CN115741417A

CN115741417A - Eccentric sleeve polishing device of plate shearing machine

Info

Publication number: CN115741417A
Application number: CN202211183114.5A
Authority: CN
Inventors: 曹宏兵
Original assignee: Jiangsu Wan Hong Machinery Technology Co ltd
Current assignee: Jiangsu Wan Hong Machinery Technology Co ltd
Priority date: 2022-09-27
Filing date: 2022-09-27
Publication date: 2023-03-07

Abstract

The invention discloses an eccentric sleeve polishing device of a plate shearing machine, and belongs to the technical field of machining of eccentric sleeves of plate shearing machines. When the polishing combined sheet is in a mutually parallel state, the sheet plates are pulled towards two ends, the elastic bent sheets are gradually straightened when the polishing combined sheet is pulled outwards, the sheet plates are attached to the upper end faces of the polishing combined sheet when the polishing combined sheet is pulled to be in a mutually parallel state, the attachment blocks are attached to the inner cavities with the grooves at the edges, and the bearing columns are enabled to sink downwards into the inner cavities with the grooves, so that the whole processed arc-shaped sheet-shaped member is limited and fixed, the polishing combined sheet is convenient to carry out polishing processing, when the arc-shaped sheet-shaped member with a smaller radian needs to be processed, a worker releases the elastic bent sheets, the inner end faces of the elastic bent sheets are attached to the two ends of the arc-shaped sheet-shaped member, the arc-shaped sheet-shaped members with various types are limited and fixed, when the arc-shaped sheet-shaped member with a larger radian is fixed, the elastic bent sheets can be placed at the interval between the two groups of adjusting mechanisms, and the arc-shaped sheet-shaped members are fixed through the distance between the inner end faces and the inner end faces of the arc-shaped sheet-shaped member and the arc-shaped member.

Description

Eccentric sleeve polishing device of plate shearing machine

Technical Field

The invention relates to the technical field of machining of eccentric sleeves of plate shearing machines, in particular to a polishing device for the eccentric sleeves of the plate shearing machines.

Background

A plate shearing machine is a machine for shearing a plate by using a blade to do reciprocating linear motion relative to another blade. The metal plates with various thicknesses are applied with shearing force by a reasonable blade gap through a movable upper blade and a fixed lower blade, so that the plates are broken and separated according to the required size. A plate shearing machine belongs to one of forging and pressing machines and mainly plays a role in the metal processing industry. The plate shearing machine is a shearing device widely applied in machining, and can shear steel plate materials with various thicknesses. The commonly used plate shearing machines are divided into 3 types, namely, horizontal shearing, rolling shearing and vibration shearing. The product is widely suitable for providing required special machinery and complete equipment in the industries of aviation, light industry, metallurgy, chemical industry, building, ships, automobiles, electric power, electric appliances, decoration and the like. The eccentric sleeve is an internal part of the plate shearing machine, and when the eccentric sleeve is installed, the surface of the eccentric sleeve needs to be polished to meet certain roughness.

The patent number CN202010575967.8 discloses an eccentric sleeve polishing device of a plate shearing machine, which comprises a base, wherein a first square groove and a third square groove are formed in the upper end of the base, a first guide groove is formed in the side end of the first square groove, a first thread block is arranged in the first guide groove in a sliding manner, a first supporting plate is fixedly connected to the upper end of the first thread block, a hydraulic cylinder is fixedly connected to the front end of the first supporting plate, a hydraulic rod is sleeved in the hydraulic cylinder, and a polishing block is fixedly connected to the front end face of the hydraulic rod; the first thread block is in threaded connection with a screw rod, a first bevel gear is fixedly connected to the side end of the screw rod, a second bevel gear is meshed with the first bevel gear, a first rotating shaft is fixedly connected to the front end of the second bevel gear, and a first disc is fixedly connected to the front end of the first rotating shaft.

The polishing device solves the problems that when the machining length of the traditional eccentric sleeve polishing device is adjusted, the distance between the clamps is adjusted by moving the tailstock, and when the tailstock is moved, the fastening stud is required to be loosened and then the eccentric sleeve is held for comparison, and trial is carried out while moving, so that the difficulty in adjusting the length is increased; but can not carry out spacing problem of blockking to the arc sheet component of different radians in the in-process of processing.

