Gear motor
The reduction motor addresses humidity-related issues by rotating a hygroscopic sponge and using a moisture absorption mechanism to manage humidity and airflow, ensuring effective heat dissipation and prolonged operation in humid conditions.
Patent Information
- Application Number
- CN202411025134.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-29
- Publication Date
- 2024-12-24
- Estimated Expiration
- 2044-07-29
AI Technical Summary
Gearing motors operating in humid environments face issues with water vapor accumulation leading to electrical failures due to ineffective humidity control, particularly in high humidity conditions where traditional desiccants become saturated and lose air permeability, compromising heat dissipation.
A reduction motor design featuring a hygroscopic sponge that rotates to alternately cover the air inlet and outlet, combined with a moisture absorption mechanism using water pressing rollers and a desiccant shell to manage humidity and maintain airflow directionality, ensuring effective heat dissipation and moisture removal.
The design enables prolonged operation in high humidity environments by maintaining low internal humidity and effective heat dissipation, preventing electrical failures and ensuring consistent airflow, thus enhancing motor performance.
Smart Images
Figure CN118783686B_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of motors. Background Art
[0002] The geared motor will generate heat during operation, and the heat accumulation will cause the performance of the geared motor to deteriorate. Therefore, the geared motor needs to dissipate heat during operation. The usual heat dissipation method is to set a cooling fan inside. The cooling fan rotates with the motor shaft to form a cooling airflow inside the motor, thereby dissipating the heat and cooling the motor.
[0003] Some reduction motors work in humid environments, such as driving a stirring mechanism near a pool, or in a working environment with a lot of steam. The air humidity is high, and the air containing a lot of water vapor will be sucked into the motor by the cooling fan of the reduction motor. The accumulation of water vapor may cause electrical failures. In the prior art, a sponge that absorbs water vapor in the air is set at the heat dissipation air inlet to reduce the humidity of the air sucked into the reduction motor, thereby reducing the accumulation of water vapor inside the reduction motor. It is still effective in an environment with relatively low air humidity. In an environment with higher air humidity, the sponge will quickly absorb a lot of water and become saturated. After that, not only will it be unable to continue to absorb water vapor in the air, but its air permeability will also be reduced, weakening the heat dissipation airflow and thus the heat dissipation effect. Summary of the invention
[0004] In view of this, the present invention provides a reduction motor, which can work for a long time in an environment with high air humidity and still maintain low air humidity inside the motor.
[0005] To achieve the above objectives, the present invention provides the following technical solutions.
[0006] The reduction motor comprises a motor housing, a cooling fan and a motor body. The motor body and the cooling fan are both arranged in the motor housing. The motor housing is provided with an air inlet and an air outlet. The cooling fan rotates to form a cooling airflow in the motor housing to dissipate heat for the motor body. Air enters from the air inlet and flows out from the air outlet to form the cooling airflow. A bent shell cavity with openings only at two ends is provided in the motor housing. The cooling fan and the motor body are both arranged in the shell cavity. The openings at both ends of the shell cavity are the air inlet and the air outlet, respectively. The air inlet and the air outlet are arranged side by side. The reduction motor also comprises a hygroscopic sponge. The hygroscopic sponge covers the air inlet and the air outlet, and can be rotated so that the part covering the air inlet and the part covering the air outlet can be exchanged.
[0007] The inner cavity of the shell is open only at two ends, allowing the heat dissipation airflow to flow in one direction, and allowing the air inlet and the air outlet to be arranged side by side, so that the hygroscopic sponge can cover them at the same time, and can rotate to exchange the position of the part covering the air inlet and the part covering the air outlet. The air temperature blown out from the air outlet is relatively high, and it blows to the outside of the reduction motor. After the hygroscopic sponge covers the air inlet and absorbs more moisture, it exchanges its position with the part covering the air outlet, and uses the hot air blown out from the air outlet to dry it. The hot air takes the water vapor out of the reduction motor and blows away the dust attached to the hygroscopic sponge. After it is dried, it exchanges its position again. This cycle can ensure the hygroscopic effect and air permeability of the hygroscopic sponge at the air inlet, so that the reduction motor can work in an environment with high air humidity for a long time and still maintain a low air humidity inside the motor.
