An aircraft weighing device

Abstract

The utility model discloses an airplane weighing device, including the downward extension of the lower installation cavity of the ground shaping, and the lifting mechanism is in the lower installation cavity of weighing device, the bottom fixed plate is fixed to the bottom surface of lower installation cavity, it's lifting mechanism simple structure, the transverse space is occupied little, make its lower installation cavity transverse space is occupied little, the convenient installation, and it can cover the upper portion of lower installation cavity through the cover plate when not detecting use, make the weighing device will not be pressed, and the two bending connecting plates of its upper installation can position the wheel of the landing gear of airplane and guarantee that it is in the center position weighing of weighing device, guarantee the accuracy of weighing.

Description

Technical fields:

[0001] This utility model relates to the field of aircraft manufacturing equipment technology, and more specifically to an aircraft weighing device. Background technology:

[0002] After assembly, general aviation aircraft need to be weighed. The weighing report is an important part of the aircraft delivery documentation. The center of gravity is calculated based on the weight of each landing gear, which is of great significance for the continued airworthiness of the aircraft and the load-bearing capacity of passengers and baggage. At this time, the general aviation aircraft needs to be weighed at the corresponding landing gear locations while keeping it level.

[0003] The traditional method of measurement involves using three hydraulic forklifts equipped with weighing functions. Multiple employees lift the aircraft and place each wheel onto one of the three forklifts for weighing. After weighing, the aircraft is then unloaded. This weighing process is problematic because the aircraft is heavy. Each weighing requires a significant amount of manpower, and improper operation can easily cause skidding, potentially leading to injury to personnel and the aircraft, posing a serious safety hazard.

[0004] Therefore, a universal aircraft attitude adjustment and weighing device, with Chinese patent authorization announcement number CN215865440U, includes a weighing device, a lifting platform, a transmission device, and a drive motor. The weighing device is mounted on the lifting platform, and the drive motor drives the lifting platform to rise and fall via the transmission device. The lifting platform, transmission device, and drive motor are installed in a recessed structure in the ground, allowing the weighing device to be flush with the ground. The operator can activate the drive motors of the three universal aircraft attitude adjustment and weighing devices separately, driving the corresponding lifting platforms to rise and fall, thereby adjusting the aircraft's attitude to a level position. This utility model simplifies the weighing and attitude adjustment of aircraft, eliminating the need for extensive manual handling of the aircraft and removing safety hazards in production.

[0005] However, because its transmission device extends laterally, its structure is complex and occupies too much lateral space, resulting in a large lateral area of ​​the depression in the ground. Therefore, it needs to be covered with a fourth steel plate. The fourth steel plate and the upper surface of the weighing device are covered, which is complex. Moreover, the upper surface of the weighing device is exposed. When external objects pass by, they will exert pressure on it, causing the weighing device to be crushed and making it easy to break.

[0006] Furthermore, the existing weighing devices lack a central positioning device on their upper surface, making it impossible to position the aircraft's landing gear wheels when they are moved. When the landing gear wheels are misaligned, it affects the accuracy of the weighing and can easily lead to deviations. Utility Model Content:

[0007] The purpose of this utility model is to overcome the shortcomings of the prior art and provide an aircraft weighing device. Its lifting mechanism has a simple structure and occupies little lateral space, which makes the lateral space occupied by its lower mounting cavity small and convenient for installation. Moreover, when not in use, the upper part of the lower mounting cavity can be covered by a cover plate to prevent the weighing device from being crushed. Furthermore, the two bent connecting plates installed on it can position the landing gear wheels of the aircraft to ensure that they are in the center position of the weighing device, thus ensuring the accuracy of weighing.

[0008] The solution of this utility model to the aforementioned technical problem is:

[0009] An aircraft weighing device includes a downwardly extending lower mounting cavity formed on the ground, in which the weighing device and a lifting mechanism are located, and a bottom fixing plate is fixed to the bottom surface of the lower mounting cavity.

[0010] The lifting mechanism includes four vertical lifting screws. The bottom of the vertical lifting screws is movably connected to the front and rear of the left and right sides of the bottom fixed plate through bearings. A support frame is fixed in the middle of the top surface of the bottom fixed plate. A lifting servo motor is fixed in the middle of the top surface of the top plate of the support frame. The bottom end of the output shaft of the lifting servo motor extends out of the bottom surface of the top plate of the support frame and is fixed with a drive gear. The drive gear meshes with a transmission gear fixed on the bottom outer wall of the vertical lifting screw.

[0011] A lifting screw sleeve is screwed onto the vertical lifting screw, and the top of the four lifting screw sleeves is fixed to the same lifting plate;

[0012] A weighing device is installed on the top surface of the lifting platform.

