A return flow device structure for linear module

Abstract

The present invention discloses a return flow mechanism for a linear module, including an end cover, the end cover including a mounting seat and an oil guide member, two arc-shaped receiving grooves are provided on the end surface of the mounting seat, two arc-shaped grooves are provided on one side of the oil guide member, the two arc-shaped grooves are respectively accommodated in the two arc-shaped receiving grooves, two annular protrusions are provided on the other side of the oil guide member, the cavities enclosed by the two annular protrusions are respectively connected to one end of the two arc-shaped grooves, two oil guide grooves are provided on the other side of the oil guide member, one end of the two oil guide grooves are both open and respectively located on the side of the other end of the two arc-shaped grooves. The return flow mechanism of the present invention, because it is adapted to a slider with a reduced longitudinal size, eliminates the existing oil circuit design on the mounting seat and only designs an oil guide groove on the oil guide member that is connected to the oil circuit on the slider, resulting in a simple structure. In addition, the design of the arc-shaped groove on the oil guide member and the arc-shaped receiving groove on the mounting seat facilitates the processing and forming of the connecting groove formed by the two.

Description

Technical Field

[0001] The present invention relates to the field of linear modules, and in particular to a reflow device structure for linear modules. Background Art

[0002] In the linear module, the slider and the guide rail are in contact through rolling elements, and rolling friction replaces sliding friction, thereby reducing the resistance of the slider's linear motion and improving the motion accuracy. In the linear module, the returner is the core component to realize the cyclic motion of the rolling element (such as steel balls). The core function of the returner is to guide the rolling element to smoothly turn from the ball groove inside the slider to the groove on the side of the slider (the groove is formed by the semicircular groove on the side of the slider and the semicircular groove on the guide rail), and then re-enter the ball groove inside the slider from the groove on the side of the slider to form a closed loop. There are two closed loops, one on each side of the slider. Through this process, the rolling element can continue to move 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 the linear module, the oil circuit (also known as the lubrication channel) on the slider is a key structure to ensure the lubrication effect between the rolling element and the guide rail and the return flow device, which directly affects the friction coefficient, wear rate and service life of the linear module. In the existing linear module, the slider and the screw rod are installed in the following way: a mounting hole is provided on the slider, a nut structure is screwed on the screw rod, and the nut structure is fixed in the mounting hole on the slider. When the screw rod rotates, the slider moves back and forth along the screw rod. Since the nut structure screwed on the screw rod must be fixed in the mounting hole of the slider, the diameter of the mounting hole and the outer diameter of the screw rod have a difference of at least the wall thickness of the nut structure, which will result in a larger diameter of the mounting hole on the slider, thereby resulting in a larger longitudinal size of the slider. This type of oil circuit on the slider and the oil circuit on the return flow device are disclosed in the Chinese patent with announcement number CN207740348U, see Figures 1 to 3The bearing member 26 is installed above the slide 21, the oil inlet hole 211 is located on the side of the bearing platform at the top of the slide 21, and the oil outlet hole 212 is located on the end of the slide 21. The oil inlet hole 211 and the oil outlet hole 212 are connected by an oil injection path 213. A flow adjustment knob 215 for adjusting the oil flow cross-sectional area of ​​the oil injection path 213 is provided near the oil outlet hole 212. The main oil path connected to the oil inlet hole 211 passes horizontally through the bearing platform at the top of the slide 21, and the oil branch path passes downhill from the middle position of the bearing platform to the end of the slide 21. The oil distribution member 22 (reflux device) installed at the end of the slide 21 is provided with an oil distribution inlet 221 connected to the oil branch path. A circular hole for the screw 31 to pass through is formed in the middle of the oil distribution member 22, and two holes are formed on the oil distribution member 22 surrounding the circular hole. Two semicircular oil distribution paths 222 are connected to the oil body distribution inlet 221, and the two semicircular oil distribution paths 222 are connected to the circular hole through the screw distribution port 223. After the oil passes through the oil body distribution inlet 221, the oil distribution path 222 and the screw distribution port 223 in turn, it enters the inner edge of the screw lubrication ring 23 and lubricates the screw 31. The bottom of the two semicircular oil distribution paths 222 is respectively formed with a track groove distribution port 224 connected to the oil distribution path 222, and a ball distribution port 225 is formed on the side and lower part 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 part 24 is arranged at the bottom of the oil body distribution part 22 and is connected to the track groove distribution port 224. The oil in the lubricating part 24 can lubricate the track groove of the linear track. In addition, since the oil distribution component 22 is designed with an oil distribution inlet 221 and an oil distribution path 222 in the middle and upper part, the top of the oil distribution component 22 must be fastened to the end of the slide 21 through two locking components 251 to ensure the sealing between the oil distribution component 22 and the slide 21. The locking component 251 can lock the locking cover 25, the oil distribution component 22 and the screw lubrication ring 23 on the slide 21. In this way, the magnet for adsorbing the dustproof component of the linear module can only be installed in the position between the two locking components 251 at the top of the oil distribution component 22, that is, the magnet can only be installed in the installation cavity 226 above the circular hole on the oil distribution component 22.

