Feed screw and feeder

Abstract

The present application belongs to the field of battery preparation technology and provides a feeding screw and a feeding machine. The feeding screw includes a main body and an end portion. The main body includes a main rod and a first screw flight provided on the main rod. The end portion includes a terminal rod and a second screw flight provided on the terminal rod. The terminal rod is detachably connected to the first end of the main rod to form an integral rod. After connection, the first and second screw flights are connected to form a continuous pusher flight. The second end of the main rod is used to connect to a power assembly, and the direction in which the second end points to the first end is the material conveying direction. The pusher flight has a pusher surface, which intersects with any axial cross section of the integral rod to form a plurality of arcs spaced along the axial direction of the integral rod. The arcs include a concave first circular arc. The purpose is to reduce the effects of the rough surface of the feeding screw end on the slurry in the feeder, such as the residence time, adhesion, and increased drying degree, thereby reducing the quality impact on the slurry.

Description

Technical Field

[0001] The present application belongs to the field of battery preparation technology, and in particular relates to a feeding screw and a feeding machine. Background Art

[0002] With the rise of new energy devices, represented by new energy vehicles, battery devices have become a key power source. Battery devices include battery cells, which are the main components for charging and discharging. Battery cells contain electrode assemblies, which include positive and negative electrode sheets and separators. The production and preparation of electrode sheets in electrode assemblies involves coating processes, such as applying slurry to the surface of the current collector. The slurry is fed through the feed screw in the feeder. The feeder's discharge port is small, and the discharge speed is lower than the feed speed. Therefore, the slurry accumulates at the discharge port of the feeder, which is the end of the feed screw.

[0003] During long-term use, the end of the feeding screw will be damaged, making the surface of the end of the feeding screw rough, aggravating the adhesion of the slurry at the end of the feeding screw and the retention time of the slurry at the end, making the slurry dry out more aggravated, and aggravating the impact on the slurry quality. Summary of the Invention

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

[0005] To solve the above problems, in a first aspect, the present application provides a feeding screw, comprising:

[0006] a main body portion, the main body portion comprising a main body rod and a first screw flight provided on the main body rod; and

[0007] The end portion includes an end rod and a second screw ridge provided on the end rod, the end rod is detachably connected to the first end of the main rod to form an integral rod and after connection, the first screw ridge and the second screw ridge are connected to form a continuous pushing screw ridge, the second end of the main rod is used to connect the power component, and the direction in which the second end points to the first end is the material conveying direction; the pushing screw ridge has a pushing surface, and the pushing surface intersects with any axial cross-section of the integral rod to form a plurality of arcs arranged at intervals along the axial direction of the integral rod, and the arc includes an inwardly concave first circular arc.

[0008] 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, thereby avoiding the adhesion and drying of the material, reducing the impact on the quality of the material 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, and without disassembling and reorganizing the connection structure between the feeding screw and the power assembly, and the replacement speed is faster.

[0009] In an embodiment of the first aspect, the arc radius corresponding to the first arc line is 100 mm to 350 mm.

[0010] The effect of this embodiment is that the entire pushing surface forms a large concave arc surface structure. After testing, the pushing surface of the arc surface structure has higher pushing efficiency and faster pushing speed than the traditional trapezoidal screw ribs, which reduces material accumulation.

[0011] In an embodiment of the first aspect, the surface of the integral rod intersects with the axial section to form a surface line, and the arc line further includes a concave second arc line, and two ends of the second arc line respectively connect the first arc line and the surface line.

[0012] In an embodiment of the first aspect, the arc radius corresponding to the second arc line is greater than 20 mm.

[0013] The effect of this embodiment is that the position where the pushing surface meets the surface of the integral rod is transitioned through a rounded corner, that is, through an arc surface transition, avoiding the formation of a folded angle, thereby reducing the possibility of material remaining on the surface of the integral rod and facilitating the rapid transportation of the material.

[0014] In one embodiment of the first aspect, a plug connector is provided at the first end of the main rod, and a plug hole is provided at the end rod. The plug connector is configured to be plugged into the plug hole to connect the end rod to the main rod, and the length of the plug connector in the axial direction of the plug hole is smaller than the length of the plug hole in the axial direction of the plug hole. This has the effect that the length of the plug connector is smaller than the depth of the plug hole, so that the plug connector does not need to be inserted into the entire plug hole to complete the connection, and the end rod does not need to be pulled out a long distance for removal.

[0015] In one embodiment of the first aspect,

[0016] The main body has a first matching cross-section, and the end portion has a second matching cross-section. After the plug connector is inserted into the plug hole, the first matching cross-section and the second matching cross-section fit together.

[0017] Wherein, the first matching cross-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;

[0018] The second matching section includes a second radial surface that fits in with the first radial surface and a second axial surface that fits in with the first axial surface.

