Stirring paddle and kneading machine

Abstract

The utility model provides a stirring paddle and a kneading machine. And the stirring paddle is accommodated in a kneading cylinder of the kneading machine. The stirring paddle comprises a plurality of stirring blades, and each stirring blade comprises a first paddle part, a second paddle part and a third paddle part. And the first paddle part extends towards the peripheral side wall of the kneading cylinder relative to the central axis of the kneading cylinder. The second paddle part is connected to the end part, far away from the central axis of the kneading barrel, of the first paddle part, is arranged close to the peripheral side wall of the kneading barrel, and is used for pushing materials in the kneading barrel in the axial direction and the peripheral direction of the kneading barrel. The third paddle part is connected to the end part, far away from the first paddle part, of the second paddle part and extends towards the central axis of the kneading machine. When the second paddle part scrapes materials on the peripheral side wall, the second paddle part kneads the materials in the axial direction of the kneading barrel, so that the kneading efficiency of the materials is improved, the resistance of the second paddle part in the peripheral direction of the kneading barrel when the second paddle part scrapes the materials is reduced, and overload of a driver of the stirring paddle is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of kneading equipment, in particular to a stirring paddle and a kneader. Background Art

[0002] When scraping materials, the stirring paddle in the existing kneader cannot knead the materials in the axial direction of the kneading cylinder when scraping the materials on the circumferential side wall of the kneading cylinder, and the kneading efficiency of the stirring paddle for the materials is low. Summary of the Utility Model

[0003] The utility model provides a stirring paddle and a kneader to solve the problem of low kneading efficiency of the stirring paddle for materials.

[0004] In a first aspect, the utility model provides a stirring paddle, which is accommodated in a kneading cylinder of a kneader. The stirring paddle includes a plurality of stirring paddle blades, and the plurality of stirring paddle blades are arranged along the circumferential direction of the kneading cylinder and are used for rotating around the central axis of the kneading cylinder. Each stirring paddle blade includes a first paddle part, a second paddle part and a third paddle part. The first paddle part extends towards the circumferential side wall of the kneading cylinder relative to the central axis of the kneading cylinder. The second paddle part is connected to the end of the first paddle part far from the central axis of the kneading cylinder, the second paddle part is arranged close to the circumferential side wall of the kneading cylinder, and the second paddle part is used for pushing the materials in the kneading cylinder in the axial direction and the circumferential direction of the kneading cylinder. The third paddle part is connected to the end of the second paddle part far from the first paddle part and extends towards the central axis of the kneader.

[0005] In the utility model, based on the fact that the second paddle part is arranged close to the circumferential side wall of the kneading cylinder, and the second paddle part is used for pushing the materials in the kneading cylinder in the axial direction and the circumferential direction of the kneading cylinder, so when the second paddle part scrapes the materials on the circumferential side wall of the kneading cylinder, the second paddle part can knead the materials in the axial direction of the kneading cylinder, thereby improving the kneading efficiency of the materials, and can also reduce the resistance in the circumferential direction of the kneading cylinder when the second paddle part scrapes the materials, reduce the rotation resistance of the stirring paddle, and thus avoid the problem of overload of the driver of the stirring paddle.

[0006] In some embodiments, in a plane perpendicular to the axial direction of the kneading cylinder, the positive projections of the opposite ends of the second paddle part along the circumferential direction of the kneading cylinder are arranged in a staggered manner.

[0007] In some embodiments, the second paddle part extends in a spiral shape.

[0008] In some embodiments, in a plane perpendicular to the central axis of the kneading cylinder, the positive projection of the second paddle part is an arc segment with the central axis of the kneading cylinder as the center.

[0009] In some embodiments, the angular range of the central angle corresponding to the orthographic projection of the second paddle part is 30°-120°.

[0010] In some embodiments, the stirring paddle further includes a connecting member, and at least a part of the third paddle parts of the plurality of stirring paddle blades are connected to the connecting member at one end away from the second paddle part.

[0011] In some embodiments, the third paddle part includes a first sub-paddle part and a second sub-paddle part. One end of the first sub-paddle part is connected to the second paddle part, the other end of the first sub-paddle part is connected to the second sub-paddle part, and a bending angle part is formed at the connection of the first sub-paddle part and the second sub-paddle part.

[0012] In some embodiments, along the axial direction of the kneading cylinder, the distance between one end of the first paddle part away from the second paddle part and the third paddle part is greater than the distance between one end of the first paddle part close to the second paddle part and the third paddle part.

[0013] In some embodiments, along the radial direction of the kneading cylinder, the width of the second paddle part in the circumferential direction of the kneading cylinder decreases from the side away from the central axis of the kneading cylinder to the side close to the kneading cylinder.

[0014] In some embodiments, a protrusion is provided on one side of the first paddle part and / or the third paddle part close to the top of the kneading cylinder. Along the axial direction of the kneading cylinder, the width of the protrusion in the circumferential direction of the kneading cylinder decreases from the side away from the top of the kneading cylinder to the side close to the top of the kneading cylinder.

[0015] In some embodiments, the stirring paddle further includes a first scraping member. The first scraping member is provided on the side of the second paddle part away from the central axis of the kneading cylinder. The first scraping member includes a first surface and a second surface oppositely arranged in the radial direction of the kneading cylinder, and a first scraping surface connected between the first surface and the second surface. The first surface is located on the side of the second surface close to the second paddle part. The first scraping surface is arranged at an obtuse angle with the first surface, and the first scraping surface is arranged at an acute angle with the second surface.

