A sieving feed device

Abstract

This invention belongs to the technical field of feeding devices and discloses a sieving feeding device, including a main body with a feeding port at the top and a discharge port on one side of the bottom. The main body is equipped with a sieving component and a negative pressure component. When sieving is required during soft bread preparation, the motor and negative pressure fan are first started. Then, the raw materials are fed into the main body through the feeding port, causing them to fall onto the top of the screen. The powder flying during the feeding and sieving process is sucked in through the suction pipe, guided through the connecting pipe and the negative pressure pipe to the guide trough, and finally discharged back into the main body to mix with the sieving raw materials. Finally, it is discharged from the discharge port to the next process. By sucking in the flying powder, the dust generated during the addition and sieving process can be reduced. This not only improves the cleanliness of the working environment and protects the health of the surrounding staff, but also indirectly improves the quality and food safety of the bread.

Description

Technical Field

[0001] This invention belongs to the technical field of feeding devices, specifically a screening feeding device. Background Technology

[0002] Screening feeding devices are mainly used for screening and feeding of materials. Screening feeding devices generally consist of a screening structure, a conveying structure and a drive mechanism. After the material enters the device, it is separated by the screening action of the screen, and finally the screened material is sent to the next process through the conveying structure.

[0003] The application of sieving feeding devices is wide-ranging. In the preparation of soft bread, it can effectively control the mixing ratio of flour and other ingredients, ensuring the uniformity and quality of the dough. In addition, the device has a high degree of automation, reducing errors from manual operation and improving production efficiency. In the process of soft bread preparation, the use of sieving feeding devices not only improves the standardization of products but also reduces production costs, making it an indispensable part of modern bread production lines.

[0004] In the process of making soft bread, the raw materials that usually need to be screened include various powders (such as flour, baking powder, baking powder, etc.). These powders are small in size and light in weight, and are easily carried away by the air when they are added, which deteriorates the production environment. This not only makes the work area messy and affects the cleanliness and comfort of the production environment, but also makes it easy for nearby workers to inhale them, posing a threat to their health. Summary of the Invention

[0005] The purpose of this invention is to provide a screening feeding device to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a screening feeding device, comprising a device body, wherein a feeding port is provided at the top of the device body, a discharge port is provided on one side of the bottom of the device body, and a screening component and a negative pressure component are provided inside the device body;

[0007] The screening assembly includes a screen disposed inside the main body of the device. A first cam and a first spring are respectively disposed on both sides of the screen. A first rotating shaft is fixedly installed inside the first cam, and a motor is connected to the bottom end of the first rotating shaft.

[0008] The negative pressure assembly includes a connecting pipe disposed inside the main body of the device. Suction pipes are evenly connected to the inner walls of the four sides of the connecting pipe. The suction pipes are disposed above the screen. A negative pressure pipe is fixedly connected to the bottom end of the connecting pipe. The negative pressure pipe is installed at one end of a negative pressure fan. The negative pressure fan is fixedly installed on the side wall of the main body of the device. A guide groove is provided at the bottom end of the negative pressure pipe. The guide groove is opened inside the main body of the device.

[0009] As a further technical solution of the present invention, a filter screen is fixedly connected to one end of each of the suction tubes, and a tapping component is provided on one side of the filter screen.

[0010] As a further technical solution of the present invention, the guide trough is inclined.

[0011] As a further technical solution of the present invention, a baffle plate is fixedly installed inside the material guide trough, and the baffle plate is located on one side of the bottom end of the negative pressure pipe.

[0012] As a further technical solution of the present invention, a block is embedded at the bottom of the guide trough, a first connecting rod is fixedly installed on one side of the block, a movable plate is fixedly connected to the top of the first connecting rod, a limit rod is slidably installed inside the movable plate, and the limit rod is fixedly installed inside the main body of the device.

[0013] As a further technical solution of the present invention, a second spring is provided on the outer wall of the limiting rod, and the second spring is disposed on one side of the moving plate.

