Position measurement system and actuation system

Abstract

The present invention discloses a position measurement system, comprising a position sensing end connected to a piston rod and capable of moving axially along the piston rod with the piston rod; a position measuring end connected to a cylinder body and used to measure the distance between the position sensing end and the position sensing end; a guide device connected to the position sensing end and the piston rod and capable of causing the position sensing end to rotate relative to the piston rod; the application of the position measurement system of the present invention can effectively reduce the wear of the position sensing end, and the present invention also provides an actuation system.

Description

Technical Field

[0001] The present invention relates to the field of servo actuation systems, and in particular to a position measurement system and an actuation system having the same. Background Art

[0002] In existing flight simulator actuators, the piston rod not only needs to perform telescopic motion, but also needs to perform rotational motion relative to the cylinder's axial direction. Therefore, the traditional flight simulator actuator position sensor mechanism is installed at the axial center position inside the cylinder. Since a large amount of heat is generated during the extension and retraction of the piston rod, the position sensor located inside the actuator will produce a temperature rise, resulting in an increased failure rate of the position sensor.

[0003] To this end, the existing technology proposes a position sensor for the actuator, which is located on the outside of the actuator cylinder, and the position sensing end corresponding to the position sensor is fixedly connected to the piston rod; since the piston rod of the flight simulator actuator not only extends and retracts in the cylinder body, but also rotates, the position sensing end is affected by the rotation of the piston rod and will produce eccentric friction with the track, affecting the measurement. Summary of the Invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a position measurement system and an actuation system having the same, which can reduce the eccentric sliding of the position sensing end when the piston rod rotates.

[0005] According to a first aspect of the present invention, a position measurement system includes: a position sensing end connected to a piston rod and capable of moving axially along the piston rod with the piston rod; a position measuring end connected to a cylinder body and used to measure the distance between the position sensing end and the position sensing end; and a guide device connected to the position sensing end and the piston rod and capable of causing the position sensing end to rotate relative to the piston rod.

[0006] Furthermore, the guiding device includes: a fixing portion, which is used to be fixedly connected to the piston rod; a second slide groove, which is arranged on a side of the fixing portion away from the fixed position of the fixing portion and the piston rod; a second slider, which is located in the second slide groove and can slide along the extension direction of the second slide groove; and the second slider is used to be fixedly connected to the position sensing end.

[0007] Furthermore, a first shrinkage structure is provided at the opening of the second chute, and the first shrinkage structure is used to prevent the second slider from escaping from the second chute.

[0008] Furthermore, the second sliding groove extends along a circular or arc-shaped trajectory, and the center of the circular or arc-shaped trajectory coincides with the central axis of the piston rod.

[0009] Furthermore, the guiding device further includes a connecting block, a first end of the connecting block is connected to the first slider, and a second end of the connecting block is connected to the second slider.

[0010] Furthermore, the first end of the connecting block is connected to a plurality of first sliding blocks.

[0011] Furthermore, the guiding device further includes a sliding plate, which is connected to the first sliding block and the connecting hole.

[0012] Furthermore, the guiding device also includes a protective cover, which is buckled on the second slide groove. The protective cover is provided with an opening, and the connecting block is provided through the opening.

[0013] Furthermore, a second shrinkage structure is provided on a side of the opening away from the second sliding groove, and the second shrinkage structure can prevent the connecting block from falling out.

[0014] According to another aspect of the present invention, an actuating system includes the above-mentioned position measurement system and further includes an actuating cylinder, wherein the actuating cylinder includes a cylinder body and a piston rod sliding in the cylinder body.

[0015] The position measurement system of the present invention is applied. Since the position sensing end can rotate relative to the piston rod, when the piston rod slides and rotates, the guide device can spontaneously correct the sliding trajectory of the position sensing end toward the sliding trajectory of the piston rod while driving the position sensing end to slide, thereby reducing the eccentric sliding of the position sensor and effectively reducing the wear of the position sensor.

[0016] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments with reference to the accompanying drawings, in which:

[0018] Figure 1 is an axonometric diagram of an actuation system according to an embodiment of the present invention;

[0019] Figure 2 A top view of an actuating system according to an embodiment of the present invention;

[0020] Figure 3 yes Figure 2 Cross-sectional view in CC direction;

[0021] Figure 4 is an isometric view of a guide device in an embodiment of the present invention;

[0022] Figure 5 is a bottom view of the guide device in an embodiment of the present invention;

[0023] Figure 6 yes Figure 5 Cross-sectional view in the middle BB direction;

[0024] Figure 7 yes Figure 6 Enlarged view of point A in the middle.

