Push rod structure

Abstract

The push rod structure comprises a box body, a sliding cavity with an opening in one side is formed in the box body, a sliding block is installed in the sliding cavity, a pushing part is arranged on the side, facing the opening of the sliding cavity, of the sliding block, a threaded hole is formed in the sliding block in a penetrating mode in the sliding direction of the sliding block, and a power input end is arranged on the box body. The power input end is provided with a lead screw meshed with the threaded hole, the lead screw is arranged in parallel in the sliding direction of the sliding block, and the power input end drives the lead screw to rotate so as to drive the sliding block to move. Through the meshing design of the threaded hole in the sliding block and the lead screw, the lead screw is rotated to drive the sliding block to move, the sliding block can be driven to move by an enough distance even if the threaded hole is not very long, the push rod device is more compact in structure and higher in transmission efficiency, and simplification and miniaturization of a push rod mechanism can be better achieved. And meanwhile, the stability and the precision of the movement of the push rod are ensured by lead screw transmission.

Description

Technical Field

[0001] The utility model belongs to the field of electromechanical equipment, and in particular relates to a push rod structure. Background Art

[0002] As a common mechanical transmission component, actuators are widely used in various automated equipment and mechanical systems. Traditional actuators typically use mechanical linkages, gears, or screws to achieve linear motion, meeting the needs of equipment such as pushing, positioning, or clamping. However, with the continuous advancement of industrial technology and the expansion of application areas, traditional actuator designs have gradually exposed some problems.

[0003] In the prior art, as shown in the patent with publication number CN111623097A, the application discloses a push rod structure and an electric push rod. The push rod structure includes a push rod body and a movable plug. The movable plug is slidably disposed in the inner cavity of the push rod body and is sealed with the inner wall of the push rod body. The movable plug divides the inner cavity of the push rod body into a first chamber and a second chamber. The first chamber is used to accommodate the telescopic actuator of the electric push rod, and the push rod body has an air hole connecting the second chamber and the outside world. The combination of the screw rod and the screw rod nut in this application takes up a lot of space, because at least the screw rod and the screw rod nut must be of equal length, or the length of the screw rod must exceed a part of the nut to achieve the pushing function.

[0004] Therefore, traditional push rod mechanisms are often complex in structure and occupy a large space, which is not conducive to the miniaturization and integration of equipment. In modern production lines, equipment is compact and space is limited, so the simplification and miniaturization of push rod mechanisms have become an urgent need. Utility Model Content

[0005] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a push rod structure.

[0006] In order to achieve the above purpose, the technical solution of the utility model is:

[0007] A push rod structure includes a box body, a sliding cavity with a single-side opening is opened in the box body, a sliding block is installed in the sliding cavity, the sliding block is provided with a pushing portion facing the opening side of the sliding cavity, a threaded hole is opened on the sliding block along the sliding direction of the sliding block, a power input end is provided on the box body, a screw engaged with the threaded hole is installed on the power input end, the screw is arranged parallel to the sliding direction of the sliding block, and the power input end drives the screw to rotate, thereby driving the sliding block to move.

[0008] Preferably, the sliding block is a bar-shaped block, a first sliding portion is provided at one end of the sliding block, a first optical axis parallel to the lead screw is installed in the sliding cavity corresponding to the first sliding portion, and the first sliding portion is slidably sleeved on the radial outer wall of the first optical axis.

[0009] Preferably, the first sliding portion includes a mounting cavity provided in the sliding block, the mounting cavity is open on both sides along the sliding direction of the sliding block, a linear bearing is installed in the mounting cavity, and the linear bearing is slidably sleeved on the radial outer wall of the first optical axis.

[0010] Preferably, an installation step is provided on the inner side of one opening of the installation cavity, and an annular groove is provided on the inner side wall of the other opening, and a self-locking limit piece is installed in the annular groove.

[0011] Preferably, a second sliding portion is provided at the other end of the sliding block, a second optical axis parallel to the lead screw is installed in the sliding cavity corresponding to the second sliding portion, and the second sliding portion is slidably sleeved on the radial outer wall of the second optical axis.

[0012] Preferably, the pushing part includes a screw mounted on the sliding block, the screw can be adjusted to a length screwed into the sliding block, one end of the screw is screwed into the sliding block, and the other end is installed with a ball head, a ball shell is rotatably mounted on the ball head, and an external thread is provided on the outer wall of the ball shell.

