TWI745969B - Gear reducer lubricating structure - Google Patents

Abstract

The present disclosure provides a gear reducer lubricating structure including a carrier, a planetary gear and a spacer. The carrier includes a frame body and a pivotal shaft disposed at the frame body. The planetary gear is pivotally disposed at the carrier and includes a main body, a bore and an oil groove. The main body includes an end surface. The bore penetrates the main body and allows the pivotal shaft to insert thereinto. The oil groove is disposed at the end surface and communicates with the bore. The spacer is located between the frame body and the end surface. When the planetary gear relative to the spacer and the carrier is turning, it will cause changes of an overlapped range between the spacer and the oil groove and enable to pump the lubricating oil into the oil groove. Hence, the lubricating oil is actively pumped into the oil groove, thereby flowing into the bore, and the lubricating effect is highly increased.

Description

Gear reducer lubrication structure

The present invention relates to a lubricating structure, and in particular to a lubricating structure of a gear reducer.

The advancement of science and technology has led to the development of technology. Various power or automated machines have replaced traditional human tools and are widely used in life, which has improved the convenience of human society. Motors are the most common source of power.

Generally speaking, the speed of the motor is faster. Therefore, in the structural configuration, a reducer will be used to reduce the speed of the driven element, especially the gear reducer, which can change the speed ratio through the configuration of the tooth pitch to reduce the speed. The role of. In order to reduce the wear of the gear reducer and increase its service life, the industry will add lubricating oil to the gear reducer and open a thin groove communicating with the shaft hole on the gear end surface to allow the lubricating oil to flow into the shaft hole. Improve the lubrication effect. However, the viscosity of lubricating oil is relatively high and it is not easy to flow into the shaft hole from the fine groove, resulting in poor lubrication effect, so there is still room for improvement.

In view of this, how to improve the lubrication structure of the gear reducer and enhance its lubrication effect has become the goal of the relevant industry.

In order to solve the above-mentioned problems, the present invention provides a lubricating structure for a gear reducer, which can improve the lubricating effect through the structure configuration.

According to one embodiment of the present invention, a gear reducer lubrication structure is provided, which includes a planet carrier, at least one planet gear, and at least one gasket. The planet carrier includes a carrier body and at least one pivot, and the aforementioned at least one pivot is disposed on the carrier body. The aforementioned at least one planetary gear is pivoted on the planet carrier and includes a body, a shaft hole and at least one oil supplement groove. The main body includes an end surface, the shaft hole penetrates the main body and the pivot shaft passes through, and the aforementioned at least one oil supplement groove is provided on the end surface and communicates with the shaft hole. The aforementioned at least one gasket is located between the carrier body and the end surface of the aforementioned at least one planetary gear. Wherein, the aforementioned at least one planetary gear rotates relative to the aforementioned at least one gasket and the planet carrier to change an overlapping range of the aforementioned at least one gasket and the aforementioned at least one oil supplement groove, so as to press a lubricating oil into the aforementioned at least one oil supplement groove.

Thereby, the lubricating oil can be actively pressed into the oil supplement groove, and then flow into the shaft hole, so that the lubricating effect can be improved.

According to the aforementioned plural embodiments of the lubrication structure of the gear reducer, the at least one oil supplement groove may be arc-shaped and have a center, and the center of the at least one oil supplement groove and a central axis of the shaft hole of the at least one planetary gear dislocation.

According to the aforementioned plural embodiments of the lubricating structure of the gear reducer, the aforementioned at least one shim may have a truncated triangle shape.

According to the aforementioned plural embodiments of the lubricating structure of the gear reducer, the aforementioned at least one shim may have an oval shape.

According to the aforementioned plural embodiments of the lubricating structure of the gear reducer, the aforementioned at least one gasket can be generally in the shape of a notched disc.

According to the aforementioned plural embodiments of the lubrication structure of the gear reducer, the body may include a convex ring located on the end surface and surrounding the shaft hole, and the convex ring is partially cut to be recessed to form the aforementioned at least one oil supplement groove.

