Impact-resistant hydraulic pressure switch

Abstract

The utility model relates to the technical field of stamping automation, and discloses an impact-resistant hydraulic pressure switch, which comprises a locknut, one side of the locknut is fixedly connected with a pressure regulating screw rod, one side of the pressure regulating screw rod far away from the locknut is fixedly connected with a cover body, and the inner side of the cover body is fixedly connected with a spring seat. A large spring is fixedly connected to one side of the spring seat, a small spring is fixedly connected to one side of the large spring, an ejector rod is fixedly connected to the inner side of the small spring, and an isolation spring is fixedly connected to one side of the ejector rod. The pressure resistance of the lever-type pressure switch can reach 60MPa, the maximum impact force can reach 30G in the movement process of the press, and compared with a direct-acting pressure switch, under the action of the impact force, the inertia force of parts is converted into the rotating force of the lever, so that the impact is reduced, and the stability of signal transmission of the pressure switch is ensured. And by arranging the double springs, the compression force is more constant, the stroke of the valve element is short, triggering can be achieved through micro flow, and triggering is more sensitive.

Description

Technical Field

[0001] The utility model relates to the technical field of stamping automation, and particularly relates to an impact-resistant hydraulic pressure switch. Background Technique

[0002] In the field of stamping automation, the hydraulic clamping of molds is more and more widely used. With the increase of the press tonnage, the impact during the operation of the press increases accordingly, and the anti-impact ability of the components of the hydraulic system is required to be higher and higher. The impact-resistant pressure switch can ensure the stability of the hydraulic system, thereby ensuring the continuity of production. At present, almost all the pressure switches on the market are direct-acting, and the anti-impact performance of the lever-type pressure switch is greatly improved compared with that of the direct-acting type.

[0003] The application number is 201010167424.9, which discloses a hydraulic control device. The hydraulic control device includes a switchable pressure source, a liquid reservoir, and a pressure switch installed in the discharge path. The pressure switch can connect or block the connection between the valve assembly and the liquid reservoir, and includes a movable control element. The control element is actuated in the first conversion direction by a spring and a pilot pressure derived from the pressure acting on the valve assembly, and is actuated in the second conversion direction to a control position blocking the discharge path by a pilot pressure derived from the supply pressure between the pressure source and the restrictor. The pressure switch is a 2 / 2 multi-way seat valve operating in a leak-free blocking position. The valve member constitutes the control element and cooperates with the valve seat arranged in the discharge path. The pressure source and the valve assembly are permanently connected through a main channel accommodating a restrictor. The discharge path branches out from the main channel between the restrictor and the valve assembly.

[0004] However, there is a deficiency that the pressure source and the valve assembly of the device are permanently connected through a main channel accommodating a restrictor, and the discharge path branches out from the main channel between the restrictor and the valve assembly. However, this device belongs to the direct-acting type and has poor anti-impact performance. Content of the Utility Model

[0005] The purpose of the utility model is to provide an impact-resistant hydraulic pressure switch to solve the problem that the pressure source and the valve assembly of the device are permanently connected through a main channel accommodating a restrictor, and the discharge path branches out from the main channel between the restrictor and the valve assembly. However, this device belongs to the direct-acting type and has poor anti-impact performance as mentioned in the above background technique.

[0006] To solve the above technical problems, the utility model is realized through the following technical solutions:

[0007] The utility model relates to an impact-resistant hydraulic pressure switch, which comprises a locknut. One side of the locknut is fixedly connected with a pressure-regulating screw rod. The side of the pressure-regulating screw rod far away from the locknut is fixedly connected with a cover body. The inner side of the cover body is fixedly connected with a spring seat. One side of the spring seat is fixedly connected with a large spring. One side of the large spring is fixedly connected with a small spring. The inner side of the small spring is fixedly connected with a push rod. One side of the push rod is fixedly connected with an isolation spring. One side of the isolation spring is fixedly connected with a trigger lever.

[0008] Further, an oil inlet is arranged on the inner side of the cover body.

[0009] Further, a steel ball is fixedly connected to one side of the trigger lever. One side of the steel ball is fixedly connected with an O-ring. One side of the O-ring is fixedly connected with a valve core guide sleeve. One side of the valve core guide sleeve is fixedly connected with a valve core combined seal. One side of the valve core combined seal is fixedly connected with a valve seat combined seal.

