WO1997036061A1 - Counterweight for construction equipment and method of manufacturing same - Google Patents

Abstract

The present invention relates to a counterweight for construction equipment and a method of manufacturing the same, said counterweight enabling work in a small place, presenting a beautiful appearance and being inexpensive and easy to recycle. A counterweight (10) is such that at least one surface (N) of an integrally formed outside shape defines an armor and a specific gravity of a material for the counterweight exceeds 7.85 g/cm3. Further, a method of manufacturing a counterweight comprises forming an outside counterweight (30), of which at least one surface of an outside shape defines an armor, by means of at least one of press working, roll forming and sheetmetal welding, covering the outside counterweight (30) with an upper die (33), to which a releasing material is applied, to then inject lead thereinto, and dismounting the upper die (33) after cooling.

Description

 Description Power consumption of construction machinery and its manufacturing method Technical field

 The present invention relates to a counterweight of a construction machine and a method of manufacturing the same, and more particularly, to a structure of a counterweight provided at a rear portion of an upper revolving structure of a construction machine such as a hydraulic shovel and a method of manufacturing the same. Background technology

Hydraulic shovels and other construction machines that have an upper revolving structure have a countertop J-jet mounted at the rear of the upper revolving structure to improve stability during work. When a load is applied to the mounted work equipment, the work can be performed in a stable state without shaking the vehicle body. These counterweights have recently been formed in a box shape with steel plate for cost down, and the inside is often filled with iron chips, iron ore, concrete, or lead. Used _c

 Regarding the structure of the counterweight, see Japanese Utility Model Application No. 62-266465, the Japanese Utility Model Application No. 3-9905, Japanese Patent Application Publication No. 4-1 2 0 3 2】, Japan actual opening 4-1 30〗 52, Japan actual opening 4-1 1 2 7 6 7, Japan actual opening 5 — 3 5 6 7, or Japan actual opening Filed under Circular 6 — 3 52 298.

The Japanese counterpart No. 6 2--2 6 4 6 5 has a counterweight shape with ear-shaped protrusions protruding forward on both left and right sides. In Japan Real Opening No. 3-999065, a balance sheet is provided at the lower rear part of the engine bonnet located at the rear of the upper revolving structure of the vehicle body, and both sides of the bonnet are provided. Protective parts that also function as baluns are placed in the section to protect the engine mounted on the revolving superstructure, etc. Japanese Patent Application Laid-Open No. 4-192428 relates to a power supply unit in which a box is filled with a packing material, and a vent is provided at an upper front position and an upper rear position of the box. Holes are provided to take in some of the cooling air from the engine to promote drying of the internal charge.

 Japanese Patent Application Laid-Open No. 4120203 relates to a counter-unit formed by a front plate, a rear plate, an upper plate, a lower plate, and left and right side plates formed in a hollow structure and filled with a filler. By dividing the rear plate into multiple parts and pressing them into an arc shape, the overall appearance is improved, the number of parts and welding points are reduced, and the size of the press is reduced and the cost is reduced. It is intended. Japan Real Opening No. 4-3 0 15 2 has a main weight that balances with the work equipment attached to the rear end of the fuselage, and an auxiliary weight for adding weight is attached to the main weight. It shows how to attach the main and auxiliary weights.

Japan Real Kaisha No. 4 1 1 2 2 7 6 7 is a part of a bolt that covers the surface of a counterweight material with a sponge or a sheet metal structure with a resin cover and tightens the counterweight material and the resin cover. This is fastened via a plate connected to the power outlet material side. Japanese Utility Model No. 5-3 567 relates to a counterweight made of a steel plate in the shape of a box and filled with filler, and is used to counterweight materials such as iron shavings and iron ore. collectively arranged on the rear plate side of the internal bets, co link lightweight member such as Li one preparative material constituted by Takashi塡the front plate side, a posterior stabilized Mome emissions Bok Japan ₀ is intended to increase the JitsuHiraku 6 - No. 352,988 has a structure in which the outer frame of the counterweight is molded with two-piece plastic, filled with a material having a relatively high specific gravity, and then bonded at the divided surface. I have. As a result, the surface finish and painting man-hours have been reduced, and the exterior surface has been cleaned up.

At present, the following types of counterweights are desired: i) The external dimensions are required to be compact and heavy. In particular, construction machines with an upper revolving superstructure are required to have a large weight because it is necessary to reduce the revolving radius of the revolving superstructure in order to improve workability and operability. ii) Vibration and impact resistant materials are required. In particular, construction machines such as hydraulic shovels are required to have high strength when mounting the counterweight on a revolving structure due to high vibration and impact. In addition, when the size becomes large, it is necessary to attach / detach the counterweight and convey it. Since the number of attachment / detachment is small, a strong mounting portion is demanded.

 iii) It is required that the external appearance is good and the external shape is not easily scratched. In particular, construction machines having an upper revolving superstructure are difficult to be scratched because the revolving superstructure interferes with external obstacles and is scratched. In addition, in order to improve the external appearance, there is a demand for a space between the exterior and the counterweight that does not vary.

 iv) Easy recycling is required.

 V) Inexpensive products are required.

 However, in response to the above-mentioned requests, conventional counterweights provide something for each individual request, but none of them satisfy the request in combination. First, it will be explained that the external dimensions are compact and the weight is large.

 Fig. 27 is a side view of a conventional hydraulic shovel, and Fig. 28 is a plan view. An upper revolving unit 81 is mounted on the lower traveling unit 80, a work machine 82 is mounted on the front of the upper revolving unit 81, and a counterweight 83 is mounted on the rear. Now, assuming that the weight of the counterweight 83 is W2 and the distance from the turning center to the center of gravity of the counterweight 83 is L2, the rear stable moment M2 is

 M 2 = W 2 X L 2

The size of the moment M2 is set so that the work can be performed in a stable state even if a load is applied to the work equipment during the work.

For this reason, conventionally, the value of L2 is increased to obtain a stable state of the vehicle body. However, as shown in FIG. 28, the turning radius R2 is significantly larger than the vehicle body width A2 as shown in FIG. growing Therefore, even if the counterweight occupies a small area, the mounting position is farther from the center of the vehicle and requires a large turning radius, so it is impossible to turn the upper turning body in a narrow place. Work may not be possible. Also, in order to reduce R 2, it is necessary to increase W 2 by a large weight force. <With the current combination of materials, the volume occupied by the counter weight is large. There is a problem that is not desirable in terms of work, such as the appearance and inability to enter narrow spaces.

 For this reason, ultra-small turning type small construction machines have been developed. However, development of ultra-small turning type large construction machines is demanded in order to shorten the work or increase the amount of work. However, as the size increases, the size of the engine, hydraulic equipment, etc., in which the upper revolving structure is built-in increases, making it difficult to keep the turning radius smaller than the vehicle width. For this reason, a counterweight that is as thin as possible and that is heavy and fits within a turning radius smaller than the vehicle width is desired. In construction machinery such as hydraulic shovels, the inertia force may act by about 10 G (gravity) due to the reaction force of excavation force, vibration during turning on / off, or vibration during traveling. You need something strong. In addition, counterweights of large, ultra-small-turn construction machines that are as thin as possible and are heavy and fit within a turning radius smaller than the width of the vehicle have different lateral end faces of the width of the vehicle during manufacturing. Since twisting in the direction is likely to occur, it is desirable that the twisting is small. Similarly, it is easy to cause an opening in which the length of the end face in the left-right direction of the vehicle width becomes large, so that an opening having a small opening is desired.

 Next, those that can be easily recycled will be described.

Japanese Unexamined Patent Publication No. 4—12031, Japanese Utility Model No. 5-35567, and Japanese Utility Model No. 6-352988 have a counterweight formed in a hollow structure. Forces that disclose materials such as iron shavings, iron ore, and concrete that are filled inside are disclosed. This is the force that fills things that are recycled inside < However, when the counterweight is recycled, its internal components become a problem, and it is difficult to recycle it. In particular, the current exterior is formed in a box shape with steel sheets, and the interior is filled with iron chips, iron ore, concrete, etc. In counterweight, it is necessary to take out iron scraps, iron ore, concrete, etc. after the steel sheet is destroyed when recycling, which is not appropriate because it requires man-hours and costs. Also, it is difficult to divide a large counterweight with a large external shape into small pieces. Disclosure of the invention

 The present invention has been made in view of the above-described problems. The turning radius can be reduced, and work can be performed even in a narrow K place, and it is compact, has a good appearance, is inexpensive, and can be easily recycled. It is an object of the present invention to provide a power unit for a construction machine and a method for manufacturing the same.

