A time-delay action cylinder

Abstract

The utility model provides a delay action cylinder, including cylinder body, piston, piston rod, set up delay air valve through on the cylinder body, make it include outer valve body and inner valve body and outer valve core, make outer valve body both ends respectively with cavity and air hole intercommunication, set up first side hole in the lateral wall of outer valve body, make outer valve core remove and be connected with dynamic seal in outer valve body, open the axial through -hole on outer valve core, make inner valve body present step -like and locate in through -hole, form annular cavity between its small diameter end and through -hole, open second side hole with annular cavity intercommunication in its lateral wall, make inner valve core remove and be connected with dynamic seal in inner valve body, set up the elastic member of driving inner valve core in inner valve body and remove the second side hole of plugging, when the air hole ventilates, first drive outer valve core removes to the position of plugging first side hole, then drive inner valve core and remove open second side hole overcoming the elastic force of elastic member, make the air hole and cavity intercommunication, thereby drive piston and piston rod remove, realize delay action.

Description

Technical Field

[0001] This utility model belongs to the field of cylinder technology, specifically relating to a time-delay cylinder. Background Technology

[0002] Cylinders are common driving components in mechanical equipment. By allowing air to enter, they force the piston to move, causing the piston rod to push out or retract, thereby moving the components connected to the piston rod. Generally, the piston rod starts to move after air is introduced. However, in equipment such as drop testers, air-jet looms, and pneumatic robots, it is necessary for the piston rod to pause for a period of time after air is introduced before it moves again. Traditional cylinders cannot meet this requirement, and there is an urgent need for a time-delayed action cylinder. Utility Model Content

[0003] The purpose of this invention is to overcome one or more shortcomings in the prior art and provide a time-delayed action cylinder.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is a time-delay cylinder, including a cylinder body, a piston, and a piston rod. The piston divides the inner cavity of the cylinder body into two independent cavities. The cylinder body has air holes corresponding to and communicating with the cavities. The cylinder body also has a time-delay valve, which includes a tubular outer valve body, an inner valve body, an outer valve core, and an inner valve core. One end of the outer valve body communicates with one of the cavities, and the other end has a sealing plate. The air hole corresponding to the cavity is opened on the sealing plate. The side wall of the outer valve body has a first side hole communicating between the cavity and the outside. The outer valve core... An axially movable element is disposed within the outer valve body, with its outer wall dynamically sealed to the inner wall of the outer valve body. An axially penetrating hole is provided on the outer valve core. The inner valve body is stepped and disposed within the penetrating hole, with its large-diameter end sealed to the penetrating hole and its small-diameter end forming an annular cavity with the penetrating hole. A second side hole communicating with the annular cavity is provided on the side wall of the inner valve body. The inner valve core is axially movable within the inner valve body, with its outer wall dynamically sealed to the inner wall of the inner valve body. An elastic element is provided within the inner valve body to drive the inner valve core to move and block the second side hole.

[0005] Preferably, the through hole is a stepped hole, with its larger end facing the cavity.

[0006] Preferably, the end of the through hole is provided with an inwardly extending annular groove, in which a retaining spring is provided to restrict the axial movement of the inner valve body.

[0007] Preferably, the through hole is located at the center of the outer valve core.

[0008] Preferably, the end of the inner valve body facing the cavity is recessed to form an inner retaining ring, and the end of the inner valve core facing the cavity is recessed to form a guide post, the guide post being movably inserted through the inner retaining ring.

[0009] More preferably, the elastic element is sleeved on the guide post, with its two ends respectively abutting against the inner retaining ring and the inward retraction of the inner valve core.

[0010] Preferably, the first side hole has multiple holes and is evenly distributed around the axis of the outer valve body.

[0011] Preferably, there are multiple second side holes that are evenly distributed around the axis of the inner valve body.

[0012] Preferably, the cylinder body includes two parallel longitudinal cylinders and a transverse cylinder connected to one end of the two longitudinal cylinders. Each longitudinal cylinder is provided with a piston and a piston rod. The transverse cylinder has a connection hole for installing the delay valve in the middle.

[0013] More preferably, an inner liner is connected at the connection between the transverse cylinder and the longitudinal cylinder.

[0014] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art: The delayed-action cylinder provided by this utility model includes a cylinder body, a piston, and a piston rod. A delayed-action valve is installed on the cylinder body, comprising outer and inner valve bodies and outer and inner valve cores. One end of the outer valve body is connected to the cavity, and the other end is provided with a sealing plate with an air hole. A first side hole is provided on the side wall of the outer valve body, allowing the outer valve core to be moved and dynamically sealed within the outer valve body. An axial through hole is provided on the outer valve core, making the inner valve body stepped and located within the through hole, forming an annular cavity between its small-diameter end and the through hole. A second side hole is provided on its side wall, communicating with the annular cavity, allowing the inner valve core to be axially moved and dynamically sealed within the inner valve body. An elastic element is provided within the inner valve body to drive the inner valve core to move and block the second side hole. When air is introduced through the air hole, the outer valve core is first driven to move to the position blocking the first side hole, and then the inner valve core is driven to move over the elastic force of the elastic element to open the second side hole, connecting the air hole to the cavity, thereby driving the piston and piston rod to move and achieve the delayed action. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of a preferred embodiment of the present invention, with a partial cross-sectional view.

