Linear actuator elastic load test tooling

Abstract

The application provides a linear steering engine elastic load test tool, and belongs to the technical field of linear steering engine testing. The tool solves the problem of complex structure and inconvenient load size adjustment of the prior art test tool. The tool comprises a load platform, at least two groups of first support seats are fixedly arranged on the load platform, 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 is detachably connected to the load shaft and in contact with the elastic member, an abutting assembly with adjustable axial length is movably sleeved on the locking sleeve, one end of the abutting assembly is in abutment with the elastic member, and the other end of the abutting assembly is in abutment with the first support seat. After the linear steering engine is connected with the load shaft, two load test modes of pushing and pulling can be realized, the load size can be controlled by increasing or decreasing the number of elastic members or changing the specifications of the elastic members, and the universality of the tool is improved. The tool has a simple structure and is convenient to operate.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of linear actuator testing, and particularly relates to a linear actuator elastic load testing tool. BACKGROUND

[0002] An electric actuator is an execution mechanism for controlling the flight attitude of an aircraft, which drives the deflection of a control surface through the output of a specified movement of an actuator shaft, and then adjusts the flight attitude of the aircraft. The greater the deflection angle of the control surface, the greater the aerodynamic load on the actuator shaft, and the actuator load can be equivalent to an elastic load. The electric actuator plays a very key role in the flight process, so the test of the electric actuator needs to truly and comprehensively simulate the working conditions in the actual use environment.

[0003] At present, for the elastic load test of a linear output type electric actuator, a transmission mechanism is generally used to convert linear motion into rotary motion, and then a torsion bar, a torsion spring or the like is used for testing. Since a gear and a rack transmission mechanism is introduced, the structure of the testing tool is generally relatively complex, and the reliability is not high. Another way is to directly push and pull a disc spring assembly for elastic load testing of the actuator, which requires corresponding tool design for different working conditions of the actuator. Each set of tool can realize a smaller load test range, and the adjustment steps of the disc spring assembly are relatively complicated. In view of the above reasons, it is necessary to develop a linear actuator elastic load testing tool with simple structure, large load range and simple adjustment mode, so as to improve the reliability, operability and universality of the tool. SUMMARY

[0004] In view of the above problems, the purpose of the present application is to provide a linear actuator elastic load testing tool. After the linear actuator is connected with the load shaft, two load testing modes of pushing and pulling can be realized, and by increasing or decreasing the number of elastic members or changing the specifications of the elastic members, the size of the load can be controlled, thereby increasing the universality of the tool. The tool has a simple structure and is easy to operate.

[0005] The technical scheme adopted by the present application is as follows:

[0006] A linear actuator elastic load testing tool, comprising a load table, at least two groups of first support seats are fixedly arranged on the load table, 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 is detachably connected to the load shaft and in contact with the elastic member on both sides of the elastic member, an abutting assembly with adjustable axial length is movably sleeved on the locking sleeve, one end of the abutting assembly is in abutment with the elastic member, and the other end of the abutting assembly is in abutment with the first support seat.

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

[0008] Preferably, the end surface periphery of the locking sleeve and the outer sleeve is polygonal.

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

[0010] Preferably, a second support seat for clamping and fixing the linear actuator is fixedly arranged on the load table, and an abutting support is also fixedly arranged on the load table and located on the side of the second support seat away from the load shaft.

[0011] Preferably, the first support seat and the second support seat each comprise a fixed seat, a pressing block is detachably connected to the fixed seat through a screw rod, and an arc-shaped groove is formed in the lower end surface of the pressing block and the upper end surface of the fixed seat.

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

[0013] As described above, the present application has the following advantages:

[0014] After the linear actuator is connected with the load shaft, the two load test modes of pushing and pulling can be realized, the size of the load can be controlled by increasing or decreasing the number of elastic members or changing the specifications of the elastic members, the universality of the tooling is increased, and the length of the abutting assembly can be adjusted according to the length of the elastic member, so as to install and compress the elastic member; the tooling has a simple structure and is convenient to operate. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor.

[0016] Figure 1 The front view structural schematic diagram provided for the embodiments of the present application;

[0017] Figure 2 The linear actuator pushing schematic diagram provided for the embodiments of the present application;

[0018] Figure 3 The abutting assembly and locking sleeve cooperation schematic diagram provided for the embodiments of the present application;

[0019] Figure 4 The side view structural schematic diagram of the first support seat and the second support seat provided for the embodiments of the present application;

[0020] Figure 5 The schematic diagram of increasing elastic members provided for the embodiments of the present application.

[0021] 1-load table; 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-shaped groove; 8-abutment assembly; 801-outer sleeve; 802-inner sleeve; 9-locking sleeve; 10-elastic member. DETAILED DESCRIPTION

[0022] To make the objects, technical solutions and advantages of the embodiments of the present application clearer, the following will be combined with the drawings in the embodiments of the present application to make a clear and complete description of the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings can be arranged and designed in various different configurations.

[0023] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative labor are within the scope of protection of the present application.

[0024] In the description of the present application, it should be noted that if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, or the orientation or positional relationship of the product in use, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0025] The following will be combined Figures 1-5 A detailed description of the present application will be given.

