A helicopter landing gear fixing device

Abstract

This invention provides a helicopter landing gear fixing device, relating to the field of support machine fixing technology. The device includes at least one locking device for locking the landing gear support tube. The locking device includes: a clamp base for fixing to the helicopter transport vehicle; and a clamping member, one end of which is rotatably connected to one side wall of the clamp base. Both the clamping surface of the clamping member and the top surface of the clamp base have clamping grooves. When the two clamping grooves are combined, they form a clamping cavity for clamping the support tube. The other end of the clamping member can be engaged with the other side wall of the clamp base. This invention has a simple structure, clamps and fixes the landing gear without tools, is simple and quick to operate, and ensures reliability and safety through a purely mechanical structure.

Description

Technical Field

[0001] This invention belongs to the field of support machine fixing technology, and more specifically, relates to a helicopter landing gear fixing device. Background Technology

[0002] Small skid-mounted helicopters are mainly transported on the ground using box-type cabins or flatbed trailers. Once the skid-mounted helicopter is towed to the designated location, the landing gear of the skid-mounted helicopter needs to be secured to the landing gear transport vehicle to ensure the stability of the helicopter during transport.

[0003] Currently, the existing methods for securing skid-mounted helicopters include: using a fixing strap, which has poor positioning and makes the skid-mounted landing gear prone to shifting; and using a special bracket for locking, which is costly, involves cumbersome equipment, and is inconvenient to operate, thus hindering the improvement of helicopter landing gear securing efficiency. Summary of the Invention

[0004] The purpose of this invention is to provide a helicopter landing gear fixing device to address the shortcomings of existing technologies. This device solves the problems mentioned in the background art, such as poor positioning and easy movement of skid-type landing gear when fixed with fixing straps. It also solves the problems of high cost, cumbersome equipment, and inconvenient operation when using special brackets for locking and fixing skid-type helicopters, which are not conducive to improving the fixing efficiency of helicopter landing gear.

[0005] To achieve the above objectives, the present invention provides a helicopter landing gear fixing device, which includes at least one locking device for locking the landing gear support tube, the locking device comprising:

[0006] A clamp base for securing to a helicopter transport vehicle;

[0007] The clamping member has one end rotatably connected to one side wall of the clamp base. Both the clamping surface of the clamping member and the top surface of the clamp base are provided with clamping grooves. When the two clamping grooves are combined, they can form a clamping cavity for clamping the support tube. The other end of the clamping member can be engaged with the other side wall of the clamp base.

[0008] Preferably, the locking device further includes:

[0009] A snap fastener is fixed to the other side wall of the fixture base;

[0010] An operating mechanism is connected to the other end of the pressure-holding member;

[0011] A chuck is connected to the operating end of the operating mechanism, and the operating mechanism can operate the chuck to engage with the latch.

[0012] Preferably, the operating mechanism includes:

[0013] A cylinder, the outer wall of which is fixed to the other end of the pressure-holding member;

[0014] A locking shaft is rotatably connected inside the cylinder, with both ends of the locking shaft extending out from both sides of the cylinder, and the claw is integrally formed and connected to the end of the locking shaft near the buckle;

[0015] A stop plate, one end of which is rotatably connected to the other end of the locking shaft.

[0016] Preferably, the other end of the locking shaft is provided with an axial groove, one end of the stop plate is rotatably connected in the axial groove, and when the pawl is engaged with the buckle, the stop plate is in a horizontal state and the stop plate rotates to the same side as the pawl.

[0017] Preferably, the buckle includes a support portion, one end of which is fixed to the other side wall of the clamp base, and the other end of which extends to both sides to form a snap-fit ​​portion.

[0018] Preferably, the claw includes two claw bodies, both of which are arc-shaped, and the concave sides of the two arc-shaped claw bodies can respectively engage with the lower sides of the two engaging portions.

[0019] Preferably, the stop plate is provided with an adjusting nut, and the adjusting nut is threadedly connected to an adjusting screw, which can pass through the adjusting nut and rest against the landing gear transport carrier.

[0020] Preferably, the locking shaft has a through hole for the pry bar to pass through.

[0021] Preferably, the clamping cavity is cylindrical.

[0022] Preferably, the number of locking devices is four, of which two locking devices are used to lock one side support tube of the landing gear, and the other two locking devices are used to lock the other side support tube of the landing gear.

