Inorganic base motor with waterproof end cap

Abstract

The utility model relates to inorganic seat motor with waterproof end cap, including motor body and install waterproof end cap in the tail of motor body, the tail of waterproof end cap has a concave groove, the inner end wall of groove is equipped with the communicating hole of communicating motor body inner space, waterproof end cap tail still installs one outer sealing plate of plugging groove, still be provided with one inner sealing plate of plugging communicating hole in the inside of groove, the interval of axial between outer sealing plate and inner sealing plate makes the groove form a buffer zone of insulating inside and outside. The utility model discloses through " outer sealing plate + buffer zone + inner sealing plate " double sealing structure, the protection level reaches IP67, can resist the water, dust and so on bad working condition, avoid the pollution invasion motor core area.

Description

Technical Field

[0001] This utility model belongs to the field of frameless motor technology, and specifically relates to a frameless motor with a waterproof end cap. Background Technology

[0002] With the increasing demand for "high power density + lightweight" in fields such as new energy heavy trucks and port special vehicles, frameless motors have become the core choice for electric drive systems of large-tonnage electric tractors due to their advantages of eliminating the traditional metal casing and high axial space utilization.

[0003] However, existing frameless motors have a single sealing method at the tail end, resulting in weak protection. Most products rely on a single sealing ring to achieve end cover sealing. Under extreme working conditions such as wading in ports and dust in mines, the sealing ring is prone to aging and wear, leading to water / dust intrusion into the motor. Utility Model Content

[0004] This utility model addresses the problems of the prior art by providing a frameless motor with waterproof end caps. The specific technical solution is as follows:

[0005] A baseless motor with a waterproof end cap includes a motor body and a waterproof end cap installed at the tail of the motor body. The tail of the waterproof end cap has a recessed groove, and the inner end wall of the groove has a connecting hole that connects to the internal space of the motor body. An outer sealing plate that blocks the groove is also installed at the tail of the waterproof end cap, and an inner sealing plate that blocks the connecting hole is also provided inside the groove. The outer sealing plate and the inner sealing plate have an axial distance between them so that the groove forms a buffer zone that isolates the inside and outside.

[0006] As a further technical solution of this utility model, the groove tail edge has a radially extending outer stepped groove. In the installed state, the outer sealing plate is embedded in the outer stepped groove to form a stepped sealing surface and make the waterproof end cap tail continuously transition.

[0007] As a further technical solution of this utility model, the waterproof end cap is also provided with a screw hole 1 that connects to the outer stepped groove, and the outer sealing plate has a mounting hole 1 corresponding to the screw hole 1. In the installed state, a bolt is screwed into the mounting hole 1 and the screw hole 1 in sequence and restricts the outer sealing plate to the tail of the waterproof end cap.

[0008] As a further technical solution of this utility model, the first mounting hole is provided in multiple sets and is evenly distributed around the groove in the circumference, and the first screw hole is provided in correspondence with the first mounting hole.

[0009] As a further technical solution of this utility model, an inner stepped groove with a connecting hole is provided on the side of the groove head. In the installed state, the inner sealing plate is embedded in the inner stepped groove to form a stepped sealing surface and make the inner end face of the groove continuously transition.

[0010] As a further technical solution of this utility model, a screw hole two connecting the inner stepped groove is also provided on the outside of the connecting hole, and the inner sealing plate has a mounting hole two corresponding to the screw hole two. In the installation state, a bolt is screwed into the mounting hole two and the screw hole two in sequence and restricts the inner sealing plate to the tail of the connecting hole.

[0011] As a further technical solution of this utility model, the second mounting hole is provided in multiple sets and is evenly distributed around the groove in the circumference, and the second screw hole is provided in correspondence with the second mounting hole.

[0012] The beneficial effects of this utility model are as follows:

[0013] (1) Through the double sealing structure of “outer sealing plate + buffer zone + inner sealing plate”, the protection level reaches IP67, which can resist harsh working conditions such as water immersion and dust, and prevent pollutants from entering the core area of ​​the motor.

