A cam bracket positioning and mounting device and method for helicopter slant beam components

Abstract

This invention provides a cam bracket positioning and installation device and method for helicopter inclined beam components. In this device, a positioning block is installed in the middle of a positioning shaft. The positioning shaft and positioning block, when combined, are used for positioning the cam bracket. One end of the positioning shaft is assembled with a first adapter shaft, and the other end is assembled with a second adapter shaft. The first and second adapter shafts together are used for positioning the device on the inclined beam. The first and second adapter shafts can slide along the axis of the positioning shaft. A clamping nut is located below the second adapter shaft. A positioning pin and a plate nut are installed on the positioning block. The positioning block and the positioning shaft, and the first adapter shaft and the positioning shaft, are fixed by pins. The structure is simple and easy to operate. It can effectively position and clamp the cam bracket using the inclined beam joint hole as a reference, ensuring the installation accuracy of the cam bracket. The positioning operation between the device and the inclined beam joint is convenient, and the main structural components do not need to be completely disassembled during use, exhibiting good usability.

Description

Technical Field

[0001] This invention belongs to the field of helicopter process equipment design technology, and particularly relates to a cam bracket positioning and installation device and method for helicopter inclined beam components. Background Technology

[0002] The helicopter's slant beam assembly has a cam bracket at its front end, used to mount cams, which are auxiliary structural components of sensors. The original cam bracket assembly used a slant beam assembly fixture with a corresponding positioning structure for positioning and installation. However, because this involves reaming operations on the slant beam joint, the operating space is limited, and the cam bracket positioning structure hinders these reaming operations.

[0003] Therefore, a cam support positioning and installation device for use outside the frame is needed. Summary of the Invention

[0004] The technical problem to be solved by the present invention is that the cam bracket positioning structure hinders the reaming operation of the inclined beam joint. The present invention provides a cam bracket positioning and installation device and method for helicopter inclined beam components, which replaces the original method of setting the cam bracket positioning structure in the inclined beam component assembly fixture. This method not only facilitates the external positioning and installation of the cam bracket, but also improves the installation accuracy of the cam bracket.

[0005] The technical solution of this invention is:

[0006] A cam bracket positioning and mounting device for a helicopter slant beam component is provided, comprising: a positioning shaft 1, a positioning block 2, a first adapter shaft 3, a second adapter shaft 4, a clamping nut 5, a positioning pin 6, a plate nut 7, and a pin 8.

[0007] Positioning block 2 is installed in the middle of positioning shaft 1. Positioning shaft 1 and positioning block 2 are used for positioning the cam bracket after being combined. One end of positioning shaft 1 is assembled with adapter shaft 3 and the other end is assembled with adapter shaft 4. Adapter shaft 3 and adapter shaft 4 are used together for positioning the device on the inclined beam. Adapter shaft 3 and adapter shaft 4 can slide along the axis on positioning shaft 1. The clamping nut 5 is located below adapter shaft 4. Positioning pin 6 and plate nut 7 are installed on positioning block 2. Positioning block 2 and positioning shaft 1, and adapter shaft 3 and positioning shaft 1 are fixed by pin 8.

[0008] Optionally, the positioning shaft 1 includes a stepped shaft 11 and a cylindrical pin 12; the stepped shaft 11 is a multi-segment stepped shaft; the middle section of the stepped shaft 11 is assembled with the positioning block 2, one end is assembled with the first adapter shaft 3, and the other end is assembled with the second adapter shaft 4, all of which are shaft hole fits and can slide along the axis; the cylindrical pin 12 is installed at both ends of the stepped shaft 11 to limit the first adapter shaft 3 and the second adapter shaft 4 and prevent the first adapter shaft 3 and the second adapter shaft 4 from falling off.

[0009] Optionally, the central circular hole on the positioning block 2 and the positioning shaft 1 are in a shaft-hole fit relationship. The positioning block 2 is provided with multiple positioning holes, which correspond to the connection holes of the cam bracket. The side of the positioning block 2 is provided with one circular hole.

[0010] Optionally, there are two positioning blocks 2, and the relative positional relationship between the two positioning blocks 2 is determined based on the machining accuracy requirements of the positioning shaft 1 and the positioning blocks 2.