[0016] In some embodiments, the stirring paddle blades and the first scraping members are respectively provided in plurality. Among at least two of the second paddle parts, at least one first scraping member is provided on each second paddle part, and the first scraping members on different second paddle parts are arranged in a circumferential direction offset manner along the kneading cylinder.

[0017] In some embodiments, the stirring paddle further includes a second scraping member, the second scraping member is disposed on a side of the third paddle portion away from the first paddle portion, the second scraping member includes a third surface and a fourth surface oppositely disposed along the axial direction of the kneading cylinder, and a second scraping surface connected between the third surface and the fourth surface, the third surface is located on a side of the fourth surface close to the third paddle portion, the second scraping surface is disposed at an obtuse angle with the third surface, and the second scraping surface is disposed at an acute angle with the fourth surface.

[0018] In some embodiments, the stirring paddle blades and the second scraping members are respectively provided in plurality, in at least two of the third paddle portions, at least one second scraping member is provided on each of the third paddle portions, and the second scraping members on different third paddle portions are arranged in a circumferential direction of the kneading cylinder in a staggered manner.

[0019] In a second aspect, the present utility model provides a kneading machine, the kneading machine includes a kneading cylinder and the stirring paddle as described in any one of the above, and the stirring paddle is disposed inside the kneading cylinder. Description of the Drawings

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0021] Figure 1 is a schematic structural diagram of the kneading machine provided by the embodiment of the present utility model.

[0022] Figure 2 is a schematic structural diagram of the stirring paddle provided by the embodiment of the present utility model.

[0023] Figure 3 is a bottom view of the stirring paddle provided by the embodiment of the present utility model.

[0024] Figure 4 is a schematic structural diagram of the second paddle portion provided by the present utility model in some embodiments.

[0025] Figure 5 is a cross-sectional view of the second paddle portion provided by the embodiment of the present utility model.

[0026] Figure 6 is Figure 3 an enlarged view of I therein.

[0027] Figure 7 is a cross-sectional view of the third paddle portion and the second scraping member provided by the embodiment of the present utility model.

[0028] Figure 8 This is a schematic structural view of the stirring paddle provided by some embodiments of the present utility model.

[0029] Figure 9 This is a top view of the stirring paddle provided by some embodiments of the present utility model.

[0030] Main reference numerals: Kneader 1; Kneading cylinder 100; Central axis C1; Top wall 101; Peripheral side wall 102; Bottom wall 103; Stirring paddle 200; Stirring paddle blade 20; First paddle part 21; Second paddle part 22; First paddle wall 22a; Second paddle wall 22b; Central angle α; Inclined section 2201; Connecting section 2202; First scraping member 221; First surface 222; Second surface 223; First scraping surface 224; Third paddle part 23; First sub-paddle part 2301; Second sub-paddle part 2302; Folding angle part 2303; Second scraping member 231; Third surface 232; Fourth surface 233; Second scraping surface 234; Connecting member 24; Protrusion 25; Rotating shaft 30; Dispersing paddle 40; Dispersing shaft 41; Dispersing paddle blade 42; Dispersing teeth 43.

[0031] The following specific embodiments will further illustrate the present utility model in conjunction with the above-mentioned drawings. Specific embodiments

[0032] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

[0033] Referring to "embodiments" or "embodiment manners" herein means that the specific features, structures, or characteristics described in conjunction with the embodiments or embodiment manners can be included in at least one embodiment of the present utility model. The phrase appears at various positions in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0034] It should be noted that the terms in the specification and claims of the present utility model and the above-mentioned drawings are only for describing specific embodiments and do not intend to limit the present utility model. The terms "first", "second", etc. in the specification and claims of the present utility model and the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order.

[0035] Please refer to Figure 1 andFigure 2 , Figure 1 is a schematic structural view of the kneader 1 provided by an embodiment of the present utility model; Figure 2 is a schematic structural view of the stirring paddle 200 provided by an embodiment of the present utility model. The kneader 1 includes a kneading cylinder 100 and a stirring paddle 200. The kneading cylinder 100 is used to store materials. The stirring paddle 200 is accommodated in the kneading cylinder 100 of the kneader 1 and is used for stirring and kneading the materials. The kneading cylinder 100 includes a top wall 101, a circumferential side wall 102, and a bottom wall 103. The circumferential side wall 102 is connected between the top wall 101 and the bottom wall 103. The top wall 101, the circumferential side wall 102, and the bottom wall 103 jointly enclose a receiving cavity for receiving the materials and the stirring paddle 200. When the kneader 1 is in a working state, along the axial direction of the kneading cylinder 100, the top wall 101 is located on the side of the bottom wall 103 away from the ground. In the present utility model, for a clearer description, the Z-axis direction is defined as the axial direction of the kneading cylinder 100, the Y-axis direction is defined as the circumferential direction of the kneading cylinder 100, and the X-axis direction is defined as the radial direction of the kneading cylinder 100. The axial direction, the radial direction, and the circumferential direction of the kneading cylinder 100 are perpendicular to each other in pairs. Among them, the circumferential direction of the kneading cylinder 100 is the direction around the central axis C1 of the kneading cylinder 100, the axial direction is parallel to the central axis C1, and the radial direction is perpendicular to the central axis C1.

