Single-shaft double-wheel type wheel holding mechanism and aircraft tractor

Abstract

The utility model relates to the technical field of aircraft traction, in particular to a single-shaft double-wheel type wheel holding mechanism and an aircraft tractor. According to the wheel holding mechanism, a wheel holding space is defined by a front wheel holding assembly, a bearing plate and a rear wheel holding assembly, and the rear wheel holding assembly is slidably arranged in the closed end of a mounting groove and is close to or far away from the front wheel holding assembly, so that the size of the wheel holding space is adjustable, and the requirement for holding operation of aircraft wheel sets of different sizes is met; the bearing plate can assist in bearing part of the weight of the aircraft wheel set, the bearing of the front wheel holding assembly and the rear wheel holding assembly on the aircraft wheel set is reduced, and the front wheel holding assembly and the rear wheel holding assembly are prevented from being crushed. The aircraft tractor comprises the wheel holding mechanism, so that holding traction operation of single-shaft double-wheel wheel sets of different sizes can be realized, and overall traction of an aircraft can be realized.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of aircraft traction, and specifically relates to a single-shaft double-wheel type wheel-holding mechanism and aircraft tractor. BACKGROUND

[0002] The wheel-holding mechanism is indispensable in the process of aircraft traction. The existing wheel-holding mechanism is mostly based on a single aircraft wheel type as the research object, and the wheel-holding space surrounded by the front wheel-holding assembly and the rear wheel-holding assembly is of fixed size, which cannot meet the traction of aircraft wheel sets of different sizes of more aircraft types. In addition, if the wheel-holding mechanism only uses the front wheel-holding assembly and the rear wheel-holding assembly to complete the wheel-holding and load-bearing of the aircraft wheel set, the front wheel-holding assembly and the rear wheel-holding assembly are likely to be crushed. Moreover, the existing wheel-holding mechanism is mostly used to complete the tight traction of the single-shaft single-wheel of the aircraft, and is less likely to complete the tight traction of the single-shaft double-wheel of the aircraft.

[0003] Therefore, it is necessary to provide a single-shaft double-wheel type wheel-holding mechanism and aircraft tractor to meet the tight holding and traction of the single-shaft double-wheel aircraft wheel set of different sizes and avoid the situation that the front wheel-holding assembly and the rear wheel-holding assembly are crushed when only used to complete the wheel-holding and load-bearing of the aircraft wheel set. SUMMARY

[0004] The utility model aims at providing a single-shaft double-wheel type wheel-holding mechanism and aircraft tractor, and the specific technical solutions are as follows:

[0005] In the first aspect, the utility model provides a single-shaft double-wheel type wheel-holding mechanism, which comprises a mounting groove, a front wheel-holding assembly, a bearing plate and a rear wheel-holding assembly.

[0006] One end of the mounting groove in the length direction is an open end, and the other end is a closed end.

[0007] The front wheel-holding assembly is arranged on the open end of the mounting groove in an openable and closable manner. The rear wheel-holding assembly is slidably arranged in the closed end of the mounting groove and is arranged close to or away from the front wheel-holding assembly. The bearing plate is arranged in the mounting groove and located between the front wheel-holding assembly and the rear wheel-holding assembly. The wheel-holding space is surrounded by the front wheel-holding assembly, the bearing plate and the rear wheel-holding assembly.

[0008] Optionally, the rear wheel embracing assembly comprises a slide rail, a rear wheel embracing plate, a rear adjusting plate, a first pushing oil cylinder and a second pushing oil cylinder; the slide rail is arranged in the closed end of the mounting groove along the length direction of the mounting groove; the rear wheel embracing plate is arranged in the closed end of the mounting groove, and a slide groove matched with the slide rail is arranged on the rear wheel embracing plate; the housing of the first pushing oil cylinder is fixedly connected with the closed end of the mounting groove, and the working end is connected with the rear wheel embracing plate; the rear adjusting plate is arranged above the rear wheel embracing plate and is rotatably arranged on the closed end of the mounting groove; the housing of the second pushing oil cylinder is fixedly connected with the closed end of the mounting groove, and the working end is hingedly connected with the rear adjusting plate.