[0011] Optionally, the first adapter shaft 3 is located at the lower end of the positioning shaft 1 and is a sleeve-type stepped shaft. The cylindrical section at the lower outer end mates with the joint of the inclined beam and together with the second adapter shaft 4, it is used for positioning the device on the inclined beam. The first adapter shaft 3 can slide along the axis on the positioning shaft 1. The elongated groove provided on it allows the first adapter shaft 3 to be limited by the cylindrical pin 12 on the positioning shaft 1. A circular hole is provided on the first adapter shaft 3, which corresponds to the hole on the positioning shaft 1.

[0012] Optionally, the adapter shaft 4 is located on the upper end of the positioning shaft 1. It is a sleeve-type stepped shaft, with the upper outer cylindrical section engaging with the joint of the inclined beam. The device is fixed on the inclined beam by tightening the nut 5. The adapter shaft 4 can slide along the axis on the positioning shaft 1. The elongated groove provided on it allows the adapter shaft 4 to be limited by the cylindrical pin 12 on the positioning shaft 1.

[0013] Optionally, the clamping nut 5 is located below the adapter shaft 4, with a threaded hole at its center, corresponding to the threaded section on the positioning shaft 1. The threaded structure provides axial thrust, pushing the adapter shaft 4 upward, so that both ends of the device are tightly attached to the inclined beam joint.

[0014] Optionally, the positioning pin 6 and the plate nut 7 are installed in multiple round holes on the positioning block 2. Only one round hole needs to be selected for positioning and tightening of the cam bracket. The positioning pin 6 is a stepped pin with a cylindrical positioning section in the middle and a threaded section at the bottom, corresponding to the threaded hole on the plate nut 7.

[0015] Optionally, the pin 8 has a tethering hole, which is connected to the tethering hole on the positioning shaft 1 by a tethering rope.

[0016] A method for positioning and installing a cam bracket for a helicopter slant beam component is provided, for use with any of the apparatuses described in the first aspect, the method comprising:

[0017] The cam bracket is placed at the positioning block 2 of this device, and the positioning block 2 and the positioning shaft 1 are fixed by the pin 8. The cam bracket and the positioning block 2 are fixed by the positioning pin 6 and the plate nut 7, so as to realize the clamping of the cam bracket on this device.

[0018] Move the first adapter shaft 3 and the second adapter shaft 4 towards the middle of the positioning shaft 1, and place the device on the inclined beam joint for positioning. First, use the pin 8 to position and fix the first adapter shaft 3 and the positioning shaft 1, and then tighten the clamping nut 5 until the second adapter shaft 4 is tightly attached to the inclined beam joint. At this time, the riveting operation between the cam bracket and the inclined beam can be carried out.

[0019] After completing the riveting operation between the cam bracket and the inclined beam, remove the positioning pin 6 and plate nut 7, pull out all the pins 8, and screw the clamping nut 5 to the lower side of the threaded section of the positioning shaft 1. Move the first adapter shaft 3 and the second adapter shaft 4 towards the middle of the positioning shaft 1, and the device can be removed.

[0020] The beneficial effects of this application are as follows:

[0021] This device features a simple structure and convenient operation. It effectively positions and clamps the cam support using the inclined beam joint hole as a reference, ensuring the cam support's installation accuracy. The positioning operation between the device and the inclined beam joint is convenient, and the main structural components do not require complete disassembly during use, offering excellent usability. This device can be used after the inclined beam components have been assembled and removed from the assembly line, providing better operability compared to operations on inclined beam assembly fixtures. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of a cam bracket positioning and mounting device for a helicopter slant beam component.

[0023] Figure 2 This is a schematic diagram of the positioning shaft structure;

[0024] Figure 3 This is a schematic diagram of the positioning block structure;

[0025] Figure 4 This is a schematic diagram of a converter shaft structure;

[0026] Figure 5 This is a schematic diagram of the two-axis adapter structure;

[0027] Figure 6 This is a schematic diagram of the clamping nut structure;

[0028] Figure 7 This is a schematic diagram of the positioning pin structure;

[0029] Figure 8 This is a schematic diagram of a plate-type nut structure;

[0030] Figure 9 This is a schematic diagram of the pin structure;

[0031] Figure 10 This is a diagram illustrating a usage example.

