CN108856381B - Pulley block transmission type bending machine - Google Patents
Pulley block transmission type bending machine Download PDFInfo
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- CN108856381B CN108856381B CN201810900543.7A CN201810900543A CN108856381B CN 108856381 B CN108856381 B CN 108856381B CN 201810900543 A CN201810900543 A CN 201810900543A CN 108856381 B CN108856381 B CN 108856381B
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- 238000005452 bending Methods 0.000 title claims abstract description 41
- 230000005540 biological transmission Effects 0.000 title claims abstract description 33
- 230000007246 mechanism Effects 0.000 claims abstract description 69
- 238000003825 pressing Methods 0.000 claims abstract description 11
- 230000033001 locomotion Effects 0.000 claims abstract description 10
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 34
- 229910052757 nitrogen Inorganic materials 0.000 claims description 17
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 238000009434 installation Methods 0.000 description 11
- 238000000034 method Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005461 lubrication Methods 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 230000013011 mating Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
- B21D5/01—Bending sheet metal along straight lines, e.g. to form simple curves between rams and anvils or abutments
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H7/00—Gearings for conveying rotary motion by endless flexible members
- F16H7/08—Means for varying tension of belts, ropes, or chains
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H7/00—Gearings for conveying rotary motion by endless flexible members
- F16H7/08—Means for varying tension of belts, ropes, or chains
- F16H2007/0802—Actuators for final output members
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H7/00—Gearings for conveying rotary motion by endless flexible members
- F16H7/08—Means for varying tension of belts, ropes, or chains
- F16H2007/0842—Mounting or support of tensioner
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Transmission Devices (AREA)
- Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
Abstract
The invention provides a pulley block transmission type bending machine. The device comprises an upper workbench, a frame, a side guide mechanism, a chain tensioning mechanism and a chain pulley block transmission mechanism, wherein the side guide mechanism is arranged between the upper workbench and the frame and keeps the movement track of the upper workbench; the side guide mechanism comprises a V-shaped guide rail and a guide unit; the V-shaped guide rail is arranged on the frame, and the guide units are arranged on two sides of the upper workbench; the upper workbench moves up and down under the constraint of the side guide mechanism; the chain tensioning mechanism mainly comprises a ratchet bar, a stop seat, a spring, a pressing plate and a stop block; the chain pulley block transmission mechanism comprises a guide pulley, a chain and a driving device; the guide pulley is connected with the driving device; the chains are wound on the fixed pulleys and the movable pulleys in a staggered way, and are connected with the chain tensioning mechanism. The invention has simple structure and even force transmission, improves the bending precision and stability of the bending machine and reduces the production cost.
Description
Technical Field
The invention relates to the technical field of special equipment manufacturing, in particular to a pulley block transmission type bending machine.
Background
The bending machine is used as machining equipment, and has the main function of bending metal plates into various required shapes, and is key equipment for sheet metal machining in the manufacturing industry.
Conventional bending machines have two main forms: one is driven by an electrohydraulic system, and the upper workbench is directly driven by an oil cylinder to reciprocate, as shown in figure 1; the second type is a traditional pulley bending machine, and the upper workbench is driven to reciprocate through a pulley block structure.
The electro-hydraulic system bending machine in the traditional form has the following problems:
the oil cylinders are generally distributed in the two frames, so that the main pressure generated by the upper workbench is distributed on the two sides of the frame, and deflection deformation of the upper workbench caused by load pressure is difficult to overcome, so that the bending precision of a workpiece is not ensured;
the conventional pulley bending machine has the following problems:
(1) The lifting power of the workbench is provided by a spring, the lifting speed is uncontrollable, and the stability is poor;
(2) The energy accumulated by the upper top of the spring is stored in the pressing process of the upper workbench, so that the equipment has additional energy consumption;
(3) 2 motors are adopted for driving, the structure is complex, and the economical efficiency is poor.