According to the aforementioned plural embodiments of the lubrication structure of the gear reducer, a first radial length of the at least one gasket may be approximately equal to an outer radius of the convex ring, and the first radial length is equal to the circumference of the at least one gasket. The maximum vertical distance from a central axis of the shaft hole.

According to the aforementioned plural embodiments of the lubrication structure of the gear reducer, the planet carrier may further include at least one concave portion located in the carrier body, wherein the aforementioned at least one gasket is located in the aforementioned at least one concave portion.

According to the aforementioned plural embodiments of the lubricating structure of the gear reducer, a depth of the at least one recess may be smaller than a thickness of the at least one gasket.

According to the aforementioned plural embodiments of the lubrication structure of the gear reducer, wherein a first radial length of the at least one gasket may be greater than or equal to a second radial length of the at least one oil supplement groove, and the first radial length is The maximum vertical distance between the peripheral edge of the at least one gasket and a central axis of the shaft hole, and the second radial length is the maximum vertical distance between the peripheral edge of the at least one oil supplement groove and the central axis.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. For the sake of clarity, many practical details will be explained in the following description. However, the reader should understand that these practical details should not be used to limit the present invention. That is to say, in some embodiments of the present invention, these practical details are unnecessary. In addition, for the sake of simplification of the drawings, some conventionally used structures and elements will be drawn in a simple schematic manner in the drawings; and repeated elements may be represented by the same or similar numbers.

In addition, when a component (or mechanism or module, etc.) is “connected”, “configured” or “coupled” to another component in this document, it can mean that the component is directly connected, directly disposed, or directly coupled to another component It can also mean that an element is indirectly connected, indirectly disposed, or indirectly coupled to another element, that is, there are other elements between the element and another element. When it is clearly stated that a certain element is "directly connected", "directly arranged" or "directly coupled" to another element, it means that there is no other element between the element and another element. The terms first, second, third, etc. are only used to describe different elements or components, and have no limitation on the elements/components themselves. Therefore, the first element/component can also be referred to as the second element/component. And the combination of components/components/mechanisms/modules in this article is not a combination of general well-known, conventional or conventional in this field. Whether the component/component/mechanism/module itself is conventional or not can not be used to determine whether the combination relationship is It can be easily completed by ordinary knowledgeable persons in the technical field.

Please refer to Figure 1, Figure 2, and Figure 3, where Figure 1 is a perspective schematic view of a gear reducer lubricating structure 10 according to a first embodiment of the present invention, and Figure 2 shows the first A partial perspective view of the lubricating structure 10 of the gear reducer of the embodiment. FIG. 3 is a schematic diagram of the pivot 120, the roller 500, the planetary gear 200, and the gasket 300 of the first embodiment in FIG. The gear reducer lubricating structure 10 includes a planet carrier 100, at least one planet gear 200 and at least one gasket 300.

The planet carrier 100 includes a carrier body 110 and at least one pivot 120, and the aforementioned at least one pivot 120 is disposed on the carrier body 110. The aforementioned at least one planet gear 200 is pivoted on the planet carrier 100 and includes a body 210, a shaft hole 230 and at least one oil supplement groove 220. The main body 210 includes an end surface 211, the shaft hole 230 penetrates the main body 210 and allows the pivot 120 to pass through. The aforementioned at least one oil supplement groove 220 is provided on the end surface 211 and communicates with the shaft hole 230. The aforementioned at least one gasket 300 is located between the carrier 110 and the end surface 211 of the aforementioned at least one planetary gear 200. Wherein, the aforementioned at least one planetary gear 200 rotates relative to the aforementioned at least one gasket 300 and the planet carrier 100 to change an overlapping range A1 of the aforementioned at least one gasket 300 and the aforementioned at least one oil supplement groove 220 (shown in Figs. 5 and 6 ) To press a lubricating oil into the aforementioned at least one oil supplement groove 220.

Thereby, the lubricating oil can be actively pressed into the oil supplement groove 220, and then flow into the shaft hole 230, so that the lubricating effect can be improved. The details of the lubricating structure 10 of the gear reducer will be described later.

The gear reducer lubrication structure 10 may further include a housing 400 and a sun gear shaft 600. The housing 400 includes a plurality of internal teeth (not shown). The planet carrier 100 may be a cage planet carrier, so the carrier body 110 may include a The cage 111 and an output shaft 112 are located in the housing 400, and the output shaft 112 is connected to the cage 111 and protrudes toward the outside of the housing 400. The cage 111 includes a first installation surface 1111 and a second installation surface 1112 arranged at intervals and opposite to each other. The number of the front at least one pivot 120 can be three and are arranged at intervals on the first installation surface 1111 and the second installation surface. 1112, the number of the aforementioned at least one planetary gear 200 is also three, and they are respectively pivoted on the three pivots 120, and are located between the first setting surface 1111 and a second setting surface 1112, and the three planetary gears 200 are engaged于内牙。 In the internal teeth. The sun gear shaft 600 can be located in the cage 111 and meshed with the three planetary gears 200. Therefore, when a motor (not shown) drives the sun gear shaft 600, the planetary gears 200 are linked to rotate to drive the planet carrier 100 to rotate relative to the housing 400.

The lubricating structure 10 of the gear reducer may further include a plurality of rollers 500, and a roller 500 may be arranged between each shaft hole 230 and each pivot 120 to reduce the friction between the planetary gear 200 and the pivot 120.

Please refer to FIG. 4, and also refer to FIG. 2 and FIG. 3. FIG. 4 is a partial cross-sectional view of the lubricating structure 10 of the gear reducer according to the first embodiment in FIG. The body 210 of the planetary gear 200 may include a plurality of helical teeth (not labeled) to mesh with the inner teeth of the sun gear shaft 600 and the housing 400. The planetary gear 200 may include two oil replenishment grooves 220 located on the end faces 211 on both sides, respectively corresponding to the first One setting surface 1111 and second setting surface 1112, but the number of oil supplement grooves 220 on one end surface 211 can also be more than one, which does not limit the present invention. The body 210 may further include a convex ring 240 located on the end surface 211 and surrounding the shaft hole 230. The convex ring 240 may be partially cut to form an oil supplement groove 220. As shown in FIG. 3, only one oil supplement groove 220 is located on the same end surface 211 superior. The oil supplement groove 220 is arc-shaped and has a center C1, and the center C1 of the oil supplement groove 220 is misaligned with a central axis I1 of the shaft hole 230 of the planetary gear 200. The periphery of the oil supplement groove 220 may be a circular arc with a center C1, so the oil supplement groove 220 is actually an eccentric circle eccentric to the shaft hole 230. The oil supplement groove 220 of this shape has the advantages of easy processing and shorter processing time. In other embodiments, the oil supplement groove can also have other shapes, which does not limit the present invention.

When the planetary gear 200 is disposed on the planet carrier 100, since the shim 300 is located between the planetary gear 200 and the first setting surface 1111 or the second setting surface 1112, an oil containing space S1 can be generated to accommodate lubricating oil. In order to increase the oil holding space S1, the planet carrier 100 may further include at least one recess 130 located on the carrier body 110. In the first embodiment, the number of the recesses 130 may be six, and the three recesses 130 are arranged at intervals in the first arrangement. On the surface 1111, the other three recesses 130 are arranged at intervals on the second setting surface 1112, the number of the aforementioned at least one gasket 300 is six, and each gasket 300 is located in each recess 130. The area of the recess 130 is greater than the area of the gasket 300, and a depth D1 of the recess 130 may be less than a thickness D2 of the gasket 300. In other words, when the gasket 300 is located on the recess 130, the gasket 300 will protrude from the recess. 130. A first radial length L1 of the gasket 300 (marked in Figure 5) may be approximately equal to an outer radius of the convex ring 240, and the first radial length L1 is the distance between the circumference of the gasket 300 and the central axis I1 of the shaft hole 230 Maximum vertical distance. Under this structure, the oil containing space S1 between the end surface 211 and the recess 130 can be enlarged, which helps to contain more lubricating oil.

In the first embodiment, the gasket 300 may be adhered to the first installation surface 1111 and the second installation surface 1112. However, in other embodiments, the first installation surface and the second installation surface may also be provided with a mating surface. The groove is used for the gasket to fit, not limited to this.

Please refer to Figures 5 and 6, where Figure 5 shows a schematic front view of the planetary gear 200 and spacer 300 of the first embodiment in Figure 1, and Figure 6 shows the planet of the first embodiment in Figure 1. Another schematic front view of the gear 200 and the washer 300. At the beginning, the overlap range A1 of the planetary gear 200 and the gasket 300 is as shown in Figure 5. At this time, the arc top of the oil replenishment groove 220 exposes the gasket 300, and the lubricating oil can flow into the oil replenishment groove 220 from the arc top, but it is limited by The viscosity of the lubricating oil makes it difficult for the lubricating oil to penetrate deeply into the oil replenishment tank 220. When the planetary gear 200 rotates in the direction R1 relative to the shim 300, the overlap range A1 of the planetary gear 200 and the shim 300 is changed as shown in Fig. 6. At this time, the contact area of the shim 300 and the oil supplement groove 220 changes. The pressure, in turn, presses the lubricating oil into the oil replenishment groove 220, which helps to allow the lubricating oil to penetrate into the oil replenishment groove 220 and flow into the shaft hole 230. In particular, because the planetary gear 200 is a helical gear structure, it can generate axial thrust to squeeze the lubricating oil and the gasket 300 when rotating, which can further help improve the oil replenishment capability.

In addition, as shown in Figures 5 and 6, the gasket 300 can be approximately a truncated triangle, the first radial length L1 of the gasket 300 can be greater than or equal to the second radial length L2 of the oil supplement groove 220, and the second The radial length L2 is the maximum vertical distance between the peripheral edge of the oil supplement groove 220 and the central axis I1 of the shaft hole 230. Under this configuration, the ability of the gasket 300 to press the lubricating oil into the oil supplement groove 220 can be improved.

Please refer to Figures 7 and 8, where Figure 7 shows a front view of a planetary gear 200a and a gasket 300a of a gear reducer lubricating structure according to a second embodiment of the present invention, and Figure 8 shows Fig. 7 is another schematic front view of the planetary gear 200a and the gasket 300a of the second embodiment. The planetary gear 200a includes an oil replenishment groove 220a, and the structure of the oil replenishment groove 220a is the same as that of the oil replenishment groove 220 in FIGS. The gasket 300a may be in the shape of a notched disc and includes three notches 310a, and the notches 310a are matched with the oil replenishment groove 220a to produce an oil replenishment effect.

Please refer to FIG. 9, where FIG. 9 is a schematic front view of a planetary gear 200b and a gasket 300b of a lubricating structure of a gear reducer according to a third embodiment of the present invention. The planetary gear 200b includes an oil replenishment groove 220b, and the gasket 300b may also have an oval shape.

Please refer to FIG. 10. FIG. 10 is a schematic front view of a planetary gear 200 c and a gasket 300 c of a lubricating structure of a gear reducer according to a fourth embodiment of the present invention. The planetary gear 200c includes two oil supplement grooves 220c arranged symmetrically, and the gasket 300c can also be roughly rectangular with arc edges on both sides.

It should be noted here that the aforementioned gaskets 300, 300a, 300b, and 300c can be made by stamping and forming, and can be configured in any shape, and the gaskets 300, 300a, 300b, and 300c can be made of wear-resistant materials , In order to increase the life span, however, the above description is only one of the implementation methods, and the present invention is not limited by this.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention. Anyone familiar with the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection of the present invention The scope shall be subject to the definition of the attached patent application scope.

