CN106757844A - A kind of sewing machine and its vibration-proof structure - Google Patents
A kind of sewing machine and its vibration-proof structure Download PDFInfo
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- CN106757844A CN106757844A CN201611236771.6A CN201611236771A CN106757844A CN 106757844 A CN106757844 A CN 106757844A CN 201611236771 A CN201611236771 A CN 201611236771A CN 106757844 A CN106757844 A CN 106757844A
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- China
- Prior art keywords
- connecting rod
- rotating shaft
- sewing machine
- suture needle
- balance block
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- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B55/00—Needle holders; Needle bars
- D05B55/14—Needle-bar drives
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Sewing Machines And Sewing (AREA)
Abstract
The present invention relates to a kind of vibration-proof structure of sewing machine, suture needle connecting rod pumps perpendicular to upper rotating shaft and by the connecting lever driving being connected in upper rotating shaft, so, suture needle connecting rod and connecting lever can produce inertia force along the vertical direction and act in rotating shaft, due to being connected with spindle balance block in upper rotating shaft；The inertia force that upper spindle balance block is produced is in opposite direction with the inertia force that the original part of sewing machine is produced；So, the inertia force that upper spindle balance block is produced can offset the inertia force that suture needle connecting rod and connecting lever are acted in rotating shaft, so as to reduce vibration and the noise of sewing machine, reduce the abrasion that moving parts move vice division chief, improve the operating environment of operating personnel.
Description
Technical field
The present invention relates to a kind of sewing machine and its vibration-proof structure, more particularly to a kind of industrial sewing machine and its vibration damping knot
Structure.
Background technology
Sewing machine is widely used in the processing occasion such as garment production, fabrics, packaging.With industrial expansion, sewing machine
Production efficiency more and more higher, there is a fairly large number of fortune inside industrial sewing machine in the sewing velocity of sewing machine also more and more higher
Dynamic component, its own center of gravity position is focused on by the quality of each moving component, and center of gravity is also often referred to as barycenter, machine
When device runs at high speed, the position generating period change spatially of above-mentioned particle, and because movement velocity is very fast, unavoidably
Ground will produce larger inertia force；On the one hand, these inertia force are ultimately applied to machine by drive disk assembly (such as connecting rod, connecting lever)
On frame, whole machine is set to show as violent vibration；On the other hand, these inertia force will simultaneously form resultant couple, i.e. moment of inertia, make
Machine has the trend toppled, and can equally increase the vibration of machine.This vibration can not only produce ear-piercing noise, can also aggravate fortune
The abrasion of dynamic part movement vice division chief, influences machine operation precision and reliability, the physical and mental health to operating personnel to cause damage.
The content of the invention
The shortcoming of prior art in view of the above, it is an object of the invention to provide a kind of sewing machine and its vibration damping knot
Structure, can reduce the vibration of sewing machine.
To achieve the above object, the present invention provides a kind of vibration-proof structure of sewing machine, adopts the following technical scheme that：One
The vibration-proof structure of sewing machine, including upper rotating shaft and suture needle connecting rod are planted, suture needle connecting rod is connected in upper rotating shaft, upper rotating shaft
There is connecting lever, axle connecting rod is hinged with connecting lever, the lower end of upper axle connecting rod is hinged in the suture needle connecting rod, sewing machine work
When, upper rotating shaft drives connecting lever to rotate, so as to drive suture needle connecting rod to pump；Upper spindle balance is connected in the upper rotating shaft
Block, when suture needle connecting rod is moved downward to minimum point, the axle center of the barycenter higher than upper rotating shaft of the upper spindle balance block；Work as suture needle
When connecting rod is moved upward to peak, the axle center of the barycenter less than upper rotating shaft of the upper spindle balance block.
Preferably, when suture needle connecting rod is moved downward to minimum point, the barycenter of the upper spindle balance block is in upwards partially
The state for turning；When suture needle connecting rod is moved upward to peak, the barycenter of the upper spindle balance block is in the shape for deflecting down
State.
Preferably, when suture needle connecting rod is moved downward to minimum point, the barycenter of the upper spindle balance block is higher than upper rotating shaft
Axle center, and angle between line and vertical direction between upper spindle balance block and the axle center of upper rotating shaft is 0-30 degree.
Preferably, when suture needle connecting rod is moved upward to peak, the barycenter of the upper spindle balance block is less than upper rotating shaft
Axle center, and angle between line and vertical direction between upper spindle balance block and the axle center of upper rotating shaft is 0-30 degree.
Preferably, the upper spindle balance block is on the connecting lever, and connecting lever is provided with the second jointed shaft, the upper axle connecting rod it is upper
End is hinged on second jointed shaft, and upper spindle balance block and the second jointed shaft are respectively positioned at the axle center both sides of upper rotating shaft.
It is highly preferred that the connecting lever is provided with a secter pat, upper spindle balance block is removably wrapped on the secter pat.
It is highly preferred that the upper spindle balance block is structure as a whole with connecting lever.
With a kind of vibration-proof structure of sewing machine of the invention correspondingly, the present invention also provides a kind of sewing machine, using as follows
Technical scheme：A kind of sewing machine, including above-mentioned technical proposal or the sewing machine described in its any preferred technical scheme vibration damping
Structure.
