Heavy-duty mine truck impact-resistant pinion assembly

Abstract

The utility model discloses heavy load mine truck anti -impact tooth axle assembly relates to heavy load tooth axle assembly technical field, including center spline tooth axle, and the both ends of center spline tooth axle are fixedly installed through bearing seat, and the center of center spline tooth axle swing sleeve has main drive gear, and the both sides center of main drive gear all are set up and butt -joint buffer groove, the outer wall of center spline tooth axle swing sleeve has floating buffer tooth cover with the both ends of main drive gear, the outer wall of floating buffer tooth cover is provided with spiral tooth groove, when the great impact of main drive gear when receiving heavy load mine truck work, utilize the friction and disc spring group elastic compression absorption and buffer impact force of floating buffer tooth cover and butt -joint buffer groove, effectively reduced the direct action of impact force to center spline tooth axle, avoided the tooth axle fracture or deformation problem because of the impact of too big, significantly improved the anti -impact ability and life of tooth axle assembly.

Description

Technical Field

[0001] This utility model relates to the field of heavy-duty gear shaft assembly technology, specifically to a heavy-duty mining truck impact-resistant gear shaft assembly. Background Technology

[0002] Heavy-duty mining truck gear assemblies are key components in heavy-duty mining and transportation equipment, especially suitable for mining trucks operating in harsh conditions. These assemblies must withstand enormous impacts and heavy loads during use, thus placing extremely high demands on material selection, structural design, and manufacturing processes.

[0003] Existing gear-shaft connections primarily employ interference fits or keyway connections. With these connections, when equipment encounters impact loads during operation, these loads are directly transmitted to the gear meshing surfaces. Due to the excessive rigidity of the overall structure and the lack of sufficient elastic deformation capacity, the instantaneous impact energy cannot be effectively dissipated. This energy accumulation and concentrated transmission ultimately leads to severe damage problems such as tooth breakage and pitting in the gears, significantly impacting the normal operation and service life of the equipment. Therefore, we propose a heavy-duty mining truck impact-resistant gear-shaft assembly. Utility Model Content

[0004] The purpose of this invention is to address the problem that existing gear-shaft connections primarily use interference fits or keyway connections. With these connections, when equipment encounters impact loads during operation, these loads are directly transmitted to the gear meshing surface. Due to the excessive rigidity of the overall structure and the lack of sufficient elastic deformation capacity, the instantaneous impact energy cannot be effectively dissipated. This energy accumulation and concentrated transmission ultimately leads to serious damage problems such as tooth breakage and pitting in the gears, severely affecting the normal operation and service life of the equipment. This invention provides a heavy-duty mining truck impact-resistant gear-shaft assembly.

[0005] To achieve the above objectives, this utility model specifically adopts the following technical solution: A heavy-duty mining truck impact-resistant gear shaft assembly includes a central spline gear shaft. Both ends of the central spline gear shaft are fixedly mounted via bearing seats. A main drive gear is movably sleeved at the center of the central spline gear shaft, and both sides of the main drive gear have mating buffer grooves at their centers. Floating buffer sleeves are movably sleeved on the outer wall of the central spline gear shaft corresponding to both ends of the main drive gear. The outer wall of the floating buffer sleeves is provided with helical tooth grooves, and the inner wall of the mating buffer grooves is provided with helical convex teeth that mesh with the outer wall of the floating buffer sleeves. Limiting rings are fixedly connected to the outer ends of both sides of the floating buffer sleeves on the outer wall of the central spline gear shaft, and disc spring assemblies are movably sleeved between the limiting rings and the corresponding floating buffer sleeves on each side. The disc spring assemblies are in a pre-compressed state.

[0006] Furthermore, the spiral angle of the spiral groove on the outer wall of the floating buffer sleeve is 45±5°, and the groove depth H and the maximum compression of the disc spring H_max satisfy: H=1.2H_max, and the groove sidewall is coated with a wear-resistant copper-based coating.

[0007] Furthermore, the disc spring assembly comprises three mating disc springs, and the pre-compression of the disc spring assembly accounts for 30% to 50% of the maximum compression.