[0004] See Figures 1 to 3In order to make the existing slide 21 with a larger longitudinal dimension suitable for application scenarios with smaller space, it is necessary to reduce the overall longitudinal dimension of the slide 21. For example, the screw 31 of the linear module is directly screwed into the internal threaded hole on the slide 21, and the nut structure is eliminated. This can make the aperture of the internal threaded hole on the slide 21 equivalent to the outer diameter of the screw 31 (the aperture of the internal threaded hole is slightly larger than the outer diameter of the screw 31), effectively reducing the longitudinal dimension of the slide 21. At the same time, the thickness of the bearing platform at the top of the slide 21 and the longitudinal dimension of the oil distribution component 22 are also reduced synchronously. This will make it impossible for the main oil circuit and the branch oil circuit at the top of the slide 21 to be set on the bearing platform. If they are still set on the bearing platform at the top of the slide 21, the oiling effect will be very poor. The oil circuit needs to be redesigned, and the structure of the oil distribution component 22 at the corresponding end of the slide 21 also needs to be redesigned. Summary of the Invention

[0005] The purpose of the present invention is to overcome the above-mentioned deficiencies of the prior art and provide a return flow device structure for a linear module.

[0006] According to one aspect of the present invention, a reflow device structure for a linear module is provided, comprising an end cap for connecting a groove on a side of a slider of the linear module with a ball groove inside the slider, the end cap comprising:

[0007] A mounting seat, wherein two arc-shaped mounting grooves are provided on an end surface of the mounting seat, a first notch is provided on one side of the mounting seat and is communicated with one arc-shaped mounting groove, and a second notch is provided on the other side of the mounting seat and is communicated with the other arc-shaped mounting groove, a first limiting protrusion is provided on one side of the mounting seat, and the first limiting protrusion is located on the side of the first notch, and a second limiting protrusion is provided on the other side of the mounting seat, and the second limiting protrusion is located on the side of the second notch; and

[0008] An oil guide member is provided with two arched arc grooves on one side of the oil guide member, and the two arc grooves are respectively accommodated in two arc-shaped receiving grooves. Two annular protrusions for connecting to the ball groove inside the slider are provided on the other side of the oil guide member. The cavities enclosed by the two annular protrusions are respectively communicated with one end of the two arc grooves. Two oil guide grooves for communicating with the oil path inside the slider are provided on the other side of the oil guide member. One end of the two oil guide grooves is open and is respectively located on the side of the other end of the two arc grooves.

[0009] The connecting groove formed by the arc groove and the arc-shaped positioning groove can connect the groove on the side of the slider of the linear module with the ball groove inside the slider.

