Cross type bidirectional locking bearing seat for carding machine

Abstract

The crossed bidirectional locking bearing seat comprises a vertical block and a transverse block which are perpendicularly fixed to each other, a protruding step is arranged on the front face of the vertical block and divides the front face into a high step face and a low step face, and the high step face and the low step face are in transition through a connecting face; a groove is formed in the right side of the transverse block, and the left side groove wall of the groove is in an arc shape. A top curved surface clamping groove is defined by the groove and the low-step surface; a bearing mounting hole is formed in the vertical block, the lower portion of the front face of the vertical block is sunken to form a right-angle groove, and the bottom face of the transverse block and the upper wall face of the right-angle groove are coplanar. The bottom face of the transverse block and the right-angle groove jointly define a bottom right-angle clamping groove. Through a vertical cross structure of the vertical block and the transverse block, bidirectional rigid support of the bearing seat is realized; the torsion stress of the special-shaped bearing end cover can be dispersed through the top curved-surface clamping groove and the bottom right-angle clamping groove, accurate locking of the bearing seat and the T-shaped guide rail is achieved, and the stability and the anti-movement capacity of the bearing under high-speed vibration of the carding machine can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of bearing seat, and particularly relates to a cross type bidirectional locking bearing seat for a carding machine. BACKGROUND

[0002] In the high-speed operation process of the carding machine, the bearing seat as a core component for supporting the shafting directly affects the stability and reliability of the equipment. The existing bearing seat of the carding machine generally has the following problems:

[0003] 1. The traditional bearing seat is mostly fixed through a single plane or a bolt, and lacks a multidirectional constraint structure. For example, when the bottom surface bolt is connected to the rack, the bearing seat is prone to displacement under the action of transverse vibration, especially in the high-speed rotating parts such as the doffer and the cylinder, and the single fixing mode is difficult to resist the torsional moment transmitted by the shafting, so that a gap is easily generated between the bearing end cover and the rack, and finally the precision of fiber carding is affected.

[0004] 2. The shafting vibration frequency of the carding machine is high (usually up to 500-1500 rpm) during operation, and the rigid support structure of the traditional bearing seat lacks stress dispersion design. When the right-angle slot is directly fixed, the vibration load is concentrated at the bolt connection, which is prone to cause bolt loosening or fracture, and at the same time, the rigid contact between the bearing outer ring and the mounting hole will aggravate the wear and shorten the service life of the bearing.

[0005] 3. The slot structure of the existing bearing seat is mostly single plane or right angle design, and it is difficult to adapt to the curved profile of the special-shaped bearing end cover. For example, when the bearing end cover with a circular arc transition is used in part of the carding machine, the traditional right-angle slot cannot provide effective anti-torsion support, which causes the end cover to deflect in vibration, thereby causing fiber winding and even equipment shutdown. SUMMARY

[0006] The present application aims to overcome the deficiencies in the prior art and provide a cross type bidirectional locking bearing seat for a carding machine.

[0007] The application provides a cross type bidirectional locking bearing seat for a carding machine, which is characterized by comprising a vertical block and a horizontal block which are fixed perpendicularly, the horizontal block is arranged on the front surface of the vertical block on the left side, and the right side surface of the horizontal block and the right side surface of the vertical block form a gap; a raised step is further arranged on the left side of the front surface of the vertical block, so that the front surface is divided into a high step surface and a low step surface, and the high step surface and the low step surface are connected through a vertical connecting surface; a semi-open groove is arranged on the right side of the top surface of the horizontal block, the left side groove wall of the groove is arranged in an arc shape and is coplanar with the connecting surface; the groove and the low step surface jointly form a top curved surface clamping groove, and the top curved surface clamping groove is used for locking a special-shaped end cover of a carding machine doffer or cylinder bearing; the curved surface structure of the top curved surface clamping groove is formed by the natural transition of the arc side wall of the groove and the low step surface, the curved surface structure can provide torsional stress support, so that the bearing seat can adapt to the high-speed vibration of the carding machine shaft system; a bearing mounting hole is arranged on the vertical block, the bearing mounting hole penetrates the vertical block in the front-rear direction, and the bearing mounting hole is arranged above the horizontal block; the lower part of the front surface of the vertical block is recessed to form a semi-open right-angle groove, the bottom surface of the horizontal block is coplanar with the upper wall surface of the right-angle groove; the bottom surface of the horizontal block and the right-angle groove jointly form a bottom right-angle clamping groove, and the bottom right-angle clamping groove is used for cooperating with a T-shaped guide rail of the carding machine frame; through the perpendicular cross structure of the vertical block and the horizontal block, bidirectional rigid support of the bearing seat is realized; through the top curved surface clamping groove and the bottom right-angle clamping groove, the torsional stress of the special-shaped bearing end cover can be dispersed, and the precise locking of the bearing seat and the T-shaped guide rail is realized, which is helpful to improve the stability and anti-jamming capability of the bearing under the high-speed vibration of the carding machine.

