Self-lubricating mechanism for high-speed rotating floating parts

Abstract

The application relates to the field of mechanical part lubrication, and particularly discloses a self-lubricating mechanism for high-speed rotating floating parts, which comprises a connecting shaft and a floating part, the floating part is provided with an external spline, the connecting shaft is provided with a mounting hole for mounting the external spline and the floating part, an internal spline matched with the external spline is fixedly arranged in the mounting hole of the connecting shaft, the floating part is internally provided with a central hole for passing oil mist, one end of the central hole is coplanar with the surface of the floating part, the other end of the central hole extends to the external spline, the floating part is provided with a plurality of air inlet holes communicating with the mounting hole and the central hole, and the side wall of the connecting shaft is provided with a plurality of air outlet holes communicating with the mounting hole. In the scheme, when the connecting shaft is driven by the floating part to rotate at high speed, the oil mist in the connecting shaft is subjected to high centrifugal force, so that high negative pressure is generated in the air inlet hole and the central hole, the oil mist enters the mounting hole through the air inlet hole, and self-lubrication is realized at the connecting shaft, the floating part, the external spline and the internal spline.

Description

Technical Field

[0001] The invention relates to the technical field of lubrication of mechanical parts, in particular to a self-lubricating mechanism for high-speed rotating floating parts. Background Art

[0002] When designing the connection structure between floating parts, the components are generally connected through splines. Since the splines and components will rotate or float at high speed, and the friction between the splines and components is large, a lubrication structure is generally designed between the splines and components. If the lubrication and cooling design is improper, the spline area will cause heat and wear, and eventually lead to spline damage.

[0003] Conventional lubrication structures generally introduce lubricating oil spray lines, nozzles and oil drain channels to lubricate the required lubrication points. In this method, more grease is used for lubrication, and the grease between the spline and the component is mostly liquid, which will occupy a larger fitting space between the spline and the component. This lubrication mode is suitable for floating parts that rotate at low speeds, but when the spline and the floating component rotate at a relatively high speed, the liquid grease will increase the load between the floating parts, and the liquid grease will reduce the floating ability of the fitting. Summary of the Invention

[0004] In response to the deficiencies in the prior art, the present invention provides a self-lubricating mechanism for high-speed rotating floating parts to solve the problem that conventional liquid grease lubrication increases the load between the floating parts and the splines and reduces the suspension performance between high-speed rotating floating parts.

[0005] In order to achieve the above-mentioned purpose, the basic scheme of the present invention is as follows: a self-lubricating mechanism of a high-speed rotating floating part, comprising a connecting shaft and a floating part, an external spline is provided on one end of the floating part, a mounting hole is provided on the connecting shaft for detachable mounting of the external spline and the end of the floating part and the connecting shaft, an internal spline that cooperates with the external spline is fixedly provided in the mounting hole of the connecting shaft, a center hole for oil mist to pass through is provided in the floating part, one end of the center hole is coplanar with the surface of the floating part, and the other end of the center hole extends to the external spline, a plurality of air inlet holes connecting the mounting hole and the center hole are provided on the floating part, and a plurality of air discharge holes connected to the mounting hole are provided on the side wall of the connecting shaft.

[0006] The technical principle of the present invention is: when the self-lubricating mechanism of the high-speed rotating floating part is used, the gear on the floating part drives the connecting shaft to rotate through the external spline and the internal spline, and the connecting shaft can drive other mechanical parts to rotate at high speed; in this process, when the connecting shaft rotates at high speed driven by the floating part, the oil mist in the connecting shaft will be subjected to a higher centrifugal force, causing the oil mist in the mounting hole to flow toward the air bleed hole, thereby causing a larger negative pressure to be generated in the air inlet hole and the center hole. At this time, the center hole also has a higher negative pressure, causing the air containing oil mist to flow from the center hole to the connecting shaft; at this time, the oil mist enters the mounting hole through the air inlet hole, self-lubricating the connecting shaft and the floating part, and at the same time self-lubricating the external spline and the internal spline; after lubrication, the airflow formed by the oil mist is discharged through the air bleed hole. In this process, the flowing airflow and oil mist can also cool the external spline and the internal spline, playing a role of cooling and lubrication.