The first power tool weight of a construction machine according to the present invention is a power tool weight of a construction machine having a power port light at a rear portion of an upper revolving structure. The weight is characterized in that at least one surface of the integrally formed outer shape forms an exterior and the specific gravity of the material exceeds 7.85 g / cm ^;! . Further, at least one surface of the outer shape serving as the exterior may be subjected to a hardening treatment such as a chilling treatment, a coating treatment, a thermal spraying treatment, or a painting.

 According to such a configuration, the weight can be made larger than that of conventional materials and steel plates, and the recycle is easy and inexpensive because it is integrally formed. In addition, increasing the specific gravity of the material also improves the sound insulation effect. Further, the hardening treatment makes the external appearance good and the external shape is hardly scratched.

The power plant weight of the second construction machine according to the present invention has a counterweight power, is formed integrally, and has a specific gravity of 7.85 g / cm ^{; i.} It is characterized in that it has a reinforcing material at the place where it goes over and is attached to the upper rotating body and / or inside. In addition, the counter-way Bok of the material may be in the lead _c

With this configuration, the conventional錶物, _c in particular lead can rather large to compare the weight of the steel sheet, the surface pressure of about 1.5 for causing plastic deformation in kg / cm ² or so, construction machinery or the like of the vibration, In a vehicle having a high impact, the strength of the mounting portion is reduced. Also arrived in a large vehicle In the case of repeated removals, damage to the mounting part is prevented. Further, by inserting a steel material as a reinforcing material into the inside, strength against torsion and deformation is increased. By using lead, it is possible to reduce the cost and to reduce the size of the whole counterweight. Accordingly, the size and auxiliary materials required for production can be reduced in size.

 The power weight of the third construction machine according to the present invention includes a counter power, an outer power weight having at least one outer surface having an outer shape, and an outer power. It is provided on the opposite side of the surface and has an inner counterweight formed integrally with the outer counterweight.

 According to such a configuration, since the outer counterweight and the inner counterweight are separated, the recycling is facilitated and the cost is reduced. For example, the outer counterweight is formed of steel or a polymer material, and the inner counterweight is formed of lead, so that the temperature is reduced from about 470 to 480 during recycling. Raising the temperature to 0 ° C melts lead, making recycling easier. Further, by forming the outer counterweight with a steel material or a polymer material, the external appearance is improved.

Further, the inner counterweight may be inserted, bonded, or assembled with the outer counterweight. It is desirable that the specific gravity of the inner power weight exceed 7.85 gcm ^: '. The material of the inner counterweight is lead, and the lead is incorporated into the outer counterweight steel plate or bonded or bonded to the outer counterweight steel plate or polymeric material. The base may be assembled and formed: This configuration simplifies manufacturing. In addition, by increasing the specific gravity of the material, it is possible to reduce the size of the counterweight as a whole, and accordingly, it is possible to reduce the size and auxiliary materials required for production.

Further, the inner counterau X-it may have a reinforcing material at a location to be attached to the upper rotating body and / or inside. The outer counterweight has at least one outer surface made of a concave-shaped steel plate, and has a concave upper surface plate and a lower surface plate, respectively. At least two vertical reinforcements that connect the inside of each other, multiple horizontal reinforcements that are fixed to at least two of the vertical reinforcements, and vertical reinforcements that are inserted into the recessed space And a lead material for coating the lateral reinforcement. In addition, the outer counterout X-it has at least one outer surface made of a steel plate with a concave shape, and a power unit unit is attached to the upper rotating body at the lower side of the concave shape. At least two longitudinal reinforcements and at least two longitudinal reinforcements that connect between the inner sides of the weight mounting member, the concave upper surface plate, and the weight mounting member. And a lead material inserted into the space of the concave shape and covering the vertical reinforcing material and the reinforcing material.

 With this configuration, an effect similar to that of the above second counterweight can be obtained. In addition, the lead material covers the lateral reinforcing material and the veil reinforcing material, thereby increasing the strength against deformation such as twisting and opening.

 In the outer power weight, one surface of the outer shape serving as the exterior of the counterweight may be a curved surface in the width direction and the vertical direction of the upper revolving structure, and the lead material may be embedded. With this configuration, the lead material is embedded so that the outer counterweight and the lead are tightly adhered to each other, and the counterweight has a curved surface in the vertical direction, which improves rigidity. Deformation such as twisting and opening is reduced. In addition, the use of lead reduces the outer shape of the counterweight, and the use of lead material allows the lead to adhere tightly to the counterweight steel plate, resulting in vibration and rotational inertia. Thin steel plates can be used even for large construction machines with large power. For this reason, press forming or roll forming can be performed, and a curved surface can be provided in the width direction of the upper-part turning body, so that a very small turning type vehicle can be made even in a large construction machine.

Also, an inner face plate fixed to the outer power outlet and serving as an inner counter weight may be provided inside the front of the outer power outlet. With this configuration, lead is held by the inner face plate, so that lead does not spill out inward, and the outer force center weight and the inner face plate become rigid, so rigidity is reduced. And deformation such as twisting and opening decreases. Further, a detachable auxiliary counterweight may be provided inside the counterweight. With this configuration, the weight of the power center weight can be adjusted according to the attachments such as attachments mounted on the construction machine, and the stability at the time of work can be improved. There is no need to manufacture many types of large counterweights, and the cost can be reduced. In addition, even for large models to which various attachments can be attached, the balance of the vehicle can be improved simply by attaching the auxiliary cowl weight to the cowl weight. As a result, the number of changed parts of the vehicle is reduced, and the number of changed parts is eliminated, so that man-hours for managing the parts can be reduced, and the vehicle can be manufactured at low cost. In addition, since the auxiliary counterweight is simply attached, the counterweight can be easily changed in response to the attachment at the site.

 A fourth construction machine counter unit according to the present invention is a construction machine in which a box-shaped member made of a steel plate material is disposed at a rear portion of an upper revolving structure, and a filler is inserted into the box. The box-shaped configuration has a radius of curvature in the width direction and the vertical direction of the upper revolving unit, and the outer plate of the outer counterweight processed by roll forming, and a flat surface. Visually shields the upper side between the inner plate and the outer plate, which is V-shaped with a straight line at the bottom and whose end is fixed to the end of the outer plate, and the outer force center X-it The upper plate, the lower plate that shields the lower side between the outer plate and the inner plate, and the unit for mounting to the upper revolving unit, and the upper plate and the weight mounting member. At least two vertical reinforcements that connect the insides of the And a plurality of transverse reinforcement that is fixed to the two members, the charge 壚材 into a box is characterized in that it consists of a lead material.

With this configuration, by processing the outer surface plate as the exterior by mouth forming, the external appearance is improved and the processing of the curved surface of a large counterweight with a circular arc can be easily produced. And it can be inexpensive. For this reason, ultra-small turning vehicles for large construction machines can be produced. In addition, the inner inner plate is V-shaped with straight sections, so that the engine, hydraulic equipment, etc. can be easily arranged, and the outer plate, which makes the engine, oil-oil equipment, etc., the exterior, Can be cleaned neatly :: Also, vertical reinforcement and green reinforcement In addition, the rigidity is increased because they are connected to each other. Due to this increase in rigidity, the strength against deformation such as twisting and opening increases, and even in counterweights for large construction machines, processing errors such as twisting and opening are reduced, and the steps and joints with the exterior are reduced. And the appearance is improved, and mounting on the vehicle body becomes easier. In addition, since the vehicle is mounted on the vehicle body using weight mounting members, it can be used in large construction machines equipped with a kayun weight using thin steel plates and lead, that is, even in vehicles with high vibration and impact. , from the fact that increasing the strength of the mounting portion, _c and force increased durability, also, Ru can be repeated attachment and detachment of Cow Ntauwei Bok often _(,

 In addition, at least a pair of longitudinal reinforcing members are disposed so as to sandwich the center position in the left-right direction of the counterweight, and have a horizontal reinforcing member fixed to the longitudinal reinforcing members. And a pair of suspension members attached to the veil reinforcement and protruding from the top plate of the counterweight, and are provided between the veil reinforcement and the reinforcement attached to the counterway. A hook attaching member protruding from the top plate of the bird may be provided.

