Built-in force measuring structure of servo electric cylinder

Abstract

The utility model discloses a built-in force measuring structure of a servo electric cylinder, which comprises a servo electric cylinder body, a main shaft mounted in the servo electric cylinder body, a force measuring sensor mounted at the end of the main shaft, a mounting rod elastically mounted at the end of the main shaft, and a mounting seat mounted on the mounting rod through extrusion of an object, the thrust of an object is transmitted to the force measuring sensor through the mounting rod, so that the thrust is measured, the force measuring sensor can be ensured to be stably positioned in the end part of the main shaft, and meanwhile, the thrust of the object can be ensured to be stably output to the force measuring sensor by concentrating the force of the pushed object through the mounting seat mounted on the mounting rod; the servo electric cylinder body is used for guaranteeing stability and accuracy of the force transducer, the wire can be always located in the main shaft by controlling the moving process of the main shaft, the wire is always arranged in the servo electric cylinder body, interference of objects or other assemblies on the wire is prevented, and the wire is protected.

Description

Technical Field

[0001] The utility model relates to the technical field of servo electric cylinders, in particular to a built-in force measuring structure of a servo electric cylinder. Background Art

[0002] The servo electric cylinder is a modular product that integrates a servo motor and a lead screw. It has the characteristics of low cost and flexible configuration. It is the best alternative to hydraulic cylinders and pneumatic cylinders and is widely used in industries such as industry, military, entertainment facilities, and automobiles.

[0003] When the existing servo electric cylinder is working, it controls the movement of the object by moving the main shaft. When it is necessary to measure the force applied by the servo electric cylinder to the moving object, the force sensor is generally installed between the servo electric cylinder and the workpiece. The force sensor needs to be exposed on the outside of the main shaft. When the middle of the pushed object deviates from the main shaft, it is easy to cause inaccurate measured values, affecting the measurement accuracy. Utility Model Content

[0004] The purpose of the present invention is to provide a built-in force measuring structure for a servo electric cylinder to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solution: a built-in force measuring structure of a servo electric cylinder, comprising a servo electric cylinder body, a main shaft installed inside the servo electric cylinder body, a force sensor installed at the end of the main shaft, a mounting rod elastically installed at the end of the main shaft, the end of the mounting rod is in extrusion contact with the measuring rod of the force sensor, and a wire is installed inside the main shaft.

[0006] As a further preferred embodiment of the present technical solution, a receiving groove is provided at the end of the main shaft.

[0007] As a further preferred embodiment of the present technical solution, mounting holes are provided on the outer side of the end portion of the main shaft in a ring array with the central axis of the main shaft as the axis, and bolt holes are provided on the end portion of the main shaft in a ring array with the central axis of the main shaft as the axis, the mounting holes are connected to the bolt holes, and bolt rods are equidistantly installed at the bottom end of the mounting rod, the bolt rods are arranged through the bolt holes, and a nut is threadedly installed on the end portion of the bolt rod, and the nut is located inside the mounting hole.

[0008] As a further preferred embodiment of the present technical solution, a wire taking-up groove is provided inside the main shaft, the wire is arranged inside the wire taking-up groove, one end of the wire is electrically connected to the force sensor, and the other end of the wire is electrically connected to the controller.

[0009] As a further preferred embodiment of the present technical solution, both ends of the wire are respectively fixed to the outer wall of the servo electric cylinder body of the main shaft.

[0010] As a further preferred embodiment of the present technical solution, the conductive wire is a spring spiral wire.

[0011] The utility model provides a built-in force measurement structure of a servo electric cylinder, which has the following beneficial effects:

[0012] (1) The utility model is installed on the mounting rod by squeezing the object, and the thrust of the object will be transmitted to the force sensor through the mounting rod to achieve thrust measurement, which can ensure that the force sensor is stably located inside the end of the main shaft. At the same time, the force of the pushed object is concentrated by the mounting rod installed on the mounting rod, which can ensure that the thrust of the object is stably output to the force sensor, which is used to ensure the stability and accuracy of the force sensor;

[0013] (2) The utility model controls the movement of the main shaft so that the wire can always be inside the main shaft, and is used to always place the wire inside the servo electric cylinder body to prevent objects or other components from interfering with the wire, thereby protecting the wire. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 It is a partial cross-sectional structural schematic diagram of the utility model;

[0016] Figure 3 This is a schematic diagram of a partial cross-sectional explosion structure of the utility model;

[0017] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0018] Figure 5 for Figure 2 Enlarged view of point B in the middle;

[0019] In the figure: 1. Servo cylinder body; 2. Spindle; 3. Force sensor; 4. Mounting rod; 5. Wire; 6. Storage slot; 7. Mounting hole; 8. Bolt hole; 9. Bolt rod; 10. Nut; 11. Wire take-up slot. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0021] The utility model provides a technical solution: Figures 1 to 5As shown, in this embodiment, the built-in force measuring structure of the servo electric cylinder includes a servo electric cylinder body 1, a main shaft 2 is installed inside the servo electric cylinder body 1, and a force sensor 3 is installed at the end of the main shaft 2. The model of the force sensor 3 is EVT-20F. A mounting rod 4 is elastically installed at the end of the main shaft 2. The end of the mounting rod 4 is in squeeze contact with the measuring rod of the force sensor 3. A wire 5 is installed inside the main shaft 2. The mounting seat installed on the mounting rod 4 is squeezed by the object, and the thrust of the object will be transmitted to the force sensor 3 through the mounting rod 4 to achieve thrust measurement, which can ensure that the force sensor 3 is stably located inside the end of the main shaft 2. At the same time, the force of the pushed object is concentrated by the mounting seat installed on the mounting rod 4, which can ensure that the thrust of the object is stably output to the force sensor 3, which is used to ensure the stability and accuracy of the force sensor 3. During the process of controlling the movement of the main shaft 2, the wire 5 can always be inside the main shaft 2, which is used to always place the wire 5 inside the servo electric cylinder body 1 to prevent objects or other components from interfering with the wire 5, thereby protecting the wire 5.

