Self-lubricating lock cylinder structure and intelligent door lock

Abstract

The utility model provides a kind of self-lubricating lock cylinder structure and intelligent door lock, self-lubricating lock cylinder structure includes: straight insertion core lock cylinder, lock cylinder shell, lubricating ring cover and tail rod structure;Wherein, the straight insertion core lock cylinder is used to insert and connect adaptive key assembly;The lubricating ring cover is sleeved on the tail rod structure, the inner surface of the lubricating ring cover is rotatably connected with the tail rod structure, the outer surface of the lubricating ring cover is rotatably connected with the lock cylinder shell, the lubricating ring cover is used to store lubricant, and release lubricant to tail rod structure and lock cylinder shell in rotating process;The tail rod structure is used to drive lock bolt to open.The utility model is by being provided with lubricating ring cover between lock cylinder shell and the tail rod structure, can realize the storage and release of lubricant, further slowly release the lubricant stored inside with the rotating process of lock cylinder structure, lubricate relatively rotating surface, reduce the friction and abrasion between lock cylinder shell and tail rod structure, realize long-acting self-lubrication.

Description

Technical Field

[0001] This utility model relates to the field of lock cylinders, and in particular to a self-lubricating lock cylinder structure and a smart door lock. Background Technology

[0002] The lock cylinder is the main component that controls the opening of a lock. Specifically, it refers to the core part that works with the key, rotates, and drives the bolt. It is the actual driving device for opening and closing all mechanical door locks. With rising living standards, smart door locks are gradually becoming more common in households due to their convenience.

[0003] Current smart locks use a tail rod structure at the end of the lock cylinder to link with the lock body on the back of the door, controlling locking and unlocking. This requires a tail rod structure that is connected to the lock cylinder's transmission. However, because the lock cylinder housing and tail rod structure cannot store lubricant, when the tail rod rotates during locking or unlocking, it experiences hard friction with the lock cylinder housing. This can scratch the inner surface of the lock cylinder housing, or even cause the tail rod structure to become stuck or jammed, preventing the smart lock from locking or unlocking properly and reducing its lifespan.

[0004] Therefore, existing technologies still need to be improved and developed. Utility Model Content

[0005] In view of the shortcomings of the prior art, the purpose of this utility model is to provide a self-lubricating lock cylinder structure and a smart door lock to solve the problems that the existing lock cylinder structure cannot achieve self-lubrication, has a high coefficient of friction, and the tail rod structure is prone to rotation jamming or jamming, resulting in a decrease in the service life of the door lock.

[0006] The technical solution of this utility model is as follows: In a first aspect, this utility model provides a self-lubricating lock cylinder structure, comprising: a straight-insertion lock cylinder, a lock cylinder housing, a lubrication ring sleeve, a tail rod structure, and a dial; wherein... The direct-insertion lock cylinder is disposed in the lock cylinder housing and is used to insert the adapter key assembly. The tail end of the direct-insertion lock cylinder is fixedly connected to the tail rod structure. When the adapter key assembly rotates, the direct-insertion lock cylinder drives the dial to rotate. The lubrication ring is sleeved on the tail rod structure. The inner surface of the lubrication ring is rotatably connected to the tail rod structure, and the outer surface of the lubrication ring is rotatably connected to the lock cylinder housing. The lubrication ring is used to store lubricant and release lubricant to the tail rod structure and the lock cylinder housing during rotation. When the tail rod structure rotates, it drives the dial wheel to rotate; The dial is sleeved on the straight-insertion lock cylinder and is locked in place with the straight-insertion lock cylinder; when the straight-insertion lock cylinder rotates, the dial is driven to rotate and is used to drive the lock tongue to open.

[0007] A further feature of this invention is that the lubrication ring sleeve is provided with a plurality of oil storage holes for storing lubricant.

[0008] In a further embodiment of this invention, the oil storage through hole is one or more of the following: round hole, gourd hole, U-shaped hole, teardrop hole, and conical hole.

[0009] A further feature of this invention includes a retaining ring, which abuts against the tail rod structure and the lubrication ring sleeve respectively, to prevent the lubrication ring sleeve from sliding forward axially.