[0008] Further, the horizontal block is provided with a countersunk hole one and a countersunk hole two, the countersunk hole one and the countersunk hole two are arranged in the left-right direction, and part of the countersunk hole two is located in the groove; wherein, the countersunk hole one is used as a main load-bearing anchor point, the bearing seat is locked to the carding machine frame through a bolt, can bear the equipment gravity and vertical vibration load, so as to avoid the shear stress concentration of the bolt; the countersunk hole two is used as an anti-torsion anchor point, is used for locking the special-shaped end cover, and after the bolt is screwed in, the bolt head is flush with the bottom surface of the groove, so that the bearing seat and the special-shaped end cover are matched with zero clearance, so as to eliminate the fretting wear under high-speed vibration.

[0009] Further, the axis of the countersunk hole two is tangent to the arc side wall of the groove; part of the countersunk hole two is sunk into the groove to form an anti-torsion locking point, after the bolt is screwed in, the bolt head is flush with the bottom surface of the groove, can transmit the locking force along the normal direction of the curved surface, so as to resist the torsional moment of the special-shaped end cover, and avoid the interference between the special-shaped end cover and the fiber winding.

[0010] Further, the center distance L of the countersunk hole one and the countersunk hole two satisfies: L≥1.5×d; wherein, d is the width of the horizontal block; through the constraint of the center distance, an effective force couple arm can be formed, so as to convert the vibration torque into a reverse balance torque, so as to restrain the angular displacement of the horizontal block under the high-frequency vibration of the carding machine, and avoid the failure of the bolt due to stress concentration.

[0011] Further, the top surface of the vertical block is provided with a communication hole communicating with the bearing mounting hole; the communication hole can form a negative pressure environment through an external air flow pipeline, thereby absorbing the flying fibers and preventing the fibers from winding around the bearing.

[0012] Further, the orifice of the communication hole is provided with a detachable sealing cover; when necessary, the sealing cover is detached and replaced with an oil injection nozzle, the communication hole can be used as a lubrication channel to allow lubricating oil to pass in, and oil injection to the bearing can reduce the high-speed friction temperature rise.

[0013] Further, a through hole is arranged in the right-angle groove, the through hole is used for inserting a positioning pin, which can prevent the bearing seat from axially moving and solve the problem of bolt loosening caused by continuous impact of the carding machine while achieving the positioning cooperation between the bearing seat and the rack.

[0014] Further, the bottom surface of the vertical block is provided with a first screw hole; the first screw hole is used for mounting a locking bolt, so that the locking bolt penetrates through the base plate of the carding machine rack, and the advantage of large contact area of the bottom surface can effectively absorb the vertical impact load generated by high-speed vibration of the carding machine.

[0015] Further, the back surface of the vertical block is provided with a second screw hole; the second screw hole is used for connecting a vibration sensor through a bolt to monitor the radial runout of the bearing in real time; or, the second screw hole is used for mounting an L-shaped anti-vibration rib plate through a bolt, thereby resisting the axial bending moment caused by fiber winding.

[0016] Further, the inner wall of the bearing mounting hole is provided with a ring-shaped boss, the depth of the ring-shaped boss near the high-order surface side is H1, and the depth of the ring-shaped boss near the low-order surface side is H2, H1>H2, forming an asymmetric anti-vibration shoulder; the deep side wall surface of the ring-shaped boss is used for interference fit with the outer ring of the bearing, and the shallow side wall surface is used for clearance fit with the outer ring of the bearing, which can induce the bearing to deflect to the low-order surface side under the high-speed working condition of the carding machine, thereby offsetting the axial movement force.

[0017] The application provides a cross type bidirectional locking bearing seat for a carding machine, which comprises a vertical block and a transverse block which are fixed perpendicularly, a convex step is arranged on the front left side of the vertical block, the front is divided into a high step surface and a low step surface, and the high step surface and the low step surface are connected through a vertical connecting surface; a semi-open groove is arranged on the top right side of the transverse block, the left groove wall of the groove is arranged in an arc shape and is coplanar with the connecting surface; the groove and the low step surface jointly enclose a top curved surface clamping groove; a bearing mounting hole is arranged on the vertical block, the front lower part of the vertical block is recessed to form a semi-open right-angle groove, the bottom surface of the transverse block is coplanar with the upper wall surface of the right-angle groove; and the bottom surface of the transverse block and the right-angle groove jointly enclose a bottom right-angle clamping groove. Through the perpendicular cross structure of the vertical block and the transverse block, bidirectional rigid support of the bearing seat is realized; through the top curved surface clamping groove and the bottom right-angle clamping groove, the torsional stress of a special-shaped bearing end cover can be dispersed, and accurate locking of the bearing seat and the T-shaped guide rail is realized, which is helpful to improve the stability and anti-channeling capacity of the bearing of the carding machine under high-speed vibration. The cross type bidirectional locking bearing seat for the carding machine provided by the application realizes the synergistic effect of "bidirectional support + curved surface anti-torsion + accurate locking", solves the core problems of single positioning and poor vibration resistance of the existing bearing seat, can reduce the failure rate of the bearing of the carding machine during high-speed operation (such as 1500 rpm of the cylinder shaft), prolong the maintenance cycle, and improve the reliability and production efficiency of the equipment. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 FIG. 1 is a structural schematic view of a cross type bidirectional locking bearing seat for a carding machine provided by the application;

