Linear steering engine elastic load test tool

Abstract

The invention provides an elastic load testing tool for a linear steering engine, belongs to the technical field of linear steering engine testing, and solves the problems that a testing tool in the prior art is complex in structure and the load is inconvenient to adjust. The device comprises a load table, at least two first supporting seats are fixedly arranged on the load table, a load shaft is connected between the two first supporting seats in a sliding mode, the load shaft is movably sleeved with an elastic piece, and locking sleeves which are located on the two sides of the elastic piece and make contact with the elastic piece are detachably connected to the load shaft. The locking sleeve is movably sleeved with an abutting assembly capable of adjusting the axial length, one end of the abutting assembly abuts against the elastic piece, and the other end of the abutting assembly abuts against the first supporting base. After the linear steering engine is connected with the load shaft, two load testing modes of pushing and pulling can be realized, and the load can be controlled by increasing or decreasing the number of the elastic pieces or changing the specifications of the elastic pieces, so that the universality of the tool is improved; the tool is simple in structure and convenient to operate.

Description

Technical Field

[0001] The invention belongs to the technical field of linear servo testing, and in particular to a linear servo elastic load testing tool. Background Art

[0002] The electric servo is an actuator that controls the flight attitude of the aircraft. It drives the deflection of the rudder surface by outputting a specified motion through the servo shaft, thereby adjusting the flight attitude of the aircraft. The greater the deflection angle of the rudder surface, the greater the aerodynamic load on the rudder shaft. The servo load can be equivalent to an elastic load. The electric servo plays a very critical role in the flight process, so the test of the electric servo needs to truly and comprehensively simulate the working conditions in the actual use environment.

[0003] At present, for the elastic load test of linear output electric servos, the linear motion is generally converted into rotational motion by using a transmission mechanism, and then the test is performed by using torsion bars, torsion springs, etc. Due to the introduction of transmission mechanisms such as gear racks, the structure of the test tooling is generally more complicated and the reliability is not high; another method is that the servo directly pushes and pulls the compression disc spring assembly for elastic load testing, which requires corresponding tooling design for different working conditions of the servo. The load test range that can be achieved by each set of tooling is small, and the adjustment steps of the disc spring group are more complicated. In view of the above reasons, it is necessary to develop a linear servo elastic load test tooling with a simple structure, a large load range and a simple adjustment method to improve the reliability, operability and versatility of the tooling. Summary of the invention

[0004] In view of the above problems, the purpose of the present invention is to provide a linear servo elastic load testing tool. After the linear servo is connected to the load shaft, two load testing modes, push and pull, can be realized. The size of the load can be controlled by increasing or decreasing the number of elastic parts or changing the specifications of the elastic parts, thereby increasing the versatility of the tool. The tool has a simple structure and is easy to operate.

[0005] The technical solution adopted by the present invention is as follows:

[0006] A linear servo elastic load testing tool comprises a load platform, on which at least two groups of first support seats are fixedly arranged, a load shaft is slidably connected between the two first support seats, an elastic member is movably sleeved on the load shaft, a locking sleeve located on both sides of the elastic member and in contact with the elastic member is detachably connected to the load shaft, an abutment assembly with adjustable axial length is movably sleeved on the locking sleeve, one end of the abutment assembly abuts against the elastic member, and the other end of the abutment assembly abuts against the first support seat.

[0007] Preferably, the abutment assembly comprises an inner sleeve movably sleeved on the locking sleeve, and the outer side of the inner sleeve is threadedly sleeved with an outer sleeve.

[0008] Preferably, the outer circumferences of the end faces of the locking sleeve and the outer sleeve are both polygonal.

[0009] Preferably, the locking sleeve is threadedly connected to the load shaft.

[0010] Preferably, a second support seat for clamping and fixing the linear servo is fixedly provided on the load platform, and an abutment support is also fixedly provided on the load platform, and the abutment support is located on a side of the second support seat away from the load axis.

[0011] Preferably, the first support seat and the second support seat both include a fixing seat, to which a pressing block is detachably connected via a screw, and an arc groove is formed on the lower end surface of the pressing block and the upper end surface of the fixing seat.

[0012] Preferably, the end of the load shaft is hinged with an adapter connected to the linear servo.

