1. A crankshaft of a high-speed warp knitting machine is characterized by comprising a first shaft end, a first fixing platform, a first crankshaft, a second crankshaft, a third crankshaft, a second fixing platform and a second shaft end;

the cross sections of the first shaft end and the second shaft end are circular, a first fixing table is arranged on the right side of the first shaft end, and a second fixing table is arranged on the left side of the second shaft end;

the right side of the first fixed table is connected with a first crankshaft through a first connecting shaft; the left side of the second fixed table is connected with a third crankshaft through a fourth connecting shaft;

the right side of the first crankshaft is connected with a second crankshaft through a second connecting shaft; the right side of the second crankshaft is connected with a third crankshaft through a third connecting shaft.

2. The crankshaft for a high speed warp knitting machine as in claim 1 wherein said first and second shaft ends have equal cross-sectional diameters and coincident axes.

3. The crankshaft for a high speed warp knitting machine according to claims 1 and 2 wherein the first shaft end and/or the second shaft end is provided with a keyway.

4. The crankshaft for a high speed warp knitting machine as in claim 1 wherein said first and second stationary tables are circular in cross section, of equal diameter and of coincident axes.

5. The crankshaft of the high-speed warp knitting machine as claimed in claim 1, wherein the first connecting shaft, the second connecting shaft, the third connecting shaft and the fourth connecting shaft are all circular in cross section and have coincident axes.

6. The crankshaft for a high speed warp knitting machine as claimed in claim 1 wherein the axes of said first shaft end, first stationary table and first connecting shaft coincide.

7. A process for manufacturing a crankshaft of a high-speed warp knitting machine according to any one of claims 1 to 6, wherein the process is a surface treatment of a working surface of the crankshaft, comprising the steps of:

A. cleaning, namely cleaning the cambered surface of the crankshaft needing surface treatment;

B. after deburring and cleaning, deburring the cambered surface of the crankshaft;

C. preheating and preheating the crankshaft;

D. c, nitrocarburizing, namely performing carbonitriding on the crankshaft subjected to waste heat treatment obtained in the step C;

E. air cooling and air cooling;

F. cleaning, cooling air to room temperature, and cleaning;

G. and F, polishing the crankshaft cambered surface cleaned in the step F to improve the surface smoothness.

8. The process for manufacturing a crankshaft of a high-speed warp knitting machine as claimed in claim 7, further comprising a secondary preheating and a secondary carbonitriding step after the polishing step.

Background

China is a large country in textile industry, and textile products such as clothes and the like play an important role in the international market. High speed warp knitting machines are important production equipment in textile manufacturing. The high-speed warp knitting machine is also called as a Tricot (Tricot) warp knitting machine, has high rotating speed, produces more fancy varieties of textiles, has very wide application and has great retention in various medium and large textile factories.

The existing high-speed warp knitting machine adopts the most advanced composite needle-grooved needle, and the speed is very high. During the operation of the high-speed warp knitting machine, the high speed is realized by the motion of the crank shaft. In the process of high-speed movement, the crankshaft rotates at high speed and needs to bear alternating load, so that the requirement on the crankshaft is high to meet the requirement on high-speed alternating load, the work is ensured, and meanwhile, the fatigue damage can be avoided or delayed.

The crankshaft in a high speed warp knitting machine is significantly different from the crankshaft of an internal combustion engine. The crankshaft of the internal combustion engine is converted into rotation through the crankshaft by utilizing the up-and-down motion of the piston; the high-speed warp knitting machine converts rotation into reciprocating motion according to needs through a crankshaft so as to be used for the high-speed warp knitting machine and realize production of textiles. The crankshaft of the high-speed warp knitting machine has the characteristics of the crankshaft, the realized functions and the like.

The working life of the crankshaft in the prior art is also a liftable space. Based on the problems in the prior art and the use requirements of the crankshaft in work, the invention discloses the crankshaft of the high-speed warp knitting machine and the manufacturing process thereof, which can not only meet the requirement of high-speed alternating load for providing power, but also avoid or delay fatigue damage and prolong the service life of the crankshaft.