[0010] In a further embodiment of this invention, a positioning part is provided at the front end of the lubrication ring sleeve. The thickness of the positioning part is greater than the thickness of the lubrication ring sleeve. The positioning part is used to abut against the lock cylinder housing to prevent the lubrication ring sleeve from sliding backward along the axial direction.

[0011] In a further embodiment of this invention, the tail rod structure includes a bushing and a lock cylinder tail rod, the tail of the bushing is provided with an accommodating space, and a fixing post is provided in the accommodating space; One end of the lock cylinder tail rod has a fixing through hole, which is inserted into the fixing post.

[0012] In a further embodiment of this invention, the lubrication ring is a copper lubrication ring or a polyoxymethylene lubrication ring.

[0013] In a further embodiment of this invention, the lock cylinder housing is a stainless steel lock cylinder housing.

[0014] Secondly, this utility model also provides an intelligent door lock, which includes a motor, the aforementioned self-lubricating lock cylinder structure, a bolt drive module, and a bolt; wherein, The motor is connected to the tail rod structure of the self-lubricating lock core structure. When the motor rotates, the dial wheel is driven to rotate through the tail rod structure. The dial of the self-lubricating lock cylinder structure is connected to the lock tongue drive module. When the self-lubricating lock cylinder structure is inserted into and the adapter key assembly is rotated, the dial rotates. The latch drive module is fixedly connected to the latch and is used to activate and drive the latch to retract when the dial rotates, so as to open the smart door lock.

[0015] This utility model provides a self-lubricating lock cylinder structure and an intelligent door lock. The self-lubricating lock cylinder structure includes: a direct-insertion lock cylinder, a lock cylinder housing, a lubrication ring sleeve, and a tail rod structure. The direct-insertion lock cylinder is disposed within the lock cylinder housing and is used to insert an adapter key assembly. The tail end of the direct-insertion lock cylinder is fixedly connected to the tail rod structure. When the adapter key assembly rotates, the direct-insertion lock cylinder drives a dial to rotate. The lubrication ring sleeve is fitted onto the tail rod structure, with its inner surface rotatably connected to the tail rod structure and its outer surface rotatably connected to the lock cylinder housing. The lubrication ring sleeve stores lubricant and releases lubricant to the tail rod structure and lock cylinder housing during rotation. When the tail rod structure rotates, it drives the dial to rotate. The dial is fitted onto the direct-insertion lock cylinder and is locked in place. When the direct-insertion lock cylinder rotates, the dial is driven to rotate and is used to open the bolt. This invention enables the storage and release of lubricant by setting a lubrication ring between the lock cylinder housing and the tail rod structure. As the lock cylinder structure rotates, the internally stored lubricant is slowly released to lubricate the relatively rotating surfaces, reducing friction and wear between the lock cylinder housing and the tail rod structure, and achieving long-term self-lubrication. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0017] Figure 1 This is a front view of the self-lubricating lock cylinder structure in a preferred embodiment of this utility model.

[0018] Figure 2 This is a top view of the self-lubricating lock cylinder structure in a preferred embodiment of this utility model.

[0019] Figure 3 This is a schematic diagram of the internal structure of the self-lubricating lock cylinder in a preferred embodiment of this utility model.

[0020] Figure 4 This is an exploded view of the self-lubricating lock cylinder structure in some preferred embodiments of this utility model.

[0021] The markings in the attached diagram are as follows: 1. Straight-insert lock cylinder; 11. Key slot; 12. Clutch pin; 2. Lock cylinder housing; 3. Lubrication ring sleeve; 31. Oil storage through hole; 32. Positioning part; 4. Tail rod structure; 41. Bushing; 411. Fixing post; 42. Lock cylinder tail rod; 421. Fixing through hole; 5. Dial wheel; 6. Adaptor key assembly; 7. Snap ring. Detailed Implementation

[0022] This utility model provides a self-lubricating lock cylinder structure and an intelligent door lock. To make the purpose, technical solution, and effects of this utility model clearer and more explicit, the following describes this utility model in further detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of this utility model and are not intended to limit this utility model.

[0023] In the implementation methods and claims, unless otherwise specified in the text, the terms "a," "an," "the," and "the" may also include plural forms. If the embodiments of this utility model involve descriptions of "first," "second," etc., such descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features.

