Worm reducer

Abstract

The utility model discloses a worm speed reducer, and relates to the technical field of worm speed reducers, the worm speed reducer comprises a shell, a worm gear and a worm are rotatably connected in the shell, the worm gear is meshed with the worm, the shell is provided with a containing cavity used for installing the worm gear and the worm, an air bag is installed in the shell, and the air bag is provided with an air inlet. And the air bag is connected with a pressure relief screw plug communicated with the outside. When the worm speed reducer works, high-temperature friction can generate a large amount of heat, the temperature in the containing cavity rises, gas in the containing cavity expands, the air bag shrinks, the gas in the air bag is discharged out of the air bag through the pressure relief screw plug, pressure in the worm speed reducer is released, and therefore gas pollutants are prevented from being discharged out of the containing cavity; the external environment is protected, and the balance between the internal pressure of the worm reducer and the outdoor pressure can be guaranteed. After the worm speed reducer stops working, the temperature in the containing cavity is reduced, outdoor air enters the air bag through the pressure relief screw plug, the air bag is restored, and next operation is facilitated.

Description

Technical Field

[0001] The present application relates to the technical field of worm reducers, and in particular to a worm reducer. Background Art

[0002] As a key mechanical transmission device, worm reducers play an important role in industrial manufacturing, transportation, medical equipment and other fields. However, when it is used in food processing and pharmaceutical industries, it faces specific challenges. These industries have extremely high requirements for hygiene and cleanliness. The heat generated by the worm reducer during operation can cause oxidation and deterioration of the lubricating oil, and the traditional breathable plug design may cause the deteriorated lubricating oil vapor to escape into the surrounding environment, causing potential pollution risks, which needs to be improved. Utility Model Content

[0003] The purpose of the present application is to provide a worm reducer to prevent the external discharge of pollutant gases inside the reducer.

[0004] A worm reducer provided in the present application adopts the following technical solution: it includes a housing, in which a worm wheel and a worm are rotatably connected, the worm wheel is meshed with the worm, the housing is provided with a accommodating cavity for installing the worm wheel and the worm, an air bag is installed in the housing, and the air bag is connected to a pressure relief screw plug connected to the outside.

[0005] By adopting the above technical solution, when the worm reducer is working, high-temperature friction will generate a large amount of heat, which will increase the temperature in the accommodating chamber, expand the gas in the accommodating chamber, and shrink the airbag. The gas in the airbag will be discharged from the airbag through the pressure relief screw plug, and the pressure in the worm reducer will be released, thereby preventing gas pollutants from being discharged from the accommodating chamber, protecting the external environment, and meeting the requirements of a high-cleanliness use environment. It can also ensure that the internal pressure of the worm reducer is balanced with the outdoor pressure. After the worm reducer stops working, the temperature in the accommodating chamber decreases, and the outdoor gas enters the airbag through the pressure relief screw plug, and the airbag recovers, which is convenient for the next operation.

[0006] Optionally, the shell is provided with a mounting groove for the airbag to be inserted, the mounting groove is communicated with the accommodating cavity, the shell is connected with a pressure plate for covering the mounting groove, the pressure plate is connected to the shell through a locking member, the pressure relief screw is connected to the pressure plate, and when the pressure plate is installed on the shell, the airbag is clamped by the pressure plate and the shell.

[0007] By adopting the above technical solution, when the airbag is clamped by the pressure plate and the shell, the airbag is compressed to produce elastic deformation and maintain a tendency of elastic restoration. The airbag is pressed against the side facing the pressure plate and the shell to improve the sealing performance, thereby reducing the discharge of gaseous pollutants from the gap between the sealing plate and the shell.

[0008] Optionally, the airbag is provided with wavy creases.

[0009] By adopting the above technical solution, when the airbag is compressed, the creases facilitate the telescoping of the airbag. The creases can serve as strengthening elements of the structure, improving the stability and durability of the airbag during the folding and unfolding processes.

