Dismounting device for oil film bearing in roller box

Abstract

The utility model discloses a dismounting device for an oil film bearing in a roller box, which is used for dismounting the oil film bearing from an eccentric bushing, and comprises a contact assembly mounted in the eccentric bushing, the contact assembly comprises a pressing plate, an adjusting plate and at least two contact plates, a body part and a shoulder part are formed on each contact plate, the diameter of the body part is smaller than the inner diameter of the oil film bearing, and the diameter of the shoulder part is smaller than the inner diameter of the oil film bearing; the shoulder part is located between the end of the oil film bearing and the end face of the stepped hole of the eccentric sleeve, the adjusting plate is located in a groove formed between the at least two contact plates and the end face of the stepped hole of the eccentric sleeve, and the pressing plate abuts against the side, away from the end face of the stepped hole of the eccentric sleeve, of the adjusting plate and is detachably connected with the at least two contact plates. The dismounting assembly comprises a supporting seat fixedly connected to the eccentric sleeve and a jacking assembly connected with the supporting seat, the jacking assembly and the oil film bearing are coaxially arranged, and the jacking assembly can move relative to the supporting seat in the axis direction of the jacking assembly and push the contact assembly, so that the shoulder part of the contact plate makes contact with the supporting seat and pushes the oil film bearing to be disengaged from the eccentric sleeve.

Description

TECHNICAL FIELD

[0001] The utility model relates to oil film bearing dismantling technical field, especially in a kind of roll box inner oil film bearing dismantling device. BACKGROUND

[0002] Rolling mill housing is the core equipment in finishing mill equipment, and directly contacts with rolled piece, and high-precision wire rod products are produced at high speed and continuously.The rolling process feature of high-speed wire rod is continuous rolling of blank, but there is a time interval of several seconds between adjacent blanks, which causes the rolling mill housing to bear head impact and tail steel impact, so that preventive maintenance is needed for the rolling mill housing to ensure stable and continuous production, and therefore the rolling mill housing is periodically taken offline for maintenance.Oil film bearing is a key part of the rolling mill housing, which supports the roll shaft by forming an oil film between the roll shaft and the inner hole of the oil film bearing, and the rolling force and the cleanliness of lubricating oil have a great influence on the service life of the oil film bearing.If scratches or burnout are found on the inner wall of the oil film bearing during maintenance, the oil film bearing will be checked or replaced, and a new oil film bearing will be reassembled to keep the oil film bearing in good performance and ensure the stable operation of the rolling mill housing.

[0003] At present, the small-end oil film bearing of the rolling mill housing usually adopts the following two kinds of dismounting methods: the first kind is machine tool turning, which hoists the eccentric sleeve to the machine tool, turns the inner hole of the oil film bearing, and then knocks off the oil film bearing after the wall thickness is thinned;the second kind is to use a special oil film bearing drawing tool, which clamps the multiple clamping claws of the tool on the inner hole wall of the oil film bearing, and draws out the oil film bearing through the lead screw or hydraulic or pneumatic drawing tool.

[0004] However, the above two kinds of dismounting methods need machine tool or special drawing tool to assist in the dismounting process, which takes a long time and consumes a lot of time and effort, and the special equipment has a great influence and restriction, and no matter turning or drawing, the oil film bearing will be damaged after dismounting and cannot be used again.For the misoperation in the process of assembling the oil film bearing, the oil film bearing needs to be dismounted and assembled again, and the existing dismounting scheme cannot meet the demand of non-destructive dismounting. UTILITY MODEL CONTENTS

[0005] The utility model aims to provide a kind of roll box inner oil film bearing dismantling device, solve the problem of non-destructive dismounting of oil film bearing in rolling mill housing in prior art.

[0006] The above-mentioned purpose of the utility model can be realized by using the following technical scheme:

[0007] The utility model provides a kind of roller box inner oil film bearing dismounting device, for the oil film bearing is removed from eccentric sleeve, comprising: contact subassembly, installation in the eccentric sleeve, the contact subassembly includes pressing plate, adjusting plate and at least two contact plates, the contact plate is formed with body part and shoulder part, the diameter of the body part is less than the inner diameter of the oil film bearing, the shoulder part is located between the end of the oil film bearing and the stepped hole end surface of the eccentric sleeve, the adjusting plate is located in the recess formed between at least two contact plates and the stepped hole end surface of the eccentric sleeve, the pressing plate is abutted on the side of the adjusting plate away from the stepped hole end surface of the eccentric sleeve and is detachably connected with at least two contact plates;Dismounting subassembly, including support seat fixedly connected on the eccentric sleeve and the jacking assembly connected with the support seat, the jacking assembly is coaxially arranged with the oil film bearing, the jacking assembly can move along its axial direction relative to the support seat and push the contact subassembly, so that the shoulder part of the contact plate contacts and pushes the oil film bearing to be taken out from the eccentric sleeve.

