A kind of interior lubricating structure of Sewing machines
Technical field
The utility model belongs to sewing machine technique field, relates to the interior lubricating structure of a kind of lubricating structure, particularly a kind of Sewing machines.
Background technology
In the body of Sewing machines, be provided with axle and lower shaft, upper axle is by driven by motor, for driving shank action; Lower shaft is for driving the transmission of cloth.For fear of power source is set in addition, drive lower shaft action, often between upper axle and lower shaft, transmission mechanism is set.Like this, when upper axle rotates, upper axle just can be passed to lower shaft by kinetic energy, such design simplification the structure of Sewing machines, take full advantage of the kinetic energy of going up axle in Sewing machines.
For example, Chinese utility model patent (application number: 201220297983.6; Granted publication number: the transmission mechanism that CN202688661) discloses a kind of Sewing machines.It comprises, comprise Sewing machines body, support and be positioned at the lower shaft of sewing machine of axle, support on the Sewing machines of body, on described Sewing machines, axle is to drive by drive motors, is equipped with accordingly synchronous pulley on upper axle, lower shaft, and upper axle drives lower shaft by Timing Belt.
Except this transmission mechanism, in existing Sewing machines, transmission mechanism also has other various ways.But in these designs, due to transmission mechanism one direct acting, in order to make transmission mechanism action more smooth and easy, need to be lubricated transmission mechanism, and certain interval of time, just need to be lubricated transmission mechanism.In the transmission mechanism of this Sewing machines, the lubricated comparatively trouble to transmission mechanism.Also there is Similar Problems in existing other Sewing machines.
Summary of the invention
The purpose of this utility model is to have the problems referred to above for existing technology, has proposed a kind of interior lubricating structure of the Sewing machines that can automatically be lubricated transmission mechanism in Sewing machines.
The purpose of this utility model can realize by following technical proposal: a kind of interior lubricating structure of Sewing machines, in the body of Sewing machines, there is upper axle and the lower shaft that is positioned at axle below, between above-mentioned upper axle and lower shaft, there is the transmission mechanism that drives lower shaft to swing when upper axle rotational, it is characterized in that, the Packed lubricating cavity of tool in described body, above-mentioned transmission mechanism is positioned at lubricating cavity and has oil pump on the top of lubricating cavity, on oil pump, there is oil-in and oil-out, the other end that the oil-in place of oil pump is connected with oil inlet pipe and oil inlet pipe is positioned at place, lubricating cavity bottom, the other end that the oil-out place of above-mentioned oil pump is connected with flowline and flowline is positioned at above-mentioned transmission mechanism top.
Upper axle action can drive needle bar of sewing machine action, and lower shaft action can drive Sewing machines feeding.Upper axle action is by driven by motor, and motor can be connected with upper axle one end by Timing Belt.In shank action, Sewing machines needs continuous feeding to complete sewing process.Between upper axle and lower shaft, transmission mechanism is set, when in driven by motor, axle rotates, under the effect of transmission mechanism, lower shaft is action simultaneously also, realizes feeding action.
During use, moderate lubrication oil is equipped with in lubricating cavity bottom.Lubricating cavity is set to hermetically-sealed construction, in order to avoid the lubricating oil in lubricating cavity to outward leakage, makes the lubricating oil in lubricating cavity recycle for a long time.On lubricating cavity top, oil pump is set, be convenient to the connecting portion between whole transmission mechanism, transmission mechanism and upper axle and lower shaft to carry out sufficient lubrication, greatly promote the anti-wear performance of transmission mechanism, thereby extended greatly the service life of machine, effectively reduced the noise of machine.The other end of the oil inlet pipe of oil pump is positioned at the bottom of lubricating cavity, so oil pump can be evacuated to the lubricating oil that is positioned at lubricating cavity bottom at the oil-out place of oil pump, and flowline sprays away lubricating oil, thereby transmission mechanism is lubricated.
In the interior lubricating structure of above-mentioned Sewing machines, described body upper is fixed with upper cover plate, and described underpart is fixed with lower cover, forms above-mentioned lubricating cavity between above-mentioned upper cover plate, lower cover and body.On body, be connected upper cover plate and lower cover, thus the lubricating cavity of sealing formed, except can seal lubrication chamber, also can play certain deadening to Sewing machines, in order to avoid the noise in lubricating cavity passes to Sewing machines outside.
In the interior lubricating structure of above-mentioned Sewing machines, between described upper cover plate and body, there is sealing ring.Sealing ring one is set between upper cover plate and body, makes the sealing effectiveness that is connected between upper cover plate and body better.
