Leather buffing roller and leather buffing equipment

Abstract

The invention discloses a leather buffing roller and leather buffing equipment. The leather buffing roller comprises an outer roller body, an inner roller body and a liquid inlet assembly. The inner roller body is coaxially arranged in the outer roller body, and the inner roller body and the outer roller body are spaced in the radial direction of the inner roller body so as to define a heat exchange channel. The width of the heat exchange channel in the radial direction is smaller than the diameter of a cylindrical heat exchange channel formed in the axial direction of a traditional leather buffing roller, and the heat exchange channel in the embodiment can be rapidly filled with cooling water. The liquid inlet assembly is arranged at one end of the outer roller body and provided with a liquid inlet flow dividing channel with a plurality of first flow dividing openings, the liquid inlet flow dividing channel communicates with the heat exchange channel through the first flow dividing openings, and the multiple first flow dividing openings are distributed in the circumferential direction of the heat exchange channel at intervals. By means of the structure, the heat exchange liquid can be pushed to be full in the circumferential direction in a segmented mode, so that the heat exchange liquid is distributed in the whole heat exchange channel, full-coverage heat exchange is formed on the inner wall of the outer roller body, and the heat exchange effect is improved.

Description

Technical Field

[0001] This application relates to the field of leather polishing roller technology, specifically to a leather polishing roller and leather polishing equipment. Background Technology

[0002] Leather is animal hide that has undergone physical and chemical processing such as hair removal and tanning, resulting in a modified, less perishable material. It is composed of tightly woven natural protein fibers in three-dimensional space, with a unique grain layer on its surface that gives it a natural grain and luster, and a comfortable feel. During leather production, a buffing machine is used to refine the leather surface, improving its appearance and overall comfort.

[0003] Traditional leather polishing machines consist of polishing rollers. These rollers rotate to polish the leather. During polishing, the rollers rub against the leather, generating heat. To prevent excessive heat from affecting the polishing effect, the polishing rollers are typically made with a hollow structure. Coolant is continuously introduced into and discharged from this hollow structure, carrying away the heat and achieving cooling.

[0004] However, because the leather polishing roller needs to rotate continuously during operation, the coolant entering the hollow structure cannot fill the hollow structure and always remains in the lower half of the hollow structure. Furthermore, due to the rotation, the flow of coolant is disordered, resulting in an unsatisfactory surface heat exchange effect of the leather polishing roller, which affects the leather polishing effect. Summary of the Invention

[0005] This application provides a leather grinding roller and leather polishing equipment to improve the problem of unsatisfactory cooling effect of the leather grinding roller.

[0006] In a first aspect, embodiments of this application provide a leather polishing roller and leather polishing equipment, including: outer roller body; The inner roller body is coaxially disposed within the outer roller body and spaced apart from the outer roller body in the radial direction of the outer roller body, thereby defining a heat exchange channel; The liquid inlet assembly is located at one end of the outer roller body and has a liquid inlet diversion channel with multiple first diversion ports. The liquid inlet diversion channel is connected to the heat exchange channel through the first diversion ports, and the multiple first diversion ports are arranged at intervals along the circumferential direction of the heat exchange channel.

[0007] Optionally, the liquid inlet assembly includes a liquid inlet rotating shaft and a first diverter plate. The liquid inlet rotating shaft has a liquid inlet channel, and the first diverter plate has a liquid inlet diverter channel. The liquid inlet channel is connected to the liquid inlet diverter channel.

[0008] Optionally, the liquid inlet diversion channel includes multiple primary diversion channels and a diversion ring channel. The multiple primary diversion channels are arranged at intervals around the axis of the liquid inlet channel in the circumferential direction of the center. One end of each of the multiple primary diversion channels is connected to the liquid inlet channel. The diversion ring channel surrounds the multiple primary diversion channels and is connected to the end of the multiple primary diversion channels away from the center.

[0009] Optionally, the liquid inlet diversion channel further includes multiple secondary diversion channels, which are arranged at intervals along the circumferential direction of the diversion ring and are all connected to the diversion ring. The ends of the multiple secondary diversion channels away from the diversion ring are connected to the heat exchange channel.

[0010] Optionally, the heat exchange channel is provided with multiple partition bars for supporting the inner wall of the outer roller and the outer wall of the inner roller. The multiple partition bars are arranged at intervals along the circumferential direction to define multiple heat exchange channels. Each heat exchange channel is connected to a first branch port.