[0023] This invention provides a helicopter landing gear fixing device, the advantages of which are:

[0024] The clamp base of the locking device is fixed to the landing gear transport carrier. One end of the clamping member is rotatably connected to one side wall of the clamp base. When fixing the helicopter landing gear, the clamping member is flipped open, and the landing gear support tube is placed in the clamping groove of the clamp base. Then, the clamping groove of the clamping member is placed over the support tube, at which point the support tube is positioned in the clamping cavity. Finally, the other end of the clamping member is snapped onto the other side wall of the clamp base to complete the clamping of the support tube, thereby fixing the landing gear to the landing gear transport carrier. This invention has a simple structure, can clamp and fix the landing gear without tools, is simple and quick to operate, and ensures reliability and safety by using a purely mechanical structure.

[0025] Other features and advantages of the present invention will be described in detail in the following detailed description section. Attached Figure Description

[0026] The above and other objects, features and advantages of the present invention will become more apparent from the more detailed description of exemplary embodiments of the invention in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments of the invention.

[0027] Figure 1 A schematic diagram of the structure of a helicopter landing gear fixing device in the open state according to an embodiment of the present invention is shown;

[0028] Figure 2 A schematic diagram of the structure of a helicopter landing gear fixing device in the clamping state according to an embodiment of the present invention is shown;

[0029] Figure 3 An exploded structural diagram of a locking device for a helicopter landing gear fixing device according to an embodiment of the present invention is shown.

[0030] Figure 4 A schematic diagram of a locking shaft structure for a helicopter landing gear fixing device according to an embodiment of the present invention is shown;

[0031] Figure 5 A schematic diagram of the clamping member structure of a helicopter landing gear fixing device according to an embodiment of the present invention is shown;

[0032] Figure 6 A schematic diagram of a clamp base component of a helicopter landing gear fixing device according to an embodiment of the present invention is shown;

[0033] Figure 7 A schematic diagram of a stop plate structure for a helicopter landing gear fixing device according to an embodiment of the present invention is shown;

[0034] Figure 8A schematic diagram of a helicopter landing gear fixing device according to an embodiment of the present invention is shown.

[0035] Explanation of reference numerals in the attached figures:

[0036] 1. Locking device; 2. Landing gear; 3. Clamp base; 4. Holding member; 5. Clamping groove; 6. Buckle; 7. Claw; 8. Cylinder; 9. Locking shaft; 10. Axial groove; 11. Stop plate; 12. Adjusting nut; 13. Adjusting screw; 14. Through hole; 15. Chamfer. Detailed Implementation

[0037] Preferred embodiments of the invention will now be described in more detail. While preferred embodiments of the invention are described below, it should be understood that the invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that the invention will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

[0038] like Figure 1 , Figure 2 , Figure 3 and Figure 8 As shown, the present invention provides a helicopter landing gear fixing device, which includes at least one locking device for locking the landing gear support tube. The locking device includes:

[0039] The clamp base is used to secure the device to the helicopter transport vehicle.

[0040] The clamping member has one end rotatably connected to one side wall of the clamp base. Both the clamping surface of the clamping member and the top surface of the clamp base are provided with clamping grooves. When the two clamping grooves are combined, they can form a clamping cavity for clamping the support tube. The other end of the clamping member can be engaged with the other side wall of the clamp base.

[0041] Specifically, to address the issues of poor positioning and easy movement of the skid landing gear when using a fixed strap for fixing, and the high cost, cumbersome equipment, and inconvenient operation associated with using a dedicated bracket for locking and fixing the skid landing gear, which hinders the improvement of landing gear fixing efficiency, this invention provides a helicopter landing gear fixing device. The clamping component of this locking device can be a clamp jaw, which is made of high-strength 1Cr13 stainless steel and has a hardness of 159-200 HBW after tempering. The clamp base 3 is also made of high-strength 1Cr13 stainless steel and has a hardness of 159-200 HBW after tempering. The clamp base 3 of the locking device is fixedly connected to the landing gear transport carrier. One end of the clamping member 4 is rotatably connected to one side wall of the clamp base 3. When fixing the landing gear 2 of the helicopter, the clamping member 4 is flipped open, and the support tube of the landing gear 2 is placed in the clamping groove 5 of the clamp base 3. Then, the clamping groove 5 of the clamping member 4 is covered on the support tube. At this time, the support tube will be set in the clamping cavity. Finally, the other end of the clamping member 4 is snapped onto the other side wall of the clamp base 3 to complete the clamping of the support tube, so that the landing gear 2 is fixed on the landing gear transport carrier. The present invention has a simple structure, can clamp and fix the landing gear 2 without tools, and is simple and quick to operate. Moreover, the pure mechanical structure ensures reliability and safety.

[0042] like Figure 5 and Figure 6 As shown, preferably, the clamp base has two opposing first pin holes on one side wall, and the clamping member 4 has two opposing second pin holes at one end. The two first pin holes and the two second pin holes are staggered and connected to each other. One end of the pin passes through the first pin hole and the second pin hole in sequence and is inserted with a cotter pin.

