Totally sealed worm gear box

Abstract

The utility model belongs to the field of turbine box, concretely relates to a kind of full sealing worm wheel box, including box, box cover, worm and worm wheel, box cover is sealed and is arranged on box, and the sealed cavity for placing worm, worm wheel is formed between box cover and box, worm is rotatably arranged in box and is engaged with worm wheel, box has the sleeve portion of circular ring, the output part of the rotating shaft one end of worm wheel has the output part of being inserted in sleeve portion, sealing ring that is sealed with the inner wall of sleeve portion is provided on output part, positioning hole is provided on the positioning part of rotating shaft on box cover, O ring that is sealed with the inner wall of positioning hole is provided on the positioning part of rotating shaft, the turbine box adopts full sealing structure design, the rotating shaft of turbine and box, box cover adopt multidirectional sealing structure, turbine rotation is arranged in the sleeve portion of box, sleeve portion separates lubricating oil in box from rotating shaft portion, avoid lubricating oil to cause direct impact to sealing ring, it is favorable to promote the sealing performance of the turbine box.

Description

Technical Field

[0001] This utility model belongs to the field of worm gear box technology, specifically relating to a fully sealed worm gear box. Background Technology

[0002] A worm gear box is a traditional transmission device consisting of a worm gear, a worm shaft, a bearing, and a housing. Worm gear boxes are widely used, particularly in the valve industry.

[0003] The existing turbine gearbox has an unreasonable internal structure design. The lubricating oil inside the turbine gearbox can easily cause direct impact on the seals, greatly shortening their service life, leading to decreased sealing performance and oil leakage. Furthermore, if the worm gearbox operates in a cold external environment for a long time, the drive shaft connected to the handwheel is prone to freezing due to rain, making it difficult to turn the handwheel and causing the worm gearbox to malfunction. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings and deficiencies of the existing technology and to provide a fully sealed worm gear box with stable and reliable sealing performance.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A fully sealed worm gear box includes a box body, a box cover, a worm, and a worm wheel. The box cover is sealed on the box body, and a sealed cavity for placing the worm and worm wheel is formed between the box cover and the box body. The worm is rotatably mounted in the box body and meshes with the worm wheel. The box body has an annular sleeve portion. One end of the worm wheel's rotating shaft has an output portion inserted into the sleeve portion, forming a rotatable connection between the rotating shaft and the box body. The output portion is provided with a sealing ring that seals with the inner wall of the sleeve portion. The box cover is provided with a positioning hole corresponding to the positioning portion of the rotating shaft. The positioning portion of the rotating shaft is provided with an O-ring that seals with the inner wall of the positioning hole. A screw cap that seals with the positioning hole is connected to the positioning portion.

[0006] In some embodiments, the worm wheel has a section of arc-shaped worm wheel teeth, which mesh with the worm. Arc-shaped oil guide grooves are respectively provided on both sides of the worm wheel corresponding to the worm wheel teeth.

[0007] In some embodiments, the screw cap has a protruding ring portion that passes through a positioning hole, and a rubber ring is provided between the protruding ring portion and the positioning hole.

[0008] In some embodiments, the cap is connected to the positioning part by a plurality of bolts arranged in a plurality of annular arrays, and a sealing gasket is provided between the positioning part and the cap.

[0009] In some embodiments, the bottom wall of the housing is provided with a plurality of reinforcing ribs surrounding the sleeve portion.

[0010] In some embodiments, the worm gear includes a drive shaft rotatably disposed within a housing and a helical tooth portion connected to the drive shaft, the helical tooth portion meshing with a worm gear, one end of the drive shaft having a positioning end inserted into a positioning groove within the housing, and the other end of the drive shaft passing through a mounting hole in the housing and having a mounting end extending outside the housing.

[0011] In some embodiments, a ball bearing is provided between each end of the helical tooth portion of the drive shaft and the inner wall of the housing.

[0012] In some embodiments, the drive shaft is provided with an O-ring seal that seals against the inner wall of the mounting hole.

[0013] In some embodiments, the output section of the rotating shaft is provided with a connection hole exposed outside the housing, and the output section is provided with a plurality of snap-fit ​​grooves connected to the connection hole in a ring array.

[0014] In some embodiments, the box body is provided with a sealing groove, and a sealing rubber ring that seals with the box cover is provided in the sealing groove. The box cover is provided with a plurality of screws, which pass through the box cover and are connected to the outside of the sealing groove of the box body.