[0016] Figure 2 yes Figure 1 The enlarged view at point A shows that the outer valve core is in the first working position and the inner valve core is in the third working position.

[0017] Figure 3 yes Figure 1 The enlarged view at point A shows that the outer valve core is in the second working position and the inner valve core is in the third working position.

[0018] Figure 4 yes Figure 1 The enlarged view at point A shows that the outer valve core is in the second working position and the inner valve core is in the fourth working position.

[0019] The components are as follows: 10. Cylinder body; 11. Cavity; 12. Air port; 13. Longitudinal cylinder barrel; 14. Transverse cylinder barrel; 15. Sealing ring; 16. Linear bearing; 17. Connecting hole; 18. Inner liner tube; 20. Piston; 30. Piston rod; 40. Delay valve; 41. Outer valve body; 411. Sealing plate; 412. First side hole; 42. Inner valve body; 421. Annular cavity; 422. Second side hole; 423. Inner retaining ring; 43. Outer valve core; 431. Through hole; 432. Annular groove; 433. Snap ring; 44. Inner valve core; 441. Guide post; 45. Elastic element. Detailed Implementation

[0020] As shown in the figure Figures 1 to 4As shown, the time-delay cylinder provided by this utility model includes a cylinder body 10, a piston 20, a piston rod 30, and a time-delay valve 40. The piston 20 divides the inner cavity of the cylinder body 10 into two independent cavities 11. The cylinder body 10 has air holes 12 that communicate with the cavities 11. The time-delay valve 40 is disposed on the cylinder body 10 and includes a tubular outer valve body 41, an inner valve body 42, an outer valve core 43, and an inner valve core 44. One end of the outer valve body 41 is connected to one of the cavities 11. One end is connected to the other end, and a sealing plate 411 is provided. The air hole 12 corresponding to the cavity 11 is opened at the center of the sealing plate 411. The side wall of the outer valve body 41 is provided with a first side hole 412 connecting the cavity 11 to the outside. The outer valve core 43 is axially movable and is disposed in the outer valve body 41. Its outer wall is dynamically sealed to the inner wall of the outer valve body 41 (achieved through a sealing ring groove and a sealing ring). The outer valve core 43 has a first working position for blocking the first side hole 412 and opening the first side hole 412, so that the cavity 1 In the second working position connected to the outside, the outer valve core 43 has an axial through hole 431. The inner valve body 42 is stepped and located within the through hole 431. The outer wall of its large-diameter end is sealed to the inner wall of the through hole 431, and an annular cavity 421 is formed between the outer wall of its small-diameter end and the inner wall of the through hole 431. A second side hole 422 communicating with the annular cavity 421 is provided on the side wall of the inner valve body 42. The inner valve core 44 is axially movable within the inner valve body 42. The inner valve core 44 is dynamically sealed to the inner wall of the inner valve body 42 (achieved through the sealing ring groove and the sealing ring). The inner valve core 44 has a third working position that blocks the second side hole 422 and a fourth working position that opens the second side hole 422, allowing the air hole 12 to communicate with the cavity 11 through the through hole 431, the inner cavity of the inner valve body 42, the second side hole 422, and the annular cavity 421. The inner valve body 42 is provided with an elastic element 45 that drives the inner valve core 44 to move to the third working position that blocks the second side hole 422.

[0021] The advantage of this configuration is that when the vent 12 is open, since the second side hole 422 is blocked, the gas first drives the outer valve core 43 to move to the first working position that blocks the first side hole 412, and then drives the inner valve core 44 to overcome the elastic force of the elastic element 45 to move to the fourth working position that opens the second side hole 422, so that the vent 12 is connected to the cavity 11, thereby driving the piston 20 and piston rod 30 to move and achieve delayed action; when the piston 20 and piston rod 30 are reset, the vent 12 stops opening, and the inner valve core 44 moves to the third working position that blocks the second side hole 422 under the action of the elastic element 45. After that, the gas discharged from the piston 20 and piston rod 30 continues to drive the outer valve core 43 to move to the second working position to open the first side hole 412 to achieve exhaust.

[0022] To facilitate fixing the inner valve body 42, in this embodiment, the through hole 431 is a stepped hole opened at the center of the outer valve core 43, with its large end facing the cavity 11. Furthermore, the end of the large end of the through hole 431 is provided with an inwardly extending annular groove 432, in which a retaining spring 433 is provided to restrict the axial movement of the inner valve body 42.