[0036] The stirring paddle 200 includes a plurality of stirring paddle blades 20. The plurality of stirring paddle blades 20 are arranged along the circumferential direction of the kneading cylinder 100 and are used for rotating around the central axis of the kneading cylinder 100. The number of the stirring paddle blades 20 can be specifically set according to the actual needs of the kneader 1, and no specific limitation is made in the present utility model. Exemplarily, in this embodiment, the stirring paddle blades 20 are set to three. In other embodiments, the number of the stirring paddle blades 20 can also be set to two, four, five, etc.

[0037] Each stirring paddle blade 20 includes a first paddle part 21, a second paddle part 22, and a third paddle part 23. The first paddle part 21 extends towards the circumferential side wall 102 of the kneading cylinder 100 relative to the central axis C1 of the kneading cylinder 100. The second paddle part 22 is connected to the end of the first paddle part 21 away from the central axis C1 of the kneading cylinder 100. The second paddle part 22 is arranged close to the circumferential side wall 102 of the kneading cylinder 100. The second paddle part 22 is used to push the materials in the kneading cylinder 100 along the axial direction and the circumferential direction of the kneading cylinder 100. The third paddle part 23 is connected to the end of the second paddle part 22 away from the first paddle part 21 and extends towards the direction close to the central axis C1 of the kneader 1. Among them, the first paddle part 21 is arranged close to the top wall 101, and the third paddle part 23 is arranged close to the bottom wall 103.

[0038] In this embodiment, the second paddle part 22 is arranged close to the circumferential side wall 102 of the kneading cylinder 100, and the second paddle part 22 is used to push the material in the kneading cylinder 100 along the axial direction and the circumferential direction of the kneading cylinder 100. On the one hand, when the second paddle part 22 scrapes the material on the circumferential side wall 102, the second paddle part 22 can drive the material to move along the axial direction of the kneading cylinder 100, so as to knead the material along the axial direction of the kneading cylinder 100, thereby improving the kneading efficiency of the stirring paddle 200 for the material. On the other hand, the resistance of the material acting on the second paddle part 22 is decomposed into two component forces along the axial direction and the circumferential direction of the kneading cylinder 100, thereby reducing the resistance of the second paddle part 22 in scraping the material along the circumferential direction of the kneading cylinder 100, reducing the rotational resistance of the stirring paddle 200, and reducing the driving load of the driver of the stirring paddle 200, thereby avoiding problems such as bending or breaking of the stirring paddle blades 200 and avoiding problems such as overload of the driver.

[0039] Please refer to Figure 2 and Figure 3 , Figure 3 is the bottom view of the stirring paddle 200 provided by the embodiment of the present invention. On a plane perpendicular to the axial direction of the kneading cylinder 100, the orthographic projections of the two opposite ends of the second paddle part 22 along the circumferential direction of the kneading cylinder 100 are arranged in a staggered manner. The second paddle part 22 is inclined relative to the central axis C1 of the kneading cylinder 100. On the one hand, when the second paddle part 22 scrapes the material adhering to the circumferential side wall 102, the second paddle part 22 can cut the material to reduce the resistance when scraping the material and improve the scraping efficiency. On the other hand, when the second paddle part 22 scrapes the material, the direction of the resistance of the material to the second paddle part 22 is perpendicular to the extension direction of the second paddle part 22. The material resistance can be decomposed into an axial component force along the axial direction of the kneading cylinder 100 and a circumferential component force along the circumferential direction of the kneading cylinder 100. The axial component force is transmitted to the kneading cylinder 100 through the first paddle part 21, and the axial component force does not hinder the rotation of the stirring paddle 200. The circumferential component force forms a resistance that hinders the rotation of the stirring paddle 200 for the stirring paddle 200. Since the adhesion force of the material adhering to the kneading cylinder 100 is a relatively fixed value, the setting method of the second paddle part 22 in this embodiment can reduce the rotational resistance of the stirring paddle 200, thereby avoiding problems such as bending or breaking of the stirring paddle blades 200 and avoiding problems such as overload of the driver.

[0040] Exemplarily, the second paddle part 22 can be arranged to extend in a spiral shape. For example, the second paddle part 22 can be arranged to extend along the direction of a spiral line. The spiral angle of the second paddle part 22 can be specifically set according to actual needs, and no specific limitation is made in the present utility model. In some embodiments, the spiral angle of the second paddle part 22 can be a non-fixed value. For example, the spiral angle of one end of the second paddle part 22 close to the third paddle part 23 is greater than the spiral angle of the end close to the first paddle part 21. Due to the action of gravity, the materials in the kneading cylinder 100 are mainly concentrated on the side close to the bottom wall 103, and compared with the materials close to the top wall 101, the materials close to the bottom wall 103 have a greater resistance to the second paddle part 22. A greater spiral angle at the end of the second paddle part 22 close to the third paddle part 23 can reduce the circumferential component force generated by the materials on the second paddle part 22, thereby reducing the rotational resistance of the stirring paddle 200 and improving the cutting effect of the second paddle part 22 on the materials, and thus improving the scraping efficiency of the second paddle part 22 for scraping the materials.

