Coupling stop spring installation angle adjustment method and indicator tool

Abstract

The present invention discloses a method for adjusting the installation angle of a coupling stop block spring and an indicating tool. The indicating tool includes a bracket, a locking screw, a dial, a pressure plate, a pin, a washer, a nut, a locking ring, and a screw. When in use, the bracket is placed on the coupling housing through the first positioning hole, and the bracket and the coupling housing are fixed by the locking screw, the washer, and the nut. The dial is rotated so that the zero scale on the scale line is aligned with the initial position of the stop block spring on the coupling. The coupling shaft is then rotated so that the stop block spring is aligned with the angle specified in the design drawing. An engagement debugging test is then performed, and the above steps are repeated until the debugging test passes. The present invention intuitively reflects the spring installation angle, improves assembly efficiency, and avoids the risk factors caused by manual calculation in the traditional adjustment method.

Description

Technical Field

[0001] The invention belongs to the technical field of aero-engine processing, and in particular relates to an aero-engine coupling spring installation angle adjustment method and an indicating tool. Background Art

[0002] like Figures 1 to 3 As shown, during the assembly of an aircraft engine, the coupling consists of a coupling housing 101, a coupling shaft 102, a stopper spring 103, and a stopper 104. The stopper 104 of the coupling needs to engage with the turbine starter at a specific speed requirement, and during engagement, it is necessary to ensure that the stopper spring 103 in the coupling remains within a specified angle range. Therefore, during assembly and commissioning of the coupling, the installation angle of the stopper spring 103 needs to be repeatedly adjusted. Currently, there is no dedicated adjustment indicator tool, and workers mainly rely on recording the number of keyway teeth on the coupling shaft 102 to reflect the installation angle of the stopper spring 103. This method requires converting the number of teeth on the coupling shaft 102 into an angle to determine the installation angle of the stopper spring 103. The adjustment process is cumbersome, non-intuitive, inefficient, and there is a risk of counting errors. Summary of the Invention

[0003] The present invention aims to provide a coupling stop block spring installation angle adjustment method and indicator tool, which can intuitively reflect the spring installation angle, improve assembly efficiency, and avoid the risk factors caused by manual calculation in traditional adjustment methods.

[0004] To achieve the above object, the present invention adopts the following technical solutions:

[0005] The method for adjusting the installation angle of the coupling stop block spring includes:

[0006] Install a dial that is coaxial with the coupling shaft and can rotate relative to the coupling shaft. The surface of the dial that is perpendicular to the rotation axis of the dial is marked with an angle scale. When adjusting the stop block spring, keep the coupling shaft stationary, then rotate the dial a specified angle so that the initial position of the stop block spring is aligned with the zero scale of the angle scale, then rotate the coupling shaft to drive the stop block spring to reach the lower limit of the design angle, and then perform the coupling engagement debugging test. If the test passes, the adjustment of the stop block spring is completed. If the test fails, rotate the dial again and use the position of the stop block spring at this time as the zero scale of the dial. Rotate the coupling shaft to drive the stop block spring to the next angle value within the design angle range, and then perform the coupling engagement debugging test. Repeat the above steps until the test passes.

[0007] Furthermore, in order to save the trouble of disassembling the dials and adjusting them one by one, there are multiple dials, each dial corresponds to a coupling shaft, and different dials are independent of each other, and the installation angles of multiple stop block springs are adjusted at one time.

[0008] Indicator tool for adjusting the installation angle of the coupling stop spring, including:

[0009] A bracket, wherein the bracket is provided with at least one first positioning hole for the coupling shaft, which passes through the upper and lower end surfaces of the bracket, the inner diameter of the first positioning hole is greater than or equal to the outer diameter of the coupling shaft, and one end surface of the first positioning hole forms a table seat. The bracket is also provided with an annular groove, teeth and a through hole, the annular groove is coaxial with the first positioning hole and is located outside the first positioning hole, the teeth are distributed on the outer surface of the bracket between the table seat and the annular groove, a plurality of the teeth are located on a cylindrical surface with the axis of the first positioning hole as the axis, and the through hole passes through the upper and lower end surfaces of the bracket and is coaxial with the first positioning hole;

