Device for detecting strength of screw shaft of juicer

Abstract

The invention discloses a strength detection device for a spiral shaft of a juicer, and mainly relates to the technical field of shaft detection. Comprising a main machine and an installation frame, a rotary disc is rotatably installed on the installation frame, the rotary disc is driven to rotate based on an output motor installed in the main machine, the output motor is matched with a torsion sensor, the rotary disc is used for coaxially fixing a spiral shaft to be detected, and vertical frames extending vertically are symmetrically arranged on the two sides of the rotary disc. A third sliding rail and a third sliding block are installed on the vertical frames, a connecting base is fixed to the third sliding block, a rotating base rotationally connected relative to the connecting base is arranged on the connecting base, a connector with a connecting hole is fixed to the rotating base, a pressing rod is arranged between the two vertical frames, and the two ends of the pressing rod penetrate through the installing holes in the same side respectively. The peripheral face of the pressing rod is used for making contact with the surface of the spiral shaft blade. The device has the beneficial effects that multi-angle strength detection of the blades of the spiral shaft can be realized, the device is suitable for variable blade curved surface changes, and the pertinence and the precision of detection data are expanded.

Description

Technical Field

[0001] The present invention relates to the technical field of shaft component detection, and specifically to a strength detection device for the spiral shaft of a juice extractor. Background Art

[0002] The spiral shaft is one of the core components of a juice extractor. Its main function is to rotate and squeeze fruits or vegetables to separate the juice from the fibers therein. The spiral shaft usually adopts a spiral design, and generates pressure through slow rotation to squeeze the juice from the food materials. When the spiral shaft rotates, the food materials are pushed to the end of the pressing cavity. During the extrusion process, the spiral shaft needs to bear the frictional force, extrusion force of the food materials, and the pressure of possible hard objects (such as fruit cores, seeds, etc.), and keep rotating under the action of the above pressures and resistances. Therefore, the design and material hardness of the spiral shaft directly affect the pressing efficiency and durability.

[0003] In terms of structure, the core of the spiral shaft generally adopts a metal structure, and the outer part is processed with a shaft body made of PEEK or other high-hardness food-grade plastics. The blade spacing at the upper part of the shaft body is relatively wide, and the blades are relatively large, mainly used for quickly advancing the food materials, initially squeezing and separating the juice. The protrusions of the blades at the lower part are very small, and the spacing becomes narrower, mainly used for grinding the food materials through the shaft body. Therefore, there are significant differences in the shape and working mode between the spiral shaft and ordinary spiral blade shaft components. Moreover, the design and performance of the spiral shaft are directly related to the juicing ability and the ratio of residue and juice output, which are important indicators of the juice extractor. Therefore, relevant data feedback for the spiral shaft is highly needed.

[0004] In the existing detection means, for the detection of hardness and compressive strength, it mainly relies on various existing detection methods and equipment, such as Rockwell hardness testing, Vickers hardness testing, etc. However, under various detection means, it is impossible to test the spiral shaft according to the characteristics of this product and the requirements of its working state, but only to feedback the hardness and compressive capacity of its material itself. However, due to the complex and non-standard blade design of the spiral shaft, effective data feedback cannot be obtained, and it is impossible to form effective data support for the design and improvement of the spiral shaft and the product performance, which affects the further optimization of this type of technology. Summary of the Invention

[0005] The purpose of the present invention is to provide a strength detection device for the spiral shaft of a juice extractor, which can perform multi-angle strength detection on the blades of the spiral shaft, adapt to the changing blade surface changes, and expand the pertinence and accuracy of the detection data.

[0006] To achieve the above purpose, the present invention is realized through the following technical solutions:

[0007] An original juice extractor spiral shaft strength detection device, including a main body. An installation frame is fixedly installed on the main body. A turntable is rotatably installed on the installation frame and is driven to rotate by an output motor installed in the main body. A torque sensor is cooperated with the output motor. The turntable is used to coaxially fix the spiral shaft to be tested. Vertical stands extending upright are symmetrically arranged on both sides of the turntable. A third slide rail is installed on the stand. A third slider with a locking and limiting function is slidably engaged with the third slide rail up and down. A connecting seat is fixed on the third slider. A rotating seat is rotatably connected to the connecting seat. A connecting head is fixed on the rotating seat. An installation hole penetrates through the connecting head. A pressing rod is arranged between the two stands. The two ends of the pressing rod respectively penetrate through the installation holes on the same side. The peripheral surface of the pressing rod is used to contact the surface of the spiral shaft blade.

