Feeding screw and feeding machine

Abstract

The invention belongs to the technical field of battery preparation, and provides a feeding screw and a feeding machine. The feeding screw comprises a main body part and an end part; the main body part comprises a main body rod and a first screw flight arranged on the main body rod; the end part comprises an end rod and a second screw flight arranged on the end rod, the end rod is detachably connected to the first end of the main body rod to form an integral rod, the first screw flight and the second screw flight are connected to form a continuous material pushing screw flight after connection, and the second end of the main body rod is used for being connected with a power assembly; the direction from the second end to the first end is a material conveying direction; the material pushing screw flight is provided with a material pushing face, the material pushing face intersects with any axial section of the integral rod to form a plurality of arc lines which are arranged at intervals in the axial direction of the integral rod, and each arc line comprises a concave first arc line. The feeding screw aims at reducing the influence of the rough surface of the tail end of the feeding screw in the feeding machine on the retention time and the aggravated bonding and drying degree of slurry so as to reduce the influence on the quality of the slurry.

Description

Technical Field

[0001] This application belongs to the technical field of battery preparation, and particularly relates to a feeding screw and a feeder. Background Art

[0002] With the rise of new energy devices represented by new energy vehicles, battery devices have become the key power source. A battery device includes battery cells, and the battery cells are the main components for charging and discharging. Inside the battery cells, there is an electrode assembly, and the electrode assembly includes positive and negative electrode plates and a separator. In the production and preparation process of the electrode plates in the electrode assembly, a coating process is involved. For example, a slurry is coated on the surface of a current collector, and the slurry is fed through a feeding screw in a feeder. The outlet of the feeder is small, and the outlet speed is less than the inlet speed. Therefore, slurry accumulation occurs at the outlet of the feeder, that is, at the end part of the feeding screw.

[0003] During the long-term use of the feeding screw, the end of the feeding screw will be damaged, making the surface of the end of the feeding screw rough, which exacerbates the adhesion degree of the slurry at the end of the feeding screw and the residence time of the slurry at the end, resulting in increased drying of the slurry and aggravating the impact on the quality of the slurry. Summary of the Invention

[0004] In view of the above problems, this application provides a feeding screw and a feeder, aiming to reduce the influence of the rough surface of the end of the feeding screw in the feeder on the residence time, adhesion, and increased drying degree of the slurry, so as to reduce the quality impact on the slurry.

[0005] To solve the above problems, in a first aspect, this application provides a feeding screw, including: A main body part, the main body part includes a main body rod and a first thread rib arranged on the main body rod; and A head part, the head part includes a head rod and a second thread rib arranged on the head rod. The head rod is detachably connected to the first end of the main body rod to form an integral rod. After connection, the first thread rib and the second thread rib are joined and form a continuous pushing thread rib. The second end of the main body rod is used to connect a power assembly, and the direction from the second end to the first end is the material conveying direction; the pushing thread rib has a pushing surface, and the pushing surface intersects with any axial section of the integral rod to form multiple arcs arranged at intervals along the axial direction of the integral rod. The arc includes a first circular arc line that is concave inward.

[0006] Therefore, the effect of this embodiment is that due to the replacement operation of the end head, the surface of the end head, that is, the end surface of the feeding screw, can be kept smooth, avoiding the adhesion and drying of materials, reducing the quality impact on the materials in the feeder, and when the end surface of the feeding screw is severely worn, only the end head needs to be replaced, without replacing the entire feeding screw, nor disassembling and reorganizing the connection structure between the feeding screw and the power component, and the replacement speed is faster.

[0007] In an embodiment of the first aspect, the arc radius corresponding to the first arc line is 100 mm to 350 mm.

[0008] The effect of this embodiment is that the entire pushing surface forms a concave large arc surface structure. Through experiments, the pushing surface with the arc surface structure has a higher pushing efficiency and a faster pushing speed compared with the traditional trapezoidal thread rib, thus reducing the accumulation of materials.

[0009] In an embodiment of the first aspect, the surface of the overall rod intersects with the axial section to form a surface line, and the arc further includes a concave second arc line, and both ends of the second arc line are respectively connected to the first arc line and the surface line.

[0010] In an embodiment of the first aspect, the arc radius corresponding to the second arc line is greater than 20 mm.

[0011] The effect of this embodiment is that the position where the pushing surface is connected to the surface of the overall rod is transitioned by a fillet, that is, transitioned by an arc surface, avoiding the formation of a sharp angle, thus reducing the possibility of materials remaining on the surface of the overall rod and facilitating the rapid transportation of materials.

[0012] In an embodiment of the first aspect, the first end of the main rod is provided with a plug connector, the end rod is provided with a plug hole, and the plug connector is used to plug into the plug hole to connect the end rod to the main rod. The length of the plug connector in the axial direction of the plug hole is less than the length of the plug hole in the axial direction of the plug hole. The effect is that the length of the plug connector is less than the depth of the plug hole, so that the plug connector can complete the connection without having to be inserted into the entire plug hole. At the same time, when disassembling, the end rod does not have to be pulled out a long distance to complete the disassembly.

[0013] In an embodiment of the first aspect, the main body portion has a first mating section, the end head portion has a second mating section, and after the plug connector is inserted into the plug hole, the first mating section and the second mating section are adapted and fitted to each other; wherein, the first mating section includes a first radial surface arranged along the radial direction of the main rod and a first axial surface arranged along the axial direction of the main rod; The second mating section includes a second radial surface adapted to fit snugly against the first radial surface and a second axial surface adapted to fit snugly against the first axial surface.

[0014] The effect of this embodiment is that since there are both radial and axial surfaces for docking between the main body portion and the end head portion, the axial surface can be relied on to transmit the rotational force when the main body portion drives the end head portion to rotate, making the transmission between the two more stable. At the same time, the radial surface is relied on to achieve radial limitation, strengthening the stability of the connection and the consistency of rotation between the two.

