A single-column electric actuator

Abstract

This utility model relates to a single-column electric push rod, including a push rod assembly and a housing for mounting the push rod assembly on a loading trolley. The push rod assembly includes a motor, a lead screw, a guide shaft, a push plate, a push ring, and a detection rod. The motor is installed inside the housing. One end of the lead screw is connected to the output shaft of the motor. At least one guide shaft is provided. The lead screw and guide shaft pass through the push plate. A push ring is provided on the outer periphery of the push plate and is fixed to the push plate. Multiple bearings a are provided below the push ring. Limit switches are provided at both ends of the detection rod to detect the position of the push plate's movement stroke. This achieves a compact structure, stable guidance, and accurate pushing function.

Description

Technical Field

[0001] This utility model relates to the field of logistics equipment technology, and in particular to a single-column electric push rod. Background Technology

[0002] Currently, automated material handling equipment is widely used in intelligent manufacturing, logistics and material handling, and pharmaceutical feeding. Among them, electric linear actuators, as important actuators for achieving linear drive and precise displacement control, are typically used for lifting, pushing, or positioning materials or workpieces.

[0003] In the existing technology, most common electric linear actuator structures adopt multi-section telescopic mechanisms or slide rail slider structures. Although they can achieve basic push and pull actions, they still have certain shortcomings in terms of structural compactness, guiding stability and component integration.

[0004] Furthermore, some existing technologies introduce flexible transmission structures to improve force application accuracy. For example, Chinese patent CN118659578A incorporates elastic elements such as springs, bellows, or shape memory alloys in the transmission mechanism, or uses a non-rigid connection between the force application end and the transmission mechanism. While such structures offer some buffering and compensation capabilities in certain light-load control scenarios, they are prone to introducing positional errors, resulting in poor pushing stability. They also suffer from complex structures, numerous components, and poor environmental adaptability. In addition, these products often rely on pressure sensors and software control logic for closed-loop regulation, making the detection feedback highly susceptible to external interference and hindering the achievement of highly stable and reliable pushing control. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a single-column electric push rod that is stable in guidance and easy to install with the loading vehicle. This push rod aims to solve the problems of uneven pushing process, easy shaking of the guide, and poor connection compatibility of traditional push rods in practical applications.

[0006] The technical solution adopted by this utility model to solve its technical problem is: a single-column electric push rod, including a push rod assembly and a housing for mounting the push rod assembly on a loading trolley. The push rod assembly includes a motor, a lead screw, an optical shaft, a detection rod, a push plate, and a push ring. The motor is installed in the housing. One end of the lead screw is connected to the output shaft of the motor. At least one optical shaft is provided. The lead screw and the optical shaft pass through the push plate. A push ring is provided on the outer periphery of the push plate. The push ring is fixed to the push plate. Multiple bearings a are provided below the push ring. Limit switches are provided at both ends of the detection rod.

[0007] Furthermore, a bushing is provided between the push plate and the lead screw, and the bushing has an internal thread that matches the lead screw.

[0008] Furthermore, the bottom of the push plate is provided with an integrally formed boss structure, which includes an extension section and a positioning section. The positioning section is embedded in the push ring and fixed to the push ring by fasteners, and the extension section extends outward from the push plate out of the housing.

[0009] Furthermore, the housing includes a mounting base, a single-column cylinder, and a front cover plate. The mounting base is provided with a connector and mounting holes for connecting to a loading trolley. The single-column cylinder is a hollow structure, with one end connected to the mounting base and the other end connected to the front cover plate. A longitudinal notch is provided at the bottom of the single-column cylinder, and the extension of the push plate is placed in the notch. The single-column cylinder is also provided with multiple holes that cooperate with bearing a. The front cover plate is provided with through holes that cooperate with the lead screw and optical shaft.

[0010] Furthermore, the push plate is provided with a groove, the detection rod is positioned opposite to the groove, and the inner side of the push ring is provided with a recess that matches the size of bearing a. The push ring is arranged on bearing a on the single column cylinder through the recess.

[0011] Furthermore, the limit switch includes a Hall effect limit sensor and a limit baffle. The push plate is provided with a positioning piece for triggering the Hall effect limit sensor, and the limit baffles are respectively disposed at both ends of the detection rod.

[0012] Furthermore, a bearing b is provided on the inner side of the front cover plate, and the lead screw passes through the bearing b and rotates with it.