In view of the foregoing, there is a great need for a pulley-block-driven bending machine to solve the problems in the prior art.
Disclosure of Invention
The invention aims to provide a pulley block transmission type bending machine, which is used for improving the bending precision and stability of the bending machine and reducing the production cost.
In order to achieve the above purpose, the invention provides a pulley block transmission type bending machine, which comprises an upper workbench, a machine frame, a side guide mechanism, a chain tensioning mechanism and a chain pulley block transmission mechanism, wherein the side guide mechanism is arranged between the upper workbench and the machine frame and keeps the movement track of the upper workbench, the chain tensioning mechanism is arranged on the machine frame, and the chain pulley block transmission mechanism is connected with the upper workbench and the machine frame and transmits driving force to the upper workbench.
The upper workbench is a rectangular plate and is vertically arranged.
The side guide mechanism comprises a V-shaped guide rail and a guide unit; the V-shaped guide rail is arranged on the frame, and the guide units are arranged on two sides of the upper workbench; the upper workbench moves up and down under the constraint of the side guide mechanism.
The chain tensioning mechanism mainly comprises a ratchet bar, a stop seat, a spring, a pressing plate and a stop block; through holes suitable for the stop blocks are formed in two sides of the stop seat; the pressing plates are arranged on two side surfaces of the stop seat and seal through holes on two sides of the stop seat; the spring is arranged in the through hole of the stop seat, one end of the spring is limited by the pressing plate, and the other end of the spring is connected with the end face of the stop block; the other end face of the stop block is provided with a ratchet meshed with the ratchet bar.
The chain pulley block transmission mechanism comprises a guide pulley, a chain and a driving device; the guide pulley is connected with the driving device; the guide pulleys are in a plurality of and even number, are arranged in four rows, and the first and the fourth fixed pulleys are arranged on the frame; the second and third movable pulleys are arranged on the upper workbench; the chains are wound on the fixed pulleys and the movable pulleys in a staggered way, and are connected with the chain tensioning mechanism.
Preferably, the guiding unit comprises a guiding seat, a roller bearing and a bearing screw; the guide seat comprises a flat plate part and a convex part which is positioned at the edge of the flat plate part and is vertical to the flat plate part; the inner side of the convex part, which is close to the flat plate part, is provided with a wedge matching surface, and the outer side of the convex part is provided with two inclined bearing mounting surfaces; the roller bearings are arranged on the bearing mounting surface of the guide seat in pairs through bearing screws.
Preferably, the guide unit further comprises a wedge block for adjusting the installation clearance between the convex part of the guide seat and the side edge of the upper workbench, and the wedge block is connected with the guide seat flat plate part through a bolt; the wedge block is provided with a guide seat matching surface, and the guide seat matching surface and the wedge block matching surface are all inclined and equal in inclination.
Preferably, the chain tensioning mechanism further comprises a mounting seat, a nitrogen spring, a guide post and a chain connector; the mounting seat board is provided with a first flange at a position above the surface of the mounting seat board; the mounting seat board is provided with a second flange at a position below the mounting seat board surface; the second flange is provided with a guide hole; the stop seat is provided with a groove matched with the first flange and is arranged on the mounting seat; the nitrogen spring is arranged on the second flange; the guide post passes through the guide hole on the second flange, one end of the guide post is fixed with the ratchet bar, and the other end of the guide post is fixed with the chain connector; the chain connector is connected with a chain.
Preferably, the method is characterized in that, the stop blocks are at least provided with two pairs. The stop block is of a cylindrical structure, the outer diameter of the stop block is matched with the size of the through hole in the stop seat, and the end face of the stop block is provided with ratchets matched with the ratchets.
Preferably, the stop seat is shaped like a door, and the ratchet bar is shaped like a T; the concave part of the stop seat is matched with the convex part of the ratchet bar.