[0015] In an embodiment of the first aspect, the first axial surface at least includes a first thread section at the end of the first thread ridge, and the second axial surface at least includes a second thread section at the end of the second thread ridge that fits against the first thread section.

[0016] In an embodiment of the first aspect, the first thread section and the second thread section transmit the rotational force by contacting each other.

[0017] The effect of this embodiment is that the axial section is conducive to the transmission of the rotational force. The first thread section and the second thread section have a relatively large width axially, and the two fit face to face, which is conducive to transmitting the acting force in the circumferential direction, and thus realizing the axial rotation of the main body portion and the end head portion with a relatively low driving force. Moreover, the axial thread section is easy to process and has a stable structure.

[0018] In an embodiment of the first aspect, the first axial surface includes an axial section of the main body rod located on the main body rod, and the first radial surface includes a radial section of the main body rod located on the main body rod; the second axial surface includes an axial section of the end head rod that fits against the axial section of the main body rod and is located on the end head rod; the second radial surface includes a radial section of the end head rod that fits against the radial section of the main body rod and is located on the end head rod.

[0019] In this embodiment, when the main body rod and the end head rod are docked with each other, they are also docked through the surfaces in two directions, namely radial and axial, which is conducive to the transmission of force and the stability of motion and structure.

[0020] In an embodiment of the first aspect, the two ends of the axial section of the main body rod in the axial direction of the main body rod are respectively connected to the radial section of the main body rod and form a stepped section, and a shape adapted to fit against the stepped section is formed between the axial section of the end head rod and the radial section of the end head rod.

[0021] The effect of this embodiment is that the stepped section has better docking accuracy during docking.

[0022] In an embodiment of the first aspect, the fitting gap between the first fitting section and the second fitting section is less than or equal to 0.5 mm, and a sealing gasket is provided between the first fitting section and the second fitting section. The effect is that the fitting gap between the first fitting section and the second fitting section is less than or equal to 0.5 mm, which makes the formed integral rod and the pushing screw rib have better flatness and continuity, and the integral effect is better. At the same time, in order not to leave materials in the gap, this embodiment also provides a sealing gasket, which can be a rubber gasket, etc. It is arranged between the fitting sections to fill the gap and reduce the possibility of clamping materials in the gap.

[0023] In an embodiment of the first aspect, the inner walls of the socket and the socket hole are rotationally stopped by means of a key connection.

[0024] In an embodiment of the first aspect, a locking block is provided in the socket hole. The socket is inserted into the socket hole and connected to the locking block. The locking block is used for axially limiting the end rod to prevent the end rod from axially separating from the socket. The setting of this embodiment prevents the socket from axially separating from the socket hole.

[0025] In an embodiment of the first aspect, the locking block is provided with a through hole, and the socket is provided with a threaded hole opposite to the through hole. The through hole is used for passing a suitable bolt, and the threaded section of the bolt is threadedly connected in the threaded hole to lock and fix the locking block relative to the socket.

[0026] The connection method of this embodiment is simple and convenient to operate. By tightening or loosening the bolt, the connection and disassembly between the locking block and the socket can be realized. After disassembly, the end rod can be separated from the socket, which facilitates the operation of replacing the end head.

[0027] In an embodiment of the first aspect, the through hole is a counterbore. The counterbore includes a larger hole and a smaller hole coaxially connected. The nut of the bolt is located in the larger hole, and the threaded rod is located in the smaller hole and passes through the smaller hole. The nut is located in the larger hole and cannot enter the smaller hole, which is beneficial to axially limit the movement of the bolt.

[0028] In an embodiment of the first aspect, the locking block is also welded to the inner wall of the socket hole. Further increase the firmness of the locking block.

[0029] In an embodiment of the first aspect, an end head made of a polymer material is assembled at one end of the end rod away from the main rod. The end head is assembled in the socket hole, and the exposed surface of the end head outside the socket hole is smoothly transitioned with the surface of the end rod.

[0030] The effect of this embodiment is that the end has high wear resistance, the plugging hole is blocked, and the smooth transition between the exposed part and the surface of the end rod can avoid material accumulation at the head. In addition, the end of the feeding screw is the position most prone to corrosion and wear. The end is a separate and separable independent component and can be replaced at any time.

[0031] In an embodiment of the first aspect, the end is in interference fit with the inner wall of the plugging hole. A protrusion is provided on one side of the end located inside the plugging hole, and a receiving portion for receiving the protrusion and adapted to the shape of the protrusion is provided on the locking block.

[0032] The effect of this embodiment is that the fixation of the end is achieved, and the disassembly and assembly are both convenient and fast.

[0033] In an embodiment of the first aspect, the material of the end includes one or more of polytetrafluoroethylene, polyethylene, and polyetheretherketone. This embodiment provides a variety of materials that can be used for the end, which can be selected adaptively according to needs, and these materials all have good wear resistance.

[0034] In an embodiment of the first aspect, the material of the end head is alloy steel with nitriding treatment on the surface and a coating. The surface roughness Ra of the end head is less than 0.1 μm. The effect of this embodiment is that the wear resistance of the end head is improved and the material adhesion on the surface of the end head is reduced.

[0035] In an embodiment of the first aspect, the coating includes one or more of tungsten carbide, titanium nitride, alumina ceramic, polytetrafluoroethylene, and diamond-like carbon. The coating materials in this embodiment can all reduce the surface roughness and can be selected adaptively according to needs.

[0036] In an embodiment of the first aspect, a diversion channel is provided inside the main body rod, and the diversion channel is used for circulating a cooling medium. The diversion channel is a flow channel provided inside the main body rod for circulating the cooling medium, and the cooling medium can circulate inside the diversion channel to reduce the temperature of the main body rod during operation.

