Brushless motor without rear end cover

Abstract

The utility model provides a brushless motor without a rear end cover, which comprises the following structures: an integrated end cover, a stator fixedly arranged on the inner wall of the integrated end cover, and a rotor assembly arranged in the middle of the integrated end cover; a front rolling bearing and a rear rolling bearing are assembled on the front side and the rear side of the middle of the crankshaft respectively, the integrated end cover, the front rolling bearing and the rear rolling bearing form a crankshaft installation structure, the front rolling bearing and the rear rolling bearing are installed on the front side and the rear side of the middle of the crankshaft, and the rear end of the crankshaft is assembled with the rotor assembly. The front end of the motor shaft is used for assembling a load, compared with a conventional brushless motor which is provided with a bearing support on each of a front end cover and a rear end cover, the front rolling bearing and the rear rolling bearing are respectively arranged in the middle of the integrated end cover and are used for installing and supporting the motor shaft, the cantilever of the rotor assembly is shortened as much as possible through the structural design, and vibration is avoided; and meanwhile, the structural design without a rear end cover of the product is realized.

Description

Technical Field

[0001] The utility model mainly relates to the technical field of brushless motors, and particularly relates to a brushless motor without a rear end cover. Background Art

[0002] The current structural composition of a brushless motor mainly includes front and rear end covers, a rotor, a stator, a machine shaft, etc. Considering that the front and rear end covers provide installation support for the machine shaft, the processing requirements for the machine shaft installation hole positions on the front and rear end covers are relatively high, and the production cost is relatively high.

[0003] The inventor proposes a brushless motor without a rear end cover. By setting double bearing installation points of a front rolling bearing and a rear rolling bearing in the middle of the integrated end cover, without the cooperation of the front and rear end covers, the cantilever length of the machine shaft is greatly shortened, the height of the equipment is reduced, and at the same time, the production cost of the equipment is reduced. Content of the Utility Model

[0004] 1. Technical problems to be solved by the utility model:

[0005] The utility model provides a brushless motor without a rear end cover, which solves the technical problems that the cooperation of the front and rear end covers in the existing equipment provides installation support for the machine shaft, and the processing requirements for the installation points are relatively high and the production cost is large.

[0006] 2. Technical solutions:

[0007] To achieve the above object, the technical solutions provided by the utility model are as follows: A brushless motor without a rear end cover includes the following structures:

[0008] An integrated end cover, the inner wall of the integrated end cover is fixedly provided with a stator, and a rotor assembly is arranged inside the rear end of the integrated end cover.

[0009] A machine shaft, a front rolling bearing and a rear rolling bearing are respectively assembled on the front and rear sides of the middle part of the machine shaft.

[0010] Further, the front and rear sides of the middle part of the integrated end cover are respectively movably connected to the outer sides of the front rolling bearing and the rear rolling bearing, and weight-reducing and heat-dissipating holes are fixedly arranged on the surface of the integrated end cover.

[0011] Further, installation bolts are arranged on the outer side of the stator, and the stator is fixed in the integrated end cover by the installation bolts.

[0012] Further, the middle part of the rotor assembly is fixedly connected to the rear end of the machine shaft, and a front end plate and a rear end plate are respectively fixedly arranged at the front and rear ends of the rotor assembly.

[0013] Further, a front snap ring and a rear snap ring are respectively clamped at the front and rear ends of the machine shaft. The outer side of the front snap ring is movably clamped with the middle part of the integrated end cover. The front side of the rear snap ring abuts against the rear side of the rotor assembly. The middle part of the machine shaft is movably connected with the middle part of the integrated end cover.

[0014] 3. Beneficial effects:

[0015] Adopting the technical solution provided by the present utility model, compared with the prior art, it has the following beneficial effects:

[0016] The present utility model provides a brushless motor without a rear end cover, and a machine shaft installation structure composed of an integrated end cover, a front rolling bearing and a rear rolling bearing. The front rolling bearing and the rear rolling bearing are installed at the front and rear of the middle part of the machine shaft. The rear end of the machine shaft is assembled with the rotor assembly, and the front end of the machine shaft is used for the assembly of the load. Compared with the conventional brushless motor with a bearing support arranged on each of the front and rear end covers, in this product, the front rolling bearing and the rear rolling bearing are respectively arranged in the middle part of the integrated end cover for the installation and support of the machine shaft. This structural design tries to shorten the cantilever of the rotor assembly, avoid vibration, and at the same time realize the structural design of the brushless motor without a rear end cover;

[0017] The present utility model provides a brushless motor without a rear end cover. The front snap ring completes the assembly of the machine shaft and the front rolling bearing on the integrated end cover. Through the structural combination of the front rolling bearing and the rear rolling bearing, the design of the rear end cover is cancelled, reducing the height dimension of the equipment, reducing the production cost of the equipment, shortening the cantilever length of the machine shaft, and avoiding the occurrence of vibration at the end of the machine shaft and displacement of the rotor assembly;

[0018] Parts not involved in this device are the same as those in the prior art or can be realized by using the prior art. Description of the drawings

[0019] Figure 1 is a three-dimensional view of the structure of the present utility model;

[0020] Figure 2 is a half-sectional three-dimensional view of the integrated end cover structure of the present utility model;

[0021] Figure 3 is a half-sectional three-dimensional view of the integrated end cover structure of the present utility model;

[0022] Figure 4 is a half-sectional three-dimensional view of the integrated end cover structure of the present utility model.