[0009] Optionally, two rear wheel embracing grooves matched with the single-axle double-wheel wheel pair are arranged on the rear wheel embracing plate, and the two rear wheel embracing grooves are separated by a protrusion arranged on the rear wheel embracing plate; the number of the first pushing oil cylinders is two, and the two first pushing oil cylinders are arranged in one-to-one correspondence with the two rear wheel embracing grooves; the number of the rear adjusting plates is two, and the two rear adjusting plates are arranged in one-to-one correspondence above the two rear wheel embracing grooves; the number of the second pushing oil cylinders is two, and the two second pushing oil cylinders are arranged in one-to-one correspondence with the two rear adjusting plates.

[0010] Optionally, the rear wheel embracing assembly further comprises a first rotating shaft; the two rear adjusting plates are rotatably arranged on the closed end of the mounting groove through the first rotating shaft.

[0011] Optionally, the rear wheel embracing groove is an arc-shaped rear wheel embracing groove.

[0012] Optionally, the front wheel embracing assembly comprises a front adjusting plate, a pressing plate, a telescopic oil cylinder, a rotating oil cylinder and a locking oil cylinder; the front adjusting plate is rotatably arranged on the open end of the mounting groove; the housing of the rotating oil cylinder is connected with the mounting groove, and the working end is connected with the front adjusting plate; the pressing plate is rotatably arranged on the front adjusting plate; the housing of the telescopic oil cylinder is hingedly connected with the front adjusting plate, and the working end is hingedly connected with the pressing plate; the housing of the locking oil cylinder is connected with the mounting groove, and the working end is connected with the front adjusting plate.

[0013] Optionally, the number of the pressing plates is two, and the two pressing plates are arranged in one-to-one correspondence with the two rear wheel embracing grooves; the number of the telescopic oil cylinders is two, and the two telescopic oil cylinders are arranged in one-to-one correspondence with the two pressing plates.

[0014] Optionally, the front wheel embracing assembly further comprises a second rotating shaft; the two pressing plates are rotatably arranged on the front adjusting plate through the second rotating shaft.

[0015] In a second aspect, the utility model provides a kind of airplane towing vehicle comprising the single-shaft double-wheel type wheel holding mechanism, it further includes towing trolley;Mounting port is set to the tail end of vehicle body and is communicated on the towing trolley;The single-shaft double-wheel type wheel holding mechanism is set on the mounting port;

[0016] It further includes omni-directional steering wheel and lifting drive assembly;The number of the omni-directional steering wheel is multiple, and is evenly arranged in pairs by connecting shaft in the bottom of the towing trolley;The number of the lifting drive assembly is at least two groups, and is symmetrically arranged in the two sides of the bottom of the towing trolley;Each group lifting drive assembly includes first connecting rod, second connecting rod and lifting oil cylinder;One end of the first connecting rod is hinged with the connecting shaft by first connecting seat, and the other end is hinged with one end of the second connecting rod;The end of the second connecting rod away from the first connecting rod is hinged with the bottom of the towing trolley by the second connecting seat;The shell of the lifting oil cylinder is connected with the first connecting seat, and the working end is connected with the second connecting seat.

[0017] Optionally, the number of the towing trolley is multiple, and adjacent towing trolley is connected by the connecting frame.

[0018] The technical scheme of the utility model has at least the following beneficial effects:

[0019] (1) the single-shaft double-wheel type wheel holding mechanism provided by the utility model, the front wheel holding assembly, the bearing plate and the rear wheel holding assembly form a wheel holding space, wherein the rear wheel holding assembly is slidably arranged in the closed end of the mounting groove, and is arranged close to or away from the front wheel holding assembly, so that the size of the wheel holding space is adjustable to meet the holding operation of aircraft wheel sets of different sizes;The bearing plate can assist in bearing part of the weight of the aircraft wheel set, reducing the load of the front wheel holding assembly and the rear wheel holding assembly on the aircraft wheel set, to avoid the front wheel holding assembly and the rear wheel holding assembly being crushed.

