阅读说明：本技术 一种截割齿轮箱及等距型面轴传动保护装置 (Cutting gear box and equidistant profile shaft transmission protection device ) 是由 郭进彬 马福文 张小峰 张强 王炳效 郭治富 马凯 吕继双 申国建 郭大武 庞宇 于 2021-01-08 设计创作，主要内容包括：本发明属于动力截割头技术领域,具体是一种截割齿轮箱及等距型面轴传动保护装置。小锥齿轮上开有与低速箱体连通的润滑油道,型面轴上开有与润滑油道连通的径向孔,径向孔与型面轴和小锥齿轮的接触面连通,小锥齿轮顶端内侧与型面轴之间设置有油槽I,油槽I上侧设置有反向油封,小锥齿轮上端外侧与减速箱壳体之间设置有油槽II,油槽II底部设置有油封,油封介于小锥齿轮外侧和减速箱壳体内侧之间。本发明针对传动轴三角型面轴连接段磨损失效及断裂现象,通过在有限空间设置反向密封,实现型面轴储油润滑下的油膜传扭,减少型面轴孔磨损,延长使用寿命。(The invention belongs to the technical field of power cutting heads, and particularly relates to a cutting gear box and an equidistant profile shaft transmission protection device. The bevel pinion goes up to open has the lubricated oil duct with the low-speed box intercommunication, the epaxial radial hole that has with lubricated oil duct intercommunication of opening of profile, the contact surface intercommunication of radial hole and profile axle and bevel pinion, be provided with oil groove I between bevel pinion top inboard and the profile axle, oil groove I upside is provided with reverse oil blanket, be provided with oil groove II between the bevel pinion upper end outside and the gear box casing, oil groove II bottom is provided with the oil blanket, the oil blanket is between the bevel pinion outside and the gear box casing inboard. Aiming at the phenomena of wear failure and fracture of the connecting section of the triangular surface shaft of the transmission shaft, the reverse seal is arranged in the limited space, so that oil film torque transmission under the lubrication of the oil storage of the surface shaft is realized, the wear of the surface shaft hole is reduced, and the service life is prolonged.)

1. The utility model provides a cutting gear box and equidistance profile shaft transmission protection device which characterized in that: comprises a speed reducer shell (12), wherein the upper part of the speed reducer shell (12) is a high-speed box body (13), the inside of the speed reducer shell (12) is a low-speed box body (14), a main shaft (1) is arranged in the low-speed box body (14), the end part of the main shaft (1) is meshed with a small bevel gear (2), the small bevel gear (2) is sleeved at the lower end of a profile shaft (3), the middle part of the bevel gear (2) is fixed on a bearing II (5), the bearing II (5) is arranged on an end cover (6) fixed in the speed reducer shell (12), the outer side of the upper part of the small bevel gear (2) is arranged on the speed reducer shell (12) through a bearing I (4), the upper part of the small bevel gear (2) is sleeved at the lower end of the small face shaft (3), a shaft sleeve (11) is sleeved at the outer side of the small face shaft (3), the upper end of the profile shaft (3) is arranged in the high-speed, the gear speed changing structure is connected with the power input structure; the small bevel gear (2) is provided with a lubricating oil channel (7) communicated with a low-speed box body (12), the profile shaft (3) is provided with a radial hole (8) communicated with the lubricating oil channel (7), the radial hole (8) is communicated with contact surfaces of the profile shaft (3) and the small bevel gear (2), an oil groove I (16) is arranged between the inner side of the top end of the small bevel gear (2) and the profile shaft (3), a reverse oil seal (10) is arranged on the upper side of the oil groove I (16), an oil groove II (15) is arranged between the outer side of the upper end of the small bevel gear (2) and the speed reducer box body (12), an oil seal (9) is arranged at the bottom of the oil groove II (15), and the oil seal (9) is arranged between the outer side of the small bevel gear (2) and the inner side of the.

2. The cutting gearbox and equidistant profile shaft drive protection device of claim 1, wherein: the radial holes (8) are uniformly distributed with 3 groups along the radial direction of the profile shaft at 120 degrees.

3. The cutting gearbox and equidistant profile shaft drive protection device of claim 2, wherein: the spline of the profile shaft (3) adopts crowned teeth.

