Motor structure for injection table of injection molding machine

Abstract

The utility model belongs to the technical field of injection structures of injection molding machines, and provides a motor structure for an injection table of an injection molding machine, which comprises a head plate, a charging barrel, an injection seat, an injection oil cylinder and a motor, the charging barrel is positioned between the head plate and the injection seat, one end of the charging barrel is connected with the head plate, the other end of the charging barrel is connected with the injection seat, a screw is arranged in the charging barrel, and the injection oil cylinder is connected with the motor. One end of the screw is connected with the motor. Compared with the prior art, the utility model has the advantages that the outer shell is arranged on the outer side of the second shell of the motor, the connecting hole is arranged in the motor, and the coupling and the push shaft are arranged on the connecting hole; the axial force applied to the motor can be applied to the shell and the push shaft and the coupling which are arranged on the connecting hole, so that a sealing layer formed by the rotor and the stator of the motor and the first shell and the second shell is not damaged, and the leakage of the cooling liquid in the accommodating cavity is prevented.

Description

Technical Field

[0001] The utility model belongs to the technical field of injection structures of injection molding machines, and in particular relates to a motor structure used for a shooting platform of an injection molding machine. Background Art

[0002] In today's life, the demand for various products is increasing. The previous manual or semi-mechanical production methods have low production efficiency and can no longer meet market demand. Injection molding machines appear under such circumstances. They can produce products in large quantities, greatly improving the production efficiency of some products so that they can meet market demand. Injection molding machines generally include a clamping system and an injection system. However, in the prior art, there are still many problems with the injection system.

[0003] Because the torque required by the screw during injection molding is relatively large, a high-power motor is required to drive the screw to rotate. In order to prevent the motor from being damaged by overheating, two layers of shells are set on the motor. The two layers of shells form a sealed chamber for filling coolant and other cooling liquids, thereby protecting the motor and improving the service life of the motor. However, the piston rod of the injection cylinder will cause an axial force to the motor when pushing the motor to move (so that the screw discharges the molten material into the mold cavity through the injection hole). After long-term movement, the axial force will cause damage to the rotor and stator of the motor, and the sealing layer is easily bent by force, causing leakage of coolant, etc., which requires a lot of time and effort to maintain and repair the motor. Summary of the invention

[0004] The technical problem to be solved by the utility model is to provide a motor structure for an injection molding machine shooting table which will not apply axial force to a rotor, a stator and a place where cooling liquid is stored, in view of the current status of the prior art.

[0005] The technical solution adopted by the utility model to solve the above technical problems is: a motor structure for an injection molding machine shooting platform is proposed, including: a head plate, a barrel, an injection seat, an injection cylinder and a motor, the barrel is located between the head plate and the injection seat, and one end of the barrel is connected to the head plate, and the other end of the barrel is connected to the injection seat, a screw is arranged in the barrel, one end of the screw is connected to the motor, the motor is movably arranged on the injection seat, and can drive the screw to rotate, the injection cylinder is used to drive the screw to move along the axial direction of the barrel, wherein,

[0006] A cavity is formed on the housing of the motor, and the cavity is used to fill the cooling liquid. A shell is sleeved on the outer side of the motor, and the shell is connected to the piston rod of the injection cylinder.

[0007] When the injection cylinder pushes the motor to move toward the head plate, the piston rod of the injection cylinder applies an axial force to the housing.

[0008] In the above-mentioned motor structure for the shooting platform of an injection molding machine, a connecting hole and a push shaft are arranged in the motor, a coupling is provided on the connecting hole, the coupling is connected to the screw, the push shaft is movably arranged in the connecting hole, one end of the push shaft abuts against the coupling, and the other end of the push shaft abuts against the outer shell.

[0009] In the above-mentioned motor structure for an injection molding machine shooting table, the motor includes a rotor, a stator, a first shell and a second shell, the second shell is arranged on the first shell, and the second shell and the first shell enclose the cavity, and the cavity is used to add cooling liquid; the stator and the rotor are both located in the first shell, the stator is fixed on the first shell and is located on the outside of the rotor, the rotor is rotatably connected to the first shell through a bearing, and the rotor can rotate relative to the stator; the coupling is rotatably connected to the outer shell through a bearing, the connecting hole is opened in the rotor, and when the rotor rotates, the screw can be driven to rotate through the coupling.

[0010] In the above-mentioned motor structure for the injection molding machine shooting table, the connection hole is provided with an inner spline on the inner side wall close to the head plate, and the coupling is provided with an outer spline, and the inner spline is connected to the outer spline.

[0011] In the above-mentioned motor structure for the shooting platform of an injection molding machine, a limiting groove is provided on the inner wall of the outer shell close to the injection cylinder, a wear-resistant plate is arranged on the limiting groove, a through hole is provided on the first shell, and the end of the push shaft extends out of the through hole and abuts against the wear-resistant plate.

