Screw shaft mechanism and screw feeder

Abstract

The utility model relates to a screw shaft mechanism and a screw feeder, the screw shaft mechanism comprises a screw shaft, a plurality of screw jackets and a fixing assembly, the screw jackets sleeve the outer side of the screw shaft, the screw jackets are sequentially arranged in the axial direction of the screw shaft, and screw blades are arranged on the screw jackets; the connecting assembly comprises a first connecting piece and a second connecting piece which are detachably matched, the first connecting piece and the second connecting piece are arranged on the two axial sides of the spiral outer sleeve respectively, and the first connecting piece of the spiral outer sleeve is matched with the second connecting piece of the adjacent spiral outer sleeve. The fixing assembly is used for limiting and fixing the spiral outer sleeves to the spiral shaft. The problems that after spiral shaping, the spiral lead, the spiral direction, the length and the like cannot be adjusted, and a spiral screw cannot be replaced and maintained after being abraded or damaged are solved.

Description

Technical Field

[0001] The present application relates to the technical field of screw feeding equipment, and in particular to a screw shaft mechanism and a screw feeder. Background Art

[0002] With the development of the industry, the function and requirements of spirals in spiral feeding are getting higher and higher. The existing spiral blades are mainly integrated or welded spiral blades. This kind of metal spiral blade is difficult to process and has low precision. The integrated design and processing and manufacturing make the spiral less adaptable and difficult to assemble. After the spiral is finalized, the spiral lead, rotation direction, length, etc. cannot be adjusted. When the spiral blade is partially damaged, the entire spiral will be scrapped and cannot be used, and the material cannot be recycled. Utility Model Content

[0003] The present application provides a screw shaft mechanism and a screw feeder to solve the problem that the screw lead, rotation direction, length, etc. cannot be adjusted after the screw is finalized.

[0004] In a first aspect, the present application provides a screw shaft mechanism, comprising:

[0005] Helical shaft;

[0006] A plurality of spiral sleeves are sleeved on the outer side of the spiral shaft, each of the spiral sleeves is sequentially arranged along the axial direction of the spiral shaft, and the spiral sleeves are provided with spiral blades;

[0007] A connecting assembly, comprising a first connecting member and a second connecting member that can be detachably matched, the first connecting member and the second connecting member are respectively arranged on both axial sides of the spiral sleeve, and the first connecting member of the spiral sleeve is matched with the second connecting member of the adjacent spiral sleeve; and

[0008] The fixing assembly is used to fix each of the spiral sleeves on the spiral shaft in a limited position.

[0009] In a possible implementation, one of the first connecting member and the second connecting member is a stopper, and the other is an interface embedded and matched with the stopper.

[0010] In a possible implementation, the spiral shaft and the spiral sleeve are transmission connected via a connecting key.

[0011] In a possible implementation, a keyway is provided on one of the spiral shaft and the spiral sleeve, and the other is provided with the connecting key that fits in the keyway.

[0012] In a possible implementation, the spiral shaft forms a first transmission plane along its own axial direction, and the inner wall of the spiral sleeve forms a second transmission plane that fits with the first transmission plane, and the first transmission plane and the second transmission plane form a key transmission.

[0013] In a possible implementation manner, a sealing member is provided between the first connecting member and the second connecting member.

[0014] In a possible implementation, the fixing assembly includes a fixing block, which is disposed at an end of the spiral shaft and abuts against the adjacent spiral sleeve, and the fixing block is detachably matched with the spiral shaft via a locking member.

[0015] In a possible implementation, the spiral outer sleeve is made of non-metallic material, and a first wear-resistant part is provided on the outer surface of the spiral outer sleeve.

[0016] In a second aspect, the present application provides a screw feeder, comprising a silo and a screw shaft mechanism as described in the first aspect, wherein the screw shaft mechanism is used to transport the material in the silo.

[0017] In a possible implementation manner, a second wear-resistant part is provided on the wall surface of the silo.

