A servomotor with a lock pin structure

Abstract

The utility model relates to oil cylinder technical field especially relates to a kind of servomotor with lock pin structure, including main oil cylinder and the lock pin device being set to its output end. Annular groove lock structure is equipped on the first piston rod of main oil cylinder. Lock pin device includes the lock pin ring seat fixed in the end of main oil cylinder and the lock cylinder vertically arranged with it. The second piston rod of lock cylinder can be vertically moved under the hydraulic drive, and the annular groove of first piston rod is inserted or withdrawn, realizes mechanical locking and release. The lock structure and piston rod are integrally designed in the application, and the mode of single hydraulic cylinder drives lock pin pin is used, replaces the traditional complex lock pin brake board and support mechanism, with compact structure, low manufacturing cost, easy and fast operation, high safety reliability and other advantages, effectively solve the problem that the existing lock pin device structure is complex, occupies large space, inconvenient operation, especially applicable to the occasion needing high safety maintenance, such as water turbine guide vane control, effectively guarantee the safety of maintenance personnel and equipment.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic cylinder technology, and in particular to a relay device with a locking structure. Background Technology

[0002] In hydraulic control systems, cylinders and actuators are key components widely used in mechanical transmission and control. They typically achieve displacement or angle adjustment of the mechanical structure by alternately injecting hydraulic oil into the two chambers of the cylinder to drive the piston's reciprocating motion. These devices are commonly used in fields such as turbine guide vane control, gate opening and closing, and heavy industrial equipment. Their reliability and safety directly affect the stability of the entire system.

[0003] In certain special operating conditions, such as equipment maintenance, system debugging, or emergency shutdown, it is necessary to ensure that the output shaft of the hydraulic cylinder remains fixed to prevent accidental piston movement due to misoperation or residual pressure in the hydraulic system, which could cause equipment damage or personal injury. Therefore, traditional designs often incorporate a locking device to mechanically lock the piston rod.

[0004] Currently, common lock structures typically include complex mechanical components such as lock gates, lock supports, and pin mechanisms. These components are not only structurally cumbersome but also occupy a large amount of space, resulting in high manufacturing costs and difficulties in installation and maintenance.

[0005] The information disclosed in this background section is intended only to enhance the understanding of the general background of this disclosure and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content

[0006] The purpose of this invention is to provide a relay device with a locking structure to address the deficiencies in the existing technology.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A relay with a locking structure includes a main cylinder and a locking device disposed at its output end, wherein a locking structure is provided on the first piston rod of the main cylinder corresponding to the locking device; The main cylinder includes a first cylinder body and a front cylinder head and a rear cylinder head disposed at both ends thereon. A first piston is disposed in a first cavity formed by the first cylinder body and the front cylinder head and the rear cylinder head. One end of the first piston rod is connected to the first piston, and the other end passes through the front cylinder head. The locking structure is located outside the first cavity. The locking device includes a locking ring seat and a locking cylinder disposed thereon. The locking ring seat is disposed at the end of the first cylinder body and is located on the outer ring of the first piston rod.

[0008] Furthermore, the locking cylinder includes a second cylinder body and an upper cylinder cover and a lower cylinder cover disposed at both ends thereon, and a second piston and a second piston rod are disposed in a second cavity formed by the second cylinder body in conjunction with the upper cylinder cover and the lower cylinder cover; The second piston rod is arranged perpendicularly to the first piston rod, the second piston is sleeved on the second piston rod, and one end of the second piston rod passes through the lower cylinder head and extends into the locking ring seat.

[0009] Furthermore, the first piston rod passes through the first through hole of the locking ring seat, and the second piston rod extends into the second through hole of the locking ring seat. The first through hole and the second through hole are perpendicular to each other and communicate with each other.

[0010] Furthermore, the locking structure includes an annular groove formed circumferentially along the first piston rod, the cross-section of which is arc-shaped corresponding to the second piston rod.

[0011] Furthermore, the first piston divides the first cavity into a left cavity and a right cavity, and a first oil port and a second oil port are provided on the first cylinder body, which are respectively connected to the left cavity and the right cavity.

[0012] Furthermore, the second piston divides the second cavity into an upper cavity and a lower cavity, and a third oil port and a fourth oil port are provided on the second cylinder body, the third oil port and the fourth oil port being connected to the upper cavity and the lower cavity respectively.

