Self-lubricating device and transmission assembly

Abstract

The embodiment of the utility model discloses a self-lubricating device and a transmission assembly, and the self-lubricating device comprises an oil box assembly and an oil scraper ring assembly, the oil scraper ring assembly is nested in the oil box assembly, can rotate relative to the oil box assembly around the axis of the inner hole, and can be limited and locked; the oil scraper ring assembly is provided with a second oil guide piece, and the second oil guide piece is provided with a contact part which extends towards the center of the oil scraper ring assembly and is used for making contact with the lead screw. And within the rotatable range of the oil scraper ring assembly relative to the oil box assembly, the first oil guide piece is always in contact with the second oil guide piece, so that lubricating oil in the oil storage cavity is transmitted to the surface of the lead screw nut through the first oil guide piece and the second oil guide piece. According to the self-lubricating device provided by the utility model, the contact part on the second oil guide piece can be flexibly attached to thread contours of lead screws in different shapes through the adjustable oil scraper ring assembly, the self-lubricating device has the functions of lubrication and dust prevention, and the adaptability and practicability of the device to the lead screws in multiple specifications are remarkably improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to screw rod accessory technical field more specifically, relate to a self -lubricating device and transmission assembly. BACKGROUND

[0002] Screw rod as common transmission element, is widely used in numerical control equipment, automation device etc. field. In order to ensure that screw rod has good motion accuracy and service life in the working process, usually need to lubricate the screw rod.

[0003] In CN219413434U discloses a screw rod device with lubricating function, it is through setting up oil box assembly on the nut, utilizes the contact of oil absorption spare and screw rod surface, forms the uniform lubricating oil film on the screw rod surface, to realize automatic lubrication. In the device, a part of oil absorption spare is arranged in the closed oil storage cavity to absorb lubricating oil, another part is stretched out of the oil storage cavity and is in close contact with the screw rod surface, along with the movement of the nut relative to the screw rod, drives the oil absorption spare synchronous rotation, thereby reaches the lubrication effect.

[0004] However, the oil absorption spare in the patent needs to be in close contact with the outer thread groove of the screw rod to achieve effective lubrication. Because even if the same specification screw rod, its outer thread specific shape (such as pitch, thread depth, profile angle, etc.) may exist big difference, and the installation position between the oil box assembly and the nut, screw rod is fixed once, the installation position of the oil absorption spare in the oil box assembly is also determined, leading to its unable to automatically adapt to different outer thread profile. This structure design limits the application range of the oil box assembly, can only match the screw rod of specific model or profile, poor universality, is not conducive to the standardization and batch promotion of product, and needs to be improved urgently. SUMMARY

[0005] The utility model aims at solving one of the technical problems in the related art to some extent. Therefore, the utility model embodiment proposes a self-lubricating device, which can be flexibly attached to the thread profile of different shaped screw rods through the adjustable oil scraping ring assembly, has both lubrication and dust prevention functions, and significantly improves the adaptability and practicality of the device to multiple specifications of screw rods.

[0006] The utility model embodiment further proposes a transmission assembly with the self-lubricating device.

[0007] The technical scheme adopted by the utility model is as follows: a self-lubricating device is provided, which comprises:

[0008] An oil box assembly is used for detachable fixing on the screw rod nut, and is provided with an inner hole for the screw rod to pass through and an oil storage cavity for storing lubricating oil; the oil storage cavity is provided with a first oil guide, which extends to the surface of the oil box assembly through a conducting part;

[0009] The oil scraping ring assembly is nested in the oil box assembly, can rotate around the axis of the inner hole relative to the oil box assembly, and can be positionally locked; the oil scraping ring assembly is provided with a second oil guide, which has a contact part extending towards the center of the oil scraping ring assembly and used for contacting the screw rod;

[0010] Within the rotatable range of the oil scraping ring assembly relative to the oil box assembly, the first oil guide is always in contact with the second oil guide, so that the lubricating oil in the oil storage cavity is transmitted to the surface of the screw nut via the first oil guide and the second oil guide.

