Transmission connection structure of feeding screw rod of injection molding machine

Abstract

The utility model relates to a transmission connection structure of a feeding screw of an injection molding machine, which belongs to the technical field of injection molding machines, and comprises a transmission shaft seat and a feeding screw, the front end of the transmission shaft seat is provided with a connecting cylinder, the rear end of the feeding screw is arranged in the connecting cylinder, the outer side of the connecting cylinder is provided with fixed boxes which are symmetrically distributed, and the fixed boxes are connected with the transmission shaft seat. The top of the fixing box is of an opening structure, a box cover is installed at the top of the fixing box, a spring is fixedly installed at the bottom of the box cover, a fixing insertion rod is installed at the bottom end of the spring through a connecting assembly, and an insertion hole matched with the fixing insertion rod is formed in the rear end of the feeding screw rod. The utility model aims to provide the transmission connection structure of the feeding screw rod of the injection molding machine, which is not easy to fatigue and can be quickly mounted and dismounted.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molding machines, in particular to a transmission connection structure of a feeding screw of an injection molding machine. Background Art

[0002] Injection molding machine is the main molding equipment that can make thermoplastic plastics or thermosetting plastics into plastic products of various shapes using plastic molding molds; after the injection molding machine heats and plasticizes the plastic, it will inject the molten plastic into the mold cavity through the rotation of the feeding screw under a certain pressure and speed.

[0003] The traditional way to fix the feed screw is to set a positioning ring groove at the tail end of the feed screw, and use two semicircular pressure plates to clamp on the positioning ring groove. The semicircular pressure plate and the transmission shaft seat are fixedly connected by bolts, and the length direction of the bolts is consistent with the axial direction of the feed screw, so as to fix the feed screw. After long-term use, the bolts fixing the pressure plate and the transmission shaft seat will weaken the rigidity and mechanical strength of the bolts under the action of torque, becoming the weak point of the connection structure. In long-term work or when impacted, the bolts are prone to fatigue or cracks, or even breakage.

[0004] CN218366131U discloses a transmission connection structure of a feed screw of an injection molding machine, including a feed screw and a transmission shaft seat, the feed screw is connected to the transmission shaft seat, a first keyway is provided on the tail end face of the feed screw, and a positioning ring groove is provided on the side wall of the tail end of the feed screw; a connecting portion is extended on the beginning end face of the transmission shaft seat, a mounting hole is provided on the beginning end face of the connecting portion, a second keyway is provided on the hole wall of the mounting hole, a clamping ring assembly includes two semicircular clamping rings and a plurality of positioning bolts, a positioning ring platform and an annular boss are extended on the inner wall of the semicircular clamping ring, and a plurality of positioning bolts are used to fix the two semicircular clamping rings. The split type clamping ring assembly is used to cooperate with the connection part of the transmission shaft seat to tighten the screw, and the semicircular clamping ring is not easy to deform when subjected to axial force, so that the feed screw is not separated, and the positioning bolt will not receive the torsion in the circumferential direction of the feed screw, so that the positioning bolt is avoided from breaking, but the plurality of positioning bolts are used to fix the two semicircular clamping rings, and the structure is complicated.

[0005] Therefore, it is a problem that needs to be solved at present to find a transmission connection structure of a feeding screw of an injection molding machine that is not prone to fatigue and has a simple structure. Summary of the invention

[0006] The utility model aims to provide a transmission connection structure of a feeding screw of an injection molding machine, which is not prone to fatigue and can be quickly installed and disassembled.

[0007] The above technical problems are solved by the following technical solutions: including a transmission shaft seat and a feeding screw, the front end of the transmission shaft seat is equipped with a connecting tube, the rear end of the feeding screw is arranged inside the connecting tube, the outside of the connecting tube is provided with symmetrically distributed fixing boxes, the top of the fixing box is an open structure, a box cover is installed on the top of the fixing box, a spring is fixedly installed at the bottom of the box cover, a fixing rod is installed at the bottom of the spring through a connecting assembly, and a socket compatible with the fixing rod is opened inside the rear end of the feeding screw. The fixing rod can withstand high torque, and is not prone to fatigue or cracks, or even breakage, during long-term work or when impacted. The rear end of the feeding screw can be inserted into the interior of the connecting tube, so that the fixing rod enters the socket, so that the feeding screw cannot be pulled out from the interior of the connecting tube, and the connection between the feeding screw and the transmission shaft seat is completed, and the feeding screw can be quickly installed. The box cover is removed from the top of the fixed box, and the fixed plug rod is pulled out from the insertion hole. After the fixed plug rod is pulled out, the feeding screw can be pulled out from the inside of the connecting tube to realize the rapid disassembly of the feeding screw.

