Nut screening device

Abstract

The utility model discloses a nut screening device which comprises an installation frame, and the installation frame is connected with a first discharging hopper, a screening mechanism and a controller. The screening mechanism comprises a mounting frame, bearing seats, rotating rollers and a limiting plate set, the mounting frame is connected with the mounting frame, the multiple bearing seats are symmetrically arranged at the two ends of the mounting frame, and the mounting frame is provided with an adjustable feeding assembly and a second discharging hopper; a plurality of rotating rollers are obliquely mounted between the bearing seats at the two ends, and gaps are reserved between the rotating rollers; the rotating roller is divided into a plurality of screening guide grooves by the limiting plate groups; and the controller is electrically connected with the adjustable feeding assembly. According to the nut screening device, the nut flow is controlled through adjustable feeding, the inclined roller structure is matched, screening blind areas caused by vibration attenuation and accumulation are reduced through self-weight rolling and gap screening between the rollers, the screening efficiency and precision of oil-containing nuts can be effectively improved, and meanwhile material adhesion and blocking are avoided.

Description

A nut screening device Technical Field

[0001] This utility model relates to the field of nut screening technology, specifically to a nut screening device. Background Technology

[0002] In the nut processing industry, screening is a crucial step determining product quality and processing efficiency. Traditional manual sorting methods suffer from low efficiency, inconsistent accuracy, and high labor intensity. While existing vibrating screens have improved efficiency to some extent, they still face several challenges in practical applications. First, due to vibration transmission attenuation or material accumulation, nuts in the top area of ​​the screen cannot fully tumble or sink, hindering effective grading through the mesh. Large nuts, in particular, tend to remain on the surface, creating blind spots and affecting screening. Second, when processing high-oil-content nuts such as walnuts and almonds, debris, shells, and oil generated during processing easily adhere to the screen mesh, exacerbating clogging and requiring frequent shutdowns for manual cleaning, severely impacting continuous operation efficiency. Finally, the traditional vibrating screen's simple feed inlet design makes feeding difficult to control, easily leading to localized overload or uneven material distribution on the screen surface, reducing screening accuracy and increasing the risk of material breakage. Therefore, there is an urgent need to optimize and improve existing screening devices to overcome these problems. Summary of the Invention

[0003] In view of the shortcomings of existing vibrating screening devices, such as blind spots, easy clogging of mesh, and uneven feeding, this utility model provides a nut screening device with good screening effect, no clogging, and adjustable feed rate.

[0004] To achieve the above objectives, the technical solution of this utility model is as follows:

[0005] A nut screening device includes a mounting frame, a first discharge hopper fixedly mounted in the middle of the mounting frame, a screening mechanism mounted on the top, and a controller mounted on the side. The screening mechanism includes a mounting frame, bearing seats, rotating rollers, and a limiting plate assembly. The bottom of the mounting frame is connected to the top of the mounting frame, and several bearing seats are symmetrically arranged at both ends. An adjustable feeding assembly is mounted on the side of one bearing seat, and a second discharge hopper is mounted on the side of the other bearing seat. Among the bearing seats at both ends, the bearing seat closer to the adjustable feeding assembly is positioned higher than the bearing seat on the other side. Several rotating rollers are installed at an angle between the two bearing seats at both ends, with a gap for screening between each pair of rotating rollers. The limiting plate assembly is located above the rotating rollers, with the mounting frame connected to both sides. The rotating rollers are divided into several screening guide grooves in the middle, and the adjustable feeding assembly cooperates with the screening guide grooves. The controller is electrically connected to the adjustable feeding assembly.

[0006] Furthermore, the limiting plate assembly includes a pair of L-shaped plates, a pair of threaded connecting rods, and several partition plates. Several limiting nuts are threaded onto the threaded connecting rods. The L-shaped plates are symmetrically arranged on both sides of the mounting frame along the installation position of the rotating roller. The two ends of the two L-shaped plates are connected by threaded connecting rods and limited by nuts. The partition plates pass through the threaded connecting rods and are constrained to the side of the rotating roller by nuts. During operation, the tilt of the partition plates and the spacing between the partition plates can be adjusted simply by adjusting the limiting nuts on the threaded connecting rods, facilitating the guidance of nuts for screening. The partition plates can be quickly disassembled for cleaning or replacement maintenance simply by removing the limiting nuts. Simultaneously, the bottom of the partition plates is attached to the side of the rotating roller, scraping away any adhering material as the roller rotates. Adjusting the spacing and tilt angle of the partition plates by the nuts allows the screening channel width to adapt to the nut particle size grading requirements. The bottom of the partition plates contacts the rotating roller, creating a dynamic scraping self-cleaning function, effectively removing adhering debris from the roller surface. The partition plates are also easy to disassemble for cleaning and maintenance.