[0010] Optionally, it further includes an input flange connected to the housing. The input flange is connected to the housing through a mounting member. The input flange is connected with a first seal for sealing the gap between the worm and the input flange and a second seal for sealing the gap between the housing and the input flange.

[0011] By adopting the above technical solution, the first seal seals the gap between the worm and the input flange, and the second seal seals the gap between the housing and the input flange, improving the sealing performance, thereby reducing the discharge of gas pollutants from the gaps between the worm and the flange and between the housing and the input flange.

[0012] Optionally, the input flange is provided with a limiting groove for the second seal to snap into.

[0013] By adopting the above technical solution, the second seal snaps into the limiting groove, and the outer surface of the second seal fits against the inner wall of the limiting groove. The inner wall of the limiting groove restricts the movement of the second seal, thereby improving the stability of the second seal installed on the input flange. The cooperation between the second seal and the inner wall of the limiting groove increases the gas flow path, thereby reducing the discharge of gas pollutants from the gap between the worm and the flange.

[0014] Optionally, both ends of the worm are connected with first bearings. The housing is provided with a first groove for one of the first bearings to snap into. The first groove communicates with the accommodating cavity. When the input flange is installed on the housing, the input flange abuts against the other first bearing.

[0015] By adopting the above technical solution, the first bearing snaps into the first groove, and the input flange is installed on the housing, restricting the movement of the worm and the two first bearings, and improving the stability of the worm rotation.

[0016] Optionally, a third seal for sealing the gap between the housing and the worm gear is connected between the housing and the worm gear.

[0017] By adopting the above technical solution, the third seal seals the gap between the housing and the worm gear, improving the sealing performance, thereby reducing the discharge of gas pollutants from the gap between the housing and the worm gear.

[0018] Optionally, the housing is connected with an end cover, the end cover and the housing are connected by fixing parts, the third seal is also used for sealing the gap between the end cover and the worm gear, and the end cover is connected with a fourth seal for sealing the gap between the end cover and the housing.

[0019] By adopting the above technical solution, when installing the worm gear, first install the worm gear in the housing, and then install the end cover on the housing through the fixing parts, providing space for the installation of the worm gear. The third seal seals the gap between the end cover and the worm gear, and the fourth seal seals the gap between the end cover and the housing, improving the sealing performance, thereby reducing the discharge of gas pollutants from the gap between the end cover and the worm gear and the gap between the end cover and the housing.

[0020] Optionally, the housing is provided with a positioning groove for cooperating with the end cover.

[0021] By adopting the above technical solution, when the end cover is installed in the positioning groove, the outer surface of the end cover fits with the inner wall of the positioning groove, and the inner wall of the positioning groove plays a role in positioning the end cover, facilitating the installation of the end cover on the housing through the fixing parts.

[0022] Optionally, both ends of the worm gear are connected with second bearings, and both the housing and the end cover are provided with second grooves for the corresponding second bearings to be inserted into.

[0023] By adopting the above technical solution, when the two second bearings are inserted into the corresponding second grooves, the housing and the end cover play a role in restricting the movement of the worm gear and the two second bearings, thereby improving the stability of the rotation of the worm gear.

[0024] In summary, the present application includes at least one of the following beneficial technical effects:

[0025] 1. When the worm reducer works, a large amount of heat will be generated due to high-temperature friction, causing the temperature in the accommodation cavity to rise. The gas in the accommodation cavity expands, causing the airbag to contract. The gas in the airbag is discharged from the airbag through the pressure relief plug, and the pressure in the worm reducer is released, thereby preventing gas pollutants from being discharged from the accommodation cavity, protecting the external environment, and ensuring the balance between the internal pressure of the worm reducer and the outdoor pressure. After the worm reducer stops working, the temperature in the accommodation cavity decreases, and the outdoor gas enters the airbag through the pressure relief plug, and the airbag is restored, facilitating the next operation.

[0026] 2. When the airbag is clamped by the pressing plate and the housing, the airbag is compressed to produce elastic deformation and maintains a tendency of elastic reset. The airbag abuts against the side facing the pressing plate and the housing, improving the sealing performance, thereby reducing the discharge of gas pollutants from the gap between the sealing pressing plate and the housing. Description of the Drawings

[0027] Figure 1is one of the cross-sectional views of the embodiment of the present application, showing the input flange.

