A shear arm mechanism hydraulic mechanical lock mechanism and a locking method thereof

Abstract

A kind of shearing arm mechanism hydraulic mechanical lock mechanism and its locking method, including limiting rack (11), limiting rack (12), sliding connection beam (14), linear guide pair (18) and locking cylinder (19), the guide rail of linear guide pair (18) is installed at limiting rack (12) both sides, the sliding connection beam (14) is connected with limiting rack by the slider of linear guide pair (18), the locking cylinder (19) is installed on sliding connection beam (14), the limiting rack (12) is connected at the bottom of sliding connection beam (14), the piston rod of locking cylinder (19) is connected with limiting rack (12).The present application provides a kind of shearing arm mechanism hydraulic mechanical lock mechanism, its structure is simple, and manufacturing cost is low;In the oil circuit system of using hydraulic cylinder lifting, lock machine cylinder is connected with its explosion-proof valve, when lifting cylinder explodes or oil circuit pressure relief, locking cylinder can quickly lock lifting mechanism to prevent lifting mechanism from falling quickly, ensure safety.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of hydraulic equipment, in particular to a shearing arm mechanism hydraulic mechanical lock mechanism and a locking method thereof. BACKGROUND

[0002] Hydraulic oil cylinders are widely used, and at present, for the equipment relying on the lifting of the hydraulic cylinder, due to the accidental conditions such as oil line pressure relief and cylinder explosion, the equipment is prone to sudden drop, which causes safety problems. In many use occasions, the oil cylinder is usually required to have a locking function at the end of the stroke to prevent the piston rod from moving under the action of a large external force and affecting the supporting effect of the oil cylinder. At present, the commonly used method for locking the oil cylinder is to use a hydraulic lock for locking, but due to the large size of the hydraulic lock, it is difficult to install and maintain in use occasions with limited installation space. There is also a way of locking by machining threads on the piston rod and locking with a nut, which causes the piston rod to be relatively long. If a large external force is encountered, the piston rod will still move and affect the locking effect. SUMMARY

[0003] The present application provides a shearing arm mechanism hydraulic mechanical lock mechanism and a locking method thereof, which solves the technical problems of the size of the locking mechanism of the prior art hydraulic oil cylinder being large, the use cost being high, the locking effect being poor, the existence of accidental conditions such as oil line pressure relief and cylinder explosion, and the equipment being prone to sudden drop.

[0004] To solve the above problems, the technical scheme adopted by the present application is as follows:

[0005] A shearing arm mechanism hydraulic mechanical lock mechanism, comprising a limiting rack, a limiting rack seat, a sliding connection beam, a linear guide rail pair and a locking oil cylinder, the guide rails of the linear guide rail pair are installed on both sides of the limiting rack, the sliding connection beam is movably connected with the limiting rack through the sliding blocks of the linear guide rail pair, the locking oil cylinder is installed on the sliding connection beam, the limiting rack seat is connected to the bottom of the sliding connection beam, and the piston rod of the locking oil cylinder is connected with the limiting rack seat.

[0006] Specifically, a through hole is arranged at the center of the sliding connection beam, the two ends of the sliding connection beam are connected with the sliding blocks of the linear guide rail pair through bolts, the two ends of the sliding connection beam are further provided with hinged shaft holes, an oil cylinder support is installed on the upper part of the sliding connection beam, and the locking oil cylinder is fixed on the oil cylinder support.

[0007] Specifically, the upper part of the limiting rack seat is a hollow circular truncated cone and is provided with an internal thread, the hollow circular truncated cone is arranged in the through hole of the sliding connection beam, and the lower part of the limiting rack seat is provided with a rack which can engage with the limiting rack.

[0008] Specifically, the limiting rack seat and the sliding connection beam are further connected through a spring, and the spring is arranged on both sides of the limiting rack seat.

[0009] Specifically, the oil cylinder support is in the shape of "U", and is installed on the sliding connection beam in the form of reverse buckle, the bottom of the locking oil cylinder is attached to the upper part of the oil cylinder support, and the piston rod of the locking oil cylinder is located below the oil cylinder support.

[0010] Specifically, the lower part of the piston rod of the locking oil cylinder is provided with external threads, and the adjusting nut is screwed.

[0011] Specifically, the middle part of the adjusting nut is provided with a boss, the lower part of the adjusting nut below the boss is provided with external threads, and the locking nut is screwed, and the lower part of the adjusting nut is connected to the hollow circular table of the upper part of the limiting tooth seat in the form of threaded cooperation.