[0018] The above technical solution provided by the embodiment of the present application has the following advantages compared with the prior art:

[0019] The spiral shaft mechanism and spiral feeder provided in this embodiment are arranged in sequence along the axial direction of the spiral shaft with adjacent spiral jackets, so as to form continuous spiral blades on the spiral shaft. Two adjacent spiral jackets are connected by a connecting assembly, and each spiral jacket is fixed on the spiral shaft by a fixing assembly, so that when the spiral shaft rotates, the spiral blades are driven to rotate synchronously to achieve the effect of spiral conveying. When it is necessary to adjust the spiral lead, rotation direction or length, etc., it is only necessary to replace the spiral jacket of the spiral blade of different models; and when the spiral blade is partially damaged, it is only necessary to replace the corresponding spiral jacket, which solves the problem that the spiral screw cannot be replaced and maintained after wear or damage, increases the diversity of spiral blade combinations, reduces the difficulty of maintaining spiral blades, and makes the spiral shaft mechanism highly adaptable and easy to assemble. After the spiral is finalized, the spiral lead, rotation direction, length, etc. can also be adaptively adjusted. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0021] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0022] One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0023] Figure 1 A schematic diagram of the overall structure of a screw shaft mechanism provided in an embodiment of the present application.

[0024] Figure 2 for Figure 1 Cross-sectional view along the AA direction.

[0025] Figure 3 for Figure 2 Enlarged view of part B in the middle.

[0026] Figure 4 for Figure 2 Enlarged view of part C in the middle.

[0027] Figure 5 for Figure 1 Cross-sectional view along the DD direction.

[0028] Figure 6 A three-dimensional diagram of a spiral sleeve in a spiral shaft mechanism provided in an embodiment of the present application.

[0029] Figure 7 A schematic structural diagram of a spiral sleeve in a spiral shaft mechanism provided in an embodiment of the present application.

[0030] Figure 8 A schematic cross-sectional view of a spiral sleeve in a spiral shaft mechanism provided in an embodiment of the present application.

[0031] Description of reference numerals:

[0032] 1. Screw shaft; 2. Screw sleeve; 3. Screw blade; 4. First connecting piece; 5. Second connecting piece; 6. First transmission plane; 7. Second transmission plane; 8. Sealing piece; 9. Bottom spacer; 10. Fixed core bottom sleeve; 11. Stopper; 12. Locking piece. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0034] The disclosure below provides many different embodiments or examples to realize the different structures of the present application. In order to simplify the disclosure of the present application, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present application. In addition, the present application can repeat reference numbers and / or letters in different examples. This repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed.

[0035] For ease of description, spatial relative terms may be used herein to describe the relative positional relationship or movement of one element or feature relative to another element or feature as shown in the figure, such as "inside", "outside", "inner side", "outer side", "below", "below", "above", "above", "front", "back", etc. Such spatial relative terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figure. For example, if the device in the figure undergoes a position flip or a posture change or a motion state change, then these directional indications also change accordingly, for example: an element described as "below other elements or features" or "below other elements or features" will subsequently be oriented as "above other elements or features" or "above other elements or features". Therefore, the example term "below..." may include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions) and the spatial relative descriptors used herein are interpreted accordingly.

[0036] Reference Figure 1-Figure 8 , the embodiment of the present application provides a screw shaft 1 mechanism, including:

[0037] Helical axis 1;

[0038] A plurality of spiral sleeves 2 are sleeved on the outer side of the spiral shaft 1, and each of the spiral sleeves 2 is sequentially arranged along the axial direction of the spiral shaft 1, and a spiral blade 3 is arranged on the spiral sleeve 2;

[0039] A connecting assembly, comprising a first connecting member 4 and a second connecting member 5 that can be detachably matched, wherein the first connecting member 4 and the second connecting member 5 are respectively provided on both axial sides of the spiral sleeve 2, and the first connecting member 4 of the spiral sleeve 2 is matched with the second connecting member 5 of the adjacent spiral sleeve 2; and

[0040] The fixing assembly is used to fix each of the spiral sleeves 2 on the spiral shaft 1 in a limited position.