[0007] Furthermore, an elastic sealing ring is detachably mounted on the side wall of the floating part, the elastic sealing ring abuts against the inner wall of the connecting shaft mounting hole, and the elastic sealing ring is located at one end of the connecting shaft away from the bottom of the mounting hole.

[0008] Through the above-mentioned arrangement, after the installation of the floating part and the rotating shaft is completed, the elastic sealing ring can be offset against the inner wall of the mounting hole of the connecting shaft, so that a relatively closed space is formed between the elastic sealing ring, the inner wall of the mounting hole and the outer wall of the floating part, which facilitates the air flow containing oil mist to impact the external splines and the internal splines, and has a stronger lubrication and cooling effect on the external splines and the internal splines; at the same time, the elastic sealing ring can create a reasonable gap between the floating part and the connecting shaft, thereby limiting the floating between the floating part and the connecting shaft.

[0009] Furthermore, a circlip is detachably mounted on the side wall of the floating part, the circlip abuts against the inner wall of the connecting shaft mounting hole, the circlip is located at one end of the connecting shaft near the bottom of the mounting hole, and the external spline is located between the elastic sealing ring and the circlip.

[0010] Through the above setting, the elastic retaining ring can cooperate with the elastic sealing ring to make the floating limit between the floating part and the connecting shaft more stable; at the same time, the external spline is restricted between the elastic sealing ring and the elastic retaining ring, ensuring that the oil mist and airflow flowing out of the air inlet hole can act on the external spline and the internal spline, ensuring that the external spline and the internal spline are cooled and lubricated.

[0011] Furthermore, the air inlet hole is located on one end of the floating part close to the bottom of the mounting hole, and the air discharge hole is located on one end of the connecting shaft away from the bottom of the mounting hole.

[0012] Through the above arrangement, the airflow containing oil mist can be effectively controlled to first flow to the bottom of the mounting hole, then flow back to the end of the connecting shaft away from the bottom of the mounting hole, and then be discharged from the air vent hole, so that the airflow containing oil mist can fully contact the inner wall of the mounting hole and the outer wall of the floating part, thereby achieving full utilization of the oil mist and airflow.

[0013] Furthermore, the air leakage hole is located between the elastic sealing ring and the elastic retaining ring.

[0014] Through the above arrangement, it is ensured that the airflow flows out stably from the air leakage hole, and the air leakage hole can guide the airflow direction together with the central hole and the air inlet hole.

[0015] Furthermore, the plurality of air inlet holes are all located at the bottom of the tooth profile of the external spline.

[0016] Through the above-mentioned arrangement, it is ensured that the airflow and oil mist entering the mounting hole from the air inlet hole fully act on the external spline and the internal spline, thereby cooling and lubricating the external spline and the internal spline; at the same time, by restricting the position of the air inlet hole, it is ensured that the tooth top of the external spline maintains its original strength, and it is also ensured that the oil mist and airflow accurately enter the mounting hole.

[0017] Furthermore, a gear is provided on one end of the floating part away from the external spline. The gear is coaxially arranged with the center hole, and the end face of the center hole is coplanar with the end face of the gear.

[0018] Through the above arrangement, when the gear rotates at high speed, the power can be transmitted to the connecting shaft through the floating parts to transfer torque. The oil mist in the connecting shaft will be subjected to a high centrifugal force. At this time, the center hole can automatically suck in the airflow and oil mist, thereby achieving self-lubrication between the connecting shaft and the floating parts.

[0019] Furthermore, a coaxial sleeve is provided on the outer wall of the connecting shaft and several bearings are installed. The bearings include an inner ring, a rolling body and an outer ring from the inside to the outside. The inner ring is fixedly connected to the outer wall of the connecting shaft.

[0020] Through the above arrangement, the bearing can provide support for the connection between the connecting shaft and other mechanical parts, and also facilitates the corresponding rotation of the connecting shaft driven by the floating parts.

