Automatic lubricating structure of linear guide rail
By using the elastomer and self-lubricating block frame design in the self-lubricating structure, the problem of lubrication failure of linear guides under vibration is solved, ensuring continuous lubrication of the guides under vibration conditions and extending their service life.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 青岛祥银传动设备有限公司
- Filing Date
- 2025-08-15
- Publication Date
- 2026-05-19
AI Technical Summary
Existing linear guide lubrication structures are prone to elastomer displacement during vibration, failing to achieve self-lubrication and affecting service life.
The self-lubricating structure includes an elastomer, a self-lubricating block, and a self-lubricating block frame. The axial displacement of the self-lubricating block is restricted by the unidirectional movement of the elastomer, ensuring that it is in close contact with the guide rail surface and that the lubrication effect is not affected by vibration.
It achieves tight contact even when the guide rail vibrates, ensuring lubrication and extending the service life of the guide rail.
Smart Images
Figure CN224260747U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of guide rail lubrication technology, specifically an automatic lubrication structure for linear guide rails. Background Technology
[0002] Linear guides are commonly used in precision linear transmission applications, widely found in linear modules, CNC machine tools, and measuring machinery. In existing equipment using linear guides, adequate lubrication of the ball bearings is essential to ensure normal operation and maintain the guide's lifespan. There are two main lubrication methods for linear guides: direct ball bearing lubrication and guide rail lubrication, where the ball bearings move to areas on the guide rail surface where oil is present, thus providing lubrication.
[0003] Existing linear guide rail lubrication structures typically involve setting up a receiving area on the rear end face of the end cap, installing a lubrication unit within the receiving area, and placing an elastomer next to the lubrication unit. The elastomer can move freely along the thickness direction of the end cap, and the lubrication unit lubricates the contact surface of the guide rail to achieve lubrication. The disadvantage of this method is that if vibration causes a slight displacement of the elastomer, the guide rail will not make contact with the lubrication unit, thus failing to achieve the self-lubricating function. Therefore, in view of the above situation, there is an urgent need to develop an automatic lubrication structure for linear guide rails to overcome the shortcomings in current practical applications. Utility Model Content
[0004] The purpose of this invention is to provide an automatic lubrication structure for linear guides to solve the problems mentioned in the background art.
[0005] To achieve the above objectives, this utility model provides the following technical solution:
[0006] An automatic lubrication structure for linear guideways includes a self-lubricating structure, wherein the self-lubricating structure comprises:
[0007] The outer frame of the self-lubricating block has a protrusion on one side;
[0008] An elastomer is fixed to the side wall of the self-lubricating block outer frame and supported by the protrusion.
[0009] A self-lubricating block is disposed within the outer frame of the self-lubricating block, and its side wall is provided with an opening groove, and the lower surface of the self-lubricating block is provided with a lubrication part;
[0010] The protrusion restricts the elastomer to move only in one direction along the normal direction of the guide rail, and the elastomer pushes the self-lubricating block to make the lubricated part closely contact the rolling surface of the guide rail.
[0011] As a further embodiment of this utility model: the elastomer has a deformable function and is fixed to the side wall of the self-lubricating block outer frame.
[0012] As a further aspect of this utility model: the protrusion is smooth, which supports the elastic body and restricts the elastic body to move only in one direction.
[0013] As a further embodiment of this utility model: the opening groove of the self-lubricating block is fitted with the stop strip inside the outer frame of the self-lubricating block to restrict the movement of the self-lubricating block.
[0014] As a further embodiment of this utility model: the lower surface of the self-lubricating block is provided with a slope, and the slope is adapted to the shape of the rolling surface of the guide rail;
[0015] The rolling surface includes a first rolling surface, a second rolling surface, a third rolling surface, and a fourth rolling surface.
[0016] As a further embodiment of this utility model: the bottom of the self-lubricating block is provided with a protrusion, and the bottom of the outer frame of the self-lubricating block is provided with a snap-fit part;
[0017] The protrusion is fitted with the snap-fit part, and the snap-fit part is inserted into the groove of the self-lubricating block to restrict the rotation of the self-lubricating block;
[0018] This allows the self-lubricating block to smoothly contact the first, second, third, and fourth rolling surfaces of the guide rail.
