Low-noise cycloid gear structure

Abstract

The utility model discloses a low-noise cycloidal gear structure which comprises a speed reduction mechanism and a noise reduction mechanism. The speed reducing mechanism comprises a pin tooth holding shell, a rotating shaft arranged in the pin tooth holding shell, two eccentric bearings connected to the outer side of the rotating shaft in a sleeving mode, a first cycloidal gear, a second cycloidal gear and a plurality of pins, wherein the first cycloidal gear and the second cycloidal gear are movably connected to the outer sides of the two eccentric bearings in a sleeving mode, and the pins movably penetrate through the second cycloidal gear and are connected with the first cycloidal gear. The pin teeth are mounted in the pin tooth retaining shell, and the outer wall of the first cycloidal gear and the outer wall of the second cycloidal gear are both attached to the outer walls of the pin teeth. In the utility model, the sealing ring is blocked between the cycloidal gear I and the cycloidal gear II, so that the friction degree between the cycloidal gear I and the cycloidal gear II is reduced to a certain extent, then the plurality of pins are extruded to the position of the oil cavity every time, lubricating oil flows out from the oil outlet holes, and then the cycloidal gear I and the cycloidal gear II are lubricated, so that the cycloidal gear I and the cycloidal gear II rotate more smoothly, and the noise in the rotating process of the cycloidal gear I and the cycloidal gear II is effectively reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of cycloid gears, in particular to a low-noise cycloid gear structure. Background Art

[0002] Cycloid gears are a general term for cylindrical gears whose tooth profiles are various cycloids or equidistant curves. Cycloid gears can have very few teeth and are often used in instrumentation. They are rarely used for power transmission, while their derivative, the cycloid pinwheel drive, is more widely used.

[0003] The cycloid gears currently in use tend to be precise and complex in their structural design, which results in varying degrees of noise during operation. Moreover, the noise will become louder as the use time increases, thus forming noise pollution. Utility Model Content

[0004] The utility model aims to solve one of the technical problems existing in the prior art or related technologies.

[0005] To this end, the technical solution adopted in this utility model is:

[0006] A low-noise cycloid gear structure includes a speed reduction mechanism and a noise reduction mechanism, the speed reduction mechanism includes a pinion holding shell, a rotating shaft arranged inside the pinion holding shell, two eccentric bearings sleeved on the outside of the rotating shaft, a cycloid wheel 1 and a cycloid wheel 2 movably sleeved on the outsides of the two eccentric bearings, a plurality of pins movably passing through the cycloid wheel 2 and connected to the cycloid wheel 1, a plurality of pinions installed inside the pinion holding shell, the outer walls of the cycloid wheel 1 and the outer walls of the cycloid wheel 2 are both in contact with the outer walls of the pinions, a noise reduction mechanism, the noise reduction mechanism includes a sealing ring fitted between the cycloid wheel 1 and the cycloid wheel 2, a plurality of oil chambers opened on the sealing ring, an oil plug connected to the oil chamber, and two oil outlet holes opened on the inner side of the sealing ring and connected to the inside of the oil chamber.

[0007] By adopting the above technical solution, the sealing ring is blocked between the cycloid wheel 1 and the cycloid wheel 2, which reduces the friction between the two to a certain extent. Then, each time the multiple pins are squeezed into the oil chamber position, the lubricating oil will flow out from the oil outlet, and then lubricate the cycloid wheel 1 and the cycloid wheel 2, making the two rotate more smoothly and effectively reducing the noise during the rotation process.

[0008] In a preferred example, the present invention can be further configured as follows: a plurality of pins are arranged in a ring shape at equal intervals, and the outer walls of the pins are interference fit with the inner edge of the sealing ring.

[0009] In a preferred example, the present invention can be further configured as follows: the second cycloid wheel is located outside the first cycloid wheel, and the sum of the thicknesses of the first cycloid wheel and the second cycloid wheel is equal to the length of the needle teeth.

[0010] In a preferred example, the present invention can be further configured as follows: a plurality of openings are provided on the sealing ring, the plurality of openings are arranged in a ring shape with equal spacing, and the plurality of openings are staggered with the plurality of oil chambers.

