A drive gear with internal self-lubricating oil passages

Abstract

This utility model provides a drive gear with an internal self-lubricating oil channel. It relates to the field of gear technology and includes a gear disc. One end of the gear disc has an inner groove, in which a drive shaft is fixedly connected. A tube is formed through the end of the gear disc opposite to the drive shaft, and a bearing rod is inserted into the tube. An oil pipe is inserted into the bearing rod. An expansion plate, made of a thermal strain material, is filled inside the bearing rod. The beneficial effects of this utility model are: a thermal strain expansion oil supply structure is provided inside the gear disc between the drive shaft and the opposite bearing rod. Combined with the internal oil channel distribution within the gear and the centrifugal force during gear rotation, the internal oil fills the inner end of the gear disc's tooth groove and lubricates the contact end with the driven gear when in contact, achieving self-lubrication of the drive gear, reducing maintenance costs, and ensuring the stability of the drive gear during long-term operation.

Description

Technical Field

[0001] This utility model relates to the field of gear technology, and more specifically, to a drive gear with an internal self-lubricating oil passage. Background Technology

[0002] Drive gears are the core components of mechanical transmission systems. Their main function is to transmit power and motion accurately and reliably. Through the meshing of their own teeth with the mating gears, they efficiently convert the rotational force and motion of the input shaft (drive end) into the torque, speed or directional change required by the output shaft, thereby driving the entire equipment or subsequent mechanism to operate and bearing various loads generated during the transmission process. They are widely used in various mechanical equipment, vehicles and industrial devices and are an indispensable key component for power transmission.

[0003] In the existing technology, the amount of lubricating oil in the drive gear is affected by the high load and high temperature under long-term operation, and the lubricating oil is consumed rapidly. The external lubrication system has certain requirements for the maintenance of the drive gear assembly structure and the subsequent lubrication oil passage structure. There is a lack of a lubrication structure that can maintain low maintenance costs to solve this dilemma. Utility Model Content

[0004] The technical problem to be solved by this utility model is that the existing drive gear oil lubrication structure has requirements on the assembly structure of the drive gear, and the external lubrication system needs to be maintained. In view of the above problems, a drive gear with an internal self-lubricating oil channel is provided.

[0005] The purpose and effect of this utility model are achieved by the following specific technical means: including a toothed disc, one end of which is provided with an inner groove, and a drive shaft is fixedly connected in the inner groove; a tube is formed through the end of the toothed disc relative to the drive shaft, and a bearing rod is inserted into the tube, and an oil pipe is inserted into the bearing rod.

[0006] An expansion plate is filled at the inner end of the bearing rod. The expansion plate is made of thermal strain material. A piston shaft is fixed on the expansion plate, and an oil pipe groove is formed between the piston shaft and the oil pipe.

[0007] An inner oil passage is formed in the toothed disc, and an oil supply groove is formed on the outside of the inner groove of the inner oil passage. The oil supply groove is connected to the oil pipe groove. A pair of oil passage openings are symmetrically arranged between the tooth grooves on both sides of the toothed disc, and the oil passage openings are connected to the inner oil passage.

[0008] A further preferred embodiment: the drive shaft and the insertion tube are through-hole groove structures, and the bearing rod is rotatably engaged with the drive shaft.

[0009] A further preferred embodiment: the piston shaft and the connection end of the expansion plate are formed with an arched fascia layer, and the axial position change of the fascia layer is positively correlated with the expansion position of the expansion plate.

[0010] A further preferred embodiment: the connection end between the piston shaft and the oil pipe groove is a one-way valve port structure.

[0011] A further preferred embodiment: suction holes are formed on both sides of the inner end of the oil passage.

[0012] A further preferred embodiment: a pair of hydraulic plugs are formed between the oil supply groove and the insertion pipe, and the hydraulic plugs are connected to the oil pipe groove.

[0013] The beneficial effects of this utility model are:

[0014] This type of drive gear has a thermally strain-induced expansion oil supply structure installed inside the gear disc between the drive shaft and the opposite bearing rod. Combined with the internal oil passage distribution inside the gear and the centrifugal force when the gear rotates, the internal oil can fill the inner end of the gear disc tooth groove and lubricate the contact end with the driven gear when in contact, thus achieving self-lubrication of the drive gear, reducing maintenance costs, and ensuring the stability of the drive gear under long-term operation. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings.

