An automatic cocoon selection device

Abstract

The present invention discloses an automatic cocoon selection device, belonging to the technical field of cocoon processing. It includes a conveyor line, a cocoon discharging device, a spreading device and a selection machine. The cocoon discharging device is arranged at the inlet end of the conveyor line, the spreading device is arranged on the conveyor line, and the selection machine is arranged at the outlet end of the conveyor line. The present invention can solve the problems of high labor intensity and low work efficiency in manual cocoon selection.

Description

Technical Field

[0001] The present invention belongs to the technical field of cocoon processing, and particularly relates to an automatic cocoon selection device. Background Art

[0002] A cocoon refers to the cocoon of a mulberry silkworm. It is a sac-shaped protective layer in the pupa stage of the mulberry silkworm, containing the pupa body. The cocoon layer can be reeled into silk, and the cocoon floss and waste silk after reeling can be used as raw materials for silk floss and spun silk. Cocoon generally has different shapes such as long oval, oval with a constricted waist, spherical or spindle-shaped, or slightly constricted in the middle. The cocoon has colors such as white, yellow, light green, and flesh red, with a length of about 3 - 4 cm and a diameter of 1.7 - 2.1 cm. The surface is white, with irregular wrinkles and attached silk, showing a villous shape.

[0003] The inventor found in the actual use process that these existing technologies have at least the following technical problems:

[0004] Since cocoons are prone to stick to each other, the machine cannot effectively sort them. Therefore, generally, manual visual inspection is used for cocoon selection, but manual cocoon selection has a large labor intensity and low work efficiency. Summary of the Invention

[0005] To overcome the above deficiencies, through long-term exploration, attempts, multiple experiments and efforts, the inventor of the present invention has continuously reformed and innovated, and proposed an automatic cocoon selection device, which can solve the problems of large labor intensity and low work efficiency in manual cocoon selection.

[0006] The technical solution adopted by the present invention to achieve the above object is: to provide an automatic cocoon selection device, which includes a conveyor line, a cocoon feeding device, a spreading device and a selection machine. The cocoon feeding device is arranged at the inlet end of the conveyor line, the spreading device is arranged on the conveyor line, and the selection machine is arranged at the outlet end of the conveyor line.

[0007] According to an automatic cocoon selection device of the present invention, a further preferred technical solution is: the cocoon feeding device includes: a frame, with a frame feeding port arranged at the top, and a frame discharging port arranged on the frame on one side of the frame feeding port. The conveyor line is arranged below the frame feeding port and extends towards the frame discharging port; a rotating frame, arranged inside the frame, and the rotating frame includes: a power device, a rotating shaft connected to the power device, and rotating blades arranged along the circumference of the rotating shaft.

[0008] According to an automatic cocoon selection device of the present invention, a further preferred technical solution is: on both ends of the rotating shaft, a number of bolt holes are arranged along the circumference. The rotating blade is bolted to the rotating shaft, and an arc-shaped member is arranged at the bottom of the rotating blade. The radian of the arc-shaped member is the same as that of the rotating shaft, and the rotating blade is bolted to the rotating shaft through the arc-shaped member; the power device is a motor, and the output shaft of the motor is fixedly connected to the axis of the rotating shaft.

[0009] An automatic cocoon selection device according to the present invention, a further preferred technical solution thereof is: The spreading device includes: a spreading box disposed on the conveyor line, the spreading box having openings at the front and rear ends, the front end being the spreading box inlet, and the rear end being the spreading box outlet for controlling the thickness; a cocoon separating assembly composed of a plurality of cocoon separating partitions, the cocoon separating partitions being evenly spaced in the spreading box.

[0010] An automatic cocoon selection device according to the present invention, a further preferred technical solution thereof is: The cocoon separating partition includes: a fixing member, the upper end of which is fixedly connected to the spreading box, and the lower end of which abuts against the conveyor line; a fixed partition, the front end of which is a serrated structure, and the rear end of which is mounted on the fixing member; a movable cutting piece that fits with the fixed partition, the front end of the movable cutting piece being a serrated structure, and the rear end of which is movably connected in a chute of the fixing member; a driving device fixedly connected to the movable cutting piece for driving the movable cutting piece to move up and down.