[0025] The above drawings contain the following reference numerals:

[0026] Label name 100 Actuator 110 cylinder block 120 piston rod 200 Position sensing system 210 Position measurement end 220 Position sensing end 230 First slider 240 First chute 250 First connecting rod 260 Second connecting rod 270 Positioning components 300 Guide device 310 Fixed part 320 Second chute 330 Second slider 340 Connection Block 350 protective cover 360 Sliding plate DETAILED DESCRIPTION

[0027] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0028] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. 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. Therefore, they cannot be understood as limitations on the present invention.

[0029] In the description of the present invention, "several" means one or more, "many" means more than two, "greater than," "less than," and "exceed" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. The use of "first" and "second" in the description is solely for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, implicitly specifying the number of the indicated technical features, or implicitly specifying the order of the indicated technical features.

[0030] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0031] Reference Figure 1 This embodiment provides an actuating system, which is composed of an actuating cylinder 100, a position sensing system 200 and a guiding device 300, wherein the position sensing system 200 and the guiding device 300 together constitute a position measurement system.

[0032] The actuator 100 includes a cylinder body 110 and a piston rod 120 sliding in the cylinder body 110 .

[0033] like Figure 1-Figure 3As shown, the position sensing system 200 includes: a first slide groove 240, which is fixedly connected to the cylinder body 110 and extends along the sliding direction of the piston rod 120; a first slider 230, which is partially located in the first slide groove 240 and can slide together with the piston rod 120; a position sensing end 220, which is fixedly connected to the first slider 230; and a position measuring end 210, which is used to be fixedly connected to the cylinder body 110 and is used to detect the position of the movement of the position sensing end 220.

[0034] Among them, a position sensing end can be used as the position sensing end 220, and a magnetostrictive displacement sensor can be used as the position measuring end 210, using magnetostriction to measure the displacement of the piston rod. A photoelectric sensor can also be used as the position measuring end 210.

[0035] Since the position sensing end 220 is fixed on the first slider 230 and slides with the piston rod 120, and the first slider 230 slides under the constraint of the first slide groove 240, it can effectively ensure that the position sensing end 220 slides along the extension direction of the guide rail, that is, the sliding direction of the piston rod 120, thereby reducing the wear caused by the eccentric sliding of the position sensing end 220.

[0036] The first slider 230 can slide with the piston rod 120 in a variety of ways, such as by adsorbing the piston rod 120 and the first slider 230 through a magnet, connecting the first slider 230 and the piston rod 120 through a connecting rod, etc.

[0037] like Figure 1-Figure 2 As shown, the first slider 230 is connected to the piston rod 120 via the second connecting rod 260 , so that the first slider 230 can slide synchronously with the piston rod 120 .

[0038] Furthermore, in order to ensure the stability of the second connecting rod 260 and reduce the deformation of the pressure rod of the second connecting rod 260 during the traction process, a positioning assembly 270 can be fixed on the cylinder body 110. The positioning assembly 270 is located on one side of the extension direction of the second connecting rod 260 and abuts against the second connecting rod 260.

[0039] In order to reduce the deformation of the pressure rod on both sides of the second connecting rod 260 in the sliding direction thereof, positioning assemblies 270 may be provided on both sides of the extending direction of the second connecting rod 260 .

[0040] like Figure 1-Figure 3 As shown, in order to further ensure the overlap between the motion trajectory of the position sensing end 220 and the sliding trajectory of the piston rod 120 and to increase the measurement accuracy of the position sensor, a first connecting rod 250 fixedly connected to the cylinder body 110 can be added to the position sensing system, and the position sensing end 220 is sleeved on the first connecting rod 250 and can slide relative to the first connecting rod 250.

[0041] In order to reduce the eccentric movement of the position sensing end 220 relative to the position sensor and ensure accurate measurement of the position sensor, the axis of the first connecting rod 250 can be set to coincide with the axis of the position sensor.

