Lock shaft fixing structure and injection molding machine thereof

Abstract

The utility model relates to a lock shaft fixing structure and an injection molding machine thereof.The lock shaft fixing structure comprises a connecting rod and a matching plate allowing the end of the connecting rod to be pivoted, a lock shaft is arranged on the matching plate in a penetrating mode, the end of the connecting rod is arranged on the lock shaft in a sleeving mode, hinge holes allowing the lock shaft to penetrate are formed in the matching plate and the connecting rod, and a positioning locking mechanism is arranged between the lock shaft and the connecting rod; the positioning locking mechanism comprises a first positioning key groove recessed in at least one end of the lock shaft, a second positioning key groove recessed in the connecting rod and in butt joint with the two ends of the first positioning key groove, and a positioning key capable of being inserted into the first positioning key groove and the second positioning key groove at the same time. A locking mechanism is arranged between the positioning key and the first positioning key groove and / or the second positioning key groove. The device has the effects that the mounting stability of the lock shaft is improved, and the situation that the lock shaft falls off is reduced.

Description

Technical Field

[0001] The present application relates to the field of injection molding machine accessories, and in particular to a shaft locking fixing structure and an injection molding machine thereof. Background Art

[0002] The locking shaft refers to one of the parts of the crankshaft connecting rod mechanism, and the two connecting rods are generally hinged through the locking shaft.

[0003] In the prior art, such as an injection molding machine hinge structure with patent application number CN217777697U, a crank-link mechanism is generally used when locking the mold of the injection molding machine. The stability of the crank-link mechanism depends on the stability of the lock shaft installation. Generally, the lock shaft is pressed against the lock shaft by a positioning key, thereby fixing the lock shaft to the connecting rod, and the positioning key is generally fixed to the connecting rod by a screw.

[0004] When using a crank-link mechanism, the screws are easily vibrated, causing the screws to loosen, fall off, or even break, which in turn causes the lock shaft to fall off and the crank-link mechanism to fail. Utility Model Content

[0005] In order to improve the stability of the lock shaft installation and reduce the possibility of the lock shaft falling off, the present application provides a lock shaft fixing structure and an injection molding machine thereof.

[0006] A lock shaft fixing structure includes a connecting rod and a mating plate for pivotally connecting the end of the connecting rod, a lock shaft is passed through the mating plate, and the end of the connecting rod is sleeved on the lock shaft. Both the mating plate and the connecting rod are provided with hinge holes for the lock shaft to pass through, and a positioning locking mechanism is provided between the lock shaft and the connecting rod. The positioning locking mechanism includes a first positioning key groove recessed at at least one end of the lock shaft, a second positioning key groove recessed at both ends of the first positioning key groove on the connecting rod, and a positioning key that can be inserted into the first positioning key groove and the second positioning key groove at the same time, and a locking mechanism is provided between the positioning key and the first positioning key groove and / or the second positioning key groove.

[0007] By adopting the above technical solution, when the connecting rod rotates, the positioning key is pressed against the lock shaft in the circumferential direction of the lock shaft in the first positioning key groove, thereby reducing the rotation of the lock shaft on the connecting rod. The positioning key is pressed against the lock shaft in the axial direction of the lock shaft in the first positioning key groove, thereby reducing the situation where the lock shaft is separated from the connecting rod, thereby improving the stability of the lock shaft installation and reducing the situation where the lock shaft falls off.

[0008] Preferably, the locking mechanism includes a screw, which is arranged on the side of the positioning key away from the connecting rod. The positioning key is provided with a through hole for the screw to pass through, and the connecting rod is provided with a threaded hole for the screw to threadably engage with. The screw passes through the through hole and is threadedly engaged with the threaded hole to be locked.

[0009] By adopting the above technical solution, the screw presses the locating key toward the connecting rod in the axial direction of the lock shaft, thereby reducing the slippage of the locating key in the second locating key slot and the detachment of the locating key from the connecting rod, thereby improving the stability of the locating key installation.

