Rigidity-adjustable flexible zero-backlash transmission gear pair device

Abstract

The utility model relates to the technical field of mechanical design, machining and assembly, in particular to a rigidity-adjustable flexible zero-backlash transmission gear pair device, which overcomes the defects of mechanical design, machining and assembly in the prior art, and comprises a gear shaft I, gears I are meshed and connected with two sides of the gear shaft I, a gear II is arranged on one side of each gear I, and a gear shaft II is arranged on the other side of each gear II. Wherein one side of one first gear is connected with a second gear shaft in a meshed mode, a fastener is arranged on one side of the second gear, a screw rod is arranged on one side of the fastener, a spring is arranged on the surface of the screw rod, and a gasket is arranged on the surface of the screw rod.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical design, processing and assembly, in particular to a flexible zero-backlash transmission gear pair device with adjustable rigidity. Background Art

[0002] The presence of backlash can cause the teeth to rebound when the mechanism is subjected to a reverse impact, affecting the smoothness of the gear transmission. In precision transmission systems, it is necessary to ensure that there is no backlash to eliminate impact vibration during the meshing process and improve transmission accuracy. In actual processing, due to machining errors, installation errors and temperature changes, a certain amount of backlash will be left on the non-machined surface of the gear to prevent the gear from getting stuck. In order to eliminate the backlash, the gear tooth thickness is often adjusted to ensure it. However, this requires high precision in gear machining and housing machining, and the required cost is huge, making it difficult to meet actual requirements.

[0003] Therefore, it is necessary to have a flexible zero-backlash transmission gear pair device with strong design practicality, simple structure, and easy installation, with adjustable stiffness. Utility Model Content

[0004] The purpose of the utility model is to provide a flexible zero-backlash transmission gear pair device with adjustable stiffness, so as to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a flexible zero-backlash transmission gear pair device with adjustable stiffness, comprising a gear shaft one, gear shaft one having gears meshingly connected on both sides, gear one having gear two provided on one side, one of the gears one having gears meshingly connected on one side of the gear shaft two, gear two having a fastener provided on one side, a screw provided on one side of the fastener, a spring provided on the surface of the screw, and a gasket provided on the surface of the screw.

[0006] According to the above technical solution, a cotter pin is provided on the surface of the screw, and a nut is threadedly connected to the surface of the screw.

[0007] According to the above technical solution, the first gear is the main transmission gear, and the second gear is the anti-backlash gear.

[0008] According to the above technical solution, the fastener includes a step pin and a threaded pin. The step pin is fixed inside one of the anti-backlash gears. The threaded pin passes through the anti-backlash gear and the main transmission gear on the other side and is threadedly connected to its interior. The surface of the threaded pin is threadedly connected to nut 2.

[0009] According to the above technical solution, the second gear shaft is the input gear shaft, and the first gear shaft is the output gear shaft, wherein the input gear shaft is meshed and connected with the main transmission gear fixed inside and with the step pin.

[0010] According to the above technical solution, the spring is a butterfly spring.

[0011] Compared with the prior art, the beneficial effects achieved by the present invention are:

[0012] (1) By providing a transmission gear and an anti-backlash gear, the transmission gear and the anti-backlash gear are two independent transmission structures, which facilitates processing and reduces costs.

[0013] (2) By providing a butterfly spring, the device utilizes the compression of the butterfly spring to ensure a flexible zero-backlash gear pair transmission, which is convenient for installation and disassembly.

[0014] (3) It plays a buffering role in certain gear pair meshing conditions with rebound vibration, ensuring the smoothness of transmission and improving the service life of the gear. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0016] Figure 2 It is a top view of the utility model;

[0017] Figure 3 It is a partial cross-sectional view of the utility model;

[0018] Figure 4 It is a partial cross-sectional view of the utility model;

[0019] In the figure: 1. Gear 1; 2. Gear 2; 3. Gear shaft 1; 4. Step pin; 5. Threaded pin; 6. Screw; 7. Washer; 8. Spring; 9. Nut 1; 10. Split pin; 11. Gear shaft 2; 12. Nut 2. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] 1. Please refer to Figure 1-4The utility model provides a technical solution: a flexible zero-backlash transmission gear pair device with adjustable stiffness, including a gear shaft 3, a gear 1 meshingly connected to both sides of the gear shaft 3, a gear 2 2 provided on one side of the gear 1, a gear shaft 2 11 meshingly connected to one side of the gear 1, a fastener provided on one side of the gear 2, a screw 6 provided on one side of the fastener, a spring 8 provided on the surface of the screw 6, a gasket 7 provided on the surface of the screw 6, a cotter pin 10 provided on the surface of the screw 6, a nut 9 threadedly connected to the surface of the screw 6, and a gear 1. It is the main drive gear 1, gear two 2 is the anti-backlash gear 2, the fasteners include a step pin 4 and a threaded pin 5, the step pin 4 is fixed to the inside of one of the anti-backlash gears 2, the threaded pin 5 passes through the anti-backlash gear 2 on the other side and the main drive gear 1 and is threadedly connected with its internal thread, the surface of the threaded pin 5 is threadedly connected with a nut two 12, the gear shaft two 11 is the input gear shaft 11, the gear shaft one 3 is the output gear shaft 11, wherein the input gear shaft 11 is meshed with the main drive gear 1 fixed with the internal and step pin 4, and the spring 8 is a butterfly spring 8.

