A raw material mixing device for graphite carbon brush production

Abstract

The utility model relates to graphite carbon brush production technical field, and disclose a raw material mixing device for graphite carbon brush production, including mixing box, the upper end fixed mounting of mixing box has the motor, is provided with a plurality of groups of feeding cylinder to the upper end of mixing box, and the motor output shaft penetrates the inner wall of mixing box and is fixedly installed with the pivot, and the pivot surface is fixedly installed with a plurality of groups of stirring vane, and the lower end side wall of mixing box is provided with the discharge pipe, and the inside of mixing box is provided with the cleaning structure of scraping its inner wall, and the spiral flow guide groove on the scraper surface produces the guiding effect when rotating, and the scraped raw materials are guided to flow along the groove body quickly, and a plurality of groups of dredging holes can let part raw materials pass, and the auxiliary raw material disperses, prevents raw materials to accumulate and caking on the scraper surface, and the inclined flow guide plate rotates synchronously with the scraper, and the raw materials falling from the scraper are received, and the elastic baffle on both sides can effectively prevent the raw materials from leaking to both sides, ensure that the raw materials along the flow guide plate oblique direction steady backflow to the mixing system in the middle part of mixing box, avoid raw materials waste.

Description

Technical Field

[0001] This utility model relates to the field of graphite carbon brush production technology, specifically to a raw material mixing device for graphite carbon brush production. Background Technology

[0002] In the production process of graphite carbon brushes, the uniformity of raw material mixing directly affects the core indicators of carbon brushes such as conductivity and wear resistance. During production, graphite powder, binder and other raw materials need to be mixed in a specific ratio.

[0003] Existing raw material mixing devices for graphite carbon brush production typically consist of a mixing box, a motor, a rotating shaft, stirring blades, and a feeding and discharging structure. During operation, the motor drives the rotating shaft to rotate the stirring blades, mixing various raw materials fed into the feeding cylinder. After mixing, the raw materials are discharged through the discharge pipe. Usually, a scraper is also installed to scrape off the raw materials adhering to the inner wall of the mixing box when the rotating shaft rotates.

[0004] However, when this device is in use, sticky raw materials tend to adhere to the inner wall of the mixing chamber and the surface of the scraper. Simple scraper rotation cleaning is difficult to completely remove them. Long-term accumulation of raw materials will affect the uniformity of mixing. Moreover, the scraped raw materials tend to accumulate near the scraper and cannot be quickly dispersed and returned to the mixing system, affecting the mixing efficiency. In view of this, we propose a raw material mixing device for graphite carbon brush production. Utility Model Content

[0005] The purpose of this invention is to provide a raw material mixing device for the production of graphite carbon brushes, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a raw material mixing device for graphite carbon brush production, comprising a mixing box, a motor fixedly installed at the upper end of the mixing box, multiple sets of feeding cylinders provided at the upper end of the mixing box, a rotating shaft fixedly installed through the inner wall of the motor and the rotating shaft having multiple sets of stirring blades fixedly installed on its surface, a discharge pipe provided on the lower side wall of the mixing box, and a cleaning structure for scraping the inner wall of the mixing box. The cleaning structure includes connecting cylinders fixedly installed on both sides of the rotating shaft. A fixed cylinder is provided on the side wall of the connecting cylinder. One end of a compression spring is fixedly installed on the inner wall of the fixed cylinder. A sliding plate is fixedly installed on the other end of the compression spring. One end of a moving rod is fixedly installed on the side wall of the sliding plate. A scraper is fixedly installed on the other end of the moving rod. A guide groove is opened on the surface of the scraper. Multiple sets of unblocking holes are opened on the surface of the scraper.

[0007] Preferably, the cleaning structure further includes three sets of inclined guide plates fixedly installed on the side wall of the scraper, each inclined guide plate having elastic baffles fixedly installed on both sides, and three sets of ventilation holes opened on the surface of the inclined guide plates.

[0008] Preferably, a triangular block is fixedly installed at the lower end of the inclined guide plate, and the surface of the triangular block is provided with several sets of tooth grooves.

[0009] Preferably, the guide groove is spiral-shaped and there are multiple sets of guide grooves, which are arranged in an array on the surface of the scraper.

[0010] Preferably, a limit ring is detachably installed on the surface of the fixed cylinder, and the sliding plate is slidably connected to the inner wall of the fixed cylinder.

[0011] Preferably, the positions of the unblocking holes and the inclined guide plates are staggered.