[0011] With the above structure, the self-lubricating device can effectively overcome the problem of mismatch between the oil suction part and the screw thread in the prior art. Since the oil scraping ring assembly can freely rotate relative to the oil box assembly and is locked at any desired angle by the limiting device, the contact part of the second oil guide can be manually adjusted according to the actual thread profile of the screw rod after installation, thereby realizing close and uniform contact with the surface of the screw rod of different specifications and different thread parameters.

[0012] Further, the contact part can be made of flexible material to provide a certain deformation space during adjustment of the oil scraping ring assembly, thereby enhancing the fit with the surface of the screw rod. During operation of the screw rod, the oil scraping ring assembly rotates synchronously with the nut, and the second oil guide continuously brings the lubricating oil in the oil storage cavity to the surface of the screw rod, forming a stable oil film, effectively reducing friction and wear, and prolonging the service life of the screw rod and the nut.

[0013] In particular, the contact part of the second oil guide not only realizes transmission of lubricating oil during contact with the screw rod, but also plays a dustproof role of scraping off impurities attached to the surface of the screw rod and blocking external dust from entering the oil film area, further improving the stability and cleanliness of the operation of the screw rod and reducing the risk of damage to the thread structure by foreign matter. The first oil guide and the second oil guide have capillary effect oil guiding function. The lubricating oil in the oil storage cavity can be stably and continuously attracted to the second oil guide by capillary force, and further transmitted to the surface of the screw rod, avoiding uneven lubrication or interruption of oil supply caused by gravity or position change.

[0014] At the same time, since the oil box assembly is detachably installed on the screw nut, the installation, maintenance and cleaning process of the device is more convenient, and it is also convenient to replace the oil scraping ring assembly or the oil guide according to actual needs in the later stage, thereby improving the maintainability and use flexibility of the equipment.

[0015] In conclusion, the self-lubricating device provided by the utility model has the advantages that the self-lubricating device is provided with the rotatable and adjustable oil scraping ring assembly structure, cooperates with the capillary oil guiding mechanism and the contact part with the dustproof function, realizes the adaptation ability of the lubricating structure to different specifications of the screw rod, improves the lubricating efficiency, the service life and the operation stability, enhances the universality and the standardization degree of the device, and has good popularization and application value.

[0016] According to one embodiment of the utility model, the oil scraping ring assembly comprises a rotating ring and a second oil guiding piece, and the second oil guiding piece is installed in the annular groove or the fan-shaped annular groove provided on the rotating ring.

[0017] According to one embodiment of the utility model, the main body of the second oil guiding piece is annular, and correspondingly, the rotatable range of the oil scraping ring assembly relative to the oil box assembly is one or more circles, so that the second oil guiding piece can always be in contact with the first oil guiding piece in the whole rotating range, and the precise fitting with the external screw thread of the screw rod can be realized at different angle positions.

[0018] According to one embodiment of the utility model, the main body of the second oil guiding piece is fan-shaped annular, and correspondingly, the rotatable range of the oil scraping ring assembly relative to the oil box assembly is the radian corresponding to the fan-shaped annular, so that the fan-shaped annular oil guiding piece can keep continuous and stable contact with the surface of the screw rod in the set range during the rotation.

[0019] According to one embodiment of the utility model, the annular groove or the fan-shaped annular groove is provided with a communication hole through which the contact part extends out of the inner circle of the oil scraping ring and is used for contacting the external screw thread of the screw rod.

[0020] According to one embodiment of the utility model, the rotating ring is provided with a plurality of poking parts, and an external tool can be inserted into the poking part, so as to drive the rotating ring to rotate relative to the oil box assembly.

[0021] According to one embodiment of the utility model, the main body of the second oil guiding piece is provided with an opening, and the opening separates the annular structure into two relatively separated ends, so that the installation to the rotating ring is more convenient.

