A return flow structure for a linear module
By designing a new return flow structure in the linear module, and utilizing the arc groove and oil guide groove design of the mounting base and oil guide component, the difficulty of oil circuit design caused by the large longitudinal dimension of the slider is solved, thereby improving the lubrication effect and sealing performance, and adapting to the application requirements of compact space.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GUANGDONG CHUANGFENG PRECISION MASCH CO LTD
- Filing Date
- 2025-08-05
- Publication Date
- 2026-07-24
AI Technical Summary
The existing linear module has a large longitudinal dimension of the slider, which makes the oil circuit design of the slider and the return oil circuit unsuitable for applications with limited space, and the sealing and lubrication effects are poor.
A novel return flow device structure was designed, including a mounting base and an oil guide component. The mounting base is provided with an arc-shaped positioning groove and a limiting protrusion, while the oil guide component is provided with an arc-shaped groove and an oil guide channel. The arc-shaped groove and the arc-shaped positioning groove form a connecting channel, and the oil guide channel is connected to the oil passage inside the slider. This eliminates the traditional oil passage design, and only the oil guide channel is set on the oil guide component, which is suitable for sliders with reduced longitudinal dimensions.
It achieves effective lubrication on sliders with reduced longitudinal dimensions, ensures sealing and uniform lubrication supply, adapts to applications with limited space, and simplifies the structure.
Smart Images
Figure CN224550726U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a return flow structure for a linear module. Background Technology
[0002] In a linear module, the slider and guide rail are in contact through rolling elements, replacing sliding friction with rolling friction. This reduces the resistance to the linear motion of the slider and improves motion accuracy. In a linear module, the return valve is the core component that enables the rolling elements (such as steel balls) to circulate. The core function of the return valve is to guide the rolling elements smoothly from the ball grooves inside the slider to the grooves on the side of the slider (the grooves are formed by the semi-circular grooves on the side of the slider and the semi-circular grooves on the guide rail), and then back into the ball grooves inside the slider from the grooves on the side of the slider, forming a closed loop. There are two closed loops, located on both sides of the slider. Through this process, the rolling elements can move continuously with the slider, ensuring that the slider moves back and forth along the lead screw of the linear module without jamming or interruption.
[0003] In linear modules, the oil passages (also known as lubrication channels) on the slider are crucial structures for ensuring lubrication between the rolling elements and the guide rails and return valves, directly affecting the friction coefficient, wear rate, and service life of the linear module. In existing linear modules, the slider and lead screw are installed as follows: a mounting hole is provided on the slider, and a nut structure is screwed onto the lead screw. The nut structure is fixed in the mounting hole on the slider. When the lead screw rotates, the slider reciprocates along it. Because the nut structure screwed onto the lead screw must be fixed in the mounting hole of the slider, the difference between the hole diameter and the outer diameter of the lead screw must be at least equal to the wall thickness of the nut structure. This results in a relatively large hole diameter on the slider, leading to a larger longitudinal dimension of the slider. Examples of this type of oil passage on the slider and the oil passage on the return valve are found in Chinese Patent No. CN207740348U. Figures 1 to 3The support member 26 is installed above the slide 21. The oil inlet 211 is located on the side of the support platform at the top of the slide 21, and the oil outlet 212 is located at the end of the slide 21. The oil inlet 211 and the oil outlet 212 are connected by an oil injection path 213. A flow rate adjustment knob 215 is provided on the oil injection path 213 near the oil outlet 212 to adjust the cross-sectional area of the oil flow in the oil injection path 213. The main oil passage connected to the oil inlet 211 runs horizontally through the support platform at the top of the slide 21. The branch oil passage runs downhill from the middle of the support platform to the end of the slide 21. The oil distribution member 22 (return device) installed at the end of the slide 21 is provided with an oil distribution inlet 221 connected to the branch oil passage. A circular hole for the screw 31 to pass through is formed