[0019] The effect of this embodiment is that since there are both radial surfaces and axial surfaces in the connection between the main body and the end head, the axial surface can be used to transmit the rotational force when the main body drives the end head to rotate, making the transmission effect between the two more stable. At the same time, the radial surface is used to achieve radial limitation, thereby enhancing the stability of the connection between the two and the consistency of rotation.

[0020] In an embodiment of the first aspect, the first axial surface includes at least a first screw flight section located at the end of the first screw flight, and the second axial surface includes at least a second screw flight section located at the end of the second screw flight that is in contact with the first screw flight section.

[0021] In an embodiment of the first aspect, the first screw flight section and the second screw flight section transmit rotational force by contacting each other.

[0022] The advantage of this embodiment is that the axial cross-section facilitates the transmission of rotational force. The first and second screw flight cross-sections have a large axial width, and the face-to-face contact between them facilitates the transmission of force in the circumferential direction, thereby achieving axial rotation of the main body and end portion with a low driving force. Furthermore, the axial screw flight cross-section is easy to machine and has a stable structure.

[0023] In one embodiment of the first aspect,

[0024] 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;

[0025] The second axial surface includes an axial section of the end rod located at the end rod and in contact with the axial section of the main rod; the second radial surface includes a radial section of the end rod located at the end rod and in contact with the radial section of the main rod.

[0026] In this embodiment, the main rod and the end rod are also butted together through surfaces in both radial and axial directions, which is beneficial to the transmission of force and the stability of movement and structure.

[0027] In an embodiment of the first aspect, the axial section of the main rod is connected to the radial section of the main rod at both ends of the axial direction of the main rod to form a stepped section, and a shape that fits the stepped section is formed between the axial section of the end rod and the radial section of the end rod.

[0028] The effect of this embodiment is that the stepped cross section has better docking accuracy during docking.

[0029] In one embodiment of the first aspect, the gap between the first and second mating sections is less than or equal to 0.5 mm, and a sealing gasket is provided between the first and second mating sections. This advantageously results in a gap between the first and second mating sections being less than or equal to 0.5 mm, resulting in a smoother and more continuous overall rod and pusher screw flight, further enhancing the overall integrity. Furthermore, to prevent material from remaining in the gap, this embodiment further provides a sealing gasket, which may be a rubber gasket or the like, disposed between the mating sections to fill the gap and reduce the possibility of material becoming trapped therein.

[0030] In an embodiment of the first aspect, the plug connector and the inner wall of the plug hole are non-rotatably connected via a key connection.

[0031] In one embodiment of the first aspect, a locking block is provided within the insertion hole. The plug connector is inserted into the insertion hole and connected to the locking block. The locking block is used to axially limit the terminal rod to prevent axial separation of the terminal rod and the plug connector. This embodiment prevents the plug connector from axially separating from the insertion hole.

[0032] In an embodiment of the first aspect, 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 to pass an adaptive 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.

[0033] The connection method of this embodiment is simple and convenient to operate. The connection and disassembly between the locking block and the plug connector can be achieved by tightening or loosening the bolts. After disassembly, the end rod can be separated from the plug connector, which facilitates the operation of replacing the end head.

[0034] In one embodiment of the first aspect, the through hole is a countersunk hole. The countersunk hole includes a larger hole and a coaxially connected smaller hole. The nut of the bolt is located in the larger hole, 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, thereby facilitating axial movement limitation of the bolt.

[0035] In an embodiment of the first aspect, the locking block is further welded to the inner wall of the plug hole to further increase the firmness of the locking block.

[0036] In an embodiment of the first aspect, the end of the end rod away from the main rod is equipped with an end made of polymer material, the end head is assembled in the plug hole, and the exposed surface of the end head outside the plug hole smoothly transitions with the surface of the end rod.

[0037] This embodiment provides a highly wear-resistant tip, effectively seals the insertion hole, and provides a smooth transition between the exposed portion and the tip rod surface, preventing material accumulation at the tip. Furthermore, the tip is a separate, detachable component, making it easily replaceable at any time, as the distal end of the feed screw is most susceptible to corrosion and wear.

[0038] In an embodiment of the first aspect, the end head is interference fit with the inner wall of the plug hole, a protrusion is provided on one side of the end head located in the plug hole, and the locking block is provided with an accommodating portion for accommodating the protrusion and adapted to the shape of the protrusion.

[0039] The effect of this embodiment is that the end head is fixed, and the assembly and disassembly are convenient and quick.

[0040] In an embodiment of the first aspect, the terminal head material includes one or more of polytetrafluoroethylene, polyethylene, and polyetheretherketone. This embodiment provides a variety of materials that can be used for the terminal head, which can be selected according to the adaptability required, and these materials all have good wear resistance.

[0041] In one embodiment of the first aspect, the tip portion is made of alloy steel with a nitrided and coated surface, and the surface roughness Ra of the tip portion is less than 0.1 μm. This embodiment improves the wear resistance of the tip portion and reduces material adhesion on the surface of the tip portion.