[0019] Figure 2 FIG. 2 is a structural schematic view of the cross type bidirectional locking bearing seat for the carding machine shown in FIG. 1 from another angle; Figure 1

[0020] Figure 3 FIG. 3 is a structural schematic view of the cross type bidirectional locking bearing seat for the carding machine from another angle; Figure 1

[0021] Figure 4 FIG. 4 is a structural schematic view of the cross type bidirectional locking bearing seat for the carding machine from another angle. Figure 1 DETAILED DESCRIPTION

[0022] In order to make the above-mentioned purposes, features and advantages of the application more obvious and easy to understand, the specific embodiments of the application will be described in detail below in combination with the drawings. In the following description, a large number of specific details are set forth in order to facilitate a full understanding of the application. However, the application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the application, so the application is not limited by the specific embodiments disclosed below.

[0023] ​​​The application provides a cross type bidirectional locking bearing seat for a carding machine, which is characterized by comprising a vertical block 1 and a horizontal block 2 which are fixed perpendicularly, the horizontal block 2 is arranged on the front surface A of the vertical block 1 on the left side, and the right side surface of the horizontal block 2 is spaced apart from the right side surface B of the vertical block 1; a raised step is further arranged on the left side of the front surface A of the vertical block 1, the front surface A is divided into a high step surface 11 and a low step surface 12, and the high step surface 11 and the low step surface 12 are transitioned through a vertical connecting surface 13; a semi-open groove 21 is arranged on the top surface C of the horizontal block 2 on the right side, the left side groove wall of the groove 21 is arranged in an arc shape and is coplanar with the connecting surface 13; the groove 21 and the low step surface 12 jointly enclose a top curved surface clamping groove, and the top curved surface clamping groove is used for locking a special-shaped end cover of a carding machine doffer or cylinder bearing; the curved surface structure of the top curved surface clamping groove is formed by the natural transition of the arc side wall of the groove 21 and the low step surface 12, the curved surface structure can provide torsional stress support, so that the bearing seat can adapt to the high-speed vibration of the carding machine shaft system; a bearing mounting hole 14 is arranged on the vertical block 1, the bearing mounting hole 14 penetrates the vertical block 1 in the front-rear direction, and the bearing mounting hole 14 is arranged above the horizontal block 2; the bottom of the front surface A of the vertical block 1 is recessed to form a semi-open right-angle groove 3, and the bottom surface D of the horizontal block 2 is coplanar with the upper wall surface E of the right-angle groove 3; the bottom surface of the horizontal block 2 and the right-angle groove 3 jointly enclose a bottom right-angle clamping groove, and the bottom right-angle clamping groove is used for cooperating with a T-shaped guide rail of a carding machine rack.

[0024] Through the vertical intersection structure of the vertical block 1 and the horizontal block 2, bidirectional rigid support of the bearing seat is realized; through the top curved surface clamping groove and the bottom right-angle clamping groove, the torsional stress of the special-shaped bearing end cover can be dispersed, and the accurate locking position of the bearing seat and the T-shaped guide rail is realized, which is helpful to improve the stability and anti-channeling ability of the bearing under the high-speed vibration of the carding machine.

[0025] For details, refer to Figures 1 to 4 In the illustrated embodiment, the bearing seat is composed of the vertical block 1 and the horizontal block 2 which are fixed perpendicularly, forming a T-shaped bidirectional support framework. The horizontal block 2 is arranged on the front surface A of the vertical block 1 on the left side, and the right side surface of the horizontal block 2 is spaced apart from the right side surface B of the vertical block 1, forming a stepped difference structure, so as to avoid other parts (such as a transmission belt) of the carding machine, and then facilitate the correct connection of the bearing seat and the carding machine rack.

[0026] For details, refer to Figure 1 A raised step is arranged on the left side of the front surface A of the vertical block 1, the raised step extends in the up-down direction, and the front surface A is divided into a high step surface 11 and a low step surface 12, the high step surface 11 and the low step surface 12 are transitioned through a connecting surface 13, and an L-shaped mounting platform is formed.

[0027] For details, refer to Figure 1 and Figure 2, the top surface C of the transverse block 2 is provided with a semi-open groove 21 on the right side, the left side groove wall of the groove 21 is provided in an arc shape and is coplanar with the connecting surface 13, and the groove 21 and the low-order surface 12 form a top curved surface clamping groove.

