Fruit thinning machine before blooming of big-brand grapes

Abstract

The utility model relates to the technical field of agricultural machinery, and discloses a machine for thinning fruits before blooming of Shuo-brand grapes, which comprises two machine bodies, handles are fixedly connected to the bottoms of the outer walls of the two machine bodies, two partition plates are fixedly connected to the inner walls of the two handles, a motor is arranged on the adjacent side of the two partition plates on the same side, and the two partition plates are arranged on the same side. The output ends of the two motors are both fixedly connected with transmission shafts, the outer walls of the two transmission shafts are both fixedly connected with transmission plates, the outer walls of the two transmission plates are both fixedly connected with driving shafts, the outer walls of the two driving shafts are both rotatably connected with driving plates, and the outer walls of the two driving plates are both fixedly connected with arranging plates. According to the grape fruit thinning device, the motor serves as a power source, the output end of the motor drives all the components to operate, finally the thinning teeth are driven to rotate at a high speed to comb grape inflorescences or flowers, weak and poor-development inflorescences or flowers are knocked down or pulled down, the fruit thinning purpose is achieved, and the grape fruit quality is improved.

Description

Technical Field

[0001] This utility model relates to the field of agricultural machinery technology, and in particular to the Zhishuo brand grape pre-flowering fruit thinning machine. Background Technology

[0002] In grape cultivation, pre-flowering fruit thinning is a crucial agricultural operation. Grape clusters produce numerous flowers, and if all flowers are allowed to develop into fruits, the fruits will compete for nutrients, resulting in inconsistent fruit size and quality. Furthermore, the excessive load can weaken the vine and make it more susceptible to pests and diseases. By removing some underdeveloped and weak inflorescences and flowers, limited nutrients can be concentrated on the remaining high-quality fruits, enhancing the grapes' market competitiveness. As the scale of grape cultivation continues to expand, the problems of low efficiency and high cost of manual fruit thinning have become increasingly prominent. Therefore, fruit thinning machines have emerged.

[0003] Fruit thinning machines are agricultural machinery specifically designed for thinning grapes before flowering. They simulate manual fruit thinning through mechanization, precisely sorting grape inflorescences and flowers. This allows for quick and efficient fruit thinning while reducing damage to the grapevines caused by manual operation and lowering the risk of disease and pest transmission due to human factors, thus laying the foundation for high-quality and high-yield grapes.

[0004] Existing fruit thinning machines use mechanical vibration to thin the fruit. Vibration is generated through an eccentric wheel and a crank connecting rod mechanism and transmitted to the grapevines, avoiding the low efficiency of manual fruit thinning. However, in actual operation, the frequency and amplitude of mechanical vibration are difficult to adjust precisely, which may result in over- or under-thinning. Therefore, the Zhishuo brand grape pre-flowering fruit thinning machine is proposed to solve the above problems. Utility Model Content

[0005] To overcome the above deficiencies, this utility model provides a Zhishuo brand grape pre-flowering thinning machine, which aims to improve the problems of over-thinning or under-thinning in the existing technology.

[0006] To achieve the above objectives, this utility model adopts the following technical solution: A Zhishuo brand grape pre-flowering thinning machine includes two machine bodies. A handle is fixedly connected to the bottom of the outer wall of each of the two machine bodies. Two partitions are fixedly connected to the inner wall of each of the two handles. A motor is arranged on an adjacent side of the two partitions on the same side. A transmission shaft is fixedly connected to the output end of each of the two motors. A transmission plate is fixedly connected to the outer wall of each of the two transmission shafts. A drive shaft is fixedly connected to the outer wall of each of the two transmission plates. A drive plate is rotatably connected to the outer wall of each of the two drive shafts. A slugging plate is fixedly connected to the outer wall of each of the two drive plates. Multiple rotating shafts are rotatably connected to the inner wall of each of the two slugging plates. A rotating plate is fixedly connected to the outer wall of each of the multiple rotating shafts. A thinning shaft is fixedly connected to the inner wall of each of the multiple rotating plates. Multiple thinning teeth are fixedly connected to the outer wall of each of the multiple thinning shafts. A top cover is provided on an adjacent side of each of the two machine bodies. The same limiting mechanism is provided on the right side of the outer wall of each of the two machine bodies. The limiting mechanism is used to limit the opening and closing degree of the thinning machine.