[0022] According to one embodiment of the utility model, the self-lubricating device further comprises a locking piece, and the locking piece can be switched between a locking position and an unlocking position.

[0023] In the locking position, the locking piece is used for limiting and fixing the oil box assembly and the oil scraping ring assembly.

[0024] In the unlocking position, the limiting state between the oil box assembly and the oil scraping ring assembly is released, so that the two can rotate relatively.

[0025] According to one embodiment of the utility model, the outer ring of the oil scraping ring assembly is provided with external teeth, the oil box assembly is provided with elastic locking parts, the locking parts have tooth grooves meshing with the external teeth, the locking parts provide rotary damping for the oil scraping ring assembly during meshing to limit the relative rotation speed of the oil scraping ring assembly, prevent unexpected rotary deviation of the oil scraping ring assembly due to inertia or vibration during equipment operation, and provide clear paragraph feeling and feedback feeling during manual rotary adjustment, improve controllability and precision of operation.

[0026] According to one embodiment of the utility model, at the locking position, the locking part is abutted by the locking piece to make the tooth groove mesh with the external teeth, that is, the locking piece indirectly locks the oil scraping ring assembly, thereby realizing stable locking of the oil scraping ring assembly and preventing loosening or deviation of the oil scraping ring assembly during operation.

[0027] According to one embodiment of the utility model, at the locking position, the inner end of the locking piece meshes with the external teeth to realize locking function, that is, the locking piece directly locks the oil scraping ring assembly, thereby preventing loosening or deviation of the oil scraping ring assembly during operation.

[0028] According to one embodiment of the utility model, the oil box assembly is provided with an oil leakage prevention groove corresponding to the position of the conducting part, and the oil leakage prevention groove is located at the lower part of the conducting part; the oil leakage prevention groove is used for receiving and temporarily storing lubricating oil possibly overflowing during capillary conduction. The conducting part continuously delivers lubricating oil in the oil storage cavity to the surface of the second oil conducting piece by capillary effect, and the oil leakage prevention groove effectively prevents excess lubricating oil from leaking to the outside of the device, thereby improving the cleanliness and reliability of the overall lubricating system.

[0029] According to one embodiment of the utility model, the oil box assembly comprises a shell, an end cover and the first oil conducting piece, the shell and the end cover are in sealing cooperation to combine to form an oil storage cavity for storing lubricating oil, and the first oil conducting piece is arranged in the oil storage cavity to guide lubricating oil from the oil storage cavity to the outside of the oil box assembly, thereby realizing continuous oil supply function.

[0030] According to one embodiment of the utility model, the oil box assembly is provided with an oil injection port and is provided with an oil plug for sealing the oil injection port.

[0031] A transmission assembly comprises a screw rod, a screw nut and the self-lubricating device. BRIEF DESCRIPTION OF DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or prior art description will be briefly introduced as follows. Obviously, the drawings in the following description only constitute some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0033] Figure 1 It is a perspective view of the self-lubricating device in the embodiments of the present application.

[0034] Figure 2 It is a structural schematic view of the self-lubricating device in the embodiments of the present application.

[0035] Figure 3 It is an exploded view of the self-lubricating device in the embodiments of the present application.

[0036] Figure 4 It is a perspective view of the shell and the oil guide in the embodiments of the present application.

[0037] Figure 5 It is a half-section perspective view of the self-lubricating device after removing the end cover in the embodiments of the present application.

[0038] Figure 6 It is a perspective view of the shell in the embodiments of the present application. Figure 5 It is a local enlarged view of position A in the above figure.

[0039] Figure 7 It is a perspective view of the shell in the embodiments of the present application.

[0040] Figure 8 It is a local enlarged view of position B in the above figure. Figure 7

[0041] It is a local enlarged view of position C in the above figure. Figure 9 Figure 7 It is a perspective view of the oil scraping ring assembly in the embodiments of the present application.

[0042] Figure 10 It is a half-section perspective view of the rotating ring in the embodiments of the present application.