[0008] Preferably, convex rings are fixedly mounted on the upper and lower sides of the connecting tube, a through hole matched with the convex ring is provided at the bottom of the fixing box, and a through hole matched with the fixing plug rod is provided inside the convex ring.

[0009] Preferably, the fixing rod is a triangular prism structure. Its cross section is a triangle. Since the triangle is stable, firm and pressure-resistant, the fixing rod of the triangular prism structure can withstand a higher torque and is not prone to fatigue, cracks, or even breakage during long-term operation or when subjected to impact.

[0010] Preferably, threaded tubes are fixedly mounted at the four corners of the top and bottom of the connecting tube, and connecting convex edges are fixedly mounted below the front and rear sides of the fixing box.

[0011] Preferably, both left and right sides of the connecting flange are provided with accommodating holes adapted to the threaded barrel, screws are arranged inside the accommodating holes, the screws are threadedly connected to the threaded barrel, and the connecting flange is fixedly connected to the connecting barrel through the screws and the threaded barrel.

[0012] Preferably, the connecting assembly consists of a screw cap installed at the bottom end of the spring, a threaded column threadedly connected to the screw cap, and a limit plate arranged at the bottom end of the threaded column, and the bottom of the limit plate is fixedly connected to the top end of the fixed plug rod.

[0013] Preferably, a handle is fixedly mounted on the top of the box cover, and both the handle and the surface of the screw cap are provided with anti-slip protrusions.

[0014] Preferably, a magnetic ring is fixedly mounted on the inner wall of the fixed box, and an annular magnet is fixedly mounted on the bottom of the box cover. The annular magnet is matched with the magnetic ring, and the bottom of the annular magnet is in conflict with the top of the magnetic ring.

[0015] Preferably, the convex rings correspond to the through holes at the top and bottom of the connecting tube respectively, and the convex rings are adapted to the fixed plug rod.

[0016] Preferably, the rear end of the feeding screw is provided with a chamfer.

[0017] Preferably, the bottom end of the fixed insertion rod is an inclined structure to facilitate the insertion of the feeding screw.

[0018] Preferably, both the upper side and the lower side of the connecting tube are planar structures.

[0019] Preferably, the fixing box and the box cover are both detachable structures.

[0020] The beneficial effects of the utility model are:

[0021] The fixed plug rod is a triangular prism structure with a triangular cross section. Since the triangle is stable, firm and pressure-resistant, the fixed plug rod with a triangular prism structure can withstand higher torques and is not prone to fatigue, cracks, or even breakage during long-term operation or when subjected to impact. The convex ring can increase the contact area between the fixed plug rod and the connecting tube, disperse the pressure of the connecting tube on the fixed plug rod, and further avoid the possibility of cracks or breakage on the fixed plug rod.

[0022] The rear end of the feed screw can be inserted into the interior of the connecting tube, so that the fixed plug rod enters the insertion hole, so that the feed screw cannot be withdrawn from the interior of the connecting tube, and the connection between the feed screw and the transmission shaft seat is completed, and the feed screw can be quickly installed. Use the handle to remove the box cover from the top of the fixed box, and pull the fixed plug rod out of the insertion hole. After the fixed plug rod is pulled out, the feed screw can be pulled out from the interior of the connecting tube, so as to realize the rapid disassembly of the feed screw. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 , one A schematic diagram of the overall structure of the transmission connection structure of the feeding screw of an injection molding machine;

[0024] Figure 2 , one A sectional view of the transmission connection structure of a feed screw of an injection molding machine;

[0025] Figure 3 , Figure 2 The enlarged view of point A in the middle;

[0026] Figure 4 , oneA three-dimensional assembly diagram of the transmission connection structure of the feed screw of an injection molding machine;

[0027] Figure 5 , schematic diagram of the fixed box structure;

[0028] Figure 6 , schematic diagram of the box cover structure;

[0029] Figure 7 , schematic diagram of the fixed rod structure.