[0012] In the above-mentioned motor structure for the shooting platform of an injection molding machine, the outer wall of one end of the first shell is abutted against the inner wall of one end of the outer shell through the coupling, and a gap is formed between the outer wall of the other end of the first shell and the inner wall of the other end of the outer shell, and the end of the push shaft away from the coupling passes through the through hole and is in the gap and abuts against the wear-resistant plate.

[0013] In the above-mentioned motor structure for the shooting platform of an injection molding machine, a guide column is arranged on the injection seat, a guide hole is arranged on the shell, and the guide hole is sleeved on the guide column.

[0014] In the above-mentioned motor structure for the shooting platform of an injection molding machine, a guide rail is arranged on the injection seat, a slider is arranged on the housing, and the slider is slidably connected to the guide rail.

[0015] Compared with the prior art, the advantage of the utility model lies in that an outer shell is arranged on the outside of the second shell of the motor, and a connecting hole is arranged in the motor, a coupling and a push shaft are installed on the connecting hole, and when the piston rod of the injection cylinder pushes the motor to move horizontally, the axial force given to the motor will be applied to the outer shell and the push shaft and the coupling arranged on the connecting hole, thereby ensuring that the rotor and stator of the motor and the sealing layer formed by the first shell and the second shell will not be damaged, preventing leakage of the coolant in the cavity, thereby effectively improving the working efficiency of the injection shooting platform and reducing maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of the motor used for the injection molding machine shooting platform;

[0017] Figure 2 This is a cross-sectional view of the motor structure used for the injection molding machine shooting platform;

[0018] Figure 3 This is an exploded view of the motor structure used for the injection molding machine shooting table;

[0019] Figure 4 is a cross-sectional view of the motor;

[0020] Figure 5 This is an exploded diagram of the motor structure.

[0021] In the figure,

[0022] 1. Head plate; 2. Barrel; 200. Screw; 3. Injection seat; 300. Guide column; 301. Guide rail; 4. Injection cylinder; 5. Motor; 500. Housing; 501. Connecting hole; 502. Push shaft; 503. Coupling; 504. Rotor; 505. Stator; 506. First housing; 507. Internal spline; 508. External spline; 509. Limiting groove; 510. Wear-resistant sheet; 511. Through hole; 512. Gap; 513. Guide hole; 514. Slider; 515. Second housing; 516. Cavity. DETAILED DESCRIPTION

[0023] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0024] like Figures 1 to 5 As shown, the structure of the motor 5 used for the injection molding machine shooting platform includes: a head plate 1, a barrel 2, an injection seat 3, an injection cylinder 4 and a motor 5.

[0025] Specifically, the head plate 1 is located on one side of the injection seat 3, and the barrel 2 is located between the head plate 1 and the injection seat 3, and the discharge port at one end of the barrel 2 is connected to the injection hole of the head plate 1, and the other end of the barrel 2 is connected to the injection seat 3. A screw 200 is provided in the barrel 2, and one end of the screw 200 is connected to the motor 5. The motor 5 is movably arranged on the injection seat 3 and can drive the screw 200 to rotate, so that when the injection cylinder 4 is actuated, the piston rod of the injection cylinder 4 can drive the motor 5 to move along the direction of the head plate 1 on the injection seat 3, so that the screw 200 moves along the axial direction of the barrel 2, and the molten material is injected into the injection hole of the head plate 1. In this embodiment, the motor 5 is configured as a hollow motor 5. Since the torque required by the screw 200 is relatively large, a high-power hollow motor 5 is required to drive The movable screw 200 rotates, and in order to prevent the motor 5 from being damaged by overheating, a cavity 516 is formed on the shell of the motor 5. The cavity 516 is used to add cooling liquid such as coolant, thereby protecting the driving components in the motor and playing a cooling role. Among them, the outer side of the motor 5 is provided with a shell 500, and the shell 500 is connected to the piston rod of the injection cylinder 4. When the injection cylinder 4 is started, the piston rod of the injection cylinder 4 pushes the motor 5 to move toward the head plate 1. The axial force applied by the piston rod of the injection cylinder 4 to the motor 5 will be applied to the outer shell 500 outside the motor 5, so that the axial force will not be applied to the motor 5, which can prevent the cavity for storing the cooling liquid of the motor 5 and the driving components of the motor 5 from being damaged, thereby playing a protective role and reducing maintenance costs.

[0026] Specifically, Figure 3 and Figure 5 As shown, a connecting hole 501 and a push shaft 502 are provided in the motor 5, a coupling 503 is provided on the connecting hole 501, the coupling 503 is connected to the screw 200, and the push shaft 502 is movably arranged in the connecting hole 501, one end of the push shaft 502 abuts against the coupling 503, and the other end of the push shaft 502 abuts against the housing 500.