[0013] The support frame includes an upper plate extending forward and backward. The front and rear bottom surfaces of the upper plate are both formed with vertical plates extending downward. The bottom ends of the vertical plates are fixed to the top surfaces of the front and rear middle parts of the bottom fixing plate.

[0014] The weighing device includes a weighing sensor fixed in the middle of the top surface of the lifting plate. An upper horizontal support plate is fixed to the top sensing end of the weighing sensor. Two bent connecting plates are fixed in the middle of the top surface of the upper horizontal support plate. A detection slot is formed between the vertical plates of the two bent connecting plates.

[0015] The bending connecting plate includes a horizontal connecting plate portion, the end of which is formed with an upwardly bent vertical plate portion. The vertical plate portion and the horizontal connecting plate portion are at a 90° angle. The horizontal connecting plate portion is formed with multiple left-right extending waist-shaped adjustment slots. The screw portion of the fixing bolt is inserted into the corresponding waist-shaped adjustment slot and screwed into the corresponding screw hole formed on the top surface of the upper horizontal support plate. The bottom surface of the rotating part of the fixing bolt presses against the top surface of the horizontal connecting plate portion, and the bottom surface of the upper horizontal connecting plate portion presses against the top surface of the upper horizontal support plate.

[0016] A transversely extending sensing post is fixed on the lower outer wall of a lifting screw sleeve. A first proximity switch is fixed on the lower part of the inner wall of the corresponding side of the lower mounting cavity. A second proximity switch is fixed on the middle part of the inner wall of the corresponding side of the lower mounting cavity above the first proximity switch. The sensing post corresponds to the first proximity switch and the second proximity switch.

[0017] Elastic anti-collision blocks are fixed to the front and rear of the left and right sides of the upper horizontal support plate. The bottom surface of the elastic anti-collision block faces the top surface of the lifting plate, and there is a gap between the bottom surface of the elastic anti-collision block and the top surface of the lifting plate.

[0018] The upper part of the four side walls of the lower mounting cavity is formed with outwardly horizontally extending frame-shaped grooves. The four edges of the cover plate press against the bottom surface of the frame-shaped grooves, and the edges are inserted into the frame-shaped grooves and cover the top of the lower mounting cavity.

[0019] The bottom surface of the strip grooves on the left and right sides of the frame groove is formed with a lower groove at the front and rear. A locking block is nested in the lower groove. The bottom surface of the locking block is fixed to the bottom surface of the lower groove. A slot extending from front to back is formed in the middle of the top surface of the locking block. A threaded through hole is formed in the middle of one side wall of the slot. A ball plunger is threaded into the threaded through hole. The positioning bead part of the ball plunger extends out of the threaded through hole and is in the slot.

[0020] The cover plate has locking parts fixed to the front and rear of the bottom surface on both the left and right sides. The locking parts are inserted into the corresponding slots, and the positioning ball of the ball plunger is nested in the recess formed on the side wall of the corresponding locking part.

[0021] The outstanding effect of this utility model is:

[0022] Its lifting mechanism has a simple structure and occupies little lateral space, which makes the lateral space occupied by its lower mounting cavity small, making it easy to install. Moreover, when it is not in use, the upper part of the lower mounting cavity can be covered by a cover plate to prevent the weighing device from being crushed. In addition, the two bent connecting plates installed on it can position the landing gear wheels of the aircraft to ensure that they are in the center position of the weighing device, thus ensuring the accuracy of weighing. Attached image description:

[0023] Figure 1 This is a partial structural schematic diagram of the present invention;

[0024] Figure 2 yes Figure 1 A magnified view of a portion of the image;

[0025] Figure 3 This is a partial sectional view of the present invention from a top view.

[0026] Figure 4 This is a partial top view of the bent connecting plate. Detailed implementation method:

[0027] For example, see below. Figures 1 to 4 As shown, an aircraft weighing device includes a downwardly extending lower mounting cavity 100 formed on the ground, a weighing device 10 and a lifting mechanism 20 located in the lower mounting cavity 100, and a bottom fixing plate 11 fixed to the bottom surface of the lower mounting cavity 100.

[0028] The lifting mechanism 20 includes four vertical lifting screws 21. The bottom of the vertical lifting screws 21 is movably connected to the front and rear of the left and right sides of the bottom fixing plate 11 through bearings. A support frame 12 is fixed in the middle of the top surface of the bottom fixing plate 11. A lifting servo motor 13 is fixed in the middle of the top surface of the top plate of the support frame 12. The bottom end of the output shaft of the lifting servo motor 13 extends out of the bottom surface of the top plate of the support frame 12 and is fixed with a drive gear 14. The drive gear 14 meshes with a transmission gear 22 fixed on the bottom outer wall of the vertical lifting screws 21.

