Pressure relief protection mechanism of gearbox

Abstract

The utility model relates to the technical field of gear box pressure relief, in particular to a pressure relief protection mechanism of a gear box, which comprises a gear box body, a connecting pipe orifice and a protective cover, the connecting pipe orifice is fixed on the outer side of the gear box body, the protective cover is connected above the connecting pipe orifice, and pressure relief protection is provided for the gear box body through the protective cover. A mounting head is fixed to the lower portion of the protective cover, the mounting head is in threaded connection with the connecting pipe opening, so that the protective cover can be disassembled and assembled, a communicating opening is formed in the mounting head, and the upper portion of the communicating opening is communicated with the interior of the protective cover. According to the pressure relief protection mechanism of the gear box, pressure in the gear box body can be collected and stored through the protection cover, oil gas waste is avoided, and when the temperature in the gear box body is reduced and the air pressure is recovered subsequently, oil gas in the protection cover can be sent back to the interior of the gear box body under the action of external air pressure and the sealing plug.

Description

Technical Field

[0001] The utility model relates to the technical field of gear box pressure relief, in particular to a gear box pressure relief protection mechanism. Background Art

[0002] As a common mechanical speed transmission mechanism, the gearbox realizes speed control through internal gear transmission meshing, adjusts the output torque, and makes the power adapt to its use environment. The gearbox is filled with lubricating oil to lubricate the gears to ensure its operating stability. However, as the temperature in the gearbox rises, its pressure will gradually increase. The application number is CN202223436358.8, and a pressure relief device for a micro-tiller's gearbox disclosed on August 15, 2023, includes a main body provided with a ventilation cavity, the lower part of the main body has a connecting part, and the upper part of the main body is connected to a cover, and a filter is arranged in the ventilation cavity of the main body, and the filter element is a powder metallurgy part obtained by powder sintering metallurgy, and the filter element has a plurality of micropores through which gas can pass, and the diameter of the micropores is 10 to 25 microns. Through the above technical scheme, the utility model provides a pressure relief device for a gear box of a micro-tiller, which is connected to the gear box through a connecting portion at the lower part of the main body. The filter element of the utility model is a powder metallurgy element obtained by powder sintering metallurgy. The filter element has a plurality of micropores through which gas can pass, so that gas can pass better to ensure the balance of gas pressure inside and outside the gear box. By setting the micropores to a structure with a diameter of 10 to 25 microns, the oil in the gear box can be effectively isolated to prevent the oil from leaking from the pressure relief device.

[0003] The current gearbox pressure relief protection mechanism uses a one-way pressure relief valve and other structures directly installed on the gearbox to achieve overpressure protection. Although this method can achieve pressure relief for the gearbox, the oil and gas discharged during pressure relief directly dissipate into the air, which will also cause waste of oil in the gearbox. In addition, the temperature and air pressure inside the gearbox will drop later, and the internal air pressure will decrease, making it difficult to actively restore. Utility Model Content

[0004] The utility model aims to provide a pressure relief protection mechanism for a gear box to solve the problem that the current pressure relief protection mechanism for a gear box proposed in the above background technology adopts a one-way pressure relief valve and other structures directly installed on the gear box to achieve overpressure protection effect. Although this method can achieve pressure relief for the gear box, the oil and gas discharged during pressure relief are directly dissipated into the air, which will also cause waste of oil in the gear box, and the temperature and pressure inside the gear box will drop later, and the internal air pressure will be difficult to actively restore.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a pressure relief protection mechanism of a gear box, comprising a gear box body, a connecting pipe mouth and a protective cover, a connecting pipe mouth is fixed on the outer side of the gear box body, and a protective cover is connected above the connecting pipe mouth, and pressure relief protection is provided for the gear box body through the protective cover, a mounting head is fixed below the protective cover, and a threaded connection is formed between the mounting head and the connecting pipe mouth, so that the protective cover can be disassembled and installed, a connecting port is opened inside the mounting head, and the upper part of the connecting port is connected to the inside of the protective cover, and two groups of connecting ports are arranged in the mounting head, A first connecting pipe and a second connecting pipe are respectively provided inside the two groups of connecting ports, and a one-way conducting mechanism is provided inside the first connecting pipe and inside the second connecting pipe. The conducting direction of the one-way conducting mechanism in the first connecting pipe is from the outside of the mounting head to the inside of the protective cover, and the conducting direction of the one-way conducting mechanism in the second connecting pipe is from the outside of the mounting head inside the protective cover. A sealing plug is provided inside the protective cover, and the upper part of the connecting port is blocked by the sealing plug. An up-and-down sliding structure is formed between the sealing plug and the protective cover, and the oil and gas discharged from the gear box body are collected by the movement of the sealing plug.