[0007] As a further description of the above technical solution:

[0008] The limiting mechanism includes two screws, the outer walls of which are threaded to the right sides of the two machine bodies respectively. Two screw holes are opened on the left and right sides of the outer walls of the two machine bodies. Screw rings are slidably connected to the outer walls of the two screws. The same limiting strip is provided on the right side of the two machine bodies. A fixed hole is opened on the rear side of the outer wall of the limiting strip, and a limiting groove is opened on the front side of the outer wall of the limiting strip.

[0009] As a further description of the above technical solution:

[0010] The outer walls of both top covers are provided with multiple screw holes, and the tops of both top covers are provided with clamping openings.

[0011] As a further description of the above technical solution:

[0012] Two rotating seats are fixedly connected to adjacent sides of the outer walls of the two handles, and the inner walls of the multiple rotating seats are slidably connected to the same connecting shaft.

[0013] As a further description of the above technical solution:

[0014] A spring is slidably connected to the outer wall of the connecting shaft, and two force grooves are provided on the outer walls of both handles.

[0015] As a further description of the above technical solution:

[0016] Both inner walls of the two machine bodies are slidably connected with plugs, and the outer walls of both plugs are fixedly connected with multiple sealing rings.

[0017] As a further description of the above technical solution:

[0018] A switch is provided on the front side of the outer wall of the front body, and the switch is electrically connected to the motor.

[0019] As a further description of the above technical solution:

[0020] Two mounting holes are provided in the middle of the outer wall of the two machine bodies, and a cross groove is provided on the right side of the outer wall of the two screws.

[0021] This utility model has the following beneficial effects:

[0022] 1. In this utility model, a motor is used as a power source, and its output end drives the operation of various components, which in turn drives the sparse teeth to rotate at high speed to sort the grape inflorescences or flowers, so that the weaker and poorly developed inflorescences or flowers are knocked off or torn off, thereby achieving the purpose of fruit thinning and improving the quality of grape fruits.

[0023] 2. In this utility model, by setting a limiting groove on the front side of the outer wall of the limiting strip, and allowing the screws on the outer wall of the machine body that are not fixed to the limiting strip to slide in the limiting groove, the machine body can be limited to approach the limit during the closing process of the fruit thinner, based on the sliding position of the screws in the limiting groove, thereby limiting the maximum closing degree of the fruit thinner. Attached Figure Description

[0024] Figure 1 This is a three-dimensional schematic diagram of the pre-flowering thinning machine for grapes proposed in this utility model;

[0025] Figure 2 This is a schematic diagram of the structure of the Zhishuo brand grape pre-flowering fruit thinning machine proposed in this utility model;

[0026] Figure 3 This is an exploded view of the body of the Zhishuo brand grape pre-flowering fruit thinning machine proposed in this utility model;

[0027] Figure 4 This is a partial structural schematic diagram of the Zhishuo brand grape pre-flowering fruit thinning machine proposed in this utility model;

[0028] Figure 5 This is a partial structural cross-sectional view of the Zhishuo brand grape pre-flowering fruit thinning machine proposed in this utility model;

[0029] Figure 6 This is a schematic diagram of the limiting mechanism of the Zhishuo brand grape pre-flowering thinning machine proposed in this utility model.

[0030] Legend:

[0031] 1. Body; 2. Limiting mechanism; 201. Nail hole; 202. Screw; 203. Nail ring; 204. Limiting strip; 205. Fixed hole; 206. Limiting groove; 3. Handle; 4. Partition plate; 5. Motor; 6. Drive shaft; 7. Drive plate; 8. Drive shaft; 9. Drive plate; 10. Arrangement plate; 11. Rotating shaft; 12. Rotating plate; 13. Scraping shaft; 14. Scraping teeth; 15. Top cover; 16. Screw hole; 17. Clamp; 18. Rotating seat; 19. Connecting shaft; 20. Spring; 21. Force groove; 22. Plug; 23. Sealing ring; 24. Switch; 25. Mounting hole; 26. Cross groove. Detailed Implementation

