Impeller stable locking structure
By designing a robust impeller locking structure, and utilizing the threaded connection and spring force of components such as connecting plates, inclined plates, and limiting blocks, the problem of keyed impeller wear was solved, achieving a stable lock between the impeller and the shaft, thus improving service life and stability.
Patent Information
- Application Number
- CN202520504146.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-21
- Publication Date
- 2026-01-27
- Estimated Expiration
- 2035-03-21
AI Technical Summary
The keyed impeller and shaft are prone to wear under long-term operation, which affects long-term stability and service life.
A robust locking structure for an impeller is designed, comprising a connecting part and a connecting part. Through the cooperation of components such as connecting plates, inclined plates, limiting blocks, and fixing rings, and utilizing threaded connections and the elastic force of springs, a robust locking between the impeller and the shaft is achieved.
It effectively reduces impeller wear during long-term operation, improving service life and connection stability.
Smart Images
Figure CN223839394U_ABST
Abstract
Description
Technical Field
[0001] This utility model discloses an impeller stabilizing and locking structure, which relates to the field of impeller assembly technology. Background Technology
[0002] The impeller is a key component in an electric motor used to propel air or liquid, and is widely used in equipment such as fans and electric pumps. The installation and connection of the impeller is crucial to the performance, efficiency, and stability of the motor. The installation and connection method of the impeller depends on the type of motor, its application, and design requirements. Common connection methods include keyed connections, threaded connections, press-fit connections, splined connections, and hydraulic connections. During installation, it is essential to ensure a secure and well-balanced connection between the impeller and the motor shaft and end cover, while also considering the needs for sealing, vibration damping, and efficient operation. Keyed connections are the most common method and are suitable for most motor and fan impellers. Keyways are machined into the inner bore of the impeller and the motor shaft, and a key (usually a square key or a semi-circular key) is inserted to secure the connection between the impeller and the shaft. The advantages of keyed connections are simple structure, low cost, and sufficient torque transmission capacity.
[0003] The keyed impeller and shaft are prone to wear under long-term operation, affecting long-term stability. Therefore, a robust impeller locking structure is needed to solve this problem. Utility Model Content
[0004] The purpose of this invention is to provide a stable locking structure for the impeller, thereby providing a stable locking structure while connecting the impeller via a key, which reduces wear during long-term operation and extends the service life of the impeller.
[0005] To achieve the above objectives, this utility model provides the following technical solution: an impeller stabilizing and locking structure, comprising an impeller body and a connecting part, a connecting part installed below the impeller body, and a fixing ring installed on the connecting part; the connecting part includes a connecting piece, and a snap-fit body installed below the connecting piece; the connecting part includes an inclined piece, a housing installed below the inclined piece, and a limit block installed on the inner side of the inclined piece.
[0006] Preferably, a fixing post is installed at the central axis inside the outer shell, a snap-fit block is installed above the fixing post, a long straight groove is provided on the connecting piece, a horizontal groove is provided on the left side of the long straight groove, and a short straight groove is provided below the horizontal groove. The long straight groove, the horizontal groove and the short straight groove are connected through each other; wherein, the snap-fit block moves in the long straight groove, the horizontal groove and the short straight groove.
[0007] Preferably, there are four sets of connecting pieces, evenly distributed in a circular pattern, with a movable gap between the two sets of connecting pieces.
[0008] Preferably, the limiting block is provided with a ramp.
[0009] Preferably, a spring is installed on the outside of the fixed column, and a sliding block is installed on the spring.
[0010] Preferably, the inclined plate and the outer side of the outer shell are provided with threads, the inner side of the fixing ring is provided with threads, the fixing ring is threadedly connected to the inclined plate and the outer shell, and four sets of inclined plates are evenly arranged, with a certain inclination of the inclined plate.
[0011] Preferably, the snap-fit body is trapezoidal in shape.
