Low-noise high-precision gear transmission system

Abstract

The utility model discloses a low-noise high-precision gear transmission system which comprises a motor, a worm, at least two cylindrical gears and a plastic gear box body, the cylindrical gears are installed in the plastic gear box body through a transmission shaft, and the transmission shaft and the plastic gear box body are integrally formed through an injection molding process. By means of integral injection molding, composite structure reinforcement and material optimization, the core problems that an existing gear transmission system is large in noise, uneven in gap, low in assembly precision and the like are systematically solved, the noise reduction, efficiency improvement, cost reduction, service life prolonging and the like are remarkable, and the gear transmission system can be widely applied to the precision transmission field of household appliances, automation equipment, medical instruments and the like. And the method has outstanding market competitiveness.

Description

TECHNICAL FIELD

[0001] The utility model relates to a low noise high precision gear transmission system. BACKGROUND

[0002] The existing gear transmission system has problems of loud noise, uneven meshing gap and the like. This is because the impact noise is caused by the uneven meshing gap between the gear and the worm and the gear, and the uneven gap distribution is further caused by the assembly error (such as parallelism and perpendicularity deviation) of the transmission shaft and the gear box. Although the prior art reduces friction (such as patent CN207485988U) or optimizes the parallel shaft structure (such as patent CN211175235U), the following defects still exist: the assembly precision of the transmission shaft and the box is insufficient, resulting in unstable gap control. SUMMARY

[0003] In view of the above problems, the utility model provides a low noise high precision gear transmission system, which solves the problems of uneven meshing gap, loud noise and low assembly precision by optimizing the integrated design of the transmission shaft and the box.

[0004] The utility model adopts the technical scheme of:

[0005] A low noise high precision gear transmission system, comprising a motor, a worm, at least two cylindrical gears, a plastic gear box, the cylindrical gears being installed in the plastic gear box through a transmission shaft, and the transmission shaft and the plastic gear box being integrally formed through an injection molding process.

[0006] As a preferred, the transmission shaft is fixed with a support table on the outside of the end connected with the plastic gear box, the support table is annular, and is coaxially fixed with the transmission shaft.

[0007] As a preferred, the plastic gear box is fixed with a plurality of reinforcing ribs on the outside of the support table.

[0008] As a preferred, the plastic gear box is fixed with a support seat coaxial with the support table on the outside of the support table, the support seat is annular, the reinforcing ribs are located between the support table and the support seat, and the two ends of the reinforcing ribs are connected with the support table and the support seat respectively.

[0009] As a preferred, the parallelism error between the transmission shafts is less than or equal to 0.02mm, and the perpendicularity error between the transmission shaft and the plastic gear box is less than or equal to 0.05mm.

[0010] As a preferred, the worm and the cylindrical gears are made of engineering plastics.

[0011] The utility model has the following innovations:

[0012] 1. The transmission shaft and the plastic gear box are integrally formed by injection molding:

[0013] The transmission shaft and the plastic gear box are integrally formed by injection molding, abandoning the traditional split assembly method. The design eliminates the parallelism and perpendicularity deviation caused by the assembly error of the traditional transmission shaft and the box, ensures that the parallelism error between the transmission shafts is ≤0.02mm, and the perpendicularity error with the box is ≤0.05mm, thereby directly controlling the uniformity of the gear meshing gap.

[0014] 2. The composite structure design of the support table and the reinforcing rib:

[0015] A circular support table is arranged at the connection end of the transmission shaft and the box, and radial reinforcing ribs are additionally arranged outside the support table. A circular support seat coaxial with the support table is further arranged, and the reinforcing ribs are fixed between the support table and the support seat. The composite structure greatly improves the bending stiffness of the transmission shaft and the overall stability of the box, avoids the deformation of the shaft caused by load vibration, and further ensures the long-term uniformity of the meshing gap.