[0028] The curved surface structure of the top curved surface clamping groove is formed by the natural transition of the arc wall and the low-order surface 12, and can closely fit the special-shaped end cover curve of the doffer / tin liner bearing.

[0029] Continuing to refer to Figure 1 and Figure 2 , the lower part of the vertical block 1 is recessed to form a right-angle groove 3. In combination with reference to Figure 3 , the bottom surface D of the transverse block 2 is coplanar with the upper wall surface E of the right-angle groove 3, and together forms a bottom right-angle clamping groove. The bottom right-angle clamping groove can cooperate with the T-shaped guide rail of the carding machine frame.

[0030] Continuing to refer to Figure 1 , the bearing mounting hole 14 penetrates the vertical block 1 in the front-rear direction and is located above the transverse block 2. The bearing mounting hole 14 is used to install a rotating component such as a deep groove ball bearing.

[0031] The cross-type bidirectional locking bearing seat for a carding machine provided in the application can disperse the vertical load and the transverse vibration load generated during bearing operation to two directions through the vertical block 1 and the transverse block 2 arranged vertically and crossly, compared with the traditional single plane support, which is helpful to improve the overall rigidity, thereby effectively inhibiting the shaking of the bearing seat under high-speed vibration. At the same time, the curved surface structure of the top curved surface clamping groove can perfectly fit the special-shaped end cover of the doffer / tin liner bearing, the arc side wall can provide anti-torsional stress support along the normal direction of the curved surface, convert the torsional moment borne by the end cover into pressure stress of the curved surface contact, thereby avoiding the end cover deflection problem caused by stress concentration in the traditional right-angle clamping groove; and the zero-clearance fit can eliminate the fretting wear between parts under high-speed vibration, so that the relative displacement amount of the end cover and the bearing seat is reduced, thereby ensuring the operation stability and use precision. In addition, the bottom right-angle clamping groove can form a three-dimensional locking structure of “upper and lower clamping + front and rear positioning” with the T-shaped guide rail of the frame (the vertical wall surface of the bottom right-angle clamping groove limits the front and rear movement of the bearing seat, the horizontal wall surface bears the support force transmitted by the frame, cooperates with the positioning pin in the clamping groove, and can realize the precise alignment of the bearing seat and the frame); this design changes the traditional single bolt fixation “line contact” into “surface contact + pin positioning”, not only improves the installation efficiency, but also controls the axial displacement amount within 0.02 mm, significantly enhances the stability of the bearing seat under the continuous impact working condition of the carding machine.

[0032] In summary, the cross-type bidirectional locking bearing seat for a carding machine provided by the application solves the core problems of single positioning and poor anti-vibration performance of the existing bearing seat through the synergistic effect of "bidirectional support + curved anti-torsion + precise locking", can reduce the failure rate of the bearing of the carding machine during high-speed operation (such as a cylinder shaft at 1500 rpm), and prolongs the maintenance cycle and improves the reliability and production efficiency of the equipment.

[0033] Further, the transverse block 2 is provided with a counterbore hole one 2a and a counterbore hole two 2b, the counterbore hole one 2a and the counterbore hole two 2b are arranged in the left-right direction, and part of the counterbore hole two 2b is located in the groove 21.

[0034] The counterbore hole one 2a is used as a main load-bearing anchoring point, and the bearing seat is locked to the carding machine rack through a bolt, which can bear the equipment gravity and vertical vibration load, thereby avoiding the shear stress concentration of the bolt.

[0035] The counterbore hole two 2b is used as an anti-torsion anchoring point, and is used to lock the special-shaped end cover. After the bolt is inserted, the bolt head is flush with the bottom surface of the groove 21, so that the bearing seat and the special-shaped end cover are in zero-clearance fit, thereby eliminating the fretting wear under high-speed vibration.

[0036] For details, please refer to Figure 2 In the illustrated embodiment, the counterbore hole one 2a is arranged on the left and connected to the carding machine rack through an M12 bolt. When the bolt is inserted and locked, the bolt head is sunk into the hole, and its axis is perpendicular to the bottom surface D of the transverse block. The counterbore hole one 2a is used as a main load-bearing anchoring point, mainly bears the equipment gravity and vertical vibration load, and can avoid the shear stress concentration problem existing in the traditional single-bolt connection, thereby improving the stress dispersion efficiency.

[0037] Continuing to refer to Figure 2 The counterbore hole two 2b is arranged on the right and partially embedded in the groove 21, and is also connected to the carding machine rack through an M12 bolt. The counterbore hole two 2b is used as an anti-torsion anchoring point, and after the bolt is inserted, the bolt head is flush with the bottom surface of the groove, so that the locking force of the bolt is transmitted along the curved normal direction, and the special-shaped end cover is forced to tightly fit the curved surface of the bearing seat, thereby eliminating the assembly gap and avoiding the fretting wear between the two when vibrating.

[0038] The double-counterbore hole load sharing design enables the bearing seat to simultaneously bear vertical load and torsional load, which helps to avoid overload failure of a single bolt.

