Printer plastic gear with built-in lubricating structure

Abstract

The utility model provides a printer plastic gear with a built-in lubricating structure, belongs to the technical field of printers, and aims to solve the problem that the conventional plastic gear is relatively complicated to maintain due to regular smearing of lubricating grease or addition of lubricating oil. Comprising a gear body, multiple sets of gear teeth, a driving rod, lubricating sponge, an oil storage tank, a one-way limiting assembly and a lubricating assembly, and the multiple sets of gear teeth are arranged on the outer side of the gear body in a circumferential array mode; the driving rod is slidably connected to the interior of the gear body, and the driving rod is located in the middle of the two sets of gear teeth; at least two sets of lubricating sponges are arranged, the two sets of lubricating sponges are fixedly installed on the outer side of the gear body, and the lubricating sponges are located between the two sets of gear teeth. The oil storage tank is arranged in the gear main body; the one-way limiting assembly is arranged in the gear body. The lubricating assembly is arranged in the gear body. The utility model has the advantages of one-way transmission, built-in lubrication, convenience in maintenance and the like.

Description

Technical Field

[0001] This utility model belongs to the field of printer technology, and more specifically, it relates to a printer plastic gear with a built-in lubrication structure. Background Technology

[0002] With the continuous development of printer technology, users have placed higher demands on printer performance, reliability, and lifespan. The internal transmission system of a printer is crucial for its normal operation, and gears are key components within this system. Due to their inherent characteristics, plastic gears have been widely used in the printer industry. Compared to traditional metal gears, plastic gears offer advantages such as lighter weight, lower cost, easier processing and molding, and lower noise. Existing plastic gears typically consist of three parts: the gear body, the teeth, and the shaft hole. The gear body, as the load-bearing structure, is manufactured as a single piece using high-strength engineering plastic through injection molding, providing stable mechanical support for the entire gear. The teeth are evenly distributed on the outer circumference of the gear body, achieving efficient meshing with other gears or transmission components through precise tooth profile design, ensuring smooth power transmission. The shaft hole is located at the center of the gear body and is used to mate with the drive shaft, achieving a reliable connection between the gear and the drive unit through interference fits or key connections.

[0003] This utility model, with application number CN202322581986.3, provides a plastic gear belonging to the field of mechanical technology. It solves the problem of the heavy weight of existing plastic gears. The plastic gear includes a gear body, which comprises an inner ring, an outer ring, and a ring of teeth formed on the outer wall of the outer ring. The inner and outer rings are connected by a ring of spokes. There are two gear bodies arranged axially side-by-side, with the teeth on both gear bodies aligned one-to-one. The two gear bodies are pressed together and fixed together by multiple screws. On the two aligned teeth, concave cavities matching the shape of the teeth are formed on adjacent side surfaces. One side of the concave cavity extends near the tooth tip, and the other side extends near the inner surface of the outer ring. This plastic gear is lightweight.

[0004] Based on the above, the common lubrication methods for existing plastic gears mainly include external application of grease and periodic addition of lubricating oil. However, periodic application of grease or addition of lubricating oil requires manual operation, which is cumbersome and makes it difficult to ensure even application and timely replenishment of lubricating oil, which can easily lead to insufficient lubrication. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides a printer plastic gear with a built-in lubrication structure. This addresses the common lubrication methods for existing plastic gears, such as external application of grease and periodic addition of lubricating oil. However, periodic application of grease or addition of lubricating oil requires manual operation, which is cumbersome and makes it difficult to ensure even application and timely replenishment of lubricating oil, easily leading to insufficient lubrication.

[0006] The purpose and effect of this utility model of a printer plastic gear with a built-in lubrication structure are achieved by the following specific technical means:

[0007] A printer plastic gear with a built-in lubrication structure includes a gear body, gear teeth, a drive rod, a lubricating sponge, an oil reservoir, an inspection window, a one-way limiting component, and a lubrication component. Multiple sets of gear teeth are arranged in a circumferential array on the outer side of the gear body. The drive rod is slidably connected inside the gear body and is located between two sets of gear teeth. At least two sets of lubricating sponges are fixedly installed on the outer side of the gear body and are located between two sets of gear teeth. The oil reservoir is located inside the gear body. The inspection window is bolted to the front of the gear body. The one-way limiting component is located inside the gear body. The lubrication component is located inside the gear body.

[0008] Furthermore, the one-way limiting component includes a threaded screw and a ratchet, wherein the threaded screw is rotatably connected inside the oil storage tank; and the ratchet is fixedly installed at one end of the threaded screw.

