Hydrogen fuel cell excavator swing

Abstract

The application discloses a hydrogen fuel cell excavator rotary table, which comprises a rotary table main body, right skirt frames, left skirt frames and a hydrogen bottle frame bearing platform, the right skirt frames and the left skirt frames are symmetrically arranged on the two sides of the rotary table main body, the hydrogen bottle frame bearing platform is integrally formed with the rotary table main body, the right skirt frames and the left skirt frames through welding of horizontal and vertical reinforcing ribs at the tail portions of the rotary table main body, the right skirt frames and the left skirt frames, and forms a box type structure, the hydrogen fuel cell excavator rotary table has high tail portion strength, contains a platform structure for carrying a hydrogen bottle frame, has compact overall structure, reasonable layout and high space utilization rate.

Description

Technical Field

[0001] This invention relates to a turntable for a hydrogen fuel cell excavator, belonging to the technical field of hydrogen fuel cell excavators. Background Technology

[0002] Pure electric excavators are limited by battery energy density, resulting in short driving time and long charging time, which affects their working efficiency. Compared with pure electric excavators, hydrogen fuel cell excavators have advantages such as longer driving time and shorter refueling time. However, the hydrogen tank frame of a hydrogen fuel cell excavator is relatively large and heavy. Traditional diesel and pure electric excavators have short turntables, poor tail rigidity, and lack a platform structure to support the hydrogen tank frame. Therefore, a compact turntable with strong tail rigidity and a platform structure to support the hydrogen tank frame is needed.

[0003] The turntable of a traditional medium-sized diesel and pure electric excavator consists of three parts: the turntable body, the left skirt, and the right skirt.

[0004] The left and right skirt frames are welded to the main body of the turntable as a single unit. The rear panels of the left and right skirt frames are welded to the main body's upright plates via vertical fillet welds. The rear of the turntable consists of three independent box-shaped structures with openings at the top. The tail structure and the vertical fillet weld positions are as follows... Figure 1 As shown;

[0005] The disadvantages of existing technologies are as follows:

[0006] (1) The space at the rear of the turntable is too small to support the numerous components of the hydrogen fuel system.

[0007] (2) The tail of the turntable is separated into three independent box-shaped structures with upper openings by the upright plate of the turntable body. It cannot form a complete platform structure and cannot support a structure with large overall size and heavy weight, such as a hydrogen cylinder frame.

[0008] (3) The tails of the left and right skirt frames are mainly welded to the main body of the turntable through a vertical fillet weld. This results in greater stress on the upper part of the fillet weld, making it prone to cracking. The tails of the left and right skirt frames cannot withstand large loads. At the same time, the quality of the weld is highly dependent on the skill level of the welder. The inherent defects of the weld are not easy to detect, and the detection cost is high. Summary of the Invention

[0009] The purpose of this invention is to overcome the shortcomings of the prior art and provide a hydrogen fuel cell excavator turntable with high strength at the tail end, a platform structure containing a hydrogen tank frame, a compact overall structure, a reasonable layout, and high space utilization.

[0010] To achieve the above objectives, the present invention is implemented using the following technical solution:

[0011] In a first aspect, the present invention provides a hydrogen fuel cell excavator turntable, including a turntable body, a right skirt, a left skirt, and a hydrogen cylinder frame support platform. The right skirt and the left skirt are symmetrically arranged on both sides of the turntable body. The hydrogen cylinder frame support platform is welded to the turntable body, the right skirt, and the horizontal and vertical reinforcing ribs at the tail of the left skirt to form a box-shaped structure.

[0012] Furthermore, the main body of the turntable includes a large base plate, a rotary reducer seat ring, a main valve bracket mounting seat, a rear base plate, a first top plate, a second top plate, and an electric stack support;

[0013] The large base plate is located at the front end of the turntable body and is connected to the slewing bearing by bolts;

[0014] The rotary reducer seat ring is welded to the base plate and is an integral structure, which is connected to the rotary reducer by bolts;

[0015] The main valve bracket mounting base consists of four pieces, two of which are welded to the large base plate and the other two are welded to the rear base plate, and are connected to the main valve bracket by bolts.

[0016] The rear base plate is butt-welded to the large base plate, and the rear base plate is provided with fuel cell stack maintenance holes, fuel cell stack drain pipe through holes, and main valve maintenance holes.

[0017] The first top plate and the second top plate are arranged parallel to each other on the large base plate. The first top plate and the second top plate include oblique segments and horizontal segments.