[0020] (2) the utility model is provided with two rear wheel holding grooves on the rear wheel holding assembly, which are adapted to single-shaft double-wheel wheel pairs, and two pressing plates are arranged on the front wheel holding assembly, and the two pressing plates are arranged one by one corresponding to the two rear wheel holding grooves, which can meet the holding operation of single-shaft double-wheel aircraft wheel sets.

[0021] (3) The utility model provides a kind of airplane towing vehicle containing single axle double wheel type wheel holding mechanism, different size single axle double wheel wheelset can be realized to the holding traction operation of drawing;Specifically, according to the gap size condition of single axle double wheel wheelset with the compression plate, the first push cylinder is linked to the rear wheel holding plate and is moved to the compression plate along the slide rail, to single axle double wheel wheelset and the compression plate abut, and the second push cylinder is linked to the rear adjusting plate and single axle double wheel wheelset abut, realize the holding operation of different size single axle double wheel wheelset.

[0022] In addition to the purposes, features and advantages described above, the utility model has other purposes, features and advantages. BRIEF DESCRIPTION OF DRAWINGS

[0023] The accompanying drawings, which form a part of this application, are included to provide a further understanding of the application, and are incorporated in and constitute a part of this application. The embodiments illustrated in the drawings are provided to explain the present application and are not intended to limit the present application. In the drawings:

[0024] Figure 1 It is a structure schematic view of a single axle double wheel type wheel holding mechanism in an embodiment;

[0025] Figure 2 It is a top view of a kind of airplane towing vehicle containing the single axle double wheel type wheel holding mechanism in the embodiment;

[0026] Figure 3 It is a side view of a kind of airplane towing vehicle containing the single axle double wheel type wheel holding mechanism in the embodiment;

[0027] Wherein, 1, installation groove, 2, front wheel holding assembly, 2.1, front adjusting plate, 2.2, compression plate, 2.3, telescopic cylinder, 2.4, rotating cylinder, 3, bearing plate, 4, rear wheel holding assembly, 4.1, slide rail, 4.2, rear wheel holding plate, 4.2.1, rear wheel holding groove, 4.2.2, protrusion, 4.3, rear adjusting plate, 4.4, first push cylinder, 4.5, second push cylinder, 5, towing trolley, 5.1, omni-directional steering wheel. DETAILED DESCRIPTION

[0028] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art belong to the scope of protection of the present application.

[0029] Embodiment:

[0030] Referring to Figure 1 A single-shaft double-wheel type embracing wheel mechanism, comprising a mounting groove 1, a front embracing wheel assembly 2, a bearing plate 3 and a rear embracing wheel assembly 4.

[0031] One end of the mounting groove 1 in the length direction is an open end, and the other end is a closed end.

[0032] The front embracing wheel assembly 2 is arranged on the open end of the mounting groove 1 in an openable and closable manner; the rear embracing wheel assembly 4 is slidably arranged in the closed end of the mounting groove 1, and is arranged close to or away from the front embracing wheel assembly 2; the bearing plate 3 is arranged in the mounting groove 1 and located between the front embracing wheel assembly 2 and the rear embracing wheel assembly 4; an embracing wheel space is formed by the front embracing wheel assembly 2, the bearing plate 3 and the rear embracing wheel assembly 4.

[0033] The rear embracing wheel assembly 4 comprises a sliding rail 4.1, a rear embracing wheel plate 4.2, a rear adjusting plate 4.3, a first propelling oil cylinder 4.4 and a second propelling oil cylinder 4.5; the sliding rail 4.1 is arranged in the closed end of the mounting groove 1 along the length direction of the mounting groove 1; the rear embracing wheel plate 4.2 is arranged in the closed end of the mounting groove 1, and a sliding groove adapted to the sliding rail 4.1 is arranged on the rear embracing wheel plate 4.2; the housing of the first propelling oil cylinder 4.4 is fixedly connected with the closed end of the mounting groove 1, and the working end is connected with the rear embracing wheel plate 4.2; the rear adjusting plate 4.3 is arranged above the rear embracing wheel plate 4.2 and rotatably arranged on the closed end of the mounting groove 1; the housing of the second propelling oil cylinder 4.5 is fixedly connected with the closed end of the mounting groove 1, and the working end is hingedly connected with the rear adjusting plate 4.3.

