CN116176717A - Track shoe, preparation method thereof, and tracked engineering vehicle - Google Patents

Abstract

The invention relates to the field of engineering machinery, in particular to a track shoe, a preparation method thereof, and a track-type engineering vehicle comprising the track shoe. The crawler shoe includes a crawler shoe and at least one shoe shoe. The material of the shoe shoe is a composite organic material, and the shoe shoe is made of metal. The track shoe of the present invention includes crawler bottom plates and spurs made of different materials. The track bottom plate is made of composite organic materials, and the track shoes are made of metal materials, which can not only improve the toughness of the track shoes, reduce the risk of impact fracture, but also be able to withstand ground Friction and wear and impact force.

Description

Track shoe, preparation method thereof, and tracked engineering vehicle

technical field

The invention relates to the field of construction machinery, in particular to a track shoe, a preparation method thereof and a track-type engineering vehicle comprising the track shoe.

Background technique

The crawler-type walking device relies on two closed and parallel rotating crawlers to move the working vehicle, has good passability and maneuverability, does not need to lay or prepare roads, and can pass through shoals, narrow ditches and other obstacles; in the field of construction machinery, digging Crawlers, rotary excavators, milling machines, pavers and other crawler equipment mostly use combined crawlers, which are mainly composed of chain rails, track shoes, track bolts, pin shafts and pin sleeves.

Track shoes are the core components of combined tracks. At present, in the field of construction machinery, track shoes are mainly made of high-manganese steel, medium-manganese steel and low-alloy high-strength steel through stamping, forging or casting processes. They have high strength. , high load, wear resistance and other advantages, but its toughness is poor, easy to break under force, poor vibration damping performance, poor comfort of equipment, damage to the road surface, not corrosion resistant and other shortcomings.

Therefore, it is very important to find a track shoe with toughness that is not easy to break and is suitable for various working conditions.

Contents of the invention

The object of the present invention is to overcome the above-mentioned problems in the prior art, and provide a track shoe, a preparation method thereof, and a track-type engineering vehicle including the track shoe. The track shoe of the present invention includes crawler bottom plates and spurs of different materials. The track bottom plate is made of composite organic materials, and the track shoes are made of metal materials, which can not only improve the toughness of the track shoes, reduce the risk of impact fracture, but also be able to withstand ground Friction wear and impact force.

The track shoe is the core component of the combined track. The inventors of the present invention have found through simulated force analysis that the main function of the track shoe is to bear the weight of the equipment and transmit it to the ground, and at the same time ensure that the working vehicle can exert sufficient traction. It is to transmit the weight and traction of the equipment, and the load is relatively small. Therefore, the inventor of the present invention uses a composite organic material as the crawler bottom plate, and uses a metal material as the track spine; the composite organic material is used as the crawler bottom plate, which has sufficient bearing capacity and It can improve the toughness of the crawler floor, reduce the risk of impact fracture, improve the vibration damping performance, and improve the comfort of the crawler equipment; use metal materials as the spurs, which can withstand the friction, wear and impact of the ground, and further expand the track equipment. application scenarios.

The first aspect of the present invention provides a track shoe. The track shoe includes a track bottom plate and at least one shoe spur. The material of the track shoe is a composite organic material, and the material of the shoe shoe is metal.

In one example, the composite organic material includes at least one of polyamide, epoxy resin, phenolic resin and polyurethane elastomer.

In one example, each of the thorns is divided into 1-10 thorn segments, and the ratio of the size of the interval between two adjacent thorn segments to the length of the thorn segments is 1:( 1.5-40).

In one example, each of the thorns is divided into 2-5 thorns, and the ratio of the size of the interval between two adjacent thorns to the length of the thorns is 1:( 5-15).

In one example, the track shoe is integrally formed; or, the track bottom plate and the shoe bar are detachably connected.

The second aspect of the present invention provides a method for preparing the track shoe according to the first aspect of the present invention, the method is an integral molding method or a partial connection method; wherein, the integral molding method at least includes the following steps:

(A1) process the thorns, and put the thorns into the track shoe mold for positioning;

(A2) preparing an organic slurry, the organic slurry is the first organic slurry or the second organic slurry;

(A3) adding the organic slurry obtained in step (A2) into the track shoe mold for polymerization, demoulding, and heat treatment;

The branch connection method at least includes the following steps:

(B1) preparing the organic slurry;

(B2) adding the organic slurry obtained in step (B1) into a crawler floor mold for polymerization, demoulding, and heat treatment to obtain a crawler floor;

(B3) Connect the track base and the spurs.