[0013] Preferably, a detection block is installed on the sliding block, and a distance measurement module is installed in the sliding cavity corresponding to the detection block.

[0014] Preferably, the detection block is a displacement magnet, and the distance measurement module includes at least one Hall sensor arranged along the sliding direction of the sliding block.

[0015] Preferably, the detection block is a ranging protrusion, and the ranging module is at least one ranging sensor arranged corresponding to the detection protrusion.

[0016] After adopting the above technical solution, the push rod structure provided by the utility model has the following beneficial effects compared with the prior art.

[0017] (1) The present invention utilizes a threaded hole on the sliding block that engages with a lead screw, and the lead screw is rotated to drive the sliding block to move. The threaded hole does not need to be very long to drive the sliding block to move a sufficient distance, making the push rod device more compact and more efficient, thereby enabling better simplification and miniaturization of the push rod mechanism. At the same time, the lead screw drive ensures the smoothness and precision of the push rod movement, thereby improving the stability and reliability of the push rod device during operation.

[0018] (2) The present invention achieves stable sliding of the sliding block by providing a sliding portion on the sliding block and installing an optical axis parallel to the lead screw in the sliding cavity. The design of the optical axis improves the stability of the sliding block during movement and also improves the motion accuracy of the push rod device.

[0019] (3) The utility model installs a linear bearing in the installation cavity, so that the sliding block slides more smoothly on the first optical axis, reduces friction loss, improves the operation accuracy of the push rod structure, and maintains the operation accuracy as much as possible.

[0020] (4) The utility model realizes the stable installation and effective limitation of the linear bearing by setting the installation step and the annular groove and installing the self-locking limiter, thereby preventing the sliding block and the linear bearing from shaking and falling off during the sliding process, and improving the reliability of the push rod structure.

[0021] (5) The present invention further enhances the stability of the sliding block by providing a second sliding portion at the other end of the sliding block and installing a second optical axis parallel to the lead screw, so that the push rod structure can still maintain good operating performance when subjected to a large load.

[0022] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings are part of the present invention and are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention but do not constitute an improper limitation of the present invention. Obviously, the drawings described below are only some embodiments. For those skilled in the art, other drawings can be obtained based on these drawings without inventive work. In the drawings:

[0024] Figure 1 This is a schematic diagram of the external structure of the utility model;

[0025] Figure 2 It is a schematic diagram of the internal structure of the utility model;

[0026] Figure 3 This is a schematic diagram of the push rod structure of the utility model;

[0027] Figure 4 This is a schematic diagram of the sliding cavity of the utility model;

[0028] Figure 5 This is a schematic diagram of the external structure of the sliding block of the utility model;

[0029] Figure 6 It is a schematic diagram of the internal structure of the sliding block of the utility model.

[0030] In the figure: 1. Drive motor; 11. Output shaft; 12. Rotor; 13. Stator; 14. End cover; 15. Angle magnet; 16. Angle detection module; 2. Push rod structure; 21. Housing; 211. Sliding cavity; 212. Sliding block; 2121. First sliding portion; 21211. Mounting cavity; 21212. Linear bearing; 21213. Mounting step; 21214. Annular groove; 21215. Self-locking limiter. 2122, second sliding part; 213, lead screw; 214, first optical axis; 215, second optical axis; 216, detection block; 217, distance measurement module; 218, pushing part; 2181, screw; 2182, ball head; 2183, ball shell; 2184, ball cover; 22, mounting cover; 3, power transmission part; 31, first bevel gear; 32, second bevel gear; 4, reducer; 41, input end; 42, output end.

[0031] It should be noted that these drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but rather to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0033] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions 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 direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0034] In the description of this utility model, it should be noted that, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; and direct connections or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.

[0035] 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 the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" means two or more, unless otherwise specifically defined.

[0036] Traditional actuators often struggle to meet the demands of precise control of actuator position. Due to mechanical transmission errors and instabilities, traditional actuators struggle to maintain accurate motion. This performance issue is particularly pronounced under high-speed, high-precision operating conditions.

[0037] To overcome these issues, researchers have begun exploring new actuator designs. With the advancement of motor control technology, electric actuators have gradually emerged. Electric actuators utilize a motor as their power source, converting the motor's rotational motion into linear motion through a transmission mechanism. Compared to traditional mechanical actuators, electric actuators offer advantages such as simple structure, high transmission efficiency, and superior control precision.