[0042] In an embodiment of the first aspect, the coating comprises one or more of tungsten carbide, titanium nitride, aluminum oxide ceramics, polytetrafluoroethylene, and diamond-like carbon. The coating materials of this embodiment can reduce surface roughness and can be selected as needed.

[0043] In one embodiment of the first aspect, a guide channel is defined within the main body rod, the guide channel being configured to circulate a cooling medium. The guide channel is a flow passage defined within the main body rod for circulating a cooling medium, allowing the cooling medium to circulate within the guide channel to reduce the temperature of the main body rod during operation.

[0044] In a second aspect, the present application also provides a feeder comprising the feeding screw provided in any one of the embodiments.

[0045] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0047] Figure 1 A schematic diagram of the structure of a feeder provided in some embodiments of the present application;

[0048] Figure 2 A schematic diagram of the structure of a feeding screw provided in some embodiments of the present application;

[0049] Figure 3 for Figure 2 Schematic diagram of the explosion structure of the feeding screw;

[0050] Figure 4 for Figure 2 Schematic diagram of the cross-sectional structure of the feeding screw along the AA direction;

[0051] Figure 5 for Figure 4 Schematic diagram of the enlarged structure at point A in the middle.

[0052] The accompanying drawings in the specific implementation manner are as follows:

[0053] 100. Feeder;

[0054] 10. Feeding screw; 101. Main body; 102. Main rod; 103. First screw flight; 104. End portion; 105. End rod; 106. Second screw flight; 107. Integral rod; 108. Pushing screw flight; 109. Pushing surface; 110. Arc line; 111. First circular arc line; 112. Surface line; 113. Second circular arc line; 114. Connector; 115. Connector hole;

[0055] 1. First mating section; 11. First radial surface; 12. First axial surface; 13. First screw flight section; 14. Main rod axial section; 15. Main rod radial section;

[0056] 2. Second mating section; 21. Second radial surface; 22. Second axial surface; 23. Second screw flight section; 24. End rod axial section; 25. End rod radial section;

[0057] 3. Locking block; 4. Bolt; 5. Threaded hole; 6. End; 7. Protrusion; 8. Diversion channel; 9. Surface structure. DETAILED DESCRIPTION

[0058] The following embodiments of the technical solution of the present application will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application and are therefore only examples and are not intended to limit the scope of protection of the present application.

[0059] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments 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-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0060] In the description of the embodiments of this application, the technical terms "first" and "second" are used only to distinguish different objects and should not be understood to indicate or imply relative importance or implicitly specify the quantity, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, the meaning of "plurality" is more than two, unless otherwise clearly and specifically defined.

[0061] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0062] In the description of the embodiments of this application, the term "and / or" is simply a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent the following three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0063] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0064] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to 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 the present application.

[0065] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; internal connections between two components or interactions between two components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present application based on specific circumstances.

[0066] Currently, market developments indicate that battery applications are becoming increasingly widespread. They are not only used in energy storage systems such as hydropower, thermal, wind, and solar power plants, but are also widely used in electric vehicles like electric bicycles, electric motorcycles, and electric cars, as well as in military and police equipment and aerospace applications. As battery applications continue to expand, market demand is also growing.

[0067] The battery device is a complete structure, including a box, inside which multiple battery cells are arranged. In some special scenarios, a single battery cell can also be arranged inside the box. When there are multiple battery cells, the battery cells in the same row can be formed into a battery cell assembly.

[0068] A battery cell includes a housing and an electrode assembly disposed within the housing. The electrode assembly includes positive and negative electrode sheets and a separator. The positive electrode sheet includes a positive electrode current collector and a positive electrode slurry coated on the positive electrode current collector, while the negative electrode sheet includes a negative electrode current collector and a negative electrode slurry coated on the negative electrode current collector.

[0069] Therefore, in the manufacturing process, it is necessary to prepare positive electrode slurry and negative electrode slurry, and obtain a slurry that meets the parameter requirements by mixing different materials, adding glue and stirring. In addition, the prepared slurry can be sieved to filter out large particles or sediments in the slurry. After the slurry preparation is completed, the slurry is coated on the surface of the current collector. For example, the positive electrode slurry is extruded or sprayed on the surface of the positive electrode current collector; the negative electrode slurry is extruded or sprayed on the surface of the negative electrode current collector. After the coating is completed, the pole piece is rolled to further compact the coated pole piece, thereby increasing the compaction density of the pole piece. Subsequently, the pole piece can also be cut, sheeted, and other operations for subsequent winding or lamination processes.

[0070] The slurry is generally fed through a feeder. The discharge port of the feeder in the related art is small and the discharge speed is slow, but the feed speed of the feeder is greater than the discharge speed, so the slurry is easily accumulated at the discharge port, that is, at the end part of the feeding screw. If the slurry is accumulated for a long time, it will dry out to a certain extent.

