A riveting fixture for a fan bracket

Abstract

This invention discloses a riveting fixture for a fan frame, belonging to the field of riveting equipment technology. It includes a lower template supporting the fan frame, and an upper template above the lower template that mates with the fan frame. The lower template includes a lower support plate, and the top surface of the lower support plate has downward-pushing blocks slidably arranged around the fan frame. The inner side of each downward-pushing block has a riveting punch corresponding to a riveting hole on the fan frame. The upper template includes an upper support plate, and the bottom surface of the upper support plate has upward-pushing blocks that mate with the outer sides of the downward-pushing blocks. The upper support plate also has an opening support extending into the fan frame. By shortening the distance between the upper and lower templates, the opening support enters and forms a close fit with the inner wall of the fan frame; the inner side of the upward-pushing block and the outer side of the downward-pushing block press against each other, at which point the riveting punch enters the riveting hole, thereby achieving a convenient and precise riveting operation.

Description

Technical Field

[0001] This invention belongs to the field of riveting equipment technology, specifically a riveting fixture for a fan frame. Background Technology

[0002] Cooling fans are essential components in modern server chassis. These fans are mounted in fan mounts, which secure them to the chassis for easy installation and stable operation. Fan mounts are typically made of sheet metal and, due to their complex structure, are usually assembled from multiple sheet metal parts riveted together. One type of fan mount suitable for 4U chassis consists of a U-shaped base frame, left and right side panels, a central partition, and other parts, connected by 46 riveting points.

[0003] Sheet metal riveting typically involves two methods: rivet riveting and pull riveting. Rivet riveting, done manually with a rivet gun, uses standard rivets to connect each hole one by one. This method is inefficient and prone to issues like uneven rivets or protruding ends, which can affect fan installation and is rarely used. Pull riveting involves creating a hole in the sheet metal body, machining a tapered hole on the corresponding part, and then flipping the material from the hole onto the tapered hole to form a connection. Pull riveting requires specialized tools and can complete one or more holes at a time. Pull riveting offers better quality and higher efficiency, but requires specialized tools and equipment and demands a higher level of technical skill.

[0004] The current 4U fan mounting bracket has several problems with its vacuum riveting method: 1. The structure is complex, consisting of 8 individual parts with 46 riveting points distributed across 4 surfaces. Normally, each surface needs to be riveted separately. Since the press moves up and down during riveting, the rivet holes must face upwards, and the bottom of the holes requires a sturdy support surface. Riveting 46 points requires at least 4 operations. Because the fan mounting bracket is a blind-bottomed square box, the support structure must be designed as a cantilever beam, resulting in poor stress distribution and easy deformation under stress, leading to loose and unreliable riveting. 2. The fan mounting bracket is divided into 6 small compartments by partitions, further reducing the rigidity of the cantilever beam supporting the riveting. Support needs to be provided through the side holes of the fan mounting bracket, transforming it into a simply supported beam structure to improve stress and deformation. This makes the process of loading and unloading parts cumbersome and reduces manufacturing efficiency. Summary of the Invention

[0005] To address the current cumbersome riveting operation of fan mounting brackets and the lack of effective support for the inner wall of the fan mounting bracket during riveting, this invention provides a riveting fixture for fan brackets.

[0006] This invention is achieved through the following technical solution:

[0007] A riveting fixture for a fan bracket, used for riveting a U-shaped fan mounting bracket, includes a lower template supporting the fan mounting bracket, an upper template above the lower template that mates with the fan mounting bracket, the lower template including a lower support plate, and a pusher block slidably disposed around the fan mounting bracket on the top surface of the lower support plate; the inner side of the pusher block is provided with a riveting punch that corresponds to the riveting holes on the fan mounting bracket.

[0008] The upper template includes an upper support plate, and the bottom surface of the upper support plate is provided with upper push blocks that respectively cooperate with the outer side of the lower push block; the upper support plate is also provided with an opening support member extending into the fan fixing frame.

