Loader methanol fuel tank and fixing structure thereof

Abstract

The utility model discloses a loading machine methanol fuel tank and a fixing structure thereof, and the methanol fuel tank comprises a first tank body and a second tank body; the first box body and the second box body are both made of stainless steel; and the second box body is transversely arranged at the top of the first box body and is communicated and connected with the first box body. The box body made of stainless steel can resist corrosion of methanol and is not prone to rusting, and the two box bodies are arranged, so that the overall capacity of the methanol fuel tank can be improved, and the requirement for long-time work of a loader is met; the fixing structure of the methanol fuel tank of the loading machine comprises the methanol fuel tank, a fixing support and a rubber part. The rubber part is arranged between the first box body and the fixing support, the first box body and the fixing support are separated, electrochemical corrosion of the first box body and the fixing support which are made of stainless steel can be avoided, and the service life of a product is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of loaders, in particular to a methanol fuel tank of a loader and a fixing structure thereof. Background Art

[0002] The loader fuel tank is an important part of the engine fuel system, and its main function is to provide power fuel for the engine. The engines currently installed in loaders on the market are all diesel engines, so the fuel tanks used are mostly made of carbon steel Q235B, and the required volume of the fuel tank is generally around 300L, which can meet the endurance requirements of the entire machine for 8 to 10 hours.

[0003] However, diesel as a fuel has a serious problem of emission pollution, while methanol is a clean fuel for internal combustion engines. It has a wide range of raw materials, surplus production capacity, mature production technology, clean combustion, and is convenient to fill and transport. Therefore, existing heavy-duty vehicles are studying and promoting the use of methanol to replace diesel, and this application newly proposes a loader methanol fuel tank that uses methanol as fuel.

[0004] However, compared to diesel, methanol solution is more corrosive, so there are special requirements for the material of the fuel tank. If the original diesel tank made of Q235B material is still used, it is easy to corrode and cause rust, leakage and other problems.

[0005] In addition, compared with diesel, the calorific value of methanol solution is lower, that is, the loader needs more methanol solution than diesel for the same operation time, and the original diesel tank volume cannot meet the corresponding methanol capacity demand; and refer to Figure 1 Because the space of the loader A' is limited and the original diesel tank A1' has tires A2' at the front and rear, it is impossible to increase the volume of the diesel tank A1' by widening the front and rear. Utility Model Content

[0006] The utility model aims to provide a methanol fuel tank for a loader, which can solve the problems of easy rust, leakage and insufficient volume of the above-mentioned fuel tank, and has the advantages of preventing rust and leakage, increasing volume and ensuring strength.

[0007] The utility model also provides a fixing structure of a methanol fuel tank of a loader, which has the advantage of stably and reliably fixing the methanol fuel tank to the loader.

[0008] In order to achieve the above purpose, the solution of the utility model is:

[0009] A loader methanol fuel tank comprises a first tank body and a second tank body;

[0010] The first box body and the second box body are both made of stainless steel;

[0011] The first box body has at least one first annular rib;

[0012] The second box is horizontally arranged on the top of the first box, and the two are conductively connected to each other;

[0013] The second box body has at least one second annular rib therein.

[0014] Furthermore, the first box is used to be installed between the front and rear wheels of the loader, and the second box is located above the front and rear wheels of the loader; the first box is a hollow box extending vertically in the upward and downward directions, and the second box is a hollow box extending horizontally in the forward and backward directions, and the top of the first box is connected to the bottom of the second box.

[0015] Furthermore, the outer edge of the first annular rib is connected to the side wall of the first box body, and the outer edge of the first annular rib is not connected to the weld position of the side wall of the first box body, and a first notch is formed at the unconnected position.

[0016] Furthermore, a partition extending left and right is provided in the middle of the second box body, and the left and right ends of the partition are respectively connected to the left side wall and the right side wall of the second box body, and the second box body is divided into two front and rear interconnected chambers; there are at least two second annular ribs, which are respectively arranged in the chambers, and the outer edges of the second annular ribs are respectively connected to the side walls and the partition of the second box body, and the outer edges of the second annular ribs are not connected to the welding positions of the side walls of the second box body and the welding positions of the partition, and a second notch is also formed at the unconnected positions.