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the internal planar structure of the toothed disc of this utility model;

[0018] Figure 3 This is a schematic diagram of the internal planar structure of the bearing rod of this utility model;

[0019] Figure 4 This is a schematic diagram of the internal planar structure of the oil passage of this utility model.

[0020] Figures 1-4 In the middle: 1. Gear disc, 2. Drive shaft, 3. Bearing rod, 4. Oil pipe, 5. Insert pipe, 6. Oil passage, 7. Inner groove, 8. Hydraulic plug, 9. Oil supply groove, 10. Inner oil passage, 11. Suction hole, 12. Expansion plate, 13. Oil pipe groove, 14. Piston shaft. Detailed Implementation

[0021] To better understand the above-mentioned objectives, features, and advantages of this utility model, the following description is provided in conjunction with the accompanying drawings. Figures 1-3The present invention will be further described in detail below with specific embodiments. The following embodiments are merely examples for implementing the present invention. It must be noted that the disclosed embodiments do not limit the scope of the present invention. On the contrary, any modifications and refinements made without departing from the scope of the present invention are within the patent protection scope of the present invention.

[0022] A drive gear with an internal self-lubricating oil passage includes a gear disk 1, an inner groove 7 is provided at one end of the gear disk 1, and a drive shaft 2 is fixedly connected in the inner groove 7. A tube 5 is formed through the gear disk 1 relative to the drive shaft 2, and a bearing rod 3 is inserted into the tube 5. An oil pipe 4 is inserted into the bearing rod 3.

[0023] An expansion plate 12 is filled and installed at the inner end of the bearing rod 3. The expansion plate 12 is a thermal strain material. A piston shaft 14 is fixed on the expansion plate 12, and an oil pipe groove 13 is formed between the piston shaft 14 and the oil pipe 4.

[0024] An inner oil passage 10 is formed in the gear disk 1. An oil supply groove 9 is formed on the outside of the inner groove 7 of the inner oil passage 10. The oil supply groove 9 is connected to the oil pipe groove 13. A pair of oil passage openings 6 are symmetrically arranged between the two tooth grooves of the gear disk 1. The oil passage openings 6 are connected to the inner oil passage 10.

[0025] The drive gear uses a gear disk 1, a bearing rod 3, and a drive shaft 2 as the drive shaft and bearing structure, respectively. Based on this mounting structure, the gear disk 1 meshes with the driven gear through teeth distributed at its outer end. The gear disk 1 has oil passages 6 formed at the tooth grooves of its teeth. When the gear disk 1 rotates continuously under drive, the rotating ends of the drive shaft 2 and bearing rod 3 generate heat through friction, which acts on the expansion plate 12 in the bearing rod 3. When the expansion plate 12 reaches its deformation temperature, its expansion drives the piston shaft 14 to perform axial compression along the oil pipe groove 13, thereby increasing the oil pipe's diameter through the movement of the piston shaft 14. The internal hydraulic system of the oil pipe groove 13 compresses the lubricating oil in the oil pipe groove 13 into the oil supply groove 9. When the oil supply groove 9 and the internal oil passage 10 are full of oil, the release force generated by the rotation of the gear disk 1 squeezes the lubricating oil out of the oil passage opening 6. When the gear disk 1 rotates and meshes with the driven gear, the oil squeezed out of the oil passage opening 6 wets the meshing end of the driven gear and the gear disk 1, thus completing self-lubrication. Compared with the traditional external gear lubrication system, this drive gear facilitates the assembly and docking of the drive gear through the internal lubrication oil passage and can complete the lubrication maintenance of the gear under long-term braking with the oil supply of the oil pipe 4, thus improving the applicability and practicality of the drive gear.

[0026] Based on the above, the drive shaft 2 and the insertion tube 5 are through-groove structures, and the bearing rod 3 is rotatably engaged with the drive shaft 2. The through-groove structure of the drive shaft 2 and the insertion tube 5 can improve the axial accuracy of the drive shaft 2 and the bearing rod 3 and ensure the axial stability of the gear disk 1 when it rotates.

[0027] Furthermore, an arched fascia layer is formed at the connection end between the piston shaft 14 and the expansion plate 12, and the axial position change of the fascia layer is positively correlated with the expansion position of the expansion plate 12, such as... Figure 3 As shown, when the expansion plate 12 is heated and expands, it will cause the fascia layer on the arched surface below the piston shaft 14 to be compressed and arched, so as to cooperate with the axial limiting of the piston shaft 14 to complete the axial compression action.