[0012] Specifically, the hinge shaft holes at both ends of the sliding connection beam are connected to one end of the shear arm group through hinge shafts.

[0013] A locking method of a shear arm mechanism hydraulic mechanical lock mechanism, comprising the following steps:

[0014] S1, the motor is started, the oil pump supplies oil, when the pressure reaches a certain value, the balance valve is opened, and the pressure on the right side of the explosion-proof valve is greater than that on the left side of the explosion-proof valve;

[0015] S2, the hydraulic oil enters the rod cavity of the locking oil cylinder through the right side of the explosion-proof valve, the piston rod of the locking oil cylinder drives the limiting tooth seat to move upward against the elastic force of the spring, and the limiting tooth seat is separated from the limiting rack;

[0016] S3, the rodless cavity of the main oil cylinder is filled with oil, the piston rod of the main oil cylinder drives the shear arm group to move upward, and the movable parts of the hydraulic mechanical lock mechanism slide along the guide rail of the linear guide rail pair together with the shear arm group;

[0017] S4, if an emergency occurs (the main oil cylinder explodes or the oil circuit is depressurized), the pressure on the left side of the explosion-proof valve is greater than that on the right side of the explosion-proof valve, the locking oil cylinder returns oil, the elastic force of the spring accelerates the downward movement of the piston rod of the locking oil cylinder, the limiting tooth seat is engaged with the limiting rack, and the position is locked.

[0018] Based on the above technical scheme, the following technical effects can be achieved:

[0019] The present application provides a shear arm mechanism hydraulic mechanical lock mechanism, which has simple structure and low manufacturing cost; in the oil circuit system of the lifting hydraulic oil cylinder, the lock cylinder is connected with the explosion-proof valve thereof, when the lifting oil cylinder explodes or the oil circuit is depressurized, the locking oil cylinder can quickly lock the lifting mechanism to prevent the rapid falling of the lifting mechanism, and safety is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 The hydraulic mechanical lock mechanism is shown in the axonometric view;

[0021] Figure 2 The hydraulic mechanical lock mechanism is shown in the top view;

[0022] Figure 3 A-A section view of hydraulic mechanical lock mechanism;

[0023] Figure 4 Axonometric view of shear arm mechanism;

[0024] Figure 5 Hydraulic principle diagram of hydraulic mechanical lock mechanism.

[0025] In the figure: 1-hydraulic mechanical lock structure, 2-shear arm group, 3-main oil cylinder, 4-bottom end fixed shaft, 5-oil cylinder head push pin, 6-explosion-proof oil cylinder, 11-limiting rack, 12-limiting rack seat, 13-spring, 14-sliding connection beam, 15-adjusting nut, 16-oil cylinder support, 17-locking nut, 18-linear guide rail pair, 19-locking oil cylinder. DETAILED DESCRIPTION

[0026] It should be understood that the specific embodiments described herein are merely exemplary and not intended to limit the present application.

[0027] In the description of the present application, it should be understood that, in relation to the orientation description, for example, the orientation or position relationship indicated by the upper, lower, front, rear, left, right and the like is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0028] In the description of the present application, unless otherwise explicitly limited, the words such as setting, installing, connecting and the like should be understood in a broad sense, and the person skilled in the art can reasonably determine the specific meaning of the above words in the present application in combination with the specific content of the technical solution.

[0029] The technical solutions in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by the person skilled in the art without creative labor are within the scope of protection of the present application.

[0030] As Figures 1-5As shown, a kind of shear arm mechanism hydraulic mechanical lock mechanism, including limiting rack 11, limiting rack seat 12, sliding connection beam 14, linear guide pair 18 and lock cylinder 19, the guide rail of the linear guide pair 18 is installed on the both sides of limiting rack 12, the sliding connection beam 14 is connected with limiting rack by the slider of linear guide pair 18, the lock cylinder 19 is installed on sliding connection beam 14, the limiting rack seat 12 is connected at the bottom of sliding connection beam 14, and the piston rod of the lock cylinder 19 is connected with limiting rack seat 12.

[0031] The center of the sliding connection beam 14 is provided with a through hole, the both ends of the sliding connection beam 14 are connected with the slider of the linear guide pair 18 by bolts, the both ends of the sliding connection beam 14 are further provided with hinged shaft holes, the upper part of the sliding connection beam 14 is provided with a cylinder support 16, and the lock cylinder 19 is fixed on the cylinder support 16.