10: Lubrication structure of gear reducer 100: planet carrier 110: frame 111: Cage 1111: The first setting surface 1112: The second setting surface 112: output shaft 120: pivot 130: recess 200, 200a, 200b, 200c: planetary gear 210: body 211: end face 220, 220a, 220b, 220c: oil supply tank 230: shaft hole 240: convex ring 300, 300a, 300b, 300c: Gasket 400: shell 500: roller 600: Sun wheel shaft 310a: gap A1: Overlapping range C1: Center of circle D1: depth D2: thickness I1: Central axis L1: first radial length L2: second radial length R1: direction S1: Oil-holding space

Figure 1 is a three-dimensional schematic diagram of a lubricating structure of a gear reducer according to a first embodiment of the present invention; Figure 2 is a partial perspective view of the lubricating structure of the gear reducer of the first embodiment in Figure 1; Figure 3 shows a schematic diagram of the pivot, rollers, planetary gears and spacers of the first embodiment in Figure 1; Figure 4 is a schematic partial cross-sectional view of the lubricating structure of the gear reducer of the first embodiment in Figure 1; Figure 5 shows a schematic front view of the planetary gears and spacers of the first embodiment in Figure 1; Fig. 6 is another schematic front view of the planetary gear and gasket of the first embodiment in Fig. 1; Figure 7 is a schematic front view of a planetary gear and a gasket of a lubricating structure of a gear reducer according to a second embodiment of the present invention; Fig. 8 shows another schematic front view of the planetary gear and gasket of the second embodiment in Fig. 7; Fig. 9 is a schematic front view of a planetary gear and a gasket of a lubricating structure of a gear reducer according to a third embodiment of the present invention; and FIG. 10 is a schematic front view of a planetary gear and a gasket of a lubricating structure of a gear reducer according to a fourth embodiment of the present invention.

120: pivot

200: Planetary gear

210: body

211: end face

220: oil supply tank

230: shaft hole

240: convex ring

300: Gasket

500: roller

Claims (9)

A gear reducer lubrication structure includes: a planet carrier, including: a carrier; and at least one pivot, arranged on the carrier; at least one planetary gear, pivoted on the planet carrier and including: a body, including a An end surface; a shaft hole that penetrates the body and allows the at least one pivot to pass through; and at least one oil supplement groove is provided on the end surface and communicates with the shaft hole; and at least one gasket located between the carrier body and the at least one planetary gear Between the end surfaces; wherein a first radial length of the at least one gasket is greater than or equal to a second radial length of the at least one oil supplement groove, and the first radial length is the circumference of the at least one gasket and The maximum vertical distance between a central axis of the shaft hole, the second radial length is the maximum vertical distance between the peripheral edge of the at least one oil supplement groove and the central axis, and the at least one planetary gear is opposite to the at least one gasket and the The planet carrier rotates to press a lubricating oil into the at least one oil supplement groove. The gear reducer lubrication structure according to claim 1, wherein the at least one oil supplement groove is arc-shaped and has a center, and the center of the at least one oil supplement groove and the center of the shaft hole of the at least one planetary gear The axis is misaligned. The gear reducer lubrication structure as described in claim 1, which Among them, the at least one gasket is roughly a truncated triangle. The gear reducer lubrication structure according to claim 1, wherein the at least one gasket is generally oval. The gear reducer lubrication structure according to claim 1, wherein the at least one gasket is generally in the shape of a notched disc. The gear reducer lubrication structure according to claim 1, wherein the body further includes a convex ring located on the end surface and surrounding the shaft hole, and the convex ring is partially cut to be recessed to form the at least one oil supplement groove. The gear reducer lubrication structure according to claim 6, wherein the first radial length of the at least one gasket is approximately equal to an outer radius of the convex ring. The gear reducer lubrication structure according to claim 1, wherein the planet carrier further comprises: at least one concave portion located in the carrier body; wherein the at least one gasket is located in the at least one concave portion. The gear reducer lubrication structure according to claim 8, wherein a depth of the at least one recess is smaller than a thickness of the at least one gasket.

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