CN112936095A

CN112936095A - Lifting mechanism capable of avoiding clamping based on mechanical machining workpiece lifting

Info

Publication number: CN112936095A
Application number: CN202110117391.5A
Authority: CN
Inventors: 汤继芬
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-02-05
Filing date: 2020-02-05
Publication date: 2021-06-11
Also published as: CN112936094A; CN113211313A; CN111230737B; CN111230737A

Abstract

The invention provides a lifting mechanism capable of avoiding clamping based on lifting of a machined workpiece, relates to the technical field of machining, and aims to solve the problems that in the precision machining process, the lifting requirement of the workpiece is high, height deviation cannot occur at each position, and only the lifting mechanism is possibly clamped once deviation occurs, and a conventional lifting power mechanism is mainly vertically arranged at the bottom of a bearing mechanism by adopting an air cylinder, and if the weight of the workpiece is heavy, a large amount of load is easily generated, so that the service life of the air cylinder is influenced, and the lifting precision is influenced; and the middle part of the top plane of the base is longitudinally provided with a pushing mechanism. According to the invention, as the electric cylinder is longitudinally and fixedly arranged at the rear end of the top plane of the pushing mechanism, and the inner side wall of the guide guard plate is provided with the protrusion matched with the push block, power can be provided by the transverse electric cylinder, the direct load of the upper workpiece on the electric cylinder is reduced, and the service life of the electric cylinder is prolonged.

Description

Lifting mechanism capable of avoiding clamping based on mechanical machining workpiece lifting

The application has the following application numbers: 2020100810589, the name is: the invention discloses a lifting mechanism for avoiding clamping based on mechanical processing of a workpiece, which is applied in divisional patent application, and the application date of the original patent is as follows: year 2020, month 02, day 05.

Technical Field

The invention relates to the technical field of machining, in particular to a lifting mechanism for avoiding clamping based on lifting of a machined workpiece.

Background

In the machining process, due to machining requirements, the workpiece needs to be lifted so as to facilitate conversion of machining procedures.

For example, a shaft sleeve clamping and lifting mechanism in patent application CN201820971484.8, which belongs to the field of workpiece processing mechanical equipment. The utility model discloses a lifting chain both sides are convoluteed the meshing respectively about and are connected in the rotating sprocket of lifting support both sides, it is provided with the lift baffle to slide along vertical direction on the lift guide arm, the vertical fixed promotion arm-tie that is provided with in lift baffle one side, the upper junction plate and the lower connecting plate of lift chain one side respectively with promote both sides fixed connection about the arm-tie, be provided with limit switch on the promotion support of both sides about spacing company's board respectively, card material mechanism level sets up in lift baffle one side, card material mechanism is including card material support, card material is board even, card material motor and kelly support. The utility model has the advantages of reasonable design, can be convenient firm with the high-efficient steady promotion in the fixed back of multiple size specification's axle sleeve chucking to can transport the axle sleeve level to required station, improve the degree of automation that the axle sleeve was transferred, satisfy the needs that processing was used.

In the precision finishing process, the promotion requirement of work piece is higher, and high deviation can not appear in each position, and in case the deviation appears probably only hoist mechanism blocks, and conventional promotion power unit adopts the cylinder to vertically install in the load bearing mechanism bottom more in addition, if work piece weight is heavier then easily produce a large amount of loads, influences the life and the promotion precision of cylinder.

Therefore, in view of the above, research and improvement are made on the existing structure and defects, and a lifting mechanism for avoiding jamming based on the lifting of a machined workpiece is provided, so as to achieve the purpose of higher practical value.

Disclosure of Invention

In order to solve the technical problems, the invention provides a lifting mechanism for lifting and avoiding clamping based on a machined workpiece, and aims to solve the problems that in the precision machining process, the lifting requirement of the workpiece is high, height deviation cannot occur at each position, and once deviation occurs, the lifting mechanism is only possibly clamped, and a conventional lifting power mechanism is mainly vertically arranged at the bottom of a bearing mechanism by using an air cylinder, and if the weight of the workpiece is heavy, a large amount of load is easily generated, so that the service life of the air cylinder is influenced, and the lifting precision is influenced.

