A close fit taper motor shaft for easy replacement

Abstract

A replaceable, tightly fitting tapered motor shaft includes a first sealing shaft, a positioning shaft, a support shaft, a rotor shaft, a second sealing shaft, and a tapered shaft. The positioning shaft is fixedly connected to one end of the first sealing shaft, and the support shaft is fixedly connected to the other end of the positioning shaft. The other end of the support shaft is detachably connected to one end of the rotor shaft. A toothed bushing is fitted onto the rotor shaft, and the other end of the rotor shaft is also detachably connected to the second sealing shaft. The other end of the second sealing shaft is fixedly connected to one end of the tapered shaft. This invention allows for easy disassembly and replacement of the vulnerable rotor shaft when it is damaged, thanks to springs and a special-shaped groove. Furthermore, the toothed bushing allows for quick installation of the motor rotor. Thus, after wear or damage, only the vulnerable parts need to be repaired and replaced, eliminating the need for complete replacement and reducing costs while improving work efficiency.

Description

Technical Field

[0001] This utility model relates to the field of motor manufacturing, and in particular to a tightly fitting tapered motor shaft that is easy to replace. Background Technology

[0002] The motor shaft is a key component inside the electric motor. Its main function is to transmit the rotational torque generated by the motor to the load and support the rotor. Its processing steps include forging, turning, grinding, drilling and boring, heat treatment and inspection.

[0003] Existing motor shafts are generally made in one piece, that is, by using a single high-strength alloy steel shaft through the above-mentioned process. This method results in high overall strength and good stability, but the shaft used to mount the rotor is prone to damage during operation. Therefore, during maintenance, the entire shaft needs to be removed and replaced, which increases maintenance costs and time. Utility Model Content

[0004] The purpose of this invention is to provide a tightly fitting tapered motor shaft that is easy to replace, replacing the traditional one-piece molded motor shaft, and enabling quick replacement of easily damaged parts.

[0005] The present invention adopts the following technical solution:

[0006] A replaceable, tightly fitting tapered motor shaft includes a first sealing shaft, a positioning shaft, a support shaft, a rotor shaft, a second sealing shaft, and a tapered shaft. The positioning shaft is fixedly connected to one end of the first sealing shaft, and the support shaft is fixedly connected to the other end of the positioning shaft. The other end of the support shaft is detachably connected to one end of the rotor shaft. A toothed bushing is also fitted onto the rotor shaft, and the other end of the rotor shaft is detachably connected to the second sealing shaft. The other end of the second sealing shaft is also fixedly connected to one end of the tapered shaft.

[0007] Preferably, the first sealing shaft and the tapered shaft are further provided with a top hole, and a tapered sleeve is provided in the top hole.

[0008] Preferably, a connecting chamber is formed at one end of the support shaft and the second sealing shaft relative to the rotor shaft. The connecting chamber is cylindrical, and the inner wall of the connecting chamber is formed with a special-shaped groove.

[0009] Preferably, the number of the irregularly shaped card slots is not less than two, and they are arranged symmetrically.

[0010] Preferably, a spring is also fixedly installed in the connecting cavity, one end of which is fixedly connected to the top plate. The top plate is cylindrical and is fitted inside the connecting cavity with a clearance fit to the inner wall of the connecting cavity.

[0011] Preferably, a connector is fixedly provided at the center of both ends of the rotor shaft, and a limiting rod is fixedly provided on the connector, with the axis of the limiting rod always perpendicular to the axial direction of the rotor shaft.

[0012] Preferably, the rotor shaft has circular holes at both ends, and the circular holes cover the connector.

[0013] Preferably, the rotor shaft also has a plurality of strip-shaped protrusions arrayed on it, and the inner wall of the toothed bushing also has a plurality of strip-shaped grooves arrayed on it, with each protrusion engaging with a corresponding groove.

[0014] Preferably, a sealing groove is formed on the upper part of the second sealing shaft, and the number of the sealing grooves is not less than two.

[0015] The beneficial effects of this utility model are as follows:

[0016] This invention allows for easy disassembly and replacement of the rotor shaft when it is damaged, thanks to the spring and the special-shaped slot. Furthermore, the toothed bushing enables quick installation of the motor rotor. Thus, after wear or damage, it is not necessary to replace the entire rotor; only the vulnerable parts need to be repaired and replaced, which reduces costs and improves work efficiency. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the installation of a tightly fitting tapered motor shaft and rotor that is easy to replace;

[0018] Figure 2 A three-dimensional structural diagram of a tightly fitting tapered motor shaft that is easy to replace;

[0019] Figure 3 This is a schematic diagram of a bushing without a toothed sleeve installed.

