Tapered locking motor extension shaft assembly

Abstract

This utility model relates to the field of water pump application technology, specifically to a tapered locking motor extension shaft device, including a motor extension shaft and a motor output shaft. A locking component is sleeved on the outer wall of the motor extension shaft. An axial mounting hole is provided at one end of the motor extension shaft. The outer diameter of the motor extension shaft gradually increases from one end to the other to form a tapered shape. The motor output shaft is inserted into the mounting hole. The inner wall of the locking component cooperates with the outer wall of the motor extension shaft. The locking component is sleeved on the motor extension shaft, and the tapered shape locks and fixes the motor output shaft and the motor extension shaft. The locking component is a water-blocking ring, and the outer wall of the water-blocking ring is provided with annular water grooves at intervals. This utility model has a clever structure, few parts, high rotational accuracy, and is easy to disassemble.

Description

Technical Field

[0001] This utility model relates to the field of water pump application technology, specifically to a tapered locking motor extension shaft device. Background Technology

[0002] There are two common methods for connecting the motor extension shaft and the motor output shaft. One method uses a clearance fit between the motor extension shaft and the motor output shaft, with set screws used to fix the extension shaft to the output shaft in the circumferential direction. This method is easy to disassemble, but requires high machining precision. To ensure even lower rotational accuracy, high precision tolerances are used, resulting in poor rotational accuracy. Because set screws are used in the circumferential direction, the clearance between the motor extension shaft and the motor output shaft will be biased to one side, causing problems such as poor rotational accuracy and large runout. The second method uses an interference fit or even an interference fit between the motor extension shaft and the motor output shaft. This method has relatively high rotational accuracy, but it is very difficult to disassemble. Summary of the Invention

[0003] The purpose of this invention is to address the shortcomings of existing technologies and provide a tapered locking motor extension shaft device with an ingenious structure, few parts, high rotational accuracy, and easy disassembly.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A tapered locking motor extension shaft device includes a motor extension shaft and a motor output shaft. The device is characterized by: a locking member sleeved on the outer wall of the motor extension shaft; an axial mounting hole at one end of the motor extension shaft; and a tapered outer diameter that gradually increases from one end to the other. The motor output shaft is inserted into the mounting hole. The inner wall of the locking member mates with the outer wall of the motor extension shaft. The locking member, sleeved on the motor extension shaft, locks and fixes the motor output shaft to the motor extension shaft via the tapered shape. Simultaneously, the locking member compresses the motor extension shaft, causing the mounting hole to deform and adhere tightly to the outer wall of the motor output shaft.

[0005] The outer diameter of the motor output shaft of this invention is smaller than the inner diameter of the mounting hole to facilitate assembly and disassembly.

[0006] The locking component described in this utility model is a water-blocking ring. The inner wall of the water-blocking ring is provided with a taper that cooperates with the motor extension shaft. By fitting the water-blocking ring onto the motor extension shaft and clamping it with the taper, the motor output shaft and the motor extension shaft are fixedly connected. At the same time, the water-blocking ring prevents water from entering the motor.

[0007] The outer wall of the water-blocking ring of this invention is provided with annular water grooves at intervals, so as to throw out the water that falls on the outer wall of the water-blocking ring through the annular water grooves.

[0008] The motor extension shaft of this utility model includes a left section and a right section. The right end of the left section is fixedly connected to the right section. The right end of the right section is provided with a mounting hole. The outer diameter of the right section gradually increases from right to left to form a taper. The taper of the outer wall of the right section is 1°-3°, so as to facilitate disassembly and assembly through the taper connection.

[0009] The right section of the motor extension shaft of this utility model is deformable, and the material of the right section of the motor extension shaft is 42CrMo steel, 3Cr13 stainless steel, or 304 stainless steel.

[0010] The outer wall of the right section of the motor extension shaft of this utility model has a notch from right to left. The notch is connected to the mounting hole so that when the motor extension shaft is squeezed by the water baffle ring, the notch is squeezed and the inner diameter of the mounting hole is reduced, thus gripping the motor output shaft.

[0011] This utility model, due to the above-mentioned structure, has the advantages of ingenious structure, few parts, high rotational accuracy, and convenient disassembly. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model.

[0013] Reference numerals: 1. Motor extension shaft; 2. Motor output shaft; 3. Locking element; 4. Annular water tank; 5. Left section of motor extension shaft; 6. Right section of motor extension shaft; 7. Impeller; 8. Motor. Detailed Implementation

[0014] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0015] A tapered locking motor extension shaft device includes a motor extension shaft 1 and a motor output shaft 2. The device is characterized by: a locking member 3 fitted onto the outer wall of the motor extension shaft 1; an axial mounting hole at one end of the motor extension shaft 1; and a tapered outer diameter that gradually increases from one end to the other. The motor output shaft 2 is inserted into the mounting hole. The inner wall of the locking member 3 mates with the outer wall of the motor extension shaft 1. The locking member 3, fitted onto the motor extension shaft 1, locks and fixes the motor output shaft 2 to the motor extension shaft 1 via the tapered shape. Simultaneously, the locking member compresses the motor extension shaft, causing the mounting hole of the motor extension shaft to deform and adhere tightly to the outer wall of the motor output shaft.

[0016] The outer diameter of the motor output shaft 2 of this invention is smaller than the inner diameter of the mounting hole to facilitate assembly and disassembly.

[0017] The locking component 3 of this utility model is a water-blocking ring. The inner wall of the water-blocking ring is provided with a taper that cooperates with the motor extension shaft 1. The water-blocking ring is fitted onto the motor extension shaft and clamped by the taper to fix the motor output shaft to the motor extension shaft. At the same time, the water-blocking ring prevents water from entering the motor.