 With this configuration, when attaching / detaching the counterweight, the weight of the counterweight is applied to the vertical reinforcing member and the horizontal reinforcing member from the hook mounting member, so that separation between the top plate and the lead is prevented. Or, the deformation of the top plate is eliminated, so that the counterweight can be attached and detached with ease. In addition, the thickness of the top plate can be reduced, and the cost can be reduced.

The inner plate has a plurality of holes, one of which is filled with molten lead, the other hole is used for venting during lead filling, and the other hole is filled with lead. A small confirmation hole may be used. With this configuration, when filling the counterweight with lead, injection becomes easy and gas can be vented from the opposite side, so that lead can efficiently reach the inside of the counterweight. At the same time, it is easy to check the injection amount.In addition, the inner counterweight is opened in a predetermined range, and in the opened predetermined range, lead is exposed and the exposed amount is reduced. the good _c this configuration be variable on the weight of the counter © We Lee Bok by variable exposure of lead from and the monitor, the opening material of the inner of the inner surface plate of Cow Ntauwe Lee Bok can save The weight of the power outlet can be adjusted only by changing the amount The lower plate and the inner plate can be commonly used, and the processing jig and bending jig can be saved. For this reason, only the upper mold needs to be produced, and counterweights with different weights can be manufactured at low cost. Also, since lead can be integrated, there is no need for a mounting device or the like, and the counterweight can be adjusted with a simple configuration.

 Further, the lead and the predetermined range of the opening may be indicated by the material and the weight. According to this structure, the lead is melted by applying a temperature of about 470 ° C. directly to the counterweight as it is, because it is open, and the lead melts and flows out of the opening. Therefore, there is no need to separate the steel plate from the lead, making it easier to recycle, and the material and weight are described to ensure that the recycling is performed

 Further, one surface of the outer shape serving as the exterior of the counterweight may have an end surface at substantially the same distance from the turning center of the upper turning body. With this configuration, a very small turning type large construction machine can be obtained. In particular, the curvature of one surface of the outer panel is set to be almost the same distance from the center of rotation, so that thin plates can be easily formed, and a large-sized ultra-small-turn type construction machine can be obtained.

 In addition, the inner surface of the counter unit is provided with irregularities so as to cover the mechanical parts mounted on the upper revolving unit, and the thickness in the front-rear direction near the vehicle body center line is made thicker than the both ends. You may. With this configuration, the outer shape of the exterior of the counterweight is reduced in distance from the turning center, so that a super-small turning large construction machine can be obtained and the specific gravity of the material can be obtained. The sound insulation effect is improved by increasing. In the construction machine with a revolving body, the thickness of the front and rear wall near the vehicle center line far from the center of rotation is increased, so that the construction machine that can increase the momentum and is stable in the front-rear direction can be obtained. can get.

The first method for manufacturing a power plant weight of a construction machine according to the present invention includes the steps of press forming, roll forming, and sheet metal welding of an outer counterweight having at least one outer surface as an exterior. At least one of them is used, and after the upper mold coated with the release material is covered on the outer counter weight, lead is injected, and after cooling the upper mold is removed. It is characterized by. Also, after forming the outer cowl weight, the outer force The reinforcement may be welded to the center unit, and after the reinforcement is welded, lead may be injected over the upper mold coated with a release material.

 With this configuration, a heavy and large counterweight can be obtained, and a counterweight that is well bonded to the outer counterweight can be obtained. In particular, for large construction machines of ultra-small turning type with large impact and vibration, strong counterweight can be manufactured at low cost. In addition, by processing the outer surface plate to be the exterior by roll forming or press forming, the external appearance is improved and the processing of the curved surface of a large counterweight having an arc is also possible. It can be easily produced and inexpensive. By welding the reinforcing material, a counterweight with less deformation such as twisting and opening can be manufactured even if lead is injected.

 According to a second method for manufacturing a counter unit of a construction machine according to the present invention, the outer power unit having at least one outer surface as an exterior is press-molded, formed by a mouth or formed. The lower mold is formed by sheet metal welding, and the inner force center weight formed by press forming, roll forming or sheet metal welding is used as the upper mold, and the lower mold and upper mold are used. The method is characterized by injecting lead into the space between the upper mold and the upper mold, the lead and the lower mold to produce a counterweight integrated with the mold. Also, after forming the outer cable weight, a reinforcing material is welded to the outer force wire weight to form a lower mold, and the lower mold and the upper metal mold to which the reinforcing material is welded are connected. May be injected with lead.

 With this configuration, the same effect as in the first manufacturing method can be obtained. In addition, since the upper mold and the lower mold are used as products, a dedicated mold for embedding is not required.In addition, the product can be cooled as it is after injection, and productivity can be improved. Improve: Also, the inner counterweight is released from the upper mold, which is a product formed by press molding, roll molding, or sheet metal welding, after the injected lead is cooled, and the exposed lead is exposed. It may have a removable upper mold that can be removed. With this configuration, counterweight units with different weights can be made cheaper by changing the removable upper mold. C

According to the present invention, the counterweight is made of a material having a large specific gravity. The counterweight is resistant to external loads because it is formed integrally with the material. In addition, by reinforcing the inside or the mounting portion with a reinforcing material, the counterweight is heavy, compact, and resistant to vibration and impact. In addition, the counterweight is formed integrally or is formed into two pieces, and when a predetermined temperature is reached, either the one piece or the two pieces is melted. Cycles can be performed easily. Further, the weight of the counterweight can be made larger than the volume occupied by the material having a large specific gravity. Therefore, the turning half of the upper revolving structure can be reduced, so that work can be performed even in a narrow place, and in particular, the turning half of the large construction machine can be efficiently reduced. However, it is possible to obtain a large-sized ultra-small-turn type construction machine, which was difficult in the past. In addition, a large sound insulating effect can be obtained by increasing the specific gravity of the material. In addition, because the outer side of the counterweight is hardened, the damage to the counterunit is reduced even when it interferes with obstacles, and the durability is improved. In addition, a material with a large specific gravity housed inside The power center or the mechanical parts inside are protected. By providing an auxiliary counterweight, the weight of the counterweight can be adjusted without changing the appearance according to the specifications. BRIEF DESCRIPTION OF THE FIGURES

 FIG. 1 is a side view of a hydraulic shovel equipped with a power outlet according to the present invention. FIG. 2 is a plan sectional view taken along the line AA of FIG.

FIG. 3 is a perspective view [# 1] of a power weight according to the first embodiment of the present invention.

Fig. 4 is a cross-sectional view taken along the center line B-B of Fig. 2 c.

FIG. 5 is a perspective view of a metal mold showing an example of manufacturing the counterweight according to the first embodiment of the present invention.

FIG. 6 is a side sectional view of a mold showing an example of manufacturing a power weight according to the first embodiment of the present invention.

FIG. 5 is a perspective view of a power outlet according to a second embodiment of the present invention.

FIG. 8 is a sectional view taken along the line C-C of FIG. FIG. 9 is a perspective view of a counterweight according to a third embodiment of the present invention.

FIG. J0 is a perspective view of a power outlet according to a fourth embodiment of the present invention.

FIG. 1 is a sectional view taken along the line DD of FIG.

FIGS. 12A and 12B are perspective views of an example of a mold for producing a power unit according to the fourth embodiment of the present invention. FIG. 12A is an upper mold, and FIG. B indicates a lower mold. FIG. 13 is a sectional view of a counterweight according to a fifth embodiment of the present invention.

FIGS. 14A and 14B are perspective views of an example of a mold for manufacturing a power unit according to a fifth embodiment of the present invention. FIG. 14A shows an upper mold, and FIG. 4B indicates a lower mold. FIG. 15 is a front view of a counseling unit according to a sixth embodiment of the present invention.

FIG. 16 is a sectional view taken along line EE of FIG.

FIG. 17 is a sectional view taken along line FF of FIG.

FIG. 18 is a front view of a counterweight according to a seventh embodiment of the present invention.

FIG. 19 is a view on arrow Z in FIG.

FIG. 20 is a GG sectional view of FIG.