[0006] To further optimize the technical solution, a sealing gasket is fixed below the protective cover, and the sealing gasket is designed in an annular structure to increase the tightness of the connection between the mounting head and the connecting pipe mouth.

[0007] To further optimize the technical solution, an auxiliary block is fixed to the outer side of the protective cover, and rotation control is provided for the protective cover through the auxiliary block.

[0008] To further optimize the technical solution, a guide rod is fixed above the sealing plug, and a fixing plate passes through the upper end of the guide rod, and the fixing plate is fixed above the protective cover, and a limited pressure protection mechanism is provided above the protective cover.

[0009] To further optimize the technical solution, the pressure limiting protection mechanism includes a pressure relief pipe, a push plate and a first spring;

[0010] A pressure relief pipe is fixed on the outside of the protective cover;

[0011] A push plate, arranged below the fixed plate;

[0012] The first spring is fixed above the push plate, and the upper end of the first spring is connected to the fixed plate.

[0013] Further optimizing the technical solution, the one-way conduction mechanism includes a mounting plate, a through groove, a blocking block, a second spring and a support plate;

[0014] A mounting plate fixed inside the first communicating pipe and the second communicating pipe;

[0015] A through slot is provided in the middle of the mounting plate;

[0016] A blocking block is arranged on the outer side of the through groove to block the through groove;

[0017] A second spring is connected to the blocking block and provides thrust for the blocking block;

[0018] The support plate is connected to the second spring to provide support therefor.

[0019] To further optimize the technical solution, a control head is fixed below the first connecting tube and the second connecting tube, and the bottom of the control head is designed as an inwardly concave structure, and the first connecting tube and the second connecting tube are both threadedly connected to the connecting port.

[0020] Compared with the prior art, the beneficial effects of the utility model are:

[0021] The protective cover can be conveniently installed on the gearbox body for use through the detachable connection between the mounting head and the connecting pipe mouth. Subsequent replacement and removal are also convenient and flexible to use. The auxiliary block can assist the rotation of the protective cover.

[0022] The pressure inside the gearbox body can be collected and stored through the protective cover to avoid waste of oil and gas. When the temperature inside the gearbox body drops and the air pressure is restored, the oil and gas in the protective cover can be sent back to the inside of the gearbox body under the action of the external air pressure and the sealing plug, so that the air pressure inside the gearbox body can be automatically restored, and waste and pollution caused by oil and gas leakage can be avoided;

[0023] The pressure relief pipe provided on the protective cover can discharge the air pressure in the protective cover to the outside when the protective cover reaches the maximum collection state, thereby avoiding the damage of the protective cover caused by the continuous increase of the air pressure in the protective cover, and also ensuring the safety of the air pressure in the protective cover. When the air pressure is restored to the air pressure that the protective cover can withstand, the push plate can push the sealing plug to move and close the pressure relief pipe, thereby improving its use safety.

[0024] By setting two sets of one-way conduction mechanisms in opposite directions, the air intake and exhaust in the protective cover can be realized, so that the air pressure in the protective cover can be exchanged with the air in the gear box body, which is convenient for maintaining the stability of the air pressure in the subsequent gear box body;

[0025] The one-way conduction mechanism can be installed through the first connecting tube and the second connecting tube in cooperation with the control head. When it is damaged, it can be removed from the installation head and replaced, so there is no need to replace the entire mechanism, saving costs. It can also be used by replacing one-way conduction mechanisms with different pressure resistance to adapt to different usage needs and increase its functionality. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0027] Figure 2 This is a schematic diagram of the three-dimensional structure of the protective cover of the utility model;

[0028] Figure 3 This is a schematic diagram of the main cross-sectional structure of the protective cover of the utility model;

[0029] Figure 4 This is a schematic diagram of the upward movement structure of the sealing plug of the utility model;

[0030] Figure 5 This is a schematic diagram of the main cross-sectional structure of the installation head of the utility model;

[0031] Figure 6 It is a schematic diagram of the three-dimensional structure of the first connecting pipe of the utility model.

