Aerogel heat insulation coating production preparation device

Abstract

This invention discloses a preparation device for producing aerogel thermal insulation coating, belonging to the technical field of coating production equipment. It includes a preparation vessel with a hollow internal structure. A heating wire is fixedly connected to the inner side of the preparation vessel to control its internal temperature. A sealing cover is installed at the top of the preparation vessel. This invention utilizes planetary driven gears and crushing plates, among other components. The feeding sleeve drives the connecting support arm to rotate, and the meshing relationship between the planetary driven gears and the inner guide gear generates rotation. This allows the crushing plates to perform secondary crushing of the ejected powder outside the sieve branch seat. This device can achieve linkage between sieving and secondary crushing using the same power source, processing the powder into finer particles before it enters the mixing zone. This avoids the need for additional high-shear equipment due to powder agglomeration and reduces the possibility of coating adhering to the surface of the stirring components.

Description

Technical Field

[0001] This invention relates to the field of coating production equipment technology, and in particular to a preparation device for producing aerogel thermal insulation coatings. Background Technology

[0002] Aerogel is a three-dimensional porous network structure material formed by the aggregation of nanoscale particles. It possesses extremely high specific surface area (500–1200 m² / g), porosity (80%–99.8%), and extremely low thermal conductivity (0.013–0.020 W / m·K), making it one of the best-performing solid thermal insulation materials known to date. In recent years, aerogel powder has been composited with water-based or solvent-based materials to prepare thermal insulation coatings, which are widely used in building exterior walls, industrial pipelines, storage tanks, ship cabins, and battery compartments for new energy vehicles. These coatings offer significant advantages such as convenient construction, controllable thickness, and no thermal bridging effect. The conventional stirring methods used in existing preparation equipment are insufficient to provide strong enough shear force to break up agglomerates. On the other hand, using high-shear equipment such as high-speed dispersers or sand mills will damage the fragile nanoporous framework of aerogels. Furthermore, aerogels have a large specific surface area and strong adsorption capacity, making it easy for coatings to adhere to the inner wall of the tank and the surface of the stirring paddle during the mixing process. This not only causes material loss but also creates localized mixing dead zones, affecting batch consistency. Cleaning requires manual scraping, which is time-consuming and labor-intensive, and poses a risk of cross-contamination. Summary of the Invention

[0003] The purpose of this invention is to solve the problems in the prior art where the coating easily adheres to the inner wall of the tank and the surface of the stirring paddle during the mixing process, which not only causes material loss but also leads to local mixing dead zones, affecting batch consistency. The cleaning process requires manual scraping, which is time-consuming and labor-intensive, and poses a risk of cross-contamination. Therefore, this invention proposes a preparation device for the production of aerogel thermal insulation coating.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: A preparation apparatus for producing aerogel thermal insulation coating includes a preparation vessel with a hollow internal structure. A heating wire is fixedly connected to the inner side of the preparation vessel to control the internal temperature. A sealing cover is installed at the top of the preparation vessel, and a feed sleeve is rotatably connected to the inner side of the sealing cover. The feed sleeve is inserted downward into the inner side of the preparation vessel and has an opening at its top for feeding material. A sieve branch seat is fixedly connected to the bottom of the feed sleeve, and a filter screen is fixedly connected inside the sieve branch seat for crushing the material entering the feed sleeve. Screening grooves are arranged in a ring array on the outer wall of the sieve branch seat for discharging powdered material.

[0005] Preferably, a supporting base plate is fixedly connected to the outer wall of the preparation vessel. The supporting base plate has an annular structure, and an unfolding push rod is fixedly connected to the top surface of the supporting base plate. The unfolding push rod is arranged longitudinally.

[0006] Preferably, there are two unfolding push rods, which are symmetrically fixed on the left and right sides of the top surface of the support base plate. The pads of the two unfolding push rods are also fixedly connected to the support top plate, which is fixedly set on the outer wall of the sealing cover plate.

[0007] Preferably, a sealing insert is fixedly connected to the bottom end of the sealing cover plate. The sealing insert plate has an annular structure and is used to insert into the top opening of the preparation vessel. A connecting frame is fixedly connected to the top surface of the sealing cover plate. The connecting frame has a U-shaped structure with a one-way opening at the bottom.

