Positioning clamp for centrifugal switch of air turbine starter

Abstract

The utility model discloses a positioning fixture for a centrifugal switch of an air turbine starter, which relates to the technical field of auxiliary tools of milling machines and comprises a mounting base, a supporting piece, a mounting platform and a limiting component. The limiting assembly is installed on the installation platform and used for locking and limiting the centrifugal switch to be installed. The positioning fixture is reasonable in design, the centrifugal switch is fixed on the positioning fixture, and looseness and size matching deviation of the centrifugal switch during disassembly and assembly are prevented. The mounting platform can support the centrifugal switch during disassembly and assembly, and the mounting base can stabilize the whole positioning clamp, so that the positioning clamp can be stably placed on a table top during use.

Description

Technical Field

[0001] The utility model relates to the technical field of milling machine auxiliary tools, and more specifically to the technical field of positioning fixtures for centrifugal switches of air turbine starters. Background Art

[0002] The air turbine starter is installed on the rear transmission gearbox of the engine and is used for ground starting, cold running and false starting of the engine; the lubricating oil pipe is located on the starter.

[0003] The air turbine starter centrifugal switch can automatically disconnect the starter when the air turbine starter reaches a certain percentage of speed, and automatically shut off the air supply and disconnect the APU generator when the speed reaches a certain percentage to protect the APU.

[0004] When the centrifugal switch of the existing air turbine starter is damaged and needs to be repaired, there is no special auxiliary tooling, which may cause the centrifugal switch to become loose during the repair. Utility Model Content

[0005] The purpose of the utility model is to solve the above technical problems and provide a positioning fixture for a centrifugal switch of an air turbine starter.

[0006] In order to achieve the above-mentioned purpose, the utility model specifically adopts the following technical solutions:

[0007] The utility model provides a positioning fixture for a centrifugal switch of an air turbine starter, comprising a mounting base, a support, a mounting platform and a limit assembly, wherein the mounting platform is located above the mounting base, the mounting platform is fixed on the mounting base through the support, the limit assembly is mounted on the mounting platform and is used for locking and limiting the centrifugal switch to be installed.

[0008] Specifically, the centrifugal switch is fixed on the positioning fixture to prevent the centrifugal switch from loosening and size deviation during disassembly and assembly. The mounting platform can support the centrifugal switch during disassembly and assembly, and the mounting base can stabilize the entire positioning fixture so that the positioning fixture can be stably placed on the desktop when in use.

[0009] In one embodiment, the mounting base is a disc-shaped mounting plate, the supporting member is a supporting cylinder, the center line of the mounting plate coincides with the axis of the supporting cylinder, the cross-sectional area of ​​the supporting cylinder is smaller than the cross-sectional area of ​​the mounting plate, and an auxiliary clamping assembly is provided at the edge of the upper surface of the mounting plate.

[0010] Specifically, the lower part of the support member is assembled in the middle part of the mounting base by interference fit, and the upper part of the support member is formed together with the mounting platform.

[0011] In one embodiment, the auxiliary clamping assembly includes a mounting base that is detachably mounted at the edge of the upper surface of the mounting plate by a bolt assembly, a bottom clamping seat arranged on the mounting base, and a top clamping seat arranged above the bottom clamping seat, the bottom clamping seat cooperates with the top clamping seat and the spacing between the two can be adjusted, and the bottom clamping seat is provided with a plurality of accommodating grooves for standardizing and fixing cables (cables on the air turbine starter to be repaired).

[0012] Specifically, the mounting base can stack a plurality of circular plates of the same thickness or different thicknesses according to the required height, and the plurality of circular plates are locked by a bolt assembly on the bottom clamping seat.

[0013] In one embodiment, the bottom clamping seat is a columnar structure, the bottom of the columnar structure is welded on the mounting base, a threaded hole is provided at the center of the top of the columnar structure, and each receiving groove is distributed on the top of the side wall of the columnar structure and is connected to the threaded hole;

[0014] The top clamping seat comprises a clamping plate at the top and a threaded rod arranged on the clamping plate, the threaded rod cooperates with the threaded hole, and a clamping gap for placing cables is formed between each accommodating groove and the clamping plate.

