A mixing device for brake pad production

Abstract

The application relates to the technical field of material mixing equipment, and provides a mixing device for brake pad production, which comprises a mixing tank, a rotating frame and a stirring unit, the stirring unit is arranged on the rotating frame; wherein the stirring unit comprises a transmission shaft, a transmission box, a stirring arm and a wall scraping piece; the mixing tank has a mixing cavity for mixing materials; the rotating frame is rotationally arranged in the mixing cavity; the transmission shaft is rotationally arranged in the mixing cavity, the transmission box is rotationally sleeved at the outer periphery of the transmission shaft, the stirring arm is arranged at the outer periphery of the transmission box, and the wall scraping piece is arranged at the outer extension end of the stirring arm; the transmission box is fixedly connected with the rotating frame, the wall scraping piece abuts against the inner wall of the mixing cavity, and the wall scraping piece is used for scraping off the materials adhered to the inner wall of the mixing cavity. Through the above technical scheme, the problem that, when materials are mixed in a tank-shaped or cylinder-shaped container in the related art, a mixing dead angle is prone to occurring, and the materials are not uniformly mixed is solved. The uniformity of material mixing is improved.

Description

Technical Field

[0001] The embodiments of the present invention relate to the field of material mixing equipment technology, specifically to a mixing device for brake pad production. Background Technology

[0002] Brake pads, also known as brake discs, are commonly used in automobiles and are generally referred to as automotive brake pads. They are friction materials fixed to the brake drum or brake disc that rotates with the wheel. Brake pads typically consist of a steel plate, an adhesive heat-insulating layer, and friction blocks. The heat-insulating layer is made of a non-heat-conducting material for heat insulation. The friction blocks, composed of friction materials and adhesive, are pressed against the brake disc or brake drum during braking to generate friction, thereby achieving the purpose of vehicle deceleration and braking.

[0003] Friction blocks are a key component of braking systems, and their quality affects the overall performance of brake pads. The friction materials in friction blocks consist of various materials, such as reinforcing fibers (glass fiber, aramid fiber, carbon fiber, etc.), modifiers (metal oxides, sulfides, graphite, etc.), fillers (barite, diatomaceous earth, etc.), and other additives (antioxidants, lubricants, etc.). These materials are then bonded together using an adhesive. The final friction block is then formed using a molding die. During the material mixing process, mixing often takes place in can or cylindrical containers. When multiple materials are added to the mixing container, some materials adhere to the inner wall or corners, creating mixing dead zones and resulting in uneven mixing, poor material consistency, and negatively impacting the quality of the final product. Therefore, improvements and optimizations to the existing technology are needed to reduce these problems. Summary of the Invention

[0004] To overcome the above-mentioned defects, embodiments of the present invention provide a mixing device for brake pad production, which solves the problem that when materials are mixed in cans or cylindrical containers, mixing dead zones easily occur, resulting in uneven mixing of materials.

[0005] According to one aspect, at least one embodiment of the present invention provides a mixing apparatus for brake pad production, comprising:

[0006] A mixing tank having a mixing chamber for mixing materials;

[0007] A rotating frame is rotatably positioned within the mixing chamber;

[0008] A stirring unit is disposed on the rotating frame. The stirring unit includes a transmission box disposed on the rotating frame, a stirring arm disposed on the outer periphery of the transmission box, and a wall scraper disposed on the extended end of the stirring arm. The wall scraper abuts against the inner wall of the mixing chamber and is used to scrape off the material adhering to the inner wall of the mixing chamber.

[0009] For example, in a mixing device for brake pad production provided in at least one embodiment of the present invention, the scraper includes:

[0010] The base is slidably disposed at the extension end of the stirring arm along the axial direction of the stirring arm;

[0011] A scraper is disposed on the base near the inner wall of the mixing chamber. In the circumferential direction of the mixing chamber, at least one end of the scraper is provided with a blade for scraping off the material on the inner wall of the mixing chamber.