[0022] Specifically, the main transmission gear 1 and the anti-backlash gear 2 have exactly the same tooth parameters. During processing, a certain processing method is used to process the main transmission gear 1 and the anti-backlash gear 2 at the same time to ensure that the tooth data are completely consistent. The main transmission gear 1 and the anti-backlash gear 2 have corresponding holes at the end surfaces to facilitate the installation of the threaded pin 5. The end surface of the anti-backlash gear 2 is also provided with a step pin hole for installing the step pin 4. During assembly, the anti-backlash gear 2 is installed on the main transmission gear through the stopper. The main transmission gear 1 and the anti-backlash gear 2 are installed on the output gear shaft 3. The main transmission gear 1 and the anti-backlash gear 2 are simultaneously Engage with the gear on the input gear shaft 11, and install the threaded pin 5 through the through-hole of the anti-backlash gear to the main transmission gear. After installation, the nut 12 can be screwed on the back of the main transmission gear to prevent it from loosening. The step pin 4 is installed on the anti-backlash gear. At the same time, adjust and rotate the anti-backlash gear to ensure that the threaded pin and the step pin do not interfere with the through-hole to ensure the adjustment space margin. After the assembly is completed, several groups of butterfly springs 8 and gaskets 7 are installed on the screw 6. The screw passes through the threaded pin 5 and the step pin 4. The inner hole of the step pin 4 is threaded to tighten the screw 6. The spring 8 is compressed by rotating the screw 6 to produce The butterfly spring 8 generates reverse tension and rotational torque, causing the anti-backlash gear 2 to rotate around the axis in the gear reverse direction and generate a relative rotation angle with the main transmission gear 1, thereby achieving the effect of eliminating tooth clearance. After calculating the butterfly spring compression amount required to meet the transmission conditions, tighten the screw. When the compression amount is reached, tighten the nut 9 and insert the cotter pin 10 to prevent loosening to ensure the stability of the anti-backlash. During actual operation, the two gear angles are misaligned. When rotating forward, the working surface of the main transmission gear 1 and the gear working surface of the input gear shaft 11 are meshed, and the driving gear 1 and the input gear There is a gap between the non-working surfaces of the gears on shaft 11, but the elastic force of the spring 8 ensures that the side clearance between the non-working surface of the anti-backlash gear 2 and the non-working surface of the gear on the input gear shaft 11 is zero. When the gear pair is subjected to a reverse impact during transmission, the non-working surface of the anti-backlash gear 2 is engaged with the non-working surface of the gear on the input gear shaft 11 to ensure the smoothness of the transmission. When this flexible transmission device is subjected to a reverse impact on the gear box, the non-working surface of the anti-backlash gear 2 and the main drive gear 1 produce a flexible impact due to the action of the spring 8, which slows down the reverse impact and protects the gear box transmission device well.

[0023] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A flexible zero-backlash transmission gear pair device with adjustable stiffness, comprising a gear shaft (3), characterized in that: The two sides of the gear shaft one (3) are meshedly connected with gear one (1), one side of the gear one (1) is provided with gear two (2), one side of the gear one (1) is meshedly connected with gear shaft two (11), one side of the gear two (2) is provided with a fastener, one side of the fastener is provided with a screw (6), a surface of the screw (6) is provided with a spring (8), and a surface of the screw (6) is provided with a gasket (7).

2. The flexible zero-backlash transmission gear pair device with adjustable stiffness according to claim 1, characterized in that: A cotter pin (10) is provided on the surface of the screw rod (6), and a nut (9) is threadedly connected to the surface of the screw rod (6).

3. The flexible zero-backlash transmission gear pair device with adjustable stiffness according to claim 1, characterized in that: The gear one (1) is the main transmission gear, and the gear two (2) is the anti-backlash gear.

4. The flexible zero-backlash transmission gear pair device with adjustable stiffness according to claim 3, characterized in that: The fastener comprises a step pin (4) and a threaded pin (5); the step pin (4) is fixed to the inside of one of the clearance-eliminating gears; the threaded pin (5) passes through the clearance-eliminating gear and the main transmission gear on the other side and is threadedly connected to the inside of the gear; a nut (12) is threadedly connected to the surface of the threaded pin (5).

5. The flexible zero-backlash transmission gear pair device with adjustable stiffness according to claim 4, characterized in that: The second gear shaft (11) is the input gear shaft, and the first gear shaft (3) is the output gear shaft, wherein the input gear shaft is meshed with the main transmission gear fixed inside and with the step pin (4).

6. The flexible zero-backlash transmission gear pair device with adjustable stiffness according to claim 1, characterized in that: The spring (8) is a butterfly spring (8).

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