[0026] Embodiments

[0027] A linear servo elastic load test tool, comprising a load table 1, at least two groups of first support seats 7 are fixedly arranged on the load table 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 is detachably connected on the load shaft 6 and in contact with the elastic member 10 on both sides of the elastic member 10, an abutment assembly 8 with 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 with the load shaft 6; for example, Figure 1As shown, in the initial state, both ends of the elastic member 10 abut against the abutting assembly 8 and the locking sleeve 9; as shown in the figure, Figure 2 As shown, when the pushing 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 along with the movement of the load shaft 6, at this time, the right end surface of the elastic member 10 abuts against the abutting assembly 8 on the right side; conversely, when the pulling 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 along with the movement of the load shaft 6, at this time, the left end surface of the elastic member 10 abuts against the abutting assembly 8 on the left side, so as to realize the test of both pushing and pulling loads.

[0029] The size of the load can be increased or decreased by increasing or decreasing the number of elastic members 10 or changing the specifications of the elastic members 10, and after the number of elastic members 10 is changed, the length of the abutting assembly 8 can be adjusted to maintain the abutting state with the elastic members 10 to ensure the normal performance of the load test.

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

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

[0032] As shown, Figure 3 As shown, the end surface of the locking sleeve 9 and the outer sleeve 801 is polygonal. In this application, a regular hexagon is adopted, which facilitates the use of a wrench to hold the locking sleeve 9 and the outer sleeve 801.

[0033] Further, the locking sleeve 9 is threadedly connected with the load shaft 6, so that the locking sleeve 9 can adjust the position to contact and hold the elastic member 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 abutting assembly 8, the force received by the inner sleeve 802 will make the locking sleeve 9 continue to rotate towards the elastic member 10, but the locking sleeve 9 has already abutted against the elastic member 10, which can limit the rotation of the locking sleeve 9, so as to ensure the normal sliding of the inner sleeve 802 along the locking sleeve 9.

[0034] The second support seat 4 for clamping and fixing the linear servo 3 is fixed on the load table 1, and the abutting support 2 is also fixed on the load table 1 and 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 abutting support 2, the linear servo 3 can be detachably connected to the abutting support 2 by a screw rod, and then the linear servo 3 is clamped and fixed by the second support seat 4, so that the linear servo 3 can stably perform a push-pull action and displacement of the linear servo 3 is avoided.

[0035] As shown in Figure 4 The first support seat 7 and the second support seat 4 both include a fixed seat 702, a pressing block 701 is detachably connected to the fixed seat 702 by a screw rod, and an arc-shaped groove 703 is formed in the lower end surface of the pressing block 701 and the upper end surface of the fixed seat 702. The first support seat 7 and the second support seat 4 are consistent in structure, and the difference lies in that the sizes of the arc-shaped grooves 703 are 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 pressing block 701 is connected to the fixed seat 702 from top to bottom, and after the pressing block 701 is removed, the load shaft 6 and the linear servo 3 can be taken out upward, so that the elastic member 10 on the linear servo 3 and the load shaft 6 is conveniently replaced.

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

[0037] The replacement process of the elastic member 10 is as follows: the screw rods on the two first support seats 7 are unscrewed, the pressing blocks 701 are removed, the load shaft 6 is taken out as a whole, the abutting assemblies 8 on both sides are separated from the load shaft 6, the locking sleeves 9 are unscrewed, the original elastic member 10 is removed and the required elastic member 10 is replaced; as shown in Figure 5 The length of the elastic member 10 is lengthened, the two locking sleeves 9 are screwed onto the load shaft 6 and abut against the elastic member 10 at both ends, the abutting assemblies 8 are sleeved on the locking sleeves 9 and the load shaft 6 is installed on the first support seat 7; finally, the outer sleeve 801 is screwed, so that the outer sleeve 801 contacts the first support seat 7 and the inner sleeve 802 contacts the elastic member 10, and the replacement operation is completed; if the length of the elastic member 10 is shortened, the length of the abutting assembly 8 is shortened in advance before being sleeved on the locking sleeve 9.

[0038] The above is only a preferred embodiment of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A straight-line actuator elastic load test tool comprising a load table (1), characterized in that, The load platform (1) is fixedly provided with at least two groups of first support seats (7), two first support seats (7) are slidably connected with a load shaft (6), the elastic member (10) is movably sleeved on the load shaft (6), the lock sleeve (9) is detachably connected on the load shaft (6) and located on both sides of the elastic member (10) and in contact with the elastic member (10), the abutting assembly (8) with adjustable axial length is movably sleeved on the lock sleeve (9), one end of the abutting assembly (8) abuts against the elastic member (10), and the other end of the abutting assembly (8) abuts against the first support seat (7); the abutting assembly (8) comprises an inner sleeve (802) movably sleeved on the lock sleeve (9), and an outer sleeve (801) is threadedly sleeved on the outer side of the inner sleeve (802).

2. The elastic load test tool for a linear actuator according to claim 1, wherein The end face outer periphery of the lock sleeve (9) and the outer sleeve (801) is polygonal.

3. The elastic load test tool of claim 1, wherein, The lock sleeve (9) is threadedly connected with the load shaft (6).

4. The linear actuator elastic load testing tool of claim 1, wherein, The load platform (1) is fixedly provided with a second support seat (4) for clamping and fixing a linear servo (3), and the load platform (1) is further fixedly provided with an abutting support (2), and the abutting support (2) is located on the side, away from the load shaft (6), of the second support seat (4).

5. The linear actuator elastic load testing tool of claim 4, wherein, The first support seat (7) and the second support seat (4) both comprise a fixed seat (702), a pressing block (701) is detachably connected with the fixed seat (702) through a screw rod, and an arc-shaped groove (703) is formed in the lower end face of the pressing block (701) and the upper end face of the fixed seat (702).

6. The linear actuator elastic load testing tool of claim 1, wherein, The end portion of the load shaft (6) is hingedly connected with an adapter (5) connected with the linear servo (3).

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