Effective lubricating structure for track roller of crawler-type chassis

Abstract

The utility model provides an effective lubrication structure for crawler-type chassis thrust wheels, which comprises a machine chassis crossbeam, a thrust wheel support, a thrust wheel axle, thrust wheels and a bearing, the bearing is mounted between the thrust wheel support and the thrust wheel axle, the thrust wheels are mounted at two ends of the thrust wheel axle, and the thrust wheels are mounted on the thrust wheel axle. A ventilation cap is installed in the middle of a shell of the thrust wheel support. The ventilation cap comprises a mounting seat, a sealing gasket, a sealing ring, a ventilation valve, a spring and a cover, and a counter bore and a threaded hole for mounting the ventilation cap are machined in the middle of a shell of the thrust wheel support. According to the utility model, the technical problems that the bearing, the oil seal and the like in the thrust wheel cannot be lubricated in time to cause premature failure and the whole group of thrust wheels are scrapped prematurely due to the fact that grease is inconvenient to add or cannot be added because the interior of the thrust wheel is completely closed in the conventional oil injection mode are solved.

Description

Technical Field

[0001] The utility model relates to the field of crawler machines, in particular to an effective lubrication structure used in a track-type chassis supporting roller. Background Art

[0002] The chassis of crawler machines, especially crawler agricultural harvesters and tractors, all use multiple sets of track rollers to support the weight of the entire vehicle, so that the entire vehicle can move normally. The role of the track roller is very important. As long as the machine is working, the entire track roller system is also working all the time. It is a typical component with a large workload, poor working environment, large impact, and long working time. In the specific use process, the track roller will inevitably come into contact with mud and water, so it must be designed as a fully enclosed waterproof and mud-proof structure. In this use scenario, whether there is reasonable and effective lubrication directly affects the service life of the internal bearings and even the entire track roller.

[0003] The mainstream track roller structures currently on the market are as follows: Figure 1 As shown, although the internal bearing lubrication problem has been taken into consideration at the beginning of the design of the supporting roller structure and an oil filling cup has been designed at the external shaft end, the internal structure of the supporting roller is completely sealed and the combined oil seal has a good sealing effect. When oil is filled, the volume of the internal cavity decreases, and the internal air cannot be discharged in time, resulting in an increase in the internal air pressure. It is difficult to effectively fill the interior with oil using an ordinary handheld pressure oil gun. Forcibly filling the oil will cause the internal air pressure to be too high, and the air will have to be exhausted to the external atmosphere through the lip of the combined oil seal to release the pressure, causing the oil to leak and the oil seal to deform and fail prematurely, thereby further affecting the service life of the entire set of supporting rollers, resulting in a loss of the greater for the smaller. Utility Model Content

[0004] The utility model aims to provide an effective lubrication structure for track-type chassis supporting wheels to overcome the above problems or at least partially solve the above problems.

[0005] In order to achieve the above-mentioned purpose, the technical solution of the utility model is specifically implemented as follows:

[0006] The utility model provides an effective lubrication structure for tracked chassis rollers, comprising a machine chassis beam, a roller support, a roller shaft, rollers and bearings, characterized in that a bearing is installed between the roller support and the roller shaft, rollers are installed at both ends of the roller shaft, and a breathable cap is installed in the middle of the housing of the roller support;

[0007] The breathable cap includes a mounting seat, a sealing gasket, a sealing ring, a breathable valve, a spring and a cover. A countersunk hole and a threaded hole for mounting the breathable cap are processed in the middle of the shell of the supporting wheel support. A breathable hole is arranged through the mounting seat. A breathable valve for controlling the opening and closing of the breathable hole is installed inside the mounting seat. A sealing ring is sleeved on the outside of the breathable valve. A spring is sleeved on the outer wall of one end of the breathable valve. A cover is arranged on the end of the mounting seat close to the spring.

[0008] As a further solution of the utility model, the threaded hole is located in the countersunk hole and passes through the interior of the track roller support. The outer wall of the mounting seat at one end away from the spring is provided with a thread, and the mounting seat is connected to the threaded hole of the track roller support through the thread.

[0009] As a further solution of the utility model, a sealing gasket is provided on the middle outer wall of the mounting seat.

[0010] As a further solution of the utility model, the machine chassis beam is installed on the supporting wheel support, nuts, spring washers and flat washers are installed on both ends of the supporting wheel shaft, a combined oil seal and a retaining spring are arranged between the supporting wheel support and the supporting wheel, and a lubricating oil cup is installed at one end of the supporting wheel shaft.

