Automatic water gap cutting device

Abstract

The utility model discloses an automatic water gap cutting device which comprises a fixing frame and a supporting cross beam arranged at the upper end of the fixing frame, and a plurality of water gap cutting assemblies are arranged on the side edge of the supporting cross beam in the length direction of the supporting cross beam. A four-axis robot is arranged on one side of the fixing frame, and a movable arm of the four-axis robot is provided with a connecting cross rod; two fixed rods are symmetrically installed at the two ends of the connecting cross rod, and movable rods are arranged at the two ends of the fixed rods correspondingly. And a pneumatic clamping jaw is arranged at the lower end of the movable rod. The two symmetrical supporting cross beams are arranged at the upper end of the fixing frame, and the water gap shearing assemblies are arranged on the supporting cross beams, so that a plurality of water gaps on the decorative plate can be simultaneously sheared, and the production efficiency is greatly improved; through the structure that the four-axis robot is matched with the pneumatic clamping jaw and the suction cup, the decorative plate to be sheared can be accurately fixed and positioned, the shearing accuracy and consistency are ensured, and the working efficiency and the machining quality are greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molding part processing, and particularly relates to an automatic gate cutting device. Background Art

[0002] In the fine field of the automotive manufacturing industry, the front door trim of a car, with its important functionality and decorative properties, has increasingly become the core component that demonstrates the beauty and quality of the interior of a car. This component is often manufactured by plastic one-piece injection molding technology, which can efficiently and precisely shape a complex and delicate trim structure. However, during the injection molding process, to improve the injection efficiency and adapt to diverse appearance designs, the use of multiple gates becomes indispensable, which leaves several gates on the finished trim that need to be removed.

[0003] Traditional gate cutting work mainly relies on manual operation, which has significant drawbacks in terms of processing efficiency, labor intensity, and cutting quality, and obviously cannot keep up with the dual pursuit of high efficiency and high quality in modern automotive manufacturing; although some automatic gate cutting devices have emerged on the market, these devices often have a single function and can only process one gate at a time. For decorative parts with multiple gates, multiple operations are required to complete, greatly reducing the production efficiency; more critically, the existing automatic gate cutting devices cannot effectively fix the trim, which not only affects the thoroughness of cutting but may also have an adverse impact on the quality of the trim; in addition, the existing devices generally lack an effective mechanism for recycling cutting waste, resulting in waste scattered everywhere, polluting the environment and the workplace. Summary of the Invention

[0004] The purpose of the utility model is to provide an automatic gate cutting device to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the utility model provides the following technical solutions:

[0006] An automatic gate-cutting device includes a fixed frame and a support crossbeam arranged at the upper end of the fixed frame; there are two support crossbeams which are symmetrically arranged, and both ends of the support crossbeam are fixedly connected to the fixed frame through connecting pieces respectively; a plurality of gate-cutting components are arranged along the length direction on the side of the support crossbeam, and the gate-cutting components are movably connected to the support crossbeam; a four-axis robot is arranged on one side of the fixed frame, and the front end of the movable arm of the four-axis robot extends towards one side of the fixed frame and is provided with a connecting crossbar; two fixing rods are symmetrically installed at both ends of the connecting crossbar, and movable rods are respectively arranged at both ends of the fixing rods; the movable rods are arranged between the two fixing rods, and both ends of the movable rods are movably connected to the fixing rods respectively; right-angle brackets are respectively arranged below both ends of the fixing rods, and the horizontal ends of the right-angle brackets are fixedly connected to the lower ends of the fixing rods; a first waist-shaped hole is opened in the vertical end of the right-angle bracket, and a first adjusting screw is arranged in the first waist-shaped hole; the front end of the first adjusting screw penetrates through the first waist-shaped hole and is fixedly connected with a sucker mounting seat, and a sucker is arranged below the sucker mounting seat; pneumatic grippers are respectively arranged at the lower ends of the movable rod and the connecting crossbar, and the pneumatic grippers are located between the two fixing rods; a conveyor belt is arranged at one end of the fixed frame, and a waste recycling cart is arranged on the side of the conveyor belt.