[0011] An automatic cocoon selection device according to the present invention, a further preferred technical solution thereof is: The front end of the movable cutting piece does not exceed the front end of the fixed cutting piece, the driving device is a cylinder, and the spreading device further includes a vibration motor and a baffle, the vibration motor being fixedly arranged at the bottom of the spreading frame, and the baffle being slidably arranged at the spreading box outlet.

[0012] An automatic cocoon selection device according to the present invention, a further preferred technical solution thereof is: The sorting machine includes: a color sorter, the color sorter being arranged at the end of the conveyor line, and a defective product area and a cocoon container being connected to the outlet of the color sorter; a grading and screening device including a bracket, a sorting device and a receiving box, the outlet of the cocoon container being connected to the inlet of the sorting device, the sorting device being arranged on the bracket, and the receiving box being arranged at the outlet of the sorting device.

[0013] An automatic cocoon selection device according to the present invention, a further preferred technical solution thereof is: The sorting device includes: a sorting rod and a driving device, the sorting rod being connected to the outlet of the cocoon container, the driving device being connected to the sorting rod for driving the cocoon on the sorting rod to move, the sorting rod being composed of at least two rod bodies, and a gap being formed between adjacent rod bodies, and the gap gradually increasing along the moving direction of the cocoon.

[0014] An automatic cocoon selection device according to the present invention, a further preferred technical solution thereof is: The rod body is a frustum-shaped structure, the two ends of the rod body are rotatably arranged on the bracket, and the rod bodies rotate relative to each other; the bottom of the cocoon container is a funnel-shaped structure; the receiving box is divided into several receiving areas, and each receiving area is correspondingly arranged at the bottom of the sorting rod.

[0015] An automatic cocoon - selecting device according to the present invention, a further preferred technical solution thereof is: The driving device includes a motor, a driving gear and a driven gear. The driving gear and the driven gear are respectively installed at the ends of adjacent rods. The motor is arranged on a bracket, and the output shaft of the motor is fixedly connected to the driving gear, and the driving gear meshes with the driven gear.

[0016] Compared with the prior art, the technical solution of the present invention has the following advantages / beneficial effects:

[0017] The present invention is provided with a conveyor line, a cocoon - releasing device, a spreading device and a sorting machine. The cocoon - releasing device is arranged at the inlet end of the conveyor line. Through the cocoon - releasing device, the cocoon - releasing speed can be controlled to make the number of cocoons on the conveyor line as uniform as possible. The spreading device is used to separate the adhered cocoons and control the thickness of the cocoons on the conveyor line to meet the requirements. The sorting machine is used to screen the cocoons and classify the cocoons according to size. The operation of the present invention is simple, without the need for manual screening of cocoons, reducing the labor intensity of workers. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required in the embodiments. It should be understood that the following drawings only show some embodiments of the present invention, and thus should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0019] Figure 1 is a schematic structural diagram of an automatic cocoon - selecting device of the present invention.

[0020] Figure 2 is a schematic structural diagram of the cocoon - releasing device of the present invention.

[0021] Figure 3 is a schematic structural diagram of the rotating shaft and the rotating piece of the present invention.

[0022] Figure 4 is a schematic structural diagram of the outlet direction of the equal - sharing box of the present invention.

[0023] Figure 5 is a schematic structural diagram of the inlet direction of the equal - sharing box of the present invention.

[0024] Figure 6 is a schematic structural diagram of the cocoon - separating partition of the present invention.

[0025] Figure 7 is a schematic structural diagram of the grading and screening device of the present invention.