[0030] In the figure, 1, transmission shaft seat; 2, connecting tube; 3, fixed box; 4, feeding screw; 5, fixed plug rod; 6, box cover; 7, plug hole; 8, threaded tube; 9, convex ring; 10, magnetic ring; 11, connecting convex edge; 12, annular magnet; 13, spring; 14, screw cover; 15, limit plate; 16, through hole; 17, threaded column. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0032] like Figures 1 to 7 The transmission connection structure of the feeding screw of an injection molding machine shown in the figure includes a transmission shaft seat 1 and a feeding screw 4, the front end of the transmission shaft seat 1 is fixedly installed with a connecting tube 2, the rear end of the feeding screw 4 is arranged inside the connecting tube 2, the upper side and the lower side of the connecting tube 2 are both planar structures, the top and the bottom of the connecting tube 2 are installed with convex rings 9, the other end of the two convex rings 9 connected to the connecting tube 2 is connected to a fixed box 3, the top of the fixed box 3 is an open structure, the top of the fixed box 3 is installed with a box cover 6, the bottom of the box cover 6 is fixedly installed with a spring 13, the bottom end of the spring 13 is installed with a fixed rod 5 through a connecting component, the fixed rod 5 is a triangular prism structure, and its cross-section is a triangle. Since the triangle is stable, firm and pressure-resistant, the fixed rod of the triangular prism structure can withstand higher torque, and is not prone to fatigue or cracks, or even breakage, during long-term work or when impacted.

[0033] The bottom of the fixing box 3 is provided with a through hole 16 adapted to the fixing rod 5, the top and bottom of the connecting tube 2 are both provided with through holes 16 adapted to the fixing rod 5, the rear end of the feeding screw 4 is provided with a socket 7 adapted to the fixing rod 5, and the rear end of the feeding screw 4 is provided with a chamfer.

[0034] The two convex rings 9 correspond to the through holes 16 at the top and bottom of the connecting tube 2 respectively. The convex rings 9 are adapted to the fixed plug rod 5. The convex rings 9 can increase the contact area between the fixed plug rod 5 and the connecting tube 2, and can disperse the pressure applied by the connecting tube 2 to the fixed plug rod 5, further avoiding the possibility of cracks or breakage of the fixed plug rod 5.

[0035] When connecting the feeding screw 4 to the transmission shaft seat 1, the rear end of the feeding screw 4 can be inserted into the interior of the connecting tube 2. The rear end of the feeding screw 4 can push the fixed plug 5 to move upward, and as the feeding screw 4 moves, the fixed plug 5 will enter the insertion hole 7 under the action of the elastic force of the spring 13, so that the feeding screw 4 cannot be pulled out from the interior of the connecting tube 2, thereby completing the connection between the feeding screw 4 and the transmission shaft seat 1, and realizing the quick installation of the feeding screw 4.

[0036] The four corners of the top and bottom of the connecting tube 2 are fixedly mounted with threaded tubes 8, and the lower parts of the front and rear sides of the fixing box are fixedly mounted with connecting flanges 11. The left and right sides of the connecting flange 11 are provided with receiving holes adapted to the threaded tube 8, and screws are arranged inside the receiving holes, and the screws are threadedly connected to the threaded tube 8, and the connecting flange 11 is fixedly connected to the connecting tube 2 through the screws and the threaded tube 8.

[0037] The connecting assembly consists of a screw cap 14 installed at the bottom end of the spring 13, a threaded column 17 threadedly connected to the screw cap 14, and a limit plate 15 set at the bottom end of the threaded column 17. The bottom of the limit plate 15 is fixedly connected to the top end of the fixed plug rod 5.

[0038] A magnetic ring 10 is fixedly installed on the inner wall of the fixed box 3, and an annular magnet 12 is fixedly installed on the bottom of the box cover 6. The annular magnet 12 is adapted to the magnetic ring 10, and the bottom of the annular magnet 12 conflicts with the top of the magnetic ring 10; the annular magnet 12 can be adsorbed on the top of the magnetic ring 10, and the annular magnet 12 can be a magnet with strong suction force to prevent the box cover 6 from separating from the fixed box 3 when the transmission shaft seat 1 rotates, causing the fixed plug rod 5 to fall off from the socket 7.