[0010] Further, a valve core body is fixedly connected to one side of the valve core guide sleeve. The outer side of the valve core body is fixedly connected with a valve seat body.

[0011] Further, a pin shaft is fixedly connected to one side of the steel ball.

[0012] Further, a plug is fixedly connected to one side of the cover body. The inner side of the plug is fixedly connected with a sealing cover.

[0013] Further, a micro switch body is fixedly connected to the inner side of the plug. One side of the micro switch body is fixedly connected with a micro switch mounting plate.

[0014] Further, a wiring cap is fixedly connected to one side of the plug. One side of the wiring cap is fixedly connected with a switch body.

[0015] The utility model has the following beneficial effects:

[0016] (1) The lever-type pressure switch adopted by the utility model can withstand a pressure of up to 60 MPa, and the maximum impact force during the movement of the press can reach 30 G. Compared with the direct-acting pressure switch, under the action of the impact force, the inertial force of the components is converted into the lever rotation force to reduce the impact, ensuring the stability of the pressure switch signal transmission. And by setting a double spring, it is ensured that the compression force is more constant, the valve core stroke is short, and a small flow rate can trigger it, making the trigger more sensitive.

[0017] Of course, it is not necessary for any product implementing the utility model to achieve all the above-mentioned advantages simultaneously. Description of the Drawings

[0018] To more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the attached drawings required for the description of the embodiments. Obviously, the attached drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other attached drawings can be obtained based on these drawings.

[0019] Figure 1 Schematic diagram of the overall structure of the present utility model;

[0020] Figure 2 Top view of the overall structure of the present utility model;

[0021] Figure 3 Side view of the overall structure of the present utility model;

[0022] In the attached drawings, the list of components represented by each reference numeral is as follows:

[0023] In the figure: 1, locknut; 2, pressure regulating screw; 3, cover body; 4, spring seat; 5, large spring; 6, small spring; 7, ejector rod; 8, isolation spring; 9, trigger lever; 10, oil inlet; 11, steel ball; 12, O-ring; 13, spool guide sleeve; 14, spool combined seal; 15, valve seat combined seal; 16, spool body; 17, valve seat body; 18, pin shaft; 19, plug; 20, sealing cover; 21, microswitch body; 22, microswitch mounting plate; 23, terminal cap; 24, switch body; Specific embodiments

[0024] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the attached drawings in the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, rather than all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present utility model.

[0025] Please refer to Figures 1-3 As shown, the present utility model is an impact-resistant hydraulic pressure switch, including a locknut 1. One side of the locknut 1 is fixedly connected to a pressure regulating screw 2. The side of the pressure regulating screw 2 away from the locknut 1 is fixedly connected to a cover body 3. The inner side of the cover body 3 is fixedly connected to a spring seat 4. One side of the spring seat 4 is fixedly connected to a large spring 5. One side of the large spring 5 is fixedly connected to a small spring 6. The inner side of the small spring 6 is fixedly connected to an ejector rod 7. One side of the ejector rod 7 is fixedly connected to an isolation spring 8. One side of the isolation spring 8 is fixedly connected to a trigger lever 9.

[0026] The locknut 1 is used to lock the pressure regulating screw 2 and ensure that the position of the pressure regulating screw 2 remains unchanged; the pressure regulating screw 2 is an external thread screw, which plays a role in adjusting the spring compression amount. After the position is fixed, the spring compression stroke is fixed, and the spring force remains unchanged, so as to ensure that the microswitch sends a signal when the oil pressure is fixed at a certain value. The surface of the cover is machined with fine thread, which is matched with the external thread of the screw to ensure the movement of the pressure regulating screw 2 in the axial direction, accurately adjust the position, and ensure the locking of the screw after being matched with the nut.

[0027] By adopting the above technical solution, in this solution, an oil inlet 10 is provided on the inner side of the cover body 3.

[0028] By adopting the above technical solution, in this solution, a steel ball 11 is fixedly connected to one side of the trigger lever 9, an O-ring 12 is fixedly connected to one side of the steel ball 11, a valve core guide sleeve 13 is fixedly connected to one side of the O-ring 12, a valve core combined seal 14 is fixedly connected to one side of the valve core guide sleeve 13, and a valve seat combined seal 15 is fixedly connected to one side of the valve core combined seal 14.

[0029] The steel ball 11 ensures that the force between the valve core body 16 and the ejector rod 7 is along the axial direction, preventing inclination.

