Electric cylinder device with displacement sensor

Abstract

The utility model relates to the technical field of electric cylinder devices, in particular to an electric cylinder device with a displacement sensor. Comprising an electric cylinder which comprises a cylinder body and a first telescopic rod; and the displacement sensor is located on the outer side of the electric cylinder and comprises a sensor body and a second telescopic rod, the sensor body is connected with the cylinder body, the first telescopic rod is parallel to the second telescopic rod, and a connecting piece is connected between the first telescopic rod and the second telescopic rod. According to the electric cylinder device with the displacement sensor, parameters such as displacement and speed of telescopic movement of the electric cylinder can be measured more accurately through the displacement sensor, and the parameters serve as feedback parameters to guide or adjust movement of the electric cylinder, so that the defect that use requirements of precise occasions cannot be met due to insufficient displacement feedback precision of the electric cylinder is overcome.

Description

Technical Field

[0001] The utility model relates to the technical field of electric cylinder devices, in particular to an electric cylinder device with a displacement sensor. Background Art

[0002] The electric cylinder is a modular product that integrates a servo motor and a lead screw. It converts the servo motor's rotational motion into linear motion. At the same time, it converts the servo motor's best advantages - precise speed control, precise rotational speed control, and precise torque control - into precise speed control, precise position control, and precise thrust control.

[0003] Currently, in some precision occasions, the displacement feedback accuracy of existing electric cylinders is not sufficient, or after being used for a period of time, the displacement feedback accuracy of the electric cylinders deteriorates, making them unusable in the above-mentioned precision occasions. Utility Model Content

[0004] The purpose of the utility model is to overcome the shortcomings of the background technology that the electric cylinder displacement feedback accuracy is not enough to meet the needs of use in precision occasions, and to provide an electric cylinder device with a displacement sensor.

[0005] The utility model provides an electric cylinder device with a displacement sensor, comprising:

[0006] The electric cylinder comprises a cylinder body and a first telescopic rod;

[0007] A displacement sensor is located outside the electric cylinder. The displacement sensor includes a sensor body and a second telescopic rod. The sensor body is connected to the cylinder body. The first telescopic rod is parallel to the second telescopic rod. A connecting piece is connected between the first telescopic rod and the second telescopic rod.

[0008] The utility model provides an electric cylinder device with a displacement sensor, in which the displacement sensor is externally connected to the outside of the electric cylinder, and the sensor body of the displacement sensor is fixedly connected to the cylinder body of the electric cylinder, the second telescopic rod is fixedly connected to the first telescopic rod by a connecting piece, the first telescopic rod and the second telescopic rod are arranged in parallel, and when the first telescopic rod of the electric cylinder is extended or retracted relative to the cylinder body, the second telescopic rod of the displacement sensor can be driven to synchronously extend or retract relative to the sensor body, so that the displacement, speed and other parameters of the telescopic movement of the electric cylinder can be more accurately measured by the displacement sensor, which can be used as feedback parameters to guide or adjust the movement of the electric cylinder, so as to make up for the deficiency that the electric cylinder displacement feedback accuracy is insufficient and cannot meet the needs of use in precision occasions.

[0009] Preferably, a placement seat is provided on the first telescopic rod, and the placement seat includes a first seat body and a second seat body connected to each other, the second seat body is located on the side of the first seat body away from the cylinder body, and the side of the first seat body away from the cylinder body has a placement plane, and the placement plane is perpendicular to the movement direction of the first telescopic rod.

[0010] The placement plane can be used to support the connecting piece. The placement plane is a plane and parallel to the movement direction of the first telescopic rod. It can adjust the posture of the connecting piece and eliminate the measurement error caused by the deflection of the connecting piece as much as possible.

[0011] Preferably, the connecting member is provided with a first hole which can be sleeved and matched with the second seat body, the axis of the first hole is parallel to the movement direction of the first telescopic rod, and the bottom surface of the connecting member can fit the placement plane; the size of the first seat body is larger than the inner diameter of the first hole.

[0012] The connecting piece can be sleeved on the second base through the first hole, and the posture of the connecting piece can be fixed and adjusted by the fit between the bottom surface of the connecting piece and the placement plane.