[0041] Please refer to Figure 4 , in some embodiments, the second paddle part 22 can also be arranged to extend in a stepped shape. For example, the second paddle part 22 can include two inclined sections 2201 and a connecting section 2202. The connecting section 2202 is connected between the two inclined sections 2201. One end of one of the two inclined sections 2201 far from the connecting section 2202 is connected to the first paddle part 21, and the other end of the other inclined section 2201 far from the connecting section 2202 is connected to the third paddle part 23. The two inclined sections 2201 are respectively arranged to extend in a spiral shape. The inclined sections 2201 extend along the circumferential direction of the kneading cylinder 100. Also for example, the second paddle part 22 can further include a plurality of inclined sections 2201 and a plurality of connecting sections 2202, and the plurality of inclined sections 2201 and the plurality of connecting sections 2202 are alternately connected in sequence. Among them, the spiral angles of different inclined sections 2201 can be different. In some embodiments, the second paddle part 22 can also be arranged to extend in a wavy shape.

[0042] Please refer to Figure 1 and Figure 3 , in a plane perpendicular to the central axis C1 of the kneading cylinder 100, the orthographic projection of the second paddle part 22 is an arc segment with the central axis C1 of the kneading cylinder 100 as the center. The distances between each part of the second paddle part 22 along the axial direction of the kneading cylinder 100 and the circumferential side wall 102 are kept consistent, so that the second paddle part 22 can uniformly scrape off the materials adhered to the circumferential side wall 102. In a plane perpendicular to the central axis C1 of the kneading cylinder 100, the angle range of the central angle α corresponding to the orthographic projection of the second paddle part 22 is 30° - 120°. Exemplarily, the central angle α corresponding to the orthographic projection of the second paddle part 22 can be 30°, 40°, 45°, 60°, 75°, 100°, 110°, 120°, etc.

[0043] The stirring paddle 200 further includes a rotating shaft 30. One end of the first paddle part 21 away from the second paddle part 22 is connected to the rotating shaft 30. The rotating shaft 30 is used to be connected to a driver, and the driver is used to drive the rotating shaft 30 to rotate, so as to drive the stirring paddle blades 20 to rotate through the rotating shaft 30.

[0044] The stirring paddle 200 further includes a connecting member 24. One end of the third paddle part 23 in at least some of the plurality of stirring paddle blades 20 away from the second paddle part 22 is connected to the connecting member 24. The plurality of stirring paddle blades 20 are connected together by the connecting member 24, and the connecting member 24 can improve the connection stability and structural strength of the stirring paddle blades 20. Exemplarily, in this embodiment, the third paddle parts 23 of the three stirring paddle blades 20 are respectively connected to the connecting member 24. Along the axial direction of the kneading cylinder 100, the connecting member 24 is located on the extension line of the rotating shaft 30 to improve the stability when the stirring paddle 300 rotates. The connecting member 24 can be configured as an annular structure, and the third paddle part 23 is connected to the circumferential side of the connecting member 24. Wherein, the through hole formed by the connecting member 24 can correspond to the discharge port of the kneading cylinder 100 to facilitate discharging.

[0045] Along the axial direction of the kneading cylinder 100, the distance between one end of the first paddle part 21 away from the second paddle part 22 and the third paddle part 23 is greater than the distance between one end of the first paddle part 21 close to the second paddle part 22 and the third paddle part 23. One end of the first paddle part 21 away from the second paddle part 22 is inclined in a direction away from the third paddle part 23. The top wall 101 is configured as a frustum of a cone. The inclination degree of the first paddle part 21 corresponds to the inclination degree of the top wall 101 to improve the scraping effect of the first paddle part 21 on the material adhering to the top wall 101. Both the top wall 101 and the first paddle part 21 are arranged at an acute angle relative to the central axis C1, so that the material can slide off the top wall 101 and the first paddle part 21 by itself under the action of gravity, reducing the material adhering to the top wall 101 and the first paddle part 21.

[0046] The first paddle part 21 can be arranged to extend linearly, extend in a bent shape, extend in a curved shape, etc. Exemplarily, the first paddle part 21 extends linearly. The orthographic projection of the first paddle part 21 on the horizontal projection perpendicular to the central axis C1 is in a straight line shape and along the radial direction of the kneading cylinder 100. In some embodiments, the orthographic projection of the first paddle part 21 on the horizontal projection perpendicular to the central axis C1 can also be in a bent or curved shape.

[0047] Please refer to Figure 1 and Figure 2, a convex portion 25 is provided on one side of the first paddle portion 21 and / or the third paddle portion 23 close to the top of the kneading cylinder 100. Herein, the top of the kneading cylinder 100 refers to the side of the kneading cylinder 100 close to the top wall 101. Along the axial direction of the kneading cylinder 100, the width of the convex portion 25 in the circumferential direction of the kneading cylinder 100 decreases from the side far from the top of the kneading cylinder 100 to the side close to the top of the kneading cylinder 100. In this embodiment, the convex portions 25 are respectively provided on the first paddle portion 21 and the third paddle portion 23. The surface of the convex portion 25 facing the top wall 101 is inclined or curved. When the first paddle portion 21 and the third paddle portion 23 scrape the material, the material can slide down along the surface of the convex portion 25 facing the top wall 101, thereby preventing the material from accumulating on the first paddle portion 21 and the third paddle portion 23. The convex portion 25 on the third paddle portion 23 can also push the material in the direction away from the bottom wall 103 when the third paddle portion 23 rotates, so as to improve the stirring effect of the third paddle portion 23 on the material, thereby improving the kneading efficiency of the material.