[0037] In the second aspect, the present application also provides a feeder, including the feeding screw provided in any of the above embodiments.

[0038] The above description is only an overview of the technical solution of the present application. In order to be able to understand the technical means of the present application more clearly, it can be implemented according to the content of the specification. And in order to make the above and other purposes, features, and advantages of the present application more obvious and understandable, the specific embodiments of the present application are hereinafter specifically described. Brief Description of the Drawings

[0039] To more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the accompanying drawings required for the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0040] Figure 1 Structural schematic diagram of a feeder provided in some embodiments of the present application; Figure 2 Structural schematic diagram of a feeding screw provided in some embodiments of the present application; Figure 3 For Figure 2 exploded structural schematic diagram of the feeding screw in Figure 4 For Figure 2 cross-sectional structural schematic diagram of the feeding screw along the A-A direction in Figure 5 For Figure 4 enlarged structural schematic diagram at position A in

[0041] The reference numerals in the specific embodiments are as follows: 100, feeder; 10, feeding screw; 101, main body part; 102, main body rod; 103, first thread edge; 104, end head part; 105, end head rod; 106, second thread edge; 107, overall rod; 108, pushing thread edge; 109, pushing surface; 110, arc; 111, first arc line; 112, surface line; 113, second arc line; 114, insertion joint; 115, insertion hole; 1, first mating section; 11, first radial plane; 12, first axial plane; 13, first thread edge section; 14, main body rod axial section; 15, main body rod radial section; 2, second mating section; 21, second radial plane; 22, second axial plane; 23, second thread edge section; 24, end head rod axial section; 25, end head rod radial section; 3, locking block; 4, bolt; 5, threaded hole; 6, end head; 7, protrusion; 8, diversion channel; 9, planar structure. Specific embodiments

[0042] The following will describe in detail the embodiments of the technical solutions of the present application with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present application, so they are only examples and cannot be used to limit the protection scope of the present application.

[0043] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this application belongs; the terms used herein are for the purpose of describing specific embodiments only and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above drawings are intended to cover non-exclusive inclusion.

[0044] In the description of the embodiments of this application, technical terms such as "first" and "second" are only used to distinguish different objects and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity, specific order or primary-secondary relationship of the indicated technical features. In the description of the embodiments of this application, the meaning of "a plurality" is more than two, unless otherwise specifically defined.

[0045] Reference to "embodiment" herein means that a particular feature, structure or characteristic described in connection with the embodiment can be included in at least one embodiment of this application. The phrase appears in various places in the specification and 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 will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0046] In the description of the embodiments of this application, the term "and / or" is merely a description of the association relationship of associated objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " herein generally represents an "or" relationship between the associated objects before and after.

[0047] In the description of the embodiments of this application, the term "a plurality" refers to more than two (including two). Similarly, "a plurality of groups" refers to more than two groups (including two groups), and "a plurality of pieces" refers to more than two pieces (including two pieces).

[0048] In the description of the embodiments of this application, the orientation or positional relationship indicated by technical terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the embodiments of this application and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of this application.

[0049] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installation", "connection", "connection", "fixation" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can also be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific situations.

[0050] Currently, from the perspective of the development of the market situation, the application of battery devices is becoming more and more extensive. Battery devices are not only used in energy storage power systems such as hydraulic, thermal, wind, and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, and electric vehicles, as well as in many fields such as military and police equipment and aerospace. With the continuous expansion of the battery application field, the market demand is also continuously increasing.

[0051] The battery device is a complete structural entity, including a box body. Inside the box body, a plurality of battery cells are arranged. In some special scenarios, a single battery cell can also be arranged inside the box body. When there are multiple battery cells, the battery cells in the same row can form a battery cell assembly.

[0052] The battery cell includes a housing and an electrode assembly arranged inside the housing. The electrode assembly includes positive and negative electrode plates and a separator. The positive electrode plate includes a positive current collector and a positive electrode paste coated on the positive current collector. The negative electrode plate includes a negative current collector and a negative electrode paste coated on the negative current collector.

[0053] Therefore, in the manufacturing process, it is necessary to prepare the positive electrode paste and the negative electrode paste. By mixing different materials, adding a glue solution and stirring, a paste that meets the parameter requirements is obtained. In addition, the prepared paste can be sieved to filter out large particles or precipitates in the paste. After the paste preparation is completed, the paste is coated on the surface of the current collector. For example, the positive electrode paste is extruded and coated or sprayed on the surface of the positive current collector; the negative electrode paste is extruded and coated or sprayed on the surface of the negative current collector. After the coating is completed, the electrode plate is roll-pressed to further compact the coated electrode plate, thereby improving the compaction density of the electrode plate. Subsequently, operations such as slitting and sheet making can also be performed on the electrode plate for subsequent winding or stacking processes.

[0054] The paste is generally fed through a feeder. The discharge port of the feeder in the related art is small, and the discharge speed of the discharge port is slow. However, the feeding speed of the feeder is greater than the discharge speed. Therefore, the paste is easily accumulated at the discharge port, that is, at the end part of the feeding screw. The paste will dry to a certain extent after being accumulated for a long time.

[0055] During the long-term use, the end part of the feeding screw will be worn and corroded, resulting in a poor surface finish of the end part and a rough surface, which exacerbates the adhesion degree of the slurry at the end of the feeding screw and the residence time of the slurry at the end, making the drying of the slurry more serious and affecting the quality of the slurry.

[0056] To solve the above problems, the present application provides a feeding screw 10, which adopts a way that the end head 104 can be disassembled and replaced, so that the surface of the end part of the feeding screw 10 maintains a good surface finish, reduces the adhesion degree and residence time of the slurry, thereby minimizing the drying degree of the slurry at the end part of the feeding screw 10 and reducing the quality impact on the slurry in the feeder 100.