[0010] The dial is an annular member and is rotatably connected to the bracket. The rotating shaft of the dial coincides with the axis of the first positioning hole. A positioning ring groove is provided on the lower end surface of the dial. The top surface of the positioning ring groove is placed on the dial base. A locking ring groove is provided on the outer ring surface of the dial. The groove wall of the locking ring groove is provided with at least one pin hole that penetrates the groove wall of the positioning ring groove. The upper end surface of the dial is also provided with engraved lines and scales. The engraved lines and scales are distributed on a circular surface perpendicular to the axis of the dial, and the scales are central angle scales.

[0011] A pressure plate connected to the lower end surface of the dial, the pressure plate comprising at least one annular protrusion, the annular protrusion being inserted into the positioning ring groove;

[0012] The pin and the lock ring are slidably connected in the pin hole of the lock ring groove, the lock ring is placed in the lock ring groove, and one end of the pin is in close contact with the tooth, and the other end of the pin is in close contact with the inner ring of the lock ring.

[0013] Furthermore, the indicating tool also includes a locking screw and a nut, wherein the locking screw is inserted into the through hole of the bracket, the locking screw includes a head and a threaded section, the outer diameter of the head is larger than the inner diameter of the through hole, and the nut is sleeved on the threaded section of the locking screw.

[0014] Furthermore, both ends of the first positioning hole are chamfered, and the groove wall of the positioning ring groove includes a tapered surface, and the taper of the tapered surface is consistent with the chamfer angle of the first positioning hole.

[0015] Furthermore, the dial is connected to the pressing plate via screws.

[0016] Furthermore, the pressing plate is a half-circular ring.

[0017] Furthermore, there is a pair of pin holes on the dial, and the pin holes are distributed on a straight line passing through the center of the dial.

[0018] Furthermore, the pin includes a limiting groove and a protrusion separated at both ends of the pin, the locking ring is located in the limiting groove, and the protrusion is in close contact with the teeth.

[0019] Furthermore, the center angle between two adjacent teeth is equal to the center angle between two adjacent splines on the coupling shaft.

[0020] Compared with the prior art, when using the indicating tool of the present invention for installation and debugging of an aircraft engine, the adjustment of the coupling spring installation angle is more intuitive, the adjustment efficiency of the coupling spring installation angle is improved, the risk of coupling debugging errors is avoided, and quality risks are eliminated. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is the main view of the coupling;

[0022] Figure 2 It is the top view of the coupling;

[0023] Figure 3 It is the cross-sectional view of coupling BB;

[0024] Figure 4 It is a front view of the structure of the present invention;

[0025] Figure 5 AA sectional view of the structure of the present invention;

[0026] Figure 6 BB is a cross-sectional view of the structure of the present invention;

[0027] Figure 7 This is a front view of the bracket of the present invention;

[0028] Figure 8 A top view of the bracket of the present invention;

[0029] Figure 9 This is an enlarged view of a tooth portion U of the bracket of the present invention;

[0030] Figure 10 This is a front view of the dial of the present invention;

[0031] Figure 11 is a top view of the dial of the present invention;

[0032] Figure 12 AA sectional view of the dial of the present invention;

[0033] Figure 13 It is a front view of the pressing plate of the present invention;

[0034] Figure 14 A top view of the pressing plate of the present invention;

[0035] Figure 15 This is a schematic diagram of the pin structure of the present invention;

[0036] In the figure, 1-bracket, 1a-base, 1b-first positioning hole, 1c-ring groove, 1d-tooth, 2-locking screw, 3-dial, 3a-positioning ring groove, 3b-locking ring groove, 3c-scale, 3d-scale, 3e-pin hole, 4-pressure plate, 5-pin, 5a-limiting groove, 5b-protrusion, 6-washer, 7-nut, 8-locking ring, 9-screw, 101-coupling housing, 102-coupling shaft, 103-stop block spring, 104-stop block. DETAILED DESCRIPTION

[0037] The present invention is further described below with reference to the accompanying drawings and specific embodiments. However, it should not be understood that the scope of the subject matter described in the present invention is limited to the following embodiments. Without departing from the above technical ideas of the present invention, various modifications, substitutions and changes made according to common technical knowledge and customary means in the field are included in the scope of the present invention.

