Oil-immersed outdoor unit

Abstract

The utility model provides an oil-immersed outdoor unit, which relates to the technical field of roller shutter door motors and comprises a motor cylinder and a gear box, a motor shaft extending into the gear box is arranged on the motor cylinder, and the motor shaft is connected with an output shaft extending out of the gear box. A sealing ring is arranged at the joint of the gear box and the motor cylinder, a first framework oil seal is arranged at the joint of the gear box and the motor shaft, a second framework oil seal is arranged at the joint of the gear box and the output shaft, and the gear box is filled with lubricating oil. According to the oil-immersed outdoor unit, the gearbox is sealed through the framework oil seal and the sealing ring, then the gearbox is filled with lubricating oil, an oil seal structure is directly formed, the lubricating effect between the motor shaft and the output shaft is guaranteed, the service life is effectively prolonged, and safety and stability are better.

Description

Technical Field

[0001] This utility model relates to the field of roller shutter door motor technology, and in particular, it relates to an oil-immersed external motor. Background Technology

[0002] Currently, electric roller shutters are widely used in houses, warehouses, shops, etc. Among them, lifting doors are a type of industrial door used in industrial plants. Due to their high sealing and safety performance, they are widely used as factory gates. Lifting doors include a door body, a chain drive mechanism, and columns installed on both sides of the door body. The chain drive mechanism includes a drive motor and a chain. The chain is installed in the columns and fixedly connected to the door body. The drive motor drives the chain drive, thereby realizing the opening and closing action of the door components. Therefore, the drive motor of the lifting door is externally mounted, which is called an external motor or external motor in the industry.

[0003] One important performance aspect of sectional doors is improving speed and quality. Another important aspect is stability and service life. Nowadays, the requirements for high-speed, high-quality sectional doors are getting higher and higher, and the wear and tear on the external motor is becoming more and more serious, resulting in poorer stability and higher requirements for safety. The external motor uses gear meshing and deceleration, which requires lubrication at the gear meshing position. Current lubrication methods involve periodically adding lubricating oil or applying grease to the gears.

[0004] However, for doors in special industries, such as vault doors and cold storage doors, the quality of these doors has improved rapidly. As the current lubrication methods become more frequent, it becomes more difficult to ensure lubrication. The lifespan of the door is only six months to one year. At that time, wear and tear will increase, the lubrication at the meshing points will be completely worn away, and safety will not be guaranteed.

[0005] Therefore, in order to solve the above problems, it is necessary for us to design a reasonable and efficient oil-immersed external engine. Utility Model Content

[0006] The purpose of this utility model is to provide an oil-immersed external motor that uses a skeleton oil seal and sealing ring to seal the gearbox, and then fills the gearbox with lubricating oil to directly form an oil seal structure. This ensures the lubrication effect between the motor shaft and the output shaft, effectively extends the service life, and improves safety and stability.

[0007] To achieve the above objectives, this utility model employs the following technical solution:

[0008] An oil-immersed external motor includes a motor cylinder and a gearbox. The motor cylinder has a motor shaft extending into the gearbox, and the motor shaft is connected to an output shaft extending out of the gearbox. A sealing ring is provided at the connection between the gearbox and the motor cylinder, a first skeleton oil seal is provided at the connection between the gearbox and the motor shaft, and a second skeleton oil seal is provided at the connection between the gearbox and the output shaft. The gearbox is filled with lubricating oil.

[0009] As a preferred embodiment of this utility model, the output shaft is coaxially provided with an output gear, the motor shaft is connected to the output gear, and both the motor shaft and the output gear are provided with helical gear stripes.

[0010] As a preferred embodiment of this utility model, a speed reduction transition component is provided between the output shaft and the motor shaft. The speed reduction transition component includes a transition shaft and a transition gear coaxially arranged with the transition shaft. The transition gear is meshed with the motor shaft, and the transition shaft is meshed with the output gear. Both the transition shaft and the transition gear are provided with helical gear stripes.

