A vacuum fully sealed linear guide

Abstract

The present invention provides a vacuum fully sealed linear guide rail, which relates to the field of mechanical sealing technology. The vacuum fully sealed linear guide rail includes a moving part, a fixed part, a telescopic tube part and a linear guide rail body. The linear guide rail body includes a slider and a guide rail. The slider is slidably connected to the guide rail. Two fixed parts are respectively connected to the two ends of the guide rail. The moving part is connected to the slider and is sleeved outside the slider and the guide rail. Telescopic tube parts are respectively provided between the two fixed parts and the moving part. The telescopic tube parts are sleeved on the guide rail. The two ends of the telescopic tube parts are connected to the moving part and the corresponding fixed parts. The present invention forms a fully wrapped seal for the slider and the guide rail, preventing the lubricating medium from volatilizing from the inside to the outside, avoiding the waste of the lubricating medium, ensuring the durability of the lubrication effect, and preventing external dust and grinding chips from entering the interior of the guide rail from the outside to the inside, reducing the friction or wear of the guide rail, and extending the service life of the guide rail.

Description

Technical Field

[0001] The present invention relates to the technical field of mechanical seals, and in particular to a vacuum fully sealed linear guide rail. Background Art

[0002] In the field of precision instruments and mechanical technology, linear guide bodies are a common assembly component used to achieve smooth movement of objects in a straight line. With the continuous improvement of my country's scientific and technological level, vacuum technology is being used more and more widely in scientific research, industrial production and other fields, and the application background of vacuum mechanical lubrication guides is becoming increasingly important. This article involves a vacuum fully sealed linear guide body whose seal can prevent dust, impurities and liquids from entering the interior of the guide rail, preventing them from causing poor operation of the guide rail. In addition, a lubricating medium is required between the moving elements and the fixed elements of the linear guide body to reduce friction and wear. The lubricating medium includes liquid (lubricating oil), semi-solid and solid.

[0003] Liquid lubrication is a common lubrication method for linear guides. Vacuum liquid lubrication guide technology provides effective lubrication for mechanical equipment in a vacuum environment, reducing friction and wear between moving parts, and has important applications in multiple fields. When a device equipped with a linear guide operates in a sub-zero temperature environment, the lubricant on the guide rail will leak, evaporate, and eventually condense on the surface of some devices (such as imaging devices). This will not only reduce the guide rail's lubrication effect, but also cause dust, wear debris, and other debris to adhere to the surface of the device (such as the imaging device), making it difficult to ensure the reliability of the device. Summary of the Invention

[0004] The problem solved by the present invention is how to improve the reliability of a device equipped with a linear guide rail.

[0005] In order to solve the above problems, the present invention provides a vacuum fully sealed linear guide rail.

[0006] The present invention provides a vacuum fully sealed linear guide rail, comprising a moving part, a fixed part, a telescopic tube part and a linear guide rail body, wherein the linear guide rail body comprises a slider and a guide rail, wherein the slider is slidably connected to the guide rail, and the two fixed parts are respectively connected to the two ends of the guide rail, and the moving part is connected to the slider and is sleeved outside the slider and the guide rail, and the telescopic tube parts are respectively provided between the two fixed parts and the moving part, and the telescopic tube parts are sleeved on the guide rail, and the two ends of the telescopic tube parts are connected to the moving part and the corresponding fixed parts.

[0007] Optionally, the telescopic tube component comprises a rubber bellows.

[0008] Optionally, both ends of the rubber bellows are turned outward to form an annular mounting portion, and the annular mounting portions at both ends are respectively connected to the moving component and the fixed component.

[0009] Optionally, in a natural state without external force, the two rubber bellows have the same length.

[0010] Optionally, the telescopic tube component further includes a sealing ring, which is pressed tightly against the annular mounting portion, and the sealing ring and the annular mounting portion are connected to the moving component or the fixed component via screws.

[0011] Optionally, the guide rail includes a base plate and a track portion, both ends of the base plate are respectively connected to the two fixing components, the track portion is connected to the base plate, the slider is slidably connected to the track portion, and the length of the track portion is less than the length of the base plate.

[0012] Optionally, the base plate is connected to the fixing component via screws.

[0013] Optionally, the rail portion is connected to the base plate via screws.

[0014] Optionally, the moving component includes a moving block, the cross section of the moving block is a rectangular structure, the moving block is provided with a connecting through hole, the moving block is sleeved outside the guide rail and the slider through the through hole, and the moving block is connected to the slider.