[0008] Preferably, an input motor is fixedly connected to the outer side of the connecting frame, a drive bevel gear is mounted on the output shaft of the input motor, a driven bevel gear is meshed with the outer side of the drive bevel gear, and the driven bevel gear is fixedly disposed on the outer wall of the feed sleeve.

[0009] Preferably, a fixing ring seat is fixedly connected to the inner side of the sealing cover plate, and an inner guide gear is fixedly connected in an annular array on the inner wall of the fixing ring seat. Two connecting arms are fixedly connected to the outer wall of the feed sleeve, and a planetary driven gear is coaxially installed at the bottom end of the connecting arms.

[0010] Preferably, there are two planetary driven gears, both of which mesh with the inner guide gear for transmission, and the bottom end of each planetary driven gear is coaxially fixedly connected to a support base.

[0011] Preferably, a crushing plate is fixedly connected in a ring array on the outer wall of the support base. The crushing plate is located on the outside of the screen branch and is used to crush the powder.

[0012] Preferably, a connecting bushing is coaxially fixedly connected to the bottom end of the support base, and a mixing component is fixedly connected to the outer wall of the connecting bushing. The mixing component has an arc-shaped structure and is used to stir the aerogel insulation material.

[0013] Preferably, a support leg is fixedly connected to the bottom end of the preparation vessel, and a ring-shaped reinforcement is fixedly connected to the outer side of the support leg. A feeding pipe is fixedly connected to the bottom end of the preparation vessel, and a servo motor is fixedly connected to the outer wall of the feeding pipe. A feeding valve plate is installed on the output shaft of the servo motor.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. In this invention, by setting up components such as a sieve branch seat and a sieve trough, the centrifugal force generated by the rotation of the sieve branch seat driven by the feed sleeve enables the filter screen to crush the material and the powder material to be evenly thrown out into the preparation vessel through the sieve trough. This device can replace the traditional direct feeding method by rotating and centrifugally throwing out the powder material, so that the powder material is initially dispersed before entering the mixing area, which solves the problem of easy agglomeration and uneven dispersion of powder material during feeding.

[0015] 2. In this invention, by setting up components such as planetary driven gears, internal guide gears, and crushing plates, the connecting support arm is driven to revolve through the feed sleeve, and the rotation is generated by the meshing relationship between the planetary driven gears and the internal guide gears, so that the crushing plates can perform secondary crushing on the powder thrown out on the outside of the screen branch seat. This device can realize the linkage of screening and secondary crushing using the same power source, so that the powder is processed into finer particles before entering the mixing area, avoiding the need to add additional high-shear equipment due to powder agglomeration, and reducing the possibility of coating adhering to the surface of the stirring components. It solves the problems of fine agglomerates still existing in the powder after screening and local mixing dead zones caused by coating adhesion during the mixing process.

[0016] 2. In this invention, by setting up components such as an unfolding push rod and a sealing insert plate, the unfolding push rod longitudinally pushes the supporting top plate to drive the sealing cover plate to rise and fall, so that the sealing insert plate can be inserted into or detached from the top opening of the preparation vessel. This device can realize the automatic opening and closing and sealing of the preparation vessel, so that when the operator needs to clean the inside of the vessel, there is no need to manually scrape. The operator can simply control the unfolding push rod to lift the sealing cover plate and rinse or repair the internal components. This solves the problem that traditional equipment cleaning requires manual scraping, which is time-consuming, labor-intensive, and poses a risk of cross-contamination. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the front view of the preparation device for producing aerogel thermal insulation coating proposed in this invention after sectional cutting. Figure 2 This is a schematic diagram of the overall front view of the preparation device for producing aerogel thermal insulation coating proposed in this invention. Figure 3 This is a schematic diagram of the fixed ring seat and inner guide tooth assembly structure of a preparation device for producing aerogel thermal insulation coating proposed in this invention. Figure 4 This is a top view schematic diagram of the overall structure of the preparation device for producing aerogel thermal insulation coating proposed in this invention; Figure 5 This is a schematic diagram of the combined structure of the preparation vessel and the feeding pipe of a preparation device for producing aerogel thermal insulation coatings proposed in this invention. Figure 6This is a schematic diagram of the overall top and side view of the preparation device for producing aerogel thermal insulation coating proposed in this invention. Figure 7 This invention provides a preparation apparatus for producing aerogel thermal insulation coatings. Figure 2 Enlarged structural diagram at point A in the middle; Figure 8 This invention provides a preparation apparatus for producing aerogel thermal insulation coatings. Figure 6 Enlarged structural diagram at point B.

