Device for machining outer circle of eccentric pin of propeller eccentric pin seat

Abstract

The utility model discloses a device for machining the outer circle of an eccentric pin of a propeller eccentric pin seat, which comprises a base used for being connected with machine tool equipment, and the rotating center of the base and the center of a main shaft of a machine tool are coaxially arranged; the positioning table is fixedly connected to the base, one side of the positioning table is close to the center position of the base, a positioning shaft is arranged on the positioning table, and the positioning shaft is connected into a center hole in the eccentric pin seat in a matched mode; the guide seat is fixed on the base, a positioning block for positioning the outer circle of the eccentric pin is connected to the guide seat in a sliding mode, and a positioning head on the positioning block is attached to the outer circle of the eccentric pin and enables the center of the outer circle of the eccentric pin and the center of the base to be coaxial and collinear; the two pressing plate assemblies are connected with the base and distributed on the two sides of the positioning table, the pressing plate assemblies are used for pressing the eccentric pin seat on the positioning table, and the eccentric pin seat machining device is accurate in positioning, convenient and reliable to use and beneficial to improving the machining capacity of the eccentric pin seat.

Description

Technical Field

[0001] The utility model belongs to the technical field of propeller auxiliary accessory processing, and particularly relates to a device for machining the outer circle of an eccentric pin of an eccentric pin seat of a propeller. Background Art

[0002] A propeller is a key component in the power machinery of a turboprop aircraft. As a main component of the propeller, the eccentric pin seat, through an integrated structure welded with the propeller blade, enhances the reliability and interchangeability of the propeller system and realizes the variable pitch of the propeller blade. It provides the maximum power (tensile force or thrust) for the turboprop aircraft.

[0003] Because the outer circle of the eccentric pin on the eccentric pin seat is matched with the thrust bearing in the integrated structure welded with the propeller blade, and it requires high transmission precision, the processing technological process of the outer circle of the eccentric pin is complex and difficult. Due to the special eccentricity structure of the outer circle of the eccentric pin, it cannot be processed by general methods, resulting in the inability to carry out subsequent processes normally.

[0004] The existing machining of the outer circle of the eccentric pin requires using a fixture to position the workpiece. Due to the eccentric characteristics of the eccentric pin, it is not easy to find the correct position during fixture positioning, and the operation is troublesome. Conventional fixtures limit the machining ability of the eccentric pin seat.

[0005] Therefore, how to provide a device for machining the outer circle of an eccentric pin of an eccentric pin seat of a propeller, which is simple to operate, and the outer circle of the processed eccentric pin has accurate and reliable dimensions, is an urgent problem to be solved by those skilled in the art. Content of the Utility Model

[0006] In view of this, the utility model provides a device for machining the outer circle of an eccentric pin of an eccentric pin seat of a propeller, which can accurately position the eccentric pin seat, so that the precision of the machined outer circle of the eccentric pin is high, the clamping is reliable, the operation is simple, and the use is convenient.

[0007] In order to achieve the above purpose, the utility model adopts the following technical scheme: A device for machining the outer circle of an eccentric pin of an eccentric pin seat of a propeller, which comprises:

[0008] A base, the base is used for connecting machine tool equipment, and the rotation center of the base is coaxially arranged with the spindle center of the machine tool;

[0009] A positioning table, the positioning table is fixedly connected to the base, one side of the positioning table is close to the center position of the base, and a positioning shaft is arranged on the positioning table, and the positioning shaft is adaptively connected to the central hole on the eccentric pin seat;

[0010] A guide seat, the guide seat is fixed on the base, and a positioning block for positioning the outer circle of the eccentric pin is slidably connected to the guide seat, and the positioning head on the positioning block is in contact with the outer circle of the eccentric pin and makes the center of the outer circle of the eccentric pin coaxial and collinear with the center of the base;

[0011] A pressure plate assembly, wherein the pressure plate assembly has two groups, the pressure plate assembly is connected to the base and is distributed on both sides of the positioning platform, and the pressure plate assembly is used to press the eccentric pin seat on the positioning platform.

