Belt wheel transmission injection structure

Abstract

The utility model relates to the field of injection machines, and discloses a belt wheel transmission injection structure which comprises an injection support, a machine barrel fixed on the injection support and a screw concentrically inserted with the machine barrel, and a driving assembly for driving the screw to reciprocate along the axial direction of the machine barrel and a rotating assembly for driving the screw to rotate are arranged between the injection support and the screw. The rotating assembly comprises a second synchronizing wheel rotationally connected to the injection support and arranged outside the screw in a sleeving mode, a motor fixedly arranged below the injection support and a transmission structure arranged between the second synchronizing wheel and the motor and used for driving the second synchronizing wheel to rotate, and the second synchronizing wheel and the screw synchronously rotate and can relatively slide in the axial direction of the screw; according to the injection structure, the motor is fixed to the lower portion of the injection support, and the second synchronous wheel is rotationally connected to the injection support, so that when the screw linearly moves for injection and reinjection, the motor, the transmission structure and the second synchronous wheel cannot move in the axial direction of the machine barrel, and interference with a hopper is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to injection molding machine field especially relates to a wheel transmission injection structure. BACKGROUND

[0002] The injection mechanism in the injection molding machine is mainly through the driving screw to make the rotation and linear reciprocating motion, so as to achieve the purpose of plasticizing and outputting the plastic.

[0003] The Chinese patent with the application number 202321874599.2 discloses an injection molding machine glue injection structure, which comprises a frame body (injection support) and a fixed seat arranged on the frame body through a linear slide rail, and further comprises a barrel screw assembly, the barrel screw assembly comprises a barrel (barrel) fixed on the frame body and a screw; a glue driving assembly, the glue driving assembly comprises a power element, the power element is a servo motor horizontally fixed on the fixed seat, the output end of the servo motor is provided with a first synchronous gear (first synchronous wheel); a connecting piece (injection table rear plate), one end of the connecting piece is rotatably provided with a second synchronous gear (second synchronous wheel), the second synchronous gear is connected with the screw, the second synchronous gear rotates to drive the screw to rotate, and the bottom of the fixed seat is fixedly connected with the upper end surface of the connecting piece; a synchronous belt, connecting the first synchronous gear and the second synchronous gear; an injection assembly, comprising a piston, one end of the piston is connected with the other end of the connecting piece; an oil cylinder, the oil cylinder is movably connected with the other end of the piston, and the oil cylinder drives the piston to make reciprocating motion.

[0004] The above-mentioned scheme drives the first synchronous wheel 8 to rotate through the motor 7, transmits power to the second synchronous wheel 9 through the synchronous belt 10, and drives the screw 6 to rotate through the rotation of the second synchronous wheel 9; the motor 7, the first synchronous wheel 8, the synchronous belt 10 and the second synchronous wheel 9 form a rotating assembly for driving the screw 6 to rotate; the oil cylinder 5 can also drive the piston to make reciprocating motion, and drive the injection table rear plate 3 and the screw 6 connected with the injection table rear plate 3 to make reciprocating linear motion. Since the fixed seat 27 is fixed above the injection table rear plate 3, and the motor 7 is horizontally fixed on the fixed seat 27, when the screw 6 moves linearly, the fixed seat 27 and the rotating assembly move linearly.

[0005] However, in the actual application process, the upper side of the barrel 2 close to the injection support 1 is provided with a hopper 26 for adding raw materials into the barrel 2, which can be specifically referred to Figure 1 and Figure 2 When the screw 6 moves linearly for injection or ejection, the synchronously moving fixed seat 27 and rotating assembly may interfere with the hopper 26, which can be referred to Figure 3 . UTILITY MODEL CONTENTS

[0006] The utility model discloses a wheel drive injection structure which is not interfered with the hopper.

[0007] In order to solve the above technical problems, the utility model through the following technical schemes solves:

[0008] A wheel drive injection structure, including injection support, fixed on the injection support machine cylinder and with the concentric plug-in screw rod, injection support and screw rod between setting drive screw rod along the machine cylinder axial reciprocating movement drive assembly and drive screw rod rotation rotation component, rotation component includes rotation connection on the injection support and cover set in the screw rod outside Second synchronous wheel, fixedly arranged below the injection support motor and between second synchronous wheel and motor setting drive second synchronous wheel rotation transmission structure, second synchronous wheel and screw rod synchronous rotation and both can axial relative sliding of screw rod.