[0028] Furthermore, the connection end between the piston shaft 14 and the oil pipe groove 13 is a one-way valve port structure. A pair of hydraulic plugs 8 are formed between the oil supply groove 9 and the insertion pipe 5, and the hydraulic plugs 8 are connected to the oil pipe groove 13. Figure 2 , 4 As shown, the axial expansion of the piston shaft 14 will squeeze the oil pipe groove 13 inward along the axial direction. The hydraulic plug 8 will open and close due to the hydraulic pressure change at the end of the oil pipe groove 13, thereby connecting the oil supply groove 9 and the oil pipe groove 13.

[0029] Furthermore, suction holes 11 are formed on both sides of the inner end of the oil passage 6, such as... Figure 4 As shown, the suction holes 11 distributed along both sides of the oil passage 6 will be squeezed out to the tooth groove end of the toothed disc 1 along with the inner oil passage 10. The distribution of the suction holes 11 is used to limit the oil flow rate and ensure that the oil extrusion volume is maintained within a stable range.

[0030] Implementation method:

[0031] The gear disk 1 meshes with the driven gear through the teeth distributed at its outer end. When the gear disk 1 rotates continuously under driving conditions, the rotating ends of the drive shaft 2 and the bearing rod 3 will act on the expansion plate 12 in the bearing rod 3 through the heat generated by friction. When the temperature of the expansion plate 12 reaches the deformation temperature, the expansion of the expansion plate 12 will drive the piston shaft 14 to perform axial compression along the oil pipe groove 13. In turn, the movement of the piston shaft 14 increases the hydraulic pressure inside the oil pipe groove 13. The hydraulic pressure compresses the lubricating oil filled in the oil pipe groove 13 into the oil supply groove 9. When the oil supply groove 9 and the inner oil passage 10 are filled with oil, the lubricating oil is squeezed out of the oil passage opening 6 by the release force generated by the rotation of the gear disk 1. When the gear disk 1 rotates and meshes with the driven gear, the oil squeezed out from the oil passage opening 6 wets the meshing end of the driven gear and the gear disk 1.

[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A drive gear with an internal self-lubricating oil passage, characterized in that: Includes a gear disk (1), one end of which is provided with an inner groove (7), and a drive shaft (2) is fixedly connected in the inner groove (7). A tube (5) is formed through the end of the gear disk (1) relative to the drive shaft (2), and a bearing rod (3) is inserted into the tube (5), and an oil pipe (4) is inserted into the bearing rod (3). The inner end of the bearing rod (3) is filled with an expansion plate (12), the expansion plate (12) is a thermal strain material, a piston shaft (14) is fixed on the expansion plate (12), and an oil pipe groove (13) is formed between the piston shaft (14) and the oil pipe (4). An inner oil passage (10) is formed in the toothed disc (1). An oil supply groove (9) is formed on the outside of the inner groove (7) of the inner oil passage (10). The oil supply groove (9) is connected to the oil pipe groove (13). A pair of oil passage openings (6) are symmetrically arranged between the tooth grooves on both sides of the toothed disc (1). The oil passage openings (6) are connected to the inner oil passage (10).

2. A drive gear with an internal self-lubricating oil passage according to claim 1, characterized in that: The drive shaft (2) and the insertion tube (5) are through-hole groove structures, and the bearing rod (3) is rotatably engaged with the drive shaft (2).

3. A drive gear with an internal self-lubricating oil passage according to claim 1, characterized in that: The piston shaft (14) and the expansion plate (12) are connected by an arched fascia layer, and the axial position change of the fascia layer is positively correlated with the expansion position of the expansion plate (12).

4. A drive gear with an internal self-lubricating oil passage according to claim 1, characterized in that: The connection end between the piston shaft (14) and the oil pipe groove (13) is a one-way valve port structure.

5. A drive gear with an internal self-lubricating oil passage according to claim 1, characterized in that: The oil passage (6) has suction holes (11) formed by the inward concavity on both sides of its inner end.

6. A drive gear with an internal self-lubricating oil passage according to claim 1, characterized in that: A pair of hydraulic plugs (8) are formed between the oil supply groove (9) and the insertion pipe (5), and the hydraulic plugs (8) are connected to the oil pipe groove (13).

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