Double-shaft-hole type noise reduction machine core

Abstract

The utility model provides a double-shaft hole type noise reduction movement. The quartz clock movement comprises a motor wheel, a first third wheel and a second third wheel, gear shaft holes are formed in the two sides of the first third wheel, a positioning shaft is arranged on a gear seat matched with a gear provided with a shaft hole, and the positioning shaft is arranged in the gear shaft holes in a sleeving mode and is in clearance fit with the gear shaft holes; the gear provided with the gear shaft hole is made of a soft material. The gear shaft holes are formed in the two ends of the silencing wheel, the positioning shaft is arranged at the corresponding position corresponding to the cover plate or the positioning clamping plate, so that the relative positions of the silencing wheel and the positioning shaft in the axial direction have high stability, and particularly, the hard shaft which penetrates through the silencing wheel and is in tight fit with the silencing wheel has the following advantages that the yield is high; irreversible deformation of the wheel body or damage caused by other situations can be easily caused in the assembling process; 2) the mold opening cost is low;

Description

[0001] The priority basis of this application is "A low-noise quartz clock movement", the prior application number is: 202422634664.5, and the prior application date is: October 30, 2024. Technical Field

[0002] The utility model relates to the field of quartz clock movements, in particular to gears of quartz clock movements and an assembly system thereof. Background Art

[0003] To reduce costs, lighten weight, and improve production efficiency, gears in the fields to which this utility model applies are generally made of plastic materials, such as polyoxymethylene (POM) and ABS engineering plastics. However, due to the small size of quartz clock movements, the corresponding gear axle diameter is generally less than 2mm, which can easily lead to low or unstable precision due to easy breakage or deformation. Currently, the mainstream solutions for improving the strength of plastic gears include the following:

[0004] ① Reinforced plastic: Use plastic with added reinforcing materials, such as glass fiber reinforced plastic, to improve the strength and rigidity of the gear; or choose plastic materials suitable for the working environment to meet the requirements of resisting the influence of the external environment and stress to a certain extent, and reducing the risk of gear deformation and breakage.

[0005] ② Strengthen structural design

[0006] ●Optimize tooth shape and tooth direction: Rationally design the tooth shape and tooth direction of the gear to improve its load-bearing capacity and anti-deformation ability.

[0007] ●Add reinforcement structure: Add reinforcement structure at the center or other key positions of the gear, such as adding ribs or stiffeners to increase the overall rigidity and strength of the gear.

[0008] ③Adopt advanced production technology

[0009] ●Precisely control the molding temperature: During the production process, the molding temperature and cooling time of the plastic gears are strictly controlled to ensure the stability of the gear size and shape.

[0010] ●Use high-precision molds: Use high-precision molds for injection molding to reduce deformation and errors of gears during the molding process.

[0011] ④Post-processing and surface strengthening

[0012] ●Surface treatment technology: Special treatment of the gear surface, such as shot peening and carburizing, to improve its surface hardness and wear resistance.

[0013] ●Heat treatment: Heat treatment is performed on some plastic gears to improve their internal structure and performance, and enhance their strength and toughness.

[0014] ⑤Use reinforcing materials

[0015] During the design and production of plastic gears, a certain amount of reinforcing materials, such as glass fiber and carbon fiber, can be added to improve the strength and deformation resistance of the gears. These reinforcing materials can be tightly bonded to the plastic matrix to form a strong composite layer, significantly improving the mechanical properties of the gears.

[0016] ⑥Perform regular maintenance

[0017] For quartz clock movement gears that have been installed and running, regular cleaning, lubrication and other maintenance work is also very important. This can effectively reduce gear wear and deformation and extend its service life.

[0018] However, all of the above solutions have the problem of loud noise. Summary of the Invention

[0019] In this context, the present invention aims to provide a quartz clock movement with low noise and maintaining the advantages of traditional mainstream movements.

[0020] In order to achieve the above purpose, the technical solution provided by the utility model is:

[0021] A double-axis hole noise reduction movement, characterized in that: the quartz clock movement includes more than one gear, at least one gear is provided with a gear shaft hole, the gear seat matching the gear with the shaft hole is provided with a positioning shaft, the positioning shaft sleeve is arranged in the gear shaft hole and the positioning shaft and the gear shaft hole are clearance-fitted, and the diameters of the positioning shaft and the gear shaft hole are both less than 2 mm.

[0022] The quartz clock movement includes a motor wheel, a first passing wheel, and a second passing wheel; the first passing wheel is provided with a gear shaft hole.

[0023] Gear shaft holes are provided on both sides of the first passing wheel.

[0024] The motor wheel is not provided with a wheel axle hole.

[0025] The gear with the gear shaft hole is made of soft, oil-resistant material.

[0026] The software materials include but are not limited to PE\POM.

[0027] The benefits of the above technical solution are:

[0028] 1. The muffler wheel of the present invention is provided with gear shaft holes at both ends, and the corresponding cover plate or positioning splint is provided with a positioning shaft at the corresponding position, so that the relative position of the muffler wheel and the positioning shaft in the axial direction has a high stability, especially when the muffler wheel intersects with the hard shaft that is tightly fitted through the muffler wheel, which has the following advantages:

[0029] ●High yield rate: The soft wheel is tightly fitted with the hard shaft, which can easily lead to irreversible deformation of the wheel or other damage during the assembly process;

[0030] ●Low mold opening cost: The soft wheel that fits tightly with the hard shaft requires high precision of the through hole, and the core pulling process is prone to difficulty in completely forming the hole because the gear is too small.

