A juicer spiral shaft strength detection device

Abstract

The application discloses a kind of original juice machine spiral shaft strength detection device, mainly related to shaft detection technical field.It mainly includes host computer and mounting bracket, rotatable mounting disc is installed on mounting bracket, disc is rotated based on output motor driven installation in host computer, torsion sensor is matched on the output motor, the coaxial fixed spiral shaft for measurement is used on the disc, the two sides of disc are symmetrically provided with vertical extension stand, third sliding rail and third sliding block are installed on the stand, third sliding block is fixed with connecting seat, rotating seat is rotatably connected on connecting seat, connecting head with connecting hole is fixed on rotating seat, between two stands, pressure rod is equipped, the both ends of pressure rod respectively penetrate the mounting hole of same side, the peripheral surface of pressure rod is used to contact with spiral shaft blade surface.The beneficial effects of the application are that the blade of the spiral shaft can be detected at multiple angles, the blade surface changes are adaptable, and the detection data specificity and accuracy are expanded.

Description

Technical Field

[0001] This invention relates to the field of shaft testing technology, specifically a strength testing device for a juicer screw shaft. Background Technology

[0002] The auger is one of the core components of a juicer. Its main function is to separate the juice from the fiber in fruits or vegetables by rotating and squeezing them. The auger typically has a spiral design, generating pressure through slow rotation to extract juice from the ingredients. As the auger rotates, the ingredients are pushed towards the end of the pressing chamber. During the squeezing process, the auger needs to withstand the friction, pressure, and pressure from any hard objects (such as pits or seeds) and maintain its rotation under these pressures and resistances. Therefore, the design and material hardness of the auger directly affect the squeezing efficiency and durability.

[0003] Structurally, the auger shaft core is generally made of metal, with the outer casing made of PEEK or other high-hardness food-grade plastic. The upper blades of the shaft have a wider spacing and are larger, primarily used for rapidly propelling the ingredients, initially squeezing and separating the juice. The lower blades have very small protrusions and a narrower spacing, mainly used for grinding the ingredients through the shaft. Therefore, the auger shaft differs significantly from ordinary auger blade shafts in morphology and working mode. Furthermore, the design and performance of the auger shaft directly affect the juicing capacity and the ratio of pulp to juice, making it a crucial indicator for slow juicers. Therefore, feedback on relevant data regarding the auger shaft is essential.

[0004] In existing testing methods, the testing of hardness and compressive strength mainly relies on various existing testing methods and equipment, such as Rockwell hardness testing and Vickers hardness testing. However, none of these testing methods can test the characteristics of the screw shaft as a product and the requirements of its working condition. They can only provide feedback on the hardness and compressive strength of the material itself. However, due to the complex and non-standard blade design of the screw shaft, effective data feedback cannot be obtained, and effective data support cannot be provided for the design and improvement of the screw shaft and the product performance, thus affecting the further optimization of this type of technology. Summary of the Invention

[0005] The purpose of this invention is to provide a juicer auger shaft strength testing device that can perform multi-angle strength testing on the blades of the auger shaft, adapt to the changing blade surface curvature, and expand the relevance and accuracy of the testing data.

[0006] To achieve the above objectives, the present invention employs the following technical solution:

[0007] A juicer auger shaft strength testing device includes a main unit, on which a mounting frame is fixedly mounted. A turntable is rotatably mounted on the mounting frame. The turntable is driven to rotate by an output motor installed inside the main unit. A torque sensor is coupled to the output motor. The auger shaft to be tested is coaxially fixed on the turntable. Vertically extending supports are symmetrically arranged on both sides of the turntable. A third slide rail is mounted on the support. A third slider with a locking and limiting function is slidably engaged with the third slide rail. 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. A mounting hole is passed through the connecting head. A pressure rod is provided between the two supports. The two ends of the pressure rod pass through the mounting hole on the same side. The circumferential surface of the pressure rod is used to contact the surface of the auger shaft blades.

[0008] An electromagnetic pin is fixedly installed at the lower part of the third slider, and the electromagnetic pin has an electromagnetically driven locking pin on the inner side near the track.

[0009] The pressure rod has threaded structures at both ends, and each end is threaded with a wing-shaped nut.

