Low-noise speed reducer structure for gear box

Abstract

A silencing outer shell comprises a speed reducer inner shell and a silencing outer shell which are sequentially connected from inside to outside, the silencing outer shell comprises a sound absorption inner shell, an air layer and a sound absorption outer shell which are sequentially connected from inside to outside, the silencing outer shell is connected with an air pipe, the air pipe is communicated with the air layer, and the air layer is communicated with the sound absorption outer shell. A plurality of first grooves are evenly formed in the inner wall of the speed reducer inner shell at intervals, a plurality of second grooves are formed in the outer wall of the speed reducer inner shell, a plurality of protruding columns are connected to the side, connected with the speed reducer inner shell, of the sound absorption inner shell, and the protruding columns are connected with the second grooves in an inserted mode in a matched mode. The silencing outer shell is arranged outside the inner shell of the speed reducer in a sleeving mode, so that noise generated during operation of the speed reducer can be effectively reduced; therefore, while continuous air is provided for the air layer through the air pipe to achieve air vibration isolation and noise reduction, the air absorbing heat is exhausted through the air pipe, external air is supplemented into the air layer, and the air layer has good practicability.

Description

Technical Field

[0001] The utility model relates to the technical field of transmission mechanisms, in particular to a low-noise reducer structure for a gear box. Background Art

[0002] A worm gear reducer is a power transmission mechanism that uses a gear speed converter to reduce the rotational speed of an electric motor to the desired speed, thereby generating a high torque. Reducers are widely used in mechanisms for transmitting power and motion. They can be found in the transmission systems of various machines, from ships, automobiles, and motorcycles, to heavy construction machinery, processing equipment and automated production equipment used in the machinery industry, and even in everyday household appliances and watches. They are used in applications ranging from high-power transmission to small loads and precise angular transmission. In industrial applications, reducers can both reduce speed and increase torque. However, when used, reducer motors can generate considerable noise, which can affect the surrounding environment.

[0003] For this purpose, a silent worm gear reduction motor disclosed in application number CN202322045224.1 has appeared in the prior art, including a housing, the housing being composed of a lower housing and an upper housing, the top of the upper housing being provided with a cylindrical shell connected to its inner cavity, the inner cavity of the cylindrical shell being rotatably connected to a worm via a bearing, a rotating shaft perpendicular to the worm being rotatably connected between the lower housing and the upper housing via a bearing, the rotating shaft being provided with a worm wheel meshing with the worm. This silent worm gear reduction motor can effectively block the noise propagation path through the cooperation between the sound-proof plate, the broadband sound-absorbing layer, the air layer and the low-frequency sound-absorbing layer, so that the housing can seal the noise, has a good noise reduction effect, can effectively block the outward transmission of noise, and reduce the impact of noise on the environment.

[0004] However, the above technical solution still needs to be improved. During long-term use, a large amount of heat is easily generated between the worm gear and accumulates in the entire reduction motor and cannot be effectively discharged, thereby affecting normal operation. Utility Model Content

[0005] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a low-noise reducer structure for a gearbox, which can reduce noise while ensuring an overall heat dissipation effect.

[0006] According to the low-noise reducer structure for a gearbox in the embodiment of the first aspect of the present utility model, the sound-absorbing outer shell includes a reducer inner shell and a sound-absorbing outer shell connected in sequence from the inside to the outside, the sound-absorbing outer shell includes a sound-absorbing inner shell, an air layer and a sound-absorbing outer shell connected in sequence from the inside to the outside, an air duct is connected to the sound-absorbing outer shell, the air duct is connected to the air layer, a plurality of first grooves are evenly spaced on the inner wall of the reducer inner shell, a plurality of second grooves are provided on the outer wall of the reducer inner shell in adaptation to the first grooves, a plurality of bosses are adaptively connected to the second grooves on one side of the sound-absorbing inner shell connected to the reducer inner shell, and the bosses are adaptively plugged into the second grooves.