[0013] Preferably, it further includes a first locking nut, the outer circumferential surface of the first telescopic rod is provided with a thread, the first locking nut is matched with the thread of the first telescopic rod, and the first seat body and the first locking nut clamp the connecting piece from both sides respectively.

[0014] The connecting piece is clamped by the first locking nut, which has the characteristics of easy installation and disassembly and high connection tightness.

[0015] Preferably, the connecting member is further provided with a second hole parallel to and side by side with the first hole, and the second hole has a mounting notch on a side away from the first hole, and the mounting notch is used for the second telescopic rod to be laterally installed in the second hole.

[0016] The second hole can be used to be sleeved with the second telescopic rod. The axis of the second hole is parallel to the axis of the first hole, so that the second telescopic rod is limited to be parallel to the first telescopic rod after being in place, thereby more accurately measuring the telescopic parameters of the electric cylinder.

[0017] An installation notch is provided on the side of the second hole, so that the second telescopic rod can be moved laterally from the side into the second hole, which helps to simplify the installation operation of the displacement sensor.

[0018] Preferably, at least two second locking nuts are further included, the outer circumferential surface of the second telescopic rod is provided with threads, the second locking nuts are matched with the threads of the second telescopic rod, and the at least two second locking nuts clamp the connecting piece from both sides respectively.

[0019] Preferably, the connecting member is a plate of equal thickness, and the connecting member includes a large head and a small head. The first hole is provided on the large head, and the second hole is provided on the small head.

[0020] The connecting piece is a plate of equal thickness, which facilitates the tightening of the locking nut, or the locking nut and the mounting seat clamp the connecting piece from both sides, and the second telescopic rod is installed as parallel to the first telescopic rod as possible;

[0021] During the research and development process, the applicant discovered that when the first telescopic rod pushes the connecting member to move, due to factors such as the acceleration of the connecting member in the direction of the force applied, the stress of the connecting member near the first telescopic rod will be greater than the stress near the second telescopic rod. Therefore, the present application provides a large head and a small head on the connecting member. The structural strength and rigidity of the large head are greater than those of the small head. The large head is used to connect the first telescopic rod, and the small head is used to connect the second telescopic rod. This can improve structural safety and reduce deformation while saving materials.

[0022] Preferably, at least two connecting seats are spaced apart on the sensor body, and the side surfaces of the connecting seats are connected to the cylinder body.

[0023] Preferably, a through hole is provided in the middle of the connecting seat, the sensor body is passed through the through hole, and a first connecting plane is provided on the side of the connecting seat, and the first connecting plane can fit the outer wall of the cylinder body.

[0024] The sensor body is passed through the through hole, and the annular wall of the through hole can form an annular support for the sensor body, thereby improving the connection effect between the sensor body and the connecting seat and reducing the probability of loosening and shaking.

[0025] Preferably, the cylinder body includes at least two end covers arranged at intervals, the end covers have side planes, and the first connecting plane is in contact with the side planes.

[0026] The side plane is a plane, and the connection tightness between the connecting seat and the sensor body can be improved by fitting the side plane with the first connecting plane;

[0027] Preferably, the outer wall of the cylinder body is provided with a step portion, and at least one of the connecting seats is cooperatively connected to two side walls of the step portion.

[0028] The step portion includes two contact surfaces at an angle. The connecting seat and the two contact surfaces of the step portion abut against each other at the same time, which can improve the connection strength between the connecting seat and the cylinder body from at least two directions, thereby improving the connection effect between the electric cylinder and the displacement sensor.

[0029] Preferably, the connecting seat can move relative to the cylinder body along the movement direction of the first telescopic rod.

[0030] Preferably, the displacement sensor is an LVDT displacement sensor.

[0031] The LVDT displacement sensor has high rated sensing accuracy and can help improve the displacement accuracy of the electric cylinder when the displacement feedback accuracy of the electric cylinder is insufficient or deteriorates after a period of use.

[0032] Preferably, the electric cylinder is connected to the displacement sensor signal.