[0010] The reflux device of the present invention is installed at the end of the slider after the longitudinal size is reduced, and the annular protrusion on the oil guide member is inserted into the port of the ball groove inside the slider, and a corresponding oil path is provided in the slider, and the connecting groove formed by the arc groove on the oil guide member and the arc-shaped mounting groove on the mounting seat can connect the groove on the side of the slider with the ball groove inside the slider. After the lubricating oil is injected into the slider, the lubricating oil flows into the oil guide groove on the oil guide member after passing through the oil path on the slider, and 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 reflux device structure of the present invention is adapted to the slider after the longitudinal size is reduced, and the existing oil path design on the mounting seat is eliminated. Only the oil guide groove connected to the oil path on the slider is designed on the oil guide member. The structure is simple and adapted to the slider after the longitudinal size is reduced. In addition, the design of the arc groove on the oil guide member and the arc-shaped mounting groove on the mounting seat facilitates the processing and forming of the connecting groove formed by the two.

[0011] Furthermore, a recessed groove is provided on the end surface of the mounting seat, two arc-shaped mounting grooves are located in the recessed groove, and the oil guide member is accommodated in the recessed groove so that the end surface of the oil guide member is flush with the end surface of the mounting seat.

[0012] Therefore, the design of the arc-shaped groove on the oil guide member and the arc-shaped mounting groove in the sink facilitates the processing and forming of the connecting groove formed by the combination of the two, and the oil guide member will not affect the fit between the end face of the mounting seat and the end of the slider. The end face of the oil guide member is flush with the end face of the mounting seat, which can ensure the sealing between the end face of the mounting seat and the end of the slider, and prevent oil leakage.

[0013] Furthermore, a U-shaped groove with an upward opening is provided on the mounting seat, and a receiving cavity is provided at the top of each of the two side walls of the U-shaped groove, and a magnet is provided in the receiving cavity.

[0014] Therefore, in order to adapt to the slider with reduced longitudinal size, the longitudinal size of the mounting seat is also reduced synchronously, so the position of the screw rod for accommodating the linear module on the mounting seat is designed as a U-shaped groove with an open top. The magnet of the linear module used to adsorb the dust-proof steel belt can no longer be installed directly above the U-shaped groove. Since the return flow structure of the present invention eliminates the oil inlet and the oil circuit design of the semicircular flow channel on the existing mounting seat, the top of the mounting seat does not need to be tightened with locking screws to ensure sealing. Therefore, the magnet is installed on the top of the two side walls of the U-shaped groove, which can not only solve the demand for magnetic steel belt, but also adapt to the mounting seat with reduced longitudinal size.

[0015] Furthermore, it also includes a baffle, which is arranged on the outside of the mounting seat and can cover the outer end surface of the mounting seat and the magnet in the accommodating cavity.

[0016] Therefore, the baffle can prevent the magnet from falling out of the accommodating cavity and prevent foreign matter from entering.

[0017] Furthermore, the oil guide groove includes a communicating transverse groove and a longitudinal groove, and the transverse groove is located above the longitudinal groove.

[0018] Therefore, in order to adapt to the slider with reduced longitudinal size, the oil circuit 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 circuit on the slider, and the transverse groove can be kept consistent in height with 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 pass through the opening at its end to supply oil to the rolling elements in the groove on the side of the slider.

[0019] Furthermore, a connecting oil groove is provided on the end surface of the oil guide member, one end of the connecting oil groove is connected to the longitudinal groove of one oil guide groove, and the other end of the connecting oil groove is connected to the longitudinal groove of another oil guide groove.

[0020] Therefore, the lubricating oil in the two oil guide grooves can flow mutually through the connecting oil groove, ensuring uniform oil filling to the rolling elements on both sides of the slider.

[0021] Furthermore, the arc-shaped groove is semicircular in shape.

[0022] Therefore, the semicircular arc groove can connect the grooves on the side of the slider arranged in parallel with the ball groove inside the slider to form a closed loop for the rolling body to move.

[0023] Furthermore, it also includes a first fixing screw, a first mounting hole is provided in the middle of the mounting seat, and a second mounting hole adapted to the first mounting hole is provided on the baffle. The end of the first fixing screw passes through the second mounting hole and the first mounting hole in sequence, and the mounting seat can be fixed on the end face of the slider of the linear module.

[0024] Therefore, the mounting seat and the baffle can be fastened to the end face of the slider by the first fixing screw. Since the reflux structure of the present invention eliminates the oil inlet and the oil circuit design of the semicircular flow channel on the existing mounting seat, the top of the mounting seat does not need to be fastened with a locking screw to ensure sealing, so the first mounting hole is set in the middle of the mounting seat, and the top of the mounting seat provides a position for the installation of the magnet.