[0007] The low-noise reducer structure for the gear box according to the embodiment of the present invention has at least the following beneficial effects: by arranging a silencer outer shell outside the inner shell of the reducer, the noise generated by the reducer during operation can be effectively reduced, and at the same time, an air duct is arranged to be connected to the air layer, so that while the air duct provides continuous air to the air layer to achieve gas vibration isolation and silence, the air that absorbs heat is discharged through the air duct and the external air is added to the air layer, which has good practicality.

[0008] According to some embodiments of the present invention, the sound-absorbing inner shell is connected to the sound-absorbing outer shell via a plurality of rubber pads arranged at intervals, and the gap between the sound-absorbing inner shell and the sound-absorbing outer shell forms the air layer.

[0009] According to some embodiments of the present invention, the second groove is filled with thermal grease.

[0010] According to some embodiments of the present invention, the sound-absorbing inner shell is a hollow structure.

[0011] According to some embodiments of the present invention, the hollow sound-absorbing inner shell is partitioned to form a plurality of adjacent and connected sound-absorbing cavities.

[0012] According to some embodiments of the present invention, a notch is provided on a side of the sound absorbing cavity facing the air layer, and a sealing plate is slidably connected to the notch.

[0013] According to some embodiments of the present invention, the sound absorbing cavity is filled with a first sound absorbing material.

[0014] According to some embodiments of the present invention, the sound-absorbing shell is a hollow structure.

[0015] According to some embodiments of the present invention, the hollow sound-absorbing shell is filled with a second sound-absorbing material.

[0016] According to some embodiments of the present invention, the air inlet of the air duct and the air outlet of the air duct are both provided with a one-way valve.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0019] Figure 1 This is a schematic three-dimensional structural diagram of a low-noise reducer structure for a gear box according to an embodiment of the present utility model.

[0020] Figure 2 This is a side structural schematic diagram of a low-noise reducer structure for a gearbox according to an embodiment of the present invention.

[0021] Figure 3 This is a partial structural diagram of a low-noise reducer structure for a gearbox according to an embodiment of the present invention.

[0022] Figure 4 This is a partial structural diagram of a low-noise reducer structure for a gear box according to another embodiment of the present invention.

[0023] 100. Reducer inner shell; 110. First groove; 120. Second groove; 130. Thermal grease; 200. Silencer outer shell; 210. Sound-absorbing inner shell; 211. Boss; 212. Sound-absorbing cavity; 213. Notch; 214. Sealing plate; 220. Air layer; 230. Sound-absorbing outer shell; 240. Air duct; 250. Rubber pad; 251. Ventilation hole; 310. First sound-absorbing material; 320. Second sound-absorbing material. DETAILED DESCRIPTION

[0024] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0025] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0026] In the description of this utility model, "several" means one or more, "many" means more than two, "greater than," "less than," and "exceed" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. The use of "first" and "second" in the description is solely for the purpose of distinguishing technical features and is not to be construed as indicating or implying relative importance, implicitly specifying the number of the indicated technical features, or implicitly specifying the order of the indicated technical features.

[0027] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0028] refer to Figure 1 、 Figure 2 as well as Figure 3 As shown, according to the low-noise reducer structure for the gearbox of an embodiment of the present utility model, the silencer outer shell 200 includes a reducer inner shell 100 and a silencer outer shell 200 connected in sequence from the inside to the outside, the silencer outer shell 200 includes a sound-absorbing inner shell 210, an air layer 220 and a sound-absorbing outer shell 230 connected in sequence from the inside to the outside, the silencer outer shell 200 is connected to the air duct 240, the air duct 240 is connected to the air layer 220, a plurality of first grooves 110 are evenly spaced on the inner wall of the reducer inner shell 100, a plurality of second grooves 120 are adapted to the first grooves 110 on the outer wall of the reducer inner shell 100, a plurality of bosses 211 are adapted to be connected to the second grooves 120 on the side where the sound-absorbing inner shell 210 is connected to the reducer inner shell 100, and the bosses 211 are adapted to be plugged into the second grooves 120.

