High-precision gear shaft

Abstract

The utility model provides a high-precision gear shaft, and belongs to the technical field of gear transmission devices. The problem that an existing gear shaft and a gear are prone to abrasion in transmission is solved. The high-precision gear shaft comprises a shaft body, gear tooth parts are arranged at the end of the shaft body, a tooth groove is formed between every two spaced gear tooth parts, the outer diameter of the shaft body is smaller than that of the gear tooth parts, the shaft body is sleeved with a sleeve shaft attached to the bottom edges of the gear tooth parts in a sealed mode, and a plurality of oil through holes are formed in the positions, corresponding to the shaft grooves, of the bottom edges of the gear tooth parts in the circumferential direction. The top of the sleeve shaft is provided with a plurality of protruding oil guide rods extending into the oil through holes, the oil guide rods are internally provided with oil cavities, the oil cavities are filled with grease, and the groove walls of the tooth grooves are provided with a plurality of oil throwing holes communicated with the corresponding oil through holes. The utility model has the advantages of high-efficiency lubrication and prolonged overall service life.

Description

TECHNICAL FIELD

[0001] The utility model belongs to gear transmission device technical field relates to a gear shaft, especially in high accuracy gear shaft. BACKGROUND

[0002] Gear and gear shaft transmission structure is very common in mechanical industry. And the two in transmission process due to meshing will lead to transmission wear, need to be replaced regularly, therefore the patent provides a kind of new high-precision gear shaft to reduce wear and improve transmission life to solve the above problems. SUMMARY

[0003] The utility model discloses a kind of high-precision gear shafts with self-lubricating effect, to solve the above problems in prior art.

[0004] The utility model discloses a kind of high-precision gear shafts, including shaft body, shaft body end portion has gear portion, and interval two gear portions between have gear slot, it is characterized in that, the outer diameter of the shaft body is less than the outer diameter size of gear portion, the sleeve shaft that the shaft body is connected with gear portion bottom edge sealingly is pasted on, gear portion bottom edge and the oil hole of being passed in the circumferential direction of corresponding shaft slot position is equipped with multiple, the sleeve shaft top has multiple protrusions and the oil guide rod of being inserted into the oil hole, the oil guide rod inside has oil cavity, the oil cavity is filled with grease, the groove wall of gear slot is equipped with multiple oil throwing holes that are communicated with corresponding oil hole.

[0005] In the above high-precision gear shaft, the threaded sleeve that the shaft body is connected with is screwed and limits sleeve shaft.

[0006] In the above high-precision gear shaft, the sleeve shaft top surface is coated with a layer of sealing glue.

[0007] Compared with prior art, the high-precision gear shaft has the advantages of efficient lubrication and improving overall working life. BRIEF DESCRIPTION OF DRAWINGS

[0008] Figure 1 It is the structure diagram in the high-precision gear shaft.

[0009] Figure 2 It is the partial sectional view in the high-precision gear shaft.

[0010] In the drawing, 1, shaft body;2, gear portion;3, gear slot;4, sleeve shaft;5, oil hole;6, oil guide rod;7, oil cavity;8, oil throwing hole;9, threaded sleeve. DETAILED DESCRIPTION

[0011] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0012] like Figure 1 , Figure 2 As shown, this high-precision gear shaft includes a shaft body 1, with a gear tooth portion 2 at one end of the shaft body 1, and a tooth groove 3 between two spaced gear tooth portions 2. The outer diameter of the shaft body 1 is smaller than the outer diameter of the gear tooth portion 2. A sleeve shaft 4 is sleeved on the shaft body 1 and is sealed and fitted to the bottom edge of the gear tooth portion 2. Multiple oil passage holes 5 are circumferentially opened at the bottom edge of the gear tooth portion 2 and at the position corresponding to the shaft groove. The top of the sleeve shaft 4 has multiple protrusions and oil guide rods 6 that extend into the oil passage holes 5. The oil guide rods 6 have an oil cavity 7 inside, which is filled with grease. Multiple oil throwing holes 8 are opened on the groove wall of the tooth groove 3 and communicate with the corresponding oil passage holes 5.

[0013] The oil guide rod 6 serves two purposes: firstly, it guides the mounting sleeve 4, enabling the sleeve 4 to rotate when the entire gear shaft rotates; secondly, the oil guide rod 6 is filled with grease, which decomposes into liquid oil when the gear shaft rotates at high speed and generates high temperature, and then passes through the oil passages 5 and finally is thrown out from the multiple oil throwing holes 8 to lubricate the meshing parts.

[0014] Preferably, the shaft 1 is threadedly connected to a threaded sleeve 9 that abuts against and limits the shaft 4.

[0015] Preferably, the top surface of the sleeve 4 is coated with a layer of sealant.

[0016] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0017] Although this document frequently uses terms such as shaft 1, gear tooth 2, tooth groove 3, sleeve shaft 4, oil passage hole 5, oil guide rod 6, oil cavity 7, oil slinger hole 8, and threaded sleeve 9, the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any additional limitation would contradict the spirit of this utility model.

Claims

1. A high-precision gear shaft comprising a shaft body (1) having gear teeth (2) at the ends thereof, and a tooth gap (3) between the two gear teeth (2) at intervals, characterized in that, The outer diameter of the shaft body (1) is smaller than the outer diameter of the gear part (2), the shaft body (1) is sleeved with a sleeve shaft (4) which is sealed and matched with the bottom edge of the gear part (2), a plurality of oil through holes (5) are arranged on the bottom edge of the gear part (2) and correspond to the shaft groove position, the sleeve shaft (4) has a plurality of protrusions on the top and the oil guide rods (6) which extend into the oil through holes (5), the oil guide rods (6) have oil cavities (7) inside, the oil cavities (7) are filled with grease, and a plurality of oil throwing holes (8) which are communicated with the corresponding oil through holes (5) are arranged on the groove wall of the gear groove (3).

2. A high precision gear shaft as claimed in claim 1, wherein, The shaft body (1) is threadedly connected with a threaded sleeve (9) which abuts against and limits the sleeve shaft (4).

3. The high-precision gear shaft according to claim 1, wherein The top surface of the sleeve shaft (4) is coated with a layer of sealing glue.

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