[0008] Furthermore, the inner cavity of the central spline gear shaft is hollow, and one end of the central spline gear shaft passes through the bearing seat and is fixedly connected to an oil supply hose through a rotary joint. The outer end of the oil supply hose is connected to the bottom of the oil pan. The main drive gear has gear oil supply channels corresponding to multiple protruding teeth, and the side wall of the central spline gear shaft has a gear shaft oil supply hole corresponding to the installation position of the main drive gear.

[0009] Furthermore, a check valve is fixedly connected between the oil supply hole of the central spline gear shaft and the rotary joint.

[0010] Furthermore, the floating buffer sleeve has an auxiliary cooling groove on its inward side.

[0011] The beneficial effects of this utility model are as follows: 1. This utility model utilizes a main drive gear and floating buffer sleeves. The main drive gear is fixed to the floating buffer sleeves on both sides through meshing buffer grooves. The floating buffer sleeves on both sides, secured by the preload pressure of the disc spring assembly, simultaneously buffer and protect the central spline gear shaft. When the main drive gear is subjected to the enormous impact force of a heavy-duty mining truck, the impact torque of the main drive gear is transmitted to the floating buffer sleeves through the helical grooves, converting into radial movement of the floating buffer sleeves. Under this force, the floating buffer sleeves compress the disc spring assembly. The friction between the floating buffer sleeves and the meshing buffer grooves, along with the elastic compression of the disc spring assembly, absorbs and buffers the impact force, effectively reducing the direct impact on the central spline gear shaft. This avoids gear shaft breakage or deformation due to excessive impact force, significantly improving the impact resistance and service life of the gear shaft assembly. Furthermore, the helical meshing design of the meshing buffer grooves and floating buffer sleeves not only enhances the stability of the gear shaft assembly during operation but also allows for better dispersion and absorption of impact force, further improving its overall performance.

[0012] 2. This utility model utilizes a specially designed oil delivery hose, gear oil delivery channel, and gear shaft oil delivery hole. The centrifugal force generated during the high-speed rotation of the main drive gear creates negative pressure at the gear shaft oil delivery hole, allowing lubricating oil to be delivered from the oil pan to the gear shaft oil delivery hole via the oil delivery hose. The lubricating oil then enters the gear oil delivery channel and is ejected, directly cooling the main drive gear and lubricating the contact surfaces of the main drive gear and the meshing gears. This achieves automatic lubrication of the gear shaft assembly, effectively reducing heat and wear caused by friction, and improving the operating efficiency and service life of the gear shaft assembly. Simultaneously, the hollow inner cavity design of the center spline gear shaft reduces the overall weight of the gear shaft assembly, which is beneficial for improving the load-bearing capacity and fuel economy of heavy-duty mining trucks.

[0013] 3. This utility model, through the inclusion of a check valve, prevents lubricating oil from flowing back into the oil pan when the gear assembly stops operating, ensuring sufficient lubrication of the gear assembly at startup. This reduces wear caused by dry friction during startup, further improving the reliability and service life of the gear assembly. Furthermore, the addition of the check valve enhances the lubrication system, ensuring directional flow of lubricating oil and improving lubrication efficiency. Attached Figure Description

[0014] Figure 1 This is a perspective view of the present invention; Figure 2 This is a front sectional view of the present invention; Figure 3 This is a side sectional view of the main drive gear of this utility model.

[0015] Reference numerals: 1. Center spline gear shaft; 2. Main drive gear; 3. Floating buffer sleeve; 4. Limiting retaining ring; 5. Disc spring assembly; 6. Gear shaft oil supply hole; 7. Gear oil supply channel; 8. Bearing housing; 9. Rotary joint; 10. Oil supply hose; 11. Check valve; 12. Auxiliary cooling tank; 13. Connecting buffer tank. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0017] Please see Figure 1 - Figure 3This utility model provides a heavy-duty mining truck impact-resistant gear shaft assembly, including a central spline gear shaft 1. The two ends of the central spline gear shaft 1 are fixedly installed through bearing seats 8. A main drive gear 2 is movably sleeved at the center of the central spline gear shaft 1, and a docking buffer groove 13 is opened at the center of both sides of the main drive gear 2. A floating buffer sleeve 3 is movably sleeved on the outer wall of the central spline gear shaft 1 corresponding to the two ends of the main drive gear 2. The outer wall of the floating buffer sleeve 3 is provided with a helical tooth groove, and the inner wall of the docking buffer groove 13 is provided with a helical convex tooth that meshes with the outer wall of the floating buffer sleeve 3. A limit stop ring 4 is fixedly connected to the outer end of the floating buffer sleeve 3 on both sides of the outer wall of the central spline gear shaft 1, and a disc spring assembly 5 is movably sleeved between the limit stop ring 4 and the corresponding floating buffer sleeve 3 on both sides. The disc spring assembly 5 is in a pre-compressed state.