[0015] The beneficial effects of this utility model are as follows: The turbine box adopts a fully sealed structure design. The turbine shaft, the box body, and the box cover adopt a multi-directional sealing structure. The turbine rotation is set inside the sleeve part of the box body. The sleeve part can separate the lubricating oil in the box body from the shaft part, avoiding the lubricating oil from directly impacting the sealing ring, thereby improving the sealing performance of the turbine box. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, obtaining other drawings based on these drawings without creative effort still falls within the scope of this utility model.

[0017] Figure 1 This is a perspective view of an embodiment of the present utility model; Figure 2 This is an exploded view of an embodiment of the present utility model; Figure 3 This is a cross-sectional view of an embodiment of the present utility model; Figure 4 This is a perspective view of the worm gear in an embodiment of the present invention. Detailed Implementation

[0018] To make the technical problem to be solved, the technical solution, and the beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0019] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the invention. The terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0020] The directional and positional terms used in this utility model, such as up, down, front, back, left, right, inside, outside, top, bottom, side, etc., are only for reference to the accompanying drawings. Therefore, the directional and positional terms used are for the purpose of explaining and understanding this utility model, and not for limiting the scope of protection of this utility model.

[0021] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments: like Figure 1-4 As shown, a fully sealed worm gear box includes a box body 1, a box cover 2, a worm 3, and a worm wheel 4. The box cover 2 is sealed on the box body 1, and a sealed cavity 100 for placing the worm 3 and the worm wheel 4 is formed between the box cover 2 and the box body 1. The worm 3 is rotatably disposed in the box body 1 and meshes with the worm wheel 4. The box body 1 has an annular sleeve portion 11. One end of the rotating shaft 41 of the worm wheel 4 has an output portion 411 inserted into the sleeve portion 41, which constitutes a rotatable connection between the rotating shaft 41 and the box body 1. A sealing ring 5 is provided on the output portion 411 to seal with the inner wall of the sleeve portion 11. A positioning hole 21 is provided on the box cover 2 at the positioning portion 412 corresponding to the rotating shaft 41. An O-ring 6 is provided on the positioning portion 412 of the rotating shaft 41 to seal with the inner wall of the positioning hole 21. A screw cap 7 that seals with the positioning hole 21 is connected to the positioning portion 412.

[0022] like Figure 2 and 4 As shown, the worm gear 4 has a section of arc-shaped worm gear teeth 42, which mesh with the worm 3. Arc-shaped oil guide grooves 421 are provided on both sides of the worm gear teeth 42. These grooves guide lubricating oil to the meshing point between the worm gear and the worm, thereby improving the lubrication and cooling effects of the worm gear and worm.

[0023] like Figure 2 and 3As shown, the cap 7 has a protruding ring 71 inserted into the positioning hole 21, and a rubber ring 8 is provided between the protruding ring 71 and the positioning hole 21. The rubber ring enhances the sealing performance between the cap and the cover. The cap 7 is connected to the positioning part 412 by multiple bolts 9 arranged in a ring array, and a sealing gasket 72 is provided between the positioning part 412 and the cap 7. The sealing gasket enhances the sealing performance between the cap and the rotating shaft, preventing rainwater from entering the turbine housing along the cap and the rotating shaft, thus improving the sealing performance. Multiple reinforcing ribs 12 are provided around the sleeve part 11 on the bottom wall of the housing 1. The reinforcing ribs enhance the strength of the entire housing, thereby helping to extend the service life of the turbine housing. The worm gear 3 includes a drive shaft 31 rotatably mounted within the housing 1 and a helical gear 32 connected to the drive shaft 31. The helical gear 32 meshes with the turbine 4. One end of the drive shaft 31 has a positioning end 311 that inserts into a positioning groove 13 within the housing 1, and the other end of the drive shaft 31 passes through a mounting hole 14 in the housing 1 and has a mounting end 312 extending outside the housing 1. A ball bearing 33 is respectively installed on the drive shaft 31 between the two ends of the helical gear 32 and the inner wall of the housing 1. The ball bearings ensure reliable rotation of the drive shaft within the housing, thereby improving the operational reliability of the turbine housing. An O-ring seal 34 is provided on the drive shaft 31 to seal against the inner wall of the mounting hole 14. The O-ring seal enhances the sealing performance between the drive shaft and the housing, preventing icing between the drive shaft and the housing in cold environments, thus improving the sealing performance of the turbine housing. The output section 411 of the rotating shaft 41 has a connection hole 413 exposed outside the housing 1. Multiple snap-fit ​​grooves 414, connected to the connection hole 413, are arranged in a ring array on the output section 413. The multiple snap-fit ​​grooves on the output section of the rotating shaft facilitate installation of the shaft with external equipment, resulting in higher installation efficiency and more reliable transmission. The housing 1 has a sealing groove 15, within which a sealing rubber ring 16 is installed to seal against the housing cover 2. Multiple screws 17 are installed on the housing cover 2, passing through the housing cover 2 and connecting to the outside of the sealing groove 15 of the housing 1. The sealing rubber ring on the housing prevents rainwater from entering the turbine housing along the connection between the housing and the housing cover, thereby improving the sealing performance of the turbine housing.

