A drive structure for an injection molding machine and an injection molding machine

Abstract

A transmission structure for an injection molding machine and an injection molding machine, the transmission structure comprising: a driving motor, a transmission shaft, a single-row tapered bearing, a deep groove ball bearing, a thrust aligning bearing and a glue injection seat; one end of the transmission shaft is coaxially connected to the output end of the driving motor, and the other end is used for connecting a glue injection screw; the inner rings of the single-row tapered bearing, the thrust aligning bearing and the deep groove ball bearing are coaxially installed on the outside of the transmission shaft, and the outer rings of the three are installed on the glue injection seat. The injection molding machine is characterized in that the glue injection screw is matched with the transmission shaft, the driving motor is used for driving the transmission shaft to rotate, and the glue injection screw is driven to rotate. The transmission structure further reduces the friction and torsional load generated between the glue injection screw and the glue injection cylinder by arranging the single-row tapered bearing, the deep groove ball bearing and the thrust aligning bearing at the transmission shaft connected with the glue injection screw, reduces the shaking phenomenon of the center of the glue injection screw, and improves the working stability of the glue injection screw.

Description

Technical Field

[0001] This invention relates to the field of injection molding machine technology, and more particularly to a transmission structure for an injection molding machine and an injection molding machine. Background Technology

[0002] In existing injection molding machines, the output of the sol-gel hydraulic motor rotates at high speed, driving the sol-gel screw to rotate at high speed. During extrusion, plasticizing, and transfer, the sol-gel screw generates significant friction and torque with the sol-gel barrel, creating a load that causes the moving parts to bear combined radial and axial loads. This results in vibration at the center of the sol-gel screw during the sol-gel process. Simultaneously, the prolonged rotation of the sol-gel screw generates substantial residual heat in the rotating and transmission components. Traditional grease, due to high temperatures and infrequent replacement, oxidizes and burns out at high temperatures, reducing the lifespan or damaging these components. This leads to unstable machine operation and inconsistent product quality. Summary of the Invention

[0003] The purpose of this invention is to provide a transmission structure for an injection molding machine, wherein the inner rings of a single-row tapered roller bearing, a thrust self-aligning bearing, and a deep groove ball bearing are coaxially mounted on the outer side of the transmission shaft.

[0004] The present invention also proposes an injection molding machine that uses a sol-gel screw in conjunction with the aforementioned transmission structure.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] A transmission structure for an injection molding machine includes: a drive motor, a drive shaft, a single-row tapered roller bearing, a deep groove ball bearing, a thrust self-aligning bearing, and an injection seat;

[0007] One end of the drive shaft is coaxially connected to the output end of the drive motor, and the other end is used to connect to the sol-gel screw; the inner rings of the single-row tapered bearing, the thrust self-aligning bearing, and the deep groove ball bearing are coaxially mounted on the outside of the drive shaft, and the outer rings of the three are mounted on the injection seat.

[0008] Preferably, the single-row tapered bearing, thrust self-aligning bearing, and deep groove ball bearing are located in the same straight line.

[0009] Preferably, the injection station has a receiving cavity;

[0010] The outer rings of the single-row tapered roller bearing, the thrust self-aligning bearing, and the deep groove ball bearing are installed in the receiving cavity; the receiving cavity is sealed at both ends; the interior of the receiving cavity is used to contain lubricating oil;

[0011] At least one of the output end of the drive motor, the drive shaft, the single-row tapered bearing, the deep groove ball bearing, and the thrust self-aligning bearing is in contact with the lubricating oil.

[0012] Preferably, it includes: a motor sealing ring and a sealing ring;

[0013] The drive motor has its output end extending into the receiving cavity; one end of the receiving cavity is connected to the drive motor, and the other end is sleeved on the outside of the transmission shaft; the motor sealing ring is disposed between the drive motor and the receiving cavity; the sealing ring is sleeved on the outside of the transmission shaft and fixed to the other end of the receiving cavity.

[0014] The cavity is internally sealed by at least the motor sealing ring and the sealing ring, so that the cavity forms a space for holding the lubricating oil.

