Anti-drop connection assembly and stirring device

Abstract

The utility model provides a kind of anti-falling connecting assembly and stirring equipment, and the anti-falling connecting assembly is used to connect stirring shaft and stirring paddle sleeved on stirring shaft, the anti-falling connecting assembly includes first locking member and second locking member, first locking member includes axial locking portion, which is sleeved on stirring shaft, and circumferential transmission portion, which is connected with axial locking portion, axial locking portion is detachably connected with stirring shaft, axial locking portion can rotate synchronously with stirring shaft and axially limit stirring paddle, and circumferential transmission portion is arranged between stirring shaft and stirring paddle for circumferential transmission torque;Second locking member is detachably connected with stirring shaft, and second locking member is used to axially lock first locking member.The utility model constructs axial double locking structure by first locking member and second locking member, which can improve connection reliability under high-speed, high-load stirring condition to prevent blade slip or falling off, and also considers the convenience of disassembly and assembly.

Description

Technical Field

[0001] This utility model relates to the field of mixing equipment technology, and in particular to an anti-detachment connecting component and a mixing device. Background Technology

[0002] In the mechanical design of mixing equipment, the reliability of the connection between the impeller and the mixing shaft is crucial, directly affecting the stability and safety of the entire equipment's operation. Currently, there are two main methods for connecting the impeller hub and the mixing shaft, but both have certain limitations in practical applications. Specifically, the first method uses radial screw fastening, where holes are drilled and tapped in the hub, and the hub is directly locked to the solid shaft by tightening the screws. This method is simple to install, but relying solely on the friction of the screws, it is prone to loosening under long-term vibration and load changes. To solve the loosening problem, spot welding is sometimes used for reinforcement after tightening; however, welding not only affects the appearance but also makes subsequent maintenance and replacement very difficult, often requiring destructive disassembly and potentially damaging the shaft. The second method uses a split hub, where the hub is divided into two halves and clamped to the shaft with bolts, relying on the generated friction to transmit torque. Although this structure does not require slotting or drilling in the shaft, its transmission relies entirely on friction, making it prone to slippage or even detachment under starting, impact, or high-torque conditions. Therefore, its transmission reliability and load-bearing capacity are relatively limited. In summary, existing blade connection methods often struggle to balance reliability, maintainability, and protection of the shaft structure's integrity. Therefore, improving connection reliability under high-speed, high-load mixing conditions to prevent blade slippage or detachment while maintaining ease of assembly and disassembly has become a pressing technical challenge. Utility Model Content

[0003] In order to overcome the above-mentioned defects of the prior art, the present invention provides an anti-detachment connection component and a stirring device, which is used to improve the connection reliability under high speed and high load stirring conditions to prevent the blades from slipping or falling off, while also taking into account the ease of disassembly and assembly.

[0004] The above-mentioned objective of this utility model can be achieved by the following technical solution: This utility model provides an anti-detachment connection assembly for connecting a stirring shaft and a stirring paddle sleeved on the stirring shaft. The anti-detachment connection assembly includes: The first locking member includes an axial locking part sleeved on the stirring shaft and a circumferential transmission part connected to the axial locking part. The axial locking part is detachably connected to the stirring shaft. The axial locking part can rotate synchronously with the stirring shaft and axially limit the stirring paddle relative to the stirring shaft. The circumferential transmission part is disposed between the stirring shaft and the stirring paddle for circumferential torque transmission. A second locking member is detachably connected to the stirring shaft, and the second locking member is used to axially lock the first locking member relative to the stirring shaft.

[0005] In a preferred embodiment of the present invention, the stirring paddle includes a hub and blades disposed on the hub. The axial locking part includes a locking ring, which abuts against one end of the hub. The locking ring is provided with a plurality of spaced first radial screw holes. The anti-detachment connecting assembly further includes a plurality of first fastening bolts, which can pass through the corresponding first radial screw holes and abut against the stirring shaft.

[0006] In a preferred embodiment of the present invention, the circumferential transmission part includes a transmission key, the stirring shaft is provided with a first keyway extending axially, the inner surface of the hub is provided with a second keyway extending axially, and the transmission key is disposed in the first keyway and the second keyway.