[0032] In the figure: 1. gearbox body; 2. connecting pipe mouth; 3. protective cover; 4. mounting head; 5. auxiliary block; 6. sealing gasket; 7. connecting port; 8. sealing plug; 9. guide rod; 10. fixing plate; 11. pressure relief pipe; 12. push plate; 13. first spring; 14. first connecting pipe; 15. second connecting pipe; 16. control head; 17. mounting plate; 18. through groove; 19. blocking block; 20. second spring; 21. support plate. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0034] See also Figure 1-Figure 6 The utility model provides the following technical solutions: a pressure relief protection mechanism for a gearbox, comprising a gearbox body 1, a connecting pipe port 2 and a protective cover 3, the connecting pipe port 2 is fixed to the outside of the gearbox body 1, and the protective cover 3 is connected above the connecting pipe port 2, and the protective cover 3 provides pressure relief protection for the gearbox body 1;

[0035] Embodiment 1: The utility model provides a technical solution, which discloses that a mounting head 4 is fixed below the protective cover 3, and a threaded connection is formed between the mounting head 4 and the connecting pipe mouth 2, so that the protective cover 3 can be disassembled and installed, and a connecting port 7 is opened inside the mounting head 4, and the upper part of the connecting port 7 is connected to the inside of the protective cover 3, and the connecting port 7 is provided with two groups in the mounting head 4, and the insides of the two groups of connecting ports 7 are respectively provided with a first connecting pipe 14 and a second connecting pipe 15, and the inside of the first connecting pipe 14 and the inside of the second connecting pipe 15 are both provided with a one-way conduction mechanism, and the conduction direction of the one-way conduction mechanism in the first connecting pipe 14 is from the mounting head 4 is conducted from the outside to the inside of the protective cover 3, and the conducting direction of the unidirectional conducting mechanism in the second connecting pipe 15 is conducted from the inside of the protective cover 3 to the outside of the mounting head 4. A sealing plug 8 is arranged inside the protective cover 3, and the upper part of the communicating port 7 is blocked by the sealing plug 8, and an up-and-down sliding structure is formed between the sealing plug 8 and the protective cover 3, and the oil and gas discharged from the gear box body 1 are collected by the movement of the sealing plug 8. A sealing gasket 6 is fixed below the protective cover 3, and the sealing gasket 6 is designed in an annular structure to increase the connection tightness between the mounting head 4 and the connecting pipe mouth 2. An auxiliary block 5 is fixed on the outside of the protective cover 3, and the auxiliary block 5 provides rotation control for the protective cover 3;

[0036] When in use, the protective cover 3 can be installed on the connecting pipe port 2 on the gear box body 1 through the mounting head 4 for use. The protective cover 3 can be rotated through the auxiliary block 5 so that the mounting head 4 is connected to the connecting pipe port 2 through the thread. When the pressure in the gear box body 1 increases subsequently, the oil and gas can enter the protective cover 3 through the one-way conduction mechanism in the first connecting pipe 14 and push the sealing plug 8 upward. When the air pressure in the gear box body 1 is restored subsequently, the oil and gas in the protective cover 3 can return to the interior of the gear box body 1 through the one-way conduction mechanism in the second connecting pipe 15, thereby reducing the waste of oil and gas and the pollution to the external environment.

[0037] Embodiment 2: Based on Embodiment 1, a guide rod 9 is fixed on the top of the sealing plug 8, and a fixing plate 10 is passed through the upper end of the guide rod 9, and the fixing plate 10 is fixed on the top of the protective cover 3, and a limited pressure protection mechanism is arranged on the top of the protective cover 3, and the pressure limiting protection mechanism includes a pressure relief pipe 11, a push plate 12 and a first spring 13, the pressure relief pipe 11 is fixed on the outside of the protective cover 3, the push plate 12 is arranged below the fixing plate 10, the first spring 13 is fixed on the top of the push plate 12, and the upper end of the first spring 13 is connected to the fixing plate 10;

[0038] When the pressure in the protective cover 3 continues to increase, the sealing plug 8 continues to move upward. When the sealing plug 8 moves to the maximum moving distance, the sealing plug 8 will squeeze the first spring 13 upward through the push plate 12. At the same time, the sealing plug 8 moves to the top of the pressure relief pipe 11, and the pressure in the protective cover 3 will be discharged outward through the pressure relief pipe 11. When the air pressure in the protective cover 3 returns to its tolerable pressure range, the first spring 13 pushes the push plate 12 and the sealing plug 8 to move downward, and the pressure relief pipe 11 is blocked, thereby improving the safety of the protective cover 3.

[0039] Embodiment 3: On the basis of embodiment 1, a one-way conduction mechanism is disclosed, which includes a mounting plate 17, a through groove 18, a blocking block 19, a second spring 20 and a support plate 21. The mounting plate 17 is fixed inside the first connecting tube 14 and the second connecting tube 15. The through groove 18 is provided in the middle of the mounting plate 17. The blocking block 19 is arranged on the outer side of the through groove 18 to block the through groove 18. The second spring 20 is connected to the blocking block 19 to provide thrust for the blocking block 19. The support plate 21 is connected to the second spring 20 to provide support therefor. The control head 16 is fixed below the first connecting tube 14 and the second connecting tube 15, and the lower part of the control head 16 is designed as an inward concave structure. The first connecting tube 14 and the second connecting tube 15 are both threadedly connected to the connecting port 7.

