A blender torque sensor and a blender

Abstract

The application provides a blender torque sensor and a blender adopting the same, which comprises an elastic body, a strain gauge, an FCB and a cable assembly, the FCB is electrically connected with the strain gauge and the cable assembly respectively, the strain gauge and the FCB are arranged on the elastic body, the elastic body is provided with a mounting hole for accommodating and mounting a motor of the blender, the center line of the elastic body is coaxial with the central axis of the motor, and the connecting shaft of the motor is exposed from the lower end of the elastic body. The blender torque sensor integrates the sensor and the motor, i.e. the motor is directly mounted in the sensor, so that the structure of the combination of the sensor and the motor is simplified, the central axis of the motor is easily made to be coaxial with the center of the sensor, the accuracy and the sensitivity of the sensor are ensured, and the sensor can collect more accurate torque values when the motor rotates.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of sensors, in particular to a blender torque sensor and a blender. BACKGROUND

[0002] With the global epidemic impact, people have an unprecedented concern for the medical industry, and the blender for stirring the pharmaceutical formula has also developed rapidly with the explosive growth of the medical industry. The existing blender mainly includes a stirring rod, a motor driving the stirring rod to rotate, and a sensor responsible for collecting the torque value when the motor rotates. One end of the sensor is fixedly connected to the upper part of the motor, and the other end of the sensor is fixed on the installation table. When the motor rotates, a torque is generated, and the sensor senses the torque value.

[0003] However, the total assembly structure of the existing blender is relatively long. In order to obtain higher precision stirring data, the center position degree is required to be higher when assembling the motor, the sensor and the stirring rod, and the assembly difficulty is high. SUMMARY

[0004] The purpose of the present application is to provide a blender torque sensor and a blender to overcome the shortcomings of the prior art.

[0005] To achieve the above purpose, the technical scheme of the present application is as follows:

[0006] The present application discloses a blender torque sensor, comprising an elastic body, a strain gauge, an FCB and a cable assembly, the FCB is electrically connected to the strain gauge and the cable assembly respectively, the strain gauge and the FCB are arranged on the elastic body, the elastic body is provided with a mounting hole for accommodating and mounting a motor of the blender, the center line of the elastic body is coaxial with the center axis of the motor, and the connecting shaft of the motor is exposed from the lower end of the elastic body.

[0007] Preferably, the elastic body is a cylindrical structure as a whole, and the mounting hole is a circular hole distributed along the center line of the cylindrical structure.

[0008] Further preferably, the cylindrical structure comprises an insertion part, an accommodating part and a fixing part connected in sequence from top to bottom, the insertion part and the fixing part are flat cylindrical bodies respectively, the accommodating part is a long cylindrical body as a whole, the insertion part, the accommodating part and the fixing part are respectively provided with an insertion hole, an accommodating hole and an avoiding hole, the insertion hole, the accommodating hole and the avoiding hole are communicated in sequence, the insertion hole, the accommodating hole and the avoiding hole constitute the mounting hole, the front end cover of the motor is fixedly connected to the upper end surface of the fixing part, and the connecting shaft of the motor extends out of the elastic body through the avoiding hole.

[0009] More preferably, the diameter of the insertion hole is the same as that of the receiving hole, the diameter of the clearance hole is larger than the diameters of the insertion hole and the receiving hole, and the diameter of the clearance hole is smaller than the diameter of the motor housing.

[0010] More preferably, the receiving portion includes an upper strain region, a lower strain region, and a reinforcing region connecting the upper strain region and the lower strain region. The upper strain region and the lower strain region are each composed of a plurality of annularly distributed thin plates, and the reinforcing region is composed of a plurality of annularly distributed arc-shaped plates. One end of each of the plurality of thin plates constituting the upper strain region is connected to one end of each of the plurality of arc-shaped plates constituting the reinforcing region. The other end of each of the plurality of thin plates constituting the upper strain region is fixedly connected to the lower end face of the insertion portion. One end of each of the plurality of thin plates constituting the lower strain region is connected to one end of each of the plurality of arc-shaped plates constituting the reinforcing region. The other end of each of the plurality of thin plates constituting the lower strain region is fixedly connected to the upper end face of the fixing portion.