[0012] Preferably, the surface of the connecting cylinder is provided with a positioning structure, the positioning structure including a clamping rod fixedly installed on the side wall of the fixed cylinder, the surface of the clamping rod is provided with a clamping hole, the surface of the fixed cylinder is provided with a limiting hole, and a T-shaped rod is inserted into the clamping hole and the limiting hole.

[0013] Compared with the prior art, this utility model provides a raw material mixing device for graphite carbon brush production, which has the following beneficial effects: 1. This raw material mixing device for graphite carbon brush production effectively solves the problem of adhesion and accumulation of sticky raw materials by setting up a cleaning mechanism, thereby improving the uniformity and efficiency of mixing. The scraper is always in close contact with the inner wall of the mixing box to scrape and clean. At the same time, the spiral guide groove on the surface of the scraper can guide the scraped raw materials to flow quickly, while the unblocking holes can help disperse the raw materials and prevent them from accumulating near the scraper. The inclined guide plate further receives the scraped raw materials, and the elastic baffles on both sides can prevent the raw materials from leaking to the side, allowing the raw materials to flow back stably to the mixing system along the guide plate, thereby improving the mixing efficiency.

[0014] 2. The raw material mixing device for graphite carbon brush production facilitates the installation and use of the scraper through the cooperation of the T-shaped rod and the clamping rod of the positioning structure. The clamping rod is positioned by inserting the clamping rod into the connecting cylinder and then inserting the T-shaped rod into the clamping hole and the limiting hole, thereby improving the installation efficiency of the device. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a cross-sectional view of the internal structure of the mixing box of this utility model; Figure 3 This is a partial structural diagram of the scraper part of this utility model; Figure 4 This is a partial exploded structural diagram of the connecting cylinder of this utility model; Figure 5 This is a schematic diagram of the exploded structure at the fixed cylinder of this utility model; Figure 6This is a schematic diagram of the inclined guide plate of this utility model.

[0016] In the diagram: 1. Mixing tank; 2. Motor; 3. Cleaning structure; 4. Positioning structure; 5. Feed cylinder; 6. Triangular block; 7. Toothed groove; 31. Connecting cylinder; 32. Fixing cylinder; 33. Compression spring; 34. Slide plate; 35. Moving rod; 36. Scraper; 37. Guide channel; 38. Unblocking hole; 39. Slanted guide plate; 310. Elastic sidewall; 311. Vent hole; 41. Locking rod; 42. Locking hole; 43. T-shaped rod. Detailed Implementation

[0017] like Figures 1-6 As shown, this utility model provides a technical solution: a raw material mixing device for graphite carbon brush production, including a mixing box 1, a motor 2 fixedly installed at the upper end of the mixing box 1, multiple sets of feeding cylinders 5 provided at the upper end of the mixing box 1, the output shaft of the motor 2 passes through the inner wall of the mixing box 1 and is fixedly installed with a rotating shaft, multiple sets of stirring blades are fixedly installed on the surface of the rotating shaft, a discharge pipe is provided on the lower side wall of the mixing box 1, and a cleaning structure 3 for scraping the inner wall of the mixing box 1 is provided inside the mixing box 1; The cleaning structure 3 includes connecting cylinders 31 fixedly installed on both sides of the rotating shaft. A fixing cylinder 32 is provided on the side wall of the connecting cylinder 31. One end of a compression spring 33 is fixedly installed on the inner wall of the fixing cylinder 32. A sliding plate 34 is fixedly installed on the other end of the compression spring 33. One end of a moving rod 35 is fixedly installed on the side wall of the sliding plate 34. A scraper 36 is fixedly installed on the other end of the moving rod 35. A guide groove 37 is formed on the surface of the scraper 36, and multiple sets of unblocking holes 38 are formed on the surface of the scraper 36. The cleaning structure 3 also includes three sets of inclined guide plates fixedly installed on the side wall of the scraper 36. 39. Both sides of the inclined guide plate 39 are fixedly installed with elastic baffles 310. Three sets of vent holes 311 are opened on the surface of the inclined guide plate 39. A triangular block 6 is fixedly installed at the lower end of the inclined guide plate 39. Several sets of toothed grooves 7 are opened on the surface of the triangular block 6. The guide groove 37 is set in a spiral shape and has multiple sets. Multiple sets of guide grooves 37 are opened in an array on the surface of the scraper 36. A limit ring is detachably installed on the surface of the fixed cylinder 32. The slide plate 34 is slidably connected to the inner wall of the fixed cylinder 32. The positions of the dredging hole 38 and the inclined guide plate 39 are staggered.