[0043] Figure 11 It is a perspective view of the second oil guide in the embodiments of the present application.

[0044] Figure 12 Explanation of figure marks:

[0045] 1, shell; 2, end cover; 3, oil plug; 4, first oil guide; 5, rotating ring; 6, second oil guide; 7, locking piece;

[0046] 1, shell; 2, end cover; 3, oil plug; 4, first oil guide; 5, rotating ring; 6, second oil guide; 7, locking piece;

[0047] ​11. Oil reservoir; 12. Mounting groove; 13. Inner hole; 14. First fastening hole; 15. Locking part; 16. Side hole; 17. Leak-proof groove;

[0048] 15a. Tooth groove;

[0049] 21. Oil inlet; 22. Second fastening hole;

[0050] 41. Conducting part;

[0051] 51. External teeth; 52. Annular groove; 53. Connecting hole; 54. Actuating part;

[0052] 61. Contact part; 62. Opening. Detailed Implementation

[0053] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model. Example 1

[0054] like Figures 1-12 As shown, this embodiment discloses a self-lubricating device, comprising:

[0055] An oil box assembly is provided for detachable fixation to a lead screw nut, and has an inner hole 13 for the lead screw to pass through and an oil storage cavity for storing lubricating oil; a first oil guide 4 is provided in the oil storage cavity, which extends to the surface of the oil box assembly through a conductive part 41;

[0056] The oil scraper ring assembly is nested inside the oil box assembly and can rotate relative to the oil box assembly around the axis of the inner hole 13 and can be locked in place; the oil scraper ring assembly is provided with a second oil guide 6, the second oil guide 6 having a contact portion 61 extending toward the center of the oil scraper ring assembly and for contacting the lead screw;

[0057] Within the set range of rotation of the oil scraper ring assembly relative to the oil box assembly, the first oil guide 4 and the second oil guide 6 always maintain a stable and continuous contact state, thereby ensuring that the lubricating oil in the oil storage cavity can be smoothly transmitted through the conduction path formed between the two, and finally evenly delivered to the outer surface of the lead screw nut, so as to achieve continuous lubrication and effective protection of the lead screw surface.

[0058] Furthermore, in this embodiment, the oil box assembly is designed to be detachably installed and fixed to one end of the lead screw nut for easy maintenance and replacement. The oil box assembly has an internal oil reservoir for storing lubricating oil or grease, which is sealed to the outside to ensure the stability of the lubricating medium. When the lead screw nut rotates relative to the lead screw, the lubricating oil in the reservoir is stably guided to the working surface of the lead screw by the combined action of the first oil guide 4 and the second oil guide 6, forming a continuous oil film and achieving the dual functions of lubrication and dust prevention.

[0059] In this embodiment, the overall structure of the oil box assembly matches the outer contour of the lead screw nut, and the overall shape has two opposing planes and two arc surfaces, providing good fit. Both ends of the assembly are planar structures, and a circular inner hole 13 is opened in the middle. The inner hole 13 is a through hole, and its inner diameter is slightly larger than the outer diameter of the lead screw to ensure that the lead screw can pass through smoothly. The contact part 61 in the second oil guide 6 extends radially inward along the through hole and fits against the external thread surface of the lead screw to achieve precise delivery of lubricating oil.

[0060] Furthermore, in some other embodiments, the oil box assembly may have a C-shaped or U-shaped structure, or be formed by joining two semi-circular rings together, making it suitable for lead screw nuts of different sizes and structural types, thus enhancing its versatility.

[0061] Furthermore, in this embodiment, the first oil guide 4 and the second oil guide 6 achieve continuous flow of lubricating oil through capillary effect. Both are preferably made of flexible porous materials, such as foam, oil-absorbing cotton, or oleophilic polymer materials with microporous structures. These materials have excellent capillary oil absorption properties, enabling them to stably conduct lubricating oil to the screw surface through capillary action under unfavorable gravity or limited space conditions, thus avoiding lubrication interruption.