[0020] Figure 4 A partially exploded view of a tightly fitted tapered motor shaft that is easy to replace;

[0021] Figure 5 This is a plan view of an irregularly shaped card slot;

[0022] Figure 6 A cross-sectional view of a tightly fitting tapered motor shaft that is easy to replace;

[0023] In the figure: First sealing shaft 1, positioning shaft 2, support shaft 3, rotor shaft 4, second sealing shaft 5, tapered shaft 6, toothed bushing 7, rotor 8, top hole 9, tapered sleeve 10, connecting chamber 11, irregular groove 12, spring 13, top plate 14, connector 15, limiting rod 16, round hole 17, protrusion 18, sliding groove 19, and sealing groove 20. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0025] Example 1:

[0026] Reference Figure 1-6 A replaceable, tightly fitting tapered motor shaft is used to mount the rotor and assemble it within the motor housing. From left to right, it includes a first sealing shaft 1, a positioning shaft 2, a support shaft 3, a rotor shaft 4, a second sealing shaft 5, and a tapered shaft 6. The first sealing shaft 1 is fixedly connected to the positioning shaft 2 at one end, and the other end of the positioning shaft 2 is fixedly connected to the support shaft 3. The other end of the support shaft 3 is detachably connected to one end of the rotor shaft 4. A toothed bushing 7 is also fitted on the rotor shaft 4. The other end of the rotor shaft 4 is also detachably connected to the second sealing shaft 5, and the other end of the second sealing shaft 5 is fixedly connected to one end of the tapered shaft 6. In this design, the rotor shaft 4 can be disassembled and replaced, and the motor rotor can be quickly installed through the toothed bushing 7. The toothed bushing 7 can also be replaced, so that if the rotor shaft 4 and the toothed bushing 7 are damaged, they can be quickly replaced without replacing the entire shaft.

[0027] See Figure 6 The first sealing shaft 1 and the tapered shaft 6 are also provided with a top hole 9 inside. A tapered sleeve 10 is provided inside the top hole 9. When installing the shaft and the rotor, the shaft is traditionally installed on the rotor by hydraulic or hammering. This process will damage both ends of the shaft. With this solution, during installation, only the end of the hydraulic push rod needs to be inserted into the tapered sleeve 10. The tapered sleeve 10 is generally made of silicone. In this way, the tapered sleeve 10 can protect the top hole 9, and the top hole 9 also plays a positioning role.

[0028] See Figure 4 The supporting shaft 3 and the second sealing shaft 5 each have a connecting chamber 11 at one end relative to the rotor shaft 4. The connecting chamber 11 is cylindrical, and the inner wall of the connecting chamber 11 has a shaped groove 12. Figure 4 Only a partial schematic diagram of the detachable connection between the support shaft 3 and the rotor shaft 4 is shown. The detachable connection between the second sealing shaft 5 and the rotor shaft 4 is not shown in the diagram, but... Figure 4 The detachable connection method is completely consistent. During installation, simply insert both ends of the rotor shaft 4 into the connecting chamber 11 on the support shaft 3 and the second sealing shaft 5, so that the limiting rod 16 moves along the irregular groove 12 until it is locked through the irregular groove 12.

[0029] See Figure 4-6The number of the irregularly shaped slots 12 is not less than two, and they are symmetrically arranged. The irregularly shaped slots 12 are arc-shaped and are disposed on the inner wall of the connecting chamber 11. Their planar structure is as follows: Figure 5 As shown, this makes the connection more stable. During installation, the limiting rod 16 moves along the irregular groove 12. When it reaches the end of the irregular groove 12, the limiting rod 16 is locked at the end of the irregular groove 12 under the action of the spring 13. In this way, during the rotation, the support shaft 3 and the second sealing shaft 5 connected to it can rotate synchronously.

[0030] See Figure 6 A spring 13 is also fixedly installed inside the connecting chamber 11. One end of the spring 13 is also fixedly connected to the top plate 14. The top plate 14 is cylindrical and is fitted inside the connecting chamber 11. When the connector 15 is inserted, the end will compress the spring 13. This process is a force storage process. The top plate 14 moves with the spring 13 and is in clearance fit with the inner wall of the connecting chamber 11.

