Crosshead and locking piston rod locking structure

Abstract

The application discloses a locking and anti-loosening structure of a cross head and a locking piston rod, and aims to solve the inconvenience of anti-loosening operation between a locking piston rod and a locking nut. The locking piston rod is connected with the locking nut, the locking piston rod and the locking nut are connected with a rotatable anti-loosening block at corresponding positions, and the anti-loosening block extends out of the outer wall of the locking piston rod at the bottom end; during the process of screwing the locking nut to the locking piston rod, the locking nut is pushed to the bottom end of the anti-loosening block to make the anti-loosening block deflect, and then the top end of the anti-loosening block is abutted to the inner wall of the locking nut to realize anti-loosening. The whole anti-loosening operation process does not exist the operation of drilling a hole for a split screw, has no requirement on the space between a movable die plate and a rear die plate, can conveniently realize the anti-loosening operation between the locking piston rod and the locking nut, and has good anti-loosening effect.

Description

Technical Field

[0001] This invention relates to the technical field of locking structure for elbow lever machines, and more specifically, to a locking and anti-loosening structure for a crosshead and a locking piston rod. Background Technology

[0002] Currently, in the clamping mechanism of the toggle lever machine, the crosshead and clamping piston rod are usually fixed by a lock nut, and loosening is prevented by a slab screw in the gap between the end faces of the clamping piston rod and the lock nut. However, due to insufficient space between the moving platen and the rear platen of small machines such as DT130 and below, drilling holes for the slab screw is difficult, which causes inconvenience to the anti-loosening of the clamping piston rod and the lock nut. Summary of the Invention

[0003] To overcome the above shortcomings, the present invention provides a locking and anti-loosening structure for the crosshead and the locking piston rod, which can conveniently realize the anti-loosening operation between the locking piston rod and the locking nut, and has a good anti-loosening effect.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a locking and anti-loosening structure for a crosshead and a locking piston rod, wherein a locking nut is connected to the locking piston rod, and a rotatable anti-loosening block is connected to the locking piston rod at a position corresponding to the locking nut, and the bottom end of the anti-loosening block extends out of the outer wall of the locking piston rod; during the process of tightening the locking nut to the locking piston rod, the locking nut pushes against the bottom end of the anti-loosening block, causing the anti-loosening block to deflect, thereby causing the top end of the anti-loosening block to abut against the inner wall of the locking nut to achieve anti-loosening.

[0005] The locking piston rod in the locking cylinder assembly and the crosshead in the template connecting rod assembly are fixedly connected by a locking nut. When the locking piston rod moves linearly, it drives the crosshead to move linearly, thereby opening and closing the mold. To achieve a locking and anti-loosening structure between the locking piston rod and the crosshead, a locking and anti-loosening structure is designed. This structure includes an anti-loosening block that can deflect, with its bottom end extending beyond the outer wall of the locking piston rod. During the tightening of the locking nut onto the locking piston rod, the locking nut pushes against the bottom end of the anti-loosening block, causing it to deflect and thus the top end of the anti-loosening block abuts against the inner wall of the locking nut, achieving anti-loosening. The entire anti-loosening operation eliminates the need for drilling holes for the bolts, requires no space between the moving template and the rear template, and easily achieves anti-loosening operation between the locking piston rod and the locking nut, with excellent anti-loosening effect.

[0006] Preferably, the outer wall of the locking piston rod is provided with a mounting groove corresponding to the anti-loosening block, and the anti-loosening block is installed in the mounting groove.

[0007] The mounting groove on the outer wall of the locking piston rod facilitates the installation of the anti-loosening block. Except for its bottom portion extending into the mounting groove, the rest of the anti-loosening block is concealed within it, preventing interference from other parts of the anti-loosening block with the locking nut during tightening. When the locking nut contacts the outward-extending bottom of the anti-loosening block, and the nut is tightened, the anti-loosening block is pushed and deflected, causing its top to abut against the inner wall of the locking nut, thus preventing loosening.

[0008] Preferably, the bottom and top outer walls of the anti-loosening block are provided with several anti-loosening grooves.

[0009] The anti-loosening groove design allows for a tighter engagement between the outer wall of the anti-loosening block and the inner wall of the locking nut, thereby improving the anti-loosening effect.

