Variable-pitch pull rod adjusting and limiting tool

Abstract

The utility model discloses a variable pitch pull rod adjusting and limiting tool which comprises two limiting clamping blocks with grooves, the grooves are U-shaped deep grooves so that two limiting columns with the same size can be formed on the two sides of the grooves, and handles parallel to the limiting columns are arranged on the sides, away from the grooves, of the limiting clamping blocks. According to the adjusting and limiting tool for the variable-pitch pull rod, the limiting clamping block is installed at the gap of the ball bearings at the two ends of the variable-pitch pull rod to integrally limit the variable-pitch pull rod, the situation that a bearing of the variable-pitch pull rod is uneven in stress and machine parts are damaged is effectively prevented, and meanwhile the variable-pitch pull rod can be directly taken out through the handle arranged on the back face of the groove of the limiting clamping block after adjustment is completed; the adjusting efficiency of the variable-pitch pull rod is improved, and the variable-pitch pull rod is not prone to being affected and damaged.

Description

Technical Field

[0001] The utility model relates to the technical field of helicopter parts tooling, and more specifically, to a variable pitch pull rod adjustment limit tooling. Background Art

[0002] When adjusting the rotor cone of a helicopter, the length of the pitch rod needs to be adjusted. When adjusting the length, a wrench needs to be used to loosen the pitch rod locking nut. During the use of the wrench, since the pitch rod bearing is not limited, there is a possibility of uneven force damaging the rod bearing. The pitch rod adjustment limit tool is used to limit the spherical bearings at the upper and lower ends of the pitch rod, which makes it convenient to use a wrench to quickly loosen the nuts for adjustment and avoid damage caused by uneven force on the bearing.

[0003] The utility model patent with patent number CN215967523U discloses a helicopter pitch rod adjustment and positioning clamp, including an upper clamp block and a lower clamp block; the upper clamp block includes a base plate, one side of the base plate is dug with an arc-shaped groove, and two strip-shaped limit columns extend from both ends of the arc-shaped groove along the normal direction of the base plate, which can effectively prevent the upper and lower shank bearings from rubbing against the upper and lower fork ears when the pitch rod is adjusted, thereby improving the efficiency of helicopter maintenance.

[0004] However, after the pitch rod is adjusted, the position of the handle bearing changes, making it difficult to remove the upper and lower clamps from both ends of the pitch rod. Tools need to be used to knock them out at the end of the limit column, which reduces work efficiency and affects the position of the adjusted pitch rod. At the same time, knocking out the clamps can easily damage the pitch rod. Summary of the invention

[0005] An object of the present invention is to solve the above-mentioned problems and / or disadvantages and to provide advantages which will be described below.

[0006] In order to achieve these purposes and other advantages of the utility model, a variable distance pull rod adjustment limit tooling is provided, including: two limit clamping blocks with grooves, the grooves are "U"-shaped deep grooves, so as to form two limit columns of the same size on both sides of the grooves, and the limit clamping blocks are provided with a handle parallel to the limit column on the side away from the groove.

[0007] Preferably, the handle surface is provided with anti-slip patterns.

[0008] Preferably, an anti-dropping convex strip is provided at the end of the handle;

[0009] An anti-slip groove is arranged beside the anti-slip convex strip.

[0010] Preferably, the handle is provided with a through hole;

[0011] A connecting rope connecting the two limiting clamping blocks is passed through the through hole.

[0012] The utility model includes at least the following beneficial effects: by installing limiting clamps at the gaps between the ball bearings at both ends of the variable pitch rod, the variable pitch rod is limited as a whole, effectively preventing the variable pitch rod bearings from being subjected to uneven force and damaging the machine parts; after adjustment, the variable pitch rod can be directly taken out through a handle arranged on the back side of the groove of the limiting clamp, thereby improving the adjustment efficiency of the variable pitch rod and not easily affecting or damaging the variable pitch rod.

[0013] Other advantages, objectives and features of the present invention will be reflected in part through the following description, and in part will be understood by those skilled in the art through research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic structural diagram of a variable pitch pull rod adjustment limit tooling in one embodiment of the utility model.

[0015] Markings in the figure: 1. Limit clamp block, 11. Groove, 12. Limit column, 2. Handle, 21. Anti-slip convex strip, 22. Anti-slip groove, 23. Through hole, 24. Anti-slip pattern, 3. Connecting rope. DETAILED DESCRIPTION

[0016] The present invention will be further described in detail below in conjunction with the accompanying drawings so that those skilled in the art can implement the invention with reference to the description.

[0017] It should be understood that terms such as “having”, “including” and “comprising” used herein do not recite the existence or addition of one or more other elements or combinations thereof.

[0018] It should be noted that in the description of the present invention, the orientation or position relationship indicated by the term is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0019] In the description of the present utility model, unless otherwise clearly stipulated and limited, the terms "installed", "provided with", "mounted / connected", "connected", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection. It can be a mechanical connection or an electrical connection. It can be a direct connection or an indirect connection through an intermediate medium. It can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the utility model can be understood according to specific circumstances.