[0011] In a preferred example, the present invention can be further configured as follows: a plurality of threaded rods are plugged into the needle tooth retaining housing, and nuts are screwed onto the outer ends of the threaded rods.

[0012] In a preferred example, the present invention can be further configured as follows: an annular groove is provided on the outer side of the oil plug, and the oil plug is clamped with the sealing ring through the annular groove.

[0013] By adopting the above technical solution, the beneficial effects achieved by the utility model are as follows:

[0014] 1. In the present invention, the sealing ring is blocked between the cycloid wheel 1 and the cycloid wheel 2, which reduces the friction between the two to a certain extent. Then, each time the multiple pins are squeezed into the oil chamber position, the lubricating oil will flow out from the oil outlet hole, and then lubricate the cycloid wheel 1 and the cycloid wheel 2, making the two rotate more smoothly and effectively reducing the noise during the rotation process.

[0015] 2. In the present invention, the rotating shaft rotates the cycloid wheel 1 and the cycloid wheel 2 through two eccentric bearings, and then the pin and the pin teeth limit the cycloid wheel 1 and the cycloid wheel 2, reducing the range of their activities and making their rotation more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is an assembly stereogram of the overall structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the disassembly of the overall structure of the utility model;

[0018] Figure 3 This is a three-dimensional diagram of the sealing ring of the utility model;

[0019] Figure 4 For this utility model Figure 3 A magnified view of the structure of part A.

[0020] Reference numerals:

[0021] 100, speed reduction mechanism; 110, needle gear retaining housing; 120, rotating shaft; 130, eccentric bearing; 140, cycloid wheel 1; 150, cycloid wheel 2; 160, pin; 170, needle gear;

[0022] 200, noise reduction mechanism; 210, sealing ring; 220, oil chamber; 230, oil plug; 240, oil outlet hole;

[0023] 300, opening;

[0024] 400, threaded rod. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the present invention more clear, the present invention is further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings. It should be noted that the embodiments of the present invention and the features therein can be combined with each other unless there is any conflict.

[0026] It should be understood that these descriptions are only exemplary and are not intended to limit the scope of the present invention.

[0027] A low-noise cycloid gear structure provided by some embodiments of the present invention will be described below with reference to the accompanying drawings.

[0028] Example 1:

[0029] Combine Figure 1-4 As shown, the utility model provides a low-noise cycloid gear structure, including a speed reduction mechanism 100 and a noise reduction mechanism 200, the speed reduction mechanism 100 includes a pinion holding housing 110, a rotating shaft 120 provided inside the pinion holding housing 110, two eccentric bearings 130 sleeved on the outside of the rotating shaft 120, a cycloid wheel 140 and a cycloid wheel 2 150 movably sleeved on the outside of the two eccentric bearings 130, a plurality of pins 160 movably passing through the cycloid wheel 2 150 and connected to the cycloid wheel 1 140, and a plurality of pinions 170 installed inside the pinion holding housing 110, the outer walls of the cycloid wheel 140 and the outer walls of the cycloid wheel 2 150 are both in contact with the outer walls of the pinions 170;

[0030] The noise reduction mechanism 200 includes a sealing ring 210 fitted between the cycloidal wheel 140 and the cycloidal wheel 2 150, a plurality of oil chambers 220 opened on the sealing ring 210, an oil plug 230 inserted into the oil chamber 220, and two oil outlet holes 240 opened on the inner side of the sealing ring 210 and connected to the interior of the oil chamber 220.

[0031] Furthermore, multiple pins 160 are arranged in a ring at equal intervals, and the outer wall of the pin 160 is interference fit with the inner edge of the sealing ring 210. This layout design ensures that the pin 160 can rotate and be squeezed into the oil chamber 220, so that the lubricating oil in the oil chamber 220 can be squeezed out.

[0032] Furthermore, the cycloid wheel 150 is located outside the cycloid wheel 140, and the sum of the thickness of the cycloid wheel 140 and the cycloid wheel 2 150 is equal to the length of the needle teeth 170. With this structural design, the cycloid wheel 140 and the cycloid wheel 2 150 can be stably matched.