[0012] For example, in a mixing device for brake pad production provided in at least one embodiment of the present invention, the scraper further includes:

[0013] The first elastic element has one end acting on the base and the other end acting on the stirring arm. The first elastic element can elastically push the base to drive the blade of the scraper to abut against the inner wall of the mixing chamber.

[0014] A sliding sleeve is provided on the base, the sliding sleeve is sleeved on the outer end of the stirring arm and slides in cooperation with the stirring arm, and the first elastic element is located inside the sliding sleeve.

[0015] For example, in a mixing device for brake pad production provided in at least one embodiment of the present invention, the base has a cavity with an opening facing the scraper, the scraper sealing the opening side of the cavity, and a through hole adjacent to the scraper is provided on the side wall of the base; the mixing device for brake pad production further includes a self-cleaning unit, the self-cleaning unit comprising:

[0016] The self-cleaning knife is slidably disposed on the scraper and located in the seat cavity. The self-cleaning knife has a self-cleaning blade. The self-cleaning knife can slide to the outside of the through hole to scrape off the material attached to the blade of the scraper. After sliding, the self-cleaning knife can pass through the through hole and drive the self-cleaning blade to move back and forth in and out of the seat cavity.

[0017] The secondary blade is slidably connected to the side wall of the seat cavity. The sliding direction of the secondary blade is parallel to the axial direction of the stirring arm. When the secondary blade is configured to slide, its blade edge can scrape off the material remaining on the self-cleaning blade.

[0018] For example, in a mixing device for brake pad production provided in at least one embodiment of the present invention, the stirring arm has a cavity, and the mixing device for brake pad production further includes a self-cleaning transmission unit, the self-cleaning transmission unit comprising:

[0019] A drive shaft is rotatably disposed within the mixing chamber, and the drive shaft passes through the transmission box from top to bottom and is rotatably engaged with the transmission box.

[0020] A self-cleaning spindle is rotatably disposed within the seat cavity, with one end of the self-cleaning spindle extending through the bottom wall of the seat cavity into the tube cavity;

[0021] The self-cleaning sub-shaft is slidably sleeved on the self-cleaning main shaft and located inside the cavity. The self-cleaning sub-shaft is connected to the drive shaft through a bevel gear pair. The self-cleaning sub-shaft can drive the self-cleaning main shaft to rotate under the action of the drive shaft.

[0022] The transmission main disc is sleeved on the self-cleaning main shaft and located in the seat cavity. An annular sliding groove is provided on one side wall of the transmission main disc.

[0023] The first connecting rod has one end fixedly connected to the self-cleaning blade and the other end provided with a first sliding post. The first sliding post is slidably disposed in the sliding groove. The first connecting rod can drive the self-cleaning blade to slide relative to the scraper under the action of the transmission main plate.

[0024] For example, in a mixing device for brake pad production provided in at least one embodiment of the present invention, the end of the auxiliary blade away from the self-cleaning blade has a first inclined guide surface, and the self-cleaning transmission unit further includes:

[0025] The transmission sub-disc is eccentrically sleeved on the outer periphery of the self-cleaning main shaft and located on the side of the transmission main disc away from the scraper. At least one side wall of the transmission sub-disc has a guide groove.

[0026] A wedge block is slidably disposed within the seat cavity and parallel to the sliding direction of the self-cleaning knife. The wedge block has a second inclined guide surface that slides in cooperation with the first inclined guide surface.

[0027] The second connecting rod has a second sliding post at one end that is slidably disposed in the guide groove, and the other end that is slidably engaged with the wedge block;

[0028] The second elastic element has one end acting on the wedge and the other end acting on the second connecting rod. The second elastic element is used to elastically push the wedge away from the second connecting rod.

[0029] For example, in a mixing device for brake pad production provided in at least one embodiment of the present invention, a transmission disk is rotatably provided on the top wall of the mixing tank, the rotating frame is connected below the transmission disk and can rotate under the drive of the transmission disk, and the transmission shaft passes through the transmission disk and rotates in cooperation with the transmission disk.