As described above, a kind of vibration-proof structure of sewing machine of the present invention, has the advantages that：Of the invention one
Plant in the vibration-proof structure of sewing machine, suture needle connecting rod is perpendicular to upper rotating shaft and upper and lower by the connecting lever driving being connected in upper rotating shaft
Move back and forth, so, suture needle connecting rod and connecting lever can produce inertia force along the vertical direction and act in rotating shaft, due to
Spindle balance block is connected with upper rotating shaft；When suture needle connecting rod is moved downward to minimum point, suture needle connecting rod and connecting lever are acted on
Inertia force in upper rotating shaft has larger component vertically downward, and now goes up the barycenter of spindle balance block higher than upper rotating shaft
Axle center, the inertia force that upper spindle balance block is produced is acted in rotating shaft and with component vertically upward；When suture needle connecting rod to
On when being moved to peak, the inertia force that suture needle connecting rod and connecting lever are acted in rotating shaft have it is larger vertically upward point
Amount, and the axle center of the barycenter less than upper rotating shaft of spindle balance block is now gone up, the inertia force that upper spindle balance block is produced acts on rotating shaft
Above and with component vertically downward；So, the inertia force that upper spindle balance block is produced can offset suture needle connecting rod and connecting lever is made
With the inertia force in upper rotating shaft, so as to reduce vibration and the noise of sewing machine, reduce the abrasion that moving parts move vice division chief, change
The operating environment of kind operating personnel.
Brief description of the drawings
The stereochemical structure of motion and the balance weight being connected on motion that Fig. 1 is shown as sewing machine is illustrated
Figure；
The front view of the motion of the sewing machine that Fig. 2 is shown as in Fig. 1 and the balance weight being connected on motion；
Fig. 3 is shown as the part such as the suture needle connecting rod of F directions observation, upper axle connecting rod, connecting lever and upper spindle balance block from Fig. 2
Connection diagram；
Fig. 4 is shown as the generalized section at A-A in Fig. 2, only shows the parts such as lower axle connecting rod, rotating disk；
Fig. 5 is shown as upper rotating shaft from the positive apparent direction observation in Fig. 2, lower axle connecting rod, driven rocking bar, power transmission shaft and additional
The attachment structure schematic diagram of balance weight；
Fig. 6 is shown as looper connecting rod, drive rocker, power transmission shaft and the additional equilibrium observed from the positive apparent direction in Fig. 2
The attachment structure schematic diagram of block；
The inertia force direction that Fig. 7 is shown as the motion of sewing machine and the balance weight that is connected on motion is produced
Schematic diagram；
Fig. 8 is shown as the parameter schematic diagram of balance weight；
Fig. 9 is shown as the whole machine of the vibration-proof structure of a kind of sewing machine of the invention, upper spindle balance block, lower axle balance weight, attached
Plus balance weight is in the phase schematic diagram of the inertia force component of vertical direction；
Figure 10 is shown as the phase schematic diagram of whole machine, upper spindle balance block in the inertia force component of vertical direction；
Figure 11 is shown as the phase schematic diagram of whole machine, lower axle balance weight in the inertia force component of vertical direction；
Figure 12 is shown as the phase schematic diagram of whole machine, additional counterweight in the inertia force component of vertical direction；
Figure 13 is shown as the phase schematic diagram of whole machine, additional counterweight in the inertia force along looper connecting rod axis direction；
Description of reference numerals
The sphere hinge hole of rotating shaft 12 on 1
The driven rocking bar of 2 lower rotary shaft 13
The sphere articulated joint of 3 power transmission shaft 14
The drive rocker of 4 suture needle connecting rod 15
The drive block of 5 looper connecting rod 16
The stop block of spindle balance block 17 on 6
Axle connecting rod on 7 lower axle balance weights 18
The secter pat of 8 additional counterweight 19
The connecting lever of 9 terminal pad 20
The jointed shaft of 10 first jointed shaft 21 second
11 lower axle connecting rods
Specific embodiment
Embodiments of the present invention are illustrated by particular specific embodiment below, those skilled in the art can be by this explanation
Content disclosed by book understands other advantages of the invention and effect easily.
It should be clear that structure, ratio, size depicted in this specification institute accompanying drawings etc., is only used to coordinate specification to be taken off
The content shown, so that those skilled in the art understands and reads, is not limited to enforceable qualifications of the invention, therefore
Do not have technical essential meaning, the modification of any structure, the change of proportionate relationship or the adjustment of size are not influenceing the present invention
Under the effect that can be generated and the purpose to be reached, all should still fall obtain the model that can cover in disclosed technology contents
In enclosing.Meanwhile, in this specification it is cited such as " on ", D score, "left", "right", the term of " centre " and " ", be also only
It is easy to understanding for narration, and is not used to limit enforceable scope of the invention, its relativeness is altered or modified, without essence
Under change technology contents, when being also considered as enforceable category of the invention.
In the following explanation to the technical scheme of embodiments of the invention, " first ", that " second " is for only for ease of is right
The title of each parts makes a distinction, and is not to be limited for the structure or function of each parts；" rotating forward ", " reversion " are only
It is two relative direction of rotation, " rotating forward " not necessarily clockwise or counterclockwise, reversion is also not necessarily clockwise
Or rotate counterclockwise.