[0011] The utility model provides an effective lubrication structure for tracked chassis supporting wheels, and the beneficial effects are:

[0012] 1. By adding a breather cap to the housing of the track roller support, the breather cap is a common part in the machinery industry, with low cost, easy installation, and reliable use. It can achieve a basic balance of pressure inside and outside the cavity. When grease is added, the internal pressure is higher than the external pressure, and the excess air inside is discharged through the breather cap to achieve effective grease filling, lubrication of bearings and oil seals. When the internal and external pressures are basically the same or the internal pressure is slightly lower than the external pressure, it remains closed, effectively preventing external mud and dirt from entering the cavity and causing damage. The breather cap is designed to be installed at the rear of the track roller support housing (i.e., directly behind the forward direction of the machine), which protects the structure from being hit by foreign objects to the greatest extent, and has a long service life. It solves the problem that the existing oiling method is inconvenient to add grease or cannot add grease due to the complete internal closure, thereby causing the internal bearings and oil seals of the track rollers to fail prematurely due to lack of timely lubrication. In severe cases, the entire set of track rollers is directly scrapped prematurely. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0014] Figure 1 This is a schematic diagram of the overall structure of the utility model when the machine is in the forward direction.

[0015] Figure 2 For this utility model Figure 1 Schematic diagram of the structure at AA in the middle.

[0016] Figure 3 It is a detailed structural diagram of the air permeable cap in the utility model.

[0017] In the figure: 1. nut; 2. spring washer; 3. flat washer; 4. track roller; 5. combined oil seal; 6. retaining ring; 7. bearing; 8. breather cap; 801. mounting seat; 802. sealing gasket; 803. sealing ring; 804. breather valve; 805. spring; 806. cover; 9. track roller support; 10. track roller shaft; 11. lubricating oil cup; 12. countersunk hole; 13. machine chassis beam. DETAILED DESCRIPTION

[0018] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0019] See also Figure 1-3 The utility model provides an effective lubrication structure for tracked chassis rollers, comprising a machine chassis beam 13, a roller support 9, a roller shaft 10, a roller 4 and a bearing 7, characterized in that a bearing 7 is installed between the roller support 9 and the roller shaft 10, rollers 4 are installed at both ends of the roller shaft 10, and a breathable cap 8 is installed in the middle of the housing of the roller support 9;

[0020] The breathable cap 8 includes a mounting seat 801, a sealing gasket 802, a sealing ring 803, a breathable valve 804, a spring 805 and a cover 806. A countersunk hole 12 and a threaded hole for mounting the breathable cap 8 are processed in the middle of the shell of the supporting wheel support 9. A breathable hole is arranged through the mounting seat 801. A breathable valve 804 for controlling the opening and closing of the breathable hole is installed inside the mounting seat 801. A sealing ring 803 is sleeved on the outside of the breathable valve 804. A spring 805 is sleeved on the outer wall of one end of the breathable valve 804. A cover 806 is arranged on the end of the mounting seat 801 close to the spring 805.

[0021] like Figure 2 As shown, the threaded hole is located in the countersunk hole 12, and the threaded hole passes through the interior of the supporting roller support 9. The outer wall of the end of the mounting seat 801 away from the spring 805 is provided with a thread, and the mounting seat 801 is connected to the threaded hole of the supporting roller support 9 through the thread.

[0022] like Figure 2 As shown, a sealing gasket 802 is sleeved on the middle outer wall of the mounting seat 801, a machine chassis beam 13 is mounted on the supporting roller support 9, nuts 1, spring washers 2 and flat washers 3 are installed at both ends of the supporting roller shaft 10, a combined oil seal 5 and a retaining spring 6 are arranged between the supporting roller support 9 and the supporting roller 4, and a lubricating oil cup 11 is installed at one end of the supporting roller shaft 10.

[0023] The utility model adds a common air cap 8 in the mechanical industry, so that the supporting wheel 4 can be effectively and conveniently filled with sufficient grease, and whether the grease is filled in sufficient amount can be determined by whether the air cap 8 overflows. The air cap 8 is a common part in the industry, with low cost, convenient installation, and reliable use. The air cap 8 has a simple structure and is one-way ventilated. It opens to exhaust when the internal pressure is greater than the external pressure, and closes when the internal and external pressures are the same or the internal pressure is slightly smaller, preventing foreign matter from entering the cavity, keeping the grease in the cavity clean, and effectively extending the service life of the supporting wheel 4. The air cap 8 solves the problem that when the internal pressure is too high, the grease leaks to the outside along with the exhaust and the oil seal is deformed and fails prematurely.

[0024] We have thoroughly considered the shortcomings of the existing structure and tried to solve the existing oil filling problem with the least amount of modification. In view of this, we proposed to add a one-way openable and closable industry-wide vent cap 8 solution. Figure 1-2 As shown, on the housing of the track roller support 9, at the rear of the machine's forward direction (such as Figure 1 ) Process the countersunk hole 12 and the threaded hole, add a vent cap 8, and install it into the countersunk hole 12. The detailed structure of the vent cap 8 is as follows Figure 3 As shown;

[0025] The specific working process is as follows: first, when the machine supporting roller 4 needs maintenance after working for a period of time, we use a handheld grease gun to aim at the oil cup at the end of the shaft to add lubricating grease. The grease is pressed into the oil storage cavity inside the supporting roller 4 seat along the oil filling hole inside the shaft. At the same time, the internal cavity volume decreases accordingly, and the internal pressure is higher than the external pressure. The breathable cap 8 (such as Figure 3 ) is pushed open, and the internal air is discharged, achieving a basic balance between the internal and external pressures;

[0026] Secondly, when the grease is close to being filled, some of the grease will overflow along with the opening of the air valve 804. At this time, we can consider that the grease has been filled in a sufficient amount and stop filling. That is, the grease overflowing from the air cap 8 can be used as a sign of whether the grease has been filled in a sufficient amount;

[0027] Secondly, when the internal pressure caused by various reasons such as thermal expansion and contraction is slightly lower than the external pressure, the breathable cap 8 (such as Figure 3) is closed by the spring 805 and sealed by the sealing ring 803, which can effectively prevent external dirt and muddy water from entering the cavity. In addition, sufficient grease will also form a grease seal, further ensuring the durability of the internal bearing 7;

[0028] Again, the breathable cap 8 is installed in the countersunk hole 12 at the rear of the machine in the forward direction, which protects the breathable cap 8 from being knocked by foreign objects to the greatest extent;

[0029] Finally, this plan only requires adding drilling and tapping processes on the original four supporting wheels. The original blanks and components can continue to be used without being affected, other components are completely universal, and the cost of the improvement plan is controllable.

[0030] The above are only embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included within the scope of the claims of the present application.

Claims

1. An effective lubrication structure for tracked chassis track rollers, comprising a machine chassis beam (13), a track roller support (9), a track roller shaft (10), a track roller (4) and a bearing (7), characterized in that: A bearing (7) is installed between the track roller support (9) and the track roller shaft (10), track rollers (4) are installed at both ends of the track roller shaft (10), and a breathable cap (8) is installed in the middle of the shell of the track roller support (9); The vent cap (8) comprises a mounting seat (801), a sealing gasket (802), a sealing ring (803), a vent valve (804), a spring (805) and a cover (806); a countersunk hole (12) and a threaded hole for mounting the vent cap (8) are processed in the middle of the shell of the roller support (9); a vent hole is provided through the mounting seat (801); a vent valve (804) for controlling the opening and closing of the vent hole is installed inside the mounting seat (801); a sealing ring (803) is sleeved on the outside of the vent valve (804); a spring (805) is sleeved on the outer wall of one end of the vent valve (804); and a cover (806) is provided on one end of the mounting seat (801) close to the spring (805).

2. An effective lubrication structure for tracked chassis rollers according to claim 1, characterized in that: The threaded hole is located in the countersunk hole (12), and the threaded hole passes through the interior of the supporting roller support (9). The outer wall of the end of the mounting seat (801) away from the spring (805) is provided with a thread, and the mounting seat (801) is connected to the threaded hole of the supporting roller support (9) through the thread.

3. The effective lubrication structure for tracked chassis roller according to claim 1, characterized in that: A sealing gasket (802) is sleeved on the middle outer wall of the mounting seat (801).

4. The effective lubrication structure for tracked chassis rollers according to claim 1, characterized in that: The machine chassis beam (13) is mounted on a track roller support (9), nuts (1), spring washers (2) and flat washers (3) are mounted on both ends of the track roller shaft (10), a combined oil seal (5) and a retaining spring (6) are arranged between the track roller support (9) and the track roller (4), and a lubricating oil cup (11) is mounted on one end of the track roller shaft (10).

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