[0011] As a preferred embodiment of this utility model, a first limiting bearing is provided at the end of the transition shaft away from the transition gear, a second limiting bearing is provided at the end of the transition gear away from the transition shaft, a first limiting cylinder is provided on the gearbox to facilitate the installation of the first limiting bearing, and a second limiting cylinder is provided on the motor cylinder to facilitate the installation of the second limiting bearing.

[0012] As a preferred embodiment of this utility model, the gearbox is connected to the motor cylinder by connecting bolts, and a sealing gasket is provided at the connection between the gearbox and the connecting bolts.

[0013] As a preferred embodiment of this invention, the number of connecting bolts is at least one, and the gearbox is provided with a bolt sleeve for facilitating the installation of the connecting bolts.

[0014] As a preferred embodiment of this invention, the gearbox is provided with a shaft sleeve for facilitating the installation of the output shaft; the bolt sleeve is connected to the shaft sleeve by reinforcing ribs.

[0015] As a preferred embodiment of the present invention, a top plate is provided on the side of the gearbox near the motor cylinder, and a bottom plate is provided on the side of the gearbox away from the motor cylinder. The top plate is provided with a motor shaft hole for facilitating the passage of the motor shaft, and the bottom plate is provided with an output shaft hole for facilitating the passage of the output shaft. The first skeleton oil seal is provided at the motor shaft hole, and the second skeleton oil seal is provided at the output shaft hole.

[0016] As a preferred embodiment of this invention, a functional gear is provided on the outer side of the output shaft, and the functional gear is meshed with an absolute encoder; the functional gear is located on the side of the second skeleton oil seal away from the motor shaft.

[0017] As a preferred embodiment of the present invention, the gearbox is provided with an encoder compartment for accommodating the absolute encoder.

[0018] As a preferred embodiment of this utility model, the gearbox is a one-piece molded part.

[0019] The beneficial effects of this utility model of an oil-immersed external motor are as follows: by using a skeleton oil seal and a sealing ring to seal the gearbox, and then filling the gearbox with lubricating oil, an oil seal structure is directly formed, ensuring the lubrication effect between the motor shaft and the output shaft, effectively extending the service life, and improving safety and stability.

[0020] The motor shaft and output shaft are connected by helical gear transmission, which makes the deceleration effect stable, has high overload capacity, low vibration and low noise. It can be used stably in various doors with high speed and large lifting capacity. In addition, the oil seal structure can provide stable and continuous lubrication for the helical gear structure, making it safer. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of one embodiment of an oil-immersed external mounting bracket according to the present invention;

[0022] Figure 2 This is a three-dimensional structural diagram of the overall structure of an oil-immersed external motor according to one embodiment of the present invention, with the gearbox in a transparent state.

[0023] Figure 3 This is a three-dimensional structural diagram of the gearbox in one embodiment of an oil-immersed external motor of the present invention;

[0024] In the diagram: 1. Motor cylinder, 11. Motor, 2. Gearbox, 21. First skeleton oil seal, 22. Second skeleton oil seal, 23. Sealing ring, 24. First limit cylinder, 25. Sealing gasket, 26. Bolt cylinder, 27. Shaft cylinder, 28. Reinforcing rib, 29. Encoder compartment, 3. Motor shaft, 4. Output shaft, 41. Output gear, 42. Functional gear, 43. Absolute encoder, 5. Reduction transition component, 51. Transition shaft, 52. Transition gear, 53. First limit bearing, 54. Second limit bearing. Detailed Implementation

[0025] The following are specific embodiments of the present invention, which further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0026] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement and steps of the modules and steps set forth in these embodiments do not limit the scope of the present invention.

[0027] At the same time, it should be understood that, for ease of description, the process shown in the attached diagram is not performed in isolation, but rather involves multiple steps that overlap.

[0028] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0029] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the invention or its application or use.

[0030] Techniques, methods, and systems known to those skilled in the art may not be discussed in detail, but where appropriate, they should be considered part of the specification.

