Insect trapping device

Abstract

The utility model relates to the technical field of insect prevention and control, in particular to an insect trapping device. The insect trapping device comprises a trap body, a water storage tank, a scraping plate, a cleaning assembly, a collecting box, a gravity block and a knocking assembly, electric net plates are symmetrically installed in the trap body, trapping lamps are symmetrically installed at the positions, close to the lower portions of the electric net plates, in the trap body, and the water storage tank is installed at the bottom of the trap body. According to the insect trapping device, through the design of the cleaning assembly, insect bodies in the water storage tank can be automatically scraped to the two ends and pushed into the collecting box; the workload of manual cleaning is reduced, a large amount of manpower and time cost is saved, meanwhile, contact between operators and insects with germs or harmful substances is reduced, and the health risk is reduced; the insect bodies in the water storage tank are cleaned in time, so that the insects are prevented from being accumulated in the trap, the continuous and efficient trapping and killing effect of the device is guaranteed, and the adverse effect on the dragon fruit planting environment is reduced.

Description

Technical Field

[0001] This utility model relates to the field of insect control technology, and in particular to an insect trapping device. Background Technology

[0002] Supplemental lighting is an important measure to increase yield and improve quality in dragon fruit cultivation. By extending the duration of light exposure at night using artificial light, the growth and development of dragon fruit can be effectively promoted, increasing fruit yield and quality. However, artificial light attracts a large number of flying insects, which directly damage the dragon fruit plants and fruits. These insects gnaw on the leaves and stems, disrupting the plant's photosynthetic system and nutrient transport channels, affecting normal plant growth. Biting the fruit causes wounds on the fruit surface, reducing its commercial value and making it more susceptible to bacterial infection, leading to fruit rot and spoilage, resulting in serious economic losses for growers.

[0003] Currently available insect traps on the market have significant shortcomings. Firstly, their structures are relatively simple, generally relying solely on simple attractants or lights to lure insects, lacking effective escape prevention designs. This results in insects entering the traps still surviving and escaping, failing to achieve efficient killing and failing to meet the actual needs of insect control in dragon fruit cultivation. Secondly, insects killed by the traps mostly rely on manual removal. This not only consumes a lot of manpower and time, but also poses certain health risks to operators who may come into contact with insects carrying germs or harmful substances during the removal process. Furthermore, untimely manual removal can lead to insect accumulation inside the traps, affecting the killing effect and further negatively impacting the dragon fruit growing environment.

[0004] Therefore, it is necessary to provide a new insect trapping device to solve the above-mentioned technical problems. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides an insect trapping device.

[0006] The insect trapping device provided by this utility model includes: a trap body, a water tank, a scraper, a cleaning component, a collection box, a gravity block, and a striking component. A grid plate is symmetrically installed inside the trap body. Trapping lights are symmetrically installed below the grid plate inside the trap body. A water tank is installed at the bottom of the trap body. A sliding scraper is installed inside the water tank, with its lower edge abutting the bottom surface of the water tank and its two sides abutting two corresponding sides of the water tank. Equidistant clearance grooves are provided on the scraper. A cleaning component is installed between the trap body and the water tank. The cleaning component drives the scraper to move and scrape away insect carcasses inside the water tank. A collection box for collecting the insect carcasses scraped away by the scraper is installed at the bottom of the trap body, located below the water tank. Gravity blocks are symmetrically installed inside the trap body. A striking component is installed between the trap body and the gravity blocks. The striking component drives the gravity blocks to move and knock off the insect carcasses adhering to the grid plate.

[0007] Preferably, the cleaning assembly includes: a motor, a reciprocating lead screw, a slider, and a limiting rod. The motor is fixedly connected inside the trap body, and the output end of the motor is fixedly connected to the reciprocating lead screw. The other end of the reciprocating lead screw is rotatably connected to the inner wall of the trap body. A slider is fitted in the middle of the reciprocating lead screw, and a limiting hole is opened at the bottom of the slider along the extension direction of the reciprocating lead screw. A limiting rod corresponding to the reciprocating lead screw is fixedly connected inside the trap body, and the outer wall of the limiting rod is slidably connected to the inner wall of the limiting hole.