[0039] Example 1

[0040] A transmission connection structure of a feeding screw of an injection molding machine, comprising a transmission shaft seat 1 and a feeding screw 4, comprising a transmission shaft seat 1 and a feeding screw 4, a connecting tube 2 is fixedly installed at the front end of the transmission shaft seat 1, and the rear end of the feeding screw 4 is arranged inside the connecting tube 2, the upper side and the lower side of the connecting tube 2 are both planar structures, the top and the bottom of the connecting tube 2 are both installed with convex rings 9, the other end of the two convex rings 9 connected to the connecting tube 2 is connected to a fixed box 3, the top of the fixed box 3 is an open structure, a box cover 6 is installed at the top of the fixed box 3, a spring 13 is fixedly installed at the bottom of the box cover 6, and a fixed plug rod 5 is installed at the bottom of the spring 13 through a connecting component, the fixed plug rod 5 is a triangular prism structure, and its cross section is a triangle. Since the triangle is stable, firm and pressure-resistant, the fixed plug rod of the triangular prism structure can withstand higher torque, and is not prone to fatigue or cracks, or even breakage, during long-term work or when subjected to impact.

[0041] The bottom of the fixing box 3 is provided with a through hole 16 adapted to the fixing rod 5, the top and bottom of the connecting tube 2 are both provided with through holes 16 adapted to the fixing rod 5, the rear end of the feeding screw 4 is provided with a socket 7 adapted to the fixing rod 5, and the rear end of the feeding screw 4 is provided with a chamfer.

[0042] The two convex rings 9 correspond to the through holes 16 at the top and bottom of the connecting tube 2 respectively. The convex rings 9 are adapted to the fixed plug rod 5. The convex rings 9 can increase the contact area between the fixed plug rod 5 and the connecting tube 2, and can disperse the pressure applied by the connecting tube 2 to the fixed plug rod 5, further avoiding the possibility of cracks or breakage of the fixed plug rod 5.

[0043] When connecting the feeding screw 4 to the transmission shaft seat 1, the rear end of the feeding screw 4 can be inserted into the interior of the connecting tube 2. The rear end of the feeding screw 4 can push the fixed plug 5 to move upward, and as the feeding screw 4 moves, the fixed plug 5 will enter the insertion hole 7 under the action of the elastic force of the spring 13, so that the feeding screw 4 cannot be pulled out from the interior of the connecting tube 2, thereby completing the connection between the feeding screw 4 and the transmission shaft seat 1, and realizing the quick installation of the feeding screw 4.

[0044] The fixed box 3 and the box cover 6 are both detachable. The box cover 6 is removed from the top of the fixed box 3 using a handle, and the fixed plug rod 7 is pulled out from the insertion hole 7. After the fixed plug rod 5 is pulled out, the feeding screw 4 can be pulled out from the inside of the connecting tube 2, thereby realizing the rapid disassembly of the feeding screw 4.

[0045] The four corners of the top and bottom of the connecting tube 2 are fixedly mounted with threaded tubes 8, and the lower parts of the front and rear sides of the fixing box are fixedly mounted with connecting flanges 11. The left and right sides of the connecting flange 11 are provided with receiving holes adapted to the threaded tube 8, and screws are arranged inside the receiving holes, and the screws are threadedly connected to the threaded tube 8, and the connecting flange 11 is fixedly connected to the connecting tube 2 through the screws and the threaded tube 8.

[0046] The connecting assembly consists of a screw cap 14 installed at the bottom end of the spring 13, a threaded column 17 threadedly connected to the screw cap 14, and a limit plate 15 set at the bottom end of the threaded column 17. The bottom of the limit plate 15 is fixedly connected to the top end of the fixed plug rod 5.

[0047] A magnetic ring 10 is fixedly installed on the inner wall of the fixed box 3, and an annular magnet 12 is fixedly installed on the bottom of the box cover 6. The annular magnet 12 is adapted to the magnetic ring 10, and the bottom of the annular magnet 12 conflicts with the top of the magnetic ring 10; the annular magnet 12 can be adsorbed on the top of the magnetic ring 10, and the annular magnet 12 can be a magnet with strong suction force to prevent the box cover 6 from separating from the fixed box 3 when the transmission shaft seat 1 rotates, causing the fixed plug rod 5 to fall off from the socket 7.

