Injection equipment

Abstract

This invention provides an injection device, including a dispensing screw, an injection lead screw, a first power mechanism, and a second power mechanism. The first power mechanism is driven by the dispensing screw to drive it to rotate around its axis. The second power mechanism is driven by the injection lead screw to drive it to rotate around its axis. The injection device further includes a power conversion mechanism, which is connected to the first power mechanism. The power conversion mechanism can be selectively connected to either the dispensing screw or the injection lead screw, so that the first power mechanism drives either the dispensing screw or the injection lead screw to rotate under the action of the power conversion mechanism. This invention solves the problem of high cost in existing injection devices.

Description

Technical Field

[0001] This invention relates to the field of injection, and more specifically, to an injection device. Background Technology

[0002] The injection unit has two processes: melting and injection; it has two servo power systems: a servo power system for driving the screw and a servo power system for driving the injection screw.

[0003] During the melting process, the servo power system driving the screw operates simultaneously with the servo power system driving the injection screw to control the melt back pressure and screw position; at this time, the power is more than sufficient. During the injection process, the servo power system driving the screw stops, while the servo power system driving the injection screw operates.

[0004] It is evident that the servo power system was not fully utilized during the injection process, and the unit cost of the servo power system is high, accounting for a large proportion of the total cost. Summary of the Invention

[0005] The main objective of this invention is to provide an injection device to solve the problem of high cost of existing injection devices.

[0006] To achieve the above objectives, the present invention provides an injection device, including a dispensing screw, an injection lead screw, a first power mechanism, and a second power mechanism. The first power mechanism is driven to connect with the dispensing screw to drive the dispensing screw to rotate around its axis. The second power mechanism is driven to connect with the injection lead screw to drive the injection lead screw to rotate around its axis. The injection device further includes a power conversion mechanism, the first power mechanism being connected to the power conversion mechanism. The power conversion mechanism can be selectively connected to either the dispensing screw or the injection lead screw, so that the first power mechanism drives the dispensing screw to rotate or drives the injection lead screw to rotate under the action of the power conversion mechanism.

[0007] Furthermore, the power conversion mechanism includes an input section, a first output section, and a second output section. The input section can be selectively connected to either the first or second output section. The first power mechanism is connected to the input section. The first output section is connected to the glue injection screw. The second output section is connected to the glue injection lead screw.

[0008] Furthermore, the input section includes a first drive shaft and a first drive pulley, the first drive pulley is mounted on the first drive shaft, the first power mechanism is a first motor, and a first drive belt is fitted onto the output shaft of the first motor and the first drive pulley.

[0009] Furthermore, a first drive gear is provided on the first drive shaft, and the first output part includes a second drive shaft and a first drive gear, with the first drive gear disposed on the second drive shaft; the first drive gear is used to mesh with the first drive gear; the second drive shaft is connected to the glue injection screw.

[0010] Furthermore, a second transmission pulley is provided on the second transmission shaft, a third transmission pulley is provided on the glue injection screw, and a second transmission belt is fitted on the second and third transmission pulleys.

[0011] Furthermore, a second drive gear is provided on the first drive shaft, and the second output part includes a third drive shaft and a second drive gear, with the second drive gear being provided on the third drive shaft; wherein, the first drive gear meshes with the first drive gear, or the second drive gear meshes with the second drive gear.

[0012] Furthermore, a fourth transmission pulley is provided on the third transmission shaft, a fifth transmission pulley is provided on the injection screw, and a third transmission belt is fitted on the fourth and fifth transmission pulleys.

[0013] Furthermore, the injection device also includes a tensioning assembly, which includes a tensioning shaft and a tensioning wheel. The tensioning wheel is rotatably mounted on the tensioning shaft and pressed onto the third transmission belt. The tensioning assembly is mounted on the power conversion mechanism.