[0008] Preferably, a sleeve is fixedly connected to one side of the slider via a connecting rod, a spring is fixedly connected to the inner wall of the sleeve, one end of the spring is connected to the top of the sleeve, and the other end is fixedly connected to a sliding rod. The outer wall of the sliding rod is slidably connected to the inner wall of the sleeve, and the end of the sliding rod away from the spring is fixedly connected to a scraper. Top rods are fixedly connected to both sides of the scraper.

[0009] Preferably, the striking assembly includes: an active pulley, a driven pulley, and a diamond-shaped block. The top of the reciprocating screw is fixedly connected to the active pulley. The inner wall of the trap body is symmetrically connected to a rotating rod near the upper part of the reciprocating screw. The middle part of the rotating rod is fixedly connected to the driven pulley, and the other end of the rotating rod is fixedly connected to the diamond-shaped block.

[0010] Preferably, a crossbar is fixedly connected to one side of each gravity block, and a groove is provided in the body of the trap near the corresponding crossbar. The crossbar is slidably connected to the inner wall of the corresponding groove, and the other end of the crossbar extends out of the groove and connects with at least one vertex of the rhombus block.

[0011] Preferably, thin lines are fixedly connected at equal intervals between the tops of the two side walls of the water storage tank that do not abut against the scraper, and the thin lines correspond to the clearance grooves that are opened at equal intervals on the scraper.

[0012] Preferably, the trap body has a rotating plate symmetrically connected inside, and the rotating plate is respectively arranged on both sides of the water storage tank corresponding to the scraper.

[0013] Preferably, the outer diameter of the driven pulley is larger than the outer diameter of the driving pulley.

[0014] Compared with related technologies, the insect trapping device provided by this utility model has the following beneficial effects:

[0015] Once insects enter the trap, most are electrocuted by the electrified grid, while a small number that are not electrocuted fall into the water tank and drown, ensuring efficient insect killing and meeting the actual needs of insect control in dragon fruit cultivation. The top of the water tank is equipped with fine lines at equal intervals, and the sides are designed with slopes to effectively prevent insects that are not electrocuted from escaping, greatly improving insect killing efficiency and reducing damage to dragon fruit plants and fruits.

[0016] The cleaning components are designed to automatically scrape the dead insects in the water tank to both ends and push them into the collection box. This reduces the amount of manual cleaning work, saving a lot of manpower and time costs. At the same time, it reduces the contact between operators and insects carrying germs or harmful substances, thus reducing health risks. Timely cleaning of dead insects in the water tank prevents insects from accumulating in the trap, ensuring the continuous and efficient killing effect of the device and reducing adverse effects on the dragon fruit growing environment.

[0017] By using a striking component, a gravity block is driven to strike the electric grid plate, causing the insect carcasses stuck to the surface of the grid plate to fall into a water storage tank, and then pushed into a collection box by a scraper. This automatic cleaning method can remove insect carcasses from the electric grid plate in a timely manner, preventing the accumulation of insect carcasses from affecting the trapping effect of the electric grid plate, and improving the service life and working efficiency of the device. Attached Figure Description

[0018] Figure 1 A schematic diagram of the insect trapping device provided by this utility model;

[0019] Figure 2 for Figure 1 The diagram shows a cross-sectional view of the trap body.

[0020] Figure 3 for Figure 2 The diagram shows the structure of the power grid board.

[0021] Figure 4 for Figure 3 The diagram shows the structure at point A.

[0022] Figure 5 for Figure 2 The diagram shows the structure of the water storage tank.

[0023] Figure 6 for Figure 5 The diagram shows the structure at point B.

[0024] The following are the labels in the diagram: 1. Trapper body; 2. Electric grid plate; 3. Trapping light; 4. Water tank; 5. Scraper; 6. Collection box; 7. Gravity block; 8. Motor; 9. Reciprocating screw; 10. Slider; 11. Limiting rod; 12. Sleeve; 13. Spring; 14. Sliding rod; 15. Top rod; 16. Driving pulley; 17. Driven pulley; 18. Rhombus block; 19. Rotating plate. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0026] The specific implementation of this utility model will be described in detail below with reference to specific embodiments.

