High-efficiency corrosion-resistant sealed stepping motor

Abstract

The utility model discloses a kind of high-efficiency corrosion-resistant sealed stepper motor, including the detachable waterproof shell being arranged in the outside of motor body, the stator surface of motor body is provided with heat conduction sheet, the inside of waterproof shell is provided with the helical fin of contact with heat conduction sheet, the waterproof shell uses split structure and is fixed by bolt, the end face of motor body near motor shaft side is provided with annular groove, stainless steel sealing cylinder is embedded and installed in annular groove, sealing cylinder other end is connected with fixed frame, fixed frame both sides are installed on the end face of motor body by guide rod and motor shaft passes through from fixed frame center, fixed frame is provided with slip sleeve assembly located in the outside of sealing cylinder. The utility model is convenient for operator to complete cleaning operation by the structural design of slip sleeve assembly, improves heat dissipation efficiency in combination with helical fin structure, avoids overheating problem caused by sealing, and detachable waterproof shell reduces maintenance cost.

Description

Technical Field

[0001] This utility model relates to the field of electromechanical technology, and in particular to a high-efficiency, corrosion-resistant, sealed stepper motor suitable for corrosive environments such as chemical and marine environments. Background Technology

[0002] A stepper motor is a type of electric motor that converts electrical pulse signals into corresponding angular or linear displacement. For each input pulse signal, the rotor rotates by an angle or moves forward one step. The output angular or linear displacement is proportional to the number of input pulses, and the rotational speed is proportional to the pulse frequency. Therefore, stepper motors are also called pulse motors. The biggest difference between stepper motors and other control motors is that they receive digital control signals (electrical pulse signals) and convert them into corresponding angular or linear displacements. It is itself an actuator that completes digital mode conversion, and it can perform open-loop position control. Inputting a pulse signal yields a specified position increment. This incremental position control system significantly reduces costs compared to traditional DC control systems, requiring almost no system adjustments. The angular displacement of a stepper motor is strictly proportional to the number of input pulses and synchronized with the pulses in time. Therefore, by controlling the number, frequency, and phase sequence of the motor windings, the desired angle, speed, and direction can be obtained.

[0003] Stepper motors are prone to performance degradation or damage in corrosive environments due to liquid penetration and chemical corrosion. In existing technologies, corrosion prevention methods mostly employ coating protection or physical sealing structures. For example, a corrosion-resistant stepper motor is disclosed in CN216290444U. However, the surface of the stepper motor in the above solution is easily worn, and the protective effect decreases after long-term use. During cleaning, the operator needs to continuously press the moving ring and auxiliary ring with their hand, which is difficult for a single person to operate. Traditional sealing structures are complex, and the waterproof shell needs to be frequently disassembled and replaced, making maintenance difficult. The sealing structure can also lead to poor heat dissipation. Utility Model Content

[0004] To address the aforementioned technical problems, a stepper motor that combines efficient heat dissipation, dynamic sealing, and corrosion resistance is provided, resolving the contradiction between sealing performance and heat dissipation, as well as the inconvenience of maintenance in the prior art.

[0005] To achieve the above objectives, this utility model discloses a high-efficiency, corrosion-resistant, sealed stepper motor, including a detachable waterproof housing disposed on the outside of the motor body. The stator surface of the motor body is provided with heat-conducting plates, and the inner side of the waterproof housing is provided with spiral heat dissipation fins that contact the heat-conducting plates. The waterproof housing adopts a split structure and is fixed by bolts. An annular groove is opened on the end face of the motor body near the motor shaft, and a stainless steel sealing cylinder is embedded in the annular groove. The other end of the sealing cylinder is connected to a fixing frame. The fixing frame is mounted on the end face of the motor body through guide rods on both sides, and the motor shaft passes through the center of the fixing frame. A sliding sleeve assembly located outside the sealing cylinder is provided on the fixing frame.

[0006] Furthermore, the outer layer of the waterproof shell is provided with a PTFE coating, the inner layer of the waterproof shell is provided with an antistatic coating, the space between the PTFE coating and the antistatic coating is filled with a flame-retardant and high-temperature resistant material, and the joints of the waterproof shell are filled with corrosion-resistant silicone.

[0007] Furthermore, the sliding sleeve assembly includes a movable ring slidably disposed on the outside of the sealing cylinder, with both ends of the movable ring sleeved on the guide rod. A first spring assembly sleeved on the guide rod is disposed between the movable ring and the motor body. At least two sets of arc-shaped pressure rings are disposed on the inner ring of the movable ring, and a folding protective cover connected to the motor body is disposed at the bottom of the movable ring.

[0008] Furthermore, the arc-shaped pressure ring is embedded in a groove inside the movable ring, and a second spring assembly is provided on the end face of the arc-shaped pressure ring to connect with the movable ring. A brush body is provided on the inner ring of the arc-shaped pressure ring.

[0009] Furthermore, a pressing block is connected to the outer side of the arc-shaped pressure ring, which passes through the movable ring.

