for screwing a screw on a rectifier bridge, and belongs to the technical field of assembly tools. An integrated tool for screwing a rectifier bridge comprises a base used for limiting a cooling fin, a patch used for shaping a silicone grease layer shape on the top of the cooling fin and a cover plate used for positioning a rectifier bridge chip on the top of the silicone grease layer, and the patch and the cover plate are sequentially and detachably arranged on the top of the base. The utility model has the advantages that the waste of heat-conducting silicone grease is reduced, and the assembly efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of assembly tools, in particular to an integrated tool for screwing rectifier bridges. Background Art

[0002] A rectifier bridge is a type of chip. As a power component, it generates heat during operation. When operating at full load, it generates a large amount of heat. Therefore, a heat sink (sheet heat sink) needs to be equipped. The existing rectifier bridge mainly consists of three parts, namely a chip body, a heat sink, and bolts for fixing the above two. Among them, thermal grease needs to be applied at the contact position between the chip body and the heat sink to ensure the heat dissipation effect.

[0003] The traditional rectifier bridge assembly combination is all carried out manually. First, thermal grease is applied to the chip, then the chip is fixed on the heat sink, and finally, screws are used to tighten and fix. Since the amount and area of the thermal grease cannot be effectively controlled, and in order to prevent the appearance of voids (voids refer to the space between the chip body and the heat sink that is not filled with grease), workers tend to apply a relatively large amount of grease. At the same time, during the operation process, due to frequent manual contact with the grease, there is residue in other places, resulting in serious waste of grease. Moreover, the obvious overflow of the excessive grease also affects the appearance neatness of the rectifier bridge. Furthermore, when applying the grease, the control effect of the thickness uniformity is not good. After using screws to fix the chip body and the heat sink, the chip is prone to skew. Summary of the Utility Model

[0004] The purpose of the utility model is to solve the problem that it is not easy to control the amount of thermal grease in the traditional rectifier bridge assembly process, and an integrated tool for screwing rectifier bridges is proposed.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0006] An integrated tool for screwing rectifier bridges includes a base for limiting the heat sink, a patch for shaping the thermal grease layer on the top of the heat sink, and a cover plate for positioning the rectifier bridge chip on the top of the thermal grease layer. The patch and the cover plate are sequentially detachably arranged on the top of the base.

[0007] Further, the base includes a seat body and a heat sink groove. A heat sink groove with an inner wall size corresponding to the outer wall size of the heat sink is opened on the top of the seat body. The heat sink groove is a sunken groove with an open top.

[0008] Further, a nut groove is opened at the center of the bottom of the heat sink groove.

[0009] Further, access grooves are opened on both sides of the heat sink groove.

[0010] Furthermore, the depth of the heat sink groove is not greater than the height of the heat sink.

[0011] Furthermore, the patch includes a thin sheet and a thermal grease groove. A thermal grease groove aligned with the center of the heat sink groove is provided on the thin sheet. The inner wall dimensions of the thermal grease groove correspond to the outer wall dimensions of the rectifier bridge chip, and the thermal grease groove is a through groove.

[0012] Furthermore, the cover plate includes a plate body and a chip groove. A chip groove aligned with the center of the heat sink groove is provided on the plate body. The inner wall dimensions of the chip groove correspond to the outer wall dimensions of the rectifier bridge chip, and the chip groove is a through groove.

[0013] Furthermore, a pin groove is provided at one end of the chip groove.

[0014] Furthermore, an overflow groove is provided at the bottom of the side wall of the chip groove.

[0015] Furthermore, a positioning structure is further included. The positioning structure includes a plurality of positioning pins fixed on the top of the base, a first positioning hole provided on the patch, and a second positioning hole provided on the cover plate. The first positioning hole and the second positioning hole are aligned with the positioning pins.

