Clamp for roll collar

Abstract

The utility model belongs to the technical field of clamps, and particularly relates to a clamp for a roll collar. A clamp for a roller ring comprises an annular sleeve, at least three annular matching blocks which are evenly spaced are arranged on the inner wall of the annular sleeve, the width of each matching block in the axial direction is gradually increased from top to bottom, and the inner side face of each matching block is an inclined face. The matching block is matched with a pressing block, the pressing block is located on the inner side of the matching block, the face, making contact with the matching block, of the pressing block is an inclined face, and the width of the pressing block in the axial direction is gradually reduced from top to bottom; a pressing piece for driving the pressing block to descend is fixed on the annular sleeve; when the pressing block descends, the inclined face of the pressing block makes contact with the inclined face of the matching block, and the pressing block is made to move inwards in the radial direction to press the roll collar workpiece. The roll collar clamping tool has the advantage that the roll collar workpiece is prevented from being scratched by the tool when being clamped, so that the roll collar workpiece is prevented from being damaged.

Description

Technical Field

[0001] The utility model belongs to the technical field of clamps, and in particular relates to a clamp for a roller ring. Background Art

[0002] The roller ring is ring-shaped and heavy, usually 50-100kg, which is difficult to carry manually and requires a clamp for transfer.

[0003] Chinese patent application number 201820091114.5 discloses a clamp for disassembling and assembling the inner spacer ring of a working roll, comprising a circular ring and a bolt. A nut capable of cooperating with the bolt is welded to the periphery of the circular ring, and the bolt can be screwed into the nut and abut against the inner spacer ring of the working roll.

[0004] When clamping the roller ring workpiece, the above scheme needs to first set the circular ring sleeve on the outer side of the roller ring workpiece, then screw the bolts so that the nuts are against the roller ring workpiece, and then lift the entire clamp by the hoist and transfer it. However, the temperature of the roller ring workpiece is high just after sintering, and the area of ​​the nut is small, while the lateral clamping force is large, resulting in a large pressure per unit area between the nut and the roller ring workpiece, and the nut is easy to scratch the outer surface of the roller ring workpiece, thereby damaging the roller ring workpiece. Utility Model Content

[0005] The utility model aims to provide a clamp for a roller ring which can prevent the roller ring workpiece from being scratched by tooling when the roller ring workpiece is clamped, thereby causing damage to the roller ring workpiece.

[0006] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a clamp for a roller ring, comprising an annular sleeve, the inner wall of which is provided with at least three annular evenly spaced matching blocks, the axial width of the matching blocks gradually increases from top to bottom, and the inner side surface of the matching blocks is an inclined surface; the matching block is matched with a clamping block, the clamping block is located on the inner side of the matching block, the contact surface of the clamping block and the matching block is an inclined surface, and the axial width of the clamping block gradually decreases from top to bottom; a clamping member for driving the clamping block to descend is fixed on the annular sleeve; when the clamping block descends, the inclined surface of the clamping block contacts the inclined surface of the matching block and causes the clamping block to move radially inward to clamp the roller ring workpiece.

[0007] When in use, the operator sets the annular sleeve on the circumferential outer side of the roller ring workpiece, and then places the clamping block between the matching block and the roller ring workpiece, so that the matching block contacts the inclined surface of the clamping block to form a pre-match, and then the clamping piece presses the clamping block down to make the clamping block descend. During the descending process of the clamping block, the clamping block moves radially inward due to the inclined surface, thereby clamping the roller ring workpiece.

[0008] The pressing block may be an asbestos composite board, which has the advantages of high temperature resistance and greater friction, and will not scratch the surface of the roller ring workpiece.

[0009] The pressing member may be a cylinder, a quick clamp, or the like.

[0010] This solution can increase the contact surface by making the clamping block contact with the surface of the roller ring workpiece, thereby preventing the nut from scratching the surface of the roller ring workpiece; at the same time, this solution can achieve radial movement of the clamping block by matching the inclined surfaces of the clamping block and the matching block, so that the roller ring workpiece and the annular sleeve can be set concentrically. If the threaded screwing method is used, the roller ring workpiece may be offset, but after the clamping blocks are clamped, the roller ring workpiece will be corrected to be concentric with the annular sleeve, and the positioning effect is better. At the same time, the clamping piece can be an existing cylinder or a quick clamp, so that the operator does not need to screw the bolts during operation, which is more labor-saving.

