Highly reliable track-laying tractor gear

Abstract

The utility model discloses high reliability caterpillar tractor gear, it includes gear body (1) and a plurality of main helical tooth (2), is equipped with a plurality of vice straight tooth (3) on the top surface of main helical tooth (2);The surface of gear body (1) is provided with wear -resisting layer (4) and intermediate layer (5);The both sides of gear body (1) are equipped with limit boss (6) all, and is equipped with detection groove (7) on every limit boss (6);The notch of detection groove (7) is sealedly installed with transparent baffle (8), and the baffle (8) is provided with scale line;Detection groove (7) fills in the liquid for detecting level, and the top surface of liquid is flush with scale line;The middle part of gear body (1) is equipped with installation through -hole (9). The utility model not only can improve the reliability of gear drive, still has the advantages such as long service life, high use stability, good lubrication effect and good heat dissipation effect.

Description

Technical Field

[0001] This utility model relates to a gear, particularly a high-reliability tracked tractor gear. Background Technology

[0002] Gears are mechanical parts with teeth on their rims that enable continuous meshing transmission. They are indispensable components of tracked tractors. During actual operation, tracked tractors generate significant vibrations, which can easily cause collisions, loosening, or gear misalignment between gears and gear shafts. Gear misalignment leads to uneven force distribution on the gears, resulting in abnormal wear during meshing and transmission, causing slippage and reduced transmission reliability. Therefore, existing tracked tractor gears suffer from relatively low transmission reliability. Utility Model Content

[0003] The purpose of this invention is to provide a highly reliable gear for tracked tractors. This invention has the advantage of high reliability in gear transmission.

[0004] The technical solution of this utility model: a high-reliability tracked tractor gear, comprising a gear body and multiple main helical teeth disposed on the outer surface of the gear body. Multiple evenly distributed secondary spur teeth are provided on the top surface of the main helical teeth, the height of which is half the height of the main helical teeth. A wear-resistant layer is disposed on the surface of the gear body, with an intermediate layer between the wear-resistant layer and the gear body. Annular limiting bosses are provided on both sides of the gear body, and each limiting boss has a detection groove along its thickness. A transparent baffle is sealed at the opening of the detection groove, and scale lines are provided on the baffle. The detection groove is filled with a liquid for leveling, the top surface of which is flush with the scale lines. A mounting through hole is provided in the middle of the gear body. The meshing transmission between the secondary spur teeth generates a component force opposite to the axial force of the main helical teeth, thereby reducing the overall gear's resistance to mechanical stress. The axial force causes misalignment, thus reducing abnormal wear on the gear teeth and ensuring the reliability of gear transmission. A wear-resistant layer and an intermediate layer form a reinforcing layer on the outer surface of the gear body, further reducing wear. The intermediate layer also creates a gradient between the wear-resistant layer and the gear body, preventing wear peeling and extending service life. A limiting boss engages with the gearbox thrust ring on a tracked tractor to limit axial displacement, ensuring operational stability. The detection groove, transparent baffle, and leveling fluid on the limiting boss allow for observation of the fluid level and scale markings to determine if the gear is misaligned during installation, preventing uneven stress and wear caused by misalignment and ensuring reliable meshing.

[0005] In the aforementioned high-reliability tracked tractor gear, an arc-shaped thermal compensation groove is provided on the gear body at the position between each pair of adjacent main helical teeth; a rounded corner is provided at the position where the main helical teeth connect with the secondary spur teeth; the thermal compensation groove can compensate for the change in gear size when the entire gear expands due to heat, avoiding jamming or abnormal wear caused by the reduction of meshing clearance, and ensuring the stability of transmission.

[0006] In the aforementioned high-reliability tracked tractor gears, the helix angle of the main helical tooth is 12° to 15°.

[0007] In the aforementioned high-reliability tracked tractor gear, the limiting boss is provided with multiple annularly evenly distributed grooves, and a first strip groove is provided on the outer surface of the limiting boss at the position between each two adjacent main helical teeth; a second strip groove connected to the first strip groove is provided on the side surface of the gear body at the position between each two adjacent main helical teeth, and a sponge strip for guiding lubricating oil is adhered between the second strip groove and the first strip groove; the sponge strip can replenish lubricating oil between the main helical teeth for lubrication, thus achieving the purpose of self-lubrication.

[0008] In the aforementioned high-reliability tracked tractor gear, the height of the sponge strip is less than the depth of the first groove; the depth of the first groove is the same as the depth of the second groove.

[0009] In the aforementioned high-reliability tracked tractor gear, a positioning groove is provided on the inner top surface of the mounting through hole; the detection groove is located directly above the positioning groove; the positioning groove further limits the position of the entire gear installation, ensuring that the liquid in the detection groove guarantees the detection of the gear installation and ensuring the accuracy of the detection.