[0043] Specifically, it is used to enable one end of the holding member to rotate along one side wall of the fixture base.

[0044] Preferably, the four corners of the clamp base 3 are provided with first through holes, and four first locking screws pass through the four first through holes and are threaded onto the landing gear transport carrier.

[0045] Specifically, it serves to fix the fixture base 3.

[0046] Preferably, the locking device further includes:

[0047] The buckle is fixed to the other side wall of the fixture base;

[0048] The operating mechanism is connected to the other end of the pressure-holding member;

[0049] The chuck is connected to the operating end of the operating mechanism, and the operating mechanism can operate the chuck to engage with the latch.

[0050] Specifically, the operating mechanism enables the claw 7 to engage with the buckle 6, thereby clamping the support tube and fixing the landing gear 2 to the helicopter transport vehicle.

[0051] like Figure 1-7 As shown, preferably, the operating mechanism includes:

[0052] A cylinder, the outer wall of which is fixed to the other end of the pressure holder;

[0053] The locking shaft is rotatably connected inside the cylinder, with both ends of the locking shaft extending out from both sides of the cylinder. The pawl is integrally formed and connected to the end of the locking shaft near the latch.

[0054] A stop plate, one end of which is rotatably connected to the other end of the locking shaft.

[0055] The other end of the locking shaft is provided with an axial groove. One end of the stop plate is rotatably connected in the axial groove. When the pawl is engaged with the buckle, the stop plate is in a horizontal state and the stop plate rotates to the same side as the pawl.

[0056] The locking shaft has a through hole for the pry bar to pass through;

[0057] The stop plate is equipped with an adjusting nut, which is threaded with an adjusting screw. The adjusting screw can pass through the adjusting nut and rest against the landing gear transport vehicle.

[0058] Specifically, the locking shaft 9 is made of high-strength 1Cr13 stainless steel, and after tempering, its hardness is 159-200 HBW. The stop plate 5 is made of 65Mn material, and after tempering, its hardness is 42-47 HRC. When fixing the landing gear 2 of the helicopter, the support tube of the landing gear 2 is placed between the clamp jaw 4 and the clamp base 3. A torque is applied to the locking shaft 9 by using a pry bar, which drives the pawl 7 of the locking shaft 9 to clamp the buckle 6 of the clamp base 3, thus clamping the landing gear 2 of the helicopter. Then, the stop plate 11 is rotated perpendicular to the locking shaft 9 to prevent the locking shaft 9 from loosening under force. The middle part of the stop plate 5 is then brought into contact with the helicopter transport vehicle. The adjusting screw is screwed in, and the tension of the stop plate is adjusted by turning it in an appropriate number of times.

[0059] The above process is the operation process of the locking device 1 in the fixed clamping state. Similarly, the operation process of the locking device in the unlocking and opening state can be performed by reversing the operation process.

[0060] Preferably, the stop is an elastic stop.

[0061] Specifically, on the one hand, it facilitates good operability when fixed, and on the other hand, it ensures that after locking, the holding part 4 maintains downward pressure and the claw will not unlock automatically.

[0062] Preferably, a retaining ring is inserted into a groove on the locking shaft between the cylinder 8 and the stop plate 5, with the groove near one end of the cylinder 8.

[0063] Specifically, to prevent the locking shaft 9 from moving.

[0064] Preferably, a second through hole is provided at one end of the stop plate at the same vertical position as the axial groove, and a second locking screw passes through the second through hole and is threadedly connected to the self-locking nut.

[0065] Specifically, it is used to make one end of the stop plate 11 rotate.

[0066] like Figure 5 and Figure 6 As shown, preferably, the buckle includes a support portion, one end of which is fixed to the other side wall of the clamp base, and the other end of the support portion extends to both sides to form a snap-fit ​​portion.

[0067] The chuck consists of two claw bodies, both of which are arc-shaped. The concave sides of the arc-shaped claw bodies can respectively engage with the lower sides of the two engaging parts.

[0068] Specifically, when torque is applied to the locking shaft 9 by the pry bar, the locking shaft 9 can drive the concave sides of the two arc-shaped claws to engage with the lower sides of the two engaging parts respectively.

[0069] like Figure 4 As shown, preferably, the lower side of the snap-fit ​​part is an arc-shaped surface, and the corners of the two claws that are close to each other are chamfered.

[0070] Specifically, the 15-degree chamfer makes it easier for the two claws to move to both sides of the buckle's support.

[0071] Preferably, the clamping cavity is cylindrical.

[0072] Specifically, the cylindrical cavity is suitable for the support tube of landing gear with a circular cross-section. The design shape and size of the clamping cavity can be adjusted according to the different shapes of the support tube of the landing gear 2 being fixed, so as to meet the needs of different products, which expands the applicability of the equipment.