[0030] For example, in at least one embodiment of the present invention, a mixing apparatus for brake pad production further includes:

[0031] Several prisms are spaced apart on the outer periphery of the stirring arm and the sliding sleeve. The prisms extend radially along the stirring arm, and the axial direction of the prisms is perpendicular to the axial direction of the stirring arm. The cross-section of the prisms is rhomboid, and the major axis of the cross-section of the prisms is set at an angle to the axial direction of the stirring arm.

[0032] For example, in a mixing device for brake pad production provided in at least one embodiment of the present invention, the number of stirring arms and the number of wall scrapers are both several and are arranged in a one-to-one correspondence, the number of transmission boxes and the number of rotating frames are both several and are arranged in a one-to-one correspondence, the number of stirring arms is distributed at intervals along the axial direction of the transmission shaft, and the outer periphery of each transmission box is provided with several stirring arms.

[0033] For example, in a mixing device for brake pad production provided in at least one embodiment of the present invention, the stirring arms on two adjacent transmission boxes along the axial direction of the transmission shaft are staggered.

[0034] The beneficial effects of the embodiments of the present invention are as follows:

[0035] In this invention, the material attached to the inner wall of the mixing chamber is scraped off by a blade that abuts against the inner wall. The scraped material is then mixed with other materials in the mixing chamber by the scraping device, which improves the uniformity of material mixing and avoids the formation of dead zones in the mixing chamber, thus preventing uneven mixing of materials in certain areas. Attached Figure Description

[0036] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of the present invention and these drawings without any creative effort.

[0037] Figure 1 This is a schematic diagram of the overall (internal) structure of a mixing tank in one embodiment of the present invention;

[0038] Figure 2 for Figure 1 A schematic diagram of the structure of the scraper at the wall of the mixing chamber in the embodiment;

[0039] Figure 3 for Figure 2 A magnified view of a portion at point A in the embodiment;

[0040] Figure 4 for Figure 1 A schematic diagram of the structure of the bottom of the mixing tank and the interior of the base in the embodiment;

[0041] Figure 5 for Figure 4 A magnified view of a portion of point B in the embodiment;

[0042] Figure 6 for Figure 1 A top view of the interior of the mixing tank in the embodiment;

[0043] Figure 7 for Figure 6 A magnified view of a portion of point C in the embodiment;

[0044] Figure 8 for Figure 1 A schematic diagram of the structure of the sliding sleeve and stirring arm joint and the inside of the transmission box in the embodiment;

[0045] Figure 9 for Figure 8 A magnified view of a portion at point D in the embodiment;

[0046] Figure 10 for Figure 8 A magnified view of a portion at point E in the embodiment;

[0047] Figure 11 for Figure 1 The overall structural diagram in the embodiment is shown.

[0048] Figure 12 for Figure 1 The embodiment is a schematic diagram of the overall (internal) structure of the mixing tank from the second angle.

[0049] In the diagram: 10. Mixing tank; 11. Mixing chamber; 12. Rotating frame; 13. Transmission disc; 20. Stirring unit; 21. Transmission box; 22. Stirring arm; 221. Tube; 23. Scraper; 231. Base; 2311. Seat cavity; 232. Scraper; 2321. Blade; 233. First elastic element; 234. Sliding sleeve; 235. Through hole; 30. Self-cleaning unit; 31. Self-cleaning blade; 311. Self-cleaning blade; 3 2. Secondary blade; 321. First inclined guide surface; 40. Self-cleaning transmission unit; 41. Self-cleaning main shaft; 42. Self-cleaning secondary shaft; 43. Bevel gear pair; 44. Transmission main disc; 441. Slide groove; 45. First connecting rod; 451. First sliding column; 46. Transmission secondary disc; 461. Guide groove; 47. Wedge block; 471. Second inclined guide surface; 48. Second connecting rod; 481. Second sliding column; 49. Transmission shaft; 50. Prism; 51. Edge. Detailed Implementation

[0050] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it.