Disclosure of Invention

1. Technical problem to be solved

The invention aims to provide an eccentric sleeve polishing device of a plate shearing machine, which solves the problem that arc-shaped sheet-shaped components with different radians cannot be limited and blocked in the processing process so as to solve the problems in the background technology.

2. Technical scheme

The polishing device for the eccentric sleeve of the plate shearing machine comprises an adjusting mechanism and a processing mechanism, wherein the processing mechanism is arranged between the adjusting mechanisms and comprises a fixed column and an adjusting ring, the adjusting ring is arranged at two ends of the fixed column, the other end of the adjusting ring is movably connected with the processing mechanism, the processing mechanism comprises a first processing disc, a polishing mechanism, a limiting mechanism, a second processing disc, an outer mounting plate and an elastic bent plate, the polishing mechanism is arranged at one side of the first processing disc, the limiting mechanism is arranged between the polishing mechanisms, the other end of the polishing mechanism is movably connected with the second processing disc, the outer mounting plate is arranged at two ends of the polishing mechanism, the outer mounting plates are movably connected through the elastic bent plate, and when the arc-shaped sheet member with a small radian needs to be processed, a worker releases the elastic bent plate to enable the inner end face of the elastic bent plate to be attached to two ends of the arc-shaped sheet member, so that multiple types of arc-shaped sheet members are limited and fixed.

Preferably, first processing dish includes driving motor, transmission shaft, interlude pole, drive mechanism and hinders the retaining ring outward, one side of driving motor sets up the transmission shaft, the other end and the interlude pole swing joint of transmission shaft, the interlude pole runs through the inner chamber of drive mechanism, the outer end of drive mechanism and the laminating of the inner chamber wall that hinders the retaining ring outward.

Preferably, the moving mechanism comprises a sleeve joint cylinder, two extension rods, an installation block, a driving gear and a transmission gear, wherein two sets of extension rods are arranged in an outer ring annular array of the sleeve joint cylinder, the other ends of the two sets of extension rods are movably connected with the installation block, the transmission gear is installed on the side end face of the installation block, the inner end of the transmission gear is meshed with the driving gear, an arc-shaped sheet component to be processed is placed into an inner cavity of the device and is located between the outer installation sheet plates, the lower end face of the arc-shaped sheet component is attached to the outer end face of the limiting ring cylinder, the transmission shaft is driven to rotate through the driving motor, the penetrating rod is driven to drive the driving gear to rotate in the same direction, the transmission gear drives the polishing combined sheet to rotate in the same direction in the rotating process.

Preferably, the inserting rod penetrates through the inner cavity of the sleeve joint barrel, so that the inserting rod is movably connected with the driving gear.

Preferably, the polishing mechanism comprises two groups of polishing combined sheets, an edge groove and a groove, the edge groove is formed in the upper end surfaces of the two groups of polishing combined sheets, and the groove is formed in one side of the edge groove.

Preferably, two groups of the polishing combination pieces are rotatably connected by a hinge strip, and the maximum rotation angle between the polishing combination pieces is 180 degrees.

Preferably, when the two groups of polishing combined sheets are parallel to each other, a rectangular concave structure is formed between the two groups of grooves, when the arc-shaped sheet-shaped member with a larger arc degree is fixed, the arc-shaped sheet-shaped member can be placed at the interval between the two groups of adjusting mechanisms, and the arc-shaped sheet-shaped member is fixed through the distance between the two groups of adjusting mechanisms.

Preferably, the elastic bent piece comprises a piece plate and a fitting block, the inner cavity wall of the piece plate is transversely provided with the fitting block, when the polishing combined piece is in a mutually parallel state, a worker pulls the outer installation piece plates to two ends, the elastic bent piece is gradually straightened when the polishing combined piece is pulled outwards, the piece plate is fitted with the upper end face of the polishing combined piece when the polishing combined piece is pulled to be in a mutually parallel state, the fitting block is fitted with the inner cavity with the grooves formed in the edge, and the bearing column is enabled to sink into the inner cavity with the grooves formed downwards, so that the whole of the processed arc-shaped sheet-shaped component is limited and fixed, and the polishing combined piece is convenient to polish.