[0015] Preferably, at least one of the motor sealing ring, the sealing ring, and the receiving cavity is provided with an oil inlet and / or an oil outlet.

[0016] Preferably, the oil inlet is located above at least one of the output end of the drive motor, the transmission shaft, the single-row tapered bearing, the deep groove ball bearing, and the thrust self-aligning bearing.

[0017] Preferably, the receiving cavity includes: a long diameter end and a short diameter end;

[0018] The diameter of the long end is greater than the diameter of the short end; the oil drain hole is provided below the long end.

[0019] Preferably, the long diameter end is connected to the drive motor; the short diameter end surrounds the drive shaft; and the short diameter end transitions to the long diameter end via an inclined surface.

[0020] An injection molding machine includes: a sol-gel screw and the aforementioned transmission structure;

[0021] The sol screw is coupled to the drive shaft, and the drive motor is used to drive the drive shaft to rotate, thereby driving the sol screw to rotate.

[0022] Preferably, it further includes: an injection-molded base;

[0023] The injection unit has a movable block at its bottom; the injection base has a movable track; the movable block is movably engaged with the movable track, allowing the injection unit to move movably on the injection base.

[0024] The beneficial effects of this invention are:

[0025] This transmission structure, by incorporating a single-row tapered roller bearing, a deep groove ball bearing, and a thrust self-aligning bearing at the drive shaft connecting the sol screw, further reduces the load generated by friction and torque between the sol screw and the sol barrel during extrusion, plasticization, and transmission. This reduces the combined radial and axial load on the sol screw, minimizes vibration at the center of the sol screw, and improves the working stability of the sol screw. Attached Figure Description

[0026] Figure 1 This is a cross-sectional schematic diagram of the transmission structure;

[0027] Figure 2 This is a schematic diagram of a transmission structure without a glue injection unit;

[0028] Figure 3 This is a structural diagram of an injection molding machine;

[0029] Figure 4 This is a schematic diagram of the injection unit;

[0030] Figure 5 This is a cross-sectional schematic diagram of the transmission structure.

[0031] in:

[0032] 1. Drive motor; 2. Drive shaft; 3. Single-row tapered roller bearing; 4. Deep groove ball bearing; 5. Thrust self-aligning bearing; 6. Injection base; 7. Solvent screw; 8. Motor seal ring; 9. Sealing seal ring; 101. Oil inlet; 102. Oil outlet; 103. Injection base; 104. Moving track.

[0033] Output terminal 11;

[0034] Receiving cavity 61; long diameter end 611, inclined surface 612, short diameter end 613; moving block 62. Detailed Implementation

[0035] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0036] A transmission structure for an injection molding machine includes: a drive motor 1, a transmission shaft 2, a single-row tapered roller bearing 3, a deep groove ball bearing 4, a thrust self-aligning bearing 5, and an injection seat 6.

[0037] One end of the drive shaft 2 is coaxially connected to the output end 11 of the drive motor 1, and the other end is used to connect to the sol screw 7; the inner rings of the single-row tapered bearing 3, the thrust self-aligning bearing 5 and the deep groove ball bearing 4 are coaxially mounted on the outside of the drive shaft 2, and the outer rings of the three are mounted on the injection seat 6.

[0038] This transmission structure, by setting a single-row tapered bearing 3, a deep groove ball bearing 4, and a thrust self-aligning bearing 5 at the transmission shaft 2 connecting the sol screw 7, further reduces the load generated by friction and torque between the sol screw 7 and the sol cylinder 105 during extrusion, plasticization, and transmission. This reduces the combined radial and axial load on the sol screw 7, reduces the vibration phenomenon at the center of the sol screw 7, and improves the working stability of the sol screw 7.

[0039] Specifically, the output end 11 of the drive motor 1 drives the transmission shaft 2 to rotate, and the transmission shaft 2 drives the sol screw 7 to rotate at high speed. Due to the rotation of the sol screw 7, the plastic is brought into the sol cylinder for extrusion, plasticization and transfer.