[0029] A lifting screw sleeve 23 is screwed onto the vertical lifting screw 21, and the top ends of the four lifting screw sleeves 23 are fixed to the same lifting plate 24;

[0030] A weighing device 10 is installed on the top surface of the lifting plate 24.

[0031] In this embodiment, the lifting servo motor 13 and other driving devices and the lifting mechanism 20 are installed above the bottom fixing plate 11, so as not to occupy too much horizontal space, so that the lower mounting cavity can be provided with a space that extends vertically, thereby reducing the occupation of horizontal space and making the opening at the top of the lower mounting cavity 100 smaller.

[0032] Furthermore, the support frame 12 includes an upper plate extending forward and backward. The front and rear bottom surfaces of the upper plate are both formed with vertical plates extending downward. The bottom ends of the vertical plates are fixed to the top surfaces of the front and rear middle parts of the bottom fixing plate 11 (which can be fixed by bolts or other means).

[0033] The weighing device 10 includes a weighing sensor 15 fixed in the middle of the top surface of the lifting plate 24. An upper horizontal support plate 16 is fixed to the top sensing end of the weighing sensor 15. Two bent connecting plates 17 are fixed in the middle of the top surface of the upper horizontal support plate 16. A detection slot 18 is formed between the vertical plate portions of the two bent connecting plates 17.

[0034] Bending pieces 80 are welded and fixed to the front ends of the vertical plates of the two bending connecting plates 17. The side bending portions of the two bending pieces 80 extending forward and backward are welded and fixed to the outer side walls of the corresponding vertical plates. The front middle connecting plate 81 presses against the front wall of the front horizontal plate of the two bending pieces 80. The left and right sides of the front middle connecting plate 81 are formed with elongated through slots 82. The screw portion of the front fixing bolt 83 is inserted into the corresponding elongated through slot 82 and screwed onto the corresponding front horizontal plate (two front fixing bolts 83 can be inserted into one elongated through slot 82 for fixing, but in this embodiment, one bolt is used). The center of the front middle connecting plate 81 is formed with a central screw-in through hole. The front positioning bolt 8 The screw part of 4 is screwed into the central screw through hole. Its front end extends out of the front wall of the front middle connecting plate 81 and is formed with a rotating part. Its rear end extends out of the rear wall of the front middle connecting plate 81 and is fixed with a connecting plate. A nylon positioning block 85 is fixed on the rear end face of the connecting plate. A second compression spring is inserted into the screw part of the front positioning bolt 84. One end of the second compression spring is applied to the connecting plate and the other end is applied to the rear end face of the front middle connecting plate 81. By rotating the front positioning bolt 84, the front and rear positions of the nylon positioning block 85 can be changed so that it is in the front part of the middle, so that the front end of the landing gear wheel under the nose of the aircraft is close to the rear end face of the nylon positioning block 85, thus achieving positioning.

[0035] During testing, the landing gear wheels of the aircraft can be inserted into the testing slots 18, with their front ends resting against the rear end face of the corresponding nylon positioning blocks 85. This positions the landing gear wheels in the middle of the upper horizontal support plate 16 and directly above the load cell 15, resulting in more accurate and precise testing. Since there are three weighing devices 10, only the nylon positioning blocks 85 and other components need to be installed at the weighing device 10 below the nose of the aircraft. Because the installation positions of the three upper horizontal support plates 16 in this embodiment are designed and installed specifically for this type of general aviation aircraft requiring testing, only the position of one wheel needs to be positioned; the positions of the other two wheels are also fixed.

[0036] Furthermore, the bending connecting plate 17 includes a horizontal connecting plate portion 171, the end of which is formed with an upwardly bent vertical plate portion. The vertical plate portion and the horizontal connecting plate portion 171 are at a 90° angle. The horizontal connecting plate portion 171 is formed with a plurality of left-right extending waist-shaped adjustment slots 172. The screw portion of the fixing bolt 173 is inserted into the corresponding waist-shaped adjustment slot 172 and screwed into the corresponding screw hole formed on the top surface of the upper horizontal support plate 16. The bottom surface of the rotating part of the fixing bolt 173 presses against the top surface of the horizontal connecting plate portion 171, and the bottom surface of the upper horizontal connecting plate portion 171 presses against the top surface of the upper horizontal support plate 16.

