Aircraft lifting appliance capable of steplessly adjusting mass center

Abstract

The invention belongs to the technical field of aircraft accessory structure design, and particularly relates to a stepless mass center adjusting aircraft lifting appliance which is composed of a main beam, a lifting belt, a safety mechanism, a gear and rack transmission mechanism, a rear lifting block, a gear limiting mechanism, a transfer beam, a front lifting block and a plurality of sets of roller mechanisms. Wherein the transfer beam is made of cold-bending inward-curled channel steel, the lifting belt is made of synthetic fiber and is woven on the main beam, the safety mechanism is fixed on the main beam, the gear and rack transmission mechanism is fixed on the side surfaces of the main beam and the transfer beam at the same time, and the roller mechanism is fixed on two outer curled edges of the main beam and rolls in a guide rail of the transfer beam. The rear lifting block and the front lifting block are both fixed to the bottom of the transfer beam, and the gear limiting mechanism is used for achieving limiting and fixing after mass center adjustment. Stepless mass center adjustment of the aircraft lifting appliance is achieved through the gear and rack transmission mechanism and the roller moving mechanism; fixing after the mass center is adjusted is achieved through the gear limiting mechanism, and safety protection under the condition that the hand is accidentally loosened when the mass center is adjusted is achieved through the safety mechanism. According to the aircraft lifting appliance, the purpose of accurately positioning the mass center of the aircraft can be finally achieved by roughly adjusting the mass center and accurately adjusting the mass center, so that the lifted aircraft is in a stable state.

Description

Technical Field

[0001] The invention belongs to the technical field of aircraft accessory structure design, and in particular relates to an aircraft hoist with stepless adjustment of the center of mass. Background Art

[0002] Currently, aircraft hoists are generally equipped with multiple holes. The center of mass of the aircraft lifting is adjusted by moving the lifting ring between different hole positions. Before lifting, the position of the lifting ring is generally adjusted to be directly above the center of mass mark of the aircraft.

[0003] Since it is impossible to adjust the lifting ring of the aircraft hoist to be directly above the aircraft's center of mass mark with the naked eye, and secondly, the aircraft hoist itself has mass, the combined center of mass is not directly above the aircraft's center of mass mark after lifting, and the aircraft hoist has a hole spacing that cannot steplessly adjust the lifting center of mass, and the center of mass adjustment must be performed when the aircraft hoist is not under stress, it is necessary to lift the aircraft repeatedly to adjust the aircraft to a relatively horizontal state, and the operation is more cumbersome. Summary of the invention

[0004] Purpose of the invention: The invention proposes an aircraft hoist with stepless adjustment of the center of mass, which can adjust the center of mass of the aircraft hoisting; and can achieve stepless adjustment of the hoisting center of mass.

[0005] Technical solution: An aircraft hoist with stepless adjustment of the center of mass, the hoist consists of a main beam, a lifting belt, a safety mechanism, a gear rack transmission mechanism, a rear lifting block, a gear limiting mechanism, a transfer beam, a front lifting block and multiple groups of roller mechanisms; wherein the transfer beam is a cold-bent inner-curled channel steel, the lifting belt material is synthetic fiber woven on the main beam, the safety mechanism is fixed on the main beam, the gear rack transmission mechanism is fixed to the sides of the main beam and the transfer beam at the same time, the roller mechanism is fixed to the two outer curling edges of the main beam and rolls in the guide rail of the transfer beam, the rear lifting block and the front lifting block are both fixed to the bottom of the transfer beam, and the gear limiting mechanism is used to achieve limited fixation after the center of mass is adjusted.

[0006] Furthermore, the rack and pinion transmission mechanism consists of a handwheel driving shaft, a fixed frame, a rack and a driving wheel. The rack is welded to the side of the main beam, the fixed frame is welded to the side of the transfer beam, the handwheel driving shaft passes through the fixed frame and is fixed to the fixed frame by a nut and a cotter pin, the driving wheel passes through the handwheel driving shaft and is fixed on the handwheel driving shaft by a key, and the rack is meshed with the driving wheel.

[0007] Furthermore, the gear limiting mechanism is composed of a gear limiting block, a guide cylinder, a first compression spring, a switching cylinder with a card slot and a knob. The guide cylinder is welded to the fixing frame, the switching cylinder with a card slot is welded to the guide cylinder, the first compression spring is sleeved on the gear limiting block, the gear limiting block passes through the guide cylinder, one end of which is clamped into the gear teeth of the driving wheel, and the other end is welded to the knob. A shallow card slot and a deep card slot are arranged on the switching cylinder with a card slot in a "cross" shape, and the knob is clamped in the shallow card slot or the deep card slot of the switching cylinder with a card slot.