[0009] Adopt the above scheme, second synchronous wheel and screw rod synchronous rotation, therefore, motor can drive second synchronous wheel rotation through transmission structure, thereby driving screw rod rotation. Motor is fixed below the injection support, and second synchronous wheel rotation is connected on the injection support, and second synchronous wheel and screw rod can axial relative sliding of screw rod, therefore, when screw rod linearly moves along the machine cylinder axial injection and retreats, motor, transmission structure and second synchronous wheel all will not move along the axial direction of machine cylinder, thereby avoiding interference with the hopper.

[0010] As preferred, the injection support is fixedly provided with a mounting frame, a rotating member concentric with the screw rod and through which the screw rod passes is rotationally connected in the mounting frame, the second synchronous wheel is fixedly sleeved on the outer ring wall of the rotating member, and the inner wall of the rotating member is protrudingly provided with a guide block, and the outer wall of the screw rod is recessed to be provided with a guide groove into which the guide block is inserted and linearly slides with the guide block.

[0011] Adopt the above scheme, mounting frame is fixedly installed on the injection support, rotating member is rotationally connected on the mounting frame, and second synchronous wheel is fixedly sleeved on the rotating member, so as to realize that second synchronous wheel is rotationally connected on the injection support. The rotating member is provided through the screw rod and concentric with the screw rod, the guide block and the guide groove are inserted and guided to slide, the rotating member and the screw rod are realized synchronous rotation and axial relative sliding of the screw rod, and finally the second synchronous wheel and the screw rod are realized synchronous rotation and axial relative sliding of the screw rod.

[0012] As preferred, the transmission structure comprises a first synchronous wheel concentrically and fixedly arranged on the output end of the motor and a synchronous belt sleeved on the first synchronous wheel and the second synchronous wheel.

[0013] Adopt the above scheme, motor drives first synchronous wheel rotation, and second synchronous wheel rotation is driven through synchronous belt.

[0014] Preferably, an adjusting structure is arranged between the motor and the injection support to control the lifting of the motor to adjust the tightness of the synchronous belt.

[0015] With the above scheme, since the first synchronous wheel is fixedly installed on the output shaft of the motor, the lifting of the motor can be controlled to control the lifting of the first synchronous wheel, thereby adjusting the distance between the first synchronous wheel and the second synchronous wheel, and adjusting the tightness of the synchronous belt sleeved thereon.

[0016] Preferably, an assembling frame is fixedly arranged on the motor, and the adjusting structure comprises a mounting block protruding outward from a side wall of the assembling frame, an external threaded sleeve passing through the mounting block and being threadedly connected with the injection support at one end, and a locking bolt passing through the external threaded sleeve and being threadedly connected with the injection support at one end to limit the external threaded sleeve from being separated from the injection support. When the locking bolt is screwed, the external threaded sleeve is pressed against the injection support to limit the rotation of the external threaded sleeve, and when the locking bolt is unscrewed, the external threaded sleeve is allowed to rotate to drive the mounting block to vertically lift.

[0017] With the above scheme, when the lifting of the motor needs to be adjusted, the locking bolt is first unscrewed until the external threaded sleeve can rotate, and the rotation of the external threaded sleeve limits the rotation of the assembling frame, so that the mounting block and the assembling frame can be lifted close to or away from the injection support, thereby adjusting the distance between the first synchronous wheel and the second synchronous wheel to achieve the adjustment of the tightness of the synchronous belt. After the tightness of the synchronous belt is adjusted, the locking bolt is screwed to press the external threaded sleeve against the injection support to limit the rotation of the external threaded sleeve, so that the assembling frame is stationary relative to the injection support.

[0018] Preferably, at least one set of adjusting structures is uniformly and spacedly arranged around the assembling frame.

[0019] With the above scheme, one set of adjusting structures can achieve the adjustment, but when one set of adjusting structures is arranged, the assembling frame needs to be additionally limited to rotate synchronously with the external threaded sleeve when the external threaded sleeve is rotated, so as to ensure that the assembling frame vertically lifts. When two or more sets of adjusting structures are arranged, the assembling frame is automatically limited to rotate with the external threaded sleeve by the mutual cooperation of the multiple sets of adjusting structures.

[0020] Preferably, a fixing structure is arranged between the assembling frame and the injection support to increase the stability of the installation of the motor after the adjustment of the tightness of the synchronous belt is completed.

