A structure for adjusting and locking the cam travel position

Abstract

This utility model relates to the field of tail landing gear technology, and more particularly to a structure for adjusting and locking the cam travel position. It includes a cylindrical pin and a connecting plate, the cylindrical pin being mounted on the connecting plate and passing through a piston rod assembly; a spring washer disposed on the connecting plate, through which a screw passes, and the screw is threadedly connected to an adjusting mechanism; a pressure end cap threadedly connected to the right end of the adjusting assembly; and a travel adjustment mechanism mounted on the piston rod assembly. The structure for adjusting and locking the cam travel position provided by this utility model can fix the piston rod by setting a fixed threaded sleeve, and tightening the control component can push the top tightening threaded sleeve to press against the sealing bearing and cam, thereby achieving adjustment and locking of the cam travel. This enables the adjustment of the tail landing gear travel and meets the process requirements for ensuring and locking the relative position of the upper cam and piston rod, followed by machining a stop structure, effectively increasing the convenience of adjustment operation and the reliability of locking.

Description

Technical Field

[0001] This utility model relates to the field of tail landing gear technology, and in particular to a structure for adjusting and locking the cam travel position. Background Technology

[0002] The cam in the tail landing gear is a component of a rotating mechanism. Through its special profile design, it enables ascending, descending, and lateral swaying movements. Cams are typically used in conjunction with hydraulic or mechanical systems; by controlling the rotation of the cam, the retraction and extension of the landing gear are achieved.

[0003] The stroke of cams in existing landing gear is often not adjustable, or it is difficult to lock them after the stroke is adjusted. Therefore, a structure is needed to adjust and lock the cam stroke position to solve the above problems. Utility Model Content

[0004] The purpose of this utility model embodiment is to provide a structure for adjusting and locking the cam stroke position, aiming to solve the problems mentioned in the background art.

[0005] This utility model embodiment is implemented as follows: a structure for adjusting and locking the cam stroke position includes: a cylindrical pin and a connecting plate, the cylindrical pin being mounted on the connecting plate and passing through a piston rod assembly; a spring washer disposed on the connecting plate, a screw passing through the connecting plate, the screw being threadedly connected to an adjusting mechanism, the screw being used to fix the adjusting mechanism and the piston rod assembly; a clamping end cap, which is threadedly connected to the right end of the adjusting assembly for limiting the piston rod assembly; and a stroke adjustment mechanism mounted on the piston rod assembly for adjusting the qualified stroke of the cam on the piston rod assembly.

[0006] Preferably, the adjusting mechanism includes: a fixed threaded sleeve, which is threadedly connected to a screw, the screw being used to fix the connecting plate and the fixed threaded sleeve; a tightening control component, the left side of which is screwed into the fixed threaded sleeve via a left-hand thread, and the right side of the tightening control component is screwed into a tightening threaded sleeve via a right-hand thread, the pressure end cap and the tightening threaded sleeve being threadedly connected; and two set screws, which can pass through the tightening control component and are threadedly connected to the fixed threaded sleeve and the tightening threaded sleeve, for locking the cam stroke of the piston rod assembly.

[0007] Preferably, the stroke adjustment mechanism includes: a thick washer mounted on the piston rod assembly, the thick washer contacting a thin washer mounted on the piston rod assembly, the thickness difference between the thin washer and the thick washer being 0.1 mm and multiple washers being provided, for adjusting the cam to a qualified stroke.

[0008] The structure provided by this utility model for adjusting and locking the cam stroke position uses a fixed screw sleeve to fix the piston rod. Tightening the control component pushes the top screw sleeve to press against the sealing bearing and cam, thereby adjusting and locking the cam stroke. This enables the adjustment of the tail landing gear stroke and meets the process requirements for ensuring and locking the relative position of the upper cam and piston rod, followed by machining a stop structure. This effectively increases the convenience of adjustment and the reliability of locking. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the structure used to adjust and lock the cam travel position.

[0010] Figure 2 This is a schematic diagram of an adjustment mechanism used to adjust and lock the position of the cam travel.

[0011] In the attached diagram: 1-cylindrical pin, 2-connecting plate, 3-spring washer, 4-screw, 5-adjusting mechanism, 6-pressing end cap, 7-stroke adjustment mechanism, 51-fixed threaded sleeve, 52-tightening control component, 53-tightening threaded sleeve, 54-set screw, 71-thick washer, 72-thin washer. Detailed Implementation

[0012] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and do not limit the present utility model.

[0013] The specific implementation of this utility model will be described in detail below with reference to specific embodiments.

[0014] Please see Figure 1 This utility model provides a structure for adjusting and locking the cam stroke position, the structure for adjusting and locking the cam stroke position includes:

[0015] A cylindrical pin 1 and a connecting plate 2 are provided, wherein the cylindrical pin 1 is mounted on the connecting plate 2 and passes through the piston rod assembly; a spring washer 3 is provided on the connecting plate 2, through which a screw 4 passes, and the screw 4 is threadedly connected to an adjusting mechanism 5, which is used to fix the adjusting mechanism 5 and the piston rod assembly; a clamping end cap 6 is threadedly connected to the right end of the adjusting assembly 5 and is used to limit the piston rod assembly; and a stroke adjustment mechanism 7 is mounted on the piston rod assembly and is used to adjust the qualified stroke of the cam on the piston rod assembly.