[0010] Preferably, the anti-loosening block includes an ejector rotating block and a locking rotating block. The bottom outer wall of the ejector rotating block protrudes from the outer wall of the locking piston rod. The ejector rotating block and the locking rotating block are rotatably connected together, and an ejector block is installed between the ejector rotating block and the locking rotating block.

[0011] The anti-loosening block consists of a rotatable ejector block and a locking block. When the locking nut is tightened, the locking nut contacts the ejector block, causing it to deflect inward. The ejector block then contacts the ejector block. As the ejector block deflects inward, it moves outward. When the ejector block contacts the locking block, it applies a force to the locking block, causing it to deflect outward. This causes the locking block to engage with the locking nut threads, thus preventing loosening.

[0012] Preferably, the outer wall of the ejector block is inclined.

[0013] The outer wall of the ejector block is inclined so that the bottom of the ejector block can extend out of the outer wall of the mold locking piston rod, while other positions will not extend out of the outer wall of the mold locking piston rod, thus avoiding interference with the tightening process of the locking nut.

[0014] Preferably, the ejector block is provided with a protrusion and a support surface is provided on the protrusion; the locking block is provided with a top hook, one end of the ejector block is supported on the support surface, and the other end of the ejector block is supported on the top hook.

[0015] The ejector block is supported between the support surface and the top hook. During the deflection of the ejector block, it can push the ejector block to move outward, thereby pushing the locking block to deflect outward to prevent loosening.

[0016] Preferably, the support surface is inclined, and the edge of the support surface contacts the ejector block; the surface of the ejector hook facing the ejector block is inclined from the outside to the inside and towards the ejector block, and the edge of the ejector hook contacts the ejector block.

[0017] The inclined support surface facilitates the outward movement of the ejector block when it deflects inward. The inclined hook surface also helps the outward movement of the ejector block to deflect the locking block outward, thus preventing loosening.

[0018] Preferably, mounting holes are provided on the mold locking piston rod corresponding to the ejector block, and the ejector block is installed in the mounting holes and can move axially.

[0019] The mounting holes facilitate the installation of the ejector block.

[0020] Another option is to use a long, integrated anti-loosening block with the outer wall of the block inclined outward from the middle to both ends.

[0021] The anti-loosening block is a long strip structure. When the bottom is pushed inward, its top deflects outward, thus abutting against the inner wall of the locking nut to prevent loosening.

[0022] Preferably, a boss is provided on the mold-locking piston rod, a positioning ring is installed on the boss, a connecting hole is provided on the crosshead, the front end of the mold-locking piston rod passes through the connecting hole, the positioning ring is fitted to the surface of the crosshead on one side of the connecting hole, a countersunk hole is provided on the other side of the connecting hole, and the locking nut is placed in the countersunk hole.

[0023] After the locking piston rod is connected to the crosshead, the crosshead is positioned between the boss and the lock nut, ensuring a reliable connection. The countersunk hole provides space for the lock nut to be accommodated.

[0024] Compared with the prior art, the beneficial effects of the present invention are: the anti-loosening operation between the locking piston rod and the locking nut is convenient and the anti-loosening effect is good. Attached Figure Description

[0025] Figure 1 This is an assembly diagram of the crosshead and the mold-locking piston rod of the present invention;

[0026] Figure 2 This is a schematic diagram of the locking and anti-loosening structure of the present invention;

[0027] Figure 3 This is a schematic diagram of the mold-locking piston rod of the present invention;

[0028] Figure 4 This is a schematic diagram of the anti-loosening block according to Embodiment 1 of the present invention;

[0029] Figure 5 This is a cross-sectional view of the connection between the mold-locking piston rod and the locking nut in Embodiment 1 of the present invention;

[0030] Figure 6 This is a partial sectional view of the connection between the mold-locking piston rod and the locking nut in Embodiment 2 of the present invention;

[0031] Figure 7This is a cross-sectional view of the connection between the mold-locking piston rod and the locking nut in Embodiment 3 of the present invention;