[0008] Among them, it also includes a moisture absorption mechanism, which includes a water pressing roller, a position change driving device and the moisture absorption sponge. The water pressing roller is arranged between the air inlet and the air outlet, and squeezes the moisture absorption sponge. The position change driving device drives the water pressing roller to rotate, and the rotation of the water pressing roller drives the moisture absorption sponge to rotate, so that the moisture absorption sponge covering the air inlet part and the air outlet part are exchanged, and the moisture in the moisture absorption sponge is squeezed out.
[0009] Among them, there are two pairs of water-pressing rollers, each pair has two rollers, and the two water-pressing rollers clamp and squeeze the hygroscopic sponge from both sides of the hygroscopic sponge respectively. The two pairs of water-pressing rollers are arranged side by side in an "I" shape. The second ends of the two water-pressing rollers of each pair of water-pressing rollers are provided with mutually meshing synchronous gears, and the first ends of the two water-pressing rollers located on one side of the hygroscopic sponge are provided with driven gears, and the transposition drive device is provided with a driving gear, and the driven gears are meshed with the driving gear.
[0010] Among them, the water pressing roller is hollow, and a drainage channel is formed inside it passing through its two ends. The side wall of the water pressing roller is provided with a plurality of water absorption holes passing through the side wall of the water pressing roller, and the water absorption holes are connected to the drainage channel. The moisture absorption mechanism is also provided with an air guide duct, which guides the hot air at the air outlet from the first end of the drainage channel into the drainage channel, and the hot air flows in the drainage channel to its second end and flows out from its second end.
[0011] Among them, the desiccant mechanism also includes a desiccant shell, the desiccant sponge and the water pressing roller are both arranged in the desiccant shell, the desiccant shell is fixed to the motor shell and covers the air inlet and the air outlet, the desiccant shell is provided with two groups of ventilation holes corresponding to the air inlet and the air outlet respectively, a plurality of roller cavities are provided in the desiccant shell, the roller cavities correspond to the water pressing rollers one by one, each water pressing roller is respectively engaged with the corresponding roller cavity, the water pressing roller is tightly fitted to the inner wall of the roller cavity to block the air from the air inlet and the air outlet from circulating in the desiccant mechanism, a water release groove is provided in the roller cavity, the water release groove is provided with a vent, and the drainage channel gradually narrows from the second end to the first end to form a conical structure, so that when the water absorption hole is connected to the water release groove, the residual water in the water absorption hole can be sucked into the drainage channel.
[0012] A funnel-shaped expander is provided at the inlet of the air duct to increase the air intake and improve the air flow rate in the air duct. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 It is a schematic diagram of the three-dimensional structure of the reduction motor of the present invention.
[0014] Figure 2 It is a schematic diagram of the exploded structure of the reduction motor of the present invention.
[0015] Figure 3 It is a schematic diagram of the exploded structure of the reduction motor of the present invention from another angle.
[0016] Figure 4 A cross-sectional view of the motor housing.
[0017] Figure 5 It is a partial structural diagram of the moisture absorption mechanism.
[0018] Figure 6 It is a cross-sectional view of the water press roller.
[0019] Figure 7 A schematic diagram of the three-dimensional structure of a hygroscopic half shell.
[0020] Figure 8 for Figure 7 A magnified schematic diagram of center A.
[0021] Reference numerals include:
[0022] Motor housing 1, housing cavity 11, air inlet 111, air outlet 112;
[0023] Moisture absorbing mechanism 4, moisture absorbing sponge 41, water pressing roller 42, synchronous gear 421, driven gear 422, drainage channel 423, water absorbing hole 424, transposition driving device 43, driving gear 431, air guide 44, expander 441, moisture absorbing half shell 451, ventilation hole 452, roller cavity 453, water release groove 454, vent 4541;
[0024] Air guide hood 5. DETAILED DESCRIPTION
[0025] The present invention is described in detail below in conjunction with specific embodiments.