[0042] like Figure 1 、 Figure 3 As shown, in order to reduce the sliding trajectory deviation of the position sensing end 220 caused by the deformation of the slide rail, and further prevent excessive heat in the actuator 100 from being transferred to the position sensing end 220, causing the position sensing end 220 to demagnetize, the first connecting rod 250 and the cylinder body 110 are located on both sides of the first slide groove 240, and the first slide groove 240 is set close to the cylinder body 110.

[0043] Furthermore, to increase the measuring range of the position sensing system 200 , the position measuring end 210 may be disposed at the end of the first sliding groove 240 away from the piston rod 120 , so that the position sensing end 220 slides along with the first slider 230 over as large a distance as possible.

[0044] like Figure 1-Figure 3 As shown, in order to reduce the influence of the heating of the piston rod 120 on the measurement accuracy and facilitate the removal and replacement of the position sensing system 200 for easy maintenance, the position sensing system 200 can be set outside the cylinder body 110.

[0045] like Figure 1-Figure 7 As shown, the actuation system also includes a position measurement system, which includes a position sensing end 220 connected to the piston rod 120 and capable of moving along the axial direction of the piston rod 120 with the piston rod 120; a position measuring end 210 connected to the cylinder body 110 and used to measure the distance between the position sensing end 220 and the position sensing end 220; and a guide device 300 connected to the position sensing end 220 and the piston rod 120, capable of causing the position sensing end 220 to rotate relative to the piston rod 120.

[0046] When the position measurement system of this embodiment is applied, since the position sensing end 220 can rotate relative to the piston rod 120, when the piston rod 120 slides and rotates, the guiding device 300 can spontaneously correct the sliding trajectory of the position sensing end 220 toward the sliding trajectory of the piston rod 120 while driving the position sensing end 220 to slide, thereby reducing the eccentric sliding of the position sensor 220 and effectively reducing the wear of the position sensing end 220.

[0047] Among them, the guiding device 300 can achieve the goal of driving the position sensing end 220 to slide while spontaneously correcting the sliding trajectory of the position sensing end 220 toward the sliding trajectory of the piston rod 120 in a variety of ways, such as setting a connecting rod, one end of the connecting rod is hinged to the piston rod 120, and the other end is hinged to the position sensing end 220, or adding a rolling bearing, one of the rollers of the bearing is connected to the piston rod 120, and the other roller is connected to the position sensing end 220, etc.

[0048] Among them, the guiding device 300 includes a fixing portion 310, which is used to be fixedly connected to the piston rod 120; a second slide groove 320, which is arranged on a side of the fixing portion 310 away from the fixed position of the fixing portion 310 and the piston rod 120; a second slider 330, which is located in the second slide groove 320 and can slide along the extension direction of the second slide groove 320; the second slider 330 is used to be fixedly connected to the position sensing end 220.

[0049] Since the second slider 330 fixedly connected to the position sensing end 220 can slide in the second slide groove 320, when the fixing part 310 and the piston rod 120 rotate together, the second slider 330 slides in the second slide groove 320, so that the angle between the sliding direction of the position sensing end 220 and the sliding direction of the piston rod 120 is reduced, thereby effectively reducing the eccentric sliding of the position sensing end 220, and reducing the eccentric friction of the position sensing end 220.

[0050] Specifically, the second slider 330 may be connected to the first slider 230 via the second connecting rod 260 .

[0051] like Figure 6 、 Figure 7 As shown, a first shrinkage structure is provided at the opening of the second sliding groove 320 , and the first shrinkage structure is used to prevent the second sliding block 330 from escaping from the second sliding groove 320 .

[0052] like Figure 5 As shown, in order to ensure that the bending moment applied to the second connecting rod 260 is effectively reduced or even eliminated during the rotation of the piston rod 120, the second slide groove 320 can be set to extend along a circular or arc-shaped trajectory, and the center of the circular or arc-shaped trajectory coincides with the central axis of the piston rod 120; when the piston rod 120 rotates, the second slider 330 can slide in the circular or arc-shaped slide rail, so that the bending moment applied to the second connecting rod 260 is greatly reduced or even eliminated.

[0053] In order to better connect the second slider 330 and the second connecting rod 260 , the guiding device 300 further includes a connecting block 340 , a first end of the connecting block 340 is connected to the first slider 230 , and a second end of the connecting block 340 is connected to the second slider 330 .