[0009] The fan mounting bracket is placed on the lower support plate of the lower template. The lower push block is equipped with a riveting punch corresponding to the riveting hole on the fan mounting bracket. By shortening the distance between the upper and lower templates, the support component is opened and enters to form a close fit with the inner wall of the fan mounting bracket, which helps to prevent deformation of the fan mounting bracket during riveting and improves the riveting quality. The inner side of the upper push block and the outer side of the lower push block are pressed into contact, thereby pushing the lower push block closer to one side of the fan mounting bracket for close fit. At this time, the riveting punch enters the riveting hole, thereby realizing a convenient and precise riveting operation.

[0010] A further improvement of the present invention is that the aforementioned opening support member includes a plurality of support blocks spaced apart along the length direction of the fan mounting frame; the plurality of support blocks are, in sequence, a first end support block, at least one middle support block, and a second end support block. The plurality of support blocks are correspondingly arranged along the length direction inside the fan mounting frame, which helps to avoid the situation where a single, integrated opening support member would fail, resulting in the entire fan mounting frame being unable to receive effective support. It also complements the partition layout inside the fan mounting frame. In particular, the first and second end support blocks also support the inner end faces of the fan mounting frame along its length. The plurality of support blocks effectively improves the success rate of supporting the inside of the fan mounting frame and simultaneously allows for the replacement or repair of individual support blocks.

[0011] A further improvement of the present invention is that each of the aforementioned support blocks includes a spreading member and a push plate that cooperates with the spreading member to support the fan mounting bracket; the spreading member is fixedly mounted on the upper support plate, and the push plate is rotatably mounted on the upper support plate and can slide along the height direction of the spreading member; the spreading member has an overall structure that is larger at the top and smaller at the bottom, and a guide protrusion is provided on the side of the spreading member; the push plate has an overall structure that is smaller at the top and larger at the bottom, and a guide groove that cooperates with the guide protrusion is provided on the push plate. As the distance between the upper and lower templates gradually increases, the spreading member pushes the push plate outward to achieve contact between the push plate and the fan mounting bracket, thereby forming an inside-out support for the fan mounting bracket; the cooperation between the guide groove and the guide protrusion can prevent lateral displacement and affect the internal support effect on the fan mounting bracket.

[0012] A further improvement of the present invention is that the first end support block includes a first end spreading member and a first end push plate; the second end support block includes a second end spreading member and a second end push plate; and the middle support block includes a middle spreading member and middle push plates disposed on both sides of the middle spreading member. The first end push plate, the second end push plate, and the plurality of middle push plates cooperate with each other to form a mating structure that can support the inner wall of the fan mounting bracket, which helps to improve the support stability of the fan mounting bracket during riveting.

[0013] A further improvement of the present invention is that the aforementioned second end support block further includes two second end push plates II that cooperate with the second end spreading member. The two second end push plates II are distributed in the width direction relative to the fan mounting bracket. The two second end push plates II can respectively support the two long sides of the fan mounting bracket. With the help of the two second short push plates II closest to the first second end push plate, the support and fixation of the two side plates of the fan mounting bracket in the length direction is improved. Together with the first end push plate, the support of the end of the fan mounting bracket is completed, thereby improving the cooperation of the riveting operation.

[0014] A further improvement of the present invention is that the upper support plate is also provided with a pressure plate sleeved on the outside of the supporting member, and a first compression spring is provided between the pressure plate and the upper support plate; a second compression spring is provided between the pressure plate and the push plate. Under the combined action of the first compression spring, the second compression spring and the pressure plate, the push plate can be formed in the initial state with the push plate lower than the supporting member. In use, the push plate enters the fan mounting bracket before the supporting member. As the upper support plate approaches the fan mounting bracket, the supporting member and the push plate cooperate to form a support and fit against the inner wall of the fan mounting bracket, thereby improving the stability of the riveting.

[0015] A further improvement of the present invention is that a cylindrical elastic rubber component is sleeved on the outside of the aforementioned riveting punch. The riveting punch enables the riveting of the fan mounting bracket's riveting holes. When the riveting punch approaches the fan mounting bracket, the cylindrical elastic rubber component compresses the fan mounting bracket, preventing misalignment between the riveting punch and the riveting holes, thus improving the accuracy of riveting the fan mounting bracket's riveting holes.