[0012] The beneficial effects of the utility model are as follows: the base is installed on the machine tool equipment, the rotation center of the base is coaxially arranged with the rotation center of the machine tool spindle, the positioning table and the positioning shaft are used to realize the positioning of the eccentric pin seat to prevent it from shaking left and right, and a guide seat and a positioning block are matched, and the positioning block is used to position the outer circle of the eccentric pin so that the outer circle of the eccentric pin is located in the center of the base. When the base rotates, the rotation center of the outer circle of the eccentric pin coincides with the rotation center of the base, which is convenient for machine tool processing, and the pressure plate assembly can firmly limit the eccentric pin seat on the positioning table to ensure the stability of the workpiece during the processing.

[0013] Preferably, the base is a circular base, a counterweight block for balancing the eccentric load force of the eccentric pin seat is connected to the base, and the center of the base is located on the projection line between the center of gravity of the counterweight block and the center of gravity of the eccentric pin seat.

[0014] The resulting technical effect is: since the eccentric pin is an eccentric part, it will generate a very strong eccentric torque when rotating at high speed. The eccentric torque can be balanced by the counterweight block to ensure the stable operation of the base and machine tool equipment.

[0015] Preferably, the positioning platform is a circular structure platform, bolts are connected between the positioning platform and the base, a pin hole is provided on the positioning platform, a positioning hole is coaxially provided on the base corresponding to the pin hole, and positioning pins are installed in the pin hole and the positioning hole.

[0016] The resulting technical effect is that the positioning table is connected to the base through bolts and used in conjunction with the positioning pins to improve the installation accuracy of the positioning table on the base.

[0017] Preferably, the guide seat is connected to the base through bolts and pins, a guide slot is provided on the guide seat, and the positioning block is slidably connected in the guide slot.

[0018] The resulting technical effect is: the guide groove on the guide seat is used to guide the positioning block, so that the positioning block locates the position of the outer circle of the eccentric pin. At this time, the center of the outer circle of the eccentric pin coincides with the center of the base.

[0019] Preferably, the positioning head on the positioning block is a V-shaped head, and the central projection of the V-shaped head is colinear with the central projection of the base and the positioning shaft.

[0020] The resulting technical effect is: the positioning head is a V-shaped head, which can be used to quickly define the center position of the outer circle of the eccentric pin, and the projection refers to the top view projection on the base.

[0021] Preferably, the pressing plate assembly includes a pressing plate, a double-headed stud, a spring, a locking nut, an adjusting support and an adjusting nut. An adjusting slot is provided at one end edge of the pressing plate. The double-headed stud is located in the adjusting slot. One end of the double-headed stud is connected to the screw hole of the base. The locking nut is connected to the other end of the double-headed stud and is located above the pressing plate. The bottom side of one end of the pressing plate is used to press against the eccentric pin seat. The spring is connected to the double-headed stud, and one end of the spring abuts against the bottom side of the pressing plate, and the other end abuts against the base. A clearance hole is provided on the base. The bottom end of the adjusting support is located in the clearance hole. The top end of the adjusting support is connected to the bottom side of the other end of the pressing plate. The adjusting nut is rotatably connected to the adjusting support, and the rotation of the adjusting nut causes the adjusting support to move up and down.

[0022] The resulting technical effects are as follows: The pressing plate can quickly press the eccentric pin seat. The spring provides an upward elastic force for the pressing plate, which can quickly push the pressing plate. The clamping and fixing of the workpiece to be machined are realized by the movement of the pressing plate. At the same time, the elastic force of the spring can also help the pressing plate to automatically lift when needed, which is convenient for loading and unloading the workpiece to be machined and improves work efficiency. The adjusting support can adjust the height. By adjusting the height of the adjusting support, it ensures that the workpiece to be machined remains stable during the machining process, and can also optimize the positioning of the workpiece to be machined, ensuring its stability and accuracy during the machining process.

[0023] Preferably, the top end of the adjusting support is of a T-shaped structure, and a dovetail groove is provided at the other end of the bottom side of the pressing plate. The T-shaped structure on the adjusting support is slidably connected in the dovetail groove.

