A low-noise helical gear structure for a handling loader

Abstract

This utility model discloses a low-noise helical gear structure for a handling loader, relating to the field of helical gear technology. It includes a driven large gear and a driving small gear, which mesh with each other. An installation groove is formed between adjacent teeth of the driven large gear, and a buffer pad is fixedly connected within the groove. An oil outlet hole is formed at the upper end of the buffer pad near the center of the driven large gear. When the driving small gear meshes and rotates with the driven large gear, the tooth surface of the driving small gear contacts the outer side of the buffer pad for cushioning, significantly reducing meshing impact and tooth surface friction. Furthermore, during meshing, some lubricating oil is dispersed between the meshing teeth through a one-way communication mechanism, ensuring normal operation of the gear structure and low-noise performance. Combining multiple functions of cushioning, lubrication, and sealing, this significantly reduces the noise level of the handling loader during operation and improves the service life and transmission efficiency of the gear structure.

Description

Technical Field

[0001] This utility model relates to the field of helical gear technology, specifically to a low-noise helical gear structure for a handling loader. Background Technology

[0002] Spiral bevel gears are widely used in the drive axles and central transmission systems of heavy equipment such as loaders and handling machines because of their smooth transmission and high load-bearing capacity.

[0003] However, existing helical gear structures still face significant challenges under high-speed, heavy-load conditions. The noise generated by gear transmission mainly originates from meshing impact and tooth surface friction. Especially during loader operation, the high-frequency howling noise can significantly exceed the allowable range of the working environment. Furthermore, when the gear rotates at high speed, the lubricating oil in the tooth gaps is easily displaced under centrifugal force, leading to insufficient lubrication, accelerated tooth surface wear, and consequently increased noise and shortened service life. To address these issues, we propose a low-noise helical gear structure for handling loaders. Summary of the Invention

[0004] The purpose of this utility model is to solve the problem that the noise generated by gear transmission mainly comes from meshing impact and tooth surface friction. Especially when the loader is operating, its high-frequency howling noise can significantly exceed the allowable range of the working environment. Furthermore, when the gear rotates at high speed, the lubricating oil in the tooth gap is easily displaced under the action of centrifugal force, resulting in insufficient lubrication, aggravating tooth surface wear, and thus increasing noise and shortening service life. Therefore, this utility model provides a low-noise helical gear structure for handling loaders.

[0005] To solve the above problems, this utility model adopts the following technical solution: A low-noise helical gear structure for a handling loader includes a driven large gear and a driving small gear, which mesh with each other. An installation groove is formed between adjacent teeth of the driven large gear, and a buffer pad is fixedly connected within the installation groove. An oil outlet hole is formed at the upper end of the buffer pad near the center of the driven large gear, and multiple elastic rubber sheets are evenly distributed at the bottom of the inner wall of the buffer pad. The inner ends of the elastic rubber sheets are inclined towards the center of the driven large gear. An oil storage chassis is provided at the bottom of the driven large gear, and the bottom of the installation groove near the outer ring of the driven large gear is connected to the bottom of the oil storage chassis via a one-way communication mechanism.

[0006] Furthermore, the one-way communication mechanism includes a one-way oil supply pipe, which passes through the bottom of the mounting groove and is positioned near the outer ring of the driven large gear, facing the inner cavity of the oil storage chassis. A valve-type one-way oil supply valve is provided at the top of the one-way oil supply pipe, and an oil suction hole is provided at the bottom of the side wall of the one-way oil supply pipe.

[0007] Furthermore, the buffer pad is a wear-resistant rubber pad, and a compression groove is provided in the center of the inner side of the buffer pad. Multiple elastic rubber sheets are installed on the inner wall of the compression groove of the buffer pad, and the elastic rubber sheets are elastic rubber pads.

[0008] Furthermore, a sealing rubber pad is fixedly connected to the bottom of the mounting groove.

[0009] Furthermore, the upper inner edge of the oil storage chassis is open, and the bottom of the inner cavity of the oil storage chassis is filled with an oil-absorbing sponge.

[0010] Furthermore, a capillary oil reservoir is formed at the center of the outer side of the protruding tooth of the active pinion.

[0011] The beneficial effects of this utility model are as follows: When the driving pinion and driven gear mesh and rotate, the tooth surface of the driving pinion contacts the outer side of the buffer pad, significantly reducing meshing impact and tooth surface friction. During meshing, some lubricating oil is delivered from the oil storage chassis to the mounting groove via a one-way communication mechanism, specifically a one-way oil supply pipe and a diaphragm one-way oil supply valve. The lubricating oil entering the mounting groove passes through multiple elastic rubber sheets when the buffer pad is compressed, and is then squeezed out from the oil outlet, distributing lubrication between the meshing teeth. This ensures normal operation of the gear structure and low noise. The elastic deformation of the multiple elastic rubber sheets provides uniform elastic support when the buffer pad is compressed. Simultaneously, the inclined design of the elastic rubber sheets helps guide the lubricating oil towards the oil outlet, providing a one-way oil delivery effect. Combining multiple functions of buffering, lubrication, and sealing, this significantly reduces the noise level of the loader during operation and improves the service life and transmission efficiency of the gear structure.