Preferably, the driving device comprises a motor, a driving sprocket shaft and a driven sprocket shaft; an output shaft of the motor is connected with a driving chain wheel shaft; the driving chain wheel shaft and the driven chain wheel shaft are respectively connected with the middle two guide pulleys of the first row; gears are arranged on the driving chain wheel shaft and the driven chain wheel shaft, and the two gears are meshed with each other to drive the driven chain wheel shaft to rotate.
Preferably, the guide pulley is a sprocket meshed with the chain, and the fixed pulley and the movable pulley are staggered and spaced from each other, i.e. the movable pulley corresponds to a gap position between the two fixed pulleys.
Preferably, the two chains are wound on the left half guide pulley and the right half guide pulley respectively.
Preferably, one end of the chain is fixedly connected with a chain connector of the chain tensioning mechanism, the chain is in a serpentine shape and is staggered and wound on the first row of fixed pulleys and the second row of fixed pulleys, when the chain winds to the middle of the first row, the chain downwards winds on the fourth row of fixed pulleys and then backwards winds on the third row of fixed pulleys, the chain continuously takes a serpentine shape and is staggered and wound on the fourth row of fixed pulleys and the third row of fixed pulleys, and the tail end of the chain and the fixed seat are mounted on the frame to form a semi-closed loop.
The technical scheme of the invention has the following beneficial effects:
(1) In the invention, the side guide mechanism consists of the roller bearing, the V-shaped guide rail, the wedge block, the guide seat and the like, and has small appearance volume and compact structure; under the condition of limited installation space, the installation and adjustment of the guide mechanism can be realized from the front surface of the workbench. Compared with the traditional mode, the V-shaped guide structure formed by the roller bearing can bear huge overturning force generated during the reciprocating motion of the upper workbench, lubrication is not needed, and the requirement on the use environment is not high. The upper workbench is restrained by the guide mechanism during the operation of the equipment, so that the bending process is stable, and the bending precision is ensured. The gap between the guide seat and the upper workbench is adjustable, and when the front-back distance between the guide seat and the wedge is adjusted by a screw, the gap between the roller bearing and the V-shaped guide rail can be adjusted; the upper workbench can reciprocate up and down through the guide of the V-shaped guide rail and the roller bearing. The gap adjusting structure formed by the wedge blocks and the guide seats is more beneficial to the installation and debugging of the guide mechanisms, and can avoid the phenomenon of blocking or unsmooth movement when the upper workbench reciprocates.
(2) The chain tensioning mechanism comprises the nitrogen spring, the stop block, the ratchet and the like, has small appearance volume, compact structure and small installation space, is safe and reliable in working, and realizes automatic tensioning of the chain through the nitrogen spring, the stop block and the check mechanism formed by the ratchet bar. The stop block and the ratchet bar form a check mechanism, the stop block is meshed with two sides of the ratchet bar under the tension action of the spring, the ratchet bar can only move unidirectionally, and the chain after tensioning can be prevented from loosening. The nitrogen spring is in a compression state initially, the nitrogen spring has a trend of upward movement due to self tension, the ratchet bar is connected with the chain connector through the guide post, and the chain connector is connected with an external chain, so that the chain oil has a trend of upward pulling, and the aim of tensioning the chain is fulfilled; the nitrogen spring has small volume, large elasticity, long travel, stable work, precise manufacture and long service life.
(3) In the invention, the chain pulley block transmission mechanism consists of the guide pulley, the chains, the motors and the like, and the single motor drives the two chains to move through the driving chain wheel shaft and the driven chain wheel shaft simultaneously; the upper workbench moves up and down under the constraint of the guide device, so that the guide is accurate, stable and reliable. The motor is connected with a driving chain wheel shaft, and the driving chain wheel shaft drives the driven chain wheel shaft to rotate through gear transmission. When the motor rotates clockwise, the left driving chain wheel shaft drives the chain to move downwards, the upper half part of the chain is shortened, and the lower half part of the chain is lengthened; simultaneously, the driven sprocket shaft on the right side rotates anticlockwise under the meshing effect of gear transmission, the upper half part of the chain is shortened, and the lower half part of the chain is lengthened, so that the upper workbench is driven to ascend. Conversely, when the motor rotates anticlockwise, the upper workbench is driven to descend. The lifting and descending of the upper workbench are controlled by the driving of a single motor, and the reciprocating speed of the upper workbench can be controlled due to the controllability of the motor speed, so that the stability of equipment operation is high.