[0007] Preferably, the gate-cutting component includes a mounting plate, and a fixing hole is opened in the middle of the mounting plate; a pneumatic scissors is arranged in the fixing hole; an opening is arranged at one end of the mounting plate close to the support crossbeam, and the opening penetrates through the mounting plate and communicates with the fixing hole; a first clamping joint and a second clamping joint are respectively arranged on both sides of the opening, and the first clamping joint and the second clamping joint are connected by bolts; a first sliding block is fixedly connected to the front end of the first clamping joint, and the first sliding block is slidably connected to the support crossbeam.

[0008] Preferably, a second waist-shaped hole is opened in the first sliding block in the vertical direction, and a second adjusting screw is arranged in the second waist-shaped hole; a first sliding groove is opened along the length direction on the side of the support crossbeam close to the first sliding block, and the front end of the second adjusting screw penetrates through the second waist-shaped hole and extends into the first sliding groove.

[0009] Preferably, an annular limiting groove is opened on the outer wall of the cylinder body of the pneumatic scissors, and the inner diameter of the annular limiting groove is equivalent to the aperture of the fixing hole.

[0010] Preferably, a rubber pad is arranged along the circumferential direction on the inner wall of the fixing hole.

[0011] Preferably, second sliding blocks are respectively arranged at both ends of the movable rod, and second sliding grooves adapted to the second sliding blocks are opened at the upper ends of the fixing rods.

[0012] Preferably, an internal thread hole is opened in the second sliding block, and a positioning screw is screwed in the internal thread hole; the top end of the positioning screw penetrates through the internal thread hole and abuts against the bottom of the second sliding groove.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows: By arranging two symmetrical support crossbeams at the upper end of the fixed frame and configuring a plurality of nozzle shearing components thereon, the present utility model realizes shearing of a plurality of nozzles on the decorative board simultaneously, thus greatly improving the production efficiency; wherein the nozzle shearing component can conveniently adjust the position of the shearing component through the cooperation of the second adjusting screw and the first sliding groove to adapt to the nozzles of decorative boards with different sizes and positions; the annular limiting groove of the pneumatic scissors and the rubber pad in the fixing hole further enhance the stability and durability of the shearing component; by utilizing the structure of the four-axis robot cooperating with the pneumatic gripper and the suction cup, the decorative board to be sheared can be accurately fixed and positioned, ensuring the accuracy and consistency of shearing, reducing the difficulty and uncertainty of manual operation, and at the same time reducing the incomplete shearing or quality problems caused by unstable fixing; by arranging the waste recycling cart, the sheared nozzle waste can be effectively recycled, avoiding environmental pollution caused by the waste splashing everywhere and facilitating the subsequent treatment of the waste.

[0014] The above description is only an overview of the technical solution of the present utility model. In order to be able to understand the technical means of the present utility model more clearly and implement it according to the content of the specification, the following takes the preferred embodiments of the present utility model and combines with the drawings to elaborate in detail as follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is the structural schematic diagram of the present utility model;

[0016] Figure 2 is the structural schematic diagram of the fixed frame of the present utility model;

[0017] Figure 3 is the structural schematic diagram of the mounting plate of the present utility model;

[0018] Figure 4 is the structural schematic diagram of the pneumatic scissors of the present utility model;

[0019] Figure 5 is the structural schematic diagram of the connection between the fixed rod and the movable rod of the present utility model;

[0020] Figure 6 is Figure 5 the enlarged schematic diagram of the structure at the position A shown.

[0021] Among them: 1. Fixed frame; 2. Support cross beam; 3. Connector; 4. Nozzle shearing assembly; 401. Mounting plate; 402. Fixed hole; 403. Pneumatic scissors; 404. Opening; 405. First clamping joint; 406. Second clamping joint; 407. Bolt; 408. First slider; 5. Four-axis robot; 6. Connecting cross bar; 7. Fixed rod; 8. Movable rod; 9. Right-angle bracket; 10. First waist-shaped hole; 11. First adjusting screw; 12. Suction cup mounting seat; 13. Suction cup; 14. Decorative plate; 15. Pneumatic gripper; 16. Conveyor belt; 17. Scrap recycling cart; 18. Second waist-shaped hole; 19. Second adjusting screw; 20. First sliding groove; 21. Annular limiting groove; 22. Rubber pad; 23. Second slider; 24. Second sliding groove; 25. Internal thread hole; 26. Positioning screw. Detailed implementation mode

[0022] The following further elaborates on the present utility model in conjunction with the attached drawings.

