Cooling fan with graphite long carbon brush convenient to replace

Abstract

The utility model discloses a cooling fan convenient to replace a graphite long carbon brush, which comprises a fan unit, the fan unit comprises an outer frame and a motor main body matched with the outer frame for installation, when the graphite long carbon brush main body is installed, the graphite long carbon brush main body is pushed into an installation frame, encounters symmetrical clamping blocks and moves towards the inner wall; the clamping block drives the limiting rod to slide and compress the spring, after the graphite long carbon brush completely slides into the embedding groove, the clamping block is tightly attached to the two sides of the graphite long carbon brush under the action of the spring and is stably installed, then the pull rod is pulled to enable the rear cover to drive the installation frame to enter the fixing box through the connecting block, the reset spring is compressed, the rear cover is assembled, and the pull rod is released. The reset spring pushes the graphite long carbon brush to move towards the commutator and be tightly attached, only the rear cover needs to be simply disassembled, and the problems that the graphite long carbon brush is prone to abrasion and needs to be frequently overhauled and replaced, but when the graphite long carbon brush is arranged in the motor, part of components in the graphite long carbon brush need to be disassembled during replacement, complexity and time consumption are caused, and the motor damage risk exists are solved.

Description

Technical Field

[0001] This utility model relates to the field of cooling fan technology, and in particular to a cooling fan with a convenient replacement of graphite long carbon brushes. Background Technology

[0002] Cooling fans are key components for heat dissipation in many devices and systems. With the development of technology, the performance requirements for cooling fans are becoming increasingly stringent, especially in terms of wear resistance, heat dissipation efficiency, and operational stability. Graphite long carbon brushes are widely used in rotating machinery such as electric motors and generators due to their excellent conductivity, lubricity, and wear resistance.

[0003] Graphite long carbon brushes wear down continuously during operation, which means they require frequent maintenance and replacement. However, since the graphite long carbon brushes are securely placed inside the motor structure, technicians often need to disassemble some components inside the motor when performing replacement work. This process is not only tedious and time-consuming, but also poses potential risks, which may cause accidental damage or performance impact to other parts of the motor. Utility Model Content

[0004] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the present invention.

[0005] In view of the problems existing in the current cooling fan that facilitates the replacement of long graphite carbon brushes, this utility model is proposed.

[0006] Therefore, the purpose of this utility model is to provide a cooling fan that facilitates the replacement of graphite long carbon brushes. It is suitable for solving the problem that graphite long carbon brushes are prone to wear and require frequent maintenance and replacement. However, since they are built into the motor, the replacement requires disassembling some internal components, which is cumbersome, time-consuming, and poses a risk of damaging the motor.

[0007] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a cooling fan that facilitates the replacement of graphite long carbon brushes, comprising:

[0008] A fan unit includes an outer frame and a motor body that is matched and mounted to the outer frame. A fan body and a rear cover are mounted at both ends of the motor body. A shaft is installed in the inner cavity of the rear cover, and a commutator is installed on the outer surface of the shaft.

[0009] The replacement unit includes a fixing box symmetrically installed on the inner wall of the rear cover. A connecting block is slidably connected to the inner cavity of the fixing box. A limit plate is installed on one side of the connecting block. The inner wall of the fixing box has symmetrically formed sliding grooves that are slidably connected to the limit plate. A return spring is installed in the inner cavity of the fixing box, and one end of the return spring is fixedly connected to the side wall of the limit plate. A pull rod is installed on one side of the connecting block. An installation frame is installed on the side of the connecting block away from the limit plate. A fitting groove is formed on the inner wall of the installation frame. A graphite long carbon brush body is fitted into the inner cavity of the fitting groove, and one end of the graphite long carbon brush body is attached to the outer wall of the protective cover. Installation grooves are symmetrically installed on both sides of the inner cavity of the installation frame. A telescopic spring is installed in the inner cavity of the installation groove, and a limit rod is installed on the other end of the telescopic spring. A clamping block is installed at one end of every two sets of limit rods, and the side wall of the clamping block is attached to the side wall of the graphite long carbon brush body.