[0040] The single-row tapered bearing 3 is fitted on the outside of the drive shaft 2 and can withstand radial loads and axial loads in one direction. The bearing has a strong load-bearing capacity per unit width, which greatly reduces the frictional consumption between the sol screw 7 and the sol cylinder during the sol action.

[0041] The thrust self-aligning bearing 5 is sleeved on the outside of the transmission shaft 2. It has a very large axial load capacity and can withstand a certain radial load while bearing the axial load. It can also withstand a large load during the sol action and ensure the coaxial center.

[0042] The deep groove ball bearing 4 is fitted on the outside of the drive shaft 2. It mainly bears radial loads, but can also bear radial and axial loads at the same time. It has a very small coefficient of friction and a very high limiting speed, thus ensuring the center offset.

[0043] The combination of single-row tapered bearing 3, deep groove ball bearing 4 and thrust self-aligning bearing 5 reduces the friction and torque load generated between the sol screw 7 and the sol cylinder, and reduces the center vibration phenomenon of the sol screw 7 during the sol action.

[0044] Preferably, the single-row tapered bearing 3, the thrust self-aligning bearing 5, and the deep groove ball bearing 4 are located in the same straight line.

[0045] like Figure 1 Because the single-row tapered bearing 3, the thrust self-aligning bearing 5, and the deep groove ball bearing 4 are located on the same straight line, forming a three-point-one-line structure, the working of the sol screw 7 is more stable. This solves the vibration phenomenon caused by the axial and radial movement of the center of the sol screw 7 during the sol action, and also reduces the friction between the sol screw 7 and the sol barrel, so that the sol screw 7 can withstand a greater load.

[0046] Preferably, the injection station 6 is provided with a receiving cavity 61;

[0047] The outer rings of the single-row tapered bearing 3, the thrust self-aligning bearing 5, and the deep groove ball bearing 4 are installed in the receiving cavity 61; the receiving cavity 61 is sealed at both ends; the interior of the receiving cavity 61 is used to contain lubricating oil.

[0048] At least one of the output end 11 of the drive motor 1, the transmission shaft 2, the single-row tapered bearing 3, the deep groove ball bearing 4, and the thrust self-aligning bearing 5 is in contact with the lubricating oil.

[0049] The receiving cavity 61 can be used to hold lubricating oil. The lubricating oil in the receiving cavity 61 can fully contact one or more of the following components: the output end 11 of the drive motor 1, the drive shaft 2, the single-row tapered bearing 3, the deep groove ball bearing 4, and the thrust self-aligning bearing 5. When one of the components moves, it will come into contact with the lubricating oil, thus replenishing the lubricating oil in real time. This continuous replenishment of lubricating oil ensures that the output end 11 of the drive motor 1, the drive shaft 2, the single-row tapered bearing 3, the deep groove ball bearing 4, and the thrust self-aligning bearing 5 maintain high mobility for a long time, thereby improving the service life of the components. Meanwhile, the lubricating oil has a cooling effect. When components rotate at high speed, heat is generated. When the output end 11 of the drive motor 1, the transmission shaft 2, the single-row tapered bearing 3, the deep groove ball bearing 4, and the thrust self-aligning bearing 5 come into contact with the lubricating oil, the heat can be transferred to the lubricating oil. The lubricating oil provides cooling for the output end 11 of the drive motor 1, the transmission shaft 2, the single-row tapered bearing 3, the deep groove ball bearing 4, and the thrust self-aligning bearing 5, thereby making the rotating and transmission components work more sensitively and efficiently, with a longer service life and higher product quality.

[0050] Preferably, it includes: a motor sealing ring 8 and a sealing ring 9;

[0051] The drive motor 1 has its output end 11 extending into the receiving cavity 61; one end of the receiving cavity 61 is connected to the drive motor 1, and the other end is sleeved on the outside of the transmission shaft 2; the motor sealing ring 8 is disposed between the drive motor 1 and the receiving cavity 61; the sealing ring 9 is sleeved on the outside of the transmission shaft 2 and fixed to the other end of the receiving cavity 61.