[0011] Optionally, the abrasive roller further includes a liquid outlet assembly located at the end of the outer roller body away from the liquid inlet assembly. The liquid outlet assembly has a liquid outlet diversion channel with multiple second diversion ports. The liquid outlet diversion channel is connected to the end of the heat exchange channel away from the liquid inlet diversion channel through the second diversion ports. The multiple second diversion ports are arranged at intervals along the circumferential direction of the heat exchange channel.

[0012] Optionally, the abrasive roller further includes an inlet connector and an outlet connector. The inlet connector is rotatably connected to the inlet assembly and communicates with the inlet diversion channel. The outlet connector is rotatably connected to the outlet assembly and communicates with the outlet diversion channel.

[0013] Optionally, the abrasive roller further includes an axial reciprocating drive assembly, the drive end of which is connected to the outer roller body and is used to drive the outer roller body to perform reciprocating linear motion along its axial direction.

[0014] Optionally, the axial reciprocating drive assembly includes a drive motor, a reducer, an eccentric shaft, and a transmission structure. The output end of the drive motor is connected to the reducer, the rotating shaft of the reducer is sleeved on the eccentric shaft, one end of the transmission structure is sleeved on the eccentric shaft, and the other end is connected to the outer roller body, so as to convert the eccentric rotational motion of the eccentric shaft into the axial linear reciprocating motion of the outer roller body.

[0015] Optionally, the abrasive roller further includes two sandpaper retaining rings connected to both ends of the outer roller body. One sandpaper retaining ring is used to fix the beginning of the sandpaper, and the other sandpaper retaining ring is used to fix the end of the sandpaper. The surface of the outer roller body is configured to allow the sandpaper to be spirally wound.

[0016] Secondly, embodiments of this application provide a leather polishing device, including the polishing roller as described in the first aspect.

[0017] Therefore, this embodiment of the application defines a heat exchange channel by using the inner wall of the outer roller and the outer wall of the inner roller at intervals. The width of this heat exchange channel in the radial direction is much smaller than the diameter of the heat exchange channel opened at the center of a conventional leather abrasive roller. This allows the heat exchange channel to be quickly filled when the heat exchange liquid enters the heat exchange channel at the same flow rate and volume. Furthermore, by simultaneously supplying liquid to the heat exchange channel through multiple first branch ports of the liquid inlet branch channel in the liquid inlet assembly, the heat exchange liquid is "segmented and filled" in the circumferential direction. The heat exchange liquid does not have time to be completely thrown to the bottom of the heat exchange channel by centrifugal force before it fills the entire heat exchange channel, thereby achieving full coverage heat exchange with the inner wall of the outer roller and improving the heat exchange effect. If the heat exchange liquid is a coolant, it can achieve full coverage cooling of the outer roller and improve the cooling effect. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of a leather abrasive roller provided in an embodiment of this application; Figure 2 A schematic cross-sectional view of a leather abrasive roller in the axial direction, provided for an embodiment of this application; Figure 3 A cross-sectional schematic diagram of a leather abrasive roller in the radial direction provided for an embodiment of this application; Figure 4 This is a schematic diagram of the structure of a leather grinding roller after concealing the axial reciprocating drive assembly and pulley, as provided in an embodiment of this application. Figure 5 This is a schematic diagram of the structure of an eccentric shaft and transmission structure in a leather abrasion roller provided in an embodiment of this application; Figure 6 for Figure 5 A cross-sectional schematic diagram of AA.

[0020] Explanation of reference numerals in the attached figures: 1. Outer roller body; 2. Inner roller body; 21. Heat exchange channel; 211. Heat exchange flow channel; 22. Separator bar; 3. Liquid inlet assembly; 31. Liquid inlet shaft; 311. Liquid inlet channel; 32. First diverter plate; 321. Primary diverter channel; 322. Secondary diverter channel; 323. Diverter ring channel; 4. Liquid outlet assembly; 5. Liquid inlet connector; 6. Liquid outlet connector; 7. Axial reciprocating drive assembly; 71. Drive motor; 72. Reducer; 73. Eccentric shaft; 74. Transmission structure; 8. Sandpaper retaining ring; 9. Pulley. Detailed Implementation

