Anti-collision device for clamping cylinder
By designing a combination of connecting sleeve, roller bearing, constraint assembly and oil cup on the clamping cylinder, rolling friction is replaced by sliding friction, which solves the stress damage problem of the clamping cylinder top and ensures the stable operation of the rolling mill.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SINOSTEEL XIAN MACHINERY
- Filing Date
- 2025-06-12
- Publication Date
- 2026-05-29
AI Technical Summary
The clamping cylinder's mandrel is subjected to continuous radial stress damage during the rolling process, leading to deformation or fracture and affecting the stable operation of the rolling mill.
The design employs a combination of a semi-enclosed connecting sleeve, roller bearing, constraint assembly, sleeve, and oil cup. By replacing sliding friction with rolling friction, and combined with the use of grease, frictional wear and heat accumulation are reduced, ensuring stable contact between the roller bearing and the bearing housing.
It effectively reduces the radial stress impact of the clamping cylinder, extends the service life of the mandrel, ensures the stable rolling process of the rolling mill, and reduces friction, wear, and heat accumulation.
Smart Images
Figure CN224294287U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of machining technology, and in particular to an anti-collision device for a clamping cylinder. Background Technology
[0002] Strip mills are core equipment in metal sheet production. Their primary task is to roll billets in multiple passes to process them into sheets and strips that meet the required thickness, width, and surface quality requirements. Common four-high and six-high mills mainly consist of work rolls, intermediate rolls, support rolls, and mill stand assemblies.
[0003] The clamping cylinder presses against the side of the support roll bearing seat with the top of the piston rod end. On the one hand, it can prevent the support roll from moving axially during the rolling process. On the other hand, it can lock the bearing seat when changing rolls to avoid accidental displacement of the bearing seat. At the same time, it works with the pressing system to accurately set the initial roll gap and transfer the impact load during the rolling process to the stand.
[0004] However, when the rolling force causes a slight displacement of the support roll, the bearing seats mounted at both ends of the support roll will also experience slight axial displacement. This causes the mounting seats to continuously press against the clamping cylinder on both sides away from the support roll, resulting in continuous radial stress damage to the mandrel end face of the clamping cylinder. After prolonged operation, this may even lead to deformation or breakage of the clamping cylinder mandrel, making it impossible for the rolling mill to perform stable rolling operations.
[0005] Therefore, there is an urgent need for an anti-collision device for clamping cylinders to solve the above problems. Utility Model Content
[0006] This application provides an anti-collision device for a clamping cylinder, which aims to reduce stress damage to the working end of the clamping cylinder, thereby ensuring stable rolling operations of the rolling mill.
[0007] To achieve the above objectives, this application provides the following technical solutions:
[0008] An anti-collision device for a clamping cylinder, characterized in that it includes a connecting sleeve, a connecting shaft, a roller bearing, multiple constraint components, a sleeve, and an oil cup;
[0009] One end of the connecting sleeve, which has a semi-enclosed structure, is fixedly connected to the output end of the cylinder. The open area of the connecting sleeve faces the end face of the bearing seat and can move closer to or away from the bearing seat.
[0010] The connecting shaft passes through the open area of the connecting sleeve and is fixedly connected to the periphery of the connecting sleeve;
[0011] The roller bearing is rotatably disposed on the periphery of the connecting shaft, and a portion of the circumferential surface of the roller bearing abuts against the end face of the bearing housing;
[0012] Multiple constraint components are arranged between the roller bearing and the connecting sleeve to limit the axial relative position of the roller bearing and the connecting sleeve;
[0013] The sleeve is fixedly installed inside the connecting shaft, and one end of the sleeve is connected to the connection between the connecting shaft and the roller bearing, while the other end extends outward from the connecting shaft.
[0014] The oil cup is fixedly installed at the end of the sleeve away from the connecting shaft and communicates with the lumen of the sleeve.
[0015] Furthermore, the connecting sleeve is generally in the form of a C-shaped or U-shaped groove. The outer side of the groove bottom of the connecting sleeve is fixedly connected to the output end of the cylinder. The groove opening of the connecting sleeve faces the bearing seat. The groove width direction of the connecting sleeve is perpendicular to the axial direction of the output end of the cylinder and parallel to the axial direction of the roller bearing.
[0016] Furthermore, the constraint assembly includes a telescopic rod, a spring post, and ball bearings;
[0017] One end of the telescopic rod is fixedly connected to the inner walls of both sides of the groove of the connecting sleeve, and the other end abuts against the end face of the roller bearing.