As depicted in figs. 1 and 2, a kind of vibration-proof structure of sewing machine that the present invention is provided, including upper rotating shaft 1 and suture needle connection
Bar 4, perpendicular to upper rotating shaft 1, the lower end of suture needle connecting rod 4 is used to install suture needle suture needle connecting rod 4, is connected with upper rotating shaft 1 and turned
Arm 20, is hinged with axle connecting rod 18 on connecting lever 20, the lower end of upper axle connecting rod 18 is hinged in the suture needle connecting rod 4, sewing machine
During work, upper rotating shaft 1 drives connecting lever 20 to rotate, so as to drive suture needle connecting rod 4 to pump；Connect in the upper rotating shaft 1
Spindle balance block 6 is connected, when suture needle connecting rod 4 is moved downward to minimum point, the barycenter of the upper spindle balance block 6 is higher than upper rotating shaft
1 axle center；When suture needle connecting rod 4 is moved upward to peak, the axle of the barycenter less than upper rotating shaft 1 of the upper spindle balance block 6
The heart.In a kind of vibration-proof structure of sewing machine of the invention, suture needle connecting rod 4 is perpendicular to upper rotating shaft 1 and by being connected in upper rotating shaft 1
Connecting lever 20 drive and pump, so, suture needle connecting rod 4 and connecting lever 20 can produce inertia force along the vertical direction simultaneously
Act in rotating shaft 1, due to being connected with spindle balance block 6 in upper rotating shaft 1；When suture needle connecting rod 4 be moved downward to it is minimum
During point, the inertia force that suture needle connecting rod 4 and connecting lever 20 are acted in rotating shaft 1 has a larger component vertically downward, and this
When on spindle balance block 6 axle center of the barycenter higher than upper rotating shaft 1, the inertia force that upper spindle balance block 6 is produced act in rotating shaft 1 and
With component vertically upward；When suture needle connecting rod 4 is moved upward to peak, suture needle connecting rod 4 and connecting lever 20 are acted on
Inertia force in upper rotating shaft 1 has larger component vertically upward, and the barycenter for now going up spindle balance block 6 is less than upper rotating shaft 1
Axle center, the inertia force that upper spindle balance block 6 is produced acted in rotating shaft 1 and with component vertically downward；So, upper axle is put down
The inertia force that weighing apparatus block 6 is produced can offset the inertia force that suture needle connecting rod 4 and connecting lever 20 are acted in rotating shaft 1, so as to reduce
The vibration of sewing machine and noise, reduce the abrasion that moving parts move vice division chief, improve the operating environment of operating personnel.
As depicted in figs. 1 and 2, the motion of sewing machine also includes the lower rotary shaft 2 parallel to upper rotating shaft 1, on lower rotary shaft 2
Be connected with looper connecting rod 5, the right-hand member of looper connecting rod 5 is used to install looper, looper connecting rod 5 parallel to lower rotary shaft 2,
It is connected with the power transmission shaft 3 of looper connecting rod 5 perpendicular to lower rotary shaft 2 by one between looper connecting rod 5 and lower rotary shaft 2,
When sewing machine works, the upper rotating shaft 1 rotates and drives suture needle connecting rod 4 to pump；Lower rotary shaft 2 rotates and drives biography
The forward or reverse of moving axis 3, the reciprocally forward or reverse in certain angle of power transmission shaft 3, so as to drive looper connecting rod 5 or so past
Multiple motion；Suture needle connecting rod 4 and looper connecting rod 5 cooperate and move and drive suture needle and looper to complete sewing operation；In order to
Preferably reduce the vibration of sewing machine, lower axle balance weight 7 is connected with lower rotary shaft 2, additional equilibrium is connected with power transmission shaft 3
Block 8, when sewing machine works, the suture needle connecting rod 4 of sewing machine pumps and can produce the inertia force of vertical direction, looper
The bilateral reciprocation of connecting rod 5 can produce the inertia force along the axial direction of looper connecting rod 5；Due to being connected with upper rotating shaft 1
Spindle balance block 6, lower axle balance weight 7 is connected with lower rotary shaft 2, upper spindle balance block 6 is rotated with upper rotating shaft 1 and can produce vertical direction
Inertia force, lower axle balance weight 7 is rotated with lower rotary shaft 2 can produce the inertia force of vertical direction, do not installed according to sewing machine
The actual conditions of inertia force when spindle balance block 6, lower axle balance weight 7 and additional counterweight 8 and spindle balance block 6 is set at upper turn
The phase angle of phase angle and lower axle balance weight 7 on axle 1 on lower rotary shaft 2, makes the inertia produced by suture needle connecting rod 4
Inertia force produced by force direction and upper spindle balance block 6, lower axle balance weight 7 is in opposite direction, upper spindle balance block 6 and lower axle balance weight
Inertia force produced by 7 just can partially or completely offset the inertia force produced by suture needle connecting rod 4；According to sewing machine not
The actual conditions of inertia force when installing spindle balance block 6, lower axle balance weight 7 and additional counterweight 8 and additional counterweight 8 is set
Phase angle on power transmission shaft 3, makes used produced by the inertia force direction and additional counterweight 8 produced by looper connecting rod 5
Property force direction is conversely, the inertia force produced by additional counterweight 8 can just offset produced by looper connecting rod 5 partially or completely
Inertia force.
