Waterproof structure and stepping motor housing containing the same

Abstract

The present invention relates to the technical field of the production of waterproof structures for motor housings, and specifically relates to a waterproof structure and a stepping motor housing containing the structure, including a motor housing, which includes a first cover plate, a second cover plate and a housing. A plastic sealing layer is provided on the outer side of the motor housing. One end of the housing is movably installed with a first cover plate, and the other end is movably installed with a second cover plate. Sealing strips are fixedly connected to one ends of the first cover plate and the second cover plate close to the housing. A plastic sealing layer is provided on the outer side of the motor housing through an injection molding device, and the sealing strip is clamped in the sealing groove. At the same time, when the plastic sealing layer and the sealing strip are broken, the liquid entering the motor will be adsorbed by the water absorption triggering mechanism. After the water absorption triggering mechanism absorbs a certain amount of liquid, the liquid pushing mechanism will push the sealant into the blocking groove to block the liquid, preventing the liquid from entering the motor and causing damage to the motor.

Description

Technical Field

[0001] The present invention relates to the technical field of waterproof structures for motor housings, and particularly to a waterproof structure and a stepping motor housing containing such a structure. Background Art

[0002] As disclosed in the Chinese patent with the publication number CN218472904U, it discloses a plastic-encapsulated motor with a novel waterproof structure, including a plastic-encapsulated stator, a rotating shaft, a rotor assembly, an end cover, a sealing ring, and a wire protection sleeve. The rotating shaft is connected to the rotor assembly, and the rotor assembly is installed in the plastic-encapsulated stator. The plastic-encapsulated stator includes a stator core, a coil winding, end insulation, and a plastic-encapsulated housing. The plastic-encapsulated housing encapsulates the stator core, the coil winding, and the end insulation into one body. One end of the plastic-encapsulated housing is open, and a circular protrusion is provided on the end face of the open end of the plastic-encapsulated housing. The end cover includes an end plate and a surrounding portion provided at the edge of the end plate.

[0003] However, the above solution has the following deficiencies: In the above patent, through the setting of the sealing ring and the wire protection sleeve, the sealing performance of the motor is improved. However, in the actual use process, after long-term use or after the motor is repaired and installed, when the sealing ring is damaged, since there is only one set of sealing mechanisms in the motor, external liquid may enter the interior of the motor from the damaged position of the sealing ring, resulting in damage to the motor. Therefore, we introduce a waterproof structure and a stepping motor housing containing such a structure. Summary of the Invention

[0004] The purpose of the present invention is to provide a waterproof structure and a stepping motor housing containing such a structure to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the present invention provides the following technical solutions:

[0006] A waterproof structure includes a motor housing, which includes a first cover plate, a second cover plate, and a housing. A plastic-encapsulated layer is provided on the outer side of the motor housing. One end of the housing is movably installed with the first cover plate, and the other end is movably installed with the second cover plate. Sealing strips are fixedly connected to both ends of the first cover plate and the second cover plate close to the housing. The sealing strips are clamped in the sealing grooves. Sealing grooves are opened in both ends of the housing, and water absorption trigger mechanisms are fixedly installed in both ends of the housing. One end of the water absorption trigger mechanism away from the housing is inserted into the connection groove. Connection grooves are opened in the opposite surfaces of the first cover plate and the second cover plate. A number of first traction ropes are movably connected in the water absorption trigger mechanism. The first traction ropes are movably connected in the housing. When external liquid moves inward through the sealing strip, the water absorption trigger mechanism adsorbs the entered liquid. When the water absorption trigger mechanism absorbs a certain amount of liquid, the water absorption trigger mechanism cancels the connection with the first traction rope;

[0007] The first traction rope is fixedly connected to the liquid pushing mechanism at one end away from the water absorption trigger mechanism, and the liquid pushing mechanism is arranged in the shell. Blocking grooves are provided in both ends of the shell and in the opposite surfaces of the first cover plate and the second cover plate. The liquid pushing mechanism is connected to the blocking groove. After the first traction rope is disconnected from the water absorption trigger mechanism, the liquid pushing mechanism pushes the sealant into the blocking groove to seal the blocking groove. The first traction rope is fixedly connected to the blocking mechanism, and the blocking mechanism is arranged in the pushing mechanism at one end away from the first traction rope. When the first traction rope moves, the blocking mechanism is pulled out of the liquid pushing mechanism. After the blocking mechanism is out of the way, the liquid pushing mechanism pushes the sealant into the blocking groove.