[0008] Preferably, at least one sealing groove is formed on the body part, and a flexible sealing ring is arranged in at least one sealing groove on at least two contact plates to contact the inner wall of the oil film bearing.

[0009] Preferably, the jacking assembly comprises a jacking bolt and a pad, the jacking bolt is threadedly connected with the support seat, and the pad is fixedly connected to one end of the jacking bolt close to the adjusting plate; in the state that the jacking assembly pushes the contact subassembly, the pad abuts against the adjusting plate and the contact plates.

[0010] Preferably, each contact plate is connected with the pressing plate by at least one connecting bolt, the pad is provided with a positioning light hole for each connecting bolt to pass through, and a preset gap is left between the positioning light hole and the connecting bolt; the preset gap is smaller than the difference between the inner diameter of the oil film bearing and the diameter of the body part.

[0011] Preferably, the preset gap between the positioning light hole and the connecting bolt is 0.2 mm to 0.4 mm.

[0012] Preferably, the difference between the inner diameter of the oil film bearing and the diameter of the body part is 0.6 mm to 1 mm.

[0013] Preferably, a flexible sleeve is arranged outside the body part of at least two contact plates, and the flexible sleeve is used to align the center lines of at least two contact plates with the center line of the oil film bearing.

[0014] Preferably, the flexible sleeve is made of nylon or rubber.

[0015] Preferably, the contact plate is provided with a end face fillet on one side close to the stepped hole end face of the eccentric sleeve, and is provided with an end face chamfer on the other side away from the stepped hole end face of the eccentric sleeve.

[0016] Preferably, the thickness of the adjusting plate is the same as the thickness of the at least two contact plates.

[0017] The characteristics and advantages of the present application are as follows: the oil film bearing dismounting device provided by the present application comprises a contact assembly and a dismounting assembly which are matched, can quickly dismount the oil film bearing in the small end eccentric sleeve of the roll box, saves dismounting time, the contact assembly comprises a pressing plate, an adjusting plate and at least two contact plates, the contact plate is formed with a body part and a shoulder part, the dismounting assembly comprises a supporting seat and a jacking assembly, the jacking assembly can move relative to the supporting seat along the axial direction and push the contact assembly, so that the shoulder part of the contact plate contacts and pushes the oil film bearing out of the eccentric sleeve, the design is ingenious, the processing cost is low, the operation is simple, the error cost caused by misinstallation is reduced, and the device can be widely used on various roll boxes. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical scheme in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without any creative effort.

[0019] Figure 1 The structure schematic view of the oil film bearing dismounting device provided in the embodiments of the present application is shown in the figure.

[0020] Figure 2 The installation schematic view of the oil film bearing dismounting device provided in the embodiments of the present application is shown in the figure.

[0021] Figure 3 The installation schematic view of the oil film bearing dismounting device provided in the embodiments of the present application is shown in the figure.

[0022] Figure 4 The partial enlarged view A of Figure 3

[0023] Explanation of reference numerals:

[0024] 10, oil film bearing; 20, eccentric sleeve; 30, stepped hole end face;

[0025] 1, contact assembly; 11, pressing plate; 12, adjusting plate; 13, contact plate;

[0026] ​2. Disassemble the components; 21. Support base; 22. Lifting bolt; 23. Spacer block;

[0027] 3. Flexible sealing ring;

[0028] a. Axial clearance dimension; b. Radial clearance dimension. Detailed Implementation

[0029] 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.