[0021] Preferably, the fixing structure comprises a supporting frame fixedly arranged at the bottom of the injection support, and a fixing bolt passing through the assembling frame and being threadedly connected with the supporting frame at one end. A waist round hole is arranged on the assembling frame to allow the assembling frame to slide along the lifting direction of the motor relative to the fixing bolt.

[0022] Using the above method, loosening the fixing bolts allows the assembly frame to be vertically raised and lowered relative to the support frame due to the presence of the oval hole, enabling adjustment of the tension of the synchronous belt. After adjustment, tightening the fixing bolts to fit tightly with the threads of the support frame restricts the raising and lowering of the assembly frame, further increasing the stability of the motor installation.

[0023] Preferably, at least one set of guide blocks and guide slots are evenly spaced around the screw circumference.

[0024] Using the above scheme, setting one set of guide blocks and guide grooves can realize the synchronous rotation and relative sliding of the rotating parts and the screw, and setting multiple sets can make the transmission between the two more stable.

[0025] This invention, by adopting the above technical solution, has significant technical advantages: the motor is fixed below the injection support, and the second synchronous pulley is rotatably connected to the injection support. Therefore, when the screw moves linearly for injection and retraction, the motor, transmission structure, and second synchronous pulley will not move along the axial direction of the barrel, thus avoiding interference with the hopper. Furthermore, the tension of the synchronous belt can be adjusted via an adjustable structure. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the injection structure in the prior art. Figure 1 ;

[0027] Figure 2 This is a schematic diagram of the injection structure in the prior art. Figure 2 ;

[0028] Figure 3 This is a schematic diagram of interference between the rotating component and the hopper in the existing injection structure.

[0029] Figure 4 This is a schematic diagram of a belt-driven injection structure in one embodiment. Figure 1 ;

[0030] Figure 5 yes Figure 4 Enlarged view of point A in the image;

[0031] Figure 6 This is a schematic diagram of a belt-driven injection structure in one embodiment. Figure 2 ;

[0032] Figure 7 yes Figure 6 Enlarged view of point B in the image;

[0033] Figure 8 This is a front view of a pulley-driven injection structure in one embodiment;

[0034] Figure 9 yes Figure 8 Sectional view at point C;

[0035] Figure 10 is Figure 9 is an enlarged view of D in

[0036] Figure 11 is a split view of an embodiment of a wheel drive injection structure;

[0037] Figure 12 is an enlarged view of E in Figure 11

[0038] Figure 13 is an enlarged view of F in Figure 11

[0039] Figure 14 is an enlarged view of G in Figure 11

[0040] The parts referred to by the reference numerals in the above figures are as follows: 1, injection support; 2, barrel; 3, back plate of injection table; 4, linear slide rail; 5, oil cylinder; 6, screw; 7, motor; 8, first synchronous wheel; 9, second synchronous wheel; 10, synchronous belt; 11, mounting frame; 12, rotating part; 13, bearing; 14, guide block; 15, guide groove; 16, assembly frame; 17, mounting block; 18, externally threaded sleeve; 19, threaded slot; 20, locking bolt; 21, locking threaded hole; 22, through hole; 23, support frame; 24, fixing bolt; 25, waist round hole; 26, hopper; 27, fixing seat. DETAILED DESCRIPTION

[0041] The utility model will be described in further detail below in combination with the drawings and embodiments.

[0042] Embodiment

[0043] A wheel drive injection structure, referring to Figures 4 to 14 , comprising injection support 1, one side of injection support 1 is fixed with barrel 2, back plate of injection table 3 is arranged in injection support 1 and moves reciprocatingly along the direction of approaching or moving away from barrel 2, and back plate of injection table 3 realizes the guided movement with linear slide rail 4. The movement of back plate of injection table 3 is controlled by oil cylinder 5, the cylinder body of oil cylinder 5 is fixed on the side of injection support 1 far from barrel 2, and the piston rod of oil cylinder 5 is connected with back plate of injection table 3. Back plate of injection table 3 is provided with screw 6 concentric with barrel 2, and the end of screw 6 far from back plate of injection table 3 is inserted into barrel 2.