[0039] Optionally, the axis of the counterbore hole two 2b is tangent to the circular arc side wall of the groove 21; the counterbore hole two 2b is partially sunk into the groove 21 to form an anti-torsion locking point, and after the bolt is inserted, the bolt head is flush with the bottom surface of the groove 21, which can transmit the locking force along the curved normal direction, thereby resisting the torsional moment of the special-shaped end cover, while avoiding the interference between the special-shaped end cover and the fiber.

[0040] The axis of the counterbore hole two 2b is tangent to the circular arc side wall of the groove 21, so that the locking force direction of the bolt is perpendicular to the tangent direction of the circular arc surface. The direction is consistent with the opposite direction of the special-shaped end cover torque, which can directly offset the torsion trend and form a high-efficiency anti-torsion structure of "force against force". At the same time, the tangential layout makes the bolt head seamlessly connect with the circular arc side wall after embedding in the groove, avoiding protruding outside the curved surface, which can prevent fiber from winding around the bolt head to form interference during the operation of the carding machine, and ensure that the anti-torsion function and the equipment cleanliness are compatible.

[0041] Optionally, the center distance L of the counterbore hole one 2a and the counterbore hole two 2b satisfies: L≥1.5×d; wherein d is the width of the transverse block 2; by constraining the center distance, an effective force couple arm can be formed to convert the vibration torque into a counterbalanced torque, thereby inhibiting the angular displacement of the transverse block 2 under high-frequency vibration of the carding machine and avoiding the failure of the bolt due to stress concentration.

[0042] Figures 1 to 4 In the embodiment shown, the front-rear direction (the direction of the front face A pointing to the back face F) is the width direction of the transverse block 2.

[0043] In a specific embodiment, d=80mm, L=120mm. At this time, the center distance of the two bolts is large enough to form a long force couple arm. When the carding machine vibrates to generate a torque (such as clockwise), the bolts of the counterbore hole one 2a and the counterbore hole two 2b bear upward and downward shearing forces respectively, forming a counterclockwise balanced torque. The longer the force couple arm, the greater the balanced torque (M=F×L), which can effectively offset the vibration torque, thereby avoiding the fatigue fracture of the bolt caused by stress concentration, and further improving the stability of the bearing seat under high-frequency vibration.

[0044] Further, the top surface of the vertical block 1 is provided with a communication hole 4, and the communication hole 4 communicates with the bearing mounting hole 14; the communication hole 4 can form a negative pressure environment through an external air flow pipeline, thereby absorbing the flying fibers and preventing them from winding around the bearing.

[0045] Optionally, the orifice of the communication hole 4 is provided with a detachable sealing cover; when needed, the sealing cover is removed and replaced with an oil injection nozzle, and the communication hole 4 can be used as a lubrication channel to allow lubricating oil to pass in, and oil injection to the bearing can reduce the high-speed friction temperature rise.

[0046] Figures 1 to 4 In the embodiment shown, the top surface of the vertical block 1 is provided with a communication hole 4, and the upper end of the communication hole 4 penetrates the top surface and the lower end communicates with the bearing mounting hole 14.

[0047] During normal operation, the communication hole 4 is connected to a negative pressure air source (such as a dust collection system provided by the carding machine) through an external hose, forming a negative pressure environment of-50Pa in the bearing mounting hole 14 to adsorb fiber debris and prevent it from invading the bearing raceway.

[0048] During maintenance, the sealing cover of the hole is removed and replaced by an oil injection nozzle, and lubricating oil (such as lithium-based grease) can be injected through the communication hole 4. The lubricating path is short and the bearing does not need to be disassembled, which can effectively improve the maintenance efficiency.

[0049] Optionally, the sealing cover is made of oil-resistant rubber or engineering plastic (such as nylon 66) and has elastic sealing performance.

[0050] The sealing cover can be detachably connected with the communication hole 4 through threaded connection, buckle connection or the like. The specific mounting mode of the sealing cover is not limited in the application, and convenient disassembly and assembly are sufficient.

[0051] A standard hose connector (such as a Φ6mm quick connector) is reserved on the sealing cover, which can be directly connected with a rubber hose of the negative pressure system of the carding machine.

[0052] During normal operation, the negative pressure system operates and removes the fiber debris near the bearing mounting hole 14. When oil needs to be injected, the hose is disconnected, the sealing cover is removed, the oil injection nozzle (with threaded or quick connector structure) is screwed or inserted into the communication hole 4, and the lubricating oil is injected into the communication hole 4 through the oil injection gun. The grease enters the bearing raceway through the bearing mounting hole 14, which can reduce the friction temperature rise. After the oil injection is completed, the oil injection nozzle is removed, the sealing cover is reinstalled and the hose is connected, and the negative pressure function is restored.