[0010] Furthermore, a guide groove is provided on the end face of the motor body near the sealing cylinder, and an inclined platform is provided on the outer side of the sealing cylinder near the motor body.

[0011] Furthermore, the motor body is equipped with a modular circuit board structure, and the connection between the circuit board structure and the wires is covered with a fluororubber tube. The interior is filled with epoxy resin, and the circuit board structure is connected to the outside using an IP67-rated quick-connect connector.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model discloses a high-efficiency and corrosion-resistant sealed stepper motor. The structural design of the sliding sleeve assembly makes it convenient for a single operator to complete the cleaning work. Combined with the spiral fin structure, the heat dissipation efficiency is improved, avoiding overheating problems caused by sealing. The detachable waterproof shell reduces maintenance costs. Attached Figure Description

[0013] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0015] Figure 2 This is a schematic diagram of the internal structure of this utility model.

[0016] Figure 3 This utility model Figure 2 A partial schematic diagram of point A in the middle.

[0017] Figure 4 This is a schematic diagram of the internal structure of the sliding sleeve assembly of this utility model.

[0018] In the diagram: 1 is the motor body; 11 is the motor shaft; 12 is the annular groove; 13 is the guide groove; 2 is the waterproof outer shell; 3 is the sealing cylinder; 31 is the inclined platform; 4 is the fixing frame; 5 is the guide rod; 6 is the first spring assembly; 7 is the sliding sleeve assembly; 71 is the movable ring; 72 is the arc-shaped pressure plate; 721 is the pressing block; 73 is the folding protective cover; 74 is the second spring assembly; 8 is the spiral heat dissipation fins. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] One embodiment of this utility model is as follows: Figure 1 and Figure 2 As shown, the stator surface of the motor body 1 is provided with heat-conducting plates, and the inner side of the waterproof shell 2 is provided with spiral heat dissipation fins 8 that are in contact with the heat-conducting plates. Heat is dissipated through the fins by air convection. The waterproof shell 2 adopts a split structure and is fixed by bolts. An annular groove 12 is opened on the end face of the motor body 1 near the motor shaft 11. A stainless steel sealing cylinder 3 is embedded in the annular groove 12. The other end of the sealing cylinder 3 is connected to the fixing frame 4. The fixing frame 4 is installed on the end face of the motor body 1 by guide rods 5 on both sides, and the motor shaft 11 passes through the center of the fixing frame 4. A sliding sleeve assembly 7 is provided on the fixing frame 4 located outside the sealing cylinder 3. When corrosive liquid seeps in, pressing the sliding sleeve assembly will wipe the surface of the sealing cylinder through the brush body of the inner ring of the arc-shaped pressure block. The structural design of the sliding sleeve assembly makes it convenient for a single operator to complete the cleaning operation. Combined with the spiral fin structure, the heat dissipation efficiency is improved, and overheating problems caused by sealing are avoided. The detachable waterproof shell reduces maintenance costs.

[0021] The outer layer of the waterproof shell 2 is coated with polytetrafluoroethylene (PTFE) with a thickness of 0.5 mm, which is resistant to acid and alkali corrosion. The inner layer of the waterproof shell 2 is coated with an antistatic coating. Flame-retardant and high-temperature resistant material is filled between the PTFE coating and the antistatic coating to form a multi-layer composite protective layer, which is suitable for highly corrosive environments. The joints of the waterproof shell 2 are filled with corrosion-resistant silicone to ensure the sealing of the joints.

[0022] The sliding sleeve assembly 7 includes a movable ring 71 that is slidably disposed on the outside of the sealing cylinder 3. Both ends of the movable ring 71 are sleeved on the guide rod 5. A first spring assembly 6 that is sleeved on the guide rod 5 is disposed between the movable ring 71 and the motor body 1. At least two sets of arc-shaped pressure rings 72 are disposed on the inner ring of the movable ring 71. A foldable protective cover 73 that is connected to the motor body 1 is disposed at the bottom of the movable ring 71.

[0023] An arc-shaped pressure ring 72 is embedded in a groove inside the movable ring 71. A second spring assembly 74 is provided on the end face of the arc-shaped pressure ring 72 and connected to the movable ring 71. A brush body is provided on the inner ring of the arc-shaped pressure ring 72. The brush body is made of a cloth or wiping material selected according to the corrosive liquid composition of the corresponding environment. A pressing block 721 is connected to the outer side of the arc-shaped pressure ring 72 and passes through the movable ring 71. The number of pressing blocks corresponds to the number of arc-shaped pressure blocks. The operator manually presses the pressing block to compress the second spring assembly so that the brush body of the arc-shaped pressure ring contacts the surface of the sealing cylinder. During the sliding process of the sliding sleeve assembly, the brush body removes the residual liquid on the surface of the sealing cylinder.

[0024] A guide groove 13 is provided on the end face of the motor body 1 near the sealing cylinder 3. The residual liquid removed by the brush body flows out from the guide groove. An inclined platform 31 is provided on the outer side of the sealing cylinder 3 near the motor body 1 to ensure that the residual liquid on the surface of the sealing cylinder is guided from the inclined platform to the guide groove.

