Low-noise worm and gear speed reducer

Abstract

The utility model discloses a low-noise worm and gear speed reducer which comprises a shell, a worm is rotationally connected in the shell, a worm gear is rotationally connected in the shell and located below the worm, the worm gear is connected with the worm in a meshed mode, and a rotating shaft is rotationally connected in the shell. According to the low-noise worm and gear speed reducer, a worm gear drives a second sleeve to move back and forth in a first sleeve through a connecting plate, when the second sleeve moves upwards, negative pressure is generated in the first sleeve under the action of a first one-way valve and a second one-way valve, lubricating oil at the bottom of a shell is pumped into the first sleeve, and when the second sleeve moves downwards, the negative pressure is generated in the second sleeve; lubricating oil in the first sleeve can enter the second sleeve through the second one-way valve and then is sprayed to the worm through the spray head, so that the worm and the worm gear are lubricated and noise is reduced, the first sleeve and the second sleeve can swing back and forth in the process, the lubricating oil at the bottom of the shell is stirred, and heat dissipation of the lubricating oil is facilitated.

Description

Technical Field

[0001] This utility model relates to the field of worm gear reducer technology, and more specifically, to a low-noise worm gear reducer. Background Technology

[0002] A worm gear reducer is a power transmission mechanism that uses a gear speed converter to reduce the rotational speed of a motor to a desired speed while obtaining a larger torque. Reducers have a wide range of applications in mechanisms for transmitting power and motion. They can be found in the transmission systems of various machines, from ships, automobiles, and locomotives in transportation vehicles, heavy construction machinery, processing tools and automated production equipment in the machinery industry, to common household appliances and clocks. Their applications range from high-power transmission to low-load, precise angular transmission. In industrial applications, reducers serve both speed reduction and torque amplification functions.

[0003] Chinese patent CN202420381603.X discloses a low-noise worm gear reducer. This utility model adds a buffer and shock absorption function to the bottom of the housing and adds a sound insulation function to the inner wall of the housing, which greatly reduces the noise of the worm gear reducer. During use, it can cool the lubricating oil and filter impurities in the lubricating oil, so that the lubricating oil can better lubricate the worm gear, reduce friction loss or noise, and extend the service life of the worm gear reducer. However, there are still some problems. The worm gear reducer requires a pump to pump the lubricating oil, which increases the overall cost of the worm gear reducer. Therefore, we provide a low-noise worm gear reducer. Utility Model Content

[0004] The purpose of this invention is to provide a low-noise worm gear reducer to solve the problems mentioned in the background art.

[0005] Some existing low-noise worm gear reducers require the use of an extraction component, namely an oil pump, to pump lubricating oil, which increases the overall cost of the worm gear reducer.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A low-noise worm gear reducer includes a housing, a worm rotatably connected inside the housing, a worm wheel rotatably connected inside the housing and below the worm, the worm wheel meshing with the worm, a rotating shaft rotatably connected inside the housing, a first sleeve fixedly connected to the outside of the rotating shaft, a second sleeve slidably connected inside the first sleeve, a connecting plate disposed between the second sleeve and the worm wheel, one end of the connecting plate rotatably connected to the second sleeve, and the other end of the connecting plate rotatably connected to the worm wheel, a first one-way valve fixedly connected to the bottom of the first sleeve, and a second one-way valve fixedly connected to the outside of the second sleeve near the end of the first sleeve.

[0008] Preferably, a nozzle is fixedly connected to the outer end of the second sleeve away from the first sleeve.

[0009] Preferably, the nozzle has a bent structure.

[0010] Preferably, the outer wall of the second sleeve is fitted with the inner wall of the first sleeve.

[0011] Preferably, a third sleeve is fitted over the outside of the first sleeve, the third sleeve being threadedly connected to the first sleeve, and a filter screen is fixedly connected inside the first sleeve.

[0012] Preferably, the cross-sections of the first sleeve, the second sleeve, and the third sleeve are all circular.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] The worm gear drives the second sleeve to move back and forth inside the first sleeve via a connecting plate. When the second sleeve moves upward, a negative pressure is generated inside the first sleeve due to the action of the first and second one-way valves, drawing the lubricating oil from the bottom of the housing into the first sleeve. When the second sleeve moves downward, the lubricating oil in the first sleeve enters the second sleeve through the second one-way valve and is then sprayed onto the worm through a nozzle, thereby lubricating and reducing noise between the worm and the worm gear. During this process, the first and second sleeves swing back and forth, agitating the lubricating oil at the bottom of the housing, which is beneficial for heat dissipation. This utility model has a simple structure, low cost, and strong practicality. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a cross-sectional schematic diagram of the entire present invention;

[0017] Figure 3 This is a schematic diagram of the nozzle structure of this utility model;

[0018] Figure 4 This is a schematic diagram of the structure of the filter screen of this utility model;

[0019] Figure 5 This is a cross-sectional schematic diagram of the first set of tubes of this utility model.