[0031] Example 1: As Figures 1 to 3 The illustration shows only one embodiment of this utility model. An oil-immersed external motor includes a motor cylinder 1 and a gearbox 2. The motor cylinder 1 is provided with a motor shaft 3 extending into the gearbox 2. The motor shaft 3 is connected to an output shaft 4 extending out of the gearbox 2. A sealing ring 23 is provided at the connection between the gearbox 2 and the motor cylinder 1. A first skeleton oil seal 21 is provided at the connection between the gearbox 2 and the motor shaft 3. A second skeleton oil seal 22 is provided at the connection between the gearbox 2 and the output shaft 4. The gearbox 2 is filled with lubricating oil.

[0032] In this utility model, the entire external motor structure includes a motor cylinder 1 that houses the motor 11 and a gearbox 2 that reduces the speed of the motor 11. The gearbox 2 is connected to the motor cylinder 1. The motor cylinder 1 adopts a conventional motor cylinder 1 structure. The gearbox 2 has been improved. The motor shaft 3 of the motor 11 in the motor cylinder 1 extends from the motor cylinder 1 into the gearbox 2. The gearbox 2 is provided with an output shaft 4 that is connected to the motor shaft 3. The output shaft 4 extends out from the end of the gearbox 2 away from the motor cylinder 1 to drive the lifting door.

[0033] Here, a sealing ring 23 is first installed at the connection between gearbox 2 and motor cylinder 1 to provide annular sealing at the connection between gearbox 2 and motor cylinder 1; then, a first skeleton oil seal 21 is installed at the connection between gearbox 2 and motor shaft 3, and a second skeleton oil seal 22 is installed at the connection between gearbox 2 and output shaft 4, so that gearbox 2 is in a sealed state. Finally, lubricating oil is filled inside gearbox 2, and the entire transmission part in gearbox 2 is effectively oil-sealed for continuous and stable lubrication, which effectively extends the service life of the external motor and improves safety and stability.

[0034] Since both output shaft 4 and motor shaft 3 are rotating parts, the skeleton oil seal, which seals the output shaft 4 and motor shaft 3, is a representative seal widely used in rotating shaft parts. The skeleton oil seal is a type of seal and one of the commonly used sealing ring series. It is mainly used for sealing the oil in mechanical components. The skeleton oil seal is a component used to prevent oil from leaking from gaps in the machinery. The skeleton oil seal consists of three parts: the oil seal rubber elastomer, the reinforcing skeleton, and the self-tightening spring. The rubber elastomer consists of a bottom, a waist, a cutting edge, and a sealing lip. Usually, the actual inner diameter of the skeleton oil seal is smaller than the shaft diameter, with a certain "interference fit" to enable the skeleton oil seal to have sealing performance.

[0035] This invention seals the gearbox using a skeleton oil seal and a sealing ring, and then fills the gearbox with lubricating oil to directly form an oil seal structure. This ensures the lubrication effect between the motor shaft and the output shaft, effectively extends the service life, and improves safety and stability.

[0036] Example 2, still as Figures 1 to 3 As shown, this is only one embodiment of the present utility model. Based on the first embodiment, in the oil-immersed external motor of the present utility model, the output shaft 4 is coaxially provided with an output gear 41, the motor shaft 3 is connected to the output gear 41, and both the motor shaft 3 and the output gear 41 are provided with helical gear stripes; the outer diameter of the output gear 41 is larger than the outer diameter of the motor shaft 3.

[0037] The motor shaft and output shaft are driven by helical gears, which makes the deceleration effect stable, has a high overload capacity, low vibration and low noise, and can be used stably in various doors with high speed and large lifting mass.

[0038] To further reduce speed through helical gear transmission, a speed reduction transition piece 5 is provided between the output shaft 4 and the motor shaft 3. The speed reduction transition piece 5 includes a transition shaft 51 and a transition gear 52 coaxially arranged with the transition shaft 51. The transition gear 52 is meshed with the motor shaft 3, and the transition shaft 51 is meshed with the output gear 41. Both the transition shaft 51 and the transition gear 52 are provided with helical gear stripes.

[0039] Here, the outer diameter of the transition gear 52 is larger than the outer diameter of the motor shaft 3, and the outer diameter of the output gear 41 is larger than the outer diameter of the transition shaft 51.