[0023] Please refer to Figures 1 to 6 For achieving the above objectives, the present utility model provides the following technical solutions:

[0024] An automatic gate shearing device includes a fixed frame 1 and a support crossbeam 2 arranged at the upper end of the fixed frame 1; there are two support crossbeams 2 which are symmetrically arranged. The two ends of the support crossbeam 2 are respectively fixedly connected to the fixed frame 1 through connectors 3, and the support crossbeam 2 provides a stable support structure for the whole device; a plurality of gate shearing components 4 are arranged along the length direction on the side of the support crossbeam 2. The gate shearing components 4 are movably connected to the support crossbeam 2, facilitating position adjustment according to needs; a four-axis robot 5 is arranged on one side of the fixed frame 1. The front end of the movable arm of the four-axis robot 5 extends towards one side of the fixed frame 1 and is provided with a connecting crossbar 6; two fixing rods 7 are symmetrically installed at both ends of the connecting crossbar 6. The two ends of the fixing rod 7 are respectively provided with movable rods 8; the movable rods 8 are arranged between the two fixing rods 7, and the two ends of the movable rod 8 are respectively movably connected to the fixing rods 7; right-angle brackets 9 are respectively arranged below the two ends of the fixing rod 7. The horizontal end of the right-angle bracket 9 is fixedly connected to the lower end of the fixing rod 7; a first waist-shaped hole 10 is opened in the vertical end of the right-angle bracket 9, and a first adjusting screw 11 is arranged in the first waist-shaped hole 10; the front end of the first adjusting screw 11 penetrates through the first waist-shaped hole 10 and is fixedly connected to a suction cup mounting seat 12. A suction cup 13 is arranged below the suction cup mounting seat 12, and the suction cup 13 is used for adsorbing and fixing the decorative board 14 to prevent the decorative board 14 from shifting during shearing; pneumatic grippers 15 are respectively arranged at the lower ends of the movable rod 8 and the connecting crossbar 6. The pneumatic grippers 15 are located between the two fixing rods 7, and the pneumatic grippers 15 are used for clamping the gates on the decorative board 14 to be processed. Through the clamping cooperation between the pneumatic grippers 15 and the gates, on the one hand, it is beneficial to further improve the stability of the decorative board 14, and on the other hand, it prevents the sheared gates from splashing everywhere; a conveyor belt 16 is arranged at one end of the fixed frame 1, and a waste recycling cart 17 is arranged on the side of the conveyor belt 16.

[0025] In use, first, control the four-axis robot 5 to drive the fixed rod 7 to move, so that the fixed rod 7 drives the suction cup 13 arranged below it to move above the decorative panel 14 to be sheared. Then, control the suction cup 13 to move downward and adsorb the surface of the decorative panel 14. At the same time, control the pneumatic gripper 15 to clamp and fix the sprue of the decorative panel 14. Next, control the four-axis robot 5 to drive the decorative panel 14 to move above the fixing frame 1. When the decorative panel 14 is accurately fixed at the predetermined position, the sprue shearing assembly 4 on the support crossbeam 2 will perform a shearing operation on it and process multiple sprues on the decorative panel 14 at the same time. After shearing, the four-axis robot 5 transports the sheared decorative panel 14 above the conveyor belt 16 and controls the suction cup 13 to release the adsorption of the decorative panel 14, so that the decorative panel 14 falls onto the conveyor belt 16. Subsequently, it can be conveyed to the next processing link through the conveyor belt 16. Then, drive the four-axis robot 5 again to control the movable arm to move above the waste recycling cart 17. Next, control the pneumatic gripper 15 to open, so that the sheared sprues automatically fall into the waste recycling cart 17, which is convenient for centralized treatment and recycling. The whole device greatly improves the efficiency and accuracy of sprue shearing through automated and precise mechanical operations, while reducing manual intervention and waste treatment costs.