In a kind of vibration-proof structure of sewing machine of the invention, the motion parts on sewing machine can produce inertia force,
Inertia force produced by suture needle connecting rod 4 and looper connecting rod 5 is larger, wherein, suture needle connecting rod 4 moves up and down, so suture needle
Mainly in the vertical direction, looper connecting rod 5 is mainly moved back and forth inertia force produced by connecting rod 4 in left-right direction, and looper connects
Can also along the vertical direction make reciprocating motion more by a small margin while 5 bilateral reciprocation of extension bar, so, the institute of looper connecting rod 5
The inertia force of generation is main in left-right direction；When suture needle connecting rod 4 is moved downward to minimum point, the original part of sewing machine (ratio
Such as, suture needle connecting rod 4) it is downward to the inertia force of the frame generation of sewing machine, now, the barycenter of the upper spindle balance block 6 is higher than
The axle center of upper rotating shaft 1；Produced by upper spindle balance block 6 inertia force (inertia force size and direction produced by upper spindle balance block 6 with
Centrifugal force produced by upper spindle balance block 6 is identical) there is upward component；When suture needle connecting rod 4 is moved upward to peak,
Upwards, now, the barycenter of the upper spindle balance block 6 is less than upper for the inertia force that the original part of sewing machine is produced to the frame of sewing machine
The axle center of rotating shaft 1, the inertia force produced by upper spindle balance block 6 has downward component；It is used produced by institute above spindle balance block 6
Property power has negative function to the inertia force produced by the original part of sewing machine.
In a kind of vibration-proof structure of sewing machine of the invention, lower rotary shaft 2 is connected with power transmission shaft 3, and lower rotary shaft 2 is rotated
The forward or reverse in the range of certain angle of power transmission shaft 3 can be driven, as one kind preferred embodiment, as shown in figure 4, figure
O is the axis of rotation of lower rotary shaft 2 in 4, and lower rotary shaft 2 is provided with terminal pad 9, and terminal pad 9 is coaxial with lower rotary shaft 2 to be fixedly disposed,
Terminal pad 9 is driven by lower rotary shaft 2 and is rotated；Terminal pad 9 is provided with one section of first jointed shaft 10 parallel to lower rotary shaft 2；First
Lower axle connecting rod 11 is hinged with jointed shaft 10, incorporated by reference to Fig. 4 Fig. 5, the lower end of lower axle connecting rod 11 is provided with a sphere hinge hole 12；Institute
State and driven rocking bar 13 is socketed with power transmission shaft 3, driven rocking bar 13 is provided with perpendicular to the power transmission shaft 3, the end of driven rocking bar 13
With the sphere articulated joint 14 that the sphere hinge hole 12 is hinged cooperation, so, lower rotary shaft 2 is rotated, and can drive lower axle connecting rod 11
Upper end is rotated around the axle center of lower rotary shaft 2, and the lower end of lower axle connecting rod 11 is hinged with driven rocking bar 13, and lower axle connecting rod 11 is driven from shaking
The sphere articulated joint 14 of bar 13 swings up and down, so as to drive the forward or reverse of power transmission shaft 3, (in Fig. 4, power transmission shaft 3 is in certain angle
In the range of clockwise or counterclockwise).As shown in fig. 6, being fixedly connected with drive rocker 15 on the power transmission shaft 3, driving is shaken
Bar 15 is provided with a drive block 16, two is further fixed in looper connecting rod 5 perpendicular to the power transmission shaft 3, the upper end of drive rocker 15
Individual stop block 17, the drive block 16 is located between two stop blocks 17, and driving just can be driven when 3 forward or reverse of power transmission shaft
Rocking bar 15 swings, and drive rocker 15 makes drive block 16 be abutted with the stop block 17 on the left side and connect looper by swinging
Extension bar 5 is stirred to the left, or is abutted with the stop block 17 on the right and stirred looper connecting rod 5 to the right, so, looper connecting rod 5
Just can bilateral reciprocation.
In a kind of vibration-proof structure of sewing machine of the invention, suture needle connecting rod 4 is connected with upper rotating shaft 1, upper rotating shaft 1
Rotate and drive suture needle connecting rod 4 to pump, as shown in figure 3, being connected with connecting lever 20, connecting lever 20 in the upper rotating shaft 1
On be hinged with axle connecting rod 18, the lower end of upper axle connecting rod 18 is hinged in the suture needle connecting rod 4, so, upper rotating shaft 1 rotate and
Connecting lever 20 is driven to rotate, connecting lever 20 is rotated and drives the upper end of axle connecting rod 18 to be rotated around the axle center of upper rotating shaft 1, upper axle connecting rod 18
Lower end be hinged with suture needle connecting rod 4 and drive suture needle connecting rod 4 to move along a straight line upper and lower, back and forth.Upper rotating shaft 1 is at connecting lever 20
The inertia force for being born is maximum, because connecting lever 20 itself is not rotary structure, so, connecting lever 20 can be produced when rotating
Inertia force is simultaneously acted in rotating shaft 1, and when sewing machine works, connecting lever 20, upper axle connecting rod 18 and suture needle connecting rod 4 are vertically square
Velocity component to (i.e. vertical direction) is larger, so, it is perpendicular produced by connecting lever 20, upper axle connecting rod 18 and suture needle connecting rod 4
Nogata to inertia force can be acted in upper rotating shaft 1 by connecting lever 20, in order to avoid in the upper rotating shaft 1 institute it is increased on spindle balance
The inertia force that the inertia force that block 6 is produced is acted in upper rotating shaft 1 with connecting lever 20 is formed causes sewing machine generation to be toppled occasionally with joint efforts
Trend, upper spindle balance block 6 should be positioned as close to connecting lever 20, as shown in figure 3, the upper spindle balance block 6 is located at connecting lever
On 20, connecting lever 20 is provided with the second jointed shaft 21, and the upper end of the upper axle connecting rod 18 is hinged on second jointed shaft 21, on
Respectively positioned at the axle center both sides of upper rotating shaft 1, the connecting lever 20 is provided with a secter pat 19 to the jointed shaft 21 of spindle balance block 6 and second,
The upper spindle balance block 6 is removably wrapped on the secter pat 19.Secter pat 19 itself on connecting lever 20 can be to connecting lever
20th, the inertia force produced by the part such as suture needle connecting rod 4, upper axle connecting rod 18 plays certain balanced action.