[0013] Furthermore, bearing a is a bullseye bearing, and bearing b is a deep groove ball bearing.

[0014] The beneficial effects of this utility model are:

[0015] This invention improves guiding stability by setting a bushing structure between the push plate and the optical axis, and setting a lead screw guide bearing at the front cover plate, which effectively enhances the guiding accuracy of the push plate during reciprocating motion and avoids mechanical interference or displacement error caused by shaking.

[0016] This invention enables smooth pushing. A bullseye wheel is provided between the push ring and the housing, and a bearing b is provided inside the front cover plate to support the rotation of the lead screw. Together, they form a complete guiding and support system, ensuring that the push rod runs smoothly and with low friction during the driving process, significantly improving the smoothness and consistency of the overall pushing.

[0017] This utility model is easy to install with a loading trolley. The housing is equipped with a standardized mounting base and connector structure, which can be directly connected to the base of the loading trolley. The interface is clear and the positioning is accurate, which reduces assembly errors and alignment difficulties and improves the system's matching efficiency. Attached Figure Description

[0018] Figure 1This is a front view of the single-column electric actuator structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the push rod assembly structure of this utility model;

[0020] Figure 3 This is a schematic diagram of the push plate and push ring structure of this utility model;

[0021] Figure 4 This is a bottom view of the single-column electric actuator structure of this utility model;

[0022] Figure 5 This is a schematic diagram of the fit between the bearing b and the lead screw of this utility model;

[0023] In the diagram: 1-Housing; 11-Mounting base; 111-Connector; 112-Mounting hole; 12-Single column cylinder; 13-Front end cover; 2-Push rod assembly; 21-Motor; 22-Lead screw; 23-Optical axis; 24-Detection rod; 241-Limit switch; 25-Push plate; 251-Extension section; 252-Positioning section; 26-Push ring; 3-Bushing; 4-Bearing a; 5-Bearing b. Detailed Implementation

[0024] The present invention will now be further described with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0025] like Figure 1 and Figure 4 As shown, this utility model provides a single-column electric actuator, including a housing 1 and an actuator assembly 2 disposed inside the housing 1. The housing 1 is used to install the actuator assembly 2 onto a loading trolley, and its structure includes a mounting base 11, a single-column cylinder 12, and a front end cover 13. The mounting base 11 is provided with a connector 111 and multiple mounting holes 112 for connecting and fixing to the loading trolley base components. Preferably, the connector 111 is an interface structure for electrical connection, which is electrically connected to the control system of the loading trolley below through a connecting wire to form a control circuit; the mounting holes 112 are mechanical connection parts, which can be detachably installed to the loading trolley platform by screws or bolts. The single column cylinder 12 is a hollow structure, with one end connected to the mounting base 11 and the other end connected to the front cover plate 13. The bottom of the single column cylinder 12 is provided with a longitudinal notch, and the extension of the push plate 25 is placed in the notch. The single column cylinder 12 is also provided with multiple holes that cooperate with the bearing a4. The front cover plate 13 is provided with through holes that cooperate with the lead screw 22 and the optical shaft 23.

[0026] like Figure 2As shown, the push rod assembly 2 of this utility model includes a motor 21, a lead screw 22, an optical shaft 23, a detection rod 24, a push plate 25, and a push ring 26. The lead screw 22 is a rotary drive rod with external threads. One end is connected to the output shaft of the motor 21 and is driven by the motor 21 to achieve rotation. The other end passes through the front cover plate 13 and is embedded and supported within the front cover plate to ensure its rotational freedom. The optical shaft 23 is a smooth guide rod. In this embodiment, two shafts are provided, located on both sides directly above the lead screw 22 and arranged parallel to the lead screw. Both ends of the optical shaft 23 pass through corresponding through holes on the front cover plate 13. These through holes have a countersunk structure, the size of which is adapted to the shank of the fastening screw. The nut end of the screw is located in the planar area outside the through hole. The fastening screw passes through the through hole from the outside and is directly screwed into the threaded hole at the end of the optical shaft 23, thereby achieving a reliable connection and fixation between the optical shaft and the front cover plate 13. In this way, the optical axis 23 remains stable after assembly, which can provide stable support and constraint for the linear guiding motion of the push plate 25, and improve the smoothness and anti-swaying ability of the pushing process.