[0015] In one embodiment, the mounting platform is a square mounting plate with a threaded locking hole reserved thereon, the limit assembly is detachably mounted in the threaded locking hole, and arc chamfers are provided at the four corners of the edge of the square mounting plate.

[0016] In one embodiment, the limiting assembly includes two limiting column components, and the two limiting column components are distributed on two diagonally opposite corners of the square mounting plate.

[0017] Specifically, the centrifugal switch to be installed is fixed by two limiting column components on the positioning fixture, so that the centrifugal switch will not be loosened during disassembly and assembly, and the two limiting column components can play a limiting role.

[0018] In one embodiment, the two limit column components have the same structure. Each limit column component includes a limit column, a positioning screw detachably arranged on the top of the limit column, and a locking assembly sleeved on the positioning screw for locking the centrifugal switch to be installed. The limit column is detachably arranged on the square mounting plate below by a bolt assembly.

[0019] In one embodiment, two cutting surfaces are symmetrically arranged on the side wall of each limiting column, and a corresponding set of cutting surfaces on the two limiting columns is used to press the two side surfaces of the centrifugal switch to be installed.

[0020] In one embodiment, the locking assembly includes a locking nut and an elastic washer.

[0021] In one embodiment, a positioning hole is provided on the top of the limiting column, the positioning screw is locked in cooperation with the positioning hole, and the axis of the limiting column is colinear with the axis of the positioning screw.

[0022] The beneficial effects of the utility model are as follows:

[0023] 1. The utility model has a reasonable design, and fixes the centrifugal switch on the positioning fixture to prevent the centrifugal switch from loosening and size matching deviation during disassembly and assembly. The mounting platform can support the centrifugal switch during disassembly and assembly, and the mounting base can make the entire positioning fixture stable, so that the positioning fixture can be stably placed on the desktop when in use.

[0024] 2. Use the two limiting column components on the positioning fixture to fix the centrifugal switch to be installed, so that the centrifugal switch will not loosen during disassembly and assembly, and the two limiting column components can play a limiting role.

[0025] 3. The mounting base can stack multiple circular plates of the same thickness or different thicknesses according to the required height, and the multiple circular plates are locked by the bolt assembly on the bottom clamping seat. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of the utility model;

[0027] Figure numerals: 1-mounting base, 2-support member, 3-mounting platform, 4-limiting assembly, 5-auxiliary clamping assembly. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0029] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. In addition, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0031] In the description of the embodiments of the present invention, it should be noted that the terms "inside", "outside", "upper", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do 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 on the present invention.

[0032] Example 1

[0033] like Figure 1 As shown, this embodiment provides a positioning fixture for a centrifugal switch of an air turbine starter, including a mounting base 1, a support 2, a mounting platform 3 and a limit assembly 4. The mounting platform 3 is located above the mounting base 1, and the mounting platform 3 is fixed to the mounting base 1 through the support 2. The limit assembly 4 is installed on the mounting platform 3 and is used to lock and limit the centrifugal switch to be installed.

[0034] Specifically, the centrifugal switch is fixed on the positioning fixture to prevent the centrifugal switch from loosening and size matching deviation during disassembly and assembly. The mounting platform 3 can support the centrifugal switch during disassembly and assembly, and the mounting base 1 can make the entire positioning fixture stable, so that the positioning fixture can be stably placed on the desktop when in use.

[0035] Example 2

[0036] like Figure 1 As shown, this embodiment provides a positioning fixture for a centrifugal switch of an air turbine starter, including a mounting base 1, a support 2, a mounting platform 3 and a limit assembly 4. The mounting platform 3 is located above the mounting base 1, and the mounting platform 3 is fixed to the mounting base 1 through the support 2. The limit assembly 4 is installed on the mounting platform 3 and is used to lock and limit the centrifugal switch to be installed.

