Single-row chain wheel structure and multi-row chain wheel structure capable of automatic lubrication

Abstract

The utility model discloses a single chain wheel structure of can automatic lubrication, chain wheel is fixed on the steel bushing, first annular oil absorption bubble cotton is located chain wheel front part, second annular oil absorption bubble cotton is located chain wheel rear part, the core shaft front section is supported in the inner hole of steel bushing through first rolling bearing and second rolling bearing, and the core shaft rear section is out of the inner hole of steel bushing, the circumference of the core shaft between first rolling bearing and second rolling bearing is equipped with a plurality of first oil hole, and the circumference of the core shaft outside steel bushing is equipped with the oil inlet that is communicated with each first oil hole through the core shaft internal passage, a plurality of second oil holes are equipped on the inner hole wall of steel bushing, and the outer end of each second oil hole is all provided with the distribution oil hole that is communicated with corresponding second oil hole. The utility model discloses still based on same concept's the multi-row chain wheel structure of can automatic lubrication, and the above structure has the advantages such as good lubrication uniformity, will not pollute the surrounding environment, can realize the mute stable operation, and the use cost is low.

Description

Technical Field

[0001] This utility model relates to the field of chain drive lubrication technology, and in particular to a single-row sprocket structure that can automatically lubricate and a multi-row sprocket structure that can automatically lubricate. Background Technology

[0002] Chain drives consist of driving and driven sprockets mounted on parallel shafts and a ring chain wound around the sprockets. The chain acts as a flexible intermediate element, transmitting motion and power through the meshing of the chain and sprocket teeth. They offer advantages such as accurate average transmission ratio, reliable operation, high efficiency, high power transmission, strong overload capacity, and the ability to operate in harsh environments including high temperature, humidity, dust, and pollution. They are widely used in transportation, agriculture, light industry, mining, petrochemicals, and machine tool industries.

[0003] In the operation of chain drives, lubrication is necessary to reduce wear on the chain and sprockets, lower temperature and dampen vibrations, and ensure smooth chain operation. Common lubrication methods include manual lubrication, drip lubrication, and oil bath lubrication. However, these methods all have the following main drawbacks: firstly, they cannot achieve uniform distribution of lubricating oil, affecting the stable operation of the chain drive; secondly, they can cause oil leaks, splashes, and oil droplets, polluting the environment. Utility Model Content

[0004] To address the shortcomings of existing technologies, the technical problem to be solved by this utility model is to provide a single-row sprocket structure that can automatically lubricate, which has good lubrication uniformity, does not pollute the surrounding environment, can achieve quiet and stable operation, is durable, and has low operating costs, as well as a multi-row sprocket structure that can automatically lubricate.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a single-row sprocket structure capable of automatic lubrication includes: a sprocket, a spindle, a steel sleeve, a first annular oil-absorbing foam, a second annular oil-absorbing foam, a first rolling bearing, and a second rolling bearing; The sprocket is fixedly sleeved on the steel sleeve; the first annular oil-absorbing foam is inserted from the front end of the mandrel and then attached to the front end face of the sprocket, and the first annular oil-absorbing foam is fixed to the steel sleeve and / or the front end face of the sprocket; the second annular oil-absorbing foam is inserted from the rear end of the mandrel and then attached to the rear end face of the sprocket, and the second annular oil-absorbing foam is fixed to the steel sleeve and / or the rear end face of the sprocket. The front section of the mandrel is supported in the inner hole of the steel sleeve by a first rolling bearing and a second rolling bearing, and the rear section of the mandrel extends out of the inner hole of the steel sleeve. A plurality of first oil holes are formed on the circumferential surface of the mandrel located between the first rolling bearing and the second rolling bearing, and an oil inlet is formed on the circumferential surface of the mandrel located outside the steel sleeve. The oil inlet communicates with each of the first oil holes through an internal channel of the mandrel. A plurality of second oil holes are formed on the inner wall of the steel sleeve. At the outer end of each second oil hole, a distribution oil hole communicating with the corresponding second oil hole is provided. Each distribution oil hole penetrates the outer circumferential wall of the steel sleeve, forming an open opening on the outer circumferential wall of the steel sleeve. The size and position of the open opening of the distribution oil hole are such that the lubricating oil in the distribution oil hole can reach the first annular oil-absorbing foam and the second annular oil-absorbing foam through the open opening.

[0006] Furthermore, in the aforementioned single-row sprocket structure capable of automatic lubrication, a front rolling bearing mounting hole and a front sealing component mounting hole are sequentially formed at the front end of the inner hole of the steel sleeve; the first rolling bearing is fitted into the front rolling bearing mounting hole, and a front sealing component and a front retaining ring are provided in the front sealing component mounting hole. The front retaining ring has a protruding front support protrusion at its front end. The front retaining ring is located between the first rolling bearing and the front sealing component, and the inner ring of the first rolling bearing is abutted by the front support protrusion, while the outer ring of the first rolling bearing is abutted by the stepped surface between the front rolling bearing mounting hole and the front sealing component mounting hole. A rear rolling bearing mounting hole and a rear sealing component mounting hole are sequentially formed at the rear end of the inner hole of the steel sleeve. The second rolling bearing is fitted into the rear rolling bearing mounting hole. A rear sealing component and a rear retaining ring are provided in the rear sealing component mounting hole. The rear retaining ring has a protruding rear support protrusion at its rear end. The rear retaining ring is located between the second rolling bearing and the rear sealing component. The inner ring of the second rolling bearing is abutted by the rear support protrusion, and the outer ring of the second rolling bearing is abutted by the stepped surface between the rear rolling bearing mounting hole and the rear sealing component mounting hole.

[0007] Furthermore, in the aforementioned single-row sprocket structure capable of automatic lubrication, the spindle is integrally formed from a front spindle and a rear spindle, and the diameter of the front spindle is smaller than the diameter of the rear spindle; the steel sleeve, the first annular oil-absorbing foam made of polyurethane, the second annular oil-absorbing foam made of polyurethane, and the sprocket made of nylon are all mounted on the front spindle; A rear washer is fitted onto the front mandrel. The rear of the rear washer blocks the front end face of the rear mandrel, and the front of the rear washer blocks the rear end face of the second annular oil-absorbing foam, the rear end face of the steel sleeve, and the rear end face of the second rolling bearing. An axial limiting member is provided at the front of the mandrel, and a front washer is provided at the rear end of the axial limiting member. The front of the front washer is attached to the axial limiting member, and the rear of the front washer is attached to the front end face of the first annular oil-absorbing foam, the front end face of the steel sleeve, and the front end face of the first rolling bearing.

