Motor spindle with adjustable length

Abstract

The application discloses a length-adjustable motor spindle, which comprises a spindle body, two bosses arranged on the outer side of the spindle body, a hollow structure of the spindle body, a movable shaft arranged in the spindle body, a plurality of first platform portions arranged at one end of the spindle body, a plurality of second platform portions arranged at the other end of the spindle body, a first locking bolt arranged at the first platform portions and capable of fixing the relative position of the movable shaft and the spindle body, an axle extension end arranged at the end of the movable shaft, and a counterweight end arranged at the end of the spindle body away from the axle extension end. The motor spindle has the movable shaft, the movable shaft can be pulled out from the inside of the spindle body and fixed according to requirements, so that the length of the whole spindle can be changed to adapt to the installation requirements of different motors. When the movable shaft is extended, the counterweight end can be adjusted and fixed according to the length of the movable shaft, so that the spindle is dynamically balanced and the stability of the spindle is improved.

Description

Technical Field

[0001] This utility model relates to the field of motor spindles, and more specifically, to a motor spindle with adjustable length. Background Technology

[0002] The motor spindle is a core functional component of modern equipment. The motor rotor is directly mounted on the spindle and is directly driven by a built-in high-speed motor, achieving extremely high rotational accuracy and operating efficiency. The motor spindle can operate stably at extremely high speeds and provides powerful cutting torque. Motors are widely used in CNC machine tools, machining centers, precision grinding machines, and other fields.

[0003] Traditional motor spindles are typically rigid shafts forged or machined from a single piece, with fixed lengths and structures. This results in poor adaptability to diverse application scenarios. In industrial applications, motors need to drive a wide variety of equipment, such as different pumps, fans, and machine tool spindles. The interface locations and mounting base dimensions of these driven devices vary. For fixed-length motor spindles, if the motor's mounting space does not match the spindle length, the spindle cannot be installed. Utility Model Content

[0004] The present invention aims to overcome the defects of the prior art and provide a motor spindle with adjustable length.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an adjustable-length motor spindle, comprising a spindle body, two bosses on the outer side of the spindle body, the spindle body being a hollow structure, a movable shaft disposed within the spindle body, one end of the spindle body having multiple first platform portions, and the other end having multiple second platform portions, a first locking bolt for fixing the relative position of the movable shaft and the spindle body being disposed at the first platform portion, a shaft extension end being disposed at the end of the movable shaft, a counterweight end being disposed at the end of the spindle body away from the shaft extension end, a second locking bolt for fixing the relative position of the counterweight end and the spindle body being disposed at the second platform portion, a limit rod being disposed at the counterweight end, a central column being disposed at the end of the movable shaft near the counterweight end, multiple radial connecting ribs connecting the central column and the movable shaft, and a limit hole cooperating with the limit rod being disposed at the central column.

[0006] Furthermore, the outer circumferential surface of the movable shaft and the outer circumferential surface of the counterweight end are provided with multiple limiting ribs, and the inner circumferential surface of the main shaft body has a limiting groove that cooperates with the limiting ribs.

[0007] Thus, both the movable shaft and the counterweight end can slide within the main shaft body, and the movable shaft and the counterweight end can be limited.

[0008] Furthermore, multiple radial connecting ribs are evenly distributed radially between the central column and the movable shaft.

[0009] This makes the connection between the central column and the movable shaft more secure.

[0010] Furthermore, the first platform portion has a first fixing through hole that mates with a first locking bolt, the first locking bolt passing through the first fixing through hole and abutting against the movable shaft.

[0011] This ensures a stable connection between the movable shaft and the main shaft body.

[0012] Furthermore, the second platform portion has a second fixing through hole that mates with the second locking bolt, the second locking bolt passing through the second fixing through hole and abutting against the counterweight end.

[0013] This ensures a stable connection between the counterweight end and the main shaft body.

[0014] Furthermore, the cross-section of the limiting rod is hexagonal, and the shape of the limiting hole is consistent with the shape of the limiting rod.

[0015] This prevents relative rotation between the counterweight end and the movable shaft, further improving the stability of the motor spindle.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] 1. The motor spindle of this application is equipped with a movable shaft. The movable shaft can be partially pulled out from inside the spindle and fixed as needed, thereby changing the length of the entire spindle to adapt to different motor installation requirements.

[0018] 2. In the motor spindle of this application, when the movable shaft extends, the counterweight end can be adjusted and fixed according to the length of the extended movable shaft, thereby dynamically balancing the spindle and improving its stability.

[0019] 3. The motor spindle of this application has a limit rod and a limit hole that cooperate to ensure that the counterweight end itself will not rotate relative to the movable shaft, thus further ensuring the stability of the balance structure. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the motor spindle;

[0021] Figure 2 This is a magnified view of region A;

[0022] Figure 3 This is a magnified view of region B.

[0023] Figure 4 This is a schematic diagram showing the separation of components;

[0024] Figure 5 This is a magnified view of region C;

[0025] Figure 6 This is a magnified view of region D.

[0026] Explanation of reference numerals in the attached drawings: Main spindle body 1; Boss 1.1; First platform part 1.2; Second platform part 1.3; Limiting groove 1.4; Movable shaft 2; Limiting rib 2.1; First locking bolt 3; Shaft extension end 4; Counterweight end 5; Second locking bolt 6; Limiting rod 7; Center column 8; Radial connecting rib 8.1; Limiting hole 8.2. Detailed Implementation

[0027] 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.