[0008] An electromagnetic pin is fixedly installed at the lower part of the third slider. The electromagnetic pin has a locking pin driven by electromagnetic force on the inner side close to the track.

[0009] Both ends of the pressing rod have a threaded structure and are respectively threadedly connected with butterfly nuts.

[0010] A lower top seat fixedly connected to the turntable is arranged at the center of the turntable. A lower limiting member is fixedly arranged at the center of the lower top seat. The lower limiting member is circumferentially and stop-fitted with the bottom end of the spiral shaft core. A machine head is arranged at the upper part of the main body. A clamping seat is fixedly installed on the machine head. A lifting slide seat is arranged at the coaxial position above the turntable corresponding to the clamping seat. A rotating sleeve that is vertically lifted and lowered in cooperation with the lifting slide seat penetrates through the lifting slide seat. An upper limiting member is rotatably connected to the inside of the rotating sleeve through a bearing member. The upper limiting member is circumferentially and stop-fitted with the top end of the spiral shaft core. A clamping hydraulic cylinder fixedly installed relative to the machine head is arranged above the rotating sleeve. A clamping cylinder rod that is telescopically fitted relative to the clamping hydraulic cylinder is arranged at the bottom end of the clamping hydraulic cylinder. The bottom end of the clamping cylinder rod is fixedly connected to the top end of the rotating sleeve.

[0011] An installation ring is arranged at the front end of the installation frame. The installation ring is rotatably connected to the turntable through a bearing seat above it. A passive gear fixedly connected to the turntable is arranged below the turntable. A transmission gear meshing with the passive gear is rotatably installed on the installation frame. The transmission gear is driven by the output motor.

[0012] A chassis is provided below the turntable. Lifting frames are provided at both ends of the chassis, symmetrically arranged side by side relative to the mounting frames. A first slide rail extending vertically is installed on the lifting frame, and a first slider is engaged with the first slide rail. The first slider is fixed to the main machine or the mounting frame. It further includes a resistance hydraulic cylinder fixed relative to the main machine. A control cylinder rod that is telescopically engaged with the resistance hydraulic cylinder is output from the resistance hydraulic cylinder. The end of the control cylinder rod is fixedly installed with the chassis. The resistance hydraulic cylinder has two working modes: a constant pressure mode and a limit mode. In the constant pressure mode, a constant acting force F is output on the control cylinder rod. In the limit mode, the control cylinder rod stops to achieve the limit function. A telescopic frame is fixed to the bottom of the chassis. The telescopic frame is centrally arranged below the turntable. The length direction of the telescopic frame corresponds to the radial direction of the turntable. An adjusting lead screw driven by an adjusting motor is rotatably installed in the center of the bottom surface of the telescopic frame. A nut is engaged with the adjusting lead screw. Second slide rails are symmetrically installed on both sides of the adjusting lead screw. Second sliders are slidably engaged with the second slide rails. An adjusting slide table with a linear adjustment stroke in the radial direction of the turntable is provided below the telescopic frame. Both the second slider and the nut are fixed to the adjusting slide table. The bottom ends of the vertical frames are respectively fixed to both ends of the adjusting slide table.

[0013] A pressure sensor is installed between the second slider and the adjusting slide table for obtaining the pressure feedback data obtained by the pressure rod.

[0014] During specific detection, the implemented spiral shaft strength detection method includes: a pressure resistance strength detection method and a load strength detection method;

[0015] The pressure resistance strength detection method is to fix the spiral shaft at the center of the turntable, keep the pressure rod in contact with the surface of the spiral shaft blade and stop it. When the turntable has a tendency to rotate until the blade is damaged, detection data is obtained. The detection data includes spiral shaft torque data and blade pressure data;

[0016] The load strength detection method is to fix the spiral shaft at the center of the turntable, keep the pressure rod in contact with the surface of the spiral shaft blade, and start the turntable to rotate while the control cylinder rod transmits a preset resistance through the pressure rod, driving the pressure rod to push up or down. Detection data is obtained during this process. The detection data includes spiral shaft torque data and blade pressure data.

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

[0018] After installing the spiral shaft, a parallel and upright support structure is formed on both sides of the spiral shaft through the vertical frame. The height and tilt angle of the pressure rod can be flexibly adjusted through the third slider. When the pressure rod is fixed to the sliders at both ends with a tangential positional relationship relative to the contact point as much as possible, the angle of the pressure rod can be determined. When the pressure rod presses on the blade, based on the adjusted tilt state, a pressure as perpendicular as possible to the contact point can be obtained, reducing the detection error caused by improper pressure direction. By disassembling and adjusting the pressure rod, the detection position can also be flexibly adjusted, so that the detection area is not limited to between the blades or the outer surface, overcoming the problem of spatial limitations caused by the irregularity of the blades.