[0010] As a preferred embodiment of the cooling fan for easy replacement of graphite long carbon brushes described in this utility model, one side of the clamping block is provided as an arc surface, which facilitates the graphite long carbon brush body to squeeze the clamping block into the fitting groove.

[0011] As a preferred embodiment of the cooling fan for easy replacement of graphite long carbon brushes described in this utility model, both sets of fixing boxes have through holes installed on their side walls, and the through holes are slidably connected to the pull rod.

[0012] As a preferred embodiment of the cooling fan with convenient replacement of graphite long carbon brushes described in this utility model, a protective cover is installed on one side of the outer frame to protect the fan body from collisions with foreign objects.

[0013] As a preferred embodiment of the cooling fan for easy replacement of graphite long carbon brushes described in this utility model, threaded holes are provided at both ends and four corners of the outer frame to facilitate the installation of the device in a designated position.

[0014] As a preferred embodiment of the cooling fan for easy replacement of graphite long carbon brushes described in this utility model, wherein: a mounting component is installed at one end of the rear cover, and the mounting component is connected to the outer frame by bolts.

[0015] The beneficial effects of this utility model are as follows: When installing the graphite long carbon brush body, push it into the mounting frame, encounter the symmetrical clamping block and move it towards the inner wall. The clamping block drives the limiting rod to slide and compress the spring. After the graphite long carbon brush is completely slid into the fitting groove, the clamping block is pressed tightly against its two sides under the action of the spring, and is installed securely. Then, pull the pull rod to make the back cover drive the mounting frame into the fixing box through the connecting block, compress the return spring, assemble the back cover and release the pull rod. The return spring pushes the graphite long carbon brush towards the commutator and fits tightly. Only the back cover needs to be easily removed, which solves the problem that the graphite long carbon brush is easy to wear and needs to be frequently inspected and replaced. However, since it is built into the motor, it is necessary to disassemble some internal components when replacing it, which is cumbersome, time-consuming and has the risk of damaging the motor. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0017] Figure 1 A schematic diagram of the overall structure of a cooling fan that facilitates the replacement of graphite long carbon brushes, as proposed in this utility model.

[0018] Figure 2 A schematic diagram of the back structure of a cooling fan that facilitates the replacement of graphite long carbon brushes, as proposed in this utility model.

[0019] Figure 3 This is a schematic diagram of the internal structure of the rear cover of a cooling fan that facilitates the replacement of graphite long carbon brushes, as proposed in this utility model.

[0020] Figure 4 This is a schematic diagram of the replacement unit structure of a cooling fan with a convenient graphite long carbon brush, as proposed in this utility model.

[0021] Figure Descriptions: 100, Fan Unit; 101, Outer Frame; 102, Fan Body; 103, Protective Cover; 104, Motor; 105, Rear Cover; 106, Mounting Component; 107, Shaft; 108, Commutator; 200, Replacement Unit; 201, Fixing Box; 202, Mounting Frame; 203, Graphite Long Carbon Brush Body; 204, Pull Rod; 205, Clamping Block; 206, Mounting Slot; 207, Telescopic Spring; 208, Limiting Rod; 209, Return Spring; 210, Connecting Block; 211, Limiting Plate; 212, Fitting Slot. Detailed Implementation

[0022] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0023] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0024] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.

[0025] Secondly, this utility model is described in detail with reference to the schematic diagrams. When describing the embodiments of this utility model, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not adhering to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of this utility model. In addition, actual manufacturing should include the three-dimensional spatial dimensions of length, width, and depth.

[0026] Reference Figures 1-4 This invention provides a cooling fan with a convenient graphite long carbon brush replacement method, comprising a fan unit 100 and a replacement unit 200.

[0027] The fan unit 100 includes an outer frame 101 and a motor body 104 that is matched and installed with the outer frame 101. The two ends of the motor body 104 are equipped with a fan body 102 and a rear cover 105. The inner cavity of the rear cover 105 is equipped with a rotating shaft 107, and the outer surface of the rotating shaft 107 is equipped with a commutator 108. This is a relatively mature existing technology, and will not be elaborated on here.