[0040] In other words, two helical gear reductions are performed to effectively and stably reduce the high-speed rotation of the motor. At the same time, the helical gear reduction has a larger transmission torque, resulting in higher stability of the lifting door.

[0041] Furthermore, the oil seal structure can provide stable and continuous lubrication for the helical gear structure, resulting in higher safety.

[0042] In this utility model, a first limiting bearing 53 is provided at the end of the transition shaft 51 away from the transition gear 52, a second limiting bearing 54 is provided at the end of the transition gear 52 away from the transition shaft 51, a first limiting cylinder 24 is provided on the gearbox 2 to facilitate the installation of the first limiting bearing 53, and a second limiting cylinder is provided on the motor cylinder 1 to facilitate the installation of the second limiting bearing 54.

[0043] The motor cylinder 1 has a bottom surface near the gearbox 2, and the gearbox 2 has a bottom surface away from the motor cylinder 1. The gearbox 2 has an opening at the end near the motor cylinder 1. The first limiting cylinder 24 is located on the bottom surface of the gearbox near the motor cylinder 1, and the second limiting cylinder is located on the bottom plate of the motor cylinder near the gearbox.

[0044] The motor barrel base plate is connected to the gearbox 2, and the sealing ring 23 is set at the connection between the motor barrel base plate and the gearbox 2 for sealing.

[0045] Example 3, still as Figures 1 to 3 As shown, this is only one embodiment of the present utility model. Based on any of the above embodiments, in an oil-immersed external motor of the present utility model, the gearbox 2 is connected to the motor cylinder 1 by connecting bolts, and a sealing gasket 25 is provided at the connection between the gearbox 2 and the connecting bolts to prevent oil leakage from the gearbox 2 at the connecting bolts.

[0046] The number of connecting bolts is at least one, and the gearbox 2 is provided with a bolt sleeve 26 for facilitating the installation of the connecting bolt. In fact, the inside of the bolt sleeve 26 is connected to the outside of the gearbox 2, and the outside of the bolt sleeve 26 is the inside of the oil seal of the gearbox 2. That is, most of the connecting bolt is actually on the outside of the gearbox 2. After the connecting bolt passes through the bolt sleeve 26, it is inserted into the threaded groove on the bottom surface of the motor sleeve. The sealing washer 25 is located at the connection between the bolt sleeve 26 and the threaded groove.

[0047] In this utility model, the gearbox 2 is provided with a shaft sleeve 27 for facilitating the installation of the output shaft 4; the bolt sleeve 26 is connected to the shaft sleeve 27 by a reinforcing rib 28, and the bolt sleeve 26 is also connected to the first limiting sleeve 24 by a reinforcing rib 28, so that the entire gearbox 2 structure has higher strength and more stable structure.

[0048] In one embodiment of this utility model, the gearbox 2 is provided with a top plate on the side near the motor cylinder 1, and a bottom plate on the side away from the motor cylinder 1. The top plate is provided with a motor shaft hole for the motor shaft 3 to pass through, and the bottom plate is provided with an output shaft hole for the output shaft 4 to pass through. The first skeleton oil seal 21 is provided at the motor shaft hole, and the second skeleton oil seal 22 is provided at the output shaft hole.

[0049] In one embodiment of this utility model, a functional gear 42 is provided on the outer side of the output shaft 4, and the functional gear 42 is meshed with an absolute encoder 43; the functional gear 42 is located on the side of the second skeleton oil seal 22 away from the motor shaft 3, and the absolute encoder 43 limits the travel of the output shaft 4, that is, limits the upper and lower movement of the lifting door.

[0050] Of course, the gearbox 2 is provided with an encoder compartment 29 for accommodating the absolute encoder 43. The encoder compartment 29 is located outside the oil seal area of ​​the gearbox 2, and the encoder compartment 29 effectively protects the absolute encoder 43.

[0051] Finally, the gearbox 2 is a one-piece molded part. In fact, the gearbox 2 is a one-piece molded carbon steel alloy part, which has high shock resistance and bending resistance and good stability.