[0037] This structure allows the bent connecting plate 17 to be moved laterally by loosening the fixing bolt 173, making its position easy to adjust. After adjustment, the fixing bolt 173 can be tightened (during installation, washers can be inserted into the threaded part of the fixing bolt 173 to improve the fixing firmness and reduce the chance of loosening).

[0038] A transversely extending sensing post 231 is fixed on the lower outer wall of a lifting screw sleeve 23. A first proximity switch 1 is fixed on the lower part of the inner wall of the corresponding side of the lower mounting cavity 100. A second proximity switch 2 is fixed on the middle part of the inner wall of the corresponding side of the lower mounting cavity 100 above the first proximity switch 1. The sensing post 231 corresponds to the first proximity switch 1 and the second proximity switch 2.

[0039] Elastic anti-collision blocks 3 are fixed to the front and rear of the left and right sides of the upper horizontal support plate 16. The bottom surface of the elastic anti-collision block 3 faces the top surface of the lifting plate 24, and there is a gap between the bottom surface of the elastic anti-collision block 3 and the top surface of the lifting plate 24.

[0040] The upper part of the four side walls of the lower mounting cavity 100 is formed with outwardly horizontally extending frame-shaped grooves 101. The four sides of the cover plate 30 press against the bottom surface of the frame-shaped grooves 101, and its sides are inserted into the frame-shaped grooves 101 and cover the top of the lower mounting cavity 100.

[0041] The bottom surface of the strip grooves on the left and right sides of the frame groove 101 is formed with a lower groove 102 at the front and rear. A locking block 103 is nested in the lower groove 102. The bottom surface of the locking block 103 is fixed to the bottom surface of the lower groove 102. A slot extending from front to back is formed in the middle of the top surface of the locking block 103. A screw-in through hole is formed in the middle of one side wall of the slot. A ball plunger 104 is screwed into the screw-in through hole. The positioning bead part of the ball plunger 104 extends out of the screw-in through hole and is in the slot.

[0042] The cover plate 30 has a locking part 31 fixed to the front and rear of the bottom surface on both the left and right sides. The locking part 31 is inserted into the corresponding slot, and the positioning bead of the ball plunger 104 is nested in the recess formed on the side wall of the corresponding locking part 31.

[0043] An LCD display is fixed to one side of the top surface of the upper horizontal support plate 16 of the weighing sensor 15.

[0044] In this embodiment, a control host is fixed on the side wall of the lower mounting cavity 100. All electrical components are electrically connected to the control host via electrical connection lines. At the same time, an external power connection line extends from one side wall of the lower mounting cavity 100 and is electrically connected to the control host to provide power to the control host. A wireless module or Bluetooth module is also electrically connected to the control motherboard of the control host, enabling it to wirelessly connect with an external wireless controller. Of course, before control, the cover plate 30 needs to be opened. The structure and principle of the control host are consistent with existing known structures, and will not be described in detail here.

[0045] In this embodiment, when not in use, the weighing device 10 is located in the lower mounting cavity 100, and the bent connecting plate 17 does not extend beyond the top of the lower mounting cavity 100. At this time, the lower mounting cavity 100 is covered by the cover plate 30, and the locking part 31 is inserted into the corresponding slot. The positioning bead of the ball plunger 104 is nested in the recess formed on the side wall of the corresponding locking part 31 to achieve fixation. The top surface of the cover plate 30 is flush with the ground. At this time, external objects passing through the cover plate 30 will not exert pressure on the weighing device 10, thus providing a protective effect.

[0046] Meanwhile, the top surface of the cover plate 30 has downward-extending grooves on the left and right sides, which make it easy to hook fingers in and lift the cover plate 30 for disassembly.

[0047] In this embodiment, during testing, the cover plate 30 is first opened and placed on the ground away from the lower mounting cavity 100. In this embodiment, three covers plate 30 are installed on the ground.

[0048] Then, by pressing the corresponding control button on the controller, the corresponding lifting servo motor 13 is activated, thereby realizing the lifting and lowering of the weighing device 10. During operation, when the sensing column 231 is sensed by the first proximity switch 1, it means that it has lowered to the bottom and can no longer lower. When it is sensed by the second proximity switch 2, it means that it has risen to the top and can no longer rise. The lifting and lowering of the weighing device 10 is limited by the first proximity switch 1 and the second proximity switch 2.

[0049] The upper horizontal support plate 16 is raised to be level with the top surface of the ground. Then, the aircraft is manually pushed so that the wheels of the corresponding landing gear are inserted into the corresponding detection slots 18, and their bottom surfaces press against the top surface of the upper horizontal support plate 16, so that the detection position is in the center position, making the detection value more accurate and precise. At this time, the weight can be sensed by three weighing sensors 15. The weighing sensors 15 are electrically connected to the control circuit board in the LCD display of the upper horizontal support plate 16 through electrical connection wires, and the detection data can be displayed on the LCD display.