[0015] Optionally, the moving component is connected to the slider via screws.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] By inserting at least a portion of the slider and the guide rail into the moving component, and sleeved with a telescopic tube component over the portion of the slider and the guide rail that does not penetrate the moving component, and connecting the two ends of the telescopic tube component between the opposing surfaces of the moving component and the fixed component, when the moving component drives the slider to move back and forth along the extension direction of the guide rail, the moving component can always wrap a portion of the slider and the guide rail inside. At the same time, the moving component causes the corresponding telescopic tube component to undergo tensile or compressive deformation, so that the other portion of the slider and the guide rail is also always wrapped within the telescopic tube component. Thus, the moving component and the telescopic tube component form a fully wrapped seal for the slider and the guide rail, preventing the lubricating medium from evaporating or leaking from the inside to the outside, avoiding waste of the lubricating medium, ensuring the durability of the lubrication effect, and preventing external dust and debris from entering the guide rail from the outside to the inside, reducing friction or wear of the guide rail, and extending the service life of the guide rail. In addition, it can also prevent the lubricating medium from adhering to the surfaces of other components in the device, thereby avoiding degradation of the performance of other components. In summary, this embodiment can effectively improve the reliability of a device equipped with a linear guide rail. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Schematic diagram of the structure of an embodiment of the present invention;

[0019] Figure 2 2 is a cross-sectional view of an embodiment of the present invention.

[0020] Description of reference numerals:

[0021] 1. Moving part; 2. Fixed part; 3. Telescopic tube part; 31. Rubber bellows; 311. First rubber bellows; 312. Second rubber bellows; 321. First sealing ring; 322. Second sealing ring; 323. Third sealing ring; 324. Fourth sealing ring; 4. Linear guide body; 41. Slider; 42. Guide rail; 421. Base plate; 422. Track part. DETAILED DESCRIPTION

[0022] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0023] In the description of the present invention, it should be noted that, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0024] Throughout this specification, reference to terms such as "an embodiment," "one embodiment," "some embodiments," "exemplarily," and "one embodiment" means that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or embodiment are included in at least one embodiment or embodiment of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or embodiment. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or embodiments.

[0025] The terms "first," "second," etc. are used for descriptive purposes only and should not be understood to indicate or imply relative importance or to implicitly specify the quantity of the technical features indicated. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one of the features.

[0026] In the accompanying drawings, the Z-axis represents the vertical direction, that is, the up-down position, with the positive direction of the Z-axis representing the up position and the negative direction of the Z-axis representing the down position. In the accompanying drawings, the X-axis represents the horizontal direction and is designated as the left-right position, with the positive direction of the X-axis representing the left position and the negative direction of the X-axis representing the right position. In the accompanying drawings, the Y-axis represents the front-back position, with the positive direction of the Y-axis representing the front side and the negative direction of the Y-axis representing the back side. It should also be noted that the aforementioned Z-axis, Y-axis, and X-axis are merely for the purpose of facilitating the description of the present invention and simplifying the description, and are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0027] like Figure 1 and Figure 2 As shown, an embodiment of the present invention provides a vacuum fully sealed linear guide, comprising a moving component 1, a fixed component 2, a telescopic tube component 3 and a linear guide body 4. The linear guide body 4 comprises a slider 41 and a guide rail 42. The slider 41 is slidably connected to the guide rail 42. The two fixed components 2 are respectively connected to the two ends of the guide rail 42. The moving component 1 is connected to the slider 41 and is sleeved outside the slider 41 and the guide rail 42. Telescopic tube components 3 are respectively provided between the two fixed components 2 and the moving component 1. The telescopic tube components 3 are sleeved on the guide rail 42. The two ends of the telescopic tube component 3 are connected to the moving component 1 and the corresponding fixed component 2.

[0028] In this embodiment, by at least partially passing the slider 41 and the guide rail 42 through the moving component 1, the portion of the slider 41 and the guide rail 42 that does not pass through the moving component 1 is covered with the telescopic tube component 3, and the two ends of the telescopic tube component 3 are connected between the opposite surfaces of the moving component 1 and the fixed component 2. In this way, when the moving component 1 drives the slider 41 to move back and forth along the extension direction of the guide rail 42, the moving component 1 can always wrap around a portion of the slider 41 and the guide rail 42. At the same time, the moving component 1 causes the corresponding telescopic tube component 3 to undergo tensile deformation or compressive deformation, thereby achieving The other part of the slider 41 and the guide rail 42 are also always enclosed in the telescopic tube component 3. Thus, the slider 41 and the guide rail 42 are fully enclosed and sealed by the moving component 1 and the telescopic tube component 3, preventing the lubricating medium from evaporating or leaking from the inside to the outside, avoiding the waste of the lubricating medium, ensuring the durability of the lubrication effect, and preventing external dust and grinding debris from entering the guide rail 42 from the outside to the inside, reducing the friction or wear of the guide rail 42 and extending the service life of the guide rail 42. Moreover, it can also prevent the lubricating medium from adhering to the surfaces of other components in the device, avoiding the performance degradation of other components. In summary, this embodiment can effectively improve the reliability of the device equipped with a linear guide.