[0018] Multiple fuel cell stack supports are respectively installed on the inclined and horizontal sections of the first and second top plates.

[0019] Furthermore, the fuel cell stack support includes fuel cell stack support one, fuel cell stack support two, fuel cell stack support three, and fuel cell stack support four. Fuel cell stack support one and fuel cell stack support four are located on the inclined sections of the first top plate and the second top plate, respectively, while fuel cell stack support two and fuel cell stack support three are located on the horizontal sections of the first top plate and the second top plate, respectively.

[0020] Furthermore, a notch is provided on one side of the fuel cell stack support, and the side of the first top plate is embedded into the notch of the fuel cell stack support and then welded together. The right rear upright plate on the right skirt frame is attached to the side of the fuel cell stack support and then welded together.

[0021] Furthermore, the right skirt frame includes a motor base crossbeam one, a motor base crossbeam two, a hydraulic oil tank base, a power battery frame mounting plate, and a first reinforcing rib;

[0022] The first and second motor base beams are located at the front end of the right skirt frame. The motor base beams are provided with motor base shock absorber mounting holes and are connected to the motor through the shock absorber.

[0023] The hydraulic oil tank base is located at the rear of the second crossbeam of the motor base and is connected to the hydraulic oil tank by bolts.

[0024] The power battery frame mounting plate is located between the hydraulic oil tank base and the first reinforcing rib, and is connected to the power battery frame by bolts.

[0025] The first reinforcing rib is located at the rear of the right skirt frame and is welded to the hydrogen cylinder frame support platform as a whole.

[0026] Furthermore, the left skirt frame includes a cab crossbeam one, a cab crossbeam two, a cab crossbeam three, a hydraulic oil radiator base bend plate one, a hydraulic oil radiator base bend plate two, an air conditioning system mounting plate, a battery mounting plate, a fuel cell stack radiator base bend plate, and a second reinforcing rib.

[0027] The first cab crossbeam, the second cab crossbeam, and the third cab crossbeam are located at the front end of the left skirt frame;

[0028] The hydraulic oil radiator base bend plate one and hydraulic oil radiator base bend plate two are located on the rear side of the cab crossbeam three and are connected to the hydraulic oil radiator by bolts. The hydraulic oil radiator base bend plate two is provided with a fixed seat and connected to the hydraulic oil radiator tie rod.

[0029] The air conditioning system mounting plate is located between the first and second curved plates of the hydraulic oil radiator base, and is connected to the PTC mounting bracket and the air conditioning compressor mounting bracket by bolts.

[0030] The battery mounting plate is located on the rear side of the second bent plate of the hydraulic oil radiator base, and the battery is fixed by a tie rod.

[0031] The bent plate of the fuel cell stack radiator base is located on the right side of the battery mounting plate and is connected to the fuel cell stack radiator by bolts.

[0032] The second reinforcing rib is located at the rear of the left skirt frame and is welded to the hydrogen cylinder frame support platform as a whole.

[0033] Furthermore, the hydrogen cylinder frame support platform includes a base plate and a pad plate. The base plate is welded to the turntable body, the right skirt frame, and the horizontal and vertical reinforcing ribs at the tail of the left skirt frame to form a box-shaped structure.

[0034] The pad is welded to the upper surface of the base plate and connected to the hydrogen cylinder frame by bolts.

[0035] Furthermore, the pad is provided with an adjustment pad to ensure the flatness of the hydrogen cylinder frame support platform.

[0036] Compared with the prior art, the beneficial effects achieved by the present invention are as follows:

[0037] This invention provides a hydrogen fuel cell excavator turntable with high strength at the rear and a platform structure containing a hydrogen tank frame. The overall structure is compact, rationally laid out, and has high space utilization. Attached Figure Description

[0038] Figure 1 This is a schematic diagram of the turntable of a traditional medium-sized diesel and pure electric excavator provided in the background art of this invention;

[0039] Figure 2 This is a schematic diagram of the structure of a hydrogen fuel cell excavator turntable provided in an embodiment of the present invention;

[0040] Figure 3 This is a schematic diagram of the main structure of the turntable provided in an embodiment of the present invention;

[0041] Figure 4 This is a schematic diagram of the fuel cell stack support structure provided in an embodiment of the present invention;

[0042] Figure 5 This is a schematic diagram of the right skirt frame structure provided in an embodiment of the present invention;

[0043] Figure 6 This is a schematic diagram of the left skirt frame structure provided in an embodiment of the present invention;

[0044] Figure 7 This is a schematic diagram of the hydrogen cylinder frame support platform structure provided in an embodiment of the present invention;

[0045] Figure 8 This is a schematic diagram of the main load-bearing components of the turntable provided in an embodiment of the present invention.

