Silica gel shaft sleeve cantilever rotor structure

Abstract

The utility model discloses a cantilever rotor structure of a silica gel shaft sleeve. The cantilever rotor structure comprises a main shaft, a magnet arranged on the main shaft, the silica gel shaft sleeve sleeved on the main shaft, and a first bearing and a second bearing which are sleeved on the main shaft and are respectively positioned at two end parts of the silica gel shaft sleeve. According to the utility model, the silica gel shaft sleeve is adopted between the bearings of the rotor as a supporting carrier of the bearings, so that the silica gel shaft sleeve is mainly used for eliminating metal friction sound and other jitter noise generated by a bearing gap, and meanwhile, vibration and the like in high-speed rotation of the rotor can be eliminated. And the silica gel shaft sleeve assembly is adopted to eliminate bearing ball gaps, the silica gel shaft sleeve is formed by a mold, the end face is ensured to be very flat through the mold, the material formula is fixed after test verification, and parts with stable sizes and characteristics can be obtained.

Description

TECHNICAL FIELD

[0001] The utility model relates to motor rotor technical field especially relates to a silica gel shaft sleeve cantilever rotor structure. BACKGROUND

[0002] The conventional existing high-speed brushless digital motor uses spring for the cantilever rotor, which is prone to vibration or metal friction during the operation of the motor, and generates high-decibel similar high-frequency sound wave sound or sharp chirping sound and other undesirable sound problems.

[0003] In the design and production of the existing high-speed motor, the spring cantilever rotor structure is mainly adopted, which has the main disadvantage that the length and yield of the spring are extremely unstable due to the influence of the current machining precision, and the spring end face is difficult to be ground flat due to the special structure of the spring. Therefore, the stress on the bearing is uneven on the circumference of the outer ring and the inner ring during assembly, and the difference between the two different springs is large. Therefore, the consistency of the sound after the motor assembly is poor, and the one-time qualification rate is low. SUMMARY

[0004] The utility model aims at providing a silica gel shaft sleeve cantilever rotor structure, which solves the problem of high-decibel similar high-frequency sound wave sound or sharp chirping sound and other undesirable sound problems caused by the use of spring in the conventional cantilever rotor.

[0005] To solve the above technical problems, the utility model adopts the following technical scheme:

[0006] The utility model provides a silica gel shaft sleeve cantilever rotor structure, which comprises a main shaft, a magnet arranged on the main shaft, a silica gel shaft sleeve sleeved on the main shaft, a first bearing and a second bearing sleeved on the main shaft and located at the two ends of the silica gel shaft sleeve respectively.

[0007] Further, the center of the silica gel shaft sleeve is a hollow cavity matched with the outer diameter of the main shaft; variable-diameter grooves matched with the bearing support of the first bearing and the second bearing are formed at the two ends of the silica gel shaft sleeve respectively; the end face of the variable-diameter groove is in contact with the outer ring support of the bearing, and a gap is reserved with the inner ring of the bearing.

[0008] Compared with the prior art, the utility model has the beneficial technical effects:

[0009] In the utility model, the silica gel shaft sleeve is used as the bearing support carrier between the rotor bearings, which can eliminate the metal friction sound and other shaking noises caused by the bearing gap, and can also eliminate the vibration during high-speed rotation of the rotor. The silica gel shaft sleeve is assembled to eliminate the bearing ball gap. The end face is very smooth through the mold, and the material formula is fixed after test verification, so that the parts with stable size and characteristics can be obtained. BRIEF DESCRIPTION OF DRAWINGS

[0010] The utility model is further described below in combination with the drawings.

[0011] Figure 1 It is a main structure schematic view of the utility model silica gel shaft sleeve cantilever rotor structure;

[0012] Figure 2 It is an explosion schematic view of the utility model silica gel shaft sleeve cantilever rotor structure;

[0013] Figure 3 It is a silica gel shaft sleeve structure schematic view in the utility model silica gel shaft sleeve cantilever rotor structure;

[0014] Figure 4 It is a schematic view of prior art spring shaft sleeve cantilever rotor structure.

[0015] Mark explanation: 100, magnet; 200, main shaft; 300, first bearing; 400, silica gel shaft sleeve; 401, hollow cavity; 402, variable diameter groove; 500, second bearing; 600, spring. DETAILED DESCRIPTION

[0016] The utility model discloses a silica gel shaft sleeve cantilever rotor structure, including main shaft 200, install the magnet 100 on the main shaft 200, the silica gel shaft sleeve 400 of setting in the main shaft 200, and the first bearing 300 and the second bearing 500 of setting in the main shaft 200 and being located at the both ends of silica gel shaft sleeve 400 respectively.

[0017] Specific implementation, as Figure 2 And Figure 3 The center of silica gel shaft sleeve 400 is the hollow cavity 401 that is adapted with the outer diameter of main shaft 200, and the variable diameter groove 402 that is adapted with the support of first bearing 300 and second bearing 500 is set on both ends of silica gel shaft sleeve 400 respectively, wherein the end face of variable diameter groove 402 is in contact with the outer ring support of bearing, and there is a gap reserved with the inner ring of bearing.

[0018] In the embodiment, the variable diameter groove 402 of both ends of silica gel shaft sleeve 400 is used to support the outer ring of bearing, and the flatness of end face is good, and the stress is uniform when supporting, and the recess structure of variable diameter groove 402 can also give way to the inner ring of bearing, and the inner ring of bearing runs smoothly.

[0019] In the embodiment, by comparing Figure 1 And Figure 4 Prior art, in the embodiment, the silica gel shaft sleeve 400 is replaced by spring 600.

[0020] In this embodiment, instead of using a conventional spring design, silica gel sleeves (silica gel material, with sound absorption and shock absorption effect) are used between the rotor bearings as the bearing support carrier (see below Figures 1-3 Structural design), which can eliminate metal friction sound and other jitter noise caused by bearing gap, and can also eliminate vibration during high-speed rotation of the rotor. Our team first theoretically analyzes, and after a large number of experiments, the reliability and stability of the structure have been verified.

[0021] To solve this problem, in this embodiment, silica gel sleeves are used to eliminate the bearing ball gap. The end face of the silica gel sleeve is very smooth through the mold, and the material formula is fixed after testing, so that parts with stable size and characteristics can be obtained. Our team has solidified the relevant technical parameters through repeated experiments and tests, and has developed a rotor structure without spring cantilever (or it can be called silica gel sleeve cantilever rotor structure). The sound of the rotor after being installed in the motor is very soft, and the consistency is very good.

[0022] The above embodiments only describe the preferred mode of the present application, and do not limit the scope of the present application. Without departing from the design spirit of the present application, various modifications and improvements to the technical solutions of the present application made by those skilled in the art shall fall within the protection scope determined by the claims of the present application.

Claims

1. A silicon rubber bushing cantilevered rotor construction, characterized by: The application relates to a magnetic motor, which comprises a main shaft (200), a magnet (100) arranged on the main shaft (200), a silica gel sleeve (400) sleeved on the main shaft (200), a first bearing (300) and a second bearing (500) respectively arranged at two ends of the silica gel sleeve (400) and sleeved on the main shaft (200).

2. The silica gel bushing cantilever rotor structure according to claim 1, characterized in that: The center of the silica gel sleeve (400) is a hollow cavity (401) matched with the outer diameter of the main shaft (200); Variable-diameter grooves (402) matched with the bearings are arranged at two ends of the silica gel sleeve (400); The end surface of the variable-diameter groove (402) is in contact with the outer ring of the bearing, and a gap is reserved between the end surface and the inner ring of the bearing.

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