[0025] The motor body 1 has a sealed modular circuit board structure. The connection between the circuit board structure and the wires is covered with a double-layer fluororubber tube and filled with epoxy resin to prevent liquid from seeping in. The temperature range is -40℃ to 150℃. The circuit board structure uses IP67-rated quick-connect connectors for external connection, which is convenient for replacement and has better corrosion resistance than marine welding connections.

[0026] The working principle of this embodiment is as follows: Under normal conditions, the elastic force of the first spring assembly presses the sliding sleeve assembly against the bottom of the fixed frame, and the folded protective cover under the movable ring stretches to cover the sealing cylinder. When cleaning is required, the operator manually presses the pressing block to make the brush body inside the arc-shaped pressing block contact the surface of the sealing cylinder. Then, a force is applied towards the motor body to compress the first spring assembly, exposing the sealing cylinder. At the same time, the brush body removes the residual liquid on the surface of the sealing cylinder. The liquid flows along the inclined platform to the guide groove. If the surface of the sealing cylinder is not cleaned, it can be wiped clean with other cloths.

[0027] Several points need to be clarified: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly, and can refer to mechanical or electrical connections, or internal connections between two components, or direct connections. Terms such as "upper," "lower," "left," and "right" are only used to indicate relative positional relationships, and the relative positional relationships may change when the absolute position of the described objects changes. Second, in this document, relational terms such as "first" and "second" are only used to distinguish one entity from another entity, and do not necessarily require or imply any such actual relationship or order between these entities.

[0028] The above examples are merely illustrative of this utility model and do not constitute a limitation on the scope of protection of this utility model. All designs that are the same as or similar to this utility model are within the scope of protection of this utility model.

Claims

1. A high-efficiency, corrosion-resistant, sealed stepper motor, comprising a removable waterproof housing (2) disposed on the outside of the motor body (1), characterized in that, The stator surface of the motor body (1) is provided with heat-conducting plates, and the inner side of the waterproof shell (2) is provided with spiral heat dissipation fins (8) that are in contact with the heat-conducting plates. The waterproof shell (2) adopts a split structure and is fixed by bolts. An annular groove (12) is opened on the end face of the motor body (1) near the motor shaft (11). A stainless steel sealing cylinder (3) is embedded in the annular groove (12). The other end of the sealing cylinder (3) is connected to the fixing frame (4). The fixing frame (4) is installed on the end face of the motor body (1) on both sides through guide rods (5), and the motor shaft (11) passes through the center of the fixing frame (4). A sliding sleeve assembly (7) located outside the sealing cylinder (3) is provided on the fixing frame (4).

2. A high-efficiency, corrosion-resistant, sealed stepper motor according to claim 1, characterized in that, The outer layer of the waterproof shell (2) is provided with a PTFE coating, the inner layer of the waterproof shell (2) is provided with an antistatic coating, the space between the PTFE coating and the antistatic coating is filled with a flame-retardant and high-temperature resistant material, and the joint of the waterproof shell (2) is filled with corrosion-resistant silicone.

3. A high-efficiency, corrosion-resistant, sealed stepper motor according to claim 1, characterized in that, The sliding sleeve assembly (7) includes a movable ring (71) that is slidably disposed on the outside of the sealing cylinder (3). The two ends of the movable ring (71) are sleeved on the guide rod (5). A first spring assembly (6) sleeved on the guide rod (5) is provided between the movable ring (71) and the motor body (1). At least two sets of arc-shaped pressure rings (72) are provided on the inner ring of the movable ring (71). A foldable protective cover (73) connected to the motor body (1) is provided at the bottom of the movable ring (71).

4. A high-efficiency, corrosion-resistant, sealed stepper motor according to claim 3, characterized in that, The arc-shaped pressure ring (72) is embedded in the groove inside the movable ring (71). The end face of the arc-shaped pressure ring (72) is provided with a second spring assembly (74) connected to the movable ring (71). The inner ring of the arc-shaped pressure ring (72) is provided with a brush body.

5. A high-efficiency, corrosion-resistant, sealed stepper motor according to claim 4, characterized in that, The outer side of the arc-shaped pressure ring (72) is connected to a pressing block (721) that passes through the movable ring (71).

6. A high-efficiency, corrosion-resistant, sealed stepper motor according to claim 1, characterized in that, A guide groove (13) is provided on the end face of the motor body (1) near the sealing cylinder (3), and an inclined platform (31) is provided on the outer side of the sealing cylinder (3) near the motor body (1).

7. A high-efficiency, corrosion-resistant, sealed stepper motor according to claim 1, characterized in that, The motor body (1) is equipped with a modular circuit board structure. The circuit board structure is fitted with a fluororubber tube at the connection point with the wires. The interior is filled with epoxy resin. The circuit board structure is connected to the outside using an IP67 quick-connect connector.

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