[0071] The end part of the feeding screw will cause wear and corrosion during long-term use, resulting in poor surface finish and a rough surface. This will increase the adhesion of the slurry at the end of the feeding screw and the retention time of the slurry at the end, exacerbating the drying of the slurry and affecting the quality of the slurry.

[0072] In response to the above problems, the present application provides a feeding screw 10, which adopts a removable and replaceable end head 104 so that the surface of the end part of the feeding screw 10 maintains a good smoothness, reduces the adhesion degree and residence time of the slurry, thereby minimizing the degree of drying of the slurry at the end part of the feeding screw 10 and reducing the quality impact of the slurry in the feeder 100.

[0073] See also Figure 2-Figure 4 The feeding screw 10 provided in this application includes a main body 101 and an end portion 104.

[0074] The main body 101 includes a main rod 102 and a first screw ridge 103 provided on the main rod 102; the end portion 104 includes an end rod 105 and a second screw ridge 106 provided on the end rod 105. The end rod 105 is detachably connected to the first end of the main rod 102 to form an integral rod 107. After the connection, the first screw ridge 103 and the second screw ridge 106 are connected to form a continuous pushing screw ridge 108. The second end of the main rod 102 is used to connect the power assembly, and the direction in which the second end points to the first end is the material conveying direction.

[0075] Specifically, the main body 101 and the end portion 104 are respectively part of the feed screw 10. The length of the main body 101 is greater than the length of the end portion 104. The end portion 104 refers to the section near the end of the feed screw 10 in the material conveying direction. The ratio of the length of the end portion 104 to the entire length of the feed screw 10 can be set as needed and can be adaptively selected according to the degree of material accumulation. The material refers to the slurry used to coat the surface of the electrode.

[0076] The main rod 102 and the end rod 105 are the central shafts of the main body 101 and the end section 104, respectively. When the two are connected, they form an integral rod 107. After the integral rod 107 is formed, the axes of the main rod 102 and the end rod 105 coincide with each other, which is the axis of the integral rod 107. The second end of the main rod 102 is connected to a power assembly, such as a motor, and is driven by the power assembly to achieve self-rotation, which in turn drives the end rod 105 to rotate, thereby achieving self-rotation of the integral rod 107.

[0077] 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.

[0078] 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.

[0079] 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.

[0080] 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.

[0081] 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 .

[0082] Specifically, the pusher screw 108 is an integral screw rib extending from one end of the integral rod 107 to the other end, and has two surfaces, and the surface facing the end of the integral rod 107 away from the power assembly is the pusher surface 109. The integral rod 107 formed after the end rod 105 and the main rod 102 are connected has an axis, so any section passing through the axis is an axial section, that is, the axis is completely located on the axial section. The pusher surface 109 forms a plurality of arcs 110 arranged along the axial interval on the axial section, wherein each arc 110 includes a concave first circular arc 111. The pusher screw rib 108 forms a plurality of planar structures 9 arranged along the axial interval on this axial section, and the arc 110 can be regarded as one side of the planar structure 9. The concave arc 110 means that the arc 110 is concave toward the side of the planar structure 9, or is concave toward the side close to the integral rod 107.

[0083] The effect of this embodiment is that the entire pushing surface 109 forms an inward-concave arc surface structure. After testing, the pushing surface 109 with an arc surface structure has higher pushing efficiency and faster pushing speed than the traditional trapezoidal screw fins, which reduces the stacking time of the material and reduces the degree of drying of the material.

[0084] In this embodiment, the pusher screw flight 108 may have a gradually varying or constant pitch along the axial direction of the integral rod 107, and the screw groove depth may also have a gradually varying or constant pitch. The screw pitch can be considered as the axial distance between adjacent arcs 110 in an axial cross section, and the screw groove depth can be considered as the distance from the outer end of the arc 110 away from the integral rod 107 to the integral rod 107 in an axial cross section.

[0085] In some embodiments, the arc radius corresponding to the first arc line 111 is 100 mm to 350 mm.

[0086] Within this arc radius range, it has better pushing efficiency.

[0087] In some embodiments, see Figure 2 、 Figure 4 and Figure 5 The surface of the integral rod 107 intersects with the axial section to form a surface line 112 . The arc line 110 further includes a concave second arc line 113 . The two ends of the second arc line 113 are connected to the first arc line 111 and the surface line 112 , respectively.

[0088] Specifically, on the above-mentioned axial section, the push screw 108 forms a planar structure 9 on the axial section, and the surface of the integral rod 107 forms a linear structure, that is, a surface line 112. The surface of the integral rod 107 forms a linear surface line 112 on the axial section, so the surface line 112 is connected to the arc line 110. In addition to the first circular arc line 111, the arc line 110 also includes a 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.

[0089] The effect of this embodiment is that the connecting position between the pushing surface 109 and the surface of the integral rod 107 is transitioned through a rounded corner, that is, through an arc surface transition, avoiding the formation of a folded angle, thereby reducing the possibility of material remaining on the surface of the integral rod 107 and facilitating the rapid transportation of the material.