[0013] The beneficial effects of this utility model are as follows: The locking device disclosed in this application has a simple and compact structure, eliminating the need for complex components such as traditional locking gates and supports, which significantly reduces manufacturing costs and installation space requirements. At the same time, it is easy and quick to operate, and has a reliable response, greatly improving the safety and maintenance convenience of the equipment. Even if a hydraulic system malfunction occurs during maintenance, the locking device can provide reliable mechanical locking, absolutely ensuring the safety of personnel and equipment. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the relay device with a locking structure in this utility model; Figure 2This is a cross-sectional schematic diagram of the main hydraulic cylinder in this utility model; Figure 3 This is a cross-sectional schematic diagram of the locking device in this utility model.

[0016] Reference numerals: 1. Main cylinder; 11. First piston rod; 12. Locking structure; 121. Ring groove; 13. First cylinder body; 131. First oil port; 132. Second oil port; 14. Front cylinder head; 15. Rear cylinder head; 16. First cavity; 161. Left cavity; 162. Right cavity; 17. First piston; 2. Locking device; 3. Locking ring seat; 31. First through hole; 32. Second through hole; 4. Locking cylinder; 41. Second cylinder body; 411. Third oil port; 412. Fourth oil port; 42. Upper cylinder head; 43. Lower cylinder head; 44. Second cavity; 441. Upper cavity; 442. Lower cavity; 45. Second piston; 46. Second piston rod. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0018] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0019] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0020] like Figures 1 to 3The relay with a locking structure shown includes a main cylinder 1 and a locking device 2 disposed at its output end. A locking structure 12 is provided on the first piston rod 11 of the main cylinder 1 corresponding to the locking device 2. The main cylinder 1 includes a first cylinder body 13 and a front cylinder cover 14 and a rear cylinder cover 15 disposed at its two ends. A first piston 17 is disposed in a first cavity 16 formed by the first cylinder body 13 and the front cylinder cover 14 and the rear cylinder cover 15. One end of the first piston rod 11 is connected to the first piston 17, and the other end passes through the front cylinder cover 14. The locking structure 12 is located outside the first cavity 16. The locking device 2 includes a locking ring seat 3 and a locking cylinder 4 disposed thereon. The locking ring seat 3 is disposed at the end of the first cylinder body 13 and is located on the outer ring of the first piston rod 11.

[0021] The locking cylinder 4 includes a second cylinder body 41 and an upper cylinder cover 42 and a lower cylinder cover 43 disposed at both ends thereon. A second piston 45 and a second piston rod 46 are disposed in a second cavity 44 formed by the second cylinder body 41 and the upper cylinder cover 42 and the lower cylinder cover 43. The second piston rod 46 is arranged perpendicularly to the first piston rod 11. The second piston is sleeved on the second piston rod 46. One end of the second piston rod 46 passes through the lower cylinder cover 43 and extends into the locking ring seat 3.

[0022] The locking structure 12 is located on the section of the first piston rod 11 outside the first cavity 16, and is used to cooperate with the locking device 2 to achieve mechanical locking. When it is necessary to lock the relay, the main cylinder 1 is first controlled to retract the first piston rod 11 to a predetermined position. Oil is then supplied to the locking cylinder 4 through the hydraulic control circuit to push the second piston rod 46 downward, so that it engages with the locking structure 12 on the first piston rod 11. At this time, even if pressure oil is accidentally supplied to the main cylinder 1, the first piston rod 11 cannot extend, thus ensuring the safety of maintenance operations.

[0023] The locking device 2 disclosed in this application has a simple and compact structure, eliminating the need for complex components such as traditional locking gates and supports, which significantly reduces manufacturing costs and installation space requirements. At the same time, it is easy and quick to operate, has a reliable response, and greatly improves the safety and maintenance convenience of the equipment.

[0024] Specifically, the first piston rod 11 passes through the first through hole 31 of the locking ring seat 3, and the second piston rod 46 extends into the second through hole 32 of the locking ring seat 3. The first through hole 31 and the second through hole 32 are perpendicularly arranged and communicate with each other. The second piston rod 46 is arranged perpendicularly to the first piston rod 11. When the first piston rod 11 retracts to a predetermined position, its upper annular groove 121 aligns with the second through hole 32, so that the second piston rod 46 can reliably insert into the locking structure 12 on the first piston rod 11 when it moves downward.