[0017] Furthermore, the top surface of the second box body is set as a platform; and a handle is provided on the outer wall of the second box body.

[0018] The utility model also provides a fixing structure of a loader methanol fuel tank, comprising a methanol fuel tank, a fixing bracket and a rubber piece;

[0019] The methanol fuel tank comprises a first tank body, and the first tank body is made of stainless steel;

[0020] The fixing bracket is used to mount the first box frame on the loader, and the rubber member is arranged between the first box and the fixing bracket to isolate the first box and the fixing bracket.

[0021] Furthermore, the fixing bracket includes a fixing plate, a side limiting belt, a lower supporting member and an upper limiting member; the rubber member includes a rubber plate and a rubber sleeve;

[0022] The fixing plate is fixed to the loader and is located between the first box and the loader, and a rubber plate is arranged between the fixing plate and the first box; the side limiting belt is a steel belt, and is covered with a rubber sleeve; the side limiting belt is arranged around and closely attached to the outer side wall of the first box away from the fixing plate, and the two ends of the side limiting belt are respectively locked and fixed to the fixing plate;

[0023] The lower support member is connected to the fixed plate and is located below the first box body, and a rubber plate is provided between the lower support member and the first box body; the upper limit member is connected to the fixed plate and is located above the first box body, and a rubber plate is provided between the upper limit member and the first box body.

[0024] Furthermore, the fixed bracket also includes a side bracket, which includes a first bracket and a second bracket that are symmetrically arranged with each other, one end of the first bracket and the second bracket are connected and tightly attached to the outer side of the side limiting belt, and the other ends of the first bracket and the second bracket are respectively connected to the fixed plate; the first bracket or the second bracket has a mounting plate.

[0025] Furthermore, the first box body is a hollow box body extending vertically in the upward and downward directions; and the side limit belts are provided with at least two, and are arranged around the outside of the first box body with upper and lower intervals; the side brackets are provided with two groups of first brackets and second brackets corresponding to the side limit belts; and the first brackets with upper and lower intervals are connected with a first vertical plate, and the second brackets with upper and lower intervals are connected with a second vertical plate, and the first bracket and the second bracket are connected and fixed by the tight locking of the first vertical plate and the second vertical plate.

[0026] Furthermore, the side bracket also includes two vertical rods, both of which extend up and down, one of which is connected to two first brackets and a lower support member spaced up and down, and the other is connected to two second brackets and a lower support member spaced up and down, and a rubber plate is provided between the vertical rod and the first box body.

[0027] After adopting the above-mentioned methanol fuel tank technical solution, the first tank body and the second tank body are both made of stainless steel; the tank body made of stainless steel is resistant to corrosion by methanol and is not easy to rust, and two tank bodies are set up to increase the overall capacity of the methanol fuel tank, and the upper and lower distribution design is convenient for installation on a loader with limited space, and the volume of the methanol fuel tank can be increased to 500L to meet the needs of the loader working for a long time; and the first tank body is provided with a first annular rib, and the second tank body is provided with a second annular rib, which can increase the structural strength of the tank body and meet the complex working conditions of the loader.

[0028] After adopting the above-mentioned fixed structure technical solution, by setting the rubber part, the stainless steel first box body and the fixed bracket can be physically separated. The fixed bracket is usually made of carbon steel, thereby physically separating the stainless steel and the carbon steel to avoid electrochemical corrosion of the stainless steel; at the same time, the rubber part is set to provide a buffering and shock absorbing effect to protect the methanol fuel tank and increase the product service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of a loader in the prior art;

[0030] Figure 2 A schematic diagram of a loader according to an embodiment of the utility model;

[0031] Figure 3 A perspective view of a methanol fuel tank according to an embodiment of the present utility model;

[0032] Figure 4 A three-dimensional diagram of the fixing structure of the methanol fuel tank according to an embodiment of the utility model;