In addition to the objects, features and advantages described above, the present invention has other objects, features and advantages. The present invention will be described in further detail with reference to the drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiments of the invention and together with the description serve to explain the invention. In the drawings:
FIG. 1 is an exploded view of a bending machine;
fig. 2 is a front view of the bending machine with the upper table removed;
fig. 3 is a left side view of the bending machine;
fig. 4 is a top view of the bending machine;
FIG. 5 is an exploded view of the side guide mechanism;
FIG. 6 is an enlarged view of a portion of the side guide mechanism;
FIG. 7 is a part view of a guide shoe;
FIG. 8 is an exploded view of the chain tensioning mechanism;
FIG. 9 is a front view of the chain tensioning mechanism;
fig. 10 is a left side view of the chain tensioning mechanism.
Wherein 1, upper table, 2, frame, 3, side guiding mechanism, 3.1, V-shaped guide rail, 3.2, guiding unit, 4, chain tensioning mechanism, 4.1, ratchet bar, 4.2, stop seat, 4.3, spring, 4.4, clamp plate, 4.5, stop block, 4.6, mount seat, 4.6.1, first flange, 4.6.2, second flange, 4.7, nitrogen spring, 4.8, guide post, 4.9, chain connector, 5, chain pulley block transmission mechanism, 5.1, guide pulley, 5.2, chain, 5.3, driving device, 5.3.1, motor, 5.3.2, driving sprocket shaft, 5.3.3, driven sprocket shaft, 6, guide seat, 6.1, flat plate portion, 6.2, boss portion, 6.2.1 wedge mating face, 6.2.2, bearing mounting face, 7, roller bearing, 8, bearing, 9, wedge, 9.1, guide seat mating face.
Detailed Description
Embodiments of the invention are described in detail below with reference to the attached drawings, but the invention can be implemented in a number of different ways, which are defined and covered by the claims.
Example 1:
referring to fig. 1 to 10, a pulley block transmission type bending machine includes an upper table 1, a frame 2, a side guide mechanism 3 interposed between the upper table 1 and the frame 2 and maintaining a movement locus of the upper table 1, a chain tensioning mechanism 4 mounted on the frame 2, and a chain pulley block transmission mechanism 5 connecting the upper table 1 and the frame 2 and transmitting a driving force to the upper table 1.
The upper workbench 1 is a rectangular plate and is vertically arranged; the side guide mechanism 3 comprises a V-shaped guide rail 3.1 and a guide unit 3.2; the V-shaped guide rail 3.1 is arranged on the frame 2, and the guide units 3.2 are arranged on two sides of the upper workbench 1; the upper table 1 moves up and down under the constraint of the side guide mechanism 3.
The guide unit 3.2 comprises a guide seat 6, a roller bearing 7 and a bearing screw 8; the guide seat 6 comprises a flat plate part 6.1 and a convex part 6.2 which is positioned at the edge of the flat plate part 6.1 and is perpendicular to the flat plate part 6.1; the inner side of the bulge part 6.2 close to the flat plate part 6.1 is provided with a wedge matching surface 6.2.1, and the outer side of the bulge part 6.2 is provided with two inclined bearing mounting surfaces 6.2.2; the roller bearings 7 are arranged on the bearing mounting surfaces 6.2.2 of the guide seat in pairs by bearing screws 8.
