PP fan impeller convenient to disassemble

Abstract

This utility model discloses a PP fan impeller that is easy to assemble and disassemble, including an impeller body and a drive shaft. A fixed mounting shaft is welded to the rear end of the impeller body. The fixed mounting shaft has a shaft hole and a keyway inside, and a plug is fixed to its front end with bolts. A right-angle operating groove and a limiting hole are provided on the side of the front end of the fixed mounting shaft. The front end of the drive shaft is inserted into the shaft hole, and a key block on it is inserted into the keyway; a retaining pin is elastically installed inside the key block by a helical spring. During installation, the drive shaft is inserted into the shaft hole, the key block slides into the keyway for guidance, and at the end point, the retaining pin automatically engages with the limiting hole under the action of the spring to achieve axial locking. During disassembly, the retaining pin is pressed through the right-angle operating groove to disengage it from the limiting hole, allowing the drive shaft to be pulled out. This utility model achieves quick assembly and disassembly between the impeller and the drive shaft, eliminating the need for tools to loosen multiple bolts, simplifying operation, improving maintenance efficiency, and is particularly suitable for applications requiring frequent impeller cleaning or replacement.

Description

Technical Field

[0001] This utility model relates to the field of PP fan impeller technology, specifically a PP fan impeller that is easy to disassemble and assemble. Background Technology

[0002] PP (polypropylene) fan impellers are widely used in ventilation and waste gas treatment systems in industries such as chemical engineering, electroplating, and environmental protection due to their excellent corrosion resistance, lightweight yet high strength, and moderate cost. In practical applications, the impeller needs to be connected to the output shaft of the fan motor via its drive shaft to transmit torque and achieve normal operation.

[0003] Currently, the common connection method between the impeller and drive shaft of PP fan is to use a flange connection structure, that is, to set a flange in the middle of the rear end of the impeller and fasten it to the flange at the end of the drive shaft with bolts.

[0004] In actual use, flange connections require multiple bolts for fixing, and the installation and disassembly process is cumbersome and time-consuming, especially in situations where frequent maintenance or impeller replacement is required, which reduces work efficiency.

[0005] Therefore, we propose a PP fan impeller that is easy to disassemble and assemble. Utility Model Content

[0006] (a) Technical problems to be solved To address the shortcomings of existing technologies, this utility model provides a PP fan impeller that is easy to assemble and disassemble. Through a plug-in and spring pin automatic locking mechanism, it achieves quick assembly and disassembly without tools, simply by plugging in and locking, and by pressing and disassembling, thereby improving maintenance efficiency and effectively solving the problems in the background technology.

[0007] (II) Technical Solution To achieve the above objectives, the technical solution adopted by this utility model is as follows: a PP fan impeller that is easy to disassemble and assemble, comprising an impeller body and a drive shaft. A fixed mounting shaft is welded to the middle of the outer surface of the rear end of the impeller body. The front end of the fixed mounting shaft extends into the middle of the rear end of the impeller body. A shaft hole is formed in the middle of the outer surface of the rear end of the fixed mounting shaft. The shaft hole extends to the middle of the outer surface of the front end of the fixed mounting shaft. A plug is provided at the front end of the shaft hole. The plug is detachably fixed to the outer surface of the front end of the fixed mounting shaft by bolts. A keyway is formed on one side of the shaft hole. A right-angle operating groove is formed at the front end of the outer surface of one side of the fixed mounting shaft. A limit hole is formed at the lower end of the right-angle operating groove. The lower end of the limit hole extends to the upper part of the front end of the keyway. A key block is fixedly installed at the front end of the outer surface of one side of the drive shaft. A mounting hole is formed at the front end of the upper outer surface of the key block. A helical spring is provided in the mounting hole. A retaining pin is connected to the upper part of the helical spring.

[0008] Preferably, the outer wall of the front end of the drive shaft and the shaft hole are fitted together by an insertion joint, and the outer wall of the key block and the keyway are fitted together by an insertion joint.

[0009] Preferably, the right-angle operating groove is located at the front end of the fixed mounting shaft and at the rear end of the impeller body cavity.

[0010] Preferably, the lower outer surface of the helical spring is fixedly connected to the bottom of the mounting hole, and the upper outer surface of the helical spring is fixedly connected to the lower outer surface of the snap-fit ​​pin.

[0011] Preferably, when the helical spring is in its natural state, the upper end of the locking pin protrudes from the upper surface of the key block.