[0007] In a preferred embodiment of this utility model, the axial locking part and the circumferential transmission part are integrally formed.

[0008] In a preferred embodiment of the present invention, the axial locking part is detachably connected to the circumferential transmission part.

[0009] In a preferred embodiment of the present invention, the transmission key is provided with a second radial screw hole, wherein one of the first fastening bolts passes through the first radial screw hole and the second radial screw hole and abuts against the stirring shaft.

[0010] In a preferred embodiment of the present invention, the second locking member includes a first cover plate disposed on the lower end of the stirring shaft, the first cover plate being detachably connected to the stirring shaft and abutting against the first locking member.

[0011] In a preferred embodiment of the present invention, the first cover plate is provided with an axial screw hole, and the anti-detachment connection assembly includes a second fastening bolt, which passes through the axial screw hole and is threadedly connected to the stirring shaft.

[0012] In a preferred embodiment of the present invention, a self-locking washer is provided between the second fastening bolt and the first cover plate.

[0013] In a preferred embodiment of the present invention, the stirring shaft is provided with a limiting shoulder, and the limiting shoulder abuts against the other end of the hub; Alternatively, a limiting boss may be provided on the stirring shaft, and the limiting boss abuts against the other end of the hub.

[0014] In a preferred embodiment of the present invention, the anti-detachment connection assembly includes a second cover plate sleeved on the stirring shaft, one side of the second cover plate being used to abut against the limiting shoulder or the limiting boss, and the other side of the second cover plate being used to abut against the other end of the hub.

[0015] This utility model also provides a stirring device, including the aforementioned anti-detachment connecting assembly.

[0016] The technical solution of this utility model has the following significant beneficial effects: The axial locking part of the anti-detachment connecting assembly of this utility model can be detachably fixed to the stirring shaft and form an axial limit on the stirring paddle, thus forming a primary anti-detachment barrier. Based on this, the second locking part of the anti-detachment connecting assembly can be detachably fixed to the stirring shaft and axially limit the first locking part, forming a secondary anti-detachment barrier. The first and second locking parts together construct an axial double locking structure, overcoming the technical defects of screws being prone to loosening and deformation, and providing extremely high connection reliability for harsh working conditions such as high speed, high load, and vibration and impact. Simultaneously, the circumferential transmission part transmits circumferential torque between the stirring shaft and the stirring paddle, fundamentally avoiding the slippage risk associated with friction transmission, as seen in split-type wheel hubs. Furthermore, both the first and second locking parts adopt a detachable connection method, allowing the installation and disassembly of the entire anti-detachment connecting assembly to be completed using conventional tools without relying on special processes or methods such as welding or large pressing equipment, providing better ease of assembly and disassembly. Compared to the existing technology that uses screws and spot welding to prevent detachment, this invention completely avoids damage to components caused by destructive disassembly and assembly, facilitates quick replacement of the mixing paddle, daily maintenance and equipment repair, significantly improves maintenance efficiency and reduces the total life cycle cost. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] The accompanying drawings described herein are for illustrative purposes only and are not intended to limit the scope of this invention in any way. Furthermore, the shapes and proportions of the components in the drawings are merely illustrative to aid in understanding the invention and do not specifically limit the shapes and proportions of the components. Those skilled in the art, under the guidance of this invention, can select various possible shapes and proportions to implement this invention according to specific circumstances.

[0019] Figure 1 This is an exploded structural diagram of one embodiment of the anti-detachment connection assembly described in this utility model; Figure 2 This is a cross-sectional view of one embodiment of the anti-detachment connection assembly described in this utility model; Figure 3 This is a perspective structural diagram of one embodiment of the anti-detachment connection component of this utility model; Figure 4 This is a perspective structural diagram of one embodiment of the first locking member of this utility model.

