Rolling mill shaft holding device

Abstract

The utility model provides a kind of rolling mill shaft holding device, including holding claw, axial drive mechanism and mounting mechanism, axial drive mechanism includes screw rod and worm gear assembly, mounting mechanism includes sleeve and sleeve, worm gear assembly is connected in one end of sleeve, sleeve is built in sleeve, holding claw is connected in the end of sleeve away from worm gear assembly, screw rod is built in sleeve, the head end of screw rod is connected in holding claw, worm gear assembly has internal thread, the thread end of screw rod and the internal thread between worm gear assembly are thread-connected to be movably arranged along self axial direction.Such as through worm gear assembly and the mutual cooperation of screw rod to realize the axial displacement function of holding claw, while the thread connection between worm gear assembly itself and screw rod forms double mechanical self-locking structure, to ensure better self-locking effect, improve the safety of equipment;And structure structure, only need to change and overhaul component when later maintenance, improve overhaul efficiency.

Description

Technical Field

[0001] This utility model relates to the field of slab continuous casting and rolling mill technology, and in particular to a mill shaft clamping device. Background Technology

[0002] The shaft clamp of the thin slab continuous casting and rolling mill is currently driven by a hydraulic cylinder: during roll changing, the shaft clamp closes, lifting the drive shaft and pulling out the old work roll; after the new work roll is pushed in, the shaft clamp opens. The shaft clamp is a non-rotating device, only used during roll changing. While the hydraulic control system can achieve automated control, its disadvantages are also obvious, such as less reliable safety than mechanical self-locking, complex troubleshooting, and high component costs. Although it is not frequently used, a malfunction during use, which is time-consuming and labor-intensive to handle, can interrupt production with very serious consequences. Therefore, excessively emphasizing the "advanced level of automation" for an infrequently used piece of equipment requires careful consideration.

[0003] Therefore, it is necessary to propose a mill shaft clamping device to solve or at least alleviate the above-mentioned defects. Utility Model Content

[0004] The main purpose of this utility model is to provide a rolling mill shaft clamping device to solve the problem that the existing shaft clamping devices lack mechanical self-locking capability, resulting in poor safety.

[0005] To achieve the above objectives, this utility model provides a rolling mill shaft clamping device, including clamping claws, an axial drive mechanism, and a mounting mechanism; wherein,

[0006] The axial drive mechanism includes a lead screw and a worm gear assembly, and the mounting mechanism includes a sleeve and a bushing; wherein...

[0007] The worm gear assembly is connected to one end of the sleeve, the sleeve is built into the sleeve, the clamp is connected to the end of the sleeve away from the worm gear assembly, the lead screw is built into the sleeve, the head end of the lead screw is connected to the clamp, the worm gear assembly has an internal thread, and the threaded end of the lead screw is threadedly connected to the internal thread of the worm gear assembly to be movable along its own axial direction.

[0008] Preferably, the worm gear assembly includes a nut housing, a worm gear, and a worm. The nut housing is connected to one end of the sleeve. The worm gear and the worm are rotatably housed within the nut housing. The worm gear has an internal thread. The threaded end of the lead screw passes through the worm gear to be threadedly connected to the internal thread of the worm gear. The external gear ring of the worm gear meshes with the gear ring of the worm.

[0009] Preferably, it further includes a guide key, wherein the side wall of the sleeve is provided with a guide groove extending axially, the sleeve is provided with a through hole, the guide key is connected to the sleeve, and one end of the guide key passes through the through hole and extends into the sleeve to be engaged in the guide groove.

[0010] Preferably, it also includes a positioning pin, wherein the head end of the lead screw has a positioning hole extending radially therefrom, and the gripper has a positioning channel corresponding to the positioning hole, and the positioning pin extends through the positioning channel and into the positioning hole to limit the axial displacement of the lead screw.

[0011] Preferably, the head end of the lead screw extends out of the gripper.