[0019] In addition, this device not only obtains the pressure data of the blade based on the breaking pressure, but also can break through and synchronously record the pressure data and torque data, realizing the construction of the multi-dimensional data in terms of the correlation and intensity relationship, making the data simulation and guidance stronger, and providing a theoretical basis for the product quality and optimal design. Brief Description of the Drawings

[0020] Figure 1 is the overall schematic diagram of the present invention.

[0021] Figure 2 is the side schematic diagram of the present invention.

[0022] Figure 3 is the front schematic diagram of the present invention.

[0023] Figure 4 is the schematic diagram of the component disassembly of the present invention.

[0024] Figure 5 is the schematic diagram of some components on the mounting rack of the present invention (rear side view).

[0025] Figure 6 is the schematic diagram of some components on the mounting rack of the present invention (front side view).

[0026] Reference numerals shown in the drawings:

[0028] 1 Base plate; 2, Frame; 3, Main unit; 4, Machine head; 5, Display screen; 6, Mounting bracket; 7, Turntable; 8, Lower top seat; 9, Lower limit member; 10, Clamping seat; 11, Lifting slide seat; 12, Rotating sleeve; 13, Upper limit member; 14, Clamping hydraulic cylinder; 15, Clamping cylinder rod; 16, Driven gear; 17, Driving gear; 20, Lifting frame; 21, First slide rail; 22, First slider; 23, Underframe; 24, Control cylinder rod; 26, Telescopic frame; 27, Adjusting lead screw; 28, Second slide rail; 29, Second slider; 30, Adjusting slide table; 31, Upright frame; 32, Third slide rail; 33, Third slider; 34, Electromagnetic pin; 35, Connecting seat; 36, Rotating seat; 37, Connecting head; 38, Pressing rod; 39, Nut; 40, Support. Detailed implementation manners

[0029] The present invention will be further described below in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and not to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by this application.

[0030] For the instruments, reagents, materials, etc. involved in the following embodiments, unless otherwise specified, they are all conventional instruments, reagents, materials, etc. existing in the prior art and can be obtained through regular commercial channels. For the experimental methods, detection methods, etc. involved in the following embodiments, unless otherwise specified, they are all conventional experimental methods, detection methods, etc. existing in the prior art.

[0031] Since the appearance of slow juicers until now, the outer shapes of the spiral shafts of various brands and series vary greatly, and there are obvious differences in form. However, there is no data support for the performance of the spiral shafts of their respective models and shapes. The necessary tests carried out are only limited to material hardness, compressive capacity, wear resistance, etc. However, during the operation of the spiral shaft, based on its prior extrusion and then grinding of food ingredients, not only is there a large extrusion force between the spiral blades / vanes to crush the food ingredients by extrusion, but also continuous extrusion and crushing are carried out during the propulsion, and the crushing of food ingredients, including carrots, pomegranates, cucumbers, bitter gourds and other food ingredients with a certain hardness, is completed by relying on pressure. This extrusion is accompanied by an impact on the rotational torque, which is a complex process of dynamic change. Moreover, the more convex the blade protrudes and the thinner the thickness, the easier it is to break or be damaged under the same pressure, and the more obvious the feedback to the torque. Therefore, to judge the performance of the spiral shaft, the data reflected by the existing detection means are completely insufficient.

[0032] In addition, the extrusion area of the spiral shaft needs to be selected for detection, so the detection of the blade is essential. However, the thickness of the blade varies greatly with the distance from the axis core and is usually spirally inclined. This geometric shape makes it difficult for the hardness detection to have the compression direction perpendicular to the contact point. The curved surface and inclination angle of the blade may cause uneven contact between the hardness tester indenter and the surface, affecting the measurement accuracy and generating errors. Moreover, the hardness of the blade root, top, and transition areas may be different and need to be detected separately, but the inclined structure may limit the operating space of the detection equipment, bringing great difficulties to the detection.

[0033] Therefore, this device is mainly a targeted detection equipment for dealing with the working condition strength of the spiral shaft. Its main structure includes a base plate 1, which is used to stabilize and support this device. The base plate 1 is made of a rectangular cast iron plate and is of a rectangular structure. A frame 2 is provided near one end of the base plate 1. A main unit 3 is provided at the lower part of the frame 2, and a machine head 4 is provided at the upper part of the frame 2. A display screen 5 or an instrument panel is provided at the upper part of the machine head 4 for displaying the data and parameters of this equipment. The operation buttons can be set as touch-type or press-type.