[0046] In the diagram: 1. Turntable body; 11. Base plate; 12. Rotary reducer seat ring; 13. Main valve bracket mounting seat; 14. Right rear upright plate; 15. Fuel cell stack support; 151. Fuel cell stack support one; 1511. Notch; 1512. Side of fuel cell stack support; 152. Fuel cell stack support two; 153. Fuel cell stack support three; 154. Fuel cell stack support four; 16. First top plate; 17. Second top plate; 18. Rear base plate; 181. Fuel cell stack inspection hole; 182. Fuel cell stack drain pipe through hole; 183. Main valve inspection hole; 2. Right skirt frame; 21. Motor base crossbeam one; 211. Motor base shock absorber mounting hole; 22. Motor base crossbeam two; 23. Hydraulic oil tank base; 24. Power battery frame mounting plate. 25. First reinforcing rib; 3. Left skirt frame; 31. Cab crossbeam one; 32. Cab crossbeam two; 33. Cab crossbeam three; 34. Hydraulic oil radiator base bend plate one; 35. Air conditioning system mounting plate; 36. Hydraulic oil radiator base bend plate two; 37. Battery mounting plate; 38. Fuel cell stack radiator base bend plate; Second reinforcing rib 39; 4. Hydrogen cylinder frame support platform; 41. Base plate; 42. Pad plate; 5. Motor; 6. Hydraulic oil tank; 7. Rotary reducer; 8. Main valve; 9. Power battery; 10. Fuel cell stack; 011. Hydrogen cylinder frame; 012. Hydraulic oil radiator; 013. PTC; 014. Air conditioning compressor; 015. Battery; 016. Fuel cell stack radiator. Detailed Implementation

[0047] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and should not be used to limit the scope of protection of the present invention.

[0048] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0049] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0050] Example 1

[0051] like Figures 1-8 As shown in the attached figure, this embodiment introduces a hydrogen fuel cell excavator turntable. Figure 1 As shown, it includes a turntable body 1, a right skirt 2, a left skirt 3, and a hydrogen cylinder frame support platform 4.

[0052] Main structural components of turntable body 1: as shown in the attached figure Figure 2 As shown, the large base plate 11 is located at the front end of the turntable body 1 and is connected to the slewing bearing by bolts;

[0053] The rotary reducer race 12 is welded to the base plate 11, forming a one-piece structure with high strength and resistance to cracking. It is connected to the rotary reducer 7 by bolts.

[0054] The main valve bracket mounting seats 13 (4 pieces in total) are located at the rear of the rotary reducer race 12. Two of them are welded to the base plate 11, and the other two are welded to the rear base plate 18. They are connected to the main valve 8 bracket by bolts.

[0055] The rear base plate 18 is butt-welded to the large base plate 11. The rear base plate 18 is provided with a fuel cell stack inspection hole 181, a fuel cell stack drain pipe through hole 182, and a main valve inspection hole 183.

[0056] The fuel cell stack support 15 includes fuel cell stack support one 151, fuel cell stack support two 152, fuel cell stack support three 153, and fuel cell stack support four 154. Fuel cell stack support one 151 and fuel cell stack support four 154 are located on the inclined sections of the first top plate 16 and the second top plate 17, respectively, while fuel cell stack support two 152 and fuel cell stack support three 153 are located on the horizontal sections of the first top plate 16 and the second top plate 17, respectively. The structures of each fuel cell stack support 15 are similar; taking fuel cell stack support one 151 as an example, as shown in the attached diagram. Figure 3 As shown, the first top plate 16 is embedded into the notch 1511 of the fuel cell support 151 and then welded together. The right rear upright plate 14 is attached to the side 1512 of the fuel cell support 151 and then welded together. The structure is reliable and has high strength.

[0057] The main structural components of right skirt frame 2 are as shown in the attached diagram. Figure 4As shown, the first motor base beam 21 and the second motor base beam 22 are located at the front end of the right skirt 2. The motor base beam is provided with motor base shock absorber mounting holes 211, which are connected to the motor 5 through the shock absorber.