[0018] The spring post is disposed inside the telescopic rod, and the circumferential surface of the spring post abuts against the inner wall of the telescopic rod;
[0019] The ball bearing is tumbling at one end of the telescopic rod near the ball bearing, and a portion of the circumferential surface of the ball bearing abuts against the axial end face of the ball bearing.
[0020] Furthermore, the telescopic rod includes multiple sections, which are connected end to end to form an interference fit. A mounting block is fixedly provided at the end of each section adjacent to the roller bearing. The mounting block has a recessed mounting groove on the end face near the ball bearing, and the groove wall slides with the circumferential surface of the ball.
[0021] Furthermore, a buffer pad is fixedly provided at the groove of the connecting sleeve. The thickness of the buffer pad is the same as the thickness of the groove wall of the connecting sleeve, and the end face of the buffer pad away from the groove of the connecting sleeve is flush with the axial end face of the roller bearing.
[0022] One or more technical solutions provided in the embodiments of this utility model have at least the following technical effects or advantages:
[0023] This application utilizes roller bearings to convert sliding friction into rolling friction, reducing the direct impact of radial stress on the mandrel end face and preventing deformation or breakage of the cylinder output end (mandrel). Multiple constraint components are circumferentially arranged between the roller bearing and the connecting sleeve, ensuring stable contact between the roller bearing and the bearing housing end face through axial limiting, avoiding asymmetric stress caused by axial misalignment, and extending the mandrel's lifespan. Simultaneously, grease is injected into the sleeve through an oil cup, and the grease is delivered to the rolling contact surface to form continuous lubrication, reducing friction, wear, and heat accumulation. Attached Figure Description
[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments of this utility model or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0025] Figure 1 This is a structural schematic diagram of the assembled state provided in the embodiments of this application;
[0026] Figure 2 for Figure 1 A magnified view of a portion of region A in the middle.
[0027] Icons: 1-Bearing housing; 2-Cylinder block; 10-Connecting sleeve; 11-Connecting shaft; 12-Roller bearing; 13-Sleeve; 14-Oil cup; 16-Buffer pad; 20-Constraint assembly; 21-Telescopic rod; 221-Section rod; 22-Spring column; 23-Ball; 24-Mounting block. Detailed Implementation
[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some, not all, of the embodiments of the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model.
[0029] In the description of the embodiments of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing the embodiments of this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. The terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In addition, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this utility model can be understood according to the specific circumstances.
[0030] like Figures 1-2 As shown, a clamping cylinder anti-collision device includes a connecting sleeve 10, a connecting shaft 11, a roller bearing 12, multiple constraint components 20, a sleeve 13, and an oil cup 14. One end of the connecting sleeve 10, which has a semi-enclosed structure, is fixedly connected to the output end of the cylinder body 2. The open area of the connecting sleeve 10 faces the end face of the bearing seat 1, allowing it to move closer to or away from the bearing seat 1. The connecting shaft 11 passes through the open area of the connecting sleeve 10 and is fixedly connected to the periphery of the connecting sleeve 10. The roller bearing 12 is rotatably disposed on the periphery of the connecting shaft 11. A portion of the circumferential surface abuts against the end face of the bearing housing 1; a plurality of the constraint components 20 are circumferentially disposed between the roller bearing 12 and the connecting sleeve 10 to limit the axial relative position of the roller bearing 12 and the connecting sleeve 10; the sleeve 13 is fixedly disposed inside the connecting shaft 11, and one end of the sleeve 13 is connected to the connection between the connecting shaft 11 and the roller bearing 12, and the other end extends outward from the connecting shaft 11; the oil cup 14 is fixedly disposed at the end of the sleeve 13 away from the connecting shaft 11 and is connected to the cavity of the sleeve 13.
[0031] In the above scheme, when the bearing housing 1 approaches the clamping cylinder due to slight axial displacement, the roller bearing 12 converts sliding friction into rolling friction through rolling contact, reducing the direct impact of radial stress on the end face of the mandrel and preventing deformation or breakage of the output end (mandrel) of the cylinder 2. Multiple constraint components 20 are arranged circumferentially between the roller bearing 12 and the connecting sleeve 10. Through axial limiting, it ensures that the roller bearing 12 always maintains stable contact with the end face of the bearing housing 1, avoiding asymmetrical stress distribution caused by axial displacement and extending the service life of the mandrel. Grease is injected into the sleeve 13 through the oil cup 14. The grease is delivered to the rolling contact surface of the roller bearing 12 through the sleeve 13, forming continuous lubrication, reducing wear and heat accumulation, thereby ensuring the structural integrity of the roller bearing 12.