[0037] The mounting base 1 is a disc-shaped mounting plate, the support member 2 is a supporting cylinder, the center line of the mounting plate coincides with the axis of the supporting cylinder, the cross-sectional area of ​​the supporting cylinder is smaller than the cross-sectional area of ​​the mounting plate, and an auxiliary clamping assembly 5 is provided at the edge of the upper surface of the mounting plate.

[0038] Specifically, the lower part of the support member 2 is assembled in the middle part of the mounting base 1 by means of interference fit, and the upper part of the support member 2 is formed together with the mounting platform 3 .

[0039] Example 3

[0040] like Figure 1 As shown, this embodiment provides a positioning fixture for a centrifugal switch of an air turbine starter, including a mounting base 1, a support 2, a mounting platform 3 and a limit assembly 4. The mounting platform 3 is located above the mounting base 1, and the mounting platform 3 is fixed to the mounting base 1 through the support 2. The limit assembly 4 is installed on the mounting platform 3 and is used to lock and limit the centrifugal switch to be installed.

[0041] The mounting base 1 is a disc-shaped mounting plate, the support member 2 is a supporting cylinder, the center line of the mounting plate coincides with the axis of the supporting cylinder, the cross-sectional area of ​​the supporting cylinder is smaller than the cross-sectional area of ​​the mounting plate, and an auxiliary clamping assembly 5 is provided at the edge of the upper surface of the mounting plate.

[0042] The auxiliary clamping assembly 5 includes a mounting base that is detachably mounted on the edge of the upper surface of the mounting plate by a bolt assembly, a bottom clamping seat arranged on the mounting base, and a top clamping seat arranged above the bottom clamping seat. The bottom clamping seat cooperates with the top clamping seat and the distance between the two can be adjusted. The bottom clamping seat is provided with a plurality of accommodating grooves for standardizing and fixing cables (cables on the air turbine starter to be repaired).

[0043] Specifically, the mounting base can stack a plurality of circular plates of the same thickness or different thicknesses according to the required height, and the plurality of circular plates are locked by a bolt assembly on the bottom clamping seat.

[0044] The bottom clamping seat is a columnar mechanism, the bottom of the columnar mechanism is welded on the mounting base, a threaded hole is arranged at the center of the top of the columnar mechanism, and each accommodating groove is distributed on the top of the side wall of the columnar mechanism and is connected with the threaded hole;

[0045] The top clamping seat comprises a clamping plate at the top and a threaded rod arranged on the clamping plate, the threaded rod cooperates with the threaded hole, and a clamping gap for placing cables is formed between each accommodating groove and the clamping plate.

[0046] Example 4

[0047] This embodiment is further optimized on the basis of any one of Embodiments 1 to 3, specifically:

[0048] The mounting platform 3 is a square mounting plate, on which a threaded locking hole is reserved, and the limit assembly 4 is detachably mounted in the threaded locking hole, and arc chamfers are arranged at the four corners of the edge of the square mounting plate.

[0049] In one embodiment, the limiting assembly 4 includes two limiting column components, and the two limiting column components are distributed on two diagonally opposite corners of the square mounting plate.

[0050] Specifically, the centrifugal switch to be installed is fixed by two limiting column components on the positioning fixture, so that the centrifugal switch will not be loosened during disassembly and assembly, and the two limiting column components can play a limiting role.

[0051] Example 5

[0052] This embodiment is further optimized on the basis of embodiment 4, specifically:

[0053] The two limit column components have the same structure. Each limit column component includes a limit column, a positioning screw detachably arranged on the top of the limit column, and a locking assembly sleeved on the positioning screw for locking the centrifugal switch to be installed. The limit column is detachably arranged on the square mounting plate below by a bolt assembly.

[0054] Two cutting surfaces are symmetrically arranged on the side wall of each limiting column, and a corresponding set of cutting surfaces on the two limiting columns is used to press the two side surfaces of the centrifugal switch to be installed.