[0010] Preferably, the screws are provided at both ends of the positioning key.

[0011] By adopting the above technical solution, the screws at both ends of the locating key simultaneously press the locating key toward the connecting rod, thereby reducing the locating key from slipping in the second locating key slot and reducing the locating key from detaching from the connecting rod, thereby improving the stability of the locating key installation.

[0012] Preferably, both ends of the connecting rod are provided with hinge blocks, and the hinge hole and the second positioning key groove are both opened on the hinge blocks.

[0013] By adopting the above technical solution, when the connecting rod rotates, wear is likely to occur between the connecting rod and the lock shaft. The wear of the connecting rod is reduced by the hinge block, thereby reducing the damage to the connecting rod and improving the stability of the connection between the connecting rod and the lock shaft.

[0014] Preferably, a reinforcing rib is provided between the connecting rod and the hinge block for strengthening the connection.

[0015] By adopting the above technical solution, one side of the reinforcing rib is integrated with the hinge block, and the other side of the reinforcing rib is integrated with the connecting rod, thereby strengthening the connection between the connecting rod and the hinge block, reducing the occurrence of breakage between the hinge block and the connecting rod, and improving the stability of the connecting rod.

[0016] Preferably, the reinforcing ribs are arranged in a ring shape.

[0017] By adopting the above technical solution, the inner ring of the annular reinforcement rib is integrated with the hinge block, and the bottom surface of the reinforcement rib is integrated with the connecting rod, thereby further strengthening the connection between the connecting rod and the hinge block, reducing the occurrence of fracture between the hinge block and the connecting rod, and improving the stability of the connecting rod.

[0018] Preferably, a transition curved surface is provided on the reinforcing rib.

[0019] By adopting the above technical solution, the connecting rod and the reinforcement rib are continuously transitioned to the hinge block through a smooth transition surface, and the weight of the reinforcement rib is reduced, reducing costs. At the same time, the wear of the reinforcement rib is reduced through the transition surface.

[0020] An injection molding machine includes a movable plate, a tail plate, a thrust seat and a crank arm connecting rod mechanism. The crank arm connecting rod mechanism includes two groups of connecting rods pivotally connected to the movable plate and the thrust seat and between the thrust seat and the tail plate respectively. Lock shafts and the positioning locking mechanism and locking mechanism are provided between the connecting rods, between the connecting rods and the movable plate, between the connecting rods and the tail plate, and between the connecting rods and the thrust seat.

[0021] By adopting the above technical solution, the movable plate, tail plate, thrust seat and crank arm connecting rod mechanism are hinged to each other through the fixing structure and the locking structure, thereby improving the installation stability of the crank arm connecting rod mechanism and reducing the failure of the crank arm connecting rod mechanism.

[0022] In summary, this application includes at least one of the following beneficial technical effects:

[0023] 1. The positioning key is in the first positioning key groove and presses against the lock shaft in the circumferential direction of the lock shaft, thereby reducing the rotation of the lock shaft on the connecting rod;

[0024] 2. The positioning key is in the first positioning key slot and presses against the lock shaft in the axial direction of the lock shaft, thereby reducing the situation where the lock shaft is separated from the connecting rod;

[0025] 3. The screw presses the positioning key toward the connecting rod in the axial direction of the lock shaft, thereby reducing the situation where the positioning key slips in the second positioning key slot and reduces the situation where the positioning key is separated from the connecting rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of a locking shaft fixing structure in an embodiment of the present application.

[0027] Figure 2 It is a structural diagram of an injection molding machine.

[0028] Figure 3 This is an exploded diagram of an injection molding machine.