[0018] The working principle and usage process of this utility model are as follows: In use, the main drive gear 2 and the floating buffer sleeve 3 are configured. The two sides of the main drive gear 2 are fixed to the floating buffer sleeve 3 by meshing with the buffer groove 13. The floating buffer sleeve 3 on both sides is fixed to the main drive gear 2 by the pre-tightening pressure of the disc spring assembly 5, while realizing the buffer protection of the central spline gear shaft 1. When the main drive gear 2 is subjected to the huge impact force when the heavy-duty mining truck is working, the impact torque of the main drive gear 2 is transmitted to the floating buffer sleeve 3 through the helical groove, which is converted into the radial movement of the floating buffer sleeve 3. After being subjected to force, the floating buffer sleeve 3 squeezes the disc spring assembly 5. The friction between the floating buffer sleeve 3 and the buffer groove 13 and the elastic compression of the disc spring assembly 5 are used to absorb and buffer the impact force, effectively reducing the direct effect of the impact force on the central spline gear shaft 1, avoiding the problem of gear shaft breakage or deformation caused by excessive impact force, and significantly improving the impact resistance and service life of the gear shaft assembly. Meanwhile, the helical meshing design of the docking buffer groove 13 and the floating buffer tooth sleeve 3 not only enhances the stability of the gear shaft assembly during operation, but also enables the gear shaft assembly to better disperse and absorb impact force when subjected to impact, further improving its overall performance.

[0019] In this embodiment, preferably, the helix angle of the spiral groove on the outer wall of the floating buffer sleeve 3 is 45±5°, and the groove depth H and the maximum compression of the disc spring H_max satisfy: H=1.2H_max, and the groove sidewall is coated with a wear-resistant copper-based coating. By setting the spiral angle of the spiral groove and the matching relationship between the groove depth and the maximum compression of the disc spring, the floating buffer sleeve 3 can better mesh with the mating buffer groove 13 and generate radial movement when subjected to impact force. At the same time, the wear-resistant copper-based coating improves the wear resistance of the groove sidewall and extends the service life of the floating buffer sleeve 3.

[0020] In this embodiment, preferably, the disc spring assembly 5 comprises three mating disc springs, and the pre-compression of the disc spring assembly 5 accounts for 30% to 50% of the maximum compression. The pre-compression of the disc spring assembly 5 accounts for 30% to 50% of the maximum compression, ensuring that the disc spring assembly 5 can fully exert its elastic compression effect when subjected to impact force, effectively absorbing and buffering the impact force.

[0021] In this embodiment, preferably, the inner cavity of the central spline gear shaft 1 is hollow, and one end of the central spline gear shaft 1 passes through the bearing housing 8 and is fixedly connected to an oil supply hose 10 via a rotary joint 9. The outer end of the oil supply hose 10 is connected to the bottom of the oil pan. The main drive gear 2 has gear oil supply channels 7 corresponding to multiple protruding teeth, and the side wall of the central spline gear shaft 1 has a gear shaft oil supply hole 6 corresponding to the installation position of the main drive gear 2. Through the oil supply hose 10, gear oil supply channels 7 and gear shaft oil supply hole 6, the centrifugal force when the main drive gear 2 rotates at high speed generates a negative pressure at the gear shaft oil supply hole 6, thereby delivering lubricating oil from the oil pan to the gear shaft oil supply hole 6 through the oil supply hose 10, and then entering the gear oil supply channel 7 and being thrown out to directly cool the main drive gear 2, and lubricate the contact surface between the main drive gear 2 and the meshing gear, realizing automatic lubrication of the gear shaft assembly, effectively reducing the heat and wear generated by friction, and improving the operating efficiency and service life of the gear shaft assembly. Meanwhile, the hollow design of the inner cavity of the center spline gear shaft 1 reduces the overall weight of the gear shaft assembly, which is beneficial to improving the load-bearing capacity and fuel economy of heavy-duty mining trucks.

