Underwater holder and manufacturing method thereof

Abstract

The invention provides an underwater holder and a manufacturing method thereof. The underwater holder comprises a steering engine. The steering engine comprises a motor, a magnetic encoder and an output shaft. The motor comprises a motor end, and a motor shell air outlet is formed in the side face of the motor. The manufacturing method of the underwater holder comprises the steps that a steering engine is sealed for the first time, a strength enhancing layer is arranged on the surface of the steering engine subjected to primary sealing, and a potting layer is arranged on the outer surface of the strength enhancing layer. Primary sealing of the steering engine comprises the steps that the motor end is sealed through a motor end sealing piece; the magnetic encoder is sealed through a magnetic encoder sealing piece; the output shaft is sealed through an output shaft sealing piece; and the motor shell air outlet is sealed through the motor shell air outlet sealing element. The underwater cradle head provided by the invention is free of an outer layer metal shell and a watertight connecting piece, so that the production cost is reduced, seawater corrosion can be avoided, and the weight of the underwater cradle head can also be reduced.

Description

Technical Field

[0001] The present application relates to the technical field of pan / tilt platforms, and in particular, to an underwater pan / tilt platform and a method for manufacturing the same. Background Art

[0002] In the existing underwater pan / tilt technology, the potting method used in the underwater pan / tilt sealed in the potting manner is usually to pot the entire steering gear after the motor and other components are assembled. In addition, a hard anodized aluminum alloy shell needs to be installed outside the potting layer.

[0003] The inventor of the present application found that in the process of manufacturing an underwater gimbal with a hard anodized aluminum alloy shell on the outside, it is necessary to hollow out a whole piece of aluminum to make the shell, which consumes a lot of raw materials and has high processing costs. Once the oxide layer of the aluminum shell is damaged, the aluminum shell is easily corroded in seawater, affecting the reliability of the underwater gimbal. Moreover, the sealing method of potting potting glue used in the prior art does not provide sufficient protection for the internal rotating parts. The internal potting glue will affect the rotation of the rotating parts (for example, the output shaft, the motor rotor, etc.), thereby affecting the working efficiency of the internal servo.

[0004] The contents of the background technology section are merely the technologies known to the public and do not necessarily represent the existing technologies in the field. Summary of the invention

[0005] According to one aspect of the present application, a method for manufacturing an underwater pan-tilt is provided. The underwater pan-tilt comprises: a servo. The servo comprises: a motor, a magnetic encoder and an output shaft. The motor comprises: a motor end. A motor housing air outlet is provided on the side of the motor. The method for manufacturing the underwater pan-tilt comprises: initial sealing of the servo, providing a strength enhancement layer on the surface of the servo after initial sealing, and providing a potting layer on the outer surface of the strength enhancement layer. The initial sealing of the servo comprises: sealing the motor end with a motor end seal; sealing the magnetic encoder with a magnetic encoder seal; sealing the output shaft with an output shaft seal; and sealing the motor housing air outlet with a motor housing air outlet seal.

[0006] Optionally, sealing the motor end with a motor end seal comprises: pressurizing a first mold filled with pre-configured hardening mastic to obtain a motor end seal; and sealingly fixing the motor end seal onto the motor end.

[0007] Optionally, sealing the magnetic encoder with a magnetic encoder seal includes: pressurizing a second mold filled with pre-configured hardening putty to obtain a magnetic encoder seal; sealing and fixing the magnetic encoder seal to the top of the magnetic encoder, with the bottom edge of the magnetic encoder seal fitting against the upper surface of the reduction gearbox.

[0008] Optionally, sealing the output shaft by an output shaft seal includes: pressurizing a third mold filled with epoxy resin glue to obtain an output shaft seal; lubricating the inside of the output shaft seal; and sleeve the sealing ring and the lubricated output shaft seal onto the output shaft of the servo, with the sealing ring being arranged between the bottom of the servo and the output shaft seal.

[0009] Optionally, the motor housing air outlet seal is a metal sheet or a metal collar. Sealing the motor housing air outlet by the motor housing air outlet seal includes: sealing and fixing the metal sheet or the metal collar to the motor housing air outlet.