[0008] Furthermore, in the aforementioned single-row sprocket structure capable of automatic lubrication, the first oil holes are evenly spaced around the circumference of the spindle, and the second oil holes are evenly spaced around the inner wall of the steel sleeve. The number of the first oil holes and the number of the second oil holes are the same, and the axes of the first oil holes and the axes of the second oil holes are all on the same plane.

[0009] Furthermore, in the aforementioned single-row sprocket structure capable of automatic lubrication, a plurality of through holes are provided in the area of ​​the sprocket covered by the first and second annular oil-absorbing foams. Each through hole is filled by a corresponding protrusion on the rear end face of the first annular oil-absorbing foam, or each through hole is filled by a corresponding protrusion on the front end face of the second annular oil-absorbing foam, or each through hole is filled by both the corresponding protrusion on the rear end face of the first and second annular oil-absorbing foams and the corresponding protrusion on the front end face of the second annular oil-absorbing foam, or the first annular oil-absorbing foam, the second annular oil-absorbing foam, and the oil-absorbing foam filling each through hole are integrally cast.

[0010] The aforementioned single-row sprocket structure with automatic lubrication is used for single-chain drives. For multi-row chain drives, this solution also provides a multi-row sprocket structure with automatic lubrication.

[0011] The aforementioned multi-row sprocket structure capable of automatic lubrication includes: two or more sprockets; characterized in that: it further includes: a spindle, a steel sleeve, a first annular oil-absorbing foam, a second annular oil-absorbing foam, at least one intermediate layer of oil-absorbing foam, a first rolling bearing, and a second rolling bearing; Each sprocket is fixedly fitted onto a steel sleeve at intervals, and an intermediate layer of oil-absorbing foam is fitted onto the steel sleeve between each pair of adjacent sprockets; the first annular oil-absorbing foam is inserted from the front end of the mandrel and then attached to the front end face of the foremost sprocket, and the first annular oil-absorbing foam is fixed to the steel sleeve or / and the front end face of the foremost sprocket; the second annular oil-absorbing foam is inserted from the rear end of the mandrel and then attached to the rear end face of the last sprocket, and the second annular oil-absorbing foam is fixed to the steel sleeve or / and the rear end face of the last sprocket; The front section of the mandrel is supported in the inner hole of the steel sleeve by a first rolling bearing and a second rolling bearing, and the rear section of the mandrel extends out of the inner hole of the steel sleeve. A plurality of first oil holes are formed on the circumferential surface of the mandrel located between the first rolling bearing and the second rolling bearing, and an oil inlet is formed on the circumferential surface of the mandrel located outside the steel sleeve. The oil inlet is connected to each of the first oil holes through an internal channel of the mandrel. A plurality of second oil holes are formed on the inner wall of the steel sleeve. The second oil holes penetrate the outer circumferential wall of the steel sleeve, and the position distribution of each of the second oil holes is such that lubricating oil can reach the first annular oil-absorbing foam, the second annular oil-absorbing foam and each intermediate layer oil-absorbing foam through each of the second oil holes.

[0012] Furthermore, in the aforementioned multi-row sprocket structure capable of automatic lubrication, a front rolling bearing mounting hole and a front sealing component mounting hole are sequentially formed at the front end of the inner hole of the steel sleeve; the first rolling bearing is fitted into the front rolling bearing mounting hole, and a front sealing component and a front retaining ring are provided in the front sealing component mounting hole. The front retaining ring has a protruding front support protrusion at its front end. The front retaining ring is located between the first rolling bearing and the front sealing component, and the inner ring of the first rolling bearing is abutted by the front support protrusion, while the outer ring of the first rolling bearing is abutted by the stepped surface between the front rolling bearing mounting hole and the front sealing component mounting hole. A rear rolling bearing mounting hole and a rear sealing component mounting hole are sequentially formed at the rear end of the inner hole of the steel sleeve. The second rolling bearing is fitted into the rear rolling bearing mounting hole. A rear sealing component and a rear retaining ring are provided in the rear sealing component mounting hole. The rear retaining ring has a protruding rear support protrusion at its rear end. The rear retaining ring is located between the second rolling bearing and the rear sealing component. The inner ring of the second rolling bearing is abutted by the rear support protrusion, and the outer ring of the second rolling bearing is abutted by the stepped surface between the rear rolling bearing mounting hole and the rear sealing component mounting hole.

[0013] Furthermore, in the aforementioned multi-row sprocket structure capable of automatic lubrication, the spindle is integrally formed from a front spindle and a rear spindle, and the diameter of the front spindle is smaller than the diameter of the rear spindle; the steel sleeve, the first annular oil-absorbing foam made of polyurethane, the second annular oil-absorbing foam made of polyurethane, the intermediate layer oil-absorbing foam made of polyurethane, and the sprocket made of nylon are all mounted on the front spindle; A rear washer is fitted onto the front mandrel. The rear of the rear washer blocks the front end face of the rear mandrel, and the front of the rear washer blocks the rear end face of the second annular oil-absorbing foam, the rear end face of the steel sleeve, and the rear end face of the second rolling bearing. An axial limiting member is provided at the front of the mandrel, and a front washer is provided at the rear end of the axial limiting member. The front of the front washer is attached to the axial limiting member, and the rear of the front washer is attached to the front end face of the first annular oil-absorbing foam, the front end face of the steel sleeve, and the front end face of the first rolling bearing.

[0014] Furthermore, in the aforementioned multi-row sprocket structure capable of automatic lubrication, the number of each first oil hole and the number of each second oil hole are the same, and when the spindle rotates one revolution, there exists at least one angle that aligns each first oil hole with each second oil hole in a one-to-one correspondence. A more preferred embodiment is that the axes of each first oil hole and each second oil hole are parallel.