[0033] Figure 5 Another perspective view of the methanol fuel tank fixing structure according to an embodiment of the utility model;

[0034] Figure 6 This is a cross-sectional view of the fixing structure of the methanol fuel tank according to an embodiment of the utility model;

[0035] Figure 7 This is a three-dimensional cross-sectional view of the methanol fuel tank fixing structure of the utility model embodiment;

[0036] Figure 8 Another three-dimensional cross-sectional view of the methanol fuel tank fixing structure according to an embodiment of the utility model;

[0037] Fig. 9 It is a three-dimensional schematic diagram of a fixing bracket and a rubber member according to an embodiment of the utility model;

[0038] Fig.10 for Fig. 9 Exploded diagram of .

[0039] Explanation of reference numerals: loader A, right front wheel A1, right rear wheel A2, cab A3, platform A4, ladder A5, methanol fuel tank 1, first box body 11, second box body 12, handle 121, partition 122, chamber 123, first annular rib 13, first notch 131, second annular rib 14, second notch 141, fixed bracket 2, fixed plate 21, side limiting belt 22, lower support member 23, upper limit member 24, side bracket 25, first bracket 251, second bracket 252, first vertical plate 253, second vertical plate 254, vertical rod 255, rubber member 3, rubber plate 31, rubber sleeve 32, mounting plate 4. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0041] like Figure 2 As shown, a loader methanol fuel tank 1 of the utility model is used to contain methanol and is installed on a loader A to provide the loader A with clean fuel.

[0042] See also Figure 3 As shown, a methanol fuel tank 1 of a loader A in this embodiment includes a first tank body 11 and a second tank body 12.

[0043] The first box body 11 and the second box body 12 are both made of stainless steel; the stainless steel may be 304 stainless steel. The boxes made of stainless steel are resistant to corrosion by methanol and are not prone to rust.

[0044] The first box 11 is used to be installed between the front and rear wheels of the loader A. Figure 1 In this embodiment, the first box body 11 is installed between the right front wheel A1 and the right rear wheel A2 on the right side of the cab of the loader A; the second box body 12 is horizontally arranged on the top of the first box body 11, and the two are connected to each other. At the same time, the second box body 12 is located above the front and rear wheels of the loader A to prevent the second box body 12 from interfering with the rotation of the front and rear wheels.

[0045] Therefore, two tank bodies are provided to increase the overall capacity of the methanol fuel tank 1 , and the design of the upper and lower distribution makes it easy to install on a loader A with limited space, and the volume of the methanol fuel tank 1 can be increased to 500L.

[0046] Another example Figures 6 to 8 The first box 11 may be a hollow box extending vertically in the up-down direction, and the second box 12 may be a hollow box extending horizontally in the front-back direction, and the top of the first box 11 is connected to the bottom of the second box 12. The vertically extending first box 11 is convenient for installation between the front and rear wheels, and the horizontally extending second box 12 can increase the volume and reduce the height, so that the top surface of the second box 12 can form a platform A4 of the cab A3, which is convenient for the driver to stand.

[0047] Specifically, the top surface of the second box body 12 can be set as the platform A4; and a handle 121 is provided on the outer wall of the second box body 12 to facilitate people to get on and off the platform A4.

[0048] like Figures 6 to 8The first box body 11 may have at least one first annular rib 13. In this embodiment, two first annular ribs 13 spaced apart from each other are provided in the first box body 11 to increase the structural strength of the first box body 11 so that the first box body 11 can adapt to the harsh working environment of the loader A.

[0049] The outer edge of the first annular rib 13 is connected to the side wall of the first box body 11, and the outer edge of the first annular rib 13 is not connected to the weld position of the side wall of the first box body 11 to avoid damage to the weld position, and a first notch 131 is formed at the not connected position. The first notch 131 can prevent the methanol solution from remaining on the first annular rib 13.

[0050] In this embodiment, at least one second annular rib 13 may be provided in the second box body 12, and the outer edge of the second annular rib 13 may be connected to the side wall of the second box body 12 (not shown), or connected to the side wall of the second box body 12 and the partition 122 as described below.