[0012] Preferably, the sleeve further includes two copper sleeves arranged opposite each other along the axial direction of the loop, the copper sleeves connecting the loop and the sleeve, and the two copper sleeves are respectively disposed at both ends of the sleeve.

[0013] Preferably, one end of the worm gear extends out of the nut housing.

[0014] Preferably, there are two guide grooves, each guide groove is provided with a guide key, and the two guide grooves are arranged opposite each other along the radial direction of the loop.

[0015] Preferably, the device further includes two mounting units arranged opposite each other along the axial direction of the worm. Each mounting unit includes a cover and a bearing. Both ends of the worm are rotatably inserted through the bearing. The cover is bolted to the nut housing to press against the outside of the bearing, and one end of the worm extends out of the cover.

[0016] Preferably, the nut housing and the sleeve are connected by a flange.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] This utility model provides a mill shaft clamping device, including a clamping jaw, an axial drive mechanism, and an installation mechanism. The axial drive mechanism includes a lead screw and a worm gear assembly. The installation mechanism includes a sleeve and a bushing. The worm gear assembly is connected to one end of the bushing, the sleeve is housed within the bushing, the clamping jaw is connected to the end of the sleeve away from the worm gear assembly, the lead screw is housed within the sleeve, and its head end is connected to the clamping jaw. The worm gear assembly has an internal thread, and the threaded end of the lead screw is threadedly connected to the internal thread of the worm gear assembly for axial movement. Thus, the axial displacement function of the clamping jaw is achieved through the mutual cooperation of the worm gear assembly and the lead screw. Simultaneously, the worm gear assembly itself and the threaded connection with the lead screw form a double mechanical self-locking structure, ensuring a good self-locking effect and improving equipment safety. Furthermore, subsequent maintenance only requires replacement and repair of the components, facilitating maintenance and improving maintenance efficiency. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0020] Figure 1 This is a three-dimensional schematic diagram of the overall structure in one embodiment of the present utility model;

[0021] Figure 2 This is a cross-sectional schematic diagram of the overall structure in one embodiment of the present invention;

[0022] Figure 3 for Figure 2 A cross-sectional view along the AA direction;

[0023] Figure 4 This is a perspective view of a worm gear assembly in one embodiment of the present invention;

[0024] Figure 5 This is a cross-sectional schematic diagram of a worm gear assembly in one embodiment of the present invention;

[0025] Figure 6 This is a three-dimensional schematic diagram of the loop in one embodiment of the present utility model;

[0026] Figure 7 This is a three-dimensional schematic diagram of the sleeve in one embodiment of the present invention.

[0027] The purpose, features, and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings.

[0028] Explanation of icon numbers:

[0029] 10. Claw gripper; 110. Locating pin; 120. Locating channel; 20. Axial drive mechanism; 210. Lead screw; 211. Head end; 212. Threaded end; 220. Worm gear assembly; 221. Nut sub-shell; 222. Worm gear; 223. Worm; 230. Pressure cap; 240. Bearing; 30. Mounting mechanism; 310. Loose sleeve; 311. Guide groove; 320. Sleeve; 321. Guide key; 322. Through hole; 330. Copper sleeve. Detailed Implementation

[0030] It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0031] 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 embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0033] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0034] Please see the appendix Figure 1-7 A rolling mill shaft clamping device according to one embodiment of the present invention includes a clamping claw 10, an axial drive mechanism 20, and a mounting mechanism 30, the specific scheme of which is as follows:

[0035] The axial drive mechanism 20 includes a lead screw 210 and a worm gear assembly 220, and the mounting mechanism 30 includes a sleeve 310 and a socket 320. The worm gear assembly 220 is connected to one end of the socket 320, the sleeve 310 is housed within the socket 320, the clamp 10 is connected to the end of the sleeve 310 away from the worm gear assembly 220, the lead screw 210 is housed within the sleeve 310, and the head end 211 of the lead screw 210 is connected to the clamp 10. The worm gear assembly 220 has an internal thread, and the threaded end 212 of the lead screw 210 is threadedly connected to the internal thread of the worm gear assembly 220 to allow for movable installation along its own axial direction.