[0008] Furthermore, the roller mechanism consists of a roller, an axle and two brackets. The brackets are welded to the outer curled edge of the main beam. The axle passes through the two brackets and is fixed to the brackets by cotter pins. The roller passes through the axle and is fixed to the axle by a deep groove ball bearing.

[0009] Furthermore, the safety mechanism is composed of a handle, a safety pin, a sleeve and a second compression spring. The sleeve is welded to the main beam, the second compression spring is sleeved on the safety pin, and the safety pin passes through the sleeve and is welded to the handle.

[0010] Furthermore, the transfer beam structure adopts cold-bent inner-curled channel steel, and a set of guide rails are welded on each inner curled edge for guiding the rolling of the rollers in the roller mechanism. Multiple sets of waist-shaped holes are evenly arranged in the length direction for limiting the safety pins in the safety mechanism.

[0011] Furthermore, the main beam is a cold-bent externally rolled channel steel.

[0012] Furthermore, the fixing method adopts welding fixing form.

[0013] Technical effect: The aircraft hoist can adjust the center of mass of the aircraft steplessly through the gear rack transmission mechanism and the roller moving mechanism; the center of mass can be fixed after adjustment through the gear limit mechanism, and the safety mechanism can be used to protect against accidental release during the adjustment of the center of mass. The aircraft hoist proposed by the present invention can achieve the purpose of accurately positioning the center of mass of the aircraft by roughly adjusting the center of mass and accurately adjusting the center of mass, so that the hoisted aircraft is in a stable state. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 The schematic diagram of the aircraft hoist for steplessly adjusting the center of mass;

[0015] Figure 2 It is the principle diagram of gear rack transmission and limit mechanism;

[0016] Figure 3 It is the principle diagram of roller moving mechanism and safety mechanism;

[0017] Figure 4 This is the structural diagram of the transfer beam;

[0018] Figure 5 This is a picture of a hoisted aircraft;

[0019] Among them, 1-main beam, 2-lifting belt, 3-safety mechanism, 4-gear rack transmission mechanism, 5-roller mechanism, 6-rear lifting block, 7-gear limiting mechanism, 8-transfer beam, 9-front lifting block, 10-driving shaft with handwheel, 11-fixed frame, 12-rack, 13-driving wheel, 14-gear limiting block, 15-guide cylinder, 16-first compression spring, 17-transfer cylinder with card slot, 18-knob, 19-bracket, 20-axle, 21-roller, 22-handle, 23-safety pin, 24-sleeve, 25-second compression spring. DETAILED DESCRIPTION

[0020] In order to more clearly illustrate the technical solution of the embodiment of the present invention, the present invention is described in detail below in conjunction with the drawings or specific implementation cases of the specification. It should be noted that some (but not all) of the disclosed examples are shown in the drawings. In fact, many different examples can be described and these examples should not be understood as being limited to the examples set forth herein. On the contrary, these examples are described so that the positive effects of the present invention are more reflected, and any parts not detailed in the text are regarded as known techniques or conventional technical means in the art.

[0021] See attached Figures 1 to 5 The present invention is composed of a main beam 1, a lifting belt 2, a safety mechanism 3, a gear rack transmission mechanism 4, a roller mechanism 5, a rear lifting block 6, a gear limit mechanism 7, a transfer beam 8, and a front lifting block 9, and its appearance is as follows Figure 1 shown.

[0022] Operation process of safety mechanism 3: lift the handle 22 to move the safety pin 23 upward, and the second compression spring 25 is in a compressed state. After releasing the handle 22, the safety pin 23 moves downward under the rebound force of the second compression spring 25 until the handle 22 contacts the sleeve.

[0023] The operation process of the gear rack transmission mechanism 4 and the roller mechanism 5 is as follows: the handwheel with the handwheel driving shaft 10 is rotated to drive the driving wheel 13 to rotate, and the main beam 1 and the transfer beam 8 are relatively moved along the axial direction through the engagement of the driving wheel 13 and the rack 12. The contact points for the relative movement of the main beam 1 and the transfer beam 8 are multiple sets of roller mechanisms 5. The friction is reduced by the rolling of multiple rollers 21 on the guide rails on the transfer beam, so that a single person can easily drive the relative movement of the main beam 1 and the transfer beam 8 by rotating the handwheel with the handwheel driving shaft 10.