[0015] Furthermore, in the aforementioned multi-row sprocket structure capable of automatic lubrication, the first annular oil-absorbing foam, the second annular oil-absorbing foam, and the intermediate annular oil-absorbing foam are collectively referred to as oil-absorbing foam. Several through holes are formed in the area covered by the oil-absorbing foam on each sprocket. Each through hole is filled by a corresponding protrusion on the rear end face of the oil-absorbing foam located in front of the through hole, or by a corresponding protrusion on the front end face of the oil-absorbing foam located behind the through hole, or by a combination of the corresponding protrusions on the rear end face of the oil-absorbing foam located in front of the through hole and the corresponding protrusions on the front end face of the oil-absorbing foam located behind the through hole, or by the first annular oil-absorbing foam, the second annular oil-absorbing foam, each intermediate annular oil-absorbing foam, and the oil-absorbing foam filling each through hole forming a single cast structure.

[0016] The beneficial effects of this utility model are: ① The sprocket is made of wear-resistant non-metallic nylon, which can achieve silent operation; the oil-absorbing foam is made of polyurethane, which has good oil absorption, wear resistance and elasticity, which can ensure the amount of lubrication, improve the uniformity of lubrication and the durability of the oil-absorbing foam; ② The single-row sprocket structure and the multi-row sprocket structure that can automatically lubricate are self-sealed and will not have oil leakage problems. In addition, the overall structure design also ensures that the lubrication structure will not cause splashing, oil droplets, oil leakage and other environmental pollution during use; ③ Through the cooperation of various components, the lubricating oil can be ensured to reach the key lubrication points of the chain, further improving the lubrication performance of the chain drive. In addition, the lubrication structure is integrated with the sprocket, making the overall structure more durable and effectively reducing the intensity and cost of daily maintenance. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a single-row sprocket structure that can automatically lubricate, as described in this utility model.

[0018] Figure 2 yes Figure 1 A schematic diagram of the structure viewed from the left.

[0019] Figure 3 This is a schematic diagram of another structure of the single-row sprocket structure that can automatically lubricate, as described in this utility model.

[0020] Figure 4 This is a schematic diagram of a multi-row sprocket structure that can automatically lubricate, as described in this utility model.

[0021] Among them, the appendix Figure 1 To be continued Figure 4 Figure label explanation: 1. Sprocket; 101. Through hole; 2. Mandrel; 21. First oil hole; 22. Oil inlet; 23. Internal channel; 24. Front mandrel; 25. Rear mandrel; 3. Steel sleeve; 31. Second oil hole; 32. Distribution oil hole; 321. Opening; 33. Front rolling bearing mounting hole; 34. Front sealing assembly mounting hole; 35. Rear rolling bearing mounting hole; 36. Rear sealing assembly mounting hole; 4. First annular oil-absorbing foam; 5. Second annular oil-absorbing foam; 6. First rolling bearing; 7. Second rolling bearing; 8. Front sealing assembly; 9. Front retaining ring; 91. Front support protrusion; 10. Rear sealing assembly; 11. Rear retaining ring; 111. Rear support protrusion; 12. Rear washer; 13. Front washer; 14. Retaining ring; 15. Bolt; 16. Intermediate layer oil-absorbing foam. Detailed Implementation

[0022] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and preferred embodiments.

[0023] Exemplary embodiments will be described more fully below with reference to the accompanying drawings; however, these exemplary embodiments may be embodied in different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will enable those skilled in the art to fully understand the scope of this disclosure. Example 1

[0024] For ease of description, this embodiment uses Figure 1 The left-hand direction shown is defined as "forward". Figure 1The right-hand direction shown is defined as "rear," and all directional terms involving "front" and "rear" in this invention are defined according to this direction. In the description of this invention, it should be noted that the terms "front," "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0025] The self-lubricating single-row sprocket structure described in this embodiment can be used as a driving sprocket or a tensioning sprocket. This self-lubricating single-row sprocket structure can be used as any sprocket in a chain drive.

[0026] like Figure 1 and Figure 2 As shown in the figure, the single-row sprocket structure capable of automatic lubrication described in this embodiment includes: a sprocket 1, a spindle 2, a steel sleeve 3, a first annular oil-absorbing foam 4, a second annular oil-absorbing foam 5, a first rolling bearing 6, and a second rolling bearing 7. The sprocket 1 is fixedly sleeved on the steel sleeve 3.

[0027] The first annular oil-absorbing foam 4 is inserted through the front end of the mandrel 2 and then attached to the front end face of the sprocket 1. The first annular oil-absorbing foam 4 can be fixed to the steel sleeve 3, fixed to the sprocket 1 (i.e., fixed to the front end face of the sprocket 1), or fixed to both the steel sleeve 3 and the front end face of the sprocket 1. Any of these three methods can be selected as needed.

[0028] The second annular oil-absorbing foam 5 is inserted into the rear end of the mandrel 2 and then attached to the rear end face of the sprocket 1. The second annular oil-absorbing foam 5 can be fixed in three ways: it can be fixed to the steel sleeve 3; it can be fixed to the sprocket 1, i.e., fixed to the rear end face of the sprocket 1; or it can be fixed to both the steel sleeve 3 and the rear end face of the sprocket 1. The appropriate method can be selected as needed.

[0029] The fixing methods for the sprocket 1 to the steel sleeve 3, the fixing methods for the first annular oil-absorbing foam 4, and the fixing methods for the second annular oil-absorbing foam 5 are not specified here; any existing fixing methods that meet the requirements can be used. For example, the first annular oil-absorbing foam 4 and the second annular oil-absorbing foam 5 can be fixed with strong adhesive.