[0018] In the diagram: 1. Preparation vessel body; 101. Support leg; 1011. Reinforcing member; 2. Feeding pipe; 201. Servo motor; 2011. Feeding valve plate; 3. Supporting base plate; 301. Unfolding push rod; 4. Sealing cover plate; 401. Sealing insert plate; 4011. Supporting top plate; 5. Connecting frame; 501. Input motor; 5011. Drive bevel gear; 5012. Feeding sleeve; 5013. Driven bevel gear; 5014. Screening branch seat; 5015. Screening trough; 6. Fixing ring seat; 601. Inner guide gear; 6011. Connecting support arm; 6012. Planetary driven gear; 6013. Supporting base; 6014. Crushing plate; 6015. Connecting bushing; 6016. Mixing component. Detailed Implementation

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

[0020] Example, refer to Figure 1 - Figure 8A preparation apparatus for producing aerogel thermal insulation coating includes a preparation vessel 1, which has an internal hollow structure. A heating wire is fixedly connected to the inner side of the preparation vessel 1 to control the internal temperature of the preparation vessel 1. A sealing cover 4 is installed at the top of the preparation vessel 1, and a feed sleeve 5012 is rotatably connected to the inner side of the sealing cover 4. The feed sleeve 5012 is inserted downward into the inner side of the preparation vessel 1. An opening is provided at the top of the feed sleeve 5012 for feeding material. A sieve branch seat 5014 is fixedly connected to the bottom of the feed sleeve 5012. A filter screen is fixedly connected inside the sieve branch seat 5014 for crushing the material entering the feed sleeve 5012. Screening grooves 5015 are arranged in a ring array on the outer wall of the sieve branch seat 5014. The screening grooves 5015 are used for... To discharge powdered materials, a supporting base plate 3 is fixedly connected to the outer wall of the preparation vessel 1. The supporting base plate 3 has a ring structure, and an unfolding push rod 301 is fixedly connected to the top surface of the supporting base plate 3. The unfolding push rod 301 is arranged longitudinally, which realizes the control of the internal temperature of the preparation vessel 1 by heating wire, and feeding through the opening at the top of the feeding sleeve 5012. The material is crushed by the filter screen in the sieve branch seat 5014, and then the powdered material is evenly discharged through the sieve trough 5015, thereby solving the problem of easy agglomeration and uneven dispersion of powder. There are two unfolding push rods 301, which are symmetrically fixed on the left and right sides of the top surface of the supporting base plate 3. The pads of the two unfolding push rods 301 are also fixedly connected to a supporting top plate 4011, which is fixedly set on the outer wall of the sealing cover plate 4.

[0021] Furthermore, a sealing insert plate 401 is fixedly connected to the bottom end of the sealing cover plate 4. The sealing insert plate 401 has an annular structure and is used to insert into the top opening of the preparation vessel 1. A connecting frame 5 is fixedly connected to the top surface of the sealing cover plate 4. The connecting frame 5 has a U-shaped structure with a one-way opening at the bottom end. An input motor 501 is fixedly connected to the outside of the connecting frame 5. A drive bevel gear 5011 is mounted on the output shaft of the input motor 501. A driven bevel gear 5013 meshes with the outside of the drive bevel gear 5011. The driven bevel gear 5013 is fixedly set at the top opening of the preparation vessel 1. The outer wall of the feed sleeve 5012 enables the longitudinal pushing of the support top plate 4011 by the unfolding push rod 301 on the support base plate 3, thereby driving the sealing cover plate 4 to rise and fall smoothly, which facilitates the opening and closing of the preparation vessel 1 and solves the problem of difficult and inconvenient operation when opening the vessel sealing cover. The inner side of the sealing cover plate 4 is fixedly connected to the fixing ring seat 6, and the inner wall of the fixing ring seat 6 is fixedly connected to the inner guide gear 601 in a ring array. The outer wall of the feed sleeve 5012 is fixedly connected to two connecting arms 6011, and the bottom end of the connecting arms 6011 is coaxially mounted with a planetary driven gear 6012.