[0016] 3. Optimization application of engineering plastic gear assembly:

[0017] The worm and the cylindrical gear are made of high-strength engineering plastic (such as POM or POK). Compared with metal gears, engineering plastics have self-lubricating properties, which significantly reduce the friction noise when the gears mesh.

[0018] The utility model discloses an integrally formed by injection molding, composite structure strengthening, material optimization, systematically solves the core problems such as big noise, uneven gap, low assembly precision in the existing gear transmission system, and has outstanding market competitiveness in the aspects such as noise reduction, efficiency improvement, cost reduction and life extension. It can be widely used in precision transmission fields such as household appliances, automation equipment and medical equipment, and has outstanding market competitiveness. BRIEF DESCRIPTION OF DRAWINGS

[0019] Fig. 1 It is the structure schematic view of the utility model;

[0020] Fig. 2 It is the structure schematic view of the plastic gear box. DETAILED DESCRIPTION

[0021] It should be pointed out that the following detailed description is exemplary and is intended to provide further description of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as generally understood by those skilled in the art to which the present application belongs.

[0022] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups thereof.

[0023] In addition, in the description of the present application, it needs to be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise" and the like are based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0024] In addition, the terms "first", "second", "third", etc. are only used for description purpose and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise stated, the meaning of "multiple" is two or more, unless otherwise explicitly limited.

[0025] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting", "fixing" and the like should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, or it can be the communication between two elements inside. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0026] In the present application, unless otherwise explicitly specified and limited, the "upper" or "lower" of the first feature to the second feature can include the direct contact of the first and second features, or can include the contact of the first and second features through another feature between them. Moreover, the "upper", "upper" and "upper" of the first feature to the second feature include the vertical direction of the first feature above and oblique to the second feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The "below", "below" and "below" of the first feature to the second feature include the vertical direction of the first feature below and oblique to the second feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0027] The utility model will be described further in detail below by specific embodiments in connection with drawings.

[0028] As Figs. 1-2 The utility model discloses a low noise high precision gear transmission system, including motor (not shown in drawing), worm (not shown in drawing), at least two cylindrical gears 1, to plastic gear box 2, cylindrical gear 1 is installed in plastic gear box 2 through transmission shaft 3, transmission shaft 3 is integrally formed with plastic gear box 2 through injection molding process, because the motor, worm is fixed in plastic gear box 2 is conventional technical means, the utility model discloses the motor, worm has not been improved, therefore not drawn in the drawing.

[0029] Transmission shaft 3 is fixed with support platform 4 on the outside of one end connected with plastic gear box 2, support platform 4 is annular, and is coaxially fixed with transmission shaft 3.

[0030] Plastic gear box 2 is fixed with a plurality of reinforcing ribs 5 on the outside of support platform 4.

[0031] Plastic gear box 2 is fixed with support seat 6 coaxial with support platform 4 on the outside of support platform 4, support seat 6 is annular, and reinforcing rib 5 is located between support platform 4 and support seat 6, and the both ends of reinforcing rib 5 are connected with support platform 4 and support seat 6 respectively.

[0032] The shaft parallelism error of transmission shaft 3 is less than or equal to 0.02mm, and the perpendicularity error of transmission shaft 3 and plastic gear box 2 is less than or equal to 0.05mm.

[0033] The worm and cylindrical gear 1 are made of engineering plastics.

[0034] The low noise high precision gear transmission system of the utility model realizes noise reduction, high precision and stability through the following core design:

[0035] Integrated injection molding of transmission shaft and box:

[0036] Working principle:

[0037] In the conventional gear transmission system, the transmission shaft and the box are usually assembled in a split type, which is easy to cause parallelism or perpendicularity deviation due to machining and assembly errors, and further cause uneven gear meshing gap and noise. The utility model forms the transmission shaft and the plastic gear box by one-time molding through the injection molding process, eliminating the error accumulation in the conventional assembly.

[0038] Technical effect:

[0039] Ensure the parallelism error between the transmission shafts ≤0.02mm, and the perpendicularity error with the plastic gear box ≤0.05mm, thereby directly controlling the uniformity of gear meshing clearance, reducing vibration and impact noise caused by assembly error, and improving transmission accuracy.