in the middle of the oil distribution member 22. Two holes are formed around the circular hole on the oil distribution member 22. Two semi-circular oil distribution paths 222 are connected to the oil distribution inlet 221. The two semi-circular oil distribution paths 222 are connected to the circular hole through the screw distribution port 223. After passing through the oil distribution inlet 221, the oil distribution path 222 and the screw distribution port 223 in sequence, the oil enters the inner edge of the screw lubrication ring 23 and lubricates the screw 31. At the bottom of the two semi-circular oil distribution paths 222, a track groove distribution port 224 connected to the oil distribution path 222 is formed. A ball distribution port 225 is formed on the lower side of the track groove distribution port 224. The lubricating oil in the track groove distribution port 224 can supply oil to the balls in the ball groove 214 through the ball distribution port 225. The lubricating component 24 is set at the bottom of the oil distribution component 22 and is connected to the track groove distribution port 224. The oil in the lubricating component 24 can lubricate the track groove of the linear track. In addition, since the upper middle part of the oil distribution component 22 is designed with an oil distribution inlet 221 and an oil distribution path 222, the top of the oil distribution component 22 must be fastened to the end of the slide block 21 by two locking parts 251 to ensure the sealing between the oil distribution component 22 and the slide block 21. The locking parts 251 can lock the locking cover 25, the oil distribution component 22 and the screw lubrication ring 23 on the slide block 21. In this way, the magnet used to adsorb the dustproof parts of the linear module can only be installed between the two locking parts 251 on the top of the oil distribution component 22, that is, the magnet can only be installed in the mounting cavity 226 above the round hole on the oil distribution component 22.
[0004] See Figures 1 to 3To make the existing slide block 21, which has a relatively large longitudinal dimension, suitable for applications with limited space, it is necessary to reduce the overall longitudinal dimension of the slide block 21. For example, the screw 31 of the linear module can be directly screwed into the internal threaded hole on the slide block 21, eliminating the nut structure. This allows the diameter of the internal threaded hole on the slide block 21 to be comparable to the outer diameter of the screw 31 (the diameter of the internal threaded hole is slightly larger than the outer diameter of the screw 31), effectively reducing the longitudinal dimension of the slide block 21. At the same time, the thickness of the support platform at the top of the slide block 21 and the longitudinal dimension of the oil distribution component 22 are also reduced accordingly. This means that the main oil passage and the oil distribution passage at the top of the slide block 21 cannot be set on the support platform. If they are still set on the support platform at the top of the slide block 21, the oil injection effect will be very poor. The oil passage needs to be redesigned, and the structure of the corresponding oil distribution component 22 at the end of the slide block 21 also needs to be redesigned. Utility Model Content
[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a return flow structure for a linear module.
[0006] According to one aspect of the present invention, a return flow structure for a linear module is provided, comprising: The mounting base has two arc-shaped grooves on its end face. One side of the mounting base has a first notch communicating with one of the arc-shaped grooves, and the other side has a second notch communicating with the other arc-shaped groove. One side of the mounting base has a first limiting protrusion located on the side of the first notch, and the other side has a second limiting protrusion located on the side of the second notch. The oil guide component has two arched grooves on one side, each contained within an arc-shaped groove. On the other side, it has two annular protrusions connecting to the ball grooves inside the slider. The cavities enclosed by these protrusions communicate with one end of each of the arched grooves. The outer wall of the annular protrusions near their ports is conical. On the other side, it also has two oil guide grooves communicating with the oil passages inside the slider. Each groove has an open end located on the side of the other end of each arched groove. The height of the opening at the end of the oil guide groove is approximately equal to the height of the axis of the annular protrusion. The connecting groove formed by the arc-shaped groove and the arc-shaped placement groove can connect the groove on the side of the slider of the linear module with the ball groove inside the slider.