[0041] Adjacent spiral sleeves 2 are arranged in sequence along the axial direction of the spiral shaft 1, so that continuous spiral blades 3 are formed on the spiral shaft 1. Two adjacent spiral sleeves 2 are connected by a connecting component, and each spiral sleeve 2 is limited and fixed on the spiral shaft 1 by a fixing component, so that when the spiral shaft 1 rotates, the spiral blades 3 are driven to rotate synchronously to achieve the effect of spiral conveying. When it is necessary to adjust the spiral lead, rotation direction or length, etc., it is only necessary to replace the spiral sleeve 2 of different models of spiral blades 3, and various combinations of different leads, spiral numbers, and spiral rotation directions can be achieved; and when the spiral blade 3 is partially damaged, it is only necessary to replace the corresponding spiral sleeve 2, which solves the problem that the spiral screw cannot be replaced and maintained after wear or damage, increases the diversity of the combination of spiral blades 3, reduces the maintenance difficulty of spiral blades 3, and makes the spiral shaft 1 mechanism highly adaptable and easy to assemble. After the spiral is finalized, the spiral lead, rotation direction, length, etc. can also be adaptively adjusted.

[0042] The detachable cooperation between the first connector 4 and the second connector 5 includes but is not limited to the cooperation between the groove and the protrusion, the cooperation between the positioning pin and the positioning hole, or the cooperation through the buckle and the slot. In the present application, one of the first connector 4 and the second connector 5 is a stopper, and the other is an interface that is embedded and matched with the stopper. The stopper is embedded in the interface along the axial direction of the rotating shaft, so as to achieve the cooperation of the adjacent spiral sleeves 2, and the stopper positioning form is adopted, which is convenient for installation. Of course, the cooperation between the stopper and the interface can also adopt the form of a falcon joint interface, which can realize multi-section docking. The docking can effectively prevent dust penetration, facilitate expansion, and realize flexible design.

[0043] In addition, the connection between the spiral shaft 1 and the spiral outer sleeve 2 can also be realized by any method to realize synchronous rotation. Optionally, the spiral shaft 1 and the spiral outer sleeve 2 are connected by a connecting key transmission. A keyway is provided on one of the spiral shaft 1 and the spiral outer sleeve 2, and the connecting key that is embedded and matched with the keyway is provided on the other; by embedding the connecting key in the keyway, when the spiral shaft 1 rotates, the spiral outer sleeve 2 can be driven to rotate synchronously to realize transmission matching, and a multi-directional keyway is used to realize multi-directional transmission and load distribution.

[0044] Reference Figure 1-Figure 8Of course, the spiral shaft 1 is formed with a first transmission plane 6 along its own axial direction, and the inner wall of the spiral sleeve 2 is formed with a second transmission plane 7 that fits with the first transmission plane 6, and the first transmission plane 6 and the second transmission plane 7 form a key transmission; the cross-section of the outer wall of the spiral shaft 1 is circular as a whole, and the corresponding cross-section of the inner wall of the spiral sleeve 2 is circular as a whole. On this basis, the first transmission plane 6 and the second transmission plane 7 are relatively positioned and fit together, thereby ensuring that the spiral sleeve 2 will be driven to rotate synchronously when the spiral shaft 1 rotates, so as to ensure the reliability of the transmission.

[0045] A seal 8 is provided between the first connector 4 and the second connector 5, and the seal 8 is provided to improve the sealing between the spiral shaft 1 and the spiral sleeve 2 to ensure the sealing effect. The seal 8 can be any component that can achieve a sealing effect, such as a rubber ring or a sealing pad. In the present application, the spiral sleeves 2 are connected by stoppers, and a foamed silicone sealing pad is installed between the interfaces to ensure the sealing effect.

[0046] The fixing assembly includes a fixing block, which is arranged at the end of the spiral shaft 1 and abuts against the adjacent spiral sleeve 2. The fixing block is detachably matched with the spiral shaft 1 through a locking member 12. The fixing block is arranged to squeeze each spiral sleeve 2 along the axial direction of the spiral shaft 1, thereby ensuring the connection and sealing effect. The locking member 12 includes a screw, a bolt, a positioning pin, etc. Of course, in order to ensure the connection effect, two or more locking members 12 can be used.