[0053] The detachable design of the two sealing covers takes into account the sealing performance and maintenance convenience. During negative pressure adsorption, the sealing cover cooperates with the hose to form an air flow channel; during oil injection, the function is converted by replacing the oil injection nozzle, without disassembling the bearing seat, so that the maintenance operation can be conveniently and quickly completed, which helps to improve the operation and maintenance efficiency of the carding machine.

[0054] Optionally, a through hole 5 is arranged in the right-angle groove 3, and the through hole 5 is used for inserting a positioning pin. While achieving the positioning cooperation between the bearing seat and the rack, the bearing seat can be prevented from axially moving, and the problem of bolt loosening caused by continuous impact of the carding machine can be solved.

[0055] For details, please refer to Figure 1 and Figure 4 In the illustrated embodiment, the through hole 5 with a hole diameter of 8mm is arranged on the groove wall of the right-angle groove 3 (which can also be regarded as the front surface A of the vertical block 1), and is used for positioning cooperation with the rack through the positioning pin.

[0056] During installation, the positioning pin is inserted into the through hole 5 and embedded into the positioning groove of the rack. Not only can the positioning pin achieve accurate positioning of the bearing seat in the front-rear direction, but also can bear part of the vibration impact force, reduce the shear force borne by the bolt, reduce the frequency of bolt loosening, and limit the axial movement. In addition, the positioning pin cooperates with the T-shaped guide rail of the bottom right-angle clamping groove to form a six-point positioning system of “two pins and one groove”, which can solve the problem of shaking caused by traditional single-bolt installation.

[0057] Further, the bottom surface of the vertical block 1 is provided with a first screw hole 6; the first screw hole 6 is used for installing a locking bolt, so that the locking bolt penetrates the base plate of the carding machine rack, and by taking advantage of the large bottom surface contact area, the vertical impact load generated by the high-speed vibration of the carding machine can be effectively absorbed.

[0058] Specifically, the specification of the first screw hole 6 is M10, which is used for installing a locking bolt. After the locking bolt penetrates the base plate of the rack, it can absorb the vertical impact, and compared with the traditional top bolt fixing, it can reduce the vibration transmission efficiency.

[0059] Further, the back surface F of the vertical block 1 is provided with a second screw hole 7; the second screw hole 7 is used for connecting a vibration sensor through a bolt, so as to monitor the radial runout of the bearing in real time; or, the second screw hole 7 is used for installing an L-shaped anti-vibration rib plate through a bolt, so as to resist the axial bending moment caused by fiber winding.

[0060] Specifically, the specification of the second screw hole 7 is M8, which can connect a vibration sensor to monitor the radial runout accuracy (±0.01mm) of the bearing in real time, or install an L-shaped anti-vibration rib plate to enhance the axial bending moment resistance of the bearing seat caused by fiber winding.

[0061] In an embodiment, the second screw hole 7 is used for connecting a vibration sensor through a bolt. The vibration sensor is preferably an acceleration vibration sensor, which can convert the mechanical vibration acceleration (reflecting the impact load of the bearing, such as foreign matter intrusion, raceway wear, etc.) and frequency (identifying abnormal frequencies such as bearing outer ring fault frequency and shaft misalignment frequency through frequency spectrum analysis) generated by the radial runout of the bearing into an electrical signal. When the vibration value exceeds the set threshold value, the main control system triggers an audible and light alarm to prompt shutdown for maintenance.

[0062] Through trend analysis, potential problems such as bearing wear and poor lubrication can be predicted, and compared with traditional manual inspection, abnormalities can be detected in advance.

[0063] The second screw hole 7 is arranged on the back surface F of the vertical block 1, close to the bearing mounting hole 14, and the sensor can directly sense the vibration of the bearing outer ring, avoiding signal attenuation caused by structural transmission. The bidirectional rigid support structure of the bearing seat can also reduce the interference of its own vibration on the sensor, ensuring the accuracy of the monitoring data.

[0064] In another embodiment, the second screw hole 7 is used to install an L-shaped anti-vibration rib plate by bolts. The L-shaped anti-vibration rib plate is composed of a horizontal plate and a vertical plate, which is bent at a right angle in the shape of "L". The horizontal plate is attached to the back surface F of the vertical block 1 and is fixed by bolts passing through the second screw hole 7. The vertical plate extends towards the card frame and can abut against the side plate of the frame or be secondarily fixed to the frame by bolts. The length of the horizontal plate is 100-150 mm, the height of the vertical plate is 80-100 mm, and the thickness of the plate is 3-5 mm. The material is Q235B or aluminum alloy. Only one L-shaped anti-vibration rib plate can be installed on one side of the back surface F of the vertical block, which is suitable for scenarios with small axial bending moments (such as the bearing of the licker-in roller). Two L-shaped anti-vibration rib plates can also be installed on the left and right sides of the back surface F of the vertical block to form a double-sided support for the bearing seat of high-load components such as doffer and cylinder.