FIG. 21 is a perspective view of a counterweight according to an eighth embodiment of the present invention.

FIG. 22 is a front view of a counterweight according to an eighth embodiment of the present invention.

FIG. 13 is a plan view of a power outlet according to an eighth embodiment of the present invention.

FIG. 24 is a view on arrow W in FIG.

FIG. 25 is an H-H cross section of FIG.

FIG. 26 shows a counterweight of the ninth embodiment, which is a cross-section corresponding to the H-H cross-section in FIG.

Figure 27 is a side view of a conventional hydraulic shovel,

2 8 is the best mode for carrying out the _f invention is a plan view of a conventional hydraulic sheet Yoberu

 Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

FIG. 1 is a side view of the hydraulic shovel, and FIG. 2 is a plan view taken along the line AA in FIG. FIG. However, the illustration of the internal configuration of the working machine and the cab is omitted.

 In Fig.], The upper traveling body 2 is mounted on the lower traveling body 1. As shown in Figs. 1 and 2, a driver's cab 3 is provided on the left side in front of the upper revolving superstructure 2, an engine room is formed in the rear, and a cowl N has an outer surface on one surface N of its external shape. An interface 10 is provided. Inside the counterweight 10, mechanical parts such as the engine 4, the Lage 1 and the hydraulic pump 6 are mounted. The counterweight 10 is mounted on the revolving frame 2 a of the upper revolving unit 2 and is attached by the mounting bolt 7. Alternatively, although not shown, the counterweight 10 may be mounted in contact with the revolving frame 2 a of the upper revolving unit 2.

FIG. 3 shows a perspective view of the power weight 10A of the first embodiment. The counterweight 10A is integrally formed, and the specific gravity of the material exceeds 7.85 g / 'cm ^{: i} . For example, the material has a specific gravity of more than 7.85 gcm ^! , lead (about 1.34 g Zcm '' copper (8.93 g Ζ'cm ^{: t} ), nickel (8.8 5 g / cm ^Λ), Mo Li Buden (i 0 2 gcm ^3), data down Gusute emissions ^{(1 9 1, / cm:} ... <), gold (1 9 3 g / cm ' ), silver (1 0.5 g / cm), tantalum (16.6 g / cm ^{; <} ), etc., or alloys containing these metals. And the melting temperature is about 470 ° C to 480 ° C, so that the cost is low and low for a weighing weight of 10%. In addition, the surface N, which is the outer shape of the counterweight i 0 A, is hardened at a predetermined thickness and has a hardened layer. Processing, coating, thermal spraying, or _C I Ri hardening treatment such as coating is applied also to the bottom surface Q of Cow Ntawei Bok 1 0 A, Bol Bokuana 1 2 attached is mounted on the swivel frame 2 a of the upper rotating body 2 It is formed.

In the above description, the counterweight 10A is provided on the inner surface R thereof with an uneven force <, and covers and protects mechanical parts such as the engine 4 and the like. The unevenness of 0 A increases the weight by increasing the volume. Fig. 4 shows the vehicle body shown in Fig. 2. FIG. 3 is a cross-sectional view taken along a core line B—B, and the thickness T in the front-rear direction of the inner casing unit 12 near the vehicle center line B—B is large. As a result, the weight at a position farther from the center of turning can be increased.

 The end face of the outer periphery of the counterweight 10 A is located at a distance of radius R i from the turning center C of the upper turning body 2 as shown in FIG. As shown in Fig. 1, if the weight of the counterweight 10 is W1 and the distance from the turning center C to the position of the center of gravity of the counterweight 10 is L1, the rear stable moment of the counterweight only is assumed. Ml

 M] = W 1 X L 1

Becomes W 1 also has size _c than the weight W 2 of the conventional Cow Ntauwei Bok to using lead L i mosquitoes window pointer c Lee Bok 1 0 A in the longitudinal direction of the wall thickness T of the vehicle body center line thickness Ward was for It becomes larger. Therefore, the backward stable moment M1 is much larger than the backward stable moment M2 of the conventional counterweight only.

 Therefore, when the rearward stable moment MI of the counterweight only is made equal to the conventional rearward stable moment M2 of only the counterweight, the rear end turning radius R of the upper revolving superstructure 2 becomes equal to R2. 1 can be made significantly smaller by increasing the weight of the counterweight 10 as compared with the rear end turning radius R2 of the conventional upper turning body 51 shown in FIG. Therefore, the size of the revolving diameter 2 X R 1 of the upper revolving superstructure 2 shown in FIG. 2 is close to the outer width A 1 of the vehicle body, so that work in a narrow place is possible.

 Next, FIGS. 5 and 6 show a mold showing an example of the manufacturing method. This mold is formed of a lower mold 13, a horizontal mold 13 A and a horizontal mold 14. The lower mold 13 is formed of a plate. The horizontal mold 13A is composed of a side plate 13a having a shape corresponding to the outer shape of the counterweight 10A, and a folded back j3b continuous with the side plate 3a. Become. The mold 14 includes a side plate 14a having a shape corresponding to the inner shape of the counterweight 10A, and a lower turn 14b continuous with the side plate 14a. Horizontal mold i 3 A and 橫 mold 14 are attached to lower mold 13 by bolts 15

After the mold release agent has been applied to the inside of the above mold, The mold 13A and the horizontal mold 14 are assembled using the bolt 15 and the molten lead is injected into the mold from above and molded. At this time, by injecting a predetermined amount of lead corresponding to the volume of the counterweight 10 A, the height of the counterweight 10 A is formed. After the counter unit 10A is cooled to a predetermined temperature after the injection, the mold 13A and the horizontal mold 14 are separated, and the power unit 10A is taken out. As a result, a heavier, compact, inexpensive, integrally molded counterweight i0A having at least one surface forming an outer surface can be obtained. This coupon 1 OA is suitable for small construction machines with low vibration and impact, or for vehicles using rubber tires.

FIG. 7 is a perspective view of the power outlet 10B of the second embodiment, and FIG. 8 is a cross-sectional view of CC in FIG. As in the first embodiment, the counterweight 10B is integrally formed, and the specific gravity of the material is greater than 7.85 g / cm ^{: f} . In the case of the counterweight, a reinforcing material is inserted into the mounting part on the bottom surface S of the counterweight and inside. The mounting portion of the bottom surface S includes a weight mounting member i 6, which is reinforced when mounted on the swivel frame 2 a, and a counterweight 10 B, which is a counter frame. A bolt mounting member 18 into which a mounting bolt 7 (shown in FIG. 1) to be mounted on a is inserted is inserted. Inside the counterweight 0B, internal reinforcing members 19, 19A and 19B made of a steel plate are inserted. A hook member 18A into which a hook (not shown) for lifting the counter unit 10B is inserted is inserted into the upper surface U of the counter window. In addition, an auxiliary wire member 18B for attaching the auxiliary power unit 10B described later is inserted into the inner side I of the side surface. In this embodiment, the weight mounting member 16, the internal reinforcements 19, 19 A, 19 B, the bolt mounting member 18, the hook member 18 A, and the auxiliary fitting Each contact portion of the member I 8 B is welded. The position, number and type of reinforcements can be inserted as needed

The counterweight 10B of the second embodiment is manufactured, for example, by using the molds shown in FIGS. 5 and 6.-At this time, the counterweight of the lower mold 13 is used. Part 10 B part and After applying a mold release agent to the inside of the horizontal mold {3}, assemble the lower mold 13 and the horizontal mold 13Α with the bolt 15. Apply a mold release agent to the inside of the horizontal mold 14. Next, the lower die 13 and the lower die 13A are attached to the die mounting member 16, the bolt mounting member 18, the internal reinforcing member 19, etc. as an assembly. After assembling, mold 14 is assembled to lower mold 13 and assembly mold 13A using bolt 15. At this time, the parts that were inserted into the interior, such as the member 16 for mounting the unit, the member 18 for mounting the bolt, and the internal reinforcing members 19, 19A, etc., were used for cleaning. Better degrease. After the lower mold 13, the horizontal mold 13 A and the assembled mold j 4 are assembled, the molten lead 10 B is formed by injecting molten lead from above. . At this time, a predetermined amount of lead corresponding to the volume is injected into the injected lead, and the injected lead is used as the weight mounting member 16, the bolt mounting member 18 and the internal reinforcing material. Good adhesion to 19, 19A, 19B, etc. Chikarau Ntau Wei Bok 1 0 B after injection is cooled to a predetermined temperature, Ri by _e to be taken out by separating the lower mold 1 3 and Yokokin type 1 3 A and Yokokin type 1 4, stiffener As a result, a heavier, compact, and inexpensive integrally molded coupon weight 10B can be obtained. This counterweight 10B is suitable for large construction machines with low vibration and impact.