In one example, the first organic slurry includes a polymer monomer, a catalyst, a first activator, and optional toner; the second organic slurry includes a prepolymer, a crosslinking agent, a second activated agent and optional toner; or,

In the first organic slurry, relative to 100 parts by weight of the polymer monomer, the content of the catalyst is 0.05-1 parts by weight, the content of the first activator is 0.1-2 parts by weight and any The content of the selected toner is 0-1 parts by weight;

In the second organic slurry, relative to 100 parts by weight of the prepolymer, the content of the crosslinking agent is 0.01-50 parts by weight, the content of the second activator is 0.01-2 parts by weight and Optionally, the content of the toner is 0-1 parts by weight.

In one example, the step (A1) further includes preheating the track shoe mold and the shoe shoe to 80°C-170°C; the polymerization conditions in the step (A3) include adding the organic pulp obtained in the step (A2) Put the material into the track shoe mold at 80°C-170°C, seal it, the temperature of the polymerization is 80°C-170°C, and the time of the polymerization is 10min-120min; in step (A3), the conditions of the heat treatment The temperature including the heat treatment is 80°C-170°C, and the heat treatment time is 4h-12h.

In one example, in step (B2), the polymerization conditions include adding the organic slurry obtained in step (B1) to the crawler shoe mold at 80°C-170°C, sealing the mold, and the polymerization temperature is 80 °C-170°C, the polymerization time is 10min-120min; in step (B2), the heat treatment conditions include that the heat treatment temperature is 80°C-170°C, and the heat treatment time is 4h-12h.

The third aspect of the present invention provides a tracked engineering vehicle, which includes the track shoe according to the first aspect of the present invention or the track shoe prepared by the method described in the second aspect of the present invention.

Through the above technical solution, the present invention has at least the following advantages compared with the prior art:

(1) The track shoe of the present invention includes crawler shoe and spurs of different materials, the track shoe is made of composite organic material, and the shoe shoe is made of metal material, which can not only improve the toughness of the track shoe, reduce the risk of impact fracture, but also Withstand the friction and wear of the ground and the impact force;

(2) The crawler shoe of the present invention is integrally formed, and there is no need to connect the crawler shoe and the spurs, the process is simple, and the production cost of the track shoe can be significantly reduced;

(3) The crawler shoe of the present invention is obtained through a detachable connection between the crawler shoe and the crawler spine, and the crawler spine can be replaced after the crawler spine is worn and broken, thereby reducing the use cost of the customer.

Neither the endpoints nor any values of the ranges disclosed herein are limited to such precise ranges or values, and these ranges or values are understood to include values approaching these ranges or values. For numerical ranges, between the endpoints of each range, between the endpoints of each range and individual point values, and between individual point values can be combined with each other to obtain one or more new numerical ranges, these values Ranges should be considered as specifically disclosed herein.

Description of drawings

Figure 1 is a top view of the track shoe in an example of the present invention.

Fig. 2 is a top view of the track shoe in an example of the present invention.

Fig. 3 is a schematic diagram of the track shoe (integrated molding) in an example of the present invention.

Figure 4 is a schematic diagram of the track shoe (bolted connection) in an example of the present invention.

Fig. 5 is a cross-sectional view of the spur along the long side of the track shoe in an example of the present invention.

Fig. 6 is a top view of the crawler shoe in an example of the present invention.

Fig. 7 is a schematic diagram of an excavator below 20 tons described in an example of the present invention.

Detailed ways

Specific embodiments of the present invention will be described in detail below. It should be understood that the specific embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

The first aspect of the present invention provides a track shoe, and the track shoe may include a track bottom plate and at least one shoe shoe (for example, one shoe shoe, two shoe shoes, three shoe shoes or four shoe shoes), the track shoe The material of the bottom plate may be composite organic material, and the material of the shoes may be metal.

In the present invention, the structure of the track shoe is the same or similar to that conventionally used in the field. For example, the track shoe is also provided with chain rail mounting holes and glue mounting holes, as shown in FIG. 1 It is a top view of the track shoe in an example of the present invention. In FIG. 1, the track shoe includes a track shoe 1 and two shoe spines 2 arranged on the track shoe 1, and the two shoe spines 2 are parallel to each other. The strip structure is arranged on the track base plate 1 along the length direction, and the track base plate 1 is covered in the length direction. At the same time, a number of chain rail mounting holes 3 and glue-hanging mounting holes are provided on the track base plate 1 4.

In the present invention, the shapes and relative positions of the crawler shoe and the shoe spine are the same or similar to those of conventional track shoes in the field.

