A material feeding mechanism

Abstract

The utility model discloses a material feeding mechanism, comprising: a main housing, two transmission shafts, two rotating wheels and an auxiliary housing, a transmission gear train and a motor are arranged in the main housing, the motor and the input end of the transmission gear train are connected by gear transmission, the two transmission shafts are both rotatably connected to the main housing, the two transmission shafts are respectively connected to the corresponding gears on the gear train, the two rotating wheels are both located outside the main housing, and the two rotating wheels are respectively connected to the corresponding transmission shafts, a clamping space is formed between the two rotating wheels, the auxiliary housing is connected to the main housing, two rotation matching holes are arranged on the auxiliary housing, and the other ends of the two transmission shafts are respectively rotatably connected to the corresponding rotation matching holes. The end of the transmission shaft of the material feeding mechanism of the present application extends into the rotation matching hole of the auxiliary housing, the auxiliary housing limits the suspended ends of the two transmission shafts, so that the two transmission shafts are not easily deformed, the spacing between the rotating wheels on the two transmission shafts is constant, and an effective driving force can be applied to the rubber strip in the middle, thereby improving the reliability and durability of the material feeding mechanism.

Description

Technical Field

[0001] The utility model relates to the technical field of printing, in particular to a material feeding mechanism. Background Art

[0002] With the development of science and technology, 3D printing technology is increasingly widely used in various fields. At the same time, 3D printing technology has also appeared in people's lives in the form of more types of products. The material feeding mechanism is one of them. The material feeding mechanism usually includes a main housing, two transmission shafts, and two rotating wheels. A transmission gear train and a motor are arranged in the main housing. The motor and the input end of the transmission gear train are connected by gear transmission. The two transmission shafts can be rotatably connected to the main housing. The two transmission shafts have a cantilever section extending out of the main housing. The two transmission shafts are respectively connected to the corresponding gears on the gear train. The two rotating wheels are located outside the main housing, and the two rotating wheels are respectively connected to the cantilever sections of the corresponding transmission shafts. A clamping space is formed between the two rotating wheels, and the colloid is clamped between the two rotating wheels. The rotation of the rotating wheel can drive the rubber strip to move and feed. In the prior art, the rotating wheel is directly installed on the cantilever section of the transmission shaft extending out of the main housing. During long-term use, the cantilever section is prone to skew and deformation, which increases the distance between the two rotating wheels, affects the clamping force and driving force applied to the rubber strip, and the product is not stable and durable.

[0003] In view of this, the present utility model is proposed. Utility Model Content

[0004] In order to solve one of the above problems, the utility model provides a material feeding mechanism with good reliability and durability.

[0005] This application provides the following technical solutions:

[0006] The embodiment of the present application provides a material feeding mechanism, comprising:

[0007] A main housing, wherein a transmission gear train and a motor are disposed in the main housing, and the motor is connected to the input end of the transmission gear train through a gear transmission;

[0008] Two transmission shafts, both of which are rotatably connected to the main housing, are respectively connected to corresponding gears on the gear train, and both extend out of the main housing;

[0009] Two rotating wheels, both of which are located outside the main housing, and are respectively connected to corresponding transmission shafts, with a clamping space formed between the two rotating wheels;

[0010] The auxiliary shell is connected to the main shell, and two rotational matching holes are arranged on the auxiliary shell. The ends of the two transmission shafts are rotatably connected to the corresponding rotational matching holes respectively.

[0011] Optionally, the auxiliary shell has an auxiliary shell body and at least one wear-resistant ring, the auxiliary shell body is connected to the main shell body, the wear-resistant ring is connected to the auxiliary shell body, and the wear-resistant ring has the rotation fitting hole;

[0012] At least one of the transmission shafts extends into the rotationally fitting hole of the wear-resistant ring.

[0013] Optionally, the two transmission shafts are respectively a driving shaft and a free shaft, the driving shaft is fixedly connected to a corresponding gear, and the free shaft is rotatably connected to the corresponding gear;

[0014] The driving shaft is connected to the rotation matching hole of the wear-resistant ring, and the free shaft is connected to the rotation matching hole opened on the auxiliary shell body.

[0015] Optionally, the auxiliary shell body is provided with an embedding groove;

[0016] The wear-resistant ring is embedded in the embedding groove.

[0017] Optionally, the wear-resistant ring is a metal ring.

[0018] Optionally, a lower through slot is provided on the main housing, and both of the two rotating wheels are partially located in the lower through slot;

[0019] The auxiliary shell is provided with an upper through slot;

[0020] When the auxiliary shell is connected to the main shell, the upper portion passing groove and the upper portion passing groove enclose a rubber strip channel.

[0021] Optionally, the auxiliary shell is detachably connected to the main shell.

[0022] Optionally, an insertion shaft is provided on the auxiliary shell;

[0023] A slot is arranged on the main housing;

[0024] When the auxiliary shell is connected to the main shell, the insertion shaft is inserted into the slot.

[0025] Optionally, a connecting hole is provided on the auxiliary shell, and a threaded hole is provided on the main shell;

[0026] One end of the screw passes through the connecting hole and is threadedly connected to the threaded hole, and the cap body of the screw is limited on the auxiliary shell.

[0027] Optionally, the input end gear of the gear train includes a toothed disc and a first tooth column, the toothed disc includes a circular disc and an annular rib arranged around the edge of the circular disc, the annular rib is perpendicular to the circular disc, a plurality of convex teeth are arranged on the annular rib, the first tooth column is vertically connected to the circular disc, and the outer diameter of the circular disc is greater than the outer diameter of the first tooth column;

[0028] The rotating shaft of the motor is connected with a second gear column, and the second gear column is perpendicular to the first gear column;

[0029] The second gear column is meshed with the gear plate, and the first gear column is meshed with another gear in the transmission gear train.

[0030] By adopting the above technical solution, the utility model has the following beneficial effects:

[0031] The end of the transmission shaft of the material feeding mechanism of the present application extends into the rotating matching hole of the auxiliary shell. The auxiliary shell limits the suspended ends of the two transmission shafts, making the two transmission shafts not easily deformed. The distance between the wheels on the two transmission shafts is constant, which can apply effective driving force to the middle rubber strip, thereby improving the reliability and durability of the material feeding mechanism.

[0032] The specific implementation of the utility model is further described in detail below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The accompanying drawings are part of this application and are used to provide a further understanding of the utility model. The schematic embodiments of the utility model and their descriptions are used to explain the utility model, but do not constitute an improper limitation on the utility model. Obviously, the drawings described below are only some embodiments. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0034] Figure 1 It is a partial structural schematic diagram of a material feeding mechanism provided in an embodiment of the present application;

[0035] Figure 2 yes Figure 1 Schematic diagram of the structure after the auxiliary shell is deleted;

[0036] Figure 3 It is a structural schematic diagram of the auxiliary shell of the material feeding mechanism provided in the embodiment of the present application;

[0037] Figure 4 It is a schematic diagram of the internal structure of the material feeding mechanism provided in the embodiment of the present application.

[0038] In the figure, 1, main housing; 11, lower through groove; 2, transmission gear train; 21, input end gear; 211, toothed disc; 2111, disc; 2112, annular rib; 2113, convex tooth; 212, first gear column; 3, motor; 31, second gear column; 4, driving shaft; 5, free shaft; 6, auxiliary housing; 61, wear-resistant ring; a, rotating matching hole; 62, auxiliary housing body; 621, upper through groove; 622, plug shaft; 7, rotating wheel.

[0039] It should be noted that these drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but rather to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solutions and advantages of the embodiments of the utility model clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. The following embodiments are used to illustrate the utility model but are not used to limit the scope of the utility model.

[0041] In the description of the present invention, it should be noted that the terms "upper", "lower", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0042] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense, for example, it 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. 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] See also Figures 1 to 4As shown, the embodiment of the present application provides a material feeding mechanism, including: a main housing 1, two transmission shafts, two rotating wheels 7 and an auxiliary housing 6. A transmission gear train 2 and a motor 3 are arranged in the main housing 1, and the motor 3 is transmission-connected to the input end gear 21 of the transmission gear train 2, and the two transmission shafts are rotatably connected to the main housing 1, and the two transmission shafts (numbered 4 and 5 in the figure) are respectively connected to the corresponding gears on the gear train, and the two transmission shafts extend out of the main housing 1, and the two rotating wheels 7 are located on the outside of the main housing 1, and the two rotating wheels 7 are respectively connected to the corresponding transmission shafts, and a clamping space is formed between the two rotating wheels 7, and the auxiliary housing 6 is connected to the main housing 1, and two rotation matching holes a are arranged on the auxiliary housing 6, and the ends of the two transmission shafts are rotatably connected to the corresponding rotation matching holes a respectively.

[0044] The end of the transmission shaft of the material feeding mechanism provided in the embodiment of the present application extends into the rotating matching hole a of the auxiliary shell 6. The auxiliary shell 6 limits the suspended ends of the two transmission shafts, making the two transmission shafts not easily deformed. The spacing between the wheels 7 on the two transmission shafts is constant, and effective driving force can be applied to the middle rubber strip, thereby improving the reliability and durability of the material feeding mechanism.

[0045] In some possible embodiments, the auxiliary shell 6 has an auxiliary shell body 62 and at least one wear-resistant ring 61, the auxiliary shell body 62 is connected to the main shell 1, the wear-resistant ring 61 is connected to the auxiliary shell body 62, the wear-resistant ring 61 has the rotational fitting hole a, and at least one of the transmission shafts extends into the rotational fitting hole a of the wear-resistant ring 61.

[0046] The auxiliary shell body 62 can be a plastic structure, the wear-resistant ring 61 is made of wear-resistant material, and the transmission shaft is rotatably connected to the rotating matching hole a on the inner side of the wear-resistant ring 61. The transmission shaft rotates at high speed and will not directly rub against the auxiliary shell body 62, and will not cause friction damage to the auxiliary shell body 62, thereby extending the service life of the product and allowing the product to maintain good working conditions for a long time.

[0047] In some possible implementation schemes, the two transmission shafts are respectively a driving shaft 4 and a free shaft 5, the driving shaft 4 is fixedly connected to the corresponding gear, the free shaft 5 and the corresponding gear are rotatably connected, the driving shaft 4 is connected to the rotating matching hole a of the wear-resistant ring 61, and the free shaft 5 is connected to the rotating matching hole a opened on the auxiliary shell body 62.

[0048] In this embodiment, the driving shaft 4 and the corresponding gear rotate synchronously, that is, the gear drives the driving shaft 4 to rotate, so the driving shaft 4 has a high rotation speed, and the driving shaft 4 is connected to the rotation matching hole a of the wear-resistant ring 61, which can effectively avoid the wear of the auxiliary shell body 62. The free shaft 5 and the corresponding gear are rotatably connected, and the rotation speed of the free shaft 5 is relatively low, so the free shaft 5 can be connected to the rotation matching hole a opened on the auxiliary shell body 62.

[0049] The circumferential annular surface of the rotating wheel 7 connected to the driving shaft 4 is provided with convex teeth, and the rotating wheel 7 connected to the free shaft 5 can be rotatably matched with the free shaft 5, and the rotating wheel 7 on the free shaft 5 is a passive part. When the rubber strip is clamped between the two rotating wheels 7, the rotating wheel 7 with convex teeth rotates to drive the rubber strip to move, while the rotating wheel 7 on the free shaft 5 rotates passively, and the rotating wheel 7 on the free shaft 5 plays a role in keeping the rubber strip straight during the feeding process to prevent the rubber strip consumables from shifting.

[0050] In some possible implementation schemes, an embedding groove is provided on the auxiliary shell body, and the wear-resistant ring 61 is embedded in the embedding groove.

[0051] The wear-resistant ring 61 may be a nylon ring or a metal ring.

[0052] Optionally, the main housing 1 is provided with a lower through slot 11, and the two wheels 7 are partially located in the lower through slot 11, and the auxiliary housing 6 is provided with an upper through slot 621, and when the auxiliary housing 6 is connected to the main housing 1, the upper through slot 621 and the upper through slot 621 enclose a rubber strip channel. The rubber strip runs through the rubber strip channel.

[0053] In some possible implementations, the auxiliary shell 6 is detachably connected to the main shell 1. The auxiliary shell 6 is provided with an insertion shaft 622. The main shell 1 is provided with a slot, and when the auxiliary shell 6 is connected to the main shell 1, the insertion shaft 622 is inserted into the slot. The insertion shaft 622 and the slot play a role of positioning and matching.

[0054] In some possible implementation schemes, a connecting hole is provided on the auxiliary shell 6 , and a threaded hole is provided on the main shell 1 . One end of a screw passes through the connecting hole and is threadedly connected to the threaded hole, and the cap of the screw is limited on the auxiliary shell 6 .

[0055] In some possible implementations, see Figure 4As shown, the input end gear 21 of the gear train includes a toothed disc 211 and a first tooth column 212, the toothed disc 211 includes a disk 2111 and an annular rib 2112 arranged around the edge of the disk 2111, the annular rib 2112 is perpendicular to the disk 2111, a plurality of convex teeth 2113 are arranged on the annular rib 2112, the first tooth column 212 is vertically connected to the disk 2111, the outer diameter of the disk 2111 is greater than the outer diameter of the first tooth column 212, the rotating shaft of the motor 3 is connected with a second tooth column 31, the second tooth column 31 is perpendicular to the first tooth column 212, the second tooth column 31 is meshed with the toothed disc 211, and the first tooth column 212 is meshed with another gear in the transmission gear train 2. The structure of the input end gear 21 of the present application has a larger reduction ratio, can also achieve a larger output torque, can reduce the number of gears in the transmission gear train 2, can reduce the noise generated during the transmission process, and has better durability than ordinary gear reduction.

[0056] The above is only a preferred embodiment of the utility model, and does not limit the utility model in any form. Although the utility model has been disclosed as a preferred embodiment as above, it is not used to limit the utility model. Any technician familiar with this patent can make some changes or modify the technical content suggested above into an equivalent embodiment with equivalent changes without departing from the scope of the technical solution of the utility model. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the utility model without departing from the content of the technical solution of the utility model still falls within the scope of the solution of the utility model.

Claims

1. A material feeding mechanism, characterized in that: include: A main housing, wherein a transmission gear train and a motor are disposed in the main housing, and the motor is connected to the input end of the transmission gear train through a gear transmission; Two transmission shafts, both of which are rotatably connected to the main housing, are respectively connected to corresponding gears on the gear train, and both extend out of the main housing; Two rotating wheels, both of which are located outside the main housing, and are respectively connected to corresponding transmission shafts, with a clamping space formed between the two rotating wheels; The auxiliary shell is connected to the main shell, and two rotational matching holes are arranged on the auxiliary shell. The ends of the two transmission shafts are rotatably connected to the corresponding rotational matching holes respectively.

2. The material feeding mechanism according to claim 1, characterized in that: The auxiliary shell has an auxiliary shell body and at least one wear-resistant ring, the auxiliary shell body is connected to the main shell, the wear-resistant ring is connected to the auxiliary shell body, and the wear-resistant ring has the rotation matching hole; At least one of the transmission shafts extends into the rotationally fitting hole of the wear-resistant ring.

3. The material feeding mechanism according to claim 2, characterized in that: The two transmission shafts are respectively a driving shaft and a free shaft, the driving shaft is fixedly connected to a corresponding gear, and the free shaft is rotatably connected to the corresponding gear; The driving shaft is connected to the rotation matching hole of the wear-resistant ring, and the free shaft is connected to the rotation matching hole opened on the auxiliary shell body.

4. The material feeding mechanism according to claim 2, characterized in that: The auxiliary shell body is provided with an embedding groove; The wear-resistant ring is embedded in the embedding groove.

5. The material feeding mechanism according to claim 2, characterized in that: The wear-resistant ring is a metal ring.

6. The material feeding mechanism according to claim 1, characterized in that: The main housing is provided with a lower through slot, and both of the two rotating wheels are partially located in the lower through slot; The auxiliary shell is provided with an upper through slot; When the auxiliary shell is connected to the main shell, the upper portion passing groove and the upper portion passing groove enclose a rubber strip channel.

7. The material feeding mechanism according to claim 1, characterized in that: The auxiliary shell is detachably connected to the main shell.

8. The material feeding mechanism according to claim 7, characterized in that: The auxiliary shell is provided with an insert shaft; A slot is provided on the main housing; When the auxiliary shell is connected to the main shell, the insertion shaft is inserted into the slot.

9. The material feeding mechanism according to claim 7, characterized in that: The auxiliary shell is provided with a connection hole, and the main shell is provided with a threaded hole; One end of the screw passes through the connecting hole and is threadedly connected to the threaded hole, and the cap body of the screw is limited on the auxiliary shell.

10. The material feeding mechanism according to claim 1, characterized in that: The input end gear of the gear train includes a toothed disc and a first tooth column, the toothed disc includes a circular disc and an annular rib arranged around the edge of the circular disc, the annular rib is perpendicular to the circular disc, a plurality of convex teeth are arranged on the annular rib, the first tooth column is vertically connected to the circular disc, and the outer diameter of the circular disc is larger than the outer diameter of the first tooth column; The rotating shaft of the motor is connected with a second gear column, and the second gear column is perpendicular to the first gear column; The second gear column is meshed with the gear plate, and the first gear column is meshed with another gear in the transmission gear train.

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