[0011] More preferably, the strain gauge is attached to the upper strain zone.

[0012] More preferably, the FCB is attached to the wall of the insertion hole.

[0013] More preferably, the front end cover of the motor is fixedly connected to the upper end face of the fixing part by bolts.

[0014] Preferably, the elastomer is provided with a cover.

[0015] More preferably, the outer periphery of the bottom end of the elastomer is connected to an overload protection pin, and the cover is provided with a through hole that allows the overload protection pin to pass through. There is a set deformation gap between the hole wall and the outer periphery of the overload protection pin.

[0016] The present invention also discloses a mixer, including a motor, a stirring rod connected to the motor, and the aforementioned mixer torque sensor, wherein the motor is installed in the mounting hole.

[0017] Compared with the prior art, the advantages of the present invention are as follows:

[0018] 1) The mixer torque sensor provided by the present invention integrates the sensor and the motor together, that is, the motor is directly installed inside the sensor. This simplifies the structure of the sensor and motor combination and makes it easy to make the central axis of the motor consistent with the central line of the sensor, thereby ensuring the accuracy and sensitivity of the sensor, so that the sensor can collect more accurate torque values ​​when the motor is rotating.

[0019] 2) This invention provides a high-precision strain gauge to ensure the accuracy of the sensor itself;

[0020] 3) The sensor provided by the present invention is densely equipped with overload protection pins to provide overload protection for the elastomer and prevent the elastomer from undergoing plastic deformation.

[0021] 4) Because the stirrer uses the aforementioned sensor, it can collect more accurate torque values ​​when the motor is rotating, resulting in higher measurement accuracy, better stability, and a wider measurement range. Furthermore, the assembly method of the motor and sensor simplifies the overall structure and makes it more aesthetically pleasing. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0023] Figure 1 This is a schematic diagram of the structure of the mixer torque sensor and motor disclosed in the embodiments of the present invention. Figure 1 ;

[0024] Figure 2 This is a schematic diagram of the structure of the mixer torque sensor and motor disclosed in the embodiments of the present invention. Figure 2 ;

[0025] Figure 3 This is a schematic diagram of the structure of the mixer torque sensor and motor disclosed in the embodiments of the present invention. Figure 1 (Remove the casing);

[0026] Figure 4 This is a schematic diagram of the structure of the mixer torque sensor and motor disclosed in the embodiments of the present invention. Figure 2 (Remove the casing);

[0027] Figure 5 This is a schematic diagram of the structure of the elastomer disclosed in the embodiments of the present invention. Detailed Implementation

[0028] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0029] Example 1:

[0030] See Figures 1-5 As shown, Embodiment 1 of the present invention discloses a mixer torque sensor, including an elastic body 1, a strain gauge 2, an FCB3, and a cable assembly. The FCB3 is electrically connected to the strain gauge 2 and the cable assembly respectively. The strain gauge 2 and the FCB3 are disposed on the elastic body 1. The elastic body 1 is provided with a mounting hole for accommodating and mounting a motor K of the mixer. The centerline of the elastic body 1 is the same as the center axis of the motor K. The connecting shaft K1 of the motor K protrudes from the lower end of the elastic body 1. The connecting shaft K1 of the motor K is connected to a stirring rod for stirring.

[0031] When the motor K is directly installed inside the sensor and fixed to the sensor, when the motor K stirs, the elastic body 1 of the sensor is deformed by the reaction torque of the stirring rod. After the strain gauge 2 senses the deformation, it will transmit the analog signal to the cable assembly through the Wheatstone bridge. Later, the cable assembly is converted to a digital amplifier and transmitted to the analysis instrument.

[0032] The mixer torque sensor provided in this embodiment integrates the sensor and motor K together, that is, the motor K is directly installed inside the sensor. This simplifies the structure of the sensor and motor K combination and makes it easy to make the central axis of the motor K consistent with the central line of the sensor, thereby ensuring the accuracy and sensitivity of the sensor and enabling the sensor to collect more accurate torque values ​​when the motor K rotates.