[0016] Compared with the prior art, the present utility model provides an integrated tool for screwing the rectifier bridge, and has the following beneficial effects:

[0017] When the integrated tool for screwing the rectifier bridge of the present utility model is used, first place the heat sink on the base, then place the patch on the heat sink, and then apply a thermal grease layer with a predetermined shape and thickness on the top of the heat sink through the patch. Remove the patch, place the cover plate on the base, and then place the rectifier bridge chip on the thermal grease layer through the cover plate. Press the rectifier bridge chip tightly, and finally remove the cover plate and then remove the entire rectifier bridge. Compared with the prior art, it can accurately shape the planar dimensions and thickness of the thermal grease layer, thereby precisely controlling the amount of thermal grease used, reducing the situation that the uneven application of thermal grease affects the heat dissipation effect and wastes thermal grease, and at the same time ensuring the concentricity of the heat sink, the thermal grease layer and the rectifier bridge chip, reducing deviation, and improving the assembly effect.

[0018] Other advantages, objectives and features of the present utility model will be described to some extent in the subsequent description; and to some extent, based on the study of the following text, it will be obvious to those skilled in the art; or, it can be taught from the practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic exploded view of the overall structure of the present utility model;

[0020] Figure 2 is a schematic perspective view of the base structure of the present utility model;

[0021] Figure 3 This is a top view schematic diagram of the base structure of the present utility model;

[0022] Figure 4 This is a three-dimensional schematic diagram of the patch structure of the present utility model;

[0023] Figure 5 This is a three-dimensional schematic diagram of the cover plate structure of the present utility model;

[0024] Figure 6 This is the Figure 5 Schematic diagram of the enlarged effect of the structure of part A in the present utility model;

[0025] Figure 7 This is a three-dimensional schematic diagram of a rectifier bridge structure in the prior art;

[0026] Figure 8 This is an exploded effect schematic diagram of a rectifier bridge structure in the prior art.

[0027] In the figure:

[0028] 1. Base; 101. Base body; 102. Heat sink groove; 103. Pick-up and placement groove; 104. Nut groove; 105. Positioning pin; 2. Patch; 201. Thin sheet; 202. Grease groove; 203. First positioning hole; 204. Pinch piece; 3. Cover plate; 301. Plate body; 302. Chip groove; 303. Pin slot; 304. Second positioning hole; 305. Pull ring; 306. Overflow groove; 4. Rectifier bridge; 401. Rectifier bridge chip; 402. Heat sink; 403. Bolt; 404. Nut; 405. Pin. Specific embodiments

[0029] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments.

[0030] Refer to Figures 1-8 , the integrated tool for screwing the rectifier bridge of the present utility model includes a base 1 for limiting the heat sink 402, a patch 2 for shaping the grease layer on the top of the heat sink 402, and a cover plate 3 for positioning the rectifier bridge chip 401 on the top of the grease layer, so that the centers of the heat sink 402, the grease layer, and the rectifier bridge chip 401 are aligned. The patch 2 and the cover plate 3 are sequentially detachably arranged on the top of the base 1.

[0031] The base 1 is made of metal or hard plastic and is used to fix the position of the heat sink 402;

[0032] The patch 2 is made of a thin metal sheet or a plastic sheet, has good toughness, can be slightly pressed to bend, and is used to shape the thermal grease on the top surface of the heat sink 402. The shape includes a planar dimension (here, the planar dimension refers to the length and width dimensions of the orthographic projection contour of the thermal grease from a top-down perspective) and a thickness, so as to accurately control the amount of thermal grease used and reduce grease waste;

[0033] The cover plate 3 is also made of metal or hard plastic and is used to assist in determining the relative position of the rectifier bridge chip 401 with respect to the grease layer, aligning the center of the rectifier bridge chip 401 with the center of the grease layer. After alignment, press the rectifier bridge chip 401 so that the rectifier bridge chip 401 and the heat sink 402 are adhered together through the thermal grease. Then remove the cover plate 3, take out the adhered rectifier bridge chip 401 and heat sink 402, and manually insert bolts to tightly fix the rectifier bridge chip 401 and the heat sink 402 together.