[0034] Two rear wheel embracing grooves 4.2.1 are arranged on the rear wheel embracing plate 4.2 and separated by a protrusion 4.2.2 on the rear wheel embracing plate 4.2, the protrusion 4.2.2 provides abutting support for the adjacent two sides of the single-axle double-wheel wheel pair, ensuring the embracing support effect on the wheel pair; the number of the first propelling oil cylinder 4.4 is two, and each corresponds to one of the two rear wheel embracing grooves 4.2.1; the number of the rear adjusting plate 4.3 is two, and each corresponds to one of the two rear wheel embracing grooves 4.2.1; the number of the second propelling oil cylinder 4.5 is two, and each corresponds to one of the two rear adjusting plates 4.3.

[0035] The rear wheel embracing assembly 4 further comprises a first rotating shaft; the two rear adjusting plates 4.3 are rotatably arranged on the closed end of the mounting groove 1 through the first rotating shaft.

[0036] The rear wheel embracing groove 4.2.1 is an arc-shaped wheel embracing groove, which improves the close embracing effect on the wheel pair.

[0037] The front wheel embracing assembly 2 comprises a front adjusting plate 2.1, a pressing plate 2.2, an extension oil cylinder 2.3, a rotating oil cylinder 2.4 and a locking oil cylinder (not shown in the figure); the front adjusting plate 2.1 is rotatably arranged on the open end of the mounting groove 1; the housing of the rotating oil cylinder 2.4 is connected with the mounting groove 1, and its working end is connected with the front adjusting plate 2.1; the pressing plate 2.2 is rotatably arranged on the front adjusting plate 2.1; the housing of the extension oil cylinder 2.3 is hingedly connected with the front adjusting plate 2.1, and its working end is hingedly connected with the pressing plate 2.2; the housing of the locking oil cylinder is connected with the mounting groove 1, and its working end is connected with the front adjusting plate 2.1.

[0038] The number of the pressing plate 2.2 is two, and each corresponds to one of the two rear wheel embracing grooves 4.2.1; the number of the extension oil cylinder 2.3 is two, and each corresponds to one of the two pressing plates 2.2.

[0039] The front wheel embracing assembly 2 further comprises a second rotating shaft; the two pressing plates 2.2 are rotatably arranged on the front adjusting plate 2.1 through the second rotating shaft.

[0040] Referring to Figures 2-3 An aircraft towing vehicle comprising the single-axle double-wheel wheel embracing mechanism further comprises a towing trolley 5 (specifically an intelligent electric trolley); a mounting port is arranged on the towing trolley 5 and communicates with the tail end of the vehicle body; the single-axle double-wheel wheel embracing mechanism is arranged on the mounting port;

[0041] Also included are omni-directional steering wheels 5.1 and a lifting driving assembly (not shown in the figure); the number of the omni-directional steering wheels 5.1 is four, and they are evenly arranged in pairs on the bottom of the traction trolley 5 through connecting shafts; the number of the lifting driving assembly is at least two groups, and they are symmetrically arranged on both sides of the bottom of the traction trolley 5; each group of the lifting driving assembly includes a first connecting rod, a second connecting rod and a lifting oil cylinder; one end of the first connecting rod is hinged to the connecting shaft through a first connecting seat, and the other end is hinged to one end of the second connecting rod; the end of the second connecting rod away from the first connecting rod is hinged to the bottom of the traction trolley 5 through a second connecting seat; the shell of the lifting oil cylinder is connected to the first connecting seat, and the working end is connected to the second connecting seat.

[0042] The number of the traction trolley 5 is multiple, and the corresponding number of the traction trolley 5 is used according to the number of the single-axle double-wheel wheel pair of the airplane, and the adjacent traction trolleys 5 are connected through the connecting frame, realizing the overall traction of the airplane.