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

[0033] See attached document Figure 2 Appendix Figure 3 and attached Figure 4This utility model provides an embodiment of a Zhishuo brand grape pre-flowering thinning machine, comprising two machine bodies 1. The machine bodies 1 are used to support and install other components, providing support for the overall structure of the thinning machine. Handles 3 are fixedly connected to the bottom of the outer walls of both machine bodies 1. The handles 3 are easy for operators to grip, making operation more stable and convenient. Two partitions 4 are fixedly connected to the inner walls of both handles 3. The partitions 4 can reasonably divide the internal space of the handles 3, providing a stable installation position for motors 5. Motors 5 are arranged on adjacent sides of the two partitions 4 on the same side. Motors 5 serve as the power source for the entire thinning machine, providing power for its operation. Drive shafts 6 are fixedly connected to the output ends of both motors 5, transmitting the power of the motors 5 to a transmission plate 7. The transmission plate 7 is driven to rotate. The outer walls of both transmission shafts 6 are fixedly connected to the transmission plate 7. The transmission plate 7 converts the rotation of the transmission shaft 6 into the circular motion of the drive shaft 8. The outer walls of both transmission plates 7 are fixedly connected to the drive shaft 8. The drive shaft 8 drives the drive plate 9 to reciprocate through its circular motion. The outer walls of both drive shafts 8 are rotatably connected to the drive plate 9. The reciprocating motion of the drive plate 9 drives the arrangement plate 10 to move. The outer walls of both drive plates 9 are fixedly connected to the arrangement plate 10. The movement of the arrangement plate 10 causes multiple rotating shafts 11 rotatably connected to its inner walls to rotate synchronously. The inner walls of both arrangement plates 10 are rotatably connected to multiple rotating shafts 11. The rotation of the rotating shafts 11 drives the rotating plate 12 to rotate. The outer walls of the multiple rotating shafts 11 are fixedly connected to the rotating plate 12. The rotation of the rotating plate 12 provides power for the rotation of the thinning shaft 13. The inner walls of multiple rotating plates 12 are fixedly connected to the thinning shaft 13. The thinning shaft 13 drives multiple thinning teeth 14 fixedly connected to its outer wall to rotate at high speed. Multiple thinning teeth 14 are fixedly connected to the outer walls of the multiple thinning shafts 13. The high-speed rotation of the thinning teeth 14 combs through the grape inflorescences or flowers, achieving the purpose of thinning the fruit. Each of the two machine bodies 1 has a top cover 15 on an adjacent side. The top cover 15 protects the internal components of the machine body 1 and increases the structural stability of the machine body 1. Multiple screw holes 16 are opened on the outer walls of both top covers 15. The screw holes 16 are used to engage with screws to firmly connect the top cover 15 to the machine body 1. A clamping slot 17 is opened on the top of each of the two top covers 15. The clamping slot 17 can be used to clamp auxiliary tools. The machine is equipped with or fixed related equipment. Two rotating seats 18 are fixedly connected to adjacent sides of the outer wall of the two handles 3. The rotating seats 18 provide a sliding track for the connecting shaft 19. The inner walls of multiple rotating seats 18 are slidably connected to the same connecting shaft 19. The connecting shaft 19 allows the two handles 3 to rotate relative to each other and provides an installation position for the spring 20. The outer wall of the connecting shaft 19 is slidably connected to the spring 20. The spring 20 plays a role in buffering and resetting when the operator operates the handles 3, increasing the comfort and flexibility of operation. Two force grooves 21 are opened on the outer wall of the two handles 3. The force grooves 21 receive the pressure transmitted by the end of the spring 20. The same limiting mechanism 2 is set on the right side of the outer wall of the two machine bodies 1. The limiting mechanism 2 is used to limit the opening and closing degree of the fruit thinner.