[0048] Example 2

[0049] A transmission connection structure of a feeding screw of an injection molding machine, comprising a transmission shaft seat 1 and a feeding screw 4, comprising a transmission shaft seat 1 and a feeding screw 4, a connecting tube 2 is fixedly installed at the front end of the transmission shaft seat 1, and a rear end of the feeding screw 4 is arranged inside the connecting tube 2, the upper side and the lower side of the connecting tube 2 are both planar structures, convex rings 9 are installed at the top and the bottom of the connecting tube 2, and the other end of the two convex rings 9 connected to the connecting tube 2 is connected to a fixed box 3, the top of the fixed box 3 is an open structure, a box cover 6 is installed at the top of the fixed box 3, a spring 13 is fixedly installed at the bottom of the box cover 6, and a fixed plug rod 5 is installed at the bottom of the spring 13 through a connecting component, the fixed plug rod 5 is a triangular prism structure, and its cross section is a triangle. Since the triangle has the characteristics of stability, firmness and pressure resistance, the fixed plug rod of the triangular prism structure can withstand higher torque, and is not prone to fatigue or cracks, or even breakage, during long-term work or when impacted, and the bottom end of the fixed plug rod is an inclined structure, which is convenient for operation and removal.

[0050] The bottom of the fixing box 3 is provided with a through hole 16 adapted to the fixing rod 5, the top and bottom of the connecting tube 2 are both provided with through holes 16 adapted to the fixing rod 5, the rear end of the feeding screw 4 is provided with a socket 7 adapted to the fixing rod 5, and the rear end of the feeding screw 4 is provided with a chamfer.

[0051] The two convex rings 9 correspond to the through holes 16 at the top and bottom of the connecting tube 2 respectively. The convex rings 9 are adapted to the fixed plug rod 5. The convex rings 9 can increase the contact area between the fixed plug rod 5 and the connecting tube 2, and can disperse the pressure applied by the connecting tube 2 to the fixed plug rod 5, further avoiding the possibility of cracks or breakage of the fixed plug rod 5.

[0052] When connecting the feeding screw 4 to the transmission shaft seat 1, the rear end of the feeding screw 4 can be inserted into the interior of the connecting tube 2. The rear end of the feeding screw 4 can push the fixed plug 5 to move upward, and as the feeding screw 4 moves, the fixed plug 5 will enter the insertion hole 7 under the action of the elastic force of the spring 13, so that the feeding screw 4 cannot be pulled out from the interior of the connecting tube 2, thereby completing the connection between the feeding screw 4 and the transmission shaft seat 1, and realizing the quick installation of the feeding screw 4.

[0053] The fixed box 3 and the box cover 6 are both detachable. The box cover 6 is removed from the top of the fixed box 3 using a handle, and the fixed plug rod 7 is pulled out from the insertion hole 7. After the fixed plug rod 5 is pulled out, the feeding screw 4 can be pulled out from the inside of the connecting tube 2, thereby realizing the rapid disassembly of the feeding screw 4.

[0054] The four corners of the top and bottom of the connecting tube 2 are fixedly mounted with threaded tubes 8, and the lower parts of the front and rear sides of the fixing box are fixedly mounted with connecting flanges 11. The left and right sides of the connecting flange 11 are provided with receiving holes adapted to the threaded tube 8, and screws are arranged inside the receiving holes, and the screws are threadedly connected to the threaded tube 8, and the connecting flange 11 is fixedly connected to the connecting tube 2 through the screws and the threaded tube 8.

[0055] The connecting assembly consists of a screw cap 14 installed at the bottom end of the spring 13, a threaded column 17 threadedly connected to the screw cap 14, and a limit plate 15 set at the bottom end of the threaded column 17. The bottom of the limit plate 15 is fixedly connected to the top end of the fixed plug rod 5.