[0010] Optionally, the air outlet of the motor housing is sealed by a motor housing air outlet seal, including: sealing and fixing a stainless steel needle to the air outlet of the motor housing.

[0011] Optionally, after the servo is initially sealed, providing a strength enhancement layer on the surface of the servo includes: applying a pre-configured hardening putty to the surface of the servo after initial sealing; placing the servo into a fourth mold; and pressurizing and curing the fourth mold to obtain the strength enhancement layer.

[0012] Optionally, setting a potting layer on the outer surface of the strength enhancement layer includes: placing the servo with the strength enhancement layer on the surface into a fifth mold provided with a release agent; filling the fifth mold with epoxy resin glue; and pressurizing and curing the fifth mold to obtain the potting layer.

[0013] According to another aspect of the present application, an underwater pan-tilt platform is provided, which includes a servo. The servo includes a motor, a magnetic encoder and an output shaft. The motor includes a motor end. A motor housing air outlet is provided on the side of the motor. The underwater pan-tilt platform also includes: a motor end seal, which is arranged above the motor end; a magnetic encoder seal, which is arranged above the magnetic encoder; an output shaft seal, which is sleeved on the output shaft; a motor housing air outlet seal, which is arranged at the motor housing air outlet; a strength enhancement layer, which is arranged on the outer surface of the servo; and a potting layer, which is arranged on the outer surface of the strength enhancement layer.

[0014] This application has the following beneficial effects.

[0015] The present application provides a method for manufacturing an underwater pan-tilt head, which uses a seal to initially seal the motor end, magnetic encoder, output shaft and motor housing air outlet of the servo. A strength enhancement layer is provided on the outer surface of the servo after the initial sealing treatment. A potting layer is provided on the outer surface of the strength enhancement layer. The present application does not use a hard anodized aluminum alloy shell, which can reduce the weight of the underwater pan-tilt head and reduce production costs. The present application uses a seal to seal the rotating parts, reduces the effect of the potting glue on the internal rotating parts of the underwater pan-tilt head (such as the servo output shaft, motor rotor, etc.) when potting the servo, and improves the reliability of the seal. The present application sets a strength enhancement layer to improve the structural strength of the servo. Moreover, the strength enhancement layer can fix the components of the servo, thereby preventing the internal components of the servo from loosening and being damaged when the servo is subjected to impact force. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 A schematic structural diagram of a steering gear according to an embodiment of the present application from one perspective is shown;

[0018] Figure 2 A schematic structural diagram of a steering gear according to another embodiment of the present application is shown;

[0019] Figure 3 A disassembled diagram of a steering gear according to an embodiment of the present application is shown;

[0020] Figure 4 A schematic diagram showing a strength enhancement layer of an underwater gimbal according to an embodiment of the present application is shown;

[0021] Figure 5 A schematic diagram showing a potting layer of an underwater pan / tilt platform according to an embodiment of the present application is shown;

[0022] Figure 6 A schematic diagram showing the process of the underwater pan / tilt manufacturing method according to an embodiment of the present application is shown;

[0023] Figure 7 A schematic diagram of the process of step S100 of an embodiment of the present application is shown;

[0024] Figure 8 A schematic diagram of the process of step S110 of an embodiment of the present application is shown;

[0025] Fig. 9 A schematic flow chart of step S120 of an embodiment of the present application is shown.

[0026] Description of reference numerals:

[0027] Servo 10; motor 101; magnetic encoder 102; output shaft 103; motor end seal 104; magnetic encoder seal 105; output shaft seal 106; motor housing air outlet seal 107; strength enhancement layer 108; potting layer 109; motor end 1011; motor housing air outlet 1012. DETAILED DESCRIPTION

[0028] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this application will be comprehensive and complete and will fully convey the concepts of the example embodiments to those skilled in the art. The same reference numerals in the figures represent the same or similar parts, and thus their repeated description will be omitted.