[0008] Preferably, the water absorption trigger mechanism includes a connecting ring, connecting rings are fixedly connected to both ends of the shell, a cotton ring is fixedly connected to the outer side of the connecting ring, the lower side of the cotton ring is in contact with the water-soluble trigger rope, the water-soluble trigger rope is arranged in a circle in the connecting ring, a plurality of groups of hooks are clamped on the outer side of the water-soluble trigger rope, the hook is fixedly connected to the first traction rope, the end of the first traction rope away from the hook passes through a give-way hole and is movably connected to the shell, the give-way hole is opened in the connecting ring, and the water-soluble trigger rope is made of water-soluble plastic.

[0009] Preferably, the liquid pushing mechanism includes a liquid storage chamber, the liquid storage chamber is opened in the shell, a push plate is slidably connected in the liquid storage chamber, one end of the push plate is fixedly connected to the push spring, the other end of the push spring is fixedly connected to the liquid storage chamber, the push plate is fixedly connected to the first traction rope near the push spring, the liquid storage chamber is connected to the blocking groove through a connecting chamber, and the connecting chamber is opened in the shell.

[0010] Preferably, the blocking mechanism comprises a blocking film, a second traction rope is fixedly connected inside the blocking film, the second traction rope is movably connected inside the shell, and one end of the second traction rope away from the blocking film is fixedly connected to the first traction rope.

[0011] Preferably, the first cover plate and the second cover plate are both movably connected with fastening screws, the fastening screws are screwed into the screw holes, a plurality of groups of screw holes are opened in both ends of the shell, a first through hole is opened in the middle of the first cover plate, and a second through hole is opened in the middle of the second cover plate.

[0012] In addition, in order to achieve the above object, the present invention also provides a stepping motor housing, comprising the above-mentioned waterproof structure

[0013] Compared with the prior art, the beneficial effects of the present invention are: a plastic sealing layer is arranged on the outside of the motor housing through injection molding equipment, and a sealing strip is clamped in the sealing groove to seal the connection between the first cover plate and the second cover plate and the housing; at the same time, when the plastic sealing layer and the sealing strip are broken, the liquid entering the motor at this time will be absorbed by the water absorption trigger mechanism; after the water absorption trigger mechanism absorbs a certain amount of liquid, the water absorption trigger mechanism will cancel the connection with the first traction rope, so that the liquid pushing mechanism pushes the sealant into the blocking groove to block the liquid, thereby realizing multiple sets of sealing and waterproof structures to seal the motor and prevent liquid from entering the motor and causing damage to the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the cross-sectional structure of the present invention in an exploded state;

[0015] Figure 2 It is a schematic diagram of the cross-sectional structure of the present invention;

[0016] Figure 3 It is a cross-sectional structural schematic diagram of the connection relationship between the first traction rope and the push plate of the present invention;

[0017] Figure 4 It is a cross-sectional structural schematic diagram of the connection relationship between the first traction rope and the water-soluble trigger rope of the present invention;

[0018] Figure 5 It is a three-dimensional structural schematic diagram of the connection relationship between the first cover plate and the second cover plate and the housing of the present invention;

[0019] Figure 6 It is a schematic diagram of the three-dimensional structure of the present invention.

[0020] In the figure: 1. first cover plate; 2. first through hole; 3. connecting groove; 4. liquid storage chamber; 5. push plate; 6. sealing strip; 7. fastening screw; 8. housing; 9. sealing groove; 10. blocking groove; 11. second through hole; 12. second cover plate; 13. cotton ring; 14. plastic sealing layer; 15. connecting ring; 16. second traction rope; 17. connecting chamber; 18. pushing spring; 19. first traction rope; 20. hook; 21. water-soluble trigger rope; 22. make way hole; 23. screw hole; 24. blocking film; 100. motor housing. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] See alsoFigure 1-6 , the present invention provides a technical solution: Embodiment 1:

[0023] A waterproof structure includes a motor housing 100, the motor housing 100 includes a first cover plate 1, a second cover plate 12 and a housing 8. A plastic sealing layer 14 is provided on the outside of the motor housing 100. The motor components are loaded into the housing 8. After loading, the first cover plate 1 and the second cover plate 12 are assembled with the housing 8. After installation, a plastic sealing layer 14 is provided on the outside of the motor housing 100 through an injection molding device, so that the gaps between the first cover plate 1, the second cover plate 12 and the housing 8 are blocked. One end of the housing 8 is movably installed with a first cover plate 1, and the other end is movably installed with a second cover plate 12. Sealing strips 6 are fixedly connected to one ends of the first cover plate 1 and the second cover plate 12 close to the housing 8. The sealing strips 6 are clamped in the sealing grooves 9. By clamping the sealing strips 6 in the sealing grooves 9, the joints between the first cover plate 1, the second cover plate 12 and the housing 8 are sealed and blocked. The sealing strips 6 can be made of elastic materials such as rubber;

[0024] Sealing grooves 9 are respectively formed in both ends of the housing 8. Water absorption trigger mechanisms are fixedly installed in both ends of the housing 8. One ends of the water absorption trigger mechanisms far from the housing 8 are inserted into the connection grooves 3. Connection grooves 3 are respectively formed in the opposite surfaces of the first cover plate 1 and the second cover plate 12. A plurality of groups of first traction ropes 19 are movably connected in the water absorption trigger mechanisms. The first traction ropes 19 are movably connected in the housing 8. When external liquid moves inward through the sealing strips 6, the water absorption trigger mechanisms adsorb the entering liquid. When the water absorption trigger mechanisms absorb a certain amount of liquid, the connection between the water absorption trigger mechanisms and the first traction ropes 19 is cancelled;

[0025] One ends of the first traction ropes 19 far from the water absorption trigger mechanisms are fixedly connected to a liquid pushing mechanism. The liquid pushing mechanism is arranged in the housing 8. Blocking grooves 10 are respectively formed in both ends of the housing 8, in the opposite surfaces of the first cover plate 1 and the second cover plate 12. The liquid pushing mechanism is communicated with the blocking grooves 10. After the connection between the first traction ropes 19 and the water absorption trigger mechanisms is cancelled, the liquid pushing mechanism pushes sealing glue into the blocking grooves 10 to seal the blocking grooves 10. The first traction ropes 19 are fixedly connected to a blocking mechanism. One end of the blocking mechanism far from the first traction ropes 19 is arranged in the liquid pushing mechanism. When the first traction ropes 19 move, the blocking mechanism is pulled to disengage from the liquid pushing mechanism. After the blocking mechanism disengages, the liquid pushing mechanism pushes sealing glue into the blocking grooves 10. Embodiment 2:

[0026] On the basis of Example 1, in order to prevent the sealant from entering the blocking groove 10 under normal conditions, the water absorption trigger mechanism includes a connecting ring 15, both ends of the outer shell 8 are fixedly connected with the connecting ring 15, the outer side of the connecting ring 15 is fixedly connected with a cotton ring 13, the lower side of the cotton ring 13 is in contact with a water-soluble trigger rope 21, the water-soluble trigger rope 21 is surrounded and arranged in the connecting ring 15, and a plurality of groups of hooks 20 are clamped on the outer side of the water-soluble trigger rope 21, the hook 20 is fixedly connected to the first traction rope 19, and the end of the first traction rope 19 away from the hook 20 passes through the give-way hole 22 and is movably connected to the outer shell 8, and the give-way hole 22 is opened in the connecting ring 15, and the water-soluble trigger rope 21 is made of water-soluble plastic, among which polyvinyl pyrrolidone can be selected as the water-soluble plastic. When the plastic sealing layer 14 is damaged due to long-term use or collision, the liquid will be blocked by the sealing strip 6. When the sealing strip 6 cannot block the liquid due to long-term use, the liquid passing through the sealing strip 6 will be absorbed by the cotton ring 13. When a large amount of liquid enters, the liquid absorbed in the cotton ring 13 will contact with the water-soluble trigger rope 21. When the water-soluble trigger rope 21 contacts with the liquid, the water-soluble trigger rope 21 will fuse.