[0029] Explanation of the accompanying drawings: 1. connecting rod; 2. locking shaft; 3. hinge hole; 4. positioning locking mechanism; 5. positioning key; 6. second positioning keyway; 7. first positioning keyway; 8. locking mechanism; 9. screw; 10. through hole; 11. threaded hole; 12. hinge block; 13. reinforcing rib; 14. transition surface; 15. movable plate; 16. tail plate; 17. thrust seat; 18. crank arm connecting rod mechanism; 19. connecting block; 20. tail plate connecting rod; 21. movable plate connecting rod; 22. tail plate bracket; 23. mounting block; 24. movable plate bracket; 25. mounting groove; 26. center connecting rod; 27. limiting column; 28. through hole; 29. center bracket; 30. protrusion; 31. pressure block. DETAILED DESCRIPTION

[0030] The following is combined with Figure 1-3 This application is described in further detail.

[0031] Reference Figure 1 The embodiment of the present application discloses a lock shaft fixing structure and an injection molding machine thereof, comprising a movable plate 15, a tail plate 16, a thrust seat 17, a crank arm connecting rod mechanism 18, a lock shaft 2, a positioning locking mechanism 4 and a locking mechanism 8. The crank arm connecting rod mechanism 18 comprises two groups of connecting rods 1 pivotally connected between the movable plate 15 and the thrust seat 17 and between the thrust seat 17 and the tail plate 16, respectively. The lock shaft 2 is arranged between the connecting rod 1 and the matching plate. The matching plate refers to the position where the connecting rod 1 is to be installed, such as between the connecting rods 1 and the connecting rods 1, between the connecting rod 1 and the movable plate 15, between the connecting rod 1 and the tail plate 16, and between the connecting rod 1 and the thrust seat 17. The movable plate 15, the tail plate 16, the thrust seat 17 and the connecting rod 1 are all provided with hinge holes 3 for the lock shaft 2 to pass through and rotate. The positioning locking mechanism 4 is used to secure the lock shaft 2 to the connecting rod 1. The securing device includes a positioning key 5. The connecting rod 1 has a second positioning key slot 6 for the positioning key 5 to be inserted into. The second positioning key slot 6 is connected to the hinge hole 3. The lock shaft 2 has a first positioning key slot 7 for the positioning key 5 to be engaged. The locking mechanism 8 is used to secure the positioning key 5 to the crank arm connecting rod mechanism 18.

[0032] Reference Figure 1 The locking mechanism 8 includes a screw 9, which is arranged on the side of the positioning key 5 away from the connecting rod 1. The positioning member is provided with a through hole 10 for the screw 9 to pass through, and the connecting rod 1 is provided with a threaded hole 11 for the screw 9 to threadably engage with. The screw 9 passes through the through hole 10 and is threadedly engaged with the threaded hole 11 to be locked, thereby pressing the positioning key 5 toward the connecting rod 1 in the axial direction of the lock shaft 2, thereby reducing the situation where the positioning key 5 is separated from the second positioning key slot 6. At least one screw 9 is provided, and in this embodiment, two screws 9 are symmetrically provided as an example. A spring washer can be added between the screw 9 and the positioning key 5 to improve the shock resistance of the screw 9.

[0033] Reference Figure 1 Both ends of the connecting rod 1 are integrally provided with hinge blocks 12, and the hinge holes 3 are opened on the hinge blocks 12. The end surface of the hinge blocks 12 exceeds the surface of the connecting rod 1. The hinge blocks 12 reduce the wear of the connecting rod 1 during rotation, thereby improving the stability of the connection between the connecting rod 1 and the lock shaft 2.

[0034] Reference Figure 1 A reinforcing rib 13 is provided between the connecting rod 1 and the hinge block 12. One side of the reinforcing rib 13 is integrally provided with the hinge block 12, and the other side of the reinforcing rib 13 is integrally provided with the connecting rod 1. This strengthens the connection strength between the connecting rod 1 and the hinge block 12 and reduces the possibility of breakage of the connecting rod 1 and the hinge block 12. Additional reinforcing ribs 13 can be provided to improve the connection strength between the connecting rod 1 and the hinge block 12. In this embodiment, an annular reinforcing rib 13 is used to strengthen the connection strength between the connecting rod 1 and the hinge block 12.