[0057] Please refer to Figures 2 - 4 , the feeding screw 10 provided by the present application includes a main body part 101 and an end head part 104.

[0058] The main body part 101 includes a main body rod 102 and a first thread edge 103 provided on the main body rod 102; the end head part 104 includes an end head rod 105 and a second thread edge 106 provided on the end head rod 105. The end head rod 105 is detachably connected to the first end of the main body rod 102 to form an integral rod 107, and after connection, the first thread edge 103 and the second thread edge 106 are connected to form a continuous feeding thread edge 108. The second end of the main body rod 102 is used to connect a power assembly, and the direction from the second end to the first end is the material conveying direction.

[0059] Specifically, the main body part 101 and the end head part 104 are respectively part of the feeding screw 10. The length of the main body part 101 is greater than the length of the end head part 104. The end head part 104 refers to a section near the end of the feeding screw 10 in the material conveying direction. The proportion of the length of the end head part 104 in the total length of the feeding screw 10 can be set as required and can be adaptively selected according to the accumulation degree of the material. The material refers to the slurry used for coating on the surface of the electrode sheet.

[0060] The main body rod 102 and the end head rod 105 are respectively the central axis rods of the main body part 101 and the end head part 104. After they are connected, an integral rod 107 is formed. After forming the integral rod 107, the axes of the main body rod 102 and the end head rod 105 coincide, which is the axis of the integral rod 107. The second end of the main body rod 102 is connected to a power assembly, such as a motor, etc. Through the drive of the power assembly, it rotates self-driven and drives the end head rod 105 to rotate, realizing the self-rotation of the integral rod 107.

[0061] The first screw ridge 103 of the main rod 102 and the second screw ridge 106 of the end head 104 can be docked to form an integral pushing screw ridge 108. The first screw ridge 103 and the second screw ridge 106 are respectively sheet structures extending in a spiral form and arranged on the surface of the main rod 102 and the end rod 105. The pushing screw ridge 108 formed after the two are docked is a continuous structure. Through the rotation of the integral rod 107, the pushing screw ridge 108 can realize the pushing and conveying of the material.

[0062] The continuous pusher screw 108 refers to a continuous integral structure formed after the first screw 103 and the second screw 106 are connected. The formed pusher screw 108 has no partition in the extension direction, and the curved surfaces of the first screw 103 and the second screw 106 are smoothly transitioned at the connection position without sudden corners or turns.

[0063] The detachable connection between the end portion 104 and the main body 101 in this embodiment means that once connected, the two are relatively fixed and cannot move relative to each other in the axial or radial directions. However, the two are separable. If the end portion 104 is corroded by the material and its surface is worn, the end portion 104 can be promptly removed and replaced. This maintains the surface smoothness of the end portion of the feeding screw 10, reduces material adhesion, and minimizes the impact on material quality.

[0064] Therefore, the effect of this embodiment is that, due to the replacement operation of the end head 104, the surface of the end head 104, that is, the end surface of the feeding screw 10, can be kept smooth, reducing the adhesion degree and residence time of the material, thereby minimizing the degree of drying of the material at the end part of the feeding screw 10, reducing the impact on the quality of the material in the feeder 100, and when the end surface of the feeding screw 10 is severely worn, only the end head 104 needs to be replaced, without replacing the entire feeding screw 10, and without disassembling and reorganizing the connection structure between the feeding screw 10 and the power assembly, and the replacement speed is faster.

[0065] In some embodiments, see Figure 2 、 Figure 4 and Figure 5 The pusher screw 108 has a pusher surface 109 , which intersects with any axial cross section of the integral rod 107 to form a plurality of arcs 110 spaced apart along the axial direction of the integral rod 107 , and the arcs 110 include a first concave circular arc 111 .

[0066] Specifically, the feeding screw rib 108 is an integral screw rib extending from one end of the integral rod 107 to the other end, which has two sides, and the side facing the end of the integral rod 107 away from the power assembly is the feeding surface 109. The integral rod 107 formed after the end head rod 105 and the main body rod 102 are connected has an axis, so any cross-section passing through this axis is an axial cross-section, that is, the axis is completely located on this axial cross-section. Among them, the feeding surface 109 forms a plurality of arcs 110 arranged at intervals along the axis on the axial cross-section, and each arc 110 includes a concave first circular arc line 111. The feeding screw rib 108 forms a plurality of planar structures 9 arranged at intervals along the axis on this axial cross-section. The arc 110 can be regarded as one side of the planar structure 9, and the concavity of the arc 110 means that the arc 110 is recessed towards the side of the planar structure 9, or towards the side close to the integral rod 107.

[0067] The effect of this embodiment is that the entire feeding surface 109 forms a concave circular arc surface structure. Through experiments, the feeding surface 109 with a circular arc surface structure has a higher feeding efficiency and a faster feeding speed compared with the traditional trapezoidal screw rib, which reduces the stacking time of materials and reduces the degree of drying of materials.

[0068] In the feeding screw rib 108 of this embodiment, along the axis of the integral rod 107, the pitch can be gradually changed or fixed in the axial direction, and the depth of the screw groove can also be gradually changed or fixed. The pitch can be regarded as the distance between adjacent arcs 110 in the axial direction on the axial cross-section, and the depth of the screw groove can be regarded as the distance from the outer end of the arc 110 away from the integral rod 107 to the integral rod 107 on the axial cross-section.

[0069] In some embodiments, the radius of the circular arc corresponding to the first circular arc line 111 is 100 mm to 350 mm.

[0070] Within this range of the radius of the circular arc, there is a better feeding efficiency.