[0024] Operation process of the gear limiting mechanism 7: pinch the knob 18 in the gear limiting mechanism 7 and rotate it, so that the knob 18 is inserted into the shallow groove in the adapter tube 17 with the groove, so that the gear limiting block 14 is away from the driving wheel 13, and the limiting of the gear rack transmission mechanism 4 is released; pinch the knob 18 and rotate it 90°, so that the knob 18 is inserted into the deep groove in the adapter tube 17 with the groove, so that the gear limiting block 14 is inserted into the gear teeth of the driving wheel 13, and the limiting of the gear rack transmission mechanism 4 is realized.

[0025] Coarse adjustment of the center of mass process: The gantry crane / crane hooks the lifting belt 2 of the aircraft lifting device, lifts the aircraft lifting device to the top of the aircraft, fixes the front and rear lifting interfaces of the aircraft on the front lifting block 9 and the rear lifting block 6 respectively, pinches the knob 18 in the gear limit mechanism 7 and rotates it, so that the knob 18 is inserted into the shallow groove in the adapter tube 17 with a groove, so that the gear limit block 14 is away from the driving wheel 13, releases the limit on the gear rack transmission mechanism 4, rotates the handwheel with the handwheel driving shaft 10, and moves the main beam 1 along the axial direction. During this period, if the safety pin 23 in the safety mechanism 3 is stuck When the waist-shaped hole of the transfer beam 8 causes the main beam 1 to be unable to move, lift the handle 22 in the safety mechanism 3 to disengage the safety pin 23 from the waist-shaped hole of the transfer beam 8, and continue to rotate the handwheel with the handwheel driving shaft 10 until the center of the lifting belt 2 and the mass center mark sprayed on the surface of the aircraft are on the same plumb line, then stop rotating the handwheel with the handwheel driving shaft 10, pinch the knob 18 in the gear limiting mechanism 7 and rotate it, so that the knob 18 is stuck in the deep groove of the transfer cylinder 17 with the groove, so that the gear limiting block 14 is stuck in the gear teeth of the driving wheel 13, so as to limit the gear rack transmission mechanism 4.

[0026] Precisely adjust the center of mass process: control the gantry crane / crane to slowly lift the aircraft, and observe the lifting horizontal state of the aircraft after it is suspended in the air. If the aircraft is tilted at a large angle, hold the handwheel with the handwheel driving shaft 10 with one hand, and pinch the knob 18 in the gear limit mechanism 7 with the other hand and rotate it to make the knob 18 snap into the shallow groove in the adapter tube 17 with the groove. After releasing the limit on the gear rack transmission mechanism 4, rotate the handwheel with the handwheel driving shaft 10 to make the adapter beam 8 move along the direction of the aircraft's head rise. During this period, if the safety pin 2 in the safety mechanism 3 When the main beam 1 cannot move due to the locking of the safety pin 23 into the waist hole of the transfer beam 8, lift the handle 22 in the safety mechanism 3 to disengage the safety pin 23 from the waist hole of the transfer beam 8, and continue to rotate the handwheel with the handwheel driving shaft 10 until the aircraft returns to a horizontal state, then stop rotating the handwheel with the handwheel driving shaft 10, pinch the knob 18 in the gear limiting mechanism 7 and rotate it, so that the knob 18 is locked into the deep groove of the adapter tube 17 with the groove, so that the gear limiting block 14 is locked into the gear teeth of the driving wheel 13, and the gear rack transmission mechanism 4 is limited. Figure 5 shown.

[0027] Safety protection process: When the center of mass is accurately adjusted, when the gear limit mechanism releases the gear limit, if the control of the handwheel with the handwheel driving shaft 10 is accidentally released, the aircraft will be lifted with a tilt angle, causing the adapter beam 8 to move along the axial direction, and the tilt angle of the aircraft will become larger and larger. When the adapter beam 8 moves to the point where the safety pin 23 in the safety mechanism 3 is stuck in the waist-shaped hole of the adapter beam 8, the movement of the adapter beam 8 is limited, thereby preventing the tilt angle of the aircraft from becoming larger and larger, thereby achieving safety protection of the aircraft.