In a kind of vibration-proof structure of sewing machine of the invention, the upper spindle balance block 6 can be with upper rotating shaft 1 using removable
Unload connected mode connection；It is of course also possible to the balance of the inertia force of rotating shaft 1 is asked on just considering in sewing machine design and installation
Topic, sets into a single integrated structure when the first connecting lever 20 is manufactured by upper spindle balance block 6 and connecting lever 20.Certainly, lower axle balance weight 7 is with
Can be connected using mode is detachably connected between rotating shaft 2, it is also possible to which lower axle balance weight 7 and lower rotary shaft 2 are set into integral knot
Configuration formula；Can be connected using mode is detachably connected between additional counterweight 8 and power transmission shaft 3, it is also possible to by additional counterweight 8
Into a single integrated structure form is set with power transmission shaft 3.
In a kind of vibration-proof structure of sewing machine of the invention, as shown in fig. 7, when suture needle connecting rod 4 is moved downward, under
Axle connecting rod 11 is moved downward, and the inertia force component of the vertical direction that looper connecting rod 5 is produced to left movement, suture needle connecting rod 4 is
Fz ', direction is downward；The inertia force component of the vertical direction that lower axle connecting rod 11 is produced is Fz ", direction is downward；It is connected to rotating shaft 1
On the inertia force component of vertical direction that produces of upper spindle balance block 6 be F1z, direction is upward；It is connected to the lower axle on lower rotary shaft 2
The inertia force component of the vertical direction that balance weight 7 is produced is F2z, and direction is upward；It is connected to the additional counterweight 8 on power transmission shaft 3
The inertia force component of the vertical direction of generation is F3z, and direction is upward；Due to upper spindle balance block 6, lower axle balance weight 7, additional equilibrium
The inertia force component direction of the vertical direction produced by block 8 and the vertical direction produced by suture needle connecting rod 4, lower axle connecting rod 11
Inertia force component direction conversely, so, the vertical direction that upper spindle balance block 6, lower axle balance weight 7, additional counterweight 8 are produced it is used
Property force component can offset the inertia force component of the vertical direction produced by suture needle connecting rod 4 and lower axle connecting rod 11.Looper is connected
The inertia force component in left-right direction that bar 5 is produced is Fx, and direction is to the left；And produced by additional counterweight 8 in left-right direction
Inertia force component be F3x, direction is to the right；So, the inertia force component in left-right direction produced by additional counterweight 8 can
Offset the inertia force component in left-right direction produced by looper connecting rod 5.In order to avoid or reducing the increased balance of institute as far as possible
Couple is formed between the inertia force produced by the original part of inertia force and sewing machine produced by block and produce sewing machine and topple
Trend, increased each balance weight should be positioned as close to the original part for producing larger inertia force of sewing machine, in this hair
In a kind of vibration-proof structure of bright sewing machine, the inertia force of the junction of connecting lever 20 in upper rotating shaft 1 is larger, so, upper spindle balance
Block 6 is positioned as close to connecting lever 20, and upper spindle balance block 6 can be arranged on connecting lever 20；At lower axle connecting rod 11 on lower rotary shaft 2
Produced inertia force is larger, so lower axle balance weight 7 should be positioned as close to lower axle connecting rod 11, it is former in order to take into account sewing machine
The need for having structure and installing lower axle balance weight 7, the distance between the barycenter of lower axle balance weight 7 and suture needle are lower along lower rotary shaft 2
Axis direction component be 80 to 100 millimeters, preferably 90 millimeters；Drive rocker 15 on power transmission shaft 3 stirs looper connection
The bilateral reciprocation of bar 5, drive rocker 15 is larger with inertia force produced by the junction of power transmission shaft 3, so should be by additional equilibrium
Block 8 is positioned as close to drive rocker 15, in order to the need for taking into account sewing machine original structure and installing additional counterweight 8, add
The distance between the barycenter of balance weight 8 and suture needle are 5 to 20 millimeters, preferably 10 in the component of the axis direction along power transmission shaft 3
Millimeter.