[0047] Reference Figure 1-Figure 8 In addition, the fixing component can also adopt other structures to achieve the limited fixation of the spiral sleeve 2 on the spiral shaft 1. Exemplarily, the fixing component includes a bottom spacer 9, which is in abutment with the adjacent spiral sleeve 2 along the axial direction of the spiral shaft 1. A fixed core sleeve 10 is provided on the side of the bottom spacer 9 away from the spiral sleeve 2. A mounting hole is provided at the end of the spiral shaft 1. When installing the fixed core sleeve 10, the opening needs to be compressed and pressed into the mounting hole. After being pressed in, the opening pops open to cause friction with the wall of the mounting hole to ensure that each spiral sleeve 2 will not slip off. A stopper 11 is provided in the bottom spacer 9, and a locking member 12 is used to fix it, to ensure that the opening of the fixed core sleeve 10 is squeezed by force and interferes with it, and completely prevents the loosening and falling of each component. In order to ensure the sealing performance, a sealing member 8 can also be provided between the bottom spacer 9 and the adjacent spiral sleeve 2.

[0048] The outer surface of the spiral jacket 2 is provided with a first wear-resistant part; the wear resistance of the spiral jacket 2 is improved by the provision of the first wear-resistant part, and the risk of magnetic foreign matter generated by the friction between the metal spiral blade 3 and the material is reduced. Of course, the first wear-resistant part can also be a plastic wear-resistant part, which effectively eliminates the risk of magnetic foreign matter generated by the friction between the metal spiral blade 3 and the material. The wear-resistant part can be any wear-resistant component or coating, such as spray-coated wear-resistant hard alloy. Preferably, the first wear-resistant part is polyurethane. Compared with spraying wear-resistant hard alloy on the surface, in actual use, there are phenomena such as wear and fall of the metal surface or coating, which introduces magnetic foreign matter into the material and affects the quality of the material. Polyurethane can avoid the generation of foreign matter by friction between the material and the metal. The thickness of polyurethane is much greater than the spraying thickness, which increases the wear resistance and durability, and greatly reduces the risk of magnetic foreign matter. Of course, the spiral jacket 2 can also be made of non-metallic materials, such as engineering plastics or ceramics, to isolate magnetic foreign matter.

[0049] Reference Figure 1-Figure 8 Of course, both ends of the spiral shaft 1 can be fastened to the multiple spiral sleeves 2 by means of fixing components. In addition, one end of the spiral shaft 1 can also be connected to other components by means of corresponding limiters, and the other end of the spiral shaft 1 is connected by means of fixing components. It can be known that in this case, in order to ensure the reliability of the seal between the corresponding limiter and the adjacent spiral sleeve 2, the corresponding limiter is also provided with components that match the spiral sleeve 2. For example, the first connecting member 4 is provided on the side of the spiral sleeve 2 facing the limiter, and the second connecting member 5 is correspondingly provided on the limiter; similarly, the second connecting member 5 is provided on the side of the spiral sleeve 2 facing the limiter, and the first connecting member 4 is correspondingly provided on the limiter.

[0050] Reference Figure 1-Figure 8 In summary, the spiral shaft 1 mechanism provided by the present application, after the spiral jacket 2 is heated, is pressed into the spiral shaft 1, and forms a key transmission with the plane of the spiral shaft 1. The spiral jackets 2 are connected by stoppers, and foamed silicone sealing pads are installed between the interfaces to ensure the sealing effect. After the spiral jacket 2 is assembled, the bottom spacer 9 is assembled. The size of the bottom spacer 9 can be flexibly designed according to actual needs to adapt to various combination designs with different spiral pitches and blade numbers. When installing the fixed core bottom sleeve 10, the opening needs to be compressed and pressed into the mounting hole. The opening of the pressing mouth pops open, so that it rubs against the wall of the mounting hole to ensure that each spiral jacket 2 will not slip off. Finally, the stopper 11 is installed and fixed with screws to ensure that the opening of the fixed core bottom sleeve 10 is squeezed by force and interferes with it. Friction, completely preventing the loosening and falling of various components.