[0014] As a further technical solution of the present invention, the tapping assembly includes a tapping plate disposed on one side of the filter screen. A second connecting rod is fixedly connected to the side of the tapping plate away from the filter screen. The second connecting rod is slidably installed inside the suction pipe. The end of the second connecting rod away from the suction pipe is connected to a connecting plate through a rotating assembly. The connecting plate is slidably installed inside the main body of the device. A third spring is installed between the connecting plate and the main body of the device. Four connecting plates are provided, and the four connecting plates are arranged in a rectangular pattern. A second cam is provided on one side of one of the connecting plates. A second rotating shaft is fixedly installed inside the second cam. The second rotating shaft is disposed on one side of a first rotating shaft. The second rotating shaft and the first rotating shaft are connected by a belt pulley system.

[0015] As a further technical solution of the present invention, a wedge block is fixedly installed at the end of the connecting plate.

[0016] As a further technical solution of the present invention, the inside of the striking plate is uniformly provided with striking blocks, the striking blocks are slidably connected to the striking plate, and a fourth spring is installed between the striking blocks and the striking plate.

[0017] As a further technical solution of the present invention, the rotating assembly includes a limiting shaft slidably mounted on the outer wall of the second connecting rod, one end of the limiting shaft being fixedly mounted on the side wall of the connecting plate, a sliding groove being provided inside the limiting shaft, and a slider being slidably connected inside the sliding groove, the slider being fixedly mounted on the outer wall of the second connecting rod.

[0018] The beneficial effects of this invention are as follows:

[0019] 1. This invention utilizes a screening component and a negative pressure component working together. When screening is required during soft bread preparation, the motor and negative pressure fan are first started. Then, the raw material is fed into the main body of the device through the inlet, causing it to fall onto the top of the screen. When the motor starts, it drives the first rotating shaft to rotate. The rotation of the first rotating shaft drives the rotation of the first cam. When the convex end of the first cam contacts the screen, it moves the screen to one side, simultaneously causing the first spring to deform and store elastic potential energy. When the convex end of the first cam moves away from one side of the screen, the elastic potential energy is released by the first spring, causing the screen to return to its original position. This process is achieved through the continuous rotation of the first cam and... The first spring engages to reciprocate the screen to sieve the raw materials. When the negative pressure fan starts, it generates negative pressure, which is connected to the suction pipe through the connecting pipe. The powder that flies during the feeding and sieving process is sucked in through the suction pipe, guided through the connecting pipe and the negative pressure pipe to the inside of the guide trough, and finally discharged back into the main body of the device to mix with the sieved raw materials. Finally, it is discharged from the outlet to the next process. By sucking in the flying powder, the dust generated during the raw material addition and sieving process can be reduced. This not only improves the cleanliness of the working environment and protects the health of the surrounding staff, but also indirectly improves the quality and food safety of the bread.

[0020] 2. This invention, through the setting of the percussion component, enables the rotation of the first rotating shaft to drive the rotation of the second rotating shaft via a belt pulley set during raw material screening. The rotation of the second rotating shaft drives the rotation of the second cam, causing the second cam to move the connecting plate. Through the elastic cooperation of the third spring, the connecting plate reciprocates. The movement of the connecting plate causes the second connecting rod to slide inside the suction pipe. The movement of the second connecting rod causes the percussion plate to move, causing the percussion plate to reciprocate and percuss the side wall of the filter screen. This helps to discharge the powder adhering to the side wall or inside of the filter screen, which not only improves the powder collection rate but also ensures the negative pressure effect.

[0021] 3. The present invention uses a rotating assembly. When the tapping occurs, the movement of the connecting plate drives the movement of the limiting shaft. When the side wall of the limiting shaft contacts the slider, it causes the slider to slide inside the groove, causing the second connecting rod to rotate. This causes the tapping plate to rotate at a certain angle, so that the tapping plate changes its angle each time it taps the filter screen, thereby increasing the tapping area and tapping effect. Attached Figure Description

[0022] Figure 1This is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 This is a schematic cross-sectional view of the overall structure of the present invention;

[0024] Figure 3 This is a schematic cross-sectional view of the main body of the device of the present invention;

[0025] Figure 4 For the present invention Figure 3 Enlarged schematic diagram of the structure at point A in the middle;

[0026] Figure 5 For the present invention Figure 3 Enlarged schematic diagram of the structure at point B;

[0027] Figure 6 This is a schematic diagram of the structure at the connecting plate of the present invention;

[0028] Figure 7 This is a schematic diagram of the structure at the limiting shaft of the present invention;

[0029] Figure 8 This is a schematic cross-sectional view of the structure at the limiting shaft of the present invention;

[0030] Figure 9 This is a schematic diagram of the blockage structure of the present invention.

[0031] In the diagram: 1. Main body of the device; 2. Feed inlet; 3. Discharge outlet; 4. Screen; 5. First cam; 6. First rotating shaft; 7. Motor; 8. First spring; 9. Suction pipe; 10. Connecting pipe; 11. Negative pressure pipe; 12. Negative pressure fan; 13. Guide chute; 14. Filter screen; 15. Baffle plate; 16. Block; 17. First connecting rod; 18. Moving plate; 19. Limiting rod; 20. Second spring; 21. Second connecting rod; 22. Striking plate; 23. Connecting plate; 24. Third spring; 25. Second cam; 26. Second rotating shaft; 27. Pulley assembly; 28. Limiting shaft; 29. ​​Slide groove; 30. Sliding block; 31. Wedge block; 32. Striking block; 33. Fourth spring. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] like Figures 1 to 9As shown in the embodiment of the present invention, a screening feeding device includes a device body 1, a feeding port 2 is provided at the top of the device body 1, a discharge port 3 is provided on one side of the bottom of the device body 1, and a screening component and a negative pressure component are provided inside the device body 1.

[0034] The screening assembly includes a screen 4 disposed inside the main body 1 of the device. A first cam 5 and a first spring 8 are respectively disposed on both sides of the screen 4. A first rotating shaft 6 is fixedly installed inside the first cam 5. A motor 7 is connected to the bottom end of the first rotating shaft 6.

[0035] The negative pressure assembly includes a connecting pipe 10 disposed inside the main body 1 of the device. Suction pipes 9 are evenly connected to the inner walls of the four sides of the connecting pipe 10. The suction pipes 9 are disposed above the screen 4. A negative pressure pipe 11 is fixedly connected to the bottom end of the connecting pipe 10. The negative pressure pipe 11 is installed at one end of the negative pressure fan 12. The negative pressure fan 12 is fixedly installed on the side wall of the main body 1 of the device. A guide trough 13 is provided at the bottom end of the negative pressure pipe 11. The guide trough 13 is opened inside the main body 1 of the device.

[0036] The air inlet of the negative pressure pipe 11 is connected to the connecting pipe 10, and the air outlet of the negative pressure pipe 11 is connected to the guide trough 13.

[0037] By using the screening component and the negative pressure component in combination, when screening is required during the preparation of soft bread, the motor 7 and the negative pressure fan 12 are started first, and then the raw material is put into the main body 1 of the device from the feed port 2, so that the raw material falls on the top of the screen 4.

[0038] When the motor 7 starts, it drives the first rotating shaft 6 to rotate. The rotation of the first rotating shaft 6 drives the rotation of the first cam 5. When the convex end of the first cam 5 contacts the screen 4, it drives the screen 4 to move to one side. At the same time, the first spring 8 is deformed and stores elastic potential energy. When the convex end of the first cam 5 moves away from one side of the screen 4, the elastic potential energy is released through the first spring 8, causing the screen 4 to move back to its original position. The continuous rotation of the first cam 5 and its cooperation with the first spring 8 cause the screen 4 to move back and forth to screen the raw materials.

[0039] When the negative pressure fan 12 starts, it generates negative pressure, which is connected to the suction pipe 9 through the connecting pipe 10. The powder flying during the raw material input and screening process is sucked in from the suction pipe 9, and guided to the inside of the guide trough 13 through the connecting pipe 10 and the negative pressure pipe 11. Finally, it is discharged back into the main body 1 of the device, mixed with the screened raw material, and finally discharged from the outlet 3 to the next process.

[0040] By drawing in the airborne powder, dust generated during the addition and sieving of raw materials can be reduced. This not only improves the cleanliness of the working environment and protects the health of surrounding staff, but also indirectly improves the quality and safety of bread.

[0041] like Figures 1 to 4As shown, a filter screen 14 is fixedly connected to one end of each suction pipe 9, and a tapping component is provided on one side of the filter screen 14.

[0042] To prevent large particles of raw material from being sucked in, ensuring that the raw material can be fully screened.

[0043] like Figure 3 and Figure 5 As shown, the feed chute 13 is inclined.

[0044] When the sucked-in raw material falls from the negative pressure pipe 11 into the guide trough 13, it is tilted and guided into the main body 1 of the device to mix with the screened raw material, so as to minimize the waste of raw material.

[0045] like Figure 5 As shown, a baffle plate 15 is fixedly installed inside the guide trough 13, and the baffle plate 15 is located on one side of the bottom end of the negative pressure pipe 11.

[0046] The top of the guide trough 13 faces the outside of the device body 1, and the bottom of the guide trough 13 faces the inside of the device body 1.

[0047] When the sucked-in raw material enters the feed trough 13, the gas flows upward and is discharged from the top of the feed trough 13, while the powder is discharged downward into the main body 1 of the device.

[0048] The baffle plate 15 buffers the sucked-in raw material to prevent the raw material from impacting the screened raw material inside the main body 1 due to air pressure when it enters the main body 1.

[0049] like Figure 3 and Figure 5 As shown, a block 16 is embedded at the bottom of the feed chute 13, a first connecting rod 17 is fixedly installed on one side of the block 16, a movable plate 18 is fixedly connected to the top of the first connecting rod 17, a limit rod 19 is slidably installed inside the movable plate 18, and the limit rod 19 is fixedly installed inside the main body 1 of the device.

[0050] The block 16 is located at the bottom of the feed chute 13. When no material is being discharged, the end of the feed chute 13 is blocked by the block 16 to prevent the raw material in the main body 1 of the device from entering the interior of the feed chute 13.

[0051] like Figure 5 and Figure 9 As shown, a second spring 20 is provided on the outer wall of the limiting rod 19, and the second spring 20 is located on one side of the moving plate 18.

[0052] When the raw material is sucked into the feed trough 13 by negative pressure, the weight of the powder pushes the block 16 open, allowing the powder inside the feed trough 13 to be discharged.

[0053] When the block 16 moves, it drives the moving plate 18 to slide on the outer wall of the limiting rod 19 through the first connecting rod 17. At the same time, it causes the second spring 20 to deform and store elastic potential energy. After the material is discharged, the elastic potential energy is released through the second spring 20 to move the moving plate 18 back to its original position, so that the block 16 seals the bottom of the guide trough 13.

[0054] like Figures 1 to 8 As shown, the tapping assembly includes a tapping plate 22 disposed on one side of the filter screen 14. A second connecting rod 21 is fixedly connected to the side of the tapping plate 22 away from the filter screen 14. The second connecting rod 21 is slidably installed inside the suction pipe 9. The end of the second connecting rod 21 away from the suction pipe 9 is connected to a connecting plate 23 through a rotating assembly. The connecting plate 23 is slidably installed inside the device body 1. A third spring 24 is installed between the connecting plate 23 and the device body 1. There are four connecting plates 23, which are arranged in a rectangular pattern. A second cam 25 is disposed on one side of one of the connecting plates 23. A second rotating shaft 26 is fixedly installed inside the second cam 25. The second rotating shaft 26 is disposed on one side of the first rotating shaft 6. The second rotating shaft 26 and the first rotating shaft 6 are connected by a pulley group 27.

[0055] During raw material screening, the rotation of the first rotating shaft 6 drives the rotation of the second rotating shaft 26 via the pulley group 27. The rotation of the second rotating shaft 26 drives the rotation of the second cam 25, causing the second cam 25 to move the connecting plate 23. Through the elastic cooperation of the third spring 24, the connecting plate 23 moves back and forth. The movement of the connecting plate 23 causes the second connecting rod 21 to slide inside the suction pipe 9. The movement of the second connecting rod 21 causes the striking plate 22 to move, causing the striking plate 22 to repeatedly strike the side wall of the filter screen 14. This helps to discharge the powder adhering to the side wall or inside of the filter screen 14, which not only improves the powder collection rate but also ensures the negative pressure effect.

[0056] like Figure 2 , Figure 3 and Figure 6 As shown, a wedge block 31 is fixedly installed at the end of the connecting plate 23.

[0057] When one of the connecting plates 23 moves by the rotation of the second cam 25, the movement of the connecting plate 23 drives the movement of the wedge block 31. The inclined surface of the wedge block 31 contacts the two adjacent connecting plates 23 and drives them to move. The wedge block 31 at one end of the two adjacent connecting plates 23 drives the other connecting plate 23 to move, so that the four connecting plates 23 move synchronously, so that the side walls of the filter screen 14 around the perimeter can be tapped, ensuring the comprehensiveness of the tapping.

[0058] like Figure 7 and Figure 8As shown, striking blocks 32 are evenly arranged inside the striking plate 22. The striking blocks 32 are slidably connected to the striking plate 22, and a fourth spring 33 is installed between the striking blocks 32 and the striking plate 22.

[0059] When the tapping plate 22 taps the side wall of the filter screen 14, the movement of the tapping plate 22 drives the movement of the tapping block 32. When the end of the tapping block 32 contacts the side wall of the filter screen 14, the elasticity of the fourth spring 33 produces a certain buffering effect to reduce the impact on the filter screen 14 and thus improve its service life.

[0060] like Figure 7 and Figure 8 As shown, the rotating assembly includes a limiting shaft 28 that is slidably mounted on the outer wall of the second connecting rod 21. One end of the limiting shaft 28 is fixedly mounted on the side wall of the connecting plate 23. A groove 29 is provided inside the limiting shaft 28. A slider 30 is slidably connected inside the groove 29. The slider 30 is fixedly mounted on the outer wall of the second connecting rod 21.

[0061] In order to minimize the negative pressure effect of the striking plate 22 on the suction pipe 9, the striking plate 22 is set to be relatively narrow;

[0062] During the tapping, the movement of the connecting plate 23 drives the movement of the limiting shaft 28. When the side wall of the limiting shaft 28 contacts the slider 30, it causes the slider 30 to slide inside the groove 29, causing the second connecting rod 21 to rotate, thereby causing the tapping plate 22 to rotate at a certain angle. This allows the tapping plate 22 to change its angle each time it taps the filter screen 14, thereby increasing the tapping area and tapping effect.

[0063] Working principle and usage process:

[0064] When sieving the feed is required during the preparation of soft bread, first start the motor 7 and the negative pressure fan 12, and then put the raw material into the main body 1 of the device from the feed port 2, so that the raw material falls on the top of the screen 4.

[0065] When the motor 7 starts, it drives the first rotating shaft 6 to rotate. The rotation of the first rotating shaft 6 drives the rotation of the first cam 5. When the convex end of the first cam 5 contacts the screen 4, it drives the screen 4 to move to one side. At the same time, the first spring 8 is deformed and stores elastic potential energy. When the convex end of the first cam 5 moves away from one side of the screen 4, the elastic potential energy is released through the first spring 8, causing the screen 4 to move back to its original position. The continuous rotation of the first cam 5 and its cooperation with the first spring 8 cause the screen 4 to move back and forth to screen the raw materials.

[0066] The rotation of the first rotating shaft 6 drives the rotation of the second rotating shaft 26 through the belt pulley group 27. The rotation of the second rotating shaft 26 drives the rotation of the second cam 25, causing the second cam 25 to move the connecting plate 23. Through the elastic cooperation of the third spring 24, the connecting plate 23 moves back and forth. The movement of the connecting plate 23 causes the second connecting rod 21 to slide inside the suction pipe 9. The movement of the second connecting rod 21 causes the striking plate 22 to move, causing the striking plate 22 to reciprocate and strike the side wall of the filter screen 14.

[0067] The movement of the connecting plate 23 drives the movement of the limiting shaft 28. When the side wall of the limiting shaft 28 contacts the slider 30, it causes the slider 30 to slide inside the slide groove 29, causing the second connecting rod 21 to rotate, thereby causing the striking plate 22 to rotate at a certain angle, changing the angle of the striking plate 22 when repeatedly striking the filter screen 14.

