A large-scale aerial work platform sub-frame

Abstract

The application discloses a large-scale high-altitude operation vehicle sub-frame, which comprises first and second fixed leg boxes, a longitudinal beam structure and a rotary support seat, the first and second fixed leg boxes are respectively welded at two ends of the longitudinal beam structure, the longitudinal beam structure is welded with the rotary support seat to form a box structure, and the longitudinal center line of the rotary support seat is offset to the right relative to the longitudinal center line of the longitudinal beam structure, so that the stress of the whole vehicle weight on the left and right wheels is balanced. The sub-frame is welded together by the two side webs, the bottom plate and the cover plate in the shape of bending, forms a horn-shaped box structure, the partition plate and the middle web are added in the box type, a "wood son" cavity structure is formed, the stiffness and strength of the sub-frame in multiple directions and the torsional capacity are effectively improved, meanwhile, the connection position of the rotary support seat and the longitudinal beam structure is designed as a double-layer box structure plus a local small box structure, and the strength of the sub-frame near the rotary support seat is further improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of high-altitude operation equipment, and particularly relates to a large-amplitude high-altitude operation vehicle subframe. BACKGROUND

[0002] The high-altitude operation vehicle is a special vehicle modified on a vehicle chassis, which is used to transport workers and work equipment to a specified height for operation. The subframe of the high-altitude operation vehicle is provided with a rotating support seat, an arm support and other components on the upper portion, and is connected with the vehicle chassis on the lower portion. The subframe is a key component of the high-altitude operation vehicle, and the structure and performance of the subframe directly affect the driving performance and operation performance of the high-altitude operation vehicle.

[0003] The subframe of the existing high-altitude operation vehicle generally adopts a rectangular box structure to improve the strength and rigidity of the subframe. Generally, the left and right web plates are respectively a flat plate and a cover plate and a longitudinal beam structure formed by the bottom plate, which is a rectangular box type. Rectangular reinforcing plates are arranged along the longitudinal direction of the subframe to divide the internal box type of the longitudinal beam structure into multiple rectangular cavities. The length direction of the rectangular reinforcing plate is along the transverse direction of the subframe, and the transverse direction of the subframe is perpendicular to the longitudinal direction of the subframe, which is also the longitudinal direction and the transverse direction of the high-altitude operation vehicle. All the reinforcing plates are supported by the bottom plate and covered by the top plate. In this case, the single rectangular reinforcing plate has limited effect on improving the structural strength and rigidity, and the torsional strength is relatively poor. The rectangular box structure can still meet the overall strength and rigidity requirements of the subframe in the medium and small height high-altitude operation vehicle, but it is difficult to meet the stress requirements in the large height high-altitude operation vehicle. In addition, the center line of the rotating support seat is usually coincided with the longitudinal center line of the longitudinal beam structure, and when the layout of the upper vehicle structure is unbalanced, the subframe cannot balance the stress of the left and right wheels of the whole vehicle.

[0004] Therefore, the performance and reliability of the subframe of the large height high-altitude operation vehicle still need to be further improved. SUMMARY

[0005] The problem to be solved by the present application is to provide a large-amplitude high-altitude operation vehicle subframe for improving the operation performance and reliability of the high-altitude operation vehicle.

[0006] The present application adopts the following technical scheme: a large-amplitude high-altitude operation vehicle subframe, comprising: a first fixed leg box, a rotating support seat, a longitudinal beam structure, and a second fixed leg box.

[0007] The first fixed leg box and the second fixed leg box are respectively welded to the two ends of the longitudinal beam structure, the rotating support seat is welded to the side of the longitudinal beam structure close to the second fixed leg box, and the longitudinal beam structure passes through the rotating support seat.

[0008] The center line of the first fixed leg box and the second fixed leg box coincides with the center line of the longitudinal beam structure, and the center line of the rotary support seat is offset to the right of the center line of the longitudinal beam structure by a distance e.

[0009] Further, the longitudinal beam structure comprises a first partition plate, a right web plate, a second partition plate, a third partition plate, a middle web plate, a cover plate, a left web plate and a bottom plate; the right web plate and the left web plate are each bent along the longitudinal direction of the auxiliary frame; the right web plate, the left web plate, the cover plate and the bottom plate form a horn-shaped box; and the middle web plate, the first partition plate, the second partition plate and the third partition plate are arranged inside the box.