[0030] like Figure 1As shown, the front section of the mandrel 2 is supported in the inner hole of the steel sleeve 3 by a first rolling bearing 6 and a second rolling bearing 7, while the rear section of the mandrel 2 extends out of the inner hole of the steel sleeve 3. At this time, the mandrel 2 can rotate freely around its own axis within the steel sleeve 3. Several first oil holes 21 are formed on the circumferential surface of the mandrel 2 located between the first rolling bearing 6 and the second rolling bearing 7, and an oil inlet 22 is formed on the circumferential surface of the mandrel 2 outside the steel sleeve 3. The oil inlet 22 communicates with each of the first oil holes 21 through an internal channel 23 in the mandrel 2. A plurality of second oil holes 31 are provided on the inner wall of the steel sleeve 3. At the outer end of each second oil hole 31, a distribution oil hole 32 is provided that communicates with the corresponding second oil hole 31. Each distribution oil hole 32 penetrates the outer circumferential wall of the steel sleeve 3, forming an open opening 321 on the outer circumferential wall of the steel sleeve 3. The size and position of the open opening 321 of the distribution oil hole 32 are such that the lubricating oil in the distribution oil hole 32 can reach the first annular oil-absorbing foam 4 and the second annular oil-absorbing foam 5 through the open opening 321.

[0031] The oil inlet 22 can be filled manually or connected to a pipeline with control components that enable automatic, timed filling. When lubricating oil is added to the oil inlet 22, it passes through the internal channel 23 and the first oil filling holes 21 to reach the gap between the spindle 2 and the steel sleeve 3. Then, it is distributed to the first annular oil-absorbing foam 4 and the second annular oil-absorbing foam 5 through the second oil holes 31 and the open openings 321 of the corresponding distribution holes 32. The amount of oil added ensures that the oil stored in the first annular oil-absorbing foam 4 and the second annular oil-absorbing foam 5 after absorption meets the required requirements. When the chain winds around the sprocket 1 of this single-row sprocket structure, the first annular oil-absorbing foam 4 and the second annular oil-absorbing foam 5 are in micro-contact with the chain. As the sprocket 1 rotates, the chain and sprocket 1 generate relative motion, gently squeezing the first and second annular oil-absorbing foams 4 and 5. This causes the first and second annular oil-absorbing foams 4 and 5 to evenly spread the lubricating oil they store to the high points of the chain plates through micro-contact and gentle squeezing. The lubricating oil slowly penetrates from the high points of the chain plates to the chain plates, rollers, and chain pins, achieving lubrication of key points of the chain. The lubrication application is uniform, greatly improving lubrication performance and ensuring the normal and stable operation of the chain. In addition, it can reduce the daily maintenance workload of workers and improve work efficiency. It can be applied to high, medium, and low-speed application scenarios in non-high-temperature areas.

[0032] In this embodiment, as Figure 1 As shown, the specific arrangement of the front section of the mandrel 2 being supported in the inner hole of the steel sleeve 3 by the first rolling bearing 6 and the second rolling bearing 7 is as follows: A front rolling bearing mounting hole 33 and a front sealing component mounting hole 34 are sequentially formed at the front end of the inner hole of the steel sleeve 3. The first rolling bearing 6 is fitted into the front rolling bearing mounting hole 33. A front sealing component 8 and a front retaining ring 9 are provided in the front sealing component mounting hole 34. The front retaining ring 9 has a protruding front support protrusion 91 at its front end. The front retaining ring 9 is located between the first rolling bearing 6 and the front sealing component 8. The inner ring of the first rolling bearing 6 is abutted by the front support protrusion 91, and the outer ring of the first rolling bearing 6 is abutted by the stepped surface between the front rolling bearing mounting hole 33 and the front sealing component mounting hole 34. At this time, the first rolling bearing 6 is axially positioned from the rear by the stepped surface between the front rolling bearing mounting hole 33 and the front sealing component mounting hole 34 and the front support protrusion 91.

[0033] A rear rolling bearing mounting hole 35 and a rear sealing assembly mounting hole 36 are sequentially formed at the rear end of the inner hole of the steel sleeve 3. The second rolling bearing 7 is fitted into the rear rolling bearing mounting hole 35. A rear sealing assembly 10 and a rear retaining ring 11 are provided in the rear sealing assembly mounting hole 36. The rear retaining ring 11 has a protruding rear support protrusion 111 at its rear end. The rear retaining ring 11 is located between the second rolling bearing 7 and the rear sealing assembly 10, and the inner ring of the second rolling bearing 7 is abutted by the rear support protrusion 111, while the outer ring of the second rolling bearing 7 is abutted by the stepped surface between the rear rolling bearing mounting hole 35 and the rear sealing assembly mounting hole 36. At this time, the second rolling bearing 7 is axially positioned on the front side by the stepped surface between the rear rolling bearing mounting hole 35 and the rear sealing assembly mounting hole 36 and the rear support protrusion 111.

[0034] The front sealing component 8 and the rear sealing component 10 can be common sealing components on the market, such as sealing rings. There are no requirements on the specific type of sealing component used, as long as the single-row sprocket structure itself does not have oil leakage problems.

[0035] Compared to traditional methods such as drip lubrication, oil-air lubrication, and manual brushing of lubricating oil, the single-row sprocket structure of this invention, which can automatically lubricate, has a built-in seal. During use, lubricating oil is stored through the first annular oil-absorbing foam 4 and the second annular oil-absorbing foam 5, and released through micro-contact and light squeezing of the first annular oil-absorbing foam 4 and the second annular oil-absorbing foam 5. Therefore, it will not produce splashes, oil droplets, or other environmental pollution.

[0036] In this embodiment, as Figure 1 and Figure 3As shown, the mandrel 2 is integrally formed from a front mandrel 24 and a rear mandrel 25, and the diameter of the front mandrel 24 is smaller than the diameter of the rear mandrel 25. The steel sleeve 3, the first annular oil-absorbing foam 4, the second annular oil-absorbing foam 5, and the sprocket 1 are all mounted on the front mandrel 2.

[0037] Among them, the sprocket 1 is made of wear-resistant non-metallic nylon, which can achieve silent operation; the first annular oil-absorbing foam 4 and the second annular oil-absorbing foam 5 are both made of polyurethane. Polyurethane has good oil absorption, wear resistance and elasticity, which can ensure the amount of lubricating oil stored in the first annular oil-absorbing foam 4 and the second annular oil-absorbing foam 5, better control the degree of contact with the chain plate, and improve the uniformity of lubrication and overall durability.

