Disassembling device and method for replacing a roll bearing

Abstract

The application discloses a dismounting device and method for replacing roll bearing, which comprises an inner snap ring group, a flat key is connected to the bottom of the inner snap ring group, an outer snap ring is fixed to the outer surface of the flat key, four inclined taper holes are uniformly distributed on the outer surface of the outer snap ring, a spring is connected to each ball placed in the inclined taper hole, and a pressing plate is fixed to the outer surface of the outer snap ring at the hole opening position of the inclined taper hole; the dismounting method is to respectively complete the pre-installation of the inner snap ring group and the outer snap ring, and then fix the pre-installed inner snap ring group and outer snap ring through a screw; when dismounting, the screw is removed first, then the outer snap ring is pushed towards the positioning ring by holding the handle, the spring can be compressed to push the ball into the groove on the positioning ring, the inner snap ring group is dismounted, and finally the outer snap ring is withdrawn, so that the bearing can be quickly replaced. The application can quickly dismount and install the shaft head, thereby reducing the time for replacing and maintaining the bearing and other parts on the shaft, and improving the production efficiency.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of metallurgical rolling equipment, and particularly relates to a dismounting device for replacing roll bearings and a dismounting method for replacing roll bearings. BACKGROUND

[0002] During rolling, the roll will run at high speed, and the roll bearing will be frequently worn. Therefore, the roll bearing is a device that is easily worn. In order to ensure normal operation, the bearing needs to be replaced in time, otherwise, in the rolling process, bearing wear will affect the production efficiency and the quality of the rolled plate.

[0003] In the prior art, when the roll bearing of a steel rolling mill is dismounted, two half rings connected by only screws and a pin are usually installed on the shaft head, or a snap ring with threads is used. The dismounting structure of this kind of bearing has a short service life, and as the running time of the equipment increases, the threads are prone to rust, the replacement cycle increases, and the threads of the snap ring may slip, causing certain safety hazards.

[0004] Therefore, there is an urgent need for a device that can quickly dismount the shaft head, reduce the bearing replacement time, and ensure the normal operation of the rolling mill. SUMMARY

[0005] The purpose of the present application is to provide a dismounting device for replacing roll bearings, which solves the problem of difficult replacement of roll bearings in the prior art.

[0006] Another purpose of the present application is to provide a dismounting method for replacing roll bearings.

[0007] The technical solution adopted by the present application is a dismounting device for replacing roll bearings, which comprises an inner snap ring set, a flat key is connected to the bottom of the inner snap ring set, an outer snap ring is fixed to the outer surface of the flat key, four inclined taper holes are uniformly distributed on the outer surface of the outer snap ring, a spring is connected to each inclined taper hole in which a ball is placed, and a pressing plate is fixed to the outer surface of the outer snap ring at the hole opening position of the inclined taper hole.

[0008] The present application is characterized in that the inner snap ring set comprises two half snap rings, one end of the half snap ring is connected by a pin, and the other end is connected to the flat key through a key groove hole, and a V-shaped clamping groove is formed on the outer periphery of the half snap ring.

[0009] The flat key and the outer snap ring have through holes with the same inner diameter, and a screw is fixed to the outer surface of the outer snap ring through the through hole;

[0010] The inclination angle of the outer circle to the inner circle end face of the inclined taper hole is 3-4°;

[0011] The pressing plate is connected to the outer snap ring by a bolt.

[0012] A handle is fixed to the position close to the shaft end of the outer snap ring.

[0013] Another scheme of the present application is a dismounting method for replacing the rolling mill roller bearing, which is implemented according to the following steps:

[0014] Step 1, respectively complete the pre-installation of the inner ring set and the outer ring, and then fix the pre-installed inner ring set and the outer ring through screws;

[0015] Step 2, when dismounting, first remove the screws, then push the outer ring towards the positioning ring by holding the handle, push the ball into the groove on the positioning ring, then dismount the inner ring set, and finally withdraw the outer ring to realize the replacement of the bearing.

[0016] The present application is characterized in that Step 1 is implemented according to the following steps:

[0017] Step 1.1, connect the two half rings with a pin shaft to complete the installation of the inner ring set;

[0018] Step 1.2, place the ball in the inclined taper hole, then place the spring above the ball, and finally cover the hole with a pressing plate, and fix the two ends with bolts to complete the installation of the outer ring;

[0019] Step 1.3, fix the pre-installed inner ring set and the outer ring through the through hole fixing screw.