[0020] The reference numerals in the above figures are as follows: 10. Stirring shaft; 11. First keyway; 12. Limiting shoulder; 20. Agitator; 21. Hub; 22. Blade; 23. Second keyway; 100. First locking element; 110. Axial locking part; 111. Locking ring; 112. First radial threaded hole; 120. Circumferential transmission part; 121. Transmission key; 122. Second radial threaded hole; 123. Positioning shoulder; 200. Second locking element; 210. First cover plate; 211. Axial bearing surface; 212. Axial threaded hole; 300. First fastening bolt; 400. Second fastening bolt; 500. Self-locking washer; 600, Second cover plate. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Implementation Method 1

[0023] Please refer to the following: Figures 1 to 4As shown, an embodiment of this utility model provides an anti-detachment connection assembly for connecting a stirring shaft 10 and a stirring paddle 20 sleeved on the stirring shaft 10. The anti-detachment connection assembly includes a first locking member 100 and a second locking member 200. The first locking member 100 includes an axial locking part 110 sleeved on the stirring shaft 10 and a circumferential transmission part 120 connected to the axial locking part 110. The axial locking part 110 is detachably connected to the stirring shaft 10 and can rotate synchronously with the stirring shaft 10 and axially limit the stirring paddle 20 relative to the stirring shaft 10. The circumferential transmission part 120 is disposed between the stirring shaft 10 and the stirring paddle 20 for circumferential torque transmission. The second locking member 200 is detachably connected to the stirring shaft 10 and is used to axially lock the first locking member 100 relative to the stirring shaft 10.

[0024] Overall, the axial locking part 110 in the anti-detachment connection assembly can be detachably fixed to the stirring shaft 10 and axially limit the stirring paddle 20, forming a primary anti-detachment barrier. On this basis, the second locking member 200 in the anti-detachment connection assembly can be detachably fixed to the stirring shaft 10 and axially limit the first locking member 100, forming a secondary anti-detachment barrier.

[0025] The first locking element 100 and the second locking element 200 together form an axial double locking structure, overcoming the technical defects of screws being prone to loosening and deformation, and providing extremely high connection reliability for harsh working conditions such as high speed, high load, and vibration and impact. At the same time, the circumferential transmission part 120 transmits circumferential torque between the stirring shaft 10 and the stirring paddle 20, fundamentally avoiding the slippage risk that relies on friction transmission like a split-type wheel hub.

[0026] Furthermore, both the first locking component 100 and the second locking component 200 adopt a detachable connection method, so that the installation and disassembly of the entire anti-detachment connection assembly does not rely on special processes or methods such as welding or large press-fitting equipment, but can be completed using only conventional tools, which has better ease of installation and disassembly.

[0027] Compared to the existing technology that uses screws and spot welding to prevent detachment, this utility model completely avoids damage to components caused by destructive disassembly and assembly, facilitates the quick replacement of the mixing paddle 20, daily maintenance and equipment inspection, significantly improves maintenance efficiency and reduces the total life cycle cost.

[0028] In the embodiments of this utility model, such as Figure 1 and Figure 2In the embodiment shown, the stirring paddle 20 includes a hub 21 and blades 22 disposed on the hub 21. The axial locking part 110 includes a locking ring 111, which abuts against one end of the hub 21. The locking ring 111 is provided with a plurality of spaced first radial screw holes 112. The anti-detachment connection assembly also includes a plurality of first fastening bolts 300, which can pass through the corresponding first radial screw holes 112 and be screwed onto the stirring shaft 10.

[0029] Designers can adjust the number and arrangement of blades 22 according to usage needs. For example, the number of blades can be set to one, two, three or other numbers, without specific restrictions.

[0030] The locking ring 111 is coaxially sleeved on the stirring shaft 10 with the stirring paddle 20. The locking ring 111 can abut against one end of the hub 21, thereby providing axial positioning for the stirring paddle 20.

[0031] And, as Figure 4 In the embodiment shown, the locking ring 111 is provided with a plurality of first radial screw holes 112. The first fastening bolt 300 can pass through the first radial screw holes 112 and abut against the stirring shaft 10, thereby generating a reliable radial fastening effect, preventing the locking ring 111 from axially displacing during use, and enabling the locking ring 111 and the stirring shaft 10 to rotate synchronously.