[0016] A further improvement of the present invention is that a third compression spring is provided on the lower part of the side of the push block near the fan mounting bracket. When the upper templates approach each other, the inner side of the push block and the outer side of the push block gradually come into contact and are squeezed, causing the push block to move towards the fan mounting bracket. After the riveting operation is completed, the upper template and the lower template separate, and the push block, under the rebound force of the third compression spring, completes the separation state from the fan mounting bracket, i.e., the initial state, so that the fan mounting bracket can be picked up and put down at this time.

[0017] A further improvement of the present invention is that the inner side of the aforementioned upper push block is provided with a first inner boss; the outer side of the lower push block is provided with a first outer boss that can cooperate with the first inner boss; the surfaces of the first inner boss and the first outer boss are inclined to cooperate with each other. By forming a mutual cooperation between the first inner boss and the first outer boss, the inclined boss surfaces can convert vertical up-and-down movement into horizontal movement, which helps to push the lower push block toward the fan mounting bracket.

[0018] A further improvement of the present invention is that the lower support plate is also provided with a second limiting member, which is distributed on three sides of the push block near the fan mounting bracket. Considering that the push block is slidably disposed on the lower support plate, the second limiting member can provide a reference position for the placement of the push block on the lower support plate, which helps to improve the assembly efficiency of the component.

[0019] As can be seen from the above technical solution, the beneficial effects of the present invention are as follows: the fan mounting bracket is placed on the lower support plate of the lower template, and the lower push block is provided with a riveting punch corresponding to the riveting hole on the fan mounting bracket. By shortening the distance between the upper and lower templates, the support member is opened and enters to form a close support with the inner wall of the fan mounting bracket, which helps to prevent deformation of the fan mounting bracket during riveting and improves the riveting quality; the inner side of the upper push block and the outer side of the lower push block are pressed and contacted, thereby pushing the lower push block closer to one side of the fan mounting bracket for close contact. At this time, the riveting punch enters the riveting hole, thereby realizing a convenient and precise riveting operation.

[0020] The upper support plate, serving as the supporting component for the upper positioning plate, pressure back plate, and pressure plate, provides two main benefits: firstly, it offers a strong support structure; secondly, different components can be replaced according to different specifications of the fan mounting bracket to achieve matching support for the inner wall of the fan mounting bracket. Since the expanding member and the push plate can slide relative to each other vertically, and the expanding member is in a relatively fixed state, while the push block is connected to the pressure plate via a second compression spring, and considering the structure of the push plate and expanding member, initially, the cross-section of the entire support block is relatively small, allowing it to smoothly enter the interior of the fan mounting bracket. As the support block approaches the fan mounting bracket, the lower end of the push plate first contacts the inner bottom surface of the fan mounting bracket. As the support block continues to move closer to the fan mounting bracket, the cross-section of the support block increases due to the cooperation of the expanding member and the push plate, until the lower end of the expanding member contacts the inner bottom surface of the fan mounting bracket. This completes the opening state of the support block, at which point the side walls of the fan mounting bracket to be riveted are all in a state of open support formed by the supported block inside the fan mounting bracket. First, the second compression spring is compressed between the push plate and the pressure plate, increasing the overlap between the push plate and the support member in terms of vertical height, achieving pre-contact of the support block inside the fan mounting bracket. The distance between the upper support plate and the fan mounting bracket is further reduced, and the distance between the upper positioning plate and the pressure back plate is compressed. The first compression spring in between is further compressed. During the compression of the first compression spring, the support block descends as a whole relative to the fan mounting bracket, providing stable support to the inner wall of the fan mounting bracket and providing a stable preparation for the riveting operation. Simultaneously, the upper push plate and the lower push plate move relative to each other, with the inner side of the upper push plate abutting against the outer side of the lower push plate and contacting the inclined boss on the side, thus horizontally pushing the lower push plate towards the side of the fan mounting bracket. The elastic rubber part on the outside of the riveting punch first contacts the outer wall of the fan mounting bracket, also for the purpose of further compression, causing the elastic rubber part to press tightly against the fan mounting bracket, allowing the riveting punch to perform the riveting operation on the fan mounting bracket. This allows the fan mounting bracket to be internally supported during the riveting process, while also enabling all riveting requirements to be met in a single operation. Attached Figure Description

[0021] To more clearly illustrate the technical solution of the present invention, the accompanying drawings used in the description will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the first structure of the upper and lower templates in this invention.

