Low-loss straight stroke actuator provided with limiting mechanism

Abstract

The utility model relates to the field of low-loss straight-stroke actuators, in particular to a low-loss straight-stroke actuator with a limiting mechanism, which comprises an actuating outer shell. The device further comprises stroke rods, a telescopic push rod, a limiting ring, a connecting side plate, a connecting rotating shaft, a limiting wheel and a limiting arc groove, the two stroke rods are symmetrically arranged on the left side and the right side of the bottom of the execution outer shell, and the telescopic push rod is arranged in the center of the bottom of the execution outer shell; the telescopic push rod drives the limiting ring to move up and down, the limiting ring drives the connecting side plate to move up and down, the connecting side plate drives the limiting wheel to move up and down through the connecting rotating shaft, and the limiting wheel rolls along the whole body of the stroke rod while moving up and down. In this way, the movement track of the telescopic push rod is limited through mutual connection among the limiting ring, the connecting side plate, the limiting wheel and the stroke rod, the friction force between the limiting wheel and the stroke rod is reduced in the mode that the limiting wheel rolls over the stroke rod, and it is guaranteed that the push rod cannot be blocked due to too large friction force when moving.

Description

Technical Field

[0001] This utility model relates to the field of low-loss linear actuators, and more particularly to a low-loss linear actuator equipped with a limit mechanism. Background Technology

[0002] Electric actuators, also known as electric actuators, use electricity as a power source and have unparalleled advantages over other types of power transmission, such as convenient energy acquisition, fast action, fast signal transmission speed, and the ability to transmit signals over long distances.

[0003] Common low-loss linear actuators only include a limit function for the push rod. They can limit the movement trajectory of the push rod by sliding the limit block and the stroke rod. However, they lack the function of preventing obstruction. They cannot guarantee that the push rod will not be obstructed when it moves due to excessive friction between the limit block and the stroke rod. It is easy for the push rod to move while simultaneously causing the limit block to slide along the periphery of the stroke rod. However, excessive friction between the limit block and the stroke rod will cause excessive resistance to the push rod when it moves, which will affect the service life of the actuator.

[0004] Therefore, to address the lack of anti-obstruction function in the aforementioned low-loss linear actuators, a low-loss linear actuator with a limiting mechanism can be designed. The telescopic push rod drives the limiting ring to move up and down, which in turn drives the connecting side plate to move up and down. The connecting side plate, in turn, drives the limiting wheel to move up and down via a connecting shaft. While moving up and down, the limiting wheel rolls along the circumference of the stroke rod. This interconnection between the limiting ring, connecting side plate, limiting wheel, and stroke rod limits the movement trajectory of the telescopic push rod. Furthermore, the rolling of the limiting wheel around the stroke rod reduces friction between them, ensuring that the push rod's movement is not obstructed by excessive friction. Utility Model Content

[0005] To overcome the common problem of low-loss linear actuators lacking anti-obstruction function, which cannot guarantee that the push rod will not be obstructed when moving due to excessive friction between the limit block and the stroke rod, the push rod may move while simultaneously causing the limit block to slide along the periphery of the stroke rod. However, excessive friction between the limit block and the stroke rod will result in excessive resistance to the push rod during movement, affecting the service life of the actuator.

[0006] The technical solution of this utility model is as follows: a low-loss linear actuator with a limiting mechanism, including an actuator housing; it also includes a stroke rod, a telescopic push rod, a limiting ring, a connecting side plate, a connecting shaft, a limiting wheel, and a limiting arc groove. Two stroke rods are symmetrically arranged on the left and right sides of the bottom of the actuator housing, and a telescopic push rod is arranged at the center of the bottom of the actuator housing. A limiting ring is fitted around the bottom of the telescopic push rod. Four connecting side plates are symmetrically arranged at the front and rear ends of the left and right sides of the limiting ring. A connecting shaft is rotatably connected to the side of the two connecting side plates near the stroke rod. A limiting wheel is fitted around the connecting shaft, and a limiting arc groove is formed around the limiting wheel.