The guide unit 3.2 further comprises a wedge 9 used for adjusting the installation clearance between the protruding part 6.2 of the guide seat and the side edge of the upper workbench 1, and the wedge 9 is connected with the guide seat flat plate part 6.1 through bolts; the wedge 9 is provided with a guide seat matching surface 9.1, and the guide seat matching surface 9.1 and the wedge matching surface 6.2.1 are respectively provided with a slope, and the slopes are equal.
The chain tensioning mechanism 4 mainly comprises a ratchet bar 4.1, a stop seat 4.2, a spring 4.3, a pressing plate 4.4 and a stop block 4.5; two sides of the stop seat 4.2 are provided with through holes suitable for the stop blocks 4.5; the pressing plates 4.4 are arranged on two side surfaces of the stop seat 4.2 and seal through holes on two sides of the stop seat 4.2; the spring 4.3 is arranged in the through hole of the stop seat 4.2, one end of the spring 4.3 is limited by the pressing plate, and the other end is connected with the end face of the stop block 4.5; the other end surface of the stop block 4.5 is provided with a ratchet meshed with the ratchet bar 4.1;
the chain tensioning mechanism 4 further comprises an installation seat 4.6, a nitrogen spring 4.7, a guide post 4.8 and a chain connector 4.9; the upper surface of the mounting seat 4.6 is provided with a first flange 4.6.1; the mounting seat 4.6 is provided with a second flange 4.6.2 at a position with a lower plate surface; the second flange 4.6.2 is provided with a guide hole; the stop seat 4.2 has a recess matching the first flange 4.6.1, the stop seat 4.2 being mounted on the mounting seat 4.6; the nitrogen spring 4.7 is mounted on the second flange 4.6.2; the guide post 4.8 passes through a guide hole on the second flange 4.6.2, one end of the guide post is fixed with the ratchet bar 4.1, and the other end of the guide post is fixed with the chain connector 4.9; the chain connector 4.9 is connected with the chain 5.2.
At least two pairs of stop blocks 4.5 are provided. The stop block 4.5 is of a cylindrical structure, the outer diameter of the stop block 4.5 is matched with the size of a through hole in the stop seat 4.2, and the end face of the stop block 4.5 is provided with ratchets matched with the ratchet bar 4.1.
The stop seat 4.2 is shaped like a door, and the ratchet bar 4.1 is shaped like a T; the concave part of the stop seat 4.2 is matched with the convex part of the ratchet bar 4.1.
The chain pulley block transmission mechanism 5 comprises a guide pulley 5.1, a chain 5.2 and a driving device 5.3; the guide pulley 5.1 is connected with the driving device 5.3; the guide pulleys 5.1 are a plurality of even number and are arranged in four rows, and the first and the fourth fixed pulleys are arranged on the frame 2; the second and third movable pulleys are arranged on the upper workbench 1; the chain 5.2 is wound on the fixed pulley and the movable pulley in a staggered way, and the chain 5.2 is connected with the chain tensioning mechanism 4;
the driving device 5.3 comprises a motor 5.3.1, a driving sprocket shaft 5.3.2 and a driven sprocket shaft 5.3.3; an output shaft of the motor 5.3.1 is connected with the driving chain wheel shaft 5.3.2; the driving chain wheel shaft 5.3.2 and the driven chain wheel shaft 5.3.3 are respectively connected with the middle two guide pulleys 5.1 of the first row; gears are arranged on the driving sprocket shaft 5.3.2 and the driven sprocket shaft 5.3.3, and the two gears are meshed with each other to drive the driven sprocket shaft 5.3.3 to rotate.