[0051] Specifically, a partition 122 extending left and right may be provided in the middle of the second box body 12, and the left and right ends of the partition 122 are respectively connected to the left and right walls of the second box body 12, and the second box body 12 is divided into two front and rear interconnected chambers 123; the partition 122 is arranged in the middle of the second box body 12, which can reduce the impact of the tidal force generated by the shaking of the methanol solution during the driving of the loader A on the box body, thereby improving the durability of the box body.

[0052] Furthermore, at least one second annular rib 14 may be disposed in the chamber 123 , and the purpose is also to increase the structural strength of the second box body 12 so that the second box body 12 can adapt to the harsh working environment of the loader A.

[0053] The outer edges of the second annular ribs 14 are respectively connected to the side walls of the second box body 12 and the partition 122, and the outer edges of the second annular ribs 14 are not connected to the welding positions of the side walls of the second box body 12 and the welding positions of the partition 122 to avoid damage to the welding positions, and the unconnected positions also form second notches 141. The second notches 141 can prevent methanol from remaining on the second annular ribs 14.

[0054] Furthermore, since the methanol fuel tank 1 is made of stainless steel, an electrochemical corrosion reaction will occur when stainless steel and carbon steel come into contact, causing the stainless steel to rust and age easily. Therefore, it is not possible to adopt the installation method of directly locking the crude oil tank on the loader A frame by bolts.

[0055] Therefore, if Figure 2 , Figure 4 , Figure 5 , Fig. 9 and Fig.10As shown, this embodiment further proposes a fixing structure of a methanol fuel tank 1 of a loader A, comprising the methanol fuel tank 1, a fixing bracket 2 and a rubber member 3; the fixing bracket 2 is used to frame and install the first box body 11 on the loader A, and the rubber member 3 is arranged between the first box body 11 and the fixing bracket 2 to separate the first box body 11 from the fixing bracket 2. By arranging the rubber member 3, the stainless steel first box body 11 and the fixing bracket 2 can be physically separated. The fixing bracket 2 is usually made of carbon steel, thereby physically separating the stainless steel from the carbon steel to avoid electrochemical corrosion of the stainless steel; at the same time, the rubber member 3 is arranged to provide a buffering and shock absorbing effect to protect the methanol fuel tank 1. In this embodiment, by fixing the first box body 11, the second box body 12 is naturally fixed.

[0056] See also Fig.10 The fixing bracket 2 includes a fixing plate 21, a side limiting belt 22, a lower support member 23 and an upper limiting member 24; the rubber member 3 includes a rubber plate 31 and a rubber sleeve 32, etc., and the shapes of the two can be adaptively adjusted according to needs.

[0057] The fixing plate 21 is fixed to the loader A and is located between the first box 11 and the loader A, and a rubber plate 31 is arranged between the fixing plate 21 and the first box 11; the side limiting belt 22 is a steel belt, and is covered with a rubber sleeve 32; in this embodiment, the rubber sleeve 32 is a half-covered manner, mainly covering the inner side of the side limiting belt 22 in contact with the first box 11, of course, the rubber sleeve 32 can also be a full-covered structure. The side limiting belt 22 is arranged around and closely attached to the outer side wall of the first box 11 away from the fixing plate 21, and the two ends of the side limiting belt 22 are respectively locked and fixed to the fixing plate 21, and the ends of the side limiting belt 22 can be locked to the fixing plate 21.

[0058] The lower support member 23 is connected to the fixing plate 21 and is located below the first box body 11. A rubber plate 31 is provided between the lower support member 23 and the first box body 11. The lower support member 23 may be a support plate structure, and a support tube may be further provided below the support plate.

[0059] The upper limit member 24 is connected to the fixing plate 21 and is located above the first box body 11 . A rubber plate 31 is provided between the upper limit member 24 and the first box body 11 .