[0058] The hydraulic oil tank base 23 is located at the rear of the motor base crossbeam 22 and is connected to the hydraulic oil tank 6 by bolts.

[0059] The power battery frame mounting plate 24 is located between the hydraulic oil tank base 23 and the first reinforcing rib 25, and is connected to the power battery 9 frame by bolts.

[0060] The first reinforcing rib 25 is located at the tail of the right skirt frame 2, and is composed of horizontal and vertical stiffening plates, and is welded to the hydrogen cylinder frame support platform 4 as a whole.

[0061] The main structural components of the left skirt frame 3 are as shown in the attached document. Figure 4 As shown, cab crossbeam 1 31, cab crossbeam 2 32, and cab crossbeam 33 are located at the front end of the left skirt frame 3 and serve to support the cab.

[0062] The hydraulic oil radiator base bend plate 1 34 and the hydraulic oil radiator base bend plate 2 36 are located behind the cab crossbeam 3 33 and are connected to the hydraulic oil radiator 012 by bolts. The hydraulic oil radiator base bend plate 2 36 is provided with a fixed seat 361 connected to the hydraulic oil radiator 012 tie rod to improve the stability of the hydraulic oil radiator 012.

[0063] The air conditioning system mounting plate 35 is located between the hydraulic oil radiator base bend plate 1 34 and the hydraulic oil radiator base bend plate 2 36, and is connected to the PTC013 mounting bracket and the air conditioning compressor 014 mounting bracket by bolts.

[0064] The battery mounting plate 37 is located behind the curved plate 36 of the hydraulic oil radiator base, and the battery 015 is fixed by a tie rod.

[0065] The bent plate 38 of the fuel cell stack radiator base is located on the right side of the battery mounting plate 37 and is connected to the fuel cell stack radiator 016 by bolts. The opening of the bent plate faces upward, which can effectively reduce the height of the fuel cell stack radiator 016 and improve the stability of the hydraulic oil radiator 012.

[0066] The second reinforcing rib 39 is located at the tail of the left skirt frame 3, and is composed of horizontal and vertical stiffening plates, and is welded to the hydrogen cylinder frame support platform 4 as a whole.

[0067] The main structural components of the hydrogen cylinder frame support platform 4 are as follows: Figure 6 As shown, it consists of a base plate 41 and a pad plate 42 (a total of six pieces). The base plate 41 is welded to the turntable body 1, the right skirt 2, and the horizontal and vertical reinforcing ribs at the tail of the left skirt 3 to form a box-shaped structure, which improves the strength of the tail of the turntable and avoids the situation where the tail fillet weld is subjected to large stress in the traditional solution.

[0068] The pad 42 is welded to the upper surface of the base plate 41 and connected to the hydrogen cylinder frame 011 by bolts. The flatness of the hydrogen cylinder frame bearing platform 4 can be ensured by adding an adjustment pad to the pad 42. This can avoid deformation after the turntable is welded and formed, and prevent the flatness of the base plate 41 from failing to meet the requirements.

[0069] This invention provides a hydrogen fuel cell excavator turntable with high strength at the rear and a platform structure containing a hydrogen tank frame. The overall structure is compact, rationally laid out, and has high space utilization.

[0070] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A hydrogen fuel cell excavator turntable, characterized in that, It includes a turntable body (1), a right skirt frame (2), a left skirt frame (3) and a hydrogen cylinder frame support platform (4). The right skirt frame (2) and the left skirt frame (3) are symmetrically arranged on both sides of the turntable body (1). The hydrogen cylinder frame support platform (4) is welded to the horizontal and vertical reinforcing ribs at the tail of the turntable body (1), the right skirt frame (2) and the left skirt frame (3) to form a box-shaped structure. The turntable body (1) includes a large base plate (11), a rotary reducer seat ring (12), a main valve bracket mounting seat (13), a rear base plate (18), a first top plate (16), a second top plate (17), and an electric stack support (15); The large base plate (11) is located at the front end of the turntable body (1) and is connected to the slewing bearing by bolts; The rotary reducer seat ring (12) is welded to the base plate (11) and is an integral structure. It is connected to the rotary reducer (7) by bolts. The main valve bracket mounting base (13) consists of four pieces, two of which are welded to the base plate (11) and the other two are welded to the rear base plate (18), and are connected to the main valve (8) bracket by bolts. The rear base plate (18) is butt-welded to the large base plate (11). The rear base plate (18) is provided with a fuel cell stack inspection hole (181), a fuel cell stack drain pipe through hole (182), and a main valve inspection hole (183). The first top plate (16) and the second top plate (17) are arranged in parallel on the large base plate (11). The first top plate (16) and the second top plate (17) include oblique segments and horizontal segments. Multiple fuel cell stack supports (15) are respectively installed on the oblique and horizontal sections of the first top plate (16) and the second top plate (17).

