An electric cylinder to prevent lead screw from swinging

Abstract

This utility model belongs to the field of electric cylinder technology, and particularly relates to an electric cylinder for preventing lead screw swing, comprising a cylinder body, a piston rod, a limiting block, a lead screw, and a nut. The electric cylinder for preventing lead screw swing provided by this application, by setting a limiting block inside the piston rod and fixing one end of the lead screw to the limiting block, effectively constrains and fixes the tail end of the lead screw, reducing or even avoiding the swinging phenomenon caused by excessive stroke during operation, thus ensuring the stability of the lead screw operation. Because the lead screw swing is effectively controlled, the meshing accuracy between the lead screw and the nut is improved, making the transmission of the electric cylinder smoother and more precise, improving the positioning accuracy of the electric cylinder, and meeting the requirements of high transmission accuracy in working scenarios. It also reduces the additional friction and energy loss caused by lead screw swing, making the power transmission between the lead screw and the nut more efficient, improving the working efficiency of the electric cylinder, and extending the service life of the lead screw and the nut.

Description

Technical Field

[0001] This utility model belongs to the field of electric cylinder technology, and in particular relates to an electric cylinder that prevents the lead screw from swinging. Background Technology

[0002] Electric cylinders, as actuators that convert rotary motion into linear motion, are widely used in many fields such as machinery manufacturing, automated production lines, and robotics. They mainly rely on the threaded engagement of a lead screw and a nut to convert the rotary motion output by the motor into the linear motion of the piston rod, thereby achieving the pushing and pulling action on the load.

[0003] In traditional electric cylinder structures, the lead screw is typically connected to the drive unit at one end, while the other end is in a free state or limited only by a simple support structure. When the electric cylinder needs to achieve a longer stroke, the length of the lead screw increases accordingly. During high-speed rotation and reciprocating motion, the tail end of the lead screw, lacking effective constraint and fixation, is prone to radial swaying. This swaying has several adverse effects: firstly, it significantly reduces the meshing accuracy between the lead screw and nut, leading to a decrease in the transmission accuracy of the electric cylinder, making precise positioning control impossible and affecting the equipment's working quality; secondly, the swaying exacerbates friction and wear between the lead screw and nut, not only reducing transmission efficiency and increasing energy loss but also shortening the service life of both the lead screw and nut. Utility Model Content

[0004] The purpose of this invention is to provide an electric cylinder that prevents the lead screw from swinging, thereby solving the technical problems in the prior art that result in inaccurate positioning control, reduced transmission efficiency, and shortened service life of the lead screw and nut.

[0005] To achieve the above objectives, the present invention provides an electric cylinder for preventing lead screw swing, comprising a cylinder body, a piston rod, a limiting block, a lead screw, and a nut. The piston rod is movably inserted through the cylinder body, and the limiting block is fixed inside the piston rod and disposed on the lead screw. The lead screw is movably disposed inside the piston rod, and one end is fixed to the limiting block, which fixes one end of the lead screw and prevents it from swinging. The nut is threaded onto the outside of the lead screw and fixedly connected to the piston rod. The nut converts the rotational motion of the lead screw into linear motion, thereby driving the piston rod to move linearly.

[0006] As an optional solution of this utility model, a fixing seat is provided at one end of the cylinder body, and the fixing seat is fixedly connected to the cylinder body.

[0007] As an optional solution of this utility model, a connector is provided at one end of the piston rod, and the connector is fixedly connected to the piston rod.

[0008] As an optional solution of this utility model, a limiting ring is provided in the cylinder body, the limiting ring is fixedly connected to the cylinder body, and the limiting ring and the nut are partially overlapped along the axial direction of the lead screw.

[0009] As an optional solution of this utility model, a limiting protrusion is provided at one end of the lead screw, the limiting protrusion is fixedly connected to the lead screw and is provided on one side of the limiting block.