[0010] The turntable has a lower top seat fixedly connected to it at its center. The lower top seat has a lower limit member fixedly connected to it at its center. The lower limit member is circumferentially stopped with the bottom end of the spiral shaft core. The upper part of the main unit has a machine head. The machine head has a clamping seat fixedly installed relative to it. The clamping seat has a lifting slide at a coaxial position above the turntable. A rotating sleeve that moves up and down with it passes through the lifting slide. An upper limit member is rotatably connected inside the rotating sleeve through a bearing. The upper limit member is circumferentially stopped with the top end of the spiral shaft core. A clamping hydraulic cylinder fixedly installed relative to the machine head is located above the rotating sleeve. The bottom end of the clamping hydraulic cylinder has a clamping cylinder rod that moves telescopically with it. The bottom end of the clamping cylinder rod is fixedly connected to the top end of the rotating sleeve.

[0011] The mounting frame has a mounting ring at its front end, and a rotating connection between the mounting ring and the turntable via a bearing seat is provided above the mounting ring. A driven gear is fixedly connected to the turntable below it. A transmission gear that meshes with the driven gear is rotatably mounted on the mounting frame. The transmission gear is driven by an output motor.

[0012] A base frame is located below the turntable. At both ends of the base frame are symmetrically arranged lifting frames opposite to the mounting brackets. A vertically extending first slide rail is mounted on each lifting frame, and a first slider is fitted onto the first slide rail. The first slider is fixed to the main unit or the mounting bracket. The system also includes a resistance hydraulic cylinder fixed relative to the main unit. The resistance hydraulic cylinder outputs a control cylinder rod that extends and retracts with it. The end of the control cylinder rod is fixedly mounted to the base frame. The resistance hydraulic cylinder has two operating modes: constant pressure mode and limit mode. In constant pressure mode, the control cylinder rod outputs a constant force F. In limit mode, the control cylinder rod stops. To achieve the limiting function, a telescopic frame is fixed to the bottom of the base frame. The telescopic frame is centrally located below the turntable, and its length direction corresponds to the radial direction of the turntable. An adjusting screw driven by an adjusting motor is rotatably mounted centrally on the bottom surface of the telescopic frame. A nut is fitted on the adjusting screw. Second slide rails are symmetrically installed on both sides of the adjusting screw, and second sliders are slidably fitted on the second slide rails. An adjusting slide table with a linear adjustment stroke relative to the radial direction of the turntable is provided below the telescopic frame. The second slider and the nut are both fixed on the adjusting slide table. The bottom ends of the upright frame are respectively fixed to the two ends of the adjusting slide table.

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

[0014] In specific testing, the methods used to test the strength of the helical shaft include: compressive strength testing and load strength testing.

[0015] The pressure resistance test method involves fixing the spiral shaft in the center of the turntable, keeping the pressure rod in contact with the surface of the spiral shaft blades and stopping it, starting the turntable to rotate until the blades are damaged, and obtaining test data. The test data includes spiral shaft torque data and blade pressure data.

[0016] The load strength detection method involves fixing the helical shaft in the center of the turntable, keeping the pressure rod in contact with the surface of the helical shaft blades, and controlling the cylinder rod to transmit a preset resistance through the pressure rod to start the turntable to rotate, thereby driving the pressure rod to push up or press down. During this process, detection data is obtained, including helical 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 the screw shaft is installed, a parallel, upright support structure is formed on both sides of the screw shaft using a stand. The height and tilt angle of the pressure rod can be flexibly adjusted via a third slider, ensuring the pressure rod is tangentially positioned relative to the contact point. By fixing the sliders at both ends, the angle of the pressure rod can be determined. When the pressure rod presses against the blade, the adjusted tilt ensures that the contact point receives as vertical pressure as possible, reducing detection errors caused by improper pressure direction. The pressure rod can also be disassembled and adjusted to flexibly adjust the detection position, allowing the detection area to extend beyond the blades or outer surfaces, overcoming the spatial limitations caused by irregular blade shapes.