[0032] In the diagram: 1. Crosshead, 2. Mold locking piston rod, 3. Locking nut, 4. Boss, 5. Positioning ring, 6. Connecting hole, 7. Countersunk hole, 8. Anti-loosening block, 9. Mold locking cylinder, 10. Piston, 11. End cap, 12. Oil hole, 13. Limiting ring, 14. Sealing ring, 15. Flange, 16. Connecting seat, 17. Mounting groove, 18. Ejection rotating block, 19. Locking rotating block, 20. Connecting groove, 21. Connecting tongue, 22. Rotating pin, 23. Mounting hole, 24. Protrusion, 25. Support surface, 26. Top hook, 27. Bottom block, 28. Adjusting block, 29. Rotary handle, 30. Rotating shaft, 31. Ejection block, 32. Anti-loosening tooth groove. Detailed Implementation

[0033] The technical solution of the present invention will be further described in detail below through specific embodiments and in conjunction with the accompanying drawings:

[0034] Example 1: A locking and anti-loosening structure for a crosshead and a mold-locking piston rod (see attached diagram) Figure 1 To be continued Figure 5 A locking nut 3 is connected to the locking piston rod 2. The outer wall of the locking piston rod 2 has an external thread, and the locking nut 3 has an internal thread. When the locking nut 3 is connected to the locking piston rod 2, the internal and external threads fit together to achieve locking. A boss 4 is provided on the locking piston rod 2, and a positioning ring 5 is installed at the boss 4. A connecting hole 6 is provided on the crosshead 1. The front end of the locking piston rod 2 passes through the connecting hole 6. The positioning ring 5 fits against the surface of the crosshead 1 on one side of the connecting hole 6. A countersunk hole 7 is provided on the other side of the connecting hole 6, and the locking nut 3 is placed in the countersunk hole 7.

[0035] Two rotatable anti-loosening blocks 8 are evenly distributed around the circumference of the locking piston rod 2 and the locking nut 3. The bottom end of the anti-loosening block 8 extends out of the outer wall of the locking piston rod 2. When the locking nut 3 is tightened onto the locking piston rod 2, the locking nut 3 pushes against the bottom end of the anti-loosening block 8, causing the anti-loosening block 8 to deflect, and then the top end of the anti-loosening block 8 abuts against the inner wall of the locking nut 3 to achieve anti-loosening.

[0036] The mold-locking piston rod 2 is connected to the mold-locking cylinder 9, thus forming the mold-locking cylinder 9 assembly. A piston 10 is connected to the mold-locking piston rod 2, and the piston 10 is fitted into the mold-locking cylinder 9. One end of the mold-locking cylinder 9 is connected to an end cap 11, which has an oil hole 12. The other end of the mold-locking cylinder 9 is connected to a limiting ring 13 and a sealing ring 14. A flange 15 is provided at the end of the sealing ring 14, and the flange 15 is tightly connected between the limiting ring 13 and the mold-locking cylinder 9. Both the limiting ring 13 and the sealing ring 14 are sealed and fitted with the mold-locking piston rod 2. A connecting seat 16 is installed on the outer wall of the mold-locking cylinder 9 at the corresponding position of the limiting ring 13. When the mold-locking cylinder 9 drives the piston 10 rod to move linearly, it will drive the crosshead 1 to move linearly, thereby realizing the opening and closing of the mold.

[0037] The locking nut 3 is installed at the end of the locking piston rod 2. Two mounting grooves 17 are provided on the outer wall of the end of the locking piston rod 2, corresponding to the anti-loosening block 8. The anti-loosening block 8 is installed in the mounting grooves 17. The mounting grooves 17 on the outer wall of the locking piston rod 2 facilitate the installation of the anti-loosening block 8. Except for the bottom portion extending into the mounting groove 17, the other parts of the anti-loosening block 8 are hidden within the mounting groove 17, preventing interference from other parts of the anti-loosening block 8 with the locking nut 3 during tightening. After the locking nut 3 contacts the outwardly protruding bottom of the anti-loosening block 8, the locking nut 3 is quickly tightened, pushing and deflecting the anti-loosening block 8, causing its top to abut against the inner wall of the locking nut 3, thus preventing loosening. Several anti-loosening grooves 32 are provided on both the bottom and top outer walls of the anti-loosening block 8. The anti-loosening grooves 32 ensure a tighter engagement between the outer wall of the anti-loosening block 8 and the inner wall of the locking nut 3, thereby improving the anti-loosening effect.