[0007] Furthermore, the adjustable feeding assembly includes a feeding hopper, a distributing trough, and a vibration mechanism electrically connected to the controller. A connecting rod is mounted on the mounting frame, and a mounting plate is correspondingly mounted on the mounting frame at the bottom of the connecting rod. The connecting rod is fixedly connected to the feeding hopper, and the vibration mechanism is mounted on the mounting plate. The top of the vibration mechanism is fixedly connected to the distributing trough, wherein the bottom of the distributing hopper extends into the distributing trough. A discharge port is provided on the side of the distributing trough, and an L-shaped adjusting plate that matches the discharge port is movably installed inside the distributing trough. The L-shaped adjusting plate is connected to the distributing trough via a limiting mechanism. A guide plate is provided inside the discharge port, and the end of the guide plate connects to a screening guide trough. By controlling the height of the L-shaped adjusting plate, the opening of the discharge port can be adjusted to facilitate control of the nut output. In use, the controller is turned on, and the nuts fall from the feeding hopper into the distributing trough. The vibration mechanism is activated, causing the nuts to quickly exit from the outlet of the distributing trough and enter the screening guide trough for sieving via the guide plate.

[0008] Furthermore, a strip groove is provided on the material distribution trough above the discharge port; the limiting mechanism includes a threaded post, a silicone gasket, and a hand-tightening nut; the threaded post is movably disposed within the strip groove, and its end is fixedly connected to an L-shaped adjusting plate; the silicone gasket is movably disposed on the threaded post, and the threaded post is connected to the hand-tightening nut via threads. By tightening the hand-tightening nut in conjunction with the silicone gasket, the threaded post can be restricted to a certain position in the strip groove. The structure is simple, and the adjustment is simple and convenient.

[0009] Furthermore, the vibration mechanism includes a spring and a vibration motor electrically connected to the controller. The bottom of the spring is fixedly connected to the mounting plate, and the top of the spring is fixedly connected to the vibration motor. The top of the vibration motor is fixedly connected to the material distribution trough. Through the combined excitation mode of the spring and the vibration motor, the controller precisely adjusts the vibration frequency and amplitude to achieve high-frequency micro-amplitude vibration of the material distribution trough. This ensures that the nuts flow evenly in the trough and avoids accumulation, while the buffering effect of the spring reduces vibration energy loss and equipment structural stress, extending the service life of the motor.

[0010] Furthermore, the mounting frame also includes a lead screw adjustment assembly, which includes a sleeve, a lead screw, a lead screw nut, and an adjustment block. Both ends of the sleeve are fixedly connected to the mounting frame, and the top of the sleeve has several alternating moving grooves and mounting grooves. The two ends of the lead screw are rotatably mounted inside the sleeve via bearings A, with one end extending outward through the mounting frame and fixedly connected to the adjustment block at its end. Several lead screw nuts and bearings B are alternately arranged on the lead screw, with the top of the lead screw nut extending into the moving groove, and the top of bearing B forming the mounting groove. Several bearing seats are connected to the lead screw nut or bearing at their bottoms. In use, rotating the adjustment block rotates the lead screw, causing the lead screw nut to move, which in turn moves the bearing seat connected to the lead screw nut, while the position of the bearing seat connected to the bearing remains unchanged. This allows for adjustment of the spacing between the bearing seats, and thus, adjustment of the gap between the rotating rollers. This method is suitable for screening nuts of different sizes or types.

[0011] Furthermore, the controller employs a microcontroller. Microcontrollers offer advantages such as fast control response, low power consumption, and convenient maintenance, making the device easy to use.

[0012] Furthermore, the bottom of the mounting frame is also equipped with support feet. The support feet can be adjusted in height, making the device more stable when the installation position is uneven.