[0023] Reference numerals:

[0024] Integrated end cover - 1;

[0025] Stator - 2; Mounting bolt - 21;

[0026] Rotor assembly - 3; Front end plate - 31; Rear end plate - 32;

[0027] Front rolling bearing - 4;

[0028] Rear rolling bearing - 5;

[0029] Machine shaft - 6; Front snap ring - 61; Rear snap ring - 62. Detailed implementation mode

[0030] For the convenience of understanding the present utility model, the present utility model will be described more comprehensively below with reference to the relevant drawings. Several embodiments of the present utility model are given in the drawings. However, the present utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present utility model more thorough and comprehensive.

[0031] It should be noted that when an element is referred to as "fixedly provided on" another element, it can be directly on the other element or there may also be an intermediate element; when an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time; the terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for the purpose of illustration.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present utility model belongs; the terms used in the description of the present utility model in this specification are only for the purpose of describing specific embodiments and are not intended to limit the present utility model; the term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0033] Referring to the attached Figures 1-4 , the present utility model provides a brushless motor without a rear end cover, including the following structures:

[0034] Integrated end cover 1, the inner wall of the integrated end cover 1 is fixedly provided with a stator 2, and the inner side of the rear end of the integrated end cover 1 is provided with a rotor assembly 3.

[0035] Machine shaft 6, a front rolling bearing 4 and a rear rolling bearing 5 are respectively assembled on the front and rear sides of the middle part of the machine shaft 6.

[0036] In this embodiment, the front and rear sides of the middle part of the integrated end cover 1 are respectively movably connected to the outer sides of the front rolling bearing 4 and the rear rolling bearing 5, and the surface of the integrated end cover 1 is fixedly provided with weight-reducing and heat-dissipating holes.

[0037] The installation structure of the machine shaft 6 composed of the integrated end cover 1, the front rolling bearing 4 and the rear rolling bearing 5 installs the front rolling bearing 4 and the rear rolling bearing 5 before and after the middle of the machine shaft 6. The rear end of the machine shaft 6 is assembled with the rotor assembly 3, and the front end of the machine shaft 6 is used for the assembly of the load. Compared with the conventional brushless motor with a bearing support provided on each of the front and rear end covers, in this product, the front rolling bearing 4 and the rear rolling bearing 5 are respectively arranged in the middle of the integrated end cover 1 for the installation and support of the machine shaft 6. This structural design tries to shorten the cantilever of the rotor assembly 3, avoid vibration, and at the same time realize the design of the product without a rear end cover structure.

[0038] In this embodiment, mounting bolts 21 are arranged on the outer side of the stator 2, and the mounting bolts 21 fix the stator in the integrated end cover 1.

[0039] The mounting bolts 21 complete the assembly of the stator 2 on the integrated end cover 1, effectively reducing the overall space of the machine. The structure design without a rear end cover reduces the production cost of the product.

[0040] In this embodiment, the middle part of the rotor assembly 3 is fixedly connected to the rear end of the machine shaft 6, and the front and rear ends of the rotor assembly 3 are respectively fixed with a front end plate 31 and a rear end plate 32.

[0041] The rear snap ring 62 arranged on the machine shaft 6 completes the locking of the assembly position of the rotor assembly 3 and the machine shaft 6.

[0042] In this embodiment, the front and rear ends of the machine shaft 6 are respectively clamped with a front snap ring 61 and a rear snap ring 62. The outer side of the front snap ring 61 is movably clamped with the middle part of the integrated end cover 1, the front side of the rear snap ring 62 abuts against the rear side of the rotor assembly 3, and the middle part of the machine shaft 6 is movably connected to the middle part of the integrated end cover 1.

[0043] The front snap ring 61 completes the assembly of the machine shaft 6 and the front rolling bearing 4 on the integrated end cover 1. Through the structural combination of the front rolling bearing 4 and the rear rolling bearing 5, the design of the rear end cover is cancelled, reducing the height dimension of the equipment, reducing the production cost of the equipment, shortening the cantilever length of the machine shaft 6, and avoiding the occurrence of vibrations at the end of the machine shaft 6 and the displacement of the rotor assembly 3.

[0044] The above embodiments only represent a certain implementation manner of the present invention, and its description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent of the present invention; it should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention; therefore, the protection scope of the patent of the present invention should be subject to the appended claims.

Claims

1. A brushless motor without a rear end cover, characterized in that: It includes the following structures: An integrated end cover (1), on the inner wall of which a stator (2) is fixedly arranged, and a rotor assembly (3) is arranged on the inner side of the rear end of the integrated end cover (1); A machine shaft (6), on the front and rear sides of the middle part of which a front rolling bearing (4) and a rear rolling bearing (5) are respectively assembled.

2. The brushless motor without a rear end cover according to claim 1, characterized in that: The front and rear sides of the middle part of the integrated end cover (1) are respectively movably connected to the outer sides of the front rolling bearing (4) and the rear rolling bearing (5), and weight-reducing and heat-dissipating holes are fixedly arranged on the surface of the integrated end cover (1).

3. The brushless motor without a rear end cover according to claim 1, characterized in that: Installation bolts (21) are arranged on the outer side of the stator (2), and the stator is fixed in the integrated end cover (1) by the installation bolts (21).

4. The brushless motor without a rear end cover according to claim 1, wherein: The middle part of the rotor assembly (3) is fixedly connected to the rear end of the machine shaft (6), and a front end plate (31) and a rear end plate (32) are respectively fixedly arranged at the front and rear ends of the rotor assembly (3).

5. The brushless motor without a rear end cover according to claim 1, wherein: The front and rear ends of the machine shaft (6) are respectively clamped with a front snap ring (61) and a rear snap ring (62), the outer side of the front snap ring (61) is movably clamped with the middle part of the integrated end cover (1), the front side of the rear snap ring (62) abuts against the rear side of the rotor assembly (3), and the middle part of the machine shaft (6) is movably connected to the middle part of the integrated end cover (1).

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