Disclosure of Invention

The invention aims to provide a casting device of a crankshaft of a high-speed warp knitting machine, which not only can meet the requirement of providing power by high-speed alternating load, but also can avoid or delay fatigue damage and prolong the service life of the crankshaft, so as to solve the technical problems in the prior art and promote the development of the technology.

In order to achieve the purpose, the invention provides the following technical scheme:

a crankshaft of a high-speed warp knitting machine comprises a first shaft end, a first fixing platform, a first crankshaft, a second crankshaft, a third crankshaft, a second fixing platform and a second shaft end;

the cross sections of the first shaft end and the second shaft end are circular, a first fixing table is arranged on the right side of the first shaft end, and a second fixing table is arranged on the left side of the second shaft end;

the right side of the first fixed table is connected with a first crankshaft through a first connecting shaft; the left side of the second fixed table is connected with a third crankshaft through a fourth connecting shaft;

the right side of the first crankshaft is connected with a second crankshaft through a second connecting shaft; the right side of the second crankshaft is connected with a third crankshaft through a third connecting shaft.

Preferably, the first shaft end and the second shaft end have equal cross-sectional diameters, and the axes are coincident.

Preferably, the first shaft end and/or the second shaft end is/are provided with a key groove.

Preferably, the cross sections of the first fixing table and the second fixing table are circular, the diameters of the first fixing table and the second fixing table are equal, and the axes of the first fixing table and the second fixing table are coincident.

Preferably, the cross sections of the first connecting shaft, the second connecting shaft, the third connecting shaft and the fourth connecting shaft are all circular, the diameters of the first connecting shaft, the second connecting shaft, the third connecting shaft and the fourth connecting shaft are equal, and the axes of the first connecting shaft, the second connecting shaft, the third connecting shaft and the fourth connecting shaft are coincident.

Preferably, the axes of the first shaft end, the first fixing table and the first connecting shaft are coincident.

Preferably, the first crankshaft and the second crankshaft have the same cross section and are provided with dynamic balance holes; the axis of the dynamic balance hole is parallel to the axis of the first shaft end.

Preferably, the diameter of the first fixed table is larger than the diameter of the first shaft end.

Preferably, the arc-shaped surfaces of the first crankshaft, the second crankshaft and the third crankshaft are all subjected to surface treatment.

Preferably, the outer edge of the crankshaft is chamfered; the inner edge is processed with round angle to reduce stress concentration and prevent damage.

Preferably, a dynamic balance hole is formed in one side of the convex arc of the first crankshaft and one side of the convex arc of the third crankshaft, so that the dynamic balance of the crankshafts can be guaranteed during dynamic work.

Preferably, the surface treatment is salt bath treatment, and the salt bath treatment comprises the following steps:

A. cleaning, namely cleaning the cambered surface of the crankshaft needing surface treatment;

B. after deburring and cleaning, deburring the cambered surface of the crankshaft;

C. preheating and preheating the crankshaft;

D. c, nitrocarburizing, namely performing carbonitriding on the crankshaft subjected to waste heat treatment obtained in the step C;

E. air cooling and air cooling;

F. cleaning, cooling air to room temperature, and cleaning;

G. and F, polishing the crankshaft cambered surface cleaned in the step F to improve the surface smoothness.

Preferably, after the polishing step, there is further the step of:

H. secondary preheating and preheating treatment of the crankshaft;

I. and D, secondary nitrocarburizing, and performing carbonitriding treatment on the crankshaft cambered surface subjected to secondary preheating in the step H again.

Preferably, after the step I and the secondary carbonitriding, the method further comprises the following steps:

J. oxidizing and carrying out surface oxidation treatment on the crankshaft;

K. hot water cleaning, namely cleaning the crankshaft by adopting hot pure water;

and L, soaking the antirust sealing agent to obtain the final crankshaft of the high-speed warp knitting machine.