Preferably, the limiting mechanism comprises a limiting ring cylinder and a bearing column, the bearing column is arranged on one side of the limiting ring cylinder, and the side end face of the limiting ring cylinder is attached to the upper end face of the polishing combination piece.

Preferably, the fitting block is a member made of synthetic rubber, the fitting block is a cross-shaped member, and a transverse rod of the fitting block can be inserted into an inner cavity of the edge groove, so that the polishing mechanism and the elastic bent piece are integrated.

3. Advantageous effects

Compared with the prior art, the invention has the advantages that:

1. the invention provides an eccentric sleeve polishing device of a plate shearing machine, wherein an arc-shaped sheet member to be processed is placed into an inner cavity of the device and is positioned between outer installation sheet plates, the lower end face of the arc-shaped sheet member is attached to the outer end face of a limiting ring cylinder, a driving shaft is driven to rotate through a driving motor, so that a penetration rod is driven to drive a driving gear to rotate in the same direction, a driving gear is driven to rotate, and a polishing combination sheet is driven to rotate in the same direction during the rotation process of the driving gear.

2. The invention provides an eccentric sleeve polishing device of a plate shearing machine, wherein when polishing combined sheets are in a mutually parallel state, a worker pulls outer installation sheet plates towards two ends, an elastic bent sheet is gradually straightened when the polishing combined sheets are pulled outwards, the sheet plates are attached to the upper end surfaces of the polishing combined sheets when the polishing combined sheets are pulled to be in a mutually parallel state, at the moment, an attaching block is attached to an inner cavity with a groove at the edge, and a bearing column is downwards sunk into the inner cavity with the groove, so that the whole processed arc sheet member is limited and fixed, and the polishing processing of the arc sheet member is facilitated.

3. The invention provides an eccentric sleeve polishing device of a plate shearing machine, which is characterized in that when an arc-shaped sheet member with a smaller radian needs to be machined, a worker releases an elastic bent sheet to enable the inner end surface of the elastic bent sheet to be attached to two ends of the arc-shaped sheet member, so that various types of arc-shaped sheet members are limited and fixed, when the arc-shaped sheet member with a larger radian is fixed, the elastic bent sheet can be placed at the interval between two groups of adjusting mechanisms, and the arc-shaped sheet member is fixed through the distance between the two groups of adjusting mechanisms.

Drawings

FIG. 1 is a schematic view of the overall structure of an eccentric sleeve polishing device of a plate shearing machine according to the present invention;

FIG. 2 is a schematic structural view of a machining mechanism of the eccentric sleeve polishing device of the plate shearing machine according to the present invention;

FIG. 3 is a schematic structural view of a first processing disk of the polishing device for the eccentric sleeve of the plate shearing machine according to the present invention;

FIG. 4 is a schematic structural diagram of a driving mechanism of the polishing device for the eccentric sleeve of the plate shearing machine according to the present invention;

FIG. 5 is a schematic diagram of the polishing mechanism and the limiting mechanism of the polishing device for the eccentric sleeve of the plate shearing machine according to the present invention;

FIG. 6 is a schematic structural view of a polishing mechanism of an eccentric sleeve polishing device of the plate shearing machine according to the present invention;

FIG. 7 is a schematic view of the elastic bending piece structure of the polishing device for the eccentric sleeve of the plate shearing machine according to the present invention.

The reference numbers in the figures illustrate: 1. an adjustment mechanism; 11. fixing a column; 12. an adjusting ring; 2. a processing mechanism; 21. a first processing tray; 211. a drive motor; 212. a drive shaft; 213. inserting the rod; 214. a drive mechanism; 2141. sleeving a sleeve; 2142. an extension rod; 2143. mounting blocks; 2144. driving the gear; 2145. a transmission gear; 215. an outer check ring; 22. a polishing mechanism; 221. polishing the combined sheet; 222. grooving the edge; 223. forming a groove; 23. a limiting mechanism; 231. a limiting ring cylinder; 232. a support post; 24. a second processing tray; 25. externally mounting a sheet plate; 26. an elastic bending sheet; 261. a sheet; 262. and (7) fitting the blocks.

Detailed Description

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations or positional relationships based on those shown in the drawings, merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention.