The invention is based on the purpose and the efficacy of lifting a lifting mechanism for lifting a machined workpiece to avoid clamping, and is achieved by the following specific technical means:

a lifting mechanism for avoiding clamping based on mechanical processing workpiece lifting comprises a base; the middle part of the top plane of the base is longitudinally provided with a pushing mechanism; lifting mechanisms are respectively and vertically and upwards fixedly arranged at four corners of the plane at the top of the base; the upper ends of the four lifting mechanisms are respectively and fixedly arranged at four corners of the bottom plane of the horizontal rectangular bearing mechanism; a synchronous mechanism is longitudinally arranged on the base between the two lifting mechanisms at the left end and the base between the two lifting mechanisms at the right end respectively; the left end and the right end of the synchronous mechanism are respectively and rotatably connected with the corresponding lifting mechanism;

the middle part of the bottom plane of the bearing mechanism is vertically and downwards fixedly provided with a supporting mechanism, and the root parts of the supporting mechanism and the bearing mechanism are vertically provided with a door-shaped switching mechanism; the inner sides of the left end and the right end of the conversion mechanism are respectively and rotatably connected with the lifting mechanisms at corresponding positions; the supporting mechanism corresponds to the pushing mechanism below, and the lower end of the supporting mechanism is abutted against the pushing mechanism.

The base includes the guide board, the planar left end edge department middle part in base top and right-hand member edge department middle part are the perpendicular upwards fixed mounting guide board respectively, and its guide board is half cylindrical structure, two the interior concave surface of guide board is relative.

Furthermore, pushing mechanism includes electric cylinder, direction backplate, ejector pad and extrusion piece, the vertical fixed mounting in rear end of pushing mechanism top plane has electric cylinder, and the piston rod front end fixed mounting of its electric cylinder has the ejector pad, and the bottom of its ejector pad is tangent with pushing mechanism's top plane, and the upper end of ejector pad then fixed mounting has wedge form extrusion piece, and the front end of its extrusion piece is the inclined plane structure of slope to the front below, and the position punishment that lies in ejector pad left side and right side on the pushing mechanism do not is provided with the direction backplate that is connected with the ejector pad slip perpendicularly, is provided with the arch that suits with the ejector pad on the inside wall of its direction backplate.

Further, hoist mechanism includes lifting column and tooth hole, equal slidable mounting has lifting column in hoist mechanism's the inner chamber, and its upper end fixed mounting that lifts the column is on bearing mechanism's bottom plane, and the tooth hole has all been seted up to the relative position department in the middle part of hoist mechanism's inboard, and its tooth hole corresponds with lazytongs's upper end height.

Furthermore, the bearing mechanism comprises cushion blocks, four corners of the plane at the top of the bearing mechanism are fixedly provided with the cushion blocks through four corner blocks which are arranged in a rectangular manner, and the four cushion blocks are consistent in height.

Furthermore, the synchronizing mechanism comprises a synchronizing shaft, a driven gear and a driving gear, the synchronizing shaft is longitudinally installed at the upper end of the synchronizing mechanism, the driven gear is fixedly installed at each of the two ends of the synchronizing shaft, the driven gear is just arranged in a tooth hole of the lifting mechanism and meshed with teeth formed in the lifting column, and the driving gear is fixedly installed in the middle of the synchronizing shaft.

Further, the shifter includes montant and interlock tooth, the planar left end of shifter bottom and right-hand member punishment do not perpendicular downward fixed mounting have the montant, and the position department corresponding with the driving gear on the lower extreme cambered surface of its montant is provided with vertical interval arrangement's interlock tooth to the montant meshes with the driving gear mutually, and in addition, the outer end of montant is tangent with the intrados of guide board.

Furthermore, the supporting mechanism comprises a supporting wheel, the supporting wheel is transversely installed at the lower end of the supporting mechanism, the supporting mechanism at the front end and the rear end of the installation position of the supporting wheel is provided with inclined notches, the cylindrical surface of the supporting wheel is evenly provided with anti-slip strips at intervals, and the anti-slip strips are also arranged on the inclined surface of the extrusion block tangent to the supporting wheel.