[0020] In addition, in the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0021] Example 1

[0022] A variable distance pull rod adjustment limit tooling, its structure is as follows Figure 1 As shown, it includes: two limiting clamps 1 with grooves 11, the grooves 11 are "U"-shaped deep grooves to form two limiting columns 12 of the same size on both sides of the grooves 11, and the limiting clamps 1 are provided with a handle 2 parallel to the limiting columns 12 on the side away from the grooves 11.

[0023] In actual applications, the thickness of the limit clamp 1 is set according to the gap distance between the ball bearing of the variable pitch pull rod and the parts connected thereto, and the distance between the limit columns on both sides is determined according to the diameter of the ball bearing; the limit clamp 1 is configured to be made of nylon material with lower hardness, which can better prevent damage to the ball bearing.

[0024] Working principle: When adjusting the length of the pitch rod, the locking nut needs to be loosened. At this time, the ball bearings at the upper and lower ends of the pitch rod are in a floating state, and their angles cannot be fixed. During adjustment, the ball bearings at both ends of the pitch rod are unevenly stressed, which may damage the machine parts. Therefore, before adjustment, the grooves 11 of the two limit clamps 1 need to be installed respectively corresponding to the gaps between one end of the ball bearings at the upper and lower ends of the pitch rod and the connecting parts, so that the two end surfaces of the grooves 11 respectively support the pitch rod ball bearings and the connecting parts at both ends of the pitch rod to fix the gap position between the two. After the gap is fixed, the pitch rod is adjusted to effectively prevent the pitch rod bearings from being unevenly stressed and damaging the machine parts. After the adjustment is completed, the handle 2 provided on the side of the limit clamp 1 away from the groove 11 can be used to directly remove it by hand, thereby achieving the purpose of quick disassembly and improving the adjustment efficiency of the pitch rod, which is not easy to affect and damage the pitch rod.

[0025] Example 2

[0026] This embodiment 2 is a preferred embodiment of the present invention, and its specific structure is as follows Figure 1 As shown, the following improvement is disclosed based on the embodiment 1: the surface of the handle 2 is provided with anti-slip grooves 24.

[0027] In actual application, the handle 2 is configured with nylon material; the anti-slip pattern 24 arranged on the surface of the handle 2 is a "well"-shaped anti-slip convex pattern; when in use, the friction between the handle 2 and the hand can be effectively increased under the same gripping force, which is conducive to the adjustment of the rear limit clamp 1 to smoothly separate from the pitch rod ball bearing.

[0028] Example 3

[0029] This embodiment 3 is a preferred embodiment of the present utility model, and the specific structure is as follows Figure 1 As shown, it discloses the following improvements based on the embodiment 1: an anti-dropping convex strip 21 is provided at the end of the handle 2;

[0030] An anti-slip groove 22 is provided beside the anti-slip convex strip 21 .

[0031] Working principle: the anti-slip groove 22 is provided so that the clamping end of the clamping tool can be clamped with the anti-slip groove 22. When the staff cannot remove it by hand, they can use tools to apply pulling force along the extension direction of the handle 2 to remove the limit tooling; the anti-slip convex strip 21 is provided to stop the hand or other clamping tools when removing the limit tooling, so as to prevent the clamping tool or hand from slipping and separating from the handle 2 when removing;

[0032] Example 4

[0033] This embodiment 4 is a preferred embodiment of the present utility model, and its specific structure is as follows Figure 1 As shown, it discloses the following improvements based on the embodiment 1: the handle 2 is provided with a through hole 23;

[0034] A connecting rope 3 connecting the two limiting clamping blocks 1 is passed through the through hole 23 .

[0035] Working principle: a connecting rope 3 is provided to connect the handles 2 of the two limit clamps 1, so as to facilitate storage in pairs and prevent loss.

[0036] The above solutions are only an illustration of a preferred example, but are not limited thereto. When implementing the present utility model, appropriate replacement and / or modification can be performed according to user needs.

[0037] The number of devices and processing scales described here are used to simplify the description of the utility model. Applications, modifications and variations of the utility model are obvious to those skilled in the art.

[0038] Although the embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and the embodiments. It can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily realized. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and the illustrations shown and described here.

Claims

1. A variable pitch pull rod adjustment limit tooling, comprising: Two limit clamps with grooves, wherein the grooves are "U"-shaped deep grooves to form two limit columns of the same size on both sides of the grooves, characterized in that a handle parallel to the limit column is provided on the side of the limit clamp away from the groove.

2. The variable pitch pull rod adjustment and limiting tooling according to claim 1, characterized in that: The surface of the handle is provided with anti-slip patterns.

3. The variable pitch pull rod adjustment and limiting tooling according to claim 1, characterized in that: The end of the handle is provided with an anti-dropping convex strip; An anti-slip groove is arranged beside the anti-slip convex strip.

4. The variable pitch pull rod adjustment and limiting tooling according to claim 1, characterized in that: The handle is provided with a through hole; A connecting rope connecting the two limiting clamping blocks is passed through the through hole.

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