In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "sleeved/connected," "connected," and the like are to be construed broadly, e.g., "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1-7, the present invention provides a technical solution:

example 1

Plate shearing machine eccentric bushing burnishing device, including guiding mechanism 1 and processing agency 2, install processing agency 2 between the guiding mechanism 1, guiding mechanism 1 includes fixed column 11 and regulation ring 12, regulation ring 12 is all installed at the both ends of fixed column 11, the other end and the processing agency 2 swing joint of regulation ring 12, processing agency 2 includes first processing dish 21, polishing mechanism 22, stop gear 23, second processing dish 24, outer mounting plate 25 and elasticity bent piece 26, one side of first processing dish 21 sets up polishing mechanism 22, set up stop gear 23 between the polishing mechanism 22, the other end and the second processing dish 24 swing joint of polishing mechanism 22, outer mounting plate 25 is all installed at the both ends of polishing mechanism 22, through elasticity bent piece 26 swing joint between the outer mounting plate 25, when needing to process the less arc slice component of radian, staff release elasticity bent piece 25, make its interior terminal surface laminate with the both ends of arc slice component, thereby carry out spacing fixed processing to the arc slice component of multiple type.

Example 2

The first processing disc 21 includes a driving motor 211, a transmission shaft 212, a penetration rod 213, a driving mechanism 214 and an outer stop ring 215, the transmission shaft 212 is disposed on one side of the driving motor 211, the other end of the transmission shaft 212 is movably connected to the penetration rod 213, the penetration rod 213 penetrates through an inner cavity of the driving mechanism 214, an outer end of the driving mechanism 214 is attached to an inner cavity wall of the outer stop ring 215, the driving mechanism 214 includes a sleeve barrel 2141, an external rod 2142, a mounting block 2143, a driving gear 2144 and a transmission gear 2145, two groups of external rods 2142 are disposed in an outer ring array of the sleeve barrel 2141, the other ends of the two groups of external rods 2142 are movably connected to the mounting block 2143, a transmission gear 2145 is disposed on a side end surface of the mounting block 2143, an inner end of the transmission gear 2145 is engaged with the driving gear 2144, an arc-shaped sheet member to be processed is placed into an inner cavity of the device to be located between the outer mounting sheet plates 25, a lower end surface of the arc-shaped sheet member is attached to a surface of the limiting barrel 231, the transmission shaft 212 is driven by the driving the penetration rod 213 to rotate along with the transmission gear 2145, and the transmission gear 2145 is driven to rotate in the same direction, and the same as the outer end of the transmission gear 2145, thereby rotating process of the transmission gear rotating process of the transmission plate rotating in the rotating process.

Example 3

Inserting rod 213 runs through the inner cavity of sleeve barrel 2141, make inserting rod 213 and drive gear 2144 swing joint, polishing mechanism 22 includes two sets of polishing combination pieces 221, edge fluting 222 and sets up recess 223, the up end of two sets of polishing combination pieces 221 all is provided with edge fluting 222, recess 223 is set up in one side of edge fluting 222, through hinge strip swivelling joint between two sets of polishing combination pieces 221, the biggest rotation angle is 180 degrees between the polishing combination pieces 221, when two sets of polishing combination pieces 221 are parallel to each other, be rectangle indent structure between two sets of recess 223 of seting up, when fixed to the great arc slice component of radian, can place it in the interval department of two sets of guiding mechanism 1, fix the arc slice component through the interval of the two.

Example 4

The elastic bent piece 26 comprises a piece plate 261 and a joint block 262, the joint block 262 is transversely arranged on the inner cavity wall of the piece plate 261, when the polishing combined pieces 221 are in a mutually parallel state, a worker pulls the outer installation piece plates 25 towards two ends, the elastic bent piece 26 is gradually straightened when the polishing combined pieces 221 are pulled outwards, when the polishing combined pieces 221 are pulled to be in a mutually parallel state, the piece plate 261 is jointed with the upper end face of the polishing combined pieces 221, at the moment, the joint block 262 is jointed with the inner cavity of the edge groove 222, and the bearing column 232 is enabled to sink downwards into the inner cavity provided with the groove 223, so that the whole processed arc-shaped piece member is limited and fixed, the polishing processing of the arc-shaped piece member is facilitated, the limiting mechanism 23 comprises a limiting ring cylinder 231 and the bearing column 232, the bearing column 232 is arranged on one side of the limiting ring cylinder 231, the side end face of the limiting ring cylinder 231 is jointed with the upper end face of the polishing combined pieces 221, the joint block 262 is a synthetic rubber member, the joint block 262 is a cross-shaped member, the transverse rod of the joint block 262 can be inserted into the inner cavity of the edge groove 222, and the elastic bent piece 26 and the polishing combined piece 26 can be a whole polishing combined into a polishing mechanism.