[0038] However, while electric linear actuators have improved the issues of traditional linear actuators to a certain extent, some challenges still exist. For example, how to further optimize the design of the transmission mechanism to improve the smoothness and precision of the linear actuator's movement; how to achieve precise control of the linear actuator's movement to meet the needs of different application scenarios; and how to ensure the linear actuator's stability and reliability under high load and high speed conditions.

[0039] Example 1

[0040] like Figures 1 to 6 As shown, the utility model provides a push rod structure 2, including a box body 21, a sliding cavity 211 with a single-side opening is opened in the box body 21, a sliding block 212 is installed in the sliding cavity 211, and the sliding block 212 is provided with a pushing portion 218 facing the opening side of the sliding cavity 211, and a threaded hole is opened on the sliding block 212 along the sliding direction of the sliding block 212. A power input end 41 is provided on the box body 21, and a screw 213 engaged with the threaded hole is installed on the power input end 41. The screw 213 is arranged parallel to the sliding direction of the sliding block 212, and the power input end 41 drives the screw 213 to rotate, thereby driving the sliding block 212 to move.

[0041] By meshing the threaded hole in the sliding block 212 with the lead screw 213, the sliding block 212 can be moved by rotating the lead screw 213. The threaded hole does not need to be very long to achieve sufficient movement of the sliding block 212. This makes the push rod device more compact and improves transmission efficiency, thereby further simplifying and miniaturizing the push rod mechanism. Furthermore, the drive of the lead screw 213 ensures the smoothness and precision of the push rod movement, improving the stability and reliability of the push rod device during operation.

[0042] Preferably, the sliding block 212 is a bar-shaped block, and a first sliding portion 2121 is provided at one end of the sliding block 212. A first optical axis 214 parallel to the screw 213 is installed in the sliding cavity 211 corresponding to the first sliding portion 2121, and the first sliding portion 2121 is slidably sleeved on the radial outer wall of the first optical axis 214.

[0043] By providing a first sliding portion 2121 on the sliding block 212 and installing a first optical axis 214 parallel to the lead screw 213 within the sliding cavity 211, stable sliding of the sliding block 212 is achieved. The design of the first optical axis 214 improves the operational stability of the sliding block 212 during movement and also improves the motion accuracy of the push rod device.

[0044] Furthermore, the first sliding portion 2121 includes a mounting cavity 21211 defined within the sliding block 212. The mounting cavity 21211 is open on both sides along the sliding direction of the sliding block 212. A linear bearing 21212 is mounted within the mounting cavity 21211. The linear bearing 21212 is slidably mounted on the radial outer wall of the first optical axis 214. Preferably, the linear bearing 21212 can be a self-lubricating bearing to improve wear resistance and reduce friction between the bearing and the optical axis.

[0045] Preferably, a mounting step 21213 is provided on the inner side of one opening of the mounting cavity 21211, and an annular groove 21214 is provided on the inner sidewall of the other opening. A self-locking stopper 21215 for limiting the movement of the linear bearing 21212 is installed in the annular groove 21214. During installation, the linear bearing 21212 is placed against the mounting step 21213, and the self-locking stopper 21215 is inserted into the annular groove 21214 to complete the installation. The opening formed by the mounting step 21213 and the opening on the other side of the sliding portion are both larger than the diameter of the optical axis. Furthermore, the self-locking stopper 21215 can be a retaining spring, an expansion baffle, an expansion retaining ring, or other components, depending on the specific application, and will not be described in detail here.

[0046] Further preferably, the sliding block 212 is provided with a first sliding portion 2121 at one end and a second sliding portion 2122 at the other end. A second optical axis 215 parallel to the lead screw 213 is mounted within the sliding cavity 211 corresponding to the second sliding portion 2122. The second sliding portion 2122 is slidably sleeved on the radial outer wall of the second optical axis 215. The internal configuration of the second sliding portion 2122 is the same as that of the first sliding portion 2121, and both contain linear bearings 21212 for sliding guidance.

[0047] More preferably, the inner wall curved surface of the mounting cavity 21211 of the first sliding portion 2121 and the second sliding portion 2122 is offset toward the outside of the sliding block 212 to form an arc-shaped protrusion to accommodate the mounting cavity 21211 for installing the linear bearing 21212, while leaving sufficient material to support the linear bearing 21212. Furthermore, an arc-shaped avoidance groove is provided in the sliding cavity 211 corresponding to the arc-shaped protrusion, and the sliding cavity 211 forms a contoured avoidance space for the entire sliding block 212, and the box body 21 does not contact the sliding block 212.