[0038] like Figures 4 to 15 As shown in FIG. 1 , a coupling stopper spring installation angle adjustment indicator tool designed in this embodiment includes a bracket 1, a locking screw 2, a dial 3, a pressure plate 4, a pin 5, a washer 6, a nut 7, a locking ring 8, and a screw 9. Figure 5 and Figure 6 The pin 5 is restricted in the pin hole 3e of the dial 3 by the locking ring 8, and the dial 3 is rotatably connected to the bracket 1 after being assembled with the screw 9 and the pressure plate 4.

[0039] like Figures 6 to 9 Three evenly distributed (at intervals of 120° on a circle at a center angle) stop block adjustment indicating units are designed on the bracket 1. Each adjustment indicating unit includes a dial base 1a, a first positioning hole 1b, an annular groove 1c and a tooth 1d. The dial base 1a is an annular boss for assembling the dial 3. The first positioning hole 1b is used to locate the coupling shaft 102, the stop block spring 103 and the stop block 104 on the coupling housing 101. The annular groove 1c is used to install the pressure plate 4 so that the dial 3 can rotate on the bracket 1 (that is, the annular groove 1c serves as a guide groove and the pressure plate 4 serves as a guide rail). The number of teeth 1d corresponds to the number of splines on the coupling shaft 102, which can be equal or in a multiple relationship, thereby corresponding to the scale 3d on the dial 3.

[0040] like Figure 4 , the locking screw 2, washer 6 and nut 7 are combined to fix the bracket 1 on the coupling housing 101. First, in addition to the three evenly distributed stop block adjustment indicator units on the bracket 1, a through hole is opened at the center of the three stop block adjustment indicator units. The locking screw 2 is inserted into the through hole. The outer diameter of one end of the locking screw 2 is larger than the inner diameter of the through hole, which is used to limit the position of the locking screw 2. The other end of the locking screw 2 has an external thread on the surface for installing the nut 7. Figure 1Place the bracket 1 on the upper surface of the coupling housing 101, and ensure that the first positioning hole 1b on the bracket 1 is aligned with the position of the coupling shaft 2 on the coupling housing 101. Then insert the locking screw 2 from top to bottom at the through hole of the bracket 1 until the external thread section of the locking screw 2 passes through the hole at the lower end of the coupling housing 101 ( Figure 1 At this time, the washer 6 is inserted into the locking screw 2 and the nut 7 is screwed in until the nut 7 presses the washer 6 against the lower end surface of the coupling housing 101, thus completing the locking installation between the coupling 1 and the coupling housing 101.

[0041] Then install the dial 3, which is designed with a positioning ring groove 3a, a lock ring groove 3b, a scale line 3c, a scale 3d and a pin hole 3e. Figure 5 and Figure 10 The positioning ring groove 3a is used to cooperate with the table base 1a of the bracket 1 for positioning. The annular cross-section of the positioning ring groove 3a is trapezoidal, which matches the chamfer of the first positioning hole 1b and the upper end surface of the table base 1a; the lock ring groove 3b is used to assemble the lock ring 8, the engraved line 3c and the scale 3d are used to indicate the angle, and the pin hole 3e is used to assemble the pin 5, such as Figure 6 There are two pin holes 3e, and they are located on a diameter line.

[0042] like Figure 13 and Figure 14 The pressure plate 4 is an intermediate piece for the dial 3 to rotate around the bracket 1. It is designed in the form of a semicircular ring and is installed in the ring groove 1c of the bracket 1. On the one hand, it limits the axial position of the dial 3 to prevent the dial 3 from escaping (the radial direction of the dial 3 is limited by the positioning ring groove 3a and the first positioning hole 1b). On the other hand, it acts as a guide to rotate in the ring groove 1c. When installing, the pressure plate 4 is installed as follows Figure 10 The vertical holes on the dial 3 shown are adapted to fit screws 9 connected to the dial 3 .