[0051] To keep the drawings concise, each drawing only schematically shows the parts relevant to the disclosure; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of components with the same structure or function is schematically shown, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0052] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0053] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0054] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0055] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0056] See Figures 1-12 As shown, it illustrates a mixing device for brake pad production according to an embodiment of the present invention, which is used to mix various raw materials for brake pads. In addition, it can also be used to mix other powders, slurries and other products or materials.

[0057] See Figure 1 and Figure 12As shown, the mixing tank 10 has a mixing chamber 11 and a stirring unit 20. A drive shaft 49 is rotatably disposed within the mixing chamber 11, and the axis of the drive shaft 49 coincides with the axis of the mixing tank 10. (See also...) Figures 10-12 As shown, the drive shaft 49 runs through the entire mixing chamber 11 from top to bottom. The upper end of the drive shaft 49 passes through the top wall of the mixing tank 10 and is connected to the output shaft of the motor installed on the top wall of the mixing tank 10. The top wall of the mixing tank 10 is provided with a material inlet, which also serves as an observation window to facilitate the observation of the work progress in the mixing chamber 11 by the staff. A discharge port (not shown in the figure) is provided at the bottom edge of the bottom wall or side wall of the mixing tank 10 to discharge the uniformly mixed material.

[0058] See Figure 1 and Figure 2 As shown, a transmission box 21, a stirring arm 22, a sliding sleeve 234, a base 231, and a scraper 232 are sequentially arranged from the outer periphery of the transmission shaft 49 to the inner wall of the mixing chamber 11. The scraper 232 abuts against the inner wall of the mixing chamber 11, and the blade 2321 of the scraper 232 slides against the inner wall of the mixing chamber 11. The length extension direction of the blade 2321 is parallel to or at an angle to the axial direction of the mixing tank 10. The base 231 is fixedly connected to the scraper 232. The sliding sleeve 234 is located on the side of the base 231 away from the scraper 232. The transmission shaft 49 is connected to the stirring arm 22 through the transmission box 21, and the stirring arm 22 is movably engaged with the sliding sleeve 234. The transmission box 21 and the transmission shaft 49 are in a rotational engagement.

[0059] In use, the rotating frame 12 rotates with the help of an external driver (using an electric motor in the prior art). When the rotating frame 12 rotates, it drives the transmission box 21 to rotate in the same direction. The rotating transmission box 21 drives the stirring arm 22, the sliding sleeve 234, the base 231 and the scraper 232 to rotate in the same direction in sequence. The material attached to the blade 2321, which abuts against the inner wall of the mixing chamber 11, is scraped off. The scraped material is mixed with other materials in the mixing chamber 11 under the action of the wall scraper 23, which improves the uniformity of material mixing and avoids the formation of stirring dead corners in the mixing chamber 11, resulting in uneven mixing of local materials.

[0060] See Figures 1-5 As shown, several prisms 50 are arranged on the outer peripheral walls of the stirring arm 22 and the sliding sleeve 234. When the stirring arm 22 rotates in the mixing chamber 11, the blades 51 on the prisms 50 cut and split the locally clumped material in the mixing chamber 11, breaking up the existing material state and improving the uniformity of mixing.

[0061] See Figure 8 and Figure 9As shown, a first elastic element 233 is provided between the stirring arm 22 and the base 231. The first elastic element 233 is a spring that can be stretched and compressed to generate deformation in the prior art. During operation, the mixing tank 10 is a frequently used piece of equipment. When the mixing tank 10 is bumped and its shell is deformed, the stirring arm 22, base 231 and scraper 232, which are of the original size and cooperate with each other, will not be able to meet the production needs. If the shell of the mixing tank 10 is deformed by bulging outward, the scraper 232 may not be able to fit against the inner wall of the mixing chamber 11, resulting in a dead corner in the mixing. If the shell of the mixing tank 10 is deformed by inward, the scraper 232 will be unable to fit against the inner wall of the mixing chamber 11, resulting in a dead corner in the mixing. Hard compression occurs between the scraper 232 and the inner wall of the mixing chamber 11, causing damage to the scraper 232 and the stirring arm 22. By adding a sliding sleeve 234 and a first elastic element 233, the connection between the stirring arm 22 and the base 231 is adjusted to a movable connection. Through the buffering of the first elastic element 233, the scraper 232 can always be in contact with the inner wall of the mixing chamber 11, adapting to the deformation of the mixing tank 10 shell. At the same time, with the help of the first elastic element 233, the stirring arm 22, the base 231 and the scraper 232 can be used for mixing tanks of different specifications, expanding the applicability of the stirring arm 22, the base 231 and the scraper 232.