[0029] like Figure 2 As shown, optionally, the telescopic tube component 3 includes a rubber bellows 31 .

[0030] Specifically, in Figure 2 In the figure, the circumference of the rubber bellows 31 is arranged along the X-axis direction in the figure. The rubber bellows 31 on the left is marked as the first rubber bellows 311, and the rubber bellows 31 on the right is marked as the second rubber bellows 312. The two ends of the first rubber bellows 311 are respectively connected to the left end face of the moving part 1 and the left surface of the fixed part 2, and the two ends of the second rubber bellows 312 are respectively connected to the right end face of the moving part 1 and the right surface of the fixed part 2.

[0031] In this embodiment, the rubber bellows 31 has excellent elastic performance. When the moving component 1 drives the slider 41 to slide to the right along the guide rail 42, the rubber bellows 31 is deformed. Specifically, the first rubber bellows 311 produces tensile deformation, and the second rubber bellows 312 produces compressive deformation. Similarly, when the moving component 1 drives the slider 41 to slide to the left along the guide rail 42, the rubber bellows 31 is deformed. Specifically, the first rubber bellows 311 produces compressive deformation, and the second rubber bellows 312 produces tensile deformation. In this way, regardless of whether the slider 41 slides to the right or left, the first rubber bellows 311 and the second rubber bellows 312 can achieve a full sealing effect on the guide rail 42.

[0032] like Figure 2As shown, optionally, both ends of the rubber bellows 31 are turned outward to form an annular mounting portion, and the annular mounting portions at both ends are connected to the moving component 1 and the fixed component 2 respectively.

[0033] In this embodiment, the end of the rubber bellows 31 is turned outward to form an annular mounting portion, which can increase the contact area with the end face of the moving component 1 and the surface of the fixed component 2, so that the two ends of the rubber bellows 31 are more firmly connected to the end of the moving component 1 and the fixed component 2. In addition, since the contact area between the annular mounting portion and the end face of the moving component 1 and the surface of the fixed component 2 is large, the path for the medium to leak from the inside of the rubber bellows 31 to the outside through the gap is increased. In other words, it is more difficult for the medium to penetrate outward from the gap, thereby improving the sealing effect.

[0034] like Figure 2 As shown, optionally, in a natural state without external force, the lengths of the two rubber bellows 31 are equal.

[0035] In this embodiment, the two rubber bellows 31, namely the first rubber bellows 311 and the second rubber bellows 312, are of equal length. When the moving component 1 has no external driving force, the first rubber bellows 311 and the second rubber bellows 312 are in an initial state. That is, at this time, the first rubber bellows 311 and the second rubber bellows 312 maintain the same state. In other words, when the linear guide is not working, the first rubber bellows 311 and the second rubber bellows 312 are in the same compression amount, which means that the two are consistent in physical state, which helps to maintain the balance of the entire system. This balanced state helps to reduce additional stress and friction caused by imbalance, thereby extending the service life of the first rubber bellows 311 and the second rubber bellows 312.

[0036] like Figure 1 and Figure 2 As shown, optionally, the telescopic tube component 3 further includes a sealing ring, which is pressed tightly against the annular mounting portion, and the sealing ring and the annular mounting portion are connected to the moving component 1 or the fixed component 2 via screws.

[0037] Specifically, through holes for screws to pass through are opened in the circumferential direction of the sealing ring and the annular mounting portion, and then threaded holes for screw threaded connection are opened on the end face of the moving component 1 and the surface of the fixed component 2. During installation, the sealing ring is first placed on the rubber bellows 31, and then the annular mounting portion is pressed onto the end face of the moving component 1 or the surface of the fixed component 2, and the through holes on the annular mounting portion are aligned with the threaded holes on the end face of the moving component 1 or the surface of the fixed component 2. Then, the sealing ring is pressed onto the side of the annular mounting portion facing away from the end face of the moving component 1 or the surface of the fixed component 2, and the through holes on the sealing ring are aligned with the through holes on the annular mounting portion. Finally, the screw is passed through the through hole and threadedly connected to the threaded hole on the end face of the moving component 1 or the surface of the fixed component 2.