[0038] In this embodiment, as Figure 1 and Figure 3 As shown, a rear washer 12 is fitted onto the front mandrel 24. The rear of the rear washer 12 blocks the front end face of the rear mandrel 24, and the front of the rear washer 12 blocks the rear end face of the second annular oil-absorbing foam 5, the rear end face of the steel sleeve 3, and the rear end face of the second rolling bearing 7. An axial limiting member is provided at the front of the mandrel 2, and a front washer 13 is provided at the rear end of the axial limiting member. The front of the front washer 13 is attached to the axial limiting member, and the rear of the front washer 13 is attached to the front end face of the first annular oil-absorbing foam 4, the front end face of the steel sleeve 3, and the front end face of the first rolling bearing 6.

[0039] The axial limiting component can be a combination of a retaining ring 14 and a screw / bolt 15, or other forms may be used. The outer contour of the rear washer 12 must not exceed the outer contour of the second annular oil-absorbing foam 5, and must be smaller than the outer contour of the second annular oil-absorbing foam 5, to ensure that the rear washer 12 will not touch the chain during use. The outer contour of the front washer 13 must not exceed the outer contour of the first annular oil-absorbing foam 5, and must be smaller than the outer contour of the first annular oil-absorbing foam 4, to ensure that the front washer 13 will not touch the chain during use.

[0040] like Figure 1 and Figure 3 As shown, a more preferred embodiment is that the first oil holes 21 are evenly spaced around the circumference of the mandrel 2, and the second oil holes 31 are evenly spaced around the inner wall of the steel sleeve 3. The number of the first oil holes 21 and the number of the second oil holes 31 are the same, and the axes of the first oil holes 21 and the second oil holes 31 are all on the same plane. With this configuration, when the mandrel 2 rotates relative to the steel sleeve 3 to one or more angles, the first oil holes 21 and the second oil holes 31 will be aligned one-to-one, improving lubrication efficiency.

[0041] like Figure 3As shown, a more preferred embodiment is: several through holes 101 are provided on the sprocket 1 in the area covered by the first annular oil-absorbing foam 4 and the second annular oil-absorbing foam 5, extending from front to back. Each through hole 101 is filled by a corresponding protrusion on the rear end face of the first annular oil-absorbing foam 4, or by a corresponding protrusion on the front end face of the second annular oil-absorbing foam 5, or by a combination of the corresponding protrusions on the rear end face of the first annular oil-absorbing foam 4 and the corresponding protrusions on the front end face of the second annular oil-absorbing foam 5. Providing these through holes 101 allows for a more uniform oil storage volume in the first annular oil-absorbing foam 4 and the second annular oil-absorbing foam 5, and also facilitates the installation and fixation of the first annular oil-absorbing foam 4 and the second annular oil-absorbing foam 5, as shown in the attached figure. Figure 3 The diagram shown illustrates how each through hole 101 is filled by corresponding protrusions on the rear sidewall of the first annular oil-absorbing foam 4 and corresponding protrusions on the front sidewall of the second annular oil-absorbing foam 5. The most significant advantage is that the through holes 101 prevent oil leakage between the oil-absorbing foam (first annular oil-absorbing foam 4, second annular oil-absorbing foam 5) and the sprocket 1. Furthermore, the first annular oil-absorbing foam 4 and the second annular oil-absorbing foam 5 can be integrally cast; in this case, each through hole 101 acts as a flow channel for polyurethane flow during casting. This allows the first annular oil-absorbing foam 4, the second annular oil-absorbing foam 5, and the oil-absorbing foam filling each through hole 101 to be integrally cast and molded. The optimal solution is to make each through hole 101 evenly spaced along the circumferential direction. Example 2

[0042] The multi-row sprocket structure with automatic lubrication described in this embodiment can be used as a driving sprocket or a tensioning sprocket. This automatic lubrication multi-row sprocket structure can be used as any sprocket in a chain drive.

[0043] like Figure 4 As shown in the figure, the multi-row sprocket structure capable of automatic lubrication described in this embodiment includes: two or more sprockets 1, a spindle 2, a steel sleeve 3, a first annular oil-absorbing foam 4, a second annular oil-absorbing foam 5, at least one intermediate layer oil-absorbing foam 16, a first rolling bearing 6, and a second rolling bearing 7.

[0044] Each sprocket 1 is fixedly fitted onto the steel sleeve 3 at intervals. The interval between each sprocket 1 is determined according to the distance between any two adjacent chains in the multi-row chain. An intermediate layer of oil-absorbing foam 16 is fitted onto the steel sleeve 3 between any two adjacent sprockets 1. At this time, the intermediate layer of oil-absorbing foam 16 is sandwiched between the two adjacent sprockets 1. The intermediate layer of oil-absorbing foam 16 can be directly fitted without fixing, or it can be fixed to the steel sleeve 3, or it can be fixed to the end faces of the front and rear sprockets 1, or it can be fixed to both the steel sleeve 3 and the end faces of the front and rear sprockets 1.

[0045] The first annular oil-absorbing foam 4 is inserted through the front end of the mandrel 2 and then attached to the front end face of the foremost sprocket 1. The first annular oil-absorbing foam 4 can be fixed to the steel sleeve 3, or fixed to the foremost sprocket 1 (i.e., fixed to its front end face), or fixed to both the steel sleeve 3 and the front end face of the foremost sprocket 1. The three methods can be selected as needed.

[0046] The second annular oil-absorbing foam 5 is inserted from the rear end of the mandrel 2 and then attached to the rear end face of the sprocket 1 located at the rearmost side. The second annular oil-absorbing foam 5 can be fixed in three ways: it can be fixed to the steel sleeve 3; it can be fixed to the sprocket 1 located at the rearmost side, i.e., fixed to the rear end face of the sprocket 1 located at the rearmost side; or it can be fixed to both the steel sleeve 3 and the rear end face of the sprocket 1 located at the rearmost side. The three methods can be selected as needed.

[0047] The fixing methods for the sprocket 1 to the steel sleeve 3, the fixing methods for the first annular oil-absorbing foam 4, the fixing methods for the second annular oil-absorbing foam 5, and the fixing methods for the middle layer oil-absorbing foam 16 are not required here; any existing fixing methods that meet the fixing requirements can be used.