4. The cutting gearbox and equidistant profile shaft drive protection device of claim 3, wherein: and the surface of the profile shaft (3) is subjected to nitriding treatment.

Technical Field

The invention belongs to the technical field of power cutting heads, and particularly relates to a cutting gear box and an equidistant profile shaft transmission protection device.

Background

The equidistant profile shaft transmission is applied to a power cutting head, in particular to a triangular equidistant profile shaft for transmitting large torque, and the triangular equidistant profile shaft is longitudinally arranged at a connecting section of a high-speed box body and a low-speed box body of a cutting speed reducer. The triangular profile shaft section of the equidistant profile shaft is matched with the inner profile hole of the bevel pinion, and the other end of the equidistant profile shaft is in spline fit connection. The size of the connecting section of the high-low speed box body is influenced by the distribution of the cutting teeth of the drum on the outer side of the power cutting head, and the transverse size of the connecting section cannot be too large, so that the characteristics of compact connecting structure and large transmission torque of a profile shaft are formed. In actual use, heavy-load torque transmission is realized through a dynamic pressure lubricating oil film between profile shaft holes, and the following problems are specifically existed: (1) because the effective lubrication is lacked among the shaft holes of the molded surface, the molded surface transmission is always in dry friction operation without an oil film, and the phenomena of abrasion failure and fatigue fracture are easy to occur; (2) the profile shaft penetrates through the high-speed box body and the low-speed box body, and has the characteristics of large longitudinal size and insufficient rigidity. Under the action of heavy-load torque transmission, the slender shaft is easy to flex and deform, so that the torque transmission of the spline connecting section and the profile shaft hole connecting section is asynchronous, and the abrasion of the spline and the profile shaft hole is aggravated.

Disclosure of Invention

The invention aims to solve the technical problems and provides a cutting gear box and an equidistant profile shaft transmission protection device.

The invention adopts the following technical scheme: a cutting gear box and equidistant profile shaft transmission protection device comprises a reduction box shell, wherein a high-speed box body is arranged at the upper part of the reduction box shell, a low-speed box body is arranged inside the reduction box shell, a main shaft is arranged in the low-speed box body, the end part of the main shaft is meshed with a small bevel gear, the small bevel gear is sleeved at the lower end of a profile shaft, the middle part of the bevel gear is fixed on a bearing II, the bearing II is arranged on an end cover fixed inside the reduction box body, the outer side of the upper part of the small bevel gear is arranged on the reduction box shell through a bearing I, the upper part of the small bevel gear is sleeved at the lower end of a small profile shaft, a shaft sleeve is sleeved at the outer side of the small profile shaft, the upper end of the profile shaft is arranged; the bevel pinion on open have with the lubricating oil duct of low-speed box intercommunication, the epaxial radial hole that has with lubricating oil duct intercommunication of opening of profile, the contact surface intercommunication of radial hole and profile axle and bevel pinion, be provided with oil groove I between bevel pinion top inboard and the profile axle, oil groove I upside is provided with reverse oil blanket, be provided with oil groove II between the bevel pinion upper end outside and the gear box casing, oil groove II bottom is provided with the oil blanket, the oil blanket is between the bevel pinion outside and the gear box casing inboard.

Further, the radial hole is along profile shaft radial 120 evenly distributed 3 groups.

Furthermore, the spline of the profile shaft adopts crowned teeth.

Further, the surface of the profile shaft is subjected to nitriding treatment.

Compared with the prior art, the invention aims at the phenomena of abrasion failure and fracture of the connecting section of the triangular surface shaft of the transmission shaft, realizes oil film torque transmission under the lubrication of the oil storage of the surface shaft by arranging reverse seal in a limited space, reduces the abrasion of the surface shaft hole and prolongs the service life; specifically for reduction gear low-speed box lubricating oil gets into the profile hole through the bevel gear oil duct, and the rethread is followed profile axial diameter 120 evenly distributed's oilhole and is fully lubricated, wherein reverse sealed being provided with does benefit to the oil storage lubrication that forms between the profile shaft hole, avoids along with cutting lubricating oil flow spline shaft and axle sleeve room under the different high low-order cutting gesture of reduction gear to play lubricated effect.