[0020] The following are the labels in the diagram: 1. Housing; 2. Worm; 3. Worm wheel; 4. Shaft; 5. First sleeve; 6. Second sleeve; 7. Connecting plate; 8. First check valve; 9. Second check valve; 10. Nozzle; 11. Third sleeve; 12. Filter screen. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figures 1 to 5 A low-noise worm gear reducer includes a housing 1, a worm 2 rotatably connected inside the housing 1, a worm wheel 3 rotatably connected inside the housing 1 and below the worm 2, the worm wheel 3 meshing with the worm 2, a rotating shaft 4 rotatably connected inside the housing 1, a first sleeve 5 fixedly connected to the outside of the rotating shaft 4, a second sleeve 6 slidably connected inside the first sleeve 5, and a connecting plate 7 provided between the second sleeve 6 and the worm wheel 3. When the worm wheel 3 rotates, it can drive the second sleeve 6 to slide back and forth within the first sleeve 5 through the connecting plate 7. At the same time, the first sleeve 5 and the second sleeve 6 are driven to swing back and forth, thereby agitating the lubricating oil at the bottom of the housing 1, which is conducive to the heat dissipation of the lubricating oil. One end of the connecting plate 7 is rotatably connected to the second sleeve 6, and the other end of the connecting plate 7 is rotatably connected to the worm gear 3. The bottom of the first sleeve 5 is fixedly connected to the first one-way valve 8, and the outer end of the second sleeve 6 near the first sleeve 5 is fixedly connected to the second one-way valve 9. The lubricating oil can only enter the first sleeve 5 through the first one-way valve 8, and can only enter the second sleeve 6 and be sprayed out through the second one-way valve 9.

[0023] Furthermore, a nozzle 10 is fixedly connected to the outer end of the second sleeve 6 away from the first sleeve 5. The nozzle 10 can better spray the extracted lubricating oil onto the worm 2, so as to achieve the purpose of lubrication and noise reduction between the worm 2 and the worm wheel 3.

[0024] Furthermore, the nozzle 10 has a bent structure, which allows the nozzle of the nozzle 10 to be directly aligned with the worm gear 2.

[0025] Furthermore, the outer wall of the second sleeve 6 is fitted to the inner wall of the first sleeve 5, and the second sleeve 6 and the first sleeve 5 are tightly fitted. When the second sleeve 6 slides back and forth inside the first sleeve 5, it can draw and spray the lubricating oil at the bottom of the housing 1 in conjunction with the first one-way valve 8 and the second one-way valve 9, thus achieving the function of a pump.

[0026] Furthermore, a third sleeve 11 is fitted outside the first sleeve 5, and the third sleeve 11 is threadedly connected to the first sleeve 5. A filter screen 12 is fixedly connected inside the first sleeve 5. The filter screen 12 can filter impurities in the lubricating oil and prevent impurities from entering the first one-way valve 8 and causing blockage.

[0027] Furthermore, the cross-sections of the first sleeve 5, the second sleeve 6, and the third sleeve 11 are all circular. The second sleeve 6 is fitted outside the first sleeve 5, and the third sleeve 11 is fitted outside the second sleeve 6.

[0028] The usage steps of this utility model are as follows: When this low-noise worm gear reducer is in use, the rotation of the worm 2 will drive the worm wheel 3 to rotate. The worm wheel 3 drives the second sleeve 6 to move back and forth in the first sleeve 5 through the connecting plate 7. When the second sleeve 6 moves upward, due to the action of the first one-way valve 8 and the second one-way valve 9, a negative pressure is generated in the first sleeve 5, drawing the lubricating oil at the bottom of the housing 1 into the first sleeve 5. When the second sleeve 6 moves downward, the lubricating oil in the first sleeve 5 will enter the second sleeve 6 through the second one-way valve 9, and then be sprayed onto the worm 2 through the nozzle 10, thereby lubricating and reducing noise between the worm 2 and the worm wheel 3. During the process, the first sleeve 5 and the second sleeve 6 will swing back and forth, thereby agitating the lubricating oil at the bottom of the housing 1, which is beneficial for the heat dissipation of the lubricating oil. The filter screen 12 in the third sleeve 11 can filter impurities in the lubricating oil and prevent clogging of the first one-way valve 8. This utility model has a simple structure, low cost, and strong practicality.

[0029] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A low-noise worm gear reducer, comprising a housing (1), a worm (2) rotatably connected inside the housing (1), and a worm wheel (3) rotatably connected inside the housing (1) and below the worm (2), the worm wheel (3) meshing with the worm (2), characterized in that: The housing (1) is rotatably connected to a rotating shaft (4), and a first sleeve (5) is fixedly connected to the outside of the rotating shaft (4). A second sleeve (6) is slidably connected inside the first sleeve (5). A connecting plate (7) is provided between the second sleeve (6) and the worm gear (3). One end of the connecting plate (7) is rotatably connected to the second sleeve (6), and the other end of the connecting plate (7) is rotatably connected to the worm gear (3). A first one-way valve (8) is fixedly connected to the bottom of the first sleeve (5), and a second one-way valve (9) is fixedly connected to the outside of the second sleeve (6) near the first sleeve (5).

2. The low-noise worm gear reducer according to claim 1, characterized in that: A nozzle (10) is fixedly connected to the outer end of the second sleeve (6) away from the first sleeve (5).

3. The low-noise worm gear reducer according to claim 2, characterized in that: The nozzle (10) has a bent structure.

4. The low-noise worm gear reducer according to claim 1, characterized in that: The outer wall of the second sleeve (6) is in contact with the inner wall of the first sleeve (5).

5. A low-noise worm gear reducer according to claim 1, characterized in that: A third sleeve (11) is fitted on the outside of the first sleeve (5), and the third sleeve (11) is threadedly connected to the first sleeve (5). A filter screen (12) is fixedly connected inside the first sleeve (5).

6. A low-noise worm gear reducer according to claim 5, characterized in that: The cross-sections of the first sleeve (5), the second sleeve (6), and the third sleeve (11) are all circular.

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