[0038] The anti-loosening block 8 includes an ejector rotating block 18 and a locking rotating block 19. The bottom outer wall of the ejector rotating block 18 protrudes from the outer wall of the locking piston rod 2. The ejector rotating block 18 and the locking rotating block 19 are rotatably connected together. A connecting groove 20 is provided at the end of the ejector rotating block 18, and a connecting tongue 21 is provided at the end of the locking rotating block 19. The connecting tongue 21 is inserted into the connecting groove 20 and can rotate within the connecting groove 20. A rotating pin 22 is connected to the ejector rotating block 18, and the connecting tongue 21 is rotatably connected to the rotating pin 22, thereby allowing the connecting tongue 21 to rotate around the rotating pin 22. The opposite end faces of the ejector rotating block 18 and the locking rotating block 19 are both arc-shaped. An ejector block 31 is installed between the ejector rotating block 18 and the locking rotating block 19. A mounting hole 23 is provided on the locking piston rod 2 corresponding to the ejector block 31. The ejector block 31 is installed in the mounting hole 23 and can move axially.

[0039] The anti-loosening block 8 consists of a rotatable ejector block 18 and a locking block 19. When the locking nut 3 is rotated and tightened, the locking nut 3 contacts the ejector block 18, causing the ejector block 18 to deflect inward. The ejector block 31 then contacts the ejector block 18. When the ejector block 18 deflects inward, it will drive the ejector block 31 to move outward. When the ejector block 31 contacts the locking block 19, it will apply a force to the locking block 19, causing the locking block 19 to deflect outward. This will cause the locking block 19 to engage with the locking nut 3, thus preventing loosening.

[0040] The outer wall of the ejector block 18 is inclined, thus forming a wedge-shaped structure that is wider on the inside and narrower on the outside. A protrusion 24 is provided on the ejector block 18, and a support surface 25 is provided on the protrusion 24. A hook 26 is provided on the locking block 19. One end of the ejector block 31 is supported on the support surface 25, and the other end of the ejector block 31 is supported on the hook 26. The support surface 25 is inclined, and its edge contacts the ejector block 31. The hook 26 is inclined towards the surface of the ejector block 31 from the outside inwards towards the ejector block 31, and its edge contacts the ejector block 31.

[0041] The outer wall of the ejector block 18 is inclined, allowing its bottom to extend beyond the outer wall of the locking piston rod 2, while other parts of the ejector block 18 do not extend beyond the outer wall of the locking piston rod 2, thus avoiding interference with the tightening process of the locking nut 3. The ejector block 31 is supported between the support surface 25 and the ejector hook 26. During the deflection of the ejector block 18, the ejector block 31 can be pushed outward, thereby pushing the locking block 19 outward to prevent loosening. The inclined support surface 25 facilitates the outward movement of the ejector block 31 when the ejector block 18 deflects inward. The inclined surface of the ejector hook 26 facilitates the outward movement of the ejector block 31, pushing the locking block 19 outward to prevent loosening.

[0042] The locking piston rod 2 in the locking cylinder 9 assembly is fixedly connected to the crosshead 1 in the template connecting rod assembly via a locking nut 3. When the locking piston rod 2 moves linearly, it drives the crosshead 1 to move linearly, thereby opening and closing the mold. To achieve locking and anti-loosening between the locking piston rod 2 and the crosshead 1, a locking and anti-loosening structure is designed. This locking and anti-loosening structure is designed with an anti-loosening block 8, which can deflect, and the bottom end of the anti-loosening block 8 extends out of the outer wall of the locking piston rod 2. During the process of tightening the locking nut 3 onto the locking piston rod 2, the locking nut 3 pushes against the bottom end of the anti-loosening block 8, causing the anti-loosening block 8 to deflect, and then the top end of the anti-loosening block 8 abuts against the inner wall of the locking nut 3 to achieve anti-loosening. The entire anti-loosening operation does not require drilling of the screws across the seam, and there are no space requirements between the moving template and the rear template. It can easily achieve the anti-loosening operation between the locking piston rod 2 and the locking nut 3, and the anti-loosening effect is good.