The inventors of the present invention have found through simulated force analysis that the main function of the track shoes is to bear the weight of the equipment and transmit it to the ground, and at the same time ensure that the working vehicle can exert sufficient traction. Therefore, the track shoes mainly transmit the weight and traction of the equipment. The inventors of the present invention found that by using the composite organic material as the crawler bottom plate, it can not only improve the poor toughness of the metal track bottom plate, easy to break under force, poor vibration damping performance, poor equipment comfort, and damage. With many shortcomings such as road surface and corrosion resistance, it can also provide sufficient bearing capacity. On the premise of ensuring the weight and traction of the transmission equipment, it can effectively improve the toughness of the track floor, reduce the risk of impact fracture, and improve the vibration damping performance. Improve the comfort of crawler equipment; by using metal materials as thorns, this can make up for the shortcomings of the poor wear resistance of composite organic material track shoes, so that the track shoes can withstand the friction, wear and impact of the ground, and further expand the scope of track equipment. Application scenarios.

In an example, the composite organic material may include at least one of polyamide, epoxy resin, phenolic resin, and polyurethane elastomer.

Since epoxy resin and phenolic resin have the characteristics of high strength, load resistance and easy molding, but their toughness is poor, while polyurethane elastomer has the characteristics of high toughness, but its strength is low, so it can be designed to use polyurethane elastomer for toughening Epoxy resin and phenolic resin to prepare track shoes with high strength, load resistance and impact resistance.

Since the material strength and toughness of polyamide are higher than those of epoxy resin modified by polyurethane elastomer and phenolic resin modified by polyurethane elastomer, when polyamide is included in the composite organic material, it can be further improved. Toughness of the track floor.

In one example, the composite organic material includes polyamide.

In the present invention, the metal can be the metal conventionally used in the field for manufacturing track shoes, for example, high manganese steel, medium manganese steel, low alloy high strength steel, ductile iron, aluminum alloy and aluminum matrix composite material.

In the present invention, the shoes can be purchased commercially, or shaped by forging or casting. In an example of the present invention, the spurs are formed by forging process, and strengthened by solid solution strengthening, aging strengthening, fine grain strengthening and deformation strengthening, so as to improve the strength, wear resistance and impact toughness of the spurs. .

Due to its high hardness, the metal material is easy to break under the condition of unbalanced force. The inventors of the present invention found that if a metal thorn is divided into several sections, the toughness of the composite organic material crawler floor can be used. Buffer the unbalanced force of the metal stalks, so as to further reduce the risk of metal stalks breaking.

In one example, each of the thorns can be divided into 1-10 thorn segments, such as 1, 2, 3, 4, 5, 6, 7, 8, 9 or 10.

In one example, each shoe shoe is divided into 2-5 shoe shoe segments.

In the present invention, each of the thorns can be equally divided into several thorn sections, that is, each of the thorn sections has the same length; each of the thorns can also be divided into several thorn sections The thorn section, that is, the length of each thorn section is different.

In an example, the ratio of the size of the space between two adjacent shoe segments to the length of the shoe segments may be 1: (1.5-40), such as 1:1.5, 1:2, 1 :3, 1:4, 1:5, 1:6, 1:7, 1:8, 1:9, 1:10, 1:11, 1:12, 1:13, 1:14, 1:15 , 1:16, 1:17, 1:18, 1:19, 1:20, 1:21, 1:22, 1:23, 1:24, 1:25, 1:26, 1:27, 1 :28, 1:29, 1:30, 1:31, 1:32, 1:33, 1:34, 1:35, 1:36, 1:37, 1:38, 1:39 or 1:40 .

In an example, the ratio of the space between two adjacent shoe segments to the length of the shoe segments is 1:(2-20).

In one example, the ratio of the space between two adjacent shoe segments to the length of the shoe segments is 1:(5-15).

Exemplarily, the total length of the track shoe is 400 mm, and five thorn sections with a length of 76 mm are used, and the distance between the thorn sections is 5 mm; the total length of the track shoe is 400 mm, and three burr sections with a length of 90 mm , 190mm and 90mm thorn sections, the distance between the thorn sections is 15mm.

In the present invention, the size of the interval between two adjacent shoe segments refers to the size between adjacent two ends of two adjacent shoe segments.

For example, as shown in Figure 2, it is a top view of the track shoe described in an example of the present invention. In Figure 2, the track shoe includes 2 shoe spines 2, and each shoe shoe 2 is divided into 3 shoe spine sections, and two adjacent shoe spines The size of the interval between the thorn sections is "d" marked in the figure, and the length of the thorn section is "l" marked in the figure.