[0024] The resulting technical effects are as follows: The front and rear positions of the pressing plate can be adjusted, and the position can be adjusted according to different workpieces to be machined.

[0025] Preferably, the eccentric pin seat rotates on the positioning shaft. After the eccentric pin seat rotates to the in-place position, slide the positioning block and make the positioning head fit with the outer circle of the eccentric pin. When machining the outer circle of the eccentric pin, remove the positioning block on the guide seat.

[0026] The resulting technical effects are as follows: In order not to affect the machining of the tool, after the workpiece to be machined is clamped and fixed, the positioning block can be removed, so as not to affect the rotary machining process of the workpiece to be machined. Description of the Drawings

[0027] Figure 1 It is the overall structure diagram of a device for machining the outer circle of the eccentric pin of the eccentric pin seat of a propeller according to the present invention;

[0028] Figure 2 It is the top view of a device for machining the outer circle of the eccentric pin of the eccentric pin seat of a propeller according to the present invention;

[0029] Figure 3 is Figure 2 the sectional view at A-A in the middle;

[0030] Figure 4 is the assembly sectional view of a device for machining the outer circle of the eccentric pin of the propeller eccentric pin seat in the present utility model;

[0031] Figure 5 is the structural diagram of the eccentric pin of the machined part in the present utility model.

[0032] 1 Base, 2 Machine tool equipment, 3 Positioning table, 4 Positioning shaft, 5 Guide seat, 6 Positioning block, 61 Positioning head, 7 Pressure plate assembly, 71 Pressure plate, 72 Stud, 73 Spring, 74 Locking nut, 75 Adjusting support, 76 Adjusting nut, 8 Eccentric pin seat, 81 Central hole, 82 Outer circle of eccentric pin, 9 Bolt, 10 Positioning pin, 11 Adjusting slot hole, 12 Dovetail groove, 13 Counterweight. Specific implementation manners

[0033] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present utility model.

[0034] Refer to the attached drawings of the present utility model Figures 1 to 5 , a device for machining the outer circle of the eccentric pin of the propeller eccentric pin seat according to an embodiment of the present utility model includes:

[0035] Base 1, the base 1 is used to connect the machine tool equipment 2, and the rotation center of the base 1 is coaxially arranged with the spindle center of the machine tool equipment;

[0036] Positioning table 3, the positioning table 3 is fixedly connected to the base 1, one side of the positioning table 3 is close to the center position of the base 1, but the center of the positioning table is not the center of the base. A positioning shaft 4 is provided on the positioning table 3, and the positioning shaft 4 is adaptively connected to the central hole 81 in the eccentric pin seat 8; the function of the positioning shaft 4 is to position the eccentric pin seat and limit the up, down, left, and right movements of the eccentric pin seat;

[0037] Guide seat 5, the guide seat 5 is fixed on the base 1, and a positioning block 6 for positioning the outer circle 82 of the eccentric pin is slidably connected to the guide seat 5. The positioning head 61 on the positioning block 6 is in contact with the outer circle 82 of the eccentric pin and causes the center of the outer circle 82 of the eccentric pin to be collinear with the center of the base 1; the special-shaped positioning head prevents the outer circle of the eccentric pin from freely rotating within 360°;

[0038] The pressing plate assembly 7, there are two sets of pressing plate assemblies 7, the pressing plate assembly 7 is connected to the base 1 and is distributed on both sides of the positioning table 3, and the pressing plate assembly 7 is used to press the eccentric pin seat 8 on the positioning table 3.

[0039] In some other embodiments, the base 1 is a circular base, and a counterweight 13 for balancing the eccentric load of the eccentric pin seat 8 is connected to the base 1. When the device rotates, a centrifugal force will be generated due to the eccentricity of the mass. The purpose of adding the counterweight is to eliminate the vibration caused by the centrifugal force, thereby improving the machining accuracy of the outer circle of the eccentric pin; the center of the base 1 is located on the projection connection line of the center of gravity of the counterweight 13 and the center of gravity of the eccentric pin seat. The projection refers to the projection on the base, and the purpose is to place the center of gravity of the counterweight and the center of gravity of the eccentric pin seat in a reference system for comparison.