The thickness d of the diffusion layer of the cambered surface (working surface) of the crankshaft after the salt bath treatment is 12.3-15.6 microns; surface roughness Ra is 0.6-0.8 micron; the surface Brinell hardness Y is 170-240HB, and particularly, the thickness d of a diffusion layer and the surface roughness Ra meet the condition that d & Ra is more than or equal to 7.6 and less than or equal to 11.5, so that the corrosion resistance, the wear resistance and the service life of the working surface are better improved. The surface Brinell hardness refers to the Brinell hardness of the infiltrated layer.

Preferably, in order to further improve the corrosion resistance, the wear resistance and the service life of the working arc surfaces of the first crankshaft, the second crankshaft and the third crankshaft, the following empirical relationship is satisfied among the seeping layer thickness d, the surface roughness Ra and the surface Brinell hardness Y:

Y＝α·(d²/Ra)；

wherein alpha is a relation coefficient and the value range is 0.62-0.89.

Preferably, the rust removal sealing agent consists of the following components in parts by mass: 42.1-52.6 parts of pure water, 10.2-11.3 parts of aluminum powder, 46-49.5 parts of phosphoric acid, 1.5-2.2 parts of complexing agent, 0.06 part of potassium dichromate and 0.025 part of nickel nitrate.

Preferably, the rust removal sealing agent also comprises 4.6-5.3 parts of tartaric acid, 6.8-7.5 parts of zinc dihydrogen phosphate and 0.3 part of sodium dodecyl benzene sulfonate.

Preferably, the preparation method of the rust removal sealing agent comprises the steps of adding weighed phosphoric acid into aluminum powder, stirring, sequentially adding the complexing agent, the tartaric acid aqueous solution, the zinc dihydrogen phosphate aqueous solution, the sodium dodecyl benzene sulfonate aqueous solution, the potassium dichromate aqueous solution and the nickel nitrate aqueous solution in the stirring process, and uniformly mixing to obtain the metal rust removal and prevention sealing agent. The rust removal sealing agent adopted by the invention can carry out surface rust removal treatment on the working arc surface of the crankshaft, deoils, derusts, phosphorizes and passivates the working surface at room temperature, and can improve the carbonitriding effect and the surface treatment performance.

The invention also discloses a casting device of the warp knitting machine crankshaft, which comprises a device main body, wherein the device main body comprises a base, the top end of the base is rotatably provided with a dragging plate through a dumping mechanism, the top end of the dragging plate is provided with a casting smelting furnace, one side of the casting smelting furnace is provided with a furnace mouth, one side of the casting smelting furnace is provided with a control box, the top end of the dragging plate is provided with a heat preservation mechanism, the dumping mechanism comprises a support rod, bar grooves, trapezoidal grooves, a rotating rod and sliding blocks, the sliding blocks are arranged in the bar grooves in a sliding manner, the top ends of the sliding blocks are rotatably provided with the support rod, one sides of the two sliding blocks, which are close to each other, are provided with a fixed rod, one side of the fixed rod is provided with a rack, the bottom end of the rack is provided with a trapezoidal block, one side of the trapezoidal block is slidably arranged in the trapezoidal grooves, and the inside of the rotating rod is rotatably provided with a gear, one side of the gear is meshed with one side of the rack, a motor is rotatably arranged on one side of the gear, the trapezoidal groove and the sliding block are arranged in the base, and one side of the supporting rod is rotatably connected with one side of the carriage.

Preferably, a conveying belt is arranged on one side of the base, and a casting box is placed at the top end of the conveying belt.

Preferably, the top of conveyer belt is provided with the snap ring, two the inside of snap ring is provided with the fastening cotton.

Preferably, the bottom end of the rack is provided with a trapezoidal block, and one side of the trapezoidal block is slidably mounted in the trapezoidal groove.

Preferably, the heat preservation mechanism includes round bar, connecting rod and cylinder, the lantern ring has been cup jointed in the top of round bar slip, one side of the lantern ring is provided with the connecting rod, the top of round bar is provided with the diaphragm, the top of diaphragm is provided with the cylinder, the bottom of connecting rod is provided with the heated board, threaded spring has been cup jointed in the outside of round bar, one side and the lantern ring of threaded spring are connected, one side and one side of planker of round bar are connected.

Preferably, the two sides of the heat-insulating plate are uniformly provided with butt-joint rods, and the two sides of the casting smelting furnace are uniformly provided with clamping groove plates.