[0036] Specifically, the mill shaft clamping device in this application includes a clamping claw 10, an axial drive mechanism 20, and an installation mechanism 30. The clamping claw 10 is used to grip and hold the work roll to facilitate roll changing. The axial drive mechanism 20 is used to drive the clamping claw 10 to move axially, thereby pulling out / pushing back the work roll gripped by the clamping claw 10 axially to facilitate roll changing. The installation mechanism 30 is used to install the axial drive mechanism 20 and the clamping claw 10 to achieve equipment integration, connect the various mechanisms, and facilitate subsequent disassembly and assembly.

[0037] The axial drive mechanism 20 includes a lead screw 210 and a worm gear assembly 220. The mounting mechanism 30 includes a sleeve 310 and a bushing 320. The sleeve 310 can cover the lead screw 210 to prevent it from rusting when exposed to air (e.g., accidental contact with water or corrosive liquids) and to prevent dust from accumulating on the lead screw 210 and affecting its lubrication. One end of the sleeve 310 is connected to the gripper 10, allowing it to move with the gripper 10 and remain covered over the lead screw 210. The bushing 320 serves as the main connecting component; one end is used to mount the worm gear assembly 220, while the other end can be mounted on the bending roll module for subsequent roll changing. The lead screw 210 is the main component for axial movement, while the worm gear assembly 220... The drive component that drives the lead screw 210 to move is as follows: Specifically, the worm gear assembly 220 is machined to have an internal thread structure, such that the threaded end 212 of the lead screw 210 is threadedly connected to the internal thread of the worm gear assembly 220. This allows the lead screw 210 to move axially when the worm gear assembly 220 rotates. The other end (head end 211) of the lead screw 210 is connected to the gripper 10, so that it synchronously drives the gripper 10 to move when it moves. Thus, with the ability to move the gripper 10 axially, the worm gear assembly 220 itself acts as the first layer of mechanical self-locking through the cooperation of the worm wheel 222 and the worm 223, while the threaded connection between the lead screw 210 and the worm gear assembly 220 acts as the second layer of mechanical self-locking, forming a double self-locking structure with better self-locking performance. This is different from systems that are only used in hydraulic cylinder drive systems, and offers better safety.

[0038] In a preferred embodiment of this utility model, the worm gear assembly 220 includes a nut housing 221, a worm gear 222, and a worm 223. The nut housing 221 is connected to one end of the sleeve 320. The worm gear 222 and the worm 223 are rotatably housed within the nut housing 221. The worm gear 222 has an internal thread. The threaded end 212 of the lead screw 210 passes through the worm gear 222 to be threadedly connected to the internal thread of the worm gear 222. The external gear ring of the worm gear 222 meshes with the gear ring of the worm 223.

[0039] It should be noted that the nut housing 221 is used for mounting the worm gear 222 and the worm 223, so that the worm gear 222 and the worm 223 are rotatably built into the nut housing 221. To facilitate adaptation to the structural shape of the worm gear 222 and the worm 223, it includes an arc-shaped segment and a square segment. The worm gear 222 is located in the arc-shaped segment, and the internal thread is also formed at the center of the worm gear 222, so that the threaded end 212 of the lead screw 210 passes through the worm gear 222 to form a threaded connection with the internal thread of the worm gear 222. The worm 223 is located in the square segment at the top. It can be understood that... The worm gear itself has an external gear ring, and the worm 223 itself has a helical shaft. The helical shaft and the external gear ring are meshed together, so that when the worm 223 rotates, it drives the worm gear 222 to rotate. In this application, the worm gear 222 is threadedly connected to the lead screw 210. Since the worm gear and worm 223 only rotate but remain in the same position under the restriction of the nut housing 221, the axial movement of the lead screw 210 is realized based on the principle of the lead screw 210, thereby realizing the axial movement of the gripper 10. The meshing between the worm gear 222 and the worm 223 has a self-locking effect, which, together with the threaded connection between the worm gear 222 and the lead screw 210, forms a double self-locking structure.