[0034] A mounting bracket 6 extending forward (towards the end away from the frame 2) is provided in the middle of the main unit 3. An installation ring is provided at the front end of the mounting bracket 6. A turntable 7 rotatably connected thereto through a bearing seat is provided above the installation ring. A lower top seat 8 fixedly connected thereto is provided at the center of the turntable 7. A lower limit member 9 fixed thereto is provided at the center of the lower top seat 8. The lower limit member 9 cooperates with the lower end of the axis core at the bottom end of the spiral shaft to achieve circumferential stop of the spiral shaft. It cooperates with the bottom end of the axis core at the bottom end and limits the position of the lower end of the axis core through a top block. A clamping seat 10 fixedly installed relative thereto is provided on the machine head 4. A lifting slide seat 11 is provided at the coaxial position above the turntable 7 corresponding to the clamping seat 10. A rotating sleeve 12 that is vertically lifted and lowered in cooperation therewith penetrates through the lifting slide seat 11. An upper limit member 13 is rotatably connected inside the rotating sleeve 12 through a bearing member, and the upper limit member 13 cooperates with the upper end of the axis core for circumferential limit.

[0035] For example, in this example, the top end of the axis core has a hexagonal cross-section structure and the bottom end has an internal hexagonal groove. Therefore, a slot for the internal hexagon inserted into the top end of the axis core is provided on the bottom surface of the upper limit member 13, and the lower limit member 9 is a hexagonal plug corresponding to the internal hexagonal groove at the bottom end of the axis core.

[0036] Not limited to this example, if the two ends of the axis core adopt a key connection structure, the upper limit member 13 and the lower limit member 9 adopt corresponding key groove structures based on the structure of the axis core, so as to achieve the cooperation of the top end and the bottom end of the axis core.

[0037] Above the rotating sleeve 12, a clamping hydraulic cylinder 14 fixedly installed relative to the machine head 4 is provided. At the bottom end of the clamping hydraulic cylinder 14, a clamping cylinder rod 15 is telescopically fitted relative thereto. The bottom end of the clamping cylinder rod 15 is fixedly connected to the top end of the rotating sleeve 12 through a flange and bolts, realizing the up-and-down lifting drive and control of the rotating sleeve 12, enabling the height of the upper limit member 13 to be adjustable, freely adjusting the distance relative to the lower limit member 9, thus facilitating the loading and unloading of the spiral shaft into and from the clamp, and not affecting the rotation of the spiral shaft after clamping, being able to reliably clamp the spiral shaft while maintaining the rotation effect of the spiral shaft, and facilitating subsequent detection.

[0038] Due to the liftable clamping structure for the shaft core, this device can detect various styles of spiral shafts.

[0039] Below the turntable 7, a driven gear 16 fixedly connected thereto is provided. A transmission gear 17 meshing with the driven gear 16 is rotatably installed on the mounting frame 6. The transmission gear 17 is driven based on an output motor. A torque sensor is provided on the output shaft of the output motor. The output motor is installed inside the housing of the main machine 3. The output shaft of the output motor is directly connected to the transmission gear 17, or the output shaft of the output motor is in transmission connection with the transmission gear 17 through gear transmission, realizing the drive of the transmission gear 17. Through gear transmission, it can ensure that the torque of the output motor is fully transmitted to the lower turntable 7 to drive the spiral shaft to be tested to rotate, simulating the working conditions. The driving rotation speed is set at a low speed, not exceeding 85 revolutions per minute, preferably corresponding to the designed rotation speed of the spiral shaft to be tested under working conditions. For example, for a juice extractor with a designed rotation speed of 65 rpm, a rotation speed of 65 rpm is set.

[0040] On both sides of the mounting frame 6, lifting frames 20 are symmetrically and juxtaposedly provided. On the lifting frames 20, first slide rails 21 extending vertically are installed. First sliders 22 are fitted on the first slide rails 21. The first sliders 22 are fixed to the main machine 3 or the mounting frame 6, so that the lifting frames 20 have an up-and-down lifting stroke. At the bottom end of the lifting frames 20, a bottom frame 23 is provided. The bottom ends of the lifting frames 20 are fixedly installed on the bottom frame 23. A resistance hydraulic cylinder is also installed on the mounting frame 6. The resistance hydraulic cylinder is arranged inside the main machine 3. At the bottom end of the resistance hydraulic cylinder, a control cylinder rod 24 is telescopically fitted relative thereto. The end of the control cylinder rod 24 is fixed to the bottom frame 23. The resistance hydraulic cylinder has two working modes: a constant pressure mode and a limit mode. In the constant pressure mode, a constant pulling force or pushing force is output on the control cylinder rod 24 based on manual or preset values, thereby giving a constant resistance to the target object. If the target object moves, it needs to overcome this pushing force or pulling force, thus realizing the resistance effect. In the limit mode, the hydraulic cylinder fixes the target object at a specified position by controlling the extended length of the control cylinder rod 24, realizing the limit function, and can accurately position or prevent the target object from moving.