[0010] Preferably, the third partition plate inside the box of the longitudinal beam structure is multiple, and is arranged at intervals along the longitudinal direction of the auxiliary frame, so as to divide the inside of the box into multiple rectangular cavities; the first partition plate and the second partition plate are arranged on both sides of the middle web plate, and connect the third partition plate, the middle web plate, the right web plate and the left web plate together to form a 'wooden son' cavity structure.

[0011] Preferably, the auxiliary frame is further provided with a first bent plate, a second bent plate and a third bent plate.

[0012] The longitudinal beam structure is welded to the rotary support seat to form a large box structure; since the longitudinal center line of the rotary support seat is offset to the right of the longitudinal center line of the longitudinal beam structure, the right side of the box of the rotary support seat is correspondingly reduced and insufficient in strength, and therefore the first bent plate is arranged to wrap the right side of the rotary support seat and the longitudinal beam structure to form a local box.

[0013] In order to further strengthen the strength of the rotary support seat, the second bent plate and the third bent plate are arranged to be welded to the rotary support seat and the longitudinal beam structure, so that the auxiliary frame forms a double-layer box structure in the vertical plane.

[0014] Preferably, the auxiliary frame is used for connecting a high-altitude working vehicle chassis and a rotary table, and is used for realizing the connection between the chassis and the superstructure; the longitudinal center line of the longitudinal beam structure coincides with the longitudinal center line of the high-altitude working vehicle chassis; and the longitudinal center line of the rotary support seat coincides with the longitudinal center line of the rotary table of the superstructure of the high-altitude working vehicle.

[0015] The longitudinal center line of the rotary support seat is offset to the right of the longitudinal center line of the longitudinal beam structure by a distance e:

[0016] e=M1*L / (M1+M2)

[0017] Wherein, M1 is the sum of the mass of the second arm and the mass of the curved arm of the high-altitude working vehicle, M2 is the sum of the mass of the rotary table and the mass of the first arm of the high-altitude working vehicle, and L is the distance between the longitudinal center line of the second arm and the longitudinal center line of the first arm of the high-altitude working vehicle.

[0018] Compared with the prior art, the above technical scheme has the following technical effects:

[0019] 1. When the upper structure arrangement of the large-height aerial work platform has a large weight deviation, the longitudinal center line of the rotary support seat of the auxiliary frame deviates from the longitudinal center line of the longitudinal beam structure, which can effectively balance the stress of the whole vehicle weight on the left and right wheels.

[0020] 2. When the large-height aerial work platform has high requirements for the stiffness and strength of the auxiliary frame in multiple directions, the auxiliary frame of the present application is welded together by the bent shape of the two side webs, the bottom plate and the cover plate to form a horn-shaped box structure, and the inside of the box is increased with a baffle and a middle web to form a "wood seed" cavity structure, which effectively improves the stiffness and strength of the auxiliary frame in multiple directions and the torsional capacity.

[0021] 3. When the strength near the rotary support seat of the auxiliary frame of the large-height aerial work platform is insufficient, the connection position of the rotary support seat and the longitudinal beam structure of the auxiliary frame is designed as a double-layer box structure plus a local small box structure, which can effectively improve the strength near the rotary support seat of the auxiliary frame. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is a structure diagram of the aerial work platform in driving state;

[0023] Figure 2 is a structure diagram of the aerial work platform in driving state;

[0024] Figure 3 is a three-dimensional structure diagram of the auxiliary frame of the aerial work platform of the present application;

[0025] Figure 4 is a top view structure diagram of the auxiliary frame of the aerial work platform of the present application;

[0026] Figure 5 is a exploded structure diagram of the auxiliary frame of the aerial work platform of the present application;

[0027] BRIEF DESCRIPTION OF DRAWINGS: 11- first fixed leg box; 12- longitudinal beam structure; 13- rotary support seat; 14- second fixed leg box; 121- first baffle; 122- right web; 123- second baffle; 124- third baffle; 125- middle web; 126- cover plate; 127- left web; 128- bottom plate; 10- auxiliary frame; 20- movable leg; 30- chassis; 40- secondary arm; 50- curved arm; 60- primary arm; 70- turntable. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical scheme and advantages of the present application more clear, the technical scheme of the application is further described in detail below in combination with the drawings, and the described embodiments are only a part of the embodiments involved in the present application. All non-innovative embodiments of other researchers in the field on the embodiments belong to the protection scope of the present application. Meanwhile, the step numbers in the embodiments are only set for the convenience of description and explanation, and the order between the steps is not limited in any way, and the execution order of each step in the embodiments can be adaptively adjusted according to the understanding of those skilled in the art.