[0090] In some embodiments, the arc radius corresponding to the second arc line 113 is greater than 20 mm. In this way, a large arc surface is used for transition, which has a better effect.

[0091] In some embodiments, see Figure 3 and Figure 4 The first end of the main rod 102 is provided with a plug connector 114, and the end 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 rod 105 to the main rod 102. The axial length of the plug connector 114 in the plug hole 115 is smaller than the axial length of the plug hole 115 in the plug hole 115.

[0092] Specifically, the main rod 102 and the end rod 105 are connected by plugging, and after the connection, an integral rod 107 is formed. The plug connector 114 is provided on the end face of the main rod 102, and the plug hole 115 is provided on the end rod 105. The two are plugged into each other and are relatively fixed after plugging.

[0093] The length of the plug connector 114 is less than the depth of the plug hole 115, so that the plug connector 114 does not need to be inserted into the entire plug hole 115 to complete the connection, and the end rod 105 does not need to be pulled out a long distance when disassembling.

[0094] The effect of this embodiment is that since the internal space of the feeder 100 is limited and the end head 104 is close to or located at the discharge port, the disassembly space is limited. Selecting a short pull-out distance makes disassembly and assembly more convenient and quick, thereby improving the replacement efficiency of the end head 104.

[0095] In some embodiments, see Figure 3 The main body 101 has a first mating section 1, and the end portion 104 has a second mating section 2. 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 to fit together;

[0096] The first mating section 1 includes a first radial surface 11 arranged along the radial direction of the main rod 102 and a first axial surface 12 arranged along the axial direction of the main rod 102 .

[0097] The second matching 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 .

[0098] Specifically, the main body 101 and the end portion 104 need to be docked, and there is a docking surface between the two. After the two are docked, they form a whole, so the docking surface on the main body 101 is called the first mating section 1, and the docking surface on the end portion 104 is called the second mating section 2.

[0099] The first mating section 1 and the second mating section 2 of this embodiment include both radial surfaces and axial surfaces.

[0100] The radial surface refers to a surface opened along the radial direction and perpendicular to the axial direction. 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 cylinder, and the generatrix of the cylinder is parallel to the axial direction.

[0101] The first radial surface 11 is a surface extending radially along the main rod 102, and the first axial surface 12 is a surface extending axially along the main rod 102. The second radial surface 21 is a surface extending radially along the end rod 105, and the second axial surface 22 is a surface extending axially along the end rod 105. When the main rod 102 and the end rod 105 are docked, the first radial surface 11 and the second radial surface 21 are aligned, and the first axial surface 12 and the second axial surface 22 are aligned.

[0102] The outer surface of the plug connector 114 and the inner surface of the insertion hole 115 do not constitute the first mating section 1 and the second mating section 2 described above. It can be understood that the first radial surface 11 or the first axial surface 12 connects to the outer surface of the plug connector 114, while the second radial surface 21 or the second axial surface 22 connects to the inner surface of the insertion hole 115. The plug connector 114 and the insertion hole 115 are coaxial with the integral rod 107. The outer diameter of the plug connector 114 is smaller than the diameter of the main rod 102, and the inner diameter of the insertion hole 115 is smaller than the diameter of the end rod 105.

[0103] The effect of this embodiment is that since there are both radial surfaces and axial surfaces connecting the main body 101 and the end head 104, when the main body 101 drives the end head 104 to rotate, the axial surface can be used to transmit the rotational force, making the transmission effect between the two more stable. At the same time, the radial surface is used to achieve radial limitation, thereby enhancing the stability of the connection between the two and the consistency of rotation.

[0104] In some embodiments, see Figure 3 The first axial surface 12 includes at least a first screw flight section 13 at the end of the first screw flight 103, and the second axial surface 22 includes at least a second screw flight section 23 at the end of the second screw flight 106 that is in contact with the first screw flight section 13. Both the first screw flight section 13 and the second screw flight section 23 are axial surfaces.

[0105] The first screw flight 103 is arranged on the main rod 102 and has a section at the end, namely the first screw flight section 13, which is used to dock with the second screw flight section 23 of the second screw flight 106 located on the end rod 105, thereby forming an integral pushing screw flight 108.

[0106] In some embodiments, the first screw flight section 13 and the second screw flight section 23 transmit the rotational force by contacting each other.

[0107] The advantage of this embodiment is that the axial cross section facilitates the transmission of rotational force. The first screw flight section 13 and the second screw flight section 23 have a large axial width. The face-to-face contact between the two facilitates the transmission of force in the circumferential direction, thereby achieving axial rotation of the main body 101 and the end head 104 with a relatively low driving force. Furthermore, the axial screw flight section is easy to machine and has a stable structure.

[0108] In some embodiments, see Figure 3 The first axial surface 12 includes an axial section 14 of the main body rod 102 , and the first radial surface 11 includes a radial section 15 of the main body rod 102 ;

[0109] The second axial surface 22 includes an end rod axial section 24 located at the end rod 105 and aligned with the main rod axial section 14 ; the second radial surface 21 includes an end rod radial section 25 located at the end rod 105 and aligned with the main rod radial section 15 .