[0038] In this embodiment, the sealing ring is pressed against the annular mounting portion, and the sealing ring and the annular mounting portion are connected to the end of the moving component 1 or the fixed component 2 by screws, thereby further improving the sealing performance of the gap between the annular mounting portion and the end face of the moving component 1 or the surface of the fixed component 2, thereby preventing the media on the slider 41, the guide rail 42 and the base plate 421 from leaking from the gap or evaporating to the outside or external dust and grinding chips from entering the guide rail 42, thereby reducing the friction or wear of the guide rail 42.

[0039] It should be noted that the sealing ring may include a first sealing ring 321, a second sealing ring 322, a third sealing ring 323 and a fourth sealing ring 324. Figure 2 For example, the first sealing ring 321 is located between the fixed component 2 on the left and the left end of the first rubber bellows 311, the second sealing ring 322 is located between the right end of the first rubber bellows 311 and the left end of the moving component 1, the third sealing ring 323 is located between the right end of the moving component 1 and the left end of the second rubber bellows 312, and the fourth sealing ring 324 is located between the right end of the second rubber bellows 312 and the fixed component 2 on the right.

[0040] like Figure 2 As shown, the guide rail 42 includes a base plate 421 and a track portion 422. The two ends of the base plate 421 are respectively connected to two fixed components 2. The track portion 422 is connected to the base plate 421. The slider 41 is slidably connected to the track portion 422. The length of the track portion 422 is less than the length of the base plate 421.

[0041] In this embodiment, by adopting a base plate 421 with a certain thickness that is not easy to deform, and fixing the two ends of the base plate 421 on the fixed component 2, the moving component 1 can make reciprocating linear motion along the extension direction of the base plate 421, thereby ensuring the parallelism and straightness of the guide rail 42 under high load conditions. By setting the length of the track portion 422 to be smaller than the length of the base plate 421, and because the two ends of the base plate 421 are connected to the fixed component 2, the two ends of the track portion 422 are still a distance away from the corresponding fixed component 2, which limits the stroke of the slider 41 when sliding on the track portion 422, so that the slider 41 always maintains a certain distance from the fixed component 2, thereby avoiding excessive stretching and compression of the rubber bellows 31 and improving the service life of the rubber bellows 31.

[0042] like Figure 2 As shown, optionally, the base plate 421 is connected to the fixing component 2 by screws.

[0043] In this embodiment, a plurality of evenly distributed countersunk holes can be opened on the side surface of the fixing component 2 facing away from the base plate 421, and corresponding threaded holes can be opened at corresponding positions on the end surface of the base plate 421. During installation, the base plate 421 is first raised so that the threaded holes on the end surface of the base plate 421 are aligned with the countersunk holes on the fixing component 2, and then the screws are threaded into the threaded holes through the countersunk holes, thereby improving the assembly and disassembly efficiency between the base plate 421 and the fixing component 2.

[0044] like Figure 2 As shown, optionally, the rail portion 422 is connected to the bottom plate 421 by screws.

[0045] In this embodiment, a plurality of evenly distributed countersunk holes can be opened on the rail portion 422, and threaded holes can be opened at relative positions of the base plate 421. During installation, the lower surface of the rail portion 422 is first abutted against the upper surface of the base plate 421, so that the countersunk holes and the threaded holes are arranged in a one-to-one correspondence. Then, screws are inserted into the countersunk holes and screwed into the corresponding threaded holes, thereby achieving installation between the rail portion 422 and the base plate 421. During disassembly, the screws can be unscrewed from the threaded holes, thereby improving the assembly and disassembly efficiency between the rail portion 422 and the base plate 421.

[0046] like Figure 1 and Figure 2 As shown, optionally, the moving component 1 includes a moving block, the cross section of the moving block is a rectangular structure, the moving block is provided with a continuous through hole, the moving block is sleeved on the outside of the guide rail 42 and the slider 41 through the through hole, and the moving block is connected to the slider 41.

[0047] In this embodiment, the moving block is a strip structure with a rectangular cross-section, and the extension of the moving block is in the same direction as the X-axis in the figure. A continuous through hole can be provided in the moving block, and the extension direction of the continuous through hole is in the same direction as the X-axis in the figure. In this way, the guide rail 42 and the fixed component 2 can pass through the two ends of the continuous through hole. The length of the moving block is equal to the length of the slider 41. The moving block is driven by an external driving device to make the moving block and the slider 41 slide along the extension direction of the guide rail 42 (the X-axis direction in the figure), thereby realizing the compression and stretching of the rubber bellows 31 and achieving a full sealing effect on the slider 41 and the guide rail 42.

