Bladeless waterproof speed reducer

Abstract

The utility model discloses a fan-blade-free waterproof speed reducer, and relates to the field of speed reducers. The gear housing comprises a gear housing body, a gear housing rear cover is installed on the upper surface of the gear housing body, a stator casing is fixedly connected to the upper surface of the gear housing rear cover, a motor rear cover is arranged above the stator casing, a set of screw holes are formed in the periphery of the motor rear cover, and a positioning screw is arranged in each screw hole in a matched mode. And the positioning screw rod penetrates through the screw rod hole and is screwed into the gear shell rear cover along gaps among the stator shell radiating ribs and is fastened. Compared with the prior art, due to the fact that no fan blade fan cover is arranged, the size of the speed reducer is smaller, space is saved, and the size and the weight of the whole system can be reduced. Meanwhile, due to the change of the position of the screw hole, the sealing performance of the motor can be more than IP66, and IP66 indicates that the motor has complete dustproof and splash-proof capabilities, so that the motor can stably operate in a severe environment, and the service life of the motor is prolonged.

Description

Technical Field

[0001] This utility model relates to a bladeless waterproof speed reducer, and pertains to the field of speed reducers. Background Technology

[0002] The conventional geared motors on the market, such as the high-efficiency, high-power-density permanent magnet synchronous motor with anti-reverse bearing disclosed in CN217445222U, consist of components including a gear housing, gear set, gear housing rear cover, stator housing, stator, rotor, motor rear cover, screw, fan blades, and fan shroud. The problem with these motors is their generally poor sealing performance, resulting in significantly inadequate waterproofing. Water seepage primarily occurs through the screw holes and shaft holes in the motor rear cover. This seepage can lead to internal leakage, short circuits, and other safety hazards. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a bladeless waterproof speed reducer.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0005] A bladeless waterproof speed reducer includes a gear housing body, a gear housing rear cover installed on the upper surface of the gear housing body, a stator housing fixedly connected to the upper surface of the gear housing rear cover, a motor rear cover provided above the stator housing, a set of screw holes opened on the outer periphery of the motor rear cover, each screw hole being equipped with a positioning screw, the positioning screw passing through the screw hole and screwed into the gear housing rear cover along the gap between the heat dissipation fins of the stator housing and tightened.

[0006] Compared to existing technologies, the absence of fan blades and shrouds makes the reducer smaller, saving space and reducing the overall system size and weight.

[0007] Meanwhile, the motor rear cover is screwed into the gear housing rear cover by the screw hole through the outer periphery of the positioning screw and along the gap between the heat dissipation fins of the stator housing. Therefore, no water seepage points will be formed on the motor rear cover, stator housing, or gear housing rear cover. Its sealing is easier to reach IP66 or above. IP66 means that the motor has complete dustproof and splashproof capabilities, which can ensure that the motor operates stably in harsh environments and extend its service life.

[0008] Meanwhile, it should be noted that existing technologies mostly involve directly drilling screw holes on the motor's rear cover, with the screws penetrating into the stator housing. The improved screw hole position eliminates the screws that previously affected the core efficiency to some extent by penetrating into the stator housing. Therefore, the motor's effective power can be improved to a certain extent, which can help the motor work more efficiently, reduce energy consumption, and lower operating costs.

[0009] As another improvement of this utility model, the power of this utility model is 100W; the outer diameter of the iron core is 110mm, the inner diameter of the iron core is 65mm, and the thickness of the iron core is 35mm~50mm; the winding uses enameled wire with a wire diameter greater than or equal to 0.29mm, and the total number of turns in the winding is less than or equal to 360. In this scheme, the selection of enameled wire diameter, number of turns, and iron core parameters offers the best cost performance. Attached Figure Description

[0010] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0011] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0012] Figure 2 This is an exploded view of the motor rear cover of this utility model;

[0013] Figure 3 This is a three-dimensional structural diagram of the motor rear cover of this utility model;

[0014] Figure 4 This is a three-dimensional structural diagram of the iron core of this utility model;

[0015] Figure 5 This is a three-dimensional structural diagram of the stator housing of this utility model;

[0016] Figure 6 This is a schematic diagram of the assembly structure of the junction box cover of this utility model;

[0017] Figure 7 This is a planar development diagram of a three-phase single-layer chain winding.