[0019] Furthermore, this device not only obtains pressure data on the blades based on destructive pressure, but also breaks through by simultaneously recording pressure data and torque data, realizing the construction of correlation and intensity relationships among multi-dimensional data, making the data simulation and guidance more effective, and providing a theoretical basis for product quality and optimized design. Attached Figure Description

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

[0021] Figure 2 This is a side view of the present invention.

[0022] Figure 3 This is a front view of the present invention.

[0023] Figure 4 This is a schematic diagram showing the components of the present invention disassembled.

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

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

[0026] The labels shown in the attached diagram:

[0027] 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 component; 10. Clamping seat; 11. Lifting slide; 12. Rotating sleeve; 13. Upper limit component; 14. Clamping hydraulic cylinder; 15. Clamping cylinder rod; 16. Driven gear; 17. Transmission gear; 20. Lifting frame; 21. First slide rail; 22. First slider; 23. Base frame; 24. Control cylinder rod; 26. Telescopic frame; 27. Adjusting screw; 28. Second slide rail; 29. ​​Second slider; 30. Adjusting slide table; 31. Stand; 32. Third slide rail; 33. Third slider; 34. Electromagnetic pin; 35. Connecting seat; 36. Rotating seat; 37. Connector; 38. Pressure rod; 39. Nut; 40. Support. Detailed Implementation

[0028] The present invention will be further illustrated below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the invention, and these equivalent forms also fall within the scope defined in this application.

[0029] Unless otherwise specified, the instruments, reagents, and materials used in the following embodiments are all conventional instruments, reagents, and materials already available in the prior art and can be obtained through legitimate commercial channels. Unless otherwise specified, the experimental methods and detection methods used in the following embodiments are all conventional experimental methods and detection methods already available in the prior art.

[0030] Since the advent of slow juicers, the appearance of the auger shafts from various brands and series has varied greatly, with obvious differences in shape. However, there is no data to support the performance of each model and shape of auger shaft. The necessary tests are limited to material hardness, compressive strength, and wear resistance. However, during operation, the auger shaft, based on its initial compression and subsequent grinding of food, not only experiences significant compressive force between the screw blades to break down the food, but also continues to compress and crush during propulsion, relying on pressure to pulverize food, including carrots, pomegranates, cucumbers, bitter melons, and other foods with a certain degree of hardness. This compression, along with its influence on rotational torque, is a complex and dynamically changing process. The more protruding and thinner the blades, the more easily they break or are damaged under the same pressure, and the more pronounced the torque feedback. Therefore, judging the performance of the auger shaft based on existing testing methods is completely insufficient.

[0031] Furthermore, the testing requires selecting the compression area of ​​the helical shaft, making blade testing essential. However, the blade thickness varies significantly depending on its distance from the shaft core, and they are typically distributed in a spiral, inclined pattern. This geometry makes it difficult for the hardness tester to achieve perpendicular contact with the compression point. The curvature and tilt angle of the blades can lead to uneven contact between the hardness tester indenter and the surface, affecting measurement accuracy and introducing errors. Additionally, the hardness of the blade root, tip, and transition area may differ, requiring separate testing. However, the inclined structure can limit the operating space of the testing equipment, significantly complicating the testing process.

[0032] Therefore, this device is mainly used for targeted testing of the working strength of the spiral shaft. Its main structure includes a base plate 1, which is used to stabilize and support the device. The base plate 1 is made of rectangular cast iron plate and has a rectangular structure. A frame 2 is located near one end of the base plate 1. The main unit 3 is located at the lower part of the frame 2, and a machine head 4 is located at the upper part of the frame 2. A display screen 5 or instrument panel is located on the upper part of the machine head 4 for displaying the data and parameters of the device. The operation buttons can be set to touch-sensitive or press-sensitive.

[0033] The main unit 3 has a mounting bracket 6 extending forward (away from the end of the frame 2) in the middle. The front end of the mounting bracket 6 has a mounting ring. Above the mounting ring is a turntable 7 rotatably connected to it via a bearing seat. The center of the turntable 7 has a lower top seat 8 fixedly connected to it. The center of the lower top seat 8 has a lower limit member 9 fixed to it. The lower limit member 9 cooperates with the lower end of the shaft core at the bottom of the spiral shaft to achieve circumferential stop of the spiral shaft. It cooperates with the bottom end of the shaft core at the bottom end and limits the position of the lower end of the shaft core through a top block. The machine head 4 has a clamping seat 10 fixedly installed thereto. The clamping seat 10 has a lifting slide 11 at a coaxial position above the turntable 7. The lifting slide 11 has a rotating sleeve 12 that cooperates with it to move up and down. The interior of the rotating sleeve 12 is rotatably connected to an upper limit member 13 via a bearing. The upper limit member 13 cooperates with the upper end of the shaft core to limit circumferential movement.

[0034] For example, in this example, the top of the shaft core has a hexagonal cross-section structure and the bottom has an internal hexagonal groove. Therefore, the bottom surface of the upper limit member 13 is provided with an internal hexagonal slot corresponding to the top of the shaft core bracket, and the lower limit member 9 is a hexagonal insert corresponding to the internal hexagonal groove at the bottom of the shaft core.

[0035] Not limited to this example, if the two ends of the shaft core adopt a key connection structure, then the upper limit member 13 and the lower limit member 9 adopt the corresponding keyway structure based on the structure of the shaft core, so as to achieve the fit between the top and bottom ends of the shaft core.

[0036] A clamping hydraulic cylinder 14 is fixedly installed above the rotating sleeve 12 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 coordinated with it. The bottom end of the clamping cylinder rod 15 is fixedly connected to the top end of the rotating sleeve 12 by a flange and bolts, realizing the driving and control of the up and down lifting of the rotating sleeve 12. This makes the height of the upper limit member 13 adjustable and the distance relative to the lower limit member 9 can be freely adjusted, which facilitates the insertion and clamping or removal of the spiral shaft. Moreover, the clamping does not affect the rotation of the spiral shaft. It can reliably clamp the spiral shaft while maintaining the rotation of the spiral shaft, which is convenient for subsequent testing.

[0037] Based on the adjustable clamping structure for the shaft core, this device is able to detect various types of spiral shafts.

[0038] A passive gear 16 is fixedly connected to the turntable 7 below it. A transmission gear 17, which meshes with the passive gear 16, is rotatably mounted on the mounting bracket 6. The transmission gear 17 is driven by an output motor. A torque sensor is mounted on the output shaft of the output motor. The output motor is installed inside the housing of the main unit 3. The output shaft of the output motor is directly connected to the transmission gear 17, or the output shaft of the output motor drives the transmission gear 17 through gear transmission. Through gear transmission, it can be ensured that the torque of the output motor is fully transmitted to the turntable 7 below, driving the spiral shaft under test to rotate. Simulated working conditions are used. The rotation speed is set at a low speed, not exceeding 85 revolutions per minute, preferably corresponding to the design speed of the spiral shaft under working conditions. For example, for a juicer with 65 rpm, a speed setting of 65 rpm is used.

[0039] The mounting frame 6 is also symmetrically and parallelly provided with lifting frames 20 on both sides. The lifting frames 20 are equipped with vertically extending first slide rails 21, and first sliders 22 are fitted on the first slide rails 21. The first sliders 22 are fixed on the main unit 3 or the mounting frame 6, so that the lifting frames 20 have a vertical lifting stroke. The bottom end of the lifting frames 20 is provided with a base frame 23, and the bottom end of the lifting frames 20 is fixedly installed on the base frame 23. The mounting frame 6 is also equipped with a resistance hydraulic cylinder, which is located inside the main unit 3. The bottom end of the resistance hydraulic cylinder is provided with a control cylinder rod 24 that is telescopically coordinated with it. The end of the control cylinder rod 24 is fixed on the base frame 23. The resistance hydraulic cylinder has two working modes: constant pressure mode and limit mode. In constant pressure mode, a constant pulling force or pushing force is output on the control cylinder rod 24 based on manual or preset values, so as to give the target object a constant resistance. If the target object moves, it needs to overcome the pushing or pulling force, so as to achieve the resistance effect. In limit mode, the hydraulic cylinder controls the extension length of the cylinder rod 24 to fix the target object in a designated position, thus achieving the limit function. It can accurately position or prevent the target object from moving.