[0026] The labels in the figure are respectively: 1 frame, 2 frame inlet, 3 power device, 4 rotating shaft, 5 rotating piece, 6 bolt hole, 7 arc-shaped piece, 8 conveyor line; 10 equalizing box, 11 equalizing box inlet, 12 equalizing box outlet, 13 cocoon separating partition, 14 fixing piece, 15 fixed partition, 16 movable cutting piece, 17 sliding groove, 18 driving device, 19 vibration motor, 20 baffle; 21 defective product area, 22 cocoon holding box, 23 support, 24 rod body, 25 motor, 26 driving gear, 27 driven gear, 28 material receiving box, 29 color sorter; 30 cocoon discharging device, 31 spreading device. Detailed implementation manners

[0027] To make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Apparently, the described embodiments are only a part rather than all of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention. Therefore, the detailed description of the embodiments of the present invention provided below is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention.

[0028] It should be noted that similar reference numerals and letters denote similar items in the following figures. Therefore, once an item is defined in one figure, it may not be further defined and explained in subsequent figures.

[0029] Embodiment:

[0030] As Figure 1 shown, an automatic cocoon selection device includes: a conveyor line 8, a cocoon discharging device 30, a spreading device 31 and a sorting machine. The cocoon discharging device 30 is arranged at the inlet end of the conveyor line 8, the spreading device 31 is arranged on the conveyor line 8, and the sorting machine is arranged at the outlet end of the conveyor line 8.

[0031] As Figure 2 and Figure 3 shown, the cocoon discharging device includes: a frame 1, a frame inlet 2, a power device 3, a rotating shaft 4, a rotating piece 5, a bolt hole 6, an arc-shaped piece 7 and a conveyor line 8. The frame 1 is relatively airtight, and a frame inlet 2 and a frame outlet are arranged on the frame 1. The frame inlet 2 is arranged at the top of the frame 1 and has a funnel-shaped structure. The frame outlet is located on one side of the outlet. The conveyor line 8 is located below the inlet and conveys in the direction of the frame outlet.

[0032] A rotating frame is arranged inside the frame 1. The rotating frame includes a power device 3, a rotating shaft 4, and a rotating blade 5. The power device 3 is a motor, which is installed on the outer side wall of the frame 1. The output shaft of the power device 3 is connected to the axis of the rotating shaft 4 to drive the rotating shaft 4 to rotate. The rotating shaft 4 is horizontally arranged inside the frame 1 and is located on the passage formed by the inlet 2 and the outlet of the frame. The rotating blade 5 is square, evenly arranged along the circumference of the rotating shaft 4, and is perpendicular to the tangent of the rotating shaft 4. A receiving groove is formed between adjacent rotating blades 5 to receive the cocoons entering from the inlet 2 of the frame, and then rotates with the rotating shaft 4 and is poured onto the conveyor line 8. It should be noted that both ends of the rotating blade 5 abut against the inner wall of the frame 1 to prevent the cocoons in the upper receiving groove from leaking into the lower receiving groove.

[0033] More preferably, in order to facilitate the replacement of the rotating blade 5 and be able to adjust the number and spacing of the rotating blades 5 according to the actual situation. A number of bolt holes 6 are provided at both ends of the rotating shaft 4. The bolt holes 6 are evenly distributed along the circumference of the rotating shaft 4. An arc-shaped member 7 is fixedly arranged under the rotating blade 5. The radian of the arc-shaped member 7 is adapted to the radian of the rotating shaft 4. Bolt holes 6 are also provided on the arc-shaped member 7. The arc-shaped member 7 is bolted to the rotating shaft 4.

[0034] As Figures 4 to 6 shown, the spreading device includes: an even distribution box 10, an even distribution box inlet 11, an even distribution box outlet 12, a cocoon separating partition 13, a fixing member 14, a fixed partition 15, a movable cutting blade 16, a sliding groove 17, a driving device 18, a vibration motor 19, and a baffle 20.

[0035] The even distribution box 10 is arranged on the conveyor line 8 to spread the cocoons passing through the conveyor box. The front and rear ends of the even distribution box 10 are penetrated and opened. The front end is the even distribution box inlet 11, and the rear end is the even distribution box outlet 12. Inside the even distribution box 10, a cocoon separating component is arranged.