[0062] In other embodiments, the first oil guide 4 and the second oil guide 6 may also be made of elastic fiber material, felt material with surface oleophilic coating, or silicone or rubber material with special surface microstructure treatment, in order to improve oil guiding efficiency and durability and adapt to lubrication needs under different working conditions.

[0063] Furthermore, combined Figures 10-12 As shown, in this embodiment, the oil scraper ring assembly includes a rotating ring 5 and a second oil guide 6. The second oil guide 6 is installed in an annular groove 52 or a fan-shaped annular groove 52 provided on the rotating ring 5. The rotating ring 5 is made of rigid material, possessing good structural strength and stability, and serves as a supporting skeleton. The rotating ring 5 is integrally embedded in the annular mounting groove 12 of the oil box assembly and can be controllably rotated relative to the mounting groove 12 around its axis.

[0064] The rotating ring 5 is coaxially arranged in the inner hole 13 of the oil box assembly, ensuring the centering accuracy with the screw rod; the second oil guide 6 is fixed in the annular groove 52 on the outer periphery of the rotating ring 5, and the contact part 61 extending towards the screw rod can be in close contact with the outer thread of the screw rod, playing the dual functions of conducting and scraping impurities of the lubricating oil. The rotation of the rotating ring 5 causes the contact part 61 of the second oil guide 6 to be angularly adjusted along the outer circumferential direction of the screw rod, so that the distribution of the lubricating oil at different contact angles is realized, the screw rod structure with different thread profiles is adapted, and the uniformity of the lubricating effect and the adaptability of the device are improved.

[0065] Further, in combination with Figure 11 As shown in the embodiment, the rotating ring 5 is integrally formed by an injection molding process, and an annular groove 52 formed by a local recess is arranged on the outer periphery of the rotating ring 5 for mounting the second oil guide 6. The main body of the second oil guide 6 is an annular structure matching the shape of the annular groove 52, which is embedded in the annular groove 52 of the rotating ring 5. After installation, the outer edge of the second oil guide 6 is flush with the outer edge of the rotating ring 5, forming a structural integration and visual and functional unity.

[0066] The outer edge of the rotating ring 5 is also provided with straight-toothed external teeth 51 distributed in the radial direction, which are used to engage with the tooth groove 15a in the locking structure to realize the positioning and limiting functions. Since the second oil guide 6 is annular, it can be rotated at any angle of 360° in the oil box assembly with the rotating ring 5, and then the contact angle between the contact part 61 of the second oil guide 6 and the screw rod is adjusted by rotation to adapt to screw rods of various specifications and outer thread profiles.

[0067] In other embodiments, the main body of the second oil guide 6 is an arc-shaped fan ring structure, and the outer periphery of the rotating ring 5 is provided with a matching fan ring-shaped mounting groove 12, in which the second oil guide 6 is embedded. After installation, the outer edge of the second oil guide 6 is also flush with the outer edge of the rotating ring 5. Since the second oil guide 6 is fan ring-shaped, its coverage is smaller than that of a complete annular ring, and the rotatable range of the rotating ring 5 in the oil box assembly is also correspondingly reduced. The specific rotatable angle depends on the corresponding arc range of the fan ring-shaped second oil guide 6, but fine adjustment of the oil guiding contact angle can still be realized within the set range to adapt to actual installation or lubrication needs.

[0068] Further, in the embodiment, the bottom of the annular groove 52 is provided with a communication hole 53 for the contact part 61 of the second oil guide 6 to pass through. The contact part 61 extends in the inward radial direction through the communication hole 53 and protrudes from the inner edge of the rotating ring 5, and is used to be in close contact with the outer thread surface of the screw rod to realize the functions of conducting lubricating oil and scraping impurities.

[0069] In some other embodiments, if the rotating ring 5 is provided with a fan-shaped annular groove 52, a through hole 53 is also provided at the bottom of the groove for the contact part 61 of the fan-shaped oil guide to pass through the inner ring of the rotating ring 5 and keep good contact with the outer thread of the screw rod.