[0040] In some other embodiments, the positioning table 3 is a circular structural table, a bolt 9 is connected between the positioning table 3 and the base 1, a pin hole is provided on the positioning table 3, and a positioning hole is coaxially provided on the base 1 corresponding to the pin hole, and a positioning pin 10 is installed in the pin hole and the positioning hole.

[0041] In some other embodiments, the guide seat 5 is connected to the base 1 by bolts and pins, a guide chute is provided on the guide seat 5, and the positioning block 6 is slidably connected in the guide chute.

[0042] In some other specific embodiments, the positioning head 61 on the positioning block 6 is a V-shaped head, and the central projection of the V-shaped head is collinear with the central projections of the base and the positioning shaft.

[0043] In some other embodiments, the pressing plate assembly 7 includes a pressing plate 71, a stud 72, a spring 73, a locking nut 74, an adjusting support 75 and an adjusting nut 76. An adjusting slot hole 11 is opened at one end edge of the pressing plate 71, the stud 72 is located in the adjusting slot hole 11, one end of the stud 72 is connected in the screw hole of the base, the locking nut 74 is connected to the other end of the stud 72 and is located above the pressing plate 71, one end bottom side of the pressing plate 71 is used to press against the eccentric pin seat 8, the spring 73 is connected to the stud 72 and one end thereof abuts against the bottom side of the pressing plate 71, and the other end abuts against the base; a relief hole is provided on the base 1, the bottom end of the adjusting support 75 is located in the relief hole, the top end of the adjusting support 75 is connected to the bottom side of the other end of the pressing plate 71, the adjusting nut 76 is rotatably connected to the adjusting support 75, and the rotation of the adjusting nut 76 causes the adjusting support 75 to move up and down.

[0044] In some other specific embodiments, the top end of the adjusting support 75 is a T-shaped structure, a dovetail groove 12 is provided on the bottom side of the other end of the pressing plate 71, and the T-shaped structure on the adjusting support 75 is slidably connected in the dovetail groove 12, and the lateral position of the pressing plate can be adjusted according to the sizes of different parts to be machined.

[0045] In some other embodiments, the eccentric pin seat 8 rotates on the positioning shaft 4. After the eccentric pin seat rotates to the in-place position, slide the positioning block to make the positioning head 61 fit against the outer circle 82 of the eccentric pin. When machining the outer circle of the eccentric pin, remove the positioning block on the guide seat.

[0046] Specific machining process:

[0047] First, connect the base 1 to the machine tool equipment 2 to ensure that the rotation center of the device coincides with the spindle center of the machine tool equipment. Place the center hole 81 on the eccentric pin seat 8 onto the positioning shaft 4. At this time, the eccentric pin seat 8 cannot move up, down, left, or right, achieving the centering and positioning of the eccentric pin seat. After positioning, let the eccentric pin seat make a 360° rotational movement along the positioning shaft 4. When it rotates to the rotation center position of the device, slide the positioning block 6 downward along the groove on the guide seat 5 to make the V-shaped positioning head slide to the outer circle of the eccentric pin and fit closely in contact. Then, use pressing mechanisms such as the pressing plate 71, spring 73, stud 72, and adjusting support 75 to press the eccentric pin seat tightly. After clamping, when machining the part, since the V-shaped positioning head 61 fits closely against the outer circle 82 of the eccentric pin, it will cause the V-shaped positioning head to collide with the machine tool cutter. Therefore, the positioning block 6 must be removed. After these operations are completed, the machining process of the outer circle of the eccentric pin of the eccentric pin seat can be carried out.

[0048] For the device and usage method disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple. For related parts, refer to the description in the method section.