[0021] Furthermore, the plurality of air inlet holes are staggered along the axial direction of the central hole.

[0022] Through the above-mentioned setting, the arrangement of the air inlet holes can be made more uniform, and the flow range of the oil mist and air flow can be made more uniform.

[0023] Furthermore, the directions of the air inlet holes at the external splines are all different.

[0024] Through the above arrangement, the distribution of the plurality of air inlet holes in the circumferential direction can be made more uniform, further improving the uniformity of the oil mist and air flow; at the same time, the strength reduction effect of the external spline caused by the arrangement of the air inlet can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a cross-sectional view in the main viewing direction of a self-lubricating mechanism of a high-speed rotating floating part in Example 1 of the present invention.

[0026] Figure 2 This is a diagram from the main view direction of a self-lubricating mechanism of a high-speed rotating floating part in Example 2 of the present invention.

[0027] In the above drawings: floating part 10, gear 101, external spline 102, center hole 103, air inlet 104, first engaging groove 105, second engaging groove 106, elastic sealing ring 107, elastic retaining ring 108, connecting shaft 20, internal spline 201, air bleed hole 202, mounting hole 203, connecting hole 204, cover 205, bearing 30, recovery shell 40, oil absorption layer 401, ridge 402, recovery hole 403, air outlet 404, mounting groove 405. DETAILED DESCRIPTION

[0028] The technical solution of the present invention is further described below with reference to the accompanying drawings and embodiments.

[0029] Example 1

[0030] This embodiment is basically as Figure 1 As shown, an embodiment of the present invention proposes a self-lubricating mechanism for a high-speed rotating floating part, including a connecting shaft 20 and a floating part 10, wherein an external spline 102 is integrally formed on the right end of the floating part 10, and a gear 101 is integrally formed on the left end of the floating part 10; a mounting hole 203 is provided on the connecting shaft 20 for detachable mounting of the external spline 102 and the end of the floating part 10 to the connecting shaft 20, and an internal spline 201 meshing with the external spline 102 is integrally formed in the mounting hole 203 of the connecting shaft 20.

[0031] like Figure 1As shown, a center hole 103 is provided in the floating part 10 for oil mist to pass through, and the left end of the center hole 103 coaxially passes through the gear 101, and the right end of the center hole 103 extends to the external spline 102, and the right end of the floating part 10 is in a closed state; the floating part 10 is provided with two air inlet holes 104 connecting the mounting hole 203 and the center hole 103, and the side wall of the connecting shaft 20 is provided with two air leakage holes 202 connected to the mounting holes 203; the air inlet hole 104 is located on the right end of the floating part 10, and the air leakage hole 202 is located on the left end of the connecting shaft 20; at the same time, the two air inlet holes 104 are both located at the bottom of the tooth profile of the external spline 102, and several air inlet holes 104 are staggered along the axial direction of the center hole 103, and the directions of the air inlet holes 104 at the external spline 102 are all different.

[0032] like Figure 1 As shown, a first engaging groove 105 and a second engaging groove 106 are coaxially provided on the outer wall of the floating part 10. The first engaging groove 105 is located on the left end of the floating part 10, and the second engaging groove 106 is located on the right end of the floating part 10. An elastic sealing ring 107 is coaxially tensioned and installed at the first engaging groove 105 of the floating part 10; an elastic circlip 108 is coaxially tensioned and installed at the second engaging groove 106 of the floating part 10. The external spline 102 is located between the elastic sealing ring 107 and the elastic circlip 108. The elastic circlip 108 and the elastic sealing ring 107 are both against the inner wall of the mounting hole 203 of the connecting shaft 20; the air vent 202 and the air inlet 10 4 are located between the elastic sealing ring 107 and the elastic circlip 108; at the same time, a connecting hole 204 connected to the mounting hole 203 is coaxially provided on the right end of the connecting shaft 20, and a cover 205 is installed at the connecting hole 204 by welding or bolt sealing, so that when the elastic circlip 108 at the right end of the floating part 10 is installed, the connecting hole 204 is in an open state. After the elastic circlip 108 is inserted into the second engaging groove 106 through the connecting hole 204, the elastic circlip 108 abuts against the right end of the internal spline 201, and the cover 205 blocks the connecting hole 204 and connects the cover 205 to the connecting shaft 20 by welding or bolting.