[0032] The connecting sleeve 10 has an overall C-shaped or U-shaped groove structure. The outer side of the groove bottom of the connecting sleeve 10 is fixedly connected to the output end of the cylinder 2. The groove opening of the connecting sleeve 10 faces the bearing seat 1. The groove width direction of the connecting sleeve 10 is perpendicular to the axial direction of the output end of the cylinder 2 and parallel to the axial direction of the roller bearing 12.
[0033] In the above scheme, the outer side of the groove bottom of the connecting sleeve 10 is fixedly connected to the output end of the cylinder body 2, forming a stable support foundation. The groove opening faces the bearing seat 1, and the open area allows the roller bearing 12 to directly contact the end face of the bearing seat 1, while providing space for the axial micro-displacement of the bearing seat 1. The groove width direction of the connecting sleeve 10 is perpendicular to the axis of the output end of the cylinder body 2, ensuring that the connecting sleeve 10 has sufficient rigidity in the axial direction (i.e., the direction of rolling force) to avoid structural deformation due to force in the groove width direction. The groove width direction of the connecting sleeve 10 is parallel to the axis of the roller bearing 12, ensuring that the roller bearing 12 can rotate freely in the groove, and its axis direction is consistent with the movement direction of the bearing seat 1, achieving the stability of rolling contact.
[0034] The constraint assembly 20 includes a telescopic rod 21, a spring post 22, and a ball bearing 23. One end of the telescopic rod 21 is fixedly connected to the inner walls of both sides of the groove of the connecting sleeve 10, and the other end abuts against the end face of the roller bearing 12. The spring post 22 is disposed inside the telescopic rod 21, and the circumferential surface of the spring post 22 abuts against the inner wall of the telescopic rod 21. The ball bearing 23 is rotatably disposed on the end of the telescopic rod 21 near the ball bearing 23, and a portion of the circumferential surface of the ball bearing 23 abuts against the axial end face of the ball bearing 23.
[0035] In the above scheme, one end of the telescopic rod 21 is fixed to the inner walls of both sides of the groove of the connecting sleeve 10, and the other end abuts against the end face of the roller bearing 12, forming axial support. The telescopic rod 21 can extend and retract according to the slight axial displacement of the roller bearing 12, adapting to the axial movement of the bearing seat 1 during the rolling process and avoiding rigid collisions. The spring column 22 is set inside the telescopic rod 21, and its circumferential surface abuts against the inner wall of the telescopic rod 21, providing axial elastic support force. When the roller bearing 12 is subjected to axial impact, the spring column 22 absorbs energy through compression deformation, reducing the rigid impact on the connecting sleeve 10 and the roller bearing 12. The ball 23 can roll freely with the slight axial displacement of the roller bearing 12, reducing frictional resistance, while ensuring stable contact between the telescopic rod 21 and the roller bearing 12.
[0036] The telescopic rod 21 includes multiple sections 221, which are connected end to end to form an interference fit. A mounting block 24 is fixedly provided at the end of each section 221 adjacent to the roller bearing 12. The mounting block 24 has a recessed mounting groove on the end face near the ball bearing 23, and the groove wall slides in fit with the circumferential surface of the ball 23.
[0037] In the above scheme, multiple sections 221 are interference-fitted end to end, causing the sections 221 to undergo slight elastic deformation when subjected to axial force, thereby achieving the telescopic function while ensuring the overall rigidity and stability of the telescopic rod 21. The mounting block 24 is fixedly installed at the end of the telescopic rod 21 near the roller bearing 12, providing a stable mounting base for the balls 23. The groove wall of the mounting groove slides against the circumferential surface of the balls 23, allowing the balls 23 to roll freely within the groove while limiting their axial and radial offset, ensuring stable contact with the end face of the roller bearing 12.
[0038] A buffer pad 16 is fixedly provided at the groove of the connecting sleeve 10. The thickness of the buffer pad 16 is the same as the thickness of the groove wall of the connecting sleeve 10, and the end face of the buffer pad 16 away from the groove of the connecting sleeve 10 is flush with the axial end face of the roller bearing 12.