[0036] The cocoon separating component is composed of a number of cocoon separating partitions 13. The cocoon separating partitions 13 are evenly arranged in the even distribution box 10. Specifically, the cocoon separating partition 13 includes: a fixing member 14, a fixed partition 15, and a movable cutting blade 16.

[0037] The upper end of the fixing member 14 is fixedly connected to the even distribution box 10, and the lower end abuts against the conveyor line 8. A sliding groove 17 is arranged at one end of the fixing member 14 close to the outlet of the spreading box for installing the movable cutting blade 16.

[0038] One end of the fixed partition 15 facing the even distribution box inlet 11 is provided with a circular arc-shaped sawtooth. The circular arc-shaped sawtooth will not pierce the cocoons, but can hook the cocoons stuck together. One end of the fixed partition 15 close to the even distribution box outlet 12 is installed on the fixing member 14.

[0039] One end of the movable cutting piece 16 close to the outlet 12 of the equalizing box is connected to the sliding groove 17 of the fixing piece 14, so that the movable cutting piece 16 can be attached to the fixed cutting piece and slide relatively. More preferably, the front end of the movable cutting piece 16 does not exceed the fixed partition 15 to prevent puncturing the cocoon. One end of the movable cutting piece 16 close to the inlet 11 of the equalizing box is a triangular sawtooth for cutting the silk hooked by the fixed partition 15. The movable cutting piece 16 can be a ceramic blade. A driving device 18 is installed on the top of the equalizing box 10. The driving device 18 is a cylinder, and the piston rod of the cylinder is fixedly connected to the movable cutting piece 16 for driving the movable cutting piece 16 to move up and down.

[0040] At the outlet 12 of the equalizing box, a baffle 20 that can move up and down is provided. The height limit of the outlet 12 of the equalizing box is controlled by the baffle 20, so as to control the thickness of the cocoon. A vibration motor 19 is provided at the bottom of the equalizing box 10 to make the cocoon transported to the equalizing box 10 spread more evenly.

[0041] As Figure 1 and Figure 7 As shown, the sorting machine includes: a defective product area 21, a cocoon box 22, a bracket 23, a rod body 24, a motor 25, a driving gear 26, a driven gear 27, a receiving box 28, and a color sorter 29.

[0042] A color sorter 29 is provided at the end of the conveyor line 8. The color sorter 29 in the present invention is an existing device, for example, it can be a Zhongrui Microvision cocoon color sorter. After the cocoon enters the color sorter 29, the color sorter 29 screens the cocoon. A defective product area 21 and a cocoon box 22 are provided at the outlet of the color sorter 29. The defective cocoons screened out by the color sorter 29 enter the defective product area 21, and the rest enter the cocoon box 22. The defective product area 21 is a square box, and the upper inlet of the cocoon box 22 is a square structure, and the lower outlet is a funnel-shaped structure, which is convenient for reducing the flow rate of the cocoon flowing out of the cocoon box 22 and can align the outlet of the cocoon box 22 with the grading and screening device.

[0043] The grading and screening device includes: a bracket 23, a receiving box 28, and a sorting device. The sorting device is arranged on the bracket 23. The outlet of the cocoon box 22 is connected to the inlet of the sorting device, and the receiving box 28 is connected to the outlet of the sorting device. The inside of the receiving box 28 is divided into several receiving areas for receiving cocoons of different sizes.

[0044] Specifically, the sorting device includes a sorting rod and a driving device. The sorting rod is composed of at least two rod bodies 24. The two ends of the rod body 24 are rotatably connected to the bracket 23. The rod body 24 is in a frustum shape or a conical shape, that is, the side walls of the rod body 24 can eventually converge to a point. A gap is formed between adjacent rod bodies 24, and the gap gradually increases. The outlet of the cocoon box 22 is aligned with the end with a smaller gap, and the receiving box 28 is arranged below the gap.