[0035] Reference Figure 1A transition surface 14 is provided on the reinforcing rib 13, and the connecting rod 1 continuously transitions to the hinge block 12 through the transition surface 14, thereby reducing the wear of the reinforcing rib 13, reducing the weight of the connecting rod 1, and improving the stability of the crank-link mechanism 18.

[0036] Reference Figure 2 and Figure 3 The connecting rod 1 includes a tailgate connecting rod 20 and a movable plate connecting rod 21. One end of the tailgate connecting rod 20 is symmetrically hinged to one side of the tailgate 16, and one end of the movable plate connecting rod 21 is hinged to the other end of the tailgate connecting rod 20. The other end of the movable plate connecting rod 21 is symmetrically hinged to the side of the movable plate 15 closest to the tailgate 16. The lock shaft 2 is disposed between the tailgate 16 and the tailgate connecting rod 20, between the tailgate connecting rod 20 and the movable plate connecting rod 21, and between the movable plate connecting rod 21 and the movable plate 15. Hinge holes 3 are provided in the tailgate 16, the tailgate connecting rod 20, the movable plate connecting rod 21, and the movable plate 15.

[0037] Reference Figure 2 and Figure 3 The tailgate link 20 includes a plurality of tailgate brackets 22 arranged at intervals to enhance the structural strength of the tailgate link 20. The tailgate 16 is provided with mounting blocks 23 for mounting the tailgate brackets 22. Each mounting block 23 is located between the tailgate brackets 22, and a hinge hole 3 is defined in the mounting block 23.

[0038] Reference Figure 2 and Figure 3 The movable plate connecting rod 21 includes a plurality of movable plate brackets 24, which are arranged at intervals to improve the structural strength of the movable plate connecting rod 21. Each movable plate bracket 24 is located between the tail plate brackets 22. The movable plate 15 is provided with a mounting groove 25 for the movable plate 15 to be installed and rotated. The mounting groove 25 is connected to the hinge hole 3.

[0039] Reference Figure 2 and Figure 3The connecting rod 1 also includes a center connecting rod 26. One end of the center connecting rod 26 is hinged to the tailgate connecting rod 20, and the thrust seat 17 is hinged to the other end of the center connecting rod 26. The center connecting rod 26 is symmetrically hinged on both sides of the thrust seat 17. The lock shaft 2 is also disposed between the tailgate connecting rod 20 and the center connecting rod 26, and between the center connecting rod 26 and the thrust seat 17. Hinge holes 3 are provided in the tailgate connecting rod 20, the center connecting rod 26, and the thrust seat 17. Limiting posts 27 are symmetrically provided on one side of the tailgate 16 near the thrust seat 17. The limiting posts 27 are located on the line of symmetry between the hinge of the center connecting rod 26 and the thrust seat 17. The thrust seat 17 is provided with a through hole 28 for the limiting posts 27 to pass through. When the movable plate 15 moves, it drives the movable plate connecting rod 21 to rotate, thereby driving the tail plate connecting rod 20 to rotate, and then driving the center connecting rod 26 to rotate. When the center connecting rod 26 rotates, it drives the thrust seat 17 to move. The limiting column 27 presses against the thrust seat 17 in the through hole 28, thereby limiting the movement of the thrust seat 17 in the vertical direction of the tail plate 16, thereby reducing the deviation of the thrust seat 17, and further reducing the situation where the tail plate connecting rod 20 and the movable plate connecting rod 21 are damaged due to uneven force caused by the deviation of the movable plate 15.

[0040] Reference Figure 2 and Figure 3 The center link 26 includes multiple center brackets 29, which are arranged at intervals to improve the structural strength of the center link 26. Each center bracket 29 is located between the tail plate brackets 22. A protrusion 30 for installing the center bracket 29 is provided on the thrust seat 17. The hinge hole 3 is opened on the protrusion 30, and each center bracket 29 is located between the protrusions 30.