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

1. according to the crankshaft of the high-speed warp knitting machine and the manufacturing process thereof, the arc surfaces of the first crankshaft, the second crankshaft and the third crankshaft are subjected to surface treatment, particularly improved QPQ salt bath treatment is adopted, and the thickness d of a treated seeping layer is 12.3-15.6 microns; surface roughness Ra is 0.6-0.8 micron; the surface Brinell hardness Y is 170-240HB, and particularly, the thickness d of a diffusion layer and the surface roughness Ra meet the condition that d & Ra is more than or equal to 7.6 and less than or equal to 11.5, so that the corrosion resistance, the wear resistance and the service life of the working surface are better improved.

2. According to the crankshaft of the high-speed warp knitting machine and the manufacturing process thereof, the corrosion resistance and the wear resistance of the working cambered surfaces of the first crankshaft, the second crankshaft and the third crankshaft are further improved and the working service life is prolonged by setting the empirical relationship which is satisfied among the thickness d of the penetration layer, the surface roughness Ra and the surface Brinell hardness Y.

3. According to the crankshaft of the high-speed warp knitting machine and the manufacturing process thereof, the dumping mechanism is arranged in the production process, and the supporting rod is pushed to rise, so that one end of the carriage is continuously inclined, the molten metal in the casting and smelting furnace is dumped, the manual dumping mode is replaced, the accuracy of dumping capacity is improved, the danger coefficient is reduced, and the operation efficiency is improved.

4. According to the crankshaft of the high-speed warp knitting machine and the manufacturing process thereof, the heat preservation mechanism is arranged in the production process, the air cylinder contracts upwards, the threaded spring rebounds to lift the lantern ring upwards, normal feeding of the casting smelting furnace is prevented from being influenced, the butt-joint rod is clamped into the clamping groove plate, the heat preservation plate is accurately clamped with the top end of the casting smelting furnace, heat loss is reduced, and energy is greatly saved.

5. According to the crankshaft of the high-speed warp knitting machine and the manufacturing process thereof, the steps of the surface treatment manufacturing process of the working arc surface of the crankshaft are arranged, so that the working arc surface of the crankshaft is better subjected to surface treatment, the corrosion resistance and the wear resistance of the working arc surfaces of the first crankshaft, the second crankshaft and the third crankshaft are improved, and the service life of the working arc surfaces of the first crankshaft, the second crankshaft and the third crankshaft is prolonged.

Drawings

Fig. 1 is a schematic view of a crankshaft of the high speed warp knitting machine of the present invention.

FIG. 2 is a sectional view of a crankshaft A-A of the high speed warp knitting machine of the present invention.

FIG. 3 is a sectional view of a crankshaft B-B of the high speed warp knitting machine of the present invention.

FIG. 4 is a sectional view of a crank shaft C-C of the high speed warp knitting machine of the present invention.

FIG. 5 is a schematic structural diagram of a crankshaft casting device of the high-speed warp knitting machine according to the invention.

FIG. 6 is a side view of the structure of the crankshaft casting device of the high-speed warp knitting machine.

Fig. 7 is a schematic top view of the heat-insulating plate of the casting apparatus of the present invention.

FIG. 8 is a schematic side view of the pouring mechanism of the casting apparatus of the present invention.

In the figure: 1. a first shaft end; 2. a first fixed table; 3. a first connecting shaft; 4. a first crankshaft; 5. a second connecting shaft; 6. a second crankshaft; 7. a third connecting shaft; 8. a third crankshaft; 9. a fourth connecting shaft; 10. a second stationary stage; 11. a second shaft end; 12. a keyway; 13. a dynamic balance hole; 100. a device main body; 110. a base; 120. casting a smelting furnace; 130. a furnace mouth; 140. a control box; 150. a carriage; 160. casting a box; 161. a snap ring; 162. a conveyor belt; 200. a dumping mechanism; 210. a support bar; 211. a strip groove; 212. a slider; 213. a trapezoidal block; 214. a gear; 215. a rack; 216. a motor; 217. fixing the rod; 218. a trapezoidal groove; 219. rotating the rod; 300. a heat preservation mechanism; 310. a thermal insulation board; 311. a connecting rod; 312. a cylinder; 313. a slot clamping plate; 314. a transverse plate; 315. a collar; 316. a threaded spring; 317. a round bar; 318. a docking rod.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1