[0029] The described features, structures or characteristics may be combined in one or more embodiments in any suitable manner. In the following description, many specific details are provided to provide a full understanding of the embodiments of the present disclosure. However, those skilled in the art will appreciate that the technical solutions of the present disclosure may be practiced without one or more of these specific details, or other modes, components, materials, devices, etc. may be adopted. In these cases, known structures, methods, devices, implementations, materials or operations will not be shown or described in detail.

[0030] In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units that are not listed, or may optionally include other steps or units that are inherent to these processes, methods, products or devices.

[0031] The terms "first", "second" and the like in the specification and claims of this application and the above drawings are used to distinguish different objects rather than to describe a specific order.

[0032] The following is a clear and complete description of the technical solution of the present application in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0033] According to an embodiment of the present application, Figures 1 to 5As shown, the underwater pan-tilt platform includes a steering gear 10. The steering gear 10 includes a motor 101, a magnetic encoder 102 and an output shaft 103. The motor 101 includes a motor end 1011. The side of the motor 101 is provided with a motor housing air outlet 1012.

[0034] The underwater pan / tilt platform further includes a motor end seal 104, a magnetic encoder seal 105, an output shaft seal 106, a motor housing air outlet seal 107, a strength enhancement layer 108 and a potting layer 109. The motor end seal 104 is arranged above the motor end 1011. The magnetic encoder seal 105 is arranged above the magnetic encoder 102. The output shaft seal 106 is sleeved on the output shaft 103. The motor housing air outlet seal 107 is arranged outside the motor housing air outlet 1012. The strength enhancement layer 108 is arranged on the outer surface of the servo 10. The potting layer 109 is arranged on the outer surface of the strength enhancement layer 108.

[0035] For example, the motor end seal 104 can be made of hardened glue. The motor shaft of the motor 101 extends from the motor end 1011. The motor shaft is a rotatable component. Before potting the servo 10, the motor end seal 104 is fixed above the motor end 1011 to seal the motor end 1011. This can prevent the potting glue from entering the gap between the motor end 1011 and the motor shaft, thereby preventing the potting glue from sticking to the motor shaft and affecting the rotation of the motor shaft. For example, the motor end seal 104 can be glued to the top of the motor end 1011 by glue.

[0036] For example, the magnetic encoder seal 105 can be made of hardened glue. The output shaft 103 of the servo 10 is connected to the magnetic encoder 102. The output shaft 103 of the servo 10 drives the rotating part of the magnetic encoder 102 to rotate. Before potting the servo 10, the magnetic encoder seal 105 is sealed and fixed above the magnetic encoder 102 to seal the magnetic encoder 102. In this way, the influence of the potting glue on the rotating part of the magnetic encoder 102 can be avoided. For example, the magnetic encoder seal 105 can be attached to the top of the magnetic encoder 102 by glue.

[0037] For example, the output shaft seal 106 can be made of epoxy resin glue. The output shaft 103 of the motor extends from the bottom of the steering gear 10. The portion of the output shaft 103 of the motor extending from the bottom of the steering gear 10 is connected to an external device. For example, the output shaft seal 106 is sleeved on the output shaft 103 to dynamically seal the output shaft 103. This can prevent water from entering the interior of the steering gear 10 from the gap between the output shaft 103 and the reduction box of the steering gear 10 during the underwater operation of the underwater pan / tilt platform, thereby protecting the motor.

[0038] For example, the motor housing air outlet seal 107 can be a metal sheet or a metal ring. The motor housing air outlet 1012 is provided on the motor 101 of the steering gear 10. The motor housing air outlet 1012 is connected to the rotor inside the motor 101. Before potting the steering gear 10, the motor housing air outlet seal 107 is sealed and fixed to the outside of the motor housing air outlet 1012. In this way, the potting glue can be prevented from sticking to the rotor inside the motor 101 during the potting of the steering gear 10, thereby avoiding the influence of the potting glue on the rotor inside the motor 101. For example, the motor housing air outlet seal 107 can be attached to the motor housing air outlet 1012 by glue.