[0045] The driving device is connected to the rod body 24 and is used to drive the rod body 24 to rotate. The driving device includes: a motor 25, a driving gear 26, and a driven gear 27. The driving gear 26 and the driven gear 27 are respectively installed at the ends of adjacent two rod bodies 24, and the driving gear 26 meshes with the driven gear 27. The motor 25 is installed on the bracket 23, and the output shaft of the motor 25 is fixedly connected to the driving gear 26. When the motor 25 rotates, it drives the driving gear 26 to rotate, thereby driving the driven gear 27 to rotate, so that adjacent two rod bodies 24 rotate relative to each other, and then a forward force is given to the cocoons in the gap.

[0046] During use, first bolt the rotating piece 5 to the rotating shaft 4, then start the power device 3 and the conveyor line 8 to make the rotating shaft 4 rotate. Then feed the cocoons through the inlet 2 of the frame. The cocoons fall into the receiving groove, and then rotate along with the rotating shaft 4 towards the outlet of the frame. When rotating to a certain angle, the cocoons fall onto the conveyor line 8 under the action of gravity. Because there is a certain time difference when the cocoons in the receiving groove fall, they can be evenly spread on the conveyor line 8.

[0047] When the rotating piece 5 needs to be replaced, first loosen the bolts, and then remove the rotating piece 5. During installation, adjust the arc-shaped piece 7 of the rotating piece 5 to the direction consistent with the radian of the rotating shaft 4, and then bolt it to the rotating shaft 4.

[0048] The cocoons are transported by the conveyor line 8 to the entrance 11 of the equalizing box. Then, under the action of the vibration motor 19 and the conveyor line 8, the non-bonded cocoons pass through the gaps between the cocoon separating partitions 13, while the bonded cocoons cannot pass through and will get stuck on the cocoon separating partitions 13. The fixed partition 15 hooks the silk bonded between the cocoons. The movable cutting piece 16 is driven by a cylinder to move on the fixed partition 15 to cut the bonded silk. After being cut, the non-bonded cocoons continue to pass through the gaps formed by the cocoon separating partitions 13, and then pass through the outlet 12 of the equalizing box according to the thickness of a single layer.

[0049] The cocoons exiting through the equalizing box are transported by the conveyor line 8 to the color sorter 29, where the color sorter 29 screens the cocoons. The cocoons with colors enter the defective product area 21, and the colorless cocoons enter the cocoon storage box 22. Under the action of gravity, the cocoons pass through the bottom outlet of the cocoon storage box 22 and fall into the gaps formed by the rod bodies 24. The rod bodies 24 are driven by the motor 25 to rotate, causing the cocoons to move forward. Since the gaps gradually increase, when the cocoons move to a position where the gap is larger than the cocoons, the cocoons fall out of the gaps and land in the lower receiving box 28.

[0050] Because the sizes of the individual cocoons are not the same, the positions where the cocoons fall out of the gaps are also different, thus realizing the classification and screening of the cocoons. The receiving areas arranged from the back to the front in the receiving box 28 correspond to cocoons of different sizes. For abnormally sized cocoons, such as flat cocoons (the cocoons have been significantly flattened) and thin - skinned cocoons (the cocoon layer is very thin and soft, about half the thickness of a normal cocoon), these two types of cocoons are smaller compared to normal cocoons and will fall into the rear receiving areas. Therefore, the present invention can not only classify cocoons by size but also screen out deformed cocoons to a certain extent.

[0051] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. are based on the orientation or positional relationships shown in the drawings. These are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of the present invention.

[0052] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected to", "fixed", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above - mentioned terms in the present invention can be understood according to specific circumstances.

[0053] In the present invention, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include direct contact between the first and second features, or may include contact between the first and second features through additional features therebetween rather than direct contact. Moreover, the first feature being "above", "over" and "on top of" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "beneath" and "underneath" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the horizontal height of the first feature is lower than that of the second feature.

[0054] The above are only the preferred embodiments of the present invention. It should be noted that the above preferred embodiments should not be construed as limiting the present invention, and the protection scope of the present invention should be subject to the scope defined by the claims. For those of ordinary skill in the art, without departing from the spirit and scope of the present invention, several improvements and modifications can also be made, and these improvements and modifications should also be regarded as within the protection scope of the present invention.