[0033] Compared with the prior art, the present invention has the following beneficial effects:

[0034] The utility model provides an electric cylinder device with a displacement sensor, in which the displacement sensor is externally connected to the outside of the electric cylinder, and the sensor body of the displacement sensor is fixedly connected to the cylinder body of the electric cylinder, the second telescopic rod is fixedly connected to the first telescopic rod by a connecting piece, the first telescopic rod and the second telescopic rod are arranged in parallel, and when the first telescopic rod of the electric cylinder is extended or retracted relative to the cylinder body, the second telescopic rod of the displacement sensor can be driven to synchronously extend or retract relative to the sensor body, so that the displacement, speed and other parameters of the telescopic movement of the electric cylinder can be more accurately measured by the displacement sensor, which can be used as feedback parameters to guide or adjust the movement of the electric cylinder, so as to make up for the deficiency that the electric cylinder displacement feedback accuracy is insufficient and cannot meet the needs of use in precision occasions. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 This is a schematic structural diagram of the electric cylinder device with a displacement sensor according to the present invention;

[0036] Figure 2 for Figure 1 Enlarged view of part A in the middle;

[0037] Figure 3 This is a front view of the electric cylinder device with a displacement sensor according to the present utility model;

[0038] Figure 4 This is a top view of the electric cylinder device with a displacement sensor according to the present invention;

[0039] Figure 5 This is a structural diagram of the electric cylinder device with a displacement sensor according to the present invention (the displacement sensor is omitted);

[0040] Figure 6 This is a schematic structural diagram of the electric cylinder device with a displacement sensor according to the present invention (the electric cylinder is omitted);

[0041] Figure 7 This is a schematic diagram of the placement seat of the utility model (connecting parts are hidden).

[0042] Markings in the figure:

[0043] 1- Electric cylinder;

[0044] 11-cylinder body; 12-first telescopic rod; 13-mounting seat; 14-first seat body; 15-second seat body; 16-mounting plane;

[0045] 2-displacement sensor;

[0046] 21-sensor body; 22-second telescopic rod;

[0047] 3-Connecting parts;

[0048] 31-first hole;

[0049] 311-first locking nut;

[0050] 32-second hole;

[0051] 321-Installation gap;

[0052] 322-second locking nut;

[0053] 33-large head;

[0054] 34-small head;

[0055] 4-Connection seat;

[0056] 41 - perforation; 42 - end cap; 43 - first connection plane; 44 - second connection plane; 45 - side plane; 46 - step portion. DETAILED DESCRIPTION

[0057] The present invention will be further described in detail below with reference to specific embodiments. However, this should not be construed as limiting the scope of the present invention to the following embodiments. All technologies implemented based on the present invention fall within the scope of the present invention.

[0058] Unless otherwise specified, in the description of the specific embodiments of the present invention, the terms indicating orientation or positional relationships such as "upper," "lower," "left," "right," "center," "inside," and "outside" are based on the orientation or positional relationships shown in the accompanying drawings, or are the orientation or positional relationships in which the product / device / apparatus of the present invention is placed when it is conventionally used. These terms of orientation or positional relationships are merely for the purpose of facilitating the description of the present invention or simplifying the description of the specific embodiments to facilitate a quick understanding of the solutions by technicians, and do not indicate or imply that a particular device / component / element must have a specific orientation or be constructed and operated in a specific positional relationship. Therefore, they should not be understood as limitations on the present invention.

[0059] In addition, if the terms "horizontal", "vertical", "overhanging", "parallel" and the like appear, it does not mean that the corresponding devices / components / elements are required to be absolutely horizontal or vertical or overhanging or parallel, but may be slightly tilted or have deviations. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but may be slightly tilted. Alternatively, it can be simply understood that the corresponding devices / components / elements are set in directions such as "horizontal", "vertical", "overhanging", and "parallel", and can have an error / deviation of ±10% relative to the corresponding direction setting, more preferably an error / deviation within ±8%, more preferably an error / deviation within ±6%, more preferably an error / deviation within ±5%, and more preferably an error / deviation within ±4%. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its role in the solution of the present utility model.

[0060] In addition, the expressions “first”, “second”, “third”, etc. in the terms are merely used to distinguish the description of the same or similar components, and should not be understood as emphasizing or implying the relative importance of specific components.

[0061] In addition, in the description of the embodiments of the present invention, "several", "a plurality", and "a number" represent at least 2. It can be any number such as 2, 3, 4, 5, 6, 7, 8, 9, and even more than 9.