In addition to this: when the polishing combination piece 221 is in a parallel state, a worker pulls the outer installation piece plates 25 towards two ends, when the polishing combination piece 221 is pulled outwards, the elastic bent piece 26 is straightened gradually, when the polishing combination piece 221 is pulled to be in a parallel state, the piece plate 261 is attached to the upper end face of the polishing combination piece 221, at the moment, the attachment block 262 is attached to the inner cavity of the edge groove 222, the bearing column 232 is made to sink downwards into the inner cavity provided with the groove 223, the whole processed arc-shaped sheet-shaped member is limited and fixed, polishing processing is facilitated, when an arc-shaped sheet-shaped member with a small radian needs to be processed, the worker releases the elastic bent piece 25, the inner end face of the elastic bent piece is attached to two ends of the arc-shaped sheet-shaped member, limiting and fixing processing is performed on various types of arc-shaped sheet-shaped members, when the arc-shaped sheet-shaped member with a large radian is fixed at the interval between the two groups of adjusting mechanisms 1.

In summary, the following steps: a polishing device for an eccentric sleeve of a plate shearing machine comprises an adjusting mechanism 1 and a processing mechanism 2, wherein the processing mechanism 2 is arranged between the adjusting mechanisms 1, the adjusting mechanism 1 comprises a fixed column 11 and an adjusting ring 12, the adjusting ring 12 is arranged at two ends of the fixed column 11, the other end of the adjusting ring 12 is movably connected with the processing mechanism 2, the processing mechanism 2 comprises a first processing disc 21, a polishing mechanism 22, a limiting mechanism 23, a second processing disc 24, an outer mounting plate 25 and an elastic bent plate 26, the polishing mechanism 22 is arranged at one side of the first processing disc 21, the limiting mechanism 23 is arranged between the polishing mechanisms 22, the other end of the polishing mechanism 22 is movably connected with the second processing disc 24, the outer mounting plates 25 are arranged at two ends of the polishing mechanism 22, the outer mounting plates 25 are movably connected through the elastic bent plate 26, an arc-shaped sheet member to be processed is placed into an inner cavity of the polishing device and is positioned between the outer mounting plates 25, the lower end face of the arc-shaped sheet-shaped member is attached to the outer end face of the limiting ring cylinder 231, the driving motor 211 drives the transmission shaft 212 to rotate, so as to drive the insertion rod 213 to drive the driving gear 2144 to rotate in the same direction, the transmission gear 2145 drives the polishing combined piece 221 to rotate in the same direction in the rotating process, when the polishing combined piece 221 is in a mutually parallel state, a worker pulls the outer mounting piece plate 25 towards both ends, the elastic bent piece 26 is gradually straightened under the outward pulling of the polishing combined piece 221, when the polishing combined piece 221 is pulled to be in a mutually parallel state, the piece plate 261 is attached to the upper end face of the polishing combined piece 221, at the moment, the attaching block 262 is attached to the inner cavity of the edge slot 222, and the receiving column 232 is downward sunk into the inner cavity provided with the groove 223, so as to limit and fix the whole processed arc-shaped sheet-shaped member, it polishes the processing of being convenient for, when the less arc flaky component of needs processing radian, staff release elasticity flexure 25 makes its interior end face laminate with the both ends of arc flaky component to carry out spacing fixed processing to polytype arc flaky component, when fixed to the great arc flaky component of radian, can place it in the interval department of two sets of guiding mechanism 1, fix the arc flaky component through the interval of the two.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and the preferred embodiments of the present invention are described in the above embodiments and the description, and are not intended to limit the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The polishing device for the eccentric sleeve of the plate shearing machine comprises an adjusting mechanism (1) and a processing mechanism (2), wherein the processing mechanism (2) is installed between the adjusting mechanism (1), and is characterized in that the adjusting mechanism (1) comprises a fixing column (11) and an adjusting ring (12), the adjusting ring (12) is installed at each of two ends of the fixing column (11), the other end of the adjusting ring (12) is movably connected with the processing mechanism (2), the processing mechanism (2) comprises a first processing disc (21), a polishing mechanism (22), a limiting mechanism (23), a second processing disc (24), an outer installation sheet plate (25) and an elastic bent sheet (26), the polishing mechanism (22) is arranged on one side of the first processing disc (21), the limiting mechanism (23) is arranged between the polishing mechanisms (22), the other end of the polishing mechanism (22) is movably connected with the second processing disc (24), the outer installation sheet plates (25) are installed at each of two ends of the polishing mechanism (22), and the outer installation sheet plates (25) are movably connected through the elastic bent sheet (26).