[0032] Designers can adjust the specific number and arrangement of the first radial screw holes 112 and the first fastening bolts 300 according to usage needs, without making specific restrictions here. For example, the first radial screw holes 112 can be set to three, four, or other numbers.

[0033] In the embodiments of this utility model, such as Figure 2 and Figure 4 In the embodiment shown, the circumferential transmission part 120 includes a transmission key 121, the stirring shaft 10 is provided with a first keyway 11 extending axially, the inner surface of the hub 21 is provided with a second keyway 23 extending axially, and the transmission key 121 is disposed in the first keyway 11 and the second keyway 23.

[0034] The key drive structure is formed by the engagement of the key 121 with the first keyway 11 and the second keyway 23. Compared with the existing split-type hub, the key drive eliminates the problem of torque slippage, ensuring transmission efficiency under high torque. Furthermore, the key drive has better shear resistance and reliability, which helps to extend the service life of the anti-detachment connection components.

[0035] Designers can adjust the specific arrangement of the transmission key 121 according to usage needs, and no specific restrictions are imposed here. In one feasible embodiment, the transmission key 121 extends axially.

[0036] In an extended embodiment, multiple transmission keys 121 are provided, and the multiple transmission keys 121 are spaced apart on the locking ring 111. By cooperating with each other, the torque is distributed, which helps to reduce the risk of deformation and damage to the transmission keys 121.

[0037] In the embodiments of this utility model, the designer can adjust the arrangement between the axial locking part 110 and the circumferential transmission part 120 according to the needs of use, and no specific restrictions are made here.

[0038] In one feasible embodiment, the axial locking part 110 and the circumferential transmission part 120 are integrally formed. By making the axial locking part 110 and the circumferential transmission part 120 integrally formed, the structural strength between the two is improved, the number of parts is simplified, and the assembly complexity is reduced.

[0039] In another feasible embodiment, the axial locking part 110 is detachably connected to the circumferential transmission part 120. By detachably connecting the axial locking part 110 to the circumferential transmission part 120, the locking ring 111 or the transmission key 121 can be replaced individually according to the wear condition, significantly reducing spare parts costs and maintenance expenses.

[0040] Specifically, such as Figure 2 and Figure 4 In the embodiment shown, the transmission key 121 is provided with a second radial screw hole 122, and a first fastening bolt 300 passes through the first radial screw hole 112 and the second radial screw hole 122 and abuts against the stirring shaft 10.

[0041] By providing a second radial screw hole 122 on the transmission key 121, one of the first fastening bolts 300 can pass through both the first radial screw hole 112 and the second radial screw hole 122 simultaneously, thereby fixing the transmission key 121 to the inner side of the locking ring 111. Furthermore, the end of the first fastening bolt 300 can also abut against the stirring shaft 10, thus playing a certain radial limiting role.

[0042] In an extended embodiment, the lower end of the transmission key 121 is provided with a positioning shoulder 123, and the transmission key 121 abuts against the locking ring 111 through the positioning shoulder 123, thereby improving the matching accuracy between the two and improving the installation efficiency.

[0043] In one feasible embodiment of this utility model, such as Figure 1 and Figure 3 In the embodiment shown, the second locking member 200 includes a first cover plate 210 covering the lower end of the stirring shaft 10. The first cover plate 210 is detachably connected to the stirring shaft 10 and abuts against the first locking member 100.

[0044] The first cover plate 210 can be placed on the lower end of the stirring shaft 10, which can effectively seal the shaft end and prevent external impurities from entering the keyway or threaded connection, thus playing a protective role and helping to protect the internal structure.

[0045] Furthermore, the first cover plate 210 can provide a reliable axial bearing surface 211, which abuts against the first locking member 100, thereby axially locking the first locking member 100 and preventing the first locking member 100 from being damaged by axial displacement.

[0046] Designers can adjust the detachable connection between the first cover plate 210 and the stirring shaft 10 according to usage needs, and no specific restrictions are imposed here.