[0012] Preferably, the outer wall of the upper part of the locking pin is locked to the limiting hole.

[0013] (III) Beneficial Effects Compared with the prior art, this utility model provides a PP fan impeller that is easy to disassemble and assemble, and has the following beneficial effects: 1. This easy-to-assemble and disassemble PP fan impeller achieves quick alignment and initial connection between the impeller and the drive shaft by using a plug-in connection between the drive shaft and the fixed mounting shaft, and by utilizing the guiding effect of the key block and keyway. The locking pin automatically engages with the limiting hole under the action of the helical spring to complete the final locking, achieving the effect of "one-plug lock". During disassembly, simply press the locking pin from the outside through the right-angle operating groove to disengage it from the limiting hole, and the drive shaft can be pulled out. The entire process does not require any tools or tightening multiple bolts, simplifying the operation process, and is particularly suitable for occasions that require frequent cleaning, replacement or maintenance of the impeller.

[0014] 2. This PP fan impeller is easy to disassemble and assemble. The present invention adopts a multi-stage limiting structure to ensure the stability of the connection; the insertion fit between the drive shaft and the shaft hole bears the main radial force; the fit between the key block and the keyway bears the torque and effectively prevents circumferential rotation; while the plug, the locking pin and the limiting hole bear the axial force to prevent the impeller from accidentally falling off the drive shaft during operation. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of a PP fan impeller that is easy to assemble and disassemble according to this utility model.

[0016] Figure 2 This is a schematic diagram of the structure of a PP fan impeller that is easy to assemble and disassemble, after the fixed mounting shaft is connected to the drive shaft.

[0017] Figure 3 This is a schematic diagram of the structure of a PP fan impeller with a fixed mounting shaft and a plug plate that is easy to disassemble and assemble according to this utility model.

[0018] Figure 4 This is a schematic diagram of the drive shaft and key block in a PP fan impeller that is easy to disassemble and assemble according to this utility model.

[0019] In the diagram: 1. Impeller body; 2. Fixed mounting shaft; 3. Drive shaft; 4. Block; 5. Right-angle operating groove; 6. Limiting hole; 7. Key block; 8. Keyway; 9. Shaft hole; 10. Mounting hole; 11. Helical spring; 12. Snap-fit ​​pin. Detailed Implementation

[0020] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0021] like Figure 1-4 As shown, this utility model provides a PP fan impeller that is easy to assemble and disassemble, including an impeller body 1 and a drive shaft 3. A fixed mounting shaft 2 is welded to the middle of the outer surface of the rear end of the impeller body 1, and the front end of the fixed mounting shaft 2 extends into the middle of the rear end of the inner cavity of the impeller body 1. A shaft hole 9 is formed in the middle of the outer surface of the rear end of the fixed mounting shaft 2, and the shaft hole 9 extends to the middle of the outer surface of the front end of the fixed mounting shaft 2. A plug 4 is provided at the front end of the shaft hole 9, and the plug 4 is detachably fixed to the outer surface of the front end of the fixed mounting shaft 2 by bolts. A keyway 8 is formed on one side of the shaft hole 9. A right-angle operating groove 5 is formed at the front end of the outer surface of one side of the fixed mounting shaft 2, and a limiting hole 6 is formed at the lower end of the right-angle operating groove 5, and the lower end of the limiting hole 6 extends to the upper part of the front end of the keyway 8. The outer wall of the front end of the drive shaft 3 and the shaft hole 9 are in a clearance fit insertion relationship. A key block 7 is fixedly installed at the front end of the outer surface of one side of the drive shaft 3, and the outer wall of the key block 7 and the keyway 8 are in a clearance fit insertion relationship. A mounting hole 10 is provided at the front end of the upper outer surface of the key block 7. A helical spring 11 is installed in the mounting hole 10. The lower outer surface of the helical spring 11 is fixedly connected to the bottom of the mounting hole 10, and the upper outer surface of the helical spring 11 is fixedly connected to the lower outer surface of the locking pin 12. When the helical spring 11 is in its natural state, the upper end of the locking pin 12 protrudes from the upper surface of the key block 7. The upper outer wall of the locking pin 12 is engaged with the limiting hole 6.

