Sheet gear anti-backlash mechanism capable of reducing meshing excitation

Abstract

The utility model relates to the technical field of gearboxes, and discloses a sheet gear anti-backlash mechanism capable of reducing meshing excitation, which comprises a driving gear, a gear hub of the driving gear is meshed with a driven gear, three groups of springs are embedded in the inner wall of the driving gear, and three groups of steel balls are embedded in the inner wall of the driving gear. Three sets of steel balls are arranged on the outer wall of the driving gear, the three sets of steel balls make contact with the surfaces of the ends of the corresponding springs respectively, a sheet anti-backlash gear for limiting the springs is arranged on the portion, located on one side of the three sets of springs, of the outer wall of the driving gear, and a fastening mechanism is arranged between the driving gear and the sheet anti-backlash gear. The staggered structure of the sheet anti-backlash gear and the driving gear is matched with a spring, a steel ball and a fastening mechanism, gear backlash is eliminated, reverse idle stroke errors are avoided, transmission precision is improved, meanwhile, the structure is simple and compact, high-precision machining and assembling are not needed, cost is reduced, meshing impact vibration can be reduced, noise is lowered, and the service life of the gear is prolonged.

Description

Technical Field

[0001] This application relates to the field of gearbox technology, specifically to a backlash-eliminating mechanism for thin-plate gears that reduces meshing excitation. Background Technology

[0002] A gearbox is a mechanical device consisting of several pairs of gears with adjustable speed ratios and directions of motion. It can adapt to different usage requirements and is essentially a closed gear system or a mechanical unit composed of a series of integrated gears located in a housing.

[0003] Currently, gearboxes in various industries generally suffer from gear meshing knocking and noise problems, including backlash-free gear structure meshing instability, knocking noise caused by gear backlash, large dynamic meshing force, poor stiffness of gear pair system, excitation force, impact and vibration during multi-condition switching, and high-frequency noise caused by transmission error. Utility Model Content

[0004] The purpose of this application is to provide a thin-plate gear backlash elimination mechanism that reduces meshing excitation, and solves the problems of gear meshing knocking and noise commonly found in transmissions of various industries mentioned in the background art, such as stable meshing of backlash-eliminating gear structures, knocking noise caused by gear backlash, large dynamic meshing force, poor stiffness of gear pair system, excitation force, impact and vibration during multi-condition switching, and high-frequency noise caused by transmission error.

[0005] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0006] This application provides a thin-plate gear backlash-eliminating mechanism for reducing meshing excitation, including a driving gear, the hub of which meshes with a driven gear, three sets of springs embedded in the inner wall of the driving gear, three sets of steel balls embedded in the inner wall of the driving gear, and the three sets of steel balls respectively contacting the end surfaces of the corresponding springs, a thin-plate backlash-eliminating gear for limiting the springs is provided on the outer wall of the driving gear located on one side of the three sets of springs, and a fastening mechanism is provided between the driving gear and the thin-plate backlash-eliminating gear.

[0007] By adopting the above technical solution and through the unique design of the thin-plate backlash-free gear, the gear transmission performance is effectively improved. The misaligned structure of the thin-plate backlash-free gear and the driving gear, together with the spring, steel ball and fastening mechanism, eliminates gear backlash, avoids reverse backlash error, and improves transmission accuracy. At the same time, the structure is simple and compact, does not require high-precision machining and assembly, reduces costs, and can also reduce meshing impact vibration, reduce noise and extend gear life.

[0008] Optionally, each set of steel balls and corresponding springs are arranged in a figure-7 shape on the inner wall of the drive gear.

[0009] By adopting the above technical solution, the steel ball and spring are arranged in a figure-7 shape in the drive gear, and the limit corresponds to the movement distance of the steel ball and spring.

[0010] Optionally, the fastening mechanism includes three sets of limiting holes formed on the outer wall of the thin-plate backlash-free gear, and rivets are provided through the inner wall of the thin-plate backlash-free gear located inside the limiting holes, and the rivets are embedded in the inner wall of the drive gear.

[0011] By adopting the above technical solution, rivets can be used to fasten the drive gear and the thin-plate backlash-free gear.

[0012] Optionally, an inclined baffle is fixedly installed in the inner wall of the thin-plate backlash-free gear located on one side of the corresponding spring, and the inclined baffle is in contact with the steel ball.

[0013] By adopting the above technical solution, the thin-plate backlash-free gear can fix the inclined baffle, and the contact surface of the inclined baffle at the steel ball is set with an incline, and the inner wall of the drive gear at the steel ball is also set with an incline.

[0014] Optionally, the inner ring wall of the thin-plate backlash-free gear is fixedly connected with three sets of rectangular baffles, and the three sets of rectangular baffles correspond to the positions of the corresponding springs.

[0015] By adopting the above technical solution, the rectangular baffle can limit and block the spring.