[0014] (2) The baseless design combined with the end cover integrates protective functions, which helps to eliminate the traditional housing, reduce the axial dimension of the motor by 30%, and reduce the weight by 20%, meeting the high power density requirements of large-tonnage electric tractors. Attached Figure Description

[0015] Figure 1 A schematic diagram of the overall structure of a frameless motor with waterproof end caps is shown.

[0016] Figure 2 A schematic diagram of the waterproof end cap structure is shown;

[0017] Figure 3 A schematic diagram of the outer sealing plate is shown;

[0018] Figure 4 A schematic diagram of the inner sealing plate is shown.

[0019] Legend:

[0020] 100. Motor body; 200. Waterproof end cap; 210. Groove; 211. Outer stepped groove; 212. Screw hole one; 220. Connecting hole; 221. Inner stepped groove; 222. Screw hole two; 230. Outer sealing plate; 231. Mounting hole one; 240. Inner sealing plate; 241. Mounting hole two. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments.

[0022] Figure 1 A schematic diagram of the overall structure of a frameless motor with waterproof end caps is shown. Figure 2 A schematic diagram of the waterproof end cap 200 is shown; Figure 3 A schematic diagram of the outer sealing plate 230 is shown; Figure 4 A structural schematic diagram of the inner sealing plate 240 is shown.

[0023] Figure 1 The frameless motor with a waterproof end cap includes a motor body 100 and a waterproof end cap 200 installed at the tail of the motor body 100.

[0024] The waterproof end cap 200 forms a sealed interface with the tail of the motor body 100 through mechanical connection, replacing part of the protection function of the traditional frame. Its design meets the high power density requirements of "frameless motor". The motor body 100 omits the independent housing and directly achieves protection and structural support through the end cap, and the axial dimension can be reduced by more than 30%.

[0025] Figures 2-4 In the middle, the waterproof end cap 200 has a recessed groove 210 at its tail end. The inner end wall of the groove 210 is provided with a connecting hole 220 that connects to the internal space of the motor body 100. The waterproof end cap 200 is also equipped with an outer sealing plate 230 that blocks the groove 210. The groove 210 is also provided with an inner sealing plate 240 that blocks the connecting hole 220. There is an axial gap between the outer sealing plate 230 and the inner sealing plate 240 so that the groove 210 forms a buffer zone that isolates the inside and outside.

[0026] The outer sealing plate 230 prevents external water / dust from directly intruding into the groove 210. Even if a small amount of contaminants breaks through the outer seal, they will be intercepted in the buffer zone formed by the groove 210 and will not be able to directly contact the inner sealing plate 240. The inner sealing plate 240, as the last line of defense, seals the channel between the connecting hole 220 and the inside of the motor, preventing contaminants from entering the core area through the motor shaft or lead wire. Through the transition structure of "double sealing + buffer cavity", the fault tolerance rate is improved by using layered protection.

[0027] Figure 2 and Figure 3 In the middle, the groove 210 has a radially extending outer stepped groove 211 at the tail edge. In the installed state, the outer sealing plate 230 is embedded in the outer stepped groove 211 to form a stepped sealing surface and make the tail of the waterproof end cap 200 continuously transition.

[0028] The waterproof end cap 200 is also provided with a screw hole 212 that connects to the outer stepped groove 211. The outer sealing plate 230 has a mounting hole 231 corresponding to the screw hole 212. In the installed state, a bolt is screwed into the mounting hole 231 and the screw hole 212 in sequence to restrict the outer sealing plate 230 to the tail of the waterproof end cap 200.

[0029] See Figure 3 The mounting hole 231 has three sets of holes evenly distributed around the groove 210 in the circumference, and the screw hole 212 is set in correspondence with the mounting hole 231.