[0020] The present application has the following beneficial effects:

[0021] (1) The present application is more convenient for installation and dismounting on the shaft through the two anti-slip handles fixed on the side of the outer ring near the shaft end;

[0022] (2) The present application can be quickly dismounted and installed on the shaft head, thereby reducing the time for replacing and maintaining the shaft bearing and other parts on the shaft, and improving the production efficiency;

[0023] (3) The inner ring set of the present application is divided into two half rings, one end of which is hinged with a pin shaft, and the other end of which is provided with a key groove, which can position the inner ring and the outer ring, and ensure that the inner ring and the outer ring will not be misaligned when the shaft rotates at high speed. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 is a structural schematic view of the dismounting device for replacing the rolling mill roller bearing of the present application;

[0025] Figure 2 is a side sectional view of the dismounting device for replacing the rolling mill roller bearing of the present application;

[0026] Figure 3 is a side view of the dismounting device for replacing the rolling mill roller bearing of the present application installed on the shaft;

[0027] In the diagram, 1. Inner retaining ring assembly, 2. Flat key, 3. Outer retaining ring, 4. Angled taper hole, 5. Ball bearing, 6. Spring, 7. Pressure plate, 8. Half retaining ring, 9. Through hole, 10. Screw, 11. Handle. Detailed Implementation

[0028] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0029] Example 1

[0030] like Figure 1 As shown, a disassembly and assembly device for replacing roll bearings includes an inner retaining ring assembly 1. A flat key 2 is engaged at the bottom of the inner retaining ring assembly 1. An outer retaining ring 3 is fixed to the outer surface of the flat key 2. Four tapered holes 4 are evenly distributed on the outer surface of the outer retaining ring 3. A ball 5 is placed in each tapered hole 4, and a spring 6 is connected to the ball 5. A pressure plate 7 is fixed to the surface of the outer retaining ring 3 at the opening of the tapered hole 4. This application achieves pressure rebound through the tapered holes 4, the ball 5, and the spring 6, enabling rapid disassembly and assembly of the bearing.

[0031] The disassembly and assembly method in this embodiment is implemented according to the following steps:

[0032] Step 1: Complete the pre-installation of the inner retaining ring assembly 1 and the outer retaining ring 3 respectively, and then fix the pre-installed inner retaining ring assembly 1 and the outer retaining ring 3.

[0033] Step 2: During disassembly, grasp the handle 11 and push the outer retaining ring 3 towards the positioning ring. The spring 6 will compress, causing the ball 5 to be pushed into the groove on the positioning ring. Then remove the inner retaining ring assembly and finally remove the outer retaining ring 3 to achieve quick bearing replacement.

[0034] Example 2

[0035] like Figure 1 As shown, a disassembly and assembly device for replacing roll bearings includes an inner retaining ring assembly 1. A flat key 2 is engaged at the bottom of the inner retaining ring assembly 1. An outer retaining ring 3 is fixed to the outer surface of the flat key 2. Four tapered holes 4 are evenly distributed on the outer surface of the outer retaining ring 3. A ball 5 is placed in each tapered hole 4, and a spring 6 is connected to the ball 5. A pressure plate 7 is fixed to the surface of the outer retaining ring 3 at the opening of the tapered hole 4. This application achieves pressure rebound through the tapered holes 4, the ball 5, and the spring 6, enabling rapid disassembly and assembly of the bearing.

[0036] The inner retaining ring assembly 1 includes two half retaining rings 8. One end of each half retaining ring 8 is connected by a pin, and the other end is connected to a flat key 2 through a keyway hole. A V-shaped retaining groove is formed on the outer circumference of each half retaining ring 8. The flat key 2 and the outer retaining ring 3 have through holes 9 with the same inner diameter. Screws 10 are fixed to the surface of the outer retaining ring 3 through the through holes 9. This arrangement can position the inner retaining ring assembly 1 and the outer retaining ring 3, ensuring that they do not misalign during high-speed roll movement, thus enhancing safety and reliability.

[0037] The disassembly and assembly method in this embodiment is implemented according to the following steps:

[0038] Step 1: Complete the pre-installation of the inner retaining ring assembly 1 and the outer retaining ring 3 respectively, and then fix the pre-installed inner retaining ring assembly 1 and the outer retaining ring 3.

[0039] Step 2: During disassembly, grasp the handle 11 and push the outer retaining ring 3 towards the positioning ring. The spring 6 will compress, causing the ball 5 to be pushed into the groove on the positioning ring. Then remove the inner retaining ring assembly and finally remove the outer retaining ring 3 to achieve quick bearing replacement.

[0040] Example 3

[0041] like Figure 1 As shown, the disassembly and assembly device for replacing roll bearings includes an inner retaining ring assembly 1, with a flat key 2 snapped into the bottom of the inner retaining ring assembly 1, and an outer retaining ring 3 fixed to the outer surface of the flat key 2, as shown. Figure 3 As shown, a handle 11 is fixed to the side of the outer retaining ring 3 near the shaft end; the handle 11 is a non-slip handle, which facilitates the user's installation and removal on the shaft.

[0042] The outer surface of the outer clasp 3 has four oblique conical holes 4 evenly distributed, and the inclination angle from the outer circle to the inner circle end face of the oblique conical hole 4 is 3° to 4°.

[0043] like Figure 2 As shown, each tapered hole 4 contains a ball bearing 5, which is connected to a spring 6. A pressure plate 7 is fixed to the surface of the outer retaining ring 3 at the opening of the tapered hole 4. The pressure plate 7 is connected to the outer retaining ring 3 by two bolts, increasing the stability of the overall structure. This application achieves pressure rebound through the tapered hole 4, the ball bearing 5, and the spring 6, enabling rapid assembly and disassembly of the bearing.