In the interior lubricating structure of above-mentioned Sewing machines, between described lower cover and body, there is sealing ring.Sealing ring two is set between lower cover and body, makes the sealing effectiveness that is connected between lower cover and body better.
In the interior lubricating structure of above-mentioned Sewing machines, described oil pump is plunger displacement pump, and the pump housing of plunger displacement pump is connected in body, and above-mentioned upper axle middle part has the cam contacting with the plunger of plunger displacement pump.
Plunger displacement pump relies on the reciprocating motion of plunger, makes the volume of seal operation cavity volume change to realize oil-feed, fuel-displaced.When upper axle rotates, the plunger of the cam energy reciprocating plunger displacement pump at upper axle middle part, thus realize plunger displacement pump oil-feed and fuel-displaced.In utilization, the action of the cam driven plunger displacement pump of axle, takes full advantage of the kinetic energy that axle rotates.As another kind of scheme, oil pump adopts common oil pump, and to oil pump energising, the driven by motor in oil pump realizes oil-feed, fuel-displaced process.
In the interior lubricating structure of above-mentioned Sewing machines, described transmission mechanism comprises transmission eccentric wheel, connecting rod, sector gear and travelling gear, above-mentioned transmission eccentric wheel is connected on axle, above-mentioned connecting rod one end is enclosed within on transmission eccentric wheel, the middle part of above-mentioned sector gear is hinged in body, the connecting rod other end and sector gear one end are hinged, and above-mentioned travelling gear is connected on lower shaft and travelling gear is meshed with sector gear.When upper axle rotates, because transmission eccentric wheel is connected on upper axle, transmission eccentric wheel energy drivening rod knee-action, thereby connecting rod drives sector gear around the pin joint reciprocally swinging between itself and body, drive again the travelling gear being connected on lower shaft to swing, lower shaft swings simultaneously, realizes Sewing machines feeding.
In the interior lubricating structure of above-mentioned Sewing machines, described transmission mechanism comprises transmission eccentric wheel, connecting rod and travelling gear, above-mentioned transmission eccentric wheel is connected on axle, above-mentioned connecting rod middle part is hinged in body, between described connecting rod and body, there is spring and under the elastic force effect of spring above-mentioned connecting rod one end be resisted against on transmission eccentric wheel, the lower end of described connecting rod is fan-shaped, which is provided with teeth, and above-mentioned travelling gear is connected on lower shaft and travelling gear is meshed with connecting rod lower end.This is the another kind of design of transmission mechanism.When upper axle rotates, due to the setting of transmission eccentric wheel and spring, transmission eccentric wheel energy drivening rod swings, thereby connecting rod is around the pin joint reciprocally swinging between itself and body, drive the travelling gear being connected on lower shaft to swing, lower shaft swings simultaneously, realizes Sewing machines feeding again.
In the interior lubricating structure of above-mentioned Sewing machines, described upper shaft portion is provided with oil sealing one and oil sealing two in lubricating cavity and between upper axle and body.Oil sealing one and oil sealing two are set, axle are rotated more stable, also can between upper axle and body, play sealing function, in order to avoid the lubricating oil in lubricating cavity is to outward leakage simultaneously.
In the interior lubricating structure of above-mentioned Sewing machines, described lower shaft part is provided with oil sealing three and oil sealing four in lubricating cavity and between lower shaft and body.Oil sealing three and oil sealing four are set, lower shaft are rotated more stable, also can between lower shaft and body, play sealing function, in order to avoid the lubricating oil in lubricating cavity is to outward leakage simultaneously.
In the interior lubricating structure of above-mentioned Sewing machines, on described oil pump, be also fixed with bracket, above-mentioned flowline is overlapped on bracket.When flowline is flexible pipe, bracket is set on oil pump, can play positioning action to flowline.
Compared with prior art, the interior lubricating structure of this Sewing machines, due to lubricating cavity and the oil pump of sealing being set in body, can constantly be lubricated the parts in lubricating cavity, makes Sewing machines operation more stable, the noise sending while reducing Sewing machines work.
Accompanying drawing explanation
Fig. 1 is the sectional structure schematic diagram of the interior lubricating structure of this Sewing machines;
Fig. 2 is the interior lubricating structure part perspective view of this Sewing machines;
Fig. 3 is the part-structure schematic diagram of upper axle in the interior lubricating structure of this Sewing machines;
Fig. 4 is the perspective view of interior lubricating structure another part of this Sewing machines;
Fig. 5 is plunger displacement pump cross-sectional view in the interior lubricating structure of this Sewing machines;
Fig. 6 is the perspective view of connecting rod in the interior lubricating structure of this Sewing machines.