[0062] See Figures 4-7 As shown, the base 231 has a seat cavity 2311, in which a self-cleaning unit 30 and a self-cleaning transmission unit 40 are added. The self-cleaning unit 30 includes a self-cleaning blade 31 and a secondary blade 32. The self-cleaning transmission unit 40 includes a self-cleaning main shaft 41, a self-cleaning secondary shaft 42, a bevel gear pair 43, a transmission main disc 44, a first connecting rod 45, a transmission secondary disc 46, a wedge block 47, and a second connecting rod 48. The number of self-cleaning blades 31, secondary blades 32, the first connecting rod 45, the wedge block 47, and the second connecting rod 48 are all two, and they are arranged one-to-one on both sides of the self-cleaning main shaft 41. The self-cleaning secondary shaft 42 passes through the side wall of the transmission box 21 and is connected to the transmission shaft 49 by means of the bevel gear pair 43 located in the inner cavity of the transmission box 21. The self-cleaning secondary shaft 42 is located in the cavity 221 and is coaxially arranged with the stirring arm 22.

[0063] See Figure 7As shown, the self-cleaning blade 31 has a self-cleaning edge 311 with a triangular cross-section. The tip of the secondary blade 32 has a triangular cross-section that is complementary to the cross-section of the self-cleaning edge 311, forming a right angle. Two through holes 235 are formed between the two side walls of the base 231 and the scraper 232. When the drive shaft 49 rotates, it drives the self-cleaning secondary shaft 42 to rotate through the bevel gear pair 43, changing the vertical rotation drive of the drive shaft 49 into a horizontal rotation. A guide bar is provided on the outer circumference of the self-cleaning main shaft 41. The self-cleaning secondary shaft 42 is tubular, and a guide groove is provided on the inner circumference side wall of the self-cleaning secondary shaft 42. The guide bar and the guide groove slide together. The self-cleaning secondary shaft 42 drives the self-cleaning main shaft 41 to rotate synchronously through the guide bar and the guide groove. At the same time, it can slide along the axial direction of the self-cleaning main shaft 41, thereby adjusting the overall external length of the self-cleaning main shaft 41 and the self-cleaning secondary shaft 42 to adapt to different specifications of mixing tanks 10.

[0064] See Figure 5 and Figure 7 As shown, after the self-cleaning main shaft 41 rotates, it will drive the transmission main disk 44 and the transmission secondary disk 46 to rotate simultaneously. The sliding groove 441 on the transmission main disk 44 is an eccentric ring. When the transmission main disk 44 rotates, it will drive the two first sliding pillars 451 and the corresponding self-cleaning blades 31 to slide in the same direction in the horizontal direction through the sliding groove 441, so that the two self-cleaning blades 31 pass through the through hole 235. Looking along the rotation direction of the transmission shaft 49, the self-cleaning blade 31 on the front side is used to clean the blade 2321 of the scraper 232. Although the self-cleaning blade 31 on the rear side moves synchronously, it does not participate in the cleaning operation. When the transmission shaft 49 rotates in the opposite direction, the second blade 2321 of the scraper 232 starts to work. The self-cleaning blade 31 on the rear side in the original direction starts to clean the scraper 232. The self-cleaning blade 31 on the front side does not participate in the cleaning operation. Through the setting of two sets of self-cleaning blades 31, the self-cleaning unit 30 and the self-cleaning transmission unit 40 can adapt to the forward and reverse rotation of the transmission shaft 49.