[0054] In order to prevent a single second slider 330 from being easily deflected and stuck in the second sliding groove 320 , a plurality of second sliders 330 may be fixed to the first end of the connecting block 340 .

[0055] In order to facilitate the replacement of connecting plates of different specifications, the guiding device 300 also includes a sliding plate 360, which connects the first slider 230 to the connecting hole; when the connecting plate needs to be replaced, it is only necessary to disconnect the connection between the connecting plate and the sliding plate 360, without removing multiple second sliders 330 from the connecting plate.

[0056] like Figure 4-Figure 7 As shown, in order to reduce external influences such as dirt and dust on the second slide groove 320, the guiding device 300 further includes a protective cover 350, which is buckled on the second slide groove 320. The protective cover 350 is provided with an opening, and the connecting block 340 is provided through the opening.

[0057] Among them, in order to further prevent the connecting block 340 from falling out after being disconnected from the second slider 330, a second shrinking structure is provided on the side of the opening away from the slide rail to form double protection with the first shrinking structure of the second slide groove 320, and the second shrinking structure can prevent the connecting block 340 from falling out.

[0058] In order to reduce the impact of internal heating of the actuator 100 on the guide system and facilitate the disassembly of the guide system, the guide system can be set outside the piston rod 120 and cooperate with the position sensing system 200 outside the cylinder body 110 to measure the position of the piston rod 120.

[0059] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the scope of knowledge possessed by ordinary technicians in the technical field without departing from the spirit of the present invention.

Claims

1. A position measurement system, characterized in that: include: A position sensing end (220) is connected to the piston rod (120) and is capable of moving along the axial direction of the piston rod (120) along with the piston rod (120); A position measuring end (210) is connected to the cylinder body (110) and is used to measure the distance between the position measuring end (210) and the position sensing end (220); A first sliding groove (240) is fixedly connected to the cylinder body (110) and extends along the sliding direction of the piston rod (120); A first sliding block (230) is partially located in the first sliding groove (240) and is capable of sliding together with the piston rod (120), and the position sensing end (220) is fixedly connected to the first sliding block (230); a guiding device (300) connected to the position sensing end (220) and the piston rod (120), capable of causing the position sensing end (220) to rotate relative to the piston rod (120); The guiding device (300) includes a fixed portion (310), a second slide groove (320), a second slider (330), a connecting block (340) and a second connecting rod (260), wherein the fixed portion (310) is fixedly connected to the piston rod (120), the second slide groove (320) is arranged on a side of the fixed portion (310) away from the fixed position of the fixed portion (310) and the piston rod (120), the second slider (330) is slidably matched with the second slide groove (320), the second slider (330) is used to be fixedly connected to the position sensing end (220), the second slide groove (320) extends along a circular or arc-shaped trajectory, the center of the circular or arc-shaped trajectory coincides with the central axis of the piston rod (120), the first end of the connecting block (340) is connected to the first slider (230) through the second connecting rod (260), and the second end of the connecting block (340) is connected to the second slider (330); The first connecting rod is fixedly connected to the cylinder body (110), and the position sensing end (220) is sleeved on the first connecting rod (250) and can slide relative to the first connecting rod (250).

2. The position measurement system according to claim 1, wherein: A first shrinkage structure is provided at the opening of the second sliding groove (320), and the first shrinkage structure is used to prevent the second sliding block (330) from escaping from the second sliding groove (320).

3. The position measurement system according to claim 1, wherein: A plurality of the first sliding blocks (230) are provided.

4. The position measurement system according to claim 1, wherein: The guiding device (300) further comprises a sliding plate (360), wherein the sliding plate (360) is connected to the second sliding block (330).

5. The position measurement system according to claim 4, characterized in that: The guiding device (300) further includes a protective cover (350), wherein the protective cover (350) is buckled onto the second slide groove (320), and an opening is provided on the protective cover (350), and the connecting block (340) is provided through the opening.

6. The position measurement system according to claim 5, characterized in that: A second constriction structure is provided on a side of the opening away from the second sliding groove (320), and the second constriction structure can prevent the connecting block (340) from falling out.

7. An actuation system, characterized in that: The position measurement system according to claim 1 further comprises an actuator (100), wherein the actuator (100) comprises a cylinder (110) and a piston rod (120) sliding in the cylinder (110).

Images