[0056] A magnetic ring 10 is fixedly installed on the inner wall of the fixed box 3, and an annular magnet 12 is fixedly installed on the bottom of the box cover 6. The annular magnet 12 is adapted to the magnetic ring 10, and the bottom of the annular magnet 12 conflicts with the top of the magnetic ring 10; the annular magnet 12 can be adsorbed on the top of the magnetic ring 10, and the annular magnet 12 can be a magnet with strong suction force to prevent the box cover 6 from separating from the fixed box 3 when the transmission shaft seat 1 rotates, causing the fixed plug rod 5 to fall off from the socket 7.

[0057] The utility model uses a fixed plug rod with a triangular prism structure to replace the bolts of the traditional injection molding machine feed screw, which can withstand higher torque and is not prone to fatigue, cracks, or even breakage during long-term work or when subjected to impact. The feed screw can also be quickly installed and disassembled.

[0058] The above description is only a preferred embodiment of the present invention and does not constitute any limitation to the present invention. Any simple modification, change and equivalent transformation made to the above embodiments according to the technical essence of the present invention shall still fall within the protection scope of the technical solution of the present invention.

Claims

1. A transmission connection structure of a feeding screw of an injection molding machine, characterized in that: It includes a transmission shaft seat and a feeding screw, a connecting cylinder is installed at the front end of the transmission shaft seat, the rear end of the feeding screw is arranged inside the connecting cylinder, symmetrically distributed fixing boxes are provided on the upper and lower sides of the connecting cylinder, the top of the fixing box is an open structure, a box cover is installed on the top of the fixing box, a spring is fixedly installed on the bottom of the box cover, a fixing rod is installed on the bottom end of the spring through a connecting assembly, the top of the connecting assembly is a screw cover, and a socket matched with the fixing rod is opened inside the rear end of the feeding screw.

2. The transmission connection structure of the feeding screw of an injection molding machine according to claim 1, characterized in that: The upper and lower sides of the connecting tube are fixedly mounted with convex rings, the bottom of the fixing box is provided with a through hole matched with the convex ring, and the inner side of the convex ring is a through hole matched with the fixing plug rod.

3. The transmission connection structure of the feeding screw of an injection molding machine according to claim 2, characterized in that: The four corners of the top and bottom of the connecting tube are fixedly installed with threaded tubes, and the lower parts of the front and rear sides of the fixing box are fixedly installed with connecting convex edges.

4. The transmission connection structure of the feeding screw of an injection molding machine according to claim 3, characterized in that: The left and right sides of the connecting flange are provided with accommodating holes adapted to the threaded barrel, and screws are arranged inside the accommodating holes. The screws are threadedly connected to the threaded barrel, and the connecting flange is fixedly connected to the connecting barrel through the screws and the threaded barrel.

5. The transmission connection structure of the feeding screw of an injection molding machine according to claim 1, characterized in that: The connecting assembly consists of a screw cap installed at the bottom end of the spring, a threaded column threadedly connected to the screw cap, and a limit plate arranged at the bottom end of the threaded column, and the bottom of the limit plate is fixedly connected to the top end of the fixed plug rod.

6. The transmission connection structure of the feeding screw of an injection molding machine according to claim 1, characterized in that: A handle is fixedly mounted on the top of the box cover, and both the handle and the surface of the screw cap are provided with anti-slip protrusions.

7. The transmission connection structure of the feeding screw of an injection molding machine according to claim 6, characterized in that: A magnetic ring is fixedly installed on the inner wall of the fixed box, and an annular magnet is fixedly installed on the bottom of the box cover. The annular magnet is adapted to the magnetic ring, and the bottom of the annular magnet is in conflict with the top of the magnetic ring.

8. The transmission connection structure of the feeding screw of an injection molding machine according to claim 2, characterized in that: The convex rings correspond to the through holes at the top and bottom of the connecting tube respectively, and the inner hole of the convex ring is matched with the fixed plug rod.

9. A transmission connection structure of a feed screw of an injection molding machine according to claim 1 or 2 or 4 or 5 or 7, characterized in that: The rear end of the feeding screw is provided with a chamfer, and the bottom end of the fixed insertion rod is an inclined structure.

10. A transmission connection structure of a feed screw of an injection molding machine according to claim 1 or 2 or 4 or 5 or 7 or 8, characterized in that: The upper side and the lower side of the connecting tube are both planar structures, and the fixing box and the box cover are both detachable structures.

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