[0023] To facilitate the guidance of the movement of the inner valve core 44, in this embodiment, the end of the inner valve body 42 facing the cavity 11 is recessed to form an inner retaining ring 423, and the end of the inner valve core 44 facing the cavity 11 is recessed to form a guide post 441. The guide post 441 moves through the inner retaining ring 423. Furthermore, an elastic member 45 is sleeved on the guide post 441, and its two ends respectively abut against the recessed part of the inner retaining ring 423 and the inner valve core 44. The elastic member 45 is preferably a spring.

[0024] To improve intake and exhaust efficiency, in this embodiment, there are four first side holes 412 evenly distributed around the axis of the outer valve body 41, and four second side holes 422 evenly distributed around the axis of the inner valve body 42.

[0025] To facilitate communication, in this embodiment, the inner valve core 44 is provided with an air passage. When the inner valve core 44 is in the fourth working position, the air hole 12 and the through hole 431 are connected to the second side hole 422 through the air passage.

[0026] To expand the scope of application and meet the requirements of drop testers, the cylinder body 10 further includes two parallel longitudinal cylinders 13 and a transverse cylinder 14 connected to one end of the two longitudinal cylinders 13. Each longitudinal cylinder 13 is provided with a piston 20 and a piston rod 30. One end of the piston rod 30 is connected to the piston 20, and the other end extends from the end of the longitudinal cylinder 13 away from the transverse cylinder 14. The end of the longitudinal cylinder 13 away from the transverse cylinder 14 is also provided with a sealing ring 15 and a linear bearing 16. A connection hole 17 for installing a delay valve 40 is opened in the middle of the transverse cylinder 14. To facilitate the connection between the transverse cylinder 14 and the longitudinal cylinder 13, an inner liner tube 18 is further connected at the connection between the two.

[0027] 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 accordingly. 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 included within the protection scope of this utility model.

Claims

1. A time-delay cylinder, comprising a cylinder body, a piston, and a piston rod, wherein the piston divides the inner cavity of the cylinder body into two independent chambers, and the cylinder body has air holes corresponding to and communicating with the chambers, characterized in that: The cylinder body is also provided with a delay valve, which includes a tubular outer valve body, an inner valve body, an outer valve core, and an inner valve core. One end of the outer valve body is connected to one of the cavities, and the other end is provided with a sealing plate. The air hole corresponding to the cavity is opened on the sealing plate. The side wall of the outer valve body is provided with a first side hole connecting the cavity to the outside. The outer valve core is axially movable and is disposed in the outer valve body. Its outer wall is dynamically sealed to the inner wall of the outer valve body. An axial through hole is opened on the outer valve core. The inner valve body is stepped and is disposed in the through hole. Its large diameter end is sealed to the through hole, and its small diameter end forms an annular cavity with the through hole. The side wall of the inner valve body is provided with a second side hole communicating with the annular cavity. The inner valve core is axially movable and is disposed in the inner valve body. Its outer wall is dynamically sealed to the inner wall of the inner valve body. An elastic element is provided in the inner valve body to drive the inner valve core to move and block the second side hole.

2. The time-delay cylinder according to claim 1, characterized in that: The through hole is a stepped hole, with its larger end facing the cavity.

3. The time-delay cylinder according to claim 1, characterized in that: The end of the through hole is provided with an inwardly extending annular groove, in which a retaining spring is provided to restrict the axial movement of the inner valve body.

4. The time-delay cylinder according to claim 1, characterized in that: The through hole is located at the center of the outer valve core.

5. The time-delay cylinder according to claim 1, characterized in that: The inner valve body retracts inward at the end facing the cavity to form an inner retaining ring, and the inner valve core retracts inward at the end facing the cavity to form a guide post, which moves through the inner retaining ring.

6. The time-delay cylinder according to claim 5, characterized in that: The elastic element is sleeved on the guide post, with its two ends respectively abutting against the inner retaining ring and the inner valve core.

7. The time-delay cylinder according to claim 1, characterized in that: The first side hole has multiple holes and is evenly distributed around the axis of the outer valve body.

8. The time-delay cylinder according to claim 1, characterized in that: The second side holes are multiple and evenly distributed around the axis of the inner valve body.

9. The time-delay cylinder according to claim 1, characterized in that: The cylinder body includes two parallel longitudinal cylinders and a transverse cylinder connected to one end of the two longitudinal cylinders. Each longitudinal cylinder is provided with a piston and a piston rod. The transverse cylinder has a connection hole for installing the delay valve in the middle.

10. The time-delay cylinder according to claim 9, characterized in that: An inner liner is connected at the connection between the transverse cylinder and the longitudinal cylinder.

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