Compared with the prior art, the invention has the following beneficial effects:

because the rear end of the top plane of the pushing mechanism is longitudinally and fixedly provided with the electric cylinder, the front end of a piston rod of the electric cylinder is fixedly provided with the push block, the bottom of the push block is tangent to the top plane of the pushing mechanism, the upper end of the push block is fixedly provided with the wedge-shaped extrusion block, the front end of the extrusion block is of an inclined plane structure inclined towards the front lower side, guide guard plates connected with the push block in a sliding mode are vertically arranged at positions on the left side and the right side of the push block on the pushing mechanism respectively, protrusions matched with the push block are arranged on the inner side wall of the guide guard plate, power can be provided through the transverse electric cylinder, the direct load of a workpiece above the electric cylinder is reduced, and the service life of the electric cylinder is prolonged.

Because the lifting columns are slidably arranged in the inner cavities of the lifting mechanisms, the upper ends of the lifting columns are fixedly arranged on the bottom plane of the bearing mechanism, the inner sides of the middle parts of the lifting mechanisms are provided with tooth holes corresponding to the upper end of the synchronizing mechanism in height, the upper ends of the synchronizing mechanism are longitudinally provided with synchronizing shafts, the two ends of each synchronizing shaft are respectively and fixedly provided with driven gears, the driven gears are just arranged in the tooth holes of the lifting mechanisms and meshed with teeth arranged on the lifting columns, the middle parts of the synchronizing shafts are fixedly provided with driving gears, the driving gears can be driven to rotate by the rotation of the driving gears, so that the lifting mechanisms synchronously lift and avoid being clamped, vertical rods are respectively and vertically and downwards fixedly arranged at the left end and the right end of the bottom plane of the switching mechanism, and meshing teeth which are vertically arranged at intervals are arranged at the positions, corresponding to the driving gears, on the lower end cambered surfaces, and the montant meshes with the driving gear mutually, furthermore, the outer end of montant is tangent with the intrados of guide board, the accessible shifter gets up the hoist mechanism synchronous linkage of left end and right-hand member, further avoid going up and down to block, finally, supporting mechanism includes the supporting wheel, the supporting wheel is transversely installed to the lower extreme of supporting mechanism, and the supporting mechanism of the front end of supporting wheel installation department and rear end has all seted up the scarf, the interval evenly is provided with the antislip strip on the cylinder of its supporting wheel, and also be provided with the antislip strip on the inclined plane with the tangent extrusion piece of supporting wheel, can guarantee that the transmission contact is more accurate, thereby when electric cylinder removes, can make the four corners of bearing the weight of the mechanism go up and down simultaneously in step, avoid blocking, can remain the level throughout, be convenient for improve the machining.

The setting of pressure regulating device, through extruding the rubber ball repeatedly, gaseous along rubber tube entering pressure bag makes the pressure increase in the pressure bag, and the valve can carry out the pressure release adjustment to pressure, this simple structure, the simple operation, safe and reliable moreover.

Drawings

FIG. 1 is a front right upper axial view of the present invention.

Fig. 2 is a schematic diagram of the left rear upper axial view structure of the invention.

Fig. 3 is a front right lower axial view of the present invention.

Fig. 4 is a schematic front view of the present invention.

Fig. 5 is a front axial view schematically illustrating the carrying mechanism of the present invention in a state where the top plate is removed.

Fig. 6 is a schematic view of the enlarged portion of fig. 5 of the present invention.

Fig. 7 is a rear-axis view schematically illustrating the carrying mechanism of the present invention in a state where the top plate is removed.

Fig. 8 is a schematic view of the enlarged portion of fig. 7 of the present invention.

In the drawings, the corresponding relationship between the component names and the reference numbers is as follows:

1. a base; 101. a guide plate; 2. a pushing mechanism; 201. an electric cylinder; 202. a guide guard plate; 203. a push block; 204. extruding the block; 3. a lifting mechanism; 301. a lifting column; 302. a tooth hole; 4. a carrying mechanism; 401. cushion blocks; 5. a synchronization mechanism; 501. a synchronizing shaft; 502. a driven gear; 503. a driving gear; 6. a switching mechanism; 601. a vertical rod; 602. engaging teeth; 7. a support mechanism; 701. and supporting the wheels.

Detailed Description

The embodiments of the present invention will be described in further detail with reference to the drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.