[0050] Meanwhile, the weighing sensor 15 is electrically connected to the control host via an electrical connection cable. The control host sends the detection signal to the controller, which is equipped with a display screen, and the value is also displayed on the display screen, thus obtaining the detection value.

[0051] The above description is only a preferred embodiment of the present utility model. 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 utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. An aircraft weighing device comprising a downwardly extending, below-mount cavity (100) formed in the ground, the weighing device (10) and a lifting mechanism (20) being located in the below-mount cavity (100), characterised in that: A bottom fixing plate (11) is fixed to the bottom surface of the lower mounting cavity (100). The lifting mechanism (20) includes four vertical lifting screws (21). The bottom of the vertical lifting screws (21) is movably connected to the front and rear of the left and right sides of the bottom fixing plate (11) through bearings. A support frame (12) is fixed in the middle of the top surface of the bottom fixing plate (11). A lifting servo motor (13) is fixed in the middle of the top surface of the top plate of the support frame (12). The bottom end of the output shaft of the lifting servo motor (13) extends out of the bottom surface of the top plate of the support frame (12) and is fixed with a drive gear (14). The drive gear (14) meshes with the transmission gear (22) fixed on the bottom outer wall of the vertical lifting screws (21). A lifting screw sleeve (23) is screwed onto the vertical lifting screw (21), and the top of the four lifting screw sleeves (23) is fixed to the same lifting plate (24). A weighing device (10) is installed on the top surface of the lifting plate (24).

2. An aircraft weighing apparatus according to claim 1, wherein: The weighing device (10) includes a weighing sensor (15) fixed in the middle of the top surface of the lifting plate (24). The top sensing end of the weighing sensor (15) is fixed with an upper horizontal support plate (16). Two bent connecting plates (17) are fixed in the middle of the top surface of the upper horizontal support plate (16). A detection slot (18) is formed between the vertical plate portions of the two bent connecting plates (17).

3. The aircraft weighing device according to claim 2, characterized in that: The bending connecting plate (17) includes a horizontal connecting plate part (171). The end of the horizontal connecting plate part (171) is formed with a vertical plate part that bends upward. The vertical plate part and the horizontal connecting plate part (171) are at a 90° angle. The horizontal connecting plate part (171) is formed with a plurality of waist-shaped adjustment slots (172) that extend left and right. The screw part of the fixing bolt (173) is inserted into the corresponding waist-shaped adjustment slot (172) and screwed into the corresponding screw hole formed on the top surface of the upper horizontal support plate (16). The bottom surface of the rotating part of the fixing bolt (173) presses against the top surface of the horizontal connecting plate part (171), and the bottom surface of the upper horizontal connecting plate part (171) presses against the top surface of the upper horizontal support plate (16).

4. The aircraft weighing device according to claim 1, characterized in that: A transversely extending sensing post (231) is fixed on the lower outer wall of a lifting screw sleeve (23). A first proximity switch (1) is fixed on the lower part of the inner wall of the corresponding side of the lower mounting cavity (100). A second proximity switch (2) is fixed on the middle part of the inner wall of the corresponding side of the lower mounting cavity (100) above the first proximity switch (1). The sensing post (231) corresponds to the first proximity switch (1) and the second proximity switch (2).

5. The aircraft weighing device according to claim 1, characterized in that: The upper part of the four side walls of the lower mounting cavity (100) is formed with outwardly horizontally extending frame grooves (101), and the four sides of the cover plate (30) press against the bottom surface of the frame groove (101), with its sides inserted into the frame groove (101) and covering the top of the lower mounting cavity (100).

6. The aircraft weighing device according to claim 5, characterized in that: The bottom surface of the strip grooves on the left and right sides of the frame groove (101) is formed with a lower groove (102) at the front and rear. A locking block (103) is nested in the lower groove (102). The bottom surface of the locking block (103) is fixed on the bottom surface of the lower groove (102). A slot extending from front to back is formed in the middle of the top surface of the locking block (103). A screw-in through hole is formed in the middle of one side wall of the slot. A ball plunger (104) is screwed into the screw-in through hole. The positioning bead part of the ball plunger (104) extends out of the screw-in through hole and is in the slot. The cover plate (30) has a locking part (31) fixed on the front and rear of the bottom surface on both sides. The locking part (31) is inserted into the corresponding slot. The positioning bead of the ball head plunger (104) is nested in the recess formed on the side wall of the corresponding locking part (31).

Images