In the present invention, the track shoe can be integrally formed, that is, the track shoe is formed through an integral molding process, and there is no need to connect the track shoe and the shoe bar. The advantage of this is that the process is simple, The production cost of the track shoe can be significantly reduced; the track shoe can also be connected after the parts are processed separately, that is, the track shoe and the spur of the track shoe are processed separately and then connected. The biggest advantage is that it is convenient to replace the shoe bar after it is worn and broken, which can reduce the customer's use cost; therefore, it can be selected according to actual needs.

In one example, the track shoes are integrally formed. For example, as shown in Figure 3, it is a schematic diagram of the track shoe (integrated molding) described in an example of the present invention, wherein Figure 3 (a) is a top view, Figure 3 (b) is a bottom view, and Figure 3 (c) is a left view .

In one example, the crawler shoe and the shoe are detachably connected. For example, as shown in Figure 4, it is a schematic diagram of the track shoe (bolted connection) described in an example of the present invention, wherein Figure 4 (a) is a top view, Figure 4 (b) is a bottom view, and Figure 4 (c) is a left view , in FIG. 4( b ), the crawler shoe and the shoe are connected by connecting bolts 5 .

In the present invention, the detachable connection has a conventional meaning in the field, for example, the detachable connection may be a bolt connection.

The track shoe of the present invention includes track bottom plates and spurs of different materials, wherein the track bottom plate is composed of composite organic materials, and the track shoes are made of metal materials, which can not only improve the toughness of the track shoes, reduce the risk of impact fracture, but also be able to withstand the friction and wear of the ground and impact force, adapting to a variety of application scenarios; further, the shoe included in the track shoe of the present invention can be divided into several shoe sections, which can reduce the risk of metal shoe fracture.

The second aspect of the present invention provides a method for preparing the track shoe according to the first aspect of the present invention, and the method may be an integral molding method or a segmented connection method.

When the method is an integral molding method, at least the following steps are included:

(A1) process the thorns, and put the thorns into the track shoe mold for positioning;

(A2) preparing an organic slurry, which can be the first organic slurry or the second organic slurry;

(A3) adding the organic slurry obtained in step (A2) into the track shoe mold for polymerization, demoulding, and heat treatment.

In the present invention, in the step (A1), the processing of the shoe is to process the shoe according to a specific design according to the integral molding method, the shoe includes a through hole, and the through hole The holes can be rectangular holes or oblong holes, and the number of said through holes can be 1, 2 or more. For example, as shown in FIG. 5 , which is a cross-sectional view of the shoe along the long side of the track shoe in an example of the present invention, the shoe has a through hole; the integral molding method can refer to the prior art.

In the present invention, the step (A1) further includes preheating the track shoe mold and the shoes to 80°C-170°C.

In the present invention, the positioning in step (A1) refers to putting the shoe bar into the groove of the track shoe mold and fixing it.

In the present invention, the first organic slurry may include a polymer monomer, a catalyst, a first activator and optionally a toner. The second organic paste may include a prepolymer, a crosslinker, a second activator, and optionally a toner.

In one example, in the first organic slurry, relative to 100 parts by weight of the polymer monomer, the content of the catalyst is 0.05-1 part by weight, and the content of the first activator is 0.1-1 part by weight. 2 parts by weight and optionally the content of the toner is 0-1 parts by weight.

In one example, in the second organic slurry, relative to 100 parts by weight of the prepolymer, the content of the crosslinking agent is 0.01-50 parts by weight, and the content of the activator is 0.01-2 The content of parts by weight and optional toner is 0-1 part by weight.

In one example, the polymer monomer is caprolactam.

In one example, the prepolymer is selected from at least one of epoxy resin E54, epoxy resin E51, epoxy resin E44, liquid phenolic resin, TDI-terminated polyester polyol and MDI-terminated polyester polyol . Wherein, the liquid phenolic resin is a liquid phenolic resin with a viscosity of 500-1000 mPa·s.

In one example, the catalyst is at least one selected from alkali metals, alkali metal hydrides and strong bases.

In one example, the basic metal is at least one selected from Li, Na, K and Ca.

In one example, the strong base is at least one selected from LiOH, NaOH and KOH.

In one example, the crosslinking agent is selected from at least one of hexamethylenetetramine, aromatic diprimary amine small molecule compounds and aliphatic polyol small molecule compounds.

For example, the aromatic diprimary amine small molecule compound is selected from 3,3'-diaminodiphenylsulfone (DDS), diaminodiphenylmethane (MDA), 2-methyl-4-methoxydiphenylamine (DPA ), 4,4'-diamino-3,3'-dichlorodiphenylmethane (MOCA) and 4,4'-methylenebis(3-chloro-2,6-diethylaniline) (M - at least one of CDEA). For example, the aliphatic polyol small molecule compound is 1,4-butanediol (BDO).