[0030] like Figures 1 to 3 As shown, this utility model provides a disassembly device for an oil film bearing 10 inside a roll box, used to remove the oil film bearing 10 from the eccentric sleeve 20. It includes a cooperating contact assembly 1 and a disassembly assembly 2. The contact assembly 1 is installed inside the eccentric sleeve 20 and includes a pressure plate 11, an adjusting plate 12, and at least two contact plates 13. Each contact plate 13 has a body portion and a shoulder portion. The diameter of the body portion is smaller than the inner diameter of the oil film bearing 10. The shoulder portion is located between the end of the oil film bearing 10 and the stepped hole end face 30 of the eccentric sleeve 20. The adjusting plate 12 is located between the at least two contact plates 13 and the stepped hole of the eccentric sleeve 20. Within the groove formed between the end faces 30, the pressure plate 11 abuts against the side of the step hole end face 30 of the adjusting plate 12 away from the eccentric sleeve 20 and is detachably connected to at least two contact plates 13; the disassembly assembly 2 includes a support base 21 fixedly connected to the eccentric sleeve 20 and a lifting assembly connected to the support base 21. The lifting assembly is coaxially arranged with the oil film bearing 10 to ensure that the lifting assembly does not tilt during operation and to reduce safety risks; the lifting assembly can move relative to the support base 21 along its axial direction and push the contact assembly 1, so that the shoulder of the contact plate 13 contacts and pushes the oil film bearing 10 out of the eccentric sleeve 20. Thus, the axial force is applied by the lifting assembly and transmitted to the contact plate 13, which in turn acts on the end of the oil film bearing 10. After the axial force overcomes the interference fit resistance between the oil film bearing 10 and the eccentric sleeve 20, it pushes the oil film bearing 10 to move axially in the direction away from the stepped hole end face 30 of the eccentric sleeve 20, until the oil film bearing 10 is disengaged from the inner hole of the eccentric sleeve 20, and the disassembly is completed.

[0031] The oil film bearing 10 dismounting device in the roll box provided by the application comprises a contact assembly 1 and a dismounting assembly 2 which are matched, and can quickly dismount the oil film bearing 10 in the small end eccentric sleeve 20 of the roll box, thereby saving dismounting time; the contact assembly 1 comprises a pressing plate 11, an adjusting plate 12 and at least two contact plates 13, the contact plate 13 is formed with a body portion and a shoulder portion, the dismounting assembly 2 comprises a support seat 21 and a jacking assembly, the jacking assembly can move along the axial direction of the jacking assembly and push the contact assembly 1, so that the shoulder portion of the contact plate 13 contacts and pushes the oil film bearing 10 to be separated from the eccentric sleeve 20, the design is ingenious, the processing cost is low, the operation is simple, the error cost caused by misinstallation is reduced, and the oil film bearing 10 dismounting device can be widely used on various roll boxes.

[0032] In order to avoid damaging the inner hole surface of the oil film bearing 10, the outer wall of the contact plate 13 is provided with a babbitt alloy coating, so that the inner hole of the oil film bearing 10 is not damaged in the whole dismounting process, and the oil film bearing 10 can be used continuously after being dismounted.

[0033] Specifically, referring to FIG. 1, Figure 4 As shown in the figure, the end portion of the oil film bearing 10 and the stepped hole end face 30 of the eccentric sleeve 20 have an axial gap size a, and the inner hole of the oil film bearing 10 and the stepped hole of the eccentric sleeve 20 have a radial gap size b, the axial gap size a and the radial gap size b are small, and therefore at least two contact plates 13 having a body portion and a shoulder portion are used as axial force transmission members, so as to take into account the structural strength and installation convenience.

[0034] Specifically, the oil film bearing 10 dismounting device in the roll box is installed in the following process during use: the dismounting assembly 2 is fixedly connected to the end portion of the eccentric sleeve 20 through the support seat 21; at least two contact plates 13 are installed in the eccentric sleeve 20, the adjusting plate 12 is clamped between the at least two contact plates 13, so that the shoulder portion of the at least two contact plates 13 is kept between the end portion of the oil film bearing 10 and the stepped hole end face 30 of the eccentric sleeve 20, the pressing plate 11 is installed and fixedly connected with the at least two contact plates 13, so that the adjusting plate 12 is abutted between the pressing plate 11 and the stepped hole end face 30 of the eccentric sleeve 20, thereby ensuring that the contact plate 13 effectively transmits the axial force applied by the jacking assembly to the end portion of the oil film bearing 10, achieving quick dismounting of the oil film bearing 10, saving dismounting time and improving dismounting efficiency.

[0035] According to a preferred embodiment of the application, as shown in Figures 2 to 4 The side of the contact plate 13 close to the stepped hole end face 30 of the eccentric sleeve 20 is provided with an end face round corner, and the side of the contact plate 13 away from the stepped hole end face 30 of the eccentric sleeve 20 is provided with an end face chamfer, so as to obtain better installation and structural strength.

[0036] According to a preferred embodiment of the present application, as shown in Figure 2 and Figure 3 , the thickness of the adjusting plate 12 is the same as that of the at least two contact plates 13. In this way, the adjusting plate 12 and the contact plates 13 are both abutted between the pressing plate 11 and the stepped hole end surface 30 of the eccentric sleeve 20, so as to realize the stable connection of the pressing plate 11 and the at least two contact plates 13, and ensure the overall stability of the contact assembly 1.