[0028] Figure 2 is Figure 1 an enlarged view of area A of

[0029] Figure 3 is the second cross-sectional view of the embodiment of the present application, showing the end cover.

[0030] Figure 4 is Figure 3 an enlarged view of area B of

[0031] Figure 5 is the usage state diagram of the embodiment of the present application.

[0032] Explanation of reference numerals: 1, housing; 11, accommodation cavity; 12, installation groove; 13, air flow channel; 14, first groove; 15, positioning groove; 16, second groove; 2, worm gear; 21, second bearing; 3, worm; 31, first bearing; 4, airbag; 41, crease; 5, pressing plate; 51, locking member; 52, pressure relief plug; 6, input flange; 61, installation member; 62, first seal; 63, second seal; 64, limiting groove; 7, end cover; 71, third seal; 72, fourth seal. Detailed description of the specific implementation

[0033] The following will Figure 1 - with reference to the Figure 5 drawings to further elaborate on the present application.

[0034] The embodiment of the present application discloses a worm reducer.

[0035] As Figure 1 shown, it includes a housing 1, the housing 1 is made of stainless steel material, a worm gear 2 and a worm 3 are rotatably connected inside the housing 1, the worm gear 2 meshes with the worm 3, and the housing 1 is provided with an accommodation cavity 11 for installing the worm gear 2 and the worm 3. An airbag 4 is installed at the upper end of the housing 1, and the airbag 4 is provided with a wave-shaped crease 41. The housing 1 is provided with an installation groove 12 for the airbag 4 to snap into, the housing 1 is provided with an air flow channel 13, both the accommodation cavity 11 and the installation groove 12 are communicated with the air flow channel 13, and the air flow channel 13 is located between the accommodation cavity 11 and the installation groove 12. The housing 1 is detachably connected with a pressing plate 5 for covering the installation groove 12, the pressing plate 5 and the housing 1 are connected by a plurality of locking members 51, and the locking members 51 are bolts. When the pressing plate 5 is installed on the housing 1, the airbag 4 is clamped by the pressing plate 5 and the housing 1, and the pressing plate 5 is connected with a pressure relief plug 52 communicated with the outside.

[0036] Combined with Figure 1 and Figure 2As shown, both ends of the worm 3 are fixedly connected with first bearings 31. The housing 1 is provided with a first groove 14 for one of the first bearings 31 to be inserted into, and the first groove 14 communicates with the accommodation cavity 11. One side of the housing 1 is detachably connected with an input flange 6 for abutting against the other first bearing 31. The input flange 6 and the housing 1 are connected by a plurality of mounting members 61, and the mounting members 61 are bolts. A first seal 62 for sealing the gap between the worm 3 and the input flange 6 is installed between the input flange 6 and the worm 3, and the first seal 62 is an oil seal. The input flange 6 is connected with a second seal 63 for sealing the gap between the housing 1 and the input flange 6. The second seal 63 is a sealing ring, and a limiting groove 64 for the second seal 63 to be inserted into is formed on the outer peripheral surface of the input flange 6.

[0037] Combined with Figure 3 and Figure 4 As shown, the housing 1 is detachably connected with an end cover 7. The end cover 7 and the housing 1 are connected by a plurality of fixing members (not shown in the drawings). Third seals 71 are connected between the housing 1 and the worm gear 2 and between the end cover 7 and the worm gear 2, and the third seals 71 are oil seals. The number of the third seals 71 is two. One of the third seals 71 seals the gap between the housing 1 and the worm gear 2, and the other third seal 71 seals the gap between the end cover 7 and the worm gear 2. The end cover 7 is connected with a fourth seal 72 for sealing the gap between the end cover 7 and the housing 1. The fourth seal 72 is a sealing ring, and a ring groove for the fourth seal 72 to be inserted into is formed on the outer peripheral surface of the end cover 7. The housing 1 is provided with a positioning groove 15 for cooperating with the end cover 7, and the positioning groove 15 communicates with the accommodation cavity 11. Both ends of the worm gear 2 are fixedly connected with second bearings 21, and the housing 1 and the end cover 7 are both provided with second grooves 16 for the corresponding second bearings 21 to be inserted into.