[0028] The above specific implementation methods or cases are only used to explain the technical solutions of the present invention, and are not intended to limit the present application. Any parts not described in detail are deemed to be conventional technical means or common knowledge in the field. It can be understood by ordinary technicians in this field that: based on the design concept of the present application, the technical solutions recorded in the aforementioned implementation methods should be adaptively modified, or some or all of the technical features therein should be replaced by equivalents. These modifications, equivalent replacements, and adaptively improved technical solutions do not depart from the technical essence of the present invention and should all be covered within the protection scope of the present application.

Claims

1. An aircraft hoist with stepless adjustment of the center of mass, characterized in that: The lifting device is composed of a main beam (1), a lifting belt (2), a safety mechanism (3), a gear rack transmission mechanism (4), a rear lifting block (6), a gear limiting mechanism (7), a transfer beam (8), a front lifting block (9) and a plurality of roller mechanisms (5); wherein the transfer beam (8) is a cold-bent inner-curled channel steel, the lifting belt (2) is made of synthetic fiber and woven on the main beam (1), the safety mechanism (3) is fixed on the main beam (1), the gear rack transmission mechanism (4) is simultaneously fixed on the sides of the main beam (1) and the transfer beam (8), the roller mechanism (5) is fixed on the two outer curling edges of the main beam (1) and rolls in the guide rail of the transfer beam (8), the rear lifting block (6) and the front lifting block (9) are both fixed on the bottom of the transfer beam (8), and the gear limiting mechanism (7) is used to achieve limit fixation after the center of mass is adjusted.

2. The aircraft sling with stepless adjustment of center of mass as claimed in claim 1, characterized in that: The gear rack transmission mechanism (4) is composed of a handwheel driving shaft (10), a fixing frame (11), a rack (12) and a driving wheel (13); the rack (12) is welded to the side of the main beam (1); the fixing frame (11) is welded to the side of the transfer beam (8); the handwheel driving shaft (10) passes through the fixing frame (11) and is fixed to the fixing frame (11) by a nut and a cotter pin; the driving wheel (13) passes through the handwheel driving shaft (10) and is fixed to the handwheel driving shaft (10) by a key; the rack (12) is meshed with the driving wheel (13).

3. The aircraft sling with stepless adjustment of center of mass as claimed in claim 1, characterized in that: The gear limiting mechanism (7) is composed of a gear limiting block (14), a guide cylinder (15), a first compression spring (16), a switching cylinder with a clamping groove (17) and a handle (18). The guide cylinder (15) is welded to a fixing frame (11), the switching cylinder with a clamping groove (17) is welded to the guide cylinder (15), the first compression spring (16) is sleeved on the gear limiting block (14), the gear limiting block (14) passes through the guide cylinder (15), one end of the gear limiting block (14) is clamped on the gear teeth of the driving wheel (13), and the other end is welded to the handle (18). The switching cylinder with a clamping groove (17) is provided with a shallow clamping groove and a deep clamping groove in a "cross" shape, and the handle (18) is clamped on the shallow clamping groove or the deep clamping groove of the switching cylinder with a clamping groove (17).

4. The aircraft sling with stepless center of mass adjustment according to claim 1, characterized in that: The roller mechanism (5) is composed of a roller (21), a wheel axle (20) and two brackets (19), wherein the bracket (19) is welded to the outer curling edge of the main beam (1), the wheel axle (20) passes through the two brackets (19) and is fixed to the brackets (19) through a cotter pin, and the roller passes through the wheel axle (20) and is fixed to the wheel axle (20) through a deep groove ball bearing.

5. The aircraft sling with stepless center of mass adjustment according to claim 1, characterized in that: The safety mechanism (3) is composed of a handle (22), a safety pin (23), a sleeve (24) and a second compression spring (25); the sleeve (24) is welded to the main beam (1); the second compression spring (25) is sleeved on the safety pin (23); and the safety pin (23) passes through the sleeve (24) and is welded to the handle (22).

6. The aircraft sling with stepless adjustment of center of mass as claimed in claim 1, characterized in that: A set of guide rails are welded on the inner rolled edges of the transfer beam (8) structure for guiding the rolling of the roller (21) in the roller mechanism (5), and a plurality of sets of waist-shaped holes are evenly arranged in the length direction for limiting the safety pin (23) in the safety mechanism (3).

7. The aircraft sling with stepless adjustment of center of mass as claimed in claim 1, characterized in that: The main beam (1) is a cold-bent externally curled channel steel.

8. The aircraft sling with stepless center of mass adjustment according to claim 1, characterized in that: The main structure connection method is fixed by welding.

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