[0025] The locking structure 12 includes an annular groove 121 circumferentially formed along the first piston rod 11, and the cross-section of the annular groove 121 is arc-shaped corresponding to the second piston rod 46. This allows the second piston rod 46 to smoothly insert into the annular groove 121 and achieve large-area contact, effectively dispersing the locking force, reducing stress concentration, and improving the reliability of the locking mechanism and the lifespan of the components.

[0026] The first piston 17 divides the first chamber 16 into a left chamber 161 and a right chamber 162. A first oil port 131 and a second oil port 132 are provided on the first cylinder body 13, respectively connecting the left chamber 161 and the right chamber 162. By alternately introducing pressurized oil into these two ports, the first piston 17 and the first piston rod 11 can be driven to perform reciprocating motion.

[0027] The second piston 45 divides the second cavity 44 into an upper cavity 441 and a lower cavity 442. A third oil port 411 and a fourth oil port 412 are provided on the second cylinder 41, respectively connecting the upper cavity 441 and the lower cavity 442. By introducing pressurized oil into the third oil port 411 while oil returns from the fourth oil port 412, the second piston 45 and the second piston rod 46 can be driven to move downwards, performing the locking action. Conversely, by introducing pressurized oil into the fourth oil port 412 while oil returns from the third oil port 411, the second piston rod 46 is driven to move upwards out of the annular groove 121, releasing the locking action.

[0028] Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A relay device with a locking structure, characterized in that, It includes a main oil cylinder (1) and a locking device (2) disposed at its output end. A locking structure (12) is provided on the first piston rod (11) of the main oil cylinder (1) corresponding to the locking device (2). The main cylinder (1) includes a first cylinder body (13) and a front cylinder head (14) and a rear cylinder head (15) disposed at both ends thereon. A first piston (17) is disposed in a first cavity (16) formed by the first cylinder body (13) in conjunction with the front cylinder head (14) and the rear cylinder head (15). One end of the first piston rod (11) is connected to the first piston (17), and the other end passes through the front cylinder head (14). The locking structure (12) is located outside the first cavity (16). The locking device (2) includes a locking ring seat (3) and a locking cylinder (4) disposed thereon. The locking ring seat (3) is disposed at the end of the first cylinder body (13) and is located on the outer ring of the first piston rod (11).

2. The relay device with a locking structure according to claim 1, characterized in that, The locking cylinder (4) includes a second cylinder body (41) and an upper cylinder cover (42) and a lower cylinder cover (43) disposed at both ends thereon. A second piston (45) and a second piston rod (46) are disposed in a second cavity (44) formed by the second cylinder body (41) in conjunction with the upper cylinder cover (42) and the lower cylinder cover (43). The second piston rod (46) is arranged perpendicularly to the first piston rod (11), the second piston (45) is sleeved on the second piston rod (46), and one end of the second piston rod (46) passes through the lower cylinder head (43) and extends into the locking ring seat (3).

3. The relay device with a locking structure according to claim 2, characterized in that, The first piston rod (11) passes through the first through hole (31) of the locking ring seat (3), and the second piston rod (46) extends into the second through hole (32) of the locking ring seat (3). The first through hole (31) and the second through hole (32) are perpendicular to each other and communicate with each other.

4. The relay device with a locking structure according to claim 2, characterized in that, The locking structure (12) includes an annular groove (121) circumferentially formed along the first piston rod (11), and the cross section of the annular groove (121) is set to be arc-shaped corresponding to the second piston rod (46).

5. The relay device with a locking structure according to claim 1, characterized in that, The first piston (17) divides the first cavity (16) into a left cavity (161) and a right cavity (162). A first oil port (131) and a second oil port (132) are provided on the first cylinder (13). The first oil port (131) and the second oil port (132) are respectively connected to the left cavity (161) and the right cavity (162).

6. The relay device with a locking structure according to claim 2, characterized in that, The second piston (45) divides the second cavity (44) into an upper cavity (441) and a lower cavity (442). A third oil port (411) and a fourth oil port (412) are provided on the second cylinder (41), and the third oil port (411) and the fourth oil port (412) are respectively connected to the upper cavity (441) and the lower cavity (442).

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