[0047] In one feasible embodiment, such as Figure 1 and Figure 2 In the embodiment shown, the first cover plate 210 is provided with an axial screw hole 212, and the anti-detachment connection assembly includes a second fastening bolt 400, which passes through the axial screw hole 212 and is threadedly connected to the stirring shaft 10.

[0048] The locking is achieved by using a second axial fastening bolt 400, whose force direction is axial and consistent with the possible loosening direction of the first locking member 100, thus providing a better locking effect. Furthermore, the second fastening bolt 400 can be installed from the shaft end, facilitating operation by the operator.

[0049] The first cover plate 210 and the locking ring 111 achieve axial double locking, which can improve the connection reliability under high speed and high load stirring conditions. Together with the key transmission method, it prevents the stirring paddle 20 from slipping or falling off, and also takes into account the convenience of disassembly and assembly.

[0050] Furthermore, such as Figure 1 and Figure 2 In the illustrated embodiment, a self-locking washer 500 is provided between the second fastening bolt 400 and the first cover plate 210. The self-locking washer 500 provides additional anti-loosening protection for the second fastening bolt 400, effectively resisting thread loosening caused by vibration and improving the connection reliability of the second fastening bolt 400 under long-term vibration.

[0051] In another feasible embodiment, the first cover plate 210 is provided with an internal thread, and the end of the stirring shaft 10 is provided with an external thread. The first cover plate 210 is threadedly connected to the stirring shaft 10. Furthermore, the tightening direction of the threaded pair formed by the internal thread and the external thread is the same as the rotation direction of the stirring shaft 10, thereby achieving self-locking.

[0052] Of course, in other feasible embodiments, designers can adjust the specific shape and structure of the second locking member 200 according to the needs of use, such as a block, bracket, rod, or other structure that has the same function as the first cover plate 210, without making specific restrictions here.

[0053] In the embodiments of this utility model, the designer may adjust the specific structure of the stirring shaft 10 according to the needs of use, and no specific limitations are made here.

[0054] In one feasible embodiment, such as Figure 1 and Figure 2 In the illustrated embodiment, the stirring shaft 10 is provided with a limiting shoulder 12, which abuts against the other end of the hub 21. The limiting shoulder 12 and the first locking member 100 are respectively disposed on both sides of the hub 21. Through the cooperation of the limiting shoulder 12 and the first locking member 100, the hub 21 can be axially limited from both sides, ensuring that the stirring paddle 20 is located in the target installation position. The limiting shoulder 12 is an end face that is radially recessed relative to the outer circumferential surface of the stirring shaft 10.

[0055] In another feasible embodiment, the stirring shaft 10 is provided with a limiting boss instead of a limiting shoulder, and the limiting boss abuts against the other end of the hub 21 of the stirring paddle 20. The limiting boss and the first locking member 100 are respectively provided on both sides of the hub 21. Through the cooperation of the limiting boss and the first locking member 100, the hub 21 can be axially limited from both sides, ensuring that the stirring paddle 20 is located in the target installation position. The limiting boss protrudes radially from the outer peripheral surface of the stirring shaft 10.

[0056] Furthermore, in an extended embodiment, the anti-detachment connection assembly also includes a second cover plate 600 sleeved on the stirring shaft 10. One side of the second cover plate 600 is used to abut against the limiting shoulder 12 or the limiting boss, and the other side of the second cover plate 600 is used to abut against the other end of the hub 21.

[0057] By setting the second cover plate 600, the second cover plate 600 can serve as an independent, detachable wear-resistant component. The second cover plate 600 can directly bear the axial force of the hub 21 and transmit it to the limiting shoulder 12 or the limiting boss, thus avoiding direct wear of the limiting shoulder 12 or the limiting boss and helping to improve the service life of the stirring shaft 10.

[0058] Implementation Method 2

[0059] An embodiment of this utility model provides a stirring device, which includes an anti-detachment connecting assembly as described in Embodiment 1. The specific structure and beneficial effects of the anti-detachment connecting assembly are the same as those described in Embodiment 1, and will not be repeated here.