[0033] The elastic body 1 is a cylindrical structure with mounting holes distributed along the centerline of the cylindrical structure. The cylindrical structure includes an insertion part 11, a receiving part 12, and a fixing part 13 connected sequentially from top to bottom. The insertion part 11 and the fixing part 13 are flat cylindrical shapes, while the receiving part 12 is an elongated cylindrical shape. The insertion part 11, the receiving part 12, and the fixing part 13 are respectively provided with an insertion hole 14, a receiving hole 15, and a clearance hole 16. The insertion hole 14, the receiving hole 15, and the clearance hole 16 are sequentially connected, forming the aforementioned mounting holes. The front end cover of the motor K is fixedly connected to the upper end face of the fixing part 13 by bolts, and the connecting shaft K1 of the motor K extends out of the elastic body 1 through the clearance hole 16. The motor K is fixedly connected to the fixing part 13 of the elastic body 1 via its front end cover. The installation position is predetermined, thus easily ensuring that the centerline of the motor K is aligned with the centerline of the elastic body 1.

[0034] The insertion hole 14 and the receiving hole 15 have the same diameter, which makes it easy for the motor K to be inserted into the elastic body 1. The diameter of the clearance hole 16 is smaller than the diameter of the insertion hole 14 and the receiving hole 15, and the diameter of the clearance hole 16 is also smaller than the diameter of the outer shell of the motor K. This ensures that the upper end face of the fixing part 13 has enough fixing area for fixing the motor K.

[0035] The receiving portion 12 includes an upper strain region 121, a lower strain region 122, and a reinforcing region 123 connecting the upper strain region 121 and the lower strain region 122. The upper strain region 121 and the lower strain region 122 are each composed of multiple annularly distributed thin plates, and the reinforcing region 123 is composed of multiple annularly distributed arc-shaped plates. One end of the multiple thin plates constituting the upper strain region 121 is connected to one end of the multiple arc-shaped plates constituting the reinforcing region 123. The other end of the multiple thin plates constituting the upper strain region 121 is fixedly connected to the lower end face of the insertion portion 11. One end of the multiple thin plates constituting the lower strain region 122 is connected to one end of the multiple arc-shaped plates constituting the reinforcing region 123. The other end of the multiple thin plates constituting the lower strain region 122 is fixedly connected to the upper end face of the fixing portion 13.

[0036] In fact, during the processing, the thin plate is formed by cutting multiple waist-shaped grooves on the hollow cylindrical structure (accommodation part 12), and a thin plate is formed between two adjacent waist-shaped grooves. Multiple square grooves are cut on the hollow cylindrical structure (accommodation part 12), and a reinforcing area 123 is formed between two adjacent square grooves. This design facilitates the final processing and reduces processing costs.

[0037] The upper strain zone 121 and the lower strain zone 122 are made of multiple annularly distributed thin plates, which can ensure that the elastic body 1 undergoes elastic deformation under the action of external force and increase the sensitivity of the elastic body 1. The upper strain zone 121 and the lower strain zone 122 are connected by a reinforcing zone 123, which can increase the strength of the strain zone and prevent the elastic body 1 from undergoing plastic deformation and losing its effectiveness.

[0038] Strain gauge 2 is attached to the upper strain zone 121. Of course, strain gauge 2 can also be installed in the lower strain zone 122, or simultaneously in both the upper strain zone 121 and the lower strain zone 122. However, it is sufficient to install it only in the upper strain zone 121, which is convenient for installation. FCB3 is attached to the wall of the insertion hole 14, that is, FCB3 is arranged inside the arc-shaped insertion hole 14.

[0039] The elastomer 1 is externally protected by a cover 5, which also enhances its appearance. Overload protection pins 4 are connected to the outer periphery of the bottom end of the elastomer 1. Specifically, two opposing overload protection pins 4 are connected to the outer periphery of the fixing part of the elastomer 1. The cover 5 has a through hole 51 that allows the overload protection pins 4 to pass through, and a predetermined deformation gap exists between the hole wall of the through hole 51 and the outer periphery of the overload protection pin 4. Under 200% of the rated torque, the elastomer undergoes its maximum deformation. The position of the overload protection pins 4 changes with the deformation of the elastomer, eventually abutting against the inner wall of the through hole 51, thereby preventing further deformation of the elastomer 1. Thus, the overload protection pins 4 provide overload protection for the elastomer 1, preventing plastic deformation.