[0026] like Figure 1-2 As shown, the reduction motor of this embodiment includes a motor housing 1, a cooling fan, a motor body, a moisture absorption mechanism 4 and an air guide cover 5, Figure 4The motor housing 1 is provided with a bent shell cavity 11 with only two ends opened. The cooling fan and the motor body (not shown in the drawings) are both arranged in the shell cavity 11. The motor housing 1 can be formed by splicing a plurality of pieces, so that the motor body and the cooling fan are placed in the shell cavity 11. The two ends of the shell cavity 11 are respectively an air inlet 111 and an air outlet 112. The air inlet 111 and the air outlet 112 are arranged side by side. The cooling fan rotates to form a cooling airflow in the motor housing 1 to dissipate heat for the motor body. The air enters from the air inlet 111 and flows out from the air outlet 112 to form the cooling airflow. Figure 4 The middle arrow shows the flow path of the heat dissipation airflow in the shell cavity 11, and the heat dissipation airflow flows along the shell cavity 11 to form a U-shaped path, such as Figure 2 As shown, the air inlet 111 and the air outlet 112 are mirror-image structures, each occupying approximately half of the area of this end of the motor housing 1. The desiccant mechanism 4 is connected to this end of the motor housing 1, and the air guide cover 5 is connected to the desiccant mechanism 4 to protect the desiccant mechanism 4. The desiccant mechanism 4 includes a desiccant sponge 41. The desiccant sponge 41 covers the air inlet 111 and the air outlet 112, and can be rotated to allow the part covering the air inlet 111 to exchange positions with the part covering the air outlet 112. The air blown out from the air outlet 112 has a higher temperature and blows toward the outside of the reduction motor. After the hygroscopic sponge 41 covers the air inlet 111 and absorbs more moisture, it exchanges its position with the part covering the air outlet 112 and is dried by the hot air blown out from the air outlet 112. The hot air brings the water vapor in it out of the reduction motor and blows away the dust attached to the hygroscopic sponge 41. After it is dried, it exchanges its position again. This cycle ensures the hygroscopic effect and air permeability of the hygroscopic sponge 41 at the air inlet 111, so that the reduction motor can work in an environment with high air humidity for a long time and still maintain a low air humidity inside the motor.
[0027] like Figure 2 , 3 As shown in FIG. 5 , the moisture absorption mechanism 4 further includes a water pressing roller 42 and a transposition drive device 43. The transposition drive device 43 can be a small motor. There are two pairs of water pressing rollers 42, each pair having two rollers. The two water pressing rollers 42 clamp and squeeze the moisture absorption sponge 41 from both sides of the moisture absorption sponge 41, respectively. The two pairs of water pressing rollers 42 are arranged side by side in a “one” shape and are arranged between the air inlet 111 and the air outlet 112. The second ends of the two water pressing rollers 42 of each pair of water pressing rollers 42 are provided with mutually meshing synchronous gears 421, as shown in FIG. Figure 5As shown, the first ends of the two water-pressing rollers 42 located on one side of the moisture-absorbing sponge 41 are both provided with a driven gear 422, and the transposition drive device 43 is provided with a driving gear 431, and the driven gears 422 are meshed with the driving gear 431. With the center of rotation of the moisture-absorbing sponge 41 and the water-pressing roller 42 as the inner side, and the circumferential divergence direction as the outer side, the first end is the inner end, and the second end is the outer end. The transposition drive device 43 drives the four water-pressing rollers 42 to rotate synchronously through the driving gear 431, the driven gear 422 and the synchronous gear 421. The two water-pressing rollers 42 of each pair of water-pressing rollers 42 rotate in opposite directions, so as not to tear the moisture-absorbing sponge 41. The rotation of the water-pressing roller 42 drives the moisture-absorbing sponge 41 to rotate, so that the part of the moisture-absorbing sponge 41 covering the air inlet 111 and the part covering the air outlet 112 are exchanged, and the moisture in the moisture-absorbing sponge 41 is squeezed out. During the process of exchanging the part of the hygroscopic sponge 41 covering the air inlet 111 to the part covering the air outlet 112, the water pressing roller 42 squeezes the hygroscopic sponge 41, and most of the water in the hygroscopic sponge 41 can be squeezed out. After this part of the hygroscopic sponge 41 is exchanged to the air outlet 112, it can be dried faster. The water pressing roller 42 is arranged between the air inlet 111 and the air outlet 112. Squeezing the hygroscopic sponge 41 at this position, on the one hand, blocks the air flow between the air inlet 111 and the air outlet 112 through the hygroscopic sponge 41, and prevents the hot air from the air outlet 112 from directly reaching the air inlet 111 through the hygroscopic sponge 41 and affecting the heat dissipation effect of the motor. On the other hand, it prevents the water absorbed by the part of the hygroscopic sponge 41 covering the air inlet 111 from diffusing to the part covering the air outlet 112, and prevents the part of the hygroscopic sponge 41 covering the air outlet 112 from being dried all the time.