[0048] In some embodiments, the convex portion 25 and the first paddle portion 21 and the third paddle portion 23 can be separately provided. The convex portion 25 and the first paddle portion 21 and the third paddle portion 23 are respectively fixedly connected together by, but not limited to, screw connection, welding, bonding, snap connection and other methods. The cross-section of the convex portion 25 can be configured as a triangle, a trapezoid, a semi-circle, etc. In some embodiments, the convex portion 25 can be integrally formed with the first paddle portion 21 and the second paddle portion 22 respectively. For example, the first paddle portion 21 can be configured as a cylindrical structure, and the cross-section of the first paddle portion 21 is configured as a circle. Another example is that the first paddle portion 21 can also be configured as a triangular prism structure, and one of the edges of the first paddle portion 21 is close to the top wall 101. In some embodiments, the convex portion 25 is provided on one of the first paddle portion 21 and the third paddle portion 23.

[0049] Please refer to Figure 1 and Figure 5 , in some embodiments, along the radial direction of the kneading cylinder 100, the width of the second paddle portion 22 in the circumferential direction of the kneading cylinder 100 decreases from the side far from the central axis C1 of the kneading cylinder 100 to the side close to the kneading cylinder 100. The second paddle portion 22 includes a first paddle wall 22a and a second paddle wall 22b arranged opposite to each other in the circumferential direction of the kneading cylinder 100. An acute angle is formed between the first paddle wall 22a and the second paddle wall 22b. When the stirring paddle 200 drives the second paddle portion 22 to rotate, after scraping the material, the second paddle portion 22 can push the material in the direction close to the central axis C1 of the kneading cylinder 100, thereby improving the stirring effect of the second paddle portion 22 on the material and improving the kneading efficiency of the stirring paddle 200 on the material.

[0050] In some embodiments, one of the first paddle wall 22a and the second paddle wall 22b may be parallel to the radial direction of the kneading cylinder 100, and the other is arranged at an angle with respect to the radial direction of the kneading cylinder 100. For example, the cross-section of the second paddle part 22 may be configured as a right trapezoid. In some embodiments, the first paddle wall 22a and the second paddle wall 22b may be respectively arranged at an angle with respect to the radial direction of the kneading cylinder 100. For example, the cross-section of the second paddle part 22 may be configured as an isosceles trapezoid. Wherein, any one of the first paddle wall 22a and the second paddle wall 22b is inclined or bent towards the other, so that the width of the second paddle part 22 in the circumferential direction of the kneading cylinder 100 decreases from the circumferential side wall 102 towards the direction of the central axis C1. The cross-section of the second paddle part 22 may be configured as a trapezoid, a triangle, a semi-circle, etc.

[0051] Please refer to Figure 2 , Figure 3 and Figure 6 , the stirring paddle 200 further includes a first scraping member 221. The first scraping member 221 is disposed on a side of the second paddle part 22 away from the central axis C1 of the kneading cylinder 100. The first scraping member 221 and the second paddle part 22 may be fixedly connected together by, but not limited to, bonding, clamping, screwing, welding and other means. The first scraping member 221 extends along the extending direction of the second paddle part 22 to increase the connection area between the first scraping member 221 and the second paddle part 22 and improve the connection stability between the first scraping member 221 and the second paddle part 22. The first scraping member 221 is used to scrape off the material adhered to the circumferential side wall 102 when the second paddle part 22 rotates, and cooperate with the second paddle part 22 to push the material towards the direction of the central axis C1 of the kneading cylinder 100. Wherein, the first scraping member 221 may be in contact with the circumferential side wall 102 to improve the scraping effect on the material. The first scraping member 221 may be configured as an elastic structure to avoid damaging the circumferential side wall 102 when the first scraping member 221 scrapes the material. In some embodiments, the first scraping member 221 may be integrally formed with the second paddle part 22.

[0052] The first scraping member 221 includes a first surface 222 and a second surface 223 that are oppositely arranged in the radial direction of the kneading cylinder 100, and a first scraping surface 224 connected between the first surface 222 and the second surface 223. The first surface 222 is located on the side of the second surface 223 close to the second paddle part 22. The first surface 222 is connected to the second paddle part 22. Two first scraping surfaces 224 are provided. The two first scraping surfaces 224 are located on opposite sides of the first scraping member 221 in the circumferential direction of the kneading cylinder 100. The first scraping surface 224 is arranged at an obtuse angle with the first surface 222. The first scraping surface 224 is arranged at an acute angle with the second surface 223. The cross-sectional shape of the first scraping member 221 is generally trapezoidal. When the stirring paddle 200 rotates, the edge formed by the first scraping surface 224 and the second surface 223 scrapes the material from the circumferential side wall 102, and the material moves along the first scraping surface 224 towards the central axis C1 of the kneading cylinder 100, so that the material can be stirred while scraping the material, improving the kneading efficiency.