[0034] Specifically, the operator holds the handles 3 at the bottom of the two machine bodies 1. At this time, the two ends of the springs 20 are locked in the force grooves 21 of the handles 3, and the fruit thinner is in a naturally open and closed state. After approaching the grapevines, the operator grips the handles 3 tightly, the springs 20 are compressed, the two machine bodies 1 are brought closer, and the fruit thinner closes. The grapevine stems are located in the space formed by the clamps 17 on both sides, and the flowers, fruits and leaves are close to the inner wall of the machine body 1. The two partitions 4 on the inner wall of the handles 3 provide a stable installation space for the motor 5. The motor 5 is started, and its output end drives the transmission shaft 6 to rotate. The transmission shaft 6 drives the transmission plate 7 to rotate. The transmission plate 7 drives the drive shaft 8 to make a circular motion around the transmission shaft 6. The drive shaft 8 drives the drive plate 9. The drive plate 9 drives the rack 10 to move synchronously. The movement of the rack 10 causes the multiple rotating shafts 11 connected to its inner wall to rotate synchronously. The rotating shaft 11 drives the rotating plate 12, which is fixed on its outer wall, to rotate around the sparse shaft 13. The sparse shaft 13 is engaged in the round hole between the machine body 1 and the top cover 15. The rotation of the rotating plate 12 drives the sparse shaft 13 to rotate. The sparse shaft 13 drives the multiple sparse teeth 14 on its outer wall to rotate at high speed, sorting the grape inflorescences or flowers. Weak and poorly developed inflorescences or flowers are knocked off or torn off into the machine body 1, completing the thinning. The top cover 15 on the adjacent side of the machine body 1 is connected to the machine body 1 through the screw hole 16 on the outer wall and screws, which plays a reinforcing role. The inner wall of the rotating seat 18 on the adjacent side of the outer wall of the handle 3 is slidably connected to the connecting shaft 19. The outer wall of the connecting shaft 19 is slidably connected to the spring 20. When the handle 3 is operated, the two machine bodies 1 rotate around the connecting shaft 19. The spring 20 plays a buffering and restoring role.

[0035] See attached document Figure 1 Appendix Figure 2 and attached Figure 6 The limiting mechanism 2 includes two screws 202, which are used to connect to the machine body 1 and provide an installation base for the limiting mechanism 2. The outer walls of the two screws 202 are threaded to the right sides of the two machine bodies 1, respectively. The threaded connection ensures the stability of the installation. Two nail holes 201 are opened on the left and right sides of the outer walls of the two machine bodies 1, which provide corresponding positions for the installation of the screws 202. Nail rings 203 are slidably connected to the outer walls of the two screws 202. The nail rings 203 connect the limiting strip 204 to the machine body 1. The two machine bodies 1 are separated by a common limiting strip 204 on their right sides. The limiting strip 204 is used to limit the opening and closing degree of the machine body 1. A fixed hole 205 is provided on the rear side of the outer wall of the limiting strip 204. The fixed hole 205 is used to fix the limiting strip 204 on one machine body 1 by cooperating with one of the screws 202. A limiting groove 206 is provided on the front side of the outer wall of the limiting strip 204. The limiting groove 206 is used to limit the sliding range of the screw 202 on the other machine body 1, thereby limiting the opening and closing degree of the fruit thinner.

[0036] Specifically, when the fruit thinner enters the closed state, a limit strip 204 is fixed to the outer wall of one body 1 by a screw 202 in the fixed hole 205. The screw 202 on the outer wall of the other body 1, which is not fixed to the limit strip 204, slides in the limit groove 206 on the front side of the outer wall of the limit strip 204. As the operator grips the handle 3, the two bodies 1 gradually approach each other. During this process, the distance that the screw 202 moves in the limit groove 206 increases continuously. When the screw 202 slides to the limit position of the limit groove 206, it prevents the body 1 from approaching further. When the operator releases the handle 3, the spring 20 returns to its original position, and the two bodies 1 begin to open. At this time, the screw 202 on the outer wall of the body 1, which is still not fixed to the limit strip 204, slides in the opposite direction in the limit groove 206. As the body 1 opens, when the screw 202 slides to the limit position on the other side of the limit groove 206, it restricts the body 1 from opening further.