[0043] like Figure 15 The pin 5 is designed with a limiting groove 5a and a protrusion 5b. The limiting groove 5a is used to install the locking ring 8. The inner circular surface of the locking ring 8 is used to limit the pin 5 in the pin hole 3e, and the protrusion 5b is clamped into the tooth 1d in the bracket 1 under the action of the locking ring 8.

[0044] When assembling the indicating tool, the pin 5 is inserted into the pin hole 3e in the dial 3, and the locking ring 8 is installed in the ring groove 3b of the dial 3. At the same time, the locking ring 8 engages the retaining groove 5a of the pin 5. The dial 3 is then installed into the bracket 1 through the retaining ring groove 3a. The protrusion 5b at one end of the pin 5 is engaged by the locking ring 8 and engaged with the teeth 1d of the bracket 1. In the absence of external force, the protrusion 5b of the pin 5 cannot be removed from the teeth 1d of the bracket 1, thereby fixing the relative position of the dial 3. When an external force drives the dial 3 to rotate relative to the bracket 1, the protrusion 5b of the pin 5 jumps from one tooth 1d to the next, and is again restrained by the elastic deformation force of the locking ring 8 until the external force is applied again.

[0045] During use, the bracket 1 is placed on the coupling through the first positioning hole 1b, and the bracket 1 and the coupling housing 101 are fixed by the locking screw 2, washer 6, and nut 7 (that is, the coupling housing 101 is clamped between the bracket 1 and the nut 7). The dial 3 is rotated so that the zero scale on the scale line 3c is aligned with the initial position of the stop block spring 103 on the coupling, and then the coupling shaft 102 is rotated so that the stop block spring 103 of the coupling is aligned with the lower limit of the angle range specified in the design drawing. Then the indicating tool is removed and the coupling is subjected to an engagement debugging test. If the debugging result does not meet the requirements, the indicating tool is clamped again and the scale of the dial 3 is reset. At this time, there are two options. One is to use the previous angle as the zero scale, and the other is to use the position of the stop block spring 103 in the unstressed state as the zero scale, and then rotate the coupling shaft 102 so that the stop block spring 103 of the coupling is aligned with the next test scale within the angle range specified in the design drawing. This is repeated until the coupling is debugged and qualified.

[0046] Any matters not described in detail in the present specification are prior art known to those skilled in the art. Although the above description of the present invention is based on illustrative embodiments to facilitate understanding of the present invention by those skilled in the art, it should be understood that the present invention is not limited to the scope of the specific embodiments. As long as various modifications are within the spirit and scope of the present invention as defined and determined by the appended claims, such modifications will be obvious to those skilled in the art, and all inventions and creations utilizing the concepts of the present invention are protected.

Claims

1. The method for adjusting the installation angle of the coupling stop block spring is characterized by: include, A dial (3) is installed which is coaxial with the coupling shaft (102) and can rotate relative to the coupling shaft (102). An angle scale is marked on the surface of the dial (3) which is perpendicular to the rotation axis of the dial (3). When adjusting the stop block spring (103), the coupling shaft (102) is kept stationary, and then the dial (3) is rotated by a specified angle so that the initial position of the stop block spring (103) is aligned with the zero scale of the angle scale. Then, the coupling shaft (102) is rotated to drive the stop block spring (103) to move. ) reaches the lower limit of the design angle, and then the coupling engagement debugging test is carried out. If the test passes, the adjustment of the stop block spring (103) is completed. If the test fails, the dial (3) is rotated again and the position of the stop block spring (103) at this time is used as the zero scale of the dial (3). The coupling shaft (102) is rotated to drive the stop block spring (103) to reach the next angle value within the design angle range, and then the coupling engagement debugging test is carried out. The above steps are repeated until the test passes.