[0048] By providing a second sliding portion 2122 at the other end of the sliding block 212 and installing a second optical axis 215 parallel to the lead screw 213, the stability of the sliding block 212 is further enhanced, allowing the push rod structure 2 to maintain good operating performance even under heavy loads. In this way, the load of the sliding block 212 is borne by the two optical axes, and the lead screw 213 only plays a driving role, optimizing the design and improving the operational stability of the push rod device.

[0049] A detection block 216 is mounted on the sliding block 212, and a distance measurement module 217 is mounted within the sliding cavity 211 in correspondence with the detection block 216. By installing the detection block 216 on the sliding block 212 and the distance measurement module 217 within the sliding cavity 211, the movement position of the sliding block 212 can be detected in real time. The rotation of the drive motor 1 is controlled based on the detected position, achieving precise control of the motion state of the push rod device. This design achieves closed-loop control of the push rod device, improving control accuracy and reliability, enabling it to meet the requirements of high-precision applications.

[0050] Preferably, detection block 216 is a displacement magnet, and distance measurement module 217 includes at least one Hall effect sensor positioned along the sliding direction of slider 212. Furthermore, preferably, multiple Hall effect sensors may be positioned along the sliding direction of slider 212, collectively forming distance measurement module 217 to achieve even more precise detection. The combination of the displacement magnets enables displacement detection with rapid response and high measurement accuracy, further improving the control accuracy and performance of the push rod device.

[0051] Alternatively, the detection block 216 may be a distance measuring protrusion (not shown in the figure, but installed in the same position as the displacement magnet), and the distance measuring module 217 may be at least one distance measuring sensor (not shown in the figure, but installed in the same position as the Hall effect sensor) corresponding to the detection protrusion. In this way, the accuracy of displacement detection depends on the accuracy of the distance measuring sensor, and the installation process is simpler, which can simplify production steps and improve production efficiency.

[0052] The present application improves push rod structure 2 to achieve the goal of rotating lead screw 213 to drive the movement of sliding block 212. The threaded hole in the portion driving sliding block 212 does not need to be very long to achieve sufficient movement of sliding block 212. This makes the push rod device more compact and improves transmission efficiency, thereby further simplifying and miniaturizing the push rod mechanism. At the same time, the transmission of lead screw 213, combined with the two optical axis guides and load-bearing functions, ensures the smoothness and precision of the push rod movement, thereby improving the stability and reliability of the push rod device during operation.

[0053] Furthermore, the threaded hole does not need to pass through the entire sliding block 212 , and a thread length sufficient to bear the driving force of the screw 213 is sufficient. The remaining portion can be processed into a through hole with a diameter greater than the maximum diameter of the screw 213 .

[0054] At the same time, position detection of the sliding block 212 is added to realize closed-loop control of driving and detection, thereby further improving the motion accuracy of the push rod.

[0055] In the present application, the installation positions at both ends of the motor output shaft 11 and the installation positions of the lead screw 213 and the box body 21 are provided with bearings. This is a conventional setting in the field and will not be elaborated on here.

[0056] like Figure 2 and Figure 3 As shown, the pusher 218 includes a screw 2181 mounted on the sliding block 212. The length of the screw 2181 screwed into the sliding block 212 can be adjusted. One end of the screw 2181 is screwed into the sliding block 212, and the other end is mounted with a ball head 2182. The ball head 2182 is rotatably mounted with a ball housing 2183. The outer wall of the ball housing 2183 is provided with external threads. Furthermore, after the ball housing 2183 is mounted on the ball head 2182, a ball cover 2184 is added to cooperate with the ball housing 2183 to achieve universal rotation.

[0057] By designing a screw rod 2181 with adjustable length as the pushing portion 218 and providing a ball head 2182 and a ball shell 2183 , the push rod structure 2 can adapt to pushed objects of different shapes and sizes, thereby improving the versatility and flexibility of the push rod structure 2 .

[0058] Furthermore, in order to adapt to application scenarios such as installation in the control part of a hydraulic valve, the push rod device is provided with a mounting cover 22 on the opening side of the box body 21, and a push rod opening is provided on the mounting cover 22. A sealing ring mounting position is provided at the push rod opening for installing a sealing ring used in conjunction with the hydraulic valve.