[0037] See attached document Figure 1 Appendix Figure 5 and attached Figure 6 Both machine bodies 1 have plugs 22 slidably connected to their inner walls. The plugs 22 can be slidably connected to close or open the internal space of the machine body 1, making it convenient to clean up the fallen flower clusters or flowers inside. Both plugs 22 have multiple sealing rings 23 fixedly connected to their outer walls. The sealing rings 23 can enhance the sealing between the plugs 22 and the inner wall of the machine body 1, preventing debris from entering the machine body 1. A switch 24 is provided on the front side of the outer wall of the front machine body 1. The switch 24 is used to control the start and stop of the motor 5, making it convenient for the operator to operate the power system of the fruit thinner. The switch 24 is electrically connected to the motor 5, ensuring that the switch 24 can effectively control the operating status of the motor 5. Two mounting holes 25 are opened in the middle of the outer walls of both machine bodies 1. The mounting holes 25 can be used to install the motor 5. Both screws 202 have cross grooves 26 on the right side of their outer walls. The cross grooves 26 make it easy to install, remove or adjust the screws 202 using a screwdriver.

[0038] Specifically, the plug 22, which slides on the inner wall of the machine body 1, can flexibly close or open the internal space of the machine body 1, making it easy to clean up the flower clusters or flowers that are torn off during fruit thinning and keep the inside of the machine body 1 clean. The sealing ring 23 on the outer wall of the plug 22 enhances the sealing performance and effectively prevents debris from entering. The switch 24 is located on the front side of the outer wall of the front machine body 1 and is electrically connected to the motor 5, making it convenient for the operator to accurately control the start and stop of the motor 5, thereby controlling the power system of the fruit thinner and ensuring that the fruit thinning work is carried out as needed. The mounting holes 25 in the middle of the two outer walls of the machine body 1 provide a position for the installation of the motor 5, ensuring the stable installation of the power source. The cross groove 26 on the right side of the outer wall of the screw 202 is designed to facilitate the installation, disassembly or adjustment of the screw using a screwdriver, making the equipment more convenient and efficient in the assembly and maintenance process.

[0039] Working principle: The operator first holds the two handles 3 at the bottom of the machine body 1 for stable grip. The two ends of the spring 20 are engaged in the force grooves 21 of the two handles 3, so that the fruit thinner is in an open and closed state in its natural state. After bringing the open and closed fruit thinner close to the grapevines, the operator grips the two handles 3 tightly, the springs 20 are compressed, the two machine bodies 1 are brought closer, and the fruit thinner is in a closed state. The grapevine stems are in the space formed by the clamps 17 on both sides, and the flowers, fruits and leaves are close to the inner wall of the machine body 1. The two partitions 4 on the inner wall of the handles 3 provide power to the motor 5. To ensure a stable installation space, motor 5, serving as the power source for the entire fruit thinner, starts operating upon startup. Its output drives the transmission shaft 6, which is fixedly connected to it, to rotate. The rotation of transmission shaft 6 causes the transmission plate 7, fixed to its outer wall, to rotate as well. The rotation of transmission plate 7 further drives the drive shaft 8, fixedly connected to its outer wall, to rotate around the transmission shaft 6. Drive shaft 8 drives the plate 9, which in turn drives the tray 10 to move synchronously. The movement of tray 10 causes multiple rotating shafts 11, rotatably connected to its inner wall, to rotate synchronously. The rotation of the rotating shafts 11 drives the fixed... A rotating plate 12, fixed to its outer wall, rotates around a thinning shaft 13. The thinning shaft 13 engages in a circular hole between the machine body 1 and the top cover 15. When the rotating plate 12 rotates, the thinning shaft 13, fixedly connected to its inner wall, rotates accordingly. The thinning shaft 13 drives multiple thinning teeth 14, fixedly connected to its outer wall, to rotate at high speed. The high-speed rotating thinning teeth 14 comb through the grape inflorescences or flowers. Weaker and poorly developed inflorescences or flowers are knocked or torn off by the action of the thinning teeth 14 and fall into the internal space of the machine body 1, thereby achieving the purpose of fruit thinning. The top cover 15 is provided on the adjacent side of the two machine bodies 1. The multiple screw holes 16 on the outer wall of the top cover 15 are connected to the machine body 1 with screws, which serves to reinforce the machine body 1. The two handles 3 are fixedly connected to the two rotating seats 18 on the adjacent side of the outer wall. The inner wall of the handle 3 is slidably connected to the connecting shaft 19. The outer wall of the connecting shaft 19 is also slidably connected to the spring 20. When the operator operates the handle 3, the two machine bodies 1 rotate around the connecting shaft 19 as the center. The spring 20 plays the role of buffering and restoring, making the operator more comfortable and flexible during operation.

