Automatic nut conveying and screening mechanism

Abstract

The automatic nut conveying and screening mechanism comprises a vibration disc, a discharging channel and a returning channel, a discharging opening of the vibration disc is connected with the discharging channel inclining downwards, the discharging channel is used for discharging nuts, each nut is composed of a nut body and a flange plate located at the bottom of the nut body, the upper end of the discharging channel is open, and the lower end of the discharging channel is open. The two inner side walls of the discharging channel are each provided with a screening strip, the discharging channel is composed of a first channel, a second channel and a third channel which are sequentially connected, and the extending face of the inner bottom wall of the first channel is located above the inner bottom wall of the third channel; according to the nut screening mechanism, the screening strips are arranged on the two side walls of the discharging channel and matched with the screening notches in one side wall, it can be guaranteed that nuts are output in the posture that flange plates face downwards, follow-up packaging or assembling of the nuts is facilitated, the whole mechanism is simple in structure, screening is completed through a mechanical structure, and high reliability is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of fasteners, in particular to the technical field of nut conveying and screening mechanisms. Background Art

[0002] The nut is a part that is screwed together with the screw to perform a fastening function. It is a component involved in all mechanical manufacturing. In order to prevent unqualified nuts from entering the installation process, the nuts need to be screened, and a nut conveying and screening mechanism is generally required.

[0003] The existing patent CN205397273U discloses a vibrating plate screening mechanism for a nut conveyor, which includes a vibrating plate body, an inner side of which is provided with a spiral track that spirally ascends, the front end of the spiral track is connected to the bottom of the vibrating plate body, and the end of the spiral track is connected to a convex track in the shape of a "convex" character, and the end of the convex track is connected to a discharge pipe; a groove shell is provided at the side end of the convex track, and the groove shell is connected to the outer edge of the vibrating plate body, and the bottom end of the groove shell is connected to the vibrating plate body; an arc-shaped blocking piece is provided at the connection between the spiral track and the convex track; it can screen nuts and arrange them for output, but it cannot output flange nuts in a unified direction, which will affect the subsequent automated installation.

[0004] The existing patent CN213975889U discloses a nut conveying device with a screening function, which adds nuts to be screened along the feeding position. Under the guidance of the conical protrusion, the nuts will rotate along the edge of the rotating plate. Under the action of the vibration component, the nuts on the rotating plate will be shaken apart, which is beneficial for later screening. The size of the movable door is adjusted according to the size of the nut. Then, when the surface features of the nut obtained by the camera recognition module meet the requirements, the servo motor will drive the toggle plate to rotate so that the nut is discharged along one side of the first discharge port. When the surface features of the nut obtained by the camera recognition module do not meet the requirements, the servo motor will drive the toggle plate to rotate in the opposite direction so that the nut is discharged along the second discharge port, thereby completing the screening of the nuts; although it can identify the posture of the nuts through the camera recognition module, it has high technical requirements for camera recognition, which leads to high cost. At the same time, in order to ensure the accuracy of recognition, the output speed of the nuts cannot be too fast, which will limit the output speed of the nuts. Summary of the Invention

[0005] The purpose of the present invention is to solve the problems in the prior art and to propose an automatic nut conveying and screening mechanism, which can enable the nuts to be automatically screened, arranged, and output automatically, thereby effectively improving production efficiency.

[0006] To achieve the above-mentioned purpose, the present invention proposes an automatic nut conveying and screening mechanism, including a vibrating plate, a discharging channel and a return channel, the discharge port of the vibrating plate being connected to a downwardly inclined discharging channel, the discharging channel being used for discharging nuts, the nut being composed of a nut body and a flange plate located at the bottom of the nut body, the upper end of the discharging channel being open, a screening bar being provided on both inner side walls of the discharging channel, the discharging channel being composed of a first channel, a second channel and a third channel connected in sequence, the extension surface of the inner bottom wall of the first channel being located above the inner bottom wall of the third channel, the inner bottom wall of the second channel connecting the inner bottom wall of the first channel and the inner bottom wall of the third channel, a screening notch being provided on a side wall of the third channel, the upper end of the screening notch being open, the screening notch cutting off the screening bar, the vibrating plate being connected to a return channel connected to the inside of the vibrating plate, the return channel being inclined upward from the side of the vibrating plate, and the top of the return channel being located directly below the screening notch.

[0007] Preferably, the gaps between the screening bars allow the nut body to pass vertically, and the gaps between the screening bars are smaller than the outer diameter of the flange.

[0008] Preferably, the distance between the screening bar and the inner bottom wall of the first channel is greater than the height of the flange, and the distance between the screening bar and the inner bottom wall of the first channel is less than the height of the nut body.

[0009] Preferably, the end of the screening bar close to the discharge port of the vibration plate is a guiding surface, and the guiding inclined surfaces on the two screening bars together form a trumpet-shaped guiding port.