[0029] The large-scale aerial work vehicle auxiliary frame can balance the whole vehicle weight between the left and right tires in the vehicle driving state, and can improve the rigidity and strength performance of the auxiliary frame in the horizontal and vertical directions and the torsion resistance of the auxiliary frame in the vehicle working state, thereby improving the working performance and reliability of the aerial work vehicle.

[0030] The large-scale aerial work vehicle generally comprises a lower vehicle structure and an upper vehicle structure, as shown in Figure 1 It can be understood that the driving direction of the aerial work vehicle is forward, the front-rear direction is defined as the longitudinal direction, and the left-right direction is defined as the transverse direction.

[0031] The lower vehicle structure comprises an auxiliary frame 10, a movable leg 20 and a chassis 30, and the upper vehicle structure comprises a first arm 60, a second arm 40, a curved arm 50, a rotating platform 70 and other working mechanisms. The second arm 40 and the curved arm 50 are transversely arranged on the aerial work vehicle, and the longitudinal center line of the first arm 60 coincides with the longitudinal center line of the rotating platform 70.

[0032] The auxiliary frame 10 connects the chassis 30 and the rotating platform 70 to realize the connection between the chassis 30 and the upper vehicle structure. As shown in Figure 2 The working mechanism is connected to the rotating platform 50, and it can be seen that the second arm 40 and the curved arm 50 transport workers and working equipment to the designated position or height for work by changing the amplitude angle.

[0033] In an embodiment of the present application, the aerial work vehicle auxiliary frame 10, as shown in Figure 3 and Figure 4 comprises a first fixed leg box 11, a longitudinal beam structure 12, a rotating support seat 13 and a second fixed leg box 14.

[0034] The first fixed leg box 11 and the second fixed leg box 14 are respectively welded at both ends of the longitudinal beam structure 12, the rotary support base 13 is welded to the longitudinal beam structure 12, and the longitudinal beam structure 12 passes through the rotary support base 13; the longitudinal center line of the first fixed leg box 11 and the second fixed leg box 14 coincides with the longitudinal center line of the longitudinal beam structure 12, the longitudinal center line of the longitudinal beam structure 12 coincides with the longitudinal center line of the chassis 30, the longitudinal center line of the rotary support base 13 coincides with the longitudinal center line of the turntable 50 of the superstructure, and the longitudinal center line of the rotary support base 13 is offset from the longitudinal center line of the longitudinal beam structure 12 by a distance e.

[0035] Further, in the embodiment, the sum of the masses of the secondary arm 40 and the curved arm 50 is M1, the sum of the masses of the turntable 70 and the primary arm 60 is M2, the distance between the longitudinal center line of the secondary arm 40 and the longitudinal center line of the primary arm 60 is L, and if the longitudinal center line of the rotary support base 13 of the subframe coincides with the longitudinal center line of the longitudinal beam structure 03, the left side of the vehicle will be overweighted by M1. In order to balance the lateral load between the left and right wheels of the vehicle, the longitudinal center line of the rotary support base 13 is offset from the longitudinal center line of the longitudinal beam structure 12 by a distance e to the right:

[0036] e = M1*L / (M1+M2)

[0037] Based on the above setting, in any allowed working state, the working load of the superstructure is transmitted to the subframe 10 through the rotary support base 13, and is transmitted to the fixed leg boxes 11 and 14 at both ends through the longitudinal beam structure 12, and is finally transmitted to the ground through the movable legs 20, thereby preventing the aerial work vehicle from tipping over.

[0038] It can be seen that the subframe 10 is a key component that affects the stability of the aerial work vehicle. Therefore, the performance of the subframe 10 directly affects the overall performance of the aerial work vehicle. Generally, the subframe 10 is required to have sufficient strength and rigidity in the vertical plane direction and the horizontal plane direction to meet the demand of the overall working performance of the vehicle.