As shown in fig. 1 to 4, the present invention discloses a crankshaft of a high speed warp knitting machine, which comprises a first shaft end 1, a first fixing table 2, a first crankshaft 4, a second crankshaft 6, a third crankshaft 8, a second fixing table 10 and a second shaft end 11;

the cross sections of the first shaft end 1 and the second shaft end 11 are circular, a first fixing table 2 is arranged on the right side of the first shaft end 1, and a second fixing table 10 is arranged on the left side of the second shaft end 11;

the right side of the first fixed table 2 is connected with a first crankshaft 4 through a first connecting shaft 3; the left side of the second fixing table 10 is connected with a third crankshaft 8 through a fourth connecting shaft 9;

the right side of the first crankshaft 4 is connected with a second crankshaft 6 through a second connecting shaft 5; the right side of the second crankshaft 6 is connected with a third crankshaft 8 through a third connecting shaft 7.

The first shaft end 1 and the second shaft end 11 have equal cross-sectional diameters and have coincident axes. The first shaft end 1 and/or the second shaft end 11 are/is provided with a key groove.

The cross sections of the first fixing table 2 and the second fixing table 10 are circular, the diameters of the first fixing table and the second fixing table are equal, and the axes of the first fixing table and the second fixing table are overlapped. The sections of the first connecting shaft 3, the second connecting shaft 5, the third connecting shaft 7 and the fourth connecting shaft 9 are all circular, the diameters are equal, and the axes are overlapped.

The axes of the first shaft end 1, the first fixing table 2 and the first connecting shaft 3 are coincident. The sections of the first crankshaft 4 and the second crankshaft 6 are the same, and dynamic balance holes are formed in the first crankshaft and the second crankshaft; the axis of the dynamic balance hole is parallel to the axis of the first shaft end 1.

The diameter of the first stationary table 2 is larger than the diameter of the first axial end 1. The arc-shaped surfaces of the first crankshaft 4, the second crankshaft 6 and the third crankshaft 8 are all subjected to surface treatment. Chamfering the outer edge of the crankshaft; the inner edge is processed with round angle to reduce stress concentration and prevent damage.

Example 2

The invention also discloses a manufacturing process of the crankshaft of the high-speed warp knitting machine, which is to perform surface treatment on the working surface of the crankshaft and comprises the following steps:

A. cleaning: cleaning the cambered surface of the crankshaft needing surface treatment;

B. deburring: after cleaning, deburring the cambered surface of the crankshaft;

C. preheating: preheating the crankshaft;

D. nitrocarburizing: c, carbonitriding the crankshaft subjected to waste heat treatment obtained in the step C;

E. air cooling: carrying out air cooling;

F. cleaning: cooling the air to room temperature and then cleaning;

G. polishing: and F, polishing the crankshaft cambered surface cleaned in the step F to improve the surface smoothness.

H. Secondary preheating: preheating the crankshaft;

I. secondary carbonitriding: performing carbonitriding treatment on the cambered surface of the crankshaft again;

oxidizing and carrying out surface oxidation treatment on the crankshaft;

J. and (3) oxidation: carrying out surface oxidation treatment on the crankshaft;

K. and (3) hot water cleaning: cleaning the crankshaft by adopting hot pure water;

and L, soaking the antirust sealing agent to obtain the final crankshaft of the high-speed warp knitting machine.

The thickness d of the diffusion layer of the cambered surface (working surface) of the crankshaft after the salt bath treatment is 12.3-15.6 microns; surface roughness Ra is 0.6-0.8 micron; the surface Brinell hardness Y is 170-240HB, and particularly, the thickness d of a diffusion layer and the surface roughness Ra meet the condition that d & Ra is more than or equal to 7.6 and less than or equal to 11.5, so that the corrosion resistance, the wear resistance and the service life of the working surface are better improved. The surface Brinell hardness refers to the Brinell hardness of the infiltrated layer.