[0062] Furthermore, in the description of the technical solutions of this utility model, unless otherwise expressly specified / defined / restricted, the terms "disposed," "installed," "connected," "connected," "provided with," "laid," and "arranged" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections. They may be welding, riveting, bolting, threading, or other commonly used connection methods in the art. Such connections may be mechanical, electrical, or communication connections; they may be direct connections, indirect connections through an intermediate medium, or internal connections between two components.

[0063] Example 1

[0064] like Figure 1-7 As shown, this embodiment provides an electric cylinder 1 device with a displacement sensor 2, including an electric cylinder 1 and a displacement sensor 2. The electric cylinder 1 has a cylinder body 11 and a first telescopic rod 12; the displacement sensor 2 is located on the outside of the electric cylinder 1, and the displacement sensor 2 includes a sensor body 21 and a second telescopic rod 22. The sensor body 21 is connected to the cylinder body 11, the first telescopic rod 12 is parallel to the second telescopic rod 22, and a connecting member 3 is connected between the first telescopic rod 12 and the second telescopic rod 22.

[0065] The electric cylinder 1 is a telescopic cylinder structure driven by a stepper motor or servo motor. In this embodiment, a servo motor is preferred to improve stroke accuracy and meet the needs of precision operation. The electric cylinder 1 has a first telescopic rod 12 that can be extended or retracted relative to the cylinder body 11. In some embodiments, the first telescopic rod 12 is also called the piston rod. By extending and retracting the first telescopic rod 12 relative to the cylinder body 11, the electric cylinder 1 can achieve functions such as propulsion and retraction.

[0066] The displacement sensor 2 is a linear displacement sensor capable of measuring travel data, which may include displacement, velocity, acceleration, etc. The displacement sensor 2 includes a sensor body 21 equipped with various components, and a second telescopic rod 22 that can be extended or retracted relative to the sensor body 21. Data measurement is achieved by extending or retracting the second telescopic rod 22 relative to the sensor body 21. The displacement sensor 2 can transmit the measured data in the form of a signal to help improve the accuracy of the electric cylinder 1.

[0067] This embodiment provides an electric cylinder 1 device with a displacement sensor 2. The displacement sensor 2 is externally connected to the outside of the electric cylinder 1, and the sensor body 21 of the displacement sensor 2 is fixedly connected to the cylinder body 11 of the electric cylinder 1. The second telescopic rod 22 is fixedly connected to the first telescopic rod 12 via a connector 3. The first telescopic rod 12 and the second telescopic rod 22 are arranged in parallel. When the first telescopic rod 12 of the electric cylinder 1 extends or retracts relative to the cylinder body 11, it can drive the second telescopic rod 22 of the displacement sensor 2 to synchronously extend or retract relative to the sensor body 21. Therefore, the displacement sensor 2 can more accurately measure parameters such as the displacement and speed of the telescopic motion of the electric cylinder 1. These parameters can be used as feedback parameters to guide or adjust the motion of the electric cylinder 1, thereby compensating for the insufficient displacement feedback accuracy of the electric cylinder 1, which cannot meet the needs of use in precision applications.

[0068] In this embodiment, the displacement sensor 2 is preferably an LVDT displacement sensor. The LVDT displacement sensor has high precision, stable performance, and multiple transmission signals.

[0069] The electric cylinder 1 is connected to the displacement sensor 2 by signals, such as electrical connection, and data can be assisted by a computer for processing.

[0070] In one or several preferred embodiments, a placement seat 13 is provided on the first telescopic rod 12, and the placement seat 13 includes a first seat body 14 and a second seat body 15 connected to each other. The second seat body 15 is located on the side of the first seat body 14 away from the cylinder body 11. The side of the first seat body 14 away from the cylinder body 11 has a placement plane 16, and the placement plane 16 is perpendicular to the movement direction of the first telescopic rod 12.

[0071] like Figure 7As shown, in this embodiment, the placement seat 13 is a boss structure, including a first seat body 14 close to the cylinder body 11 and a second seat body 15 connected to the first seat body 14, the size of the second seat body 15 is smaller than the first seat body 14, so that a circumferential placement plane 16 is formed on the side of the first seat body 14 close to the second seat body 15; the placement plane 16 can be used to abut and support the connecting member 3. The placement plane 16 is a plane and perpendicular to the movement direction of the first telescopic rod 12, and can be used to adjust the posture of the connecting member 3 to eliminate the measurement error caused by the deflection of the connecting member 3 as much as possible.