[0033] In addition, two bearings 30 are coaxially sleeved and installed on the outer wall of the connecting shaft 20. The bearing 30 includes an inner ring, a rolling element and an outer ring from the inside to the outside. The inner ring is welded to the outer wall of the connecting shaft 20, and the outer ring is welded to other mechanical parts or the frame.

[0034] In the present embodiment, a self-lubricating mechanism of a high-speed rotating floating part transmits high-speed torque through the gear 101 when in use. At this time, the gear 101 drives the end of the floating part 10 into the mounting hole 203, and drives the connecting shaft 20 to rotate through the external spline 102 and the internal spline 201. The connecting shaft 20 drives the inner ring of the bearing 30 to rotate relative to the outer ring of the bearing 30. During this process, due to the provision of the elastic retaining ring 108 and the elastic sealing ring 107, a stable connection between the floating part 10 and the connecting shaft 20 is maintained, and a reasonable gap is maintained between the floating part 10 and the connecting shaft 20. The gap forms a relatively closed space, which facilitates the floating connection between the floating part 10 and the connecting shaft 20.

[0035] When the gear 101 rotates at a high speed, the oil mist in the connecting shaft 20 will be subjected to a high centrifugal force, causing the oil mist in the mounting hole 203 to flow toward the air bleed hole 202, thereby generating a large negative pressure in the air inlet hole 104 and the center hole 103. At this time, the left end of the center hole 103 also has a high negative pressure, causing the air containing oil mist to flow from the left end of the center hole 103 to the external spline 102 at the right end of the center hole 103. At this time, the air inlet hole 104 at the external spline 102 can guide the oil mist out, allowing the oil mist to enter the mounting hole 203, and the oil mist is located between the connecting shaft 20, the floating part 10, the elastic retaining ring 108 and the elastic sealing ring 107, lubricating the connecting shaft 20 and the floating part 10. At the same time, the oil mist lubricates and cools the connection between the external spline 102 and the internal spline 201. After cooling and lubrication, it flows to the left and is discharged from the air bleed hole 202, so as to achieve sufficient lubrication between the connecting shaft 20 and the floating part 10.

[0036] Through the high-speed rotation of the center hole 103, the air inlet hole 104, the connecting hole and the air discharge hole 202 with the floating part 10 in the above process, the oil mist can automatically flow from the center hole 103 to the air inlet hole 104 and the connecting hole, thereby realizing self-lubrication of the connection between the external spline 102, the internal spline 201, the connecting shaft 20 and the floating part 10, and the lubrication is convenient and fast; the oil mist can also automatically and continuously cool and lubricate the connection between the external spline 102 and the internal spline 201, thereby improving the service life of the external spline 102 and the internal spline 201; at the same time, it can ensure that the floating part 10 and the connecting shaft 20 maintain a stronger floating performance.

[0037] Example 2

[0038] The difference between Example 2 and Example 1 is as follows: Figure 2As shown, it also includes an oil mist recovery unit, which includes an annular recovery shell 40 and several oil absorption layers 401 located in the recovery shell 40. The recovery shell 40 is coaxially arranged at the air leakage hole 202 of the connecting shaft 20. Two annular ridges 402 are integrally formed on the side of the recovery shell 40 close to the connecting shaft 20. The ridges 402 are coaxially arranged with the recovery shell 40. A recovery hole 403 connected to the air leakage hole 202 is provided between the two ridges 402 of the recovery shell 40. An air outlet hole 404 connected to the recovery shell 40 is provided on the side of the recovery shell 40 away from the recovery hole 403. The oil absorption layer 401 is installed in the recovery shell 40 and is located between the recovery hole 403 and the air outlet hole 404; the width of the air outlet hole 404 is greater than the width of the recovery hole 403.