[0018] The outer wall of the water-blocking ring of this invention is provided with annular water grooves 4 at intervals, so as to throw out the water that falls on the outer wall of the water-blocking ring through the annular water grooves.

[0019] The motor extension shaft 1 of this utility model includes a left section 5 and a right section 6. The right end of the left section 5 is fixedly connected to the right section 6. The right end of the right section 6 has a mounting hole. The outer diameter of the right section 6 gradually increases from right to left to form a taper. The taper of the outer wall of the right section 6 is 1°-3°, so as to facilitate disassembly and assembly through the taper connection.

[0020] The right section 6 of the motor extension shaft of this utility model is deformable, and the material of the right section 6 of the motor extension shaft is 42CrMo steel, 3Cr13 stainless steel or 304 stainless steel.

[0021] The outer wall of the right section 6 of the motor extension shaft of this utility model has a notch from right to left. The notch is connected to the mounting hole so that when the motor extension shaft is squeezed by the water baffle ring, the notch is squeezed and the inner diameter of the mounting hole is reduced, thus tightening the motor output shaft.

[0022] As attached Figure 1The motor extension shaft 1 includes a left section 5 and a right section 6. The pump cover, mechanical seal, and impeller 7 are mounted on the outer wall of the left section 5, and the installation method is the same as in existing technology, so it will not be described in detail. The outer wall of the right section 6 is tapered. A motor 8 is located on the right side of the motor extension shaft 1. An axial mounting hole is provided at the right end of the right section 6. The motor output shaft 2 is inserted into the mounting hole with a clearance fit. The outer diameter of the right section 6 gradually increases from right to left. The inner diameter of the water baffle ring... The inner diameter of the baffle ring gradually increases from right to left, in conjunction with the right section 6 of the motor extension shaft. This means the baffle ring and the motor extension shaft 1 have a matching taper. Before use, first install the pump cover, mechanical seal, and impeller 7 on the left end of the motor extension shaft 1. Then, pass the baffle ring through the right side of the right section 6 of the motor extension shaft and fit it onto the right section 6. Insert the motor output shaft 2 of the motor 8 into the mounting hole. Then, pull the baffle ring to the left; the baffle ring moves axially to the left, and the outer diameter of the motor extension shaft 1 gradually increases to the left. The inner wall of the water-retaining ring gradually tightens and secures itself to the outer wall of the motor extension shaft 1 via a tapered design. Simultaneously, the water-retaining ring presses against the right section 6 of the motor extension shaft, causing it to deform under external force. This reduces the inner diameter of the mounting hole, gripping the motor output shaft 2 and fixing it to the motor extension shaft 1. When disassembly is required, the water-retaining ring is tapped to the right, causing it to move to the right. After the external force disappears, the right section 6 of the motor extension shaft returns to its original shape, the inner diameter of the mounting hole returns to its original size, and the motor output shaft 2 exits from the mounting hole. The design allows for easy disassembly. The novel structure features a small taper on the outer wall of the motor extension shaft 1, ranging from 1° to 3°, employing a Morse taper. This facilitates quick assembly and disassembly of the water-retaining ring from the motor extension shaft 1 via the taper. Once the water-retaining ring is secured to the motor extension shaft 1 by the taper, it will not disengage, ensuring a stable connection between the motor output shaft 2 and the motor extension shaft 1. The motor output shaft 2 can drive the motor extension shaft 1 to rotate with high rotational accuracy. Furthermore, this design has fewer components, making assembly and disassembly convenient and maintenance quick.

[0023] This utility model, due to the above-mentioned structure, has the advantages of ingenious structure, few parts, high rotational accuracy, and convenient disassembly.

Claims

1. A tapered locking motor extension shaft device, comprising a motor extension shaft (1) and a motor output shaft (2), characterized in that: The outer wall of the motor extension shaft (1) is fitted with a locking member (3). One end of the motor extension shaft (1) is provided with an axial mounting hole. The outer diameter of the motor extension shaft (1) gradually increases from one end to the other end to form a taper. The motor output shaft (2) is inserted into the mounting hole. The inner wall of the locking member (3) cooperates with the outer wall of the motor extension shaft (1). The locking member (3) is fitted on the motor extension shaft (1) and the taper locks and fixes the motor output shaft (2) and the motor extension shaft (1).

2. The tapered locking motor extension shaft device according to claim 1, characterized in that: The outer diameter of the motor output shaft (2) is smaller than the inner diameter of the mounting hole.

3. A tapered locking motor extension shaft device according to claim 1 or 2, characterized in that: The locking component (3) is a water-blocking ring.

4. The tapered locking motor extension shaft device according to claim 3, characterized in that: The outer wall of the water-blocking ring is provided with annular water grooves (4) at intervals.

5. A tapered locking motor extension shaft device according to claim 1, 2, or 4, characterized in that: The motor extension shaft (1) includes a left section (5) and a right section (6). The right end of the left section (5) is fixedly connected to the right section (6). The right end of the right section (6) is provided with a mounting hole. The outer diameter of the right section (6) gradually increases from right to left to form a taper.

6. The tapered locking motor extension shaft device according to claim 5, characterized in that: The taper of the outer wall of the right section (6) of the motor extension shaft is 1°-3°.

7. The tapered locking motor extension shaft device according to claim 5, characterized in that: The right section (6) of the motor extension shaft is deformable.

8. The tapered locking motor extension shaft device according to claim 7, characterized in that: The right section (6) of the motor extension shaft is made of 42crmo steel, 3cr13 stainless steel, or 304 stainless steel.

9. A tapered locking motor extension shaft device according to claim 5, characterized in that: The outer wall of the right section (6) of the motor extension shaft has a notch from right to left, and the notch is connected to the mounting hole.

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