[0024] It should be further understood that the term "comprising" as used in this specification means the presence of the stated features, integers, steps, operations, elements, and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof. It should be understood that when we say an element is "connected" or "coupled" to another element, it can be directly connected or coupled to the other element, or there may be intermediate elements. Furthermore, "connected" or "coupled" as used herein can include wireless connections or wireless coupling. The term "and / or" as used herein includes all or any unit and all combinations of one or more associated listed items.

[0025] It will be understood by those skilled in the art that, unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. It should also be understood that terms such as those defined in general dictionaries should be understood to have the same meaning as in the context of the prior art, and should not be interpreted in an idealized or overly formal sense unless specifically defined as herein.

[0026] Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0027] Research by the inventor of this utility model has revealed that current smart locks primarily use a single-paddle lock cylinder mechanism. The paddle rotates one revolution forward or backward, shifting the bolt and thus extending or retracting it. There are two ways to drive the lock using the paddle: one is manual locking or unlocking via a key; the other is automatic locking / unlocking via a motor-driven tail rod structure within the smart lock, which in turn drives the paddle. Both methods allow for paddle rotation control. However, fully automatic locks with a rear-mounted motor often use stainless steel direct-insertion cylinders. The mating surface between the tail rod's iron shaft sleeve and the stainless steel casing is smooth, and the iron fixed shaft of the tail rod and the stainless steel casing cannot retain lubricant, leading to dryness or loss. During use, these two parts experience hard and dry friction, causing the inner wall of the casing to be scratched by the iron shaft, creating uneven wear marks, increasing frictional resistance, and posing a risk of adhesive wear. Ultimately, this can cause the tail rod to become stuck or jammed. After a period of use, the lock cylinder tail rod structure will gradually become stuck and inflexible when rotating. In severe cases, it may even affect the normal locking and unlocking of the smart lock, reduce the service life of the lock body, and lead to a decline in the user experience when using the lock body.

[0028] To solve the above-mentioned technical problems, the first aspect is, such as Figure 1 and Figure 2 As shown, this utility model provides a self-lubricating lock cylinder structure, which includes: a direct-insertion lock cylinder 1, a lock cylinder housing 2, a lubrication ring sleeve 3, a tail rod structure 4, and a dial wheel 5; wherein, the direct-insertion lock cylinder 1 is disposed in the lock cylinder housing 2 and is used to insert a matching key assembly 6, the tail end of the direct-insertion lock cylinder 1 is fixedly connected to the tail rod structure 4, and when the matching key assembly 6 rotates, the direct-insertion lock cylinder 1 drives the dial wheel 5 to rotate; the lubrication ring sleeve 3 is sleeved on the tail rod structure 4, and the lubrication ring sleeve 3... The inner surface of the lubrication ring 3 is rotatably connected to the tail rod structure 4, and the outer surface of the lubrication ring 3 is rotatably connected to the lock cylinder housing 2. The lubrication ring 3 is used to store lubricant and release lubricant to the tail rod structure 4 and the lock cylinder housing 2 during rotation. When the tail rod structure 4 rotates, it drives the dial wheel 5 to rotate. The dial wheel 5 is sleeved on the straight-insertion lock cylinder 1 and is locked and fixed to the straight-insertion lock cylinder 1. When the straight-insertion lock cylinder 1 rotates, the dial wheel 5 is driven to rotate and is used to drive the lock tongue to open.

[0029] For ease of explanation, the self-lubricating lock cylinder structure and internal components are positioned at the end closest to the adapter key assembly 6, i.e. Figure 1 The left end serves as the front end, and the end furthest from the adapter key assembly 6 serves as the rear end. The adapter key assembly 6 is a key adapted to the self-lubricating lock cylinder structure. Specifically, the lock body shell is hollow, and its interior is used to house the direct-insertion lock cylinder 1. The direct-insertion lock cylinder 1 includes a clutch pin 12, which contains a return spring. When the matching adapter key assembly 6 is inserted into the direct-insertion lock cylinder 1, the direct-insertion lock cylinder 1 can rotate freely relative to the lock cylinder shell 2. At this time, the adapter key assembly 6 pushes the clutch pin 12 to the rear, compressing the return spring. Simultaneously, the clutch pin 12 engages with the dial wheel 5, and the clutch pin 12 of the direct-insertion lock cylinder 1 is keyed to the dial wheel 5. The dial wheel 5 can cooperate with the external bolt structure to trigger the bolt's position for unlocking or locking. When the adapter key assembly 6 is withdrawn, the return spring returns, causing the clutch pin 12 to return to its initial position. Accordingly, when the key does not match, that is, when the inserted key is not the compatible key assembly 6, the straight-insertion cylinder 1 is fixed and cannot be rotated.