[0027] The liquid pushing mechanism includes a liquid storage chamber 4, the liquid storage chamber 4 is opened in the shell 8, and a push plate 5 is slidably connected in the liquid storage chamber 4. One end of the push plate 5 is fixedly connected to the push spring 18, and the other end of the push spring 18 is fixedly connected to the liquid storage chamber 4. The push plate 5 is fixedly connected to the first traction rope 19 close to the push spring 18. The liquid storage chamber 4 is connected to the blocking groove 10 through the connecting chamber 17. The connecting chamber 17 is opened in the shell 8. After the water-soluble trigger rope 21 is melted, several groups of hooks 20 will be separated from the water-soluble trigger rope 21. At this time, under the elastic force of the push spring 18, the push plate 5 moves and drives the first traction rope 19 to move synchronously. The blocking mechanism includes a blocking The blocking film 24 has a second traction rope 16 fixedly connected inside the blocking film 24, and the second traction rope 16 is movably connected to the outer shell 8. The second traction rope 16 is fixedly connected to the first traction rope 19 at one end away from the blocking film 24. The first traction rope 19 drives the second traction rope 16 to move when moving. The movement of the second traction rope 16 pulls the blocking film 24, so that the blocking film 24 breaks to cancel the blocking of the connecting cavity 17. The push plate 5 pushes the sealant in the liquid storage cavity 4 into the blocking groove 10 through the connecting cavity 17. After the sealant enters the blocking groove 10 and solidifies, it blocks the liquid to prevent the liquid from further entering the inner part of the outer shell 8.

[0028] A fastening screw 7 is movably connected inside both the first cover plate 1 and the second cover plate 12. The fastening screw 7 is screwed into the screw hole 23. A plurality of groups of screw holes 23 are provided inside both ends of the outer shell 8. A first through hole 2 is provided inside the middle of the first cover plate 1, and a second through hole 11 is provided inside the middle of the second cover plate 12. During the installation process, the sealing strip 6 is snap-fitted into the sealing groove 9, and the connecting ring 15 is snap-fitted into the connecting groove 3. The first through hole 2 is used to pass through the motor rotating shaft, and the second through hole 11 is used to pass through the motor wire. After assembly, the fastening screw 7 is screwed into the screw hole 23, so that the first cover plate 1 and the second cover plate 12 are installed together with the outer shell 8.

[0029] In addition, to achieve the above object, the present invention also provides a stepping motor outer shell, including the above waterproof structure.

[0030] Working principle: During use, the motor components are loaded into the outer shell 8. After loading, the first cover plate 1 and the second cover plate 12 are assembled with the outer shell 8. During the installation process, the sealing strip 6 is snap-fitted into the sealing groove 9, and the connecting ring 15 is snap-fitted into the connecting groove 3. The first through hole 2 is used to pass through the motor rotating shaft, and the second through hole 11 is used to pass through the motor wire. After assembly, the fastening screw 7 is screwed into the screw hole 23, so that the first cover plate 1 and the second cover plate 12 are installed together with the outer shell 8. After installation, a plastic sealing layer 14 is provided on the outside of the motor outer shell 100 through an injection molding device, so that the gap between the first cover plate 1 and the second cover plate 12 and the outer shell 8 is blocked;

[0031] When the plastic sealing layer 14 is damaged due to long-term use or collision, at this time, the liquid will be blocked by the sealing strip 6. When the sealing strip 6 cannot block the liquid due to long-term use, at this time, the liquid passing through the sealing strip 6 will be absorbed by the cotton ring 13. When more liquid enters, at this time, the liquid absorbed in the cotton ring 13 will come into contact with the water-soluble trigger rope 21. When the water-soluble trigger rope 21 comes into contact with the liquid, at this time, the water-soluble trigger rope 21 will melt, and a plurality of groups of hooks 20 will disengage from the water-soluble trigger rope 21. At this time, under the elastic force of the pushing spring 18, the push plate 5 moves and drives the first traction rope 19 to move synchronously. When the first traction rope 19 moves, it drives the second traction rope 16 to move. The second traction rope 16 moves to pull the blocking film 24, so that the blocking film 24 ruptures and cancels the blocking of the connecting cavity 17;

[0032] At this time, the push plate 5 pushes the sealant in the liquid storage cavity 4 into the blocking groove 10 through the connecting cavity 17. After the sealant enters the blocking groove 10 and solidifies, it blocks the liquid, preventing the liquid from further entering the inside of the outer shell 8.