[0043] Example 2: A locking and anti-loosening structure for a crosshead and a mold-locking piston rod (see attached diagram) Figure 6 A locking nut 3 is connected to the locking piston rod 2. The outer wall of the locking piston rod 2 has an external thread, and the locking nut 3 has an internal thread. When the locking nut 3 is connected to the locking piston rod 2, the internal and external threads fit together to achieve locking. A boss 4 is provided on the locking piston rod 2, and a positioning ring 5 is installed at the boss 4. A connecting hole 6 is provided on the crosshead 1. The front end of the locking piston rod 2 passes through the connecting hole 6. The positioning ring 5 fits against the surface of the crosshead 1 on one side of the connecting hole 6. A countersunk hole 7 is provided on the other side of the connecting hole 6, and the locking nut 3 is placed in the countersunk hole 7.

[0044] Two rotatable anti-loosening blocks 8 are evenly distributed around the circumference of the locking piston rod 2 and the locking nut 3. The bottom end of the anti-loosening block 8 extends out of the outer wall of the locking piston rod 2. When the locking nut 3 is tightened onto the locking piston rod 2, the locking nut 3 pushes against the bottom end of the anti-loosening block 8, causing the anti-loosening block 8 to deflect, and then the top end of the anti-loosening block 8 abuts against the inner wall of the locking nut 3 to achieve anti-loosening.

[0045] The mold-locking piston rod 2 is connected to the mold-locking cylinder 9, thus forming the mold-locking cylinder 9 assembly. A piston 10 is connected to the mold-locking piston rod 2, and the piston 10 is fitted into the mold-locking cylinder 9. One end of the mold-locking cylinder 9 is connected to an end cap 11, which has an oil hole 12. The other end of the mold-locking cylinder 9 is connected to a limiting ring 13 and a sealing ring 14. A flange 15 is provided at the end of the sealing ring 14, and the flange 15 is tightly connected between the limiting ring 13 and the mold-locking cylinder 9. Both the limiting ring 13 and the sealing ring 14 are sealed and fitted with the mold-locking piston rod 2. A connecting seat 16 is installed on the outer wall of the mold-locking cylinder 9 at the corresponding position of the limiting ring 13. When the mold-locking cylinder 9 drives the piston 10 rod to move linearly, it will drive the crosshead 1 to move linearly, thereby realizing the opening and closing of the mold.

[0046] The locking nut 3 is installed at the end of the locking piston rod 2. Two mounting grooves 17 are provided on the outer wall of the end of the locking piston rod 2, corresponding to the anti-loosening block 8. The anti-loosening block 8 is installed in the mounting grooves 17. The mounting grooves 17 on the outer wall of the locking piston rod 2 facilitate the installation of the anti-loosening block 8. Except for the bottom portion extending into the mounting groove 17, the other parts of the anti-loosening block 8 are hidden within the mounting groove 17, preventing interference from other parts of the anti-loosening block 8 with the locking nut 3 during tightening. After the locking nut 3 contacts the outwardly protruding bottom of the anti-loosening block 8, the locking nut 3 is quickly tightened, pushing and deflecting the anti-loosening block 8, causing its top to abut against the inner wall of the locking nut 3, thus preventing loosening. Several anti-loosening grooves 32 are provided on both the bottom and top outer walls of the anti-loosening block 8. The anti-loosening grooves 32 ensure a tighter engagement between the outer wall of the anti-loosening block 8 and the inner wall of the locking nut 3, thereby improving the anti-loosening effect.

[0047] The anti-loosening block 8 includes an ejector rotating block 18 and a locking rotating block 19. The bottom outer wall of the ejector rotating block 18 protrudes from the outer wall of the locking piston rod 2. The ejector rotating block 18 and the locking rotating block 19 are rotatably connected together. A connecting groove 20 is provided at the end of the ejector rotating block 18, and a connecting tongue 21 is provided at the end of the locking rotating block 19. The connecting tongue 21 is inserted into the connecting groove 20 and can rotate within the connecting groove 20. A rotating pin 22 is connected to the ejector rotating block 18, and the connecting tongue 21 is rotatably connected to the rotating pin 22, thereby allowing the connecting tongue 21 to rotate around the rotating pin 22. The opposite end faces of the ejector rotating block 18 and the locking rotating block 19 are both arc-shaped. An ejector block 31 is installed between the ejector rotating block 18 and the locking rotating block 19. A mounting hole 23 is provided on the locking piston rod 2 corresponding to the ejector block 31. The ejector block 31 is installed in the mounting hole 23 and can move axially.