Drawings

FIG. 1 is a front view of the structure of the present invention;

FIG. 2 is a view showing a structure of a lubricating oil passage of the present invention;

FIG. 3 is a schematic view of a profile shaft configuration;

FIG. 4 is a view A-A of FIG. 3;

FIG. 5 is a view taken along direction K in FIG. 3;

in the figure, 1-a main shaft, 2-a bevel pinion, 3-a profile shaft, 4-a bearing I, 5-a bearing II, 6-an end cover, 7-a lubricating oil channel, 8-a radial hole, 9-an oil seal, 10-a reverse oil seal, 11-a shaft sleeve, 12-a speed reducing box shell, 13-a high-speed box body, 14-a low-speed box body, 15-an oil groove II and 16-an oil groove I.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments; all other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1-2, the equidistant profile shaft transmission protection device of the cutting gear box comprises a reduction gearbox shell 12, a high-speed box body 13 is arranged at the upper part of the reduction gearbox shell 12, a low-speed box body 14 is arranged inside the reduction gearbox shell 12, a main shaft 1 is arranged in the low-speed box body 14, the end part of the main shaft 1 is meshed with a small bevel gear 2, the small bevel gear 2 is sleeved at the lower end of a profile shaft 3, the middle part of the bevel gear 2 is fixed on a bearing II5, a bearing II5 is arranged on an end cover 6 fixed inside the reduction gearbox shell 12, the outer side of the upper part of the small bevel gear 2 is arranged on the reduction gearbox shell 12 through a bearing I4, the upper part of the small bevel gear 2 is sleeved at the lower end of a small profile shaft 3, a shaft sleeve 11, and is connected with a gear speed change structure arranged in the high-speed box body 13, and the gear speed change structure is connected with a power input structure; the bevel pinion 2 on open and to have the lubricated oil duct 7 with low-speed box 12 intercommunication, open on the profile shaft 3 and to have the radial hole 8 with lubricated oil duct 7 intercommunication, radial hole 8 and profile shaft 3 and bevel pinion 2's contact surface intercommunication, be provided with oil groove I16 between bevel pinion 2 top inboard and the profile shaft 3, oil groove I16 upside is provided with reverse oil blanket 10, be provided with oil groove II15 between bevel pinion 2 upper end outside and reducing gear box casing 12, oil groove II15 bottom is provided with oil blanket 9, oil blanket 9 is between bevel pinion 2 outside and reducing gear box casing 12 inboard.

The oil film torque transmission under the oil storage lubrication of the profile shaft 3 is realized by arranging the oil seal 9 and the reverse oil seal 10 in a limited space. Specifically, the lubricating oil of the low-speed box body 12 of the speed reducer enters the radial hole 8 through the lubricating oil channel 7 and is fully lubricated through oil holes which are uniformly distributed along the radial direction of the profile shaft 3. The arrangement of the oil seal 9 and the reverse oil seal 10 is beneficial to oil storage lubrication between profile shaft holes, and lubricating oil is prevented from flowing into the space between the profile shaft 3 and the shaft sleeve 11 along with different high and low cutting postures of the speed reducer, so that the lubricating effect is not achieved. On the premise that the oil seal 9 and the reverse oil seal 10 meet the structural strength design requirement, oil storage lubrication between profile shaft holes is realized, the formation of a dynamic pressure lubricating oil film is ensured, dry friction operation is avoided, and long-life transmission is realized.

The radial holes 8 are uniformly distributed in 3 groups along the radial direction of the profile shaft at 120 degrees. The multiple groups of radial holes 8 can realize sufficient lubrication among the profile shaft holes, and the lubricating performance is improved.

The splines of the profile shaft 3 adopt crowned teeth. The problem of aggravation of wear is not synchronous to the biography that the longitudinal dimension of profile axle is big, and the flexural deformation that the rigidity is not enough arouses and bring, through adopting the cydariform spline, can realize the adaptation to flexural deformation, forms the connection of floating, plays the equal effect of carrying to spline connection and profile connection, effectively reduces wearing and tearing, increase of service life. On the premise of meeting the connection strength, the profile shaft 3 of the crowned teeth improves the adaptability of flexural deformation under the action of heavy-load torque transmission of the profile shaft 3 and plays a role in floating load balancing.

The surface of the profile shaft 3 is nitrided. The wear resistance is enhanced, the sealing matching shaft diameter section is subjected to polishing treatment after nitridation, the sealing friction resistance is further reduced, and the service life of the seal is prolonged.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.