[0059] The inner end surface of the installation cover plate 22 is a single-side limiting surface of the sliding block 212 , and the side wall of the sliding cavity 211 opposite to the installation cover plate 22 is the other-side limiting surface of the sliding block 212 .

[0060] Example 2

[0061] Based on Example 1, the output shaft 11 of the drive motor 1 of this embodiment is set perpendicular to the pushing direction of the push rod structure 2, and the power transmission part 3 includes a first bevel gear 31 and a second bevel gear 32 that are meshed with each other. The output shaft 11 is connected to the first bevel gear 31, and the screw 213 is installed on the second bevel gear 32.

[0062] Further preferably, a reducer 4 is provided between the drive motor 1 and the power transmission unit 3. The reducer 4 includes an input end 41 and an output end 42. A reduction gear set is provided between the input end 41 and the output end 42. The input end 41 is connected to the output shaft 11 of the drive motor 1, and the output end 42 is connected to the second bevel gear 32 of the power transmission unit 3. The output shaft 11 of the drive motor 1 rotates, transmitting the decelerated torque to the lead screw 213, driving the sliding block 212 to move. By providing the reducer 4 between the drive motor 1 and the power transmission unit 3, the speed of the drive motor 1 can be effectively reduced, the output torque can be increased, and the push rod device can adapt to the requirements of different loads and working speeds. At the same time, the reducer 4 can also reduce energy loss during power transmission and improve the transmission efficiency of the push rod device.

[0063] Specifically, the drive motor 1 includes a rotor 12, a stator 13 and an output shaft 11. The rotor 12 is arranged around the rotation axis of the output shaft 11. The rotor 12 is covered and installed on the outer wall of the middle section of the output shaft 11. The entire inner wall of the rotor 12 coincides with part of the outer wall of the output shaft 11. The output shaft 11 and the rotor 12 are fixedly connected and can rotate synchronously. The stator 13 is arranged on the radial outside of the rotor 12 and is arranged around the axis to at least ensure that the axial length of the stator 13 is consistent with the axial length of the rotor 12, or the axial length of the stator 13 exceeds the axial length of the rotor 12. An annular gap is formed between the stator 13 and the rotor 12. When the stator 13 is energized, it generates a magnetic field to drive the rotor 12 to drive the output shaft 11 to rotate.

[0064] Example 3

[0065] To further address the accuracy issue, this embodiment, based on the first or second embodiment, can replace the drive motor 1 with a stepper motor. Using a stepper motor as the drive motor 1 can achieve precise step control, making the movement of the push rod device more accurate and stable. Precise rotation control is performed at the power output end 42, further ensuring the accuracy of the entire control chain.

[0066] Alternatively, since stepper motors are generally expensive, high procurement costs will directly lead to an increase in the overall design cost. Therefore, an angle sensor can be installed on the output shaft 11 of the drive motor 1 as an alternative to further reduce costs while ensuring accuracy.

[0067] Specifically, an end cap 14 is provided on the upper side of the drive motor 1, and the tail end of the output shaft 11 of the drive motor 1 extends into the end cap 14. An angle magnet 15 is installed at the tail end of the output shaft 11. The center of the angle magnet 15 is on the rotation axis of the output shaft 11. An angle detection module 16 is provided corresponding to the angle magnet 15. The angle detection module 16 includes at least one Hall sensor installed in the end cap 14. Further preferably, multiple Hall sensors can be provided along the sliding direction of the sliding block 212. The multiple Hall sensors together constitute the angle detection module 16 to achieve more accurate detection. In this way, by detecting the rotation angle and number of rotations of the output shaft 11, in conjunction with the distance measurement module 217, dual detection is achieved, further improving the control accuracy of the push rod.

[0068] Example 4

[0069] Based on the above embodiments, this embodiment provides a control system that is applied to the push rod device described in the above embodiments. Application of the control system to the push rod device enables automated control and intelligent management of the push rod device. The control system receives control commands from a control terminal and controls the operation of the push rod device accordingly, thereby improving the operating efficiency and reliability of the push rod device.

[0070] Preferably, the control system includes a position detection module for detecting the rotational position of the drive motor 1 and the movement position of the slider 212. This position detection module in the control system can detect the rotational position of the drive motor 1 and the movement position of the slider 212 in real time, providing data support for precise control of the control system. Through accurate position detection, the control system can monitor and adjust the motion state of the push rod assembly in real time, improving the control accuracy and stability of the push rod assembly.