 FIG. 9 shows a perspective view of the counterweight 10C of the third embodiment. The counter weight 10 C is attached to the outer counter weight 21, inner counter weight 22, and outer counter weight 21 to attach the inner counter weight 22. It is composed of bolts 23 that are the means. That is, the inner counterweight 22 is fastened to the outer counterweight 21 by the bolt 23 and is detachable. The outer counterweight 21 is made of a hard polymer resin or a steel plate. This outer force connector 2] is produced by press molding or sheet metal welding. The inner counterweight 22 is made of a material having a large specific gravity, and is formed of lead in this embodiment .: The inner counterweight 22 is a counterauw in the first embodiment.制作 Produce in the same way as in item 10A.

In the above embodiment, the inner counter weight 22 and the outer counter weight 2 1 is fastened by a bolt 23, but the inner counterweight 22 and the outer counterweight 21 may be bonded using an adhesive. For example, the hard resin or steel plate of the outer counterweight 2I is used for the inner resin sheet 12 of a material having a higher specific gravity, and the commercially available resin adhesive (for example, epoxy resin, vinyl chloride) is used. It may be bonded using a resin-based material. In this project, as shown in Fig. 1 and Fig. 2, windows 24, 25 for inspection of engine 4 etc. are provided on the left and right sides of the mountain weight i0C. .

 As shown in FIG. 9, a counterweight unit 10 is fastened by bolting an auxiliary counterunit 26 inside the inner counterweight 22 with a bolt 27. The weight of C can be further increased. By doing so, it becomes possible to adjust the weight of the counterweight without changing the appearance even when the specifications are different. When attaching the auxiliary counterweight 26, the inner counterweight 22 may be simultaneously fastened to the outer power weight 21 by the bolt 27.

 As a result, the counterweight 10C facilitates inspection of the engine and the like, and also facilitates separation between the inner power weight 22 and the outer power weight 21. Recycling is easy. In addition, the outer counter gate 21 which is a part of the exterior can be formed into a smooth and uniform radius by molding a sheet metal configuration and a hard resin, so that a beautiful exterior can be obtained. Furthermore, a large counterweight 10C can be used in common for many types of attachments, so that management becomes easier and production costs are reduced.

FIG. 10 is a perspective view of the power outlet 10D of the fourth embodiment, and FIG. 11 is a cross-sectional view taken along line DD of FIG. The counterweight 10D is formed by directly inserting the inner power weight 31 into the outer weight 30. The outer force center 30 has a thin steel plate formed by press forming or sheet metal welding. In the present embodiment, the outer counterunit 30 is reinforced by a thin steel plate 30a serving as the-part of the exterior and, similarly to the second embodiment, mounted on the revolving frame 2a. The weight mounting member 16 and the counterweight 10 D The bolt mounting member 18 into which the mounting bolt 7 (shown in Fig. 1) to be mounted on a is inserted is inserted. Further, inside the counterweight 10B, internal reinforcing members 19, 19A, and 19B made of a steel plate are inserted. A hook member 18A into which a hook (not shown) for lifting the counterweight 10B is inserted is provided on the upper surface U of the counterweight. Further, a member 18B for an auxiliary sheet for attaching an auxiliary light 10B to be described later is inserted into the inner surface K of the side surface. In this embodiment, the sheet mounting member 16, the internal reinforcing members i 9, 19 A and 19 B, the bolt mounting member 18, the hook member 18 A, and the auxiliary arm Each abutment portion of the ingot member 18B is welded.

 The thin steel plate 30a and the weight mounting member 16 are welded, and are configured so as not to leak even when molten metal such as lead is injected. Therefore, it can be used as a lower mold at the time of assembling. Inside the steel plate outer weight 30, an inner counterweight 31 made of a material having a high specific gravity is inserted. In the present embodiment, similarly to the power supply weight 1OA of the first embodiment, the lead is melted and poured and molded.

 Next, FIG. 12 and FIG. 12B show a mold showing an example of a method of manufacturing the power consumption 0 D of the fourth embodiment. This mold is formed from a pair of an upper mold 33 and a lower mold 34. The upper mold 33 has an integral structure, and its lower side is formed in a shape conforming to the inner shape of the counterweight 10D. On the upper side, a gate 33a is provided. The upper mold 33 is inserted into the lower mold 34. The lower mold 34 in which one is formed is used as a product as shown in FIG. It is composed of an outer counter weight 30 of the input 10 D. The outer die 30, which becomes the lower mold and 34, is degreased on the inner side by washing, and then a mold release agent is applied to the inside of the upper mold, and the upper mold is attached to the lower mold 34. The upper mold 33 and the lower mold 34 are screwed and fixed by a bolt or the like (not shown) as necessary after the insertion.

In the assembled mold, a predetermined amount of lead melted from the gate 3 3a of the upper mold 33 Inject. Counter web wells 1 0 D, after being cooled after the injection of lead up to a predetermined temperature, the upper die 3 3 is separated Cow Ntauwei Bok 1 0 D more to _c to be taken out, the outer mosquitoes c te Uwei Bok 3 0 and the Ri is reinforced by the reinforcing member and Moni, heavy weight, co Npaku Bok, and that Chikarau pointer Uwei Bok 1 0 D inexpensive molded to obtain _c the Cow Ntau Wei G10D is particularly suitable for large construction machinery with large vibration and impact.

 Fig. 13 shows a cross-sectional view of the power outlet 10E of the ") embodiment. The power outlet i0E of the fifth embodiment shows the power outlet of the fourth embodiment. A thin steel plate 41 of the inner plate, which becomes the inner power weight, is attached to the power window 10 I]. It is used as a mold and becomes a product as it is.

 FIGS. 14A and 14B show a mold showing an example of a method for manufacturing the power weight 10E of the fifth embodiment. This mold includes a pair of an upper mold 41 and a lower mold 42. The upper mold 41 is formed of a single plate, and the shape thereof is formed in conformity with the shape inside the power center weight 10E. This plate is produced by press molding or the like. The lower mold 42 is composed of the outer counterweight 30 of the counterweight 10E, which is a product, similarly to FIG. 11 of the fourth embodiment. You.

The upper mold 41 and the lower mold 42, which are products, are degreased on the inside by washing, and then assembled by inserting the upper mold 41 into the lower mold 42. This and come, because it is composed by the lower die 4 2 thin steel plates 3 0 a, because the weight of the lead to be inserted into heavy, in order to prevent the _c this thin steel plates 3 0 a is deformed, The thin steel plate 30a is housed in a box 43 that supports the lower mold 42, and is appropriately supported by a support plate 44. Further, the upper mold 41 and the lower mold 42 are fixed by being screwed by a bolt (not shown) or the like as necessary after being inserted.

Inject the prescribed amount of lead melted from the gate 41a of the upper mold 41 into the assembled mold. <Counter unit 10E cools down to the prescribed temperature after lead injection Was done Later, it becomes the product's counterweight 10E. As a result, the counterweight 10E is reinforced by the inner and outer counterweights 30 and the reinforcing material, and is also a heavy, compact, and inexpensive unit. A molding force 10E is obtained. At the time of recycling, if the counterweight 10E is heated to a temperature higher than the melting temperature of lead, the lead melts and the thin steel plate 41 and the thin steel plate 30a separate, and the lead begins to melt from inside. Coming. Therefore, the lead inside can be taken out more easily than that inserted into the conventional box-shaped sheet metal structure. This counterweight 10E is particularly suitable for a large-sized construction machine having large vibration and impact, as in the fourth embodiment. With reference to FIG. 15 to FIG. 17, the power weight 1 OF of the sixth embodiment will be described. The power weight 10 F includes an outer counterweight 45, a block 46 made of a material having a high specific gravity inserted therein, and the block 46 connected to the outer counterweight. And a fixing member 47 fixed to the unit 45.