[0065] by Figure 6 If we define the direction of counterclockwise rotation as positive, then at this time... Figure 7The self-cleaning blade 31 on the left slides to the left, sliding outward from the seat cavity 2311 and passing through the through hole 235. The tip of the self-cleaning blade 31 gradually approaches the blade edge 2321 of the scraper 232. When the scraper 232 is working, as the stirring arm 22 rotates in the horizontal plane, the material scraped off from the inner wall of the mixing chamber 11 by the blade edge 2321 will agglomerate at the blade edge 2321, reducing the working effect of the blade edge 2321. At this time, the self-cleaning blade 31 gradually approaches the blade edge 2321. When the first connecting rod 45 slides to the blade edge 2321 closest to the left, the farthest point of the sliding groove 441 on the transmission main disc 44 (the distance of the sliding groove 441 from the transmission main disc 44) is also the farthest point. The point at the farthest position of the axis of disk 44 is located closest to the left through hole 235; at this time, the tip of the self-cleaning knife 31 just slides to the blade 2321 and scrapes the material at the blade 2321 off the blade 2321, separating it from the blade 2321, so as to facilitate mixing with the material in the mixing chamber 11; improving the working effect of the blade 2321; as the transmission main disk 44 rotates, the farthest point of the slide groove 441 gradually moves away from the position of the left through hole 235, and drives the first slide column 451, the first connecting rod 45, and the self-cleaning knife 31 (on the left) to slide to the right together through the guide groove 461, and the self-cleaning knife 31 gradually slides into the seat cavity 2311.

[0066] When the main transmission disc 44 rotates, the auxiliary transmission disc 46 rotates synchronously. The guide groove 461 on the auxiliary transmission disc 46 is a closed annular shape and is eccentrically offset from the axis of the self-cleaning spindle 41. Taking the left self-cleaning blade 31 as an example, see... Figure 6As shown, when the farthest point of the slide groove 441 is located closest to the left through hole 235, the nearest point of the guide groove 461 (the point on the guide groove 461 closest to the axis of the transmission main disc 44) is located furthest from the left through hole 235. With the aid of a second elastic element (not shown in the figure) positioned between the wedge block 47 and the second connecting rod 48, the second elastic element is a spring (a type of existing technology). At this time, the second elastic element is in a compressed state, pushing against the wedge block 47 and squeezing the secondary blade 32. Through the mutual sliding cooperation of the first inclined guide surface 321 and the second inclined guide surface 471, the secondary blade 32 is pushed closer to the self-cleaning blade 31, causing the blade tip of the secondary blade 32 to abut against the self-cleaning blade 31. When the self-cleaning blade 31 slides into the seat cavity 2... When sliding in the direction of 311, the transmission sub-disc 46 rotates, and at the same time, it squeezes the second sliding column 481 through the guide groove 461, pushing the second sliding column 481 and the second connecting rod 48 to slide in the direction of compressing the second elastic element. The second elastic element deforms and accumulates elastic force. The accumulated elastic force is transmitted to the sub-blade 32 through the wedge block 47, the second inclined guide surface 471 and the first inclined guide surface 321 in sequence, so that the sub-blade 32 and the self-cleaning blade 31 are kept in a close fit. As the self-cleaning blade 31 gradually slides into the seat cavity 2311, when the tip of the self-cleaning blade 31 just slides into the seat cavity 2311, the tip of the sub-blade 32 will gradually scrape and clean along the tip of the self-cleaning blade 31, avoiding the material from adhering to the tip of the self-cleaning blade 31 and reducing the cleaning effect of the self-cleaning blade 31. While cleaning the tip of the self-cleaning blade 31, the secondary blade 32 also traps the scraped material at and outside the through hole 235, preventing material from entering the seat cavity 2311 and affecting the movement of the parts. When the self-cleaning blade 31 slides outward from the seat cavity 2311, it lifts the secondary blade 32 and allows it to clean the scraper 232 through the through hole 235. This process is repeated, cleaning the inner wall of the mixing chamber 11, eliminating dead zones in the mixing process, improving the mixing effect, and also enabling the scraper 232 to self-clean, extending the service life of the parts and improving the overall working efficiency.