[0044] ​​​A rotating assembly is arranged between the injection support 1 and the screw rod 6 to drive the screw rod 6 to rotate, and the rotating assembly comprises a motor 7 fixedly arranged below the injection support 1, and a first synchronous wheel 8 concentrically fixed on an output shaft of the motor 7. A mounting frame 11 is fixedly arranged in the injection support 1, and a rotating piece 12 concentric with the screw rod 6 is arranged in the mounting frame 11. The rotating piece 12 is rotatably connected to the mounting frame 11 through a bearing 13, and the screw rod 6 can pass through the rotating piece 12. The inner wall of the rotating piece 12 is protrudingly provided with a guide block 14, and the outer wall of the screw rod 6 is recessedly provided with a guide groove 15 for the guide block 14 to insert. After the guide block 14 is inserted into the guide groove 15, the rotating piece 12 and the screw rod 6 can rotate synchronously. The guide groove 15 extends along the axial direction of the screw rod 6, so as to ensure that the guide block 14 and the guide groove 15 are linearly slidably matched when the screw rod 6 moves along the axial direction of itself. At least one set of the guide block 14 and the guide groove 15 are uniformly and circumferentially spaced apart around the screw rod 6. In the embodiment, the rotating piece 12 and the guide block 14 are splines, and the guide groove 15 is a spline groove arranged on the outer ring wall of the screw rod 6 and matched with the splines. A second synchronous wheel 9 is concentrically sleeved on the outer ring wall of the rotating piece 12 located outside the mounting frame 11, and the second synchronous wheel 9 is fixedly connected with the rotating piece 12. The first synchronous wheel 8 and the second synchronous wheel 9 are sleeved and tensioned with a synchronous belt 10.

[0045] The motor 7 is fixedly connected with an assembling frame 16 on the side close to the first synchronous wheel 8. Symmetrical two side walls of the assembling frame 16 are outwardly protrudingly provided with mounting blocks 17 respectively. An outer threaded sleeve 18 is vertically arranged on each mounting block 17, and one end of the outer threaded sleeve 18 passes through the mounting block 17 and is attached to the injection support 1. The outer threaded sleeve 18 is threadedly connected with the mounting block 17, and the mounting block 17 is provided with a threaded through slot 19 for the outer threaded sleeve 18 to insert and threadedly match. An locking bolt 20 is vertically arranged on each outer threaded sleeve 18, and one end of the locking bolt 20 passes through the outer threaded sleeve 18 and is threadedly connected with the injection support 1. The locking bolt 20 limits the outer threaded sleeve 18 from being separated from the injection support 1. The injection support 1 is provided with a locking threaded hole 21 threadedly matched with the screw rod of the locking bolt 20. The outer threaded sleeve 18 is provided with a through hole 22 for the bolt rod of the locking bolt 20 to pass through and limiting the bolt head of the locking bolt 20 to pass through. When the locking bolt 20 is screwed, the outer threaded sleeve 18 is pressed against the injection support 1 to limit the rotation of the outer threaded sleeve 18. When the locking bolt 20 is unscrewed, the outer threaded sleeve 18 is allowed to rotate to drive the mounting block 17 to vertically ascend and descend.

[0046] A supporting frame 23 is fixedly arranged at the bottom of the injection support 1, and the supporting frame 23 is parallel to and attached to the assembling frame 16. A fixed screw 24 is threadedly connected with the supporting frame 23 after one end of the fixed screw 24 passes through the assembling frame 16. The assembling frame 16 is provided with a waist round hole 25 for the fixed screw 24 to pass through, and the waist round hole 25 allows the assembling frame 16 to slide along the lifting direction of the motor 7 relative to the fixed screw 24.

[0047] The motor 7 drives the first synchronous wheel 8 to rotate, the second synchronous wheel 9 is driven to rotate through the synchronous belt 10, the rotating member 12 is driven to rotate, the screw rod 6 is driven to rotate through the inserted guide block 14 and the guide groove 15. The oil cylinder 5 drives the rear plate 3 of the injection platform to move, and drives the screw rod 6 to move linearly. Since the guide block 14 and the guide groove 15 are linearly slidable, the screw rod 6 moves linearly along the axial direction of the rotating member 12. The motor 7, the first synchronous wheel 8, the synchronous belt 10 and the second synchronous wheel 9 will not move along the axial direction of the machine barrel 2, thereby avoiding interference with the hopper 26.

[0048] When the tightness of the synchronous belt 10 needs to be adjusted, the locking bolt 20 is loosened until the outer threaded sleeve 18 can rotate, and then the fixing bolt 24 is loosened until the assembly frame 16 can be lifted. The outer threaded sleeve 18 is rotated, and the assembly frame 16 is lifted to approach or move away from the injection support 1, so as to adjust the distance between the first synchronous wheel 8 and the second synchronous wheel 9, and realize the tightness adjustment of the synchronous belt 10. After the tightness of the synchronous belt 10 is adjusted, the locking bolt 20 is tightened to press the outer threaded sleeve 18 on the injection support 1 to limit the rotation of the outer threaded sleeve 18, and finally the fixing bolt 24 is tightened to fix the assembly frame 16 on the support frame 23.