[0016] When clamping and positioning the piston rod assembly, avoid directly clamping the piston rod surface. Instead, use the mounting hole on the left side of the piston rod assembly and a cylindrical pin 1 and connecting plate 2 to fix the adjusting mechanism 5 to the non-mating surface of the piston rod assembly. This ensures that the position of the piston rod remains unchanged and in a tight connection when adjusting the cam stroke. In addition, a bushing is used to protect the piston rod surface.

[0017] On the tail landing gear piston rod assembly, from right to left, the upper bearing, upper cam, lower cam, flat key, sealed bearing, and outer nut are assembled sequentially. The upper bearing is fixed to the right end of the piston rod with a set screw, and the upper cam, lower cam, flat key, and sealed bearing are limited at their left ends by the clamping end cap 6.

[0018] like Figure 1 and Figure 2 As shown, in a preferred embodiment of this utility model, the adjusting mechanism 5 includes: a fixed threaded sleeve 51, which is threadedly connected to a screw 4, the screw 4 being used to fix the connecting plate 2 and the fixed threaded sleeve 51; a tightening control member 52, the left side of which is screwed into the fixed threaded sleeve 51 via a left-hand thread, and the right side of the tightening control member 52 is screwed into a tightening threaded sleeve 53 via a right-hand thread, the pressing end cap 6 and the tightening threaded sleeve 53 being threadedly connected; and two set screws 54, which can pass through the tightening control member 52 and are threadedly connected to the fixed threaded sleeve 51 and the tightening threaded sleeve 53, for locking the cam stroke of the piston rod assembly.

[0019] The left side of the tightening control component 52 is screwed into the fixed screw sleeve 51 with a left-hand thread, and the right side is screwed into the tightening screw sleeve 53 with a right-hand thread. When the tightening control component 52 is operated, the cam stroke is adjusted. After reaching the required position, tightening the set screw 54 can lock the stroke.

[0020] After the cam stroke is adjusted to be qualified, in order to remove the piston rod assembly from the outer cylinder assembly as a whole and to machine the stop screw hole, a quick removal structure in the locked state is designed. That is, the outer diameter of the mating part between the top screw sleeve 53 and the pressure end cover 6 is designed to be smaller than the inner hole of the pressure end cover 6. At this time, unscrewing the pressure end cover 6 can ensure that the piston rod assembly can be smoothly removed from the outer cylinder assembly while the upper and lower cams are continuously pressed.

[0021] like Figure 1 As shown, in a preferred embodiment of the present invention, the stroke adjustment mechanism 7 includes: a thick washer 71, which is mounted on the piston rod assembly, and a thin washer 72 mounted on the piston rod assembly. The thickness difference between the thin washer 72 and the thick washer 71 is 0.1 mm and there are multiple thin washers, which are used to adjust the cam to a qualified stroke.

[0022] The distance between the left end face of the upper bearing and the right end face of the upper cam is the range of cam stroke that needs to be adjusted. By calculation and considering the economics of machining, a trial assembly is performed using a thick washer 71 and several thin washers with thicknesses differing by 0.1 mm, thereby adjusting the qualified stroke of the cam.

[0023] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A structure for adjusting and locking cam stroke position comprising a cylindrical pin and a connecting plate, characterized in that, The cylindrical pin is mounted on the connecting plate and passes through the piston rod assembly; A spring washer is disposed on a connecting plate through which a screw passes. The screw is threadedly connected to an adjustment mechanism, and the screw is used to fix the adjustment mechanism and the piston rod assembly. The clamping end cap, which is threadedly connected to the right end of the adjusting assembly, is used to limit the piston rod assembly; The stroke adjustment mechanism, which is mounted on the piston rod assembly, is used to adjust the qualified stroke of the cam on the piston rod assembly.

2. The structure for adjusting and locking the cam stroke position according to claim 1, wherein The adjustment mechanism includes: A fixed threaded sleeve is threadedly connected to a screw, which is used to fix the connecting plate and the fixed threaded sleeve. The tightening control component has a left-hand thread and a fixed screw sleeve on its left side, and a right-hand thread and a top screw sleeve on its right side. The pressure end cap and the top screw sleeve are threadedly connected. Two set screws are provided, which can pass through the tightening control and be threadedly connected to the fixed threaded sleeve and the top tightening threaded sleeve, for locking the cam stroke of the piston rod assembly.

3. The structure for adjusting and locking the cam stroke position according to claim 1, wherein The itinerary adjustment mechanism includes: A thick washer is mounted on the piston rod assembly. The thick washer contacts a thin washer mounted on the piston rod assembly. The thickness difference between the thin and thick washers is 0.1 mm, and multiple thin washers are provided. This is used to adjust the cam to the required stroke.

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