[0067] See Figures 7-12 It can be seen that a transmission disk 13 is rotatably mounted on the top wall of the mixing tank 10. The rotating frame 12 is connected to the bottom end of the transmission disk 13. The transmission shaft 49 passes through the middle position of the transmission disk 13 and rotates with the transmission disk 13. The portion of the transmission disk 13 that extends beyond the top wall of the mixing tank 10 has external teeth (not shown in the figure). A driver is mounted on the top wall of the mixing tank 10. The driver is an electrically driven motor. The output end of the driver is equipped with a transmission gear. The teeth of the transmission gear (not shown in the figure) mesh with the external teeth.

[0068] The drive unit is started, and the power output from the drive unit sequentially drives the transmission gear, transmission disc 13, rotating frame 12, and transmission box 21, thereby causing the transmission box 21 to rotate horizontally around the transmission shaft 49, achieving the agitation and mixing of materials. This allows the wall scraper 23 and the stirring arm 22 to work simultaneously without interfering with each other, ensuring the stable progress of mixing and cleaning operations.

[0069] See Figure 2 and Figure 4 It can be seen that several sets of stirring arms 22 are arranged along the axial direction of the drive shaft 49. The mixing chamber 11 is fully covered by multiple sets of stirring arms 22, reducing the dead angle of stirring. The staggered distribution of two adjacent sets of stirring arms 22 improves the stability of the stirring components when they rotate. At the same time, when two adjacent sets of stirring arms 22 rotate, the materials between them move up and down, improving the mixing effect.

[0070] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention 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 solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A mixing device for brake pad production, characterized in that, include: The mixing tank (10) has a mixing chamber (11) for mixing materials. The rotating frame (12) is rotatably disposed within the mixing chamber (11); A stirring unit (20) is disposed on the rotating frame (12). The stirring unit (20) includes a transmission box (21) disposed on the rotating frame (12), a stirring arm (22) disposed on the outer periphery of the transmission box (21), and a wall scraper (23) disposed on the extended end of the stirring arm (22). The wall scraper (23) abuts against the inner wall of the mixing chamber (11). The wall scraper (23) is used to scrape off the material adhering to the inner wall of the mixing chamber (11). The scraper (23) includes: The base (231) is slidably disposed on the extension end of the stirring arm (22) along the axial direction of the stirring arm (22); A scraper (232) is provided on the base (231) on one side near the inner wall of the mixing chamber (11). In the circumferential direction of the mixing chamber (11), at least one end of the scraper (232) is provided with a blade (2321) for scraping off the material on the inner wall of the mixing chamber (11). The base (231) has a cavity (2311) with an opening facing the scraper (232), the scraper (232) covering the opening side of the cavity (2311), and a through hole (235) adjacent to the scraper (232) is provided on the side wall of the base (231); the mixing device for brake pad production also includes a self-cleaning unit (30), the self-cleaning unit (30) including: The self-cleaning knife (31) is slidably disposed on the scraper (232) and located in the seat cavity (2311). The self-cleaning knife (31) has a self-cleaning blade (311). The self-cleaning knife (31) can slide to the outside of the through hole (235) to scrape off the material attached to the blade (2321) of the scraper (232). After sliding, the self-cleaning knife (31) can pass through the through hole (235) and drive the self-cleaning blade (311) to move back and forth inside and outside the seat cavity (2311). The secondary blade (32) is slidably connected to the side wall of the seat cavity (2311). The sliding direction of the secondary blade (32) is parallel to the axial direction of the stirring arm (22). When the secondary blade (32) is configured to slide, the blade of the secondary blade (32) can scrape off the material remaining on the self-cleaning blade (311).

2. The mixing device for brake pad production according to claim 1, characterized in that, The scraper (23) also includes: The first elastic element (233) acts on the base (231) at one end and on the stirring arm (22) at the other end. The first elastic element (233) can elastically push the base (231) to drive the blade (2321) of the scraper (232) to abut against the inner wall of the mixing chamber (11). A sliding sleeve (234) is provided on the base (231). The sliding sleeve (234) is sleeved on the outer end of the stirring arm (22) and slides in cooperation with the stirring arm (22). The first elastic element (233) is located inside the sliding sleeve (234).