[0041] Without being limited to this example, the resistance hydraulic cylinder can be directly installed on the base plate 1 and as close as possible to the position of the turntable 7, so that the acting force corresponds to the screw shaft as much as possible.

[0042] A telescopic frame 26 is fixed to the bottom of the chassis 23. The telescopic frame 26 is centrally arranged below the turntable 7. The length direction of the telescopic frame 26 corresponds to the radial direction of the turntable 7. A regulating lead screw 27 is rotatably installed in the center of the bottom surface of the telescopic frame 26. An adjusting motor for driving the regulating lead screw 27 is installed at one end of the telescopic frame 26. A nut is fitted on the regulating lead screw 27. Second slide rails 28 are symmetrically installed on both sides of the regulating lead screw 27. Second sliders 29 are slidably fitted on the second slide rails 28. A regulating slide table 30 with a linear adjustment stroke in the radial direction relative to the turntable 7 is arranged below the telescopic frame 26. Both the second slider 29 and the nut are fixed on the regulating slide table 30. A pressure sensor is installed between the second slider 29 and the regulating slide table 30 for obtaining the pressure feedback data obtained by the pressure rod 38.

[0043] Vertical brackets 31 extending vertically are respectively fixed at both ends of the regulating slide table 30. The brackets 31 are arranged on both sides of the turntable 7. The distance between the brackets 31 can accommodate the turntable 7 assembly, the screw shaft, and the machine head 4, so that the up and down movement of the brackets 31 does not interfere with other components in the middle. The brackets 31 and the regulating slide table 30 form a U-shaped support structure. A third slide rail 32 arranged vertically is fixed to the upper part of the brackets 31. A third slider 33 that slides up and down is fitted on the third slide rail 32. An electromagnetic pin 34 is fixed to the lower part of the third slider 33. The electromagnetic pin 34 has a locking pin based on electromagnetic drive on the inner side close to the rail. The locking pin realizes the limit locking of the third slider 33 by abutting against the third slide rail 32. A connecting seat 35 is fixed on the third slider 33. The connecting seat 35 is fixed on the third slider 33 by bolt members. A rotating seat 36 is rotatably connected to the connecting seat 35. A connecting head 37 is fixed on the rotating seat 36. An installation hole penetrates through the connecting head 37. A pressure rod 38 is also included. In this example, the pressure rod 38 can be a steel rod with a circular cross-section, having high hardness and strong anti-deformation ability. After the two ends of the pressure rod 38 respectively penetrate through the installation holes on the same side, the effect of spanning the pressure rod 38 between the two brackets 31 is achieved. Blocks or detachable stoppers can be arranged at both ends of the pressure rod 38. In this example, threaded structures are adopted at both ends, and butterfly nuts 39 are connected by threads, which is convenient for manual operation and limits the two ends of the pressure rod 38, so that the pressure rod 38 is kept between the two rotating seats 36 and spans between the two brackets 31.

[0044] A support 40 is arranged at the bottom end of the third slide rail 32 for physically limiting the third slider 33.

[0045] Based on that both ends of the sliding rod are swingably connected to the sliders on the same side, and the heights of the sliders on both sides are adjustable based on the third slide rail 32, the pressure rod 38 can contact the blade surface of the spiral shaft to be measured at any angle.

[0046] Based on the above structure, the following principle explanations are given for the detection of the spiral shaft by this device:

[0047] Clamping and installation of the spiral shaft: Through the upper limit member 13 and the lower limit member 9, the two ends of the spiral shaft core are clamped up and down and circumferentially limited. After clamping, the rotation adaptation of the spiral shaft can be realized based on the rotating sleeve 12, and the driving control of the rotation or stillness of the spiral shaft can be realized through the turntable 7, so that the spiral shaft can have three cooperation detection modes after being clamped: keeping still, adjusting the circumferential angle, and simulating the rotation under working conditions.

[0048] After installing the spiral shaft, a parallel and upright support structure is formed on both sides of the spiral shaft through the vertical frame 31. Through the second slide rail 28, the two vertical frames 31 can be adjusted in position radially relative to the spiral shaft, so that the distance between the pressure rod 38 and the shaft core is adjustable, that is, the position where the pressure rod 38 presses on the blade (spiral blade) can be flexibly adjusted, so that the pressing position can be close to the blade edge or close to the shaft body, and thus the hardness of different positions at the root, top and transition regions of the blade can be measured, thereby improving the detection data.