[0007] Preferably, the telescopic push rod drives the limiting ring to move up and down, the limiting ring drives the connecting side plate to move up and down, and the connecting side plate drives the limiting wheel to move up and down via the connecting shaft. While moving up and down, the limiting wheel rolls along the circumference of the stroke rod. This interconnection between the limiting ring, connecting side plate, limiting wheel, and stroke rod limits the movement trajectory of the telescopic push rod. Furthermore, the rolling of the limiting wheel around the stroke rod reduces friction between them, ensuring that the push rod's movement is not hindered by excessive friction. This addresses the common problem in low-loss linear actuators that only include a limiting function for the push rod. While they can limit the push rod's movement trajectory through the sliding connection between the limiting block and the stroke rod, they lack anti-obstruction functionality. They cannot guarantee that the push rod's movement will not be hindered by excessive friction between the limiting block and the stroke rod. This can easily lead to the push rod simultaneously driving the limiting block to slide along the stroke rod, but excessive friction between the limiting block and the stroke rod results in excessive resistance during push rod movement, affecting the actuator's lifespan.

[0008] Preferably, the limiting ring is connected to the telescopic push rod by bolts, and a rubber sleeve is fitted inside the limiting arc groove.

[0009] Preferably, the entire body of the travel rod is inserted into the interior of the limiting arc groove, and the limiting wheel is slidably connected to the travel rod.

[0010] Preferably, the bottom ends of the two travel rods are provided with mounting rings, and the top of the mounting rings are provided with fixing holes at equal intervals.

[0011] Preferably, the left side of the actuator housing is provided with the motor housing, and the actuator housing and the motor housing are integrated by injection molding.

[0012] Preferably, a control panel is provided on the front side of the actuator housing, and a hand crank is rotatably connected to the bottom right side of the actuator housing.

[0013] Preferably, the bottom end of the telescopic push rod is connected to a connecting rod, and the bottom end of the connecting rod is provided with a switch gate.

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

[0015] 1. The telescopic push rod drives the limiting ring to move up and down, which in turn drives the connecting side plate to move up and down. The connecting side plate, in turn, drives the limiting wheel to move up and down via the connecting shaft. As the limiting wheel moves up and down, it rolls along the circumference of the stroke rod. This interconnection between the limiting ring, connecting side plate, limiting wheel, and stroke rod limits the movement trajectory of the telescopic push rod. Furthermore, the rolling of the limiting wheel over the stroke rod reduces friction between them, ensuring that the push rod's movement is not hindered by excessive friction. This addresses the common problem in low-loss linear actuators that only limit the push rod's movement. While they can limit the push rod's movement through the sliding connection between the limiting block and the stroke rod, they lack anti-obstruction functionality. They cannot guarantee that the push rod's movement will not be hindered by excessive friction between the limiting block and the stroke rod. This can lead to the push rod simultaneously driving the limiting block to slide along the stroke rod, but excessive friction between the limiting block and the stroke rod results in excessive resistance during push rod movement, affecting the actuator's lifespan. Attached Figure Description

[0016] Figure 1 The diagram shown is a schematic representation of the overall structure of the low-loss linear actuator with a limiting mechanism according to this utility model.

[0017] Figure 2 The diagram shown is a schematic representation of the housing structure of the low-loss linear actuator of this utility model, which is equipped with a limiting mechanism.

[0018] Figure 3 The diagram shown is a schematic of the mounting ring structure of the low-loss linear actuator with a limiting mechanism according to this utility model.

[0019] Figure 4 The diagram shown is an exploded view of the limiting component of the low-loss linear actuator with a limiting mechanism according to this utility model.