[0040] Composite structure design of support table and reinforcing rib:

[0041] Support table design:

[0042] A circular ring-shaped support table is provided at the connection end of the transmission shaft and the plastic gear box, which is coaxially fixed with the transmission shaft, providing radial support force and enhancing the positioning stability of the transmission shaft.

[0043] Reinforcing rib design:

[0044] A plurality of radially distributed reinforcing ribs are provided on the outside of the support table, and a circular ring-shaped support seat coaxial with the support table is further added, with the two ends of the reinforcing rib fixed between the support table and the support seat.

[0045] Working principle:

[0046] Through the radial distribution of the reinforcing rib and the ring-shaped fixation of the support seat, a uniform force transmission path is formed, greatly improving the bending stiffness of the transmission shaft; under load or vibration conditions, the transmission shaft is prevented from deforming, ensuring the long-term stability of the gear meshing clearance.

[0047] Technical effects:

[0048] Improve the overall structural strength of the plastic gear box, reduce the micro-deformation of the shaft caused by vibration, and further reduce noise and wear caused by deformation.

[0049] Optimized application of engineering plastic gear assembly:

[0050] Material selection:

[0051] Both the worm and the cylindrical gear are made of high-strength engineering plastic (such as POM or POK), replacing traditional metal gears.

[0052] Working principle:

[0053] Engineering plastic has self-lubricating properties, reducing friction during gear meshing, thereby significantly reducing friction noise, and the vibration-absorbing properties of plastic materials can further absorb high-frequency vibrations during transmission.

[0054] Technical effects:

[0055] Significant noise reduction effect, especially suitable for noise-sensitive application scenarios (such as household appliances and medical equipment), reducing system weight, reducing energy consumption, and prolonging service life.

[0056] The utility model discloses through injection moulding integrated moulding, composite structure strengthens and material optimization, realized the high accuracy, low noise and long life of gear drive system, and its core lies in controlling error from the design source, and through the application of structural innovation and material science, the system performance is comprehensively promoted.

[0057] Finally, it should be noted that the above list is only the specific embodiments of the utility model. Obviously, the utility model is not limited to the above embodiments, and there can be many variations. All variations that can be directly derived or inferred from the content disclosed by the utility model by those of ordinary skill in the art should be considered as the protection scope of the utility model.

Claims

1. A low noise high precision gear transmission system, characterized in that, The utility model relates to a plastic gear box body (2) of motor, worm, at least two cylindrical gear (1), the cylindrical gear (1) is installed in plastic gear box body (2) through transmission shaft (3), transmission shaft (3) is integrally formed with plastic gear box body (2) through injection moulding process.

2. The low noise high precision gear transmission system according to claim 1, wherein, The transmission shaft (3) is fixed with the support platform (4) outside one end connected with the plastic gear box body (2), the support platform (4) is annular, and is coaxially fixed with the transmission shaft (3).

3. The low noise high precision gear transmission system according to claim 2, wherein, The plastic gear box body (2) is fixed with multiple reinforcing ribs (5) outside the support platform (4).

4. The low noise high precision gear transmission system according to claim 3, wherein, The plastic gear box body (2) is fixed with the support seat (6) coaxial with the support platform (4) outside the support platform (4), the support seat (6) is annular, the reinforcing rib (5) is located between the support platform (4) and the support seat (6), and the two ends of the reinforcing rib (5) are connected with the support platform (4) and the support seat (6) respectively.

5. The low noise high precision gear transmission system according to claim 4, wherein, The parallelism error between the transmission shaft (3) is less than or equal to 0.02mm, and the perpendicularity error between the transmission shaft (3) and the plastic gear box body (2) is less than or equal to 0.05mm.

6. The low noise high precision gear transmission system according to claim 5, wherein, The worm and the cylindrical gear (1) are made of engineering plastics.

Images