[0040] It is worth mentioning that the nut housing 221 and the sleeve 320 are connected by a flange, which makes the connection secure and facilitates disassembly and assembly during later maintenance, thus improving maintenance efficiency.

[0041] As a preferred embodiment of the present invention, it further includes a guide key 321. A guide groove 311 extending axially is provided on the side wall of the sleeve 310, and a through hole 322 is provided on the sleeve 320. The guide key 321 is connected to the sleeve 320, and one end of the guide key 321 extends into the sleeve 320 through the through hole 322 to be engaged in the guide groove 311.

[0042] It should be noted that the guide key 321 can prevent the loop 310 from deflecting. It cooperates with the guide groove 311 opened on the loop 310 and can also limit the axial movement range. When the axial movement is too large, the guide key 321 can abut against the side wall of the guide groove 311 along the axial direction to be stopped and thus limit further movement. The guide can be installed on the sleeve 320 by bolt connection, and its end passes through the through hole 322 so that it can be locked in the guide groove 311. Preferably, the number of guide grooves 311 can be set to two, so that the number of guide keys 321 and through holes 322 are also two, so that each guide groove 311 is provided with one guide key 321 to better improve the anti-deflection effect of the loop 310.

[0043] As a preferred embodiment of the present invention, it also includes a positioning pin 110. The head end 211 of the lead screw 210 is provided with a positioning hole extending radially therefrom. The gripper 10 is provided with a positioning channel 120 corresponding to the positioning hole. The positioning pin 110 extends into the positioning hole by passing through the positioning channel 120 to limit the axial displacement of the lead screw 210.

[0044] It is worth noting that the positioning pin 110 is used to prevent the lead screw 210 from rotating. This allows for the creation of a positioning channel 120 on the jaw 10, and a corresponding positioning hole at the head end 211 of the lead screw 210. Here, "correspondingly" means that the positioning channel 120 and the positioning hole have the same cross-sectional shape and dimensions and are coaxially aligned. Therefore, when the positioning pin 110 passes through the positioning channel 120 and extends into the positioning hole, the lead screw 210 cannot rotate; axial movement of the lead screw 210 is only achieved through the rotation of the worm gear 222 under the threaded joint. It is worth mentioning that... Yes, the positioning pin 110 can also be used for manual handling in case of transmission mechanism failure. Specifically, when there is a transmission failure, the positioning pin 110 can be removed to release the positioning. At this time, the lead screw 210 itself is rotatable. Technicians can directly rotate the head end 211 of the lead screw 210. Due to the failure, the worm gear 222 and worm 223 mechanism are in a self-locking state. The rotation of the lead screw 210 itself still drives the gripper 10 to move axially under the cooperation of the threaded connection, which improves the applicability of the equipment, can respond to emergencies in a timely manner, and facilitates rapid fault handling.

[0045] In a preferred embodiment of the present invention, the head end 211 of the lead screw 210 extends out of the gripper 10.

[0046] It is worth noting that this makes it easier for technicians to manually rotate the head end 211 of the lead screw 210 to perform manual axial movement in manual mode.

[0047] Furthermore, it also includes two copper sleeves 330 arranged opposite each other along the axial direction of the loop 310. The copper sleeves 330 are connected between the loop 310 and the sleeve 320, and the two copper sleeves 330 are respectively disposed at both ends of the sleeve 320.

[0048] It should be noted that the copper sleeve 330 has good wear resistance and self-lubricating properties, which can significantly reduce the wear between the sleeve 310 and the sleeve 320 when the sleeve moves with the gripper 10, extend the service life of the equipment, reduce friction, reduce the axial movement resistance of the equipment, and improve operating efficiency.

[0049] Furthermore, one end of the worm gear 223 extends out of the nut housing 221.