[0022] like Figures 1 to 5 As shown, a receiving groove 6 is provided at the end of the main shaft 2 .

[0023] It is used to store and position the force sensor 3 to prevent the force sensor 3 from being squeezed and offset.

[0024] like Figures 1 to 5 As shown, the outer side of the end of the main shaft 2 is provided with mounting holes 7 in a ring array with the central axis of the main shaft 2 as the axis, and the end of the main shaft 2 is provided with bolt holes 8 in a ring array with the central axis of the main shaft 2 as the axis. The mounting holes 7 are connected to the bolt holes 8, and the bottom end of the mounting rod 4 is equidistantly provided with bolt rods 9, and the bolt rods 9 are provided through the bolt holes 8. The end of the bolt rod 9 is threadedly installed with a nut 10, and the nut 10 is located inside the mounting hole 7.

[0025] The mounting rod 4 is mounted on the end of the main shaft 2 by means of bolts. When squeezed by an object, the main shaft 2 and the mounting rod 4 may be misaligned, thereby providing space for the displacement of the measuring end of the force sensor 3 .

[0026] like Figures 1 to 5 As shown, a wire taking-up groove 11 is provided inside the main shaft 2, and the wire 5 is arranged inside the wire taking-up groove 11. One end of the wire 5 is electrically connected to the force sensor 3, and the other end of the wire 5 is electrically connected to the controller.

[0027] It is used to limit the position of the wire 5 to prevent the wire 5 from slipping out of the interior of the main shaft 2.

[0028] like Figures 1 to 5As shown, both ends of the wire 5 are fixed to the outer wall of the servo cylinder body 1 of the main shaft 2.

[0029] The two ends of the wire 5 can be fixed to prevent the two ends of the wire 5 from being bent and damaged during the long-term movement of the main shaft 2.

[0030] like Figures 1 to 5 As shown, the conductor 5 is a spring spiral wire.

[0031] The height of the wire 5 can be reduced during the retraction of the main shaft 2 to prevent the wire 5 from interfering with the support seat on which the main shaft 2 is installed inside the servo electric cylinder body 1.

[0032] The utility model provides a built-in force measurement structure of a servo electric cylinder. The specific working principle is as follows:

[0033] When the device is in use, when pushing an object, the object squeezes the mounting seat installed on the mounting rod 4, and the thrust of the object is transmitted to the force sensor 3 through the mounting rod 4 to achieve thrust measurement, which can ensure that the force sensor 3 is stably located inside the end of the main shaft 2. At the same time, the force of the pushed object is concentrated by the mounting seat installed on the mounting rod 4, which can ensure that the thrust of the object is stably output to the force sensor 3, so as to ensure the stability and accuracy of the force sensor 3.

[0034] During the process of controlling the movement of the main shaft 2, the wire 5 can always be inside the main shaft 2, which is used to always place the wire 5 inside the servo cylinder body 1 to prevent objects or other components from interfering with the wire 5 and protect the wire 5.

[0035] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A servo electric cylinder built-in force measuring structure, comprising a servo electric cylinder body (1), wherein a main shaft (2) is installed inside the servo electric cylinder body (1), characterized in that: A force sensor (3) is installed at the end of the main shaft (2), a mounting rod (4) is elastically installed at the end of the main shaft (2), the end of the mounting rod (4) is in extrusion contact with the measuring rod of the force sensor (3), and a wire (5) is installed inside the main shaft (2).

2. The built-in force measurement structure of the servo electric cylinder according to claim 1, characterized in that: A receiving groove (6) is provided at the end of the main shaft (2).

3. The built-in force measurement structure of the servo electric cylinder according to claim 2, characterized in that: The outer side of the end of the main shaft (2) is provided with a mounting hole (7) in a ring array with the central axis of the main shaft (2) as the axis, and the end of the main shaft (2) is provided with a bolt hole (8) in a ring array with the central axis of the main shaft (2) as the axis. The mounting hole (7) is connected to the bolt hole (8). Bolt rods (9) are equidistantly installed at the bottom end of the mounting rod (4). The bolt rods (9) pass through the bolt holes (8). A nut (10) is threadedly installed at the end of the bolt rod (9), and the nut (10) is located inside the mounting hole (7).

4. The built-in force measurement structure of the servo electric cylinder according to claim 3, characterized in that: A wire taking-up groove (11) is provided inside the main shaft (2), and the wire (5) is arranged inside the wire taking-up groove (11). One end of the wire (5) is electrically connected to the force sensor (3), and the other end of the wire (5) is electrically connected to the controller.

5. The built-in force measurement structure of the servo electric cylinder according to claim 4, characterized in that: The two ends of the wire (5) are respectively fixed to the outer wall of the servo electric cylinder body (1) of the main shaft (2).

6. The built-in force measurement structure of the servo electric cylinder according to claim 5, characterized in that: The conducting wire (5) is a spring helical wire.

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