[0018] In this embodiment of the invention, according to the raw material ratio requirements for the production of graphite carbon brushes, graphite powder, binder, and other raw materials are fed into the mixing box 1 through multiple sets of feeding cylinders 5. During the feeding process, the feeding speed of the raw materials is controlled to avoid excessive accumulation of raw materials at one time, which would affect the subsequent mixing effect. Then, the power supply of the motor 2 is turned on, and the output shaft of the motor 2 drives the rotating shaft to rotate at a uniform speed. The rotating shaft synchronously drives the stirring blades on the surface and the cleaning structures 3 on both sides to rotate. The stirring blades stir the raw materials in the mixing box 1 in all directions at a preset speed, initially achieving the mixing of multiple raw materials. At this time, the compression spring 33 is always in an elastic extension state. The sliding plate 34 applies a continuous outward pushing force to the moving rod 35, causing the scraper 36 to closely adhere to the inner wall of the mixing box 1. As the rotating shaft rotates, the scraper 36 moves in a circular motion along the inner wall of the mixing box 1, thoroughly scraping off the sticky raw materials adhering to the wall surface, avoiding long-term accumulation of raw materials.

[0019] The spiral guide grooves 37 on the surface of the scraper 36 generate a guiding effect when rotating, guiding the scraped material to flow quickly along the groove. At the same time, multiple sets of unblocking holes 38 allow some material to pass through, assisting in material dispersion and preventing material from accumulating and agglomerating on the surface of the scraper 36. The inclined guide plate 39 rotates synchronously with the scraper 36, receiving the material sliding off the scraper 36. The elastic baffles 310 on both sides can effectively prevent material leakage to both sides, ensuring that the material flows back stably along the inclined direction of the guide plate to the mixing system in the middle of the mixing box 1, avoiding material waste. The vent holes 311 on the surface of the inclined guide plate 39 are connected to the scraper 36. The staggered arrangement of the unclog holes 38 balances the airflow within the mixing chamber 1, reducing airflow turbulence caused by stirring and preventing raw material dust from flying away. It also reduces the probability of raw materials re-adhering to the inner wall of the equipment due to flying dust. During rotation, the triangular block 6 at the lower end of the inclined guide plate 39 impacts and cuts the clumps of raw materials in the mixing system with its toothed grooves 7, breaking large clumps of raw materials into fine particles. This ensures that different raw materials can fully contact and mix, improving the uniformity of mixing. After the raw materials have been mixed for the preset time, the power to the motor 2 is turned off. After the rotating shaft has completely stopped rotating, the material can be discharged.

[0020] Please continue reading. Figures 1-6 The surface of the connecting cylinder 31 is provided with a positioning structure 4. The positioning structure 4 includes a locking rod 41 fixedly installed on the side wall of the fixed cylinder 32. The surface of the locking rod 41 is provided with a locking hole 42. The surface of the fixed cylinder 32 is provided with a limiting hole. A T-shaped rod 43 is inserted into the locking hole 42 and the limiting hole.

[0021] In this embodiment of the invention, during installation, the locking rod 41 on the side wall of the fixed cylinder 32 is first aligned with the inside of the connecting cylinder 31 and pushed in until the free end of the locking rod 41 is in contact with the bottom of the connecting cylinder 31. At this time, the fixed cylinder 32 and the connecting cylinder 31 are initially aligned, and the lateral displacement is restricted. The position can only be slightly adjusted along the axial direction of the connecting cylinder 31. The fixed cylinder 32 is slowly rotated or translated. The limiting hole on the surface of the fixed cylinder 32 and the locking hole 42 on the locking rod 41 are observed. When the centers of the two holes are completely aligned, the position is stopped. At this time, the longitudinal insertion part of the T-shaped rod 43 is aligned with the aligned limiting hole and locking hole 42 and inserted axially until the lateral gripping part is in close contact with the surface of the fixed cylinder 32. At this time, the T-shaped rod 43 passes through both the fixed cylinder 32 and the locking rod 41, restricting the axial movement of the locking rod 41 in the slot and the circumferential rotation of the fixed cylinder 32, realizing the rigid locking of the fixed cylinder 32 and the connecting cylinder 31, and preventing the connection from loosening due to vibration during equipment operation.