The guide pulley 5.1 is a chain wheel meshed with the chain 5.2, and the fixed pulleys and the movable pulleys are staggered and spaced, namely the movable pulleys are corresponding to the gap positions between the two fixed pulleys. The two chains 5.2 are respectively wound on the left half guide pulley and the right half guide pulley. One end of the chain 5.2 is fixedly connected with the chain connector 4.9 of the chain tensioning mechanism 4, the chain 5.2 is in a serpentine shape, the chain is staggered and wound on the first row of fixed pulleys and the second row of fixed pulleys, when the chain winds to the middle of the first row, the chain downwards winds on the fourth row of fixed pulleys and then backwards winds on the third row of fixed pulleys, the chain continuously takes a serpentine shape, the chain 5.2 is staggered and wound on the fourth row of fixed pulleys and the third row of fixed pulleys, and the tail end of the chain 5.2 and the fixed seat are installed on the frame 2 to form a semi-closed loop.
Above-mentioned assembly pulley transmission formula bender theory of operation: the chain tensioning mechanism enables the chain to be in a tensioning state all the time, and the upper workbench is driven by the motor to reciprocate through the chain pulley block transmission mechanism, and the upper workbench always moves along the vertical direction due to the constraint of the side guiding mechanism. The bottom end of the upper workbench is provided with a cutter, a workpiece is placed on the workbench, and the upper workbench moves downwards to generate a downward pressure, so that the processing and forming of the workpiece can be completed.
In the pulley block transmission type bending machine, the side guide mechanism consists of the roller bearing, the V-shaped guide rail, the wedge block, the guide seat and the like, and has small appearance volume and compact structure; under the condition of limited installation space, the installation and adjustment of the guide mechanism can be realized from the front surface of the workbench. Compared with the traditional mode, the V-shaped guide structure formed by the roller bearing can bear huge overturning force generated during the reciprocating motion of the upper workbench, lubrication is not needed, and the requirement on the use environment is not high. The upper workbench is restrained by the guide mechanism during the operation of the equipment, so that the bending process is stable, and the bending precision is ensured. The gap between the guide seat and the upper workbench is adjustable, and when the front-back distance between the guide seat and the wedge is adjusted by a screw, the gap between the roller bearing and the V-shaped guide rail can be adjusted; the upper workbench can reciprocate up and down through the guide of the V-shaped guide rail and the roller bearing. The gap adjusting structure formed by the wedge blocks and the guide seats is more beneficial to the installation and debugging of the guide mechanisms, and can avoid the phenomenon of blocking or unsmooth movement when the upper workbench reciprocates.
In the pulley block transmission type bending machine, the chain tensioning mechanism is composed of the nitrogen spring, the stop block, the ratchet and the like, the appearance volume is small, the structure is compact, the installation space is small, the pulley block transmission type bending machine is safe and reliable in operation, and the automatic tensioning of the chain is realized through the nitrogen spring, the stop block and the check mechanism composed of the ratchet bar. The stop block and the ratchet bar form a check mechanism, the stop block is meshed with two sides of the ratchet bar under the tension action of the spring, the ratchet bar can only move unidirectionally, and the chain after tensioning can be prevented from loosening. The nitrogen spring is in a compression state initially, the nitrogen spring has a trend of upward movement due to self tension, the ratchet bar is connected with the chain connector through the guide post, and the chain connector is connected with an external chain, so that the chain oil has a trend of upward pulling, and the aim of tensioning the chain is fulfilled; the nitrogen spring has small volume, large elasticity, long travel, stable work, precise manufacture and long service life.