[0039] In the related art, a box-shaped structure in the form of a rectangle is generally used to improve the strength and rigidity of the subframe 10. Generally, the left and right webs are respectively a longitudinal beam structure 12 formed by a flat plate, a cover plate and a bottom plate in the form of a rectangle, and rectangular reinforcing plates are arranged inside the rectangular box-shaped structure along the longitudinal direction of the subframe 10 to divide the inside of the rectangular box-shaped structure into multiple rectangular cavities. The length direction of the rectangular reinforcing plates is along the transverse direction of the subframe 10 (the transverse direction of the subframe 10 is perpendicular to the longitudinal direction of the subframe 10, and is also the longitudinal direction and the transverse direction of the aerial work vehicle 100). All the reinforcing plates are supported by the bottom plate and covered by the top plate.

[0040] In this case, the single rectangular reinforcing plate has limited effect on the improvement of the structural strength and rigidity, and the torsional strength is relatively poor. The rectangular box structure can still meet the overall strength and rigidity requirements of the auxiliary frame 10 in a small or medium height aerial work vehicle, but in a large height aerial work vehicle, it is difficult to meet the stress requirements, and the performance of the auxiliary frame 10 still needs to be improved.

[0041] In view of the above, the structure of the auxiliary frame 10 is further improved in the embodiment to improve the performance of the auxiliary frame 10 and the aerial work vehicle.

[0042] Specifically, as shown in Figure 5 The auxiliary frame 10 still includes a rotary support seat 13 and a longitudinal beam structure 12, and the longitudinal beam structure 12 includes a first partition plate 121, a right web plate 122, a second partition plate 123, a third partition plate 124, a middle web plate 125, a cover plate 126, a left web plate 127, and a bottom plate 128.

[0043] The longitudinal beam structure 12 is no longer a rectangular box structure, but the right web plate 122 and the left web plate 127 are respectively increased with a bending along the longitudinal direction of the auxiliary frame, and the right web plate 122, the left web plate 127, the cover plate 126, and the bottom plate 128 form a horn-shaped box, and the box is internally provided with the middle web plate 125, the first partition plate 121, the second partition plate 123, and the third partition plate 124.

[0044] In the above arrangement, the right web plate 122 and the left web plate 127 are no longer flat plates, but are respectively increased with a bending along the longitudinal direction of the auxiliary frame. Compared with the flat plates, the right web plate 122 and the left web plate 127 after bending have obviously strengthened rigidity; the right web plate 122, the left web plate 127, the cover plate 126, and the bottom plate 128 form a horn-shaped box, and compared with the rectangular box, the rigidity is better under the condition of the same cross-sectional area, so that the rigidity of the auxiliary frame 10 can be effectively improved.

[0045] Meanwhile, the longitudinal beam structure 12 is internally provided with the first partition plate 121, the second partition plate 123, the third partition plate 124, and the middle web plate 125, the third partition plate 124 is arranged in the longitudinal direction of the auxiliary frame 10, the first partition plate 121 and the second partition plate 123 are respectively arranged on both sides of the middle web plate 125, and the third partition plate 124, the middle web plate 125, the right web plate 122, and the left web plate 127 are connected together to form a "wood seed" cavity structure.

[0046] Compared with the rectangular cavity structure, the "wood seed" box structure has better strength, rigidity, and torsional capacity in the vertical plane and the horizontal plane, so that the strength, rigidity, and torsional capacity of the auxiliary frame 10 can be greatly improved.

[0047] It can be seen that the horn-shaped box structure of the longitudinal beam structure 12 and the internal "wooden son" cavity structure improve the strength and rigidity of the auxiliary frame 10 in the vertical plane and the horizontal plane, improve the torsional strength of the auxiliary frame 10, and improve the work safety and stability of the vehicle.

[0048] Through calculation, it is known that the position of the auxiliary frame 10 with the maximum stress is near the rotary support seat 13. The longitudinal beam structure 12 of the embodiment is welded in one body through the rotary support seat 13 to form a large box structure. Since the longitudinal center line of the rotary support seat 13 is offset to the right relative to the longitudinal center line of the longitudinal beam structure 12, the right box type of the rotary support seat 13 is correspondingly reduced and insufficient in strength.