[0010] The electric cylinder for preventing lead screw swing provided in this utility model embodiment has at least one of the following technical effects:

[0011] The electric cylinder for preventing lead screw swing provided in this application effectively constrains and fixes the tail end of the lead screw by setting a limiting block inside the piston rod and fixing one end of the lead screw to the limiting block. This reduces or even avoids the swinging phenomenon caused by excessive stroke of the lead screw during operation, ensuring the stability of the lead screw operation. Because the lead screw swing is effectively controlled, the meshing accuracy between the lead screw and the nut is improved, making the transmission of the electric cylinder smoother and more precise, improving the positioning accuracy of the electric cylinder, and meeting the working scenarios with high requirements for transmission accuracy. It also reduces the additional friction and energy loss caused by lead screw swing, making the power transmission between the lead screw and the nut more efficient, improving the working efficiency of the electric cylinder, and extending the service life of the lead screw and the nut. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 A perspective view of an electric cylinder for preventing lead screw from swinging, provided for an embodiment of this utility model.

[0014] Figure 2 A perspective view of an electric cylinder for preventing lead screw from swinging, provided for an embodiment of this utility model.

[0015] Figure 3 A side view of an electric cylinder for preventing lead screw swing provided in an embodiment of this utility model.

[0016] Figure 4 for Figure 3 A magnified view of a portion of AA.

[0017] The following are the labeling elements in the figure:

[0018] 1. Cylinder block; 2. Piston rod; 3. Limiting block; 4. Lead screw; 5. Nut;

[0019] 11. Fixing base; 12. Limiting ring;

[0020] 21. Connector;

[0021] 41. Limiting protrusion. Detailed Implementation

[0022] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the embodiments of this utility model, and should not be construed as limiting the utility model.

[0023] In the description of the embodiments of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0024] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0025] In this embodiment of the invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention according to the specific circumstances.

[0026] In one embodiment of this utility model, such as Figures 1-4 As shown, an electric cylinder is provided to prevent the lead screw from swinging, including a cylinder body 1, a piston rod 2, a limit block 3, a lead screw 4, and a nut 5.

[0027] The piston rod 2 is movably inserted through the cylinder body 1 and can reciprocate linearly along the axial direction within the cylinder body 1. The limiting block 3 is fixed inside the piston rod 2, specifically by welding or bolt connection. The limiting block 3 is located at one end of the lead screw 4, fixing that end of the lead screw 4 and thus constraining the lead screw 4 to prevent it from swinging during operation.

[0028] The lead screw 4 is movably mounted inside the piston rod 2. One end of the lead screw 4 is fixed to the limiting block 3, and the other end can be connected to an external drive motor (not shown in the figure). Under the drive of the drive motor, the lead screw 4 rotates. The nut 5 is threaded onto the outside of the lead screw 4 and is fixedly connected to the piston rod 2. Specifically, the nut 5 can be connected by a key or by welding. When the lead screw 4 rotates, the nut 5 can convert the rotational motion of the lead screw 4 into its own linear motion, thereby driving the piston rod 2 to move linearly along the cylinder 1.

[0029] A fixing seat 11 is provided at one end of the cylinder body 1. The fixing seat 11 is fixedly connected to the cylinder body 1 by bolts. The setting of the fixing seat 11 facilitates the installation and fixing of the electric cylinder to external equipment and improves the stability of the electric cylinder during operation.

[0030] A connector 21 is provided at one end of the piston rod 2. The connector 21 is fixedly connected to the piston rod 2 by means of threaded connection or welding. The connector 21 is used to connect to an external load to facilitate the movement of the load.

[0031] A limit ring 12 is provided inside the cylinder body 1. The limit ring 12 is fixedly connected to the cylinder body 1 by an interference fit. The limit ring 12 and the nut 5 are partially overlapped along the axial direction of the lead screw 4. The limit ring 12 can limit the movement of the nut 5, preventing the nut 5 from exceeding the preset range during movement, and avoiding equipment damage caused by excessive extension or retraction of the piston rod 2.