[0032] The upper part of the limiting rack seat 12 is a hollow circular table and is provided with an internal thread, the hollow circular table is arranged in the through hole of the sliding connection beam 14, and the lower part of the limiting rack seat 12 is provided with a rack capable of engaging with the limiting rack 11.

[0033] The limiting rack seat 12 and the sliding connection beam 14 are further connected by a spring 13, and the spring is arranged on the both sides of the limiting rack seat 12.

[0034] The cylinder support 16 is in the shape of "U" and is installed on the sliding connection beam 14 in the form of reverse buckling, the bottom of the lock cylinder 19 is attached to the upper part of the cylinder support 16, and the piston rod of the lock cylinder 19 is located below the cylinder support 16.

[0035] The lower part of the piston rod of the lock cylinder 19 is provided with an external thread, and an adjusting nut 15 is screwed.

[0036] The middle part of the adjusting nut 15 is provided with a boss, the lower part of the adjusting nut 15 is provided with an external thread below the boss, a locking nut 17 is screwed, and the lower part of the adjusting nut 15 is connected with the hollow circular table of the upper part of the limiting rack seat 12 in the form of threaded cooperation.

[0037] The hinged shaft holes at the both ends of the sliding connection beam 14 are connected with one end of the shear arm group 2 through a hinged shaft.

[0038] A locking method of a shear arm mechanism hydraulic mechanical lock mechanism includes the following steps:

[0039] S1, the motor is started, the oil pump supplies oil, when the pressure reaches a certain value, the balance valve is opened, and the pressure on the right side of the explosion-proof valve 6 is greater than the pressure on the left side of the explosion-proof valve 6;

[0040] S2, hydraulic oil enters the rod cavity of the locking cylinder 19 through the right side of the explosion-proof valve 6, the locking cylinder 19 piston rod drives the limiting tooth seat 12 to overcome the elastic force of the spring 13 and move upward, the limiting tooth seat 12 is separated from the limiting rack 11;

[0041] S3, the rodless cavity of the main cylinder 3 enters oil, the main cylinder 3 piston rod drives the shear arm group 2 to move upward, the movable parts of the hydraulic mechanical lock mechanism 1 slide along the guide rail of the linear guide pair 18 together with the shear arm group 2;

[0042] S4, if the main cylinder 3 explodes or the oil circuit is depressurized, the pressure on the left side of the explosion-proof valve 6 is greater than that on the right side of the explosion-proof valve 6, the rod cavity of the locking cylinder 19 returns oil, the elastic force of the spring 13 accelerates the downward movement of the locking cylinder 19 piston rod, the limiting tooth seat 12 meshes with the limiting rack 11, and the position is locked.

[0043] In the embodiment, as shown in Figure 4 , the hydraulic mechanical lock mechanism 1 is hinged to one end of the shear arm group 2 through the bottom end fixed shaft 4, the other end of the shear arm group 2 is hinged to the rack, the main cylinder 3 piston rod is hinged to the shear arm group 2 through the cylinder push head 5, and the cylinder bottom of the main cylinder 3 is hinged to the rack.

[0044] The locking cylinder 19 is connected into the shear arm mechanism lifting hydraulic oil circuit system, wherein the locking cylinder 19 is connected with the explosion-proof valve 6, as shown in Figure 5 .

[0045] The working principle of the shear arm mechanism hydraulic mechanical lock mechanism of the present application is as follows:

[0046] The motor is started, the oil pump supplies oil, when the pressure reaches a certain value, the balance valve is opened, the pressure on the right side of the explosion-proof valve 6 is greater than that on the left side of the explosion-proof valve 6, the hydraulic oil enters the rod cavity of the locking cylinder 19 through the right side of the explosion-proof valve 6, the locking cylinder 19 piston rod drives the limiting tooth seat 12 to overcome the elastic force of the spring 13 and move upward, the limiting tooth seat 12 is separated from the limiting rack 11; at the same time, the rodless cavity of the main cylinder 3 enters oil, the main cylinder 3 piston rod drives the shear arm group 2 to move upward, the movable parts of the hydraulic mechanical lock mechanism 1 slide along the guide rail of the linear guide pair 18 together with the shear arm group 2. When the main cylinder 3 explodes or the oil circuit is depressurized, the pressure on the left side of the explosion-proof valve 6 is greater than that on the right side of the explosion-proof valve 6, the rod cavity of the locking cylinder 19 returns oil, the elastic force of the spring 13 accelerates the downward movement of the locking cylinder 19 piston rod, the limiting tooth seat 12 meshes with the limiting rack 11, and the position is locked, preventing the shear arm mechanism from falling rapidly and ensuring safety.