[0053] The stirring paddle blades 20 and the first scraping members 221 are respectively provided in multiple numbers. Among at least two second paddle parts 22, at least one first scraping member 221 is provided on each second paddle part 22, and the first scraping members 221 on different second paddle parts 22 are arranged in a staggered manner in the circumferential direction of the kneading cylinder 100. In this way, the first scraping members 221 on different second paddle parts 22 can scrape the materials at different positions in the axial direction of the kneading cylinder 100 on the circumferential side wall 102. Along the axial direction of the kneading cylinder 100, the length of the first scraping member 221 can be smaller than the length of the second paddle part 22, thereby reducing the resistance of the material borne by a single second paddle part 22 and avoiding the problems of bending or breaking of the second paddle part 22. In some embodiments, when the stirring paddle 200 rotates, the scraping working surfaces formed by the multiple first scraping members 221 cover the circumferential side wall 102.

[0054] Exemplarily, the first scraping member 221 can be provided in three numbers, and one first scraping member 221 is provided on each second paddle part 22. Among the three first scraping members 221, one first scraping member 221 is arranged at the end of one second paddle part 22 close to the first paddle part 21, another first scraping member 221 is arranged in the middle of another second paddle part 22 in the axial direction of the kneading cylinder 100, and the last first scraping member 221 is arranged at the end of the last second paddle part 22 close to the third paddle part 23. Along the axial direction of the kneading cylinder 100, the length of the first scraping member 221 is greater than or equal to one-third of the length of the second paddle part 22. In some embodiments, the number of the first scraping members 221 can also be set to two, four, five, etc., which are not specifically limited in the present invention. In some embodiments, multiple first scraping members 221 can also be provided on one second paddle part 22.

[0055] Please refer to...Figure 2 and Figure 7 The stirring paddle 200 further includes a second scraping member 231. The second scraping member 231 is disposed on a side of the third paddle portion 23 away from the first paddle portion 21. The second scraping member 231 and the third paddle portion 23 can be fixedly connected together by, but not limited to, bonding, clamping, screwing, welding and other means. The second scraping member 231 extends along the extending direction of the third paddle portion 23 to increase the connection area between the second scraping member 231 and the third paddle portion 23 and improve the connection stability between the second scraping member 231 and the third paddle portion 23. The second scraping member 231 is used to scrape the material adhered to the bottom wall 103 when the third paddle portion 23 rotates, and cooperate with the third paddle portion 23 to push the material in a direction away from the bottom wall 103. Wherein, the second scraping member 231 can be in contact with the bottom wall 103 to improve the scraping effect on the material. The second scraping member 231 can be configured as an elastic structure to avoid damaging the bottom wall 103 when the second scraping member 231 scrapes the material. In some embodiments, the second scraping member 231 can be integrally formed with the third paddle portion 23.

[0056] The second scraping member 231 includes a third surface 232 and a fourth surface 233 that are oppositely disposed along the axial direction of the kneading cylinder 100, and a second scraping surface 234 connected between the third surface 232 and the fourth surface 233. The third surface 232 is located on a side of the fourth surface 233 close to the third paddle portion 23. The third surface 232 is connected to the third paddle portion 23. Two second scraping surfaces 234 are provided, and the two second scraping surfaces 234 are located on opposite sides of the second scraping member 231 along the circumferential direction of the kneading cylinder 100. The second scraping surface 234 is disposed at an obtuse angle with the third surface 232. The second scraping surface 234 is disposed at an acute angle with the fourth surface 233. The cross-sectional shape of the second scraping member 231 is generally trapezoidal. When the stirring paddle 200 rotates, the edge formed by the second scraping surface 234 and the fourth surface 233 scrapes the material off the bottom wall 103, and the material moves along the second scraping surface 234 in a direction away from the bottom wall 103, so that the material can be stirred while scraping the material, improving the kneading efficiency.

[0057] The stirring blades 20 and the second scraping members 231 are respectively provided in plurality. In at least two third paddle parts 23, at least one second scraping member 231 is provided on each third paddle part 23, and the second scraping members 231 on different third paddle parts 23 are arranged in a staggered manner along the circumferential direction of the kneading cylinder 100. In this way, the second scraping members 231 on different third paddle parts 23 can scrape the materials at different positions in the radial direction of the kneading cylinder 100 on the bottom wall 103. And along the radial direction of the kneading cylinder 100, the length of the second scraping member 231 can be smaller than the length of the third paddle part 23, so as to reduce the resistance of the materials borne by a single third paddle part 23 and avoid the problems of bending or breaking of the third paddle part 23. In some embodiments, when the stirring paddle 200 rotates, the scraping working surfaces formed by the plurality of second scraping members 231 cover the bottom wall 103.

[0058] Exemplarily, the second scraping member 231 can be provided in three, and one second scraping member 231 is provided on each third paddle part 23. Among the three second scraping members 231, one second scraping member 231 is arranged at the end of one third paddle part 23 close to the second paddle part 22, another second scraping member 231 is arranged at the middle of another third paddle part 23 in the radial direction of the kneading cylinder 100, and the last second scraping member 231 is arranged at the end of the last third paddle part 23 far from the second paddle part 22. Along the radial direction of the kneading cylinder 100, the length of the second scraping member 231 is greater than or equal to one third of the length of the third paddle part 23. In some embodiments, the number of the second scraping members 231 can also be set to two, four, five, etc., which is not specifically limited in the present utility model. In some embodiments, multiple second scraping members 231 can also be provided on one third paddle part 23.