[0010] Preferably, the distance between the screening bar and the inner bottom wall of the third channel is greater than the height of the nut body.

[0011] Preferably, the screening notch is rectangular, and the length of the screening notch in the extension direction of the third channel is greater than the outer diameter of the flange.

[0012] Preferably, the distance between the bottom wall of the screening notch and the screening bar is greater than the height of the nut body, and the distance between the bottom wall of the screening notch and the inner bottom wall of the third channel is greater than the height of the flange.

[0013] Preferably, the top of the return channel includes a receiving hopper, and the lowest point of the return channel is flush with the inner bottom wall of the vibration plate.

[0014] Preferably, a first bracket and a second bracket are fixed to the outer wall of the vibration plate, the first bracket is fixed to the discharge channel, and the second bracket is fixed to the return channel.

[0015] Beneficial effects of the present invention: The present invention arranges screening bars on the two side walls of the discharge channel, and cooperates with the screening notch on one of the side walls, so that the nuts can be output with the flange facing downward, which is convenient for subsequent packaging or assembly of the nuts. The structure of the entire mechanism is simple, and the screening is completed through a mechanical structure, which has high reliability.

[0016] The features and advantages of the present invention will be described in detail through embodiments with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a front view of the automatic nut conveying and screening mechanism of the present invention; Figure 2 This is a main cross-sectional view of the discharge channel of the nut automatic conveying and screening mechanism of the present invention. Figure 3 This is a top view of the first channel of the automatic nut conveying and screening mechanism of the present invention; Figure 4 This is a schematic diagram of the nuts in the third channel when the flange of the nut automatic conveying and screening mechanism of the present invention is facing downward; Figure 5 This is a schematic diagram of the nuts in the third channel when the flange of the nut automatic conveying and screening mechanism of the present invention is facing upward; Figure 6 This is a front view of the third channel at the screening notch of the nut automatic conveying and screening mechanism of the present invention; Figure 7 It is a top view of the third channel at the screening notch of the automatic nut conveying and screening mechanism of the present invention.

[0018] In the figure: 1-discharge channel, 2-vibration plate, 3-return channel, 4-nut body, 10-screening bar, 11-first channel, 12-second channel, 13-third channel, 15-screening notch, 21-first bracket, 22-second bracket, 30-receiving hopper, 40-flange. DETAILED DESCRIPTION

[0019] Example 1: See Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 and Figure 6The nut automatic conveying and screening mechanism of the present invention includes a vibrating plate 2, a discharging channel 1 and a return channel 3. The discharging port of the vibrating plate 2 is connected to a downwardly inclined discharging channel 1, and the discharging channel 1 is used for discharging nuts. The nut is composed of a nut body 4 and a flange 40 located at the bottom of the nut body 4. The upper end of the discharging channel 1 is open, and a screening strip 10 is provided on both inner side walls of the discharging channel 1. The discharging channel 1 is composed of a first channel 11, a second channel 12 and a third channel 13 connected in sequence. The first The extended surface of the inner bottom wall of the channel 11 is located above the inner bottom wall of the third channel 13. The inner bottom wall of the second channel 12 connects the inner bottom wall of the first channel 11 and the inner bottom wall of the third channel 13. A screening notch 15 is provided on a side wall of the third channel 13. The upper end of the screening notch 15 is open. The screening notch 15 cuts off the screening bar 10. The vibration disk 2 is connected to a return channel 3 connected to the inside of the vibration disk 2. The return channel 3 is inclined upward from the side of the vibration disk 2, and the top of the return channel 3 is located directly below the screening notch 15.

[0020] The gaps between the screening bars 10 allow the nut body 4 to pass vertically therethrough, and the gaps between the screening bars 10 are smaller than the outer diameter of the flange 40 .

[0021] The distance between the screening bar 10 and the inner bottom wall of the first channel 11 is greater than the height of the flange 40 , and the distance between the screening bar 10 and the inner bottom wall of the first channel 11 is less than the height of the nut body 4 .

[0022] In order to ensure that the nut can enter between the two screening bars 10 with the flange 40 facing upward, the end of the screening bar 10 close to the discharge port of the vibration plate 2 is a guiding surface, and the guiding inclined surfaces on the two screening bars 10 together form a trumpet-shaped guiding opening.

[0023] The distance between the screening bar 10 and the inner bottom wall of the third channel 13 is greater than the height of the nut body 4 .

[0024] The screening notch 15 is rectangular, and the length of the screening notch 15 in the extending direction of the third channel 13 is greater than the outer diameter of the flange 40 .

[0025] The distance between the bottom wall of the screening notch 15 and the screening bar 10 is greater than the height of the nut body 4 , and the distance between the bottom wall of the screening notch 15 and the inner bottom wall of the third channel 13 is greater than the height of the flange 40 .

[0026] Example 2: In order to prevent the return channel 3 from affecting the upward movement of the nut in the vibration plate 2 , the top of the return channel 3 includes a receiving hopper 30 , and the lowest point of the return channel 3 is flush with the bottom wall of the vibration plate 2 .