[0110] Specifically, in addition to the first screw flight section 13 and the second screw flight section 23, the first axial surface 12 and the second axial surface 22 also include the main rod axial section 14 and the end rod axial section 24 respectively; and the first radial surface 11 and the second radial surface 21 include the main rod radial section 15 and the end rod radial section 25.

[0111] In this embodiment, when the main rod 102 and the end rod 105 are docked with each other, in addition to being connected through the plug connector 114 and the plug hole 115, they are also docked through the above-mentioned radial and axial surfaces, which is beneficial to the transmission of force and the stability of movement and structure.

[0112] In some embodiments, see Figure 3 The main rod axial section 14 is connected to the main rod radial section 15 at both ends of the main rod 102 in the axial direction to form a stepped section, and the end rod axial section 24 and the end rod radial section 25 form a shape that fits the stepped section.

[0113] A stepped section is formed between the main rod axial section 14 and the main rod radial section 15 , and a matching stepped section is also formed between the end rod axial section 24 and the end rod radial section 25 , and the two stepped sections are matched and fit together.

[0114] Specifically, the main rod axial section 14 is connected to a main rod radial section 15 at both ends along the axial direction of the main rod 102, thereby forming a stepped section, and the corresponding end rod axial section 24 is connected to an end rod radial section 25 at both ends along the axial direction of the end rod 105. When the first mating section 1 is docked with the second mating section 2, the main rod axial section 14 and the end rod axial section 24, both of which are axial surfaces, fit together. On the one hand, it strengthens the connection stability between the first mating section 1 and the second mating section 2, and on the other hand, it helps the rotation of the main rod 102 and the end rod 105. The main rod radial section 15 and the end rod radial section 25, both of which are radial surfaces, fit together, which helps the connection stability and reliability of the main rod 102 and the end rod 105.

[0115] The effect of this embodiment is that the stepped cross section has better docking accuracy during docking.

[0116] 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 between the two mating sections after fitting, which may be caused by machining errors of the structural surfaces.

[0117] The fitting gap between the first mating section 1 and the second mating section 2 is less than or equal to 0.5 mm, so that the formed integral rod 107 and the push screw rib 108 have better flatness and continuity, and the integrity effect is better. At the same time, in order to prevent material from remaining in the gap, this embodiment also provides a sealing gasket, which can be a rubber gasket, etc., which is arranged between the mating sections to fill the gap and reduce the possibility of material being trapped in the gap.

[0118] In some embodiments, see Figure 3 and Figure 4 The plug connector 114 and the inner wall of the plug hole 115 are connected by a key to prevent the two from rotating relative to each other.

[0119] The key connection can be a spline or a flat key. The two can also be plugged in through a special-shaped assembly surface to prevent relative rotation.

[0120] If a spline connection is adopted, an external spline can be provided on the outer wall of the plug connector 114 and an internal spline can be provided on the inner wall of the plug hole 115 for assembly.

[0121] In some embodiments, see Figure 3 and Figure 4 A locking block 3 is provided in the plug hole 115, and the plug connector 114 is inserted into the plug hole 115 and connected to the locking block 3. The locking block 3 is used to limit the axial position of the end rod 105 to prevent the end rod 105 from axially disengaging from the plug connector 114.

[0122] The configuration of this embodiment prevents the plug connector 114 from being separated from the plug hole 115 along the axial direction.

[0123] Optionally, the locking block 3 is a block-shaped structure, the cross-section of which is adapted to the cross-section of the plug hole 115 and can slide into the plug hole 115. The plug connector 114 is inserted into the plug hole 115 from one end of the plug hole 115, and the locking block 3 is inserted into the plug hole 115 from the other end of the plug hole 115. During the insertion process, the locking block 3 will encounter a limiting structure protruding from the wall of the plug hole 115, which can specifically be the spline end of the inner wall of the plug hole 115. The locking block 3 is then stuck and relatively fixed to the inner wall of the plug hole 115. At this time, the locking block 3 is locked and connected to the plug connector 114, which can prevent the end rod 105 from axially moving relative to the plug connector 114, thereby realizing the relative fixation of the end rod 105 and the main rod 102 in the axial direction.

[0124] In some embodiments, see Figure 3 and Figure 4 The locking block 3 is provided with a through hole, and the plug connector 114 is provided with a threaded hole 5 opposite to the through hole. The through hole is used to pass an adaptive bolt 4, and the threaded section of the bolt 4 is threadedly connected in the threaded hole 5 to lock the locking block 3 relative to the plug connector 114.

[0125] This embodiment provides a connection method between the locking block 3 and the plug connector 114. The through hole is a hole opened on the locking block 3 and passes through both ends of the locking block 3. After the bolt 4 passes through, the through end of the bolt 4 is threadedly connected to the threaded hole 5. By tightening the bolt 4, the locking block 3 and the plug connector 114 can be relatively locked.