[0051] Reference Figure 1-Figure 8An embodiment of the present application provides a screw feeder, comprising a silo and a screw shaft 1 mechanism as described in the above embodiment, wherein the screw shaft 1 mechanism is used to transport the material in the silo.

[0052] The wall of the silo is provided with a second wear-resistant part, specifically, the wall of the silo includes the feed port of the silo, the discharge port of the silo, the inner wall of the silo or other places in contact with the material. The second wear-resistant part can be any component with high wear resistance, such as polytetrafluoroethylene or polyurethane. Optionally, the thickness is much greater than the spraying thickness, which increases the wear resistance and durability and greatly reduces the risk of magnetic foreign matter.

[0053] It should be understood that the terms used in the text are only for the purpose of describing specific example embodiments, and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used in the text may also be meant to include plural forms. The terms "include", "comprise", "contain", and "have" are inclusive, and therefore specify the existence of stated features, steps, operations, elements and / or parts, but do not exclude the existence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not interpreted as necessarily requiring them to be performed in the specific order described or illustrated, unless the execution order is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0054] Although the terms first, second, third, etc. can be used in the text to describe multiple elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can only be used to distinguish an element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates, terms such as "first", "second" and other numerical terms do not imply order or sequence when used in the text. Therefore, the first element, component, region, layer or section discussed below can be referred to as the second element, component, region, layer or section without departing from the teaching of the example embodiments.

[0055] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. A screw shaft mechanism, characterized in that: include: Helical shaft; A plurality of spiral sleeves are sleeved on the outer side of the spiral shaft, each of the spiral sleeves is sequentially arranged along the axial direction of the spiral shaft, and the spiral sleeves are provided with spiral blades; A connecting assembly, comprising a first connecting member and a second connecting member that can be detachably matched, the first connecting member and the second connecting member are respectively arranged on both axial sides of the spiral sleeve, and the first connecting member of the spiral sleeve is matched with the second connecting member of the adjacent spiral sleeve; and The fixing assembly is used to fix each of the spiral sleeves on the spiral shaft in a limited position.

2. The screw shaft mechanism according to claim 1, characterized in that: One of the first connecting member and the second connecting member is a stopper, and the other is an interface embedded and matched with the stopper.

3. The screw shaft mechanism according to claim 1, characterized in that: The spiral shaft and the spiral outer sleeve are connected by transmission via a connecting key.

4. The screw shaft mechanism according to claim 3, characterized in that: A keyway is provided on one of the spiral shaft and the spiral sleeve, and the connecting key which is embedded and matched with the keyway is provided on the other.

5. The screw shaft mechanism according to claim 1, characterized in that: The spiral shaft forms a first transmission plane along its own axial direction, and the inner wall of the spiral sleeve forms a second transmission plane that fits with the first transmission plane, and the first transmission plane and the second transmission plane form a key transmission.

6. The screw shaft mechanism according to claim 1, characterized in that: A sealing member is provided between the first connecting member and the second connecting member.

7. The screw shaft mechanism according to any one of claims 1 to 6, characterized in that: The fixing assembly comprises a fixing block, which is arranged at the end of the spiral shaft and abuts against the adjacent spiral sleeve. The fixing block is detachably matched with the spiral shaft through a locking member.

8. The screw shaft mechanism according to any one of claims 1 to 6, characterized in that: The spiral outer sleeve is made of non-metallic material, and a first wear-resistant part is arranged on the outer surface of the spiral outer sleeve.

9. A screw feeder, characterized in that: It comprises a silo and a screw shaft mechanism as described in any one of claims 1 to 8, wherein the screw shaft mechanism is used to transport the material in the silo.

10. The screw feeder according to claim 9, characterized in that: The wall surface of the silo is provided with a second wear-resistant part.

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