[0023] Figure 2This is a schematic diagram of the second structure of the upper and lower templates in this invention.

[0024] Figure 3 This is a schematic diagram of the exploded structure of the upper template in this invention.

[0025] Figure 4 This is a cross-sectional schematic diagram of the upper template in this invention.

[0026] Figure 5 This is a schematic diagram of the first combination of the support block and the pressure plate in this invention.

[0027] Figure 6 This is a schematic diagram of the second combination of the support block and the pressure plate in this invention.

[0028] Figure 7 This is a schematic diagram of one of the push-up block structures in this invention.

[0029] Figure 8 This is a schematic diagram of another push-up block structure in this invention.

[0030] Figure 9 This is a schematic diagram of the lower template structure in this invention.

[0031] Figure 10 This is a schematic diagram of the exploded structure of the lower template in this invention.

[0032] Figure 11 This is a schematic diagram of the first cross-sectional structure of the lower template in this invention.

[0033] Figure 12 This is a schematic diagram of the second cross-sectional structure of the lower template in this invention.

[0034] Figure 13 This is a schematic diagram of one of the push-down block structures in this invention.

[0035] Figure 14 for Figure 13 An explosion diagram.

[0036] Figure 15 for Figure 13 A schematic diagram of the outer structure.

[0037] Figure 16 This is a schematic diagram of another push-down block structure in this invention.

[0038] Figure 17 for Figure 16 An explosion diagram.

[0039] In the attached diagram: 100, upper support plate; 110, upper positioning plate; 120, pressure back plate; 121, first compression spring; 130, pressure plate; 131, pressure hole; 140, upper push block; 141, first inner boss; 142, second inner boss; 150, opening support member; 151, middle opening member; 152, middle push plate; 153, first end opening member; 154, first end push plate; 155, second end opening member; 156 157. Second end push plate 1; 158. Second end push plate 2; 200. Second compression spring; 210. Lower support plate; 211. Lower positioning plate; 212. First limiting member; 213. Second limiting member; 214. Positioning hole; 220. Lower push block; 221. First outer boss; 222. Second outer boss; 223. Third compression spring; 230. Riveting back plate; 231. Riveting punch; 232. Elastic rubber part; 300. Fan fixing bracket. Detailed Implementation

[0040] To make the objectives, features, and advantages of this invention more apparent and understandable, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings of the specific embodiments. Obviously, the embodiments described below are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this patent, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this patent.

[0041] As attached Figure 1-17 As shown, a riveting fixture for a fan bracket is used to rivet a U-shaped fan mounting bracket 300. It includes a lower template supporting the fan mounting bracket 300, the lower template comprising a lower support plate 200, and a lower positioning plate 210 that supports the fan mounting bracket 300. The lower positioning plate 210 has positioning holes 213 that can engage with structural components protruding from the bottom surface of the fan mounting bracket 300 to ensure that the fan mounting bracket 300 can be stably placed on the lower positioning plate 210. The lower positioning plate 210 is also surrounded by first limiting members 211 that extend above its upper surface, guiding the fan mounting bracket 300 to be stably placed on the lower positioning plate 210.

[0042] As attached Figure 10-12 As shown, the top surface of the lower support plate 200 is slidably provided with push blocks 220 distributed around the fan mounting bracket 300; the inner side of the push blocks 220 is provided with a riveting back plate 230, and the riveting back plate 230 is provided with a riveting punch 231 that corresponds to the riveting holes on the fan mounting bracket 300. The riveting punch 231 can be used to rivet the holes on the fan mounting bracket 300 to be riveted.

[0043] As attached Figure 13-17 As shown, a cylindrical elastic rubber part 232 is sleeved on the outside of the riveting punch 231. The riveting punch 231 can be used to rivet the riveting holes of the fan mounting bracket 300. When the riveting punch 231 approaches the fan mounting bracket 300, the cylindrical elastic rubber part 232 can squeeze the fan mounting bracket 300 to prevent the riveting punch 231 from misaligning with the riveting hole, which helps to improve the accuracy of riveting the riveting holes of the fan mounting bracket 300.