[0048] like Figure 4As shown, the front section of the mandrel 2 is supported in the inner hole of the steel sleeve 3 by a first rolling bearing 6 and a second rolling bearing 7, while the rear section of the mandrel 2 extends out of the inner hole of the steel sleeve 3. At this time, the mandrel 2 can rotate freely around its own axis within the steel sleeve 3. Several first oil holes 21 are formed on the circumferential surface of the mandrel 2 located between the first rolling bearing 6 and the second rolling bearing 7, and an oil inlet 22 is formed on the circumferential surface of the mandrel 2 outside the steel sleeve 3. The oil inlet 22 communicates with each of the first oil holes 21 through an internal channel 23 in the mandrel 2. Several second oil holes 31 are formed on the inner wall of the steel sleeve 3, each second oil hole 31 penetrating the outer circumferential wall of the steel sleeve 3. The positions of the second oil holes 31 are distributed such that lubricating oil can reach the first annular oil-absorbing foam 4, the second annular oil-absorbing foam 5, and each intermediate layer oil-absorbing foam 16 through the second oil holes 31. The optimal solution is that there must be at least one second oil hole 31 on the steel sleeve 3 in the area where the first annular oil-absorbing foam 4 is located, at least one second oil hole 31 on the steel sleeve 3 in the area where the second annular oil-absorbing foam 5 is located, and at least one second oil hole 31 on the steel sleeve 3 in the area where the intermediate layer oil-absorbing foam 16 is located.

[0049] Figure 4 The diagram shows a double-row sprocket structure with two sprockets 1 and one intermediate oil-absorbing foam 16. Three-row sprocket structures, four-row sprocket structures, etc., add sprockets 1 and intermediate oil-absorbing foam 16 in the above arrangement.

[0050] The oil inlet 22 can be filled manually or connected via a pipeline with control components that enable automatic, timed filling. When lubricating oil is added to the oil inlet 22, it passes through the internal channel 23 and the first oil filling holes 21 to reach the gap between the spindle 2 and the steel sleeve 3. Then, it is sent through the second oil holes 31 to the first annular oil-absorbing foam 4, the second annular oil-absorbing foam 5, and the intermediate oil-absorbing foam 16, respectively. The amount of oil added ensures that the oil stored in the first annular oil-absorbing foam 4, the second annular oil-absorbing foam 5, and the intermediate oil-absorbing foam 16 after absorption meets the required requirements. When the chain is wound around the sprocket 1 of this single-row sprocket structure, the first annular oil-absorbing foam 4, the second annular oil-absorbing foam 5, and the intermediate oil-absorbing foam 16 are in micro-contact with the chain. As the sprocket 1 rotates, the chain and sprocket 1 generate relative motion, gently squeezing the first annular oil-absorbing foam 4, the second annular oil-absorbing foam 5, and the intermediate oil-absorbing foam 16. This causes the first annular oil-absorbing foam 4, the second annular oil-absorbing foam 5, and the intermediate oil-absorbing foam 16 to evenly spread the lubricating oil they store to the high points of the chain plates through micro-contact and gentle squeezing. The lubricating oil slowly penetrates from the high points of the chain plates to the chain plates, rollers, and chain pins, achieving lubrication of key points of the chain. The lubrication application is uniform, greatly improving lubrication performance and ensuring the normal and stable operation of the chain. In addition, it can reduce the daily maintenance workload of workers and improve work efficiency. It can be applied to high, medium, and low-speed application scenarios in non-high-temperature areas.

[0051] In this embodiment, the specific arrangement and sealing structure of the front section of the mandrel 2 being supported in the inner hole of the steel sleeve 3 by the first rolling bearing 6 and the second rolling bearing 7 can be referred to in Embodiment 1.

[0052] In this embodiment, as Figure 4 As shown, the mandrel 2 is integrally formed from a front mandrel 24 and a rear mandrel 25, and the diameter of the front mandrel 24 is smaller than the diameter of the rear mandrel 25. The steel sleeve 3, the first annular oil-absorbing foam 4, the second annular oil-absorbing foam 5, the intermediate oil-absorbing foam 16, and the sprocket 1 are all mounted on the front mandrel 2.

[0053] Among them, the sprocket 1 is made of wear-resistant non-metallic nylon, which can achieve silent operation; the first annular oil-absorbing foam 4, the second annular oil-absorbing foam 5, and the middle layer oil-absorbing foam 16 are all made of polyurethane. Polyurethane has good oil absorption, wear resistance and elasticity, which can ensure the amount of lubricating oil stored in the first annular oil-absorbing foam 4, the second annular oil-absorbing foam 5, and the middle layer oil-absorbing foam 16, better control the degree of contact with the chain plate, and improve the uniformity of lubrication and overall durability.

[0054] In this embodiment, as Figure 4As shown, a rear washer 12 is fitted onto the front spindle 24. The rear of the rear washer 12 blocks the front end face of the rear spindle 24, and the front of the rear washer 12 blocks the rear end face of the second annular oil-absorbing foam 5, the rear end face of the steel sleeve 3, and the rear end face of the second rolling bearing 7. An axial limiting member is provided on the front of the spindle 2, and a front washer 13 is provided at the rear end of the axial limiting member. The front of the front washer 13 is attached to the axial limiting member, and the rear of the front washer 13 is attached to the front end face of the first annular oil-absorbing foam 4, the front end face of the steel sleeve 3, and the front end face of the first rolling bearing 6. The outer contour of the rear washer 12 must not exceed the outer contour of the second annular oil-absorbing foam 5, and must be smaller than the outer contour of the second annular oil-absorbing foam 5. The smaller size ensures that the rear washer 12 will not touch the chain during use. The outer contour of the front washer 13 must not exceed the outer contour of the first annular oil-absorbing foam 5, and must be smaller than the outer contour of the first annular oil-absorbing foam 4. The smaller size ensures that the front washer 13 will not touch the chain during use.

[0055] like Figure 4 As shown, a more preferred solution is that the number of each first oil hole 21 is the same as the number of each second oil hole 31, and when the spindle 2 rotates one revolution, there is at least one angle that makes each first oil hole 21 and each second oil hole 31 correspond to each other in position. That is, when the spindle 2 rotates relative to the steel sleeve 3 to a certain angle or several angles, each first oil hole 21 and each second oil hole 31 will be in a one-to-one correspondence, thereby improving the lubrication efficiency.