[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: The operator aligns the long straight groove below the connecting piece with the position of the locking block, allowing it to engage in the long straight groove. After moving to the maximum distance, the impeller body is turned counterclockwise, causing the locking block to move from the connection between the long straight groove and the horizontal groove to the connection between the horizontal groove and the short straight groove. Then, the impeller body is lifted upwards, allowing the locking block to enter the bottom of the short straight groove to complete the positioning. After the locking body is locked below the limiting block, the operator turns the fixing ring, moving it upwards in a threaded connection manner. When the fixing ring moves to the inclined plate, the inner diameter of the fixing ring continuously moves upwards, simultaneously squeezing the inclined plate with a certain inclination inwards, pressing the internal connecting piece to fix its outer side. At the same time, the spring pushes the sliding block upwards to lock the locking body below the limiting block, and the elastic force provides an upward pressure, thereby achieving a stable locking effect. Attached Figure Description
[0013] Figure 1 A schematic diagram of an impeller stabilizing and locking structure;
[0014] Figure 2 for Figure 1 A schematic internal cross-sectional view of a type of impeller stabilizing and locking structure;
[0015] The following are the labeling elements in the figure:
[0016] 1. Impeller body; 2. Connecting part; 21. Connecting plate; 211. Long straight groove; 212. Horizontal groove; 213. Short straight groove; 22. Snap-fit body; 23. Movement gap; 3. Connecting part; 31. Inclined plate; 311. Outer shell; 312. Limiting block; 32. Fixing column; 33. Spring; 34. Sliding block; 35. Snap-fit block; 4. Fixing ring. Detailed Implementation
[0017] 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.
[0018] Specific implementation examples:
[0019] like Figure 1 As shown, an impeller stabilizing and locking structure includes an impeller body 1 and a connecting part 3. A connecting part 2 is installed below the impeller body 1, and a fixing ring 4 is installed on the connecting part 3.
[0020] The connecting part 2 and the impeller body 1 are an integral unit, and the connecting part 3 and the fixing ring 4 are an integral unit. In use, the connecting part 2 is inserted into the connecting part 3, and the connecting part 3 is fixedly connected to the shaft (not shown in the figure). The impeller body 1 and the shaft are still connected by a traditional key, and the connecting part 2 and the connecting part 3 are fixedly sleeved on its outer periphery.
[0021] like Figure 2 As shown, the connecting part 2 includes a connecting piece 21, and a snap-fit body 22 is installed below the connecting piece 21;
[0022] The connecting part 3 includes an inclined plate 31, a housing 311 is installed below the inclined plate 31, and a limit block 312 is installed inside the inclined plate 31;
[0023] The connecting part 2 is installed into the connecting part 3 by plugging. The snap-fit body 22 inside the connecting piece 21 is trapezoidal in shape and can be inserted into the connecting part 3 along the inclined piece 31. The limiting block 312 can restrict the movement of the snap-fit body 22.
[0024] In order to allow the connecting piece 21 to better enter the connecting part 3, the connecting piece 21 is provided in four groups, which are evenly distributed in a circumferential manner. There is an active gap 23 between two groups of connecting pieces 21. When the connecting piece 21 is inserted, it can be resisted by the limiting block 312, biased inward, and finally snapped into the connecting part 3.
[0025] The limiting block 312 is provided with a ramp, which makes the movement of the connecting piece 21 more smooth when it is inserted, and increases the stability of the structure.
[0026] When the impeller body 1 is connected to the connecting part 3, a locking structure is required to meet the stability requirement. Therefore, a fixing post 32 is installed at the central shaft inside the outer shell 311. A snap-fit block 35 is installed above the fixing post 32. A long straight groove 211 is provided on the connecting piece 21. A transverse groove 212 is provided on the left side of the long straight groove 211. A short straight groove 213 is provided below the transverse groove 212. The long straight groove 211, the transverse groove 212 and the short straight groove 213 are connected through each other.
[0027] The locking block 35 moves within the long straight groove 211, the horizontal groove 212, and the short straight groove 213;
[0028] In actual operation, the long straight groove 211 in the connecting piece 21 passes through the bottom of the connecting piece 21. The long straight groove 211 below the connecting piece 21 is aligned with the position of the locking block 35, so that it is locked into the long straight groove 211. When it moves to the maximum distance, the operator turns the impeller body 1 counterclockwise, so that the locking block 35 moves from the connection between the long straight groove 211 and the horizontal groove 212 to the connection between the horizontal groove 212 and the short straight groove 213. Then, the impeller body 1 is lifted upward, so that the locking block 35 enters the bottom of the short straight groove 213 to complete the positioning.
[0029] In actual operation, a locking force is needed to provide a locking force for the movement of the groove on the connecting piece 21 and the snap-fit block 35. Therefore, a spring 33 is installed on the outside of the fixing post 32, and a sliding block 34 is installed on the spring 33.
[0030] When the connecting piece 21 enters the interior of the outer shell 311, it first contacts the sliding block 34. As the connecting piece 21 continues to move downward, it presses the sliding block 34 down along the inner wall of the outer shell 311, and the spring 33 is compressed. When the locking block 35 moves to the connection between the transverse groove 212 and the short straight groove 213, the spring 33 bounces up until the locking block 35 enters the bottom of the short straight groove 213. The upper surface of the locking body 22 below the inclined piece 31 contacts the lower surface of the limiting block 312, that is, the locking body 22 is locked below the limiting block 312.