[0013] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0014] After the linear servo is connected to the load shaft, two load test modes, push and pull, can be realized. The size of the load can be controlled by increasing or decreasing the number of elastic parts or changing the specifications of the elastic parts, which increases the versatility of the tooling. The abutment assembly can adjust the length according to the length of the elastic part to facilitate the installation and compression of the elastic part. The tooling has a simple structure and is easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0016] Figure 1 A schematic diagram of the main structure provided by an embodiment of the present invention;

[0017] Figure 2 A schematic diagram of a linear servo drive provided in an embodiment of the present invention;

[0018] Figure 3 A schematic diagram of the cooperation between the abutment assembly and the locking sleeve provided in an embodiment of the present invention;

[0019] Figure 4 A schematic diagram of the side view structure of the first support base and the second support base provided in an embodiment of the present invention;

[0020] Figure 5 A schematic diagram of adding an elastic member provided in an embodiment of the present invention.

[0021] Figure markings: 1-load platform; 2-abutment support; 3-linear servo; 4-second support seat; 5-adapter; 6-load shaft; 7-first support seat; 701-pressing block; 702-fixing seat; 703-arc groove; 8-abutment assembly; 801-outer sleeve; 802-inner sleeve; 9-locking sleeve; 10-elastic member. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0023] 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 invention claimed for protection, 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.

[0024] In the description of the present invention, it should be noted that if the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the product of the application is usually placed when used. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0025] Combine the following Figure 1-Figure 5 The present invention is described in detail.

[0026] Example

[0027] A linear servo elastic load testing tool comprises a load platform 1, on which at least two groups of first support seats 7 are fixedly arranged, a load shaft 6 is slidably connected between the two first support seats 7, an elastic member 10 is movably sleeved on the load shaft 6, a locking sleeve 9 located on both sides of the elastic member 10 and in contact with the elastic member 10 is detachably connected to the load shaft 6, an abutment assembly 8 with an adjustable axial length is movably sleeved on the locking sleeve 9, one end of the abutment assembly 8 abuts against the elastic member 10, and the other end of the abutment assembly 8 abuts against the first support seat 7.

[0028] Before testing, the output shaft of the linear servo 3 is connected to the load shaft 6; Figure 1As shown, in the initial state, both ends of the elastic member 10 abut against the abutment assembly 8 and the locking sleeve 9; Figure 2 As shown, when a push load test is performed, the load shaft 6 moves axially to the right, and the locking sleeve 9 on the left side compresses the elastic member 10 as the load shaft 6 moves. At this time, the right end face of the elastic member 10 abuts against the abutment assembly 8 on the right side; conversely, when a pull load test is performed, the load shaft 6 moves axially to the left, and the locking sleeve 9 on the right side compresses the elastic member 10 as the load shaft 6 moves. At this time, the left end face of the elastic member 10 abuts against the abutment assembly 8 on the left side, thereby realizing push and pull load tests.

[0029] The size of the load can be adjusted by increasing or decreasing the number of elastic members 10 or changing the specifications of the elastic members 10. After the number of elastic members 10 is changed, the length of the abutment assembly 8 can be adjusted to maintain the abutment state with the elastic members 10 to ensure the normal progress of the load test.

[0030] The elastic member 10 may be a disc spring, a spring or other forms of elastic devices.

[0031] The abutment assembly 8 comprises an inner sleeve 802 movably sleeved on the locking sleeve 9, and an outer sleeve 801 is threadedly sleeved on the outer side of the inner sleeve 802. By screwing the inner sleeve 802 and the outer sleeve 801 together, the length of the entire abutment assembly 8 can be conveniently adjusted so that one end of the abutment assembly 8 keeps in contact with the first support seat 7 and the other end is in contact with the elastic member 10.

[0032] like Figure 3 As shown, the end surface peripheries of the locking sleeve 9 and the outer sleeve 801 are both polygonal. In the present application, conventional hexagons are adopted, which is convenient for using a wrench to clamp and rotate the locking sleeve 9 and the outer sleeve 801.

[0033] Furthermore, the locking sleeve 9 is threadedly connected to the load shaft 6, so that the locking sleeve 9 can be conveniently adjusted to contact and clamp the elastic members 10 of different lengths. The locking sleeve 9 can limit the rotation of the inner sleeve 802, that is, when the outer sleeve 801 rotates relative to the inner sleeve 802 to adjust the length of the abutment assembly 8, the force exerted on the inner sleeve 802 will cause the locking sleeve 9 to continue to rotate toward the elastic member 10, but the locking sleeve 9 has already abutted against the elastic member 10, and the elastic member 10 can limit the rotation of the locking sleeve 9, thereby ensuring that the inner sleeve 802 slides along the locking sleeve 9 normally.