[0032] One end of the lead screw 4 is provided with a limiting protrusion 41, which is integrally formed with the lead screw 4 and is a fixed connection. The limiting protrusion 41 is located on one side of the limiting block 3. The limiting protrusion 41 can further enhance the connection reliability between the lead screw 4 and the limiting block 3, prevent the lead screw 4 from falling off the limiting block 3, and also play a certain limiting role in the axial movement of the lead screw 4.

[0033] The working principle of this embodiment is as follows: When the external drive motor drives the lead screw 4 to rotate, since the nut 5 is fixedly connected to the piston rod 2 and the nut 5 is threadedly engaged with the lead screw 4, the rotational motion of the lead screw 4 is converted into linear motion by the nut 5. The nut 5 drives the piston rod 2 to perform axial reciprocating linear motion along the cylinder body 1. During the rotation and movement of the lead screw 4, since one end of the lead screw 4 is fixed on the limiting block 3 inside the piston rod 2, the limiting block 3 effectively constrains the lead screw 4, avoiding the swinging phenomenon caused by the long stroke of the lead screw 4. At the same time, the limiting ring 12 restricts the range of motion of the nut 5, ensuring the safety of the piston rod 2's movement; the fixed seat 11 and the connector 21 facilitate the installation and fixation of the electric cylinder and the connection with the load, respectively; the limiting protrusion 41 further enhances the stability of the connection between the lead screw 4 and the limiting block 3.

[0034] The electric cylinder for preventing lead screw swing provided in this application effectively constrains and fixes the tail end of the lead screw 4 by setting a limiting block 3 inside the piston rod 2 and fixing one end of the lead screw 4 to the limiting block 3. This reduces or even avoids the swinging phenomenon of the lead screw 4 due to excessive stroke during operation, ensuring the stability of the lead screw 4's operation. Since the swinging of the lead screw 4 is effectively controlled, the meshing accuracy between the lead screw 4 and the nut 5 is improved, making the transmission of the electric cylinder smoother and more precise, improving the positioning accuracy of the electric cylinder, and meeting the working scenarios with high transmission accuracy requirements. It also reduces the additional friction and energy loss caused by the swinging of the lead screw 4, making the power transmission between the lead screw 4 and the nut 5 more efficient, improving the working efficiency of the electric cylinder, and extending the service life of the lead screw 4 and the nut 5.

[0035] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An electric cylinder for preventing lead screw from swinging, characterized in that, The device includes a cylinder body, a piston rod, a limiting block, a lead screw, and a nut. The piston rod is movably inserted through the cylinder body. The limiting block is fixed inside the piston rod and positioned on the lead screw. The lead screw is movably disposed inside the piston rod, with one end fixed to the limiting block. The limiting block fixes one end of the lead screw and prevents it from swinging. The nut is threaded onto the outside of the lead screw and is fixedly connected to the piston rod. The nut converts the rotational motion of the lead screw into linear motion, thereby driving the piston rod to move linearly.

2. The electric cylinder for preventing lead screw swing according to claim 1, characterized in that, A fixing seat is provided at one end of the cylinder body, and the fixing seat is fixedly connected to the cylinder body.

3. An electric cylinder for preventing lead screw swing according to claim 1, characterized in that, A connector is provided at one end of the piston rod, and the connector is fixedly connected to the piston rod.

4. An electric cylinder for preventing lead screw swing according to claim 1, characterized in that, A limit ring is provided inside the cylinder body, and the limit ring is fixedly connected to the cylinder body. The limit ring and the nut are partially overlapped along the axial direction of the lead screw.

5. An electric cylinder for preventing lead screw swing according to claim 1, characterized in that, One end of the lead screw is provided with a limiting protrusion, which is fixedly connected to the lead screw and located on one side of the limiting block.

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