[0027] Please see Figures 1 to 6An insect trapping device includes: a trap body 1, a water tank 4, a scraper 5, a cleaning component, a collection box 6, a gravity block 7, and a striking component. An electric grid plate 2 is symmetrically installed inside the trap body 1. Trapping lights 3 are symmetrically installed inside the trap body 1 near the lower part of the electric grid plate 2. A water tank 4 is installed at the bottom of the trap body 1. A sliding scraper 5 is installed inside the water tank 4. The lower edge of the scraper 5 abuts against the bottom surface of the water tank 4, and its two sides abut against the water tank 4. On two corresponding sides, the scraper 5 has equally spaced clearance grooves. A cleaning component is installed between the trap body 1 and the water tank 4. The cleaning component drives the scraper 5 to move and scrape off the insect corpses inside the water tank 4. A collection box 6 is installed at the bottom of the trap body 1 to collect the insect corpses scraped off by the scraper 5. The collection box 6 is located below the water tank 4. Gravity blocks 7 are symmetrically installed inside the trap body 1. A striking component is installed between the trap body 1 and the gravity blocks 7. The striking component drives the gravity blocks. 7. The moving part knocks off the insect carcasses adhering to the electric grid plate 2. The cleaning components include: a motor 8, a reciprocating screw 9, a slider 10, and a limiting rod 11. The motor 8 is fixedly connected inside the trap body 1. The output end of the motor 8 is fixedly connected to the reciprocating screw 9. The other end of the reciprocating screw 9 is rotatably connected to the inner wall of the trap body 1. The slider 10 is installed in the middle of the reciprocating screw 9. The bottom of the slider 10 has a limiting hole along the extension direction of the reciprocating screw 9. The internal part of the trap body 1 is fixedly connected to the motor 8. A limiting rod 11 corresponding to the reciprocating lead screw 9 is connected. The outer wall of the limiting rod 11 is slidably connected to the inner wall of the limiting hole. A sleeve 12 is fixedly connected to one side of the slider 10 through a connecting rod. A spring 13 is fixedly connected to the inner wall of the sleeve 12. One end of the spring 13 is connected to the top of the sleeve 12, and the other end is fixedly connected to a sliding rod 14. The outer wall of the sliding rod 14 is slidably connected to the inner wall of the sleeve 12. The end of the sliding rod 14 away from the spring 13 is fixedly connected to the scraper 5. Top rods 15 are fixedly connected to both sides of the scraper 5.

[0028] It should be noted that: the scraper 5 is equipped with rollers at the bottom. When the slider 10 moves the scraper 5, the rollers at the bottom can reduce the friction with the inner wall of the water storage tank 4. When it is necessary to clean the insect corpses in the water storage tank 4, the control system will start the motor 8 fixed inside the trap body 1. The output end of the motor 8 is fixedly connected to the reciprocating screw 9. After the motor 8 starts, it drives the reciprocating screw 9 to rotate. The slider 10 is installed in the middle of the reciprocating screw 9. In order to ensure the smooth movement of the slider 10, a limiting hole is opened at the bottom of the slider 10. A limiting rod 11 is fixed inside the trap body 1. The outer wall of the limiting rod 11 is slidably connected to the inner wall of the limiting hole of the slider 10.

[0029] One side of the slider 10 is fixedly connected to the sleeve 12 via a connecting rod. A spring 13 is fixedly connected to the inner wall of the sleeve 12. The other end of the spring 13 is fixed to the sliding rod 14, and the bottom of the sliding rod 14 is fixed to the scraper 5. Therefore, the scraper 5 moves with the slider 10, scraping the insect corpses in the water storage tank 4 to both ends. Both ends of the water storage tank 4 are designed with slopes. When the scraper 5 pushes the insect corpses to the slope position at one end of the water storage tank 4, the slope squeezes the scraper 5, causing the scraper 5 to drive the sliding rod 14 to slide upward in the sleeve 12 and compress the spring 13. The equidistant clearance grooves inside the scraper 5 are aligned with the equidistant thin lines fixedly connected to the top of the water storage tank 4. Therefore, when the scraper 5 moves on the slope at one end of the water tank 4, it can effectively avoid the scraper 5 from hitting the thin line. As the slider 10 continues to move, the top rod 15 on one side of the scraper 5 contacts and pushes open the rotating plate 19 rotatably connected inside the trap body 1. The insect carcass enters the collection box 6 installed at the bottom of the trap body 1 through the channel formed by the opening of the rotating plate 19. Then, the slider 10 moves in the opposite direction under the rotation of the reciprocating screw 9. During the process of leaving the slope at one end of the water tank 4, the spring 13 releases its elastic force and pushes the slide plate to slide inside the sleeve 12, so that the scraper 5 moves downward at the same time and always contacts the bottom of the water tank 4.