[0055] The locking assembly includes a locking nut and an elastic gasket.

[0056] A positioning hole is arranged on the top of the limiting column, the positioning screw is locked in cooperation with the positioning hole, and the axis of the limiting column is colinear with the axis of the positioning screw.

Claims

1. A positioning fixture for a centrifugal switch of an air turbine starter, characterized in that: The invention comprises a mounting base (1), a support member (2), a mounting platform (3) and a limiting assembly (4); the mounting platform (3) is located above the mounting base (1); the mounting platform (3) is fixed to the mounting base (1) via the support member (2); the limiting assembly (4) is mounted on the mounting platform (3) and is used for locking and limiting the centrifugal switch to be installed.

2. A positioning fixture for a centrifugal switch of an air turbine starter according to claim 1, characterized in that: The mounting base (1) is a disc-shaped mounting plate, the support member (2) is a supporting cylinder, the center line of the mounting plate coincides with the axis of the supporting cylinder, the cross-sectional area of ​​the supporting cylinder is smaller than the cross-sectional area of ​​the mounting plate, and an auxiliary clamping assembly (5) is provided at the edge of the upper surface of the mounting plate.

3. A positioning fixture for a centrifugal switch of an air turbine starter according to claim 2, characterized in that: The auxiliary clamping assembly (5) comprises a mounting base detachably mounted on the edge of the upper surface of the mounting plate by means of a bolt assembly, a bottom clamping seat arranged on the mounting base, and a top clamping seat arranged above the bottom clamping seat, wherein the bottom clamping seat cooperates with the top clamping seat and the distance between the two can be adjusted, and the bottom clamping seat is provided with a plurality of receiving grooves for standardizing and fixing cables.

4. A positioning fixture for a centrifugal switch of an air turbine starter according to claim 3, characterized in that: The bottom clamping seat is a columnar structure, the bottom of the columnar structure is welded to the mounting base, a threaded hole is provided at the center of the top of the columnar structure, and each of the accommodating grooves is distributed on the top of the side wall of the columnar structure and is connected to the threaded hole; The top clamping seat comprises a clamping plate at the top and a threaded rod arranged on the clamping plate, the threaded rod cooperates with the threaded hole, and a clamping gap for placing cables is formed between each of the accommodating grooves and the clamping plate.

5. A positioning fixture for a centrifugal switch of an air turbine starter according to claim 1, characterized in that: The mounting platform (3) is a square mounting plate, a threaded locking hole is reserved on the square mounting plate, the limit assembly (4) is detachably mounted in the threaded locking hole, and arc chamfers are arranged at the four corners of the edge of the square mounting plate.

6. A positioning fixture for a centrifugal switch of an air turbine starter according to claim 5, characterized in that: The limiting assembly (4) comprises two limiting column components, and the two limiting column components are distributed on any two diagonally opposite corners of the square mounting plate.

7. A positioning fixture for a centrifugal switch of an air turbine starter according to claim 6, characterized in that: The two limit column components have the same structure. Each limit column component includes a limit column, a positioning screw detachably arranged on the top of the limit column, and a locking assembly sleeved on the positioning screw for locking the centrifugal switch to be installed. The limit column is detachably arranged on the square mounting plate below by a bolt assembly.

8. A positioning fixture for a centrifugal switch of an air turbine starter according to claim 7, characterized in that: Two cutting surfaces are symmetrically arranged on the side wall of each of the limiting columns, and a corresponding set of cutting surfaces on the two limiting columns is used to press the two side surfaces of the centrifugal switch to be installed.

9. A positioning fixture for a centrifugal switch of an air turbine starter according to claim 7, characterized in that: The locking assembly comprises a locking nut and an elastic gasket.

10. A positioning fixture for a centrifugal switch of an air turbine starter according to claim 7, characterized in that: A positioning hole is provided on the top of the limiting column, the positioning screw is locked in cooperation with the positioning hole, and the axis of the limiting column is colinear with the axis of the positioning screw.

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