[0049] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present utility model. Various modifications to these embodiments will be obvious to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present utility model. Therefore, the present utility model will not be limited to these embodiments shown herein, but rather will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A device for machining the outer circle of an eccentric pin of a propeller eccentric pin seat, characterized in that Comprising: A base (1) for connecting a machine tool device (2), wherein the rotation center of the base (1) is coaxially arranged with the spindle center of the machine tool device; A positioning table (3) fixedly connected to the base (1), with one side of the positioning table (3) close to the center position of the base (1). A positioning shaft (4) is provided on the positioning table (3), and the positioning shaft (4) is adaptively connected to a central hole (81) on an eccentric pin seat (8); A guide seat (5) fixed on the base (1), and a positioning block (6) for slidingly connecting to the outer circle (82) of a positioning eccentric pin is arranged on the guide seat (5). A positioning head (61) on the positioning block (6) abuts against the outer circle (82) of the eccentric pin and causes the center of the outer circle (82) of the eccentric pin to be coaxial and collinear with the center of the base (1); A pressing plate assembly (7), having two groups, connected to the base (1) and distributed on both sides of the positioning table (3), and the pressing plate assembly (7) is used to press the eccentric pin seat (8) on the positioning table (3).

2. The device for machining the outer circle of the eccentric pin of the propeller eccentric pin seat according to claim 1, characterized in that, The base (1) is a circular base, and a counterweight block (13) for balancing the eccentric load of the eccentric pin seat (8) is connected to the base (1). The center of the base (1) is located on the projection connection line between the center of gravity of the counterweight block (13) and the center of gravity of the eccentric pin seat.

3. A device for machining the outer circle of an eccentric pin of an eccentric pin seat of a propeller according to claim 1, characterized in that, The positioning table (3) is a circular structural table, and a bolt (9) is connected between the positioning table (3) and the base (1). A pin hole is provided on the positioning table (3), and a positioning hole is coaxially provided on the base (1) corresponding to the pin hole. A positioning pin (10) is installed in the pin hole and the positioning hole.

4. A device for machining the outer circle of an eccentric pin of an eccentric pin seat of a propeller according to claim 1, characterized in that, The guide seat (5) is connected to the base (1) by bolts and pins. A guide chute is provided on the guide seat (5), and the positioning block (6) is slidably connected in the guide chute.

5. A device for machining the outer circle of an eccentric pin of a propeller eccentric pin seat according to claim 4, characterized in that, The positioning head (61) on the positioning block (6) is a V-shaped head, and the central projection of the V-shaped head is collinear with the central projections of the base and the positioning shaft.

6. A device for machining the outer circle of an eccentric pin of a propeller eccentric pin seat according to claim 1, characterized in that, The pressing plate assembly (7) includes a pressing plate (71), a stud (72), a spring (73), a locking nut (74), an adjusting support (75) and an adjusting nut (76). An adjusting slot hole (11) is formed at one end edge of the pressing plate (71). The stud (72) is located in the adjusting slot hole (11). One end of the stud (72) is connected to the screw hole in the base. The locking nut (74) is connected to the other end of the stud (72) and is located above the pressing plate (71). One end bottom side of the pressing plate (71) is used to press against the eccentric pin seat (8). The spring (73) is connected to the stud (72), one end of which abuts against the bottom side of the pressing plate (71), and the other end abuts against the base. A relief hole is provided on the base (1). The bottom end of the adjusting support (75) is located in the relief hole. The top end of the adjusting support (75) is connected to the bottom side of the other end of the pressing plate (71). The adjusting nut (76) is rotatably connected to the adjusting support (75). The rotation of the adjusting nut (76) causes the adjusting support (75) to move up and down.

7. A device for machining the outer circle of an eccentric pin of an eccentric pin seat of a propeller according to claim 6, characterized in that, The top end of the adjusting support (75) is of a T-shaped structure. A dovetail groove (12) is provided at the other end of the bottom side of the pressing plate (71). The T-shaped structure on the adjusting support (75) is slidably connected in the dovetail groove (12).

8. A device for machining the outer circle of an eccentric pin of a propeller eccentric pin seat according to claim 1, characterized in that, The eccentric pin seat (8) rotates on the positioning shaft (4). After the eccentric pin seat rotates into place, slide the positioning block to make the positioning head (61) fit with the outer circle of the eccentric pin (82). When machining the outer circle of the eccentric pin, remove the positioning block on the guide seat.

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