[0126] The connection method of this embodiment is simple and convenient to operate. The connection and disassembly between the locking block 3 and the plug connector 114 can be achieved by tightening or loosening the bolt 4. After disassembly, the end rod 105 can be separated from the plug connector 114, which facilitates the operation of replacing the end head 104.

[0127] In some embodiments, the through-hole is a countersunk hole.

[0128] The countersunk hole includes a larger hole and a smaller hole connected coaxially. The nut of the bolt 4 is located in the larger hole, the threaded rod is located in the smaller hole and passes through the smaller hole, and the nut is located in the larger hole and cannot enter the smaller hole, which is conducive to limiting the axial movement of the bolt 4.

[0129] In some embodiments, the locking block 3 is further welded to the inner wall of the plug hole 115 .

[0130] In some cases, when the locking block 3 is locked with the plug connector 114, in order to further increase the firmness of the locking block 3, the locking block 3 and the inner wall of the plug hole 115 can be spot welded, and the welding spots can be removed with the help of tools during disassembly.

[0131] In some embodiments, see Figure 3 and Figure 4 The end of the end rod 105 away from the main rod 102 is equipped with a terminal 6 made of polymer material. The terminal 6 is assembled in the plug hole 115, and the exposed surface of the terminal 6 outside the plug hole 115 transitions smoothly with the surface of the end rod 105.

[0132] Specifically, one end of the insertion hole 115 is inserted into the plug connector 114, and the other end is provided with a terminal 6 for sealing the insertion hole 115. Terminal 6 is located at the very end of the feed screw 10 and contacts a large amount of material, so it is made of a high-wear-resistant polymer material. Terminal 6 has an exposed portion outside the insertion hole 115, which contacts the material. The exposed portion has an exposed surface. The smooth transition between the exposed surface and the surface of the terminal rod 105 means that the connection between the two surfaces does not have a stepped structure, but forms a smooth, integrated surface.

[0133] This embodiment provides high wear resistance for the tip 6, effectively sealing the insertion hole 115. Furthermore, the exposed portion transitions smoothly with the surface of the tip rod 105, preventing material accumulation at the tip. Furthermore, the distal end of the feed screw 10 is the most susceptible location for corrosion and wear, and the tip 6 is a separate, detachable component that can be readily replaced.

[0134] In some embodiments, see Figure 3 and Figure 4 The end head 6 is interference fit with the inner wall of the plug hole 115 , and a protrusion 7 is provided on one side of the end head 6 located in the plug hole 115 , and a receiving portion for accommodating the protrusion 7 and matching the shape of the protrusion 7 is provided on the locking block 3 .

[0135] During insertion of the terminal 6 into the insertion hole 115, it creates an interference fit with the inner wall, enhancing the secure fixation of the terminal 6 and facilitating removal. Furthermore, to prevent the terminal 6 from rotating, a protrusion 7 is provided. When the terminal 6 is inserted, the protrusion 7 enters the receiving portion of the locking block 3, preventing the terminal 6 from rotating. The cross-section of the protrusion 7 can be rectangular. The receiving portion can be the larger hole of the countersunk hole in the locking block 3 described above.

[0136] In some embodiments, the material of the end cap 6 includes one or more of polytetrafluoroethylene, polyethylene, and polyetheretherketone.

[0137] This embodiment provides a variety of materials that can be used for the end cap 6, which can be selected according to the adaptability required. These materials all have good wear resistance, and the polyethylene is ultra-high molecular weight polyethylene.

[0138] In some embodiments, the end portion 104 is made of alloy steel with a surface nitrided and plated coating, and the surface roughness Ra of the end portion 104 is less than 0.1 μm.

[0139] When the end portion 104 is damaged, the end portion 104 can be replaced. In order to reduce the frequency of replacement and save time and cost, in this embodiment, the end portion 104 is made of wear-resistant alloy steel, which can be nitrided steel, and the surface is nitrided and industrially coated to reduce the roughness to less than 0.1μm, thereby reducing the material adhesion on the surface of the end portion 104.

[0140] In some embodiments, the coating comprises one or more of tungsten carbide, titanium nitride, aluminum oxide ceramic, polytetrafluoroethylene, and diamond-like carbon.

[0141] The coating materials of this embodiment can all reduce surface roughness and can be selected and adapted as needed.

[0142] In some embodiments, see Figure 4 A guide channel 8 is provided inside the main rod 102, and the guide channel 8 is used to circulate the cooling medium.

[0143] The guide channel 8 is a flow channel opened inside the main rod 102 for circulating the cooling medium. The cooling medium can circulate in the guide channel 8 to reduce the temperature of the main rod 102 during operation.

[0144] See also Figure 1 The present application also provides a feeder 100, comprising a feeding screw 10 provided in any embodiment. 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, thereby achieving material mixing and feeding.