In order to further improve the corrosion resistance, the wear resistance and the service life of the working arc surfaces of the first crankshaft, the second crankshaft and the third crankshaft, the following empirical relationship is satisfied among the seeping layer thickness d, the surface roughness Ra and the surface Brinell hardness Y:

Y＝α·(d²/Ra)；

wherein alpha is a relation coefficient and the value range is 0.62-0.89.

The rust removal sealing agent comprises the following components in parts by mass: 42.1-52.6 parts of pure water, 10.2-11.3 parts of aluminum powder, 46-49.5 parts of phosphoric acid, 1.5-2.2 parts of complexing agent, 0.06 part of potassium dichromate, 0.025 part of nickel nitrate, 4.6-5.3 parts of tartaric acid, 6.8-7.5 parts of zinc dihydrogen phosphate and 0.3 part of sodium dodecyl benzene sulfonate.

The preparation method of the rust removing sealing agent comprises the steps of adding weighed phosphoric acid into aluminum powder, stirring, sequentially adding a complexing agent, a tartaric acid aqueous solution, a zinc dihydrogen phosphate aqueous solution, a sodium dodecyl benzene sulfonate aqueous solution, a potassium dichromate aqueous solution and a nickel nitrate aqueous solution in the stirring process, and uniformly mixing to obtain the metal rust removing and preventing sealing agent. The rust removal sealing agent adopted by the invention can carry out surface rust removal treatment on the working arc surface of the crankshaft, deoils, derusts, phosphorizes and passivates the working surface at room temperature, and can improve the carbonitriding effect and the surface treatment performance.

Example 3

Referring to fig. 5-8, the present invention further discloses a casting device for a crankshaft of a high-speed warp knitting machine, which comprises a device body 100, wherein the device body 100 comprises a base 110, a motor 216 and a cylinder 312 used in the present invention are of commercially available models, and the specific working principle thereof is the prior art known to those skilled in the art, and therefore, the description is not repeated herein, an output end of a control box 140 is electrically connected with an input end of the cylinder 312 and an input end of the motor 216 respectively through a wire, a carriage 150 is rotatably arranged at a top end of the base 110 through a pouring mechanism 200, a casting melting furnace 120 is fixedly arranged at a top end of the carriage 150, a furnace mouth 130 is arranged at one side of the casting melting furnace 120, the control box 140 is fixedly arranged at one side of the casting melting furnace 120, a heat preservation mechanism 300 is arranged at a top end of the carriage 150, the pouring mechanism 200 comprises a support rod 210, a bar groove 211, a trapezoidal groove 218, a rotating rod 219 and a slider 212, the two grooves 211 are internally provided with sliding blocks 212 in a sliding manner, the top ends of the sliding blocks 212 are rotatably provided with supporting rods 210, one sides of the two sliding blocks 212, which are close to each other, are provided with fixing rods 217, one sides of the fixing rods 217 are provided with racks 215, the bottom ends of the racks 215 are provided with trapezoidal blocks 213, one sides of the trapezoidal blocks 213 are slidably mounted in the trapezoidal grooves 218, the inside of the rotating rod 219 is rotatably provided with gears 214, and one sides of the gears 214 are meshed with one sides of the racks 215.

One side of the gear 214 is rotatably provided with a motor 216, a trapezoidal groove 218 and a sliding block 212 are arranged inside the base 110, one side of the supporting rod 210 is rotatably connected with one side of the carriage 150, the motor 216 is started to drive the gear 214 to rotate, the gear 214 drives the rack 215 to move left and right, the rack 215 reciprocates to drive the fixed rod 217 and the sliding block 212 to slide back and forth in the bar groove 211, the supporting rod 210 is pushed to rise, one end of the carriage 150 is continuously inclined, accordingly, the metal smelted inside the casting smelting furnace 120 is poured, a manual pouring mode is replaced, the accuracy of pouring capacity is improved, the danger coefficient is reduced, and the operation efficiency is improved.