[0060] Therefore, the fixing bracket 2 can be fixed to the frame of the loader A by means of the fixing plate 21, and then the first box body 11 and the fixing plate 21 are tied tightly with the rubber plate 31 therebetween by means of the side limiting belt 22, while the lower support member 23 supports the first box body 11, and the upper limit member 24 limits the first box body 11 from moving upward, so that the methanol fuel tank 1 can be firmly installed on the loader A, and can adapt to harsh and complex working conditions.

[0061] See also Fig. 9 The fixed bracket 2 also includes a side bracket 25, and the side bracket 25 includes a first bracket 251 and a second bracket 252 that are symmetrically arranged with each other. One end of the first bracket 251 and the second bracket 252 are connected and tightly attached to the outer side of the side limiting belt 22, and the other ends of the first bracket 251 and the second bracket 252 are respectively connected to the fixed plate 21; the first bracket 251 or the second bracket 252 has a mounting plate 4.

[0062] The side bracket 25 is provided to provide position limiting protection for the first box 11; and the first bracket 251 and the second bracket 252 are provided separately, which can facilitate installation, avoid squeezing the rubber sleeve 32 of the side limit belt 22, and protect the rubber sleeve 32 from damage. At the same time, the mounting plate 4 can be used to install the ladder A5, which is convenient for the driver to step on the ladder A5 of the first box 11, and then pull the handle 121 of the second box 12, so as to climb onto the platform A4 conveniently and safely and enter the cab A3.

[0063] In this embodiment, the top rear side of the first box body 11 is not completely connected to the second box body 12 , so the two ends of the upper limit member 24 can cross the top of the first box body 11 for limiting, and are connected to the fixing plate 21 through the first bracket 251 and the second bracket 252 .

[0064] like Figure 4 and Fig.10 In this embodiment, there are at least two side limiting belts 22, which are arranged at intervals up and down around the outside of the first box body 11 to improve the fixing effect of the first box body 11.

[0065] The side bracket 25 is provided with two sets of first brackets 251 and second brackets 252 corresponding to the side limiting belt 22; and the first brackets 251 spaced apart from each other are connected with a first vertical plate 253, and the second brackets 252 spaced apart from each other are connected with a second vertical plate 254. The first brackets 251 and the second brackets 252 are connected and fixed by the first vertical plate 253 and the second vertical plate 254 being tightly locked together, and the first vertical plate 253 and the second vertical plate 254 can be locked and fixed by bolts and nuts. The first vertical plate 253 and the second vertical plate 254 respectively connect the two first brackets 251 and the two second brackets 252 into one body, so as to facilitate assembly.

[0066] In this embodiment, the side bracket 25 further includes two vertical rods 255, both of which extend up and down, wherein one vertical rod 255 is connected to two first brackets 251 and the lower support member 23 that are spaced up and down, and the other vertical rod 255 is connected to two second brackets 252 and the lower support member 23 that are spaced up and down, and a rubber plate 31 is provided between the vertical rod 255 and the first box body 11. The vertical rod 255 is provided to improve the structural strength of the side bracket 25 and further improve the limiting and protection of the first box body 11.

[0067] The above is only a preferred embodiment of the utility model, and the protection scope of the utility model is not limited to the above embodiments. All technical solutions under the idea of ​​the utility model belong to the protection scope of the utility model. It should be pointed out that for ordinary technicians in this technical field, equivalent changes and modifications without departing from the principle of the utility model should still fall within the protection scope of the utility model.

[0068] In the description of the embodiments of the present application, it should be understood that the indicated orientation or position relationship is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the product of the application is usually placed when in use, or is the orientation or position relationship commonly understood by technical personnel in this field. It is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0069] In addition, the terms "first", "second", "third", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "multiple" and "several" is two or more, unless otherwise clearly and specifically defined.

[0070] In the description of the embodiments of the present application, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or can communicate with each other; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0071] In addition, the present application provides examples of various specific processes and materials, but a person skilled in the art may be aware of the application of other processes and / or the use of other materials.

Claims

1. A methanol fuel tank for a loader, characterized in that: comprising a first box body and a second box body; The first box body and the second box body are both made of stainless steel; The first box body has at least one first annular rib; The second box is horizontally arranged on the top of the first box, and the two are conductively connected to each other; The second box body has at least one second annular rib therein.