In figure, 1, upper axle; 1a, cam; 2, lower shaft; 3, transmission mechanism; 4, lubricating cavity; 5, oil pump; 5a, oil-in; 5b, oil-out; 6, upper cover plate; 7, lower cover; 8, body; 9a, sealing ring one; 9b, sealing ring two; 10, transmission eccentric wheel; 11, connecting rod; 12, sector gear; 13, travelling gear; 14a, oil sealing one; 14b, oil sealing two; 14c, oil sealing three; 14d, oil sealing four; 15, bracket; 16, plunger; 17, spring base; 18, plunger spring; 19, shoe cream room.
The specific embodiment
As shown in Figure 1, the interior lubricating structure of this Sewing machines comprises the lubricating cavity 4 of sealing.Body 8 tops of Sewing machines are fixed with upper cover plate 6, body 8 bottoms are fixed with lower cover 7, between upper cover plate 6 and body 8, be provided with and between sealing ring one 9a, lower cover 7 and body 8, be equipped with sealing ring two 9b, the lubricating cavity 4 of the sealing forming between upper cover plate 6, lower cover 7 and body 8.Between upper cover plate 6 and body 8, sealing ring one 9a and sealing ring two 9b are set between lower cover 7 and body 8, make the sealing effectiveness that is connected between upper cover plate 6 and body 8 better.On body 8, be connected upper cover plate 6 and lower cover 7, thus the lubricating cavity 4 of sealing formed, also can play certain deadening to Sewing machines, in order to avoid the noise in lubricating cavity 4 passes to Sewing machines outside.
During use, moderate lubrication oil is equipped with in lubricating cavity 4 bottoms, and lubricating cavity 4 is set to hermetically-sealed construction, in order to avoid the lubricating oil in lubricating cavity 4 to outward leakage, makes the lubricating oil in lubricating cavity 4 recycle for a long time.
Top in lubricating cavity 4 is provided with axle 1, and a part for upper axle 1 is positioned at lubricating cavity 4, and lubricating cavity 4 is stretched out at its two ends, as shown in Figure 2, and between upper axle 1 and body 8, is provided with oil sealing one 14a and oil sealing two 14b, thereby guarantees the sealing of lubricating cavity 4.Lubricating cavity 4 is stretched out in one end of upper axle 1, and for being connected by Timing Belt with motor, in driven by motor, axle 1 rotates.The other end of upper axle 1 stretches out lubricating cavity 4, for driving shank action.
Bottom in lubricating cavity 4 is provided with lower shaft 2, and a part for lower shaft 2 is positioned at lubricating cavity 4, as shown in Figure 4, is provided with oil sealing three 14c and oil sealing four 14d between lower shaft 2 and body 8, thereby assurance lubricating cavity 4 is worked as sealing.In Fig. 4, due to view direction restriction, oil sealing four 14d are shifted out to one end distance to the right from original position.Lubricating cavity 4 is stretched out in one end of lower shaft 2, for realizing the feeding action of sewing machine cloth.
In lubricating cavity 4, between upper axle 1 and lower shaft 2, be provided with transmission mechanism 3, its concrete set-up mode is:
As shown in Figure 2 and Figure 6, on upper axle 1, be fixed with transmission eccentric wheel 10, the upper end of connecting rod 11, is namely cylindric for the one end being connected with upper axle 1, is set on transmission eccentric wheel 10.Like this, while rotating under the drive of upper axle 1 at motor, connecting rod 11 can knee-action.
As shown in Figure 4, be fixed with travelling gear 13 on lower shaft 2, travelling gear 13 is cylindric and coaxially arranges with lower shaft 2.Outer circumference at travelling gear 13 is evenly provided with teeth.Sector gear 12 is located at the sidepiece of travelling gear 13.The middle part of sector gear 12 is hinged on body 8, and the side surface near travelling gear 13 on sector gear 12 is provided with the teeth that match with travelling gear 13.Sector gear 12 is meshed with travelling gear 13.The lower end of connecting rod 11 is hinged on the other end of sector gear 12.When connecting rod 11 knee-action, just can drive sector gear 12 around the pin joint reciprocating rotation between itself and body 8, sector gear 12 band nutating gears 13 rotate, and lower shaft 2 actions, realize Sewing machines feeding.
As another kind of scheme, on upper axle, be fixed with transmission eccentric wheel, the middle part of connecting rod is hinged in body, the lower end of connecting rod is fan-shaped, fan-shaped position is provided with the teeth that match with travelling gear, the lower end of connecting rod is positioned at the top of travelling gear, has spring and be resisted against on transmission eccentric wheel in the upper end of the elastic force effect lower link of spring between connecting rod and body.When upper axle rotates, due to the setting of transmission eccentric wheel and spring, transmission eccentric wheel energy drivening rod swings, thereby connecting rod is around the pin joint reciprocally swinging between itself and body, drive the travelling gear being connected on lower shaft to swing, lower shaft swings simultaneously, realizes Sewing machines feeding again.