[0022] Furthermore, there are two planetary driven gears 6012, both of which mesh with the inner guide gear 601 for transmission. The bottom end of the planetary driven gear 6012 is coaxially fixedly connected to the support base 6013, which realizes the synchronous pushing of the support top plate 4011 by two symmetrically arranged unfolding push rods 301, so that the sealing cover plate 4 is subjected to uniform force during the lifting and lowering process, avoiding the cover plate tilting and jamming, and solving the problem of poor stability during the opening process. The outer wall of the support base 6013 is fixedly connected with a ring array of crushing plates 6014. The crushing plates 6014 are located outside the screen branch seat 5014 and are used to crush the powder.

[0023] Furthermore, a connecting bushing 6015 is coaxially fixedly connected to the bottom end of the support base 6013. A mixing component 6016 is fixedly connected to the outer wall of the connecting bushing 6015. The mixing component 6016 has an arc-shaped structure and is used to stir the aerogel insulation material. This enables the use of the annular sealing insert 401 at the bottom end of the sealing cover plate 4 to insert into the top opening of the preparation vessel 1, ensuring the sealing of the vessel. At the same time, the connecting frame 5 provides motor mounting support for the U-shaped structure, solving the problems of poor sealing and insufficient structural support of the vessel. A support leg 101 is fixedly connected to the bottom end of the preparation vessel 1. A ring-shaped reinforcement 1011 is fixedly connected to the outer side of the support leg 101. A discharge pipe 2 is fixedly connected to the bottom end of the preparation vessel 1. A servo motor 201 is fixedly connected to the outer wall of the discharge pipe 2. A discharge valve plate 2011 is installed on the output shaft of the servo motor 201.