[0026] Please refer to Figures 2 to 4 , as an embodiment of the present utility model, the sprue shearing assembly 4 includes a mounting plate 401. A fixing hole 402 is formed in the middle of the mounting plate 401, and a pneumatic scissors 403 is arranged in the fixing hole 402. One end of the mounting plate 401 close to the support crossbeam 2 is provided with an opening 404, and the opening 404 penetrates through the mounting plate 401 and communicates with the fixing hole 402. A first clamping joint 405 and a second clamping joint 406 are respectively arranged on both sides of the opening 404, and the first clamping joint 405 and the second clamping joint 406 are connected by a bolt 407. The front end of the first clamping joint 405 is fixedly connected with a first sliding block 408, and the first sliding block 408 is slidably connected with the support crossbeam 2. A second waist-shaped hole 18 is formed in the first sliding block 408 in the vertical direction, and a second adjusting screw 19 is arranged in the second waist-shaped hole 18. A first sliding groove 20 is formed on one side of the support crossbeam 2 close to the first sliding block 408 along its length direction, and the front end of the second adjusting screw 19 penetrates through the second waist-shaped hole 18 and extends into the first sliding groove 20.

[0027] In the above-described solution, a fixing hole 402 is provided in the middle of the mounting plate 401. The fixing hole 402 provides a space for the installation and fixation of the pneumatic scissors 403. The pneumatic scissors 403 is the core component of the gate shearing assembly 4. The pneumatic scissors 403 realizes the opening and closing of the blade through pneumatic drive. The pneumatic system can provide fast, accurate and repeatable control to ensure the accuracy and consistency of the gate cutting operation. When it is necessary to cut the gate, the pneumatic scissors 403 will start, and use its sharp blade to quickly and accurately cut the gate. After the cutting is completed, the pneumatic scissors 403 will reset and wait for the next cutting instruction. The pneumatic scissors 403 has different sizes and shapes to adapt to the gate cutting requirements of different positions and shapes.

[0028] Further, an opening 404 is provided at one end of the mounting plate 401 close to the support cross beam 2. The opening 404 is communicated with the fixing hole 402, which allows the pneumatic scissors 403 to be conveniently inserted into and taken out of the fixing hole 402. A first clamping joint 405 and a second clamping joint 406 are respectively provided on both sides of the opening 404. The first clamping joint 405 is longer than the second clamping joint 406 so as to form a stable connection when closed. The first clamping joint 405 and the second clamping joint 406 are tightly connected by a bolt 407. When the bolt 407 is tightened, the opening 404 of the mounting plate 401 will close, so that the fixing hole 402 tightly clamps the pneumatic scissors 403 to ensure the stability of the installation of the pneumatic scissors 403. A first slider 408 is fixedly connected to the front end of the first clamping joint 405. The first slider 408 is slidably connected to the support cross beam 2. This design allows the gate shearing assembly 4 to easily slide on the support cross beam 2 to facilitate the adjustment of the shearing position of the pneumatic scissors 403.

[0029] A second waist-shaped hole 18 is provided in the first slider 408 in the vertical direction. A second adjusting screw 19 is provided in the second waist-shaped hole 18. By rotating the second adjusting screw 19, the position of the gate shearing assembly 4 in the vertical direction can be finely adjusted to adapt to gates of different heights. A first chute 20 is provided along the length direction on one side of the support cross beam 2 close to the first slider 408. The front end of the second adjusting screw 19 passes through the second waist-shaped hole 18 and extends into the first chute 20. This structure enables the gate shearing assembly 4 not only to slide on the support cross beam 2, but also to perform fine vertical position adjustment through the second adjusting screw 19. The gate shearing assembly 4 performs the shearing operation through the pneumatic scissors 403 on the mounting plate 401, and at the same time uses the first slider 408 and the second adjusting screw 19 to realize the position adjustment and fine adjustment on the support cross beam 2 to meet the gate shearing requirements of different sizes and positions. This design makes the gate shearing assembly 4 both flexible and accurate, greatly improving the shearing efficiency and accuracy.