In the description of the present invention, "a plurality" means two or more unless otherwise specified; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, e.g., as being fixed or detachable or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example (b):

as shown in figures 1 to 8:

the invention provides a lifting mechanism for avoiding clamping based on mechanical processing workpiece lifting, which comprises a base 1; the middle part of the top plane of the base 1 is longitudinally provided with a pushing mechanism 2; four corners of the top plane of the base 1 are respectively vertically and upwardly fixedly provided with a lifting mechanism 3; the upper ends of the four lifting mechanisms 3 are respectively and fixedly arranged at the four corners of the bottom plane of the horizontal rectangular bearing mechanism 4; the base 1 between the two lifting mechanisms 3 at the left end and the base 1 between the two lifting mechanisms 3 at the right end are respectively and longitudinally provided with a synchronous mechanism 5; the left end and the right end of the synchronizing mechanism 5 are respectively connected with the corresponding lifting mechanisms 3 in a rotating way;

a support mechanism 7 is vertically and downwardly fixedly installed in the middle of the plane at the bottom of the bearing mechanism 4, and a door-shaped conversion mechanism 6 is vertically installed at the root positions of the support mechanism 7 and the bearing mechanism 4; the inner sides of the left end and the right end of the conversion mechanism 6 are respectively and rotatably connected with the lifting mechanisms 3 at corresponding positions; the supporting mechanism 7 corresponds to the pushing mechanism 2 below, and the lower end of the supporting mechanism 7 is abutted against the pushing mechanism 2.

Base 1 includes guide board 101, and the planar left end edge department middle part in base 1 top and right-hand member edge department middle part are perpendicular upwards fixed mounting guide board 101 respectively, and its guide board 101 is half cylindrical structure, and two guide boards 101's interior concave surface is relative.

Wherein the pushing mechanism 2 comprises an electric cylinder 201, a guide guard plate 202, a push block 203 and an extrusion block 204, the electric cylinder 201 is longitudinally and fixedly arranged at the rear end of the top plane of the pushing mechanism 2, the front end of a piston rod of an electric cylinder 201 is fixedly provided with a push block 203, the bottom of the push block 203 is tangent with the top plane of a pushing mechanism 2, the upper end of the push block 203 is fixedly provided with a wedge-shaped extrusion block 204, the front end of the extrusion block 204 is a slope structure inclined towards the front and the lower part, the positions of the pushing mechanism 2 at the left side and the right side of the pushing block 203 are respectively and vertically provided with a guide guard plate 202 connected with the pushing block 203 in a sliding way, the inner side wall of the guide guard plate 202 is provided with a protrusion matched with the push block 203, power can be provided through the transverse electric cylinder 201, direct load of a workpiece above the electric cylinder 201 is reduced, and the service life of the electric cylinder 201 is prolonged.

Wherein, hoist mechanism 3 includes lifting column 301 and tooth hole 302, and equal slidable mounting has lifting column 301 in hoist mechanism 3's the inner chamber, and its lifting column 301's upper end fixed mounting is on the bottom plane of bearing mechanism 4, and the tooth hole 302 has all been seted up to the relative position department in the middle part of hoist mechanism 3, and its tooth hole 302 corresponds with the upper end height of lazytongs 5.

Wherein, bearing mechanism 4 includes cushion 401, and bearing mechanism 4 top planar four corners department all has cushion 401 through four hornblocks fixed mounting that are the rectangle setting, and its four cushion 401 highly uniform can make the work piece place between cushion 401, keeps the level when placing to carry out precision finishing.

Wherein, the lazytongs 5 includes synchronizing shaft 501, driven gear 502 and driving gear 503, synchronizing shaft 501 is vertically installed to the upper end of lazytongs 5, the both ends of synchronizing shaft 501 fixed mounting respectively have driven gear 502, during hoist mechanism 3's tooth hole 302 is arranged in just to its driven gear 502, and with set up some tooth mesh mutually on the lift post 301, synchronizing shaft 501's middle part fixed mounting has driving gear 503, accessible driving gear 503 rotates, drive driven gear 502 rotates, thereby make hoist mechanism 3 go up and down in step, avoid blocking.