In the present invention, the first activator and the second activator are the same or different, each independently selected from at least one of isocyanate compounds and tertiary amine small molecule compounds.

For example, the isocyanate compound is selected from diphenylmethane diisocyanate (MDI), toluene diisocyanate (TDI), hexamethylene diisocyanate (HDI), isophorone diisocyanate (IPDI), 1,5-naphthalene diisocyanate At least one of isocyanate (NDI), polymeric MDI and liquefied MDI. For example, the tertiary amine small molecule compound is selected from 1,8-diazacycloundec-7-ene (DBU), 2,4,6-tris(dimethylaminomethyl)phenol (DMP-30) , N,N-dimethylaniline (BDMA) and at least one of imidazole compounds.

In the present invention, in step (A2), preparing the first organic slurry includes at least the following steps:

(C1) Add the polymer monomer and the optional toner into the reaction vessel, heat and melt, and after the temperature of the material in the reaction vessel rises to 110°C-130°C, perform vacuum dehydration for 10min-45min;

(C2) Add the catalyst, vacuum dehydrate for 10min-45min, and add the first activator.

In the present invention, in step (A2), the preparation of the second organic slurry includes at least the following steps: mixing the prepolymer, the crosslinking agent, the second activator and the optional color Add the powder into the reaction container, and carry out vacuum degassing at 40°C-80°C for 10min-45min.

In the present invention, in step (A3), the polymerization conditions include adding the organic slurry obtained in step (A2) into the track shoe mold at 80°C-170°C, sealing it, and placing the track shoe mold Put it into a constant temperature oven at 80°C-170°C, and the polymerization time is 10min-120min.

In the present invention, in step (A3), the heat treatment conditions include placing the demoulded track shoes in an oven at 80°C-170°C for 4h-12h, closing the oven, and freely cooling to room temperature.

When the method is a branch connection method, at least the following steps are included:

(B1) preparing the organic slurry;

(B2) adding the organic slurry obtained in step (B1) into a crawler floor mold for polymerization, demoulding, and heat treatment to obtain a crawler floor;

(B3) Connect the track base and the spurs.

In the present invention, in the step (B2), the polymerization conditions include adding the organic slurry obtained in the step (B1) into the mold of the crawler floor at 80°C-170°C, sealing it, and placing the mold of the crawler floor Put it into a constant temperature oven at 80°C-170°C, and the polymerization time is 10min-120min.

In the present invention, in step (B2), the conditions of the heat treatment include placing the demoulded track base in an oven at 80°C-170°C, the heat treatment time is 4h-12h, closing the oven, and freely cooling to room temperature.

In the present invention, the step (B2) further includes processing the mounting holes after the heat treatment to obtain the crawler bottom plate, as shown in FIG. 6 , which is a top view of the crawler bottom plate in an example of the present invention.

In the segment connection method of the present invention, the spurs can be obtained through processing or commercially, both of which can achieve the technical effect of the present invention.

The third aspect of the present invention provides a tracked engineering vehicle, which includes the track shoe according to the first aspect of the present invention or the track shoe prepared by the method described in the second aspect of the present invention.

In the present invention, the crawler-type engineering vehicle is, for example, an excavator below 20 tons, and FIG. 7 is a schematic diagram of an excavator below 20 tons in an example of the present invention.

The present invention will be described in detail below by way of examples. The described embodiments of the present invention are only a part of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

In the following examples, unless otherwise specified, all materials used are commercially available analytically pure.

Example 1

The track shoe is prepared by integral molding method, and the specific preparation method is as follows:

(1) Process the thorns (high manganese steel) as shown in Figure 5. After the processing is completed, put the thorns into the groove of the track shoe mold, place the track shoe mold and the track shoe The thorns in the mold groove are preheated to 130°C;

(2) Add caprolactam and black toner into the reaction kettle according to the mass ratio of 100:0.5, heat and melt, after the temperature of the material in the reaction kettle rises to 120°C, vacuum dehydrate for 30 minutes, then add LiOH, vacuum dehydrate for 30 minutes, and then add Diphenylmethane diisocyanate (MDI), wherein the mass ratio of the LiOH, the diphenylmethane diisocyanate (MDI) and the caprolactam is 0.5:1:100;

(3) Add the organic slurry obtained in step (2) into the track shoe mold at 130°C, seal it, and then put the track shoe mold in a constant temperature oven at 130°C, polymerize for 70 minutes, and demould. The final track shoes were placed in an oven at 130°C, heat treated for 8 hours, the oven was closed, and allowed to cool down to room temperature.