[0043] The traction method of the single-axle double-wheel type embracing wheel mechanism airplane traction vehicle is as follows:

[0044] Step S1, control the traction trolley 5 to approach the single-axle double-wheel wheel pair of the airplane, and control the lifting oil cylinder to lower the traction trolley 5 in linkage, so as to facilitate the subsequent embracing wheel operation; control the rotating oil cylinder 2.4 to open the front adjusting plate 2.1 in linkage, and control the telescopic oil cylinder 2.3 to open the pressing plate 2.2 in linkage; at the same time, control the traction trolley 5 to reverse to the position of the single-axle double-wheel wheel pair of the airplane, and continue to reverse until the single-axle double-wheel wheel pair abuts against the rear embracing wheel plate 4.2, and then stop reversing;

[0045] Step S2, control the rotating oil cylinder 2.4 to retract the front adjusting plate 2.1 in linkage, and control the telescopic oil cylinder 2.3 to retract the pressing plate 2.2 in linkage; then, control the locking oil cylinder to lock the front adjusting plate 2.1; if there is a gap between the single-axle double-wheel wheel pair and the pressing plate 2.2, control the first propelling oil cylinder 4.4 to move the rear embracing wheel plate 4.2 along the slide rail 4.1 to the pressing plate 2.2 in linkage, until the single-axle double-wheel wheel pair abuts against the pressing plate 2.2, and control the second propelling oil cylinder 4.5 to make the rear adjusting plate 4.3 abut against the single-axle double-wheel wheel pair in linkage, realizing the embracing operation of the single-axle double-wheel wheel pair;

[0046] Step S3, control the traction trolley 5 to move the airplane to the target position.

[0047] The traction method further includes, after the traction trolley 5 leaves the airplane in step S3, controlling the lifting oil cylinder to lift the traction trolley 5 in linkage, so as to avoid obstacles during traction;

[0048] The traction method further comprises a step S5, which comprises adopting a corresponding number of the traction trolleys 5 according to the number of single-axle double-wheel wheel pairs of the aircraft, and connecting adjacent traction trolleys 5 through the connecting frames to realize overall traction of the aircraft.

[0049] The above merely describes preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can be variously changed and modified. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A single-axle double-wheel type holding wheel mechanism characterized by comprising: The application relates to a front and rear wheel assembly for a wheel loader, which comprises a mounting groove (1), a front wheel assembly (2), a bearing plate (3) and a rear wheel assembly (4). One end of the mounting groove (1) is an open end in the length direction, and the other end is a closed end. The front wheel assembly (2) is arranged on the open end of the mounting groove (1) in an openable and closable mode; the rear wheel assembly (4) is arranged in the closed end of the mounting groove (1) in a slidable mode and is arranged close to or away from the front wheel assembly (2); the bearing plate (3) is arranged in the mounting groove (1) and is located between the front wheel assembly (2) and the rear wheel assembly (4); a wheel space is formed by the front wheel assembly (2), the bearing plate (3) and the rear wheel assembly (4).

2. The single shaft double wheel type wheel-holding mechanism according to claim 1, characterized by The rear wheel assembly (4) comprises a sliding rail (4.1), a rear wheel plate (4.2), a rear adjusting plate (4.3), a first pushing oil cylinder (4.4) and a second pushing oil cylinder (4.5); the sliding rail (4.1) is arranged in the closed end of the mounting groove (1) in the length direction of the mounting groove (1); the rear wheel plate (4.2) is arranged in the closed end of the mounting groove (1), a sliding groove matched with the sliding rail (4.1) is arranged on the rear wheel plate (4.2); the shell of the first pushing oil cylinder (4.4) is fixedly connected with the closed end of the mounting groove (1), and the working end is connected with the rear wheel plate (4.2); the rear adjusting plate (4.3) is arranged above the rear wheel plate (4.2) and is arranged on the closed end of the mounting groove (1) in a rotatable mode; the shell of the second pushing oil cylinder (4.5) is fixedly connected with the closed end of the mounting groove (1), and the working end is hingedly connected with the rear adjusting plate (4.3).