3. The mixing device for brake pad production according to claim 2, characterized in that, The stirring arm (22) has a cavity (221), and the mixing device for brake pad production further includes a self-cleaning transmission unit (40), which includes: The drive shaft (49) is rotatably disposed in the mixing chamber (11), and the drive shaft (49) passes through the transmission box (21) from top to bottom and rotates with the transmission box (21); The self-cleaning spindle (41) is rotatably disposed in the seat cavity (2311), and one end of the self-cleaning spindle (41) extends through the bottom wall of the seat cavity (2311) into the tube cavity (221); The self-cleaning sub-shaft (42) is slidably sleeved on the self-cleaning main shaft (41) and located in the cavity (221). The self-cleaning sub-shaft (42) is connected to the transmission shaft (49) through a bevel gear pair (43). The self-cleaning sub-shaft (42) can drive the self-cleaning main shaft (41) to rotate under the action of the transmission shaft (49). The transmission main disc (44) is sleeved on the self-cleaning main shaft (41) and located in the seat cavity (2311). An annular groove (441) is provided on one side wall of the transmission main disc (44). The first connecting rod (45) is fixedly connected to the self-cleaning blade (31) at one end and has a first sliding post (451) at the other end. The first sliding post (451) is slidably disposed in the sliding groove (441). The first connecting rod (45) can drive the self-cleaning blade (31) to slide relative to the scraper (232) under the action of the transmission main plate (44).

4. The mixing device for brake pad production according to claim 3, characterized in that, The secondary blade (32) has a first inclined guide surface (321) at the end away from the self-cleaning blade (31), and the self-cleaning transmission unit (40) further includes: The transmission sub-disc (46) is eccentrically sleeved on the outer periphery of the self-cleaning main shaft (41) and located on the side of the transmission main disc (44) away from the scraper (232). At least one side wall of the transmission sub-disc (46) is provided with a guide groove (461). The wedge (47) is slidably disposed in the seat cavity (2311) and parallel to the sliding direction of the self-cleaning knife (31). The wedge (47) has a second inclined guide surface (471) that slides in cooperation with the first inclined guide surface (321). The second connecting rod (48) has a second sliding column (481) at one end that is slidably disposed in the guide groove (461), and the other end is slidably engaged with the wedge block (47); The second elastic element has one end acting on the wedge (47) and the other end acting on the second connecting rod (48). The second elastic element is used to elastically push the wedge (47) away from the second connecting rod (48).

5. A mixing device for brake pad production according to claim 3, characterized in that, The top wall of the mixing tank (10) is rotatably provided with a transmission disk (13). The rotating frame (12) is connected below the transmission disk (13) and can rotate under the drive of the transmission disk (13). The transmission shaft (49) passes through the transmission disk (13) and rotates in cooperation with the transmission disk (13).

6. A mixing device for brake pad production according to claim 5, characterized in that, Also includes: A number of prisms (50) are distributed at intervals around the outer periphery of the stirring arm (22) and the sliding sleeve (234). The prisms (50) extend radially along the stirring arm (22), and the axial direction of the prisms (50) is perpendicular to the axial direction of the stirring arm (22). The cross-section of the prisms (50) is rhomboid, and the major axis of the cross-section of the prisms (50) is set at an angle to the axial direction of the stirring arm (22).

7. A mixing device for brake pad production according to claim 5, characterized in that, The number of stirring arms (22) and wall scrapers (23) are both several and are arranged in a one-to-one correspondence. The number of transmission boxes (21) and rotating frames (12) are both several and are arranged in a one-to-one correspondence. Several stirring arms (22) are distributed at intervals along the axial direction of the transmission shaft (49). Several stirring arms (22) are provided on the outer periphery of each transmission box (21).

8. A mixing device for brake pad production according to claim 7, characterized in that, The stirring arms (22) on two adjacent transmission boxes (21) along the axial direction of the transmission shaft (49) are staggered.

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