[0029] In actual use, by arranging the silencer housing 200 outside the inner shell of the reducer, the noise generated by the reducer during operation can be effectively reduced. At the same time, an air duct 240 is provided to connect with the air layer 220, so that the air duct 240 provides continuous air to the air layer 220 to achieve gas vibration isolation and silence. At the same time, the air duct 240 discharges the gas that has absorbed heat and replenishes the external air into the air layer 220, which has good practicality. At this time, the presence of the first groove 110 and the second groove 120 makes the wall thickness between the first groove 110 and the second groove 120 relatively thin, thereby facilitating heat transfer. This also ensures the sealing of the entire reducer inner shell 100 without affecting the heat dissipation performance.

[0030] Specifically, the silencer outer shell 200 and the reducer inner shell 100 can be produced and assembled separately. It is only necessary to fit the silencer outer shell 200 onto the reducer inner shell 100 in sequence. The overall structure is convenient to use.

[0031] Some specific embodiments of the present invention may also include the following additional technical features: The sound-absorbing inner shell 210 and the sound-absorbing outer shell 230 are connected by multiple rubber pads 250 arranged at intervals. The gaps between the sound-absorbing inner shell 210 and the sound-absorbing outer shell 230 form an air layer 220. The rubber pads 250 not only absorb sound and dissipate energy, but also provide support. Specifically, each rubber pad 250 is provided with ventilation holes 251 to ensure air circulation.

[0032] Some specific embodiments of the present invention may also have the following additional technical features: the second groove 120 is filled with thermal grease 130. The thermal grease 130 further transfers heat, accelerating the heat in the reducer inner housing 100 to the sound-absorbing inner housing 210 and dissipating the heat through the gas flowing in the air layer 220.

[0033] In some specific embodiments of the present invention, the following additional technical features may be provided: the sound-absorbing inner shell 210 is a hollow structure.

[0034] In some specific embodiments of the present invention, the following additional technical features may be provided: a plurality of adjacent and connected sound absorbing cavities 212 are formed by partitioning the hollow sound absorbing inner shell 210 .

[0035] Some specific embodiments of the present invention may also have the following additional technical features: a notch 213 is formed on the side of the sound absorption cavity 212 facing the air layer 220, and a sealing plate 214 is slidably connected to the notch 213. Through this design, when the sound waves generated in the reducer inner housing 100 vibrate, they cause the medium (usually air) in the sound absorption cavity 212 to move. Due to the presence of the sealing plate 214, the medium in the sound absorption cavity 212 needs to overcome the resistance of the sealing plate 214 to move. At the same time, the airflow in the straight flow channel of the air layer 220 causes the sealing plate 214 to produce a fluctuating reciprocating motion, thereby achieving mechanical energy consumption, thereby effectively reducing noise.

[0036] Some specific embodiments of the present invention may also have the following additional technical features: the sound absorption cavity 212 is filled with a first sound absorbing material 310. Specifically, the first sound absorbing material 310 is foamed aluminum. Foamed aluminum has high porosity and a large specific surface area, and has excellent shock absorption performance. It also has high strength, high specific rigidity, high temperature resistance, and light weight. Moreover, foamed aluminum is made of metal aluminum and has certain thermal conductivity.

[0037] The above-mentioned sound-absorbing inner shell 210 forms an acoustic bandgap between the sound-absorbing outer shell 230 and the reducer inner shell 100 by adopting the Bragg scattering principle of the acoustic superstructure. Based on the acoustic bandgap effect, the noise of the worm gear mechanism in the silencer inner shell is suppressed. Moreover, after the sound waves enter the air layer 220, they achieve the purpose of noise reduction through multi-stage Helmholtz resonance.