[0012] The opening on the upper inner edge of the oil storage tray of this utility model can guide the lubricating oil splashed into the inner side of the oil storage tray from the gearbox into the oil storage tray for storage. The oil-absorbing sponge inside the oil storage tray can continuously absorb and store the lubricating oil, ensuring that even when the gear is rotating at high speed and the centrifugal force is strong, the lubricating oil can be replenished in time through the one-way oil supply pipe and the valve one-way oil supply valve to avoid insufficient lubrication, and also adsorb and filter the lubricating oil.

[0013] The capillary oil reservoir at the center of the outer side of the active pinion tooth of this invention can assist in the dispersion of lubricating oil when it is squeezed out at the oil outlet, and store a small amount of lubricating oil during gear rotation, thereby extending the lubrication time and reducing tooth surface wear and noise generation. Attached Figure Description

[0014] Figure 1 This is a perspective view of the present invention; Figure 2 This is a side sectional view of the present invention; Figure 3 This is a utility model Figure 2 Enlarged view of point A in the middle.

[0015] In the diagram: 1. Driven large gear; 2. Driven small gear; 3. Buffer pad; 4. Mounting groove; 5. Oil storage chassis; 6. One-way oil supply pipe; 7. Oil suction hole; 8. Valve one-way oil supply valve; 9. Elastic rubber sheet; 10. Oil outlet hole; 11. Capillary oil storage tank; 12. Oil-absorbing sponge. 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 Figures 1-3 This utility model provides a low-noise helical gear structure for a handling loader, including a driven large gear 1 and a driving small gear 2. The driven large gear 1 and the driving small gear 2 mesh with each other. An installation groove 4 is provided between adjacent teeth of the driven large gear 1, and a buffer pad 3 is fixedly connected in the installation groove 4. An oil outlet hole 10 is provided at the upper end of the buffer pad 3 near the center of the driven large gear 1, and multiple elastic rubber sheets 9 are evenly distributed at the bottom of the inner wall of the buffer pad 3. The inner end of the elastic rubber sheet 9 is inclined towards the center of the driven large gear 1. An oil storage chassis 5 is provided at the bottom of the driven large gear 1, and the bottom of the groove 4 near the outer ring of the driven large gear 1 is connected to the bottom of the oil storage chassis 5 through a one-way communication mechanism.

[0018] During operation, when the driving pinion 2 and the driven gear 1 mesh and rotate, the tooth surface of the driving pinion 2 contacts the outer side of the buffer pad 3 for cushioning, significantly reducing meshing impact and tooth surface friction. Furthermore, during meshing, some lubricating oil is transported from the oil storage chassis 5 to the mounting groove 4 through a one-way communication mechanism, specifically a one-way oil supply pipe 6 and a diaphragm one-way oil supply valve 8. The lubricating oil entering the mounting groove 4 passes through multiple elastic rubber sheets 9 sequentially when the buffer pad 3 is compressed, and then is squeezed out from the oil outlet 10, distributing lubrication between the meshing teeth. This ensures normal operation of the gear structure and low noise performance. The elastic deformation of the multiple elastic rubber sheets 9 provides uniform elastic support when the buffer pad 3 is compressed. Simultaneously, the inclined arrangement of the elastic rubber sheets 9 helps guide the lubricating oil towards the oil outlet 10, providing a one-way oil delivery effect. Combining multiple functions of cushioning, lubrication, and sealing, this significantly reduces the noise level of the loader during operation and improves the service life and transmission efficiency of the gear structure.

[0019] In this embodiment, preferably, the one-way communication mechanism includes a one-way oil supply pipe 6. The one-way oil supply pipe 6 passes through the bottom of the mounting groove 4, near the bottom of the outer ring of the driven large gear 1, and faces the inner cavity of the oil storage chassis 5. A diaphragm one-way oil supply valve 8 is provided at the top of the one-way oil supply pipe 6, and an oil suction hole 7 is provided at the bottom of the side wall of the one-way oil supply pipe 6. Through the one-way communication mechanism, it is ensured that the lubricating oil can only be delivered from the oil storage chassis 5 to the mounting groove 4 in one direction, effectively preventing the backflow of lubricating oil when the gear rotates at high speed. The opening and closing of the diaphragm one-way oil supply valve 8 is controlled by a buffer pad. 3. Pressure change control on the inner side: When the meshing pressure increases, the inner side of the valve buffer pad 3 is compressed, the valve closes, and the lubricating oil inside the buffer pad 3 can only be squeezed out through the bottom gaps of multiple elastic rubber sheets 9, while the valve one-way oil supply valve 8 does not allow the lubricating oil to pass through; when the meshing pressure decreases, the valve buffer pad 3 and the elastic rubber sheets 9 reset, generating a negative pressure inside the valve buffer pad 3, the valve of the valve one-way oil supply valve 8 opens, and the valve buffer pad 3 draws in lubricating oil from the bottom suction hole 7 of the one-way oil supply pipe 6 through the inner negative pressure, thus improving the oil delivery efficiency.