[0021] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0022] In the description of this application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or specifying the number of technical features indicated. Therefore, features defined with "first" and "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0023] Please see Figures 1 to 6 This application provides a leather abrasive roller, including an outer roller body 1, an inner roller body 2, and a liquid inlet assembly 3. The inner roller body 2 is coaxially disposed inside the outer roller body 1 and spaced apart from the outer roller body 1 in its radial direction to define a heat exchange channel 21. The width of the heat exchange channel 21 in the radial direction is much smaller than the diameter of the cylindrical heat exchange channel 21 opened in the axial direction of a conventional leather abrasive roller, which is beneficial for cooling water to quickly fill the heat exchange channel 21 in this embodiment. Exemplarily, the radial width of the heat exchange channel 21 is 1 mm to 20 mm, preferably 2 mm to 10 mm, where the radial width refers to the vertical distance between the inner wall of the outer roller body 1 and the outer wall of the inner roller body 2. The liquid inlet assembly 3 is disposed at one end of the outer roller body 1 and has a liquid inlet diversion channel with multiple first diversion ports. The liquid inlet diversion channel is connected to the heat exchange channel 21 through the first diversion ports, and the multiple first diversion ports are arranged at intervals along the circumferential direction of the heat exchange channel 21.

[0024] The technical solution provided in this application defines a heat exchange channel 21 by using the inner wall of the outer roller body 1 and the outer wall of the inner roller body 2 spaced apart. The radial width of this heat exchange channel 21 is much smaller than the diameter of the heat exchange channel 21 opened at the center of a conventional leather abrasive roller. This allows the heat exchange channel 21 to be quickly filled when the heat exchange liquid enters the heat exchange channel 21 at the same flow rate and volume. Furthermore, by simultaneously supplying liquid to the heat exchange channel 21 through multiple first diversion ports in the liquid inlet assembly 3, the heat exchange liquid is "segmented and filled" in the circumferential direction. The heat exchange liquid does not have time to be completely thrown to the bottom of the heat exchange channel 21 by centrifugal force before it covers the entire heat exchange channel 21, thereby achieving full coverage heat exchange with the inner wall of the outer roller body 1 and improving the heat exchange effect. If the heat exchange liquid is a coolant, it can achieve full coverage cooling of the outer roller body 1, improving the cooling effect.

[0025] It should be noted that the heat exchange channel 21 in this application can serve as either a cooling channel (for introducing coolant) or a heating channel (for introducing a higher-temperature liquid), without limitation. However, in this embodiment, since the working condition involves polishing leather with a grinding roller, generating heat through friction, the requirement is generally only for cooling, not heating. Therefore, in this working condition, a coolant is used for heat exchange. In subsequent embodiments, where the leather is being polished, a coolant is also used for heat exchange.

[0026] Since the technical solution of this application involves fluid mechanics and other related fields, in order to make the solution principle of this application easier to understand, the heat exchange structure of the traditional leather grinding roller and the heat exchange structure provided in this embodiment will be described and compared separately below: Traditional heat exchange structures: The traditional heat exchange channel 21 is a single axial through-hole, where the liquid attempts to "lie flat" only under gravity. Once the roller rotates, centrifugal force immediately throws the liquid towards the lower half of the inner wall of the roller, forming only a crescent-shaped liquid band. This liquid band forms a stable free surface with the air, its circumferential position uniquely determined by force balance. Since no external momentum source can alter this balance, the free surface becomes a topological invariant of the system—regardless of the flow rate, the upper half remains a cavity. This cavity halves the effective heat exchange area, and the liquid layer thickness varies drastically with the circumferential position. Combined with the axial force of the coolant and the circumferential rotation of the roller, this leads to uneven local thermal resistance distribution of the coolant, affecting heat dissipation.

[0027] In this embodiment, the heat exchange channel 21 has a liquid inlet assembly 3 introduced at the end of the roller body. This assembly has multiple jet holes arranged circumferentially. The circumferential component of the jet outlet velocity is opposite to the direction of the roller wall velocity, creating a "reverse shear layer." This shear layer carries the liquid across the centrifugal barrier, forcibly pushing the liquid phase to the upper half of the circumference. After the multiple jets superimpose circumferentially, the entire annular cross-section is occupied by a continuous liquid phase; the original "crescent-shaped liquid band and cavity" topology is forcibly rewritten as a "360° liquid ring." Therefore, compared to traditional heat exchange structures, the heat exchange channel 21 in this embodiment has a more uniform and larger heat exchange area, and the axial pressure drop is reduced due to full utilization of the cross-section, which is beneficial for improving the balance and stability of the roller rotation.

[0028] In some embodiments, see Figures 1 to 3 The liquid inlet assembly 3 includes a liquid inlet rotating shaft 31 and a first diverter plate 32. The liquid inlet rotating shaft 31 has a liquid inlet channel 311, and the first diverter plate 32 has a liquid inlet diversion channel. The liquid inlet channel 311 is connected to the liquid inlet diversion channel.