[0048] The ejector block 31 includes a base block 27 and an adjusting block 28. The adjusting block 28 is threadedly connected to the base block 27. The base block 27 can move axially and is circumferentially locked. The adjusting block 28 can move both axially and circumferentially. The end of the base block 27 contacts the ejector rotating block 18, and the end of the adjusting block 28 contacts the locking rotating block 19. Both the mounting hole 23 and the base block 27 have a regular hexagonal cross-section. The adjusting block 28 is provided with an outwardly extending handle 29, which facilitates the rotation of the adjusting block 28.

[0049] The anti-loosening block 8 consists of a rotatable ejector block 18 and a locking block 19. When the locking nut 3 is tightened, it contacts the ejector block 18, causing it to deflect inward. The ejector block 31 then contacts the ejector block 18. As the ejector block 18 deflects inward, it moves the ejector block 31 outward. When the ejector block 31 contacts the locking block 19, it applies a force to the locking block 19, causing it to deflect outward. This results in the locking block 19 and the locking nut 3 being threadedly engaged, thus preventing loosening. After the locking nut 3 is tightened, the adjusting block 28 rotates, moving it away from the bottom block 27. The adjusting block 28 further pushes the locking block 19 outward, increasing the locking force between the locking block 19 and the locking nut 3, thereby improving the anti-loosening effect.

[0050] The outer wall of the ejector block 18 is inclined, thus forming a wedge-shaped structure that is wider on the inside and narrower on the outside. A protrusion 24 is provided on the ejector block 18, and a support surface 25 is provided on the protrusion 24. A hook 26 is provided on the locking block 19. One end of the ejector block 31 is supported on the support surface 25, and the other end of the ejector block 31 is supported on the hook 26. The support surface 25 is inclined, and its edge contacts the ejector block 31. The hook 26 is inclined towards the surface of the ejector block 31 from the outside inwards towards the ejector block 31, and its edge contacts the ejector block 31.

[0051] The outer wall of the ejector block 18 is inclined, allowing its bottom to extend beyond the outer wall of the locking piston rod 2, while other parts of the ejector block 18 do not extend beyond the outer wall of the locking piston rod 2, thus avoiding interference with the tightening process of the locking nut 3. The ejector block 31 is supported between the support surface 25 and the ejector hook 26. During the deflection of the ejector block 18, the ejector block 31 can be pushed outward, thereby pushing the locking block 19 outward to prevent loosening. The inclined support surface 25 facilitates the outward movement of the ejector block 31 when the ejector block 18 deflects inward. The inclined surface of the ejector hook 26 facilitates the outward movement of the ejector block 31, pushing the locking block 19 outward to prevent loosening.

[0052] The locking piston rod 2 in the locking cylinder 9 assembly is fixedly connected to the crosshead 1 in the template connecting rod assembly via a locking nut 3. When the locking piston rod 2 moves linearly, it drives the crosshead 1 to move linearly, thereby opening and closing the mold. To achieve locking and anti-loosening between the locking piston rod 2 and the crosshead 1, a locking and anti-loosening structure is designed. This locking and anti-loosening structure is designed with an anti-loosening block 8, which can deflect, and the bottom end of the anti-loosening block 8 extends out of the outer wall of the locking piston rod 2. During the process of tightening the locking nut 3 onto the locking piston rod 2, the locking nut 3 pushes against the bottom end of the anti-loosening block 8, causing the anti-loosening block 8 to deflect, and then the top end of the anti-loosening block 8 abuts against the inner wall of the locking nut 3 to achieve anti-loosening. The entire anti-loosening operation does not require drilling of the screws across the seam, and there are no space requirements between the moving template and the rear template. It can easily achieve the anti-loosening operation between the locking piston rod 2 and the locking nut 3, and the anti-loosening effect is good.