[0052] This utility model discloses an oil-immersed external motor. By using a skeleton oil seal and a sealing ring to seal the gearbox, and then filling the gearbox with lubricating oil, an oil seal structure is directly formed. This ensures the lubrication effect between the motor shaft and the output shaft, effectively extends the service life, and improves safety and stability.

[0053] This utility model is not limited to the specific embodiments described above, and various modifications and variations are possible. Any modifications, equivalent substitutions, or improvements made to the above embodiments based on the technical essence of this utility model should be included within the protection scope of this utility model.

Claims

1. An oil-immersed external motor, characterized in that: The device includes a motor cylinder (1) and a gearbox (2). The motor cylinder (1) is provided with a motor shaft (3) extending into the gearbox (2). The motor shaft (3) is connected to an output shaft (4) extending out of the gearbox (2). A sealing ring (23) is provided at the connection between the gearbox (2) and the motor cylinder (1). A first skeleton oil seal (21) is provided at the connection between the gearbox (2) and the motor shaft (3). A second skeleton oil seal (22) is provided at the connection between the gearbox (2) and the output shaft (4). The gearbox (2) is filled with lubricating oil.

2. The oil-immersed external motor according to claim 1, characterized in that: The output shaft (4) is coaxially provided with an output gear (41), the motor shaft (3) is connected to the output gear (41), and both the motor shaft (3) and the output gear (41) are provided with helical gear stripes.

3. The oil-immersed external motor according to claim 2, characterized in that: A speed reduction transition piece (5) is provided between the output shaft (4) and the motor shaft (3). The speed reduction transition piece (5) includes a transition shaft (51) and a transition gear (52) coaxially arranged with the transition shaft (51). The transition gear (52) is meshed with the motor shaft (3), and the transition shaft (51) is meshed with the output gear (41). Both the transition shaft (51) and the transition gear (52) are provided with helical gear stripes.

4. The oil-immersed external motor according to claim 3, characterized in that: A first limiting bearing (53) is provided at one end of the transition shaft (51) away from the transition gear (52), and a second limiting bearing (54) is provided at one end of the transition gear (52) away from the transition shaft (51). A first limiting cylinder (24) is provided on the gearbox (2) to facilitate the installation of the first limiting bearing (53), and a second limiting cylinder is provided on the motor cylinder (1) to facilitate the installation of the second limiting bearing (54).

5. The oil-immersed external motor according to claim 1, characterized in that: The gearbox (2) is connected to the motor cylinder (1) by connecting bolts, and a sealing gasket (25) is provided at the connection between the gearbox (2) and the connecting bolts.

6. The oil-immersed external motor according to claim 5, characterized in that: The number of connecting bolts is at least one, and the gearbox (2) is provided with a bolt sleeve (26) for facilitating the installation of the connecting bolts; the gearbox (2) is provided with a shaft sleeve (27) for facilitating the installation of the output shaft (4); the bolt sleeve (26) is connected to the shaft sleeve (27) by a reinforcing rib (28).

7. The oil-immersed external motor according to claim 1, characterized in that: The gearbox (2) has a top plate on the side near the motor cylinder (1) and a bottom plate on the side away from the motor cylinder (1). The top plate has a motor shaft hole for the motor shaft (3) to pass through, and the bottom plate has an output shaft hole for the output shaft (4) to pass through. The first skeleton oil seal (21) is located at the motor shaft hole, and the second skeleton oil seal (22) is located at the output shaft hole.

8. The oil-immersed external motor according to claim 1, characterized in that: A functional gear (42) is provided on the outside of the output shaft (4), and the functional gear (42) is meshed with an absolute encoder (43); the functional gear (42) is located on the side of the second skeleton oil seal (22) away from the motor shaft (3).

9. An oil-immersed external motor according to claim 8, characterized in that: The gearbox (2) is provided with an encoder compartment (29) for accommodating the absolute encoder (43).

10. An oil-immersed external motor according to claim 1, characterized in that: The gearbox (2) is a one-piece molded part.

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