[0059] Please refer to Figure 8 and Figure 9 At the same time, in some embodiments, the third paddle part 23 includes a first sub-paddle part 2301 and a second sub-paddle part 2302. One end of the first sub-paddle part 2301 is connected to the end of the second paddle part 22 far from the first paddle part 21, and the other end of the first sub-paddle part 2301 is connected to the second sub-paddle part 2302. A folding angle part 2303 is formed by bending at the connection part of the first sub-paddle part 2301 and the second sub-paddle part 2302. Wherein, the end of the second sub-paddle part 2302 far from the first sub-paddle part 2301 is connected to the connecting member 24. The folding angle part 2303 is in a "V" shape or a "U" shape.

[0060] The first sub-paddle part 2301 includes, but is not limited to, being arranged to extend linearly, extend in a bent manner, or extend in a curved manner. The second sub-paddle part 2302 includes, but is not limited to, being arranged to extend linearly, extend in a bent manner, or extend in a curved manner. Exemplarily, both the first sub-paddle part 2301 and the second sub-paddle part 2302 are arranged in a bent manner. The end of the first sub-paddle part 2301 close to the second paddle part 22 extends in the radial direction of the kneading cylinder 100, and the extending direction of the end close to the second sub-paddle part 2302 is arranged at an angle with the radial direction of the kneading cylinder 100. The extending direction of the end of the second sub-paddle part 2302 close to the first sub-paddle part 2301 is arranged at an angle with the radial direction of the kneading cylinder 100, and the end far from the first sub-paddle part 2301 extends in the radial direction of the kneading cylinder 100. The third paddle part 23 as a whole is arranged to extend substantially in the radial direction of the kneading cylinder 100. The second scraping member 231 can be arranged on the first sub-paddle part 2301 and / or the second sub-paddle part 2302.

[0061] In some embodiments, a discharge port is provided on the bottom wall 103 of the kneading cylinder 100. The kneading cylinder 100 can discharge the material to the outside of the kneading cylinder 100 through the discharge port. The discharge port is arranged deviating from the center of the bottom wall 103 so that the discharge port avoids the central area of the kneading cylinder 100 where material blockage is likely to occur, making it easier for the material to be discharged from the discharge port and improving the discharging efficiency of the kneading machine 1.

[0062] When the stirring paddle 200 rotates, the folding part 2303 passes through the discharge port during rotation. When the folding part 2303 rotates to above the discharge port, at least part of the orthographic projection of the folding part 2303 on the bottom wall 103 is located inside the discharge port. Among them, the folding part 2303 has a concave side and a convex side. When the stirring paddle 200 rotates, the folding part 2303 rotates from the convex side to the concave side (as shown by the Y direction in Figure 9 ). Thus, when the stirring paddle 200 rotates, since both the end of the first sub-paddle part 2301 close to the second sub-paddle part 2302 and the end of the second sub-paddle part 2302 close to the first sub-paddle part 2301 are arranged at an angle with the radial direction of the kneading cylinder 100, when the first sub-paddle part 2301 and the second sub-paddle part 2302 push the material to move, the material will slide along the first sub-paddle part 2301 and the second sub-paddle part 2302 to the position of the folding part 2303, causing the material to gather towards the discharge port, thereby making it easier for the material to be discharged from the discharge port and improving the discharging efficiency. In addition, when the first sub-paddle part 2301 and the second sub-paddle part 2302 push the material to move, the direction of the resistance of the material to the first sub-paddle part 2301 and the second sub-paddle part 2302 is at an angle with the extending direction of the first sub-paddle part 2301 and the second sub-paddle part 2302, which can cause the first sub-paddle part 2301 and the second sub-paddle part 2302 to form a "cutting" effect on the material, thereby reducing the movement resistance when the third paddle part 23 rotates, avoiding the problem of breakage of the third paddle part 23, and avoiding the problem of overload of the driver.

[0063] Please refer to Figure 1 Figure 1 , the kneader 1 further includes a dispersion paddle 40. The dispersion paddle 40 is used to disperse, stir and knead the material. The dispersion paddle 40 includes a dispersion shaft 41, dispersion blades 42 and dispersion teeth 43. The dispersion shaft 41 is rotatably connected to the kneading cylinder 100. The dispersion blades 42 and the dispersion teeth 43 are accommodated in the kneading cylinder 100. The dispersion blades 42 are fixedly connected to the dispersion shaft 41. The dispersion teeth 43 are fixedly connected to the dispersion blades 42. Wherein, when the dispersion shaft 41 drives the dispersion blades 42 to rotate, the dispersion teeth 43 on the dispersion blades 42 can break up the material, and the dispersion blades 42 can drive the material to move away from the bottom wall 103. When the kneader 1 is working, the dispersion paddle 40 and the third paddle part 23 jointly push the material to move away from the bottom wall 103. When the stirring paddle 200 is in the forward rotation state, the second paddle part 22 pushes the material towards the direction of the central axis C1 of the kneading cylinder 100 and towards the direction close to the bottom wall 103, so that the material tumbles in the kneading cylinder 100, thereby dispersing and kneading the material. In some cases, when the rotational resistance of the stirring paddle 200 is too large and it is difficult for the stirring paddle 200 to rotate, the driver can drive the rotating shaft 30 to reverse, so that the stirring paddle 200 is in the reverse rotation state. At this time, the second paddle part 22 can push the material towards the direction of the central axis C1 of the kneading cylinder 100 and towards the direction away from the bottom wall 103, thereby reducing the rotational resistance of the stirring paddle 200 and avoiding the problem of overload of the driver.