[0028] The replacement unit 200 includes a fixing box 201 symmetrically installed on the inner wall of the rear cover 105. A connecting block 210 is slidably connected to the inner cavity of the fixing box 201. A limiting plate 211 is installed on one side of the connecting block 210. The inner wall of the fixing box 201 has symmetrically formed sliding grooves, which are slidably connected to the limiting plate 211. The limiting plate 211 slides within the sliding grooves to prevent the connecting block 210 from sliding out of the inner cavity of the fixing box 201. A return spring 209 is installed in the inner cavity of the fixing box 201, and one end of the return spring 209 is fixedly connected to the side wall of the limiting plate 211. A pull rod 204 is installed on one side of the connecting block 210, and an mounting rod 204 is installed on the side of the connecting block 210 away from the limiting plate 211. The mounting frame 202 has an inner wall with a fitting groove 212. A graphite long carbon brush body 203 is fitted into the inner cavity of the fitting groove 212, with one end of the graphite long carbon brush body 203 fitting against the outer wall of the protective cover 103. Mounting grooves 206 are symmetrically installed on both sides of the inner cavity of the mounting frame 202. A telescopic spring 207 is installed in the inner cavity of the mounting groove 206, and a limit rod 208 is installed at the other end of the telescopic spring 207. A clamping block 205 is installed at one end of every two sets of limit rods 208, and the side wall of the clamping block 205 fits against the side wall of the graphite long carbon brush body 203. When the graphite long carbon brush body 203 needs to be installed, it is inserted into the mounting frame. Inside the mounting frame 202, as the graphite long carbon brush body 203 is pushed in, it encounters symmetrically arranged clamping blocks 205 pre-set within the mounting frame 202. These clamping blocks move closer to the inner wall as the graphite long carbon brush body 203 moves. The displacement of the clamping blocks 205 causes the limiting rod 208 to slide within the mounting groove 206, compressing the telescopic spring 207 therein. When the graphite long carbon brush body 203 is fully slid into the specially designed fitting groove 212, the two sets of clamping blocks 205, under the action of the telescopic spring 207, are pressed tightly against both sides of the graphite long carbon brush body 203, ensuring its stable installation. Next, the pull rod 204 is pulled away from the rear cover 105. The rear cover 105 is pulled into the mounting frame 202 by the connecting block 210 and enters the fixed box 201. This action compresses the return spring 209. Then, the rear cover 105 is assembled to the tail of the motor body 104 and the pull rod 204 is released. At this time, the return spring 209 releases energy and pushes the connecting block 210 and the attached graphite long carbon brush body 203 toward the commutator 108 until the graphite long carbon brush body 203 is tightly attached to the surface of the commutator 108. Only the rear cover 105 needs to be removed. This solves the problem that graphite long carbon brushes are easy to wear and need to be frequently inspected and replaced. However, since they are built into the motor, the internal components need to be disassembled for replacement, which is cumbersome, time-consuming and poses a risk of damaging the motor.

[0029] One side of the clamping block 205 is designed as an arc surface to facilitate the graphite long carbon brush body 203 pressing the clamping block 205 into the fitting groove 212. When the graphite long carbon brush body 203 presses the clamping block 205, since the contact surface between the clamping block 205 and the graphite long carbon brush body 203 is arc-shaped, the clamping block 205 will be subjected to a pushing force towards the inner wall of the mounting frame 202 during the installation of the graphite long carbon brush body 203, thereby causing corresponding movement.

[0030] Both sets of fixing boxes 201 have through holes installed on their side walls, and the through holes are slidably connected to the pull rod 204 to facilitate the movement of the pull rod 204.

[0031] A protective cover 103 is installed on one side of the outer frame 101. The protective cover 103 is used to protect the fan body 102 from collisions with foreign objects.

[0032] The outer frame 101 has threaded holes at both ends and four corners to facilitate the installation of the device in the designated location.

[0033] A mounting piece 106 is installed at one end of the back cover 105, and the mounting piece 106 is connected to the outer frame 101 by bolts.