[0014] Furthermore, at least a portion of the tensioning assembly is adjustable to adjust the position of the tensioning wheel; and / or the tensioning wheel is located on the outer or inner side of the third drive belt; and / or there are multiple tensioning assemblies, and the positions of the multiple tensioning assemblies are adjustable.

[0015] Furthermore, the second power mechanism includes a second motor, a sixth transmission pulley is provided on the injection screw, and a fourth transmission belt is sleeved on the output shaft of the second motor and the sixth transmission pulley; and / or the power conversion mechanism also includes a conversion box, which includes a first sidewall and a second sidewall, one end of the input part and one end of the second output part both extend to the outside of the first sidewall, and one end of the first output part extends to the outside of the second sidewall.

[0016] By applying the technical solution of this invention, the injection device of this invention is equipped with a power conversion mechanism. The first power mechanism is connected to the power conversion mechanism, and the power conversion mechanism can be selectively connected to the injection screw or the injection lead screw, so that the first power mechanism drives the injection screw to rotate or drives the injection lead screw to rotate under the action of the power conversion mechanism. In this way, the two processes of driving the injection screw and driving the injection lead screw can be realized by the first power mechanism alone, which can make full use of the power of the first power mechanism and thus reduce production costs. Attached Figure Description

[0017] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0018] Figure 1 A schematic diagram of the overall structure from a first perspective of an embodiment of the injection device according to the present invention is shown;

[0019] Figure 2 It shows that according to Figure 1 An enlarged schematic diagram of area A of the injection device;

[0020] Figure 3 A second perspective schematic diagram of the overall structure of an embodiment of the injection device according to the present invention is shown;

[0021] Figure 4 A schematic diagram of the transmission structure on the first side wall of the change box according to an embodiment of the injection device of the present invention is shown;

[0022] Figure 5 It shows that according to Figure 4 A schematic diagram of the BB cross-section of the injection device;

[0023] Figure 6 A plan view of the change chamber of the injection device according to the present invention is shown;

[0024] Figure 7 It shows that according to Figure 6 A schematic diagram of the CC section of the injection equipment;

[0025] Figure 8 It shows that according to Figure 5 An enlarged schematic diagram of region D of the injection device.

[0026] The above figures include the following reference numerals:

[0027] 10. Injection screw; 20. Injection ball screw; 100. First power mechanism; 200. Second power mechanism; 201. Seventh transmission pulley; 30. Power conversion mechanism; 31. Input section; 32. First output section; 33. Second output section; 310. First transmission shaft; 311. First transmission pulley; 312. First transmission belt; 313. First drive gear; 320. Second transmission shaft; 321. First transmission gear; 322. Second transmission pulley; 323. Third transmission pulley; 324. Second transmission belt; 314. Second drive gear; 330. Third transmission shaft; 331. Second transmission gear; 332. Fourth transmission pulley; 210. Fifth transmission belt 333, Third transmission belt; 40, Tensioning assembly; 41, Tensioning shaft; 42, Tensioning pulley; 211, Sixth transmission belt pulley; 2100, Protrusion; 2101, Groove; 212, Fourth transmission belt; 34, Transformer box; 341, First sidewall; 342, Second sidewall; 334, First clutch; 325, Second clutch; 50, First base plate; 51, Second base plate; 501, Connecting block; 52, Third base plate; 54, Connecting assembly; 540, Locking nut; 541, Connecting column; 60, First mounting plate; 61, Second mounting plate; 70, Transmission end cover; 71, Bearing assembly; 72, Fourth transmission shaft; 73, Bearing seat; 74, Fastener. Detailed Implementation

[0028] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0029] Please refer to Figures 1 to 8 The present invention provides an injection device, including a dispensing screw 10, an injection lead screw 20, a first power mechanism 100, and a second power mechanism 200. The first power mechanism 100 is driven to connect with the dispensing screw 10 to drive the dispensing screw 10 to rotate around its axis. The second power mechanism 200 is driven to connect with the injection lead screw 20 to drive the injection lead screw 20 to rotate around its axis. The injection device further includes a power conversion mechanism 30. The first power mechanism 100 is connected to the power conversion mechanism 30. The power conversion mechanism 30 can be selectively connected to either the dispensing screw 10 or the injection lead screw 20 so that the first power mechanism 100 drives the dispensing screw 10 to rotate or drives the injection lead screw 20 to rotate under the action of the power conversion mechanism 30.

