A damped rolling linear guide pair

Abstract

This invention relates to a damped rolling linear guide pair, comprising a linear guide, a slider that mates with the linear guide, and a roller disposed between the linear guide and the slider; the slider has an oil cavity, and an injection-molded layer is provided at the sliding contact point between the slider and the linear guide. An oil hole communicating with the oil cavity is formed on the injection-molded layer, and lubricating oil in the oil cavity flows out through the oil hole, forming an oil film damping layer between the injection-molded layer and the linear guide. Through the oil film damping effect, the damping, vibration resistance, and load-bearing performance of the rolling linear guide pair can be improved, ensuring the smoothness and accuracy of the guide pair during use.

Description

Technical Field

[0001] This invention relates to a damped rolling linear guide pair, belonging to the technical field of rolling linear guide pairs. Background Technology

[0002] Traditional linear guide pairs have point / line contact between the rolling elements and raceways. While this results in high contact stiffness, the extremely low damping makes the system prone to self-excited vibration. This vibration directly affects the surface roughness and dimensional accuracy of the machined parts, especially under high-speed and hard cutting conditions. Although dampers for linear guide pairs currently available on the market offer damping and vibration reduction, they require additional configuration. As various industries in my country move towards mid-to-high-end development, industries such as machine tools, semiconductors, medical devices, and new energy urgently need rolling linear guide pairs that offer stable operation, higher precision, and longer lifespan. Summary of the Invention

[0003] In order to solve the problems existing in the prior art, the present invention proposes a damped rolling linear guide pair that can improve damping and vibration resistance performance without the need for additional dampers.

[0004] To achieve the above objectives, the technical solution proposed by this invention is as follows: A damped rolling linear guide pair includes a linear guide, a slider that cooperates with the linear guide, and a roller disposed between the linear guide and the slider; the slider has an oil cavity, and the slider has an injection-molded layer at the sliding contact point with the linear guide. The injection-molded layer has an oil hole communicating with the oil cavity, and the lubricating oil in the oil cavity flows out through the oil hole, forming an oil film damping layer between the injection-molded layer and the linear guide.

[0005] A further design of the above technical solution is as follows: the slider is provided with an oil inlet communicating with the oil cavity, and a quick-connect straight pipe connector is provided at the oil inlet.

[0006] A retainer is also provided between the linear guide rail and the slider, and the lubricating oil flowing out through the oil hole forms an oil film damping layer between the retainer and the linear guide rail.

[0007] A roller raceway is formed between the linear guide and the slider, and the lubricating oil flowing out through the oil hole can enter the roller raceway for lubrication.

[0008] The slider is equipped with a return device at both ends.

[0009] Compared with the prior art, the present invention has the following advantages: The present invention has an oil cavity inside the slider. The lubricating oil in the oil cavity flows out through the oil hole of the injection layer and is squeezed between the injection layer and the linear guide to form an oil film damping layer. Through the oil film damping effect, the damping and vibration resistance of the rolling linear guide pair can be improved, ensuring the smoothness and accuracy of the guide pair during use.

[0010] In addition to the raceway, the present invention provides an injection molding layer between the slider and the guide rail. At the same time, due to the oil pressure in the oil film between the injection molding layer and the guide rail, the damped rolling linear guide pair has a higher load capacity.

[0011] In this invention, the oil film is positioned between the injection molding layer and the linear guide rail. Compared to the slider, the injection molding layer has better lubricating oil permeability, which is more conducive to maintaining the stability of the oil film and prevents excessive overflow due to compression, thereby providing a lasting damping and vibration reduction effect. On the other hand, because the oil film is more stable, the equivalent stiffness of the oil film damping layer is close to linear, reducing the nonlinear effect of the oil film stiffness, improving the system's ability to withstand unbalance, and significantly reducing the damping and vibration reduction effect on the guide rail pair.

[0012] In this invention, the lubricating oil flowing out from the oil holes in the injection molding layer can also enter the roller raceway to provide lubrication, so that the guide rail pair does not need additional lubrication and the service life of the guide rail pair is increased. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the linear guide pair of the present invention; Figure 2 This is a side view of the linear guide pair of the present invention; Figure 3 This is a side view of the slider. Figure 4 This is a bottom view of the slider. Figure 5 Schematic diagram of the cage; In the diagram: 1-Linear guide, 2-Returner, 3-Slider, 4-Quick-connect straight pipe connector, 5-Roller, 6-Cage, 7-Injection layer, 8-Oil hole. Detailed Implementation

[0014] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0015] In the description of the embodiments of the present invention, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are used only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. The accompanying drawings are schematic diagrams or conceptual diagrams, and the relationships between the thickness and width of each part, as well as the proportional relationships between each part, etc., are not entirely consistent with their actual values. Example

[0016] The damped rolling linear guide pair in this embodiment, such as Figure 1 As shown, it includes a linear guide rail 1, a slider 3 that cooperates with the linear guide rail 1, and a roller 5 disposed between the linear guide rail 1 and the slider 3.

