Structure of a toothed coupling for efficient cooling

Abstract

The present invention relates to a structure of a toothed coupling with efficient cooling. The toothed shaft is connected to the input end gear ring and the output end gear ring respectively through the meshing teeth on both sides, and the axial limit is achieved through a retaining ring. The tooth surfaces of the main meshing regions of the toothed shaft with the input end gear ring and the output end gear ring are respectively communicated with the bottom oil inlet holes at both ends of the toothed shaft, and the bottom oil inlet holes of the toothed shaft are communicated with the whole-ring oil collecting groove arranged near the oil supply side of the toothed shaft, so that the lubricating oil enters the tooth surface of the main meshing region through the oil collecting groove and the bottom oil inlet hole of the toothed shaft to form a main lubricating oil path; the bottom oil inlet holes of the toothed shaft are respectively communicated with the tooth surfaces of the non-meshing regions, and there is a gap between the inner side surface of the toothed shaft and the retaining ring, so that the lubricating oil enters the tooth surfaces of the non-meshing regions through the oil collecting groove and the bottom oil inlet holes of the toothed shaft and flows out near the retaining ring on the side surface of the toothed shaft to form an auxiliary lubricating oil path. The present invention can effectively avoid tooth surface burning and wear caused by poor tooth surface lubrication and cooling, effectively improve the overall use safety of the toothed coupling, and extend the service life cycle.

Description

Technical Field

[0001] The present invention relates to a coupling, and in particular to a coupling suitable for various types of toothed couplings. Background Art

[0002] Toothed couplings are mainly used to connect two different rotating shafts and transmit torque. Figure 1 Shown is a simplified diagram of a commonly used toothed coupling at present, which mainly consists of a toothed shaft, an input end tooth ring, and an output end tooth ring. The two end tooth rings are respectively connected to the rotating shafts by bolts. Oil spray pipes are arranged on both sides of the toothed shaft for oil supply. A number of oil inlet holes are evenly distributed in the middle of the toothed shaft. Under the action of centrifugal force, lubricating oil enters through the oil inlet holes, flows out after passing through the tooth side clearance, forming the entire lubrication and cooling circuit. In this lubrication and cooling method of this structure, the flow distribution between different meshing teeth is uneven, the resistance of the entire oil circuit system is relatively large, the total amount of oil entering the tooth surface is limited, and the overall lubrication and cooling effect is not good. When the transmitted torque is relatively large, the heat of the meshing tooth surface cannot be taken away in time, and the tooth surface is prone to burning and wear, which is not conducive to the long-term safe and reliable use of the toothed coupling. Summary of the Invention

[0003] The present invention aims to propose a toothed coupling structure with efficient cooling. Through the close cooperation among the oil collecting groove, the tooth ring end face oil drain hole, the toothed shaft bottom oil inlet hole, and the toothed shaft side retaining ring, the toothed coupling has a good lubrication and cooling state under the actual operating conditions, improving the long-term operating safety and service life of the toothed coupling.

[0004] To achieve the above object, the technical solution of the present invention is: a toothed coupling structure with efficient cooling, including a toothed shaft, an input end tooth ring, and an output end tooth ring. The toothed shaft is connected to the input end tooth ring and the output end tooth ring respectively through the meshing teeth on both sides, and the axial limit is achieved through a retaining ring. The tooth surfaces of the main meshing regions of the toothed shaft with the input end tooth ring and the output end tooth ring are respectively communicated with the bottom oil inlet holes at both ends of the toothed shaft, and the bottom oil inlet holes of the toothed shaft are connected to the entire circle of oil collecting grooves arranged on the side of the toothed shaft close to the oil supply side, so that the lubricating oil enters the tooth surfaces of the main meshing regions through the oil collecting grooves and the bottom oil inlet holes of the toothed shaft, forming the main lubricating oil path; the bottom oil inlet holes at both ends of the toothed shaft are respectively communicated with the tooth surfaces of the non-meshing regions of the toothed shaft with the input end tooth ring and the output end tooth ring. There is a gap between the inner side surface of the toothed shaft and the retaining ring, so that the lubricating oil enters the tooth surfaces of the non-meshing regions through the oil collecting grooves and the bottom oil inlet holes of the toothed shaft, and flows out near the toothed shaft side retaining ring to form an auxiliary lubricating oil path.