[0030] Please refer to Figure 3 、Figure 4 As an embodiment of the utility model, the pneumatic scissors 403 include long-blade scissors equipped with long-blade blades and short-blade scissors equipped with short-blade blades. The outer wall of the cylinder body of the pneumatic scissors 403 is provided with an annular limiting groove 21, wherein the inner diameter of the annular limiting groove 21 is equivalent to the aperture of the fixing hole 402; the inner wall of the fixing hole 402 is provided with a rubber pad 22 along its circumference, wherein the rubber pad 22 is adapted to the annular limiting groove 21.

[0031] In the above-described scheme, the outer wall of the cylinder body of the pneumatic scissors 403 is designed with an annular limit groove 21, wherein the inner diameter of the annular limit groove 21 matches the aperture of the fixing hole 402. In order to increase the stability of the pneumatic scissors 403 and reduce vibration, a rubber pad 22 is provided along the circumference of the inner wall of the fixing hole 402. The cylinder body of the pneumatic scissors 403 is firmly installed in the fixing hole 402 through the cooperation of the annular limit groove 21 and the rubber pad 22. This design ensures that the pneumatic scissors 403 will not shake or shift during operation, thereby improving the accuracy and stability of shearing.

[0032] Furthermore, the long-blade scissors are used to cut larger or thicker material parts. Due to their longer blades, the pneumatic scissors 403 can cut more materials in a single operation, thereby improving work efficiency. In the water outlet cutting operation of the decorative panel 14, the long-blade scissors are used to cut the main, larger water outlet parts; the short-blade scissors are used for more delicate or smaller cutting tasks. Due to their shorter blades, the pneumatic scissors 403 can more accurately control the cutting position and depth, avoiding excessive damage to the surrounding materials; through the cooperation of two pneumatic scissors with different blades, the water outlet cutting operation of the decorative panel 14 is both efficient and delicate, and also meets the water outlet cutting requirements of different shapes and sizes; the pneumatic scissors 403 realizes efficient and accurate cutting functions through its special structure and design. During use, the operator only needs simple operations to easily complete various cutting tasks, greatly improving work efficiency and processing quality.

[0033] Please refer to Figure 5 , Figure 6 As an embodiment of the utility model, second sliders 23 are respectively provided at both ends of the movable rod 8, wherein a second slide groove 24 adapted to the second slider 23 is opened at the upper end of the fixed rod 7; an internal threaded hole 25 is opened on the second slider 23, wherein a positioning screw 26 is threadedly connected to the internal threaded hole 25, and the top end of the positioning screw 26 passes through the internal threaded hole 25 and abuts against the bottom of the second slide groove 24.

[0034] In the above-described solution, the movable rod 8 freely slides through the second sliders 23 at both ends in the second chute 24 of the fixed rod 7. This design enables the movable rod 8 to move flexibly within a certain range. When it is necessary to fix the position of the movable rod 8, the positioning screw 26 can be rotated so that its top abuts against the bottom of the second chute 24, thereby generating frictional force to prevent the second slider 23 from moving in the second chute 24, and further fixing the position of the movable rod 8. Since the positioning screw 26 and the second slider 23 are threadedly connected, the abutting force of the positioning screw 26 against the bottom of the second chute 24 can be adjusted by rotating the positioning screw 26, thereby controlling the fixing tightness of the movable rod 8. Through the mutual cooperation of the movable rod 8, the fixed rod 7, the second slider 23, and the positioning screw 26, functions such as the flexible sliding, precise positioning, and tightness adjustment of the movable rod 8 are achieved, thereby ensuring that the movable rod 8 drives the pneumatic gripper 15 to precisely clamp and fix the sprue of the decorative panel 14, and further improving the stability of the decorative panel 14 during sprue shearing, greatly improving the working efficiency and processing quality.

[0035] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article or device including the said element.