[0037] According to a preferred embodiment of the present application, as shown in Figure 2 , at least one sealing groove is formed on the body part, and at least one flexible sealing ring 3 is arranged in the at least one sealing groove on the at least two contact plates 13 and in contact with the inner wall of the oil film bearing 10. By arranging the flexible sealing ring 3 between the body part of the contact plate 13 and the oil film bearing 10, the inner hole of the oil film bearing 10 is further protected from damage, and the center line of the at least two contact plates 13 is aligned with the center line of the oil film bearing 10, so as to ensure the uniformity of the stress on the end part of the oil film bearing 10 during disassembly. Preferably, the flexible sealing ring 3 is an O-shaped rubber ring.

[0038] According to a preferred embodiment of the present application, the jacking assembly comprises a jacking bolt 22 and a pad 23, the jacking bolt 22 is threadedly connected with the support seat 21, and the jacking bolt 22 is fixedly connected with the pad 23 at one end close to the adjusting plate 12. In the state that the jacking assembly pushes the contact assembly 1, the pad 23 is in abutment with the adjusting plate 12 and the contact plate 13, so as to ensure that the axial force generated by rotating the jacking bolt 22 is stably transmitted to the shoulder part of the contact plate 13 through the pad 23. Specifically, as shown in Figure 2 and Figure 3 , the support seat 21 is fixed on the end part of the eccentric sleeve 20 by bolts, the jacking bolt 22 is screwed into the threaded hole of the support seat 21, the jacking bolt 22 has a small-diameter connecting part at the end, the pad 23 is sleeved on the small-diameter connecting part and is reinforced by a locking member, and the end part of the pad 23 is formed with a groove for accommodating the locking member. After the oil film bearing 10 dismounting device in the roll box is installed, the jacking bolt 22 is rotated by using a wrench or other tools. Due to the principle of thread, an axial force is generated and transmitted to the contact plate 13 through the pad 23, and then acts on the end part of the oil film bearing 10, so as to push the oil film bearing 10 out of the eccentric sleeve 20.

[0039] According to a preferred embodiment of the present application, as shown in Figure 3As shown, each contact plate 13 is connected with the pressing plate 11 through at least one connecting bolt, and the gasket 23 is provided with a positioning light hole for each connecting bolt, and a preset gap is left between the positioning light hole and the connecting bolt, and the preset gap is smaller than the difference between the inner diameter of the oil film bearing 10 and the diameter of the body part. In this way, on the basis of the coaxial arrangement of the jacking assembly and the oil film bearing 10, the cooperation of the positioning light hole on the gasket 23 and the connecting bolt ensures the gap between the at least two contact plates 13 and the inner hole of the oil film bearing 10, thereby ensuring that the contact plate 13 does not scratch the inner hole of the oil film bearing 10 during disassembly, saving the quantity of spare parts and use cost of the oil film bearing 10; and meanwhile, the force uniformity of the end part of the oil film bearing 10 during disassembly is improved.

[0040] According to a preferred embodiment of the present application, the preset gap between the positioning light hole and the connecting bolt is 0.2mm-0.4mm, so as to obtain better centring of the at least two contact plates 13.

[0041] According to a preferred embodiment of the present application, the difference between the inner diameter of the oil film bearing 10 and the diameter of the body part is 0.6mm-1mm, so as to ensure the structural strength and maintain the better gap amount between the oil film bearing 10 and the body part.

[0042] According to a preferred embodiment of the present application, the body part of the at least two contact plates 13 is provided with a flexible sleeve, and the flexible sleeve is used to align the center line of the at least two contact plates 13 with the center line of the oil film bearing 10, so as to ensure the force uniformity of the end part of the oil film bearing 10 during disassembly.

[0043] According to a preferred embodiment of the present application, the flexible sleeve is made of nylon or rubber.