In the pulley block transmission type bending machine, the chain pulley block transmission mechanism is composed of the guide pulleys, the chains, the motors and the like, and a single motor drives two chains to move through the driving chain wheel shaft and the driven chain wheel shaft simultaneously; the upper workbench moves up and down under the constraint of the guide device, so that the guide is accurate, stable and reliable. The motor is connected with a driving chain wheel shaft, and the driving chain wheel shaft drives the driven chain wheel shaft to rotate through gear transmission. When the motor rotates clockwise, the left driving chain wheel shaft drives the chain to move downwards, the upper half part of the chain is shortened, and the lower half part of the chain is lengthened; simultaneously, the driven sprocket shaft on the right side rotates anticlockwise under the meshing effect of gear transmission, the upper half part of the chain is shortened, and the lower half part of the chain is lengthened, so that the upper workbench is driven to ascend. Conversely, when the motor rotates anticlockwise, the upper workbench is driven to descend. The lifting and descending of the upper workbench are controlled by the driving of a single motor, and the reciprocating speed of the upper workbench can be controlled due to the controllability of the motor speed, so that the stability of equipment operation is high.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The pulley block transmission type bending machine is characterized by comprising an upper workbench (1), a frame (2), a side guide mechanism (3) which is arranged between the upper workbench (1) and the frame (2) and keeps the movement track of the upper workbench (1), a chain tensioning mechanism (4) arranged on the frame (2) and a chain pulley block transmission mechanism (5) which is connected with the upper workbench (1) and the frame (2) and transmits the driving force to the upper workbench (1);
the upper workbench (1) is a rectangular plate and is vertically arranged;
the side guide mechanism (3) comprises a V-shaped guide rail (3.1) and a guide unit (3.2); the V-shaped guide rail (3.1) is arranged on the frame (2), and the guide units (3.2) are arranged on two sides of the upper workbench (1); the upper workbench (1) moves up and down under the constraint of the side guide mechanism (3);
the chain tensioning mechanism (4) mainly comprises a ratchet bar (4.1), a stop seat (4.2), a spring (4.3), a pressing plate (4.4) and a stop block (4.5); two sides of the stop seat (4.2) are provided with through holes suitable for the stop blocks (4.5); the pressing plates (4.4) are arranged on two side surfaces of the stop seat (4.2) to seal through holes on two sides of the stop seat (4.2); the spring (4.3) is arranged in the through hole of the stop seat (4.2), one end of the spring (4.3) is limited by the pressing plate, and the other end of the spring is connected with the end face of the stop block (4.5); the other end surface of the stop block (4.5) is provided with a ratchet meshed with the ratchet bar (4.1);
the chain pulley block transmission mechanism (5) comprises a guide pulley (5.1), a chain (5.2) and a driving device (5.3); the guide pulley (5.1) is connected with the driving device (5.3); the guide pulleys (5.1) are a plurality of even number and are arranged in four rows, and the first and the fourth fixed pulleys are arranged on the frame (2); the second and third movable pulleys are arranged on the upper workbench (1); the chain (5.2) is wound on the fixed pulley and the movable pulley in a staggered way, and the chain (5.2) is connected with the chain tensioning mechanism (4).
2. Pulley-block-driven bending machine according to claim 1, characterized in that the guiding unit (3.2) comprises a guiding seat (6), a roller bearing (7), a bearing screw (8); the guide seat (6) comprises a flat plate part (6.1) and a protruding part (6.2) which is positioned at the edge of the flat plate part (6.1) and is perpendicular to the flat plate part (6.1); the inner side of the convex part (6.2) close to the flat plate part (6.1) is provided with a wedge matching surface (6.2.1), and the outer side of the convex part (6.2) is provided with two inclined bearing mounting surfaces (6.2.2); the roller bearings (7) are arranged on the bearing mounting surfaces (6.2.2) of the guide seats in pairs by bearing screws (8).
3. A pulley-block-driven bending machine according to claim 1 or 2, characterized in that the guiding unit (3.2) further comprises a wedge (9) for adjusting the mounting gap between the raised portion (6.2) of the guiding shoe and the side edge of the upper table (1), the wedge (9) being connected to the guiding shoe plate portion (6.1) by means of bolts; the wedge block (9) is provided with a guide seat matching surface (9.1), and the guide seat matching surface (9.1) and the wedge block matching surface (6.2.1) are all inclined and equal in inclination.