[0030] The outer sealing plate 230 and the steps of the outer stepped groove 211 form a maze-like path, which increases the resistance to water / dust intrusion. The stepped structure disperses vibration energy, and with the elastic compensation of the wave spring, it can adapt to the high-frequency impact of heavy-duty tractors. The three sets of mounting holes 231 are evenly distributed around the circumference and adopt a synchronous tightening strategy to make the outer sealing plate 230 uniformly stressed, avoiding local stress concentration that could lead to seal failure.

[0031] See also Figure 2 and Figure 3 The outer side of the connecting hole 220 is also provided with a screw hole 222 that connects to the inner stepped groove 221. The inner sealing plate 240 has a mounting hole 241 corresponding to the screw hole 222. In the installed state, a bolt is screwed into the mounting hole 241 and the screw hole 222 in sequence, and the inner sealing plate 240 is restricted to the tail of the connecting hole 220.

[0032] See Figure 4 The second mounting hole 241 has seven sets evenly distributed around the groove 210, and the second screw hole 222 is set in correspondence with the second mounting hole 241.

[0033] The inner stepped groove 221 and the inner sealing plate 240 form a double seal of "axial + radial", which further blocks the intrusion path of pollutants and can withstand a certain water pressure to meet the requirements of short-term immersion. The seven sets of bolts are evenly distributed and the high-density fixing enhances the connection stability and prevents the inner sealing plate 240 from loosening when the motor is running at high speed.

[0034] The above embodiments are only used to illustrate the technical solution of this utility model, and are not intended to limit it.

Claims

1. A frameless motor with a waterproof end cap, comprising a motor body (100) and a waterproof end cap (200) installed at the tail of the motor body (100), characterized in that: The waterproof end cap (200) has a recessed groove (210) at its tail end. A connecting hole (220) is provided on the inner end wall of the groove (210) to connect to the internal space of the motor body (100). An outer sealing plate (230) is also installed at the tail end of the waterproof end cap (200) to block the groove (210). An inner sealing plate (240) to block the connecting hole (220) is also provided inside the groove (210). There is an axial distance between the outer sealing plate (230) and the inner sealing plate (240) so that the groove (210) forms a buffer zone that isolates the inside and outside.

2. The frameless motor with waterproof end caps according to claim 1, characterized in that: The groove (210) has a radially extending outer stepped groove (211) at its tail edge. In the installed state, the outer sealing plate (230) is embedded in the outer stepped groove (211) to form a stepped sealing surface and make the tail of the waterproof end cap (200) transition continuously.

3. The frameless motor with waterproof end caps according to claim 2, characterized in that: The waterproof end cap (200) is also provided with a screw hole (212) that connects to the outer stepped groove (211). The outer sealing plate (230) has a mounting hole (231) corresponding to the screw hole (212). In the installed state, a bolt is screwed into the mounting hole (231) and the screw hole (212) in sequence and restricts the outer sealing plate (230) to the tail of the waterproof end cap (200).

4. The frameless motor with waterproof end caps according to claim 3, characterized in that: The mounting hole 1 (231) is provided in multiple sets and is evenly distributed around the groove (210) in the circumference. The screw hole 1 (212) is provided in correspondence with the mounting hole 1 (231).

5. The frameless motor with waterproof end caps according to claim 1, characterized in that: The groove (210) has an inner stepped groove (221) with a connecting hole (220) on the head side. In the installed state, the inner sealing plate (240) is embedded in the inner stepped groove (221) to form a stepped sealing surface and make the inner end face of the groove (210) continuously transition.

6. The frameless motor with waterproof end caps according to claim 5, characterized in that: The outer side of the connecting hole (220) is also provided with a screw hole two (222) that connects to the inner stepped groove (221). The inner sealing plate (240) has a mounting hole two (241) corresponding to the screw hole two (222). In the installed state, a bolt is screwed into the mounting hole two (241) and the screw hole two (222) in sequence, and the inner sealing plate (240) is restricted to the tail of the connecting hole (220).

7. The frameless motor with waterproof end caps according to claim 6, characterized in that: The second mounting hole (241) is provided with multiple sets and is evenly distributed around the groove (210) in the circumference. The second screw hole (222) is provided in correspondence with the second mounting hole (241).

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