[0044] The inner retaining ring assembly 1 includes two half retaining rings 8. One end of each half retaining ring 8 is connected by a pin, and the other end is connected to a flat key 2 through a keyway hole. A V-shaped retaining groove is formed on the outer circumference of each half retaining ring 8. The flat key 2 and the outer retaining ring 3 have through holes 9 with the same inner diameter. Screws 10 are fixed to the surface of the outer retaining ring 3 through the through holes 9. This arrangement can position the inner retaining ring assembly 1 and the outer retaining ring 3, ensuring that they do not misalign during high-speed roll movement, thus enhancing safety and reliability.

[0045] The disassembly and assembly method in this embodiment is implemented according to the following steps:

[0046] Step 1: Complete the pre-installation of the inner retaining ring assembly 1 and the outer retaining ring 3 respectively, and then fix the pre-installed inner retaining ring assembly 1 and the outer retaining ring 3 with screws 10;

[0047] Step 1.1: Connect the two half-rings 8 using a pin to complete the installation of the inner ring assembly 1;

[0048] Step 1.2, the ball 5 is placed in the inclined taper hole 4, the inner circle diameter is 1 / 4 of the diameter of the ball 5, then the spring 6 is placed on the ball 5, finally the hole is covered with the pressing plate 7, both ends are fixed with bolts, the installation of the outer snap ring 3 is completed; at this time, the inner snap ring 8 is provided with a V-shaped clamping groove, the ball 5 of the outer snap ring 3 can be clamped into the clamping groove during installation;

[0049] Step 1.3, the pre-installed inner snap ring group 1 and the outer snap ring 3 are fixed through the through hole 9 and the screw 10.

[0050] Step 2, when disassembling, the screw 10 is removed first, then the outer snap ring 3 is pushed to the direction of the positioning ring by holding the handle 11, the spring 6 can be compressed, the ball 5 is pushed into the groove on the positioning ring, then the inner snap ring group is disassembled, finally the outer snap ring 3 is withdrawn, the bearing is quickly replaced.

[0051] The dismounting device and method for replacing the roll bearing have the advantages that the shaft head can be quickly dismounted and installed, so that the time of replacing and maintaining the bearings and other parts on the shaft is reduced, and the production efficiency is improved; the inner snap ring group is composed of two half rings, one end is hinged by using a pin shaft, the other end is provided with a key groove, the inner snap ring and the outer snap ring can be positioned, and the dislocation of the inner snap ring and the outer snap ring during high-speed rotation of the shaft is avoided.

Claims

1. A dismounting device for replacing a roll bearing, characterized in that, The utility model provides a kind of bearing, including inner snap ring group (1), the bottom snap joint of the inner snap ring group (1) is provided with flat key (2), the outer surface of the flat key (2) is fixed with outer snap ring (3), the outer surface of the outer snap ring (3) is evenly distributed with four inclined taper holes (4), each inclined taper hole (4) is placed with ball (5) inside, the ball (5) is connected with spring (6), the surface of the outer snap ring (3) is fixed with pressing plate (7) at the hole mouth position of inclined taper hole (4); The inner snap ring group (1) includes two half snap rings (8), one end of the half snap ring (8) is connected by pin shaft, the other end is connected with the flat key (2) by key groove hole, V-shaped clamping groove is provided on the outer periphery of the half snap ring (8), and the ball (5) of the outer snap ring (3) is clamped into the V-shaped clamping groove; The flat key (2) and the outer snap ring (3) are provided with through holes (9) with the same inner diameter, and the surface of the outer snap ring (3) is fixed with screw (10) through the through hole (9); The inclination angle of the outer circle to the inner circle end face of the inclined taper hole (4) is 3°-4°; The pressing plate (7) is connected with the outer snap ring (3) by bolt; The handle (11) is fixed to the position close to the shaft end of the side of the outer snap ring (3).

2. A method of dismounting for replacing a roll bearing, characterized in that, The device of claim 1 is used, and the following steps are implemented: Step 1, respectively complete the pre-installation of the inner snap ring group (1) and the outer snap ring (3), and then fix the pre-installed inner snap ring group (1) and the outer snap ring (3) by screw (10); Step 2, when disassembling, first remove the screw (10), then hold the handle (11) and push the outer snap ring (3) to the positioning ring direction, make the ball (5) push into the groove on the positioning ring, then disassemble the inner snap ring group (1), and finally withdraw the outer snap ring (3) to realize bearing replacement; The step 1 is implemented according to the following steps: Step 1.1, connect the two half snap rings (8) using pin shaft to complete the installation of the inner snap ring group (1); Step 1.2, place the ball (5) in the inclined taper hole (4), then place the spring (6) on the ball (5), and finally cover the hole mouth with the pressing plate (7), and fix the both ends with bolt to complete the installation of the outer snap ring (3); Step 1.3, fix the screw (10) through the through hole (9) to fix the pre-installed inner snap ring group (1) and the outer snap ring (3).

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