[0071] In some embodiments, please refer to Figure 2 、 Figure 4 and Figure 5 , the surface of the integral rod 107 intersects with the axial cross-section to form a surface line 112. The arc 110 further includes a concave second circular arc line 113, and the two ends of the second circular arc line 113 are respectively connected to the first circular arc line 111 and the surface line 112.

[0072] Specifically, on the above-mentioned axial cross-section, the pushing screw rib 108 forms a planar structure 9 on the axial cross-section, and the surface of the overall rod 107 forms a linear structure, namely the surface line 112. The surface of the overall rod 107 forms a linear surface line 112 on the axial cross-section. Therefore, the surface line 112 is connected to the arc 110. The arc 110 includes not only the first circular arc line 111 but also the second circular arc line 113. The two ends of the second circular arc line 113 are respectively connected to the bottom end of the first circular arc line 111 and the surface line 112.

[0073] The effect of this embodiment is that the position where the pushing surface 109 is connected to the surface of the overall rod 107 is transitioned by a fillet, that is, by an arc surface, avoiding the formation of a sharp angle. This reduces the possibility of the material remaining on the surface of the overall rod 107 and is conducive to the rapid conveying of the material.

[0074] In some embodiments, the radius of the circular arc corresponding to the second circular arc line 113 is greater than 20 mm. In this way, a large arc surface is used for transition, which has a better effect.

[0075] In some embodiments, please refer to Figure 3 and Figure 4 , the first end of the main body rod 102 is provided with a plug connector 114, and the end head rod 105 is provided with a plug hole 115. The plug connector 114 is used to plug into the plug hole 115 to connect the end head rod 105 to the main body rod 102. The length of the plug connector 114 in the axial direction of the plug hole 115 is less than the length of the plug hole 115 in the axial direction of the plug hole 115.

[0076] Specifically, the connection method between the main body rod 102 and the end head rod 105 is plug connection, and an integral overall rod 107 is formed after connection. The plug connector 114 is arranged on the end face of the main body rod 102, and the plug hole 115 is opened on the end head rod 105. The two are plugged into each other and are relatively fixed after plugging.

[0077] The length of the plug connector 114 is less than the depth of the plug hole 115. In this way, the plug connector 114 can complete the connection without having to be plugged into the entire plug hole 115. At the same time, when disassembling, the end head rod 105 does not have to be pulled out a long distance to complete the disassembly.

[0078] The effect of this embodiment is that since the internal space of the feeder 100 is limited, and the end head part 104 is close to or located at the discharge port, the disassembly space is limited. Selecting a short pulling-out distance makes the disassembly and assembly more convenient and fast, and improves the replacement efficiency of the end head part 104.

[0079] In some embodiments, please refer to Figure 3, the main body part 101 has a first mating section 1, the end head part 104 has a second mating section 2, and after the plug connector 114 is inserted into the plug hole 115, the first mating section 1 and the second mating section 2 are adapted and fitted to each other; Among them, the first mating section 1 includes a first radial surface 11 arranged along the radial direction of the main body rod 102 and a first axial surface 12 arranged along the axial direction of the main body rod 102.

[0080] Among them, the second mating section 2 includes a second radial surface 21 adapted to fit with the first radial surface 11 and a second axial surface 22 adapted to fit with the first axial surface 12.

[0081] Specifically, docking is required between the main body part 101 and the end head part 104. There is a docking surface between the two, and after the two are docked, they form an integral body. Therefore, the docking surface on the main body part 101 is called the first mating section 1, and the docking surface on the end head part 104 is called the second mating section 2.

[0082] The first mating section 1 and the second mating section 2 of this embodiment respectively include a radial surface and an axial surface.

[0083] The radial surface refers to a surface opened along the radial direction and perpendicular to the axial direction, and the axial surface refers to a surface opened along the axial direction and parallel to the axial direction. The axial surface can be a plane or a cylindrical surface, and the generatrix of the cylindrical surface is parallel to the axial direction.

[0084] The first radial surface 11 is a surface opened along the radial direction of the main body rod 102, and the first axial surface 12 is a surface opened along the axial direction of the main body rod 102. The second radial surface 21 is a surface opened along the radial direction of the end head rod 105, and the second axial surface 22 is a surface opened along the axial direction of the end head rod 105. After the main body rod 102 and the end head rod 105 are docked, the first radial surface 11 and the second radial surface 21 are fitted, and the first axial surface 12 and the second axial surface 22 are fitted.

[0085] The outer surface of the plug connector 114 and the inner surface of the plug hole 115 do not belong to the above-mentioned first mating section 1 and second mating section 2. It can be understood that the first radial surface 11 or the first axial surface 12 is connected to the outer surface of the plug connector 114, and the second radial surface 21 or the second axial surface 22 is connected to the inner surface of the plug hole 115. The plug connector 114 and the plug hole 115 are coaxial with the integral rod 107. The outer diameter of the plug connector 114 is smaller than the rod diameter of the main body rod 102, and the inner diameter of the plug hole 115 is smaller than the rod diameter of the end head rod 105.

[0086] The effect of this embodiment is that since there are both radial surfaces and axial surfaces for docking between the main body part 101 and the end head part 104, when the main body part 101 drives the end head part 104 to rotate, the axial surface can be relied on to transmit the rotational force, making the transmission between the two more stable. At the same time, the radial surface is relied on to achieve radial limit, strengthening the stability of the connection and the consistency of rotation between the two.

[0087] In some embodiments, please refer to Figure 3 , the first axial surface 12 at least includes a first thread ridge cross-section 13 located at the end of the first thread ridge 103, and the second axial surface 22 at least includes a second thread ridge cross-section 23 located at the end of the second thread ridge 106 that fits with the first thread ridge cross-section 13. Both the first thread ridge cross-section 13 and the second thread ridge cross-section 23 are axial surfaces.