Get the track shoe shown in Figure 1.

Example 2

The track shoe is prepared by integral molding method, and the specific preparation method is as follows:

(1) Process the thorn section (high manganese steel) as shown in Figure 5. After the processing is completed, put the thorn section into the groove of the track shoe mold, place the track shoe mold and the Preheat the shoe section in the track shoe mold groove to 130°C;

(2) Add caprolactam and black toner into the reaction kettle according to the mass ratio of 100:0.5, heat and melt, after the temperature of the material in the reaction kettle rises to 120°C, vacuum dehydrate for 30 minutes, then add LiOH, vacuum dehydrate for 30 minutes, and then add Diphenylmethane diisocyanate (MDI), wherein the mass ratio of the LiOH, the diphenylmethane diisocyanate (MDI) and the caprolactam is 0.5:1:100;

(3) Add the organic slurry obtained in step (2) into the track shoe mold at 130°C, seal it, and then put the track shoe mold in a constant temperature oven at 130°C, polymerize for 70 minutes, and demould. The final track shoes were placed in an oven at 130°C, heat-treated for 6 hours, closed the oven, and cooled freely to room temperature.

Among them, the total length of the track is 400mm, the lengths of the spur segments are 95mm, 190mm, and 95mm, and the distance between two adjacent spur segments is 10, and the track shoe shown in Figure 2 is obtained.

Example 3

The track shoe is prepared by integral molding method, and the specific preparation method is as follows:

(1) Process the thorn section (medium manganese steel) as shown in Figure 5. After the processing is completed, put the thorn section into the groove of the track shoe mold, place the track shoe mold and the The shoe section in the track shoe mold groove is preheated to 100°C;

(2) Add caprolactam into the reaction kettle, heat and melt, after the temperature of the material in the reaction kettle rises to 110°C, vacuum dehydrate for 45min, then add NaOH, vacuum dehydrate for 45min, then add toluene diisocyanate (TDI), wherein, The mass ratio of NaOH, the toluene diisocyanate (TDI) and the caprolactam is 0.05:0.1:100;

(3) Add the organic slurry obtained in step (2) into the track shoe mold at 100°C, seal it, and then put the track shoe mold in a constant temperature oven at 100°C, polymerize for 100min, and demould. The final track shoes were placed in an oven at 100°C, heat-treated for 10 hours, closed the oven, and cooled freely to room temperature.

Among them, the total length of the track is 400mm, the lengths of the spur segments are 100mm, 190mm, and 100mm, and the distance between two adjacent spur segments is 5, and the track shoe shown in Figure 2 is obtained.

Example 4

The track shoe is prepared by integral molding method, and the specific preparation method is as follows:

(1) Process the thorn section (ductile iron) as shown in Figure 5. After the processing is completed, put the thorn section into the groove of the track shoe mold, and place the track shoe mold and the track shoe mold The shoe section in the plate mold groove is preheated to 170°C;

(2) Add caprolactam and black toner into the reaction kettle according to the mass ratio of 100:1, heat and melt, after the temperature of the material in the reaction kettle rises to 130°C, vacuum dehydrate for 20 minutes, then add KOH, vacuum dehydrate for 20 minutes, then add Isophorone diisocyanate (IPDI), wherein the mass ratio of the KOH, the isophorone diisocyanate (IPDI) and the caprolactam is 1:2:100;

(3) Add the organic slurry obtained in step (2) into the track shoe mold at 170°C, seal it, then put the track shoe mold in a constant temperature oven at 170°C, polymerize for 30 minutes, and demould. The final track shoes were placed in an oven at 170°C, heat-treated for 6 hours, closed the oven, and cooled freely to room temperature.

Among them, the total length of the track is 400mm, the lengths of the spur segments are 90mm, 190mm, and 90mm, and the distance between two adjacent spur segments is 15, and the track shoe shown in Figure 2 is obtained.

Example 5

The track shoe was prepared by segment connection method, and the specific preparation method was as follows:

(1) Add caprolactam and black toner into the reaction kettle according to the mass ratio of 100:0.5, heat and melt, after the temperature of the material in the reaction kettle rises to 120°C, vacuum dehydrate for 30 minutes, then add LiOH, vacuum dehydrate for 30 minutes, then add Diphenylmethane diisocyanate (MDI), wherein the mass ratio of the LiOH, the diphenylmethane diisocyanate (MDI) and the caprolactam is 0.5:1:100;

(2) Add the organic slurry obtained in step (1) into the crawler base mold at 130°C, seal it, then put the crawler base mold into a constant temperature oven at 130°C, polymerize for 70 minutes, and demould. The final crawler bottom plate is placed in an oven at 130°C, heat-treated for 8 hours, the oven is closed, and allowed to cool to room temperature, and then the mounting holes are processed;

(3) Process the thorns (high manganese steel), and process the threaded holes, and connect the track bottom plate and the thorns through bolts.