[0020] Explanation of reference numerals in the attached drawings: 1. Actuating housing; 2. Travel rod; 3. Telescopic push rod; 4. Limit ring; 5. Connecting side plate; 6. Connecting shaft; 7. Limit wheel; 8. Limit arc groove; 9. Rubber sleeve; 10. Mounting ring; 11. Fixing hole; 12. Motor housing; 13. Control panel; 14. Hand crank; 15. Connecting rod; 16. Switch gate. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0022] Please see Figures 1-4This utility model provides an embodiment of a low-loss linear actuator with a limiting mechanism, comprising an actuator housing 1; and further comprising a stroke rod 2, a telescopic push rod 3, a limiting ring 4, a connecting side plate 5, a connecting shaft 6, a limiting wheel 7, and a limiting arc groove 8. Two stroke rods 2 are symmetrically arranged on the left and right sides of the bottom of the actuator housing 1. A telescopic push rod 3 is located at the center of the bottom of the actuator housing 1. A limiting ring 4 is fitted around the bottom of the telescopic push rod 3. Four connecting side plates 5 are symmetrically arranged at the front and rear ends of the left and right sides of the limiting ring 4. A connecting shaft 6 is rotatably connected to the side of the two connecting side plates 5 closest to the stroke rod 2. A limiting wheel 7 is fitted around the connecting shaft 6. A limiting arc groove 8 is formed around the limiting wheel 7. The telescopic push rod 3 drives the limiting ring 4 to move up and down, which in turn drives the connecting side plate 5 to move up and down. The connecting side plate 5, in turn, drives the limiting wheel 7 to move up and down via the connecting shaft 6. While moving up and down, it rolls along the circumference of the travel rod 2. This limitation of the telescopic push rod 3's movement trajectory is achieved through the interconnection of the limiting ring 4, connecting side plate 5, limiting wheel 7, and travel rod 2. Furthermore, the limiting wheel 7 rolling over the travel rod 2 reduces friction between them, ensuring the push rod's movement is not hindered by excessive friction. This addresses the common problem of low-loss linear actuators that only include a limiting function for the push rod, limiting its movement trajectory through the sliding connection between the limiting block and the travel rod. However, these actuators lack anti-obstruction functionality and cannot guarantee that the push rod's movement will not be hindered by excessive friction between the limiting block and the travel rod. This can lead to the push rod simultaneously causing the limiting block to slide along the travel rod, but excessive friction between the limiting block and the travel rod results in excessive resistance during push rod movement, affecting the actuator's lifespan.

[0023] Please see Figures 2-4 In this embodiment, a motor housing 12 is provided on the left side of the actuator housing 1. The actuator housing 1 and the motor housing 12 are integrated by injection molding. A control panel 13 is provided on the front side of the actuator housing 1. A hand crank 14 is rotatably connected to the bottom right side of the actuator housing 1. A connecting rod 15 is connected to the bottom end of the telescopic push rod 3. A switch gate 16 is provided at the bottom end of the connecting rod 15. The actuator is started by the control panel 13. The actuator controls the telescopic push rod 3 to move up or down. When the actuator is damaged and cannot be used, the internal mechanical structure can be operated by rotating the hand crank 14, thereby controlling the telescopic push rod 3 to move up or down.

[0024] Please see Figures 1-4In this embodiment, the limiting ring 4 is connected to the telescopic push rod 3 by bolts. A rubber sleeve 9 is fitted inside the limiting arc groove 8. The entire body of the stroke rod 2 is inserted into the limiting arc groove 8. The limiting wheel 7 is slidably connected to the stroke rod 2. The bottom ends of the two stroke rods 2 are provided with mounting rings 10. The top of the mounting rings 10 is provided with fixing holes 11 at equal intervals. The telescopic push rod 3 drives the limiting ring 4 to move up and down. The limiting ring 4 drives the connecting side plate 5 to move up and down. The connecting side plate 5 drives the limiting wheel 7 to move up and down through the connecting shaft 6. While moving up and down, the limiting wheel 7 will move along the stroke rod. The travel rod 2 rolls around its body, thus limiting the movement trajectory of the telescopic push rod 3 through the interconnection between the limiting ring 4, connecting side plate 5, limiting wheel 7 and travel rod 2. The limiting wheel 7 rolls over the travel rod 2 to reduce the friction between them, ensuring that the push rod will not be obstructed during movement due to excessive friction. This achieves the anti-obstruction function and prevents the push rod from simultaneously causing the limiting block to slide along the travel rod during movement. However, excessive friction between the limiting block and the travel rod would cause excessive resistance to the push rod during movement, affecting the service life of the actuator.