[0071] Preferably, the control system further includes a control module for receiving control instructions from the control terminal and controlling the movement of the push rod device according to the instructions. The communication method between the control module and the control terminal adopts wired communication and / or wireless communication. Specifically, wired communication can be controlled by means of cables, network cables, optical fibers, and other communication methods. If the distance is short, direct control can be achieved using cables or network cables. If the control distance is long, control can be achieved by using optical fibers or other ultra-long-distance transmission cables. Wireless communication can adopt short-range control methods such as Bluetooth and WiFi. Mobile communication systems can also be installed and used with terminals such as mobile phones for control. Specifically, handwheel controllers, tap controllers, mobile phones, tablets, etc. can be used as control terminals.

[0072] The control module communicates with the control terminal via wired and / or wireless communication, making the control system more flexible and convenient to operate. Users can remotely control the movement of the push rod device through the control terminal, enabling remote monitoring and management of the push rod device, improving the ease of use and operability of the push rod device.

[0073] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0074] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as above with preferred embodiments, it is not intended to limit the present invention. Any technician familiar with this patent can make some changes or modifications to equivalent embodiments with equivalent changes using the above-mentioned technical contents without departing from the scope of the technical solution of the present invention. The implementation schemes in the above embodiments can also be further combined or replaced. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the solution of the present invention.

Claims

1. A push rod structure, comprising a box (21), characterized in that: A sliding cavity (211) with a single-side opening is provided in the box body (21), a sliding block (212) is installed in the sliding cavity (211), a pushing portion (218) is provided on the sliding block (212) facing the opening side of the sliding cavity (211), a threaded hole is provided on the sliding block (212) along the sliding direction of the sliding block (212), a power input end (41) is provided on the box body (21), a lead screw (213) engaged with the threaded hole is installed on the power input end (41), the lead screw (213) is arranged parallel to the sliding direction of the sliding block (212), and the power input end (41) drives the lead screw (213) to rotate, thereby driving the sliding block (212) to move.

2. The push rod structure according to claim 1, characterized in that: The sliding block (212) is a bar-shaped block, and a first sliding portion (2121) is provided at one end of the sliding block (212). A first optical axis (214) parallel to the lead screw (213) is installed in the sliding cavity (211) corresponding to the first sliding portion (2121), and the first sliding portion (2121) is slidably sleeved on the radial outer wall of the first optical axis (214).

3. The push rod structure according to claim 2, characterized in that: The first sliding portion (2121) comprises an installation cavity (21211) opened in the sliding block (212), the installation cavity (21211) being open on both sides along the sliding direction of the sliding block (212), a linear bearing (21212) being installed in the installation cavity (21211), and the linear bearing (21212) being slidably sleeved on the radial outer wall of the first optical axis (214).

4. The push rod structure according to claim 3, characterized in that: An installation step (21213) is provided on the inner side of one opening of the installation cavity (21211), and an annular groove (21214) is provided on the inner side wall of the other opening, wherein a self-locking limiter (21215) is installed in the annular groove (21214).

5. The push rod structure according to claim 2, characterized in that: The other end of the sliding block (212) is provided with a second sliding portion (2122), and a second optical axis (215) parallel to the lead screw (213) is installed in the sliding cavity (211) corresponding to the second sliding portion (2122), and the second sliding portion (2122) is slidably sleeved on the radial outer wall of the second optical axis (215).

6. The push rod structure according to claim 1, characterized in that: The pushing portion (218) comprises a screw rod (2181) mounted on the sliding block (212); the length of the screw rod (2181) screwed into the sliding block (212) can be adjusted; one end of the screw rod (2181) is screwed into the sliding block (212); the other end is provided with a ball head (2182); a ball shell (2183) is rotatably mounted on the ball head (2182); and an external thread is provided on the outer wall of the ball shell (2183).

7. The push rod structure according to any one of claims 1 to 6, characterized in that: A detection block (216) is installed on the sliding block (212), and a distance measurement module (217) is installed in the sliding cavity (211) corresponding to the detection block (216).

8. The push rod structure according to claim 7, characterized in that: The detection block (216) is a displacement magnet, and the distance measurement module (217) comprises at least one Hall sensor arranged along the sliding direction of the sliding block (212).

9. The push rod structure according to claim 7, characterized in that: The detection block (216) is a distance measuring protrusion, and the distance measuring module (217) is at least one distance measuring sensor arranged corresponding to the detection protrusion.

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