[0010] In the aforementioned high-reliability tracked tractor gear, the wear-resistant layer is made of nickel-based tungsten carbide alloy; the intermediate layer is made of low-carbon alloy steel; and a fluorescent agent is mixed in the liquid.

[0011] Compared with existing technologies, this invention improves upon existing tractor gears by providing multiple evenly distributed secondary spur teeth on the top surface of the main helical gear. These secondary spur teeth, together with the main helical gear, form a composite tooth structure. During meshing, the meshing transmission between the secondary spur teeth generates a component force opposite to the axial force of the main helical gear, thereby reducing gear misalignment due to axial force and mitigating abnormal tooth surface wear, ensuring reliable gear transmission. Furthermore, by coating the gear body with a wear-resistant layer and establishing an intermediate layer between the wear-resistant layer and the gear body, a reinforcing layer is formed on the outer surface of the gear body, further reducing wear on the gear body. Furthermore, the inner layer increases the gradient transition between the wear-resistant layer and the gear body, preventing the wear-resistant layer from peeling off and extending its service life. Simultaneously, by providing limiting bosses on both sides of the gear body, these bosses can engage with the gearbox thrust ring on the tracked tractor to limit the axial displacement of the gear, ensuring operational stability. The detection grooves, transparent baffles, and liquid level detection features on the limiting bosses allow for observation of the liquid level and scale lines to determine if the gear is misaligned during installation. This prevents uneven stress and wear caused by misaligned installation, ensuring reliable meshing.

[0012] Furthermore, this invention also features a thermal compensation groove between each pair of adjacent main helical teeth. This groove compensates for changes in gear dimensions during thermal expansion (approximately 0.05mm to 0.1mm at 100℃), preventing gear jamming or abnormal wear due to reduced meshing clearance and ensuring transmission stability. Multiple annularly distributed grooves on the limiting boss reduce its mass while increasing the heat dissipation area, improving heat dissipation. A first and second strip-shaped groove are interconnected on the gear body and the limiting boss, with a sponge strip installed between them. This sponge strip allows lubricating oil to be supplied between the main helical teeth for self-lubrication. Finally, a positioning groove on the inner top surface of the mounting hole further limits the gear's installation position, ensuring the accuracy of the detection by the liquid in the detection groove. Therefore, this invention not only improves the reliability of gear transmission, but also has the advantages of long service life, high stability, good lubrication, and good heat dissipation. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model;

[0014] Figure 2This is a schematic diagram of the internal structure of this utility model;

[0015] Figure 3 This is a top view of the gear body of this utility model.

[0016] Figure 4 yes Figure 1 A magnified view of a section at point A in the middle;

[0017] Figure 5 yes Figure 2 A magnified view of a section at point B in the middle.

[0018] The markings in the attached diagram are as follows: 1-Gear body, 2-Main helical tooth, 3-Secondary spur tooth, 4-Wear-resistant layer, 5-Intermediate layer, 6-Limiting boss, 7-Detection groove, 8-Baffle, 9-Mounting through hole, 10-Heat compensation groove, 11-Sponge strip. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the present invention.

[0020] Example. High-reliability tracked tractor gears, configured as follows: Figures 1 to 5 As shown, the gear includes a gear body 1 and multiple main helical teeth 2 disposed on the outer surface of the gear body 1. Multiple evenly distributed secondary spur teeth 3 are provided on the top surface of the main helical teeth 2, with the height of the secondary spur teeth 3 being half the height of the main helical teeth 2. A wear-resistant layer 4 is provided on the surface of the gear body 1, and an intermediate layer 5 is provided between the wear-resistant layer 4 and the gear body 1. Annular limiting bosses 6 are provided on both sides of the gear body 1, and each limiting boss 6 has a detection groove 7 along its thickness direction. A transparent baffle 8 is sealed at the opening of the detection groove 7, and scale lines are provided on the baffle 8. The detection groove 7 is filled with a liquid for leveling, and the top surface of the liquid is flush with the scale lines. A mounting through hole 9 is provided in the middle of the gear body 1.

[0021] The gear body 1 has an arc-shaped heat compensation groove 10 at each position between two adjacent main helical teeth 2; the position where the main helical teeth 2 connects to the secondary spur teeth 3 has a rounded corner; the helix angle of the main helical teeth 2 is 12° to 15°; the limiting boss 6 has multiple annularly distributed grooves, and the outer surface of the limiting boss 6 has a first strip groove at each position between two adjacent main helical teeth 2; the side surface of the gear body 1 has a second strip groove connected to the first strip groove at each position between two adjacent main helical teeth 2, and a sponge strip 11 for guiding lubricating oil is adhered between the second strip groove and the first strip groove; the height of the sponge strip 11 is less than the depth of the first strip groove; the depth of the first strip groove is the same as the depth of the second strip groove; the inner top surface of the mounting through hole 9 has a positioning groove; the detection groove 7 is located directly above the positioning groove; the wear-resistant layer 4 is made of nickel-based tungsten carbide alloy; the intermediate layer 5 is made of low-carbon alloy steel; and the liquid contains a fluorescent agent.