[0056] A better solution is that the axes of the first oil holes 21 and the axes of the second oil holes 31 are parallel.

[0057] For ease of description, the first annular oil-absorbing foam 4, the second annular oil-absorbing foam 5, and the intermediate annular oil-absorbing foam 16 are collectively referred to as oil-absorbing foam. A more preferred solution is to divide each first oil hole 21 into a number of columns matching the number of oil-absorbing foams, with each column corresponding to one oil-absorbing foam, providing lubricating oil to that oil-absorbing foam. The first oil holes 21 in each column are evenly spaced along the circumferential direction.

[0058] like Figure 3As shown, a more preferred embodiment is that a plurality of through holes 101 are provided on the sprocket 1 in the area covered by the oil-absorbing foam. Each through hole 101 is filled by a corresponding protrusion on the rear end face of the oil-absorbing foam located in front of the through hole 101, or each through hole 101 is filled by a corresponding protrusion on the front end face of the oil-absorbing foam located behind the through hole, or each through hole 101 is filled by both the corresponding protrusion on the rear end face of the oil-absorbing foam located in front of the through hole 101 and the corresponding protrusion on the front end face of the oil-absorbing foam located behind the through hole 101. The most important advantage is that the through holes 101 ensure that there is no oil leakage or seepage between the oil-absorbing foam (first annular oil-absorbing foam 4, second annular oil-absorbing foam 5) and the sprocket 1. In addition, the first annular oil-absorbing foam 4, the second annular oil-absorbing foam 5, and each intermediate layer oil-absorbing foam 16 can be integrally cast. In this case, each through hole 101 serves as a flow channel for casting, allowing polyurethane to flow and be cast, so that the first annular oil-absorbing foam 4, the second annular oil-absorbing foam 5, each intermediate layer annular oil-absorbing foam 16, and the oil-absorbing foam filled in each through hole 11 are integrally cast and molded structures.

[0059] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any modifications or equivalent changes made based on the technical essence of the present utility model shall still fall within the scope of protection claimed by the present utility model.

Claims

1. A single-row sprocket structure capable of automatic lubrication, comprising: The sprocket is characterized by further comprising: a spindle, a steel sleeve, a first annular oil-absorbing foam, a second annular oil-absorbing foam, a first rolling bearing, and a second rolling bearing. The sprocket is fixedly sleeved on the steel sleeve; the first annular oil-absorbing foam is inserted from the front end of the mandrel and then attached to the front end face of the sprocket, and the first annular oil-absorbing foam is fixed to the steel sleeve and / or the front end face of the sprocket; the second annular oil-absorbing foam is inserted from the rear end of the mandrel and then attached to the rear end face of the sprocket, and the second annular oil-absorbing foam is fixed to the steel sleeve and / or the rear end face of the sprocket. The front section of the mandrel is supported in the inner hole of the steel sleeve by a first rolling bearing and a second rolling bearing, and the rear section of the mandrel extends out of the inner hole of the steel sleeve. A plurality of first oil holes are formed on the circumferential surface of the mandrel located between the first rolling bearing and the second rolling bearing, and an oil inlet is formed on the circumferential surface of the mandrel located outside the steel sleeve. The oil inlet communicates with each of the first oil holes through an internal channel of the mandrel. A plurality of second oil holes are formed on the inner wall of the steel sleeve. At the outer end of each second oil hole, a distribution oil hole communicating with the corresponding second oil hole is provided. Each distribution oil hole penetrates the outer circumferential wall of the steel sleeve, forming an open opening on the outer circumferential wall of the steel sleeve. The size and position of the open opening of the distribution oil hole are such that the lubricating oil in the distribution oil hole can reach the first annular oil-absorbing foam and the second annular oil-absorbing foam through the open opening.

2. The single-row sprocket structure capable of automatic lubrication according to claim 1, characterized in that: A front rolling bearing mounting hole and a front sealing component mounting hole are sequentially opened at the front end of the inner hole of the steel sleeve; the first rolling bearing is embedded in the front rolling bearing mounting hole, and a front sealing component and a front retaining ring are provided in the front sealing component mounting hole. The front retaining ring has a protruding front support protrusion at its front end. The front retaining ring is located between the first rolling bearing and the front sealing component, and the inner ring of the first rolling bearing is abutted by the front support protrusion, and the outer ring of the first rolling bearing is abutted by the stepped surface between the front rolling bearing mounting hole and the front sealing component mounting hole. A rear rolling bearing mounting hole and a rear sealing component mounting hole are sequentially formed at the rear end of the inner hole of the steel sleeve. The second rolling bearing is fitted into the rear rolling bearing mounting hole. A rear sealing component and a rear retaining ring are provided in the rear sealing component mounting hole. The rear retaining ring has a protruding rear support protrusion at its rear end. The rear retaining ring is located between the second rolling bearing and the rear sealing component. The inner ring of the second rolling bearing is abutted by the rear support protrusion, and the outer ring of the second rolling bearing is abutted by the stepped surface between the rear rolling bearing mounting hole and the rear sealing component mounting hole.

3. The single-row sprocket structure capable of automatic lubrication according to claim 2, characterized in that: The mandrel is integrally formed from a front mandrel and a rear mandrel, and the diameter of the front mandrel is smaller than the diameter of the rear mandrel; the steel sleeve, the first annular oil-absorbing foam made of polyurethane, the second annular oil-absorbing foam made of polyurethane, and the sprocket made of nylon are all mounted on the front mandrel. A rear washer is fitted onto the front mandrel. The rear of the rear washer blocks the front end face of the rear mandrel, and the front of the rear washer blocks the rear end face of the second annular oil-absorbing foam, the rear end face of the steel sleeve, and the rear end face of the second rolling bearing. An axial limiting member is provided at the front of the mandrel, and a front washer is provided at the rear end of the axial limiting member. The front of the front washer is attached to the axial limiting member, and the rear of the front washer is attached to the front end face of the first annular oil-absorbing foam, the front end face of the steel sleeve, and the front end face of the first rolling bearing.