[0028] like Figure 6 As shown, the water pressing roller 42 is hollow, and a drainage channel 423 is formed inside the water pressing roller 42 and passes through the first end and the second end thereof. The side wall of the water pressing roller 42 is provided with a plurality of water absorption holes 424 passing through the side wall, and the water absorption holes 424 are connected to the drainage channel 423. Figure 3 As shown, the moisture absorption mechanism 4 is further provided with an air guide 44, which guides the hot air at the air outlet 112 into the drain channel 423 from the first end thereof, and the hot air flows in the drain channel 423 toward the second end thereof and flows out from the second end thereof. A funnel-shaped expander 441 is provided at the inlet of the air guide 44 to increase the air intake and the air flow rate in the air guide 44. The water pressing roller 42 squeezes the moisture absorption sponge 41, and the moisture in the moisture absorption sponge 41 is squeezed out and enters the drain channel 423 from the water absorption hole 424, and then is pushed by the air flow to be discharged from the second end of the drain channel 423. If the amount of water is small, it will be dried in the drain channel 423 to prevent the moisture from being reabsorbed by another part of the moisture absorption sponge 41.
[0029] like Figure 2-3As shown, the moisture absorption mechanism 4 also includes a moisture absorption shell, the moisture absorption sponge 41 and the water pressing roller 42 are both arranged in the moisture absorption shell, the moisture absorption shell is fixed to the motor shell 1, and covers the air inlet 111 and the air outlet 112, and the moisture absorption shell is provided with two groups of ventilation holes 452 corresponding to the air inlet 111 and the air outlet 112 respectively, and the moisture absorption shell is formed by splicing two moisture absorption half shells 451, and the structures of the two moisture absorption half shells 451 are generally mirror structures, and adaptive structures that cooperate with other components are provided at local positions, for example, one moisture absorption half shell 451 needs to be installed with an air guide duct 44 and a transposition drive device 43, which are provided with holes or grooves at corresponding positions. The two moisture absorption half shells 451 can be spliced together by screwing, gluing, etc. The moisture absorbing half shell 451 is provided with a roller cavity 453. After the two moisture absorbing half shells 451 are spliced to form a moisture absorbing shell, the roller cavity 453 corresponds to the water pressing roller 42 one by one, and each water pressing roller 42 is respectively engaged with the corresponding roller cavity 453. The water pressing roller 42 fits tightly with the inner wall of the roller cavity 453 to block the air from the air inlet 111 and the air outlet 112 from circulating in the moisture absorbing mechanism 4. Since the air inlet 111 and the air outlet 112 need to be sealed and isolated, the water pressing roller 42 fits tightly with the inner wall of the roller cavity 453. After the water absorption hole 424 leaves the moisture absorbing sponge 41, the outer opening is immediately blocked by the inner wall of the roller cavity 453. At this time, there may still be water left in the water absorption hole 424, but after the outer opening of the water absorption hole 424 is blocked, the water therein is retained in the water absorption hole 424. Figure 6-8 As shown, a water release groove 454 is provided in the roller cavity 453, and a vent 4541 is provided in the water release groove 454 to connect to the outlet of the air duct 44 or the outside, so that normal air pressure can be maintained in the water release groove 454, that is, the outer opening can be opened when the water absorption hole 424 passes through, and the drainage channel 423 gradually narrows from the second end to the first end to form a conical structure, and hot air flows from the narrow end of the drainage channel 423 to the wider end. By using the Bernoulli principle, a negative pressure is formed in the water absorption hole 424 at this time, and the residual moisture therein is sucked into the drainage channel 423 and discharged or dried by air, so as to prevent the residual water in the water absorption hole 424 from being absorbed back by the moisture absorption sponge 41 when the water absorption hole 424 contacts the moisture absorption sponge 41 next time.