[0030] Please see Figure 3 , Figure 5 and Figure 6 The striking assembly includes: a driving pulley 16, a driven pulley 17, and a rhombus block 18. The top of the reciprocating screw 9 is fixedly connected to the driving pulley 16. A rotating rod is symmetrically and rotatably connected to the inner wall of the trap body 1 near the top of the reciprocating screw 9. A driven pulley 17 is fixedly connected to the middle of each rotating rod, and a rhombus block 18 is fixedly connected to the other end of each rotating rod. A crossbar is fixedly connected to one side of each gravity block 7. A sliding groove is provided inside the trap body 1 near the corresponding crossbar position. The crossbar and the corresponding... The inner wall of the chute is slidably connected, and the other end of the crossbar extends out of the chute and connects with at least one vertex of the rhombus block 18. Fine lines are fixedly connected at equal intervals between the top of the two side walls of the water tank 4 that do not abut against the scraper 5. The fine lines correspond to the clearance grooves opened at equal intervals on the scraper 5. A rotating plate 19 is symmetrically rotatably connected inside the trap body 1. The rotating plate 19 is respectively set on both sides of the water tank 4 corresponding to the scraper 5. The outer diameter of the driven pulley 17 is larger than the outer diameter of the driving pulley 16.

[0031] It should be noted that the outer diameter of the driven pulley is larger than that of the driving pulley, which can reduce speed. When the reciprocating screw 9 rotates and drives the slider 10 and scraper 5 to clean the insect corpses in the water tank 4, the driving pulley 16, which is fixedly connected to the top of the reciprocating screw 9, rotates accordingly. The driving pulley 16 drives the driven pulley 17 to rotate through the belt. The driven pulley 17 is fixed to the middle of the rotating rod rotatably connected to the inner wall of the trap body 1. The other end of the rotating rod is fixedly connected to the rhombus block 18, which rotates with the rotating rod.

[0032] Gravity blocks 7 are symmetrically installed inside the trap body 1 above the intersection of two electric grid plates 2. A crossbar is fixedly connected to one side of the gravity block 7. A groove is opened at the corresponding position on the inner wall of the trap body 1, and the crossbar is slidably connected to the inner wall of the groove. The other end of the crossbar is located on one side of the rhombus block 18. When the rhombus block 18 rotates, it pushes the crossbar to slide upward in the groove, and the gravity block 7 moves upward accordingly. When one end of the rhombus block 18 is separated from the crossbar, the gravity block 7 falls under the action of gravity and hits the electric grid plate 2, causing the insect corpses stuck to the surface of the electric grid plate 2 to fall into the water storage tank 4. Subsequently, they are pushed into the collection box 6 by the scraper 5. The operator regularly disposes of the insect corpses in the collection box 6. After disposal, the collection box 6 is put back into its original position at the bottom of the trap body 1 to carry out subsequent insect trapping and collection work.

[0033] The working principle of the insect trapping device provided by this utility model is as follows:

[0034] The trap body 1 serves as the main structure of the entire device, with supporting feet at its bottom. The trap body 1 is placed and fixed on the ground near the dragon fruit plant using the supporting feet. Inside the trap body 1, there is an electric grid plate 2 and a trapping light 3, with the electric grid plate 2 symmetrically distributed inside the trap body 1. The trapping light 3 is symmetrically installed below the electric grid plate 2. A sugar-vinegar solution is placed inside the trap body 1 as a trapping agent, and then the power is turned on to power the trapping light 3 and the electric grid plate 2, completing the preparation work before trapping.