[0011] Preferably, the circumferential inner side surface of the clamping block is an arc surface, and the arc surface is used to contact the circumferential outer wall of the roller ring workpiece.

[0012] By providing the cambered surface, the contact area with the roller ring workpiece can be increased, thereby further preventing the outer wall of the roller ring workpiece from being scratched.

[0013] Preferably, the matching block is provided with a limiting structure for limiting the circumferential position of the pressing block.

[0014] The limiting structure can limit the circumferential position of the pressing block, so that the pressing block will not deviate when the matching block is pre-matched and pressed down. The limiting structure can be a radially inward protrusion set on both sides of the circumference of the limiting block, thereby limiting the circumferential position of the pressing block; or the limiting block can be provided with a radially inward protrusion, and the pressing block is provided with a matching groove that matches the protrusion, thereby realizing the limitation of the circumferential position of the pressing block.

[0015] Preferably, the limiting structure is two limiting blocks, which are respectively located on both sides of the circumference of the matching block. When the clamping block is in contact with the matching block, the clamping block is located between the two limiting blocks, and the side walls on both sides of the circumference of the clamping block are in contact with the inner walls on the opposite sides of the two limiting blocks.

[0016] The limit block can be directly fixed on both sides of the matching block by screws or bolts, which is convenient for fixing. If the limit structure is the matching of the limit block and the matching groove, it is necessary to open the matching groove on the clamping block, which adds a processing step and is more troublesome.

[0017] Preferably, the pressing block comprises a first pressing portion for contacting the roller ring workpiece and a second pressing portion for contacting the inclined surface of the matching block, and the friction coefficient of the second pressing portion is smaller than the friction coefficient of the first pressing portion.

[0018] After the roller ring workpiece is transferred, the clamp is required to loosen the roller ring workpiece. In order to facilitate the separation of the clamping block and the matching block, the clamping block is composed of a first clamping part and a second clamping part made of different materials. The friction coefficient of the second clamping part is smaller than that of the first clamping part, which can facilitate the separation of the clamping block and the matching block. Among them, the first clamping part can be made of an asbestos composite board with a large friction coefficient, and the matching block and the second clamping part can be made of a tin bronze material with a low friction coefficient.

[0019] Preferably, the first pressing portion and the second pressing portion are detachably fixed.

[0020] When the roller ring workpiece is a roller ring workpiece that has just been sintered, the first clamping part is greatly worn after long-term use due to the high temperature, and the first clamping part and the second clamping part can be detachably fixed to facilitate the replacement of the first clamping part. The detachable fixation can be fixed by screw threads.

[0021] Preferably, the annular sleeve and the matching block are detachably fixed, and a fixing groove for limiting the circumferential position of the matching block is provided on the circumferential inner wall of the annular sleeve, and the end surface where the fixing groove contacts the matching block and the end surface where the matching block contacts the fixing groove are both planes.

[0022] Since the circumferential inner wall of the annular sleeve is arc-shaped, to fix the matching block, one surface of the matching block needs to be processed into an arc surface, which is troublesome. The fixing groove is directly processed on the annular sleeve and the end surface is flat, so there is no need to process the matching block. At the same time, the fixing groove can also limit the circumferential position of the matching block so that the matching block will not be offset. The matching block can be replaced by detachable fixation to adapt to the clamping of roller ring workpieces with different diameters, and the versatility is better.

[0023] Preferably, the annular sleeve is provided with an extension portion extending radially outward, the pressing piece is fixed on the extension portion, and the pressing piece is a quick clamp.

[0024] The quick clamp has low cost, simple structure and small space occupation, which is better than the cylinder.