[0030] Furthermore, the self-lubricating lock cylinder structure of the present invention can be automatically triggered, thus opening the lock without the need for an adapter key assembly 6. Specifically, on the rear end side, the dial wheel 5 can also be driven by rotating the tail rod structure 4. To reduce the friction between the tail rod structure 4 and the lock cylinder housing 2 during rotation, the lubrication ring sleeve 3 is fitted onto the outer surface of the tail rod structure 4. The lubrication ring sleeve 3 can be made of any material or structure suitable for storing lubricant. In use, the lubrication ring sleeve 3 is pre-configured and stores lubricant, located between the tail rod structure 4 and the lock cylinder housing 2, and slowly releases lubricant outward with rotation, wetting the two contact surfaces of the lock cylinder housing 2 and the lubrication ring sleeve 3, and the lubrication ring sleeve 3 and the tail rod structure 4, forming a lubricating oil film between the gaps, so that the lock cylinder housing 2 and the tail rod structure 4 can remain lubricated for a relatively long period of time.

[0031] In some preferred embodiments of this utility model, such as Figure 1 and Figure 2As shown, the lubrication ring 3 is provided with a plurality of oil storage through holes 31 for storing lubricant. The number of oil storage through holes 31 is preferably eight, but other numbers can also be used to increase the lubricant storage capacity. The shape of the oil storage through holes 31 can be one or more of the following: round hole, gourd hole, U-shaped hole, teardrop hole, and conical hole. At least one of the above shapes can be selected, but other shapes can also be used. When only one shape of through hole is selected, a round hole is preferred. Blind holes or storage grooves of any depth, shape, and form can also be provided on the inner and outer surfaces of the ring to serve as lubricant storage spaces. The oil storage through holes 31 can be formed by rotary drilling or stamping; this invention does not impose any limitations. Specifically, before use, lubricant is applied to the surface of the copper sleeve with a brush. Due to the surface tension of the liquid, the lubricant will rise and adhere to the inside of the small holes in the copper sleeve, increasing the total lubricant storage capacity by more than ten times. When the self-lubricating lock cylinder is working, the lubrication ring 3 can rotate freely relative to the lock cylinder housing 2, thereby forming a slight negative pressure inside the oil storage hole 31. This negative pressure pushes a certain amount of lubricant onto the lock cylinder housing 2 and / or the tail rod structure 4, achieving lubrication. The lubrication ring 3 is either a copper lubrication ring or a polyoxymethylene (POM) lubrication ring. Preferably, the lubrication ring 3 is a copper lubrication ring, which is made of pure copper. Pure copper, as a metal, has good ductility and is relatively soft, allowing for soft friction between it and the lock cylinder housing 2 and the tail rod structure 4, reducing the coefficient of friction.

[0032] The lubricant is a lubricating medium used to reduce the frictional resistance of the friction pair and slow down its wear. It also has functions such as cooling, cleaning, and preventing contamination. It can be a water-based lubricant or an oil-based lubricant, at least one of mineral lubricants, plant-based lubricants, or animal-based lubricants, or a synthetic lubricant such as silicone oil, fatty acid amide, oleic acid, polyester, synthetic ester, carboxylic acid, etc., or it can be a grease. In some preferred embodiments, the lubricant can be a semi-solid or solid lubricant when applied. By absorbing the heat generated by the friction between the lubrication ring sleeve 3 or the tail rod structure 4 and the lubrication ring sleeve 3 when the self-lubricating lock core structure rotates, the lubricant gradually melts and is slowly released from the pores of the oil storage hole 31, forming a stable oil film on the relatively rotating surface, thus achieving long-term self-lubrication.