[0044] As attached Figure 13-17 As shown, a third compression spring 223 is also provided on the lower part of the side of the push block 220 near the fan mounting bracket 300. The third compression spring 223 is located on the push block 220 below the riveting back plate 230, and the axis of the third compression spring 223 is perpendicular to the inner side of the push block 220. When the upper templates approach each other, the inner side of the upper push block 140 gradually contacts and is squeezed against the outer side of the push block 220, causing the push block 220 to move towards the fan mounting bracket 300. After the riveting operation is completed, the upper template and the lower template separate vertically. Under the rebound force of the third compression spring 223, the push block 220 completes the separation state from the fan mounting bracket 300, i.e., the initial state, so that the fan mounting bracket 300 can be picked up and put down at this time.

[0045] As attached Figure 10 As shown, the lower support plate 200 is also provided with a second limiting member 212, which is distributed on three sides of the push block 220 near the fan mounting bracket 300. Considering that the push block 220 is slidably disposed on the lower support plate 200, the second limiting member 212 can provide a reference position for the placement of the push block 220 on the lower support plate 200, which helps to improve the assembly efficiency of the component.

[0046] As attached Figure 3-6 As shown, an upper template is provided above the lower template to cooperate with the fan mounting bracket 300. The upper template includes an upper support plate 100, and an upper positioning plate 110 is provided on the bottom surface of the upper support plate 100. A pressure plate 130 is installed on the bottom surface of the upper positioning plate 110 through a pressure back plate 120. The bottom surface of the pressure plate 130 is provided with an opening support member 150 that corresponds to the fan mounting bracket 300 and can extend into the fan mounting bracket 300. The opening support member 150 enters and forms a close fit with the inner wall of the fan mounting bracket 300, which helps to prevent deformation of the fan mounting bracket 300 during riveting and improves the riveting quality.

[0047] As attached Figure 5 and 6As shown, the opening support 150 includes a plurality of support blocks spaced apart along the length of the fan mounting bracket 300; the plurality of support blocks are, in sequence, a first end support block, at least one middle support block, and a second end support block. The plurality of support blocks are correspondingly arranged along the length of the fan mounting bracket 300, which helps to avoid a malfunction when the opening support 150 is a single unit, resulting in the entire fan mounting bracket 300 failing to receive effective support. It also complements the partition layout inside the fan mounting bracket 300. In particular, the first and second end support blocks also support the inner end faces of the fan mounting bracket 300 along its length. The plurality of support blocks effectively improves the success rate of supporting the inside of the fan mounting bracket 300 and also allows for the replacement or repair of individual support blocks.

[0048] As attached Figure 5 and 6 As shown, each of the supporting blocks includes a spreading member and a push plate that cooperates with the spreading member to support the fan mounting bracket 300. The upper end of the spreading member passes through the pressure hole 131 of the pressure plate 130 and is fixed to the pressure back plate 120. The upper end of the spreading member passing through the pressure hole 131 ensures the stability of the spreading member. The upper end of the push plate is connected to the pressure plate 130 through a second compression spring 158, and the push plate can slide along the height direction of the spreading member. The spreading member has an overall structure that is larger at the top and smaller at the bottom, and the side of the spreading member is provided with a guide protrusion. The push plate has an overall structure that is smaller at the top and larger at the bottom, and the push plate is provided with a guide groove that cooperates with the guide protrusion. As the distance between the upper and lower templates gradually decreases, the supporting member pushes the push plate outward to achieve contact between the push plate and the fan mounting bracket 300, thereby forming an inside-out support for the fan mounting bracket 300. The cooperation between the guide groove and the guide protrusion can prevent lateral displacement, which would affect the internal support effect of the fan mounting bracket 300. The cross-sections of the guide protrusion and the guide groove are both dovetail-shaped, which can prevent the push block from separating from the supporting member.