[0022] The right-angle operating slot 5 is located at the front end of the fixed mounting shaft 2 and at the rear end of the impeller body 1. This structure ensures that after the impeller is assembled, the locking pin 12 can be operated by inserting a special tool (such as a thin rod) into the right-angle operating slot 5 from the rear of the impeller.

[0023] The assembly process of this utility model is as follows: First, press the locking pin 12 of the key block 7 on the drive shaft 3. The locking pin 12 moves downward along the mounting hole 10 and compresses the coil spring 11 until the upper end of the locking pin 12 is completely retracted into the upper surface of the key block 7. Then, align the front end of the drive shaft 3 with the shaft hole 9 at the rear end of the fixed mounting shaft 2, and align the key block 7 with the entrance of the keyway 8. Insert the drive shaft 3 into the shaft hole 9, and the key block 7 slides into the keyway 8, serving as a guide and transmitting torque. When fully inserted, the locking pin 12 pops upward under the return force of the coil spring 11, and its upper part just engages in the limiting hole 6 on the fixed mounting shaft 2, thus completing the axial locking of the drive shaft 3 and the impeller body 1. Finally, use bolts to fix the plug 4 to the front end of the fixed mounting shaft 2. The plug 4 serves as an auxiliary axial limiter.

[0024] The disassembly process of this utility model is as follows: First, using a tool (such as a slender rod), press down on the retaining pin 12, which is already locked in the limiting hole 6, through the right-angle operating groove 5. This causes the pin to move downwards against the elastic force of the coil spring 11 until the upper end of the retaining pin 12 is completely disengaged from the limiting hole 6. At this point, the axial lock is released, and the drive shaft 3 can be pulled out of the shaft hole 9, achieving rapid separation of the impeller from the drive shaft.

[0025] It should be noted that the impeller body 1 and its PP material involved in this utility model are existing technologies and can be readily understood by those skilled in the art; the specific structure will not be described in detail here. The core of this utility model lies in the unique quick-connection and locking mechanism between the impeller and the drive shaft.

[0026] It should be noted that, in this document, relational terms such as first and second (number one, number two), etc., are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0027] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A PP fan impeller convenient to disassemble, comprising an impeller body (1) and a driving shaft (3), characterized in that: A fixed mounting shaft (2) is welded to the middle of the outer surface of the rear end of the impeller body (1). The front end of the fixed mounting shaft (2) extends into the middle of the rear end of the impeller body (1). A shaft hole (9) is provided in the middle of the outer surface of the rear end of the fixed mounting shaft (2). The shaft hole (9) extends through to the middle of the outer surface of the front end of the fixed mounting shaft (2). A plug (4) is provided at the front end of the shaft hole (9). The plug (4) is detachably fixed to the outer surface of the front end of the fixed mounting shaft (2) by bolts. A keyway is provided on one side of the shaft hole (9). (8) A right-angle operating groove (5) is provided at the front end of the outer surface of one side of the fixed mounting shaft (2). A limit hole (6) is provided at the lower end of the right-angle operating groove (5). The lower end of the limit hole (6) extends to the upper part of the front end of the keyway (8). A key block (7) is fixedly installed at the front end of the outer surface of one side of the drive shaft (3). A mounting hole (10) is provided at the front end of the upper outer surface of the key block (7). A helical spring (11) is provided in the mounting hole (10). A snap-fit ​​pin (12) is connected to the upper part of the helical spring (11).

2. The PP fan impeller convenient to disassemble according to claim 1, characterized in that: The outer wall of the front end of the drive shaft (3) is plugged into the shaft hole (9), and the outer wall of the key block (7) is plugged into the keyway (8).

3. The PP fan impeller convenient to disassemble according to claim 2, characterized in that: The right-angle operating groove (5) is located at the front end of the fixed mounting shaft (2) and at the rear end of the impeller body (1) cavity.

4. The PP fan impeller that is easy to disassemble and assemble according to claim 3, characterized in that: The lower outer surface of the helical spring (11) is fixedly connected to the bottom of the mounting hole (10), and the upper outer surface of the helical spring (11) is fixedly connected to the lower outer surface of the snap pin (12).

5. The PP fan impeller convenient to disassemble according to claim 4, characterized in that: When the helical spring (11) is in its natural state, the upper end of the locking pin (12) protrudes from the upper surface of the key block (7).

6. The PP fan impeller that is easy to disassemble and assemble according to claim 5, characterized in that: The outer wall of the upper part of the snap-fit ​​pin (12) is snapped into the limiting hole (6).

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