[0053] Example 3: A locking and anti-loosening structure for the crosshead and the mold-locking piston rod (see appendix) Figure 7 A locking nut 3 is connected to the locking piston rod 2. The outer wall of the locking piston rod 2 has an external thread, and the locking nut 3 has an internal thread. When the locking nut 3 is connected to the locking piston rod 2, the internal and external threads fit together to achieve locking. A boss 4 is provided on the locking piston rod 2, and a positioning ring 5 is installed at the boss 4. A connecting hole 6 is provided on the crosshead 1. The front end of the locking piston rod 2 passes through the connecting hole 6. The positioning ring 5 fits against the surface of the crosshead 1 on one side of the connecting hole 6. A countersunk hole 7 is provided on the other side of the connecting hole 6, and the locking nut 3 is placed in the countersunk hole 7.

[0054] Two rotatable anti-loosening blocks 8 are evenly distributed around the circumference of the locking piston rod 2 and the locking nut 3. The bottom end of the anti-loosening block 8 extends out of the outer wall of the locking piston rod 2. When the locking nut 3 is tightened onto the locking piston rod 2, the locking nut 3 pushes against the bottom end of the anti-loosening block 8, causing the anti-loosening block 8 to deflect, and then the top end of the anti-loosening block 8 abuts against the inner wall of the locking nut 3 to achieve anti-loosening.

[0055] The mold-locking piston rod 2 is connected to the mold-locking cylinder 9, thus forming the mold-locking cylinder 9 assembly. A piston 10 is connected to the mold-locking piston rod 2, and the piston 10 is fitted into the mold-locking cylinder 9. One end of the mold-locking cylinder 9 is connected to an end cap 11, which has an oil hole 12. The other end of the mold-locking cylinder 9 is connected to a limiting ring 13 and a sealing ring 14. A flange 15 is provided at the end of the sealing ring 14, and the flange 15 is tightly connected between the limiting ring 13 and the mold-locking cylinder 9. Both the limiting ring 13 and the sealing ring 14 are sealed and fitted with the mold-locking piston rod 2. A connecting seat 16 is installed on the outer wall of the mold-locking cylinder 9 at the corresponding position of the limiting ring 13. When the mold-locking cylinder 9 drives the piston 10 rod to move linearly, it will drive the crosshead 1 to move linearly, thereby realizing the opening and closing of the mold.

[0056] The locking nut 3 is installed at the end of the locking piston rod 2. Two mounting grooves 17 are provided on the outer wall of the end of the locking piston rod 2, corresponding to the anti-loosening block 8. The anti-loosening block 8 is installed in the mounting grooves 17. The mounting grooves 17 on the outer wall of the locking piston rod 2 facilitate the installation of the anti-loosening block 8. Except for the bottom portion extending into the mounting groove 17, the other parts of the anti-loosening block 8 are hidden within the mounting groove 17, preventing interference from other parts of the anti-loosening block 8 with the locking nut 3 during tightening. After the locking nut 3 contacts the outwardly protruding bottom of the anti-loosening block 8, the locking nut 3 is quickly tightened, pushing and deflecting the anti-loosening block 8, causing its top to abut against the inner wall of the locking nut 3, thus preventing loosening. Several anti-loosening grooves 32 are provided on both the bottom and top outer walls of the anti-loosening block 8. The anti-loosening grooves 32 ensure a tighter engagement between the outer wall of the anti-loosening block 8 and the inner wall of the locking nut 3, thereby improving the anti-loosening effect.

[0057] The anti-loosening block 8 is a long, integral structure, with its outer wall inclined outwards from the middle to both ends. A pivot 30 is located near the middle of the anti-loosening block 8, and the pivot 30 is rotatably connected to the side wall of the mounting groove 17 on the locking piston rod 2. As a single, long strip, when the bottom of the anti-loosening block 8 is pushed inwards, its top deflects outwards, thus abutting against the inner wall of the locking nut 3 to prevent loosening.