[0032] Among them: 1-positioning shaft, 2-positioning block, 3-adapter shaft 1, 4-adapter shaft 2, 5-clamping nut, 6-positioning pin, 7-plate nut, 8-pin, 11-stepped shaft, 12-cylindrical pin. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] The features and illustrative embodiments of various aspects of the present invention will now be described in detail. Numerous specific details are set forth in the following detailed description to provide a thorough understanding of the invention. However, it will be apparent to those skilled in the art that the invention may be practiced without requiring some of these specific details. The following description of embodiments is merely intended to provide a better understanding of the invention by illustrating examples of the invention. The invention is by no means limited to any specific setups and methods set forth below, but covers any improvements, substitutions, and modifications to structures, methods, and devices without departing from the spirit of the invention. Well-known structures and techniques are not shown in the drawings and the following description to avoid unnecessarily obscuring the invention.

[0035] It should be noted that, unless otherwise specified, the embodiments of the present invention and the features thereof can be combined with each other, and the various embodiments can be referenced and cited from each other.

[0036] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0037] This invention proposes a cam bracket positioning and installation device for helicopter slant beam components, which replaces the original method of setting the cam bracket positioning structure using the slant beam component assembly fixture. This not only facilitates the external positioning and installation of the cam bracket, but also improves the installation accuracy of the cam bracket.

[0038] The present invention provides a cam bracket positioning and mounting device for a helicopter slant beam component, such as... Figure 1 As shown, the main structural components of the device include positioning shaft 1, positioning block 2, adapter shaft 1 3, adapter shaft 2 4, clamping nut 5, positioning pin 6, plate nut 7, and pin 8.

[0039] like Figure 2As shown, the positioning shaft 1 consists of a stepped shaft 11 and cylindrical pins 12. The stepped shaft 11 is a multi-segment stepped shaft, and the precision requirements of each segment are determined according to the product precision. The middle section of the stepped shaft 11 is assembled with two positioning blocks 2, one end is assembled with the first adapter shaft 3, and the other end is assembled with the second adapter shaft 4, all with shaft hole fits, allowing it to slide along the axis. There are two cylindrical pins 12, which are respectively installed at both ends of the stepped shaft 11 to limit the first adapter shaft 3 and the second adapter shaft 4, preventing the first adapter shaft 3 and the second adapter shaft 4 from falling off.

[0040] like Figure 3 As shown, there are two positioning blocks 2, installed in the middle of the positioning shaft 1. There are relative positional accuracy requirements between the two positioning blocks 2, including requirements for the coaxiality of the holes, the parallelism of the surfaces, and the relative position. These accuracy requirements are achieved by the machining accuracy requirements of the positioning shaft 1 and the positioning blocks 2, and the specific values ​​are determined by the product dimensional tolerances and positional accuracy. The central circular hole on the positioning block 2 has a shaft-hole fit with the positioning shaft 1. The positioning block 2 has three positioning holes, corresponding to the connection holes of the cam support. One circular hole is provided on the side of the positioning block 2. A pin 8 is used to position and fix the positioning block 2 to the positioning shaft 1. The relative positional relationship between the two positioning blocks 2 is determined by the machining accuracy requirements of the positioning shaft 1 and the positioning blocks 2. The combination of the positioning shaft 1 and the two positioning blocks 2 is used for positioning the cam support.

[0041] like Figure 4 As shown, the first adapter shaft 3 is located at the lower end of the positioning shaft 1. It is a sleeve-type stepped shaft, with its outer lower cylindrical section engaging with the joint of the inclined beam. Together with the second adapter shaft 4, it is used for positioning the device on the inclined beam. The first adapter shaft 3 can slide along the axis of the positioning shaft 1. The elongated groove on it allows the first adapter shaft 3 to be limited by the cylindrical pin 12 on the positioning shaft 1. The first adapter shaft 3 has a circular hole that corresponds to the hole on the positioning shaft 1. A pin 8 is used to position and fix the first adapter shaft 3 on the positioning shaft 1.

[0042] like Figure 5 As shown, the adapter shaft 4 is located above the positioning shaft 1 and is a sleeve-type stepped shaft. The upper outer cylindrical section mates with the joint of the inclined beam. Together with the adapter shaft 3, it is used for positioning the device on the inclined beam, and the device is fixed on the inclined beam by tightening the nut 5. The adapter shaft 4 can slide along the axis of the positioning shaft 1. The elongated groove on it allows the adapter shaft 4 to be limited by the cylindrical pin 12 on the positioning shaft 1.