[0029] Specifically, to ensure that the coolant can uniformly enter the heat exchange channel 21 circumferentially under high-speed rotation conditions, this embodiment provides a liquid inlet assembly 3 at the liquid inlet end of the grinding roller. This liquid inlet assembly 3 is assembled from two parts: a liquid inlet shaft 31 and a first diverter plate 32. The liquid inlet shaft 31 has an axial liquid inlet channel 311 along its central axis for introducing external coolant into the roller body. The first diverter plate 32 is coaxially fitted onto the end of the liquid inlet shaft 31, and has a liquid inlet diverter channel machined inside. The coolant first passes through the liquid inlet channel 311 and then radially enters the liquid inlet diverter channel, achieving the first flow direction conversion. Multiple first diverter ports are opened on the end face of the first diverter plate 32 facing the heat exchange channel 21, and these first diverter ports are arranged at equal angles along the circumferential direction of the heat exchange channel 21. After leaving the first diverter ports, the liquid directly enters the heat exchange channel 21, forming a multi-point synchronous liquid supply circumferentially, fundamentally suppressing the phenomenon of "lower half-circumference aggregation and upper half-circumference cavity" caused by centrifugal force. The liquid inlet shaft 31 and the first distribution plate 32 adopt a static seal or a rotary dynamic seal structure, or the liquid inlet shaft 31 and the first distribution plate 32 are integrally formed and sealed to ensure that when the grinding roller rotates at high speed, the external coolant can still continuously and leak-free flow into the liquid inlet distribution channel inside the first distribution plate 32 through the liquid inlet channel 311.

[0030] Further, please see Figures 1 to 3The liquid inlet diversion channel includes multiple primary diversion channels 321, multiple secondary diversion channels 322, and a diversion ring channel 323. The multiple primary diversion channels 321 are arranged at intervals along the circumferential direction of the center of the liquid inlet channel 311, and the ends of the multiple primary diversion channels 321 away from the secondary diversion channels 322 are all connected to the liquid inlet channel 311. The diversion ring channel 323 surrounds the multiple primary diversion channels 321 and is connected to the ends of the multiple primary diversion channels 321 away from the center. The multiple secondary diversion channels 322 are arranged at intervals along the circumferential direction of the diversion ring channel 323 and are all connected to the diversion ring channel 323. The ends of the multiple secondary diversion channels 322 away from the diversion ring channel 323 are connected to the heat exchange channel 21.

[0031] For example, to ensure that the coolant enters the heat exchange channel 21 at multiple points, with equal flow rates and uniform circumferential distribution while the grinding roller rotates at high speed, this embodiment provides a graded expansion-type inlet distribution channel inside the first distribution plate 32. This inlet distribution channel consists of three hierarchical flow channels: multiple primary distribution channels 321, a distribution ring channel 323, and multiple secondary distribution channels 322. These three hierarchical flow channels are connected in series to complete the complete distribution process of "axial inflow, uniform circumferential distribution, and multi-point circumferential outflow." The primary distribution channels 321 extend radially outwards from the central axis of the inlet channel 311, and multiple primary distribution channels 321 are arranged at equal angular intervals along the circumferential direction of this central axis. The beginning of all primary distribution channels 321 is directly connected to the inlet channel 311, ensuring that the coolant flowing in from the inlet shaft 31 is first uniformly divided into several independent streams. The ends of the primary distribution channels 321 converge into the distribution ring channel 323. The diversion ring 323 is a continuously closed annular cavity around the central axis. Its inner diameter is slightly larger than the envelope circle at the ends of the multiple primary diversion channels 321, and its outer diameter is slightly smaller than the outer edge of the first diversion plate 32. The function of the diversion ring 323 is to rapidly mix the tributaries from each primary diversion channel 321 in the circumferential direction and re-establish a uniform pressure field, eliminating the circumferential non-uniformity caused by slight differences in upstream flow.

[0032] In short, by simultaneously supplying coolant through multiple primary distribution channels 321 of the liquid inlet assembly 3, the coolant forms a multi-point jet in the circumferential direction, which counteracts the influence of centrifugal force and makes the coolant evenly cover the inner wall of the entire heat exchange channel 21, avoiding the liquid surface deviation phenomenon in the traditional structure.