[0019] Compared with the prior art, the beneficial effects of this utility model are:
[0020] This utility model relates to an automatic lubrication structure for linear guideways, comprising an elastomer, a self-lubricating block, and a self-lubricating block outer frame. The elastomer forms a split self-lubricating block within the self-lubricating block outer frame. The protrusion and the stop strip contact the connecting part and the side opening groove of the self-lubricating block, respectively. When the protruding part of the elastomer connects with the mating structure of the self-lubricating block, the turning part of the elastomer directly contacts the side wall of the self-lubricating block outer frame. At this time, the elastomer restricts the axial displacement of the self-lubricating block and ensures that the self-lubricating block directly contacts the surface of the guideway. When the guideway vibrates and undergoes slight displacement during movement, the protruding part of the elastomer penetrates into the mating structure, ensuring that the contact part of the self-lubricating block is always in close contact with the surface of the guideway. Attached Figure Description
[0021] Figure 1 This is an exploded view of the self-lubricating structure in this utility model.
[0022] Figure 2 This is an exploded view of the outer frame of the self-lubricating block in this utility model.
[0023] Figure 3 This is an exploded view of the self-lubricating block in this utility model.
[0024] Figure 4This is a cross-sectional view of the guide rail in this utility model.
[0025] Figure 5 This is a diagram showing the fit of the self-lubricating structure in this utility model.
[0026] Figure 6 This is an assembly diagram of the self-lubricating structure and the guide rail in this utility model.
[0027] Figure 7 The diagram shows other examples of this utility model.
[0028] Figure 8 This is a perspective view of the automatic lubrication structure in this utility model.
[0029] In the diagram: 4-guide rail, 10-slider, 11-end cap, 12-elastic body, 13-self-lubricating block, 14-self-lubricating block outer frame, 141-top, 142-protrusion, 143-stop strip, 144-accommodating part, 145-locking part, 146-contact part, 147-through hole, 148-limiting part, 131-upper wall, 132-first side wall, 133-second side wall, 134-lubricating part, 135-protrusion, 136-groove, 137-opening groove, 138-third side wall, 139-slope, 41-first rolling surface, 42-second rolling surface, 43-third rolling surface, 44-fourth rolling surface. Detailed Implementation
[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0031] The specific implementation of this utility model will be described in detail below with reference to specific embodiments.
[0032] Please see Figure 1 The automatic lubrication structure for linear guide rails provided in this embodiment of the present invention consists of an elastomer 12, a self-lubricating block 13, and a self-lubricating block outer frame 14. The self-lubricating structure is mounted on the end cap 11, and the end cap is mounted on the slider 10.
[0033] like Figure 2As shown, there is a receiving portion 144 inside the self-lubricating block outer frame 14. A stop strip 143 is placed at one end of the receiving portion 144, and a contact portion 146 is formed at the connection of the stop strip 143. The contact portion 146 is on the lower side of the self-lubricating block outer frame 14. At the same time, a limiting portion 148 is provided at the other end of the receiving portion 144. A through hole 147 is connected to the upper end of the limiting portion 148. There are protrusions 142 at both ends of the through hole 147. The protrusions 142 can be fully seen from any side of the end face of the self-lubricating block outer frame 14.
[0034] During installation, the elastomer 12 needs to be installed on the outside of the protrusion 142 and pressed against the inner side of the self-lubricating block frame 14.
[0035] In one embodiment of this utility model, such as Figure 3 As shown, a lubrication part 134 is provided on the self-lubricating block 13, and an opening groove 137 is provided around the lubrication part 134. When the self-lubricating block 13 is installed on the self-lubricating block outer frame 14 and fits against the receiving part 144, the stop strip 143 will be embedded in the opening groove 137, and the lubrication part 134 will be directly contacted by the elastic force of the elastomer 12. Figure 4 The guide rails shown are in contact with each other (wherein, the rolling surfaces include a first rolling surface 41, a second rolling surface 42, a third rolling surface 43, and a fourth rolling surface 44). At this time, the lubrication part 134 and the contact part 146 are of the same shape but not on the same plane. The self-lubricating block 13 has a first sidewall 132 on its surface, and at the same time, the surface has a second sidewall 133. The second sidewall 133 can connect the first sidewall 132 and the lubrication part 134.
[0036] like Figure 5 , 8 As shown, when the first sidewall 132 engages with the top 141 of the self-lubricating block outer frame 14, the top 141 can remove the redundant elastic force of the elastomer 12 and also restrict the movement of the self-lubricating block 13.