 The outer counterweight 45 is formed by press forming or sheet metal welding, and has an outer plate 45a that is a part of the exterior, and a vertical and horizontal direction formed in a grid and fixed to the outer plate 45a. A mounting plate 45 mounted on a joined frame plate 45b and a revolving frame 2a that is arranged laterally and fixed to the external plate 45a and the frame plate 45b. c. The outer plate 45a, the frame plate 45b, and the mounting plate 45c are provided with holes 48 penetrating vertically at predetermined positions.

The block 46 is formed in a predetermined size (HaXBaXLa) to be accommodated inside the frame plate 45b. At a predetermined position of the block 46, a hole 46a penetrating vertically is formed. The fixing member 4-7, hollow pipes ■! And 7 a, and Bol Bok 4 7 b, and Wa finisher 4 7 c, in _c above is composed of a nut 4 7 d, the outer count down Tauwe Lee Blocks 46 are inserted into the inside of each of the skeleton plates 45b of the unit 45. Hollow pipes are inserted into the holes 48 penetrated in the vertical direction of the external plate 45a, the frame plate 45b, and the mounting plate 45c, and the hole 46a of the block 46. 4 7a and Bolt 4 7 b is inserted and blocks 46 are fixed. When the inserted pipe 46 is made of lead, the hollow pipe 47 a has a force <to reduce the impact surface pressure, and the bolt 47 b has a predetermined thickness. It does not need to be provided.

 According to the above configuration, if the hollow pipe 47a and the bolt 47b are removed, the lead inside can be more easily taken out than that inserted into the conventional box-shaped sheet metal structure. In the above embodiment, the block 46 is fixed by penetrating the outer plate 45a, the frame plate 45b, the mounting plate 45c, and the block 46 in the vertical direction. A locking bolt 49 may be provided in contact with the front end of the block 46.

 The counterweight 10 G of the seventh embodiment will be described with reference to FIGS. 18, 19 and 20. The counterweight 10G is shown mounted on the turning frame 2a from the first embodiment to the sixth embodiment. However, in the seventh embodiment, the turning frame 2a is used. Shows an example of attachment in the front-rear direction. The counterweight i0G has an integral material with a high specific gravity, a mounting part on the side surface V, and a reinforcing material inserted inside. The mounting portion of the side surface V is provided with four square steel members 5 i, and the steel members 51 are provided with holes 51 a into which mounting bolts are inserted. The square mounting steel member 51 is provided with a vertically reinforcing steel plate 52 force in the vertical direction of the drawing and a lateral reinforcing steel plate 53 force in the horizontal direction.

 The reinforcing material of the vertically reinforced steel plate 52 is installed with a large width in the lateral direction in the front view, and mainly reinforces against the longitudinal force of the vehicle. In addition, the laterally reinforced steel plate 53 is installed with a large width in the vertical direction of the paper in the plan view (Fig. 19), and mainly reinforced against the vertical force of the vehicle. I have. The periphery of the mounting steel material 51, the vertical reinforcing steel plate 52 and the lateral reinforcing steel plate 53 is surrounded by an integral lead weight 54. This production is performed by embedding as in the second embodiment. This configuration results in a heavier, compact, and inexpensive-integral power weight 10 G with a simpler configuration:

The counterweight of the eighth embodiment will be described with reference to FIGS. 21 to 25. c. The power unit 10H has the outer dimensions of the upper revolving unit 2 in the width direction / bare pressure. Left of the bell Rightward) Approximately 265 Omm in Lp, up-down direction (height direction of hydraulic shovel) II Approximately 125 mm in thickness, Bp thickness direction (front-rear direction of hydraulic shovel) Approx. 7 For medium-sized models with a size of 0 O mm.

 Counterweight] The main configuration of 0H is composed of an outer counterweight 61, an inner counterweight 67, and a reinforcing member 71. An outer counterweight (i1 is composed of an outer plate 62, an upper plate 63, a lower plate 64, and a weight mounting member 65. The inner counterweight G7 The member corresponding to is composed of an inner surface plate 68 and a filled lead 69. The reinforcing member 71 is composed of a vertical reinforcing member 72 and a horizontal reinforcing member Ί4. A hook member 78 for suspending and lowering the counterweight is attached to the port 10H.

 The outer surface plate 62 is processed by roll forming, has a predetermined width 62 a at the top and bottom, and has a radius of curvature R r in the width direction of the upper rotating body 2 and a radius of curvature R in the vertical direction. have h.

 The inner surface plate 68 is formed by press working or sheet metal welding, and has a V-shape having a linear portion Qk on the bottom side in plan view. In the inner plate 68, a rectangular opening Qp (hatched portion) is provided in the linear portion Qk. Further, the opening Qp of the inner face plate 68 is bent and abuts on the vertical reinforcing member 72, and is welded to the vertical reinforcing member 72. The inner plate 68 has a plurality of holes 68a, 68b, and 68c, and one of the holes 68a is filled with molten lead 69 and the other hole 68b. Gas is vented during lead filling, and a hole for confirming lead filling is provided. Also, a lead filling amount confirmation hole 68c may be separately provided. Further, a concave portion KA is provided on the inner face plate 68 so as to cover a mechanical portion mounted on the upper swing body 2.

The upper plate 63 is cut into a flat plate, and one end is welded to a predetermined width 62 a above the outer plate 62, and the other end is welded to the upper end surface of the inner plate 68. The lower plate 64 is cut into a flat plate, one end of which is welded to a predetermined width 62 a below the outer plate 62, and the other end of which is welded to the lower end surface of the inner plate 68. The lower plate 64 is welded so as to extend to the left and right in the width direction of the counterweight 10H. ヱ ヱ The mounting member 65 has the same shape as the vertical plate 65a that has been pressed or formed into a U-shape with a circular arc, and has one end face with the circular arc of the vertical plate 65a. A flat plate 65b having a circular arc shape and a square member 65d fixed to the flat plate 65b and having a bolt hole 65c. The wall mounting member 65 is disposed on the lower surface of the counter wall 10H and in the center, and is positioned below the vertical plate 65a and in a U-shape. The outer side of the circular arc of the shape is fixed to a predetermined width 62 a below the outer surface plate 62. The lower surface of the flat plate 65b is in contact with the swivel frame 2a, and the counterweight 10H is attached to the swivel frame 2a by a bolt screwed into the bolt hole 65c. Is done.

 In this embodiment, a weight mounting member 65 is provided at the center, and the lower plate 64 is separately welded to the left and right in the width direction of the counterweight 10H.取 When attaching to the revolving frame 2a at 64, it may be made integrally with the upper plate 63 as well.

 The vertical reinforcing member 7 2 of the reinforcing member 7 1 is made of a shaped steel material, and the inside of each of the upper plate 6 3 of the outer counterweight 61 and the flat plate 65 b of the weight mounting member 65 is inside. It connects them to each other to reinforce the countdown. The vertical reinforcing members 72 are provided with a pair of vertical reinforcing members 72 a and 72 b spaced apart from each other at least with respect to the center position in the left-right direction of the mountain weight.

 The reinforcing material 7 4 of the reinforcing material 7 1 is made of a flat steel material 7 4 a, and reinforced the counterweight 10 H through a pair of longitudinal reinforcing materials 2 a and 72 b. . In this embodiment, an L-shaped steel member 74b is also used. The flat steel members 74a are fixed to the vertical reinforcing members 72a and 72b at predetermined intervals in the vertical direction. The L-shaped steel member 74b is a longitudinal reinforcing member 72a, 72b on the opposite side of the flat steel member 74a, and is disposed on the upper side. In addition, one end of the L-shaped steel member 74 b is fixed to the inside of the inner plate 68, and the L-shaped steel member 74 1] is used as a partition for the opening Q p of the inner plate 68. C. In this embodiment, a reinforcing plate 71a extending between the vertical reinforcing members 72a and 72b and the flat plate G5b of the weight mounting member 65 is provided. Installed,

The reinforcing material 7] is twisted in the counterweight 10H or counterweight. G The opening of 10H is prevented. The twisting of the counterweight 10H means that the left and right end faces Me, Ne of the counterweight 10H are not parallel planes but inclined to intersect. The opening of the counterweight 10H means that the length of the left and right end faces Me and Ne of the counterweight 10% is increased. In addition to preventing twisting or opening, the reinforcing material 71 adheres to the filled lead 69 to prevent cracking, deformation, or opening Qp due to vibration or inertia during turning. Is prevented from jumping out.