[0040] Not limited to this example, the resistance hydraulic cylinder can be directly mounted on the base plate 1 and as close as possible to the turntable 7 so that the force corresponds as closely as possible to the screw shaft.

[0041] A telescopic frame 26 is fixed to the bottom of the base frame 23. The telescopic frame 26 is centrally located below the turntable 7, and its length corresponds to the radial direction of the turntable 7. An adjusting screw 27 is rotatably mounted centrally on the bottom surface of the telescopic frame 26. An adjusting motor for driving the adjusting screw 27 is installed at one end of the telescopic frame 26. A nut is fitted onto the adjusting screw 27. Second slide rails 28 are symmetrically installed on both sides of the adjusting screw 27, and second sliders 29 are slidably fitted onto the second slide rails 28. An adjusting slide table 30 with a linear adjustment stroke relative to the radial direction of 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. A pressure sensor is installed between the second slider 29 and the adjusting slide table 30 to obtain pressure feedback data obtained by the pressure rod 38.

[0042] Vertically extending supports 31 are fixedly installed at both ends of the adjusting slide 30. The supports 31 are located on both sides of the turntable 7. The spacing between the supports 31 is sufficient to accommodate the turntable 7 assembly, the screw shaft, and the machine head 4, so that the vertical movement of the supports 31 does not interfere with other components in the middle. The supports 31 and the adjusting slide 30 form a U-shaped support structure. A vertically installed third slide rail 32 is fixedly installed on the upper part of the supports 31. A vertically sliding third slider 33 is fitted on the third slide rail 32. An electromagnetic pin 34 is fixedly installed on the lower part of the third slider 33. The electromagnetic pin 34 has an electromagnetically driven locking pin on the inner side near the rail. The locking pin limits and locks the third slider 33 by abutting against the third slide rail 32. A connecting seat 35 is fixed to the third slider 33 by bolts. The connecting seat 35 is provided with a rotating seat 36 rotatably connected to it. A connecting head 37 is fixed to the rotating seat 36. The connecting head 37 has a through mounting hole and also includes a pressure rod 38. In this example, the pressure rod 38 can be a steel rod with a circular cross-section, which has high hardness and strong resistance to deformation. After the two ends of the pressure rod 38 pass through the mounting holes on the same side, the pressure rod 38 is horizontally mounted between the two uprights 31. The two ends of the pressure rod 38 can be equipped with stops or detachable stops. In this example, the two ends adopt a threaded structure and are connected by a wing-shaped nut 39 for easy manual operation and to limit the two ends of the pressure rod 38, keeping the pressure rod 38 between the two rotating seats 36 and horizontally mounted between the two uprights 31.

[0043] The bottom end of the third slide rail 32 is provided with a support 40 for physically limiting the third slider 33.

[0044] Since the two ends of the slide bar are oscillatingly connected to the sliders on the same side, and the height of the sliders on both sides is adjustable based on the third slide rail 32, the pressure bar 38 can contact the blade surface of the helical shaft to be tested at any angle.

[0045] Based on the above structure, the following explanation is provided regarding the principle of this device in detecting the screw shaft:

[0046] The screw shaft is clamped and installed: the upper limit member 13 and the lower limit member 9 are used to clamp and limit the two ends of the screw shaft core. After clamping, the rotation of the screw shaft can be adapted based on the rotating sleeve 12. The rotation or stationary drive control of the screw shaft is realized through the turntable 7, so that the screw shaft can have three cooperation detection modes after clamping: keeping it stationary, adjusting the circumferential angle, and simulating working conditions.

[0047] After the spiral shaft is installed, the upright support structure is formed on both sides of the spiral shaft by the stand 31. The second slide rail 28 allows the two stands 31 to be radially adjusted relative to the spiral shaft, so that the distance between the pressure rod 38 and the shaft core is adjustable. In other words, the position of the pressure rod 38 pressing on the blade (screw blade) can be flexibly adjusted so that the pressure position is close to the edge of the blade or close to the shaft. This allows the hardness of different positions at the root, top and transition area of ​​the blade to be measured, thus providing complete test data.