[0049] Therefore, the embodiment further provides the first bent plate 15, the second bent plate 16, and the third bent plate 17 on the auxiliary frame 10.

[0050] Specifically, the first bent plate 15 wraps the right side of the rotary support seat 13 and forms a local box type with the longitudinal beam structure 12. To further strengthen the strength near the rotary support seat 13, the second bent plate 16 and the third bent plate 17 are welded with the rotary support seat 13 and the longitudinal beam structure 12 to form a double-layer box structure of the auxiliary frame 10 in the vertical plane.

[0051] Compared with the single box structure, the double-layer box structure and the local box structure of the embodiment can effectively improve the strength and rigidity of the auxiliary frame near the rotary support seat 13, and further improve the structural reliability of the auxiliary frame 10.

[0052] The above description is only the preferred embodiment of the present application, and it should be pointed out that for ordinary skilled in the art, without departing from the principles of the present application, a number of improvements and refinements can be made, and these improvements and refinements should be considered as the protection scope of the present application.

Claims

1. A large-scale aerial work platform sub-frame, characterized in that, The utility model relates to a kind of auxiliary frame of high-altitude working vehicle, including: First fixed leg box (11), longitudinal beam structure (12), rotary support seat (13), second fixed leg box (14); The first fixed leg box (11) and second fixed leg box (14) are respectively welded in longitudinal beam structure (12) both ends, and longitudinal center line is coincident with the longitudinal center line of longitudinal beam structure (12); Rotary support seat (13) is welded in longitudinal beam structure (12) close to second fixed leg box (14) side, and longitudinal beam structure (12) passes through rotary support seat (13) and is welded in an organic whole, form box type structure;The longitudinal center line of rotary support seat (13) is offset to right relative to the longitudinal center line of longitudinal beam structure (12); Longitudinal beam structure (12) includes: right web (122), cover plate (126), left web (127), bottom plate (128); Right web (122) and left web (127) have a bend along the auxiliary frame longitudinal direction respectively, and right web (122), cover plate (126), left web (127) and bottom plate (128) form horn mouth shape box, and first baffle (121), second baffle (123), third baffle (124) and middle web (125) are sequentially arranged in the box; First baffle (121) and second baffle (123) are arranged on the both sides of middle web (125) respectively, and third baffle (124), middle web (125), right web (122) and left web (127) are connected together, forming wooden son shape cavity structure; The auxiliary frame is further provided with first bent plate (15), second bent plate (16) and third bent plate (17); First bent plate (15) wraps rotary support seat (13) right side portion, and forms a local box type with longitudinal beam structure (12);Second bent plate (16) and third bent plate (17) are welded and connected with rotary support seat (13) and longitudinal beam structure (12), so that the auxiliary frame forms double-layer box type structure in vertical plane.

2. The large-scale overhead working vehicle auxiliary frame according to claim 1, characterized in that: Longitudinal beam structure (12) includes: third baffle (124) has multiple, and is arranged at intervals along the longitudinal direction of auxiliary frame, and separates the inside of box into multiple rectangular cavities.

3. The large-scale overhead working vehicle sub-frame according to claim 1, characterized in that: The auxiliary frame is used for connecting high-altitude working vehicle chassis and rotary table, for realizing the connection of chassis and superstructure, and the longitudinal center line of longitudinal beam structure (12) coincides with the longitudinal center line of high-altitude working vehicle chassis, and the longitudinal center line of rotary support seat (13) coincides with the longitudinal center line of high-altitude working vehicle superstructure rotary table.

4. The large-scale overhead working vehicle sub-frame according to claim 1, characterized in that: The longitudinal center line of rotary support seat (13) is offset to right relative to the longitudinal center line of longitudinal beam structure (12) by distance e: e=M1*L / (M1+M2) Wherein, M1 is the sum of the mass of high-altitude working vehicle secondary arm and crank arm, M2 is the sum of the mass of high-altitude working vehicle rotary table and primary arm, and L is the distance between the longitudinal center line of high-altitude working vehicle secondary arm and the longitudinal center line of primary arm.

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