[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention, rather than to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the present invention.
Claims
1. A reduction motor, comprising a motor housing, a cooling fan and a motor body, wherein the motor body and the cooling fan are both arranged in the motor housing, the motor housing is provided with an air inlet and an air outlet, the cooling fan rotates to form a cooling airflow in the motor housing to dissipate heat for the motor body, air enters from the air inlet and flows out from the air outlet to form the cooling airflow, wherein the cooling airflow is characterized in that: The motor housing is provided with a bent shell cavity with only two ends open, the cooling fan and the motor body are both arranged in the shell cavity, the two ends of the shell cavity opening are the air inlet and the air outlet respectively, the air inlet and the air outlet are arranged side by side, the reduction motor also includes a moisture-absorbing sponge, the moisture-absorbing sponge covers the air inlet and the air outlet, and can be rotated so that the part covering the air inlet and the part covering the air outlet are exchanged; It also includes a moisture absorption mechanism, which includes a water pressing roller, a position-changing driving device and the moisture absorption sponge. The water pressing roller is arranged between the air inlet and the air outlet, and squeezes the moisture absorption sponge. The position-changing driving device drives the water pressing roller to rotate, and the rotation of the water pressing roller drives the moisture absorption sponge to rotate, so that the moisture absorption sponge covering the air inlet part and the moisture absorption sponge covering the air outlet part are exchanged, and the moisture in the moisture absorption sponge is squeezed out. There are two pairs of water-pressing rollers, each pair has two rollers, the two water-pressing rollers clamp and squeeze the moisture-absorbing sponge from both sides respectively, the two pairs of water-pressing rollers are arranged side by side in a "I" shape, the second ends of the two water-pressing rollers of each pair of water-pressing rollers are provided with mutually meshing synchronous gears, the first ends of the two water-pressing rollers located on one side of the moisture-absorbing sponge are provided with driven gears, the transposition drive device is provided with driving gears, and the driven gears are meshed with the driving gears; The water pressing roller is hollow, and a drainage channel is formed inside the roller and passes through both ends thereof. The side wall of the water pressing roller is provided with a plurality of water absorption holes that pass through the side wall of the water pressing roller, and the water absorption holes are connected to the drainage channel. The moisture absorption mechanism is also provided with an air guide pipe, and the air guide pipe guides the hot air at the air outlet from the first end of the drainage channel into the drainage channel, and the hot air flows in the drainage channel to the second end thereof and flows out from the second end thereof. The desiccant mechanism also includes a desiccant shell, in which the desiccant sponge and the water pressing roller are arranged, the desiccant shell is fixed to the motor shell and covers the air inlet and the air outlet, the desiccant shell is provided with two groups of ventilation holes corresponding to the air inlet and the air outlet respectively, a plurality of roller cavities are provided in the desiccant shell, the roller cavities correspond to the water pressing rollers one by one, each water pressing roller is respectively engaged with the corresponding roller cavity, the water pressing roller is tightly fitted to the inner wall of the roller cavity to block the air from the air inlet and the air outlet from circulating in the desiccant mechanism, a water release groove is provided in the roller cavity, the water release groove is provided with a vent, and the drainage channel gradually narrows from the second end to the first end to form a conical structure, so that when the water absorption hole is connected to the water release groove, the residual water in the water absorption hole can be sucked into the drainage channel.
2. The reduction motor according to claim 1, characterized in that: A funnel-shaped expander is provided at the inlet of the air duct to increase the air intake volume and improve the air flow rate in the air duct.