[0016] Compared with the prior art, the beneficial effects of the technical solution of this application are as follows:

[0017] The technical solution of this application effectively improves the gear transmission performance through the unique design of thin-plate backlash-free gears. The misaligned structure of the thin-plate backlash-free gear and the driving gear, together with springs, steel balls and fastening mechanisms, eliminates gear backlash, avoids reverse backlash error, and improves transmission accuracy. At the same time, the structure is simple and compact, does not require high-precision machining and assembly, reduces costs, and can also reduce meshing impact vibration, reduce noise and extend gear life. Attached Figure Description

[0018] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0019] Figure 1 This is a right exploded view of a backlash-reducing thin-plate gear mechanism for reducing meshing excitation according to this application.

[0020] Figure 2 This is a left exploded view of a backlash-reducing thin-plate gear mechanism for reducing meshing excitation according to this application;

[0021] Figure 3This is a side enlarged view of a thin-plate backlash-eliminating gear, which is a thin-plate backlash-eliminating mechanism for reducing meshing excitation according to this application.

[0022] In the diagram: 1. Driving gear; 2. Driven gear; 3. Thin-plate backlash-free gear; 4. Spring; 5. Steel ball; 6. Rivet; A. Limiting hole; B. Inclined baffle; C. Rectangular baffle. Detailed Implementation

[0023] 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 skilled in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figure 1-3 This application provides a technical solution: a thin-plate gear backlash elimination mechanism for reducing meshing excitation, including a driving gear 1, a driven gear 2 meshing with the hub of the driving gear 1, three sets of springs 4 embedded in the inner wall of the driving gear 1, three sets of steel balls 5 embedded in the inner wall of the driving gear 1, and the three sets of steel balls 5 respectively contacting the end surfaces of the corresponding springs 4, a thin-plate backlash elimination gear 3 for limiting the springs 4 is provided on the outer wall of the driving gear 1 located on one side of the three sets of springs 4, and a fastening mechanism is provided between the driving gear 1 and the thin-plate backlash elimination gear 3;

[0025] In the technical solution of this application, the unique design of the thin-plate backlash-free gear 3 effectively improves the gear transmission performance. The misalignment structure between the thin-plate backlash-free gear 3 and the driving gear 1, together with the spring 4, steel ball 5 and fastening mechanism, eliminates gear backlash, avoids reverse backlash error, and improves transmission accuracy. At the same time, the structure is simple and compact, does not require high-precision machining and assembly, reduces costs, reduces meshing impact vibration, reduces noise, and extends gear life.

[0026] In the technical solution of this application, such as Figure 2 and Figure 3 As shown, the fastening mechanism includes three sets of limiting holes A opened on the outer wall of the thin-plate backlash-free gear 3. The inner wall of the thin-plate backlash-free gear 3 located inside the limiting holes A is provided with rivets 6, and the rivets 6 are embedded in the inner wall of the drive gear 1. The rivets 6 can fasten the drive gear 1 and the thin-plate backlash-free gear 3.

[0027] In the technical solution of this application, such as Figure 1 and Figure 3As shown, each set of steel balls 5 and corresponding springs 4 are arranged in a figure-7 shape in the inner wall of the drive gear 1. The figure-7 arrangement of steel balls 5 and springs 4 in the drive gear 1 limits the movement of the corresponding steel balls 5 and springs 4. An inclined baffle B is fixedly installed in the inner wall of the thin-plate backlash-free gear 3 located on one side of the corresponding spring 4. The inclined baffle B contacts the steel balls 5. The thin-plate backlash-free gear 3 can fix the inclined baffle B. The contact surface of the inclined baffle B at the steel balls 5 is set with an incline, and the inner wall of the drive gear 1 at the steel balls 5 is also set with an incline.

[0028] In the technical solution of this application, such as Figure 1 and Figure 3 As shown, three sets of rectangular baffles C are fixedly connected to the inner ring wall of the thin-plate backlash-free gear 3. The three sets of rectangular baffles C correspond to the positions of the corresponding springs 4. The rectangular baffles C can limit and block the springs 4.

[0029] In use, the driving gear 1 and driven gear 2 are made of low-carbon structural alloy steel (such as 20CrMnTiH, 20MnCr5, etc.) and undergo surface hardening treatment (carburizing or carbonitriding) to improve strength and wear resistance. The thin-plate backlash-free gear 3 is made of steel with slightly lower mechanical properties but can meet the working requirements (such as Q235-A, etc.) to reduce costs. The spring 4 is made of 65Mn material because it has good elastic properties and fatigue strength. The steel ball 5 is made of GCr15 because it has high hardness and good wear resistance. The rivet 6 can be made of low-carbon steel, aluminum alloy, copper alloy, etc. to meet the requirements of limiting and processing assembly.