[0048] The contact angle between the pressure rod 38 and the blade surface can be flexibly adjusted. By adjusting the pressure rod 38 to be in a tangential position relative to the contact point, and fixing the sliders at both ends, the angle of the pressure rod 38 can be determined. When the pressure rod 38 applies pressure to the blade, based on the adjusted tilt state, it can obtain as vertical pressure as possible at the contact point, reducing detection errors caused by improper pressure direction.

[0049] Therefore, by adjusting the tilt angle of the pressure rod 38, a more reasonable pressure can be applied to the blade. The relative position of the pressure rod 38 can also be adjusted, including the height (by manually locking the third slider 33) and the eccentricity (the position of the distance from the shaft core). By cooperating with the rotation of the screw shaft, the relative circumferential position of the blade on the outside can be adjusted, thereby enabling detection at different positions on the blade without blind spots. The pressure rod 38 can be located on the upper or lower side of the blade, overcoming the spatial limitation problem caused by the irregularity of the blade.

[0050] During testing, this device employs the following two testing methods:

[0051] 1. Pressure resistance test mode:

[0052] 1.1 The area to be tested is located on the upper surface of the blade:

[0053] S1 inserts the bottom end of the helical shaft under test into the lower limit piece, and lowers the upper limit piece into the top end of the helical shaft core under test, thus completing the clamping of the helical shaft under test.

[0054] S2 adjusts the circumferential state of the screw shaft based on the rotation of the turntable, so that the area of ​​the blade to be tested is located in the center of the outer side.

[0055] S3 keeps the resistance hydraulic cylinder in the limit mode, so that the height position of the holding rod remains unchanged;

[0056] S4 Place the pressure bar above the surface of the area to be measured, lift the third sliders on both sides respectively, and fit the two ends of the pressure bar onto the third sliders on both sides respectively. Then adjust the angle of the pressure bar so that the tilt angle of the pressure bar is as tangent as possible to the contact point of the blade. Activate the electromagnetic pin to lock the third sliders on both sides and keep the pressure bar in this state.

[0057] The S5 start-up motor causes the turntable to rotate, and the rotation trend is opposite to the working rotation direction, so it has a thrust to push the pressure rod upward, so that there is pressure between the pressure rod and the contact point;

[0058] The S6 obtains the increase and change of torque based on the torque sensor, and records the maximum torque value when the blade is damaged, with the blade damage as the cutoff point; and obtains the pressure data at the time of damage through the pressure sensor.

[0059] 1.2 The area to be tested is located on the lower surface of the blade:

[0060] The steps are largely the same as those on the upper surface, with the following differences:

[0061] In step s4, the pressure bar is placed on the test area on the lower surface of the blade, and both ends of the pressure bar are installed on the third slider on the same side. The angle of the pressure bar is adjusted so that the contact point between the pressure plate and the bottom surface of the blade is as tangent and inclined as possible. The electromagnetic pin is activated to lock the third slider on both sides, so that the pressure bar remains in this state.

[0062] In step s6, the output motor is started to make the turntable have a rotation tendency, and the rotation tendency is in the same direction as the working condition, which has a thrust that pushes the pressure rod downward.

[0063] 2. Load strength testing mode:

[0064] 2.1 The area to be tested is located on the upper surface of the blade:

[0065] S1 inserts the bottom end of the helical shaft under test into the lower limit piece, and lowers the upper limit piece into the top end of the helical shaft core under test, thus completing the clamping of the helical shaft under test.

[0066] S3 positions the lifting frame at the bottom of its travel.

[0067] S4 places the pressure rod on the upper surface of the blade located in the middle of the spiral shaft, lifts the third sliders on both sides and engages with the two ends of the pressure rod, adjusts the angle of the pressure rod so that its tilt angle is as tangent as possible to the contact point of the blade, and activates the electromagnetic pin to lock the third sliders on both sides, keeping the pressure rod in this state;

[0068] The S5 starting resistance hydraulic cylinder is in constant pressure mode, causing the control cylinder rod to output a fixed pulling force F (this pulling force F is transmitted through the pressure rod, forming a resistance F that opposes the rotation of the screw shaft), starting the turntable to rotate, causing the screw shaft to rotate under the load of the pulling force F, driving the pressure rod to push upward. Since the third slider is already locked relative to the upright, when the pressure rod is pushed upward by the screw shaft, it drives the entire upright to move upward under the guidance of the first slide rail. During this process, the control cylinder rod outputs a constant resistance F, which forms a load on the rotation of the screw shaft, and the torque effect on the rotation is obtained through the torque sensor.