In a kind of vibration-proof structure of sewing machine of the invention, as shown in figure 8, the main parameter of balance weight has balance weight
The distance between quality m (quality of balance weight can be equivalent to the particle at barycenter), barycenter and axis of rotation r, barycenter and rotation
The angle theta of line and vertical direction between the rotating shaft heart；In order that the whole machine of sewing machine reaches preferable counterbalance effect, it is necessary to right
Upper spindle balance block 6, lower axle balance weight 7, the parameter of additional counterweight 8 make certain setting and restriction.Because sewing machine is tied in itself
The limitation of structure, the quality and volume of balance weight should not be too big, and upper spindle balance block 6 is arranged on connecting lever 20, and its installing space is larger,
The relevant parameter of spindle balance block 6 can be set according to actual needs；The installing space of lower axle balance weight 7 and additional counterweight 8
Compare limitation, it is preferable that the quality of the lower axle balance weight 7 is 70 to 75 grams, barycenter and the lower rotary shaft 2 of lower axle balance weight 7
The distance between axle center is 6 to 10 millimeters；The quality of the additional counterweight 8 is 160 to 200 grams, the barycenter of additional counterweight 8
It it is 15 to 20 millimeters with the distance between the axle center of lower rotary shaft 2；In a kind of specifically should for vibration-proof structure of sewing machine of the invention
In, the quality of the lower axle balance weight 7 is 72.6 grams, the distance between the barycenter of lower axle balance weight 7 and the axle center of lower rotary shaft 2
Be 8.62 millimeters, the quality of the additional counterweight 8 is 185.5 grams, the barycenter of lower axle balance weight 7 and the axle center of lower rotary shaft 2 it
Between distance be 17.42 millimeters.In actual applications, the inertia force that is produced during original part real work according to sewing machine and
Moment of inertia, calculates by Optimum Synthesis, and considers actual installation space, calculate spindle balance block 6, lower axle balance weight 7,
The line and vertical side of the distance between the quality m of additional counterweight 8, barycenter and axis of rotation between r, barycenter and axis of rotation
To angle theta, and installation position of installation site, lower axle balance weight 7 of the upper spindle balance block 6 in upper rotating shaft 1 on lower rotary shaft 2
Put, the parameter such as installation site of the additional counterweight 8 on power transmission shaft 3, the final profile of mass body will combine the actual peace of machine
Dress space and assembly technology determine.
In a kind of vibration-proof structure of sewing machine of the invention, it is preferable that when suture needle connecting rod 4 moves downwardly to minimum point
When, the barycenter of the upper spindle balance block 6 higher than upper rotating shaft axle center, and barycenter and the upper rotating shaft 1 of upper spindle balance block 6 axle center it
Between line and vertical direction between angle be 0-30 degree；The barycenter of the lower axle balance weight 7 is higher than the axle center of lower rotary shaft,
And the angle between the line and vertical direction between the barycenter of lower axle balance weight 7 and the axle center of lower rotary shaft 2 is 0-30 degree；Institute
The axle center of the barycenter less than power transmission shaft of additional counterweight 8 is stated, the barycenter of additional counterweight 8 is located at the axle center right side of power transmission shaft, and
The angle between line and vertical direction between the barycenter of additional counterweight 8 and the axle center of power transmission shaft 3 is 35-75 degree, preferably
It it is 55.8 degree, now, looper connecting rod moves to high order end.When suture needle connecting rod 4 moves up to peak, the upper axle
The barycenter of balance weight 6 less than upper rotating shaft axle center, and line between the barycenter of upper spindle balance block 6 and the axle center of upper rotating shaft 1 with
Angle between vertical direction is 0-30 degree；The barycenter of the lower axle balance weight 7 is less than the axle center of lower rotary shaft, and lower spindle balance
The angle between line and vertical direction between the barycenter of block 7 and the axle center of lower rotary shaft 2 is 0-30 degree；The additional equilibrium
Less than the axle center of power transmission shaft, the barycenter of additional counterweight 8 is located on the right side of the axle center of power transmission shaft the barycenter of block 8, and additional counterweight 8
Barycenter and the axle center of power transmission shaft 3 between line and vertical direction between angle be 0-40 degree, preferably 20 degree；Now,
Looper connecting rod moves to low order end.In above-mentioned angular range, upper spindle balance block 6, lower axle balance weight 7 and additional counterweight 8
Produced inertia force can keep substantially opposite state with the direction of the inertia force produced by the original part of sewing machine, can
Inertia force preferably produced by the balance original part of sewing machine.When suture needle connecting rod 4 moves downwardly to minimum point or suture needle company
When extension bar 4 moves up to peak, the drive line angle between upper axle connecting rod 18 and suture needle connecting rod 4 is minimum, is unfavorable for connecting lever 20
Rotate, now, if the barycenter opposed vertical direction of upper spindle balance block 6 has an angle, being used to produced by upper spindle balance block 6
Property power just there is certain horizontal component, the horizontal component of the inertia force produced by upper spindle balance block 6 is conducive to connecting lever 20 to keep
Rotate, it is preferable that when suture needle connecting rod 4 moves downwardly to minimum point or suture needle connecting rod 4 moves up to peak, upper axle
The angle between line and vertical direction between the axle center of the barycenter of balance weight 6 and upper rotating shaft 1 is 30 degree, can either so be protected
The component of the vertical direction of the inertia force that spindle balance block 6 is produced can preferably offset the perpendicular of the original part generation of sewing machine on card
Nogata to inertia force, additionally it is possible to be conducive to connecting lever 20 keep rotate.When suture needle connecting rod 4 moves downwardly to minimum point or suture needle
When connecting rod 4 moves up to peak, drive line angle, drive rocker 15 and looper between lower axle connecting rod 11 and driven rocking bar 13
Drive line angle between connecting rod 5 reaches minimum state, is unfavorable for the rotation of lower rotary shaft 2 and power transmission shaft 3, it is preferable that work as suture needle
Connecting rod 4 moves downwardly to minimum point or when suture needle connecting rod 4 moves up to peak, and the barycenter of lower axle balance weight 7 is with
The angle between line and vertical direction between the axle center of rotating shaft 2 is 20 degree, and experiment is proved, can either so ensure that lower axle is put down
The component in left-right direction of the inertia force that weighing apparatus block 7 is produced can preferably offset that the original part of sewing machine produces along right and left
To inertia force, additionally it is possible to be conducive to lower rotary shaft 2 keep rotate.