[0052] The cavity 61 is internally sealed by at least the motor sealing ring 8 and the sealing ring 9, so that the cavity 61 forms a space for holding the lubricating oil.

[0053] like Figure 4 and Figure 5The two ends of the receiving cavity 61 are connected. The motor sealing ring 8 is located at the left end of the receiving cavity 61 and can be fixed by screws to connect the left end of the receiving cavity 61 and the drive motor 1 respectively. The sealing ring 9 is located at the right end of the receiving cavity 61. The two ends of the receiving cavity 61 are sealed by the motor sealing ring 8 and the sealing ring 9 respectively, so that the lubricating oil is contained inside the receiving cavity 61 to prevent the lubricating oil from leaking out. At the same time, the injection seat 6 has a special structure, which not only fixes the output end 11 of the drive motor 1, the transmission shaft 2, the single-row tapered bearing 3, the deep groove ball bearing 4, the thrust self-aligning bearing 5 and the injection seat 6, but also provides lubrication for them.

[0054] Preferably, at least one of the motor sealing ring 8, the sealing ring 9, and the receiving cavity 61 is provided with an oil inlet hole 101 and / or an oil outlet hole 102.

[0055] The oil inlet 101 is used to input lubricating oil from the outside into the cavity 61; the oil outlet 102 is used to discharge the lubricating oil inside the cavity 61 to the outside of the cavity 61; the lubricating oil level can be set by the cooperation of the oil inlet 101 and the oil outlet 102; generally, the lubricating oil level is lower than the center of the sol screw 7, and at this position, the output end 11 of the drive motor 1, the drive shaft 2, the single-row tapered bearing 3, the deep groove ball bearing 4 and the thrust self-aligning bearing 5 can be lubricated and cooled at the same time.

[0056] Preferably, the oil inlet 101 is located above at least one of the output end 11 of the drive motor 1, the transmission shaft 2, the single-row tapered bearing 3, the deep groove ball bearing 4, and the thrust self-aligning bearing 5.

[0057] In the embodiment where lubricating oil is added from bottom to top, the lubricating oil level has already reached the designated position before it can enter the interior of the component. When the lubricating oil enters the interior of the component, the lubricating oil level drops, and the contact area between the lubricating oil and the component decreases. When the oil inlet 101 is located above at least one of the following: the output end 11 of the drive motor 1, the transmission shaft 2, the single-row tapered bearing 3, the deep groove ball bearing 4, and the thrust self-aligning bearing 5, that is, the oil inlet 101 is located above each component to be lubricated, when lubricating oil is added through the oil inlet 101, the lubricating oil will first contact the surface of the corresponding component below, allowing the lubricating oil to enter the interior of the component and pre-lubricate it. After the lubricating oil reaches the designated level in the receiving cavity 61, the interior of each component is pre-lubricated, so after the lubricating oil level stabilizes, the level change is small after a period of time, and the contact area between the lubricating oil and the component remains unchanged.

[0058] Preferably, the receiving cavity 61 includes: a long diameter end 611 and a short diameter end 613;

[0059] The diameter of the long end 611 is greater than the diameter of the short end 613; the oil drain hole 102 is provided below the long end 611.

[0060] like Figure 4 and Figure 5 The receiving cavity 61 includes a long diameter end 611 and a short diameter end 613. Since the diameter of the long diameter end 611 is greater than that of the short diameter end 613, the lower part of the long diameter end 611 is lower than the lower part of the short diameter end 613. The lubricating oil remaining at the short diameter end 613 can fall directly to the long diameter end 611 and be discharged directly from the oil drain hole 102 at the long diameter end 611. The discharge rate is higher, preventing residual lubricating oil from affecting the performance of the machine.

[0061] Preferably, the long diameter end 611 is connected to the drive motor 1; the short diameter end 613 surrounds the transmission shaft 2; the short diameter end 613 transitions to the long diameter end 611 through an inclined surface 612.