[0049] As attached Figure 5 and 6 As shown, the first end support block includes a first end spreading member 153 and a first end push plate 154; the second end support block includes a second end spreading member 155 and a second end push plate 156; the middle support block includes a middle spreading member 151 and middle push plates 152 disposed on both sides of the middle spreading member 151. The first end push plate 154, the second end push plate 156, and the multiple middle push plates 152 cooperate with each other to form a mating structure that can support the inner wall of the fan mounting bracket 300, which helps to improve the support stability of the fan mounting bracket 300 when riveted.

[0050] As attached Figure 5 and 6As shown, the second end support block also includes two second end push plates 157 that cooperate with the second end spreader 155. The two second end push plates 157 are distributed in the width direction relative to the fan mounting bracket 300. The two second end push plates 157 can support the two long sides of the fan mounting bracket 300 respectively. With the help of the two second short push plates 156 closest to the second end push plate 156, the support and fixation of the two side plates of the fan mounting bracket 300 in the length direction is improved. Together with the first end push plate 154, the support of the end of the fan mounting bracket 300 is completed, thereby improving the cooperation of the riveting operation.

[0051] As attached Figure 4-6 As shown, a first compression spring 121 is provided between the upper positioning plate 110 and the pressure plate 120. The first compression spring 121 can compensate for the extension and retraction capacity of the second compression spring 158, thereby achieving support of the push plate for the inside of the fan mounting bracket 300. In order to ensure the connection between the upper positioning plate 110 and the pressure plate 120 under the action of gravity, the pressure plate 120 is slidably mounted on the upper positioning plate 110 via a guide rod, so as to assist in the cooperation with the first compression spring 121.

[0052] As attached Figure 3 , 4 As shown in Figures 7 and 8, the pressure plate 120 is also provided with an upper push block 140 mounted on the upper positioning plate 110 around its perimeter. The inner side of the upper push block 140 corresponds vertically to the outer side of the lower push block 220 in its initial position. As the distance between the upper and lower templates is shortened, the inner side of the upper push block 140 presses against the outer side of the lower push block 220, thereby pushing the lower push block 220 closer to one side of the fan mounting bracket 300 for contact. At this time, the riveting punch 231 enters the riveting hole, thereby realizing a convenient and precise riveting operation.

[0053] As attached Figure 7 , 8 As shown in Figures 13, 14, 15, 16, and 17, the inner side of the upper push block 140 is provided with a first inner boss 141; the outer side of the lower push block 220 is provided with a first outer boss 221 that can cooperate with the first inner boss 141; the surfaces of the first inner boss 141 and the first outer boss 221 are inclined to cooperate with each other. The first inner boss 141 and the first outer boss 221 cooperate with each other, and the inclined boss surfaces can convert vertical up-and-down movement into horizontal movement, which helps to push the lower push block 220 toward the fan mounting bracket 300.

[0054] The middle section of the inner side of the upper push block 140 is provided with a second inner boss 142, and the middle section of the outer side of the lower push block 220 is provided with a second outer boss 222 that cooperates with the second inner boss 142. The surfaces of the second inner boss 142 and the second outer boss 222 are inclined to cooperate with each other. The second inner boss 142 and the second outer boss 222 cooperate with each other, and the inclined boss surfaces can convert vertical up-and-down movement into horizontal movement, which helps to push the lower push block 220 toward the fan mounting bracket 300.

[0055] As attached Figure 4 As shown, the upper support plate 100 is also provided with a pressure plate 130 sleeved on the outside of the expansion member. A first compression spring 121 is provided between the pressure plate 130 and the upper support plate 100; a second compression spring 158 is provided between the pressure plate 130 and the push plate. Under the combined action of the first compression spring 121, the second compression spring 158 and the pressure plate, the push plate can be formed in the initial state with the push plate lower than the expansion member. In use, the push plate enters the fan mounting bracket 300 before the expansion member. As the upper support plate 100 approaches the fan mounting bracket 300, the expansion member and the push plate cooperate to form a support and fit against the inner wall of the fan mounting bracket 300, thereby improving the stability of the riveting.