[0038] The implementation principle of a worm reducer in an embodiment of the present application is as follows:

[0039] As Figure 5 shown, when the worm reducer works, a large amount of heat will be generated due to high-temperature friction, causing the temperature in the accommodation cavity 11 to rise. The gas in the accommodation cavity 11 expands, causing the airbag 4 to be compressed and contracted. The gas in the airbag 4 is discharged from the airbag 4 through the pressure relief plug 52, and the pressure inside the worm reducer is released, thereby preventing gas pollutants from being discharged from the accommodation cavity 11, playing a role in protecting the external environment, and also ensuring the balance between the internal pressure of the worm reducer and the outdoor pressure. After the worm reducer stops working, the temperature in the accommodation cavity 11 drops, and the outdoor gas enters the airbag 4 through the pressure relief plug 52, and the airbag 4 resumes its original state, facilitating the next operation.

[0040] The above are all the preferred embodiments of the present application. The protection scope of the present application is not limited by this. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A worm reducer, characterized in that: It includes a housing (1), a worm gear (2) and a worm (3) are rotatably connected inside the housing (1), the worm gear (2) meshes with the worm (3), the housing (1) is provided with a receiving cavity (11) for installing the worm gear (2) and the worm (3), an airbag (4) is installed inside the housing (1), and the airbag (4) is connected with a pressure relief plug (52) communicating with the outside.

2. The worm reducer according to claim 1, characterized in that: The housing (1) is provided with an installation groove (12) for the airbag (4) to be snapped into, the installation groove (12) communicates with the receiving cavity (11), the housing (1) is connected with a pressing plate (5) for covering the installation groove (12), the pressing plate (5) is connected with the housing (1) through a locking member (51), the pressure relief plug (52) is connected with the pressing plate (5), and when the pressing plate (5) is installed on the housing (1), the airbag (4) is clamped by the pressing plate (5) and the housing (1).

3. The worm reducer according to claim 1, wherein: The airbag (4) is provided with a wavy crease (41).

4. The worm reducer according to claim 1, characterized in that: It also includes an input flange (6) connected to the housing (1), the input flange (6) is connected with the housing (1) through an installation member (61), the input flange (6) is connected with a first seal (62) for sealing the gap between the worm (3) and the input flange (6) and a second seal (63) for sealing the gap between the housing (1) and the input flange (6).

5. The worm reducer according to claim 4, characterized in that: The input flange (6) is provided with a limiting groove (64) for the second seal (63) to be snapped into.

6. The worm reducer according to claim 4, characterized in that: Both ends of the worm (3) are connected with a first bearing (31), the housing (1) is provided with a first groove (14) for one of the first bearings (31) to be snapped into, the first groove (14) communicates with the receiving cavity (11), and when the input flange (6) is installed on the housing (1), the input flange (6) abuts against the other first bearing (31).

7. The worm reducer according to claim 1, wherein: A third seal (71) for sealing the gap between the housing (1) and the worm gear (2) is connected between the housing (1) and the worm gear (2).

8. The worm reducer according to claim 7, wherein: The housing (1) is connected with an end cover (7), the end cover (7) is connected with the housing (1) through a fixing member, the third seal (71) is also used for sealing the gap between the end cover (7) and the worm gear (2), and the end cover (7) is connected with a fourth seal (72) for sealing the gap between the end cover (7) and the housing (1).

9. The worm reducer according to claim 8, wherein: The housing (1) is provided with a positioning groove (15) for cooperating with the end cover (7).

10. The worm reducer according to claim 8, characterized in that: Both ends of the worm gear (2) are connected with a second bearing (21), and the housing (1) and the end cover (7) are both provided with second grooves (16) for the corresponding second bearings (21) to be snapped into.

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