[0027] Since the axial force borne by the middle part of the shell 500 is limited, in order to prevent the shell 500 from being damaged, a coupling 503 and a push shaft 502 are provided on the connecting hole 501 of the motor 5. When the injection cylinder 4 is started, the piston rod of the injection cylinder 4 pushes the motor 5 to move toward the head plate 1. The piston rod of the injection cylinder 4 will apply an axial force to the shell 500 and the push shaft 502. A part of the axial force will be transmitted to the coupling 503 through the push shaft 502, thereby protecting the shell 500.

[0028] Specifically, Figure 3 and Figure 5As shown, the motor 5 includes a rotor 504, a stator 505, a first shell 506 and a second shell 506, the second shell 506 is arranged on the first shell 506, and the first shell 506 and the second shell 506 are surrounded by a cavity 516, and the cavity 516 is used to add cooling liquid; the stator 505 and the rotor 504 are both located in the first shell 506, the stator 505 is fixed on the first shell 506 and is located on the outside of the rotor 504, the rotor 504 is rotatably connected to the first shell 506 through a bearing, and the rotor 504 can rotate relative to the stator 505; the coupling 503 is rotatably connected to the housing 500 through a bearing, and a connecting hole 501 is opened in the rotor 504, and when the rotor 504 rotates, the screw 200 can be driven to rotate through the coupling 503.

[0029] In this embodiment, the motor 5 used for the injection molding machine shooting table has a three-layer shell as a whole. The outermost shell (that is, the outer shell 500) is used to connect with the piston rod of the injection cylinder 44, and the first shell 506 and the second shell 515 in the outer shell 500 are interconnected to enclose a sealed cavity 516, and the cavity 516 is used to add coolant and other cooling liquids. The driving components of the motor 5 are the rotor 504 and the stator 505, and the cooling device of the motor 5 is the cavity 516 formed by the first shell 506 and the second shell 506. After the motor 5 is started, the rotor 504 will rotate relative to the stator 505, thereby driving the coupling 503 to rotate. The bearing can reduce the friction coefficient between the components. The heat generated during the rotation of the rotor 504 relative to the stator 505 will be absorbed by the coolant in the cavity 516, thereby increasing the service life of the entire motor. When the coupling 503 rotates, the material in the barrel 2 is melted and the molten plastic liquid is sent to the discharge port of the barrel 2. The piston rod of the injection cylinder 4 pushes the motor 5 toward the head plate 1 and sends the material liquid into the injection hole of the head plate 1 to complete the injection. The axial force applied by the piston rod of the injection cylinder 4 to the motor 5 will be transmitted to the coupling 503 through the outer casing 500 sleeved on the outside of the motor 5 and the push shaft 502 arranged in the connecting hole 501, so that the axial force will not be applied to the stator 505 and the rotor 504 of the motor 5, thereby playing a protective role.

[0030] Furthermore, if Figures 2 to 5 As shown, the connection hole 501 is provided with an inner spline 507 on the inner side wall close to the head plate 1 , and the coupling 503 is provided with an outer spline 508 , and the inner spline 507 is connected to the outer spline 508 .

[0031] The connection using the internal spline 507 and the external spline 508 can allow the coupling 503 to be better installed on the rotor 504. The rotor 504 can stably drive the coupling 503 to rotate, and the spline teeth of the internal spline 507 and the spline grooves of the external spline 508 are both arranged along the moving direction of the piston rod. The external spline 508 is inserted into the internal spline 507. When the piston rod of the subsequent injection cylinder 4 applies axial force to the motor 5, the push shaft 502 can transmit the force to the coupling 503, and then cooperate with the outer shell 500 to absorb the axial force.

[0032] Furthermore, if Figures 2 to 5 As shown, a limiting groove 509 is provided on the inner wall of the shell 500 near the injection cylinder 4, and a wear-resistant sheet 510 is provided on the limiting groove 509. A through hole 511 is provided on the first shell 506, and the end of the push shaft 502 extends out of the through hole 511 and abuts against the wear-resistant sheet 510.

[0033] The piston rod of the injection cylinder 4 is connected to the outer wall of the housing 500 by screws. The axis of the wear-resistant sheet 510 and the axis of the piston rod are in a collinear line. The wear-resistant sheet 510 can share the pressure and friction, thereby preventing the housing 500, the push shaft 502 and the coupling 503 from being damaged due to long-term use.

[0034] Furthermore, if Figure 2 As shown, the outer wall of one end of the first shell 506 abuts against the inner wall of one end of the outer shell 500 through the coupling 503, and a gap 512 is formed between the outer wall of the other end of the first shell 506 and the inner wall of the other end of the outer shell 500. The end of the push shaft 502 away from the coupling 503 passes through the through hole 511 and is in the gap 512 and abuts against the wear-resistant plate 510.