[0018] Explanation of reference numerals in the attached drawings: Gear housing body 100, gear housing rear cover 200, stator housing 300, lead wire hole 301, motor rear cover 400, screw hole 401, sealing layer 402, bearing chamber 403, positioning screw 501, iron core 600, semi-closed pear-shaped groove 601, junction box base 700, lead wire outlet 701, rotor tail end bearing 800, junction box cover 900, wire inlet 901. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0020] The following is in conjunction with the appendix Figures 1 to 7 This application provides a detailed description of the technical solutions provided in each embodiment.

[0021] like Figures 1 to 7 The bladeless waterproof speed reducer shown includes a gear housing body 100, a gear housing rear cover 200 installed on the upper surface of the gear housing body 100, a stator housing 300 fixedly connected to the upper surface of the gear housing rear cover 200, a motor rear cover 400 provided above the stator housing 300, a set of screw holes 401 opened on the outer periphery of the motor rear cover 400, and a positioning screw 501 provided in each screw hole 401. The positioning screw 501 passes through the screw hole 401 and is screwed into the gear housing rear cover 200 along the gap between the heat dissipation fins of the stator housing 300 and tightened.

[0022] The assembly steps of this utility model are as follows:

[0023] I. Stator Assembly

[0024] 1.1 Set the motor model to 100W—three-phase 220V—50Hz

[0025] 1.2 Part Material Parameters

[0026] ① The outer diameter of the iron core 600 is 110mm, the inner diameter of the iron core 600 is 65mm, and the thickness of the iron core 600 is 35mm~50mm;

[0027] ② The enameled wire diameter is 0.29mm or 0.33mm, the number of turns is 260 to 360, and the temperature resistance grade is F.

[0028] ③ Set winding parameters

[0029]

[0030] 1.3 According to Figure 7 The planar development requires that the wires be embedded in the semi-closed pear-shaped slot 601 of the iron core 600; then the stator housing 300 is fitted into the iron core 600, and the winding U1\U2, V1 / V2, W1 / W2 leads are led out from the lead-out hole 301 and out from the lead-out port 701. Then the junction box base 700 is fixed to the stator housing 300.

[0031] II. Motor Assembly

[0032] 2.1 After assembling the gear housing body 100 and the gear housing rear cover 200 with bolts, the sealing layer 402 is then installed on the motor rear cover 400. Next, the bearing 403 is aligned with the rotor tail bearing 800 and pressed in. Then, the sealing ring is put on the positioning screw 501. After the positioning screw 501 passes through the screw hole 401, it is screwed into the gear housing rear cover 200 along the gap between the heat dissipation fins of the stator housing 300 and tightened.

[0033] III. Testing

[0034] 3.1 The external power cord is introduced from the inlet 901 and connected to the three connectors of the outgoing wires U1 / X, V1 / Y, and W1 / Z, and then sealed with electrical tape; then the junction box cover is tightly fixed to the junction box base 700.

[0035] The following table compares the winding temperature rise under different data conditions:

[0036] Comparison of temperature rise of different windings in 100W-220V / Δ connection-50Hz (without fan blades)

[0037]

[0038] 3.2 According to the dynamometer test, under the conditions of 20℃ and rated power, the temperature rise of the motor load is less than 90℃, and it can operate normally.

[0039] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0040] The above are merely embodiments of this application and are not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A bladeless waterproof speed reducer, characterized in that, The device includes a gear housing body (100), a gear housing rear cover (200) is installed on the upper surface of the gear housing body (100), a stator housing (300) is fixedly connected to the upper surface of the gear housing rear cover (200), a motor rear cover (400) is provided above the stator housing (300), a set of screw holes (401) are opened on the outer periphery of the motor rear cover (400), and a positioning screw (501) is provided in each screw hole (401). The positioning screw (501) passes through the screw hole (401) and is screwed into the gear housing rear cover (200) along the gap between the heat dissipation fins of the stator housing (300) and tightened.

2. The bladeless waterproof speed reducer according to claim 1, characterized in that, The power is 100W; the outer diameter of the iron core (600) is 110mm, the inner diameter of the iron core (600) is 65mm, and the thickness of the iron core (600) is 35mm~50mm; the winding uses enameled wire with a wire diameter greater than or equal to 0.29mm, and the total number of turns of the winding is less than or equal to 360.

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