[0049] The above only describes preferred embodiments of the present application, and the protection scope of the present application is not limited to the above embodiments. Any technical solution falling within the concept of the present application belongs to the protection scope of the present application. It should be noted that, for ordinary skilled persons in the technical field, some improvements and decorations without departing from the principles of the present application are also considered to be within the protection scope of the present application.

Claims

1. A belt-driven injection structure, comprising an injection support (1), a barrel (2) fixed on the injection support (1), and a screw (6) concentrically inserted into the barrel (2), wherein a driving assembly for reciprocating the screw (6) along the axial direction of the barrel (2) and a rotating assembly for rotating the screw (6) are provided between the injection support (1) and the screw (6), characterized in that: The rotating assembly comprises a second synchronous wheel (9) rotatably connected to the injection support (1) and sleeved outside the screw rod (6), a motor (7) fixedly arranged below the injection support (1), and a transmission structure arranged between the second synchronous wheel (9) and the motor (7) and configured to drive the second synchronous wheel (9) to rotate, wherein the second synchronous wheel (9) rotates synchronously with the screw rod (6) and the two can axially slide relative to each other along the screw rod (6).

2. A wheel drive injection structure according to claim 1, characterized in that: The injection support (1) is fixedly provided with a mounting bracket (11), and a rotating member (12) concentric with the screw rod (6) and through which the screw rod (6) passes is rotatably connected in the mounting bracket (11), the second synchronous wheel (9) is fixedly sleeved on the outer ring wall of the rotating member (12), and the inner wall of the rotating member (12) is provided with a guide block (14), and the outer wall of the screw rod (6) is recessed to form a guide groove (15) into which the guide block (14) is inserted and linearly slides with the guide block (14).

3. A wheel drive injection structure according to claim 1, wherein: The transmission structure comprises a first synchronous wheel (8) concentrically and fixedly arranged on the output end of the motor (7) and a synchronous belt (10) sleeved on the first synchronous wheel (8) and the second synchronous wheel (9).

4. A wheel drive injection structure according to claim 3, wherein: The adjusting structure is arranged between the motor (7) and the injection support (1) and is configured to control the motor (7) to lift and lower to adjust the tightness of the synchronous belt (10).

5. A wheeled injection structure according to claim 4, wherein: The motor (7) is fixedly provided with an assembly bracket (16), the adjusting structure comprises a mounting block (17) outwardly protruding from the side wall of the assembly bracket (16), an external threaded sleeve (18) having one end passing through the mounting block (17) and being in abutment with the injection support (1) and being threadedly connected with the mounting block (17), and a locking bolt (20) having one end passing through the external threaded sleeve (18) and being threadedly connected with the injection support (1) to limit the external threaded sleeve (18) from being separated from the injection support (1), wherein when the locking bolt (20) is tightened, the external threaded sleeve (18) is pressed against the injection support (1) to limit the rotation of the injection support (1), and when the locking bolt (20) is loosened, the external threaded sleeve (18) is allowed to rotate to drive the mounting block (17) to vertically lift and lower.

6. A wheeled injection structure according to claim 5, wherein: The adjusting structure is circumferentially and uniformly spaced with at least one group around the assembly bracket (16).

7. A wheeled injection structure according to claim 5, wherein: The fixing structure is arranged between the assembly bracket (16) and the injection support (1) and is configured to increase the mounting stability of the motor (7) after the tightness of the synchronous belt (10) is adjusted.

8. A wheeled injection structure according to claim 7, wherein: The fixing structure comprises a support bracket (23) fixedly arranged at the bottom of the injection support (1) and a fixing bolt (24) having one end passing through the assembly bracket (16) and being threadedly connected with the support bracket (23), and the assembly bracket (16) is provided with a waist round hole (25) through which the fixing bolt (24) passes and allowing the assembly bracket (16) to slide relative to the fixing bolt (24) along the lifting direction of the motor (7).

9. A wheel drive injection structure according to claim 2, wherein: The guide block (14) and the guide groove (15) are circumferentially and uniformly spaced with at least one group around the screw rod (6).

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