[0088] The first thread ridge 103 is provided on the main body rod 102, and it has a cross-section at its end, that is, the first thread ridge cross-section 13, which is used to dock with the second thread ridge cross-section 23 of the second thread ridge 106 located on the end head rod 105, thereby forming an integral feeding thread ridge 108.

[0089] In some embodiments, the first thread ridge cross-section 13 and the second thread ridge cross-section 23 transmit the rotational force by contacting each other.

[0090] The effect of this embodiment is that the axial cross-section is conducive to the transmission of the rotational force. The first thread ridge cross-section 13 and the second thread ridge cross-section 23 have a relatively large width axially, and the two are in face-to-face contact, which is conducive to transmitting the acting force in the circumferential direction, and further realizing the axial rotation of the main body part 101 and the end head part 104 with a lower driving force. Moreover, the axial thread ridge cross-section is easy to process and has a stable structure.

[0091] In some embodiments, please refer to Figure 3 , the first axial surface 12 includes a main body rod axial cross-section 14 of the main body rod 102, and the first radial surface 11 includes a main body rod radial cross-section 15 of the main body rod 102; The second axial surface 22 includes a end head rod axial cross-section 24 of the end head rod 105 that fits with the main body rod axial cross-section 14; the second radial surface 21 includes a end head rod radial cross-section 25 of the end head rod 105 that fits with the main body rod radial cross-section 15.

[0092] Specifically, in addition to including the first thread ridge cross-section 13 and the second thread ridge cross-section 23, the first axial surface 12 and the second axial surface 22 also include the main body rod axial cross-section 14 and the end head rod axial cross-section 24 respectively; while the first radial surface 11 and the second radial surface 21 include the main body rod radial cross-section 15 and the end head rod radial cross-section 25.

[0093] In this embodiment, when the main body rod 102 and the end head rod 105 are docked with each other, in addition to being inserted through the insertion joint 114 and the insertion hole 115, they are also docked through the surfaces in the above-mentioned radial and axial directions, which is beneficial to the transmission of force and the stability of movement and structure.

[0094] In some embodiments, please refer to Figure 3 , the axial section 14 of the main body rod is respectively connected to the radial section 15 of the main body rod at both ends in the axial direction of the main body rod 102 and forms a stepped section, and a shape adapted to and fitting with the stepped section is formed between the axial section 24 of the end head rod and the radial section 25 of the end head rod.

[0095] A stepped section is formed between the axial section 14 of the main body rod and the radial section 15 of the main body rod, and a matching stepped section is also formed between the axial section 24 of the end head rod and the radial section 25 of the end head rod, and the two stepped sections are adapted to and fit with each other.

[0096] Specifically, the axial section 14 of the main body rod is respectively connected to a radial section 15 of the main body rod at both ends along the axial direction of the main body rod 102, so as to form a stepped section, and the corresponding axial section 24 of the end head rod is respectively connected to a radial section 25 of the end head rod at both ends along the axial direction of the end head rod 105. When the first mating section 1 and the second mating section 2 are docked, the axial section 14 of the main body rod and the axial section 24 of the end head rod, which are both axial surfaces, are in contact, on the one hand, strengthening the connection stability between the first mating section 1 and the second mating section 2, and on the other hand, contributing to the rotation of the main body rod 102 and the end head rod 105. The radial section 15 of the main body rod and the radial section 25 of the end head rod, which are both radial surfaces, are in contact, contributing to the connection stability and reliability of the main body rod 102 and the end head rod 105.

[0097] The effect of this embodiment is that the stepped section has better docking accuracy during docking.

[0098] In some embodiments, the fitting gap between the first mating section 1 and the second mating section 2 is less than or equal to 0.5 mm, and a sealing gasket is provided between the first mating section 1 and the second mating section 2. The fitting gap refers to the gap that may be caused by the machining error of the structural surface after the two mating sections are in contact.

[0099] The fitting gap between the first mating section 1 and the second mating section 2 is less than or equal to 0.5 mm, making the formed integral rod 107 and the pushing screw rib 108 have better flatness and continuity, and the integral effect is better. At the same time, in order not to allow materials to remain in the gap, this embodiment also provides a sealing gasket. The sealing gasket can be a rubber gasket, etc. It is arranged between the mating sections to fill the gap and reduce the possibility of materials being clamped in the gap.

[0100] In some embodiments, please refer to Figure 3 and Figure 4, a key connection is adopted between the plug joint 114 and the inner wall of the socket hole 115 to prevent relative rotation between the two.

[0101] The key connection can be a spline or a flat key. The two can also be inserted and matched through a special-shaped mating surface to prevent relative rotation.

[0102] If a spline connection is adopted, external splines can be provided on the outer wall of the plug joint 114, and internal splines can be provided on the inner wall of the socket hole 115 for assembly.

[0103] In some embodiments, please refer to Figure 3 and Figure 4 , a locking block 3 is provided in the socket hole 115. The plug joint 114 is inserted into the socket hole 115 and connected to the locking block 3. The locking block 3 is used for axially limiting the end rod 105 to prevent the end rod 105 from axially disengaging from the plug joint 114.

[0104] This embodiment prevents the plug joint 114 from axially separating from the socket hole 115.

[0105] Optionally, the locking block 3 is a block structure, and its cross-section is adapted to the cross-section of the socket hole 115 and can slide into the socket hole 115. The plug joint 114 is inserted into the socket hole 115 from one end of the socket hole 115, while the locking block 3 is inserted into the socket hole 115 from the other end of the socket hole 115. The locking block 3 will encounter a limiting structure protruding from the hole wall of the socket hole 115 during the insertion process. Specifically, it can be the end of the spline on the inner wall of the socket hole 115. Then the locking block 3 is stuck and relatively fixed to the inner wall of the socket hole 115. At this time, the locking block 3 is further locked and connected to the plug joint 114, so as to prevent the end rod 105 from relatively moving axially relative to the plug joint 114, realizing the relative fixation between the end rod 105 and the main rod 102 in the axial direction.