[0040] Example 2:

[0041] See Figures 1-5 As shown, Embodiment 2 of the present invention discloses a mixer, including a motor K, a stirring rod connected to the motor K, and the aforementioned mixer torque sensor. The motor K is installed in a mounting hole, which consists of an insertion hole 14, a receiving hole 15, and a clearance hole 16, as described above. Because this mixer uses the aforementioned sensor, it can collect more accurate torque values ​​when the motor rotates, resulting in higher measurement accuracy, better stability, and a wider measurement range. Furthermore, the assembly method of the motor and sensor simplifies the overall structure and improves the appearance.

[0042] Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A torque sensor for a mixer, characterized in that: The device includes an elastomer, a strain gauge, an FCB, and a cable assembly. The FCB is electrically connected to the strain gauge and the cable assembly. The strain gauge and the FCB are disposed on the elastomer. The elastomer has a mounting hole for accommodating and mounting a motor of a mixer. The centerline of the elastomer coincides with the center axis of the motor. The connecting shaft of the motor protrudes from the lower end of the elastomer. The elastomer is a cylindrical structure, and the mounting holes are circular holes distributed along the center line of the cylindrical structure. The cylindrical structure includes an insertion part, a receiving part, and a fixing part connected sequentially from top to bottom. The insertion part and the fixing part are both flat cylindrical shapes, and the receiving part is an elongated cylindrical shape. The insertion part, the receiving part, and the fixing part are respectively provided with an insertion hole, a receiving hole, and a clearance hole. The insertion hole, the receiving hole, and the clearance hole are connected in sequence and form the mounting hole. The front end cover of the motor is fixedly connected to the upper end face of the fixing part, and the connecting shaft of the motor extends out of the elastic body from the clearance hole. The insertion hole and the receiving hole have the same diameter, the clearance hole has a smaller diameter than the insertion hole and the receiving hole, and the clearance hole also has a smaller diameter than the motor housing. The receiving portion includes an upper strain region, a lower strain region, and a reinforcing region connecting the upper strain region and the lower strain region. The upper strain region and the lower strain region are each composed of multiple annularly distributed thin plates, and the reinforcing region is composed of multiple annularly distributed arc-shaped plates. One end of each of the multiple thin plates constituting the upper strain region is connected to one end of each of the multiple arc-shaped plates constituting the reinforcing region. The other end of each of the multiple thin plates constituting the upper strain region is fixedly connected to the lower end face of the insertion portion. One end of each of the multiple thin plates constituting the lower strain region is connected to one end of each of the multiple arc-shaped plates constituting the reinforcing region. The other end of each of the multiple thin plates constituting the lower strain region is fixedly connected to the upper end face of the fixing portion. The multiple annularly distributed thin plates in the upper and lower strain zones are formed by cutting multiple waist-shaped grooves in the receiving part of the hollow cylindrical structure, and a thin plate is formed between two adjacent waist-shaped grooves; the multiple annularly distributed arc-shaped plates in the reinforcing zone are formed by cutting multiple square grooves in the receiving part of the hollow cylindrical structure, and an arc-shaped plate is formed between two adjacent square grooves. The strain gauge is attached to the upper strain zone; The FCB is attached to the wall of the insertion hole; and / or, the front end cover of the motor is fixedly connected to the upper end face of the fixing part by bolts; The elastic body is provided with a cover, and an overload protection pin is connected to the outer periphery of the bottom end of the elastic body. The cover is provided with a through hole that allows the overload protection pin to pass through, and there is a set deformation gap between the hole wall and the outer periphery of the overload protection pin. The motor is directly installed inside the sensor, which simplifies the structure of the sensor and motor combination and ensures that the central axis of the motor is aligned with the central line of the sensor, thus guaranteeing the accuracy and sensitivity of the sensor.

2. A mixer, characterized in that: It includes a motor, a stirring rod connected to the motor, and a mixer torque sensor as described in claim 1, wherein the motor is mounted in the mounting hole.

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