[0036] Finally, it should be noted that the above-described embodiments are only specific embodiments of the present invention, used to illustrate the technical solutions of the present invention, rather than limiting it. The protection scope of the present invention is not limited thereto. Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: any person skilled in the art within the technical scope disclosed by the present invention can still modify the technical solutions recorded in the foregoing embodiments or can easily think of changes, or perform equivalent substitution on some of the technical features; and these modifications, changes or substitutions do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. An automatic water-cutting device, comprising a fixing frame (1) and a supporting beam (2) arranged at the upper end of the fixing frame (1); characterized in that: The supporting crossbeams (2) are provided with two and are symmetrically arranged, wherein the two ends of the supporting crossbeams (2) are respectively fixedly connected to the fixed frame (1) through connecting pieces (3); a plurality of nozzle shearing assemblies (4) are provided on the side of the supporting crossbeam (2) along its length direction, wherein the nozzle shearing assemblies (4) are movably connected to the supporting crossbeam (2); a four-axis robot (5) is provided on one side of the fixed frame (1), wherein the front end of the movable arm of the four-axis robot (5) extends toward one side of the fixed frame (1) and is provided with a connecting crossbar (6); two fixing rods (7) are symmetrically installed at both ends of the connecting crossbar (6), wherein movable rods (8) are respectively provided at both ends of the fixing rod (7); right-angle brackets (9) are respectively provided below the two ends of the fixing rod (7), The horizontal end of the right-angle bracket (9) is fixedly connected to the lower end of the fixed rod (7); the vertical end of the right-angle bracket (9) is provided with a first waist hole (10), wherein a first adjusting screw (11) is arranged in the first waist hole (10); the front end of the first adjusting screw (11) passes through the first waist hole (10) and is fixedly connected to a suction cup mounting seat (12), wherein a suction cup (13) is arranged below the suction cup mounting seat (12); the lower end of the movable rod (8) and the lower end of the connecting cross bar (6) are respectively provided with pneumatic clamps (15), wherein the pneumatic clamps (15) are located between the two fixed rods (7); a conveyor belt (16) is provided at one end of the fixed frame (1), wherein a waste recycling vehicle (17) is arranged on the side of the conveyor belt (16).

2. The automatic water cutting device according to claim 1, characterized in that: The water inlet shearing assembly (4) comprises a mounting plate (401), wherein a fixing hole (402) is provided in the middle of the mounting plate (401); a pneumatic scissors (403) is provided in the fixing hole (402); an opening (404) is provided at one end of the mounting plate (401) close to the supporting beam (2), wherein the opening (404) passes through the mounting plate (401) and is connected to the fixing hole (402); a first clamping joint (405) and a second clamping joint (406) are provided on both sides of the opening (404), wherein the first clamping joint (405) and the second clamping joint (406) are connected by bolts (407); a first slider (408) is fixedly connected to the front end of the first clamping joint (405), wherein the first slider (408) is slidably connected to the supporting beam (2).

3. The automatic water cutting device according to claim 2, characterized in that: The first sliding block (408) is provided with a second waist hole (18) in the vertical direction, wherein a second adjusting screw (19) is provided in the second waist hole (18); the supporting crossbeam (2) is provided with a first sliding groove (20) along its length direction on the side close to the first sliding block (408), wherein the front end of the second adjusting screw (19) passes through the second waist hole (18) and extends into the first sliding groove (20).

4. The automatic water cut device according to claim 2, characterized in that: An annular limiting groove (21) is provided on the outer wall of the cylinder body of the pneumatic scissors (403), wherein the inner diameter of the annular limiting groove (21) is equivalent to the hole diameter of the fixing hole (402).

5. The automatic water cutting device according to claim 4, characterized in that: The inner wall of the fixing hole (402) is provided with a rubber pad (22) along its circumference.

6. The automatic water-cutting device according to claim 1, characterized in that: The two ends of the movable rod (8) are respectively provided with second sliding blocks (23), wherein the upper end of the fixed rod (7) is provided with a second sliding groove (24) adapted to the second sliding block (23).

7. An automatic water cut device according to claim 6, characterized in that: The second sliding block (23) is provided with an internal threaded hole (25), wherein a positioning screw (26) is threadedly connected to the internal threaded hole (25); the top end of the positioning screw (26) passes through the internal threaded hole (25) and abuts against the bottom of the second sliding groove (24).

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