[0065] During the operation of the carding machine, fibers may be wound around the bearing end cover or shaft, forming uneven loads, which generate axial bending moments perpendicular to the shaft centerline. Traditional bearing seats are only fixed by bolts, which cannot effectively resist such moments and may cause the bearing seat to tilt or the bolts to break.

[0066] The vertical plate of the L-shaped anti-vibration rib plate acts as a moment transmission arm, which can convert the axial bending moment into bending stress of the rib plate and disperse the load through the rigid inertia moment of the rib plate itself. The horizontal plate of the L-shaped anti-vibration rib plate forms a surface contact with the back surface F of the vertical block and is rigidly connected through the pre-tightening force of the bolts, which can reduce the local deformation of the back of the bearing seat. After the vertical plate is connected to the frame, a triangular support structure of "bearing seat-rib plate-frame" is formed, which can inhibit the axial swing of the bearing seat.

[0067] The L-shaped anti-vibration rib plate solves the problem of axial bending moment caused by fiber winding in carding machines through the principle of "right-angle support + moment dispersion", and has the functions of rigidity enhancement and vibration isolation. Its structure is simple and easy to install, and the installation method can be flexibly adjusted according to the actual load. It is a key auxiliary component to improve the overload capacity of the bearing seat, especially suitable for carding machines with high fiber output and prone to winding.

[0068] Optionally, the inner wall of the bearing mounting hole 14 is provided with a circumferential boss, the depth of the circumferential boss near the high-order surface 11 side is H1, the depth of the circumferential boss near the low-order surface 12 side is H2, H1>H2, forming an asymmetric anti-vibration shoulder; the deep side wall surface of the circumferential boss is used for interference fit with the outer ring of the bearing, and the shallow side wall surface is used for clearance fit with the outer ring of the bearing. Under high-speed working conditions of the carding machine, the bearing can be induced to deflect to the low-order surface 12 side, thereby offsetting the axial movement force.

[0069] In a specific embodiment, the inner wall of the bearing mounting hole 14 is provided with a circumferential boss, the depth H1=5mm near the high-order surface 11 side, and the depth H2=3mm near the low-order surface 12 side. The deep side wall surface is in interference fit with the bearing outer ring, with a fit tolerance H7 / s6, providing strong constraint; the shallow side wall surface is in clearance fit with the bearing outer ring, with a fit tolerance H7 / h6, allowing the bearing to deflect to the low-order surface side by an angle ≤0.2° when rotating at high speed, and using the elasticity of the bearing itself to offset 30%-40% of the axial displacement force.

[0070] The asymmetric design allows the bearing to automatically adjust the stress direction in vibration, thereby reducing the rigid impact of the outer ring on the bearing mounting hole, thereby prolonging the service life of the bearing.

[0071] The above embodiments only express several embodiments of the present application, and the description is more specific and detailed, but it cannot be understood as a limitation on the scope of the patent application. It should be noted that for ordinary skilled persons in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are all within the scope of protection of the present application. Therefore, the scope of protection of the patent of the present application should be subject to the appended claims.

Claims

1. A cross type bidirectional locking bearing block for a carding machine, characterized in that, The application relates to a bearing seat for a carding machine, which comprises mutually perpendicular fixed vertical blocks (1) and horizontal blocks (2), the horizontal blocks (2) are arranged on the front surface (A) of the vertical blocks (1) on the left side, and the right side surface of the horizontal blocks (2) is spaced apart from the right side surface (B) of the vertical blocks (1). The front surface (A) of the vertical blocks (1) is further provided with a convex step on the left side, so that the front surface (A) is divided into a high step surface (11) and a low step surface (12), and the high step surface (11) and the low step surface (12) are connected through a vertical connecting surface (13). The top surface (C) of the horizontal blocks (2) is provided with a semi-open groove (21) on the right side, the left groove wall of the groove (21) is arranged in an arc shape and is coplanar with the connecting surface (13). The groove (21) and the low step surface (12) jointly form a top curved clamping groove, and the top curved clamping groove is used for locking the special-shaped end cover of a carding machine doffer or cylinder bearing. The curved surface structure of the top curved clamping groove is formed by the natural transition of the arc side wall of the groove (21) and the low step surface (12), the curved surface structure can provide anti-torsional stress support, so that the bearing seat can adapt to the high-speed vibration of the carding machine shaft system. The vertical blocks (1) are provided with bearing mounting holes (14), the bearing mounting holes (14) penetrate the vertical blocks (1) in the front-rear direction, and the bearing mounting holes (14) are arranged above the horizontal blocks (2). The front surface (A) of the vertical blocks (1) is recessed on the lower part and forms a semi-open right-angle groove (3), the bottom surface (D) of the horizontal blocks (2) is coplanar with the upper wall surface (E) of the right-angle groove (3). The bottom surface of the horizontal blocks (2) and the right-angle groove (3) jointly form a bottom right-angle clamping groove, and the bottom right-angle clamping groove is used for cooperating with the T-shaped guide rail of the carding machine frame. Through the vertical intersection structure of the vertical blocks (1) and the horizontal blocks (2), bidirectional rigid support of the bearing seat is realized. Through the top curved clamping groove and the bottom right-angle clamping groove, the torsional stress of the special-shaped bearing end cover can be dispersed, the bearing seat and the T-shaped guide rail can be precisely locked, and the stability and anti-jamming capability of the bearing under the high-speed vibration of the carding machine can be improved.