Top in lubricating cavity 4 has plunger displacement pump, and plunger displacement pump is connected on body 8.Plunger displacement pump is set on axle 1.As shown in Figure 3, on upper axle 1, there is cam 1a, its concrete set-up mode is, on upper axle 1 with on the corresponding position of plunger displacement pump, be provided with the circular arc recess that is strip, between the two ends of recess and upper axle 1 outer surface, seamlessly transit, therefore when upper axle 1 rotates, can drive comparatively smoothly the plunger knee-action of plunger displacement pump.
On plunger displacement pump, have oil-in 5a and oil-out 5b, on oil-in 5a and oil-out 5b, be equipped with check valve, that is to say, oil-in 5a can only oil-feed, and oil-out 5b can only be fuel-displaced.The other end that the oil-in 5a place of plunger displacement pump is connected with oil inlet pipe and oil inlet pipe is positioned at lubricating cavity 4 places, bottom, and the other end that the oil-out 5b place of plunger displacement pump is connected with flowline and flowline is positioned at transmission mechanism 3 tops.As shown in Figure 5, the upper end of plunger displacement pump is provided with the plunger 16 of vertical setting, and the upper end of plunger displacement pump is also fixed with spring base 17, and spring base 17 is positioned at plunger 16 tops, between spring base 17 and plunger 16, is provided with plunger spring 18.The cam 1a of upper axle 1 is positioned at plunger 16 places.In plunger 16, be provided with spring eye, the two ends of plunger spring 18 are resisted against respectively in the spring eye of spring base 17 lower ends and plunger 16, and under the effect of plunger spring 18, plunger 16 is resisted against the cam 1a place of axle 1 always.
The shoe cream room 19 in plunger displacement pump with the sealing that is communicated with oil-in 5a and oil-out 5b.Between plunger 16 and plunger displacement pump body, sealing arranges, and that is to say, the gas in shoe cream room 19 or lubricating oil can be from the junctions between plunger 16 and the pump housing of plunger displacement pump to outward leakage.When upper axle 1 rotates, the cam 1a on upper axle 1 rotates, and the rotation of cam 1a drives plunger 16 to move back and forth up and down, thereby constantly changes the volume size of shoe cream room 19.Setting due to oil-in 5a and the upper check valve of oil-out 5b, when plunger 16 moves up, it is large that the volume of shoe cream room 19 becomes, the closed check valve at oil-out 5b place, the check valve at oil-in 5a place is opened, shoe cream room 19 internal pressures diminish, thereby the lubricating oil in oil inlet pipe is adsorbed in shoe cream room 19.When plunger 16 moves down, the smaller volume of shoe cream room 19, the closed check valve that oil-in 5a goes out, the check valve at oil-out 5b place is opened, it is large that the pressure of shoe cream room 19 inside becomes, lubricating oil in shoe cream room 19 is squeezed to flowline from shoe cream room 19, thereby transmission mechanism 3 is carried out to oil jet lubrication.
Top in lubricating cavity 4 arranges plunger displacement pump, be convenient to the connecting portion between whole transmission mechanism 3, transmission mechanism 3 and upper axle 1 and lower shaft 2 to carry out sufficient lubrication, greatly promoted the anti-wear performance of transmission mechanism 3, thereby extend greatly the service life of machine, effectively reduce the noise of machine.The other end that is connected to the oil inlet pipe on plunger displacement pump is positioned at the bottom of lubricating cavity 4, therefore plunger displacement pump can be evacuated to the lubricating oil absorption that is positioned at lubricating cavity 4 bottoms the oil-out 5b place of plunger displacement pump, flowline sprays away lubricating oil, thereby transmission mechanism 3 is lubricated.
In the design, in utilization, the cam 1a of axle 1 drives plunger displacement pump action, takes full advantage of the kinetic energy that axle 1 rotates.
As another kind of scheme, plunger displacement pump replaces with common oil pump.During work, to oil pump energising, the motor in oil pump is realized oil-feed, fuel-displaced process.
As shown in Figure 2, be also fixed with bracket 15 on plunger displacement pump, flowline is overlapped on bracket 15.Bracket 15 is made by wire.The lower end of bracket 15 is connected in plunger displacement pump upper end.The upper end of bracket 15 is wound with some quoits, and flowline is arranged in quoit.When flowline is flexible pipe, bracket 15 is set on plunger displacement pump, can play positioning action to flowline.