[0033] Further, please refer to Figure 3 and Figure 4The direct-insertion lock cylinder 1 includes a keyway 11, a clutch pin 12, and a lock body structure (not shown in the figure) that can be matched with the adapter key assembly 6. The keyway 11 is inserted and fixed to the clutch pin 12, and the clutch pin 12 is keyed to the tail rod structure 4. The lock body structure can be located at any position within the lock cylinder housing 2. This lock body structure can only be matched when the inserted key is a structure that matches the key assembly, allowing the keyway 11 and the clutch pin 12 to rotate freely. The lock body structure is prior art, and those skilled in the art can readily understand its implementation. For example, the lock body structure can use several locking pins to prevent the keyway 11 from rotating in the locked state. When the adapter key assembly 6 is inserted, the locking pins return to the correct position, and the keyway 11 and the clutch pin 12 rotate freely.

[0034] In another preferred embodiment of this utility model, the self-lubricating lock core structure further includes a retaining spring 7, which should be referred to in conjunction with the above. Figures 1 to 4 The retaining spring 7 abuts against both the tail rod structure 4 and the lubrication ring sleeve 3 to prevent the lubrication ring sleeve 3 from sliding forward axially. Specifically, the retaining spring 7 is a U-shaped metal spring, which can also be a ring-shaped metal spring. A fixing groove is provided on the tail rod structure 4, and the retaining spring 7 is fixedly engaged in the fixing groove. Thus, when the lubrication ring sleeve 3 has a tendency to slide forward, it abuts against the tail end of the retaining spring 7, providing a counterforce to prevent the lubrication ring sleeve 3 from sliding forward axially.

[0035] In a further embodiment of a preferred embodiment of this utility model, a positioning part 32 is provided at the front end of the lubrication ring sleeve 3. The thickness of the positioning part 32 is greater than the thickness of the lubrication ring sleeve 3. The positioning part 32 is used to abut against the lock cylinder housing 2 to prevent the lubrication ring sleeve 3 from sliding backward along the axial direction. Specifically, at this time, the front end of the positioning part 32 of the lubrication ring sleeve 3 abuts against the snap ring 7, and the rear end of the positioning part 32 abuts against the lock cylinder housing 2. Thus, when the lubrication ring sleeve 3 has a tendency to slide away from the front end of the self-lubricating lock cylinder structure, the lock cylinder housing 2 provides a force in the opposite direction to the lubrication ring sleeve 3, ensuring that the lubrication ring sleeve 3 can rotate freely without sliding along the axial direction.

[0036] Furthermore, the tail rod structure 4 includes a bushing 41 and a lock cylinder tail rod 42. The bushing 41 has a receiving space at its tail end, and a fixing post 411 is provided within the receiving space. One end of the lock cylinder tail rod 42 has a fixing through hole 421, which is inserted into the fixing post 411. The lock cylinder housing 2 is a stainless steel lock cylinder housing 2. The bushing 41 is preferably an iron bushing 41, which is used for key connection with the straight-insertion lock cylinder 1.

[0037] Secondly, this utility model also provides an intelligent door lock, which includes a motor, the aforementioned self-lubricating lock cylinder structure, a bolt drive module, and a bolt. The motor is connected to the tail rod structure of the self-lubricating lock cylinder structure, and when the motor rotates, it drives a dial to rotate via the tail rod structure. The dial of the self-lubricating lock cylinder structure is connected to the bolt drive module, and when the self-lubricating lock cylinder structure is inserted into and rotates the adapter key assembly, the dial rotates. The bolt drive module is fixedly connected to the bolt and is used to activate and drive the bolt to retract when the dial rotates, thereby opening the intelligent door lock. Specific details are as described in the specific embodiments of the self-lubricating lock cylinder structure, and will not be repeated here.