Wherein, shifter 6 includes montant 601 and interlock tooth 602, the left end and the right-hand member punishment of shifter 6 bottom plane are vertical downward fixed mounting respectively has montant 601, the position department corresponding with driving gear 503 on the lower extreme cambered surface of its montant 601 is provided with vertical interval arrangement's interlock tooth 602 to montant 601 meshes with driving gear 503 mutually, in addition, the outer end of montant 601 is tangent with the interior cambered surface of guide board 101, accessible shifter 6 gets up the hoist mechanism 3 synchronous linkage of left end and right-hand member, further avoid going up and down to block.

Wherein, supporting mechanism 7 includes supporting wheel 701, and supporting wheel 701 is transversely installed to the lower extreme of supporting mechanism 7, and supporting mechanism 7 of the front end of supporting wheel 701 installation department and rear end has all seted up the scarf joint, and the interval evenly is provided with the antislip strip on its supporting wheel 701's the cylinder, and also is provided with the antislip strip on the inclined plane with the tangent extrusion piece 204 of supporting wheel 701, can guarantee that the transmission contact is more accurate.

The specific use mode and function of the embodiment are as follows:

when the device is used, a workpiece to be precisely machined is firstly placed on the bearing mechanism 4, the four corners of the top plane of the bearing mechanism 4 are fixedly provided with the cushion blocks 401 through the four rectangular corner blocks, and the four cushion blocks 401 are consistent in height, so that the workpiece can be placed between the cushion blocks 401 and kept horizontal during placement, and the precise machining is facilitated;

when lifting is needed, because the rear end of the top plane of the pushing mechanism 2 is longitudinally and fixedly provided with the electric cylinder 201, the front end of the piston rod of the electric cylinder 201 is fixedly provided with the push block 203, the bottom of the push block 203 is tangent to the top plane of the pushing mechanism 2, the upper end of the push block 203 is fixedly provided with the wedge-shaped extrusion block 204, the front end of the extrusion block 204 is of an inclined plane structure inclined towards the front lower part, the positions of the pushing mechanism 2 on the left side and the right side of the push block 203 are respectively and vertically provided with the guide guard plate 202 connected with the push block 203 in a sliding way, the inner side wall of the guide guard plate 202 is provided with the protrusion corresponding to the push block 203, the transverse electric cylinder 201 provides power, the direct load of the upper workpiece on the electric cylinder 201 is reduced, the service life of the electric cylinder 201 is prolonged, the lifting columns 301 are arranged in the inner cavities of the lifting mechanisms 3 in a sliding way, and the upper ends of the lifting, the inner sides of the middle part of the lifting mechanism 3 are provided with tooth holes 302 at opposite positions, the tooth holes 302 correspond to the upper end of the synchronizing mechanism 5 in height, the upper end of the synchronizing mechanism 5 is longitudinally provided with a synchronizing shaft 501, two ends of the synchronizing shaft 501 are respectively and fixedly provided with a driven gear 502, the driven gear 502 is just arranged in the tooth holes 302 of the lifting mechanism 3 and is meshed with teeth arranged on the lifting column 301, the middle part of the synchronizing shaft 501 is fixedly provided with a driving gear 503 which can rotate through the driving gear 503 to drive the driven gear 502 to synchronously lift the lifting mechanism 3 so as to avoid clamping, the left end and the right end of the bottom plane of the matching switching mechanism 6 are respectively and vertically and downwards fixedly provided with vertical rods 601, the lower end arc surface of the vertical rods 601 is provided with meshing teeth 602 which are vertically arranged at intervals at positions corresponding to the driving gear 503, and the vertical rods 601 are meshed with the driving, in addition, the outer end of montant 601 is tangent with the intrados of guide board 101, accessible shifter 6 gets up the hoist mechanism 3 synchronous linkage of left end and right-hand member, further avoid going up and down to block, supporting wheel 701 is transversely installed to the lower extreme of supporting mechanism 7 at last, and the supporting mechanism 7 of the front end of supporting wheel 701 installation department and rear end has all seted up the scarf, the interval evenly is provided with the antislip strip on its supporting wheel 701's the cylinder, and also be provided with the antislip strip on the inclined plane with the tangent extrusion piece 204 of supporting wheel 701, can guarantee that the transmission contact is more accurate.