[0007] The return flow structure of this utility model is installed at the end of the slider with a reduced longitudinal dimension. The annular protrusion on the oil guide is inserted into the port of the ball groove inside the slider. The outer wall of the annular protrusion near the port is conical so that the annular protrusion can be easily inserted into the port of the ball groove inside the slider. The slider is provided with corresponding oil passages. The arc-shaped groove on the oil guide and the arc-shaped mounting groove on the mounting base form a connecting groove that connects the groove on the side of the slider with the ball groove inside the slider. After lubricating oil is injected into the slider, the lubricating oil flows to the oil guide after passing through the oil passage on the slider. In the oil guide groove, the lubricating oil in the oil guide groove can supply oil to the rolling elements (such as steel balls) in the groove on the side of the slider through the opening at its end, thereby playing a role in lubricating the rolling elements. The return device structure of this utility model, because it is adapted to the slider with reduced longitudinal dimensions, eliminates the existing oil circuit design on the mounting base, and only designs an oil guide groove on the oil guide component that communicates with the oil circuit on the slider. The structure is simple and adapted to the slider with reduced longitudinal dimensions. In addition, the arc-shaped groove on the oil guide component and the arc-shaped positioning groove on the mounting base facilitate the processing and forming of the connecting groove formed by the two.
[0008] Furthermore, a recessed groove is provided on the end face of the mounting base, and two arc-shaped placement grooves are located in the recessed groove. The oil guide is accommodated in the recessed groove so that the end face of the oil guide is flush with the end face of the mounting base.
[0009] Therefore, the design of the arc-shaped groove on the oil guide and the arc-shaped placement groove in the sink facilitates the processing and forming of the connecting groove formed by the combination of the two. Moreover, the oil guide will not affect the fit between the end face of the mounting base and the end of the slider. The fact that the end face of the oil guide is flush with the end face of the mounting base can ensure the sealing between the end face of the mounting base and the end of the slider, preventing oil leakage.
[0010] Furthermore, the oil guide groove includes a connected transverse groove and a longitudinal groove, with the transverse groove located above the longitudinal groove.
[0011] Therefore, in order to accommodate the slider with reduced longitudinal dimensions, the oil passage on the slider that is directly connected to the oil guide groove will be lower than the height of the ball groove inside the slider. So the longitudinal groove can be connected to the oil passage on the slider, and the transverse groove can be kept at the same height as the groove on the side of the slider and the ball groove inside the slider, so that the lubricating oil in the oil guide groove can smoothly supply oil to the rolling elements in the groove on the side of the slider through the opening at its end.
[0012] Furthermore, the end face of the oil guide is provided with a connecting oil groove, one end of which is connected to the longitudinal groove of an oil guide groove, and the other end of which is connected to the longitudinal groove of another oil guide groove.
[0013] Therefore, the lubricating oil in the two guide grooves can flow between each other through the connecting oil grooves, ensuring uniform oil injection to the rolling elements on both sides of the slider.
[0014] Furthermore, the arc-shaped groove is semi-circular in shape.
[0015] Therefore, the semi-circular arc-shaped groove can connect the parallel grooves on the side of the slider with the ball grooves inside the slider to form a closed loop for the rolling element to move.
[0016] Furthermore, the mounting base is provided with an upward-facing U-shaped groove, and the top of each of the two side walls of the U-shaped groove is provided with a receiving cavity, in which a magnet is provided.
[0017] Therefore, in order to accommodate the slider with reduced longitudinal dimensions, the longitudinal dimensions of the mounting base are also reduced accordingly. As a result, the position of the lead screw on the mounting base for accommodating the linear module is designed as a U-shaped groove with an open top. The magnet of the linear module for adsorbing the dustproof steel strip can no longer be installed directly above the U-shaped groove. Since the return valve structure of this utility model eliminates the oil inlet and semi-circular flow channel oil circuit design on the existing mounting base, the top of the mounting base does not need to be tightened with locking screws to ensure sealing. Therefore, installing the magnet on the top of the two side walls of the U-shaped groove can solve the need for magnetic adsorption of steel strips and also accommodate the mounting base with reduced longitudinal dimensions.