[0025] Furthermore, it also includes a second fixing screw, a third mounting hole is provided near the bottom of the mounting seat, and a fourth mounting hole adapted to the third mounting hole is provided on the oil guide member. The end of the second fixing screw passes through the third mounting hole and the fourth mounting hole in sequence, and the mounting seat can be fixed on the end face of the slider of the linear module.

[0026] Therefore, the mounting seat and the oil guide member can be fastened to the end surface of the slider by the second fixing screw to ensure the sealing between the oil guide member and the end surface of the slider and prevent oil leakage.

[0027] Furthermore, the number of first fixing screws is two, and the number of first mounting holes and second mounting holes is two. The two first mounting holes are respectively located on both sides of the mounting base, and the two second mounting holes are respectively located on both sides of the baffle. The ends of the two first fixing screws pass through a second mounting hole and a first mounting hole in turn, and then the mounting base can be fixed on the end face of the slider of the linear module.

[0028] Therefore, the mounting seat and the baffle can be firmly fixed on the end surface of the slider by the two first fixing screws. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 The appendix to the specification of the Chinese patent with publication number CN207740348U Figure 2 ;

[0030] Figure 2 The appendix to the specification of the Chinese patent with publication number CN207740348U Figure 4 ;

[0031] Figure 3 The appendix to the specification of the Chinese patent with publication number CN207740348U Figure 5 ;

[0032] Figure 4 This is a structural schematic diagram of a reflux device structure for a linear module according to the present invention;

[0033] Figure 5 for Figure 4 The schematic diagram of the split structure of the reflux device shown;

[0034] Figure 6 for Figure 5 A schematic structural diagram of the recirculator structure from another perspective is shown;

[0035] Figure 7 for Figure 4 A schematic structural diagram of the recirculator structure from another perspective is shown;

[0036] Figure 8 for Figure 4 The diagram of the return flow device structure in use is shown;

[0037] Figure 9 This is a schematic structural diagram of another reflux device structure for a linear module according to the present invention. DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0039] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are 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, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second" and the like are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of the present invention, unless otherwise specified, "multiple" means two or more; it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected" and "set" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection, a mechanical connection, an electrical connection, a direct connection, an indirect connection through an intermediate medium, or a communication between the internal parts of two elements.

[0040] See Figures 4 to 8 A reflux device structure for a linear module includes an end cover, which is used to connect the groove on the side of the slider of the linear module with the ball groove inside the slider. The end cover includes a mounting seat 1, an oil guide part 2, a baffle 3, a first fixing screw 4 and a second fixing screw 5.

[0041] See Figures 4 to 6 , two arc-shaped mounting grooves 11 are formed on the end surface of the mounting seat 1, the transverse cross-section of the arc-shaped mounting groove 11 is semicircular, and the longitudinal cross-section of the longitudinal side wall of the arc-shaped mounting groove 11 is semicircular, and a first notch 12 is formed on one side of the mounting seat 1, and the first notch 12 is connected to one arc-shaped mounting groove 11, and a second notch 13 is formed on the other side of the mounting seat 1, and the second notch 13 is connected to another arc-shaped mounting groove 11, and a first limiting protrusion 14 is formed on one side of the mounting seat 1, and the first limiting protrusion 14 is located on the side of the first notch 12, and a second limiting protrusion 15 is formed on the other side of the mounting seat 1, and the second limiting protrusion 15 is formed on the other side of the mounting seat 1. The limiting 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 close to a semicircular shape. 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 semicircular groove on the guide rail for installing the slider. 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 flow structure of the present invention is adapted to the slider with reduced longitudinal size, and the oil circuit design on the existing mounting seat is cancelled, so there is no oil circuit design on the mounting seat 1.