[0070] Further, the rotating ring 5 is provided with a plurality of actuating parts 54, and an external tool can be inserted into the actuating part 54 to drive the rotating ring 5 to rotate relative to the oil box assembly. The main body of the second oil guide 6 is provided with an opening 62, which separates the annular structure into two relatively separated ends, making it more convenient to install into the rotating ring 5.

[0071] In combination Figures 2-9 As shown, in the present embodiment, the oil box assembly includes a shell 1, an end cover 2, and a first oil guide 4. The shell 1 is provided with an oil storage groove 11, and the end cover 2 is used to seal the opening 62 on the oil storage groove 11, so that the shell 1 and the end cover 2 combine to form an oil storage cavity. The end cover 2 is provided with an oil inlet 21, through which lubricating oil is injected into the oil storage cavity. The oil inlet 21 is provided with an oil plug 3 for sealing the oil inlet 21.

[0072] Further, in the present embodiment, the shell 1 and the end cover 2 are both made of plastic material, which has good formability and lightweight characteristics. They are reliably connected by welding processes such as ultrasonic welding or hot plate welding to form a sealed structure to package the oil storage cavity. In order to realize stable fixation with the screw nut, the shell 1 is provided with a first fastening hole 14, and the end cover 2 is provided with a second fastening hole 22 at the corresponding position. After alignment, the two form a through hole for the fastener to pass through. The fastener can pass through the through hole and threadedly cooperate with the threaded hole on the screw nut, thereby realizing firm installation of the oil box assembly.

[0073] In addition, the central part of the shell 1 is provided with a stepped annular mounting groove 12 for rotatably embedding the oil scraping ring assembly. After the oil scraping ring assembly is assembled in the mounting groove 12, it can rotate around the central axis to adjust the lubrication angle. The central opening of the end cover 2 has a smaller diameter than the opening 62 of the mounting groove 12. During assembly, the oil scraping ring assembly is first embedded in the mounting groove 12 of the shell 1, and then the end cover 2 is welded and sealed with the shell 1. Through the axial limiting action of the end cover 2, the oil scraping ring assembly is effectively prevented from accidentally coming off the mounting groove 12 during operation or transportation, thereby ensuring the stability and reliability of the overall structure.

[0074] Specifically, in combination Figures 7 to 8 As shown, the self-lubricating device further includes a locking member 7, which can be switched between a locked position and an unlocked position, for controlling the relative rotation state between the oil scraping ring assembly and the oil box assembly.

[0075] When in the locked position, the locking member 7 acts on the internal structure of the oil box assembly, limiting and fixing the rotation of the oil scraping ring assembly relative to the oil box assembly;

[0076] When in the unlocked position, the limiting state is released, so that the oil scraping ring assembly can rotate freely around the central axis, realizing the adjustment of the lubrication angle.

[0077] Further, in the present embodiment, the mounting groove 12 of the oil box assembly is provided with an opening 62 notch on one side for accommodating the elastic locking part 15 with limiting function. The locking part 15 is provided with a tooth groove 15a on the side facing the oil scraping ring assembly, which matches the outer teeth 51 provided on the outer circle of the oil scraping ring assembly, to realize the tooth engagement. The locking part 15 is integrally injection molded with the outer shell 1, and one end thereof is a free end, which can elastically deform in the direction towards or away from the rotating ring 5 when subjected to external force.

[0078] When the oil scraping ring assembly is assembled in the mounting groove 12, the outer teeth 51 of the rotating ring 5 continue to engage with the tooth groove 15a of the locking part 15, and the locking part 15 provides appropriate rotational damping for the rotating ring 5 during this process, effectively limiting the relative rotation speed of the oil scraping ring assembly, preventing it from deviating unexpectedly due to inertia or vibration.