[0058] The locking piston rod 2 in the locking cylinder 9 assembly is fixedly connected to the crosshead 1 in the template connecting rod assembly via a locking nut 3. When the locking piston rod 2 moves linearly, it drives the crosshead 1 to move linearly, thereby opening and closing the mold. To achieve locking and anti-loosening between the locking piston rod 2 and the crosshead 1, a locking and anti-loosening structure is designed. This locking and anti-loosening structure is designed with an anti-loosening block 8, which can deflect, and the bottom end of the anti-loosening block 8 extends out of the outer wall of the locking piston rod 2. During the process of tightening the locking nut 3 onto the locking piston rod 2, the locking nut 3 pushes against the bottom end of the anti-loosening block 8, causing the anti-loosening block 8 to deflect, and then the top end of the anti-loosening block 8 abuts against the inner wall of the locking nut 3 to achieve anti-loosening. The entire anti-loosening operation does not require drilling of the screws across the seam, and there are no space requirements between the moving template and the rear template. It can easily achieve the anti-loosening operation between the locking piston rod 2 and the locking nut 3, and the anti-loosening effect is good.

[0059] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the present invention in any way. Other variations and modifications may be made without departing from the technical solutions described in the claims.

Claims

1. A locking and anti-loosening structure for a crosshead and a mold-locking piston rod, wherein a locking nut is connected to the mold-locking piston rod, characterized in that, A rotatable anti-loosening block is connected to the locking piston rod at a position corresponding to the locking nut. The bottom end of the anti-loosening block extends out of the outer wall of the locking piston rod. During the tightening of the locking nut onto the locking piston rod, the locking nut pushes against the bottom end of the anti-loosening block, causing the anti-loosening block to deflect, and then the top end of the anti-loosening block abuts against the inner wall of the locking nut to achieve anti-loosening. The anti-loosening block includes an ejector rotating block and a locking rotating block. The bottom outer wall of the ejector rotating block protrudes out of the outer wall of the locking piston rod. The ejector rotating block and the locking rotating block are rotatably connected together, and an ejector block is installed between the ejector rotating block and the locking rotating block. When the locking nut rotates and tightens, it contacts the ejector rotating block, causing the ejector rotating block to deflect inward, driving the ejector block to move outward. The ejector block applies a force to the locking rotating block, causing the locking rotating block to deflect outward and engage with the threads of the locking nut to achieve anti-loosening.

2. The locking and anti-loosening structure for the crosshead and the mold-locking piston rod according to claim 1, characterized in that, The outer wall of the locking piston rod is provided with a mounting groove corresponding to the anti-loosening block, and the anti-loosening block is installed in the mounting groove.

3. The locking and anti-loosening structure for the crosshead and the mold-locking piston rod according to claim 1, characterized in that, Several anti-loosening grooves are provided on the bottom outer wall and the top outer wall of the anti-loosening block.

4. The locking and anti-loosening structure for the crosshead and the mold-locking piston rod according to claim 1, characterized in that, The outer wall of the ejector block is tilted.

5. The locking and anti-loosening structure for the crosshead and the mold-locking piston rod according to claim 1, characterized in that, The ejector block has a protrusion and a support surface; the locking block has a hook, one end of the ejector block is supported on the support surface, and the other end of the ejector block is supported on the hook.

6. The locking and anti-loosening structure for the crosshead and the mold-locking piston rod according to claim 5, characterized in that, The support surface is inclined, and the edge of the support surface contacts the ejector block; the surface of the ejector hook facing the ejector block is inclined from the outside to the inside and towards the ejector block, and the edge of the ejector hook contacts the ejector block.

7. The locking and anti-loosening structure for the crosshead and the mold-locking piston rod according to claim 1, characterized in that, Mounting holes are provided on the locking piston rod and the ejector block, and the ejector block is installed in the mounting holes and can move axially.

8. A locking and anti-loosening structure for a crosshead and a mold-locking piston rod according to any one of claims 1 to 7, characterized in that, A boss is provided on the mold-locking piston rod, a positioning ring is installed on the boss, a connecting hole is provided on the crosshead, the front end of the mold-locking piston rod passes through the connecting hole, the positioning ring is attached to the surface of the crosshead on one side of the connecting hole, a countersunk hole is provided on the other side of the connecting hole, and the locking nut is placed in the countersunk hole.

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