[0022] In this embodiment, preferably, a check valve 11 is fixedly connected between the inner cavity of the center spline gear shaft 1 and the oil supply hole 6 of the gear shaft and the rotary joint 9. The check valve 11 prevents lubricating oil from flowing back into the oil pan when the gear shaft assembly stops operating, ensuring sufficient lubrication of the gear shaft assembly at startup, reducing wear caused by dry friction during startup, and further improving the reliability and service life of the gear shaft assembly. Furthermore, the addition of the check valve 11 makes the lubrication system more complete, ensuring the directional flow of lubricating oil and improving lubrication efficiency.

[0023] In this embodiment, preferably, the floating buffer sleeve 3 has an auxiliary cooling groove 12 on the inward side; the auxiliary cooling groove 12 increases the contact area between the floating buffer sleeve 3 and the lubricating oil. When the main drive gear 2 rotates at high speed, the lubricating oil can enter the auxiliary cooling groove 12 and carry away the heat generated by friction of the floating buffer sleeve 3, further improving the heat dissipation efficiency of the gear shaft assembly and ensuring the stable operation of the gear shaft assembly in a high-temperature environment.

[0024] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. Heavy-duty mining truck impact-resistant gear shaft assembly, characterized in that: The device includes a central spline gear shaft (1), with both ends of the central spline gear shaft (1) fixedly installed by bearing seats (8). A main drive gear (2) is movably sleeved at the center of the central spline gear shaft (1), and a docking buffer groove (13) is provided at the center of both sides of the main drive gear (2). A floating buffer sleeve (3) is movably sleeved on the outer wall of the central spline gear shaft (1) corresponding to both ends of the main drive gear (2). The outer wall of the floating buffer sleeve (3) is provided with a helical tooth groove, and the inner wall of the docking buffer groove (13) is provided with a helical convex tooth that meshes with the outer wall of the floating buffer sleeve (3). A limit stop ring (4) is fixedly connected to the outer end of the floating buffer sleeve (3) on both sides of the outer wall of the central spline gear shaft (1), and a disc spring assembly (5) is movably sleeved between the limit stop ring (4) and the corresponding floating buffer sleeve (3) on one side. The disc spring assembly (5) is in a pre-compressed state.

2. The heavy-duty mining truck impact-resistant gear shaft assembly according to claim 1, characterized in that: The spiral angle of the spiral groove on the outer wall of the floating buffer sleeve (3) is 45±5°, and the groove depth H and the maximum compression amount H_max of the disc spring satisfy: H=1.2H_max, and the groove sidewall is coated with a wear-resistant copper-based coating.

3. The heavy-duty mining truck impact-resistant gear shaft assembly according to claim 1, characterized in that: The disc spring assembly (5) comprises three mating disc springs, and the pre-compression of the disc spring assembly (5) accounts for 30% to 50% of the maximum compression.

4. The heavy-duty mining truck impact-resistant gear shaft assembly according to claim 1, characterized in that: The inner cavity of the central spline gear shaft (1) is hollow, and one end of the central spline gear shaft (1) passes through the bearing seat (8) and is fixedly connected to the oil supply hose (10) through the rotary joint (9). The outer end of the oil supply hose (10) is connected to the bottom of the oil pan. The main drive gear (2) has gear oil supply channels (7) corresponding to multiple protruding teeth, and the side wall of the central spline gear shaft (1) has a gear shaft oil supply hole (6) corresponding to the installation position of the main drive gear (2).

5. The heavy-duty mining truck impact-resistant gear shaft assembly according to claim 4, characterized in that: A check valve (11) is fixedly connected between the inner cavity of the central spline gear shaft (1) and the gear shaft oil supply hole (6) and the rotary joint (9).

6. The heavy-duty mining truck impact-resistant gear shaft assembly according to claim 1, characterized in that: The floating buffer sleeve (3) has an auxiliary cooling groove (12) on the inward side.

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