Get the track shoe shown in Figure 1.

Example 6

The track shoe was prepared by segment connection method, and the specific preparation method was as follows:

(1) Add caprolactam and black toner into the reaction kettle according to the mass ratio of 100:0.5, heat and melt, after the temperature of the material in the reaction kettle rises to 120°C, vacuum dehydrate for 30 minutes, then add LiOH, vacuum dehydrate for 30 minutes, then add Diphenylmethane diisocyanate (MDI), wherein the mass ratio of the LiOH, the diphenylmethane diisocyanate (MDI) and the caprolactam is 0.5:1:100;

(2) Add the organic slurry obtained in step (1) into the crawler base mold at 130°C, seal it, then put the crawler base mold into a constant temperature oven at 130°C, polymerize for 70 minutes, and demould. The final crawler bottom plate is placed in an oven at 130°C, heat-treated for 8 hours, the oven is closed, and allowed to cool to room temperature, and then the mounting holes are processed;

(3) Process the thorn section (high manganese steel), and process threaded holes, and connect the track bottom plate and the thorn section through bolts.

Among them, the total length of the track is 400mm, the lengths of the spur segments are 95mm, 190mm, and 95mm, and the distance between two adjacent spur segments is 10, and the track shoe shown in Figure 2 is obtained.

Example 7

The track shoe is prepared by integral molding method, and the specific preparation method is as follows:

(1) Process the thorn section (high manganese steel) as shown in Figure 5. After the processing is completed, put the thorn section into the groove of the track shoe mold, place the track shoe mold and the Preheat the shoe section in the track shoe mold groove to 130°C;

(2) Add caprolactam and black toner into the reaction kettle according to the mass ratio of 100:0.5, heat and melt, after the temperature of the material in the reaction kettle rises to 120°C, vacuum dehydrate for 30 minutes, then add LiOH, vacuum dehydrate for 30 minutes, and then add Diphenylmethane diisocyanate (MDI), wherein the mass ratio of the LiOH, the diphenylmethane diisocyanate (MDI) and the caprolactam is 0.5:1:100;

(3) Add the organic slurry obtained in step (2) into the track shoe mold at 130°C, seal it, and then put the track shoe mold in a constant temperature oven at 130°C, polymerize for 70 minutes, and demould. The final track shoes were placed in an oven at 130°C, heat-treated for 6 hours, closed the oven, and cooled freely to room temperature.

Among them, the total length of the track is 400mm, the lengths of the spur sections are 95mm, 90mm, 90mm, and 95mm, and the distance between two adjacent spur sections is 10, so that four spur section structure track shoes are obtained.

Example 8

The track shoe is prepared by integral molding method, and the specific preparation method is as follows:

(1) Process the thorn section (high manganese steel) as shown in Figure 5. After the processing is completed, put the thorn section into the groove of the track shoe mold, place the track shoe mold and the Preheat the shoe section in the track shoe mold groove to 130°C;

(2) Epoxy resin E51, diaminodiphenylmethane (MDA), MDI-terminated polyester polyol (PTMEG-MDI) (NCO% is 5%) and 2,4,6-tris(dimethylamino) Methyl)phenol (DMP-30) was mixed according to the mass ratio of 100:20:20:1, and vacuum defoaming was carried out at 60°C for 30min;

(3) Add the organic slurry obtained in step (2) into the track shoe mold at 130°C, seal it, and then put the track shoe mold in a constant temperature oven at 130°C, polymerize for 70 minutes, and demould. The final track shoes were placed in an oven at 130°C, heat-treated for 6 hours, closed the oven, and cooled freely to room temperature.

Among them, the total length of the track is 400mm, the lengths of the spur segments are 95mm, 190mm, and 95mm, and the distance between two adjacent spur segments is 10, and the track shoe shown in Figure 2 is obtained.

Comparative example 1

Conventional high manganese steel track shoes are manufactured by one-piece forging process (that is, the spurs and the track bottom plate are integrally formed), and the spurs are not segmented.

test case

(1) Maximum bending deformation test

The specific test method is as follows:

The track shoes of the embodiment and the comparative example were installed on the test stand by bolts, pressure was applied on the edge of the track shoe until the track shoe was broken (broken or irrecoverable bending), the maximum allowable bending deformation of the track shoe was recorded, and the test results were recorded in Table 1.