[0031] 2. The present invention is provided with one or more gears with gear shaft holes, so that the gear shaft and the gear are independent of each other, thereby allowing the gear shaft and the gear to be made of different materials. Under the premise of ensuring the strength of the small-diameter gear shaft, the requirements for preparing the gear material are reduced, and there is further space for gears made of soft materials. Therefore, the quartz clock movement has further design space to further reduce noise.

[0032] 3. This new model precisely uses soft materials and a gear shaft hole design only on the first wheel, effectively maintaining the coordination between the motor wheel and the travel gear train, while also providing a buffering effect on the motor wheel, accurately solving the root cause of the noise generated, while also maintaining the technical advantages of mainstream movements. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 This is a schematic diagram of the assembly of the movement of Example 1;

[0034] Figure 2 This is a schematic diagram of the assembly of a movement with multiple gear shaft holes and gears in Example 1;

[0035] Figure 3 This is a schematic diagram of the assembly of the movement of Example 2. DETAILED DESCRIPTION Example 1

[0036] like Figure 1-2 A dual-axis hole noise reduction movement shown includes a movement housing and a gear transmission system, wherein the gear transmission system includes: a motor wheel / drive wheel 1, a first passing wheel 2, a second passing wheel 3, a third passing wheel 4 and a travel gear train 5; the motor wheel 1 is equipped with a magnet 11; the first passing wheel 2 is provided with a gear shaft hole 21, and the gear seat matching the gear with the shaft hole is provided with a positioning shaft 22, the positioning shaft 22 is sleeved in the gear shaft hole 21 and the positioning shaft 22 and the gear shaft hole 21 are clearance-fitted, and the diameters of the positioning shaft 22 and the gear shaft hole 21 are both less than 2 mm; the gear seat is provided in the movement housing.

[0037] The first pulley can be provided with a gear shaft hole on only one side as needed. In this embodiment, gear shaft holes are further provided on both sides.

[0038] The motor wheel is not provided with a wheel axle hole.

[0039] The gear with the gear shaft hole is made of a soft material, and the soft material includes but is not limited to PE and POM.

[0040] Furthermore, the diameters of the positioning shaft and the gear shaft holes are both less than 1 mm and greater than 0.5 mm.

[0041] Working Principle: The motor wheel is equipped with a magnet. Because its mass is higher than other gear trains, and the control conditions for the rotational inertia of the magnet (magnetic steel) are limited, its concentricity is relatively low. Therefore, during operation, the motor wheel often rotates eccentrically, which is prone to noise caused by impact. On the other hand, the first gear not only directly drives the motor wheel, but also has the highest speed in the transmission gear train. Therefore, using a soft material for the first gear is the best choice. The principle of using soft gears to achieve noise reduction includes:

[0042] 1) Low noise: Soft plastic gears are generally smoother, which reduces friction and vibration during operation, thereby reducing noise. In contrast, hard gears may generate louder noise during operation due to rigid collisions.

[0043] 2) Self-lubricating properties: Soft plastic gears have a certain degree of self-lubricating properties, which means that they can lubricate themselves during operation, reducing friction and wear, thereby further reducing noise. This self-lubricating property allows soft plastic gears to maintain good operation in certain applications without the need for additional lubricant.

[0044] 3) Elastic buffering effect: Soft plastic gears can play a certain elastic buffering role during the meshing process, which helps to reduce the impact and vibration between gears and thus reduce the noise level. Example 2

[0045] The assembly diagram of the double-axis hole type noise reduction core described in the embodiment can also be used as follows Figure 3 The scheme shown. Example 3

[0046] like Figure 2 As shown in or 3, a dual-axis hole noise reduction movement described in Example 1 or 2, at least two wheels with gear shaft holes are provided between the motor wheel / drive wheel and the timing wheel, including the minute hand wheel, hour hand wheel and / or second hand wheel, including at least the first wheel and the second wheel.

Claims

1. A double-axis hole type noise reduction core, characterized by: The dual-axis hole noise reduction movement includes a motor wheel, a first passing wheel, and a second passing wheel; gear shaft holes are provided on both sides of the first passing wheel, and the gear seat matching the gear with the shaft hole is provided with a positioning shaft, and the positioning shaft sleeve is arranged in the gear shaft hole and the positioning shaft and the gear shaft hole are clearance-matched.

2. The double-axis hole type noise reduction movement according to claim 1, characterized in that: The motor wheel is not provided with a wheel axle hole.

3. A dual-axis hole type noise reduction core according to claim 1 or 2, characterized in that: The gear with the gear shaft hole is made of soft material.

4. The double-axis hole type noise reduction movement according to claim 3, characterized in that: The diameters of the positioning shaft and the gear shaft holes are both less than 2 mm.

5. The double-axis hole type noise reduction movement according to claim 4, characterized in that: The diameters of the positioning shaft and the gear shaft holes are both less than 1 mm and greater than 0.5 mm.

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