3. The single shaft double wheeled roto-grip mechanism of claim 2, wherein, Two rear wheel grooves (4.2.1) matched with single-axle double-wheel wheel pairs are arranged on the rear wheel plate (4.2) and are separated by a protrusion (4.2.2) arranged on the rear wheel plate (4.2); the number of the first pushing oil cylinders (4.4) is two, and the first pushing oil cylinders (4.4) are arranged in one-to-one correspondence with the two rear wheel grooves (4.2.1); the number of the rear adjusting plates (4.3) is two, and the rear adjusting plates (4.3) are arranged above the two rear wheel grooves (4.2.1) in one-to-one correspondence; the number of the second pushing oil cylinders (4.5) is two, and the second pushing oil cylinders (4.5) are arranged in one-to-one correspondence with the two rear adjusting plates (4.3).

4. The single shaft double wheeled roto-grip mechanism of claim 3, wherein, The rear wheel assembly (4) further comprises a first rotating shaft; the two rear adjusting plates (4.3) are rotatably arranged on the closed end of the mounting groove (1) through the first rotating shaft.

5. The single shaft double wheeled hugging wheel mechanism according to claim 3, wherein The rear wheel grooves (4.2.1) are arc-shaped wheel grooves.

6. The single shaft double wheeled caterpillar track of claim 3 wherein, The front wheel embracing assembly (2) comprises a front adjusting plate (2.1), a pressing plate (2.2), a telescopic oil cylinder (2.3), a rotating oil cylinder (2.4) and a locking oil cylinder; the front adjusting plate (2.1) is rotatably arranged at the opening end of the mounting groove (1); the housing of the rotating oil cylinder (2.4) is connected with the mounting groove (1), and the working end thereof is connected with the front adjusting plate (2.1); the pressing plate (2.2) is rotatably arranged on the front adjusting plate (2.1); the housing of the telescopic oil cylinder (2.3) is hingedly connected with the front adjusting plate (2.1), and the working end thereof is hingedly connected with the pressing plate (2.2); the housing of the locking oil cylinder is connected with the mounting groove (1), and the working end thereof is connected with the front adjusting plate (2.1).

7. The single shaft double wheeled caterpillar track according to claim 6, wherein The number of the pressing plates (2.2) is two, and each of the two pressing plates is correspondingly arranged with a rear wheel embracing groove (4.2.1); the number of the telescopic oil cylinders (2.3) is two, and each of the two telescopic oil cylinders is correspondingly arranged with a pressing plate (2.2).

8. The single shaft double wheeled caterpillar track of claim 6 wherein, The front wheel embracing assembly (2) further comprises a second rotating shaft; the pressing plate (2.2) is rotatably arranged on the front adjusting plate (2.1) through the second rotating shaft.

9. A tug for an aircraft comprising a single-axle double-wheel bogie according to any one of claims 1 to 8, characterized in that A traction trolley (5) is further included; a mounting opening is arranged on the traction trolley (5) and communicates with the tail end of the vehicle body; the single-axle double-wheel wheel embracing mechanism is arranged on the mounting opening; A plurality of omnidirectional steering wheels (5.1) and a lifting driving assembly are further included; the plurality of omnidirectional steering wheels (5.1) are uniformly arranged in pairs on the bottom of the traction trolley (5) through connecting shafts; the number of the lifting driving assemblies is at least two groups, and the two groups are symmetrically arranged on the two sides of the bottom of the traction trolley (5); each group of the lifting driving assemblies comprises a first connecting rod, a second connecting rod and a lifting oil cylinder; one end of the first connecting rod is hingedly connected with the connecting shaft through a first connecting seat, and the other end thereof is hingedly connected with one end of the second connecting rod; the end of the second connecting rod away from the first connecting rod is hingedly connected with the bottom of the traction trolley (5) through a second connecting seat; the housing of the lifting oil cylinder is connected with the first connecting seat, and the working end thereof is connected with the second connecting seat.

10. The aircraft tug of claim 9, characterized in that The number of the traction trolleys (5) is a plurality, and the adjacent traction trolleys (5) are connected through the connecting frames.

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