[0020] In this embodiment, preferably, the buffer pad 3 is a wear-resistant rubber pad, and a compression groove is formed at the center of the inner side of the buffer pad 3. Multiple elastic rubber sheets 9 are installed on the inner wall of the compression groove of the buffer pad 3, and the elastic rubber sheets 9 are elastic rubber pads. Through the wear-resistant rubber material of the buffer pad 3, the buffer pad 3 can undergo elastic deformation when subjected to meshing pressure, effectively absorbing and dispersing impact force, thereby reducing tooth surface friction and noise generation. The elastic rubber sheets 9, as elastic rubber pads, not only provide additional elastic support but also bend when the buffer pad 3 is compressed, further enhancing the buffering effect. This design combines multiple advantages of buffering, noise reduction, and wear resistance, significantly improving the performance and reliability of the gear structure under high-speed, heavy-load conditions.

[0021] In this embodiment, preferably, a sealing rubber pad is fixedly connected to the bottom of the mounting groove 4; when the sealing rubber pad at the bottom of the mounting groove 4 contacts the bottom of the elastic rubber sheet 9, the contact surface is sealed under the elastic pressure of the elastic rubber sheet 9, ensuring one-way delivery of lubricating oil.

[0022] In this embodiment, preferably, the upper inner edge of the oil storage tray 5 is open, and the bottom of the inner cavity of the oil storage tray 5 is filled with an oil-absorbing sponge 12. The opening on the upper inner edge of the oil storage tray 5 can guide the lubricating oil splashed into the inner side of the oil storage tray 5 from the gearbox into the oil storage tray 5 for storage. The oil-absorbing sponge 12 in the oil storage tray 5 can continuously absorb and store lubricating oil, ensuring that even when the gear rotates at high speed, even if the centrifugal force is strong, the lubricating oil can be replenished in time through the one-way oil supply pipe 6 and the valve one-way oil supply valve 8 to avoid insufficient lubrication, and also absorb and filter the lubricating oil.

[0023] In this embodiment, preferably, a capillary oil storage groove 11 is provided at the center of the outer side of the convex tooth of the driving pinion 2; the capillary oil storage groove 11 at the center of the outer side of the convex tooth of the driving pinion 2 can assist the dispersion of lubricating oil when the lubricating oil is squeezed out at the oil outlet 10, and store a small amount of lubricating oil during the rotation of the gear, further extending the lubrication time and reducing tooth surface wear and noise generation.

[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. A low-noise helical gear structure for a handling loader, comprising a driven large gear (1) and a driving small gear (2), wherein the driven large gear (1) and the driving small gear (2) mesh with each other, characterized in that: The driven gear (1) has an installation groove (4) between adjacent teeth, and a buffer pad (3) is fixedly connected in the installation groove (4). The upper end of the buffer pad (3) is provided with an oil outlet hole (10) near the center of the driven gear (1), and multiple elastic rubber sheets (9) are evenly distributed at the bottom of the inner wall of the buffer pad (3). The inner end of the elastic rubber sheet (9) is inclined towards the center of the driven gear (1). The bottom of the driven gear (1) is provided with an oil storage chassis (5), and the bottom of the groove (4) near the outer ring of the driven gear (1) is connected to the bottom of the oil storage chassis (5) through a one-way communication mechanism.

2. The low-noise helical gear structure for a handling loader according to claim 1, characterized in that: The one-way communication mechanism includes a one-way oil supply pipe (6), which passes through the bottom of the mounting groove (4) and is located near the outer ring of the driven gear (1) and faces the inner cavity of the oil storage chassis (5). A valve one-way oil supply valve (8) is provided at the top of the one-way oil supply pipe (6), and an oil suction hole (7) is provided at the bottom of the side wall of the one-way oil supply pipe (6).

3. The low-noise helical gear structure for a handling loader according to claim 1, characterized in that: The buffer pad (3) is a wear-resistant rubber pad, and a compression groove is provided in the center of the inner side of the buffer pad (3). Multiple elastic rubber sheets (9) are installed on the inner wall of the compression groove of the buffer pad (3), and the elastic rubber sheets (9) are elastic rubber pads.

4. The low-noise helical gear structure for a handling loader according to claim 1, characterized in that: The bottom of the mounting groove (4) is fixedly connected with a sealing rubber pad.

5. The low-noise helical gear structure for a handling loader according to claim 1, characterized in that: The oil storage chassis (5) has an opening on the upper inner side, and the bottom of the inner cavity of the oil storage chassis (5) is filled with an oil-absorbing sponge (12).

6. The low-noise helical gear structure for a handling loader according to claim 1, characterized in that: The outer center of the protruding tooth of the active pinion (2) is provided with a capillary oil reservoir (11).

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