2. The method for adjusting the installation angle of the coupling stopper spring according to claim 1, characterized in that: There are multiple dials (3), each dial (3) corresponds to a coupling shaft (102), and different dials (3) are independent of each other, and the installation angles of multiple stop block springs (103) are adjusted at one time.

3. An indicator tool for adjusting the installation angle of the coupling stop spring, characterized by: include, A bracket (1), wherein the bracket (1) is provided with at least one first positioning hole (1b) for a coupling shaft (102) and penetrating the upper and lower end surfaces of the bracket (1), the inner diameter of the first positioning hole (1b) is greater than or equal to the outer diameter of the coupling shaft (102), and one end surface of the first positioning hole (1b) forms a table seat (1a), and the bracket (1) is further provided with an annular groove (1c), teeth (1d) and a through hole, the annular groove (1c) is coaxial with the first positioning hole (1b) and is located outside the first positioning hole (1b), the teeth (1d) are distributed on the outer surface of the bracket (1) between the table seat (1a) and the annular groove (1c), and a plurality of the teeth (1d) are located on a cylindrical surface with the axis of the first positioning hole (1b) as the axis, and the through hole penetrates the upper and lower end surfaces of the bracket (1) and is coaxial with the first positioning hole (1b); The dial (3) is an annular member and is rotatably connected to the bracket (1). The rotating shaft of the dial (3) coincides with the axis of the first positioning hole (1b). A positioning ring groove (3a) is provided on the lower end surface of the dial (3). The top surface of the positioning ring groove (3a) is placed on the dial base (1a). A locking ring groove (3b) is provided on the outer ring surface of the dial (3). At least one pin hole (3e) is formed on the wall of the locking ring groove (3b) and penetrates the wall of the positioning ring groove (3a). The upper end surface of the dial (3) is also provided with engraved lines (3c) and scales (3d). The engraved lines (3c) and scales (3d) are distributed on a circular surface perpendicular to the axis of the dial (3), and the scales (3d) are central angle scales. A pressure plate (4), the pressure plate (4) being connected to the lower end surface of the dial (3), the pressure plate (4) comprising at least one section of annular protrusion, the annular protrusion being inserted into the positioning ring groove (3a); A pin (5) and a locking ring (8), wherein the pin (5) is slidably connected to a pin hole (3e) of a locking ring groove (3b), and the locking ring (8) is placed in the locking ring groove (3b), and one end of the pin (5) is in close contact with the tooth (1d), and the other end of the pin (5) is in close contact with the inner ring of the locking ring (8).

4. The indicating tool according to claim 3, wherein: It also includes a locking screw (2) and a nut (7), wherein the locking screw (2) is inserted into the through hole of the bracket (1), the locking screw (2) includes a head and a threaded section, the outer diameter of the head is larger than the inner diameter of the through hole, and the nut (7) is sleeved on the threaded section of the locking screw (2).

5. The indicating tool according to claim 3, wherein: Both ends of the first positioning hole (1b) are chamfered, and the groove wall of the positioning ring groove (3a) includes a conical surface, the taper of the conical surface is consistent with the chamfer angle of the first positioning hole (1b).

6. The indicating tool according to claim 3, wherein: The dial (3) is connected to the pressing plate (4) via screws (9).

7. The indicating tool according to claim 3, wherein: The pressing plate (4) is a half-circular ring piece.

8. The indicating tool according to claim 3, wherein: There is a pair of pin holes (3e) on the dial (3), and the pin holes (3e) are distributed on a straight line passing through the center of the dial (3).

9. The indicating tool according to claim 3, wherein: The pin (5) comprises a limiting groove (5a) and a protrusion (5b) separated at both ends of the pin (5); the locking ring (8) is located in the limiting groove (5a); and the protrusion (5b) is in close contact with the tooth (1d).

10. The indicating tool according to claim 3, wherein: The center angle between two adjacent teeth (1d) is equal to the center angle between two adjacent splines on the coupling shaft (102).

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