[0040] Furthermore, when the fruit thinner enters the closed state, the screws 202 on the outer wall of the machine body 1 that are not fixed to the limit bar 204 slide in the limit groove 206 on the front side of the outer wall of the limit bar 204. As the machine body 1 gradually approaches, the distance the screws 202 move in the limit groove 206 also increases. When the screws 202 slide to the limit position of the limit groove 206, they prevent the machine body 1 from continuing to approach, thereby limiting the maximum degree of closure of the fruit thinner and avoiding unnecessary damage to the grapevines due to excessive closure. When the operator releases the handle 3, the spring 20 returns to its original position, and the two machine bodies 1 begin to open. At this time, the screws 202 on the outer wall of the front machine body 1 slide in the opposite direction in the limit groove 206. When they slide to the limit position of the limit groove 206, they limit the machine body 1 from continuing to open, ensuring that the fruit thinner will not open excessively and affect the stability and accuracy of the operation.

[0041] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A grape vine fruit thinning machine of the Zhi Shuo brand, comprising two machine bodies (1), characterized in that: The outer wall of two machine bodies (1) is fixedly connected with handles (3), the inner wall of two handles (3) is fixedly connected with two partitions (4), the adjacent side of two partitions (4) on the same side is provided with a motor (5), the output end of two motors (5) is fixedly connected with a transmission shaft (6), the outer wall of two transmission shafts (6) is fixedly connected with a transmission plate (7), the outer wall of two transmission plates (7) is fixedly connected with a drive shaft (8), the outer wall of two drive shafts (8) is rotatably connected with a drive plate (9), the outer wall of two drive plates (9) is fixedly connected with a row plate (10), the inner wall of two row plates (10) is rotatably connected with a plurality of rotating shafts (11), the outer wall of a plurality of rotating shafts (11) is fixedly connected with a rotating plate (12), the inner wall of a plurality of rotating plates (12) is fixedly connected with a sparse shaft (13), the outer wall of a plurality of sparse shafts (13) is fixedly connected with a plurality of sparse teeth (14), the adjacent side of two machine bodies (1) is provided with a top cover (15), the right side of the outer wall of two machine bodies (1) is provided with the same limiting mechanism (2), and the limiting mechanism (2) is used for limiting the opening and closing degree of the fruit picker.

2. The machine according to claim 1, characterized in that: The limiting mechanism (2) comprises two screws (202), the outer walls of two screws (202) are threadedly connected to the right sides of two machine bodies (1) respectively, two pin holes (201) are formed in the left and right sides of the outer wall of two machine bodies (1), the outer walls of two screws (202) are slidably connected with a pin ring (203), the right sides of two machine bodies (1) are provided with the same limiting strip (204), a limiting groove (206) is formed in the front side of the outer wall of the limiting strip (204), and a limiting groove (206) is formed in the front side of the outer wall of the limiting strip (204).

3. The machine according to claim 1, characterized in that: The outer wall of two top covers (15) is provided with a plurality of screw holes (16), and the top of two top covers (15) is provided with a clamping opening (17).

4. The machine according to claim 1, characterized in that: The outer wall of two handles (3) is fixedly connected with two rotating seats (18), and the inner wall of a plurality of rotating seats (18) is slidably connected with the same connecting shaft (19).

5. The machine according to claim 4, characterized in that: The outer wall of the connecting shaft (19) is slidably connected with a spring (20), and the outer wall of two handles (3) is provided with two stress grooves (21).

6. The machine according to claim 1, characterized in that: The inner wall of two machine bodies (1) is slidably connected with a plug (22), and the outer wall of two plugs (22) is fixedly connected with a plurality of sealing rings (23).

7. The machine according to claim 1, characterized in that: The front side of the outer wall of the front machine body (1) is provided with a switch (24), and the switch (24) is electrically connected with the motor (5).

8. The machine according to claim 2, characterized in that: Two mounting holes (25) are formed in the middle of the outer wall of two machine bodies (1), and a cross groove (26) is formed in the right side of the outer wall of two screws (202).

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