[0064] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of various equivalent modifications or substitutions, and these modifications or substitutions should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A stirring paddle, accommodated in a kneading cylinder of a kneading machine, characterized in that: The stirring paddle comprises a plurality of stirring blades, which are arranged along the circumferential direction of the kneading cylinder and are used to rotate around the central axis of the kneading cylinder, and each stirring blade comprises: A first paddle portion is extended relative to the central axis of the kneading cylinder and toward the peripheral side wall of the kneading cylinder; a second paddle portion connected to the end of the first paddle portion away from the central axis of the kneading cylinder, the second paddle portion being arranged close to the peripheral side wall of the kneading cylinder, and being used to push the material in the kneading cylinder along the axial direction and the circumferential direction of the kneading cylinder; and The third paddle part is connected to the end of the second paddle part away from the first paddle part, and is extended toward a direction close to the central axis of the kneading machine.

2. The stirring paddle according to claim 1, characterized in that: On a plane perpendicular to the axial direction of the kneading cylinder, the orthographic projections of two opposite ends of the second paddle portion along the circumferential direction of the kneading cylinder are staggered.

3. The stirring paddle according to claim 2, characterized in that: The second paddle portion is extended in a spiral shape.

4. The stirring paddle according to claim 2, characterized in that: On a plane perpendicular to the central axis of the kneading cylinder, the orthographic projection of the second paddle portion is an arc segment with the central axis of the kneading cylinder as the center.

5. The stirring paddle according to claim 4, characterized in that: The central angle corresponding to the orthographic projection of the second paddle portion ranges from 30° to 120°.

6. The stirring paddle according to claim 1, characterized in that: The stirring paddle further includes a connecting piece, and an end of the third paddle portion of at least some of the stirring paddles among the plurality of stirring paddles, which is away from the second paddle portion, is connected to the connecting piece.

7. The stirring paddle according to claim 1, characterized in that: The third paddle portion includes a first sub-paddle portion and a second sub-paddle portion, one end of the first sub-paddle portion is connected to the second paddle portion, the other end of the first sub-paddle portion is connected to the second sub-paddle portion, and the connection between the first sub-paddle portion and the second sub-paddle portion is bent to form a corner portion.

8. The stirring paddle according to claim 1, characterized in that: Along the axial direction of the kneading cylinder, a distance between an end of the first paddle portion away from the second paddle portion and the third paddle portion is greater than a distance between an end of the first paddle portion close to the second paddle portion and the third paddle portion.

9. The stirring paddle according to claim 1, characterized in that: Along the radial direction of the kneading cylinder, the width of the second paddle portion along the circumferential direction of the kneading cylinder decreases from a side away from the central axis of the kneading cylinder to a side close to the kneading cylinder.

10. The stirring blade according to claim 1, characterized in that: A protrusion is provided on one side of the first paddle portion and / or the third paddle portion close to the top of the kneading cylinder, and along the axial direction of the kneading cylinder, the width of the protrusion along the circumferential direction of the kneading cylinder decreases from the side away from the top of the kneading cylinder to the side close to the top of the kneading cylinder.

11. The stirring blade according to claim 1, characterized in that: The stirring paddle also includes a first scraping member, which is arranged on a side of the second paddle portion away from the central axis of the kneading cylinder. The first scraping member includes a first surface and a second surface arranged opposite to each other along the radial direction of the kneading cylinder, and a first scraping surface connected between the first surface and the second surface. The first surface is located on a side of the second surface close to the second paddle portion, the first scraping surface is arranged at an obtuse angle to the first surface, and the first scraping surface is arranged at an acute angle to the second surface.

12. The stirring blade according to claim 11, characterized in that: The stirring blades and the first scraping member are respectively provided in plurality, and in at least two of the second paddle parts, each of the second paddle parts is provided with at least one first scraping member, and the first scraping members on different second paddle parts are staggered along the circumferential direction of the kneading cylinder.

13. The stirring blade according to claim 1, characterized in that: The stirring paddle also includes a second scraping member, which is arranged on a side of the third paddle portion away from the first paddle portion. The second scraping member includes a third surface and a fourth surface that are arranged opposite to each other along the axial direction of the kneading cylinder, and a second scraping surface connected between the third surface and the fourth surface. The third surface is located on a side of the fourth surface close to the third paddle portion, the second scraping surface is arranged at an obtuse angle to the third surface, and the second scraping surface is arranged at an acute angle to the fourth surface.

14. The stirring blade according to claim 13, characterized in that: The stirring blades and the second scraping member are respectively arranged in plurality, and in at least two of the third paddle parts, each of the third paddle parts is provided with at least one second scraping member, and the second scraping members on different third paddle parts are staggered along the circumferential direction of the kneading cylinder.

15. A kneading machine, characterized in that: The kneading machine comprises a kneading cylinder and a stirring paddle as described in any one of claims 1 to 14, wherein the stirring paddle is arranged in the kneading cylinder.

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