[0031] When the snap-fit body 22 is snapped under the limiting block 312, this structure needs to be kept stable. Therefore, the inclined plate 31 and the outer side of the outer shell 311 are provided with threads (not shown in the figure), and the inner side of the fixing ring 4 is provided with threads (not shown in the figure). The fixing ring 4 is threadedly connected to the inclined plate 31 and the outer shell 311. The inclined plate 31 is evenly provided with four sets, and the inclined plate 31 is provided with a certain inclination.
[0032] After the snap-fit body 22 is snapped under the limit block 312, the operator turns the fixing ring 4 and moves it upward in a threaded connection manner. When the fixing ring 4 moves to the inclined plate 31, the inner diameter of the fixing ring 4 moves upward continuously, which can simultaneously squeeze the inclined plate 31 with a certain inclination inward, press the internal connecting piece 21 to fix its outer side. At the same time, the spring 33 pushes the sliding block 34 upward to snap the snap-fit body 22 under the limit block 312. The elastic force provides an upward pressure to it, thereby completing the effect of stable locking.
[0033] In summary, by aligning the long straight groove 211 below the connecting piece 21 with the position of the locking block 35, the operator can engage it in the long straight groove 211. After moving to the maximum distance, the impeller body 1 is rotated counterclockwise, causing the locking block 35 to move from the connection between the long straight groove 211 and the horizontal groove 212 to the connection between the horizontal groove 212 and the short straight groove 213. Then, the impeller body 1 is lifted upwards, causing the locking block 35 to enter the bottom of the short straight groove 213 to complete the positioning. The locking body 22 is then engaged. After the limiting block 312 is below, the operator turns the fixing ring 4 and moves it upward in a threaded connection. When the fixing ring 4 moves to the inclined plate 31, the inner diameter of the fixing ring 4 moves upward continuously, which can simultaneously squeeze the inclined plate 31 with a certain inclination inward, press the internal connecting piece 21 to fix its outer side. At the same time, the spring 33 pushes the sliding block 34 upward to lock the snap-fit body 22 below the limiting block 312. The elastic force provides an upward pressure to it, thereby completing the effect of stable locking.
[0034] The above description is merely a preferred embodiment of this application. The scope of protection of this application is not limited to the above embodiments. All technical solutions within this concept are within the scope of protection of this application. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of this application should also be considered within the scope of protection of this application.
Claims
1. An impeller stabilizing and locking structure, characterized in that, It includes an impeller body (1) and a connecting part (3), wherein a connecting part (2) is installed below the impeller body (1), and a fixing ring (4) is installed on the connecting part (3); The connecting part (2) includes a connecting piece (21), and a snap-fit body (22) is installed below the connecting piece (21); The connecting part (3) includes a slanted piece (31), a housing (311) is installed below the slanted piece (31), and a limit block (312) is installed inside the slanted piece (31).
2. The impeller stabilizing and locking structure according to claim 1, characterized in that: A fixing post (32) is installed at the central axis inside the outer shell (311). A snap-fit block (35) is installed above the fixing post (32). A long straight groove (211) is provided on the connecting piece (21). A horizontal groove (212) is provided on the left side of the long straight groove (211). A short straight groove (213) is provided below the horizontal groove (212). The long straight groove (211), the horizontal groove (212) and the short straight groove (213) are connected through each other. The snap-fit block (35) moves within the long straight groove (211), the horizontal groove (212), and the short straight groove (213).
3. The impeller stabilizing and locking structure according to claim 1, characterized in that: The connecting piece (21) is provided in four groups, which are evenly distributed in a circular manner, and there is an movable gap (23) between the two groups of connecting pieces (21).
4. The impeller stabilizing and locking structure according to claim 1, characterized in that: The limiting block (312) is provided with a ramp.
5. The impeller stabilizing and locking structure according to claim 2, characterized in that: A spring (33) is installed on the outside of the fixed column (32), and a sliding block (34) is installed on the spring (33).
6. The impeller stabilizing and locking structure according to claim 1, characterized in that: The inclined plate (31) and the outer side of the outer shell (311) are provided with threads, and the inner side of the fixing ring (4) is provided with threads. The fixing ring (4) is threadedly connected to the inclined plate (31) and the outer shell (311). The inclined plate (31) is evenly arranged in four sets, and the inclined plate (31) is provided with a certain inclination.
7. The impeller stabilizing and locking structure according to claim 1, characterized in that: The snap-fit body (22) is trapezoidal in shape.