[0018] Furthermore, it also includes a baffle, which is located on the outside of the mounting base and can cover the outer end face of the mounting base and the magnet in the accommodating cavity.
[0019] Therefore, the baffle can prevent the magnet from falling out of the cavity and also prevent foreign objects from entering.
[0020] Furthermore, it also includes a first fixing screw, a first mounting hole in the middle of the mounting base, a second mounting hole adapted to the first mounting hole on the baffle, and the end of the first fixing screw passes through the second mounting hole and the first mounting hole in sequence to fix the mounting base on the end face of the slider of the linear module.
[0021] Therefore, the mounting base and baffle can be fastened to the end face of the slider by the first fixing screw. Since the return structure of this utility model eliminates the oil inlet and semi-circular flow channel oil circuit design on the existing mounting base, the top of the mounting base does not need to be fastened with locking screws to ensure sealing. Therefore, the first mounting hole is set in the middle of the mounting base, and the top of the mounting base provides a position for the installation of the magnet.
[0022] Furthermore, it also includes a second fixing screw, a third mounting hole is provided near the bottom of the mounting base, and a fourth mounting hole adapted to the third mounting hole is provided on the oil guide. The end of the second fixing screw passes through the third mounting hole and the fourth mounting hole in sequence to fix the mounting base on the end face of the slider of the linear module.
[0023] Therefore, the mounting base and the oil guide can be fastened to the end face of the slider by the second fixing screw to ensure the sealing between the oil guide and the end face of the slider and prevent oil leakage.
[0024] Furthermore, there are two first fixing screws, and two first mounting holes and two second mounting holes. The two first mounting holes are located on both sides of the mounting base, and the two second mounting holes are located on both sides of the baffle. The ends of the two first fixing screws pass through one second mounting hole and one first mounting hole in sequence to fix the mounting base to the end face of the slider of the linear module.
[0025] Therefore, the mounting base and baffle can be securely fixed to the end face of the slider by two first fixing screws. Attached Figure Description
[0026] Figure 1 Appendix to the specification of Chinese patent with publication number CN207740348U Figure 2 ; Figure 2 Appendix to the specification of Chinese patent with publication number CN207740348U Figure 4 ; Figure 3 Appendix to the specification of Chinese patent with publication number CN207740348U Figure 5 ; Figure 4 This is a schematic diagram of a return flow structure for a linear module according to the present invention; Figure 5 for Figure 4 The diagram shows a split structure of the reflux rectifier; Figure 6 for Figure 5 A schematic diagram of the reflux condenser structure from another perspective; Figure 7 for Figure 4 A schematic diagram of the reflux condenser structure from another perspective; Figure 8 for Figure 4 The diagram shows the usage status of the reflux rectifier structure. Figure 9 This is a schematic diagram of another return flow structure for a linear module according to the present invention. Detailed Implementation
[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.
[0028] In the description of this utility model, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and for 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 this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. It should be noted that unless otherwise explicitly specified and limited, the terms "installed," "connected," "linked," and "set up" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components.
[0029] See Figures 4 to 8 A return valve structure for a linear module includes a mounting base 1, an oil guide 2, a baffle 3, a first fixing screw 4, and a second fixing screw 5.
[0030] See Figures 4 to 6 The mounting base 1 has two arc-shaped grooves 11 formed on its end face. The transverse cross-section of the arc-shaped grooves 11 is semi-circular, and the longitudinal cross-section of the longitudinal sidewalls of the arc-shaped grooves 11 is also semi-circular. A first notch 12 is formed on one side of the mounting base 1, communicating with one arc-shaped groove 11. A second notch 13 is formed on the other side of the mounting base 1, communicating with the other arc-shaped groove 11. A first limiting protrusion 14 is formed on one side of the mounting base 1, located on the side of the first notch 12. A second limiting protrusion 15 is formed on the other side of the mounting base 1. The positioning protrusion 15 is located on the side of the second notch 13. The longitudinal sections of the first limiting protrusion 14 and the second limiting protrusion 15 are both nearly semi-circular. When the slider of the linear module is installed in the U-shaped guide rail, the first limiting protrusion 14 and the second limiting protrusion 15 are accommodated in the semi-circular groove on the guide rail on which the slider is installed. The first limiting protrusion 14 and the second limiting protrusion 15 are used to prevent the rolling elements in the groove on the side of the slider from falling out. The return structure of this utility model, because it is adapted to the slider with reduced longitudinal dimensions, eliminates the existing oil circuit design on the mounting base, so there is no oil circuit design on the mounting base 1.
[0031] See Figures 4 to 7The mounting base 1 has an upward-facing U-shaped groove 17. The top of each of the two side walls of the U-shaped groove 17 has a receiving cavity 18, and a magnet 19 is installed in each receiving cavity 18. To accommodate the slider with a reduced longitudinal dimension, the longitudinal dimension of the mounting base 1 is also reduced accordingly. Therefore, the position of the lead screw of the linear module on the mounting base 1 is designed as a top-opening U-shaped groove 17. The lead screw of the linear module is inserted into the U-shaped groove 17. The magnet of the linear module (enclosed dustproof linear module) used to attract the dustproof steel strip can no longer be installed directly above the U-shaped groove 17. Because the return valve structure of this utility model eliminates the oil inlet (such as...) on the existing mounting base... Figure 3 Oil body distribution inlet 221) and semi-circular flow channel (such as Figure 3 The oil circuit design of the oil distribution path 222 in the middle does not require the top of the mounting seat 1 to be tightened with locking screws to ensure sealing. Therefore, the two magnets 19 are respectively installed on the top of the two side walls of the U-shaped groove 17, which can solve the need for magnetic steel strip and adapt to the mounting seat 1 with reduced longitudinal size.
[0032] See Figure 4 The top of the two side walls of the U-shaped groove 17 are formed with limiting parts 112 inward. When the lead screw of the linear module is inserted into the U-shaped groove 17, the two limiting parts 112 can prevent the lead screw of the linear module from easily coming out of the opening at the top of the U-shaped groove 17.
[0033] See Figure 5 The mounting base 1 has a recessed groove 16 formed on the end face facing the slider. Two arc-shaped mounting grooves 11 are located in the recessed groove 16, and the recessed groove 16 is used to install the oil guide component 2.
[0034] See Figures 4 to 7The oil guide 2 has two arched grooves 21 formed on one side. The oil guide 2 is housed in the recess 16. The end face of the oil guide 2 is flush with the end face of the mounting base 1. The two arched grooves 21 on the oil guide 2 are respectively housed in two arc-shaped placement grooves 11. The connecting groove formed by the arc-shaped grooves 21 on the oil guide 2 and the arc-shaped placement grooves 11 on the mounting base 1 can connect the groove on the side of the slider with the ball groove inside the slider, thereby forming two closed loops for the movement of the rolling elements. The rolling elements in the groove on one side of the slider can enter a connecting groove through the first notch 12. The rolling elements in the connecting groove can... The rolling element enters the groove on one side of the slider through the first notch 12, and the rolling element in the groove on the other side of the slider can enter another connecting groove through the second notch 13. The design of the arc-shaped groove 21 on the oil guide 2 and the arc-shaped placement groove 11 in the sink 16 facilitates the processing and forming of the connecting groove formed by the combination of the two. Moreover, the oil guide 2 will not affect the fit between the end face of the mounting seat 1 and the end of the slider. The end face of the oil guide 2 is flush with the end face of the mounting seat 1, which can ensure the sealing between the end face of the mounting seat 1 and the end of the slider and prevent oil leakage.
[0035] See Figure 6 The arc groove 21 is semi-circular in shape, that is, the transverse cross section of the arc groove 21 is semi-circular. The semi-circular arc groove 21 can connect the grooves on the side of the parallel slider with the ball grooves inside the slider to form a closed loop for the rolling body to move along the field.
[0036] See Figures 4 to 7 On the other side of the oil guide 2, two annular protrusions 22 are formed. The cavities enclosed by the two annular protrusions 22 are respectively connected to one end of the two arc-shaped grooves 21. The annular protrusions 22 are used to connect the ports of the ball grooves inside the slider. The two annular protrusions 22 can be inserted into the ports of the two ball grooves inside the slider respectively. The annular protrusions 22 can connect the ball grooves inside the slider of the linear module with the connecting grooves formed by the arc-shaped grooves 21 and the arc-shaped positioning grooves 11.
[0037] See Figure 4 The outer wall of the annular protrusion 22 near the port is tapered, which allows the annular protrusion 22 to be easily inserted into the port of the ball groove inside the slider of the linear module.
[0038] See Figures 4 to 7Two oil guide grooves 23 are formed on the other side of the oil guide component 2. The oil guide grooves 23 are used to communicate with the oil passage inside the slider. After lubricating oil is injected into the slider, the lubricating oil can flow into the oil guide grooves 23 on the oil guide component 2 after passing through the oil passage on the slider. One end of each of the two oil guide grooves 23 is open. The ends of the two open oil guide grooves 23 are respectively located on the side of the other end of the two arc-shaped grooves 21. The opening of the end of one oil guide groove 23 is located at the first notch 12, and the opening of the end of the other oil guide groove 23 is located at the second notch 13. After lubricating oil is injected into the slider, the lubricating oil flows into the two oil guide grooves 23 on the oil guide component 2 after passing through the oil passage on the slider. The lubricating oil in the oil guide grooves 23 can supply oil to the rolling elements (such as steel balls) in the grooves on the side of the slider through the opening at its end, thereby playing a role in lubricating the rolling elements.
[0039] See Figure 7 The oil guide groove 23 includes a transverse groove 231 and a longitudinal groove 232 that are connected. The transverse groove 231 is located above the longitudinal groove 232. The port of the transverse groove 231 near the mounting base 1 is open, and the bottom end of the longitudinal groove 232 is closed. The height of the opening at the end of the transverse groove 231 of the oil guide groove 23 is approximately equal to the height of the axis of the annular protrusion 22. In order to accommodate the slider with a reduced longitudinal dimension, the oil passage on the slider that is directly connected to the oil guide groove 23 will be lower than the height of the ball groove inside the slider. Therefore, the longitudinal groove 232 can be connected to the oil passage on the slider. The transverse groove 231 can maintain the same height as the groove on the side of the slider and the ball groove inside the slider, so that the lubricating oil in the oil guide groove 23 can smoothly supply oil to the rolling elements in the groove on the side of the slider through the opening at the end of the transverse groove 231.
[0040] In other embodiments, see Figure 9 The end face of the oil guide 2 can also be formed with a connecting oil groove 24. One end of the connecting oil groove 24 is connected to the longitudinal groove 232 of an oil guide 23, and the other end of the connecting oil groove 24 is connected to the longitudinal groove 232 of another oil guide 23. The lubricating oil in the two oil guide grooves 23 can flow to each other through the connecting oil groove 24, which can further ensure that the oil injection of the rolling elements on both sides of the slider is uniform.
[0041] See Figures 4 to 6 The baffle 3 is installed on the outside of the mounting base 1. The baffle 3 and the oil guide 2 are located on opposite sides of the mounting base 1. The shape of the baffle 3 is consistent with the shape of the end face of the mounting base 1. The baffle 3 can cover the outer end face of the mounting base 1 and the magnet 19 in the accommodating cavity 18. The baffle 3 can prevent the magnet 19 from falling out of the accommodating cavity 18 and prevent foreign objects from entering the mounting base 1 and the slider.
[0042] See Figure 5 and Figure 6The mounting base 1 has two first mounting holes 110 formed in the middle. These two first mounting holes 110 are located on both sides of the U-shaped groove 17 of the mounting base 1. The baffle 3 has two second mounting holes 31 formed on both sides of the baffle 3, each corresponding to one of the first mounting holes 110. Two first fixing screws 4 are also formed. The ends of the two first fixing screws 4 pass through one second mounting hole 31 and then one first mounting hole 110 in sequence to secure the mounting base. Mounting base 1 is fixed on the end face of the slider of the linear module, and baffle 3 is fixed on the end face of mounting base 1. Mounting base 1 and baffle 3 can be firmly fixed to the end face of the slider by two first fixing screws 4. Since the return flow structure of this utility model eliminates the oil inlet and semi-circular flow channel oil circuit design on the existing mounting base, the top of mounting base 1 of this utility model does not need to be tightened with locking screws to ensure sealing. Therefore, the first mounting hole 110 is set in the middle of mounting base 1. The top of mounting base 1, that is, the top of the two side walls of the U-shaped groove 17, provides a position for the installation of magnet 19.
[0043] See Figure 5 and Figure 6 The mounting base 1 has a third mounting hole 111 formed near the bottom. The oil guide 2 has a fourth mounting hole 25 that matches the third mounting hole 111. The end of the second fixing screw 5 passes through the third mounting hole 111 and the fourth mounting hole 25 in sequence, which can fix the mounting base 1 to the end face of the slider of the linear module. The mounting base 1 and the oil guide 2 can be fastened to the end face of the slider by the second fixing screw 5 to ensure the sealing between the oil guide 2 and the end face of the slider and prevent oil leakage.
[0044] See Figures 4 to 8The return valve structure of this utility model is installed at the end of the slider 10 after the longitudinal dimension has been reduced. Specifically, the return valve structure of this utility model is fixed to the end of the slider 10 by two first fixing screws 4 and second fixing screws 5. The two annular protrusions 22 on the oil guide 2 are respectively inserted into the ports of the two ball grooves inside the slider 10. The slider 10 is provided with corresponding oil passages (the oil passages inside the slider 10 are not protected by this utility model, so the design of the oil passages inside the slider 10 is not described in detail). The arc-shaped oil guide 2... The groove 21 and the arc-shaped mounting groove 11 on the mounting base 1 form two connecting grooves that can connect the grooves 30 on both sides of the slider 10 with the two ball grooves inside the slider 10 respectively. After lubricating oil is injected into the slider 10, the lubricating oil flows through the oil passage on the slider 10 to the longitudinal grooves 232 of the two oil guide grooves 23 on the oil guide member 2. The lubricating oil in the longitudinal grooves 232 can supply oil to the rolling elements (such as steel balls) in the grooves 30 on the side of the slider 10 through the transverse groove 231 and the opening at the end of the transverse groove 231, thereby providing oil to the rolling elements. For lubrication, when the slider 10 is installed in the U-shaped guide rail, the first limiting protrusion 14 and the second limiting protrusion 15 are accommodated in the semi-circular groove on the guide rail on which the slider 10 is installed. The first limiting protrusion 14 and the second limiting protrusion 15 can prevent the rolling elements in the groove 30 on the side of the slider 10 from falling out. The return valve structure of this utility model, because it is adapted to the slider 10 with a reduced longitudinal dimension, eliminates the oil circuit design on the existing mounting base, and only designs an oil guide groove 23 on the oil guide component 2 that communicates with the oil circuit on the slider 10. The structure is simple. To accommodate the slider 10 with a reduced longitudinal dimension, the longitudinal dimension of the mounting base 1 is also reduced accordingly. Therefore, the position on the mounting base 1 for accommodating the lead screw 20 is designed as a U-shaped groove 17 with an open top. The lead screw 20 is inserted into the U-shaped groove 17. The magnet for adsorbing the dustproof steel strip of the linear module (enclosed dustproof linear module) can no longer be installed directly above the U-shaped groove 17. Because the reflux device structure of this utility model eliminates the existing oil inlet and semi-circular flow channel oil circuit design on the mounting base ( Figure 3 As shown, the top of the mounting base 1 does not require locking screws to ensure sealing. Therefore, the two magnets 19 are installed on the top of the two side walls of the U-shaped groove 17 respectively, which can solve the need for magnetic steel strips and also adapt to the mounting base 1 with reduced longitudinal dimensions.
[0045] The above descriptions are merely some embodiments of this utility model, intended to illustrate the technical means of this utility model, and are not intended to limit the technical scope of this utility model. Any obvious improvements made to this utility model by those skilled in the art in conjunction with existing common knowledge fall within the protection scope of this utility model.
Claims
1. A return flow structure for a linear module, characterized in that, include: The mounting base has two arc-shaped grooves on its end face. One side of the mounting base has a first notch communicating with one of the arc-shaped grooves, and the other side has a second notch communicating with the other arc-shaped groove. One side of the mounting base has a first limiting protrusion located on the side of the first notch, and the other side has a second limiting protrusion located on the side of the second notch. The oil guide component has two arched grooves on one side, each contained within an arc-shaped groove. On the other side, it has two annular protrusions connecting to the ball grooves inside the slider. The cavities enclosed by these protrusions communicate with one end of each of the two arched grooves. The outer wall of each annular protrusion near its port is conical. On the other side, it also has two oil guide grooves communicating with the oil passages inside the slider. One end of each groove is open and located on the side of the other end of each of the two arched grooves. The height of the opening at the end of the oil guide groove is approximately equal to the height of the axis of the annular protrusion. The connecting groove formed by the arc-shaped groove and the arc-shaped placement groove can connect the groove on the side of the slider of the linear module with the ball groove inside the slider.
2. The reflux circulator structure according to claim 1, characterized in that, The mounting base has a recessed groove on its end face, and two arc-shaped placement grooves are located in the recessed groove. The oil guide is accommodated in the recessed groove so that the end face of the oil guide is flush with the end face of the mounting base.
3. The reflux circulator structure according to claim 1, characterized in that, The oil guide groove includes a transverse groove and a longitudinal groove that are connected, with the transverse groove located above the longitudinal groove.
4. The reflux condenser structure according to claim 3, characterized in that, The oil guide is provided with a connecting oil groove on its end face. One end of the connecting oil groove is connected to the longitudinal groove of an oil guide groove, and the other end of the connecting oil groove is connected to the longitudinal groove of another oil guide groove.
5. The reflux condenser structure according to claim 1, characterized in that, The arc-shaped groove is semi-circular in shape.
6. The reflux condenser structure according to any one of claims 1 to 5, characterized in that, The mounting base is provided with an upward-facing U-shaped groove, and the top of each of the two side walls of the U-shaped groove is provided with a receiving cavity, in which a magnet is provided.
7. The reflux condenser structure according to claim 6, characterized in that, It also includes a baffle, which is located on the outside of the mounting base and can cover the outer end face of the mounting base and the magnet in the accommodating cavity.
8. The reflux condenser structure according to claim 7, characterized in that, It also includes a first fixing screw, a first mounting hole in the middle of the mounting base, and a second mounting hole adapted to the first mounting hole on the baffle. The end of the first fixing screw passes through the second mounting hole and the first mounting hole in sequence to fix the mounting base on the end face of the slider of the linear module.
9. The reflux condenser structure according to claim 8, characterized in that, It also includes a second fixing screw, and the mounting base is provided with a third mounting hole near the bottom. The oil guide is provided with a fourth mounting hole that matches the third mounting hole. The end of the second fixing screw passes through the third mounting hole and the fourth mounting hole in sequence, and can fix the mounting base to the end face of the slider of the linear module.
10. The reflux condenser structure according to claim 8, characterized in that, There are two first fixing screws, and two first mounting holes and two second mounting holes. The two first mounting holes are located on both sides of the mounting base, and the two second mounting holes are located on both sides of the baffle. The ends of the two first fixing screws pass through one second mounting hole and one first mounting hole in sequence to fix the mounting base to the end face of the slider of the linear module.