[0049] The contact between the pressure rod 38 and the blade surface can flexibly adjust the inclination angle. After adjustment, when the pressure rod 38 is fixed at a tangential position relationship relative to the contact point as much as possible, the angle of the pressure rod 38 can be determined. When the pressure rod 38 presses on the blade for testing, based on the adjusted inclined state, a pressure as perpendicular as possible to the contact point can be obtained, reducing the detection error caused by improper pressure direction.

[0050] Therefore, by adjusting the inclination angle of the pressure rod 38, a more reasonable pressure can be applied to the blade, and the relative position of the pressure of the pressure rod 38 can also be adjusted, including the height (by manually locking the third slider 33), the eccentricity (the position from the shaft core). Cooperating with the rotation of the spiral shaft to adjust the relative circumferential position of the blade on the outside, so as to realize the detection of different positions on the blade without detection blind spots. The pressure rod 38 can be located on the upper side or the lower side of the blade, overcoming the problem of spatial limitation caused by the irregularity of the blade.

[0051] When this device is detecting, the specific detection methods implemented include the following two modes:

[0052] 1 Pressure resistance strength detection mode:

[0053] 1.1 The area to be measured is located on the upper surface of the blade:

[0054] S1 Insert the bottom end of the spiral shaft to be measured into the lower limit piece, and lower the upper limit piece to insert it into the top end of the spiral shaft core to be measured, completing the clamping of the spiral shaft to be measured;

[0055] S2 Based on the rotation of the turntable, adjust the circumferential state of the spiral shaft so that the blade area to be measured is located at the central position on the outside;

[0056] S3 Keep the resistance hydraulic cylinder in the limit mode so that the height position of the holding pressure rod remains unchanged;

[0057] S4 Place the pressure rod above the surface of the area to be measured, lift the third sliders on both sides respectively, fit both ends of the pressure rod on the third sliders on both sides respectively, and then adjust the angle of the pressure rod so that the inclination angle of the pressure rod is tangent to the contact point of the blade as much as possible. Start the electromagnetic pin to lock the third sliders on both sides and keep the pressure rod in this state;

[0058] S5 Start the output motor to make the turntable have a rotation tendency. The rotation tendency is opposite to the rotation direction of the working condition, so there is a thrust to push the pressure rod upward, making there be a pressure between the pressure rod and the contact point;

[0059] S6 Based on the torque sensor, obtain the increasing change of the torque. Take the moment when the blade is damaged as the cut-off point, record the maximum torque value when the blade is damaged; and obtain the pressure data at the time of damage through the pressure sensor.

[0060] 1.2 The area to be measured is located on the lower surface of the blade:

[0061] It is generally the same as the steps for the upper surface, the difference is:

[0062] In step s4, place the pressure rod on the area to be measured on the lower surface of the blade, install both ends of the pressure rod on the third sliders on the same side, adjust the angle of the pressure rod so that the contact point between the pressing plate and the bottom surface of the blade is tangent and inclined as much as possible, start the electromagnetic pin to lock the third sliders on both sides, and keep the pressure rod in this state;

[0063] In step s6, start the output motor to make the turntable have a rotation tendency, and the rotation tendency is the same as the working condition direction, which is to have a thrust to push the pressure rod downward.

[0064] 2 Load intensity detection mode:

[0065] 2.1 The area to be measured is located on the upper surface of the blade:

[0066] S1 Insert the bottom end of the spiral shaft to be measured into the lower limit piece, and lower the upper limit piece to insert it into the top end of the spiral shaft core to be measured, completing the clamping of the spiral shaft to be measured;

[0067] S3 Make the lifting frame located at the bottom end of its stroke;

[0068] S4 Place the pressure bar on the upper surface of the blade located in the middle of the screw shaft. Lift the third sliders on both sides and cooperate with both ends of the pressure bar. Adjust the angle of the pressure bar so that its inclination angle is tangent to the contact point of the blade as much as possible. Activate the electromagnetic pins to lock the third sliders on both sides and keep the pressure bar in this state;

[0069] S5 Activate the resistance hydraulic cylinder in the constant pressure mode to make the control cylinder rod output a fixed pulling force F (this pulling force F is transmitted through the pressure bar to form a resistance F that hinders the rotation of the screw shaft). Activate the turntable to rotate, so that the screw shaft rotates under the load pulling force F, driving the pressure bar to push upward. Since the third sliders are locked relative to the vertical frame, when the pressure bar is pushed upward by the screw shaft, it drives the entire vertical frame to move upward as a whole under the guidance of the first slide rail. During this period, a constant resistance F is output through the control cylinder rod to form a load on the rotation of the screw shaft, and the torque influence on the rotation is obtained through the torque sensor;

[0070] 2.2 The area to be measured is located on the lower surface of the blade:

[0071] S1 Clamp the bottom end of the screw shaft to be measured into the lower limit piece, and lower the upper limit piece to clamp the top end of the core of the screw shaft to be measured to complete the clamping of the screw shaft to be measured;

[0072] S3 Make the lifting frame located at the top of its stroke;

[0073] S4 Place the pressure bar on the lower surface of the blade located in the middle of the screw shaft. Lift the third sliders on both sides and cooperate with both ends of the pressure bar. Adjust the angle of the pressure bar so that its inclination angle is tangent to the contact point of the blade as much as possible. Activate the electromagnetic pins to lock the third sliders on both sides and keep the pressure bar in this state;

[0074] S5 Activate the resistance hydraulic cylinder in the constant pressure mode to make the control cylinder rod output a fixed pulling force F. This pulling force F is transmitted through the pressure bar to form a resistance F that hinders the rotation of the screw shaft. Activate the turntable to rotate, so that the screw shaft rotates under the load resistance F, and record the torque data, resistance F data, and pressure data.

[0075] Through the pressure resistance strength detection, the pressure and torque at the time of blade failure can be obtained. Not only the ultimate pressure data that the blade can bear at different positions can be obtained, but also the torque data in this case can be obtained synchronously. Combining multi-dimensional data makes the data model more complete. Based on the flexible adjustment of the pressing position of this device, the detection position is not limited to conditions such as the root, edge, top surface, bottom surface, and height of the blade, and the construction of the data is more complete.

[0076] Through the load strength detection, the working condition simulation of the screw shaft rotating with resistance can be realized. By setting different resistances, the influence on the core of the rotating shaft and the pressure influence on the blade can be obtained. By increasing the resistance data, the bearing condition of the blade during rotation with resistance can be observed, and the working state can be restored, making the data more guiding and credible.

[0077] Therefore, through this device, targeted multi-dimensional strength detection of the spiral shaft of the juice extractor can be carried out, which can not only break through the limitations of the detection position, but also take into account the curved surface changes on the blade surface, improve the detection accuracy, and construct more multi-dimensional, three-dimensional, complete and simulated data information to feedback and guide the design of the spiral shaft.

Claims

1. A juicer screw shaft strength detection device, characterized in that: The invention comprises a main machine (3), wherein a mounting frame (6) fixedly mounted relative to the main machine (3) is provided on the main machine (3), a turntable (7) is rotatably mounted on the mounting frame (6), the turntable (7) is driven to rotate based on an output motor installed in the main machine (3), the output motor is equipped with a torque sensor, the turntable (7) is used to coaxially fix a screw shaft to be measured, upright and extending frames (31) are symmetrically arranged on both sides of the turntable (7), a third slide rail (32) is mounted on the frame (31), and the third slide rail (32) A third slider (33) with a locking and limiting function is slidably matched up and down, and a connecting seat (35) is fixed on the third slider (33), and a rotating seat (36) is provided on the connecting seat (35) for rotationally connecting with it, and a connecting head (37) is fixed on the rotating seat (36), and a mounting hole is penetrated on the connecting head (37). A pressure rod (38) is provided between the two vertical frames (31), and the two ends of the pressure rod (38) respectively penetrate the mounting holes on the same side, and the circumferential surface of the pressure rod (38) is used to contact the surface of the spiral shaft blade.

2. A juicer screw shaft strength detection device according to claim 1, characterized in that: An electromagnetic pin (34) is fixedly mounted on the lower part of the third sliding block (33), and the electromagnetic pin (34) has a locking pin based on electromagnetic drive on the inner side close to the track.

3. The device for detecting the strength of the spiral shaft of a juicer according to claim 1, characterized in that: Both ends of the pressure rod (38) have threaded structures and are respectively threadedly connected with butterfly-shaped nuts (39).