2. The polishing device for the eccentric sleeve of the plate shearing machine as claimed in claim 1, wherein: first processing dish (21) include driving motor (211), transmission shaft (212), interlude pole (213), drive mechanism (214) and block retaining ring (215) outward, one side of driving motor (211) sets up transmission shaft (212), the other end and the interlude pole (213) swing joint of transmission shaft (212), the inner chamber that drives mechanism (214) is run through in interlude pole (213), the outer end that drives mechanism (214) and the laminating of the inner chamber wall that blocks retaining ring (215) outward.

3. The polishing device for the eccentric sleeve of the plate shearing machine as claimed in claim 2, wherein: the power transmission mechanism (214) comprises a sleeve joint barrel (2141), an external connecting rod (2142), an installation block (2143), a driving gear (2144) and a transmission gear (2145), wherein the outer ring of the sleeve joint barrel (2141) is annularly arranged with two groups of external connecting rods (2142), the other ends of the two groups of external connecting rods (2142) are movably connected with the installation block (2143), the transmission gear (2145) is installed on the side end face of the installation block (2143), and the inner end of the transmission gear (2145) is meshed with the driving gear (2144).

4. The polishing device for the eccentric sleeve of the plate shearing machine as claimed in claim 2, wherein: the inserting rod (213) penetrates through the inner cavity of the sleeve joint barrel (2141), so that the inserting rod (213) is movably connected with the driving gear (2144).

5. The polishing device for the eccentric sleeve of the plate shearing machine as claimed in claim 1, wherein: the polishing mechanism (22) comprises two groups of polishing combination pieces (221), an edge groove (222) and a groove (223), wherein the edge groove (222) is formed in the upper end face of each of the two groups of polishing combination pieces (221), and the groove (223) is formed in one side of the edge groove (222).

6. The polishing device for the eccentric sleeve of the plate shearing machine as claimed in claim 5, wherein: the two groups of polishing combination pieces (221) are rotatably connected through hinge strips, and the maximum rotation angle between the polishing combination pieces (221) is 180 degrees.

7. The polishing device for the eccentric sleeve of the plate shearing machine as claimed in claim 5, wherein: when the two groups of polishing combination pieces (221) are parallel to each other, the two groups of grooves (223) are in a rectangular concave structure.

8. The polishing device for the eccentric sleeve of the plate shearing machine as claimed in claim 1, wherein: the elastic bent piece (26) comprises a piece plate (261) and a fitting block (262), and the fitting block (262) is transversely arranged on the inner cavity wall of the piece plate (261).

9. The polishing device for the eccentric sleeve of the plate shearing machine as claimed in claim 1, wherein: the limiting mechanism (23) comprises a limiting ring cylinder (231) and a bearing column (232), the bearing column (232) is arranged on one side of the limiting ring cylinder (231), and the side end face of the limiting ring cylinder (231) is attached to the upper end face of the polishing combination piece (221).

10. The polishing device for the eccentric sleeve of the plate shearing machine as claimed in claim 8, wherein: the fitting block (262) is a member made of synthetic rubber, the fitting block (262) is a cross-shaped member, and a transverse rod of the fitting block (262) can be inserted into an inner cavity of the edge groove (222), so that the polishing mechanism (22) and the elastic bent piece (26) are integrated.