[0106] In some embodiments, please refer to Figure 3 and Figure 4 , the locking block 3 is provided with a through hole, and the plug joint 114 is provided with a threaded hole 5 opposite to the through hole. The through hole is used for passing a suitable bolt 4, and the threaded section of the bolt 4 is threadedly connected in the threaded hole 5 to lock and fix the locking block 3 relative to the plug joint 114.

[0107] This embodiment provides a connection method between the locking block 3 and the plug joint 114. The through hole is a hole opened on the locking block 3 and penetrating through both ends of the locking block 3. After passing through the bolt 4, the passing end of the bolt 4 is threadedly connected in the threaded hole 5. By screwing the bolt 4, the locking block 3 can be relatively locked with the plug joint 114.

[0108] The connection method of this embodiment is simple and convenient. By tightening or loosening the bolt 4, the connection and disassembly between the locking block 3 and the socket 114 can be achieved. After disassembly, the end rod 105 can be separated from the socket 114, facilitating the operation of replacing the end head 104.

[0109] In some embodiments, the through hole is a counterbore.

[0110] The counterbore includes a larger hole and a smaller hole coaxially connected. The nut of the bolt 4 is located in the larger hole, and the threaded rod is located in the smaller hole and passes through the smaller hole. The nut is located in the larger hole and cannot enter the smaller hole, which is beneficial for limiting the axial movement of the bolt 4.

[0111] In some embodiments, the locking block 3 is also welded to the inner wall of the socket hole 115.

[0112] In some cases, when the locking block 3 is locked with the socket 114, in order to further increase the firmness of the locking block 3, spot welding can be performed between the locking block 3 and the inner wall of the socket hole 115, and the welding spot can be removed with the help of tools during disassembly.

[0113] In some embodiments, please refer to Figure 3 and Figure 4 , a end 6 made of polymer material is assembled at one end of the end rod 105 away from the main rod 102. The end 6 is assembled in the socket hole 115, and the exposed surface of the end 6 outside the socket hole 115 and the surface of the end rod 105 are smoothly transitioned.

[0114] Specifically, one end of the socket hole 115 is inserted into the socket 114, and the other end is provided with the end 6 for covering the socket hole 115. The position where the end 6 is located is the outermost end of the feeding screw 10, which contacts a large amount of materials. Therefore, it is made of polymer material and has high wear resistance. The end 6 has an exposed part outside the socket hole 115, and the exposed part contacts the materials. The smooth transition between the exposed surface and the surface of the end rod 105 means that there is no step-like structure of height at the connection position between the two surfaces, but a whole smooth surface is formed.

[0115] The effect of this embodiment is that the end 6 has high wear resistance, realizes the plugging of the socket hole 115, and the exposed part and the surface of the end rod 105 are smoothly transitioned, which can avoid material accumulation at the head. In addition, the outermost end of the feeding screw 10 is the position most prone to corrosion and wear, and the end 6 is a separate and separable independent component, which can be replaced at any time.

[0116] In some embodiments, please refer to Figure 3 and Figure 4, the end 6 is in interference fit with the inner wall of the insertion hole 115. A protrusion 7 is provided on one side of the end 6 located inside the insertion hole 115. The locking block 3 is provided with a receiving portion for receiving the protrusion 7 and having a shape adapted to the protrusion 7.

[0117] During the process of inserting the end 6 into the insertion hole 115, there is an interference fit with the inner wall, which strengthens the firmness of the fixation of the end 6 and is relatively convenient to disassemble. At the same time, in order to prevent the end 6 from rotating, the protrusion 7 is provided. When the end 6 is inserted, the protrusion 7 enters the receiving portion of the locking block 3, which can prevent the end 6 from rotating. The cross-section of the protrusion 7 can be rectangular. The receiving portion can be the larger hole of the counterbore on the above-mentioned locking block 3.

[0118] In some embodiments, the material of the end 6 includes one or more of polytetrafluoroethylene, polyethylene, and polyetheretherketone.

[0119] This embodiment provides a variety of materials that the end 6 can adopt, which can be adaptively selected according to needs. These materials all have good wear resistance, and the polyethylene is ultra-high molecular weight polyethylene.

[0120] In some embodiments, the material of the end head 104 is alloy steel with nitriding treatment on the surface and a coating deposited, and the surface roughness Ra of the end head 104 is less than 0.1 μm.

[0121] When the end head 104 is damaged, the end head 104 can be replaced. In order to reduce the frequency of replacement and save time costs, in this embodiment, the end head 104 is made of wear-resistant alloy steel, which can be nitriding steel, and the surface is subjected to nitriding treatment and an industrial coating is deposited on the surface to reduce the roughness to less than 0.1 μm, thereby reducing the material adhesion on the surface of the end head 104.

[0122] In some embodiments, the coating includes one or more of tungsten carbide, titanium nitride, alumina ceramic, polytetrafluoroethylene, and diamond-like carbon.

[0123] The coating materials of this embodiment can all reduce the surface roughness and can be adaptively selected according to needs.

[0124] In some embodiments, please refer to Figure 4 , a diversion channel 8 is opened inside the main body rod 102, and the diversion channel 8 is used for circulating a cooling medium.

[0125] The diversion channel 8 is a flow channel opened inside the main body rod 102 for circulating a cooling medium. The cooling medium can circulate inside the diversion channel 8 to reduce the temperature of the main body rod 102 during operation.

[0126] Please refer to Figure 1, this application also provides a feeder 100, including the feeding screw 10 provided in any of the embodiments. The end of the feeding screw 10 is connected to a power assembly, which can be a motor, to drive the feeding screw 10 to rotate, so as to realize material stirring and feeding.