[0038] In some specific embodiments of the present invention, it may also have the following additional technical features: the sound-absorbing shell 230 is a hollow structure.

[0039] refer to Figure 4 As shown, in some specific embodiments of the present invention, it may also have the following additional technical features: the sound-absorbing outer shell 230 has the same structure as the sound-absorbing inner shell 210 and is mirror-inverse, so that it can interact more fully with the air layer 220 to improve the sound-absorbing effect.

[0040] Some specific embodiments of the present invention may also have the following additional technical features: The hollow sound-absorbing shell 230 is filled with a second sound-absorbing material 320. This second sound-absorbing material 320 is a microporous plastic, which is covered with numerous interconnected or disconnected micropores, resulting in a significantly reduced apparent density. This material offers advantages such as light weight, thermal insulation, sound absorption, shock resistance, moisture resistance, and corrosion resistance.

[0041] Some specific embodiments of the present invention may also have the following additional technical features: a one-way valve (not shown) is provided at both the air inlet and the air outlet of the air duct 240. The presence of the one-way valve ensures that the air flow in the air duct 240 is unidirectional, thereby optimizing the air flow path and preventing internal friction before the air enters the air layer 220, which would reduce the air flow velocity and affect the noise reduction and heat dissipation functions.

[0042] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the scope of knowledge possessed by ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A low-noise reducer structure for a gear box, comprising a silencer housing (200), characterized in that: The muffler housing (200) comprises a reducer inner housing (100) and a muffler housing (200) which are sequentially connected from the inside to the outside. The muffler housing (200) comprises a sound-absorbing inner housing (210), an air layer (220), and a sound-absorbing outer housing (230) which are sequentially connected from the inside to the outside. An air duct (240) is connected to the muffler housing (200), and the air duct (240) is in communication with the air layer (220). The reducer inner housing (100) A plurality of first grooves (110) are evenly spaced on the inner wall of the reducer inner shell (100); a plurality of second grooves (120) are adapted to the first grooves (110) on the outer wall of the reducer inner shell (100); a plurality of protrusions (211) are adapted to be connected to the second grooves (120) on one side of the sound-absorbing inner shell (210) connected to the reducer inner shell (100); and the protrusions (211) are adapted to be plugged into the second grooves (120).

2. The low-noise reducer structure for a gearbox according to claim 1, characterized in that: The sound-absorbing inner shell (210) and the sound-absorbing outer shell (230) are connected via a plurality of rubber pads (250) arranged at intervals, and the gap between the sound-absorbing inner shell (210) and the sound-absorbing outer shell (230) forms the air layer (220).

3. The low-noise reducer structure for a gearbox according to claim 1, characterized in that: The second groove (120) is filled with thermal conductive silicone grease (130).

4. The low-noise reducer structure for a gearbox according to claim 1, characterized in that: The sound-absorbing inner shell (210) is a hollow structure.

5. The low-noise reducer structure for a gearbox according to claim 4, characterized in that: The hollow sound-absorbing inner shell (210) is partitioned to form a plurality of adjacently connected sound-absorbing cavities (212).

6. The low-noise reducer structure for a gearbox according to claim 5, characterized in that: A notch (213) is provided on one surface of the sound absorption cavity (212) facing the air layer (220), and a sealing plate (214) is slidably connected in the notch (213).

7. The low-noise reducer structure for a gearbox according to claim 6, characterized in that: The sound absorbing cavity (212) is filled with a first sound absorbing material (310).

8. The low-noise reducer structure for a gearbox according to claim 1, characterized in that: The sound-absorbing shell (230) is a hollow structure.

9. The low-noise reducer structure for a gearbox according to claim 8, characterized in that: The hollow sound-absorbing shell (230) is filled with a second sound-absorbing material (320).

10. The low-noise reducer structure for a gearbox according to claim 1, characterized in that: The air inlet of the air duct (240) and the air outlet of the air duct (240) are both provided with a one-way valve.

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