[0145] In some embodiments, the feeder 100 has one, two or more feeding screws 10, optionally two, the two feeding screws 10 can be axially parallel, the two end heads 104 are located on the same side, and the two main rods 102 can be connected to the same set of power components.

[0146] 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 aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A feeding screw, characterized in that: include: A main body portion, the main body portion comprising a main rod and a first screw flight provided on the main rod; as well as The end portion includes an end rod and a second screw ridge provided on the end rod, the end rod is detachably connected to the first end of the main rod to form an integral rod and after connection, the first screw ridge and the second screw ridge are connected to form a continuous pushing screw ridge, the second end of the main rod is used to connect the power component, and the direction of the second end pointing to the first end is the material conveying direction; the pushing screw ridge has a pushing surface, and the pushing surface intersects with any axial section of the integral rod to form a plurality of arcs arranged at intervals along the axial direction of the integral rod, and the arc includes a concave first circular arc line; the surface of the integral rod intersects with the axial section to form a surface line, and the arc also includes a concave second circular arc line, and the two ends of the second circular arc line are respectively connected to the first circular arc line and the surface line.

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, characterized in that The arc radius corresponding to the second arc line is greater than 20 mm.

4. The feeding screw according to any one of claims 1 to 3, characterized in that The first end of the main rod is provided with a plug connector, and the end rod is provided with a plug hole. The plug connector is used to plug into the plug hole to connect the end rod to the main rod, and the length of the plug connector in the axial direction of the plug hole is smaller than the length of the plug hole in the axial direction of the plug hole.

5. The feeding screw according to claim 4, characterized in that The main body has a first matching cross-section, and the end portion has a second matching cross-section. After the plug connector is inserted into the plug hole, the first matching cross-section and the second matching cross-section fit together. Wherein, the first matching cross-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 matching section includes a second radial surface that fits in with the first radial surface and a second axial surface that fits in with the first axial surface.

6. The feeding screw according to claim 5, characterized in that The first axial surface at least includes a first screw flight section located at the end of the first screw flight, and the second axial surface at least includes a second screw flight section located at the end of the second screw flight and in contact with the first screw flight section.

7. The feeding screw according to claim 6, characterized in that The first screw flight section and the second screw flight section are in contact with each other to transmit rotational force.

8. The feeding screw according to claim 5, characterized in that 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 rod located at the end rod and in contact with the axial section of the main rod; the second radial surface includes a radial section of the end rod located at the end rod and in contact with the radial section of the main rod.

9. The feeding screw according to claim 8, characterized in that The axial section of the main rod is connected to the radial section of the main rod at both ends of the axial direction of the main rod to form a stepped section, and a shape that fits the stepped section is formed between the axial section of the end rod and the radial section of the end rod.

10. The feeding screw according to claim 5, characterized in that A fitting gap between the first mating section and the second mating section is less than or equal to 0.5 mm, and a sealing gasket is provided between the first mating section and the second mating section.

11. The feeding screw according to claim 4, characterized in that The plug connector and the inner wall of the plug hole are connected to each other in a rotation-proof manner through a key connection.

12. The feeding screw according to claim 4, characterized in that A locking block is provided in the plug hole, the plug connector is inserted into the plug hole and connected to the locking block, and the locking block is used to limit the axial position of the end rod to prevent the end rod from axially separating from the plug connector.

13. The feeding screw according to claim 12, characterized in that 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 to pass an adapted 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.

14. The feeding screw according to claim 13, characterized in that The through hole is a countersunk hole.

15. The feeding screw according to claim 13, wherein: The locking block is also welded to the inner wall of the plug hole.

16. The feeding screw according to claim 12, wherein: The end of the end rod away from the main rod is equipped with an end made of polymer material, the end head is assembled in the plug hole, and the exposed surface of the end head outside the plug hole smoothly transitions to the surface of the end rod.

17. The feeding screw according to claim 16, characterized in that The end head is interference fit with the inner wall of the plug hole, a protrusion is provided on one side of the end head located in the plug hole, and the locking block is provided with an accommodating portion for accommodating the protrusion and adapted to the shape of the protrusion.

18. The feeding screw according to claim 16, wherein: The end head material includes one or more of polytetrafluoroethylene, polyethylene, and polyetheretherketone.

19. The feeding screw according to any one of claims 1 to 3, characterized in that: The end portion is made of alloy steel with a surface nitrided and coated surface, and the surface roughness Ra of the end portion is less than 0.1 μm.

20. The feed screw according to claim 19, wherein: The coating comprises one or more of tungsten carbide, titanium nitride, alumina ceramics, polytetrafluoroethylene, and diamond-like carbon.

21. The feeding screw according to any one of claims 1 to 3, characterized in that A guide channel is provided inside the main body rod, and the guide channel is used for circulating cooling medium.

22. A feeding machine, characterized in that: The feeding screw comprises the feeding screw according to any one of claims 1 to 21.

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