[0013] How to use:

[0014] Nuts are added to the adjustable feeding assembly. During use, the flow rate of nuts can be controlled by adjusting the adjustable feeding assembly, so that the nuts enter the screening guide trough of the screening mechanism evenly. Small nuts will fall along the gap into the first discharge hopper, while large nuts will slide down the roller surface of the rotating roller into the second discharge hopper to achieve grading and screening. For nuts with high oil content, the non-mesh structure of the roller gap avoids debris adhesion and blockage. When it is necessary to adjust the screening accuracy, the feeding rate is adjusted to ensure a dynamic balance between the residence time of nuts on the roller surface and the screening efficiency, thereby solving the problems of blind spot retention, mesh blockage and feed overload of traditional vibrating screens.

[0015] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0016] 1. This utility model allows for the adjustment of the nut feed rate by controlling an adjustable feeding component. Combined with tilted rotating rollers, with one end closer to the feeding component being higher than the other, the nuts can roll forward naturally under gravity. At the same time, gaps are left between every two rotating rollers for screening. This not only effectively reduces blind spots caused by vibration transmission attenuation or material accumulation, but also allows large nuts to sink smoothly and pass through the mesh for grading, thus improving screening efficiency and accuracy.

[0017] 2. The dynamic scraping roller surface at the bottom of the partition of this utility model achieves self-cleaning, which can effectively prevent the accumulation of grease and debris; the screw adjustment component moves the screw nut in conjunction with the rotating adjustment block to precisely control the expansion and contraction of the roller gap, which can be adapted to the screening specifications of multiple types of nuts without disassembly and assembly; the sleeve guide structure ensures adjustment accuracy and stability; and the controller can facilitate the discharge control operation.

[0018] 3. This utility model achieves high-frequency micro-amplitude vibration of the material distribution trough through a combination of vibration motor and spring excitation. Combined with the height adjustment of the L-shaped adjustment plate to adjust the opening of the discharge port, it accurately controls the flow rate of nuts and evenly spreads the material, avoiding overload of the screen surface. The spring buffering effect reduces vibration transmission loss and ensures the service life of the motor. The limiting mechanism uses a threaded column and a silicone gasket in conjunction with a hand-tightened nut to achieve quick positioning and anti-loosening of the L-shaped adjustment plate, simplifying the opening adjustment process. Attached Figure Description

[0019] Figure 1 is a schematic diagram of the overall structure of this utility model.

[0020] Figure 2 is a schematic diagram of the connection relationship between the adjustable feeding assembly and the mounting frame of this utility model.

[0021] Figure 3 is a schematic diagram showing the connection relationship between the material distribution trough and other components of this utility model.

[0022] Figure 4 is a schematic diagram of the specific structure of the lead screw adjustment assembly of this utility model.

[0023] Attached image labels:

[0024] Mounting Frame—1. First Discharge Hopper—2. Screening Mechanism—3. Mounting Frame—31. Connecting Rod—311. Mounting Plate—312. Bearing Seat—32. Rotating Roller—33. Limiting Plate Assembly—34. L-Shaped Plate—341. Threaded Connecting Rod—342. Partition Plate—343. Limiting Nut—344. Screw Adjustment Assembly—35. Sleeve Rod—351. Screw—352. Screw Nut—353. Adjusting Block— 354, Bearing A—355, Bearing B—356, Controller—4, Adjustable Feeding Assembly—5, Feed Hopper—51, Distributor Slot—52, Discharge Port—521, L-shaped Adjusting Plate—522, Threaded Column—523, Hand-tightening Nut—524, Silicone Gasket—525, Vibration Mechanism—53, Spring—531, Vibration Motor—532, Guide Plate—54, Strip Slot—55, Second Discharge Hopper—6. Detailed Implementation

[0025] The present invention will be further described below with reference to the accompanying drawings.