2. The crosswise bidirectional locking bearing seat for a carding machine according to claim 1, characterized in that, The horizontal blocks (2) are provided with a countersunk hole one (2a) and a countersunk hole two (2b), the countersunk hole one (2a) and the countersunk hole two (2b) are arranged in the left-right direction and are spaced apart, and part of the countersunk hole two (2b) is located in the groove (21). The countersunk hole one (2a) is used as a main load-bearing anchoring point, the bearing seat is locked to the carding machine frame through bolts, can bear the equipment gravity and vertical vibration load, and thus the bolt shearing stress concentration is avoided. The countersunk hole two (2b) is used as an anti-torsional anchoring point and is used for locking the special-shaped end cover, after the bolt is screwed in, the bolt head is flush with the bottom surface of the groove (21), so that the bearing seat and the special-shaped end cover are in zero-clearance cooperation, and thus the fretting wear under the high-speed vibration is eliminated.

3. The crosswise bidirectional locking bearing seat for a carding machine according to claim 2, characterized in that, The axis of the countersunk hole two (2b) is tangent to the arc side wall of the groove (21). The counterbore hole two (2b) is partially sunk into the groove (21) to form a torsion locking point. After the bolt is inserted, the bolt head is flush with the bottom surface of the groove (21), which can transmit locking force along the normal direction of the curved surface to resist the torsional moment of the special-shaped end cover, while avoiding interference between the special-shaped end cover and the fiber winding.

4. The crosswise bidirectional locking bearing seat for a carding machine according to claim 2, characterized in that, The center distance L between the counterbore hole one (2a) and the counterbore hole two (2b) satisfies: L≥1.5×d; Wherein, d is the width of the transverse block (2); By constraining the center distance, an effective force couple arm can be formed to convert the vibration torque into a counterbalanced moment, thereby suppressing the angular displacement of the transverse block (2) under high-frequency vibration of the carding machine and avoiding failure of the bolt due to stress concentration.

5. The crosswise bidirectional locking bearing seat for a carding machine according to claim 1, characterized in that, The top surface of the vertical block (1) is provided with a communication hole (4) which communicates with the bearing mounting hole (14); The communication hole (4) can form a negative pressure environment through an external air flow pipeline to absorb flying fibers and prevent them from winding around the bearing.

6. The crosswise bidirectional locking bearing seat for a carding machine according to claim 5, characterized in that, The orifice of the communication hole (4) is provided with a detachable sealing cover; When needed, the sealing cover is removed and replaced with an oil injection nozzle. The communication hole (4) can serve as a lubrication channel to allow lubricating oil to pass in, and oil injection to the bearing can reduce the high-speed friction temperature rise.

7. The crosswise bidirectional locking bearing seat for a carding machine according to claim 1, characterized in that, The right-angle groove (3) is provided with a through hole (5) for inserting a positioning pin, which can prevent the bearing seat from moving axially and solve the problem of bolt loosening caused by continuous impact of the carding machine.

8. The crosswise bidirectional locking bearing seat for a carding machine according to claim 1, characterized in that, The bottom surface of the vertical block (1) is provided with a first screw hole (6); The first screw hole (6) is used to install a lock bolt, which penetrates the base plate of the carding machine rack, and has a large bottom surface contact area, which can effectively absorb the vertical impact load generated by high-speed vibration of the carding machine.

9. The crosswise bidirectional locking chasis bearing for a carding machine according to claim 1, characterized in that, The back surface (F) of the vertical block (1) is provided with a second screw hole (7); The second screw hole (7) is used to connect a vibration sensor through a bolt to monitor the radial runout of the bearing in real time. Alternatively, the second screw hole (7) is used to install an L-shaped anti-vibration rib plate through a bolt to resist the axial bending moment caused by fiber winding.

10. Crossed bidirectional locking bearing seat for a carding machine according to any one of claims 1-9, characterized in that, The inner wall of the bearing mounting hole (14) is provided with a ring-shaped boss, the depth of the ring-shaped boss near the high-order surface (11) side is H1, and the depth of the ring-shaped boss near the low-order surface (12) side is H2, H1>H2, forming an asymmetric anti-vibration shoulder; The deep side wall surface of the ring-shaped boss is used for interference fit with the outer ring of the bearing, and the shallow side wall surface is used for clearance fit with the outer ring of the bearing. Under high-speed working conditions of the carding machine, the bearing can be induced to deflect to the low-order surface (12) side, thereby offsetting the axial movement force.

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