(2) Impact test

The specific test method is as follows:

The crawler shoes of the embodiment and the comparative example are installed on the test stand by bolts, and an impact force is applied to destroy the track shoe (fracture or bend) at the edge of the track shoe, and the impact speed is 1m/s. The impact failure mode of the track shoe is recorded, and the test result is recorded in Table 1.

(3) Vibration test

The specific test method is as follows:

Install the crawlers of the embodiment and the comparative example on the construction machinery equipment, and the construction machinery equipment walks at the maximum speed. At 1m of the equipment, feel the ground vibration, and record the test results in Table 1.

Table 1

As can be seen from Table 1, compared with the track shoe of the comparative example, the maximum bending deformation of the track shoe of the present invention is significantly improved, and the highest bending deformation can reach 15%; the track shoe is not broken in the impact test, which significantly improves the performance of the track shoe Toughness reduces the risk of impact fracture; in the vibration test, the ground vibration intensity is significantly weakened.

Claims (10)

1. The track shoe is characterized by comprising a track bottom plate and at least one track spike, wherein the track bottom plate is made of a composite organic material, and the track spike is made of metal.

2. The track shoe of claim 1, wherein the composite organic material comprises at least one of a polyamide, an epoxy, a phenolic, and a polyurethane elastomer.

3. The track shoe of claim 1, wherein each of the track spikes is divided into 1-10 track sections, and the ratio of the size of the space between two adjacent track sections to the length of the track sections is 1: (1.5-40).

4. A track shoe according to claim 3, wherein each track is divided into 2-5 track sections, the ratio of the size of the space between two adjacent track sections to the length of the track section being 1: (5-15).

5. The track shoe of claim 1, wherein the track shoe is integrally formed; or alternatively, the first and second heat exchangers may be,

the track bottom plate is detachably connected with the track thorns.

6. A method of making a track shoe as claimed in any one of claims 1 to 5, wherein the method is an integral or a fractional connection method; wherein,,

the integral forming method at least comprises the following steps:

(A1) Processing the track, and placing the track into a track plate die for positioning;

(A2) Preparing organic slurry, wherein the organic slurry is first organic slurry or second organic slurry;

(A3) Adding the organic slurry obtained in the step (A2) into the track shoe mold for polymerization, demolding and heat treatment;

the subsection connection method at least comprises the following steps:

(B1) Preparing the organic slurry;

(B2) Adding the organic slurry obtained in the step (B1) into a track bottom plate die for polymerization, demolding and heat treatment to obtain a track bottom plate;

(B3) Connecting the track bottom plate and the track thorns.

7. The method of claim 6, wherein the first organic slurry comprises a polymer monomer, a catalyst, a first activator, and optionally a toner; the second organic slurry comprises a prepolymer, a cross-linking agent, a second activator, and optionally a toner; or alternatively, the first and second heat exchangers may be,

the first organic slurry contains 0.05 to 1 part by weight of the catalyst, 0.1 to 2 parts by weight of the first activator, and optionally 0 to 1 part by weight of the toner, based on 100 parts by weight of the polymer monomer;

the content of the crosslinking agent in the second organic slurry is 0.01 to 50 parts by weight, the content of the second activator is 0.01 to 2 parts by weight, and the content of the optional toner is 0 to 1 part by weight, relative to 100 parts by weight of the prepolymer.

8. The method of claim 6, wherein step (A1) further comprises preheating the track shoe mold and the track shoe to 80-170 ℃; the polymerization conditions in the step (A3) comprise adding the organic slurry obtained in the step (A2) into a track shoe mold at 80-170 ℃, sealing, wherein the polymerization temperature is 80-170 ℃, and the polymerization time is 10-120 min; in the step (A3), the heat treatment condition comprises that the temperature of the heat treatment is 80-170 ℃, and the time of the heat treatment is 4-12 h.

9. The method according to claim 6, wherein in the step (B2), the polymerization conditions include adding the organic slurry obtained in the step (B1) to the track bed mold at 80-170 ℃, sealing, the polymerization temperature being 80-170 ℃, and the polymerization time being 10-120 min; in the step (B2), the heat treatment condition comprises that the temperature of the heat treatment is 80-170 ℃, and the heat treatment time is 4-12 h.

10. A track-type work vehicle, characterized in that it comprises a track shoe according to any one of claims 1-5 or a track shoe produced by a method according to any one of claims 6-9.

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