2. The hydrogen fuel cell excavator turntable according to claim 1, characterized in that, The fuel cell stack support (15) includes fuel cell stack support one (151), fuel cell stack support two (152), fuel cell stack support three (153), and fuel cell stack support four (154). Fuel cell stack support one (151) and fuel cell stack support four (154) are located on the oblique sections of the first top plate (16) and the second top plate (17), respectively. Fuel cell stack support two (152) and fuel cell stack support three (153) are located on the horizontal sections of the first top plate (16) and the second top plate (17), respectively.

3. The hydrogen fuel cell excavator turntable according to claim 2, characterized in that, A notch (1511) is provided on one side of the fuel cell stack support (151). The side of the first top plate (16) is embedded into the notch (1511) of the fuel cell stack support (151) and then welded together. The right rear upright plate (14) on the right skirt frame (2) is attached to the side (1512) of the fuel cell stack support (151) and then welded together.

4. The hydrogen fuel cell excavator turntable according to claim 1, characterized in that, The right skirt frame (2) includes a motor base beam one (21), a motor base beam two (22), a hydraulic oil tank base (23), a power battery frame mounting plate (24), and a first reinforcing rib (25); The first motor base beam (21) and the second motor base beam (22) are located at the front end of the right skirt frame (2). The motor base beam is provided with a motor base shock absorber mounting hole (211) and is connected to the motor (5) through the shock absorber. The hydraulic oil tank base (23) is located at the rear of the motor base crossbeam two (22) and is connected to the hydraulic oil tank (6) by bolts; The power battery frame mounting plate (24) is located between the hydraulic oil tank base (23) and the first reinforcing rib (25), and is connected to the power battery (9) frame by bolts; The first reinforcing rib (25) is located at the tail of the right skirt frame (2) and is welded to the hydrogen cylinder frame support platform (4) as a whole.

5. The hydrogen fuel cell excavator turntable according to claim 1, characterized in that, The left skirt frame (3) includes a cab crossbeam one (31), a cab crossbeam two (32), a cab crossbeam three (33), a hydraulic oil radiator base bend plate one (34), a hydraulic oil radiator base bend plate two (36), an air conditioning system mounting plate (35), a battery mounting plate (37), a fuel cell stack radiator base bend plate (38), and a second reinforcing rib (39). The cab crossbeam one (31), cab crossbeam two (32), and cab crossbeam three (33) are located at the front end of the left skirt frame (3); The hydraulic oil radiator base bend plate one (34) and hydraulic oil radiator base bend plate two (36) are located on the rear side of the cab crossbeam three (33) and are connected to the hydraulic oil radiator (012) by bolts. The hydraulic oil radiator base bend plate two (36) is provided with a fixed seat (361) and connected to the hydraulic oil radiator tie rod. The air conditioning system mounting plate (35) is located between the first (34) and the second (36) of the hydraulic oil radiator base bend plate, and is connected to the PTC (013) mounting bracket and the air conditioning compressor (014) mounting bracket by bolts; The battery mounting plate (37) is located on the rear side of the hydraulic oil radiator base bending plate two (36), and the battery (015) is fixed by a tie rod; The base plate (38) of the fuel cell stack radiator is located on the right side of the battery mounting plate (37) and is connected to the fuel cell stack radiator by bolts; The second reinforcing rib (39) is located at the tail of the left skirt frame (3) and is welded to the hydrogen cylinder frame support platform (4) as a whole.

6. The hydrogen fuel cell excavator turntable according to claim 1, characterized in that, The hydrogen cylinder frame support platform (4) includes a base plate (41) and a pad plate (42). The base plate (41) is welded to the turntable body (1), the right skirt frame (2), and the horizontal and vertical reinforcing ribs at the tail of the left skirt frame (3) to form a box-shaped structure. The pad (42) is welded to the upper surface of the base plate (41) and connected to the hydrogen cylinder frame (011) by bolts.

7. The hydrogen fuel cell excavator turntable according to claim 6, characterized in that, The pad (42) is provided with an adjustment pad to ensure the flatness of the hydrogen cylinder frame support platform (4).

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