[0043] like Figure 6 As shown, the clamping nut 5 is located below the adapter shaft 4, and its center is a threaded hole, which corresponds to the threaded section on the positioning shaft 1. The threaded structure is used to provide axial thrust, pushing the adapter shaft 4 upward, so that both ends of the device are tightly attached to the inclined beam joint, ensuring the accurate axial position of the cam support.

[0044] like Figure 7 and Figure 8 As shown, there are two locating pins 6 and two plate nuts 7, installed at the three circular holes on the locating block 2. Only one hole needs to be selected for positioning and tightening the cam support. The locating pin 6 is a stepped pin, with a cylindrical locating section in the middle and a threaded section at the bottom, corresponding to the threaded hole on the plate nut 7. The external structure of the locating pin 6 and the plate nut 7 is designed to fit the external structure of the cam support, ensuring operability.

[0045] like Figure 9 As shown, there are 3 pins 8, which are used to position and fix the positioning block 2 and the positioning shaft 1, and the adapter shaft 3 and the positioning shaft 1. They are equipped with tethering holes and are connected to the tethering holes on the positioning shaft 1 by tethering ropes to prevent the pins 8 from being lost when not in use.

[0046] This invention provides a method for using a cam bracket positioning and mounting device for helicopter slant beam components, such as... Figure 10 As shown, upon first use, this device should first be pressed... Figure 1 The assembly is as shown, with pin 8 not inserted and clamping nut 5 tightened to the lower side of the threaded section of positioning shaft 1. In use, first place the cam bracket at positioning block 2 of this device, use two pins 8 to position and fix the two positioning blocks 2 to positioning shaft 1, and use two positioning pins 6 and two plate nuts 7 to position and fix the cam bracket to positioning block 2, thus clamping the cam bracket onto this device. Next, move adapter shaft 3 and adapter shaft 4 towards the middle of positioning shaft 1. Then, place this device on the inclined beam joint for positioning. First, use one pin 8 to position and fix adapter shaft 3 to positioning shaft 1, then tighten clamping nut 5 until adapter shaft 4 is tightly against the inclined beam joint. At this point, the riveting operation between the cam bracket and the inclined beam can be performed. Finally, after completing the riveting operation between the cam bracket and the inclined beam, remove the positioning pin 6 and the plate nut 7, pull out all the pins 8, and screw the clamping nut 5 to the lower side of the threaded section of the positioning shaft 1. Move the first adapter shaft 3 and the second adapter shaft 4 towards the middle of the positioning shaft 1, and the device can be removed. At this point, the assembled state of the device does not require further disassembly and can be used directly for the next use.

[0047] This invention discloses a cam bracket positioning and installation device for helicopter slant beam components. It features a simple structure and convenient operation, effectively positioning and clamping the cam bracket using the slant beam joint hole as a reference, ensuring the cam bracket's installation accuracy. The device facilitates positioning with the slant beam joint, and the main structural components do not require complete disassembly during use, demonstrating excellent usability. This device can be used after the slant beam component has been assembled and removed from the assembly line, offering better operability compared to operations on slant beam assembly fixtures.

[0048] The above description merely illustrates embodiments of the present invention and is quite specific and detailed; however, it should not be construed as limiting the scope of the patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the scope of protection of the present invention. Furthermore, any parts of the present invention not described in detail are conventional techniques.

Claims

1. A cam bracket positioning and mounting device for a helicopter slant beam component, characterized in that, include: Positioning shaft (1), positioning block (2), adapter shaft 1 (3), adapter shaft 2 (4), clamping nut (5), positioning pin (6), plate nut (7), and pin (8). The positioning block (2) is installed in the middle position of the positioning shaft (1). The positioning shaft (1) and the positioning block (2) are used for positioning the cam bracket after being combined. One end of the positioning shaft (1) is assembled with the first adapter shaft (3), and the other end is assembled with the second adapter shaft (4). The first adapter shaft (3) and the second adapter shaft (4) are used together for positioning the device on the inclined beam. The first adapter shaft (3) and the second adapter shaft (4) can slide along the axis on the positioning shaft (1). The clamping nut (5) is located below the second adapter shaft (4). The positioning pin (6) and the plate nut (7) are installed on the positioning block (2). The positioning block (2) and the positioning shaft (1), and the first adapter shaft (3) and the positioning shaft (1) are fixed by the pin (8).