[0039] For example, a strength enhancement layer 108 is provided on the outer surface of the servo 10. The strength enhancement layer 108 may be a hardening type glue. A potting layer 109 is provided on the outer surface of the strength enhancement layer 108. The potting layer 109 may be an epoxy resin glue. The strength enhancement layer 108 is wrapped around the surface of the servo 10. For example, in the case where the underwater gimbal is impacted, the strength enhancement layer 108 may fix the components inside the servo 10, thereby preventing the components inside the servo 10 from loosening and being damaged when the servo 10 is impacted. Moreover, the strength enhancement layer 108 may balance the internal pressure, and may reduce the risk of water pressure squeezing and damaging the external potting layer 109. The potting layer 109 may further seal the servo 10.

[0040] The underwater pan / tilt of the present embodiment is provided with different sealing components to seal the parts where the rotating components are located. This can prevent the potting glue from sticking to the rotating components during the potting of the servo 10, thereby preventing the potting glue from affecting the rotating components on the servo 10. The underwater pan / tilt of the present embodiment is provided with a strength enhancement layer 108 on the outer surface of the servo 10, thereby improving the structural strength of the servo 10. Moreover, the strength enhancement layer 108 can fix the components of the servo 10, thereby preventing the components inside the servo 10 from loosening and being damaged when the servo 10 is subjected to impact force. The underwater pan / tilt of the present embodiment is provided with a potting layer 109 on the outside of the strength enhancement layer 108, eliminating the outer metal shell and watertight connectors, reducing production costs, avoiding seawater corrosion, and reducing weight.

[0041] According to another embodiment of the present application, the present application also provides a method for manufacturing an underwater pan / tilt platform. Figure 6 As shown, the preparation method includes the following S100-S300:

[0042] In S100 , the steering gear 10 is initially sealed.

[0043] In S200 , after the initial sealing of the steering gear 10 , a strength reinforcing layer 108 is provided on the surface of the steering gear 10 .

[0044] In S300 , a potting layer 109 is disposed on the outer surface of the strength enhancement layer 108 .

[0045] According to an exemplary embodiment, in S100, the steering gear 10 is initially sealed. Figure 7 As shown, S100 may include S110 - S140 .

[0046] In S110 , the motor end 1011 is sealed by the motor end seal 104 .

[0047] In S120 , the magnetic encoder 102 is sealed by the magnetic encoder seal 105 .

[0048] In S130 , the output shaft 103 is sealed by the output shaft seal 106 .

[0049] In S140 , the motor housing air outlet 1012 is sealed by the motor housing air outlet seal 107 .

[0050] In S110, the motor end 1011 is sealed by the motor end seal 104. Figure 8 As shown, S110 may also include S111 and S112.

[0051] In S111 , the motor end seal 104 is prepared.

[0052] In S112 , the motor end seal 104 is sealed and fixed onto the motor end 1011 .

[0053] For example, in S111, a motor end seal 104 is prepared. The motor end seal 104 is prepared using a first mold. Before preparing the motor end seal 104, a hardening type clay is pre-configured. For example, the hardening type clay can be AB clay. The A clay and the B clay are mixed and kneaded evenly until they become soft to obtain a pre-configured hardening type clay. The hardening type clay pre-configured by the AB clay is filled into the assembled first mold. The first mold filled with the pre-configured hardening type clay is transferred to a press for pressurized curing to obtain the motor end seal 104.

[0054] In S112, the motor end seal 104 is sealed and fixed above the motor end 1011. For example, before fixing the motor end seal 104, the motor wire of the steering gear 10 is removed. The motor end 1011 is cleaned so that there is no impurities such as dust, oil stains, etc. on the surface of the motor end 1011. Optionally, the motor end seal 104 can be glued to the top of the motor end 1011.

[0055] In S120, the magnetic encoder 102 is sealed by the magnetic encoder seal 105. Fig. 9As shown, S120 may also include S121 and S122.

[0056] In S121 , the magnetic encoder seal 105 is prepared.

[0057] In S122 , the magnetic encoder seal 105 is sealed and fixed onto the magnetic encoder 102 .