[0030] The injection device of the present invention is equipped with a power conversion mechanism 30. A first power mechanism 100 is connected to the power conversion mechanism 30. The power conversion mechanism 30 can be selectively connected to the injection screw 10 or the injection lead screw 20, so that the first power mechanism 100 drives the injection screw 10 to rotate or drives the injection lead screw 20 to rotate under the action of the power conversion mechanism 30. In this way, the two processes of driving the injection screw 10 and driving the injection lead screw 20 can be realized by the first power mechanism 100 alone, which can make full use of the power of the first power mechanism 100 and thus reduce production costs.

[0031] Specifically, the power conversion mechanism 30 includes an input section 31, a first output section 32, and a second output section 33. The input section 31 can be selectively connected to either the first output section 32 or the second output section 33. The first power mechanism 100 is connected to the input section 31, the first output section 32 is connected to the glue injection screw 10, and the second output section 33 is connected to the glue injection lead screw 20.

[0032] Optionally, the input unit 31 includes a first drive shaft 310 and a first drive pulley 311. The first drive pulley 311 is disposed on the first drive shaft 310. The first power mechanism 100 is a first motor. A first drive belt 312 is sleeved on the output shaft of the first motor and the first drive pulley 311.

[0033] Optionally, a third transmission gear is provided on the output shaft of the first motor, and the input part 31 includes a first transmission shaft 310 and a fourth transmission gear. The fourth transmission gear is provided on the first transmission shaft 310, and the third transmission gear and the fourth transmission gear mesh with each other.

[0034] In the embodiments of this application, a first drive gear 313 is provided on the first drive shaft 310, and the first output part 32 includes a second drive shaft 320 and a first drive gear 321. The first drive gear 321 is disposed on the second drive shaft 320; the first drive gear 313 is used to mesh with the first drive gear 321; and the second drive shaft 320 is connected to the glue injection screw 10.

[0035] Optionally, a first drive pulley is provided on the first drive shaft 310, and the first output part 32 includes a second drive shaft 320 and an eighth drive pulley. The eighth drive pulley is provided on the second drive shaft 320, and a fifth drive belt is wound around the first drive pulley and the eighth drive pulley. The second drive shaft 320 is connected to the glue injection screw 10 for transmission.

[0036] In the embodiments of this application, a second transmission pulley 322 is provided on the second transmission shaft 320, a third transmission pulley 323 is provided on the glue injection screw 10, and a second transmission belt 324 is sleeved on the second transmission pulley 322 and the third transmission pulley 323.

[0037] Specifically, a second drive gear 314 is provided on the first drive shaft 310, and the second output part 33 includes a third drive shaft 330 and a second drive gear 331, with the second drive gear 331 disposed on the third drive shaft 330; wherein, the position of the second output part 33 or the first output part 32 is adjustable so that the first drive gear 313 meshes with the first drive gear 321, or the second drive gear 314 meshes with the second drive gear 331.

[0038] Optionally, a second drive pulley is provided on the first drive shaft 310, and the second output part 33 includes a third drive shaft 330 and a ninth drive pulley. The ninth drive pulley is provided on the third drive shaft 330, and a sixth drive belt is sleeved on the second drive pulley and the ninth drive pulley.

[0039] In the embodiments of this application, a fourth transmission pulley 332 is provided on the third transmission shaft 330, a fifth transmission pulley 210 is provided on the glue injection screw 20, and a third transmission belt 333 is sleeved on the fourth transmission pulley 332 and the fifth transmission pulley 210.