[0056] The working principle of this device is as follows: The upper support plate 100 serves as a supporting component for the upper positioning plate 110, the pressure back plate 120, and the pressure plate 130. Firstly, it can provide a strong support structure. Secondly, different components can be replaced according to different specifications of the fan mounting bracket 300 to achieve matching support for the inner wall of the fan mounting bracket 300. Because the supporting member and the push plate can slide relative to each other vertically, and because the supporting member is in a relatively fixed state, the push block is connected to the pressure plate 130 through the second compression spring 158. Considering the structure of the push plate and the supporting member, in the initial state, the cross-section of the entire support block is relatively small, allowing it to smoothly enter the fan mounting bracket 300. As the support block approaches the fan mounting bracket 300, the lower end of the push plate first contacts the inner bottom surface of the fan mounting bracket 300. The support block continues to move closer to the fan mounting bracket 300, and with the cooperation of the supporting member and the push plate, the cross-section of the support block increases until the lower end of the supporting member contacts the inner bottom surface of the fan mounting bracket 300. This completes the opening state of the support block, at which point the sidewalls of the fan mounting bracket 300 to be riveted are all in a state of open support formed by the supported block inside the fan mounting bracket 300. First, the second compression spring 158 is compressed between the push plate and the pressure plate 130, increasing the overlap between the push plate and the support member in terms of vertical height, thus achieving pre-contact of the support block inside the fan mounting bracket 300. The distance between the locking upper support plate 100 and the fan mounting bracket 300 is further reduced, and the distance between the upper positioning plate 110 and the pressure back plate 120 is compressed. The first compression spring 121, located between them, is further compressed. During the compression of the first compression spring 121, the support block descends as a whole relative to the fan mounting bracket 300, providing stable support to the inner wall of the fan mounting bracket 300 and providing a stable preparation for the riveting operation. Simultaneously, the upper push plate and the lower push plate move relative to each other, with the inner side of the upper push plate abutting against the outer side of the lower push plate and contacting the inclined protrusion on the side, thus horizontally pushing the lower push plate towards the side closer to the fan mounting bracket 300. The elastic rubber part 232 on the outside of the riveting punch 231 first contacts the outer wall of the fan mounting bracket 300. The purpose is also to make the elastic rubber part 232 press tightly against the fan mounting bracket 300 during further compression, and the riveting punch 231 performs the riveting operation on the fan mounting bracket 300. In this way, the fan mounting bracket 300 can achieve internal support during the riveting process, and the entire riveting requirement can be completed in one operation.

[0057] The present invention discloses a riveting fixture for a fan frame. The fan mounting bracket 300 is placed on the lower support plate 200 of the lower template. The lower push block 220 is provided with a riveting punch 231 corresponding to the riveting hole on the fan mounting bracket 300. By shortening the distance between the upper and lower templates, the opening support member 150 enters and forms a close support with the inner wall of the fan mounting bracket 300, which helps to prevent deformation of the fan mounting bracket 300 during riveting and improves the riveting quality. The inner side of the upper push block 140 presses against the outer side of the lower push block 220, thereby pushing the lower push block 220 closer to one side of the fan mounting bracket 300 for close contact. At this time, the riveting punch 231 enters the riveting hole, thereby realizing a convenient and precise riveting operation.