[0050] It should be understood that, in a preferred embodiment, the worm gear 223 can be driven to rotate by a hydraulic motor as a drive source. Therefore, the fact that one end of the worm gear 223 extends out of the nut housing 221 facilitates the installation and connection of the hydraulic motor.

[0051] Furthermore, it also includes two mounting units arranged opposite each other along the axial direction of the worm 223. Each mounting unit includes a cover 230 and a bearing 240. Both ends of the worm 223 are rotatably inserted into the bearing 240. The cover 230 is bolted to the nut housing 221 to press against the outside of the bearing 240, and one end of the worm 223 extends out of the cover 230.

[0052] It should be noted that the bearing 240 is used to rotatably mount the worm gear 223, ensuring stable installation. The cover 230 is used to press the bearing 240 into the nut housing 221, ensuring that the two bearings 240 are securely mounted at both ends of the worm gear 223. The cover 230 can be adjusted for tightness by bolt connection, as needed. One cover 230 needs to have an opening so that one end of the worm gear 223 can extend out for connection to the hydraulic motor.

[0053] The above are merely preferred embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A rolling mill shaft clamping device, characterized in that, This includes a gripper, an axial drive mechanism, and a mounting mechanism; among which, The axial drive mechanism includes a lead screw and a worm gear assembly, and the mounting mechanism includes a sleeve and a bushing; wherein... The worm gear assembly is connected to one end of the sleeve, the sleeve is built into the sleeve, the clamp is connected to the end of the sleeve away from the worm gear assembly, the lead screw is built into the sleeve, the head end of the lead screw is connected to the clamp, the worm gear assembly has an internal thread, and the threaded end of the lead screw is threadedly connected to the internal thread of the worm gear assembly to be movable along its own axial direction.

2. The mill shaft clamping device according to claim 1, characterized in that, The worm gear assembly includes a nut housing, a worm gear, and a worm. The nut housing is connected to one end of the sleeve. The worm gear and the worm are rotatably housed within the nut housing. The worm gear has an internal thread. The threaded end of the lead screw passes through the worm gear to be threadedly connected to the internal thread of the worm gear. The external gear ring of the worm gear meshes with the gear ring of the worm.

3. The mill shaft clamping device according to claim 1, characterized in that, It also includes a guide key, a guide groove extending axially is provided on the side wall of the sleeve, a through hole is provided on the sleeve, the guide key is connected to the sleeve, and one end of the guide key passes through the through hole and extends into the sleeve to be engaged in the guide groove.

4. The mill shaft clamping device according to claim 2, characterized in that, It also includes a positioning pin, and the head end of the lead screw has a positioning hole extending radially therein. The gripper has a positioning channel corresponding to the positioning hole. The positioning pin extends through the positioning channel and into the positioning hole to limit the axial displacement of the lead screw.

5. The mill shaft clamping device according to claim 4, characterized in that, The head end of the lead screw extends out from the gripper.

6. The mill shaft clamping device according to claim 1, characterized in that, It also includes two copper sleeves arranged opposite each other along the axial direction of the loop, the copper sleeves connecting the loop and the sleeve, and the two copper sleeves are respectively disposed at both ends of the sleeve.

7. The mill shaft clamping device according to claim 2, characterized in that, One end of the worm gear extends out of the nut housing.

8. The mill shaft clamping device according to claim 3, characterized in that, The number of guide grooves is two, and each guide groove is provided with a guide key. The two guide grooves are arranged opposite each other along the radial direction of the loop.

9. The mill shaft clamping device according to claim 2, characterized in that, It also includes two mounting units arranged opposite each other along the axial direction of the worm. Each mounting unit includes a cover and a bearing. Both ends of the worm are rotatably inserted through the bearing. The cover is bolted to the nut housing to press against the outside of the bearing, and one end of the worm extends out of the cover.

10. The mill shaft clamping device according to claim 2, characterized in that, The nut housing and the sleeve are connected by a flange.

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