[0044] Based on the above description, the oil film bearing 10 dismounting device provided by the present application has the following beneficial effects:

[0045] The roller box inner oil film bearing 10 dismounting device provided by the embodiment of the utility model includes a contact assembly 1 and a dismounting assembly 2 which are matched, can quickly dismount the oil film bearing 10 in the small end eccentric sleeve 20 of the roller box, saves the dismounting time; the contact assembly 1 includes a pressing plate 11, an adjusting plate 12 and at least two contact plates 13, the contact plate 13 is formed with a body part and a shoulder part, the dismounting assembly 2 includes a supporting seat 21 and a jacking assembly, the jacking assembly can move along the axial direction of the jacking assembly and push the contact assembly 1, so that the shoulder part of the contact plate 13 contacts and pushes the oil film bearing 10 to come out from the eccentric sleeve 20, is ingenious in design, is low in processing cost, is simple and convenient to operate, reduces the error cost caused by the wrong installation, can be widely used on various roller boxes, and is convenient to use; and, by setting a flexible sealing ring 3 between the body part of the contact plate 13 and the oil film bearing 10, or by setting a flexible sleeve on the body part of the at least two contact plates 13, or by the cooperation of the positioning light hole on the cushion block 23 and the connecting bolt for connecting the pressing plate 11 and the contact plate 13, the gap between the at least two contact plates 13 and the inner hole of the oil film bearing 10 is ensured, so that the inner hole of the oil film bearing 10 is not scratched by the contact plate 13 in the dismounting process, the spare part quantity and the use cost of the oil film bearing 10 are saved; meanwhile, the stress uniformity of the end part of the oil film bearing 10 in the dismounting process is improved.

[0046] The above only describes several embodiments of the utility model, and those skilled in the art can make various changes or modifications to the utility model embodiments according to the disclosed content of the application file without departing from the spirit and scope of the utility model.

Claims

1. A device for disassembling an oil film bearing inside a roll box, used to remove the oil film bearing from the eccentric sleeve, characterized in that, The application relates to a contact assembly and a dismounting assembly for an oil film bearing. The contact assembly is mounted in the eccentric sleeve and comprises a pressing plate, an adjusting plate and at least two contact plates, the contact plates are provided with a body part and a shoulder part, the diameter of the body part is smaller than the inner diameter of the oil film bearing, the shoulder part is located between the end of the oil film bearing and the stepped hole end surface of the eccentric sleeve, the adjusting plate is located in a groove formed between the at least two contact plates and the stepped hole end surface of the eccentric sleeve, and the pressing plate is abutted against one side of the adjusting plate away from the stepped hole end surface of the eccentric sleeve and is detachably connected with the at least two contact plates. The dismounting assembly comprises a supporting seat fixedly connected to the eccentric sleeve and a jacking assembly connected to the supporting seat, the jacking assembly is coaxial with the oil film bearing, the jacking assembly can move relative to the supporting seat along the axial direction and push the contact assembly, so that the shoulder part of the contact plate contacts and pushes the oil film bearing to be pulled out of the eccentric sleeve.

2. The oil film bearing puller for roll chocks according to claim 1, characterized in that, At least one sealing groove is formed on the body part, and a flexible sealing ring is arranged in the at least one sealing groove on the at least two contact plates and is in contact with the inner wall of the oil film bearing.

3. The oil film bearing puller for roll chocks according to claim 1, characterized in that, The jacking assembly comprises a jacking bolt and a pad, one end of the jacking bolt close to the adjusting plate is fixedly connected with the pad, and the pad is abutted against the adjusting plate and the contact plate in the state that the jacking assembly pushes the contact assembly.

4. The oil film bearing puller for roll chocks according to claim 3, characterized in that, Each contact plate is connected with the pressing plate through at least one connecting bolt, the pad is provided with a positioning light hole for the connecting bolt, a preset gap is left between the positioning light hole and the connecting bolt, and the preset gap is smaller than the difference between the inner diameter of the oil film bearing and the diameter of the body part.

5. The oil film bearing puller for roll chocks according to claim 4, characterized in that, The preset gap between the positioning light hole and the connecting bolt is 0.2mm-0.4mm.

6. The oil film bearing puller for roll chocks according to claim 5, characterized in that, The difference between the inner diameter of the oil film bearing and the diameter of the body part is 0.6mm-1mm.

7. The oil film bearing puller for roll chocks as set forth in claim 1, characterized by Flexible sleeves are arranged outside the body parts of the at least two contact plates, and the flexible sleeves are used for aligning the center lines of the at least two contact plates with the center line of the oil film bearing.

8. The oil film bearing puller for roll chocks according to claim 7, characterized in that, The flexible sleeves are made of nylon or rubber.

9. The oil film bearing puller for roll chocks as set forth in claim 1, characterized by The side of the contact plate close to the stepped hole end surface of the eccentric sleeve is provided with an end surface round corner, and the side of the contact plate away from the stepped hole end surface of the eccentric sleeve is provided with an end surface chamfer.

10. The oil film bearing puller for roll chocks as set forth in claim 1, characterized by The thickness of the adjusting plate is the same as the thickness of the at least two contact plates.

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