[0069] 2.2 The area to be tested is located on the lower surface of the blade:

[0070] S1 inserts the bottom end of the helical shaft under test into the lower limit piece, and lowers the upper limit piece into the top end of the helical shaft core under test, thus completing the clamping of the helical shaft under test.

[0071] S3 positions the lifting frame at the top of its travel.

[0072] S4 places the pressure rod on the lower surface of the blade located in the middle of the spiral shaft, lifts the third sliders on both sides and engages with the two ends of the pressure rod, adjusts the angle of the pressure rod so that its tilt angle is as tangent as possible to the contact point of the blade, and activates the electromagnetic pin to lock the third sliders on both sides, keeping the pressure rod in this state;

[0073] The S5 starting resistance hydraulic cylinder is in constant pressure mode, causing the control cylinder rod to output a fixed pulling force F. This pulling force F is transmitted through the pressure rod, forming a resistance F that hinders the rotation of the screw shaft. This starts the turntable to rotate, causing the screw shaft to rotate under the load of resistance F. Torque data, resistance F data, and pressure data are recorded.

[0074] By testing the compressive strength, the pressure and torque required to damage the blade can be obtained. This not only provides data on the ultimate pressure that different locations on the blade can withstand, but also simultaneously acquires torque data under these conditions. Combining this multi-dimensional data makes the data model more complete. Because this device allows for flexible adjustment of the compression location, the testing location is not limited to the blade root, edge, top surface, bottom surface, or height, resulting in a more comprehensive data structure.

[0075] By testing the load strength, the working condition of the helical shaft rotating with resistance can be simulated. By setting different resistances, the influence on the rotating shaft core and the pressure influence on the blades can be obtained. By increasing the resistance data, the load-bearing situation of the blades during resistance rotation can be observed, the working state can be restored, and the data can be made more instructive and reliable.

[0076] Therefore, this device can be used to perform multi-dimensional strength testing on the juicer's screw shaft, which can not only break the limitations of the testing position, but also take into account the surface curvature of the blade, improve the testing accuracy, and build more multi-dimensional, three-dimensional, complete and simulated data information to provide feedback and guidance for the design of the screw shaft.

Claims

1. A juicer auger shaft strength testing device, characterized in that, The system includes a main unit (3), on which a mounting bracket (6) is fixedly mounted. A turntable (7) is rotatably mounted on the mounting bracket (6). The turntable (7) is driven to rotate by an output motor installed inside the main unit (3). A torque sensor is mounted on the output motor. A screw shaft to be measured is coaxially fixed on the turntable (7). Vertically extending supports (31) are symmetrically arranged on both sides of the turntable (7). A third slide rail (32) is mounted on the support (31). A third slider (33) with locking and limiting function is slidably connected to the upper and lower parts. A connecting seat (35) is fixed on the third slider (33). A rotating seat (36) is rotatably connected to the connecting seat (35). A connector (37) is fixed on the rotating seat (36). A mounting hole is passed through the connector (37). A pressure rod (38) is provided between the two uprights (31). The two ends of the pressure rod (38) pass through the mounting hole on the same side. The circumferential surface of the pressure rod (38) is used to contact the surface of the spiral shaft blade.

2. The juicer screw shaft strength testing device according to claim 1, characterized in that, The lower part of the third slider (33) is fixedly equipped with an electromagnetic pin (34), which has an electromagnetically driven locking pin on the inner side near the track.

3. The juicer screw shaft strength testing device according to claim 1, characterized in that, The pressure rod (38) has threaded structures at both ends, and is threaded with wing-shaped nuts (39) respectively.