[0079] To realize the locking control, the side wall of the outer shell 1 is provided with a side hole 16, which communicates with the opening 62 notch and is used to install the locking member 7. The locking member 7 is preferably a screw structure, which is fixedly connected with the side hole 16 through threads. When the locking member 7 is screwed into the predetermined position, the inner end thereof presses against the free end of the locking part 15, causing the locking part 15 to deform towards the rotating ring 5, thereby strengthening the engagement between the tooth groove 15a and the outer teeth 51, and realizing the indirect locking of the oil scraping ring assembly in the locked position. Conversely, when the locking member 7 is unscrewed, the tooth engagement is released, i.e. the unlocking operation is completed.

[0080] In other embodiments, the inner end of the locking member 7 is provided with an engagement structure matching the outer teeth 51, and when the locking member 7 is screwed in, the inner end thereof can be directly inserted between the outer teeth 51 of the outer circle of the oil scraping ring assembly, thereby realizing the direct locking of the oil scraping ring assembly, ensuring that it remains fixed during operation and preventing unintended rotation. Correspondingly, when the locking member 7 is unscrewed, the engagement relationship is released, and the oil scraping ring assembly can restore the free rotation state, i.e. the unlocking operation is completed.

[0081] Specifically, in combination with Figure 7 and Figure 9As shown, in the present embodiment, the oil box assembly is provided with an oil leakage prevention groove 17 at the position corresponding to the conducting portion 41 of the first oil guide 4, which is located below the conducting portion 41 and used to collect and temporarily store the lubricating oil that may overflow during the conducting process. The side wall of the oil leakage prevention groove 17 is provided with an opening, and the main body of the first oil guide 4 is arranged in the oil storage cavity, part of which extends to form the conducting portion 41 that extends outward through the opening to realize the conducting of the lubricating oil. When the end cover 2 is assembled and connected with the shell 1, the end cover 2 applies a pressing action on the conducting portion 41 at the corresponding position, thereby closing the opening and preventing the lubricating oil in the oil storage cavity from leaking. The outer end of the conducting portion 41 stably contacts the outer ring of the main body of the first oil guide 4, thereby ensuring the continuous transmission of the lubricating oil to the subsequent oil guide path through the capillary effect.

[0082] Further, the middle segment of the conducting portion 41 is arranged in a suspended state above the oil leakage prevention groove 17. When the lubricating oil overflows during the conducting process, the oil leakage prevention groove 17 can temporarily store the lubricating oil, thereby avoiding pollution or waste caused by the leakage of the lubricating oil. Subsequently, the stored lubricating oil can be absorbed and transmitted to the surface of the lead screw again through the capillary effect of the oil guide, thereby realizing the recycling of the lubricating oil and further improving the lubricating efficiency and resource utilization rate of the device.

[0083] In the present embodiment, the applicable scenarios of the self-lubricating device are as follows: According to the national standard, the model of the lead screw is usually defined by the parameters of the pitch, the thread diameter, and the length, for example, “M8x1.25-1000” represents a lead screw with a pitch of 1.25 mm, a thread diameter of 8 mm, and a length of 1000 mm. The commonly used lead screw specifications include M8x1.25-1000, M8x1.5-1000, M8x2-1000, and M8x3-1000, etc.

[0084] However, the existing oil box assembly structure as described in CN219413434U is relatively fixed and can only adapt to one type of pitch specification. When it is incorrectly installed on other types of lead screws, the oil guide and the lead screw thread will be misaligned, which will prevent the oil guide from effectively contacting the bottom of the lead screw thread, thereby forming a lubrication dead angle and affecting the lubricating effect and the service life of the equipment.

[0085] The self-lubricating device provided in the present embodiment supports the user to manually rotate and adjust the oil scraping ring assembly after installation according to the actual thread structure, so that the contact portion 61 on the second oil guide 6 is embedded into the bottom of the thread at an appropriate angle, thereby realizing the full adhesion of the oil guide to the surface of the lead screw. This scheme significantly improves the adaptability of the device, enabling a single model of self-lubricating device to be compatible with lead screws of multiple different pitch specifications, thereby having good universality and application promotion value.