[0005] Further, the input end tooth ring is connected to the input rotating shaft through uniformly distributed tapered bolts and nuts in a whole circle; the output end tooth ring is connected to the output rotating shaft through uniformly distributed tapered bolts and nuts in a whole circle.

[0006] Further, drain holes are evenly distributed in the middle parts of the input end gear ring and the output end gear ring respectively. The drain holes and the precision bolts are staggered and evenly distributed, which can ensure that there is no blockage on the outlet side of the drain holes and the whole oil circuit is unobstructed.

[0007] Further, the inlet side of the drain hole is close to the end face of the gear shaft, and the outlet side of the drain hole is located at the outer end faces of the input end gear ring and the output end gear ring.

[0008] Further, the outlet of the drain hole is located at a position higher than the inlet, forming a certain height difference, which can provide sufficient centrifugal force for oil drainage.

[0009] Further, an integral oil collecting groove is arranged on the gear shaft close to the oil supply side, and oil inlet holes are evenly distributed between the bottom of each tooth groove of the gear shaft and the oil collecting groove.

[0010] Further, the inlet side of the oil inlet hole is located at the top of the oil collecting groove, and the outlet side of the oil inlet hole is located at the bottom of the tooth groove on the gear shaft, which is at the position of 1 / 3 tooth width.

[0011] The beneficial effects of the present invention are as follows:

[0012] Through the design of the novel and highly efficient cooling structure of the gear coupling, the gear coupling has good lubrication and cooling states under the actual operating conditions, effectively avoiding tooth surface burning and wear caused by poor tooth surface lubrication and cooling, effectively improving the overall use safety of the gear coupling, and extending the service life cycle. Description of the Drawings

[0013] Figure 1 is a structural schematic diagram of the existing gear coupling;

[0014] Figure 2 is a structural schematic diagram of the highly efficient cooling gear coupling of the present invention;

[0015] Figure 3 is an enlarged schematic diagram of the oil circuit part in the structure of the highly efficient cooling gear coupling of the present invention;

[0016] Figure 4 is a structural diagram of the oil inlet hole of the gear shaft;

[0017] Figure 5 is Figure 4 a partial enlarged view at I in

[0018] Figure 6 is Figure 5 a sectional view taken along A-A in

[0019] Figure 7 is a structural diagram of the drain hole of the gear ring;

[0020] Figure 8 is Figure 7 a partial enlarged view at II in

[0021] Figure 9 is Figure 8 A sectional view along B-B in the middle;

[0022] In the figure: 1. Input end gear ring, 2. Nut, 3. Precision reamed bolt, 4. Gear shaft, 5. Output end gear ring, 6. Retaining ring, 7. Oil passage 1, 8. Oil passage 2, 9. Oil sump, 10. Oil inlet hole, 11. Oil drain hole. Specific implementation mode

[0023] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0024] As Figure 2 , as shown in Fig. 3, the structure of the high-efficiency cooling gear coupling of the present invention includes an input end gear ring 1, an output end gear ring 5, a gear shaft 4, etc.

[0025] The input end gear ring 1 is connected to the input rotating shaft through precision reamed bolts 3 and nuts 2 evenly distributed in a circle, the output end gear ring 5 is connected to the output rotating shaft through precision reamed bolts 3 and nuts 2 evenly distributed in a circle, and the gear shaft 4 is connected to the input end gear ring 1 and the output end gear ring 5 through meshing teeth on both sides, and axial limit is achieved through a retaining ring 6.

[0026] As Figures 4 to 6 shown, a whole-circle oil sump 9 is arranged on the gear shaft 4 close to the oil supply side, and oil inlet holes 10 are evenly arranged between the bottom of each tooth groove of the gear shaft 4 and the oil sump 9. The inlet side of the oil inlet hole 10 is located at the top of the oil sump 9, and the outlet side of the oil inlet hole 10 is located at the bottom of the tooth groove on the gear shaft, at about 1 / 3 of the tooth width position.