[0025] The utility model has the following advantages: the contact surface can be increased by the contact between the clamping block and the surface of the roller ring workpiece, thereby preventing the nut from scratching the surface of the roller ring workpiece; at the same time, the radial movement of the clamping block can be achieved by the inclined surface matching of the clamping block and the matching block, so that the roller ring workpiece and the annular sleeve can be set concentrically. If the threaded screwing method is adopted, the roller ring workpiece may be offset, but after the clamping blocks are clamped, the roller ring workpiece will be corrected to be concentric with the annular sleeve, and the positioning effect is better. At the same time, the clamping piece can be an existing cylinder or a quick clamp, so that the operator does not need to screw the bolts during operation, which is more labor-saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of the utility model.

[0027] Figure 2 It is a schematic diagram of the structure of the layer plate of the utility model when clamping the roller ring workpiece.

[0028] Figure 3 It is a schematic diagram of the structure at the matching block.

[0029] Figure 4 This is a schematic diagram of the structure after removing the limit block from the matching block.

[0030] Figure 5 It is a schematic diagram of the structure of the clamping block and the matching block.

[0031] Figure 6 for Figure 1 A magnified view of point A.

[0032] Figure numbers: annular sleeve 1, lifting rope 11, extension part 12, fixing groove 13, clamping block 2, first clamping part 21, second clamping part 22, locking hole 23, arc surface 24, clamping piece 3, matching block 4, fixing hole 41, limit block 5, roller ring workpiece 100. DETAILED DESCRIPTION

[0033] The utility model is further described below based on the accompanying drawings and specific embodiments.

[0034] like Figure 1 and Figure 2 As shown, this embodiment discloses a roller ring clamp, including an annular sleeve 1, the inner diameter of the annular sleeve 1 is larger than the diameter of the roller ring workpiece 100, three lifting ropes 12 are provided on the upper end surface of the annular sleeve 1, the three lifting ropes 12 are connected by hooks (not shown) fixed on the annular sleeve 1, and the three lifting ropes 12 are evenly spaced in a ring.

[0035] like Figures 3 to 6As shown, the annular sleeve 1 is provided with three radially outwardly extending extensions 12, and a clamping member 3 is fixed on the extension 12, and the clamping member 3 is a quick clamp. The three extensions 12 are arranged evenly at intervals in an annular manner, and the inner wall of the annular sleeve 1 is provided with three fixing grooves 13 that are radially opened inward and penetrate up and down. The three fixing grooves 13 are arranged evenly at intervals in an annular manner, and the three fixing grooves 13 correspond to the extensions 12 one by one, and the fixing grooves 13 are located on the inner side of the extensions 12. The matching block 4 is provided with a radially penetrating fixing hole 41, and the annular sleeve 1 is provided with a radially extending threaded hole (not shown in the figure) at the fixing groove 13, and the threaded hole is connected to the fixing groove 13, and a bolt (not shown in the figure) passes through the fixing hole 41 and is threadedly matched with the threaded hole of the fixing groove 13, so as to realize the detachable fixation of the matching block 4 and the annular sleeve 1. Among them, the matching block 4 is partially located in the fixing groove 13, and the end face of the fixing groove 13 in contact with the matching block 4 and the end face of the matching block 4 in contact with the fixing groove 13 are both planes.

[0036] like Figures 3 to 6 As shown, the matching block 4 is matched with a clamping block 2, and the contact surfaces between the clamping block 2 and the matching block 4 are all inclined surfaces. The axial width of the matching block 4 gradually increases from top to bottom, and the axial width of the clamping block 2 gradually decreases from top to bottom. The matching block 4 is provided with two limit blocks 5 extending radially inward, and the two limit blocks 5 are respectively located on both sides of the circumference of the matching block 4. The limit blocks 5 are used to limit the circumferential position of the clamping block 2. When the clamping block 2 contacts the matching block 4, the clamping block 2 is located between the two limit blocks 5. The limit blocks 5 and the matching block 4 are detachably fixed by screws. The limit blocks 5 and a part of the matching block 4 are both located in the fixing groove 13, and the groove walls on both sides of the circumference of the fixing groove 13 are in contact with the outer walls on both sides of the circumference of the limit blocks 5, so that the fixing groove 13 limits the circumferential position of the matching block 4.