[0037] The lower surface of the self-lubricating block 13 has a protrusion 135 and a ramp 139. The ramp 139 has the same shape as the surface of the guide rail 4, and its connecting lubrication part 134 is integrated with the protrusion 135.
[0038] A snap-fit portion 145 is provided on the lower surface of the self-lubricating block outer frame 14. The snap-fit portion 145 is installed in conjunction with the protrusion 135. When the protrusion 135 passes through the snap-fit portion 145, the snap-fit portion 145 is inserted into the groove 136 and lifts the protrusion 135, thereby restricting the rotation of the self-lubricating block 13. During the movement, the interior of the self-lubricating block 13 will be filled with grease. At this time, the elastic body 12 will push the self-lubricating block 13. The restriction of the self-lubricating block outer frame 14 allows the lubrication part 134 in the self-lubricating block 13 to be in complete and tight contact with the first 41, second 42, third 43 and fourth rolling surfaces 44 of the guide rail, so that the self-lubricating block 13 can always be in stable contact with the rolling surfaces of the guide rail.
[0039] like Figure 6 The diagram shows a complete assembly of the self-lubricating structure, in which the self-lubricating block 13 (using a structure with two elastomers 12) is pushed evenly by the elastomer 12. Figure 7 As shown, a single elastomer 12 can also be used. In this embodiment, the elastomer 12 also pushes the self-lubricating block 13 to make contact, thereby achieving self-lubrication.
[0040] In summary, when the linear guide rail moves in a straight line, the protruding lubrication part 134 of the self-lubricating block 13 is in close contact with the surface of the rolling surface of the guide rail. When tilting or vibration occurs, the self-lubricating block 13 and the guide rail 4 will be in a state of close contact at one end and gap at the other end. At this time, the elastic body 12 will push the self-lubricating block 13 to eliminate the gap.
[0041] It should be noted that, in this utility model, unless otherwise explicitly specified and limited, the terms "sliding," "rotating," "fixed," and "equipped" should be interpreted broadly. For example, they can refer to welded connections, bolted connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0042] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.
Claims
1. An automatic lubrication structure for linear guideways, characterized in that, Includes a self-lubricating structure (1), said self-lubricating structure (1) comprising: The outer frame of the self-lubricating block (14) has a protrusion (142) on one side. An elastomer (12) is fixed to the side wall of the self-lubricating block outer frame (14) and supported by the protrusion (142); The self-lubricating block (13) is disposed inside the outer frame (14) of the self-lubricating block, and its side wall is provided with an opening groove (137), and the lower surface of the self-lubricating block (13) is provided with a lubrication part (134). The protrusion (142) restricts the elastic body (12) from moving unidirectionally along the normal direction of the guide rail, and the elastic body (12) pushes the self-lubricating block (13) to make the lubricating part (134) closely contact the rolling surface of the guide rail (4).
2. The automatic lubrication structure for linear guideways according to claim 1, characterized in that, The elastomer (12) has a deformable function and is fixed to the side wall of the self-lubricating block outer frame (14).
3. The automatic lubrication structure for linear guideways according to claim 1, characterized in that, The protrusion (142) is smooth and supports the elastic body (12) and restricts the movement of the elastic body (12) in the direction of the normal to the guide rail.
4. The automatic lubrication structure for linear guideways according to claim 1, characterized in that, The opening groove (137) of the self-lubricating block (13) engages with the stop strip (143) inside the outer frame (14) of the self-lubricating block to restrict the movement of the self-lubricating block (13).
5. The automatic lubrication structure for linear guideways according to claim 1, characterized in that, The self-lubricating block (13) has a ramp (139) on its lower surface, and the ramp (139) is adapted to the rolling surface shape of the guide rail (4). The rolling surface includes a first rolling surface (41), a second rolling surface (42), a third rolling surface (43), and a fourth rolling surface (44).
6. The automatic lubrication structure for linear guideways according to claim 5, characterized in that, The self-lubricating block (13) has a protrusion (135) at the bottom, and the self-lubricating block outer frame (14) has a snap-fit part (145) at the bottom. The protrusion (135) is fitted with the snap-fit part (145) and the snap-fit part (145) is inserted into the groove (136) of the self-lubricating block (13) to restrict the rotation of the self-lubricating block (13); This allows the self-lubricating block (13) to smoothly contact the first rolling surface (41), second rolling surface (42), third rolling surface (43) and fourth rolling surface (44) of the guide rail (4).