[0062] The lubricating oil at the short diameter end 613 can fall down the inclined surface 612 to the long diameter end 611; and the oil drain hole 102 at the long diameter end 611 is just aligned with the bottom of the inclined surface 612, so the lubricating oil can directly enter the oil drain hole 102 after being discharged, resulting in higher oil discharge efficiency.

[0063] An injection molding machine includes: a sol screw 7 and a transmission structure as described in any of the above embodiments;

[0064] The sol screw 7 is coupled to the transmission shaft 2, and the drive motor 1 is used to drive the transmission shaft 2 to rotate, thereby driving the sol screw 7 to rotate.

[0065] Preferably, it further includes: an injection-molded base 103;

[0066] The injection base 6 has a movable block 62 at its bottom; the injection base 103 has a movable track 104; the movable block 62 is movably engaged with the movable track 104, so that the injection base 6 can move movably on the injection base 103.

[0067] The injection base 6 can move relative to the moving track 104, which facilitates the movement of the transmission structure and is combined with the injection molding process of the injection molding machine, thus facilitating the relative displacement between the sol screw 7 and the sol barrel.

[0068] The technical principles of the present invention have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of the invention and should not be construed as limiting the scope of protection of the invention in any way. Based on this explanation, those skilled in the art can readily conceive of other specific embodiments of the invention without inventive effort, and these embodiments will all fall within the scope of protection of the present invention.

Claims

1. A transmission structure for an injection molding machine, characterized in that, include: Drive motor, transmission shaft, single-row tapered roller bearing, deep groove ball bearing, thrust self-aligning bearing, injection mount, motor seal ring and sealing ring; One end of the drive shaft is coaxially connected to the output end of the drive motor, and the other end is used to connect to the sol-gel screw; the inner rings of the single-row tapered bearing, the thrust self-aligning bearing, and the deep groove ball bearing are coaxially mounted on the outside of the drive shaft, and the outer rings of the three are mounted on the injection seat; The injection station is provided with a receiving cavity; The outer rings of the single-row tapered roller bearing, the thrust self-aligning bearing, and the deep groove ball bearing are installed in the receiving cavity; the receiving cavity is sealed at both ends; the interior of the receiving cavity is used to contain lubricating oil; At least one of the output end of the drive motor, the transmission shaft, the single-row tapered bearing, the deep groove ball bearing, and the thrust self-aligning bearing is in contact with the lubricating oil. The drive motor has its output end extending into the receiving cavity; one end of the receiving cavity is connected to the drive motor, and the other end is sleeved on the outside of the transmission shaft; the motor sealing ring is disposed between the drive motor and the receiving cavity; the sealing ring is sleeved on the outside of the transmission shaft and fixed to the other end of the receiving cavity; the receiving cavity is internally sealed by at least the motor sealing ring and the sealing ring, so that the inside of the receiving cavity forms a space for holding the lubricating oil; At least one of the motor sealing ring, the sealing ring, and the receiving cavity is provided with an oil inlet and / or an oil outlet; the oil inlet is located above the output end of the drive motor, the transmission shaft, the single-row tapered bearing, the deep groove ball bearing, and the thrust self-aligning bearing. The single-row tapered bearing, thrust self-aligning bearing, and deep groove ball bearing are located in the same straight line; The receiving cavity includes: a long diameter end and a short diameter end; The diameter of the long end is greater than the diameter of the short end; the oil drain hole is provided below the long end; The long diameter end is connected to the drive motor; the short diameter end surrounds the drive shaft; the short diameter end transitions to the long diameter end via an inclined surface.

2. An injection molding machine, characterized in that, include: Sol-gel screw and transmission structure as described in claim 1; The sol screw is coupled to the drive shaft, and the drive motor is used to drive the drive shaft to rotate, thereby driving the sol screw to rotate.

3. The injection molding machine according to claim 2, characterized in that, Also includes: Injection molded base; The injection unit has a movable block at its bottom; the injection base has a movable track; the movable block is movably engaged with the movable track, allowing the injection unit to move movably on the injection base.

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