[0086] In another embodiment, a transmission assembly is disclosed, comprising a lead screw, a lead screw nut, and the self-lubricating device described in the embodiment.

[0087] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0088] In addition, the terms "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first" and "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise explicitly specified and limited.

[0089] In the present application, unless otherwise explicitly specified and limited, the "on" or "under" of the first feature to the second feature can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the "over", "above" and "on" of the first feature to the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The "under", "below" and "under" of the first feature to the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0090] Although the embodiments of the present application have been shown and described above, it should be understood that the above-mentioned embodiments are exemplary and cannot be understood as a limitation of the present application, and those skilled in the art can make changes, modifications, replacements and modifications to the above-mentioned embodiments within the scope of the present application.

Claims

1. A self-lubricating device, characterized in that, The application relates to a self-lubricating device for a screw rod and a screw rod nut. The self-lubricating device comprises: an oil box assembly for detachably fixing on the screw rod nut, provided with an inner hole for the screw rod to pass through and an oil storage cavity for storing lubricating oil; the oil storage cavity is provided with a first oil guide member which extends to the surface of the oil box assembly through a conducting part; a wiper ring assembly which is nestedly installed in the oil box assembly, can rotate around the axis of the inner hole relative to the oil box assembly and can be positionally locked; the wiper ring assembly is provided with a second oil guide member which has a contact part extending towards the center of the wiper ring assembly and used for contacting the screw rod; 2. A self-lubricating device according to claim 1, characterized in that: in the rotatable range of the wiper ring assembly relative to the oil box assembly, the first oil guide member always keeps in contact with the second oil guide member, so that the lubricating oil in the oil storage cavity is transmitted to the surface of the screw rod nut via the first oil guide member and the second oil guide member.

3. A self-lubricating device according to claim 2, wherein: The wiper ring assembly comprises a rotating ring and a second oil guide member which is installed in the annular groove or fan-shaped annular groove provided on the rotating ring. The main body of the second oil guide member is annular or fan-shaped; and / or the annular groove or fan-shaped annular groove is provided with a communication hole for the contact part to pass through; and / or the rotating ring is provided with a poking part; and / or 4. A self-lubricating device according to claim 1, characterized in that: the main body of the second oil guide member is provided with an opening. The self-lubricating device further comprises a locking member which can be switched between a locking position and an unlocking position; in the locking position, the locking member is used for positionally locking and fixing the oil box assembly and the wiper ring assembly; 5. A self-lubricating device according to claim 4, wherein: in the unlocking position, the positionally locking state between the oil box assembly and the wiper ring assembly is released, so that the two can rotate relative to each other.

6. A self-lubricating device according to claim 5, wherein: The outer ring of the wiper ring assembly is provided with external teeth, the oil box assembly is provided with a resilient locking part which has a tooth groove meshing with the external teeth, and the locking part provides rotational damping for the wiper ring assembly in the meshing process, so as to limit the relative rotation speed of the wiper ring assembly.

7. A self-lubricating device according to claim 4, wherein: In the locking position, the locking member abuts against the locking part, so that the tooth groove and the external teeth are engaged.

8. A self-lubricating device according to claim 1, characterized in that: In the locking position, the inner end of the locking member abuts against the outer surface of the wiper ring assembly, so as to realize the locking function.

9. A self-lubricating device according to claim 1, wherein: The oil box assembly is provided with an oil leakage prevention groove corresponding to the position of the conducting part, and the oil leakage prevention groove is located at the lower part of the conducting part. The oil box assembly comprises an outer shell, an end cover and the first oil guide member, and the outer shell and the end cover combine to form the oil storage cavity; and / or 10. A transmission assembly characterized by: the oil box assembly is provided with an oil injection port and is provided with an oil plug for sealing the oil injection port. The self-lubricating device comprises a screw rod, a screw rod nut and the self-lubricating device according to any one of claims 1-9.

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