In a kind of vibration-proof structure of sewing machine of the invention, Fig. 8 is refer to, it is preferable that when suture needle connecting rod 4 is to moving down
Move during to minimum point, the barycenter of the upper spindle balance block 6 is in the state for upward deflecting, and then, suture needle connecting rod 4 starts upwards
Motion, and the angle between line and vertical direction between the barycenter of upper spindle balance block 6 and the axle center of upper rotating shaft 1 gradually subtracts
It is small；When suture needle connecting rod 4 is moved upward to peak, the barycenter of the upper spindle balance block 6 is in the state for deflecting down, with
Afterwards, suture needle connecting rod 4 starts to move downward, and line between the barycenter of upper spindle balance block 6 and the axle center of upper rotating shaft 1 with it is vertical
Angle between direction is gradually reduced.When lower axle connecting rod 11 moves downwardly to minimum point, suture needle connecting rod 4 is moved downwardly to most
Low spot, now, the barycenter of the lower axle balance weight 7 is in the state for upward deflecting, and then, lower axle connecting rod 11 starts fortune upwards
Dynamic, the angle between line and vertical direction between the barycenter of lower axle balance weight 7 and the axle center of lower rotary shaft 2 is gradually reduced；When
When lower axle connecting rod 11 moves up to peak, suture needle connecting rod 4 moves up to peak, now, the lower axle balance weight 7
Barycenter be in the state that deflects down, then, lower axle connecting rod 11 starts to move downward, the barycenter of lower axle balance weight 7 with lower turn
The angle between line and vertical direction between the axle center of axle 2 is gradually reduced.When suture needle connecting rod 4 is moved downward to lowest order
When putting, the barycenter of additional counterweight 8 is in the state for upward deflecting；Then, suture needle connecting rod 4 starts motion upwards, adds flat
The angle between line and vertical direction between the barycenter of weighing apparatus block 8 and the axle center of lower rotary shaft 2 is gradually reduced；When suture needle connecting rod
4 when being moved upward to extreme higher position, and the barycenter of additional counterweight 8 is in the state for deflecting down, then, suture needle connecting rod 4
Start to move downward, the angle between line and vertical direction between the barycenter of additional counterweight 8 and the axle center of lower rotary shaft 2 by
It is decrescence small.When looper connecting rod 5 moves to high order end position to the left, the barycenter of additional counterweight 8 is in the shape for deflecting to the right
State；Then, looper connecting rod 5 starts to move right, the line between the barycenter of additional counterweight 8 and the axle center of lower rotary shaft 2 with
Angle between vertical direction gradually increases；When looper connecting rod 5 is moved right to low order end position, additional counterweight 8
Barycenter is in the state for deflecting to the left；Then, looper connecting rod 5 starts to left movement, the barycenter and lower rotary shaft of additional counterweight 8
The angle between line and vertical direction between 2 axle center gradually increases.
Calculated by the inertia force produced by the correlated parts in a kind of vibration-proof structure of sewing machine of the invention
Analysis, as shown in figure 9, whole machine (not installing spindle balance block 6, lower axle balance weight 7, the sewing machine of additional counterweight 8) is produced
Raw inertia force is in mechanical periodicity with the main axis of sewing machine, and its crest value and valley value are respectively 1000N and -600N, whole
Bulk wave moves larger.As shown in Figure 10 to Figure 12, the vertical direction that upper spindle balance block 6, lower axle balance weight 7, additional counterweight 8 are produced
Inertia force phase it is essentially identical and in opposite direction, as shown in figure 13, additional counterweight 8 produce inertia in left-right direction
The phase of force component is essentially identical and in opposite direction with the phase of the inertia force component in left-right direction of whole machine；Thus offset
The inertia force of the vertical direction of the part of whole machine, plays a part of to reduce complete machine oscillation.Because in sewing machine, suture needle is connected
Inertia force produced by bar 4, looper connecting rod 5 is larger, so the neighbouring setting in suture needle connecting rod 4, looper connecting rod 5 is balanced
Block, upper spindle balance block 6, lower axle balance weight 7, the design parameter of additional counterweight 8 are according to the size of the overall inertia force of sewing machine
Determine with direction, when vibration damping is carried out to sewing machine using a kind of mechanism for reduction sewing machine vibration of the invention, can
To test the size and Orientation of the overall inertia force of sewing machine, and come true according to the size and Orientation of the overall inertia force of sewing machine
Surely spindle balance block 6, lower axle balance weight 7, the relevant parameter of additional counterweight 8 are gone up.
In upper spindle balance block 6, lower axle balance weight 7, additional counterweight 8 in a kind of vibration-proof structure of sewing machine of the invention
Any one can play a part of to reduce the vibration of whole machine, and do not conflict mutually, can select according to actual needs single or many
Individual being combined uses, and upper spindle balance block 6, lower axle balance weight 7, additional counterweight 8 are applied in combination simultaneously can reach optimal shape
State.
With a kind of vibration-proof structure of sewing machine of the invention described above correspondingly, the present invention also provides a kind of sewing machine, uses
A kind of vibration-proof structure of the sewing machine of above-mentioned technical proposal or its any preferred technical scheme.