[0072] In this embodiment, the movement direction of the first telescopic rod 12 relative to the cylinder body 11 can be defined as the longitudinal direction, and a direction perpendicular to the longitudinal direction can be defined as the transverse direction.

[0073] Preferably, the connecting member 3 is provided with a first hole 31 that can be sleeved and matched with the second base body 15, the axis of the first hole 31 is parallel to the movement direction of the first telescopic rod 12, and the bottom surface of the connecting member 3 can fit the placement plane 16; the size of the first base body 14 is larger than the inner diameter of the first hole 31.

[0074] This snug fit improves the connection between the connector 3 and the mounting base 13, reducing installation errors such as wobble and tilt, and facilitating improved measurement accuracy of the displacement sensor 2 on the extension and contraction of the electric cylinder 1. The connector 3 is mounted on the second base 15 of the mounting base 13 through the first hole 31. The bottom surface of the connector 3 snugly fits against the mounting surface 16, securing and adjusting the connector 3's posture.

[0075] Preferably, the outer diameter of the second base body 15 is equal to or slightly smaller than the inner diameter of the first hole 31, so that the first hole 31 can be installed in the second base body 15 without relative lateral displacement between the two, so as to improve the measurement accuracy during use and avoid velocity or acceleration measurement errors caused by lateral relative displacement.

[0076] Preferably, it further includes a first locking nut 311. The outer peripheral surface of the first telescopic rod 12 is provided with a thread. The first locking nut 311 is threadedly matched with the first telescopic rod 12. The first base 14 and the first locking nut 311 clamp the connector 3 from both sides respectively.

[0077] The outer diameter of the first locking nut 311 is larger than the inner diameter of the first hole 31. After the connector 3 is sleeved on the first telescopic rod 12, the first locking nut 311 can be screwed and installed on the side of the connector 3 away from the first base body 14, and the first locking nut 311 is tightened until it abuts the connector 3 to clamp the connector 3. This fastening method has the characteristics of easy installation and disassembly and high connection tightness.

[0078] In this embodiment, a screw rod is connected to a side of the second base body 15 away from the first base body 14 , and a thread is provided on the screw rod for threadably engaging with the first locking nut 311 .

[0079] In one or several preferred embodiments, the connecting member 3 is further provided with a second hole 32 parallel to and side by side with the first hole 31 , and the second hole 32 has a mounting notch 321 on a side away from the first hole 31 , and the mounting notch 321 is used for allowing the second telescopic rod 22 to be horizontally installed in the second hole 32 .

[0080] like Figure 1 As shown, the second hole 32 and the first hole 31 are arranged parallel and side by side. The second hole 32 can be used to be mounted on the second telescopic rod 22 to limit the second telescopic rod 22 to be parallel to the first telescopic rod 12 after being in place, thereby more accurately measuring the telescopic parameters of the electric cylinder 1.

[0081] like Figure 4-5 As shown, the mounting notch 321 is a partition structure opened on the side wall of the second hole 32. The second hole 32 can be connected to the outside of the hole in the horizontal direction through the mounting notch 321, so that the second telescopic rod 22 can move laterally from the side into the second hole, which is conducive to simplifying the installation operation of the displacement sensor 2.

[0082] In this embodiment, the second hole 32 is a circular hole, and the width of the installation notch 321 is equal to the diameter of the second hole 32 .

[0083] Preferably, at least two second locking nuts 322 are further included. The outer peripheral surface of the second telescopic rod 22 is provided with threads. The second locking nuts 322 are threadedly matched with the second telescopic rod 22. The at least two second locking nuts 322 clamp the connector 3 from both sides respectively.

[0084] The outer diameter of the second locking nut 322 is larger than the inner diameter of the second hole 32; the second locking nut 322 is screwed from both sides close to the connecting member 3, which can clamp the connecting member 3, thereby fixing the connecting member 3 and the second telescopic rod 22 in both the longitudinal and transverse directions. This method has high fixing strength and is easy to install and disassemble.