[0022] Working Principle: First, the secondary spur gear 3 and the primary helical gear 2 form a composite tooth structure. During gear meshing, the secondary spur gear 3 will transmit power to the primary spur gear 2 before the primary helical gear 2. During the transmission between the secondary spur gear 3, a tangential force and a radial force are generated. Meanwhile, during the transmission between the primary helical gear 2, an axial force is generated. The tangential and radial forces can counteract the axial force (counteracting 60% to 80% of the axial force), thus effectively preventing the entire gear from shifting due to axial force, reducing abnormal wear on the tooth surface caused by shifting, and ensuring the reliability of gear transmission. Furthermore, when the gear is installed on the tracked tractor, the liquid in the detection groove 7 on the limiting boss 6 is compared with the scale line on the baffle to determine if there is any misalignment during gear installation (when misaligned, the liquid level will not be level with the scale line, while when properly installed, the liquid level is level with the scale line), preventing the gear from being subjected to force due to misalignment. Uneven force and uneven wear are addressed to ensure reliable meshing. Furthermore, a wear-resistant layer 4 is coated on the surface of the gear body 1, with an intermediate layer 5 between the wear-resistant layer 4 and the gear body 1. The wear-resistant layer 4 and the intermediate layer 5 form a reinforcing layer on the outer surface of the gear body 1, reducing wear. The intermediate layer 5 also increases the gradient transition between the wear-resistant layer 4 and the gear body 1, preventing the wear-resistant layer 4 from peeling off and extending its service life. The thermal compensation groove 10 compensates for changes in gear dimensions during thermal expansion (approximately 0.05mm to 0.1mm at 100℃), preventing jamming or abnormal wear due to reduced meshing clearance and ensuring transmission stability. Simultaneously, the sponge strip 11 allows lubricant to be applied to the main helical gear 2 when needed, and then transferred to the sponge strip 11 for further lubrication. It also allows for some storage, achieving automatic lubrication for a certain period.

Claims

1. A high-reliability tracked tractor gear, comprising a gear body (1) and a plurality of main helical teeth (2) disposed on the outer surface of the gear body (1), characterized in that: The top surface of the main helical tooth (2) is provided with a plurality of evenly distributed secondary spur teeth (3), the height of the secondary spur teeth (3) being half the height of the main helical tooth (2); a wear-resistant layer (4) is provided on the surface of the gear body (1), and an intermediate layer (5) is provided between the wear-resistant layer (4) and the gear body (1); both sides of the gear body (1) are provided with annular limiting bosses (6), and each limiting boss (6) is provided with a detection groove (7) along the thickness direction of the limiting boss (6); a transparent baffle (8) is sealed at the opening of the detection groove (7), and a scale line is provided on the baffle (8); the detection groove (7) is filled with liquid for detecting level, and the top surface of the liquid is flush with the scale line; the middle part of the gear body (1) is provided with a through hole (9).

2. The high-reliability tracked tractor gear according to claim 1, characterized in that: The gear body (1) is provided with an arc-shaped heat compensation groove (10) at the position between each two adjacent main helical teeth (2); the position where the main helical teeth (2) connects with the secondary spur teeth (3) is provided with a rounded corner.

3. The high-reliability tracked tractor gear according to claim 1, characterized in that: The helix angle of the main helical tooth (2) is 12° to 15°.

4. The high-reliability tracked tractor gear according to claim 1, characterized in that: The limiting boss (6) is provided with a plurality of annularly distributed grooves. A first strip groove is provided on the outer side of the limiting boss (6) at the position between each two adjacent main helical teeth (2). A second strip groove connected to the first strip groove is provided on the side of the gear body (1) at the position between each two adjacent main helical teeth (2). A sponge strip (11) for guiding lubricating oil is adhered between the second strip groove and the first strip groove.

5. The high-reliability tracked tractor gear according to claim 4, characterized in that: The height of the sponge strip (11) is less than the depth of the first groove; the depth of the first groove is the same as the depth of the second groove.

6. The high-reliability tracked tractor gear according to claim 1, characterized in that: The mounting through hole (9) has a positioning groove on its inner top surface; the detection groove (7) is located directly above the positioning groove.

7. The high-reliability tracked tractor gear according to any one of claims 1 to 6, characterized in that: The wear-resistant layer (4) is made of nickel-based tungsten carbide alloy; the intermediate layer (5) is made of low-carbon alloy steel; and the liquid contains a fluorescent agent.

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