[0025] During operation, the actuator is activated via control panel 13. The actuator controls the telescopic push rod 3 to move up or down. When the actuator is damaged and unusable, the internal mechanical structure can be operated by rotating hand crank 14, thereby controlling the telescopic push rod 3 to move up or down. The telescopic push rod 3 drives the limiting ring 4 to move up and down, which in turn drives the connecting side plate 5 to move up and down. The connecting side plate 5, in turn, drives the limiting wheel 7 to move up and down via connecting shaft 6. While moving up and down, the limiting wheel 7 rolls around the stroke rod 2. In this way, the movement trajectory of the telescopic push rod 3 is limited by the interconnection between the limiting ring 4, the connecting side plate 5, the limiting wheel 7, and the stroke rod 2. Furthermore, the friction between the limiting wheel 7 and the stroke rod 2 is reduced by the limiting wheel 7 rolling over them, ensuring that the push rod will not be obstructed due to excessive friction, thus achieving the anti-obstruction function.

[0026] Through the above steps, the telescopic push rod 3 drives the limiting ring 4 to move up and down, the limiting ring 4 drives the connecting side plate 5 to move up and down, and the connecting side plate 5 drives the limiting wheel 7 to move up and down via the connecting shaft 6. While moving up and down, the limiting wheel 7 rolls along the circumference of the travel rod 2. In this way, the interconnection between the limiting ring 4, the connecting side plate 5, the limiting wheel 7, and the travel rod 2 limits the movement trajectory of the telescopic push rod 3. Furthermore, the rolling of the limiting wheel 7 around the travel rod 2 reduces the friction between them, ensuring that the push rod does not move due to friction. To address the issue of excessive friction hindering the movement of a common low-loss linear actuator, this design only includes a limit function for the push rod. It limits the push rod's movement trajectory through a sliding connection between the limit block and the stroke rod, but lacks an anti-obstruction function. It cannot guarantee that the push rod will not be obstructed during movement due to excessive friction between the limit block and the stroke rod. This can easily lead to the push rod simultaneously causing the limit block to slide along the entire perimeter of the stroke rod. However, excessive friction between the limit block and the stroke rod results in excessive resistance during push rod movement, affecting the actuator's lifespan.

Claims

1. A low-loss linear actuator equipped with a limit mechanism, comprising an actuator housing (1); characterized in that: It also includes a stroke rod (2), a telescopic push rod (3), a limit ring (4), a connecting side plate (5), a connecting shaft (6), a limit wheel (7), and a limit arc groove (8). Two stroke rods (2) are symmetrically arranged on the left and right sides of the bottom of the actuator housing (1). A telescopic push rod (3) is arranged at the center of the bottom of the actuator housing (1). A limit ring (4) is fitted around the bottom of the telescopic push rod (3). Four connecting side plates (5) are symmetrically arranged at the front and rear ends of the left and right sides of the limit ring (4). A connecting shaft (6) is rotatably connected to the side of the two connecting side plates (5) near the stroke rod (2). A limit wheel (7) is fitted around the connecting shaft (6). A limit arc groove (8) is opened around the limit wheel (7).

2. The low-loss linear actuator with a limiting mechanism according to claim 1, characterized in that: The limiting ring (4) is connected to the telescopic push rod (3) by bolts, and the inner side of the limiting arc groove (8) is fitted with a rubber sleeve (9).

3. The low-loss linear actuator with a limiting mechanism according to claim 1, characterized in that: The entire body of the stroke rod (2) is inserted into the interior of the limiting arc groove (8), and the limiting wheel (7) is slidably connected to the stroke rod (2).

4. The low-loss linear actuator with a limiting mechanism according to claim 1, characterized in that: The bottom ends of the two stroke rods (2) are provided with mounting rings (10), and the top of the mounting rings (10) are provided with fixing holes (11) at equal intervals.

5. The low-loss linear actuator with a limiting mechanism according to claim 1, characterized in that: A motor housing (12) is provided on the left side of the execution housing (1), and the execution housing (1) and the motor housing (12) are integrated by injection molding.

6. The low-loss linear actuator with a limiting mechanism according to claim 1, characterized in that: A control panel (13) is provided on the front side of the execution housing (1), and a hand crank (14) is rotatably connected to the bottom right side of the execution housing (1).

7. The low-loss linear actuator with a limiting mechanism according to claim 1, characterized in that: The bottom end of the telescopic push rod (3) is connected to a connecting rod (15), and the bottom end of the connecting rod (15) is provided with a switch gate (16).

Images