The embodiments of the present invention have been presented for purposes of illustration and description, and are not intended to be exhaustive or limited to the invention in the form disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiment was chosen and described in order to best explain the principles of the invention and the practical application, and to enable others of ordinary skill in the art to understand the invention for various embodiments with various modifications as are suited to the particular use contemplated.

Claims

1. The utility model provides a promote and avoid hoist mechanism who blocks based on machining work piece promotes which characterized in that: the lifting mechanism for lifting and avoiding clamping based on the machined workpiece comprises a base (1); the middle part of the top plane of the base (1) is longitudinally provided with a pushing mechanism (2); lifting mechanisms (3) are respectively vertically and upwardly fixedly arranged at four corners of the top plane of the base (1); the upper ends of the four lifting mechanisms (3) are respectively and fixedly arranged at four corners of the bottom plane of the horizontal rectangular bearing mechanism (4); a synchronous mechanism (5) is longitudinally arranged on the base (1) between the two lifting mechanisms (3) at the left end and the base (1) between the two lifting mechanisms (3) at the right end respectively; the left end and the right end of the synchronizing mechanism (5) are respectively and rotatably connected with the corresponding lifting mechanisms (3);

a support mechanism (7) is vertically and downwardly fixedly installed in the middle of the bottom plane of the bearing mechanism (4), and a door-shaped conversion mechanism (6) is vertically installed at the root positions of the support mechanism (7) and the bearing mechanism (4); the inner sides of the left end and the right end of the conversion mechanism (6) are respectively and rotatably connected with the lifting mechanism (3) at the corresponding position; the supporting mechanism (7) corresponds to the pushing mechanism (2) below, and the lower end of the supporting mechanism (7) is abutted against the pushing mechanism (2).

The base (1) comprises guide plates (101), the middle part of the edge position of the left end and the middle part of the edge position of the right end of the top plane of the base (1) are respectively and fixedly installed with the guide plates (101) vertically upwards, the guide plates (101) are of a semi-cylindrical structure, and the inner concave surfaces of the two guide plates (101) are opposite;

the pushing mechanism (2) comprises an electric cylinder (201), a guide guard plate (202), a push block (203) and an extrusion block (204), the electric cylinder (201) is longitudinally and fixedly installed at the rear end of the top plane of the pushing mechanism (2), the push block (203) is fixedly installed at the front end of a piston rod of the electric cylinder (201), the bottom of the push block (203) is tangent to the top plane of the pushing mechanism (2), the wedge-shaped extrusion block (204) is fixedly installed at the upper end of the push block (203), the front end of the extrusion block (204) is of an inclined plane structure inclined towards the front lower side, the guide guard plate (202) which is connected with the push block (203) in a sliding mode is vertically arranged at the positions on the left side and the right side of the push block (203) on the pushing mechanism (2), and a protrusion which is matched with the push block (203) is arranged on the inner side wall of the guide guard plate (202;

lifting mechanism (3) are including promoting post (301) and tooth hole (302), equal slidable mounting has promoting post (301) in the inner chamber of lifting mechanism (3), and its upper end fixed mounting who promotes post (301) is on the bottom plane of bearing mechanism (4), and tooth hole (302) have all been seted up to the inboard relative position department in middle part of lifting mechanism (3), and its tooth hole (302) highly corresponds with the upper end of lazytongs (5).

2. The lift mechanism for avoiding seizure based on lifting of a machined workpiece according to claim 1, wherein: the bearing mechanism (4) comprises cushion blocks (401), the four corners of the top plane of the bearing mechanism (4) are fixedly provided with the cushion blocks (401) through four corner blocks which are arranged in a rectangular mode, and the four cushion blocks (401) are identical in height.

3. The lift mechanism for avoiding seizure based on lifting of a machined workpiece according to claim 1, wherein: the synchronous mechanism (5) comprises a synchronous shaft (501), a driven gear (502) and a driving gear (503), the synchronous shaft (501) is longitudinally installed at the upper end of the synchronous mechanism (5), the driven gear (502) is fixedly installed at each of the two ends of the synchronous shaft (501), the driven gear (502) is just arranged in a tooth hole (302) of the lifting mechanism (3) and meshed with teeth arranged on the lifting column (301), and the driving gear (503) is fixedly installed in the middle of the synchronous shaft (501).