 The hook ffl member 78 is composed of a hook plate 78 a made of a pair of flat plates and a hook square 78 made of a square. The pair of hook plate members 78a are arranged at least so as to sandwich the center position of the counterweight in the left-right direction, and are each provided with a vertical reinforcement member 72a, 72a. It is fixed to b and protrudes from the upper plate 63. The hook plate material 78a has a hole 79a for suspension.

 The hook bar 78 b is located between the pair of hook plates 78 a and above the hook plate 78 a behind the counterweight 10 H. It protrudes from the face plate 63, and the opposite end face is fixed to the flat steel member 74a of the reinforcing member 74 and disposed. This arrangement is provided at substantially the center position in the left-right direction and at the center of gravity of the right and left coun- stal weight 10H. Further, a bolt hole 79b for attaching a hanging hook (not shown) is formed in the hook bar 78b. Since the pair of hook plate members 78a and the hook square members 78b are arranged in a triangular shape in plan view, they can be stably lifted and lowered.

The above-mentioned force center weight 10 H is the thickness B a in the front-rear direction at the center line of the vehicle body, that is, the center position in the left-right direction of the counter weight, the _c which are thicker than the thickness B b, widens forward Cow Ntauwei Bok 1 0 H, ene di emissions 4, the arrangement of the hydraulic pump 6 is facilitated.

Next, the manufacturing method will be described. The outer plate 62 is formed by passing a roll having a predetermined curvature half g R h in the vertical direction and a predetermined width 62 a above and below both ends. A radius of curvature R r in the left-right direction (the width direction of the upper-part turning body 2) is added while being formed. Next, the roll-formed outer plate 62 is processed to have a predetermined length at both ends in the left-right direction.

 Separately, a U-shaped vertical plate 65a having an arc is formed by pressing or rolling. Also, a flat plate 65b having an arc is cut. In addition, bolt holes 65c are drilled in the square lumber 65d. The vertical plate 65a, the flat plate 65b, and the square lumber 65d are welded using a jig to form a jet mounting member 65 ''.

 Similarly, a pair of longitudinal reinforcing members 72a, 72b, a flat steel member 74a, and an L-shaped steel member 74b are machined into appropriate lengths, welded using a jig, and captured. 7 of strong wood is composed. The reinforcing member 71 includes a pair of hook plate members 78 a on the pair of longitudinal reinforcing members 72 a and 72 b, and a hook square member 78. b is welded to the L-shaped steel 74 b using a jig. Next, the weight mounting member 65, the reinforcing material 71 on which the hook plate material 78a is fixed, and the cut upper surface plate 63 are used with a jig. And weld. Further, the outer plate 62 and the lower plate 64 are welded to the weight mounting member 65, the reinforcing member 71, and the upper plate 63 by using a jig, and the outer counter plate ヱ. Make up item 6 1.

 The inner face plate 68 processed by press working or sheet metal welding is welded to the outer counterweight 61 using a jig. This forms a box shape of the counterweight 10H. It goes without saying that the above welding procedure may be changed as appropriate. The box-shaped lower part is accommodated in a supporting box 44 supporting the outer panel 62 as shown in FIG. 14B with the inner panel 68 facing upward. Next, a removable upper mold (corresponding to the upper mold 101 in FIG. 26 described later) in which a release material is applied is placed on the opening Qp provided in the inner surface plate 68.

In this box shape, molten lead 69 melted at a temperature between 400 and 500 is filled from one hole (; 8a) of the inner face plate 68. , While checking the filling amount of lead 69 while degassing during lead filling from the other hole 68b. The amount of lead 69 is confirmed from the confirmation hole 68c formed with a small diameter provided separately. The lead 69 is filled up to the Ja position shown in FIG. 23 (from the inside to the top of the inner face plate 68 shown). When the molten lead 69 cools, the upper mold is removed and taken out of the supporting box 44 to complete the manufacture of the counter unit 10H.

 In addition, at the time of recycling, when the coke IW is heated above the melting temperature of lead, the lead melts, and the reinforcing material 71, the outer plate 62, the upper plate 63, the lower plate 64, and It is separated from the nozzle mounting member 65 and flows out to the outside from the opening Q 1] provided in the inner plate 68. Therefore, the lead inside can be taken out more easily than that inserted into the conventional box-shaped sheet metal structure.

 FIG. 26 shows the counterweight 10J of the ninth embodiment. In the counterweight 10J, the horizontal reinforcing member 74A is made of the same shape steel as the vertical reinforcing members 72a and 72b, and has high rigidity. This further strengthens against twisting or opening. In the counterweight 10J, the depth of the upper mold 101 covering the opening Qp provided in the inner plate 68 is shown. As a result, the filling amount of lead 69 is such that the surface GA and the surface GB come forward (left side in the drawing) and fill up to the Jb position shown in FIG. However, the amount of lead 69 protruding from the opening Qp increases, and the weight of the counterweight 10J increases. As described above, by changing the amount of the lead 69 exposed in the opened predetermined range, the weight of the counterweight can be easily changed.

In the above-mentioned power outlets 10 H and J, the outer surface plate 62 on which the roll forming is performed has a thickness as large as possible by the roll forming. In the embodiment, the outer plate 62 has a thickness of 4.5 ηιηι. I have. Further, the inner plate 68 has a thickness capable of being subjected to press working and a thickness that reduces the deformation of the outer plate 62, and in the embodiment, a plate thickness of 3.2 mm or 4.5 mm is used. I have. The vertical reinforcing members 72a and 72b and the horizontal reinforcing member 74A are made of grooved steel (100 x 50mm). This is because the counterweights 10H and J of this shape have a large external shape and a small thickness, so that the twisting or opening easily occurs. Also, press forming or roll forming Also, it seems that plastic deformation during molding returns due to filling with hot lead. Therefore, by using a material having the above shape, it is possible to reduce the twist or the opening. In addition, by processing the outer panel as an exterior with a thickness as small as possible by roll forming, the external appearance is improved, and the curved surface of a large counterweight with a circular arc is improved. Can be easily manufactured and at low cost. By employing the counterweights 10A to 10J having such a shape, a very small turning vehicle of a large construction machine can be obtained. In addition, the inner inner plate has a V-shape with straight sections, which makes it easier to arrange the engine and hydraulic equipment, etc. Can be covered. In the past, the counterweight 10 was constructed by using the side plate and welding the side plate and the outer plate, but in particular, the power counterweight 10H and 10J were used. The outer panel has a curved surface in the up-down direction, and the left-right direction is constituted by a single arc. This eliminates the need for welding to the side plate with a complicated curved surface, facilitating cutting and welding of steel materials.Also, by providing a predetermined clearance on the mating surface with the exterior, a beautiful appearance can be obtained. Can be In addition, a high strength section steel is used as a vertical reinforcing member, and since it is connected to a horizontal reinforcing member, rigidity increases, and strength against deformation such as twisting and opening increases. Processing errors, such as twisting and opening, are also reduced in the counterweight of large construction machinery, and the steps and gaps at the joints with the exterior are reduced, and the external appearance is improved, and mounting on the vehicle body is also improved. Becomes easier. In addition, since mounting to the vehicle body is performed using a wall mounting member, even if the vehicle has high vibration or impact, such as a large construction machine equipped with a power center unit using thin steel plates and lead, the mounting section is not required. Since the strength of the tire is increased, the durability is improved, and the attachment / detachment of the counterweight can be repeatedly repeated. The present invention has the above-described configuration, and thus has the following effects.

(1) The outer dimensions are compact and a heavy weight weight can be obtained. Especially in the case of construction machinery with an upper revolving structure, the counterweight is compact. The turning radius of the revolving structure can be reduced, improving workability and operability. Can be

 (2) Because of the use of reinforcing material, a material that is resistant to vibration and impact can be obtained. Since vibration resistance and impact resistance are increased, lead, which is a material having a high specific gravity, can be used in construction machines such as hydraulic shovels. Also, the number of times of attachment and detachment can be increased in construction machines such as large hydraulic shovels.