[0017] Combination Figure 2 As shown, a retainer 6 is also provided between the linear guide 1 and the slider 3, such as... Figure 5 As shown, the slider 3 has a return device 2 at both ends.

[0018] Combination Figure 3 As shown, the slider 3 in this embodiment has an oil cavity, and the slider 3 has an injection-molded layer 7 at the sliding contact point with the linear guide rail 1, which facilitates control of the gap between the linear guide rail 1 and the slider 3, preventing hard contact. Figure 4 As shown, the injection molding layer 7 has an oil hole 8 communicating with the oil cavity, and the slider 3 has an oil inlet communicating with the oil cavity. The oil inlet is equipped with a quick-connect straight pipe connector 4. The lubricating oil enters the oil cavity inside the slider 3 through the quick-connect straight pipe connector 4 and can be stored without frequent oiling. The lubricating oil eventually flows out slowly from the oil hole 8 of the injection molding layer 7 and is squeezed between the injection molding layer 7 and the linear guide 1, and between the cage 6 and the linear guide 1 to form an oil film damping layer. Through the oil film damping effect, the damping and vibration resistance of the rolling linear guide pair is improved, ensuring the smoothness and accuracy of the guide pair during use.

[0019] Because the injection-molded layer has excellent permeability to lubricating oil, it is more conducive to maintaining the stability of the oil film. Therefore, in this embodiment, the lubricating oil forming the oil film is less likely to overflow excessively due to compression, and the oil film damping layer can be maintained for a longer period of time, thus providing a lasting damping and vibration reduction effect. Furthermore, because the oil film is more stable, the equivalent stiffness of the oil film damping layer is close to linear, reducing the nonlinear effect of the oil film stiffness and improving the system's ability to withstand unbalanced loads, resulting in a significant damping and vibration reduction effect on the guide rail pair. In this embodiment, the injection-molded layer has a frosted surface facing the linear guide rail, further improving the permeability of the injection-molded layer to lubricating oil and further ensuring the stability of the oil film. If the injection-molded layer is not provided in this embodiment, there is direct rigid contact between the slider and the guide rail, with lubricating oil forming between them. Since there is no permeability between the lubricating oil and the metal material, the lubricating oil forming the oil film is easily overflowed due to compression, accelerating the consumption of lubricating oil, failing to maintain the stability of the oil film damping layer, and being detrimental to maintaining the linear stiffness of the oil film damping layer.

[0020] In addition, the lubricating oil that slowly flows out from the oil holes 8 of the injection layer 7 can directly enter the roller raceway between the linear guide and the slider, and cover the roller raceway, providing lubrication for the rollers 5 in the raceway. This eliminates the need for additional lubrication of the guide pair and increases its service life. In this embodiment, since an oil film damping layer is formed between the injection layer 7 and the linear guide 1, and between the cage 6 and the linear guide 1, the rollers, slider (injection layer), and guide are all covered with lubricating oil, achieving sufficient lubrication, higher precision retention, and longer service life.

[0021] In this embodiment, the oil cavity inside the slider 3 can automatically supply lubricating oil for a long time, ensuring the long-term effectiveness of oil film damping and lubrication.

[0022] The preferred embodiments of the present invention have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of the present invention without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of the present invention through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. A damped rolling linear guide pair, comprising a linear guide, a slider cooperating with the linear guide, and a roller disposed between the linear guide and the slider; characterized in that: The slider has an oil cavity inside, and the slider has an injection molding layer at the sliding contact point with the linear guide rail. The injection molding layer has an oil hole that communicates with the oil cavity. The lubricating oil in the oil cavity flows out through the oil hole, forming an oil film damping layer between the injection molding layer and the linear guide rail.

2. The damped rolling linear guide pair according to claim 1, characterized in that: The slider is provided with an oil inlet that communicates with the oil chamber, and a quick-connect straight pipe connector is provided at the oil inlet.

3. The damped rolling linear guide pair according to claim 2, characterized in that: A retainer is also provided between the linear guide rail and the slider, and the lubricating oil flowing out through the oil hole forms an oil film damping layer between the retainer and the linear guide rail.

4. The damped rolling linear guide pair according to claim 3, characterized in that: A roller raceway is formed between the linear guide and the slider, and the lubricating oil flowing out through the oil hole can enter the roller raceway for lubrication.

5. The damped rolling linear guide pair according to any one of claims 1 to 4, characterized in that: The slider is equipped with a return device at both ends.

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