Electric push rod stroke detection device

Abstract

The utility model relates to the technical field of electric push rod detection, and particularly discloses an electric push rod stroke detection device, which comprises a bottom plate, non-contact measurement structures are symmetrically arranged at the upper end part of the bottom plate, each non-contact measurement structure comprises two fixed plates, a laser sensor is arranged between the two fixed plates, and a chute is formed in the bottom plate. A sliding groove is formed in the bottom plate, a piston is arranged in the sliding groove, a gas spring is fixedly installed in the bottom plate in an embedded mode, the piston can stretch into the sliding groove through the gas spring, a sliding plate is slidably installed in the sliding groove, and a piston rod of the gas spring is fixedly installed on the sliding plate. After the electric push rod body is in place and stops, the laser sensor detects the distance of the top cover through the rectangular groove, a worker checks whether the extension distance of the electric push rod body is consistent with the detection distance of the laser sensor, non-contact detection is completed, and friction errors caused by traditional mechanical contact type detection are avoided.

Description

Technical Field

[0001] This utility model relates to the field of electric linear actuator testing technology, and in particular to an electric linear actuator stroke testing device. Background Technology

[0002] An electric linear actuator is an electrically driven device that converts the rotary motion of an electric motor into the linear reciprocating motion of a linear actuator.

[0003] A search of Chinese patent publication number "CN220153536U" reveals "an electric linear actuator stroke detection fixture". This fixture uses two limiting plates located at the minimum and maximum stroke positions of the electric linear actuator body to detect whether the stroke of the electric linear actuator body meets the standard. It is not only easy to operate, but also has high detection efficiency and accuracy. Moreover, the position of the limiting plates can be freely adjusted, so it can be adapted to electric linear actuator bodies of different specifications, making it more versatile.

[0004] Based on the above search and existing technology, it was found that the above patent has certain defects. When the device is in use, it uses threaded transmission, sliding and other motion forms to detect the stroke of the electric push rod in a contact manner. However, due to the wear between the mechanical parts, detection errors are prone to occur after long-term use, resulting in insufficient practicality and needing improvement. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] To address the shortcomings of existing technologies, this utility model provides an electric push rod stroke detection device, which solves the technical problem of insufficient practicality of existing devices.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, this utility model provides the following technical solution:

[0009] An electric linear actuator stroke detection device includes a base plate;

[0010] The upper end of the base plate is symmetrically provided with non-contact measurement structures;

[0011] The non-contact measurement structure includes a fixed plate, a laser sensor between two fixed plates, a sliding groove inside the base plate, a gas spring embedded and fixed inside the base plate, the gas spring can extend a piston into the sliding groove, and a sliding plate is slidably installed inside the sliding groove.

[0012] Preferably, the piston rod of the gas spring is fixedly installed with the sliding plate, the sliding plate has a rectangular groove running through it, and rectangular frames are symmetrically fixedly installed on the upper end of the base plate. Both rectangular frames have through grooves running through them, and both rectangular frames are located on both sides of the fixed plate.

[0013] Preferably, a cylindrical spring is fixedly installed inside each of the two through slots, a cleaning wipe is slidably installed between the two through slots, the cleaning wipe is fixedly installed with the cylindrical spring, the cleaning wipe is in contact with the surface of the laser sensor, and wedge blocks are symmetrically fixedly installed on the side wall of the sliding plate, both of the wedge blocks are located inside the through slots and are slidably installed.

[0014] Preferably, the upper end of the base plate is provided with a mold, the mold has a mold groove inside, the mold groove is provided with an electric push rod body, the output shaft of the electric push rod body is provided with a top cover, the size of the top cover is larger than the size of the rectangular groove, and the top cover is in contact with the probe of the laser sensor.

[0015] (III) Beneficial Effects

[0016] Firstly, by setting up a non-contact measurement structure, the staff sets the extension stroke of the electric push rod body and opens it. Its output shaft drives the top cover to extend, pushing the rectangular groove so that the sliding plate slides along the groove. After the electric push rod body stops in place, the laser sensor detects the distance to the top cover through the rectangular groove. The staff checks whether the extension distance of the electric push rod body is consistent with the detection distance of the laser sensor, thus completing the non-contact detection and avoiding the friction error of traditional mechanical contact detection.

[0017] Secondly, when the sliding plate slides along the groove, the gas spring piston rod is stretched, and the sliding plate drives the wedge block to move towards the fixed plate side, so that the wedge block slides in the through groove. The lower surface of the wedge block presses down on the cleaning wipe, compresses the cylindrical spring, and the cleaning wipe cleans the surface of the laser sensor. This can prevent dust from falling on the probe of the laser sensor and causing instability in the detection. Furthermore, the self-cleaning is completed while the electric push rod body pushes out the power, which can greatly improve the convenience of the device. Attached Figure Description

[0018] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings.