[0034] During use, when installing the graphite long carbon brush body 203, insert the graphite long carbon brush body 203 into the inner cavity of the mounting frame 202. As the graphite long carbon brush body 203 is pushed in, it encounters pre-set, symmetrically arranged clamping blocks 205 within the mounting frame 202. These clamping blocks move closer to the inner wall as the graphite long carbon brush body 203 moves. The displacement of the clamping blocks 205 causes the limiting rod 208 to slide within the mounting groove 206, compressing the telescopic spring 207 within it. When the graphite long carbon brush body 203 is completely slid into the specially designed fitting groove 212, the two sets of clamping blocks 205, under the action of the telescopic spring 207, adhere tightly to both sides of the graphite long carbon brush body 203, ensuring stable installation. Next, through... Pull the lever 204 away from the rear cover 105. The rear cover 105 is pulled into the mounting frame 202 by the connecting block 210 and enters the fixing box 201. This action compresses the return spring 209 at the same time. Then, the rear cover 105 is assembled to the tail of the motor body 104 and the lever 204 is released. At this time, the return spring 209 releases energy and pushes the connecting block 210 and the attached graphite long carbon brush body 203 toward the commutator 108 until the graphite long carbon brush body 203 is tightly attached to the surface of the commutator 108. Only the rear cover 105 needs to be removed. This solves the problem that graphite long carbon brushes are easy to wear and need to be frequently inspected and replaced. However, since they are built into the motor, the internal components need to be disassembled for replacement, which is cumbersome, time-consuming and has the risk of damaging the motor.

[0035] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A cooling fan with easy replacement of graphite long carbon brush, characterized by, Include: Fan unit (100), including outer frame (101) and motor body (104) installed with outer frame (101), both ends of the motor body (104) are installed with fan body (102) and rear cover (105), the inner cavity of the rear cover (105) is installed with rotating shaft (107), and the outer surface of the rotating shaft (107) is installed with commutator (108); The changing unit (200) includes a fixed box (201) symmetrically installed on the inner wall of the rear cover (105), the inner cavity of the fixed box (201) is slidably connected with a connecting block (210), one side of the connecting block (210) is installed with a limiting plate (211), the inner wall of the fixed box (201) is symmetrically provided with a sliding groove, and the sliding groove is slidably connected with the limiting plate (211), the inner cavity of the fixed box (201) is installed with a return spring (209), one end of the return spring (209) is fixedly connected with the side wall of the limiting plate (211), one side of the connecting block (210) is installed with a pull rod (204), the side away from the limiting plate (211) of the connecting block (210) is installed with a mounting frame (202), the inner wall of the mounting frame (202) is provided with a fitting groove (212), the inner cavity of the fitting groove (212) is embeddedly connected with a graphite long carbon brush body (203), one end of the graphite long carbon brush body (203) is attached to the outer wall of the protective cover (103), the inner cavity of the mounting frame (202) is symmetrically installed with a mounting groove (206) on both sides, the inner cavity of the mounting groove (206) is installed with a telescopic spring (207), and the other end of the telescopic spring (207) is installed with a limiting rod (208), one end of every two groups of limiting rods (208) is installed with a clamping block (205), and the side wall of the clamping block (205) is attached to the side wall of the graphite long carbon brush body (203).

2. A cooling fan with easy replacement of graphite long carbon brush as claimed in claim 1 wherein: One side of the clamping block (205) is arc-shaped, which facilitates the graphite long carbon brush body (203) to extrude the clamping block (205) and insert into the fitting groove (212).

3. A cooling fan with easy replacement of graphite long carbon brush as claimed in claim 1 wherein: The side wall of the two groups of fixed boxes (201) is installed with a through hole, and the through hole is slidably connected with the pull rod (204).

4. A cooling fan for easy replacement of a graphite long carbon brush according to claim 1, characterized in that: The outer frame (101) is installed with a protective cover (103) on one side, and the protective cover (103) is used to protect the fan body (102) from being collided by foreign matters.

5. A cooling fan for easy replacement of a graphite long carbon brush according to claim 1, characterized in that: The outer frame (101) is provided with threaded holes at two ends of four corners, which facilitates the installation of the device in the designated position.

6. A cooling fan for easy replacement of a graphite long carbon brush according to claim 1, characterized in that: One end of the rear cover (105) is installed with a mounting piece (106), and the mounting piece (106) is connected with the outer frame (101) through bolts.

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