[0034] The load platform 1 is fixedly provided with a second support seat 4 for clamping and fixing the linear servo 3. The load platform 1 is also fixedly provided with an abutment support 2, which is located on the side of the second support seat 4 away from the load shaft 6. After the end of the linear servo 3 abuts against the abutment support 2, the linear servo 3 can be detachably connected to the abutment support 2 by a screw, and then the linear servo 3 is clamped and fixed by the second support seat 4, thereby ensuring that the linear servo 3 can stably perform push-pull actions and avoid displacement of the linear servo 3.

[0035] like Figure 4 As shown, the first support seat 7 and the second support seat 4 both include a fixed seat 702, and a clamping block 701 is detachably connected to the fixed seat 702 through a screw, and an arc groove 703 is provided on the lower end surface of the clamping block 701 and the upper end surface of the fixed seat 702. The first support seat 7 and the second support seat 4 have the same structure, and the difference is that the size of the arc groove 703 is different, so that the first support seat 7 clamps the load shaft 6 and the second support seat 4 clamps the linear servo 3. The clamping block 701 is connected to the fixed seat 702 from top to bottom. After removing the clamping block 701, the load shaft 6 and the linear servo 3 can be taken out upwards, so as to facilitate the replacement of the elastic member 10 on the linear servo 3 and the load shaft 6.

[0036] The end of the load shaft 6 is hinged with an adapter 5 connected to the linear servo 3. The load shaft 6 and the output end of the linear servo 3 can be quickly connected through the adapter 5.

[0037] Replacement process of the elastic member 10: unscrew the screws on the two first support seats 7 and remove the pressing block 701, take out the load shaft 6 as a whole, pull the abutment components 8 on both sides away from the load shaft 6, unscrew the locking sleeve 9, remove the original elastic member 10 and replace the required elastic member 10; Figure 5 As shown, the length of the elastic member 10 becomes longer, first screw the two locking sleeves 9 onto the load shaft 6 and abut against the two ends of the elastic member 10, then sleeve the abutment assembly 8 on the locking sleeve 9 and install the load shaft 6 on the first support seat 7; finally, screw the outer sleeve 801 so that the outer sleeve 801 contacts the first support seat 7, and the inner sleeve 802 contacts the elastic member 10 to complete the replacement operation; if the length of the elastic member 10 becomes shorter, shorten the length of the abutment assembly 8 in advance and then sleeve it on the locking sleeve 9.

[0038] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A linear servo elastic load test tool, comprising a load table (1), characterized in that: At least two groups of first support seats (7) are fixedly arranged on the load platform (1), a load shaft (6) is slidably connected between the two first support seats (7), an elastic member (10) is movably sleeved on the load shaft (6), a locking sleeve (9) located on both sides of the elastic member (10) and in contact with the elastic member (10) is detachably connected to the load shaft (6), an abutment assembly (8) with an adjustable axial length is movably sleeved on the locking sleeve (9), one end of the abutment assembly (8) abuts against the elastic member (10), and the other end of the abutment assembly (8) abuts against the first support seat (7).

2. A linear servo elastic load test fixture according to claim 1, characterized in that: The abutment assembly (8) comprises an inner sleeve (802) movably sleeved on the locking sleeve (9), and an outer sleeve (801) is threadedly sleeved on the outer side of the inner sleeve (802).

3. The linear servo elastic load test fixture according to claim 2, characterized in that: The outer circumferences of the end faces of the locking sleeve (9) and the outer sleeve (801) are both polygonal.

4. The linear servo elastic load test fixture according to claim 1, characterized in that: The locking sleeve (9) is threadedly connected to the load shaft (6).

5. The linear servo elastic load test fixture according to claim 1, characterized in that: A second support seat (4) for clamping and fixing the linear servo (3) is fixedly arranged on the load platform (1), and an abutment support seat (2) is also fixedly arranged on the load platform (1), and the abutment support seat (2) is located on a side of the second support seat (4) away from the load shaft (6).

6. The linear servo elastic load test fixture according to claim 5, characterized in that: The first support seat (7) and the second support seat (4) both comprise a fixed seat (702), to which a clamping block (701) is detachably connected via a screw, and an arc groove (703) is provided on the lower end surface of the clamping block (701) and the upper end surface of the fixed seat (702).

7. The linear servo elastic load test fixture according to claim 1, characterized in that: The end of the load shaft (6) is hingedly connected with an adapter (5) connected to the linear steering gear (3).

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