[0127] In some embodiments, the feeding screw 10 of the feeder 100 has one, two or more, optionally two. The two feeding screws 10 can be axially parallel, and the two end heads 104 are located on the same side. The two main rods 102 can be connected to the same set of power assemblies.

[0128] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be covered by the scope of the claims and the description of the present application. In particular, as long as there is no structural conflict, the technical features mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. A feeding screw, characterized in that, Comprising: A main body portion, the main body portion including a main body rod and a first thread rib provided on the main body rod; And A head portion, the head portion including a head rod and a second thread rib provided on the head rod, the head rod being detachably connected to the first end of the main body rod to form an integral rod, and after connection, the first thread rib and the second thread rib are joined to form a continuous material pushing thread rib. The second end of the main body rod is used to connect a power assembly, and the direction from the second end to the first end is the material conveying direction; the material pushing thread rib has a material pushing surface, and the material pushing surface intersects any axial section of the integral rod to form a plurality of arcs arranged at intervals along the axial direction of the integral rod. The arc includes a first arc line that is concave inward.

2. The feeding screw according to claim 1, characterized in that, The arc radius corresponding to the first arc line is 100 mm to 350 mm.

3. The feeding screw according to claim 1, wherein The surface of the integral rod intersects the axial section to form a surface line, and the arc further includes a second arc line that is concave inward. The two ends of the second arc line are respectively connected to the first arc line and the surface line.

4. The feeding screw according to claim 3, wherein, The arc radius corresponding to the second arc line is greater than 20 mm.

5. The feeding screw according to any one of claims 1-4, characterized in that The first end of the main body rod is provided with a plug connector, and the head rod is provided with a plug hole. The plug connector is used to insert into the plug hole so that the head rod is connected to the main body rod. The length of the plug connector in the axial direction of the plug hole is less than the length of the plug hole in the axial direction of the plug hole.

6. The feeding screw according to claim 5, wherein The main body portion has a first mating section, and the head portion has a second mating section. After the plug connector is inserted into the plug hole, the first mating section and the second mating section are adapted and fitted to each other; Wherein, the first mating section includes a first radial surface arranged along the radial direction of the main body rod and a first axial surface arranged along the axial direction of the main body rod; The second mating section includes a second radial surface adapted and fitted to the first radial surface and a second axial surface adapted and fitted to the first axial surface.

7. The feeding screw according to claim 6, wherein The first axial surface at least includes a first thread rib section located at the end of the first thread rib, and the second axial surface at least includes a second thread rib section located at the end of the second thread rib and fitted to the first thread rib section.

8. The feeding screw according to claim 7, characterized in that, The first thread rib section and the second thread rib section transmit rotational force by contacting each other.

9. The feeding screw according to claim 6, wherein The first axial surface includes a main body rod axial section of the main body rod, and the first radial surface includes a main body rod radial section of the main body rod; The second axial surface includes a head rod axial section of the head rod that is fitted to the main body rod axial section; the second radial surface includes a head rod radial section of the head rod that is fitted to the main body rod radial section.

10. The feeding screw according to claim 9, characterized in that, The two ends of the main body rod axial section in the axial direction of the main body rod are respectively connected to the main body rod radial section and form a stepped section, and a shape adapted and fitted to the stepped section is formed between the head rod axial section and the head rod radial section.

11. The feeding screw according to claim 6, wherein, The fitting clearance between the first fitting section and the second fitting section is less than or equal to 0.5 mm, and a sealing gasket is provided between the first fitting section and the second fitting section.

12. The feeding screw according to claim 5, characterized in that, The plug connector and the inner wall of the socket hole are anti-rotationally connected in a form of key connection.

13. The feeding screw according to claim 5, characterized in that, A locking block is provided in the socket hole. The plug connector is inserted into the socket hole and connected to the locking block. The locking block is used for axially limiting the end rod to prevent the end rod from axially disengaging from the plug connector.

14. The feeding screw according to claim 13, wherein, The locking block is provided with a through hole, and the plug connector is provided with a threaded hole opposite to the through hole. The through hole is used for passing through a fitting bolt, and the threaded section of the bolt is threadedly connected in the threaded hole to lock and fix the locking block relative to the plug connector.

15. The feeding screw according to claim 14, characterized in that, The through hole is a counterbore.

16. The feeding screw according to claim 14, characterized in that, The locking block is also welded to the inner wall of the socket hole.

17. The feeding screw according to claim 13, characterized in that, One end of the end rod away from the main body rod is assembled with an end made of a polymer material. The end is assembled in the socket hole, and the exposed surface of the end outside the socket hole is smoothly transitioned with the surface of the end rod.

18. The feeding screw according to claim 17, characterized in that, The end is in interference fit with the inner wall of the socket hole. A protrusion is provided on one side of the end located in the socket hole, and the locking block is provided with a receiving portion for receiving the protrusion and having a shape adapted to the protrusion.

19. The feeding screw according to claim 17, characterized in that, The material of the end includes one or more of polytetrafluoroethylene, polyethylene, and polyetheretherketone.

20. The feeding screw according to any one of claims 1-4, characterized in that, The material of the end head is alloy steel with nitriding treatment on the surface and a coating. The surface roughness Ra of the end head is less than 0.1 μm.

21. The feeding screw according to claim 20, characterized in that, The coating includes one or more of tungsten carbide, titanium nitride, alumina ceramic, polytetrafluoroethylene, and diamond-like carbon.

22. The feeding screw according to any one of claims 1-4, characterized in that, A diversion channel is opened inside the main body rod. The diversion channel is used for circulating a cooling medium.

23. A feeder, characterized in that, Including the feeding screw according to any one of claims 1-22.

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