[0033] Multiple secondary distribution channels 322 are formed on the outer ring wall of the distribution ring channel 323. These secondary distribution channels 322 are also arranged at equal angular intervals along the circumferential direction of the distribution ring channel 323. The first end of the secondary distribution channel 322 is connected to the distribution ring channel 323, and the end forms the aforementioned first distribution port, directly facing the heat exchange channel 21. The number and orientation of the secondary distribution channels 322 correspond one-to-one with the circumferential partitions of the heat exchange channel 21. After passing through the distribution ring channel 323, the coolant is further precisely subdivided and enters the heat exchange channel 21 with the same momentum, the same flow rate, and the same circumferential phase. This allows the coolant to complete the process of equal division, pressure equalization, and re-equalization within a very short axial distance. This ensures that the flow rate of each first distribution port is consistent and avoids circumferential flow deviation caused by rotational centrifugal force. Ultimately, it achieves instantaneous full liquid phase filling of the heat exchange channel 21 within a 360° circumferential range, which is significantly better than the problems of local cavities and uneven heat exchange caused by the traditional single-hole direct injection method.

[0034] To verify the effectiveness of this application, a comparative test was conducted using a traditional leather grinding roller and this application. Under the same rotational speed and coolant flow rate, for example, the rotational speed was set to 1000 rpm and the flow rate was set to 50 L / min. The surface temperature uniformity of the outer roller body of this application was improved by 40%, and the maximum temperature was reduced by 15°C.

[0035] Specifically, multiple partition strips 22 are equidistantly arranged circumferentially within the annular heat exchange channel 21 formed between the outer roller body 1 and the inner roller body 2. The partition strips 22 are simultaneously welded to or integrally formed on the inner wall of the outer roller body 1 and the outer wall of the inner roller body 2, serving both a "double-wall support" function in the radial direction and dividing the originally single annular gap into several independent heat exchange channels 211 in the circumferential direction. The cross-section of each heat exchange channel 211 is a narrow fan shape, and its circumferential width is determined by the spacing between two adjacent partition strips 22. When the leather grinding roller rotates at high speed, the outer roller body 1 experiences a radial expansion tendency due to centrifugal force and grinding reaction force. The partition strips 22, acting as "truss-like stiffeners," firmly connect the outer roller body 1 and the inner roller body 2 into a whole, significantly improving the radial stiffness and critical speed of the roller body, and preventing the outer roller body 1 from becoming unstable and deformed due to wall thickness reduction. Correspondingly, by setting the partition strips 22, it is beneficial to reduce the thickness of the outer roller body 1, while increasing mechanical strength without decreasing it, and also achieving the goal of reducing the overall weight of the leather grinding roller.

[0036] Furthermore, the number of partition strips 22 is equal to the number of first branch ports and their circumferential phase is consistent, meaning that each heat exchange channel 211 is directly connected to a first branch port at its inlet end. After the coolant flows out from the first branch port, it immediately enters the corresponding heat exchange channel 211, forming a "one-to-one" independent flow unit, avoiding circumferential crossflow and flow segregation. The narrow fan-shaped cross-section of each heat exchange channel 211 further thins the liquid layer, reduces the Reynolds number, promotes the growth of the turbulent boundary layer attached to the wall, and enhances the heat transfer coefficient a second time. At the same time, the sidewalls of the partition strips 22 provide a slight guiding effect on the liquid flow, suppressing secondary vortices caused by rotation and making the axial velocity distribution more uniform.

[0037] In some embodiments, the abrasive roller further includes an outlet component 4 disposed at one end of the outer roller body 1 away from the inlet component 3. The outlet component 4 has an outlet diversion channel with a plurality of second diversion ports. The outlet diversion channel is connected to one end of the heat exchange channel 21 away from the inlet diversion channel through the second diversion ports. The plurality of second diversion ports are arranged at intervals along the circumferential direction of the heat exchange channel 21.

[0038] Specifically, an outlet component 4 is provided at the axial end of the grinding roller away from the inlet component 3. The outlet component 4 is coaxially fixed to the outer roller body 1 and can rotate synchronously with the outer roller body 1. An outlet diversion channel is opened inside the outlet component 4 to uniformly discharge the coolant that has completed heat exchange from the heat exchange channel 21. The structure of the outlet diversion channel is mirror-symmetrical to the inlet diversion channel: multiple second diversion ports are opened on the end face or peripheral wall of the outlet component 4. Each second diversion port is arranged at equal angular intervals along the circumferential direction of the heat exchange channel 21, and the number and circumferential phase are consistent with the first diversion port, ensuring that each heat exchange channel 211 has an independent and corresponding second diversion port directly connected to it at the outlet end. After the coolant enters each heat exchange channel 211 from the first diversion port, it flows axially through the entire sandwich heat exchange channel 21, absorbing the grinding heat transmitted from the outer roller body 1. After reaching the outlet end, each branch of the liquid flow merges into the outlet diversion channel through the corresponding second diversion port, and is finally discharged from the grinding roller. This closed-loop path ensures a parallel heat exchange mode of "multiple inlets and multiple outlets," avoiding flow short-circuiting or stagnation caused by traditional single-end centralized liquid return.