[0060] By adopting this anti-detachment connection component, the mixing equipment achieves extremely high transmission reliability and operational safety under high-speed and high-load mixing conditions. It also improves the convenience and economy of equipment maintenance, thereby increasing production efficiency and overall equipment utilization benefits.

[0061] All articles and references disclosed herein, including patent applications and publications, are incorporated herein by reference for various purposes. The term “substantially constitutes…” used to describe a combination should include the identified element, component, part, or step, as well as other elements, components, parts, or steps that do not substantially affect the essential novelty of the combination. The use of the terms “comprising” or “including” to describe combinations of elements, components, parts, or steps herein also contemplates embodiments substantially constituted by such elements, components, parts, or steps. The use of the term “may” herein is intended to indicate that any described attribute included by “may” is optional. Multiple elements, components, parts, or steps can be provided by a single integrated element, component, part, or step. Alternatively, a single integrated element, component, part, or step can be divided into multiple separate elements, components, parts, or steps. The use of “a” or “an” to describe an element, component, part, or step is not intended to exclude other elements, components, parts, or steps.

[0062] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. A non-detachable connecting assembly for connecting a stirring shaft and a stirring blade sleeved on the stirring shaft, characterized in that, The anti-detachment connection component includes: The first locking member includes an axial locking part sleeved on the stirring shaft and a circumferential transmission part connected to the axial locking part. The axial locking part is detachably connected to the stirring shaft. The axial locking part can rotate synchronously with the stirring shaft and axially limit the stirring paddle relative to the stirring shaft. The circumferential transmission part is disposed between the stirring shaft and the stirring paddle for circumferential torque transmission. A second locking member is detachably connected to the stirring shaft, and the second locking member is used to axially lock the first locking member relative to the stirring shaft.

2. The anti-detachment connection assembly as described in claim 1, characterized in that, The stirring paddle includes a hub and blades disposed on the hub. The axial locking part includes a locking ring that abuts against one end of the hub. The locking ring is provided with a plurality of spaced first radial screw holes. The anti-detachment connection assembly also includes a plurality of first fastening bolts that can pass through the corresponding first radial screw holes and abut against the stirring shaft.

3. The anti-detachment connection assembly as described in claim 2, characterized in that, The circumferential transmission part includes a transmission key, the stirring shaft is provided with a first keyway extending axially, the inner surface of the hub is provided with a second keyway extending axially, and the transmission key is disposed in the first keyway and the second keyway.

4. The anti-detachment connection assembly as described in claim 3, characterized in that, The axial locking part and the circumferential transmission part are integrally formed.

5. The anti-detachment connection assembly as described in claim 3, characterized in that, The axial locking part is detachably connected to the circumferential transmission part.

6. The anti-detachment connection assembly as described in claim 5, characterized in that, The transmission key is provided with a second radial screw hole, and one of the first fastening bolts passes through the first radial screw hole and the second radial screw hole and abuts against the stirring shaft.

7. The anti-detachment connection assembly as described in claim 1, characterized in that, The second locking member includes a first cover plate disposed on the lower end of the stirring shaft, the first cover plate being detachably connected to the stirring shaft and abutting against the first locking member.

8. The anti-detachment connection assembly as described in claim 7, characterized in that, The first cover plate is provided with an axial screw hole, and the anti-detachment connection assembly includes a second fastening bolt, which passes through the axial screw hole and is threaded to the stirring shaft; a self-locking washer is provided between the second fastening bolt and the first cover plate.

9. The anti-detachment connection assembly as described in claim 2, characterized in that, The stirring shaft is provided with a limiting shoulder, and the limiting shoulder abuts against the other end of the hub; Alternatively, a limiting boss may be provided on the stirring shaft, and the limiting boss abuts against the other end of the hub.

10. The anti-detachment connection assembly as described in claim 9, characterized in that, The anti-detachment connection assembly includes a second cover plate sleeved on the stirring shaft. One side of the second cover plate is used to abut against the limiting shoulder or the limiting boss, and the other side of the second cover plate is used to abut against the other end of the hub.

11. A mixing device, characterized in that, Includes the anti-detachment connection component as described in any one of claims 1 to 10.

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