[0085] Preferably, the connecting member 3 is a plate of uniform thickness, and includes a large head 33 and a small head 34 . The first hole 31 is located in the large head 33 , and the second hole 32 is located in the small head 34 .

[0086] The connecting member 3 is a plate of uniform thickness, which is convenient for two locking nuts, or the locking nuts and the mounting seat 13 to clamp the connecting member 3 from both sides, and to make the second telescopic rod 22 installed in place as parallel as possible to the first telescopic rod 12;

[0087] During the research and development process, the applicant discovered that when the first telescopic rod 12 pushes the connecting member 3 to move, due to factors such as the acceleration of the connecting member 3 in the direction of the force applied, the stress of the connecting member 3 near the first telescopic rod 12 will be greater than the stress near the second telescopic rod 22. Therefore, the present application provides a large head 33 and a small head 34 on the connecting member 3. The strength and rigidity of the large head 33 are greater than those of the small head 34. The large head 33 is used to connect to the first telescopic rod 12, and the small head 34 is used to connect to the second telescopic rod 22. This can improve structural safety and reduce deformation while saving materials.

[0088] In one or more preferred embodiments, at least two connecting seats 4 are spaced apart on the sensor body 21 , and the side surfaces of the connecting seats 4 are connected to the cylinder body 11 .

[0089] At least two spaced-apart connecting seats 4 can realize fixed connection between the sensor body 21 and the cylinder body 11 ; multiple spaced-apart connecting seats 4 provide multiple support points, which can reduce the probability of deflection and dislocation between the sensor body 21 and the cylinder body 11 .

[0090] Preferably, a through hole 41 is provided in the middle of the connecting seat 4 , and the sensor body 21 is passed through the through hole 41 . A first connecting plane 43 is provided on the side of the connecting seat 4 , and the first connecting plane 43 can fit the outer wall of the cylinder body 11 .

[0091] The sensor body 21 is passed through the through hole 41 , and the annular wall of the through hole 41 can form an annular support for the sensor body 21 , thereby improving the connection effect between the sensor body 21 and the connecting seat 4 and reducing the probability of loosening and shaking.

[0092] In this embodiment, the surface of the connecting base 4 having the through hole 41 is defined as the front surface, and the surface connected to the front surface is defined as the side surface. The first connecting plane 43 can be provided on the side of the connecting base 4 close to the cylinder body 11.

[0093] Preferably, the cylinder body 11 includes at least two end covers 42 spaced apart from each other. The end covers 42 have side planes 45 , and the first connecting plane 43 is in contact with the side planes 45 .

[0094] like Figure 1 、 3 As shown in Figures 5 and 6, the end cover 42 can be a block with a certain thickness. The side of the end cover 42 has a side plane 45. The side plane 45 has good flatness and can fit well with the first connecting plane 43, thereby increasing the contact area between the connecting seat 4 and the cylinder body 11, reducing the probability of loosening and shaking, and further improving the connection effect between the electric cylinder 1 and the displacement sensor 2.

[0095] Preferably, a step portion 46 is provided on the outer wall of the cylinder body 11 , and at least one connecting seat 4 is cooperatively connected to two side walls of the step portion 46 .

[0096] like Figure 3 、 5 As shown, the step portion 46 can be a stepped structure formed by the size change between different components of the cylinder body 11. The step portion 46 includes two contact surfaces at an angle. The two contact surfaces of the connecting seat 4 and the step portion 46 are abutted and matched, which can improve the connection strength between the connecting seat 4 and the cylinder body 11 from at least two directions, thereby improving the connection effect between the electric cylinder 1 and the displacement sensor 2 and reducing the probability of loosening and shaking.

[0097] In this embodiment, two connecting seats 4 are spaced apart from each other on the sensor body 21 , and the connecting seat 4 away from the connecting member 3 abuts and cooperates with the step portion 46 .

[0098] Further preferably, a second connecting plane 44 is provided on at least one front side of the connecting seat 4 away from the connecting member 3, and the second connecting plane 44 can fit the side wall of the step portion 46; it is used to realize the connection between the connecting seat 4 and the cylinder body 11 in two directions, which can improve the connection strength and reduce the probability of loosening and shaking.