[0040] The blocking block 19 can be controlled to move by pressure, thereby controlling the opening and closing of the through groove 18, so that the oil and gas in the gear box body 1 and the protective cover 3 can be exchanged and moved, and the first connecting pipe 14 and the second connecting pipe 15 can be disassembled, repaired and replaced. When disassembling, the protective cover 3 can be removed from the connecting pipe port 2 first, and then the control head 16 and the first connecting pipe 14 or the second connecting pipe 15 can be controlled to rotate by inserting an inner hexagonal wrench into the control head 16, so as to release the threaded connection between it and the connecting port 7.

[0041] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0042] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A pressure relief protection mechanism for a gearbox, comprising a gearbox body (1), a connecting pipe opening (2) and a protective cover (3), wherein the connecting pipe opening (2) is fixed to the outside of the gearbox body (1), and the protective cover (3) is connected above the connecting pipe opening (2), and the protective cover (3) provides pressure relief protection for the gearbox body (1); Its characteristics are: A mounting head (4) is fixed below the protective cover (3), and a threaded connection is formed between the mounting head (4) and the connecting pipe port (2), so that the protective cover (3) can be disassembled and installed. A connecting port (7) is provided inside the mounting head (4), and the top of the connecting port (7) is connected to the interior of the protective cover (3). There are two groups of connecting ports (7) in the mounting head (4), and the interiors of the two groups of connecting ports (7) are respectively provided with a first connecting pipe (14) and a second connecting pipe (15). The interiors of the first connecting pipe (14) and the interiors of the second connecting pipe (15) are both provided with A one-way conducting mechanism is provided. The conducting direction of the one-way conducting mechanism in the first connecting pipe (14) is from the outside of the mounting head (4) to the inside of the protective cover (3). The conducting direction of the one-way conducting mechanism in the second connecting pipe (15) is from the inside of the protective cover (3) to the outside of the mounting head (4). A sealing plug (8) is provided inside the protective cover (3). The upper part of the connecting port (7) is blocked by the sealing plug (8). An up-and-down sliding structure is formed between the sealing plug (8) and the protective cover (3). The oil and gas discharged from the gear box body (1) are collected by the movement of the sealing plug (8).

2. The pressure relief protection mechanism of a gear box according to claim 1, characterized in that: A sealing gasket (6) is fixed below the protective cover (3), and the sealing gasket (6) is designed in an annular structure to increase the tightness of the connection between the mounting head (4) and the connecting pipe mouth (2).

3. A gearbox pressure relief protection mechanism according to claim 1 or 2, characterized in that: An auxiliary block (5) is fixed to the outside of the protective cover (3), and rotation control is provided for the protective cover (3) via the auxiliary block (5).

4. The pressure relief protection mechanism of a gear box according to claim 1, characterized in that: A guide rod (9) is fixed above the sealing plug (8), and a fixing plate (10) passes through the upper end of the guide rod (9), and the fixing plate (10) is fixed above the protective cover (3). A pressure limiting protection mechanism is provided above the protective cover (3).

5. The pressure relief protection mechanism of a gear box according to claim 4, characterized in that: The pressure limiting protection mechanism comprises a pressure relief pipe (11), a push plate (12) and a first spring (13); A pressure relief pipe (11) is fixed to the outside of the protective cover (3); A push plate (12) is provided below the fixed plate (10); The first spring (13) is fixed above the push plate (12), and the upper end of the first spring (13) is connected to the fixed plate (10).

6. The pressure relief protection mechanism of a gear box according to claim 1, characterized in that: The one-way conduction mechanism comprises a mounting plate (17), a through groove (18), a blocking block (19), a second spring (20) and a support plate (21); A mounting plate (17) fixed inside the first connecting pipe (14) and the second connecting pipe (15); A through groove (18) is provided in the middle of the mounting plate (17); A blocking block (19) is arranged outside the through groove (18) to block the through groove (18); A second spring (20) is connected to the blocking block (19) to provide thrust for the blocking block (19); The support plate (21) is connected to the second spring (20) to provide support therefor.

7. A gearbox pressure relief protection mechanism according to claim 1 or 6, characterized in that: A control head (16) is fixed below each of the first connecting tube (14) and the second connecting tube (15), and the lower portion of the control head (16) is designed to have an inwardly concave structure. Threaded connections are formed between the first connecting tube (14) and the second connecting tube (15) and the connecting port (7).

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