[0033] Furthermore, an annular groove is provided on the outer side of the oil plug 230 , and the oil plug 230 is engaged with the sealing ring 210 through the annular groove. The annular groove is provided to ensure that the oil plug 230 can block the oil cavity 220 .

[0034] Example 2:

[0035] Combine Figure 2-3 As shown, based on the first embodiment, a plurality of openings 300 are provided on the sealing ring 210, and the plurality of openings 300 are equally spaced and arranged in a ring shape. The plurality of openings 300 are staggered with the plurality of oil chambers 220. The provision of the openings 300 can increase the elasticity of the sealing ring 210 and enable the pin 160 to rotate flexibly.

[0036] Example 3:

[0037] Combine Figure 1-2 As shown, in the above embodiment, a plurality of threaded rods 400 are inserted into the needle tooth holding shell 110 , and nuts are screwed onto the outer ends of the threaded rods 400 . The threaded rods 400 cooperate with the nuts to increase the structural strength of the needle tooth holding shell 110 .

[0038] The working principle and usage process of the present invention are as follows: when the device is put into actual use, the rotating shaft 120 rotates the cycloid wheel 140 and the cycloid wheel 2 150 through the two eccentric bearings 130, and then the pin 160 and the needle tooth 170 limit the cycloid wheel 140 and the cycloid wheel 2 150, reducing the amplitude of the activities of the two and making the rotation of the two more stable. During this process, the sealing ring 210 is blocked between the cycloid wheel 140 and the cycloid wheel 2 150, which reduces the friction between the two to a certain extent. Then, each time the multiple pins 160 are squeezed into the oil chamber 220 position, the lubricating oil will flow out from the oil outlet 240, and then lubricate the cycloid wheel 140 and the cycloid wheel 2 150, making the rotation of the two smoother and effectively reducing the noise during the rotation of the two.

[0039] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A low-noise cycloid gear structure, characterized in that: include: A speed reduction mechanism (100), comprising a needle tooth holding housing (110), a rotating shaft (120) arranged inside the needle tooth holding housing (110), two eccentric bearings (130) sleeved on the outside of the rotating shaft (120), a cycloid wheel 1 (140) and a cycloid wheel 2 (150) movably sleeved on the outside of the two eccentric bearings (130), a plurality of pins (160) movably passing through the cycloid wheel 2 (150) and connected to the cycloid wheel 1 (140), and a plurality of needle teeth (170) installed inside the needle tooth holding housing (110), wherein the outer walls of the cycloid wheel 1 (140) and the outer walls of the cycloid wheel 2 (150) are both in contact with the outer walls of the needle teeth (170); A noise reduction mechanism (200) includes a sealing ring (210) fitted between the first cycloid wheel (140) and the second cycloid wheel (150), a plurality of oil chambers (220) provided on the sealing ring (210), an oil plug (230) plugged into the oil chambers (220), and two oil outlet holes (240) provided on the inner side of the sealing ring (210) and communicating with the interior of the oil chambers (220).

2. A low-noise cycloid gear structure according to claim 1, characterized in that: A plurality of pins (160) are arranged in a ring shape at equal intervals, and the outer wall of the pin (160) is in interference fit with the inner edge of the sealing ring (210).

3. The low-noise cycloid gear structure according to claim 1, characterized in that: The second cycloid wheel (150) is located outside the first cycloid wheel (140), and the sum of the thicknesses of the first cycloid wheel (140) and the second cycloid wheel (150) is equal to the length of the needle teeth (170).

4. The low-noise cycloid gear structure according to claim 1, characterized in that: The sealing ring (210) is provided with a plurality of openings (300), the plurality of openings (300) are arranged at equal intervals and in a ring shape, and the plurality of openings (300) and the plurality of oil chambers (220) are arranged in a staggered manner.

5. The low-noise cycloid gear structure according to claim 1, characterized in that: A plurality of threaded rods (400) are plugged into the needle tooth retaining housing (110), and nuts are screwed onto the outer ends of the threaded rods (400).

6. The low-noise cycloid gear structure according to claim 1, characterized in that: An annular groove is provided on the outer side of the oil plug (230), and the oil plug (230) is clamped with the sealing ring (210) through the annular groove.

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