[0027] The detection rod 24 is positioned above the lead screw 22 and the optical axis 23, extending laterally through the rod in a direction perpendicular to the lead screw. Limit switches 241 are located at both ends of the rod to detect the travel distance of the push plate 25. Each limit switch 241 includes a Hall effect limit sensor located at both ends of the detection rod 24 and a corresponding limit baffle. The Hall effect limit sensor is fixed to both ends of the detection rod 24 via pin soldering and is used to sense magnetic positioning signals from the push plate.

[0028] To facilitate sensing, the push plate 25 is equipped with a positioning plate, which is a metal sheet structure located within the sensing area of ​​the Hall sensor. When the push plate 25 moves to a set position, the positioning plate approaches the corresponding Hall sensor, triggering a sensing signal output, thus achieving precise end-point detection and position identification. The positioning plate is installed in a pre-drilled threaded hole on the top surface of the push plate 25 using screws, ensuring secure installation and accurate positioning.

[0029] Furthermore, to prevent material from tilting or impacting during transportation, the detection rod 24 is also equipped with a limiting baffle. The limiting baffle is a one-piece molded triangular block structure, which passes through the optical axis 23 and the detection rod 24 on both sides. The limiting baffle on one side is located at the top of the pusher's movement path, with its front end extending outward to form a material positioning stop surface, which can guide and limit the position of the rolled material forklift; the limiting baffle on the other side extends inward to form a buffer isolation with the loading vehicle body, effectively preventing the material from contacting and rubbing against the vehicle body during the pushing process, thus improving operational safety and equipment durability.

[0030] Furthermore, such as Figure 2 and Figure 3As shown, the push plate 25 is an integral structure with three through holes inside, through which the lead screw 22 and the optical shaft 23 pass. A bushing 3 is installed in the through hole through which the lead screw 22 passes. The inner side of the bushing 3 has a thread that mates with the lead screw 22. The lead screw 22 passes through the internally threaded bushing 3, achieving threaded engagement. To improve the guiding stability and smooth sliding of the push plate 25, the two through holes through which the optical shaft 23 passes are slightly larger than the diameter of the optical shaft, allowing the push plate 25 to slide with low friction under the guidance of the optical shaft 23, while avoiding jamming or wear due to excessive tightness. A groove is provided on the upper part of the push plate 25, and the detection rod 24 is positioned opposite this groove, while the positioning piece is also fixed within this groove. The lower part of the push plate 25 is integrally formed with a boss structure, which includes a positioning section 252 and an extension section 251. The positioning section 252 is embedded in the push ring 26 and fixedly connected to the push ring 26 by fasteners. The extension section 251 extends out from the bottom of the push plate 25 to pass through the lower notch of the housing 1, thereby effectively extending the movement stroke.

[0031] like Figures 1 to 4 As shown, the push ring 26 is an annular structure, fitted around the outer periphery of the push plate 25 and moving with it. Its top inner side has a recess for matching the bearing a4, forming a rolling guide support. The bearing a4 is preferably a bullseye wheel, providing rolling support, and is evenly distributed in the upper region of the single-column cylinder 12. The push ring 26 can be securely mounted on the bearing a4. Multiple bearings a4 provide continuous support tracks in the direction of push rod movement, allowing the entire assembly of the push plate 25 and push ring 26 to be rolled along the bearing a4.

[0032] Furthermore, since the extension 251 of the push plate 25 passes through the notch at the bottom of the single-column cylinder 12 and extends outward from the single-column cylinder 12, and the push ring 26 is always supported by the bearing a at the top during operation, there is no direct contact between the push ring 26 and the cylinder body 12, forming a non-contact sliding state. This structural design avoids frictional wear between the push ring and the cylinder, improving the overall guiding stability and the smoothness of the pushing action.

[0033] like Figure 5 As shown, to ensure stable support and free rotation of the lead screw 22, a bearing b5 is embedded in the through hole corresponding to the lead screw 22 on the front cover plate 13. This bearing is a deep groove ball bearing. The front end of the lead screw 22 passes through the bearing b5 and is embeddedly connected to the front cover plate 13. The lead screw 22 and the bearing b5 have a rotational fit relationship, which ensures the flexibility of the lead screw rotation while restricting its axial movement, so that it can maintain a stable rotational state during the driving process.