[0039] In some embodiments, see Figures 1 to 3 The abrasive roller also includes an inlet connector 5 and an outlet connector 6. The inlet connector 5 is rotatably connected to the inlet assembly 3 and communicates with the inlet diversion channel. The outlet connector 6 is rotatably connected to the outlet assembly 4 and communicates with the outlet diversion channel.

[0040] Specifically, to ensure the external cooling system remains stationary while the abrasive roller rotates at high speed, this embodiment provides rotatably connected inlet connectors 5 and 6 at the outer ends of the inlet assembly 3 and the outlet assembly 4, respectively. When the outer roller body 1 and the inner roller body 2 rotate, causing the inlet assembly 3 and the outlet assembly 4 to rotate, the inlet connectors 5 and 6 are rotatably connected to the inlet assembly 3 and the outlet assembly 4, respectively. This ensures that the inlet connectors 5 and 6 are not affected by the rotation of the inlet assembly 3 and the outlet assembly 4, and remain stationary. This effectively prevents the external cooling system from rotating with the abrasive roller and also prevents the pipes used to connect the inlet connectors 5 and 6 from becoming entangled.

[0041] The inlet connector 5 has an axial through hole inside. One end of the through hole is connected to the external coolant supply pipe, and the other end is coaxially connected to the inlet channel 311 of the inlet shaft 31. The outlet connector 6 is arranged in mirror image of the inlet connector 5.

[0042] In some embodiments, see Figure 4 The abrasive roller also includes an axial reciprocating drive assembly 7, the drive end of which is connected to the outer roller body 1 and is used to drive the outer roller body 1 to perform reciprocating linear motion along its axial direction.

[0043] The fixed part of the axial reciprocating drive assembly 7 is mounted on the frame (not shown in the figure), and its drive end is directly or indirectly connected to the outer roller body 1 of the sanding roller. It is used to drive the outer roller body 1 to reciprocate linearly along its own axis while the sanding roller rotates at high speed. This movement causes the sandpaper on the surface of the outer roller body 1 to slide axially back and forth while rotating and sanding, which significantly reduces the correspondence between the "sanding texture" and the grooves on the leather surface and improves the uniformity of the sanding surface.

[0044] Further, please see Figures 4 to 6 The axial reciprocating drive assembly 7 consists of a drive motor 71, a reducer 72, an eccentric shaft 73, and a transmission structure 74 connected in series. Specifically, the output end of the drive motor 71 is connected to the reducer 72, the rotating shaft of the reducer 72 is fitted with the eccentric shaft 73, one end of the transmission structure 74 is fitted with the eccentric shaft 73, and the other end is connected to the outer roller body 1. The drive motor 71 outputs rotational motion, which is reduced in speed and increased in torque by the reducer 72. The eccentric shaft 73 mounted on the rotating shaft converts the eccentric rotational motion into axial linear reciprocating motion. The transmission structure 74 then transmits this reciprocating motion to the outer roller body 1, causing it to perform periodic linear reciprocating motion along the axial direction. The entire assembly is installed on the outside of the frame and is only connected to the end face of the outer roller body 1 through the transmission structure 74, without affecting the inflow and outflow of coolant.

[0045] The reciprocating stroke is uniquely determined by the eccentricity of the eccentric shaft 73, and can be steplessly adjusted from 3mm to 15mm by replacing the eccentric shaft 73 with different eccentricities. The reciprocating frequency is determined by the speed of the drive motor 71 and the speed ratio of the reducer 72, and can be continuously adjusted within the range of 0 to 300 seconds. Users can set the stroke and frequency online according to the leather type, sandpaper grit, and process requirements to achieve process flexibility. In this embodiment, the single-sided stroke of the reciprocating stroke is 3cm, and the total stroke of one reciprocating stroke is 6cm. The outer roller 1 and the inner roller 2 are rigidly connected by the separator 22, and the reciprocating drive only acts on the end face of the outer roller 1, without disrupting the static balance of the inner roller 2.

[0046] The axial reciprocating drive assembly 7 causes the sandpaper to rotate and polish while simultaneously undergoing axial micro-slippage, resulting in cross-shaped cutting marks from the sandpaper, which effectively eliminates unidirectional scratches and improves the smoothness of the leather surface. At the same time, the reciprocating motion causes additional axial pulsation in the coolant within the heat exchange channel 21, further enhancing the turbulence intensity and improving heat exchange efficiency.