2. The apparatus as claimed in claim 1, characterized in that, The positioning shaft (1) includes a stepped shaft (11) and a cylindrical pin (12); the stepped shaft (11) is a multi-segment stepped shaft; the middle section of the stepped shaft (11) is assembled with the positioning block (2), one end is assembled with the first adapter shaft (3), and the other end is assembled with the second adapter shaft (4), all of which are shaft hole fits and can slide along the axis; the cylindrical pin (12) is installed at both ends of the stepped shaft (11) to limit the first adapter shaft (3) and the second adapter shaft (4) and prevent the first adapter shaft (3) and the second adapter shaft (4) from falling off.

3. The apparatus as described in claim 1, characterized in that, The central hole on the positioning block (2) is in a shaft-hole fit relationship with the positioning shaft (1). The positioning block (2) has multiple positioning holes, which correspond to the connection holes of the cam bracket. The side of the positioning block (2) has one round hole.

4. The apparatus as claimed in claim 1, characterized in that, There are two positioning blocks (2), and the relative positional relationship of the two positioning blocks (2) is determined based on the machining accuracy requirements of the positioning shaft (1) and the positioning blocks (2).

5. The apparatus as claimed in claim 1, characterized in that, The first adapter shaft (3) is located at the lower end of the positioning shaft (1). It is a sleeve-type stepped shaft. The cylindrical section at the lower outer end is matched with the joint of the inclined beam. Together with the second adapter shaft (4), it is used for positioning of this device on the inclined beam. The first adapter shaft (3) can slide along the axis on the positioning shaft (1). The long cylindrical groove provided on it can limit the first adapter shaft (3) to be limited by the cylindrical pin (12) on the positioning shaft (1). A circular hole is provided on the first adapter shaft (3) to correspond to the hole on the positioning shaft (1).

6. The apparatus as claimed in claim 1, characterized in that, The adapter shaft (4) is located at the upper end of the positioning shaft (1). It is a sleeve-type stepped shaft. The upper outer cylindrical section is matched with the joint of the inclined beam, and the device is fixed on the inclined beam by tightening the nut (5). The adapter shaft (4) can slide along the axis on the positioning shaft (1). The elongated groove on it can limit the adapter shaft (4) to be limited by the cylindrical pin (12) on the positioning shaft (1).

7. The apparatus as claimed in claim 1, characterized in that, The clamping nut (5) is located below the adapter shaft (4), and its center is a threaded hole, which corresponds to the threaded section on the positioning shaft (1). The threaded structure provides axial thrust, pushing the adapter shaft (4) upward, so that the two ends of the device are tightly attached to the inclined beam joint.

8. The apparatus as claimed in claim 1, characterized in that, The positioning pin (6) and the plate nut (7) are installed in multiple round holes on the positioning block (2). Only one round hole needs to be selected for positioning and tightening of the cam bracket. The positioning pin (6) is a stepped pin with a cylindrical positioning section in the middle and a threaded section at the bottom, corresponding to the threaded hole on the plate nut (7).

9. The apparatus as claimed in claim 1, characterized in that, The pin (8) has a tethering hole, which is connected to the tethering hole on the positioning shaft (1) by a tethering rope.

10. A method for positioning and installing a cam bracket for a helicopter slant beam component, characterized in that, The method, used in the apparatus of any one of claims 1 to 9, comprises: Place the cam bracket at the positioning block (2) of this device, use the pin (8) to fix the positioning block (2) and the positioning shaft (1), and use the positioning pin (6) and the plate nut (7) to fix the cam bracket and the positioning block (2) to achieve the clamping of the cam bracket on this device; Move the first adapter shaft (3) and the second adapter shaft (4) towards the middle of the positioning shaft (1), and place the device on the inclined beam joint for positioning. First, use the pin (8) to fix the first adapter shaft (3) and the positioning shaft (1) in place. Then, tighten the clamping nut (5) until the second adapter shaft (4) and the inclined beam joint are tightly attached. At this time, the riveting operation between the cam bracket and the inclined beam can be carried out. After completing the riveting operation between the cam bracket and the inclined beam, remove the positioning pin (6) and plate nut (7), pull out all the pins (8), and screw the clamping nut (5) to the lower side of the threaded section of the positioning shaft (1). Move the first adapter shaft (3) and the second adapter shaft (4) towards the middle of the positioning shaft (1) to remove the device.

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