Claims

1. An automatic cocoon selection device, comprising a conveyor line, a cocoon discharging device, a spreading device and a sorting machine. The cocoon discharging device is arranged at the inlet end of the conveyor line, the spreading device is arranged on the conveyor line, and the sorting machine is arranged at the outlet end of the conveyor line; It is characterized in that the cocoon discharging device includes: a frame with a frame inlet at the top and a frame outlet on the frame on one side of the frame inlet. The conveyor line is arranged below the frame inlet and extends towards the frame outlet; a rotating frame arranged inside the frame, and the rotating frame includes: a power device, a rotating shaft connected to the power device, and rotating blades arranged circumferentially along the rotating shaft; At both ends of the rotating shaft, a number of bolt holes are arranged circumferentially. The rotating blade is bolted to the rotating shaft. An arc-shaped member is arranged at the bottom of the rotating blade, and the radian of the arc-shaped member is the same as that of the rotating shaft. The rotating blade is bolted to the rotating shaft through the arc-shaped member; the power device is a motor, and the output shaft of the motor is fixedly connected to the axis of the rotating shaft; the spreading device includes: a spreading box arranged on the conveyor line. The front and rear ends of the spreading box are open, the front end is the spreading box inlet, and the rear end is the spreading box outlet for controlling the thickness; a cocoon separating component composed of a number of cocoon separating partitions, and the cocoon separating partitions are arranged in the spreading box at equal intervals; The cocoon separating partition includes: a fixing member with the upper end fixedly connected to the spreading box and the lower end abutted against the conveyor line; a fixed partition with a serrated structure at the front end and installed on the fixing member at the rear end; a movable cutting blade attached to the fixed partition, with a serrated structure at the front end of the movable cutting blade and movably connected to the chute of the fixing member at the rear end; a first driving device fixedly connected to the movable cutting blade for driving the movable cutting blade to move up and down.

2. An automatic cocoon selection device according to claim 1, It is characterized in that the front end of the movable cutting blade does not exceed the front end of the fixed cutting blade. The first driving device is a cylinder. The spreading device further includes a vibration motor and a baffle. The vibration motor is fixedly arranged at the bottom of the spreading frame, and the baffle is slidably arranged at the outlet of the spreading box.

3. An automatic cocoon selection device according to claim 2, It is characterized in that the sorting machine includes: a color sorter arranged at the end of the conveyor line, and a defective product area and a cocoon container are connected to the outlet of the color sorter; a grading and screening device, including a bracket, a sorting device and a receiving box. The outlet of the cocoon container is connected to the inlet of the sorting device. The sorting device is arranged on the bracket, and the receiving box is arranged at the outlet of the sorting device.

4. An automatic cocoon selection device according to claim 3, It is characterized in that the sorting device includes: a sorting rod and a second driving device. The sorting rod is connected to the outlet of the cocoon container, and the second driving device is connected to the sorting rod for driving the movement of the cocoons on the sorting rod. The sorting rod is composed of at least two rod bodies, and a gap is formed between adjacent rod bodies, and the gap gradually increases along the moving direction of the cocoons.

5. An automatic cocoon selection device according to claim 4, It is characterized in that The rod body has a frustum-shaped structure, and both ends of the rod body are rotatably arranged on the bracket, and the rod bodies rotate relative to each other; the bottom of the cocoon container has a funnel-shaped structure; the material receiving box is divided into several material receiving areas, and each material receiving area is correspondingly arranged at the bottom of the sorting rod.

6. An automatic cocoon sorting device according to claim 5, characterized in that the second driving device includes a motor, a driving gear and a driven gear, the driving gear and the driven gear are respectively installed at the ends of adjacent rod bodies, the motor is arranged on the bracket, the output shaft of the motor is fixedly connected to the driving gear, and the driving gear meshes with the driven gear.

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