 (3) The ability to treat the surface to be the exterior, the appearance is good for covering, and the exterior is resistant to scratches. In particular, lead, which has a large specific gravity and is a soft material, can be used in construction machines such as hydraulic shovels.

 (4) Easy recycling can be achieved. By heating the counterweight at a predetermined temperature, it can be easily recycled because it is melted.

 (5) In particular, the use of lead can provide an inexpensive counterweight. Industrial applicability

 INDUSTRIAL APPLICABILITY The present invention is useful as a power plant for a construction machine that can be operated in a narrow place, is beautiful, is inexpensive, and is easy to recycle, and a method for manufacturing the same.

Claims

The scope of the claims

1. A power weight of a construction machine provided with a power weight at the rear of the upper revolving structure, wherein at least one surface of the counterweight has an external shape that is integrally formed. In particular, a counterpart for construction machinery, characterized in that the specific gravity of the material exceeds 7.85 g / cm.

2. The construction machine according to claim 1, wherein at least one surface of the outer shape of the exterior is hardened by chilling, coating, thermal spraying, painting, or the like. Power entry.

3. In the power tower of a construction machine having a power tower at the rear of the upper revolving unit, the counter weight is integrally formed and the specific gravity of the material is 7.85 g. / cm ^{: The} construction equipment power center characterized by having reinforcements over and / or at the point of attachment to the revolving superstructure and / or inside

4. The power weight of a construction machine according to any one of claims 1, 2 and 3, wherein the material of the counter weight is lead.

5. In the counterweight of construction equipment that has a counterweight at the rear of the upper revolving unit, the counterweight is composed of an outer counterweight, at least one of which is an exterior, and an exterior. A counterweight for a construction machine, comprising: an inner force weight which is provided on an opposite side of the surface and which is formed integrally with an outer force weight. :

6. In the counterweight of the construction machine according to claim 5, the inner counterweight force with respect to the outer counterweight; embedding, bonding, or assembling the tie. Is Counterweight for construction machinery.

7. In the counter-weight of construction equipment according to any one of claims 5 and 6, the inner counter-weight has a specific gravity of the material ^{exceeding 7.85} g / cm ^; Power of construction machinery characterized by the fact that:

8. In the construction machine counter unit according to any one of claims δ, 6 and 7, the material of the inner counterweight is lead, and the lead is the outer counterweight. A power tool for a construction machine, which is formed by being incorporated into a steel sheet of an interior or by being bonded or bonded and assembled to a steel sheet or a polymer material of an outer counterau unit.

9. In the counterweight of a construction machine according to any one of claims 5, 6, 7, and 8, the inner counterweight is provided at a place where the counterweight is attached to the upper rotating body, and A power outlet for a construction machine characterized by having a reinforcing material inside.

10. The counterweight of construction equipment according to claim 5, wherein the outer power weight is a steel plate having at least one outer surface with a concave shape, and a concave upper surface plate. At least two or more vertical reinforcing members that connect between the inner sides of the upper and lower plates, a plurality of horizontal reinforcing members that are fixed to at least two of the vertical reinforcing members, and a recess-shaped space. A lead time for a construction machine, comprising: a lead material that rarely covers a vertical reinforcing material and a horizontal reinforcing material.

11. The power outlet for construction equipment according to claim 5, wherein the outer power outlet is a steel plate having at least one outer surface with a concave shape, and a lower portion having a concave shape. At the side, the inside of the wall mounting member for attaching the countdown board to the upper revolving structure, and the inside of each of the W-shaped top plate and the weight mounting member are 5 At least At least two vertical reinforcements, at least two of the vertical reinforcements, and a plurality of horizontal reinforcements that are fixed to at least two of them, and are inserted into the recessed space to cover the vertical and horizontal reinforcements A counterweight for construction machinery characterized by comprising a lead material.

12. The construction machine according to any one of claims 10 and 11, wherein the outer counterweight has an outer shape that is an exterior of the counterweight. A top surface of the upper revolving structure is formed of a curved surface in a width direction and a vertical direction, and a lead material is embedded therein.

13. An inner face plate which is fixed to the outer power outlet and serves as an inner counter outlet at the front inner side of the outer counter water outlet. 0. A power consumption of a construction machine according to any one of items 1 to 11.

14. The construction machine according to any one of claims 1 to 1, characterized in that a detachable auxiliary force center weight is provided inside the counterweight. Countdown.

15 5. In a box-shaped counterpart of a construction machine with a box shape made of a steel plate placed at the rear of the upper revolving structure and a filler inserted in the box shape, the box-shaped configuration is It has a radius of curvature in the width direction and the vertical direction of the body, and has an outer face plate of an outer counterweight processed by roll forming, and a V-shape having a straight portion on the bottom side in plan view, and an end. The inner panel is fixed to the end of the outer panel, the upper panel shields the upper side between the outer counterweight and the inner panel, and the lower side between the outer panel and the inner panel At least 2 K between the inside of the upper plate and the inside of the weight mounting member for attaching to the lower plate and upper revolving structure that shield A vertical reinforcing member and a plurality of horizontal reinforcing members that are fixed to at least two of the vertical reinforcing members. Of charge and 塡材 is, Chikarau te c d b of the construction machine which is characterized in that it consists of lead material Bok

16. At least a pair of vertical reinforcements are arranged so as to sandwich the center position of the counterweight in the left-right direction and have a horizontal reinforcement fixed to the vertical reinforcements. And a pair of suspension members attached to the vertical reinforcement village and protruding from the upper plate of the counterweight, and disposed between the vertical reinforcements and attached to the horizontal reinforcements. Claim 1 characterized by comprising a hook attaching member protruding from the upper plate of the center unit.

0, 1 1, and | 5.

17. The inner plate has a plurality of holes, one of which is filled with molten lead, the other is used to release gas during the filling of lead, and the other is made of lead. The counterweight of a construction machine according to any one of claims 13 and 15, characterized in that the hole is a confirmation hole for a filling amount.

18. The inner counterweight is opened in a predetermined range, lead is exposed in the opened predetermined range, and the weight of the counterweight is variable by making the amount of exposure variable. The counterweight of a construction machine according to any one of claims 15, 1 G, and 17, wherein:

19. The counterweight of a construction machine according to claim 18, wherein a material and a weight are indicated on a predetermined range of the opened lead.

20. The surface of the outer shape of the counterweight having an end surface at substantially the same distance from the center of rotation of the upper revolving structure, wherein the outer surface has an end surface. Counterweight of construction machinery according to any one of 9 ₌

2 1. The unevenness is provided on the inner surface of the counter tower so as to cover the mechanical parts mounted on the upper revolving structure, and the thickness in the front-rear direction near the vehicle center line is made thicker than both ends. Claims 1 to 20 characterized by the following: Power consumption of construction machinery.

2 2. In the manufacturing method of power equipment for construction machinery, press forming, roll forming, and sheet metal welding are performed on the outer counter wire, which has at least one outer surface, as an exterior. At least one of them is used, and after the upper mold coated with the release material is placed on the outer counterweight, lead is injected, and after cooling, the upper mold is removed. Manufacturing method of power tool for construction machinery _c

2 3. After forming the outer counterweight, weld the reinforcing material to the outer counterwire, cover the upper mold with the release material applied after welding the reinforcing material, and inject lead. A method for producing a power center weight for a construction machine according to claim 2, wherein the method is a special emblem.

24 4. In the method for manufacturing power towers for construction machinery, the outer counterweight, which has at least one outer surface and at least one side is an exterior, is formed by press forming, corner forming, or sheet metal welding. In addition to the mold, the inner power outlet formed by press forming, roll forming or sheet metal welding is used as the upper mold, and lead is injected between the lower mold and the upper mold. And a method for manufacturing a counterweight for construction machinery, comprising manufacturing an integrated counterunit using an upper mold, lead, and a lower mold.

25. After forming the outer power outlet, the reinforcing material is welded to the outer power outlet to form the lower mold, and the lower and upper molds with the reinforcing material welded. 25. The method according to claim 24, wherein lead is injected between the lead and the lead.

26. The inner counter-hole is separated from the upper die, which is a product formed by press forming, roll forming or sheet metal welding, after the injected lead is cooled, and the lead in the separated part is exposed. 24. The method for manufacturing a counterweight of a construction machine according to any one of claims 24 and 25, further comprising: