An oil leakage-proof breathing structure of an electric rotary tiller gear box

Abstract

The utility model discloses a kind of oil leakage prevention breathing structures of electric rotary tiller gear box, including gear box 2 and the motor 4 of installation with gear box 2 one end, exhaust cavity 20 being provided with in the communication gear box 2 inner chamber between gear box 2 and motor 4, the top of this exhaust cavity 20 is provided with exhaust screw 201, the bottom of this exhaust cavity 20 is provided with the oil return hole 202 of connecting head gear box 2 inner chamber. One end of gear box 2 is provided with exhaust cavity 20, so that the lubricating grease inside gear box 2 flows into exhaust cavity 20 convergence after gasification due to high-speed operation of gear, high-pressure gas is discharged by exhaust screw 201 in the top of exhaust cavity 20, avoid excessive pressure in gear box 2, while lubricating grease condenses along inner wall and flows into oil return hole 202 in lower end in exhaust cavity 20, reflows into gear box 2, thereby effectively avoid lubricating grease overflow gear box 2, ensure the long-term operation of gear box 2, reduce the oil supplement frequency of gear box 2, effectively prevent lubricating grease overflow gear box 2 and pollute farmland.

Description

Technical Field

[0001] This utility model relates to the field of agricultural machinery, and specifically to an oil-leakage-proof breathing structure for an electric rotary tiller gearbox. Background Technology

[0002] Agricultural machinery (referred to as "agricultural equipment") refers to various mechanical equipment used in agricultural production and related processes, including tractors, seeders, harvesters, and plant protection drones, aiming to improve agricultural production efficiency, reduce labor intensity, and ensure food security. The development of agricultural machinery has undergone a process from traditional manual labor to full mechanization: China gradually established its agricultural machinery industrial system after 1949, producing its first "Dongfanghong" tractor in 1958. Before the reform and opening up, it had already formed a machinery manufacturing capacity covering tillage, sowing, and harvesting. Currently, agricultural machinery has become a core force driving the high-quality development of modern agriculture.

[0003] Modern agricultural machinery includes a tractor (e.g., a tractor unit) and a tillage unit (e.g., a rotary tiller). Rotary tillers have a wide range of applications. For example, Chinese patent application publication number CN 116998260 A discloses a rotary tillage mechanism for an agricultural tiller, which includes: a mounting frame, a gearbox located in the middle of the mounting frame, a cutter shaft assembly located at the lower end of the gearbox, a motor located at the upper end of the gearbox, a shifting mechanism located at the connection between the motor and the gearbox, and a first bearing module and a second bearing module located on both sides of the mounting frame to support the cutter shaft assembly. The mounting frame has a first upright plate and a second upright plate on both sides for mounting the first and second bearing modules, respectively. By using the first and second upright plates on both sides of the mounting frame, along with the first and second bearing modules, to support both ends of the cutter shaft assembly, the force on the cutter shaft assembly is balanced during operation. This prevents the cutter shaft assembly from bending during tillage, ensuring consistent tillage depth, improving the dynamic balance performance of the cutter shaft assembly, extending its service life, and reducing gearbox wear.

[0004] However, as described in the aforementioned patent, the conventional gearbox exhaust screw is located on the side (attached). Figure 2 When the internal pressure of the gearbox is too high during long-term operation, the lubricating grease will vaporize and accumulate in the vent screw. Since the vent screw is located on the side of the gearbox and is placed horizontally, the vaporized grease will cool down and accumulate at the vent screw and overflow. This not only easily clogs the vent screw, but also the large amount of grease overflow will affect the operation of the mechanism and pollute the farmland.

[0005] In view of the above, the inventors propose the following technical solution. Utility Model Content

[0006] The purpose of this invention is to overcome the shortcomings of the prior art and provide an oil-proof breathing structure for an electric rotary tiller gearbox.

[0007] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: an oil-proof breathing structure for an electric rotary tiller gearbox, comprising: a gearbox and a motor installed at one end of the gearbox, an exhaust chamber communicating with the inner cavity of the gearbox at one end of the gearbox, an exhaust screw at the top of the exhaust chamber, and an oil return hole for connecting the head to the inner cavity of the gearbox at the bottom of the exhaust chamber.

[0008] Furthermore, in the above technical solution, the gearbox includes a main housing, a lower housing disposed at the lower end of the main housing, and a rear housing disposed at one end of the main housing, wherein the motor is installed at the other end of the main housing, and the oil return hole is connected to the lower housing.

[0009] Furthermore, in the above technical solution, a groove is provided at the end of the main housing to cooperate with the motor to form an exhaust chamber, wherein the exhaust screw and the oil return hole are located at the upper and lower ends of the groove, respectively.

[0010] Furthermore, in the above technical solution, the main housing is provided with connecting brackets on both sides for connecting and installing with the mounting frame, the mounting frame is provided with shock-absorbing brackets for installing the connecting brackets, and shock-absorbing adhesive is provided between the shock-absorbing brackets and the connecting brackets.

[0011] Furthermore, in the above technical solution, the shock-absorbing bracket is provided with a positioning ring for fitting the positioning shock-absorbing rubber.

[0012] Furthermore, in the above technical solution, damping rubber is provided on both the upper and lower sides of the damping bracket, and the connecting bracket, the damping bracket and the damping rubber are connected in series and fixed by the first bolt group passing through.

[0013] After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art: In the present invention, an exhaust chamber is set at one end of the gearbox, so that the grease inside the gearbox is vaporized by the high-speed operation of the gear and flows into the exhaust chamber and gathers. The high-pressure gas is discharged through the exhaust screw at the top of the exhaust chamber, avoiding excessive pressure inside the gearbox. At the same time, the grease condenses when it encounters cold in the exhaust chamber and gathers along the inner wall to the oil return hole at the lower end, and flows back into the gearbox, thereby effectively preventing the grease from overflowing from the gearbox, ensuring the long-term operation of the gearbox, reducing the frequency of gearbox oil replenishment, and effectively preventing the grease from overflowing from the gearbox and polluting the farmland. Attached Figure Description

[0014] Figure 1 This is a reference diagram showing the usage state of this utility model;

[0015] Figure 2 This is a schematic diagram of the shock absorption mechanism in this utility model;

[0016] Figure 3This is an exploded view of the shock absorption mechanism in this utility model;

[0017] Figure 4 This is a schematic diagram of the assembly structure of the gearbox and motor in this utility model;

[0018] Figure 5 This is a schematic diagram of the structure of this utility model;

[0019] Figure 6 This is a schematic diagram of the main shell structure in this utility model. Detailed Implementation

[0020] The present invention will be further described below with reference to specific embodiments and accompanying drawings.

[0021] See Figures 1 to 6 The diagram shows a leak-proof breathing structure for an electric rotary tiller gearbox, comprising a gearbox 2 and a motor 4 mounted on one end of the gearbox 2. An exhaust chamber 20, communicating with the inner cavity of the gearbox 2, is provided between the gearbox 2 and the motor 4. An exhaust screw 201 is located at the top of the exhaust chamber 20, and an oil return hole 202 connecting to the inner cavity of the gearbox 2 is located at the bottom of the exhaust chamber 20. By using an exhaust chamber 20 at one end of the gearbox 2, the grease inside the gearbox 2 vaporizes due to the high-speed operation of the gears and flows into the exhaust chamber 20, where it collects. The high-pressure gas is then discharged through the exhaust screw 201 at the top of the exhaust chamber 20, preventing excessive pressure inside the gearbox 2. Simultaneously, the grease condenses upon cooling within the exhaust chamber 20, collects along the inner wall, and flows back into the gearbox 2 through the oil return hole 202 at the bottom. This effectively prevents grease from overflowing from the gearbox 2, ensuring long-term operation of the gearbox 2, reducing the frequency of oil replenishment, and effectively preventing grease overflow from the gearbox 2 from contaminating the farmland.

[0022] The gearbox 2 includes a main housing 21, a lower housing 22 disposed at the lower end of the main housing 21, and a rear housing 23 disposed at one end of the main housing 21. The motor 4 is installed at the other end of the main housing 21, and the oil return hole 202 is connected to the lower housing 22.

[0023] The end of the main housing 21 is provided with a sink 21A, which cooperates with the motor 4 to form an exhaust chamber 20, wherein the exhaust screw 201 and the oil return hole 202 are located at the upper end and the lower end of the sink 21A, respectively.

[0024] The gearbox 2 is mounted on the mounting frame 1 via a shock-absorbing mechanism 3. The shock-absorbing mechanism 3 includes a connecting bracket 31 mounted on the gearbox 2, multiple shock-absorbing brackets 32 mounted on the mounting frame 1 to support the connecting bracket 31, at least one shock-absorbing rubber 33 mounted on the shock-absorbing bracket 32 ​​to support the connecting bracket 31, a first bolt group 34 connecting the connecting bracket 31, the shock-absorbing rubber 33, and the shock-absorbing bracket 32, and a second bolt group 35 fixing the shock-absorbing bracket 32 ​​to the mounting frame 1. By using the shock-absorbing mechanism 3 on the mounting frame 1 to support the gearbox 2, the vibration transmission between the mounting frame 1 and the gearbox 2 is reduced, enabling the rotary tiller to operate stably and extending its service life. Furthermore, the shock-absorbing rubber 33 is placed between the connecting bracket 31 and the shock-absorbing bracket 32 ​​to reduce wear during rotary tiller vibrations. The first bolt group 34 connects the bracket 31 and the shock-absorbing bracket 32 ​​in series, allowing for quick replacement of the shock-absorbing rubber 33 and long-term protection of the shock-absorbing effect.

[0025] The shock-absorbing bracket 32 ​​is provided with a positioning ring 36 for being fitted around the shock-absorbing rubber 33. By using the positioning ring 36 on the shock-absorbing bracket 32 ​​to fit around the shock-absorbing rubber 33, the positioning ring 36 holds and limits the shock-absorbing rubber 33, preventing the shock-absorbing rubber 33 from being directly flattened by the connecting bracket 31 and losing its cushioning effect, thereby improving the lifespan of the shock-absorbing rubber 33.

[0026] The shock absorber bracket 32 ​​is arched and fixed to the mounting bracket 1 on both sides by the second bolt group 35. The shock absorber rubber 33 is installed in the middle of the shock absorber bracket 32. By setting the shock absorber bracket 32 ​​as an arched structure, the shock absorber bracket 32 ​​has both a certain supporting strength and a certain elastic force, so as to avoid the shock absorber rubber 33 failing and causing rigid impact when the bump amplitude is too large.

[0027] The middle part of the shock absorber bracket 32 ​​is bent downward to form a baffle portion 321. The baffle portion 321 is used to limit and support the shock absorber bracket 32, so as to prevent the shock absorber bracket 32 ​​from being deformed due to excessive force and thus improve the compressive strength of the shock absorber bracket 32.

[0028] Both sides of the shock-absorbing bracket 32 ​​are equipped with shock-absorbing rubber 33, and a steel sleeve 340 is fitted onto the first bolt group 34, penetrating the middle of the two shock-absorbing rubber 33. The inner side of the shock-absorbing bracket 32 ​​is provided with a nut washer 38 that cooperates with the first bolt group 34 to lock the two shock-absorbing rubber 33.

[0029] Both sides of the gearbox 2 are equipped with connecting brackets 31. Four shock-absorbing brackets 32 are arranged in a matrix on the mounting frame 1 and distributed below the connecting brackets 31 on both sides of the gearbox 2.

[0030] The mounting bracket 1 has a mounting hole in the middle for mounting the gearbox 2. The connecting bracket 31 is installed on both sides of the main housing 21 by the third bolt group 37 and presses against the shock-absorbing rubber 33, suspending and supporting the gearbox 2 in the mounting hole.

[0031] In summary, this invention, by providing an exhaust chamber 20 at the connection between the gearbox 2 and the motor 4, allows the high-speed operation of the gearbox 2 to vaporize the lubricating grease, which then rises into the exhaust chamber 20 and collects. The high-temperature gas is discharged through the exhaust screw 201 at the upper end of the exhaust chamber 20. Upon entering the exhaust chamber 20, the high-temperature gas condenses due to the temperature drop, preventing the grease from flowing out of the exhaust screw 201 with the gas. The condensed lubricating grease collects along the inner wall of the exhaust chamber 20 and flows back into the gearbox 2 through the oil return hole 202 at the lower end, thus achieving the recycling of the lubricating grease and reducing its loss. Furthermore, by providing an exhaust chamber 20 between the gearbox 2 and the motor 4 for isolation, heat insulation is achieved, preventing high-temperature transmission between the gearbox 2 and the motor 4 and improving the service life of both the gearbox 2 and the motor 4.

[0032] Of course, the above description is only a specific embodiment of the present utility model and is not intended to limit the scope of the present utility model. All equivalent changes or modifications made to the structure, features and principles described in the claims of the present utility model should be included in the scope of the claims of the present utility model.

Claims

1. A leak-proof breathing structure for an electric rotary tiller gearbox, comprising a gearbox (2) and a motor (4) mounted on one end of the gearbox (2), characterized in that: One end of the gearbox (2) is provided with an exhaust chamber (20) that connects to the inner cavity of the gearbox (2). The top of the exhaust chamber (20) is provided with an exhaust screw (201), and the bottom of the exhaust chamber (20) is provided with an oil return hole (202) connecting to the inner cavity of the gearbox (2).

2. The oil-leakage-proof breathing structure of an electric rotary tiller gearbox according to claim 1, characterized in that: The gearbox (2) includes a main housing (21), a lower housing (22) located at the lower end of the main housing (21), and a rear housing (23) located at one end of the main housing (21). The motor (4) is installed at the other end of the main housing (21), and the oil return hole (202) is connected to the lower housing (22).

3. The oil-leakage-proof breathing structure of an electric rotary tiller gearbox according to claim 2, characterized in that: The end of the main housing (21) is provided with a sink (21A) which cooperates with the motor (4) to form an exhaust chamber (20), wherein the exhaust screw (201) and the oil return hole (202) are located at the upper end and the lower end of the sink (21A), respectively.

4. The oil-leakage-proof breathing structure for an electric rotary tiller gearbox according to claim 2, characterized in that: The main housing (21) is provided with connecting brackets (31) on both sides for connecting and installing with the mounting frame (1). The mounting frame (1) is provided with shock-absorbing brackets (32) for installing the connecting brackets (31), and shock-absorbing adhesive (33) is provided between the shock-absorbing brackets (32) and the connecting brackets (31).

5. The oil-leakage-proof breathing structure for an electric rotary tiller gearbox according to claim 4, characterized in that: The shock absorber bracket (32) is provided with a positioning ring (36) for fitting the positioning shock absorber rubber (33).

6. The oil-leakage-proof breathing structure for an electric rotary tiller gearbox according to claim 4, characterized in that: The shock-absorbing bracket (32) is provided with shock-absorbing rubber (33) on both the upper and lower sides, and the connecting bracket (31), the shock-absorbing bracket (32), and the shock-absorbing rubber (33) are connected in series and fixed by the first bolt group (34).

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