[0042] See Figures 4 to 7, a U-shaped groove 17 with an upward opening is formed on the mounting seat 1, and a receiving cavity 18 is formed on the top of both side walls of the U-shaped groove 17. A magnet 19 is installed in each receiving cavity 18. In order to adapt to the slider after the longitudinal size is reduced, the longitudinal size of the mounting seat 1 is also reduced synchronously, so the position of the screw rod of the linear module on the mounting seat 1 is designed to be a U-shaped groove 17 with an open top. The screw rod of the linear module is inserted into the U-shaped groove 17. The magnet for adsorbing the dust-proof steel belt of the linear module (closed dust-proof linear module) can no longer be installed directly above the U-shaped groove 17. Since the reflux structure of the present invention eliminates the oil inlet on the existing mounting seat (such as Figure 3 The oil distribution inlet 221) and the semicircular flow channel (such as Figure 3 In the oil distribution path 222) of the oil circuit design, the top of the mounting base 1 does not need to be tightened with locking screws to ensure sealing, so the two magnets 19 are respectively installed on the top of the two side walls of the U-shaped groove 17, which can not only solve the demand for magnetic steel strips, but also adapt to the mounting base 1 after the longitudinal size is reduced.

[0043] See Figure 5 A recessed groove 16 is formed on the end surface of the mounting seat 1 facing the slider, and the 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 member 2.

[0044] See Figures 4 to 7 , one side of the oil guide member 2 is formed with two arched arc grooves 21, the oil guide member 2 is accommodated in the sink 16, the end face of the oil guide member 2 is flush with the end face of the mounting seat 1, and the two arc grooves 21 on the oil guide member 2 are respectively accommodated in the two arc-shaped receiving grooves 11, and the arc grooves 21 on the oil guide member 2 and the arc-shaped receiving grooves 11 on the mounting seat 1 form a connecting groove that 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 body. The rolling body in the groove on one side of the slider can enter a connecting groove through the first notch 12, and the rolling body in the connecting groove can The rolling body in the groove on one side of the slider can enter the groove through the first notch 12, and the rolling body in the groove on the other side of the slider can enter another connecting groove through the second notch 13, and the rolling body in the connecting groove can enter the groove on the other side of the slider through the second notch 13; the design of the arc groove 21 on the oil guide member 2 and the arc-shaped receiving groove 11 in the sink 16 facilitates the processing and forming of the connecting groove formed by the combination of the two, and the oil guide member 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 member 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 to prevent oil leakage.

[0045] See Figure 6The arc groove 21 is semicircular, that is, the transverse cross-section of the arc groove 21 is semicircular. The semicircular arc groove 21 can connect the grooves on the side of the slider arranged in parallel with the ball grooves inside the slider into a closed loop for the rolling body to move along the field.

[0046] See Figures 4 to 7 Two annular protrusions 22 are formed on the other side of the oil guide part 2. 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 respectively inserted into the ports of the two ball grooves inside the slider. The annular protrusions 22 can connect the ball groove inside the slider of the linear module with the connecting groove formed by the arc groove 21 and the arc-shaped receiving groove 11.

[0047] See Figures 4 to 7 Two oil guide grooves 23 are formed on the other side of the oil guide member 2. The oil guide grooves 23 are used to communicate with the oil circuit inside the slider. After the lubricating oil is injected into the slider, the lubricating oil can flow into the oil guide grooves 23 on the oil guide member 2 after passing through the oil circuit on the slider. One end of the two oil guide grooves 23 is open, and 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 the lubricating oil is injected into the slider, the lubricating oil flows into the two oil guide grooves 23 on the oil guide member 2 after passing through the oil circuit 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 groove on the side of the slider through the openings at their ends, thereby lubricating the rolling elements.

[0048] See Figure 7 The oil guide groove 23 includes a connected transverse groove 231 and a longitudinal groove 232. The transverse groove 231 is located above the longitudinal groove 232. The port of the transverse groove 231 close to the side of the mounting seat 1 is open, and the bottom end of the longitudinal groove 232 is closed. In order to adapt to the slider with a reduced longitudinal size, the oil path on the slider directly connected to the oil guide groove 23 will be lower than the height of the ball groove inside the slider, so the longitudinal groove 232 can be connected to the oil path on the slider, and 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 pass through the opening at the end of the transverse groove 231 to supply oil to the rolling elements in the groove on the side of the slider.