[0024] In use, firstly, activate the two expansion push rods 301 on the support base plate 3. The telescopic ends of the expansion push rods 301 drive the sealing cover plate 4 upward through the support top plate 4011, causing the annular sealing insert plate 401 at the bottom of the sealing cover plate 4 to detach from the top opening of the preparation vessel 1. At this time, the interior of the preparation vessel 1 is open. The operator puts the aerogel powder material and base material into the top opening of the feed sleeve 5012. Then, the expansion push rods 301 reverse their movement, re-inserting the sealing insert plate 401 into the top opening of the preparation vessel 1, completing the sealing of the preparation vessel 1. At this time, the entire preparation vessel 1 forms a relatively closed mixing space, preparing for subsequent heating and stirring. The heating wire inside the preparation vessel 1 starts to work, controlling the temperature of the internal environment of the vessel to ensure that the aerogel coating is mixed under suitable temperature conditions. The setting of the heating wire enables the preparation vessel 1 to maintain a stable process temperature, avoiding the problem of unstable coating performance due to temperature fluctuations. The input motor 501 on the outside of the connecting frame 5 is started. The output shaft of the input motor 501 drives the drive bevel gear 5011 to rotate. The drive bevel gear 5011 drives the driven bevel gear 5013 to rotate through meshing. The driven bevel gear 5013 drives the feed sleeve 5012 fixed to it to rotate inside the sealing cover plate 4. As the core component of the entire power transmission, the rotation of the feed sleeve 5012 transmits the power provided by the input motor 501 downward to the various actuators inside the preparation vessel 1. The sieve branch seat 5014 at the bottom of the feed sleeve 5012 rotates synchronously. The filter screen inside the sieve branch seat 5014 falls from the opening at the top of the feed sleeve 5012. The material is initially crushed to break up the agglomerated powder into smaller particles. The crushed powder is thrown towards the outer wall of the sieve branch seat 5014 under centrifugal force, and is evenly thrown into the interior of the preparation vessel 1 through the screening grooves 5015 opened on the outer wall of the sieve branch seat 5014. This rotational centrifugal throwing method allows the powder to enter the preparation vessel 1 in a dispersed state, avoiding the local accumulation phenomenon caused by a large amount of powder being concentrated in the same position. At the same time, since the screening grooves 5015 are distributed in a ring array on the outer wall of the sieve branch seat 5014, the powder can be thrown outward from multiple directions at the same time, further improving the uniformity of material distribution. During the rotation of the feed sleeve 5012, the two connecting arms 6011 fixed to the outer wall of the feed sleeve 5012 rotate together with the feed sleeve 5012. The connecting arms 6011 drive the planetary driven gear 6012 at its bottom end to revolve around the axis of the feed sleeve 5012. Since the planetary driven gear 6012 meshes with the inner guide gear 601 on the inner wall of the fixed ring seat 6, the planetary driven gear 6012 is forced to rotate on its own axis while revolving. This motion of revolution plus rotation is the core of the entire internal transmission mechanism. The planetary driven gear 6012 drives the crushing plate 6014 to rotate through the support base 6013 at its bottom end. The crushing plate 6014 located outside the screen branch seat 5014 crushes the powder thrown out from the screening trough 5015. The powder material undergoes secondary crushing to prevent it from agglomerating again after leaving the screening tank 5015. The crushing plates 6014 are arranged in a ring array on the outer wall of the support base 6013. The simultaneous rotation of multiple crushing plates 6014 creates a continuous and dense crushing zone around the screening base 5014, ensuring that every stream of powder ejected from the screening tank 5015 is effectively impacted by the crushing plates 6014. After secondary crushing, the powder material continues to diffuse towards the lower part of the preparation vessel 1 under the combined action of centrifugal force and gravity. At this point, the powder material has undergone three processing steps: initial crushing by the filter screen, centrifugal ejection from the screening tank 5015, and secondary crushing by the crushing plates 6014. The dispersion of the material reaches an ideal mixing state. The support base 6013 drives the arc-shaped mixing component 6016 to rotate inside the preparation vessel 1 via the connecting bushing 6015 at its bottom. The arc-shaped design of the mixing component 6016 generates a large stirring range and a strong material pushing effect during rotation. The mixing component 6016 thoroughly mixes the crushed and dispersed aerogel powder and the base material, forming a uniform mixture inside the preparation vessel 1. During rotation, the arc-shaped mixing component 6016 agitates the material at the bottom of the preparation vessel 1 upwards while guiding the material at the top downwards, creating a three-dimensional material circulation flow inside the preparation vessel 1. This flow method effectively avoids material stagnation. The settling and stratification of the materials are observed. Simultaneously, heating wires inside the preparation vessel 1 continuously control the temperature of the mixture to maintain the required process temperature conditions for coating preparation. The heat output of the heating wires can be adjusted according to different stages of the preparation process, ensuring that the temperature inside the preparation vessel 1 remains within a suitable range. The finished coating is temporarily stored at the bottom of the preparation vessel 1. When it is time to discharge the coating, the servo motor 201 on the outer wall of the discharge pipe 2 is activated. The servo motor 201 drives the discharge valve plate 2011 to rotate to the open position, allowing the prepared coating to be smoothly discharged from the discharge pipe 2 at the bottom of the preparation vessel 1. After discharge is complete, the servo motor 201 reverses direction, driving the discharge valve plate 2011 to rotate to the closed position, awaiting the next batch of production.Throughout the entire operation, the power from the input motor 501 is transmitted to the feed sleeve 5012 via the meshing of the driving bevel gear 5011 and the driven bevel gear 5013. The feed sleeve 5012 then drives the screen branch seat 5014 to rotate and screen. Simultaneously, the connecting support arm 6011 and the planetary driven gear 6012 drive the crushing plate 6014 and the mixing component 6016 for secondary crushing and mixing. This achieves the coordinated operation of multiple actuators driven by a single power source, improving energy efficiency and equipment integration.