[0034] As Figures 7-8 shown, the rectifier bridge 4 includes a rectifier bridge chip 401, a heat sink 402, bolts 403, nuts 404, and pins 405 extending from the side of the rectifier bridge chip 401. The rectifier bridge chip 401 has a structure similar to a cuboid, and the heat sink 402 has a cuboid structure. Through holes are provided at the centers of both the rectifier bridge chip 401 and the heat sink 402. The bolts are inserted through the top of the rectifier bridge chip 401, and the nuts are screwed onto the bolts from the bottom of the heat sink 402.

[0035] The base 1 includes a base body 101 and a heat sink groove 102. A heat sink groove 102 with an inner wall dimension corresponding to the outer wall dimension of the heat sink 402 is provided at the top of the base body 101. The heat sink groove 102 is a sunken groove with an open top. During use, first place the heat sink 402 into the heat sink groove 102 to restrict the position of the heat sink 402 on the base body 101.

[0036] In this application, there are multiple heat sink grooves 102, grease grooves 202, and chip grooves 302, which are regularly distributed, such as Figure 1 the matrix arrangement in, and multiple rectifier bridges 4 can be assembled at one time.

[0037] A nut groove 104 is provided at the center of the bottom of the heat sink groove 102. The nut groove 104 can be selected as a hexagonal sunken groove or other shapes, as long as it can hold the nut 404 and restrict the nut 404 from moving.

[0038] Pick-and-place grooves 103 are provided on both sides of the heat sink groove 102. The pick-and-place grooves 103 are arc-shaped grooves. When picking and placing the heat sink 402, pinch the heat sink 402 from both sides with fingers, and the fingertips of the fingers are located in the pick-and-place grooves 103, which is convenient for picking and placing the heat sink 402.

[0039] The depth of the heat sink groove 102 is not greater than the height of the heat sink 402, so that after the heat sink 402 is placed in the heat sink groove 102, the top end of the heat sink 402 is flush with the top end of the base body 101 or higher than the top end of the base body 101. In this way, when the patch 2 is placed on the base 1, the bottom surface of the patch 2 is at least in contact with the top surface of the heat sink 402 without gaps. When applying thermal grease, the thermal grease cannot leak from the gaps, ensuring that a plane contour identical to the shape of the thermal grease groove 202 is formed at the bottom of the thermal grease layer.

[0040] The patch 2 includes a thin sheet 201 and a thermal grease groove 202. A thermal grease groove 202 with its center aligned with the center of the heat sink groove 102 is provided on the thin sheet 201. The inner wall dimensions of the thermal grease groove 202 correspond to the outer wall dimensions of the rectifier bridge chip 401, and the thermal grease groove 202 is a through groove.

[0041] During use, the thin sheet 201 is placed on the base body 101 so that the center of the thermal grease groove 202 is aligned with the center of the heat sink groove 102. Then, thermal grease is applied to the surface of the thin sheet 201, and the thermal grease fills a thermal grease layer in the thermal grease groove 202 that has the same shape as the thermal grease groove 202.

[0042] The thickness of the thermal grease layer is determined by the thickness of the thin sheet 201. The thin sheet 201 can be made as thin as possible, but it should ensure that the thermal grease layer has sufficient thickness so that after the rectifier bridge chip 401 and the heat sink 402 are pressed together, they can be in full contact without gaps or voids.

[0043] The cover plate 3 includes a plate body 301 and a chip groove 302. A chip groove 302 with its center aligned with the heat sink groove 102 is provided on the plate body 301. The inner wall dimensions of the chip groove 302 correspond to the outer wall dimensions of the rectifier bridge chip 401, and the chip groove 302 is a through groove, so that the through hole at the center of the rectifier bridge chip 401 placed in the chip groove 302 is aligned with the through hole at the center of the heat sink 402 placed in the heat sink groove 102, facilitating the subsequent insertion of the bolt 403.