[0034] In actual operation, the push ring 26 is initially located at the end of the single-column cylinder 12. The operator places the core material to be pushed onto the single-column cylinder 12 through the through hole in the middle of the core material, so that the push ring 26 contacts the core material, completing the initial loading and positioning. Subsequently, the loading vehicle starts its control system, driving the integral single-column electric push rod structure and the core material mounted on the vehicle body to move vertically upward until the single-column cylinder 12 and the core material reach the desired positioning height. After the position adjustment is completed, the motor 21 starts to drive the lead screw 22 to rotate. The lead screw 22 drives the push plate 25 to move along the lead screw axis through the internal thread bushing 3. Since the push plate 25 is fixedly connected to the push ring 26, the push ring 26 moves upward synchronously, thereby pushing the core material in contact with it to slide forward along the external axis of the single-column cylinder 12. As the pusher plate 25 continues to move, the core gradually detaches from the outer wall covering area of ​​the single-column cylinder 12 until the pusher ring 26 reaches its top position, at which point the core is completely pushed out and separated from the pusher structure. At this point, the entire pushing action is completed, and the device enters standby mode, ready for the next round of material pushing operations.

[0035] Meanwhile, a positioning plate is provided above the push plate 25, which gradually approaches the Hall effect limit sensors arranged at both ends of the detection rod 24 as the push plate moves. When the positioning plate enters the sensor's sensing range, the sensor outputs a signal to identify that the push plate has reached the end of its stroke. This works in conjunction with two limit baffles on the detection rod 24, located at opposite ends of the push plate 25's movement path. One baffle provides a physical limit when the push plate reaches its limit, while the other baffle extends towards the loading trolley to act as a barrier or guide during the push plate's ejection process.

[0036] The above embodiments are only for illustrating the technical concept and features of this utility model. Their purpose is to enable those skilled in the art to understand the content of this utility model and implement it. They should not be used to limit the protection scope of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be covered within the protection scope of this utility model.

Claims

1. A single upright electric trolley comprising a trolley assembly and a housing to mount the trolley assembly to a loader truck, characterised in that: The push rod assembly includes a motor, a lead screw, an optical shaft, a detection rod, a push plate, and a push ring. The motor is installed inside the housing. One end of the lead screw is connected to the output shaft of the motor. There is at least one optical shaft. The lead screw and the optical shaft pass through the push plate. A push ring is provided on the outer periphery of the push plate. The push ring is fixed to the push plate. Multiple bearings a are provided below the push ring. Limit switches are provided at both ends of the detection rod.

2. A single upright electric trolley according to claim 1, characterized in that: A bushing is provided between the push plate and the lead screw, and the bushing has an internal thread that matches the lead screw.

3. A single upright electric trolley according to claim 1, wherein: The bottom of the push plate is provided with an integrally formed boss structure, which includes an extension section and a positioning section. The positioning section is embedded in the push ring and fixed to the push ring by fasteners. The extension section extends outward from the push plate out of the housing.

4. A single upright electric trolley according to claim 1, characterized in that: The housing includes a mounting base, a single-column cylinder, and a front cover plate. The mounting base is provided with a connector and mounting holes for connecting to a loading trolley. The single-column cylinder is a hollow structure, with one end connected to the mounting base and the other end connected to the front cover plate. A longitudinal notch is provided at the bottom of the single-column cylinder, and the extension of the push plate is placed in the notch. The single-column cylinder is also provided with multiple holes that cooperate with bearing a. The front cover plate is provided with through holes that cooperate with the lead screw and optical shaft.

5. A single upright electric trolley according to claim 1, characterized in that: The push plate is provided with a groove, the detection rod is positioned opposite to the groove, and the inner side of the push ring is provided with a recess that matches the size of bearing a. The push ring is arranged on bearing a on the single column cylinder through the recess.

6. A single upright electric trolley according to claim 1, characterized in that: The limit switch includes a Hall effect limit sensor and a limit baffle. The push plate is provided with a positioning piece for triggering the Hall effect limit sensor, and the limit baffles are respectively set at both ends of the detection rod.

7. A single upright electric trolley according to claim 4, wherein: The front cover plate is provided with a bearing b on its inner side, and the lead screw passes through the bearing b and rotates with it.

8. A single upright electric trolley according to claim 7, wherein: Bearing a is a bullseye bearing, and bearing b is a deep groove ball bearing.

Images