[0068] When the negative pressure fan 12 starts, it generates negative pressure, which is connected to the suction pipe 9 via the connecting pipe 10. The powder flying during the raw material input and screening process is sucked in through the suction pipe 9, and guided to the inside of the guide trough 13 via the connecting pipe 10 and the negative pressure pipe 11. The sucked raw material is buffered by the baffle plate 15, and the block 16 is pushed open by the gravity of the powder, so that the powder inside the guide trough 13 is discharged into the main body of the device 1. Finally, it is discharged together with the screened raw material from the discharge port 3 to the next process.

[0069] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A screening feeding device, comprising a device body (1), characterized in that: The device body (1) has a feed inlet (2) at the top and a discharge outlet (3) on one side of the bottom. The device body (1) is equipped with a screening component and a negative pressure component inside. The screening assembly includes a screen (4) disposed inside the main body (1) of the device. A first cam (5) and a first spring (8) are respectively disposed on both sides of the screen (4). A first rotating shaft (6) is fixedly installed inside the first cam (5). A motor (7) is connected to the bottom end of the first rotating shaft (6). The negative pressure assembly includes a connecting pipe (10) disposed inside the main body (1) of the device. Suction pipes (9) are evenly connected to the inner walls of the four sides of the connecting pipe (10). The suction pipes (9) are disposed above the screen (4). A negative pressure pipe (11) is fixedly connected to the bottom end of the connecting pipe (10). The negative pressure pipe (11) is installed at one end of a negative pressure fan (12). The negative pressure fan (12) is fixedly installed on the side wall of the main body (1) of the device. A guide groove (13) is provided at the bottom end of the negative pressure pipe (11). The guide groove (13) is opened inside the main body (1) of the device. A block (16) is embedded at the bottom end of the guide groove (13). A first connecting rod (17) is fixedly installed on one side of the block (16). A moving plate (18) is fixedly connected to the top end of the first connecting rod (17). A limit rod (19) is slidably installed inside the moving plate (18). The limit rod (19) is fixedly installed inside the main body (1) of the device. Each of the suction pipes (9) is fixedly connected to a filter screen (14) at one end. A tapping assembly is provided on one side of the filter screen (14). The tapping assembly includes a tapping plate (22) provided on one side of the filter screen (14). A second connecting rod (21) is fixedly connected to the side of the tapping plate (22) away from the filter screen (14). The second connecting rod (21) is slidably installed inside the suction pipe (9). The end of the second connecting rod (21) away from the suction pipe (9) is connected to a connecting plate (23) through a rotating assembly. The connecting plate (23) is slidably installed on the main body of the device. Inside the body (1), a third spring (24) is installed between the connecting plate (23) and the main body (1). There are four connecting plates (23), which are arranged in a rectangular shape. A second cam (25) is provided on one side of one of the connecting plates (23). A second rotating shaft (26) is fixedly installed inside the second cam (25). The second rotating shaft (26) is located on one side of the first rotating shaft (6). The second rotating shaft (26) and the first rotating shaft (6) are connected by a pulley group (27).

2. The screening feeding device according to claim 1, characterized in that: The feed trough (13) is inclined.

3. The screening feeding device according to claim 1, characterized in that: A baffle plate (15) is fixedly installed inside the guide trough (13), and the baffle plate (15) is located on one side of the bottom end of the negative pressure pipe (11).

4. The screening feeding device according to claim 1, characterized in that: The outer wall of the limiting rod (19) is provided with a second spring (20), which is located on one side of the moving plate (18).

5. A screening feeding device according to claim 1, characterized in that: A wedge (31) is fixedly installed at the end of the connecting plate (23).

6. A screening feeding device according to claim 1, characterized in that: The inside of the striking plate (22) is uniformly provided with striking blocks (32), the striking blocks (32) are slidably connected to the striking plate (22), and a fourth spring (33) is installed between the striking blocks (32) and the striking plate (22).

7. A screening feeding device according to claim 1, characterized in that: The rotating assembly includes a limiting shaft (28) that is slidably mounted on the outer wall of the second connecting rod (21). One end of the limiting shaft (28) is fixedly mounted on the side wall of the connecting plate (23). A sliding groove (29) is provided inside the limiting shaft (28). A slider (30) is slidably connected inside the sliding groove (29). The slider (30) is fixedly mounted on the outer wall of the second connecting rod (21).

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