[0047] It should be noted that the structural connections and fits between the drive motor 71, reducer 72, eccentric shaft 73, and transmission structure 74 all require a series of connecting components, such as bolts and bearings. Since these are standard parts and commonly used connecting components in the field, they will not be described in detail here; those skilled in the art can select and use them according to the actual situation. Furthermore, the reducer 72 and drive motor 71 are existing products that can be directly purchased and assembled; their structures will not be described in detail here.

[0048] In some embodiments, see Figure 1 The abrasive roller also includes two sandpaper retaining rings 8, which are connected to both ends of the outer roller body 1. One of the sandpaper retaining rings 8 is used to fix the beginning end of the sandpaper, and the other sandpaper retaining ring 8 is used to fix the end end of the sandpaper. The surface of the outer roller body 1 is configured to allow the sandpaper to be spirally wound.

[0049] Two sandpaper retaining rings 8 are coaxially installed at both ends of the outer roller body 1. Each retaining ring is detachably fixed to the end flange of the outer roller body 1 by bolts, clips, or a quick-locking structure. The sandpaper retaining ring 8 near the liquid inlet assembly 3 is defined as the "starting end retaining ring" and is used to hold the beginning end (starting end) of the sandpaper; the sandpaper retaining ring 8 near the liquid outlet assembly 4 is defined as the "ending end retaining ring" and is used to hold the end end (ending end) of the sandpaper. The clamping surface is embedded with elastic pressure strips or serrated bites to keep the sandpaper from loosening or slipping under high-speed rotation and axial reciprocating conditions.

[0050] In some embodiments, the cylindrical outer surface of the outer roller 1 is finely ground to a surface roughness Ra≤0.8 μm, and fine spiral guide grooves are machined along the axial direction. Sandpaper is tightly wound spirally around this outer surface, with the first end embedded in the slot of the first end fixing ring, and then wound around the spiral guide grooves turn by turn until the last end is locked by the last end fixing ring. The spiral winding creates a slight overlap between adjacent turns, ensuring full coverage while avoiding stepped seams.

[0051] Both sandpaper retaining rings 8 are equipped with eccentric cams or elbow clamping mechanisms, which can complete the tightening and loosening of sandpaper within 30 seconds. When changing sandpaper, simply loosen the tail retaining ring, pull out the old sandpaper, insert the beginning of the new sandpaper into the beginning retaining ring and pre-tighten it, then continue winding while rotating the outer roller 1, and finally lock the tail retaining ring. The elastic pressure strip inside the retaining ring automatically compensates for tension changes caused by the thermal expansion and contraction of the sandpaper, ensuring that the entire sandpaper maintains a constant tension throughout the entire working cycle.

[0052] In some embodiments, see Figure 1 The leather abrasive roller also includes a pulley 9. The pulley 9 is located at the end of the outer roller body 1 away from the reciprocating drive assembly and is fixedly sleeved on the liquid outlet shaft of the liquid outlet assembly 4. The pulley 9 can be connected to the motor through a transmission belt, thereby transmitting the rotation of the motor to the pulley 9, which in turn drives the leather abrasive roller to rotate.

[0053] Embodiments of this application also provide a leather polishing apparatus, including the polishing roller described in any of the foregoing embodiments. The beneficial effects of this leather polishing apparatus and the specific structure of the polishing roller have been described in detail in the foregoing embodiments concerning the polishing roller, and therefore will not be repeated here.

[0054] The basic concepts have been described above. Obviously, for those skilled in the art, the detailed disclosure above is merely illustrative and does not constitute a limitation of this application. Although not explicitly stated herein, those skilled in the art may make various modifications, improvements, and corrections to this application. Such modifications, improvements, and corrections are suggested in this application, and therefore remain within the spirit and scope of the exemplary embodiments of this application.

[0055] Furthermore, this application uses specific terms to describe embodiments of the application. For example, "an embodiment," "one embodiment," and / or "some embodiments" refer to a particular feature, structure, or characteristic associated with at least one embodiment of the application. Therefore, it should be emphasized and noted that "an embodiment," "one embodiment," or "an alternative embodiment" mentioned twice or more in different locations in this specification do not necessarily refer to the same embodiment. In addition, certain features, structures, or characteristics in one or more embodiments of the application can be appropriately combined.

[0056] Similarly, it should be noted that, in order to simplify the description of the present application and thus aid in the understanding of one or more embodiments, the foregoing description of the embodiments of the present application sometimes combines multiple features into a single embodiment, drawing, or description thereof. However, this disclosure method does not imply that the subject matter of the present application requires more features than those mentioned in the claims. In fact, the embodiments contain fewer features than all the features of the single embodiments disclosed above.