[0026] Example 1: A nut screening device includes a mounting frame 1, a first discharge hopper 2 fixedly disposed in the middle of the mounting frame 1, a screening mechanism 3 disposed at the top, and a controller 4 disposed on the side; the screening mechanism 3 includes a mounting frame 31, bearing seats 32, rotating rollers 33, and a limiting plate assembly 34. The bottom of the mounting frame 31 is connected to the top of the mounting frame 1, and several bearing seats 32 are symmetrically disposed at both ends. An adjustable feeding assembly 5 is disposed on the mounting frame 31 on the side of one bearing seat 32, and a second discharge hopper 5 is disposed on the mounting frame 31 on the side of the other bearing seat 32. The hopper 6 has bearing seats 32 at both ends, with the bearing seat 32 near the adjustable feeding assembly 5 installed higher than the bearing seat 32 on the other side. Several rotating rollers 33 are installed at an angle between the two bearing seats 32, with a gap for screening between each pair of rotating rollers 33. The limiting plate group 34 is set above the rotating rollers 33, with mounting brackets 31 connected to both sides. The rotating rollers 33 are divided into several screening guide grooves in the middle. The adjustable feeding assembly 5 cooperates with the screening guide grooves. The controller 4 is electrically connected to the adjustable feeding assembly 5.

[0027] How to use:

[0028] Nuts are added to the adjustable feeding assembly 5. During use, the flow rate of nuts can be controlled by adjusting the adjustable feeding assembly 5, so that the nuts enter the screening guide groove of the screening mechanism 3 evenly. Small nuts will fall along the gap into the first discharge hopper 2, while large nuts will slide down the roller surface of the rotating roller 33 into the second discharge hopper 6 to achieve graded screening. For nuts with high oil content, the non-mesh structure of the roller gap avoids debris adhesion and blockage. When it is necessary to adjust the screening accuracy, the feeding rate is adjusted to ensure the dynamic balance between the residence time of nuts on the roller surface and the screening efficiency, thereby solving the problems of blind spot retention, mesh blockage and feeding overload of traditional vibrating screens.

[0029] Example 2: Unlike Example 1, the limiting plate assembly 34 includes a pair of L-shaped plates 341, a pair of threaded connecting rods 342, and several partition plates 343. Several limiting nuts 344 are threaded onto the threaded connecting rods 342. The L-shaped plates 341 are symmetrically arranged on both sides of the mounting frame 31 along the installation position of the rotating roller 33. The two ends of the two L-shaped plates 341 are connected by the threaded connecting rods 342 and limited by nuts. The partition plates pass through the threaded connecting rods 342 and are restricted to the side of the rotating roller 33 by nuts. During operation, simply adjust the limiting nut 344 on the threaded connecting rod 342 to adjust the inclination of the partition 343 and the spacing between several partitions 343, which facilitates the sieving of nuts. The partition 343 can be quickly disassembled for cleaning or replacement maintenance simply by removing the limiting nut 344. At the same time, the bottom of the partition is attached to the side of the rotating roller 33, which can scrape off the attached materials on the rotating roller 33 when the roller 33 rotates. By adjusting the spacing and inclination angle of the partitions 343 by the nut, the width of the sieving channel can be adapted to the nut particle size grading requirements. At the same time, the bottom of the partition 343 contacts the rotating roller 33 to form a dynamic scraping self-cleaning function, which effectively removes the debris adhering to the roller surface. The partition 343 can also be easily disassembled for cleaning and maintenance.

[0030] The mounting frame 31 also includes a lead screw adjustment assembly 35, which includes a sleeve 351, a lead screw 352, a lead screw nut 353, and an adjustment block 354. Both ends of the sleeve 351 are fixedly connected to the mounting frame 31, and the top of the sleeve 351 is provided with a plurality of alternating moving grooves and mounting grooves. Both ends of the lead screw 352 are rotatably mounted inside the sleeve 351 via bearings A355, with one end extending outward through the mounting frame 31 and fixedly connected to the adjustment block 354 at its end. The lead screw 352 is provided with a plurality of alternating lead screw nuts 353 and bearings B356, the top of the lead screw nuts 353 extending into the moving groove, and the top of the bearings B356 forming the mounting groove. The bottoms of a plurality of bearing seats 32 are respectively connected to the lead screw nuts 353 or the bearings. In use, rotating the adjusting block 354 causes the lead screw 352 to rotate. The rotation of the lead screw 352 drives the lead screw nut 353 to move, causing the bearing seat 32 connected to the lead screw nut 353 to move. At the same time, the position of the bearing seat 32 connected to the bearing remains unchanged, thus realizing the adjustment of the gap between the bearing seats 32. By adjusting the gap between the bearing seats 32, the gap between the rotating rollers 33 can be adjusted. This method is suitable for screening nuts of different sizes or types.