[0035] The light emitted by the trapping lamp 3 and the scent emitted by the sweet and sour liquid attract insects such as the beet armyworm, causing them to enter through the inlet at the top of the trap body 1, which is wider at the outside and narrower at the inside. The design of the inlet makes it difficult for the insects to escape once inside. Most of the insects that enter the trap body 1 will come into contact with the symmetrically arranged and electrified electric grid plates 2, and will be electrocuted by the grid plates 2. Due to gravity, they will fall into the water storage tank 4 at the bottom of the trap body 1. Some insects that are not electrocuted by the grid plates 2 will also fall into the water storage tank 4 at the bottom of the trap body 1. The water storage tank 4 is filled with water, and the insects that are not electrocuted will drown in the water in the water storage tank 4. The top of the water storage tank 4 is equidistantly equipped with thin lines, and the sides are designed with slopes to effectively prevent insects that are not electrocuted by the grid plates 2 from escaping.

[0036] After a period of trapping, when it is necessary to clean the insect corpses in the water storage tank 4, the control system will start the motor 8 fixed inside the trap body 1; the output end of the motor 8 is fixedly connected to the reciprocating screw 9, and after the motor 8 starts, it drives the reciprocating screw 9 to rotate; the slider 10 is installed in the middle of the reciprocating screw 9. In order to ensure the smooth movement of the slider 10, a limiting hole is opened at the bottom of the slider 10, and a limiting rod 11 is fixed inside the trap body 1. The outer wall of the limiting rod 11 is slidably connected to the inner wall of the limiting hole of the slider 10.

[0037] One side of the slider 10 is fixedly connected to the sleeve 12 via a connecting rod. A spring 13 is fixedly connected to the inner wall of the sleeve 12. The other end of the spring 13 is fixed to the sliding rod 14, and the bottom of the sliding rod 14 is fixed to the scraper 5. Therefore, the scraper 5 moves with the slider 10, scraping the insect corpses in the water storage tank 4 to both ends. Both ends of the water storage tank 4 are designed with slopes. When the scraper 5 pushes the insect corpses to the slope position at one end of the water storage tank 4, the slope squeezes the scraper 5, causing the scraper 5 to drive the sliding rod 14 to slide upward in the sleeve 12 and compress the spring 13. The equidistant clearance grooves inside the scraper 5 are aligned with the equidistant thin lines fixedly connected to the top of the water storage tank 4. Therefore, when the scraper 5 moves on the slope at one end of the water tank 4, it can effectively avoid the scraper 5 from hitting the thin line. As the slider 10 continues to move, the top rod 15 on one side of the scraper 5 contacts and pushes open the rotating plate 19 rotatably connected inside the trap body 1. The insect carcass enters the collection box 6 installed at the bottom of the trap body 1 through the channel formed by the opening of the rotating plate 19. Then, the slider 10 moves in the opposite direction under the rotation of the reciprocating screw 9. During the process of leaving the slope at one end of the water tank 4, the spring 13 releases the elastic force and pushes the slide plate to slide inside the sleeve 12, so that the scraper 5 moves downward at the same time and always contacts the bottom of the water tank 4.

[0038] When the reciprocating screw 9 rotates, driving the slider 10 and scraper 5 to clean the insect corpses in the water storage tank 4, the active pulley 16 fixedly connected to the top of the reciprocating screw 9 rotates accordingly; the active pulley 16 drives the driven pulley 17 to rotate through the belt, the driven pulley 17 is fixed to the middle of the rotating rod rotatably connected to the inner wall of the trap body 1, and the other end of the rotating rod is fixedly connected to the rhombus block 18, which rotates with the rotating rod;

[0039] Gravity blocks 7 are symmetrically installed inside the trap body 1 above the intersection of two electric grid plates 2. A crossbar is fixedly connected to one side of the gravity block 7. A groove is opened at the corresponding position on the inner wall of the trap body 1, and the crossbar is slidably connected to the inner wall of the groove. The other end of the crossbar is located on one side of the rhombus block 18. When the rhombus block 18 rotates, it pushes the crossbar to slide upward in the groove, and the gravity block 7 moves upward accordingly. When one end of the rhombus block 18 is separated from the crossbar, the gravity block 7 falls under the action of gravity and hits the electric grid plate 2, causing the insect corpses stuck to the surface of the electric grid plate 2 to fall into the water storage tank 4. Subsequently, they are pushed into the collection box 6 by the scraper 5. The operator regularly disposes of the insect corpses in the collection box 6. After disposal, the collection box 6 is put back into its original position at the bottom of the trap body 1 to carry out subsequent insect trapping and collection work.