[0030] The dimensions and angle of the "7-shaped" groove on the inner wall of the drive gear 1 are used to install the spring 4 and the steel ball 5. The inclined baffle B is used to contact the steel ball 5, and the rectangular baffle C is used to limit the lateral deformation of the spring 4. The three sets of springs 4 are respectively placed in the "7-shaped" groove on the inner wall of the drive gear 1 to ensure that the spring 4 is in direct contact with the bottom surface of the groove. The three sets of steel balls 5 are respectively placed in the side groove above the spring 4 so that the steel ball 5 is in contact with the end surface of the spring 4.

[0031] The thin-plate backlash-free gear 3 is fastened onto the driving gear 1. The thin-plate backlash-free gear 3 is rotated so that the hole of the rivet 6 is aligned with the hole on the driving gear 1. The rivet 6 is passed through the limiting hole A of the thin-plate backlash-free gear 3 and embedded into the inner wall of the driving gear 1, so that the thin-plate backlash-free gear 3 and the driving gear 1 are fastened together by the rivet 6, restricting the movement of the thin-plate backlash-free gear 3 in the axial and circumferential directions.

[0032] Install the assembled drive gear 1 and thin-plate backlash-free gear 3 into the correct positions in the transmission, ensuring that drive gear 1 and driven gear 2 mesh correctly.

[0033] The preload of spring 4 pushes steel ball 5, which moves radially toward the teeth in the "7-shaped" groove of the drive gear 1. At the same time, it pushes the inclined surface in the groove of the drive gear 1 and the inclined surface on the thin-plate backlash-free gear 3, so that the drive gear 1 and the thin-plate backlash-free gear 3 rotate a certain angle in the circumferential direction, thereby causing the tooth surface of the thin-plate backlash-free gear 3 to be offset from the tooth surface of the drive gear 1 by a certain angle.

[0034] The driven gear 2 meshes with both the driving gear 1 and the thin-plate backlash-free gear 3. The tooth surface of the thin-plate backlash-free gear 3 pushes the tooth surface of the driven gear 2 to fit tightly against the tooth surface of the driving gear 1, thus eliminating the tooth backlash of the gear pair.

[0035] When the gear reverses, it needs to overcome the force of spring 4 before it can contact the opposite tooth surface, which reduces the meshing excitation accordingly. The staggered tooth structure of the thin-plate backlash-free gear 3 makes the left side of the tooth of the driving gear 1 and the right side of the tooth of the driven gear 2 closely fit the left and right sides of the tooth groove of the driving gear 1, respectively, avoiding the backlash error when reversing and improving the gear transmission accuracy. The radial rectangular protruding baffle of the thin-plate backlash-free gear 3 restricts the bending deformation of spring 4 in the direction along the gear axis, ensuring that spring 4 is in a normal state during operation and further stabilizing the gear transmission.

[0036] The gear transmission after backlash elimination is smoother, reducing the impact and vibration caused by backlash during gear meshing, thereby reducing noise;

[0037] Through the above workflow, the thin-plate gear backlash elimination mechanism that reduces meshing excitation can effectively eliminate gear backlash, improve gear transmission accuracy, reduce meshing excitation, noise and vibration, and extend gear service life. It is suitable for gearboxes in machine tools, automobiles, agricultural machinery and equipment and other fields.

[0038] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0039] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A thin-section gear backlash mechanism that reduces mesh excitation, characterized by: The device includes a drive gear (1), the hub of which meshes with a driven gear (2). Three sets of springs (4) are embedded in the inner wall of the drive gear (1), and three sets of steel balls (5) are embedded in the inner wall of the drive gear (1). The three sets of steel balls (5) respectively contact the end surfaces of the corresponding springs (4). A thin-plate backlash-free gear (3) is provided on the outer wall of the drive gear (1) located on one side of the three sets of springs (4) to limit the movement of the springs (4). A fastening mechanism is provided between the drive gear (1) and the thin-plate backlash-free gear (3).

2. A thin-section gear backlash elimination mechanism that reduces meshing excitation according to claim 1, characterized by, Each set of steel balls (5) and corresponding springs (4) are arranged in a figure-7 shape in the inner wall of the drive gear (1).

3. A thin-section gear backlash mechanism that reduces meshing excitation according to claim 2, characterized by, The fastening mechanism includes three sets of limiting holes (A) opened on the outer wall of the thin-plate backlash-free gear (3). The inner wall of the thin-plate backlash-free gear (3) located inside the limiting holes (A) is provided with rivets (6), and the rivets (6) are embedded in the inner wall of the drive gear (1).

4. A thin-section gear backlash elimination mechanism that reduces meshing excitation according to claim 3, characterized by, An inclined baffle (B) is fixedly installed in the inner wall of the thin backlash-free gear (3) located on one side of the corresponding spring (4), and the inclined baffle (B) is in contact with the steel ball (5).

5. A thin-section gear backlash mechanism that reduces meshing excitation according to claim 4, characterized by, The inner ring wall of the thin-plate backlash-free gear (3) is fixedly connected with three sets of rectangular baffles (C), and the three sets of rectangular baffles (C) correspond to the positions of the corresponding springs (4).

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