[0044] A pin slot 303 is provided at one end of the chip groove 302, and the pin slot 303 is also a through groove. When the rectifier bridge chip 401 is placed in the chip groove 302, the pins 405 naturally fall into the pin slot 303, facilitating the pins 405 to maintain a natural straight state and avoiding bending or breaking.

[0045] An overflow groove 306 is provided at the bottom of the side wall of the chip groove 302, specifically as Figures 5-6 shown. The overflow groove 306 is an arc-shaped groove with an opening facing the center of the chip groove 302.

[0046] To ensure that the thermal grease can be fully filled between the rectifier bridge chip 401 and the heat sink 402, a little more thermal grease than the actual amount should be applied. However, it should be ensured that the extra thermal grease is in a small amount, and when observing the rectifier bridge 4 externally, there is no obvious overflow of the thermal grease, and the overflowed thermal grease is distributed regularly, rather than the situation where the thermal grease overflowing on the front, back, left, and right sides of the rectifier bridge chip 401 is unevenly distributed.

[0047] The function of the overflow groove 306 here is that when a small amount of thermal grease overflows, the overflowed grease is located inside the overflow groove 306 and will not directly adhere to the side wall of the chip groove 302. First, it makes the edge of the overflowed thermal grease maintain a regular cylindrical shape similar to natural extrusion, which is more beautiful compared to the irregular edge shape formed by extrusion and pulling and drawing after contacting the side wall of the chip groove 302. Second, it reduces the situation of frequently cleaning the thermal grease adhered to the cover plate 3 later.

[0048] This tooling also includes a positioning structure. The positioning structure includes several positioning pins 105 (two are taken as examples in this application) fixed on the top of the base 1, a first positioning hole 203 opened on the patch 2, and a second positioning hole 304 opened on the cover plate 3. The first positioning hole 203 and the second positioning hole 304 are aligned with the positioning pins 105.

[0049] The two positioning pins 105 are respectively located at the diagonal positions of the seat body 101. The positions of the first positioning hole 203 and the second positioning hole 304 correspond to the positioning pins 105. When the patch 2 is placed on the base 1, the positioning pins 105 are inserted into the first positioning hole 203 to ensure that the grease layer shaped by the patch 2 is aligned with the center of the heat sink 402 limited on the base 1. When the cover plate 3 is placed on the base 1, the positioning pins 105 are inserted into the second positioning hole 304 to ensure that the rectifier bridge chip 401 limited by the cover plate 3 is also aligned with the center of the heat sink 402 limited on the base 1, that is, the centers of the rectifier bridge chip 401, the grease layer, and the heat sink 402 are aligned, meeting the assembly conditions.

[0050] In this application, the seat body 101, the thin sheet 201, and the plate body 301 are all in the shape of a cuboid. A pinch piece 204 is integrally formed at the corner of the thin sheet 201 near the first positioning hole 203. When picking up or putting down the thin sheet 201, hold the pinch piece 204 to pick up or put down the thin sheet 201; a pull ring 305 is fixedly connected at the corner of the plate body 301 near the second positioning hole 304, and the plate body 301 is picked up or put down through the pull ring 305 to avoid the situation that it is not easy to pick up due to the tight adhesion between the thin sheet 201, the plate body 301 and the base 1.

[0051] Working principle: For use, first place the nut 404 in the nut groove 104, then place the heat sink 402 in the heat sink groove 102. Next, place the thin sheet 201 on the base body 101, insert the positioning pin 105 into the first positioning hole 203, hold the thin sheet 201, and make the thin sheet 201 closely fit the top surface of the heat sink 402. Then, apply a layer of thermal grease on the surface of the thin sheet 201, and the thermal grease fills in the grease groove 202 to form a grease layer, which is located on the top surface of the heat sink 402. Then remove the thin sheet 201, place the plate body 301 on the base body 101, insert the positioning pin 105 into the second positioning hole 304, then place the rectifier bridge chip 401 into the chip groove 302. Next, insert the bolt 403 into the through hole at the center of the rectifier bridge chip 401 and tighten it with the nut 404. After tightening, remove the plate body 301, and then take out the assembled rectifier bridge 4.