[0031] Example 3: Unlike Example 1, the adjustable feeding assembly 5 includes a feeding hopper 51, a distributing trough 52, and a vibration mechanism 53 electrically connected to the controller 4; a connecting rod 311 is provided on the mounting frame 31, and a mounting plate 312 is correspondingly provided on the mounting frame 31 at the bottom of the connecting rod 311; the connecting rod 311 is fixedly connected to the feeding hopper 51, and the vibration mechanism 53 is provided on the mounting plate 312, with the top of the vibration mechanism 53 fixedly connected to the distributing trough 52, wherein the bottom of the distributing hopper extends into the distributing trough 52; a discharge port 521 is provided on the side of the distributing trough 52, and an L-shaped adjusting plate 522 that matches the discharge port 521 is movably arranged in the distributing trough 52, and the L-shaped adjusting plate 522 is connected to the distributing trough 52 through a limiting mechanism; a guide plate 54 is provided in the discharge port 521, and the end of the guide plate 54 is connected to the screening guide trough. By controlling the height of the L-shaped adjusting plate 522, the opening of the discharge port 521 can be adjusted to facilitate the control of the nut discharge amount. When in use, the controller 4 is turned on, and the nuts fall from the feed hopper 51 into the distribution trough 52. The vibration mechanism 53 is turned on to vibrate, so that the nuts are quickly discharged from the outlet of the distribution trough 52 and enter the screening guide trough for screening via the guide plate 54.

[0032] The material distribution trough 52 above the discharge port 521 is also provided with a strip groove 55; the limiting mechanism includes a threaded post 523, a silicone gasket 525, and a hand-tightening nut 524; the threaded post 523 is movably disposed within the strip groove 55, and its end is fixedly connected to an L-shaped adjusting plate 522; the silicone gasket 525 is movably disposed on the threaded post 523, and the threaded post 523 is threadedly connected to the hand-tightening nut 524. By tightening the hand-tightening nut 524 in conjunction with the silicone gasket 525, the threaded post 523 can be limited to a certain position in the strip groove 55. The structure is simple and the adjustment is simple and convenient.

[0033] Example 4: Unlike Example 3, the vibration mechanism 53 includes a spring 531 and a vibration motor 532 electrically connected to the controller 4. The bottom of the spring 531 is fixedly connected to the mounting plate 312, and the top is fixedly connected to the vibration motor 532. The top of the vibration motor 532 is fixedly connected to the material distribution trough 52. Through the combined excitation mode of the spring 531 and the vibration motor 532, the controller 4 precisely adjusts the vibration frequency and amplitude to achieve high-frequency micro-amplitude vibration of the material distribution trough 52. This ensures that the nuts flow evenly within the trough, preventing accumulation, while the buffering effect of the spring 531 reduces vibration energy loss and structural stress on the equipment, extending the motor's service life.

[0034] The controller 4 uses a microcontroller. Microcontrollers have the advantages of fast control response, low power consumption, and convenient maintenance, making the device easy to use.

[0035] The bottom of the mounting frame 1 is also equipped with support feet. The support feet can be adjusted in height, and the device can be made more stable when the installation position is uneven.

[0036] Numerous specific details are set forth in this specification. However, it will be understood that embodiments of this invention may be practiced without these specific details. In some instances, well-known methods, structures, and techniques have not been shown in detail so as not to obscure the understanding of this specification.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model, and they should all be covered within the scope of the claims and specification of this utility model.

Claims

1. A nut screening apparatus characterized by: The system includes an installation frame (1), a first discharge hopper (2) fixedly installed in the middle of the installation frame (1), a screening mechanism (3) installed at the top, and a controller (4) installed on the side; the screening mechanism (3) includes an installation frame (31), bearing seats (32), rotating rollers (33) and a limiting plate group (34). The bottom of the installation frame (31) is connected to the top of the installation frame (1), and several bearing seats (32) are symmetrically arranged at both ends. An adjustable feeding assembly (5) is provided on the side of the installation frame (31) of one end bearing seat (32), and a second discharge hopper (6) is provided on the side of the installation frame (31) of the other end bearing seat (32). In the bearing seats (32) at both ends, the bearing seat (32) closer to the adjustable feeding assembly (5) is installed higher than the bearing seat (32) on the other side. Several rotating rollers (33) are installed at an angle between the two bearing seats (32), and a gap for screening is left between each pair of rotating rollers (33). The limiting plate group (34) is set above the rotating roller (33), and the mounting frame (31) is connected to both sides respectively. The rotating roller (33) is divided into several screening guide grooves in the middle position. The adjustable feeding assembly (5) cooperates with the screening guide grooves. The controller (4) is electrically connected to the adjustable feeding assembly (5).