[0040] Optionally, a fifth transmission gear is provided on the third transmission shaft 330, and a sixth transmission gear is provided on the injection screw 20, with the fifth transmission gear and the sixth transmission gear meshing with each other.

[0041] Preferably, the injection device further includes a tensioning assembly 40, which includes a tensioning shaft 41 and a tensioning wheel 42. The tensioning wheel 42 is rotatably mounted on the tensioning shaft 41 and presses against the third transmission belt 333. The tensioning assembly 40 is mounted on the power conversion mechanism 30. This ensures smooth transmission of the third transmission belt 333.

[0042] Specifically, at least a portion of the tensioning assembly 40 is adjustable to adjust the position of the tensioning wheel 42; and / or the tensioning wheel 42 is located on the outer or inner side of the third drive belt 333; and / or there are multiple tensioning assemblies 40, and the multiple tensioning assemblies 40 are arranged in an adjustable manner.

[0043] Specifically, at least one of the tensioning components 40 has a tensioning wheel 42 pressed onto the second transmission belt 324 so that the transmission of the second transmission belt 324 is smooth through the tensioning wheel 42.

[0044] Specifically, the second power mechanism 200 includes a second motor, a sixth transmission pulley 211 is provided on the injection screw 20, and a fourth transmission belt 212 is sleeved on the output shaft of the second motor and the sixth transmission pulley 211; and / or the power conversion mechanism 30 also includes a conversion box 34, which includes a first side wall 341 and a second side wall 342, one end of the input part 31 and one end of the second output part 33 both extend to the outside of the first side wall 341, and one end of the first output part 32 extends to the outside of the second side wall 342.

[0045] like Figure 7 As shown, a second bearing is sleeved on the third drive shaft 330. The second bearing is located between the third drive shaft 330 and the conversion box 34. There are multiple second bearings, which are spaced apart along the extension direction of the third drive shaft 330.

[0046] There are two second bearings. One of the two second bearings is located at the end of the third drive shaft 330 near the second side wall 342, and the other of the two second bearings is located on the shaft section of the third drive shaft 330 near the first side wall 341.

[0047] Specifically, a third bearing is sleeved on the first drive shaft 310. The third bearing is located between the first drive shaft 310 and the conversion box 34. There are multiple third bearings, which are spaced apart along the extension direction of the first drive shaft 310.

[0048] There are two third bearings. One of the three third bearings is located at the end of the first drive shaft 310 near the second side wall 342, and the other of the two third bearings is located on the shaft section of the first drive shaft 310 near the first side wall 341.

[0049] Specifically, a fourth bearing is fitted on the second drive shaft 320. The fourth bearing is located between the second drive shaft 320 and the conversion box 34. There are multiple fourth bearings, which are spaced apart along the extension direction of the second drive shaft 320.

[0050] There are two fourth bearings. One of the four fourth bearings is located at the end of the second drive shaft 320 near the second side wall 342, and the other of the four fourth bearings is located on the shaft section of the second drive shaft 320 near the first side wall 341.

[0051] Optionally, a seventh transmission pulley 201 is provided on the output shaft of the second motor, and a fourth transmission belt 212 is fitted on the seventh transmission pulley 201 and the sixth transmission pulley 211.

[0052] like Figure 5As shown, one of the sixth transmission pulley 211 and the fifth transmission pulley 210 is provided with a protrusion 2100, and the other of the sixth transmission pulley 211 and the fifth transmission pulley 210 is provided with a groove 2101. The protrusion is inserted into the groove and cooperates with each other to ensure that the sixth transmission pulley 211 and the fifth transmission pulley 210 rotate coaxially.

[0053] Specifically, the power conversion mechanism 30 also includes a first clutch 334 and a second clutch 325. The first clutch 334 is mounted on the third drive shaft 330, and the second clutch 325 is mounted on the second drive shaft 320. Both the first clutch 334 and the second clutch 325 are located inside the conversion box 34.