[0040] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. An insect trapping device, characterized in that, include: The trap body (1) has an electric grid plate (2) symmetrically installed inside the trap body (1) and trap lights (3) symmetrically installed inside the trap body (1) near the bottom of the electric grid plate (2). Water storage tank (4) is installed at the bottom of the trap body (1); Scraper (5): A slidable scraper (5) is installed inside the water storage tank (4). The lower edge of the scraper (5) abuts against the bottom surface of the water storage tank (4), and the two sides abut against the two corresponding sides of the water storage tank (4). The scraper (5) is provided with clearance grooves at equal intervals. A cleaning component is installed between the trap body (1) and the water tank (4). The cleaning component drives the scraper (5) to move and scrape off the insect corpses inside the water tank (4). Collection box (6): The bottom of the trap body (1) is equipped with a collection box (6) for collecting the insect corpses scraped off by the scraper (5). The collection box is located below the water tank (4). Gravity blocks (7) are symmetrically installed inside the trap body (1); A striking component is installed between the trap body (1) and the gravity block (7). The striking component drives the gravity block (7) to move and knock off the insect corpses attached to the electric grid plate (2).

2. The insect trapping device according to claim 1, characterized in that, The cleaning components include: a motor (8), a reciprocating lead screw (9), a slider (10), and a limiting rod (11). The motor (8) is fixedly connected inside the trap body (1). The output end of the motor (8) is fixedly connected to the reciprocating lead screw (9). The other end of the reciprocating lead screw (9) is rotatably connected to the inner wall of the trap body (1). The slider (10) is installed in the middle of the reciprocating lead screw (9). A limiting hole is opened at the bottom of the slider (10) along the extension direction of the reciprocating lead screw (9). The limiting rod (11) corresponding to the reciprocating lead screw (9) is fixedly connected inside the trap body (1). The outer wall of the limiting rod (11) is slidably connected to the inner wall of the limiting hole.

3. The insect trapping device according to claim 2, characterized in that, A sleeve (12) is fixedly connected to one side of the slider (10) via a connecting rod. A spring (13) is fixedly connected to the inner wall of the sleeve (12). One end of the spring (13) is connected to the top of the sleeve (12), and the other end is fixedly connected to a sliding rod (14). The outer wall of the sliding rod (14) is slidably connected to the inner wall of the sleeve (12). The end of the sliding rod (14) away from the spring (13) is fixedly connected to the scraper (5). Top rods (15) are fixedly connected to both sides of the scraper (5).

4. The insect trapping device according to claim 1, characterized in that, The striking assembly includes: a driving pulley (16), a driven pulley (17), and a diamond block (18). The top of the reciprocating screw (9) is fixedly connected to the driving pulley (16). The inner wall of the trap body (1) is symmetrically connected to a rotating rod near the top of the reciprocating screw (9). The middle of the rotating rod is fixedly connected to the driven pulley (17), and the other end of the rotating rod is fixedly connected to the diamond block (18).

5. The insect trapping device according to claim 4, characterized in that, A horizontal bar is fixedly connected to one side of each gravity block (7). A groove is provided in the body of the trap (1) near the corresponding horizontal bar. The horizontal bar is slidably connected to the inner wall of the corresponding groove. The other end of the horizontal bar extends out of the groove and connects with at least one vertex of the rhombus block (18).

6. The insect trapping device according to claim 1, characterized in that, Fine lines are fixedly connected at equal intervals between the top of the two side walls of the water storage tank (4) that do not abut against the scraper (5), and the fine lines correspond to the clearance grooves opened at equal intervals on the scraper (5).

7. The insect trapping device according to claim 1, characterized in that, The trap body (1) is symmetrically connected to a rotating plate (19) inside, and the rotating plate (19) is respectively arranged on both sides of the water storage tank (4) corresponding to the scraper (5).

8. The insect trapping device according to claim 4, characterized in that, The outer diameter of the driven pulley (17) is larger than the outer diameter of the driving pulley (16).

Images