[0052] During the assembly process, since the rectifier bridge chip 401 is limited by the chip groove 302 and the heat sink 402 is limited by the heat sink groove 102, relative rotation, displacement, etc. will not occur when the screw is screwed in between the two, thus avoiding the situation where the bolt drives the rectifier bridge chip 401 to rotate and slip, and improving the assembly efficiency.

[0053] The above is only the preferred specific implementation mode of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution and the inventive concept of the present utility model, makes equivalent replacement or change, and should be covered within the protection scope of the present utility model.

[0054] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0055] Although the embodiments of the present utility model have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present utility model. Those of ordinary skill in the art can make changes, modifications, replacements, and variations to the above embodiments within the scope of the present utility model.

Claims

1. An integrated tool for screwing the rectifier bridge, characterized in that: It comprises a base (1) for limiting the position of a heat sink (402), a patch (2) for shaping the shape of a silicone grease layer on the top of the heat sink (402), and a cover plate (3) for positioning a rectifier bridge chip (401) on the top of the silicone grease layer, wherein the patch (2) and the cover plate (3) are sequentially detachably arranged on the top of the base (1).

2. The integrated tooling for screwing a rectifier bridge according to claim 1, characterized in that: The base (1) comprises a base body (101) and a heat sink groove (102); the top of the base body (101) is provided with a heat sink groove (102) whose inner wall size corresponds to the outer wall size of the heat sink (402); the heat sink groove (102) is a sunken groove with an opening at the top.

3. The integrated tool for screwing a rectifier bridge according to claim 2, characterized in that: A nut slot (104) is provided at the bottom center of the heat sink slot (102).

4. The integrated tool for screwing a rectifier bridge according to claim 2, characterized in that: The heat sink groove (102) is provided with access grooves (103) on both sides.

5. The integrated tool for screwing a rectifier bridge according to claim 2, characterized in that: The depth of the heat sink groove (102) is no greater than the height of the heat sink (402).

6. The integrated tooling for screwing a rectifier bridge according to claim 2, characterized in that: The patch (2) comprises a thin sheet (201) and a silicone grease groove (202); the thin sheet (201) is provided with a silicone grease groove (202) whose center is aligned with the heat sink groove (102); the inner wall size of the silicone grease groove (202) corresponds to the outer wall size of the rectifier bridge chip (401); and the silicone grease groove (202) is a through groove.

7. The integrated tool for screwing a rectifier bridge according to claim 2, characterized in that: The cover plate (3) comprises a plate body (301) and a chip slot (302); the plate body (301) is provided with a chip slot (302) whose center is aligned with the heat sink slot (102); the inner wall size of the chip slot (302) corresponds to the outer wall size of the rectifier bridge chip (401); and the chip slot (302) is a through slot.

8. The integrated tool for screwing a rectifier bridge according to claim 7, characterized in that: A pin slot (303) is provided at one end of the chip slot (302).

9. The integrated tool for screwing a rectifier bridge according to claim 7, characterized in that: An overflow groove (306) is provided at the bottom of the side wall of the chip groove (302).

10. The integrated tool for screwing a rectifier bridge according to claim 1, characterized in that: The device also comprises a positioning structure, the positioning structure comprising a plurality of positioning pins (105) fixed on the top of the base (1), a first positioning hole (203) formed on the patch (2), and a second positioning hole (304) formed on the cover plate (3), wherein the first positioning hole (203) and the second positioning hole (304) are aligned with the positioning pins (105).

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