[0054] In the embodiments of this application, both the first clutch 334 and the second clutch 325 are electromagnetic clutches.

[0055] In the specific implementation of the embodiments of this application, such as Figure 7 As shown, the first power mechanism 100 achieves left or right power output through the power conversion mechanism 30. The left or right output is achieved by engaging with the first clutch 334 or the second clutch 325 in the conversion box 34. When the second clutch 325 is engaged and the first clutch 334 is disengaged, it is a right output. At this time, the second clutch 325 is engaged, driving the first transmission gear 321 to move along the extension direction of the second transmission shaft 320 so that the first transmission gear 321 meshes with the first drive gear 313. When the first clutch is engaged and the second clutch is disengaged, it is a left output. At this time, the first clutch is engaged, driving the second transmission gear 331 to move along the extension direction of the third transmission shaft 330 so that the second transmission gear 331 meshes with the second drive gear 314. The left output power merges with the second power mechanism 200 to control the rotation of the injection screw 20. The fifth transmission pulley and the sixth transmission pulley 211 are connected together and rotate. The right output power controls the rotation of the injection screw 10. The first power mechanism 100 plays an important role in both the melting and injection processes. Unlike the prior art where the first power mechanism 100 only functions in the melting process, this application achieves full utilization of the power of the first power mechanism 100 through the power conversion mechanism 30, as shown in Table 1 below:

[0056] Table 1 Application of Injection Equipment

[0057]

[0058] In Table 1, the main purpose of this application is to make full use of the power of the first power mechanism 100. If the power selected according to the melting requirements is A (first power mechanism 100) and the power selected according to the injection requirements is B (second power mechanism 200), there are three relationships between A and B: A > B, A < B, and A = B. Here, A and B both represent power.

[0059] Among them, the cases of A>B and A=B are the power conditions that satisfy both melting and injection; A<B is the case that only melting is satisfied. In this case, the power is still short (BA) to meet the injection requirements, and the power is supplemented by the second power mechanism 200.

[0060] In the embodiments of this application, both the first motor and the second motor are servo motors.

[0061] The specific detection method for the position of the injection screw in Table 1 is as follows: Whenever the injection screw 20 rotates, it will cause the injection screw 10 to move a corresponding distance. One rotation of the injection screw 20 will cause the injection screw 10 to move a distance P equal to one screw lead. The injection screw is connected to a servo motor, which has an encoder. One rotation of the servo motor corresponds to a specific number of pulses n from the encoder. If the servo motor and the injection screw 20 are connected by an i-transmission ratio, then for each additional rotation, the injection screw 10 moves a distance of P / (i*n). A position on the injection screw 10 is chosen as the origin. The number of pulses corresponding to the origin is recorded. The product of the difference between the number of pulses at other positions and the number of pulses at the origin, and "P / (i*n)", is the distance of the injection screw relative to the origin. The formula is: (n-n0)*[P / (i*n)]=L; where L is the distance of the dispensing screw relative to the origin; n is the number of pulses at positions other than the origin; and n0 is the number of pulses at the origin.

[0062] Specifically, the injection device also includes a first base plate 50, a second base plate 51, a third base plate 52, and a connecting assembly 54. The first base plate 50, the second base plate 51, and the third base plate 52 are spaced apart. The connecting assembly 54 includes a connecting post 541 and a locking nut 540. After the connecting post 541 passes through the first base plate 50, the second base plate 51, and the third base plate 52, the locking nut 540 is sleeved on the connecting post 541 and threadedly connected to the connecting post 541 to lock the first base plate 50, the second base plate 51, and the third base plate 52 in a predetermined position.

[0063] There are two locking nuts 540, which are respectively located at both ends of the connecting post 541.

[0064] Specifically, the first base plate 50, the second base plate 51, and the third base plate 52 are all rectangular plates, and there are multiple connecting components 54. The connecting posts 541 of each connecting component 54 are inserted at the corners of the first base plate 50, the second base plate 51, and the third base plate 52 to ensure stable connection of the base plates. Connecting blocks 501 are provided at the corners of the first base plate 50 and the second base plate 51 to connect the first base plate 50 and the second base plate 51. The connecting blocks 501 located at the top of the first base plate 50 and the second base plate 51 extend toward the side away from the first base plate 50 and the second base plate 51. The conversion box 34 is installed on the top of the first base plate 50 and the second base plate 51, and the conversion box 34 is located between two connecting blocks 501 to limit the conversion box 34 to ensure stable installation.

[0065] Specifically, the injection equipment also includes a first mounting plate 60 and a second mounting plate 61. The injection screw 20 is mounted on the first mounting plate 60. The first mounting plate 60 is spaced apart from the first base plate 50 and located on the side of the first base plate 50 away from the injection screw 10. The first motor is mounted on the conversion box 34 through a mounting bracket so that there is a gap between the first motor and the conversion box 34 along the distribution direction of the injection screw 10 and the injection screw 20. The second motor is mounted on the second mounting plate 61. The second mounting plate 61 includes a first plate segment connected to the connecting block 501 and a second plate segment disposed opposite to the first mounting plate 60. The first plate segment and the second plate segment are connected to each other. There are two first plate segments, which are disposed opposite to each other. The second motor is located between the two first plate segments to make the second motor installation stable. The output shaft of the second motor passes through the second plate segment to further stabilize the installation of the second motor.

[0066] Specifically, the injection equipment also includes: a bearing assembly 71, a bearing housing 73, a fastener 74, a transmission end cover 70, and a fourth transmission shaft 72. The fourth transmission shaft 72 is connected to the injection screw 20. The transmission end cover 70 and the fourth transmission shaft 72 are connected by a connecting block, which is fixedly connected to the transmission end cover 70. One end of the fastener is fixedly connected to the connecting block, and the other end of the fastener is threadedly connected to the fourth transmission shaft 72. The injection screw 10 is connected to the transmission end cover 70 so that the rotation of the injection screw 20 can drive the injection screw 20 to rotate. The fourth drive shaft 72 rotates, thereby driving the fastener 74, connecting block and drive end cover 70 to move along the extension direction of the injection screw 20, thereby driving the injection screw 10 to move; the bearing assembly 71 is disposed between the fourth drive shaft 72 and the bearing seat 73, the bearing seat 73 is connected to the drive end cover 70, the bearing assembly 71 includes multiple first bearings, all of which are sleeved on the injection screw 20, and the multiple first bearings are arranged sequentially along the extension direction of the injection screw 20 so that the injection screw 20 rotates smoothly.

[0067] The transmission end cover 70 is located on the side of the bearing housing 73 away from the injection screw 20; the fourth transmission shaft 72 is fixedly connected to the injection screw 20 by screws.

[0068] In summary, this application utilizes the power conversion mechanism 30 to make full use of servo power, based on the characteristic that the melting process and the injection process are separate actions. It uses a servo power system (first power mechanism 100) to realize the two processes including the melting process and the injection process, thereby solving the problem of insufficient utilization of the servo power system and reducing production costs.

[0069] As can be seen from the above description, the embodiments of the present invention achieve the following technical effects:

[0070] The injection device of the present invention is equipped with a power conversion mechanism 30. A first power mechanism 100 is connected to the power conversion mechanism 30. The power conversion mechanism 30 can be selectively connected to the injection screw 10 or the injection lead screw 20, so that the first power mechanism 100 drives the injection screw 10 to rotate or drives the injection lead screw 20 to rotate under the action of the power conversion mechanism 30. In this way, the two processes of driving the injection screw 10 and driving the injection lead screw 20 can be realized by the first power mechanism 100 alone, which can make full use of the power of the first power mechanism 100 and thus reduce production costs.

[0071] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An injection device, comprising a dispensing screw (10), a glue injection lead screw (20), a first power mechanism (100), and a second power mechanism (200), wherein the first power mechanism (100) is driven to connect with the dispensing screw (10) to drive the dispensing screw (10) to rotate about its axis; and the second power mechanism (200) is driven to connect with the glue injection lead screw (20) to drive the glue injection lead screw (20) to rotate about its axis, characterized in that, The injection device also includes: A power conversion mechanism (30) is provided, wherein the first power mechanism (100) is connected to the power conversion mechanism (30), and the power conversion mechanism (30) may be selectively connected to the glue injection screw (10) or the glue injection lead screw (20) so that the first power mechanism (100) drives the glue injection screw (10) to rotate or drives the glue injection lead screw (20) to rotate under the action of the power conversion mechanism (30); The power conversion mechanism (30) includes an input section (31), a first output section (32), and a second output section (33). The input section (31) can be selectively connected to the first output section (32) or the second output section (33). The first power mechanism (100) is connected to the input section (31). The first output section (32) is connected to the glue injection screw (10). The second output section (33) is connected to the glue injection lead screw (20). The input section (31) includes a first drive shaft (310) and a first drive pulley (311). The first drive pulley (311) is mounted on the first drive shaft (310). The first power mechanism (100) is a first motor. The output shaft of the first motor and the first drive pulley (311) are fitted with a first drive belt (312). The first drive shaft (310) is provided with a first drive gear (313), and the first output part (32) includes a second drive shaft (320) and a first drive gear (321). The first drive gear (321) is provided on the second drive shaft (320). The first drive gear (313) is used to mesh with the first drive gear (321). The second drive shaft (320) is connected to the glue injection screw (10) in a transmission connection. The second drive shaft (320) is provided with a second drive pulley (322), the glue injection screw (10) is provided with a third drive pulley (323), and a second drive belt (324) is sleeved on the second drive pulley (322) and the third drive pulley (323). The first drive shaft (310) is provided with a second drive gear (314), and the second output part (33) includes a third drive shaft (330) and a second drive gear (331), wherein the second drive gear (331) is provided on the third drive shaft (330); wherein the first drive gear (313) meshes with the first drive gear (321), or the second drive gear (314) meshes with the second drive gear (331); The third drive shaft (330) is provided with a fourth drive pulley (332), the glue injection screw (20) is provided with a fifth drive pulley (210), and a third drive belt (333) is sleeved on the fourth drive pulley (332) and the fifth drive pulley (210); the second power mechanism (200) includes a second motor, the glue injection screw (20) is provided with a sixth drive pulley (211), and a fourth drive belt (212) is sleeved on the output shaft of the second motor and the sixth drive pulley (211).

2. The injection device according to claim 1, characterized in that, The injection device also includes: Tensioning assembly (40), the tensioning assembly (40) includes a tensioning shaft (41) and a tensioning wheel (42), the tensioning wheel (42) is rotatably mounted on the tensioning shaft (41), and the tensioning wheel (42) is pressed onto the third transmission belt (333); The tensioning component (40) is mounted on the power conversion mechanism (30).

3. The injection device according to claim 2, characterized in that, At least a portion of the tensioning assembly (40) is adjustablely positioned to adjust the position of the tensioning wheel (42); and / or The tensioning pulley (42) is located on the outer or inner side of the third transmission belt (333); and / or There are multiple tensioning components (40), and the positions of the multiple tensioning components (40) are arranged in an adjustable manner.

4. The injection device according to claim 2 or 3, characterized in that, The power conversion mechanism (30) further includes a conversion box (34), which includes a first side wall (341) and a second side wall (342). One end of the input part (31) and one end of the second output part (33) extend to the outside of the first side wall (341), and one end of the first output part (32) extends to the outside of the second side wall (342).

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