[0039] In addition, the longitudinal section of the protrusion 402 is L-shaped, and a mounting groove 405 for the protrusion 402 to be embedded in is provided on the outer wall of the connecting shaft 20.

[0040] When a self-lubricating mechanism of a high-speed rotating floating part in this embodiment is in use, when the oil mist forms an air flow and flows out from the air leakage hole 202, the oil mist enters the recovery shell 40 through the air leakage hole 202 and the recovery hole 403. The oil absorption layer 401 in the recovery shell 40 can absorb the oil mist in the air flow, so that the air is discharged from the air outlet 404, so that the lubricating oil content in the discharged air is reduced, which can reduce the impact of the lubricating oil on the environment; at the same time, the lubricating oil sucked into the oil absorption layer 401 can be recovered.

[0041] In the above process, the ridge 402 on the recovery shell 40 can be stably connected to the mounting groove 405 of the connecting shaft 20, can adapt to the high rotation of the floating part 10 and the connecting shaft 20, and can stably recover the lubricating oil.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not limiting. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the purpose and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A self-lubricating mechanism for a high-speed rotating floating part, comprising a connecting shaft and a floating part, wherein an external spline is provided on one end of the floating part, a mounting hole is provided on the connecting shaft for detachable mounting of the external spline and the end of the floating part to the connecting shaft, and an internal spline is fixedly provided in the mounting hole of the connecting shaft to cooperate with the external spline, characterized in that: The floating part is provided with a central hole for oil mist to pass through, one end of the central hole is coplanar with the surface of the floating part, and the other end of the central hole extends to the external spline. The floating part is provided with a plurality of air inlet holes connecting the mounting hole and the central hole, and the side wall of the connecting shaft is provided with a plurality of air discharge holes connected to the mounting hole. The plurality of air inlet holes are all located at the bottom of the tooth profile of the external spline; The outer wall of the connecting shaft is provided with a coaxial sleeve and a plurality of bearings are installed. The bearings include an inner ring, a rolling element and an outer ring from the inside to the outside. The inner ring is fixedly connected to the outer wall of the connecting shaft. The oil mist recovery unit is also included. The oil mist recovery unit includes an annular recovery shell and a plurality of oil absorption layers located in the recovery shell. The recovery shell is coaxially arranged at the air leakage hole of the connecting shaft. Two annular convex strips are integrally formed on the side of the recovery shell close to the connecting shaft. The convex strips are coaxially arranged with the recovery shell. A recovery hole connected to the air leakage hole is provided between the two convex strips of the recovery shell. An air outlet hole connected to the recovery shell is provided on the side of the recovery shell away from the recovery hole. The oil absorption layer is installed in the recovery shell and is located between the recovery hole and the air outlet hole. The width of the air outlet hole is greater than the width of the recovery hole. A first engaging groove and a second engaging groove are coaxially arranged on the outer wall of the floating part. The first engaging groove is located on the left end of the floating part, and the second engaging groove is located on the right end of the floating part. An elastic sealing ring is coaxially tensioned and installed at the first engaging groove of the floating part; an elastic retaining ring is coaxially tensioned and installed at the second engaging groove of the floating part, and the external spline is located between the elastic sealing ring and the elastic retaining ring, and the elastic retaining ring and the elastic sealing ring are both against the inner wall of the connecting shaft mounting hole; the air vent and the air inlet are both located between the elastic sealing ring and the elastic retaining ring.

2. A self-lubricating mechanism for high-speed rotating floating parts according to claim 1, characterized in that: A gear is provided on one end of the floating part away from the external spline. The gear is coaxially arranged with the center hole, and the end face of the center hole is coplanar with the end face of the gear.

3. A self-lubricating mechanism for a high-speed rotating floating part according to claim 1 or 2, characterized in that: The plurality of air inlet holes are staggered along the axial direction of the central hole.

4. A self-lubricating mechanism for a high-speed rotating floating part as claimed in claim 3, characterized in that: The directions of the air inlet holes at the external splines are all different.

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