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0020] Figure 2 This is a three-dimensional exploded view of the structure of this utility model.

[0021] Figure 3 This is a cross-sectional view of the groove of this utility model;

[0022] Figure 4 This is a cross-sectional view of the rectangular frame of this utility model.

[0023] Legend: 11. Base plate; 12. Fixing plate; 13. Laser sensor; 14. Slide groove; 15. Gas spring; 16. Sliding plate; 17. Rectangular groove; 18. Rectangular frame; 19. Through groove; 21. Cylindrical spring; 22. Cleaning wipe; 23. Wedge block; 24. Mold; 25. Mold groove; 26. Electric push rod body; 27. Top cover. Detailed Implementation

[0024] This application provides an electric push rod stroke detection device, which effectively solves the technical problem of insufficient practicality of existing devices. By setting a non-contact measurement structure, the operator sets the extension stroke of the electric push rod body and opens it. Its output shaft drives the top cover to extend, pushing the rectangular groove so that the sliding plate slides along the groove. After the electric push rod body stops in place, the laser sensor detects the distance to the top cover through the rectangular groove. The operator checks whether the extension distance of the electric push rod body is consistent with the detection distance of the laser sensor, thus completing the non-contact detection and avoiding the friction error of traditional mechanical contact detection. When the sliding plate slides along the groove, the gas spring piston rod is stretched, and the sliding plate drives the wedge block to move towards the fixed plate side, so that the wedge block slides in the through groove. The lower surface of the wedge block presses down on the cleaning wipe, compressing the cylindrical spring. The cleaning wipe cleans the surface of the laser sensor, thereby avoiding dust falling on the laser sensor probe and causing instability in the detection. Furthermore, the self-cleaning is completed while the electric push rod body is pushing out, which greatly improves the convenience of the device.

[0025] Example

[0026] like Figure 1 - Figure 4 As shown, the technical solution in this application embodiment effectively solves the technical problem of insufficient practicality of existing devices. The overall idea is as follows:

[0027] To address the problems existing in the prior art, this utility model provides an electric push rod stroke detection device, including a base plate 11;

[0028] The upper end of the base plate 11 is symmetrically provided with non-contact measurement structures;

[0029] The non-contact measurement structure includes a fixed plate 12, a laser sensor 13 between the two fixed plates 12, a sliding groove 14 inside the base plate 11, a gas spring 15 embedded and fixedly installed inside the base plate 11, the gas spring 15 can extend the piston into the sliding groove 14, and a sliding plate 16 is slidably installed inside the sliding groove 14.

[0030] By setting up a non-contact measurement structure, the operator sets the extension stroke of the electric push rod body 26 and opens it. Its output shaft drives the top cover 27 to extend, pushing the rectangular groove 17 to make the sliding plate 16 slide along the groove 14. After the electric push rod body 26 stops in place, the laser sensor 13 detects the distance of the top cover 27 through the rectangular groove 17. The operator checks whether the extension distance of the electric push rod body 26 is consistent with the detection distance of the laser sensor 13, thus completing the non-contact detection and avoiding the friction error of traditional mechanical contact detection.

[0031] The piston rod of the gas spring 15 is fixedly installed with the sliding plate 16. A rectangular groove 17 is opened through the interior of the sliding plate 16. Rectangular frames 18 are symmetrically fixedly installed on the upper end of the base plate 11. Both rectangular frames 18 have through grooves 19. Both rectangular frames 18 are located on both sides of the fixed plate 12. A cylindrical spring 21 is fixedly installed inside both through grooves 19. A cleaning wipe 22 is slidably installed between the two through grooves 19. The cleaning wipe 22 is fixedly installed with the cylindrical spring 21. The cleaning wipe 22 is in contact with the surface of the laser sensor 13. Wedge blocks 23 are symmetrically fixedly installed on the side wall of the sliding plate 16. Both wedge blocks 23 are made of black matte aluminum. Both wedge blocks 23 are located inside the through grooves 19 and are slidably installed.

[0032] By setting the wedge block 23 to a black matte aluminum material, it can absorb stray light between the electric actuator body 26 and the laser sensor 13, which further facilitates the detection of the laser sensor 13;

[0033] When the sliding plate 16 slides along the groove 14, the piston rod of the gas spring 15 is stretched, and the sliding plate 16 drives the wedge block 23 to move towards the fixed plate 12, so that the wedge block 23 slides in the through groove 19. The lower surface of the wedge block 23 presses down on the cleaning wipe 22, compressing the cylindrical spring 21. The cleaning wipe 22 cleans the surface of the laser sensor 13, thereby avoiding dust falling on the probe of the laser sensor 13 and causing instability in the detection. Furthermore, the self-cleaning is completed while the electric push rod body 26 pushes out the power, which greatly improves the convenience of the device (when the sliding plate 16 slides more than half the distance of the groove 14, the cleaning wipe 22 will be located below the probe point and will not interfere with the probe measurement).