[0037] like Figure 5 and Figure 6 As shown, the clamping block 2 includes a first clamping portion 21 and a second clamping portion 22. The first clamping portion 21 is located radially inside the second clamping portion 22. The first clamping portion 21 and the second clamping portion 22 are both provided with a radially extending locking hole 23. The first clamping portion 21 and the second clamping portion 22 are detachably fixed to each other by means of a bolt threadedly mating with the locking hole 23. The first clamping portion 21 is used to contact the outer wall of the roller ring workpiece 100, and the end surface of the first clamping portion 21 in contact with the roller ring workpiece 100 is an arc surface 24. The friction coefficient of the first clamping portion 21 is greater than the friction coefficient of the second clamping portion 22. The second clamping portion 22 is used to contact the matching block 4. The first clamping portion 21 is an asbestos composite board, and the second clamping portion 22 and the matching block 4 are made of tin bronze material.

[0038] When in use, the operator moves the annular sleeve 1 so that the annular sleeve 1 is sleeved on the outside of the roller ring workpiece 100, and then the operator puts the clamping block 2 between the two limit blocks 5 so that the clamping block 2 and the matching block 4 are pre-matched. Then the operator presses the clamping piece 3 (quick clamp), and the clamping block 2 is pressed down and descends, so that the arc surface 24 of the clamping block 2 contacts the outer wall of the roller ring workpiece 100 and clamps the roller ring workpiece 100. Then the crane transfers the entire clamp and the roller ring workpiece 100. After the transfer is completed, the clamping piece 3 releases the clamping block 2, and the operator knocks the clamping block 2 away from the matching block 4, so that the clamp releases the roller ring workpiece 100.

Claims

1. A roller ring clamp, comprising an annular sleeve, characterized in that: At least three annular evenly spaced matching blocks are provided on the inner wall of the annular sleeve, the axial width of the matching block gradually increases from top to bottom, and the inner side surface of the matching block is an inclined surface; the matching block is matched with a clamping block, the clamping block is located on the inner side of the matching block, the contact surface between the clamping block and the matching block is an inclined surface, and the axial width of the clamping block gradually decreases from top to bottom; a clamping member for driving the clamping block to descend is fixed on the annular sleeve; when the clamping block descends, the inclined surface of the clamping block contacts the inclined surface of the matching block and causes the clamping block to move radially inward to clamp the roller ring workpiece.

2. The roller ring clamp according to claim 1, characterized in that: The circumferential inner side surface of the clamping block is an arc surface, and the arc surface is used to contact the circumferential outer wall of the roller ring workpiece.

3. The roller ring clamp according to claim 1, characterized in that: The matching block is provided with a limiting structure for limiting the circumferential position of the pressing block.

4. The roller ring clamp according to claim 3, characterized in that: The limiting structure comprises two limiting blocks, which are respectively located on both sides of the matching block in the circumferential direction. When the clamping block contacts the matching block, the clamping block is located between the two limiting blocks, and the side walls on both sides of the clamping block in the circumferential direction contact the inner walls on the opposite sides of the two limiting blocks.

5. The roller ring clamp according to claim 1, 2, 3 or 4, characterized in that: The pressing block comprises a first pressing portion for contacting the roller ring workpiece and a second pressing portion for contacting the inclined surface of the matching block, wherein the friction coefficient of the second pressing portion is smaller than the friction coefficient of the first pressing portion.

6. The roller ring clamp according to claim 5, characterized in that: The first pressing portion and the second pressing portion are detachably fixed.

7. The roller ring clamp according to claim 1, 2, 3 or 4, characterized in that: The annular sleeve and the matching block are detachably fixed, and a fixing groove for limiting the circumferential position of the matching block is provided on the circumferential inner wall of the annular sleeve. The end surface of the fixing groove in contact with the matching block and the end surface of the matching block in contact with the fixing groove are both planes.

8. The roller ring clamp according to claim 1, 2, 3 or 4, characterized in that: The annular sleeve is provided with an extension portion extending radially outward, and the pressing piece is fixed on the extension portion, and the pressing piece is a quick clamp.

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