A conveyer belt 162 is fixedly arranged on one side of the base 110, the casting box 160 is placed at the top end of the conveyer belt 162, the conveyer belt 162 rotates to drive the casting box 160 to move to the bottom end of the furnace mouth 130 to receive molten metal, and therefore the casting box 160 can cast hockey sticks in order.

Further, the fixed snap ring 161 that is provided with in top of conveyer belt 162, the fixed fastening cotton that is provided with in inside of two snap rings 161, snap ring 161 prevent that casting case 160 from taking place to empty, to the accurate location of casting case 160, the inside fastening cotton plays the fixed effect of centre gripping to casting case 160.

The bottom end of the rack 215 is fixedly provided with a trapezoidal block 213, one side of the trapezoidal block 213 is slidably mounted in the trapezoidal groove 218, the trapezoidal block 213 slides back and forth in the trapezoidal groove 218, the moving stability of the rack 215 is improved, and the rack 215 and the gear 214 are always kept in a clamping state.

The heat preservation mechanism 300 comprises a round rod 317, a connecting rod 311 and a cylinder 312, a lantern ring 315 is sleeved on the top end of the round rod 317 in a sliding mode, a connecting rod 311 is fixedly arranged on one side of the lantern ring 315, a transverse plate 314 is fixedly arranged on the top end of the round rod 317, a cylinder 312 is fixedly arranged on the top end of the transverse plate 314, a heat preservation plate 310 is fixedly arranged at the bottom end of the connecting rod 311, a thread spring 316 is sleeved on the outer side of the round rod 317, one side of the thread spring 316 is fixedly connected with the lantern ring 315, one side of the round rod 317 is fixedly connected with one side of a carriage 150, the cylinder 312 stretches and presses the connecting rod 311 downwards, the thread spring 316 is extruded by the lantern ring 315 on one side of the connecting rod 311, the heat preservation plate 310 is clamped on the casting smelting furnace 120, the cylinder 312 is shortened, the thread spring 316 rebounds to upwards support the lantern ring 315, the heat preservation plate 310 is bounced above the casting smelting furnace 120, and normal feeding of the casting smelting furnace 120 is not affected.

The butt-joint rods 318 are uniformly and fixedly arranged on two sides of the heat insulation plate 310, the clamping groove plates 313 are uniformly arranged on two sides of the casting smelting furnace 120, and the butt-joint rods 318 are clamped into the clamping groove plates 313, so that the heat insulation plate 310 is accurately clamped with the top end of the casting smelting furnace 120, and heat loss is reduced.

The working principle is as follows: the motor 216 is started to drive the gear 214 to rotate, the gear 214 drives the rack 215 to move left and right, the rack 215 reciprocates to drive the fixed rod 217 and the sliding block 212 to slide back and forth in the strip groove 211, the supporting rod 210 is pushed to rise, and one end of the planker 150 is continuously inclined, so that the molten metal in the casting and smelting furnace 120 is poured.

Cylinder 312 is tensile to push down connecting rod 311, and connecting rod 311 one side is passed through lantern ring 315 extrusion thread spring 316 for heated board 310 card is on casting smelting furnace 120, and butt joint pole 318 card is gone into the inside to draw-in groove board 313, makes the accurate block in heated board 310 and casting smelting furnace 120's top, reduces thermal scattering and disappearing, and cylinder 312 shortens, and thread spring 316 kick-backs and upwards holds up lantern ring 315, and heated board 310 plays casting smelting furnace 120 top, does not influence the normal material loading of casting smelting furnace 120.

Example 4

In order to verify the performance of the crankshaft of the high-speed warp knitting machine, the crankshaft of the traditional high-speed warp knitting machine and the crankshaft of the warp knitting machine adopting the technical scheme of the invention are adopted for test comparison:

in the above test, the size and structure of the crankshaft, the working environment and the used part are the same, and 10 conventional crankshafts and 10 crankshafts in the technical scheme of the invention are adopted to record the continuous working time when the crankshaft has a working fault. Tests show that the continuous working time of the crankshaft in the technical scheme of the invention is improved by 15-26.5% compared with the conventional crankshaft when working failure occurs.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.