[0073] like Figure 8 As shown, preferably, the number of locking devices is four, of which two locking devices are used to lock one side support tube of the landing gear and the other two locking devices are used to lock the other side support tube of the landing gear.

[0074] Specifically, each locking device 1, when clamped, can fix the landing gear in two directions. The two locking devices 1 on the same side, through the limiting constraint of the connecting sleeve connecting the two support tubes on the landing gear 2, can fix the landing gear 2 in a third direction. Therefore, the four locking pivots ensure the stability of the helicopter during transportation.

[0075] In summary, the present invention provides a helicopter landing gear fixing device. When fixing the helicopter landing gear 2, the support tube of the landing gear 2 is placed between the clamp jaw 4 and the clamp base 3. A torque is applied to the locking shaft 9 by a pry bar, which drives the pawl 7 of the locking shaft 9 to clamp the buckle 6 of the clamp base 3, thus clamping the helicopter landing gear 2. Then, the stop plate 11 is rotated perpendicular to the locking shaft 9 to prevent the locking shaft 9 from loosening under force. The middle part of the stop plate 5 is then brought into contact with the helicopter transport carrier. The adjusting screw is screwed in, and the tension of the stop plate is adjusted by turning it in an appropriate number of times.

[0076] The above process is the operation process of the locking device 1 in the fixed clamping state. Similarly, the operation process of the locking device in the unlocking and opening state is the reverse operation process.

[0077] When there are four locking devices, each locking device 1 can fix the landing gear in two directions when clamped. The two locking devices 1 on the same side can fix the landing gear 2 in a third direction through the limiting constraint of the connecting sleeve connecting the two support tubes on the landing gear 2. Therefore, the four locking pivots ensure the stability of the helicopter during transportation. The present invention has a simple structure, can clamp and fix the landing gear 2 without tools, and is simple and quick to operate. Furthermore, the pure mechanical structure ensures reliability and safety.

[0078] When a transport helicopter experiences significant vertical sway and longitudinal acceleration overload while traversing complex road conditions, the stop plate 11 can effectively prevent the clamping structure from loosening due to vertical sway. At the moment of overload, the stop plate 11 undergoes elastic deformation, weakening the helicopter's kinetic energy to prevent the helicopter structure and onboard equipment from bearing the full overload.

[0079] The various embodiments of the present invention have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A helicopter landing gear securing device, characterised in that, The device comprises at least one locking device for locking the support tube of the landing gear, the locking device comprising: a clamp base for being fixed on the helicopter transport carrier; a pressing piece, one end of which is rotatably connected to the edge wall of the clamp base, and the pressing surface of the pressing piece and the top surface of the clamp base are both provided with clamping grooves, and the two clamping grooves can form a clamping cavity for clamping the support tube when combined, and the other end of the pressing piece can be clamped on the other edge wall of the clamp base; the locking device further comprises: a buckle fixed on the other edge wall of the clamp base; an operating mechanism connected to the other end of the pressing piece; a pawl connected to the operating end of the operating mechanism, and the operating mechanism can operate the pawl to be clamped on the buckle; the operating mechanism comprises: a cylinder, the outer wall of which is fixed on the other end of the pressing piece; a locking shaft rotatably connected to the inside of the cylinder, both ends of the locking shaft extending out of both sides of the cylinder, and the pawl is integrally connected to one end of the locking shaft close to the buckle; a stop piece, one end of which is rotatably connected to the other end of the locking shaft; the buckle comprises a support part, one end of which is fixed on the other edge wall of the clamp base, and the other end of the support part extends to both sides to form a clamping part.

2. A helicopter landing gear retaining device according to claim 1, characterised in that the other end of the locking shaft is provided with an axial groove, one end of the stop piece is rotatably connected in the axial groove, and when the pawl is clamped on the buckle, the stop piece is in a horizontal state, and the stop piece is rotated to the same side as the pawl.

3. A helicopter landing gear securing device according to claim 1, wherein the pawl comprises two claw bodies, both of which are arc-shaped, and the concave sides of the two arc-shaped claw bodies can be clamped on the lower sides of the two clamping parts.

4. A helicopter landing gear retaining device according to claim 1, wherein an adjusting nut is provided on the stop piece, the adjusting nut is threadedly connected with an adjusting screw, and the adjusting screw can be in abutment with the landing gear transport carrier through the adjusting nut.

5. A helicopter landing gear securing device according to claim 1, wherein a through hole is provided on the locking shaft, and the through hole is used for passing through a crowbar.

6. A helicopter landing gear retaining device according to claim 1, wherein the number of the locking devices is four, two of which are used for locking the support tube on one side of the landing gear, and the other two are used for locking the support tube on the other side of the landing gear.

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