[0049] In other embodiments, see Figure 9A connecting oil groove 24 can also be formed on the end surface of the oil guide member 2. One end of the connecting oil groove 24 is connected to the longitudinal groove 232 of one oil guide groove 23, and the other end of the connecting oil groove 24 is connected to the longitudinal groove 232 of the other oil guide groove 23. The lubricating oil in the two oil guide grooves 23 can flow through the connecting oil groove 24, which can further ensure that the rolling elements on both sides of the slider are evenly filled with oil.

[0050] See Figures 4 to 6 The baffle 3 is installed on the outside of the mounting seat 1. The baffle 3 and the oil guide member 2 are located on opposite sides of the mounting seat 1 respectively. The shape of the baffle 3 is consistent with the shape of the end face of the mounting seat 1. The baffle 3 can cover the outer end face of the mounting seat 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 matter from entering the mounting seat 1 and the slider.

[0051] See Figure 5 and Figure 6 A first mounting hole 110 is formed in the middle of the mounting base 1. The number of the first mounting holes 110 is two. The two first mounting holes 110 are respectively located on both sides of the U-shaped groove 17 of the mounting base 1. Two second mounting holes 31 are formed on the baffle 3 and are respectively adapted to the two first mounting holes 110. The two second mounting holes 31 are respectively located on both sides of the baffle 3 and their positions correspond to the two first mounting holes 110. The number of the first fixing screws 4 is two. The ends of the two first fixing screws 4 pass through one second mounting hole 31 and one first mounting hole 110 in sequence. The mounting base 1 is fixed on the end face of the slider of the linear module, and the baffle 3 is fixed on the end face of the mounting base 1. The mounting base 1 and the baffle 3 can be firmly fixed on the end face of the slider by two first fixing screws 4. Since the reflux structure of the present invention eliminates the oil inlet and the oil circuit design of the semicircular flow channel on the existing mounting base, the top of the mounting base 1 of the present invention does not need to be tightened with a locking screw to ensure sealing, so the first mounting hole 110 is set in the middle of the mounting base 1, and the top of the 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 the magnet 19.

[0052] See Figure 5 and Figure 6 A third mounting hole 111 is formed near the bottom of the mounting seat 1, and a fourth mounting hole 25 is formed on the oil guide member 2 to match 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, and the mounting seat 1 can be fixed to the end face of the slider of the linear module. The mounting seat 1 and the oil guide member 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 member 2 and the end face of the slider to prevent oil leakage.

[0053] See Figures 4 to 8The reflux structure of the present invention is installed at the end of the slider 10 after the longitudinal size is reduced. Specifically, the reflux structure of the present invention 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 a corresponding oil circuit (the oil circuit inside the slider 10 is not protected by the present invention, so the oil circuit design inside the slider 10 is not described in detail). The arc groove 2 on the oil guide 2 The two connecting grooves formed by the arc-shaped mounting groove 11 on the mounting seat 1 can respectively connect the grooves 30 on both sides of the slider 10 with the two ball grooves inside the slider 10. After the lubricating oil is injected into the slider 10, the lubricating oil flows through the oil path on the slider 10 and flows into 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 grooves 231 and the openings at the ends of the transverse grooves 231, thereby playing a role in lubricating the rolling elements. 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 semicircular groove on the guide rail for installing the slider 10. 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 flow device structure of the present invention is adapted to the slider 10 with a reduced longitudinal size, and the oil circuit design on the existing mounting seat is cancelled. Only the oil guide groove 23 connected to the oil circuit on the slider 10 is designed on the oil guide member 2, which has a simple structure. Adapted to the slider 10 with reduced longitudinal size, in addition, in order to adapt to the slider 10 with reduced longitudinal size, the longitudinal size of the mounting base 1 is also reduced synchronously, so the position on the mounting base 1 for accommodating the screw rod 20 is designed as a U-shaped groove 17 with an open top, and the screw rod 20 is inserted into the U-shaped groove 17. The magnet for adsorbing the dust-proof steel belt of the linear module (closed dust-proof linear module) can no longer be installed directly above the U-shaped groove 17. Since the reflux structure of the present invention cancels the oil inlet and semicircular flow channel design on the existing mounting base ( Figure 3 As shown), the top of the mounting base 1 does not need to be tightened with locking screws to ensure sealing, so the two magnets 19 are respectively installed on the top of the two side walls of the U-shaped groove 17, which can not only solve the demand for magnetic steel strips, but also adapt to the mounting base 1 after the longitudinal size is reduced.