[0025] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An aerogel thermal insulation coating production preparation device, comprising a preparation kettle body (1), characterized in that, The preparation vessel (1) has an internal hollow structure. A heating wire is fixedly connected to the inner side of the preparation vessel (1) to control the internal temperature of the preparation vessel (1). A sealing cover plate (4) is installed at the top of the preparation vessel (1). A feed sleeve (5012) is rotatably connected to the inner side of the sealing cover plate (4). The feed sleeve (5012) is inserted downward and placed inside the preparation vessel (1). An opening is provided at the top of the feed sleeve (5012) for feeding. A sieve branch seat (5014) is fixedly connected to the bottom of the feed sleeve (5012). A filter screen is fixedly connected inside the sieve branch seat (5014) for crushing the material entering the feed sleeve (5012). A sieve slot (5015) is arranged in a ring array on the outer wall of the sieve branch seat (5014) for discharging powder material.

2. The preparation apparatus for producing aerogel thermal insulation coating according to claim 1, characterized in that, A support base plate (3) is fixedly connected to the outer wall of the preparation vessel (1). The support base plate (3) has a ring structure. An unfolding push rod (301) is fixedly connected to the top surface of the support base plate (3). The unfolding push rod (301) is arranged longitudinally.

3. The preparation apparatus for producing aerogel thermal insulation coating according to claim 2, characterized in that, There are two unfolding push rods (301). The two unfolding push rods (301) are symmetrically fixed on the left and right sides of the top surface of the support base plate (3). The pads of the two unfolding push rods (301) are also fixedly connected to the support top plate (4011). The support top plate (4011) is fixedly set on the outer wall of the sealing cover plate (4).

4. The preparation apparatus for producing aerogel thermal insulation coating according to claim 1, characterized in that, The bottom end of the sealing cover (4) is fixedly connected to a sealing insert (401). The sealing insert (401) is an annular structure. The sealing insert (401) is used to insert into the top opening of the preparation vessel (1). The top surface of the sealing cover (4) is fixedly connected to a connecting frame (5). The connecting frame (5) is a U-shaped structure with a one-way opening at the bottom.

5. The preparation apparatus for producing aerogel thermal insulation coating according to claim 4, characterized in that, An input motor (501) is fixedly connected to the outside of the connecting frame (5). A drive bevel gear (5011) is installed on the output shaft of the input motor (501). A driven bevel gear (5013) meshes with the outside of the drive bevel gear (5011). The driven bevel gear (5013) is fixedly installed on the outer wall of the feed sleeve (5012).

6. The preparation apparatus for producing aerogel thermal insulation coating according to claim 1, characterized in that, The inner side of the sealing cover plate (4) is fixedly connected to a fixing ring seat (6), and the inner wall of the fixing ring seat (6) is fixedly connected to an inner guide gear (601) in an annular array. The outer wall of the feed sleeve (5012) is fixedly connected to two connecting arms (6011), and the bottom end of the connecting arms (6011) is coaxially mounted with a planetary driven gear (6012).

7. The preparation apparatus for producing aerogel thermal insulation coating according to claim 6, characterized in that, There are two planetary driven gears (6012), and both planetary driven gears (6012) mesh with the inner guide gear (601) for transmission. The bottom end of each planetary driven gear (6012) is coaxially fixedly connected to a support base (6013).

8. The preparation apparatus for producing aerogel thermal insulation coating according to claim 7, characterized in that, The outer wall of the support base (6013) is fixedly connected with a ring array of crushing plates (6014). The crushing plates (6014) are located outside the screen branch seat (5014) and are used to crush powder.

9. The preparation apparatus for producing aerogel thermal insulation coating according to claim 8, characterized in that, The bottom end of the support base (6013) is coaxially fixedly connected to a connecting bushing (6015), and a mixing component (6016) is fixedly connected to the outer wall of the connecting bushing (6015). The mixing component (6016) has an arc-shaped structure and is used to stir the aerogel insulation material.

10. The preparation apparatus for producing aerogel thermal insulation coating according to claim 1, characterized in that, The bottom end of the preparation vessel (1) is fixedly connected to a support leg (101), and the outer side of the support leg (101) is fixedly connected to a ring-shaped reinforcement member (1011). The bottom end of the preparation vessel (1) is fixedly connected to a feeding pipe (2), and a servo motor (201) is fixedly connected to the outer wall of the feeding pipe (2). A feeding valve plate (2011) is installed on the output shaft of the servo motor (201).

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