[0035] When the piston rod of the injection cylinder 4 pushes the motor 5, the force cannot be applied to the rotor 504, the stator 505, the first shell 506 and the second shell 506 of the motor 5 due to the gap 512, but is absorbed by the outer shell 500 and the push shaft 502 in the connecting hole 501, thereby ensuring that the rotor 504, the stator 505 and the cavity 516 of the motor 5 will not be directly damaged by the axial force.

[0036] Specifically, Figure 1 As shown, a guide column 300 is provided on the injection seat 3 , and a guide hole 513 is provided on the housing 500 , and the guide hole 513 is sleeved on the guide column 300 .

[0037] A plurality of guide columns 300 are arranged on the injection seat 3, and a plurality of guide holes 513 are correspondingly opened on the outer shell 500. The connection between the guide columns 300 and the guide holes 513 can provide guidance for the motor 5 to move on the injection seat 3, ensuring that the screw 200 smoothly injects the slurry into the injection hole of the head plate 1.

[0038] Furthermore, if Figure 1 As shown, a guide rail 301 is provided on the injection seat 3 , and a slider 514 is provided on the housing 500 , and the slider 514 is slidably connected to the guide rail 301 .

[0039] A stack of guide rails 301 are provided on the injection seat 3, and a group of sliders 514 are correspondingly provided on the first shell 506. The guide rails 301 and the sliders 514 cooperate to enable the piston rod of the injection cylinder 4 to push the motor 5 and the screw 200 connected to the motor 5 to move more stably along the axial direction of the barrel 2.

[0040] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0041] In addition, in the present invention, the descriptions of "first", "second", "one", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0042] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

Claims

1. A motor structure for an injection molding machine shooting platform, characterized in that: include: A head plate, a barrel, an injection seat, an injection cylinder and a motor, wherein the barrel is located between the head plate and the injection seat, and one end of the barrel is connected to the head plate, and the other end of the barrel is connected to the injection seat. A screw is arranged in the barrel, and one end of the screw is connected to the motor. The motor is movably arranged on the injection seat and can drive the screw to rotate. The injection cylinder is used to drive the screw to move along the axial direction of the barrel, wherein: A cavity is formed on the housing of the motor, and the cavity is used to fill the cooling liquid. A shell is sleeved on the outer side of the motor, and the shell is connected to the piston rod of the injection cylinder. When the injection cylinder pushes the motor to move toward the head plate, the piston rod of the injection cylinder applies an axial force to the housing.

2. The motor structure for the injection molding machine shooting platform according to claim 1, characterized in that: A connecting hole and a push shaft are arranged in the motor, a coupling is arranged on the connecting hole, the coupling is connected to the screw rod, the push shaft is movably arranged in the connecting hole, one end of the push shaft abuts against the coupling, and the other end of the push shaft abuts against the shell.

3. The motor structure for the injection molding machine shooting platform according to claim 2, characterized in that: The motor includes a rotor, a stator, a first shell and a second shell, the second shell is arranged on the first shell, and the second shell and the first shell enclose the cavity, and the cavity is used to fill the cooling liquid; the stator and the rotor are both located in the first shell, the stator is fixed on the first shell and is located on the outside of the rotor, the rotor is rotatably connected to the first shell through a bearing, and the rotor can rotate relative to the stator; the coupling is rotatably connected to the outer shell through a bearing, the connecting hole is opened in the rotor, and the screw can be driven to rotate through the coupling when the rotor rotates.

4. The motor structure for the injection molding machine shooting platform according to claim 3 is characterized in that: The connection hole is provided with an internal spline on the inner side wall close to the head plate, and the coupling is provided with an external spline, and the internal spline is connected to the external spline.

5. The motor structure for the injection molding machine shooting platform according to claim 3, characterized in that: A limiting groove is provided on the inner side wall of the shell near the injection cylinder, and a wear-resistant sheet is arranged on the limiting groove. A through hole is provided on the first shell, and the end of the push shaft extends out of the through hole and abuts against the wear-resistant sheet.

6. The motor structure for the injection molding machine shooting platform according to claim 5, characterized in that: The outer wall of one end of the first shell abuts against the inner wall of one end of the outer shell through the coupling, and a gap is formed between the outer wall of the other end of the first shell and the inner wall of the other end of the outer shell. The end of the push shaft away from the coupling passes through the through hole and is in the gap and abuts against the wear-resistant plate.

7. The motor structure for the injection molding machine shooting platform according to claim 1, characterized in that: The injection seat is provided with a guide column, the shell is provided with a guide hole, and the guide hole is sleeved on the guide column.

8. The motor structure for the injection molding machine shooting platform according to claim 7, characterized in that: A guide rail is arranged on the injection seat, a slider is arranged on the shell, and the slider is slidably connected to the guide rail.

Images