[0058] For example, in S121, a magnetic encoder seal 105 is prepared. A second mold is used in the process of preparing the magnetic encoder seal 105, and the second mold includes a mold base, a mold frame and a mold cover. Before preparing the magnetic encoder seal 105, a hardening type glue is pre-configured. For example, the hardening type glue can be AB glue. Mix A glue and B glue and knead them evenly until they become soft to obtain the pre-configured hardening type glue. The mold frame is sleeved on the top of the mold base, and the pre-configured hardening type glue is filled into the mold base and then the mold is pressed on the top of the mold base. The second mold filled with the pre-configured hardening type glue is transferred to a press for pressurized curing to obtain the magnetic encoder seal 105.

[0059] In S122, the magnetic encoder seal 105 is sealed and fixed above the magnetic encoder 102. For example, before fixing the magnetic encoder seal 105, the drive plate of the steering gear 10 is removed. Optionally, the magnetic encoder seal 105 can be glued to the top of the motor end 1011.

[0060] In S130 , the output shaft 103 is sealed by the output shaft seal 106 .

[0061] For example, the inner surface of the third mold is cleaned to ensure that there is no impurities such as dust, grease, etc. on the inner surface of the third mold. Optionally, epoxy resin glue is evenly applied to the inner surface of the third mold and then filled with epoxy resin glue. After the epoxy resin glue filled in the third mold is cured, the output shaft seal 106 is obtained.

[0062] For example, grease is applied to the inner surface of the output shaft seal 106 , the seal ring is first sleeved onto the output shaft 103 of the motor, and then the output shaft seal 106 is sleeved onto the output shaft 103 of the steering gear 10 .

[0063] In S140 , the motor housing air outlet 1012 is sealed by the motor housing air outlet seal 107 .

[0064] Optionally, the motor housing air outlet seal 107 is a metal sheet or a metal collar. Before fixing the motor housing air outlet seal 107, clean the outer periphery of the motor housing air outlet 1012 to ensure that there is no dust, grease or other impurities around the outer periphery of the motor housing air outlet 1012. For example, the metal sheet or metal collar can be glued to the battery housing air outlet position by glue.

[0065] For example, the motor housing air outlet seal 107 can be a combination of at least two stainless steel needles and cotton thread. Two or more stainless steel needles can be fixed to the motor housing air outlet 1012 at intervals to cover the motor housing air outlet 1012. Optionally, the stainless steel needle can be glued to the air outlet of the motor housing. Optionally, the motor housing air outlet 1012 is tightly wrapped with cotton thread to wrap the stainless steel needle inside. Optionally, epoxy resin glue is evenly applied to the cotton thread to fix the cotton thread to the motor and the stainless steel needle.

[0066] According to an exemplary embodiment, in S200 , after the steering gear 10 is initially sealed, a strength enhancement layer 108 is provided on the surface of the steering gear 10 .

[0067] Optionally, the strength enhancement layer 108 is hardened mastic.

[0068] For example, before setting the strength enhancement layer 108, the outgoing cable of the servo 10 is connected to the servo 10. The hardening putty can be AB putty. Mix the A putty and the B putty evenly and knead them until they become soft to obtain the pre-configured hardening putty. Wrap the motor 101, circuit board and other parts of the servo 10 with the pre-configured hardening putty. Put the servo 10 into the fourth mold. Move the fourth mold to a press to apply pressure. After the pre-configured hardening putty inside the fourth mold is formed and cured, the strength enhancement layer 108 is obtained.

[0069] According to an example embodiment, in S300 , a potting layer 109 is disposed on an outer surface of the strength enhancement layer 108 .

[0070] For example, the inner surface of the fifth mold is cleaned by wiping with alcohol and a dust-free cloth. A mold release agent is sprayed on the inner surface of the fifth mold. A layer of epoxy resin glue is evenly applied in the fifth mold. The steering gear 10 with the strength enhancement layer 108 is placed in the fifth mold. The epoxy resin glue is filled into the fifth mold. The inside of the fifth mold is vacuumed to obtain a potting layer after the epoxy resin glue is cured.