4. The juicer screw shaft strength testing device according to claim 1, characterized in that, The turntable (7) has a lower top seat (8) fixedly connected to it at its center. The lower top seat (8) has a lower limit member (9) fixed to it at its center. The lower limit member (9) is circumferentially stopped with the bottom end of the spiral shaft core. The upper part of the main unit (3) has a machine head (4). The machine head (4) has a clamping seat (10) fixedly installed on it. The clamping seat (10) has a lifting slide (11) at a coaxial position above the turntable (7). The lifting slide (11) has a through-hole that is connected to the turntable (7). The rotating sleeve (12) is designed for vertical movement. Inside the rotating sleeve (12), an upper limit member (13) is rotatably connected via a bearing. The upper limit member (13) is circumferentially stopped at the top of the spiral shaft core. Above the rotating sleeve (12), a clamping hydraulic cylinder (14) is fixedly installed relative to the machine head (4). At the bottom of the clamping hydraulic cylinder (14), a clamping cylinder rod (15) is provided for telescopic cooperation. The bottom of the clamping cylinder rod (15) is fixedly connected to the top of the rotating sleeve (12).

5. The juicer screw shaft strength testing device according to claim 1, characterized in that, The mounting bracket (6) has a mounting ring at its front end. Above the mounting ring is a rotating connection to the turntable (7) via a bearing seat. Below the turntable (7) is a passive gear (16) fixedly connected to it. The mounting bracket (6) has a rotatable transmission gear (17) meshing with the passive gear (16). The transmission gear (17) is driven by an output motor.

6. The juicer screw shaft strength testing device according to claim 1, characterized in that, The turntable (7) is provided with a base frame (23) below it. The two ends of the base frame (23) are provided with lifting frames (20) arranged symmetrically in parallel with the mounting frame (6). The lifting frames (20) are equipped with a vertically extending first slide rail (21). The first slide rail (21) is fitted with a first slider (22). The first slider (22) is fixed on the host (3) or the mounting frame (6). It also includes a resistance hydraulic cylinder fixed relative to the host (3). The resistance hydraulic cylinder outputs a control cylinder rod (24) that is telescopically coordinated with it. The end of the control cylinder rod (24) is fixedly installed with the base frame (23). The resistance hydraulic cylinder has two working modes: constant pressure mode and limit mode. In constant pressure mode, the control cylinder rod (24) outputs a constant force F. In limit mode, the control cylinder rod (24) stops to achieve the limit function. Yes, the bottom of the base frame (23) is fixed with a telescopic frame (26), the telescopic frame (26) is centrally located below the turntable (7), the length direction of the telescopic frame (26) corresponds to the radial direction of the turntable (7), the bottom surface of the telescopic frame (26) is centrally rotatably mounted with an adjusting screw (27) driven by an adjusting motor, the adjusting screw (27) is fitted with a screw nut, the two sides of the adjusting screw (27) are symmetrically mounted with second slide rails (28), the second slide rails (28) are slidably fitted with second sliders (29), the bottom of the telescopic frame (26) is provided with an adjusting slide table (30) with a linear adjustment stroke relative to the radial direction of the turntable (7), the second slider (29) and the screw nut are both fixed on the adjusting slide table (30), and the bottom end of the upright frame (31) is fixed to both ends of the adjusting slide table (30).

7. The juicer screw shaft strength testing device according to claim 6, characterized in that, A pressure sensor is installed between the second slider (29) and the adjusting slide (30) to obtain pressure feedback data obtained by the pressure rod (38).

8. The juicer screw shaft strength testing device according to claim 6, characterized in that, In specific testing, the methods used to test the strength of the helical shaft include: compressive strength testing and load strength testing. The pressure resistance test method is to fix the spiral shaft in the center of the turntable (7), keep the pressure rod (38) in contact with the surface of the spiral shaft blade and stop it, start the turntable (7) to rotate until the blade is damaged, and obtain the test data. The test data includes spiral shaft torque data and blade pressure data. The load strength detection method involves fixing the helical shaft in the center of the turntable (7), keeping the pressure rod (38) in contact with the surface of the helical shaft blades, and controlling the cylinder rod (24) to transmit a preset resistance through the pressure rod (38) to start the turntable (7) to rotate, thereby driving the pressure rod (38) to push up or press down. During this process, detection data is obtained, including helical shaft torque data and blade pressure data.

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