[0027] As Figures 7 to 9 shown, oil drain holes 11 are evenly arranged in the middle of the input end gear ring 1 and the output end gear ring 5. The inlet side of the oil drain hole 11 is close to the end face of the gear shaft 4, and the outlet side of the oil drain hole 11 is located at the outer end face of the input end gear ring 1 and the output end gear ring 5. At the same time, there is a certain height difference between the inlet and outlet of the oil drain hole 11, which can provide sufficient centrifugal force for oil drainage. The oil drain holes 11 are staggered and evenly distributed with the precision reamed bolts 3 to ensure that there is no blockage on the outlet side of the oil drain holes 11 and the whole oil passage is unobstructed.

[0028] The lubricating oil of this gear coupling enters the meshing area inside the gear shaft 4 and the input end gear ring 1 and the output end gear ring 5 from the oil sump 9 through the oil inlet holes 10. Most of the lubricating oil lubricates and cools the tooth surface through the oil passage 1 7 and is thrown out through the oil drain holes 11 under the action of centrifugal force; a small part of the lubricating oil lubricates and cools the tooth surface through the oil passage 2 8 and flows out near the retaining ring 6. Due to the blocking effect of the retaining ring 6, the resistance of the oil passage 2 8 is relatively large. At the same time, the height difference between the inlet and outlet of the oil drain holes 11 ensures the oil drainage power of the oil passage 1 7. This oil passage structure can ensure that the main lubricating oil enters the oil passage 1 7 to lubricate and cool the main meshing heat generation area, effectively ensuring the safe and reliable operation of the entire coupling.

Claims

1. An efficient cooling structure of a toothed coupling, comprising a toothed shaft, an input end toothed ring, and an output end toothed ring. The toothed shaft is connected to the input end toothed ring and the output end toothed ring respectively through the meshing teeth on both sides, and the axial limit is achieved through a retaining ring. It is characterized in that: The tooth surfaces of the main meshing regions of the toothed shaft with the input end toothed ring and the output end toothed ring are respectively communicated with the bottom oil inlet holes at both ends of the toothed shaft, and the bottom oil inlet holes of the toothed shaft are communicated with the entire circumferential oil collecting groove arranged on the toothed shaft near the oil supply side, so that the lubricating oil passes through the bottom oil inlet holes of the toothed shaft from the oil collecting groove and enters the tooth surface of the main meshing region to form a main lubricating oil path; the bottom oil inlet holes at both ends of the toothed shaft are respectively communicated with the tooth surfaces of the non-meshing regions of the toothed shaft with the input end toothed ring and the output end toothed ring. A gap is left between the inner side surface of the toothed shaft and the retaining ring, so that the lubricating oil passes through the bottom oil inlet holes of the toothed shaft from the oil collecting groove, enters the tooth surface of the non-meshing region, and flows out near the retaining ring on the side surface of the toothed shaft to form an auxiliary lubricating oil path; drain holes are uniformly arranged in the middle of the input end toothed ring and the output end toothed ring respectively. The drain holes and the precision bolts are staggered and uniformly arranged, which can ensure that there is no blockage on the outlet side of the drain holes and the entire oil path is unobstructed; the inlet side of the drain hole is close to the end face of the toothed shaft, and the outlet side of the drain hole is located at the outer end face of the input end toothed ring and the output end toothed ring; the outlet of the drain hole is located at a position higher than the inlet, forming a certain height difference, which can provide sufficient centrifugal force for oil drainage; the inlet side of the oil inlet hole is located at the top of the oil collecting groove, and the outlet side of the oil inlet hole is located at the bottom of the tooth groove on the toothed shaft, which is at the position of 1 / 3 tooth width.

2. The efficient cooling structure of a toothed coupling according to claim 1, It is characterized in that: The input end toothed ring is connected to the input rotating shaft through precision bolts and nuts uniformly arranged in a circle; the output end toothed ring is connected to the output rotating shaft through precision bolts and nuts uniformly arranged in a circle.

3. The efficient cooling structure of a toothed coupling according to claim 1, It is characterized in that: An entire circumferential oil collecting groove is arranged on the toothed shaft near the oil supply side, and oil inlet holes are uniformly arranged between the bottom of each tooth groove of the toothed shaft and the oil collecting groove.

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