[0041] Reference Figure 2 and Figure 3 A pressing block 31 is welded to the end of the limiting post 27 away from the tail plate 16, which is used to retain the thrust seat 17 on the limiting post 27. A connecting block 19 is integrally provided on the side of the tail plate 16 near the pressing block 31, which is used to secure the pressing block 31. The pressing block 31 prevents the thrust seat 17 from separating from the limiting post 27, thereby causing the movable plate 15 to deviate. The connecting block 19 improves the stability of the installation of the pressing block 31.

[0042] Working principle:

[0043] When the movable plate 15 moves, it drives the movable plate connecting rod 21 and the tail plate connecting rod 20 to rotate, and the rotation of the tail plate connecting rod 20 drives the center connecting rod 26 to rotate. At this time, the positioning key 5 is pressed against the lock shaft 2 in the circumferential direction of the lock shaft 2 in the first positioning key groove 7, thereby reducing the circumferential rotation of the lock shaft 2, and the positioning key 5 is pressed against the lock shaft 2 in the axial direction of the lock shaft 2 in the first positioning key groove 7, thereby reducing the lock shaft 2 from falling off; the center connecting rod 26 rotates to drive the thrust seat 17 to slide on the limit column 27, and the limit column 27 is pressed against the thrust seat 17 in the through hole 28, thereby reducing the offset of the thrust seat 17 and thus reducing the offset of the movable plate 15.

[0044] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A locking shaft fixing structure, comprising a connecting rod (1) and a matching plate for pivotally connecting the end of the connecting rod (1), wherein a locking shaft (2) is passed through the matching plate, the end of the connecting rod (1) is sleeved on the locking shaft (2), and a hinge hole (3) for passing the locking shaft (2) is formed on both the matching plate and the connecting rod (1), characterized in that: A positioning locking mechanism (4) is provided between the lock shaft (2) and the connecting rod (1), the positioning locking mechanism (4) comprising a first positioning key groove (7) recessed at at least one end of the lock shaft (2), a second positioning key groove (6) recessed at both ends of the connecting rod (1) and docked with the first positioning key groove (7), and a positioning key (5) that can be inserted into the first positioning key groove (7) and the second positioning key groove (6) at the same time, and a locking mechanism (8) is provided between the positioning key (5) and the first positioning key groove (7) and / or the second positioning key groove (6).

2. The shaft locking and fixing structure according to claim 1, characterized in that: The locking mechanism (8) includes a screw (9), which is arranged on a side of the positioning key (5) away from the connecting rod (1), and a through hole (10) for the screw (9) to pass through is provided on the positioning key (5), and a threaded hole (11) for the screw (9) to threadably engage with is provided on the connecting rod (1), and the screw (9) passes through the through hole (10) and is threadably engaged with the threaded hole (11) for locking.

3. The shaft locking and fixing structure according to claim 2, characterized in that: The screws (9) are arranged at both ends of the positioning key (5).

4. The shaft locking and fixing structure according to claim 1, characterized in that: Both ends of the connecting rod (1) are provided with hinge blocks (12), and the hinge hole (3) and the second positioning key groove (6) are both opened on the hinge blocks (12).

5. The shaft locking and fixing structure according to claim 4, characterized in that: A reinforcing rib (13) for strengthening the connection is provided between the connecting rod (1) and the hinge block (12).

6. The shaft locking and fixing structure according to claim 5, characterized in that: The reinforcing ribs (13) are arranged in a ring shape.

7. The shaft locking and fixing structure according to claim 6, characterized in that: A transition curved surface (14) is provided on the reinforcing rib (13).

8. An injection molding machine, comprising a movable plate (15), a tail plate (16), a thrust seat (17), and a crank arm connecting rod mechanism (18), wherein the crank arm connecting rod mechanism (18) comprises two sets of connecting rods (1) pivotally connected to the movable plate (15) and the thrust seat (17) and between the thrust seat (17) and the tail plate (16), and characterized in that: A locking shaft (2) and a positioning locking mechanism (4) and a locking mechanism (8) as described in any one of claims 1 to 7 are provided between the connecting rods (1), between the connecting rods (1) and the movable plate (15), between the connecting rods (1) and the tail plate (16), and between the connecting rods (1) and the thrust seat (17).

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