2. The nut screening device as described in claim 1, characterized in that: The limiting plate assembly (34) includes a pair of L-shaped plates (341), a pair of threaded connecting rods (342), and several partition plates (343). Several limiting nuts (344) are threaded onto the threaded connecting rods (342). The L-shaped plates (341) are symmetrically arranged on both sides of the mounting frame (31) along the installation position of the rotating roller (33). The two ends of the two L-shaped plates (341) are connected by the threaded connecting rods (342) and limited by nuts. The partition plates (343) pass through the threaded connecting rods (342) and are restricted to the side of the rotating roller (33) by nuts.

3. A nut sizing device as claimed in claim 1, wherein: The adjustable feeding assembly (5) includes a feeding hopper (51), a distributing trough (52), and a vibration mechanism (53) of an electrical connection controller (4); a connecting rod (311) is provided on the mounting frame (31), and a mounting plate (312) is also provided on the mounting frame (31) at the bottom of the connecting rod (311); the connecting rod (311) is fixedly connected to the feeding hopper (51), and the vibration mechanism (53) is provided on the mounting plate (312), with the top of the vibration mechanism (53) fixedly connected to the feeding hopper (51). A fixed connection is provided in the material distribution trough (52), wherein the bottom of the material distribution hopper extends into the material distribution trough (52); the side of the material distribution trough (52) is provided with a discharge port (521), and an L-shaped adjusting plate (522) that matches the discharge port (521) is movably arranged in the material distribution trough (521). The L-shaped adjusting plate (522) is connected to the material distribution trough (52) through a limiting mechanism; a guide plate (54) is provided in the discharge port (521), and the end of the guide plate (54) is connected to the screening guide trough.

4. A nut sizing apparatus as claimed in claim 3 wherein: The material distribution groove (52) above the discharge port (521) is also provided with a strip groove (55); the limiting mechanism includes a threaded post (523), a silicone gasket (525) and a hand-tightening nut (524); the threaded post (523) is movably disposed in the strip groove (55) and its end is fixedly connected to an L-shaped adjusting plate (522); the silicone gasket (525) is movably disposed on the threaded post (523) and the threaded post (523) is connected to the hand-tightening nut (524) by threads.

5. The nut screening device as described in claim 3, characterized in that: The vibration mechanism (53) includes a spring (531) and a vibration motor (532) electrically connected to the controller (4). The bottom of the spring (531) is fixedly connected to the mounting plate (312), and the top is fixedly connected to the vibration motor (532). The top of the vibration motor (532) is fixedly connected to the material distribution trough (52).

6. A nut screening device as described in any one of claims 1-5, characterized in that: The mounting frame (31) also includes a lead screw adjustment assembly (35), which includes a sleeve rod (351), a lead screw (352), a lead screw nut (353), and an adjustment block (354). The two ends of the sleeve rod (351) are fixedly connected to the mounting frame (31), and the top of the sleeve rod (351) is provided with several moving grooves and mounting grooves. The two ends of the lead screw (352) are rotatably set inside the sleeve rod (351) through bearing A (355), one end of which extends outward through the mounting frame (31) and is fixedly connected to the adjustment block (354) at the end. Several lead screw nuts (353) and bearings B (356) are provided alternately on the lead screw (352). The top of the lead screw nut (353) extends into the moving groove, and the top of the bearing B (356) is the mounting groove. The bottom of several bearing seats (32) is connected to the lead screw nut (353) or the bearing.

7. A nut sizing device as claimed in claim 1 wherein: The controller (4) is a single-chip microcomputer.

8. A nut sizing device as claimed in claim 1 wherein: The bottom of the mounting frame (1) is also provided with support feet.

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