[0024] The turbine housing adopts a fully sealed structure design. The turbine shaft, housing, and cover are sealed in multiple directions. The turbine rotation is set inside the sleeve of the housing. The sleeve can separate the lubricating oil in the housing from the shaft, avoiding direct impact of the lubricating oil on the sealing ring, thus improving the sealing performance of the turbine housing.

[0025] The above description is only one embodiment of the present utility model and is not intended to limit the scope of protection of the present utility model; the scope of protection of the present utility model is defined by the claims in the claims, and all equivalent changes and modifications made in accordance with the utility model are within the scope of protection of the present utility model patent.

Claims

1. A fully sealed worm gear box, characterized in that: The device includes a housing, a cover, a worm gear, and a worm wheel. The cover is sealed onto the housing, and a sealed cavity for housing the worm gear and worm wheel is formed between the cover and the housing. The worm gear is rotatably mounted inside the housing and meshes with the worm wheel. The housing has an annular sleeve. One end of the worm wheel's shaft has an output portion that passes through the sleeve, forming a rotatable connection between the shaft and the housing. The output portion is provided with a sealing ring that seals against the inner wall of the sleeve. The cover has a positioning hole corresponding to the positioning portion of the shaft. The positioning portion of the shaft has an O-ring that seals against the inner wall of the positioning hole. A rotating cap that seals against the positioning hole is connected to the positioning portion.

2. The fully sealed worm gear box according to claim 1, characterized in that: The worm wheel has a section of arc-shaped worm wheel teeth, which mesh with the worm. The worm wheel has arc-shaped oil guide grooves on both sides corresponding to the worm wheel teeth.

3. The fully sealed worm gear box according to claim 1, characterized in that: The screw cap has a protruding ring portion that passes through a positioning hole, and a rubber ring is provided between the protruding ring portion and the positioning hole.

4. The fully sealed worm gear box according to claim 3, characterized in that: The cap is connected to the positioning part by multiple bolts arranged in a ring array, and a sealing gasket is provided between the positioning part and the cap.

5. The fully sealed worm gear box according to claim 1, characterized in that: The bottom wall of the box body is provided with multiple reinforcing ribs around the sleeve.

6. The fully sealed worm gear box according to claim 1, characterized in that: The worm gear includes a drive shaft rotatably disposed within the housing and a helical gear connected to the drive shaft. The helical gear meshes with the worm gear. One end of the drive shaft has a positioning end inserted into a positioning groove within the housing, and the other end of the drive shaft passes through a mounting hole in the housing and has a mounting end extending outside the housing.

7. The fully sealed worm gear box according to claim 6, characterized in that: A ball bearing is provided at each end of the helical tooth section of the drive shaft and between the inner wall of the housing.

8. The fully sealed worm gear box according to claim 6, characterized in that: The drive shaft is provided with an O-ring seal that seals with the inner wall of the mounting hole.

9. The fully sealed worm gear box according to claim 1, characterized in that: The output section of the rotating shaft is provided with a connection hole exposed outside the housing, and the output section is provided with a plurality of snap-fit ​​grooves that are connected to the connection hole in a ring array.

10. The fully sealed worm gear box according to claim 1, characterized in that: The box body is provided with a sealing groove, and a sealing rubber ring that seals with the box cover is provided in the sealing groove. The box cover is provided with a plurality of screws, which pass through the box cover and are connected to the outside of the sealing groove of the box body.

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