[0034] The upper end of the base plate 11 is provided with a mold 24, the mold 24 has a mold groove 25 inside, the mold groove 25 is provided with an electric push rod body 26, the output shaft of the electric push rod body 26 is provided with a top cover 27, the size of the top cover 27 is larger than the size of the rectangular groove 17, and the top cover 27 is in contact with the probe of the laser sensor 13.

[0035] Currently, the top cover 27 at the end of the output shaft of the existing electric actuator body 26 is usually made of stainless steel. Since stainless steel has a high refractive index, it is also very beneficial for the detection of the laser sensor 13.

[0036] Working principle:

[0037] In the first step, during use, the operator can first fix the electric push rod body 26 to be tested inside the mold groove 25 and power on the electric push rod body 26. Then, the operator can set the extension stroke of the electric push rod body 26 and turn on the electric push rod body 26, so that the output shaft of the electric push rod body 26 drives the top cover 27 to extend. The top cover 27 pushes the rectangular groove 17 to drive the sliding plate 16 to slide along the inside of the sliding groove 14. After the electric push rod body 26 extends to the end, it will stop. At the same time, the laser emitted by the laser sensor 13 will pass through the rectangular groove 17 to detect the distance of the top cover 27. Then, the operator can check whether the extension distance of the electric push rod body 26 and the detection distance of the laser sensor 13 are consistent, and thus complete the test.

[0038] In the second step, when the sliding plate 16 slides along the groove 14, the piston rod of the gas spring 15 will be stretched. At the same time, the movement of the sliding plate 16 will drive the wedge block 23 to move towards the fixed plate 12, so that the wedge block 23 slides inside the through groove 19. Meanwhile, the lower surface of the wedge block 23 will press down on the cleaning wipe 22, causing the cylindrical spring 21 to be compressed. The cleaning wipe 22 cleans the surface of the laser sensor 13. At the same time, when the electric push rod body 26 retracts, the piston rod of the gas spring 15 and the cylindrical spring 21 will automatically reset.

[0039] Finally, it should be noted that the above embodiments are merely examples for clearly illustrating the present invention and are not intended to limit the implementation. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. An electric trolley stroke detection device comprising a base plate (11), Characterized in that; The upper end of the bottom plate (11) is symmetrically provided with a non-contact measurement structure; The non-contact measurement structure comprises a fixed plate (12), two fixed plates (12) are provided with a laser sensor (13) therebetween, a sliding groove (14) is formed in the inside of the bottom plate (11), an air spring (15) is fixedly installed in the inside of the bottom plate (11) in a embedded manner, the air spring (15) can extend the piston into the inside of the sliding groove (14), and a sliding plate (16) is slidingly installed in the inside of the sliding groove (14). The piston rod of the air spring (15) is fixedly installed with the sliding plate (16), and a rectangular groove (17) is formed in the inside of the sliding plate (16).

2. An electric push rod stroke detection device according to claim 1, wherein The upper end of the bottom plate (11) is symmetrically fixedly installed with a rectangular frame (18); The inside of each of the two rectangular frames (18) is penetratedly formed with a through groove (19), and the two rectangular frames (18) are located on the two sides of the fixed plate (12).

3. An electric push rod stroke detection device according to claim 2, wherein The inside of each of the two through grooves (19) is fixedly installed with a cylindrical spring (21), a cleaning wiper (22) is slidingly installed between the two through grooves (19), the cleaning wiper (22) is fixedly installed with the cylindrical spring (21), and the cleaning wiper (22) is attached to the surface of the laser sensor (13). The side wall of the sliding plate (16) is symmetrically fixedly installed with a wedge-shaped block (23), and the two wedge-shaped blocks (23) are slidingly installed in the inside of the through groove (19).

4. An electric push rod stroke detection device as set forth in claim 1, wherein The upper end of the bottom plate (11) is provided with a mold (24); The inside of the mold (24) is formed with a mold groove (25).

5. An electric push rod stroke detection device as claimed in claim 4, characterized in that The inside of the mold groove (25) is provided with an electric push rod body (26); The output shaft of the electric push rod body (26) is provided with a top cover (27).

6. An electric trolley stroke sensing device as claimed in claim 5, wherein, The size of the top cover (27) is greater than that of the rectangular groove (17). The top cover (27) is attached to the probe of the laser sensor (13).

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