[0048] In other embodiments, the moving block may also be of other structural forms according to different actual application scenarios, such as a tubular structure with a circular cross-section, or a frame structure with other polygonal cross-sections. However, it should be noted that no matter what structural form the moving block is, it is necessary to ensure that the slider 41 and the guide rail 42 are enclosed inside it to achieve a fully sealed effect. In addition, the length of the moving block may not be equal to the length of the slider 41. For example, the length of the moving block may be greater than the length of the slider 41, that is, the two ends of the slider 41 will not pass through the two ends of the moving block. The length of the moving block may also be less than the length of the slider 41, that is, the two ends of the slider 41 pass through the two ends of the moving block and pass through the corresponding rubber bellows 31. Therefore, no matter whether the length of the slider 41 is greater than or less than the length of the moving block, the slider 41 is located inside the moving block or inside the moving block and the rubber bellows 31. In other words, the slider 41 will not be exposed to the outside, thereby achieving a fully sealed effect of the linear guide.

[0049] like Figure 2 As shown, optionally, the moving component 1 is connected to the slider 41 by screws.

[0050] In this embodiment, the screw connection method can be to evenly open a plurality of countersunk holes on the moving block, and open threaded holes at corresponding positions of the slider 41. The screws are threadedly connected to the threaded holes through the countersunk holes, and the heads of the screws are embedded in the countersunk holes, thereby realizing a detachable connection between the moving block and the slider 41. In this way, it is convenient to install and disassemble the moving block and the slider 41, and further facilitate the installation and disassembly between the moving component 1 and the slider 41, so as to facilitate the inspection and replacement of the linear guide related components in the moving block.

[0051] In summary, the movable block and the slider 41, the guide rail 42 and the base plate 421, and the base plate 421 and the fixed component 2 are all detachably connected by screws, thereby facilitating the assembly of the various components and also facilitating the replacement of one of the components.

[0052] Although the present invention is disclosed as above, the protection scope of the present invention is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and these changes and modifications will fall within the protection scope of the present invention.

Claims

1. A vacuum fully sealed linear guide, characterized in that: The invention comprises a moving part (1), a fixed part (2), a telescopic tube part (3) and a linear guide rail body (4), wherein the linear guide rail body (4) comprises a slider (41) and a guide rail (42), wherein the slider (41) is slidably connected to the guide rail (42), and the two fixed parts (2) are respectively connected to the two ends of the guide rail (42), and the moving part (1) is connected to the slider (41) and is sleeved outside the slider (41) and the guide rail (42), and the telescopic tube parts (3) are respectively provided between the two fixed parts (2) and the moving part (1). ), the telescopic tube component (3) is sleeved on the guide rail (42), and the two ends of the telescopic tube component (3) are connected to the moving component (1) and the corresponding fixed component (2); the guide rail (42) includes a base plate (421) and a track portion (422), the two ends of the base plate (421) are respectively connected to the two fixed components (2), the track portion (422) is connected to the base plate (421), the slider (41) is slidably connected to the track portion (422), and the length of the track portion (422) is less than the length of the base plate (421).

2. The vacuum fully sealed linear guide rail according to claim 1, characterized in that: The telescopic tube component (3) comprises a rubber bellows (31).

3. The vacuum fully sealed linear guide rail according to claim 2, characterized in that: Both ends of the rubber bellows (31) are turned outward to form an annular mounting portion, and the annular mounting portions at both ends are respectively connected to the moving component (1) and the fixed component (2).

4. The vacuum fully sealed linear guide rail according to claim 3, characterized in that: In a natural state without external force, the two rubber bellows (31) are equal in length.

5. The vacuum fully sealed linear guide rail according to claim 3, characterized in that: The telescopic tube component (3) further comprises a sealing ring, which is pressed tightly against the annular mounting portion, and the sealing ring and the annular mounting portion are connected to the moving component (1) or the fixed component (2) via screws.

6. The vacuum fully sealed linear guide rail according to claim 1, characterized in that: The bottom plate (421) is connected to the fixing component (2) via screws.

7. The vacuum fully sealed linear guide rail according to claim 1, wherein: The rail portion (422) is connected to the bottom plate (421) via screws.

8. The vacuum fully sealed linear guide rail according to any one of claims 1 to 7, characterized in that: The moving component (1) includes a moving block, the cross section of which is a rectangular structure. The moving block is provided with a connecting through hole. The moving block is sleeved on the guide rail (42) and the slider (41) through the through hole, and the moving block is connected to the slider (41).

9. The vacuum fully sealed linear guide rail according to any one of claims 1 to 7, characterized in that: The moving component (1) is connected to the slider (41) via screws.

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