4. The device for detecting the strength of the spiral shaft of a juicer according to claim 1, characterized in that: A lower top seat (8) fixedly connected to the turntable (7) is provided in the center thereof, a lower limit member (9) fixed to the turntable (7) is provided in the center thereof, the lower limit member (9) being engaged with the bottom end of the spiral shaft core in a circumferential stop manner, a machine head (4) is provided on the upper part of the main machine (3), a clamping seat (10) fixedly mounted relative to the machine head (4), a lifting slide seat (11) is provided on the clamping seat (10) at a coaxial position corresponding to the top of the turntable (7), and a shaft extending in the lifting slide seat (11) is provided in the lifting slide seat (11) and a shaft extending in the lifting slide seat (11) is provided with a shaft extending in the lifting slide seat (11) and a shaft extending in the lifting slide seat (11) and a shaft extending in the lifting slide seat (11) and a shaft extending in the lifting slide seat (11) are provided with a shaft extending in the lifting slide seat (11) and ... The rotating sleeve (12) is equipped with a lifting and lowering mechanism, and the interior of the rotating sleeve (12) is rotatably connected to an upper limit position member (13) through a bearing member, and the upper limit position member (13) is circumferentially stoppered with the top end of the spiral shaft core. A clamping hydraulic cylinder (14) is provided above the rotating sleeve (12) and is fixedly installed relative to the machine head (4). The bottom end of the clamping hydraulic cylinder (14) is provided with a clamping cylinder rod (15) that is telescopically matched with the clamping cylinder rod, and the bottom end of the clamping cylinder rod (15) is fixedly connected to the top end of the rotating sleeve (12).

5. The device for detecting the strength of the spiral shaft of a juicer according to claim 1, characterized in that: A mounting ring is provided at the front end of the mounting frame (6); a gear (16) is provided above the mounting ring and is rotatably connected to the turntable (7) via a bearing seat; a driven gear (16) is provided below the turntable (7) and is fixedly connected to the turntable; a transmission gear (17) is rotatably mounted on the mounting frame (6) and is meshed with the driven gear (16); the transmission gear (17) is driven based on an output motor.

6. The device for detecting the strength of the spiral shaft of a juicer according to claim 1, characterized in that: A base frame (23) is provided below the turntable (7), and lifting frames (20) are provided at both ends of the base frame (23) and are symmetrically arranged in parallel with the mounting frame (6). A vertically extending first slide rail (21) is installed on the lifting frame (20), and the first slide rail (21) is matched with a first slider (22). The first slider (22) is fixed on the main machine (3) or the mounting frame (6). The lifting frame (20) also includes a resistance hydraulic cylinder fixed relative to the main machine (3), and the resistance hydraulic cylinder outputs a control cylinder rod (24) that is telescopically matched with the resistance hydraulic cylinder. The end of the control cylinder rod (24) is fixedly installed on the base frame (23), and the resistance hydraulic cylinder has two working modes: a constant pressure mode and a limit mode. In the constant pressure mode, a constant force F is output on the control cylinder rod (24), and in the limit mode, the control cylinder rod (24) is stopped to realize the limit function. A telescopic frame (26) is fixed at the bottom of the base frame (23), and the telescopic frame (26) is centrally arranged below the turntable (7). The length direction of the telescopic frame (26) corresponds to the radial direction of the turntable (7). An adjusting screw (27) driven by an adjusting motor is rotatably installed in the center of the bottom surface of the telescopic frame (26). A nut is matched with the adjusting screw (27). Second slide rails (28) are symmetrically installed on both sides of the adjusting screw (27). A second slider (29) is slidably matched with the second slide rail (28). An adjusting slide table (30) having a radially linear adjustment stroke relative to the turntable (7) is provided below the telescopic frame (26). The second slider (29) and the nut are both fixed on the adjusting slide table (30), and the bottom ends of the vertical frame (31) are respectively fixed to the two ends of the adjusting slide table (30).

7. A juicer screw shaft strength detection device according to claim 6, characterized in that: A pressure sensor is installed between the second sliding block (29) and the adjusting slide table (30) for obtaining pressure feedback data obtained by the pressure rod (38).

8. The device for detecting the strength of the spiral shaft of a juicer according to claim 6, characterized in that: During the specific inspection, the spiral shaft strength inspection methods implemented include: compressive strength inspection method and load strength inspection method; The compression strength testing method is to fix the screw shaft at the center of the rotating disk (7), keep the pressure rod (38) in contact with the surface of the screw shaft blade and stop it, start the rotating disk (7) to have a rotation tendency, until the blade is damaged, and obtain the test data, the test data including the screw shaft torque data and the blade pressure data; The load strength detection method is to fix the screw shaft at the center of the turntable (7), keep the pressure rod (38) in contact with the surface of the screw shaft blade, control the cylinder rod (24) to transmit a preset resistance through the pressure rod (38), start the turntable (7) to rotate, drive the pressure rod (38) to push up or press down, and obtain detection data in this process, the detection data includes the screw shaft torque data and the blade pressure data.

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