2. The loader methanol fuel tank according to claim 1, characterized in that: The first box is used to be installed between the front and rear wheels of the loader, and the second box is located above the front and rear wheels of the loader; the first box is a hollow box extending vertically in the upward and downward directions, and the second box is a hollow box extending horizontally in the front and rear directions, and the top of the first box is connected to the bottom of the second box.

3. The loader methanol fuel tank according to claim 1, characterized in that: The outer edge of the first annular rib is connected to the side wall of the first box body, and the outer edge of the first annular rib is not connected to the weld position of the side wall of the first box body, and a first notch is formed at the unconnected position.

4. The loader methanol fuel tank according to claim 1, characterized in that: A partition extending left and right is provided in the middle of the second box body, and the left and right ends of the partition are respectively connected to the left side wall and the right side wall of the second box body, and the second box body is divided into two front and rear chambers that are interconnected; there are at least two second annular ribs, and they are respectively arranged in the chambers, and the outer edges of the second annular ribs are respectively connected to the side walls and the partition of the second box body, and the outer edges of the second annular ribs are not connected to the welding positions of the side walls of the second box body and the welding positions of the partition, and a second notch is also formed at the unconnected positions.

5. The loader methanol fuel tank according to claim 1, characterized in that: The top surface of the second box body is set as a platform; and a handle is provided on the outer wall of the second box body.

6. A fixing structure of a methanol fuel tank of a loader, characterized in that: Includes methanol fuel tank, fixing bracket and rubber parts; The methanol fuel tank comprises a first tank body, and the first tank body is made of stainless steel; The fixing bracket is used to mount the first box frame on the loader, and the rubber member is arranged between the first box and the fixing bracket to isolate the first box and the fixing bracket.

7. The fixing structure of the methanol fuel tank of a loader according to claim 6, characterized in that: The fixing bracket includes a fixing plate, a side limiting belt, a lower supporting member and an upper limiting member; the rubber member includes a rubber plate and a rubber sleeve; The fixing plate is fixed to the loader and is located between the first box and the loader, and a rubber plate is arranged between the fixing plate and the first box; the side limiting belt is a steel belt, and is covered with a rubber sleeve; the side limiting belt is arranged around and closely attached to the outer side wall of the first box away from the fixing plate, and the two ends of the side limiting belt are respectively locked and fixed to the fixing plate; The lower support member is connected to the fixed plate and is located below the first box body, and a rubber plate is provided between the lower support member and the first box body; the upper limit member is connected to the fixed plate and is located above the first box body, and a rubber plate is provided between the upper limit member and the first box body.

8. The fixing structure of the methanol fuel tank of a loader according to claim 7, characterized in that: The fixed bracket also includes a side bracket, which includes a first bracket and a second bracket symmetrically arranged with each other, one end of the first bracket and the second bracket are connected and tightly attached to the outer side of the side limiting belt, and the other ends of the first bracket and the second bracket are respectively connected to the fixed plate; the first bracket or the second bracket has a mounting plate.

9. The fixing structure of the methanol fuel tank of a loader according to claim 8, characterized in that: The first box body is a hollow box body extending vertically in the upward and downward directions; the side limit belts are provided with at least two, and are arranged around the outside of the first box body with upper and lower intervals; the side brackets are provided with two groups of first brackets and second brackets corresponding to the side limit belts; and the first brackets with upper and lower intervals are connected with a first vertical plate, and the second brackets with upper and lower intervals are connected with a second vertical plate, and the first bracket and the second bracket are connected and fixed by the first vertical plate and the second vertical plate being tightly locked.

10. The fixing structure of the methanol fuel tank of a loader according to claim 9, characterized in that: The side bracket also includes two vertical rods, both of which extend up and down, one of which is connected to two first brackets and a lower support member spaced up and down, and the other is connected to two second brackets and a lower support member spaced up and down, and a rubber plate is provided between the vertical rod and the first box body.

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