[0054] The above description is only some embodiments of the present invention, which is intended to illustrate the technical means of the present invention and is not intended to limit the technical scope of the present invention. Those skilled in the art can make obvious improvements to the present invention in combination with existing common knowledge, which all fall within the scope of protection of the present invention.

Claims

1. A return flow device structure for a linear module, comprising an end cap for connecting a groove on the side of a slider of the linear module with a ball groove inside the slider, characterized in that: The end cap comprises: The mounting seat is provided with two arc-shaped receiving grooves on the end surface of the mounting seat, a first notch communicating with one arc-shaped receiving groove is provided on one side of the mounting seat, and a second notch communicating with the other arc-shaped receiving groove is provided on the other side of the mounting seat. A first limiting protrusion is provided on one side of the mounting seat, and the first limiting protrusion is located on the side of the first notch. A second limiting protrusion is provided on the other side of the mounting seat, and the second limiting protrusion is located on the side of the second notch. The mounting seat is provided with a U-shaped groove with an upward opening, and the tops of the two side walls of the U-shaped groove are provided with accommodating cavities, and a magnet is provided in the accommodating cavity; An oil guide member is provided with two arched arc grooves on one side of the oil guide member, and the two arc grooves are respectively accommodated in the two arc-shaped receiving grooves. Two annular protrusions for connecting to the ball groove inside the slider are provided on the other side of the oil guide member. The cavities enclosed by the two annular protrusions are respectively communicated with one end of the two arc grooves. Two oil guide grooves for communicating with the oil path inside the slider are provided on the other side of the oil guide member. One end of the two oil guide grooves is open and is respectively located on the side of the other end of the two arc grooves. The connecting groove formed by the arc groove and the arc-shaped positioning groove can connect the groove on the side of the slider of the linear module with the ball groove inside the slider; a baffle, the baffle being arranged on the outside of the mounting seat and being capable of covering the outer end surface of the mounting seat and the magnet in the accommodating cavity; and A first fixing screw is provided in the middle of the mounting seat, and a second mounting hole is provided on the baffle plate to match the first mounting hole. The end of the first fixing screw passes through the second mounting hole and the first mounting hole in sequence to fix the mounting seat on the end face of the slider of the linear module.

2. The reflux device structure according to claim 1, characterized in that: A recessed groove is provided on the end surface of the mounting seat, and two arc-shaped mounting grooves are located in the recessed groove. The oil guide member is accommodated in the recessed groove so that the end surface of the oil guide member is flush with the end surface of the mounting seat.

3. The reflux device structure according to claim 1, characterized in that: The oil guide groove comprises a communicating transverse groove and a longitudinal groove, wherein the transverse groove is located above the longitudinal groove.

4. The reflux device structure according to claim 3, characterized in that: A connecting oil groove is provided on the end surface of the oil guide member, one end of the connecting oil groove is connected to the longitudinal groove of one 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 device structure according to claim 1, characterized in that: The arc-shaped groove is semicircular in shape.

6. The reflux device structure according to claim 1, characterized in that: It also includes a second fixing screw, a third mounting hole is provided near the bottom of the mounting seat, and a fourth mounting hole is provided on the oil guide member that is adapted to the third mounting hole. The end of the second fixing screw passes through the third mounting hole and the fourth mounting hole in sequence to fix the mounting seat on the end face of the slider of the linear module.

7. The reflux device structure according to claim 1, characterized in that: There are two first fixing screws, and there are 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 a second mounting hole and a first mounting hole in sequence, and then the mounting base can be fixed on the end face of the slider of the linear module.

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