[0033] Although embodiments of the present invention have been shown and described, those of ordinary skill in the art will appreciate that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A waterproof structure, comprising a motor housing, the motor housing comprising a first cover plate, a second cover plate and a housing, characterized in that: A plastic sealing layer is provided on the outside of the motor housing, a first cover plate is movably installed at one end of the housing, and a second cover plate is movably installed at the other end, the first cover plate and the second cover plate are fixedly connected with sealing strips near one end of the housing, the sealing strips are clamped in the sealing groove, sealing grooves are provided in both ends of the housing, a water absorption trigger mechanism is fixedly installed in both ends of the housing, the water absorption trigger mechanism is plugged into the connecting groove at one end away from the housing, connecting grooves are provided in the opposite surfaces of the first cover plate and the second cover plate, a plurality of groups of first traction ropes are movably connected in the water absorption trigger mechanism, the first traction ropes are movably connected in the housing, when external liquid passes through the sealing strip and moves inward, the entering liquid is absorbed by the water absorption trigger mechanism, and when the water absorption trigger mechanism absorbs a certain amount of liquid, the water absorption trigger mechanism cancels the connection with the first traction rope; The first traction rope is fixedly connected to the liquid pushing mechanism at one end away from the water absorption trigger mechanism, and the liquid pushing mechanism is arranged in the shell, and blocking grooves are provided in both ends of the shell and in the opposite surfaces of the first cover plate and the second cover plate, and the liquid pushing mechanism is connected to the blocking groove. After the first traction rope is disconnected from the water absorption trigger mechanism, the liquid pushing mechanism pushes the sealant into the blocking groove to seal the blocking groove. The first traction rope is fixedly connected to the blocking mechanism, and the blocking mechanism is arranged in the pushing mechanism at one end away from the first traction rope. When the first traction rope moves, the blocking mechanism is pulled out of the liquid pushing mechanism, and after the blocking mechanism is out of the liquid pushing mechanism, the liquid pushing mechanism pushes the sealant into the blocking groove; The water absorption trigger mechanism includes a connecting ring, both ends of the shell are fixedly connected with the connecting ring, the outer side of the connecting ring is fixedly connected with a cotton ring, the lower side of the cotton ring is in contact with the water-soluble trigger rope, the water-soluble trigger rope is arranged in the connecting ring, and the outer side of the water-soluble trigger rope is clamped with a plurality of groups of hooks, the hook is fixedly connected with the first traction rope, the end of the first traction rope away from the hook passes through the clearance hole and is movably connected to the shell, the clearance hole is provided in the connecting ring, and the water-soluble trigger rope is made of water-soluble plastic; The liquid pushing mechanism includes a liquid storage cavity, the liquid storage cavity is opened in the shell, a push plate is slidably connected in the liquid storage cavity, one end of the push plate is fixedly connected to the push spring, the other end of the push spring is fixedly connected to the liquid storage cavity, the push plate is fixedly connected to the first traction rope near the push spring, the liquid storage cavity is connected to the blocking groove through a connecting cavity, and the connecting cavity is opened in the shell; The blocking mechanism comprises a blocking film, a second traction rope is fixedly connected inside the blocking film, the second traction rope is movably connected inside the shell, and one end of the second traction rope away from the blocking film is fixedly connected to the first traction rope.

2. A waterproof structure according to claim 1, characterized in that: The first cover plate and the second cover plate are both movably connected with fastening screws, the fastening screws are screwed into the screw holes, a plurality of groups of screw holes are opened in both ends of the shell, a first through hole is opened in the middle of the first cover plate, and a second through hole is opened in the middle of the second cover plate.

3. A stepper motor housing, characterized in that: The waterproof structure comprises any one of claims 1 to 2.

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