[0038] This utility model provides a self-lubricating lock cylinder structure and an intelligent door lock. The self-lubricating lock cylinder structure includes: a direct-insertion lock cylinder, a lock cylinder housing, a lubrication ring sleeve, and a tail rod structure. The direct-insertion lock cylinder is disposed in the lock cylinder housing and is used to insert an adapter key assembly. The tail end of the direct-insertion lock cylinder is fixedly connected to the tail rod structure. When the adapter key assembly rotates, the direct-insertion lock cylinder drives the dial wheel to rotate. The lubrication ring sleeve is sleeved on the tail rod structure. The inner surface of the lubrication ring sleeve is rotatably connected to the tail rod structure, and the outer surface of the lubrication ring sleeve is rotatably connected to the lock cylinder housing. The lubrication ring sleeve is used to store lubricant and release lubricant to the tail rod structure and the lock cylinder housing during rotation. When the tail rod structure rotates, it drives the dial wheel to rotate. The dial wheel is sleeved on the direct-insertion lock cylinder and is locked in place with the direct-insertion lock cylinder. When the direct-insertion lock cylinder rotates, the dial wheel is driven to rotate and is used to drive the bolt to open. This invention enables the storage and release of lubricant by setting a lubrication ring between the lock cylinder housing and the tail rod structure. As the lock cylinder structure rotates, the internally stored lubricant is slowly released to lubricate the relatively rotating surfaces, reducing friction and wear between the lock cylinder housing and the tail rod structure, and achieving long-term self-lubrication.

[0039] It should be understood that the application of this utility model is not limited to the examples above. Those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. A self-lubricating lock cylinder structure, characterized in that, include: The lock cylinder consists of a direct-insertion cylinder, a lock cylinder housing, a lubrication ring sleeve, a tail rod structure, and a dial; among which... The direct-insertion lock cylinder is disposed in the lock cylinder housing and is used to insert the adapter key assembly. The tail end of the direct-insertion lock cylinder is fixedly connected to the tail rod structure. When the adapter key assembly rotates, the direct-insertion lock cylinder drives the dial to rotate. The lubrication ring is sleeved on the tail rod structure. The inner surface of the lubrication ring is rotatably connected to the tail rod structure, and the outer surface of the lubrication ring is rotatably connected to the lock cylinder housing. The lubrication ring is used to store lubricant and release lubricant to the tail rod structure and the lock cylinder housing during rotation. When the tail rod structure rotates, it drives the dial wheel to rotate; The dial is sleeved on the straight-insertion lock cylinder and is locked in place with the straight-insertion lock cylinder; when the straight-insertion lock cylinder rotates, the dial is driven to rotate and is used to drive the lock tongue to open.

2. The self-lubricating lock cylinder structure according to claim 1, characterized in that, The lubrication ring sleeve is provided with several oil storage holes for storing lubricant.

3. The self-lubricating lock core structure according to claim 2, characterized in that, The oil storage through hole is one or more of the following: round hole, gourd hole, U-shaped hole, teardrop hole, and conical hole.

4. The self-lubricating lock cylinder structure according to claim 1, characterized in that, It also includes a retaining ring, which abuts against the tail rod structure and the lubrication ring sleeve respectively, to prevent the lubrication ring sleeve from sliding forward axially.

5. The self-lubricating lock cylinder structure according to claim 4, characterized in that, The lubrication ring sleeve has a positioning part at its front end. The thickness of the positioning part is greater than the thickness of the lubrication ring sleeve. The positioning part is used to abut against the lock cylinder housing to prevent the lubrication ring sleeve from sliding backward along the axial direction.

6. The self-lubricating lock cylinder structure according to claim 1, characterized in that, The tail rod structure includes a bushing and a lock cylinder tail rod. The tail of the bushing is provided with an accommodating space, and a fixing post is provided in the accommodating space. One end of the lock cylinder tail rod has a fixing through hole, which is inserted into the fixing post.

7. The self-lubricating lock cylinder structure according to claim 1, characterized in that, The lubrication ring is a copper lubrication ring or a polyoxymethylene lubrication ring.

8. The self-lubricating lock cylinder structure according to claim 1, characterized in that, The lock cylinder housing is a stainless steel lock cylinder housing.

9. A smart door lock, characterized in that, The smart door lock includes a motor, a self-lubricating lock cylinder structure as described in any one of claims 1-8, a bolt drive module, and a bolt; wherein... The motor is connected to the tail rod structure of the self-lubricating lock core structure. When the motor rotates, the dial wheel is driven to rotate through the tail rod structure. The dial of the self-lubricating lock cylinder structure is connected to the lock tongue drive module. When the self-lubricating lock cylinder structure is inserted into and the adapter key assembly is rotated, the dial rotates. The latch drive module is fixedly connected to the latch and is used to activate and drive the latch to retract when the dial rotates, so as to open the smart door lock.

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