[0028] This utility model provides, for example Figures 1-6 The diagram shows an adjustable-length motor spindle, comprising a spindle body 1. Two bosses 1.1 are provided on the outer side of the spindle body 1. The spindle body 1 is a hollow structure. A movable shaft 2 is disposed inside the spindle body 1. One end of the spindle body 1 has multiple first platform portions 1.2, and the other end has multiple second platform portions 1.3. A first locking bolt 3 is provided at the first platform portion 1.2 to fix the relative position of the movable shaft 2 and the spindle body 1. A shaft extension end 4 is provided at the end of the movable shaft 2. A counterweight end 5 is provided at the end of the spindle body 1 away from the shaft extension end 4. A second locking bolt 6 is provided at the second platform portion 1.3 to fix the relative position of the counterweight end 5 and the spindle body 1. A limit rod 7 is provided at the counterweight end 5. A central column 8 is provided at the end of the movable shaft 2 near the counterweight end 5. Multiple radial connecting ribs 8.1 connect the central column 8 and the movable shaft 2. A limiting hole 8.2 is provided at the central column 8 to cooperate with the limit rod 7.

[0029] Multiple limiting ribs 2.1 are provided on the outer circumferential surface of the movable shaft 2 and the outer circumferential surface of the counterweight end 5. The inner circumferential surface of the main shaft body 1 has a limiting groove 1.4 that mates with the limiting ribs 2.1. Multiple radial connecting ribs 8.1 are radially and evenly distributed between the central column 8 and the movable shaft 2. The first platform portion 1.2 has a first fixing through hole that mates with the first locking bolt 3. The first locking bolt 3 passes through the first fixing through hole and abuts against the movable shaft 2. The second platform portion 1.3 has a second fixing through hole that mates with the second locking bolt 6. The second locking bolt 6 passes through the second fixing through hole and abuts against the counterweight end 5. The limiting rod 7 has a hexagonal cross-section, and the shape of the limiting hole 8.2 is consistent with the shape of the limiting rod 7.

[0030] Working principle: The motor spindle of this application has a movable shaft that can extend and retract relative to the spindle body and be fixed, thereby changing the overall length of the spindle and adapting to the installation requirements of different motors, greatly improving the spindle's versatility. During installation, bearings are mounted via a boss, and the extended end of the movable shaft is used to connect the load.

[0031] When adjusting the length of the motor spindle in this application, firstly, use a suitable tool to loosen the first locking bolt located on the first platform section, thereby loosening the fixation on the movable shaft. Then, hold the shaft extension end and smoothly pull it outward from the spindle body. At the same time, loosen the second locking bolt and adjust the length of the counterweight end extension. After the overall length of the motor spindle is adjusted to the required length, tighten the first locking bolt to fix the movable shaft, and simultaneously tighten the second locking bolt to fix the counterweight end. Furthermore, due to the cooperation between the limiting ribs at the movable shaft and the counterweight end and the limiting grooves at the spindle body, as well as the cooperation between the limiting rod and the center column, the movable shaft and the counterweight end will not rotate in the circumferential direction, thereby improving the overall stability of the motor spindle.

[0032] Although the present invention has been illustrated and described with reference to preferred embodiments, those skilled in the art should understand that various changes and modifications can be made to the present invention without departing from the scope defined by the claims.

Claims

1. A motor spindle with adjustable length, characterized in that, The device includes a main spindle body with two bosses on its outer side. The main spindle body is hollow and contains a movable shaft. One end of the main spindle body has multiple first platform portions, and the other end has multiple second platform portions. The first platform portions are provided with first locking bolts that can fix the relative position of the movable shaft and the main spindle body. The end of the movable shaft is provided with a shaft extension end. The end of the main spindle body away from the shaft extension end is provided with a counterweight end. The second platform portions are provided with second locking bolts that can fix the relative position of the counterweight end and the main spindle body. The counterweight end is provided with a limit rod. The end of the movable shaft near the counterweight end is provided with a central column. Multiple radial connecting ribs connect the central column and the movable shaft. The central column has a limit hole that cooperates with the limit rod.

2. The adjustable-length motor spindle according to claim 1, characterized in that, The outer circumferential surface of the movable shaft and the outer circumferential surface of the counterweight end are provided with multiple limiting ribs, and the inner circumferential surface of the main shaft body has a limiting groove that cooperates with the limiting ribs.

3. The adjustable-length motor spindle according to claim 1, characterized in that, Multiple radial connecting ribs are evenly distributed radially between the central column and the movable shaft.

4. The adjustable-length motor spindle according to claim 1, characterized in that, The first platform portion has a first fixing through hole that mates with a first locking bolt, the first locking bolt passing through the first fixing through hole and abutting against the movable shaft.

5. The adjustable-length motor spindle according to claim 1, characterized in that, The second platform portion has a second fixing through hole that mates with a second locking bolt, the second locking bolt passing through the second fixing through hole and abutting against the counterweight end.

6. The adjustable-length motor spindle according to claim 1, characterized in that, The limiting rod has a hexagonal cross-section, and the limiting hole has the same shape as the limiting rod.

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