[0030] By adopting the above technical solution, in this solution, a valve core body 16 is fixedly connected to one side of the valve core guide sleeve 13, and a valve seat body 17 is fixedly connected to the outside of the valve core body 16.

[0031] The valve core guide sleeve 13 ensures the axial movement of the valve core body 16, prevents inclination, and fixes the valve core combined seal 14.

[0032] By adopting the above technical solution, in this solution, a pin shaft 18 is fixedly connected to one side of the steel ball 11.

[0033] The pin shaft 18 is used for the rotating shaft of the trigger lever 9.

[0034] By adopting the above technical solution, in this solution, a plug 19 is fixedly connected to one side of the cover body 3, and a sealing cover 20 is fixedly connected to the inside of the plug 19.

[0035] By adopting the above technical solution, in this solution, a microswitch body 21 is fixedly connected to the inside of the plug 19, and a microswitch mounting plate 22 is fixedly connected to one side of the microswitch body 21.

[0036] By adopting the above technical solution, in this solution, a terminal cap 23 is fixedly connected to one side of the plug 19, and a switch body 24 is fixedly connected to one side of the terminal cap 23.

[0037] When in use, the lever-type pressure switch adopted by this device can withstand a pressure of up to 60 MPa, and the maximum impact force during the movement of the press can reach 30 G. Compared with the direct-acting pressure switch, under the action of the impact force, the inertial force of the components is converted into the rotational force of the lever to reduce the impact and ensure the stability of the pressure switch signal transmission. And by setting a double spring, the compression force is ensured to be more constant, the spool stroke is short, and a small flow rate can trigger it, making the trigger more sensitive.

[0038] The preferred embodiments of the present utility model disclosed above are only used to help explain the present utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the present utility model to the specific embodiments described. Obviously, many modifications and changes can be made according to the content of this specification. These embodiments are selected and specifically described in this specification to better explain the principle and practical application of the present utility model, so that those skilled in the art can well understand and utilize the present utility model. The present utility model is only limited by the claims and their full scope and equivalents.

Claims

1. An impact-resistant hydraulic pressure switch, comprising a locking nut (1), characterized in that: A pressure regulating screw (2) is fixedly connected to one side of the anti-loosening nut (1); a cover body (3) is fixedly connected to the inner side of the cover body (3); a large spring (5) is fixedly connected to one side of the spring seat (4); a small spring (6) is fixedly connected to one side of the large spring (5); a push rod (7) is fixedly connected to the inner side of the small spring (6); an isolation spring (8) is fixedly connected to one side of the push rod (7); and a trigger lever (9) is fixedly connected to one side of the isolation spring (8).

2. The impact-resistant hydraulic pressure switch according to claim 1, characterized in that: An oil inlet (10) is provided on the inner side of the cover body (3).

3. The impact-resistant hydraulic pressure switch according to claim 1, characterized in that: A steel ball (11) is fixedly connected to one side of the trigger lever (9), an O-ring (12) is fixedly connected to one side of the steel ball (11), a valve core guide sleeve (13) is fixedly connected to one side of the O-ring (12), a valve core guide sleeve (13) is fixedly connected to one side of the valve core assembly seal (14), and a valve seat assembly seal (15) is fixedly connected to one side of the valve core assembly seal (14).

4. The impact-resistant hydraulic pressure switch according to claim 3, characterized in that: A valve core body (16) is fixedly connected to one side of the valve core guide sleeve (13), and a valve seat body (17) is fixedly connected to the outer side of the valve core body (16).

5. The impact-resistant hydraulic pressure switch according to claim 3, characterized in that: A pin shaft (18) is fixedly connected to one side of the steel ball (11).

6. The impact-resistant hydraulic pressure switch according to claim 2, characterized in that: A plug (19) is fixedly connected to one side of the cover body (3), and a sealing cover (20) is fixedly connected to the inner side of the plug (19).

7. The impact-resistant hydraulic pressure switch according to claim 6, characterized in that: A micro switch body (21) is fixedly connected to the inner side of the plug (19), and a micro switch mounting plate (22) is fixedly connected to one side of the micro switch body (21).

8. The impact-resistant hydraulic pressure switch according to claim 7, characterized in that: A wiring cap (23) is fixedly connected to one side of the plug (19), and a switch body (24) is fixedly connected to one side of the wiring cap (23).

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