[0009] Furthermore, the one-way limiting component also includes: an output shaft and a pawl, wherein the output shaft is rotatably connected to one end of a threaded screw; the pawl is installed at one end of the output shaft, and the pawl has a one-way meshing structure with a ratchet.

[0010] Furthermore, the lubrication assembly includes: a mounting groove, which is formed inside the gear body, and an oil reservoir is engaged inside the mounting groove.

[0011] Furthermore, the lubrication assembly also includes a drive rack and a return spring. The drive rack is slidably connected inside the mounting groove and is fixedly mounted at the end of the drive rod. One end of the return spring is fixedly mounted at the bottom end of the drive rack, and the other end of the return spring is fixedly mounted inside the mounting groove.

[0012] Furthermore, the lubrication assembly also includes: a driven gear and a transmission piston, the driven gear being fixedly mounted on one end of the output shaft, the driven gear meshing with the drive rack; the transmission piston being slidably connected inside the oil reservoir, and the transmission piston being threadedly connected to the outside of the threaded screw.

[0013] Furthermore, the lubrication assembly also includes: a pipe interface, an oil inlet, and an oil delivery pipe. The pipe interface is fixedly installed on one side of the oil storage tank; the oil inlet is located on the front side of the oil storage tank; one end of the oil delivery pipe is snapped into the inside of the pipe interface, and the oil delivery pipe is fixedly connected to the inside of two sets of lubricating sponges.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] Firstly, this invention features a one-way limiting component, which achieves one-way rotation control of the screw through the one-way meshing structure of the pawl and ratchet. Compared to traditional gear lubrication methods, this structure effectively avoids backflow during lubrication oil delivery, ensuring that lubricating oil is stably and continuously delivered to the lubrication points, preventing insufficient lubrication caused by backflow, and greatly improving the reliability and stability of the lubrication system.

[0016] Secondly, this invention features a lubrication component. When the gear body rotates, the interaction between the drive rod and other gears triggers the linkage of components such as the drive rack and driven gear, delivering lubricating oil from the oil tank to the lubrication sponge as needed. This automatic lubrication mechanism completely changes the cumbersome traditional method of manually applying grease or adding lubricating oil. It not only reduces maintenance workload but also precisely controls the replenishment of lubricating oil according to the actual operating conditions of the gears, ensuring that the gear teeth are always in a good lubricated state, effectively reducing wear and extending gear life.

[0017] This invention has the advantages of unidirectional transmission, built-in lubrication, and convenient maintenance. It achieves automated control of lubrication through the transmission process of the gears themselves, and can continuously and stably provide lubrication to the gears without external intervention. It solves the problem of cumbersome maintenance of existing plastic gears, and significantly improves the overall performance and reliability of the printer transmission system. At the same time, its modular design also facilitates later inspection and maintenance. Lubricating oil can be easily added through the oil filling port by simply opening the inspection window periodically and taking out the oil tank. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the main structure of this utility model.

[0019] Figure 2 This is a schematic diagram of the gear body structure of this utility model.

[0020] Figure 3 This is a schematic diagram of the mounting groove structure of this utility model.

[0021] Figure 4 This is a schematic diagram of the oil storage tank structure of this utility model.

[0022] Figure 5 This is a schematic diagram of the transmission piston structure of this utility model.

[0023] Figure 6 This is a schematic diagram of the ratchet structure of this utility model.

[0024] Figure 7 This is a schematic diagram of the ratchet structure of this utility model.

[0025] In the diagram, the correspondence between component names and drawing numbers is as follows:

[0026] 1. Gear body; 101. Mounting slot; 2. Gear teeth; 3. Drive rod; 301. Drive rack; 302. Return spring; 4. Lubricating sponge; 401. Oil supply pipe; 5. Oil reservoir; 501. Output shaft; 5011. Driven gear; 5012. Pawl; 502. Lead screw; 5021. Ratchet; 503. Transmission piston; 504. Pipe interface; 505. Oil inlet; 6. Inspection window. Detailed Implementation

[0027] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model. Example 1

[0028] As attached Figure 1 To be continued Figure 7 As shown:

[0029] This utility model provides a printer plastic gear with a built-in lubrication structure, including a gear body 1, gear teeth 2, drive rod 3, lubricating sponge 4, oil reservoir 5, inspection window 6, and one-way limiting component. Multiple sets of gear teeth 2 are arranged in a circumferential array on the outside of the gear body 1. The drive rod 3 is slidably connected inside the gear body 1, and is located between two sets of gear teeth 2. At least two sets of lubricating sponges 4 are provided, and are fixedly installed on the outside of the gear body 1, located between two sets of gear teeth 2. The oil reservoir 5 is located inside the gear body 1. The inspection window 6 is bolted to the front of the gear body 1. The one-way limiting component is located inside the gear body 1.

[0030] The one-way limiting component includes a threaded screw 502 and a ratchet 5021. The threaded screw 502 is rotatably connected inside the oil storage tank 5; the ratchet 5021 is fixedly installed at one end of the threaded screw 502.

[0031] The one-way limiting component also includes an output shaft 501 and a pawl 5012. The output shaft 501 is rotatably connected to one end of the threaded screw 502. The pawl 5012 is installed at one end of the output shaft 501, and the pawl 5012 has a one-way meshing structure with the ratchet 5021.

[0032] The specific usage and function of this embodiment are as follows:

[0033] When the power source drives the output shaft 501 to rotate in the forward direction, the pawl 5012 installed at one end of the output shaft 501 will engage with the ratchet 5021. Under the push of the pawl 5012, the threaded screw 502 will rotate in one direction inside the oil tank 5.

[0034] When the output shaft 501 rotates in the opposite direction, the special meshing structure between the pawl 5012 and the ratchet 5021 comes into play. At this time, the pawl 5012 slips on the tooth surface of the ratchet 5021, preventing the threaded screw 502 from generating a driving response due to the reverse rotation of the output shaft 501. This achieves a unidirectional transmission mechanism. Example 2

[0035] Based on Example 1, such as Figures 1 to 7 As shown, it also includes a lubrication assembly, which is disposed inside the gear body 1.

[0036] The lubrication component includes: a mounting groove 101, which is opened inside the gear body 1, and an oil reservoir 5 is snapped into the mounting groove 101.

[0037] The lubrication assembly also includes a drive rack 301 and a return spring 302. The drive rack 301 is slidably connected inside the mounting groove 101 and is fixedly installed at the end of the drive rod 3. One end of the return spring 302 is fixedly installed at the bottom end of the drive rack 301, and the other end of the return spring 302 is fixedly installed inside the mounting groove 101.

[0038] The lubrication assembly also includes a driven gear 5011 and a transmission piston 503. The driven gear 5011 is fixedly installed at one end of the output shaft 501, and the driven gear 5011 and the drive rack 301 mesh with each other. The transmission piston 503 is slidably connected inside the oil reservoir 5 and is threadedly connected to the outside of the threaded screw 502.

[0039] The lubrication assembly also includes: a pipe interface 504, an oil inlet 505, and an oil delivery pipe 401. The pipe interface 504 is fixedly installed on one side of the oil storage tank 5; the oil inlet 505 is located on the front side of the oil storage tank 5; one end of the oil delivery pipe 401 is snapped into the inside of the pipe interface 504, and the oil delivery pipe 401 is fixedly connected to the inside of two sets of lubricating sponges 4 respectively.

[0040] The specific usage and function of this embodiment are as follows:

[0041] When the plastic gear is assembled into the printer's transmission system and put into operation, the meshing rotation of the gear set will trigger the working mechanism of the built-in lubrication component. As multiple sets of gear bodies 1 mesh and transmit power, during the rotation of the gear body 1, the drive rod 3 located between two sets of gear teeth 2 will be subjected to pressure from another set of gear bodies 1 meshing with it at a specific position. At this time, the drive rod 3 slides along the inside of the gear body 1, and the drive rack 301 fixedly connected to its end slides synchronously in the mounting groove 101, compressing the return spring 302 to store energy.

[0042] The linear motion of the drive rack 301, through tooth meshing, drives the driven gear 5011 to rotate, which in turn drives the output shaft 501 to rotate synchronously. The output shaft 501 transmits rotational power to the threaded screw 502 through the one-way meshing structure of the pawl 5012 and the ratchet 5021. When the threaded screw 502 rotates, it drives the transmission piston 503 to make linear motion in the oil reservoir 5 using the thread transmission principle, forcing the lubricating oil in the oil reservoir 5 into the oil delivery pipe 401 through the pipe interface 504. The lubricating oil is distributed along the oil delivery pipe 401 to each lubricating sponge 4, completing the initial oil storage.

[0043] As the gear set continues to rotate, the meshing gear body 1 compresses the lubricating sponge 4. The compressed lubricating sponge 4 evenly releases the stored lubricating oil onto the surface of the gear teeth 2, achieving precise lubrication. After this process, the return spring 302 releases its elastic potential energy, driving the drive rack 301 to reset. Although the drive rack 301 drives the output shaft 501 to rotate in the opposite direction, due to the one-way limiting characteristics of the pawl 5012 and ratchet 5021, the threaded screw 502 will not reverse, ensuring that the transmission piston 503 only produces a single, minute displacement when the drive rod 3 is compressed, preventing lubricating oil backflow. Through the cooperation between the pitch of the threaded screw 502 and the transmission piston 503, lubricating oil is delivered quantitatively as needed, continuously providing stable lubrication for the gear teeth 2. Simply open the inspection window 6 periodically, remove the oil tank 5, and directly reverse one end of the threaded screw 502 to reset the transmission piston 503. Lubricating oil can then be easily added through the oil filler port 505.

[0044] The following points should be noted in this article:

[0045] 1. The accompanying drawings of this embodiment only involve the structures involved in this embodiment; other structures can refer to the general design.

[0046] 2. Where there is no conflict, this embodiment and the features in the embodiment can be combined with each other to obtain new embodiments.

[0047] The above are merely specific implementations of this embodiment, but the protection scope of this embodiment is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this embodiment should be included within the protection scope of this embodiment. Therefore, the protection scope of this embodiment should be determined by the protection scope of the claims.

Claims

1. A printer plastic gear with built-in lubrication structure, characterized in that: The printer plastic gear with built-in lubricating structure comprises a gear body (1), a gear tooth (2), a driving rod (3), a lubricating sponge (4), an oil tank (5), an inspection window (6), a one-way limiting assembly and a lubricating assembly, a plurality of gear teeth (2) are arranged, and the plurality of gear teeth (2) are circumferentially arranged on the outside of the gear body (1); the driving rod (3) is slidingly connected in the inside of the gear body (1), and the driving rod (3) is located at the middle position of the two gear teeth (2); at least two lubricating sponges (4) are arranged, and the two lubricating sponges (4) are fixedly installed on the outside of the gear body (1) and located at the middle position of the two gear teeth (2); the oil tank (5) is arranged in the inside of the gear body (1); the inspection window (6) is bolted on the front side of the gear body (1); the one-way limiting assembly is arranged in the inside of the gear body (1); and the lubricating assembly is arranged in the inside of the gear body (1).

2. The printer plastic gear with built-in lubrication structure as claimed in claim 1, wherein: The one-way limiting assembly comprises a threaded screw rod (502) and a ratchet wheel (5021), the threaded screw rod (502) is rotationally connected in the inside of the oil tank (5), and the ratchet wheel (5021) is fixedly installed at one end of the threaded screw rod (502).

3. The printer plastic gear with built-in lubrication structure of claim 2, wherein: The one-way limiting assembly further comprises an output shaft (501) and a pawl (5012), the output shaft (501) is rotationally connected at one end of the threaded screw rod (502), and the pawl (5012) is installed at one end of the output shaft (501), and the pawl (5012) and the ratchet wheel (5021) form a one-way meshing structure.

4. The printer plastic gear with built-in lubrication structure of claim 1, wherein: The lubricating assembly comprises a mounting groove (101), the mounting groove (101) is arranged in the inside of the gear body (1), and the oil tank (5) is clamped in the inside of the mounting groove (101).

5. The printer plastic gear with built-in lubrication structure of claim 4, wherein: The lubricating assembly further comprises a driving rack (301) and a return spring (302), the driving rack (301) is slidingly connected in the inside of the mounting groove (101), the driving rack (301) is fixedly installed at the tail end of the driving rod (3), one end of the return spring (302) is fixedly installed at the bottom end of the driving rack (301), and the other end of the return spring (302) is fixedly installed in the inside of the mounting groove (101).

6. The printer plastic gear with built-in lubrication structure of claim 4, wherein: The lubricating assembly further comprises a driven gear (5011) and a transmission piston (503), the driven gear (5011) is fixedly installed at one end of the output shaft (501), the driven gear (5011) and the driving rack (301) are meshed with each other, and the transmission piston (503) is slidingly connected in the inside of the oil tank (5) and is threadedly connected outside the threaded screw rod (502).

7. The printer plastic gear with built-in lubrication structure of claim 4, wherein: The lubricating assembly further comprises a pipeline interface (504), an oil injection port (505) and an oil delivery pipe (401), the pipeline interface (504) is fixedly installed on one side of the oil tank (5), the oil injection port (505) is arranged on the front side of the oil tank (5), one end of the oil delivery pipe (401) is clamped in the inside of the pipeline interface (504), and the oil delivery pipe (401) is fixedly connected to the inside of the two lubricating sponges (4) respectively.

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