[0071] The underwater gimbal manufacturing method of this embodiment is provided with different sealing components to seal the parts with rotating components. In this way, the potting glue can be prevented from sticking to the rotating components during the potting process of the servo 10, thereby reducing the influence of the potting glue on the rotating components. A strength enhancement layer 108 is provided on the outer surface of the servo 10, thereby improving the structural strength of the servo 10. Moreover, the strength enhancement layer 108 can fix the components of the servo 10, thereby preventing the components inside the servo 10 from loosening and being damaged when the servo 10 is subjected to impact force. A potting layer 109 is provided on the outside of the strength enhancement layer 108, eliminating the outer metal shell and watertight connectors, reducing production costs, reducing seawater corrosion, and also reducing the weight of the underwater gimbal.

[0072] Finally, it should be noted that the above are only preferred embodiments of the present application and are not intended to limit the present application. Although the present application is described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions of the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A method for manufacturing an underwater pan / tilt head, characterized in that: The underwater pan / tilt platform includes a steering gear, the steering gear includes a motor, a magnetic encoder and an output shaft, the motor includes a motor end, and a motor housing air outlet is provided on the side of the motor. The method includes: Initial sealing of the steering gear, including: Sealing the motor end by a motor end seal; Sealing the magnetic encoder by using a magnetic encoder seal; The output shaft is sealed by an output shaft seal; The motor housing air outlet is sealed by a motor housing air outlet seal; after the steering gear is initially sealed, a strength enhancement layer is provided on the surface of the steering gear; A potting layer is arranged on the surface of the strength enhancing layer.

2. The method according to claim 1, characterized in that: The step of sealing the motor end by using a motor end seal comprises: Pressurizing a first mold filled with a pre-configured hardening type cement to obtain the motor end seal; The motor end seal is sealingly fixed over the motor end.

3. The method according to claim 1, characterized in that: The method of sealing the magnetic encoder by using a magnetic encoder seal comprises: Pressurizing a second mold filled with a pre-configured hardening type cement to obtain the magnetic encoder seal; The magnetic encoder seal is sealed and fixed above the magnetic encoder, and the bottom edge of the magnetic encoder seal is in contact with the upper surface of the reduction box.

4. The method according to claim 1, characterized in that: The step of sealing the output shaft by using an output shaft seal comprises: Pressurizing the third mold filled with epoxy resin to obtain the output shaft seal; lubricating the inside of the output shaft seal; The sealing ring and the lubricated output shaft sealing member are sequentially sleeved onto the output shaft of the steering gear.

5. The method according to claim 1, characterized in that: The motor housing air outlet seal is a metal sheet or a metal ring. The method of sealing the air outlet of the motor housing by using the air outlet seal of the motor housing comprises: The metal sheet or metal ring is sealed and fixed to the air outlet of the motor housing.

6. The method according to claim 1, characterized in that: The method of sealing the air outlet of the motor housing by using the air outlet seal of the motor housing comprises: A stainless steel needle seal is fixed to the air outlet of the motor housing.

7. The manufacturing method according to claim 1, characterized in that: After the steering gear is initially sealed, a strength enhancement layer is provided on the surface of the steering gear, including: Applying the pre-configured hardening putty to the surface of the steering gear after the initial sealing; placing the steering gear into a fourth mold; The fourth mold is pressurized and cured to obtain the strength-enhanced layer.

8. The manufacturing method according to claim 1, characterized in that: A potting layer is provided on the outer surface of the strength enhancement layer, comprising: placing the steering gear with a strength enhancement layer on the surface into a fifth mold provided with a release agent; Filling the epoxy resin glue into the fifth mold; The fifth mold is pressurized and cured to obtain the potting layer.

9. An underwater pan / tilt head, characterized in that: The underwater pan / tilt head is made by the manufacturing method according to any one of claims 1 to 8, the underwater pan / tilt head comprises a servo, the servo comprises a motor, a magnetic encoder and an output shaft, the motor comprises a motor end, and a motor housing air outlet is provided on a side of the motor; The underwater pan / tilt platform also includes: A motor end seal, arranged above the motor end; A magnetic encoder seal, disposed above the magnetic encoder; An output shaft seal, sleeved on the output shaft; A motor housing air outlet seal, arranged outside the motor housing air outlet; A strength enhancement layer is provided on the outer surface of the steering gear; The potting layer is arranged on the outer surface of the strength enhancing layer.

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