[0039] In the above scheme, the buffer pad 16 is fixed at the groove of the connecting sleeve 10. When the roller bearing 12 is subjected to axial impact, the buffer pad 16 absorbs the impact energy through the compression deformation of its elastic material (such as rubber, polyurethane, etc.), reducing rigid damage to the roller bearing 12 and the connecting sleeve 10. Furthermore, the thickness of the buffer pad 16 is consistent with the thickness of the groove wall of the connecting sleeve 10, avoiding stress concentration or structural deformation caused by thickness differences. The end face of the buffer pad 16 away from the groove is flush with the axial end face of the roller bearing 12, forming a direct contact surface, ensuring that the axial impact force is preferentially transmitted to the buffer pad 16, thereby reducing rigid damage to the roller bearing 12 and the connecting sleeve 10.
[0040] The various embodiments in this specification are described in a progressive manner. For the same or similar parts between the various embodiments, please refer to each other. Each embodiment focuses on describing the differences from other embodiments.
[0041] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit this application. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of this application.
Claims
1. A collision avoidance device for a clamping cylinder, characterized in that, It includes a connecting sleeve (10), a connecting shaft (11), a roller bearing (12), multiple constraint components (20), a sleeve (13), and an oil cup (14); One end of the connecting sleeve (10), which has a semi-enclosed structure, is fixedly connected to the output end of the cylinder (2). The open area of the connecting sleeve (10) faces the end face of the bearing seat (1) and can move closer to or away from the bearing seat (1). The connecting shaft (11) passes through the open area of the connecting sleeve (10) and is fixedly connected to the periphery of the connecting sleeve (10); The roller bearing (12) is rotatably disposed on the periphery of the connecting shaft (11), and a portion of the peripheral surface of the roller bearing (12) abuts against the end face of the bearing seat (1); Multiple constraint components (20) are arranged between the roller bearing (12) and the connecting sleeve (10) to limit the axial relative position of the roller bearing (12) and the connecting sleeve (10); The sleeve (13) is fixedly disposed inside the connecting shaft (11), and one end of the sleeve (13) is connected to the connection between the connecting shaft (11) and the roller bearing (12), and the other end extends to the outside of the connecting shaft (11). The oil cup (14) is fixedly disposed at one end of the sleeve (13) away from the connecting shaft (11) and communicates with the lumen of the sleeve (13).
2. The anti-collision device for clamping cylinders according to claim 1, characterized in that, The connecting sleeve (10) is in the form of a C-shaped or U-shaped groove. The outer side of the groove bottom of the connecting sleeve (10) is fixedly connected to the output end of the cylinder (2). The groove opening of the connecting sleeve (10) faces the side of the bearing seat (1). The groove width direction of the connecting sleeve (10) is perpendicular to the axial direction of the output end of the cylinder (2) and parallel to the axial direction of the roller bearing (12).
3. The anti-collision device for clamping cylinders according to claim 1, characterized in that, The constraint assembly (20) includes a telescopic rod (21), a spring post (22), and a ball bearing (23); One end of the telescopic rod (21) is fixedly connected to the inner walls of both sides of the groove of the connecting sleeve (10), and the other end abuts against the end face of the roller bearing (12); The spring post (22) is disposed inside the telescopic rod (21), and the circumferential surface of the spring post (22) abuts against the inner wall of the telescopic rod (21); The ball (23) is tumbling on one end of the telescopic rod (21) near the ball (23) bearing, and a portion of the circumferential surface of the ball (23) abuts against the end face of the ball (23) bearing in the axial direction.
4. The anti-collision device for clamping cylinders according to claim 3, characterized in that, The telescopic rod (21) includes multiple sections (221), which are connected end to end to form an interference fit. A mounting block (24) is fixedly provided at the end of the section (221) adjacent to the roller bearing (12). The mounting block (24) has a mounting groove recessed on the end face near the ball bearing (23), and the groove wall of the mounting groove slides in fit with the circumferential surface of the ball (23).
5. The anti-collision device for clamping cylinders according to claim 1, characterized in that, A buffer pad (16) is fixedly provided at the groove of the connecting sleeve (10). The thickness of the buffer pad (16) is the same as the thickness of the groove wall of the connecting sleeve (10), and the end face of the buffer pad (16) away from the groove of the connecting sleeve (10) is flush with the axial end face of the roller bearing (12).