[0027] Example 3: A first bracket 21 and a second bracket 22 are fixed to the outer wall of the vibration plate 2 . The first bracket 21 is fixed to the discharge channel 1 , and the second bracket 22 is fixed to the return channel 3 .

[0028] Working process of the present invention: During the operation of the automatic nut conveying and screening mechanism of the present invention, the nuts enter the discharge channel 2 under the action of the vibration plate 1. The nuts enter the discharge channel 2 in two postures, one with the flange 40 facing downward and the other with the flange 40 facing upward.

[0029] For the nut with the flange 40 facing downward, the nut will continue to move along the discharge channel 2 until it leaves the discharge channel.

[0030] For the nut with the flange 40 facing upward, the nut body 4 of the nut will enter between the two screening bars 10 in the first channel 11 under the guidance of the trumpet-shaped guide port, and then the nut will move along with the discharge channel 2. When the nut enters the third discharge channel 3, the flange 40 will be stuck by the screening bar 10, and the nut will be in a suspended state. The nut continues to move along the third channel 3. When the nut moves to the screening notch 15, since there is no screening bar 10 at the screening notch 15, and there is a screening bar 10 on the opposite side of the screening notch 15, the nut will fall toward the side of the screening notch 15 under the action of its own gravity and finally fall into the return channel 3. The fallen nut returns to the vibration plate 2 through the return channel 3.

[0031] The above embodiments are intended to illustrate the present invention, not to limit the present invention. Any solution that is a simple transformation of the present invention falls within the protection scope of the present invention.

Claims

1. Automatic nut conveying and screening mechanism, characterized by: The invention comprises a vibration plate (2), a discharge channel (1) and a return channel (3), wherein the discharge port of the vibration plate (2) is connected to a discharge channel (1) inclined downward, and the discharge channel (1) is used for discharging nuts, and the nuts are composed of a nut body (4) and a flange (40) located at the bottom of the nut body (4). The upper end of the discharge channel (1) is open, and a screening bar (10) is provided on both inner side walls of the discharge channel (1). The discharge channel (1) is composed of a first channel (11), a second channel (12) and a third channel (13) connected in sequence, and the inner bottom of the first channel (11) is provided with a screening bar (10). The extended surface of the wall is located above the inner bottom wall of the third channel (13), the inner bottom wall of the second channel (12) is connected to the inner bottom wall of the first channel (11) and the inner bottom wall of the third channel (13), a screening notch (15) is provided on a side wall of the third channel (13), the upper end of the screening notch (15) is open, and the screening notch (15) cuts off the screening bar (10), and the vibration plate (2) is connected to a return channel (3) connected to the inside of the vibration plate (2), the return channel (3) is inclined upward from the side of the vibration plate (2), and the top of the return channel (3) is located directly below the screening notch (15).

2. The automatic nut conveying and screening mechanism according to claim 1, characterized in that: The gaps between the screening bars (10) allow the nut body (4) to pass vertically, and the gaps between the screening bars (10) are smaller than the outer diameter of the flange (40).

3. The automatic nut conveying and screening mechanism according to claim 1, characterized in that: The distance between the screening bar (10) and the inner bottom wall of the first channel (11) is greater than the height of the flange (40), and the distance between the screening bar (10) and the inner bottom wall of the first channel (11) is less than the height of the nut body (4).

4. The automatic nut conveying and screening mechanism according to claim 1, characterized in that: The end of the screening bar (10) close to the discharge port of the vibration plate (2) is a guide surface, and the guide inclined surfaces on the two screening bars (10) together form a trumpet-shaped guide port.

5. The automatic nut conveying and screening mechanism according to claim 1, characterized in that: The distance between the screening strip (10) and the inner bottom wall of the third channel (13) is greater than the height of the nut body (4).

6. The automatic nut conveying and screening mechanism according to claim 1, characterized in that: The screening notch (15) is rectangular, and the length of the screening notch (15) in the extension direction of the third channel (13) is greater than the outer diameter of the flange (40).

7. The automatic nut conveying and screening mechanism according to claim 6, characterized in that: The distance between the bottom wall of the screening notch (15) and the screening bar (10) is greater than the height of the nut body (4), and the distance between the bottom wall of the screening notch (15) and the inner bottom wall of the third channel (13) is greater than the height of the flange (40).

8. The automatic nut conveying and screening mechanism according to claim 1, characterized in that: The top of the return channel (3) includes a receiving hopper (30), and the lowest point of the return channel (3) is flush with the inner bottom wall of the vibration plate (2).

9. The automatic nut conveying and screening mechanism according to any one of claims 1 to 8, characterized in that: A first bracket (21) and a second bracket (22) are fixed to the outer wall of the vibration plate (2); the first bracket (21) is fixed to the discharge channel (1), and the second bracket (22) is fixed to the return channel (3).

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