[0022] During operation, the user first inserts the clamping rod 41 into the connecting cylinder 31, then inserts the T-shaped rod 43 into the clamping hole 42 and the limiting hole. Next, raw materials such as graphite powder and binder are fed into the mixing chamber 1 through the feeding cylinder 5. The motor 2 is then started, and its output shaft drives the rotating shaft, stirring blades, and connecting cylinder 31 to rotate. The stirring blades mix the raw materials in the mixing chamber 1. At this time, the compression spring 33 pushes the sliding plate 34 to move outward along the inner wall of the fixed cylinder 32. The moving rod 35 drives the scraper 36 to tightly adhere to the inner wall of the mixing chamber 1. The rotating shaft then drives... The scraper 36 rotates synchronously to scrape off the raw materials adhering to the inner wall of the mixing box 1. During the scraping process, the spiral guide groove 37 on the surface of the scraper 36 guides the flow of the raw materials, the unblocking hole 38 assists in the dispersion of the raw materials and prevents the raw materials from accumulating on the surface of the scraper 36, the inclined guide plate 39 receives the scraped raw materials, the elastic baffle 310 prevents the raw materials from leaking to the side, the vent hole 311 balances the airflow and reduces the flying of raw materials, and the triangular block 6 and the toothed groove 7 break up the clumps of raw materials to ensure that the raw materials are fully mixed. After the mixing is completed, the discharge pipe is opened and the mixed raw materials are discharged.

[0023] The present invention has been described in detail above. However, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, any modifications or improvements that do not depart from the spirit of the present invention are within the protection scope of the present invention.

Claims

1. A raw material mixing device for graphite carbon brush production, comprising a mixing chamber (1), wherein a motor (2) is fixedly installed at the upper end of the mixing chamber (1), and multiple sets of feed cylinders (5) are provided at the upper end of the mixing chamber (1), wherein the output shaft of the motor (2) passes through the inner wall of the mixing chamber (1) and is fixedly installed with a rotating shaft, wherein multiple sets of stirring blades are fixedly installed on the surface of the rotating shaft, and a discharge pipe is provided on the lower side wall of the mixing chamber (1), characterized in that: The mixing box (1) is equipped with a cleaning structure (3) for scraping its inner wall; The cleaning structure (3) includes a connecting cylinder (31) fixedly installed on both sides of the rotating shaft. A fixed cylinder (32) is provided on the side wall of the connecting cylinder (31). One end of a compression spring (33) is fixedly installed on the inner wall of the fixed cylinder (32). A sliding plate (34) is fixedly installed on the other end of the compression spring (33). One end of a moving rod (35) is fixedly installed on the side wall of the sliding plate (34). A scraper (36) is fixedly installed on the other end of the moving rod (35). A guide groove (37) is opened on the surface of the scraper (36). Multiple sets of unblocking holes (38) are opened on the surface of the scraper (36).

2. The raw material mixing device for graphite carbon brush production according to claim 1, characterized in that: The cleaning structure (3) also includes three sets of inclined guide plates (39) fixedly installed on the side wall of the scraper (36). The inclined guide plates (39) are fixedly installed with elastic baffles (310) on both sides. The inclined guide plates (39) have three sets of ventilation holes (311) on their surface.

3. The raw material mixing device for graphite carbon brush production according to claim 2, characterized in that: A triangular block (6) is fixedly installed at the lower end of the inclined guide plate (39), and several sets of tooth grooves (7) are opened on the surface of the triangular block (6).

4. The raw material mixing device for graphite carbon brush production according to claim 1, characterized in that: The guide groove (37) is spiral-shaped and has multiple sets, and the multiple sets of the guide groove (37) are arranged in an array on the surface of the scraper (36).

5. The raw material mixing device for producing graphite carbon brushes according to claim 1, characterized in that: A limit ring can be detachably installed on the surface of the fixed cylinder (32), and the sliding plate (34) is slidably connected to the inner wall of the fixed cylinder (32).

6. The raw material mixing device for producing graphite carbon brushes according to claim 2, characterized in that: The positions of the unblocking hole (38) and the inclined guide plate (39) are staggered.

7. The raw material mixing device for producing graphite carbon brushes according to claim 1, characterized in that: The surface of the connecting cylinder (31) is provided with a positioning structure (4). The positioning structure (4) includes a clamping rod (41) fixedly installed on the side wall of the fixed cylinder (32). The surface of the clamping rod (41) is provided with a clamping hole (42). The surface of the fixed cylinder (32) is provided with a limiting hole. A T-shaped rod (43) is inserted into the clamping hole (42) and the limiting hole.

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