Technical scheme based on above-described embodiment, a kind of sewing machine of the invention and its vibration-proof structure, with following beneficial
Effect：
1st, in specific rotating shaft add balance weight by way of offset or the existing sewing machine of partial offset in moving component
Produced inertia force and moment of inertia, so as to reduce vibration and the noise of sewing machine, reduce the machine of the motion vice division chief of sewing machine
Tool weares and teares, and improves the operating environment of operating personnel；
2nd, three balance weights are used singly or in combination and can reduce the vibration of whole machine, and do not conflict mutually, can be according to reality
Border needs selection to be used singly or in combination；
3rd, it is workable, it is not required to change existing motion, balance block structure is simple, low cost.
In sum, the present invention effectively overcomes various shortcoming of the prior art and has high industrial utilization.
The above-described embodiments merely illustrate the principles and effects of the present invention, not for the limitation present invention.It is any ripe
The personage for knowing this technology all can carry out modifications and changes under without prejudice to spirit and scope of the invention to above-described embodiment.Cause
This, those of ordinary skill in the art is complete with institute under technological thought without departing from disclosed spirit such as
Into all equivalent modifications or change, should be covered by claim of the invention.
Claims (8)
1. a kind of vibration-proof structure of sewing machine, including upper rotating shaft (1) and suture needle connecting rod (4), suture needle connecting rod (4) is perpendicular to upper
Rotating shaft (1), is connected with connecting lever (20) on upper rotating shaft (1), axle connecting rod (18) is hinged with connecting lever (20), upper axle connecting rod (18)
Lower end is hinged on the suture needle connecting rod (4), and when sewing machine works, upper rotating shaft (1) drives connecting lever (20) to rotate, so as to drive
Suture needle connecting rod (4) pumps；It is characterized in that：
Upper spindle balance block (6) is connected on the upper rotating shaft (1), when suture needle connecting rod (4) is moved downward to minimum point, it is described on
Axle center of the barycenter of spindle balance block (6) higher than upper rotating shaft (1)；
When suture needle connecting rod (4) is moved upward to peak, the barycenter of the upper spindle balance block (6) is less than upper rotating shaft (1)
Axle center.
2. the vibration-proof structure of sewing machine as claimed in claim 1, it is characterized in that：When suture needle connecting rod (4) is moved downward to most
During low spot, the barycenter of the upper spindle balance block (6) is in the state for upward deflecting；When suture needle connecting rod (4) is moved upward to most
During high point, the barycenter of the upper spindle balance block (6) is in the state for deflecting down.
3. the vibration-proof structure of sewing machine as claimed in claim 1, it is characterized in that：When suture needle connecting rod (4) is moved downward to most
During low spot, the barycenter of the upper spindle balance block (6) higher than upper rotating shaft axle center, and upper spindle balance block and upper rotating shaft (1) axle center
Between line and vertical direction between angle be 0-30 degree.
4. the vibration-proof structure of sewing machine as claimed in claim 1, it is characterized in that：When suture needle connecting rod (4) is moved upward to most
During high point, the barycenter of the upper spindle balance block (6) less than upper rotating shaft axle center, and upper spindle balance block and upper rotating shaft (1) axle center
Between line and vertical direction between angle be 0-30 degree.
5. the vibration-proof structure of sewing machine as claimed in claim 1, it is characterized in that：The upper spindle balance block (6) is located at connecting lever
(20) on, connecting lever (20) is provided with the second jointed shaft (21), and the upper end of the upper axle connecting rod (18) is hinged on described second and is hinged
On axle (21), upper spindle balance block (6) and the second jointed shaft (21) are respectively positioned at the axle center both sides of upper rotating shaft (1).
6. the vibration-proof structure of sewing machine as claimed in claim 5, it is characterized in that：The connecting lever (20) is provided with a secter pat
(19), upper spindle balance block (6) is removably wrapped on the secter pat (19).
7. the vibration-proof structure of sewing machine as claimed in claim 5, it is characterized in that：The upper spindle balance block (6) and connecting lever (20)
It is structure as a whole.
8. a kind of sewing machine, it is characterized in that, including the sewing machine described in any one of the claims 1 to 7 vibration-proof structure.
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| CN201611236771.6A CN106757844B (en) | 2016-12-28 | 2016-12-28 | sewing machine and damping structure thereof |
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| CN201611236771.6A CN106757844B (en) | 2016-12-28 | 2016-12-28 | sewing machine and damping structure thereof |
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| CN108978058A (en) * | 2018-09-06 | 2018-12-11 | 杰克缝纫机股份有限公司 | A kind of seaming and cutting machine |
| CN109537202A (en) * | 2018-10-11 | 2019-03-29 | 浙江信胜缝制设备有限公司 | Balance drive machine head of embroidery machine and embroidery machine |
| CN110565283A (en) * | 2019-09-16 | 2019-12-13 | 杰克缝纫机股份有限公司 | Sewing machine |
| CN110804809A (en) * | 2019-11-11 | 2020-02-18 | 杰克缝纫机股份有限公司 | Sewing machine and needle bar mechanism |
| CN111286878A (en) * | 2020-04-17 | 2020-06-16 | 杰克缝纫机股份有限公司 | Sewing machine needling mechanism and method for reducing sewing machine vibration |
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| CN111286878A (en) * | 2020-04-17 | 2020-06-16 | 杰克缝纫机股份有限公司 | Sewing machine needling mechanism and method for reducing sewing machine vibration |
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|---|---|
| CN106757844B (en) | 2020-01-31 |
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