[0031] See Figure 6 Connecting heads 15 are fixedly installed at the center of both ends of the rotor shaft 4. Limiting rods 16 are fixedly installed on the connecting heads 15. The limiting rods 16 move together with the connecting heads 15, and the axis of the limiting rods 16 is always perpendicular to the axis of the rotor shaft 4. The two ends of the limiting rods 16 cooperate with the irregular grooves 12, and can move along the irregular grooves 12 during installation and disassembly.

[0032] See Figure 6 The rotor shaft 4 has round holes 17 at both ends. The round holes 17 are used to contact the end edges of the support shaft 3 and the second sealing shaft 5. This prevents the connection from forming a recessed area when locking and unlocking. During disassembly, simply push the shafts at both ends of the rotor shaft 4, i.e., the ends of the support shaft 3 and the second sealing shaft 5, into the round holes 17, and then twist them in the opposite direction to remove the connector 15. The round holes 17 enclose the connector 15.

[0033] The rotor shaft 4 also features an array of multiple strip-shaped protrusions 18, and the inner wall of the toothed bushing 7 features an array of multiple strip-shaped grooves 19. Each protrusion 18 is fitted with a corresponding groove 19. A pusher is required for installation or disassembly because the rotor shaft 4 and the toothed bushing 7 are interference-fitted. This allows for rapid radial disassembly of the worn toothed bushing 7.

[0034] The second sealing shaft 5 has a sealing groove 20, and there are no fewer than two sealing grooves 20. The sealing grooves 20 can cooperate with the sealing ring on the motor housing, so that the sealing effect is better.

[0035] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A replaceable, tightly fitting tapered motor shaft for mounting a rotor, characterized in that, The device includes a first sealing shaft (1), a positioning shaft (2), a support shaft (3), a rotor shaft (4), a second sealing shaft (5), and a tapered shaft (6). The first sealing shaft (1) is fixedly connected to the positioning shaft (2) at one end. The other end of the positioning shaft (2) is fixedly connected to the support shaft (3). The other end of the support shaft (3) is detachably connected to one end of the rotor shaft (4). A toothed bushing (7) is also fitted on the rotor shaft (4). The other end of the rotor shaft (4) is also detachably connected to the second sealing shaft (5). The other end of the second sealing shaft (5) is also fixedly connected to one end of the tapered shaft (6).

2. The easily replaceable, tightly fitting tapered motor shaft according to claim 1, characterized in that: The first sealing shaft (1) and the tapered shaft (6) are also provided with a top hole (9), and a tapered sleeve (10) is provided in the top hole (9).

3. The easily replaceable, tightly fitting tapered motor shaft according to claim 1, characterized in that: The support shaft (3) and the second sealing shaft (5) each have a connecting chamber (11) at one end relative to the rotor shaft (4). The connecting chamber (11) is cylindrical, and the inner wall of the connecting chamber (11) has an irregular groove (12), wherein the irregular groove (12) is arc-shaped.

4. The easily replaceable, tightly fitting tapered motor shaft according to claim 3, characterized in that: The number of irregularly shaped card slots (12) is not less than two, and they are arranged symmetrically.

5. The easily replaceable, tightly fitting tapered motor shaft according to claim 3, characterized in that: A spring (13) is also fixedly installed in the connecting chamber (11). One end of the spring (13) is also fixedly connected to the top plate (14). The top plate (14) is cylindrical and is fitted in the connecting chamber (11) with a clearance fit to the inner wall of the connecting chamber (11).

6. The easily replaceable, tightly fitting tapered motor shaft according to claim 1, characterized in that: Connecting heads (15) are fixedly installed at the center of both ends of the rotor shaft (4). A limiting rod (16) is fixedly installed on the connecting head (15), and the axis of the limiting rod (16) is always perpendicular to the axis of the rotor shaft (4).

7. The easily replaceable, tightly fitting tapered motor shaft according to claim 6, characterized in that: The rotor shaft (4) also has round holes (17) at both ends, and the round holes (17) cover the connector (15).

8. The easily replaceable, tightly fitting tapered motor shaft according to claim 1, characterized in that: The rotor shaft (4) also has a plurality of strip protrusions (18) arranged in an array, and the inner wall of the toothed bushing (7) also has a plurality of strip grooves (19) arranged in an array, and each protrusion (18) cooperates with the corresponding groove (19).

9. The easily replaceable, tightly fitting tapered motor shaft according to claim 1, characterized in that: The second sealing shaft (5) has a sealing groove (20) on its upper surface, and the number of the sealing grooves (20) is not less than two.

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