[0057] For each patent, patent application, patent application publication, and other material such as articles, books, specifications, publications, and documents referenced in this application, the entire contents of that patent application are incorporated herein by reference, except for historical application documents that are inconsistent with or conflict with the content of this application, and documents that limit the broadest scope of the claims of this application (currently or subsequently appended to this application). It should be noted that if there are any inconsistencies or conflicts between the descriptions, definitions, and / or terminology used in the supplementary materials of this application and the content of this application, the descriptions, definitions, and / or terminology used in this application shall prevail.

[0058] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A leather abrasive roller, characterized in that, include: outer roller body; The inner roller body is coaxially disposed within the outer roller body and spaced apart from the outer roller body in the radial direction of the outer roller body, thereby defining a heat exchange channel; The liquid inlet assembly is located at one end of the outer roller body and has a liquid inlet diversion channel with multiple first diversion ports. The liquid inlet diversion channel is connected to the heat exchange channel through the first diversion ports, and the multiple first diversion ports are arranged at intervals along the circumferential direction of the heat exchange channel.

2. The abrasive roller according to claim 1, characterized in that, The liquid inlet assembly includes a liquid inlet rotating shaft and a first diverter plate. The liquid inlet rotating shaft has a liquid inlet channel, and the first diverter plate has a liquid inlet diversion channel. The liquid inlet channel is connected to the liquid inlet diversion channel.

3. The abrasive roller according to claim 2, characterized in that, The liquid inlet diversion channel includes multiple primary diversion channels and a diversion ring channel. The multiple primary diversion channels are arranged at intervals around the axis of the liquid inlet channel in the circumferential direction of the center, and one end of each of the multiple primary diversion channels is connected to the liquid inlet channel. The diversion ring channel surrounds the multiple primary diversion channels and is connected to the end of the multiple primary diversion channels away from the center.

4. The abrasive roller according to claim 3, characterized in that, The liquid inlet diversion channel also includes multiple secondary diversion channels. These secondary diversion channels are arranged at intervals along the circumferential direction of the diversion ring channel and are all connected to the diversion ring channel. The ends of the multiple secondary diversion channels away from the diversion ring channel are connected to the heat exchange channel.

5. The abrasive roller according to any one of claims 1 to 4, characterized in that, The heat exchange channel is provided with multiple partition bars for supporting the inner wall of the outer roller and the outer wall of the inner roller. The multiple partition bars are arranged at intervals along the circumferential direction to define multiple heat exchange channels. Each heat exchange channel is connected to a first branch port.

6. The abrasive roller according to claim 1, characterized in that, The abrasive roller also includes a liquid outlet assembly located at the end of the outer roller body away from the liquid inlet assembly. The liquid outlet assembly has a liquid outlet diversion channel with multiple second diversion ports. The liquid outlet diversion channel is connected to the end of the heat exchange channel away from the liquid inlet diversion channel through the second diversion ports. The multiple second diversion ports are arranged at intervals along the circumferential direction of the heat exchange channel.

7. The abrasive roller according to claim 6, characterized in that, The abrasive roller also includes an inlet connector and an outlet connector. The inlet connector is rotatably connected to the inlet assembly and communicates with the inlet diversion channel. The outlet connector is rotatably connected to the outlet assembly and communicates with the outlet diversion channel.

8. The abrasive roller according to claim 1, characterized in that, The abrasive roller also includes an axial reciprocating drive assembly, the drive end of which is connected to the outer roller body and is used to drive the outer roller body to perform reciprocating linear motion along its axial direction.

9. The abrasive roller according to claim 8, characterized in that, The axial reciprocating drive assembly includes a drive motor, a reducer, an eccentric shaft, and a transmission structure. The output end of the drive motor is connected to the reducer. The rotating shaft of the reducer is sleeved on the eccentric shaft. One end of the transmission structure is sleeved on the eccentric shaft, and the other end is connected to the outer roller body to convert the eccentric rotational motion of the eccentric shaft into the axial linear reciprocating motion of the outer roller body.

10. The abrasive roller according to claim 1, characterized in that, The abrasive roller also includes two sandpaper retaining rings, which are connected to both ends of the outer roller body. One of the sandpaper retaining rings is used to fix the beginning of the sandpaper, and the other sandpaper retaining ring is used to fix the end of the sandpaper. The surface of the outer roller body is configured to allow the sandpaper to be spirally wound.

11. A leather polishing device, characterized in that, Includes the leather abrasive roller as described in any one of claims 1 to 10.

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