[0058] The various embodiments in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0059] The terms "upper," "lower," "outer," "inner," etc., used in the specification, claims, and accompanying drawings of this invention are used to distinguish relative positional relationships and are not necessarily qualitative. It should be understood that such data can be interchanged where appropriate so that embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0060] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A riveting fixture for a fan bracket, used for riveting a fan mounting bracket (300) with a U-shaped structure, comprising a lower template supporting the fan mounting bracket (300), and an upper template above the lower template that mates with the fan mounting bracket (300), characterized in that, The lower template includes a lower support plate (200), and the top surface of the lower support plate (200) is slidably provided with push blocks (220) distributed around the fan mounting bracket (300); the inner side of the push blocks (220) is provided with rivet punches (231) that correspond to the rivet holes on the fan mounting bracket (300); the upper template includes an upper support plate (100), and the bottom surface of the upper support plate (100) is provided with upper push blocks (140) that respectively cooperate with the outer side of the push blocks (220); the upper support plate (100) is also provided with an opening support member (150) extending into the fan mounting bracket (300); the opening support member (150) includes spaced-apart members distributed along the length direction of the fan mounting bracket (300). Multiple support blocks; the multiple support blocks are sequentially a first end support block, at least one middle support block, and a second end support block; each support block includes a spreading member and a push plate that cooperates with the spreading member to support the fan mounting bracket (300); the spreading member is fixedly mounted on the upper support plate (100), and the push plate is rotatably mounted on the upper support plate (100) and can slide along the height direction of the spreading member; the spreading member has an overall structure that is larger at the top and smaller at the bottom, and the side of the spreading member is provided with a guide protrusion; the push plate has an overall structure that is smaller at the top and larger at the bottom, and the push plate is provided with a guide groove that cooperates with the guide protrusion; the spreading member includes a first end spreading member (153), a second end spreading member (155), and a middle spreading member (156). 51); the push plate includes a first end push plate (154), a second end push plate one (156), a second end push plate two (157), and a middle push plate (152); the first end support block includes a first end expansion member (153) and a first end push plate (154), the second end support block includes a second end expansion member (155) and a second end push plate one (156); the middle support block includes a middle expansion member (151) and middle push plates (152) respectively disposed on both sides of the middle expansion member (151); the second end support block also includes two second end push plates two (157) that cooperate with the second end expansion member (155), the two second end push plates two (157) are in the same position. The fan mounting bracket (300) is distributed in the width direction; the upper support plate (100) is also provided with a pressure plate (130) sleeved on the outside of the support member, and a first compression spring (121) is provided between the pressure plate (130) and the upper support plate (100); a second compression spring (158) is provided between the pressure plate (130) and the push plate; the cross-section of the guide protrusion and the guide groove in the support block is dovetail-shaped, and the two slide in fit; in the initial state, the cross-section of the entire support block is relatively small, and it can smoothly enter the interior of the fan mounting bracket (300). As the distance between the support block and the fan mounting bracket (300) is reduced, the lower end of the push plate first contacts the inner bottom surface of the fan mounting bracket (300);The support block is brought closer to the fan mounting bracket (300) during the operation. The expansion member and the push plate cooperate to increase the cross-section of the support block until the lower end of the expansion member contacts the inner bottom surface of the fan mounting bracket (300). This completes the opening state of the support block. At this time, the side walls of the fan mounting bracket (300) to be riveted are all in the state of being supported by the support block forming an open support inside the fan mounting bracket (300). First, the second compression spring (158) is compressed between the push plate and the pressure plate (130), increasing the overlap between the push plate and the expansion member in the vertical height, and realizing the pre-contact of the support block inside the fan mounting bracket (300). Two second end push plates (157) can support the two long sides of the fan mounting bracket (300) respectively. With the help of two second short push plates (156) closest to the second end push plate, the support and fixation of the two side plates of the fan mounting bracket (300) in the length direction is improved. Together with the first end push plate (154), the support of the end of the fan mounting bracket (300) is completed. Until the lower end of the support piece contacts the inner bottom surface of the fan mounting bracket (300), the opening state of the support block is completed. At this time, the side walls of the fan mounting bracket (300) to be riveted are all in the state of being supported by the support block forming an open support inside the fan mounting bracket (300).

2. The riveting fixture for a fan frame according to claim 1, characterized in that, The outside of the rivet punch (231) is fitted with a cylindrical elastic rubber part (232).

3. The riveting fixture for a fan frame according to claim 1, characterized in that, A third compression spring (223) is also provided on the lower part of the side of the push block (220) near the fan mounting bracket (300).

4. The riveting fixture for a fan frame according to claim 1, characterized in that, The inner side of the upper push block (140) is provided with a first inner boss (141); the outer side of the lower push block (220) is provided with a first outer boss (221) that can cooperate with the first inner boss (141); the surfaces of the first inner boss (141) and the first outer boss (221) are inclined to cooperate with each other.

5. The riveting fixture for a fan frame according to claim 1, characterized in that, The lower support plate (200) is also provided with a second limiting member (212), which is distributed on three sides of the lower push block (220) near the fan mounting bracket (300).

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