[0099] Preferably, the connecting seat 4 can move relative to the cylinder body 11 along the movement direction of the first telescopic rod 12. The relative spacing between the connecting seats 4 can be adjusted to install displacement sensors 2 of different lengths, thereby improving the applicability of the device described in this application.

[0100] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An electric cylinder device with a displacement sensor, characterized in that: include: An electric cylinder (1) comprises a cylinder body (11) and a first telescopic rod (12); A displacement sensor (2) is located outside the electric cylinder (1), the displacement sensor (2) comprising a sensor body (21) and a second telescopic rod (22), the sensor body (21) being connected to the cylinder body (11), the first telescopic rod (12) being parallel to the second telescopic rod (22), and a connecting member (3) being connected between the first telescopic rod (12) and the second telescopic rod (22).

2. The electric cylinder device with a displacement sensor according to claim 1, characterized in that: A placement seat (13) is provided on the first telescopic rod (12), and the placement seat (13) includes a first seat body (14) and a second seat body (15) connected to each other, and the second seat body (15) is located on a side of the first seat body (14) away from the cylinder body (11), and the side of the first seat body (14) away from the cylinder body (11) has a placement plane (16), and the placement plane (16) is perpendicular to the movement direction of the first telescopic rod (12).

3. The electric cylinder device with a displacement sensor according to claim 2, characterized in that: The connecting member (3) is provided with a first hole (31) capable of being sleeved and matched with the second seat body (15); the axis of the first hole (31) is parallel to the movement direction of the first telescopic rod (12); the bottom surface of the connecting member (3) is capable of fitting into the placement plane (16); and the size of the first seat body (14) is larger than the inner diameter of the first hole (31).

4. The electric cylinder device with a displacement sensor according to claim 3, characterized in that: The first telescopic rod (12) further comprises a first locking nut (311), the outer peripheral surface of the first telescopic rod (12) is provided with a thread, the first locking nut (311) is threadedly matched with the first telescopic rod (12), and the first seat (14) and the first locking nut (311) respectively clamp the connecting member (3) from both sides.

5. The electric cylinder device with a displacement sensor according to claim 3, characterized in that: The connecting member (3) is further provided with a second hole (32) parallel to and arranged side by side with the first hole (31); a side of the second hole (32) away from the first hole (31) has a mounting notch (321); the mounting notch (321) is used for allowing the second telescopic rod (22) to be laterally inserted into the second hole (32).

6. The electric cylinder device with a displacement sensor according to claim 5, characterized in that: It also includes at least two second locking nuts (322), the outer peripheral surface of the second telescopic rod (22) is provided with a thread, the second locking nuts (322) are threadedly matched with the second telescopic rod (22), and the at least two second locking nuts (322) respectively clamp the connecting member (3) from both sides; And / or, the connecting member (3) is a plate of equal thickness, the connecting member (3) comprises a large head (33) and a small head (34), the first hole (31) is arranged on the large head (33), and the second hole (32) is arranged on the small head (34).

7. The electric cylinder device with a displacement sensor according to claim 1, characterized in that: At least two connection seats (4) are arranged at intervals on the sensor body (21), and the side surfaces of the connection seats (4) are connected to the cylinder body (11).

8. The electric cylinder device with a displacement sensor according to claim 7, characterized in that: A through hole (41) is provided in the middle of the connecting seat (4), and the sensor body (21) is passed through the through hole (41). A first connecting plane (43) is provided on the side of the connecting seat (4), and the first connecting plane (43) can fit the outer wall of the cylinder body (11).

9. The electric cylinder device with a displacement sensor according to claim 8, characterized in that: The cylinder body (11) includes at least two end covers (42) spaced apart from each other, the end covers (42) having side planes (45), and the first connecting plane (43) is in contact with the side planes (45); And / or, the outer wall of the cylinder body (11) is provided with a step portion (46), and at least one of the connecting seats (4) is cooperatively connected to two side walls of the step portion (46); And / or, the connecting seat (4) is capable of moving relative to the cylinder body (11) along the movement direction of the first telescopic rod (12).

10. The electric cylinder device with a displacement sensor according to any one of claims 1 to 9, characterized in that: The displacement sensor (2) is an LVDT displacement sensor; The electric cylinder (1) is signal-connected to the displacement sensor (2).

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