4. The single-row sprocket structure capable of automatic lubrication according to claim 1, characterized in that: The first oil holes are evenly spaced around the circumference of the mandrel, and the second oil holes are evenly spaced around the inner wall of the steel sleeve. The number of the first oil holes and the number of the second oil holes are the same, and the axes of the first oil holes and the axes of the second oil holes are all on the same plane.

5. A single-row sprocket structure capable of automatic lubrication according to claim 1 or 4, characterized in that: The sprocket has several through holes extending from front to back in the area covered by the first and second annular oil-absorbing foam. Each through hole is filled with a corresponding protrusion on the rear end face of the first annular oil-absorbing foam, or each through hole is filled with a corresponding protrusion on the front end face of the second annular oil-absorbing foam, or each through hole is filled by both the corresponding protrusion on the rear end face of the first and second annular oil-absorbing foam and the corresponding protrusion on the front end face of the second annular oil-absorbing foam, or the first annular oil-absorbing foam, the second annular oil-absorbing foam, and the oil-absorbing foam filling each through hole are integrally cast.

6. A multi-row sprocket structure capable of automatic lubrication, comprising: Two or more sprockets; characterized in that: it further includes: a spindle, a steel sleeve, a first annular oil-absorbing foam, a second annular oil-absorbing foam, at least one intermediate layer of oil-absorbing foam, a first rolling bearing and a second rolling bearing; Each sprocket is fixedly fitted onto a steel sleeve at intervals, and an intermediate layer of oil-absorbing foam is fitted onto the steel sleeve between each pair of adjacent sprockets; the first annular oil-absorbing foam is inserted from the front end of the mandrel and then attached to the front end face of the foremost sprocket, and the first annular oil-absorbing foam is fixed to the steel sleeve or / and the front end face of the foremost sprocket; the second annular oil-absorbing foam is inserted from the rear end of the mandrel and then attached to the rear end face of the last sprocket, and the second annular oil-absorbing foam is fixed to the steel sleeve or / and the rear end face of the last sprocket; The front section of the mandrel is supported in the inner hole of the steel sleeve by a first rolling bearing and a second rolling bearing, and the rear section of the mandrel extends out of the inner hole of the steel sleeve. A plurality of first oil holes are formed on the circumferential surface of the mandrel located between the first rolling bearing and the second rolling bearing, and an oil inlet is formed on the circumferential surface of the mandrel located outside the steel sleeve. The oil inlet is connected to each of the first oil holes through an internal channel of the mandrel. A plurality of second oil holes are formed on the inner wall of the steel sleeve. The second oil holes penetrate the outer circumferential wall of the steel sleeve, and the position distribution of each of the second oil holes is such that lubricating oil can reach the first annular oil-absorbing foam, the second annular oil-absorbing foam and each intermediate layer oil-absorbing foam through each of the second oil holes.

7. The multi-row sprocket structure capable of automatic lubrication according to claim 6, characterized in that: A front rolling bearing mounting hole and a front sealing component mounting hole are sequentially opened at the front end of the inner hole of the steel sleeve; the first rolling bearing is embedded in the front rolling bearing mounting hole, and a front sealing component and a front retaining ring are provided in the front sealing component mounting hole. The front retaining ring has a protruding front support protrusion at its front end. The front retaining ring is located between the first rolling bearing and the front sealing component, and the inner ring of the first rolling bearing is abutted by the front support protrusion, and the outer ring of the first rolling bearing is abutted by the stepped surface between the front rolling bearing mounting hole and the front sealing component mounting hole. A rear rolling bearing mounting hole and a rear sealing component mounting hole are sequentially formed at the rear end of the inner hole of the steel sleeve. The second rolling bearing is fitted into the rear rolling bearing mounting hole. A rear sealing component and a rear retaining ring are provided in the rear sealing component mounting hole. The rear retaining ring has a protruding rear support protrusion at its rear end. The rear retaining ring is located between the second rolling bearing and the rear sealing component. The inner ring of the second rolling bearing is abutted by the rear support protrusion, and the outer ring of the second rolling bearing is abutted by the stepped surface between the rear rolling bearing mounting hole and the rear sealing component mounting hole.

8. The multi-row sprocket structure capable of automatic lubrication according to claim 7, characterized in that: The mandrel is integrally formed from a front mandrel and a rear mandrel, and the diameter of the front mandrel is smaller than the diameter of the rear mandrel; the steel sleeve, the first annular oil-absorbing foam made of polyurethane, the second annular oil-absorbing foam made of polyurethane, the middle layer oil-absorbing foam made of polyurethane, and the sprocket made of nylon are all installed on the front mandrel. A rear washer is fitted onto the front mandrel. The rear of the rear washer blocks the front end face of the rear mandrel, and the front of the rear washer blocks the rear end face of the second annular oil-absorbing foam, the rear end face of the steel sleeve, and the rear end face of the second rolling bearing. An axial limiting member is provided at the front of the mandrel, and a front washer is provided at the rear end of the axial limiting member. The front of the front washer is attached to the axial limiting member, and the rear of the front washer is attached to the front end face of the first annular oil-absorbing foam, the front end face of the steel sleeve, and the front end face of the first rolling bearing.

9. The multi-row sprocket structure capable of automatic lubrication according to claim 6, characterized in that: The number of each first oil hole is the same as the number of each second oil hole, and when the spindle rotates one revolution, there is at least one angle that makes each first oil hole and each second oil hole correspond to each other in position.

10. A multi-row sprocket structure capable of automatic lubrication according to claim 6 or 9, characterized in that: The first annular oil-absorbing foam, the second annular oil-absorbing foam, and the intermediate annular oil-absorbing foam are collectively referred to as oil-absorbing foam. Several through holes are provided on the area covered by the oil-absorbing foam on each sprocket. Each through hole is filled by a corresponding protrusion on the rear end face of the oil-absorbing foam located in front of the through hole, or by a corresponding protrusion on the front end face of the oil-absorbing foam located behind the through hole, or by a combination of the corresponding protrusions on the rear end face of the oil-absorbing foam located in front of the through hole and the corresponding protrusions on the front end face of the oil-absorbing foam located behind the through hole, or the first annular oil-absorbing foam, the second annular oil-absorbing foam, each intermediate annular oil-absorbing foam, and the oil-absorbing foam filling each through hole are integrally cast structures.

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