4. Pulley-block-driven bending machine according to claim 1, characterized in that the chain tensioning mechanism (4) further comprises a mounting seat (4.6), a nitrogen spring (4.7), a guide post (4.8), a chain connector (4.9); the upper surface of the mounting seat (4.6) is provided with a first flange (4.6.1); the mounting seat (4.6) is provided with a second flange (4.6.2) at the position of the lower plate surface; the second flange (4.6.2) is provided with a guide hole; the stop seat (4.2) is provided with a groove matched with the first flange (4.6.1), and the stop seat (4.2) is arranged on the mounting seat (4.6); a nitrogen spring (4.7) is mounted on the second flange (4.6.2); the guide post (4.8) passes through a guide hole on the second flange (4.6.2), one end of the guide post is fixed with the ratchet bar (4.1), and the other end of the guide post is fixed with the chain connector (4.9); the chain connector (4.9) is connected with the chain (5.2).
5. Pulley-block-driven bending machine according to claim 1 or 4, characterized in that the stop blocks (4.5) are provided in at least two pairs, the stop blocks (4.5) are of cylindrical structure, the outer diameter of the stop blocks (4.5) is adapted to the size of the through holes in the stop seat (4.2), and the end faces of the stop blocks (4.5) are provided with ratchet teeth matched with the ratchet bars (4.1).
6. Pulley-block-driven bending machine according to claim 1 or 4, characterized in that the stop seat (4.2) is "door" -shaped and the ratchet bar (4.1) is "T" -shaped; the concave part of the stop seat (4.2) is matched with the convex part of the ratchet bar (4.1).
7. A pulley-driven bending machine according to claim 1, characterized in that the driving means (5.3) comprise a motor (5.3.1) and a driving sprocket shaft (5.3.2), a driven sprocket shaft (5.3.3); an output shaft of the motor (5.3.1) is connected with a driving chain wheel shaft (5.3.2); the driving chain wheel shaft (5.3.2) and the driven chain wheel shaft (5.3.3) are respectively connected with the two guide pulleys (5.1) in the middle of the first row; gears are arranged on the driving chain wheel shaft (5.3.2) and the driven chain wheel shaft (5.3.3), and the two gears are meshed with each other to drive the driven chain wheel shaft (5.3.3) to rotate.
8. Pulley block transmission type bending machine according to claim 1, characterized in that the guiding pulley (5.1) is a sprocket wheel meshed with the chain (5.2), and the fixed pulley and the movable pulley are arranged in a staggered manner, i.e. the movable pulley corresponds to a gap position between the two fixed pulleys.
9. Pulley-block-driven bending machine according to claim 1, characterized in that the two chains (5.2) are wound around the left-half and right-half guide pulleys, respectively.
10. Pulley block transmission type bending machine according to claim 1, characterized in that one end of the chain (5.2) is fixedly connected with a chain connector (4.9) of the chain tensioning mechanism (4), the chain (5.2) is in a serpentine shape and is wound on the first row fixed pulley and the second movable pulley in a staggered manner, when the chain is wound to the middle position of the first row, the chain is wound downwards on the fourth row fixed pulley and then is wound back on the third movable pulley, the chain continues to be in a serpentine shape and is wound on the fourth row fixed pulley and the third movable pulley in a staggered manner, and the tail end of the chain (5.2) and the fixed seat are mounted on the frame (2) to form a semi-closed loop.
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| CN201810900543.7A CN108856381B (en) | 2018-08-09 | 2018-08-09 | Pulley block transmission type bending machine |
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| CN201810900543.7A CN108856381B (en) | 2018-08-09 | 2018-08-09 | Pulley block transmission type bending machine |
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| CN108856381B true CN108856381B (en) | 2024-02-02 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109807273B (en) * | 2019-03-15 | 2020-04-07 | 浙江苒晟信息科技有限公司 | Mechanical press |
| CN109807275B (en) * | 2019-03-15 | 2020-04-10 | 嵊州市前新机械有限公司 | Two-way forging press |
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| CN108856381A (en) | 2018-11-23 |
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