[0047] The application has been described in detail with reference to the drawings and embodiments, but the application is not limited to the above-mentioned embodiments, and various changes can be made within the scope of ordinary skill in the art without departing from the purpose of the application. Therefore, the application is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of the present application are within the scope of the application.

Claims

1. A shear arm mechanism hydraulic mechanical lock mechanism, characterized by, It comprises a limiting rack (11), a limiting rack seat (12), a sliding connection beam (14), a linear guide pair (18) and a locking oil cylinder (19), the guide rail of the linear guide pair (18) is installed on both sides of the limiting rack (11), the sliding connection beam (14) is movably connected with the limiting rack through the slider of the linear guide pair (18), the locking oil cylinder (19) is installed on the sliding connection beam (14), the limiting rack seat (12) is connected at the bottom of the sliding connection beam (14), and the piston rod of the locking oil cylinder (19) is connected with the limiting rack seat (12); The center of the sliding connection beam (14) is provided with a through hole, the two ends of the sliding connection beam (14) are connected with the sliders of the linear guide pair (18) through bolts, the two ends of the sliding connection beam (14) are further provided with hinged shaft holes, the upper part of the sliding connection beam (14) is provided with an oil cylinder support (16), and the locking oil cylinder (19) is fixed on the oil cylinder support (16); The upper part of the limiting rack seat (12) is a hollow circular table and is provided with an internal thread, the hollow circular table is arranged in the through hole of the sliding connection beam (14), and the lower part of the limiting rack seat (12) is provided with a rack which can be engaged with the limiting rack (11); The limiting rack seat (12) and the sliding connection beam (14) are further connected through a spring (13), and the spring is arranged on both sides of the limiting rack seat (12).

2. A hydraulic shear arm mechanism lock mechanism according to claim 1, wherein The oil cylinder support (16) is "U"-shaped and is installed on the sliding connection beam (14) in the form of reverse buckling, the bottom of the locking oil cylinder (19) is attached to the upper part of the oil cylinder support (16), and the piston rod of the locking oil cylinder (19) is located below the oil cylinder support (16).

3. The hydraulic shear arm mechanism lock mechanism of claim 1, wherein, The lower part of the piston rod of the locking oil cylinder (19) is provided with an external thread, and an adjusting nut (15) is screwed.

4. The hydraulic shear arm mechanism lock mechanism of claim 3, wherein, The middle part of the adjusting nut (15) is provided with a boss, the lower part of the adjusting nut (15) is provided with an external thread and is screwed with a locking nut (17), and the lower part of the adjusting nut (15) is connected with the hollow circular table of the upper part of the limiting rack seat (12) in the form of threaded cooperation.

5. The hydraulic shear arm mechanism lock mechanism of claim 1, wherein, The hinged shaft holes at the two ends of the sliding connection beam (14) are connected with one end of the shear arm group (2) through a hinged shaft.

6. A locking method of a shear arm mechanism hydraulic mechanical lock mechanism, based on any one of claims 1-5, characterized in that, It comprises the following steps: S1, the motor is started, the oil pump supplies oil, when the pressure reaches a certain value, the balance valve is opened, and the pressure on the right side of the explosion-proof valve (6) is greater than that on the left side of the explosion-proof valve (6); S2, the hydraulic oil enters the rod cavity of the locking oil cylinder (19) through the right side of the explosion-proof valve (6), the piston rod of the locking oil cylinder (19) drives the limiting rack seat (12) to move upward against the elastic force of the spring (13), and the limiting rack seat (12) is separated from the limiting rack (11); S3, the rodless cavity of the main oil cylinder (3) is filled with oil, the piston rod of the main oil cylinder (3) drives the shear arm group (2) to move upward, and the movable part of the hydraulic mechanical lock mechanism (1) slides along the guide rail of the linear guide pair (18) together with the shear arm group (2). S4, if an emergency occurs, the left side pressure of the explosion-proof valve (6) is greater than the right side pressure of the explosion-proof valve (6), the locking oil cylinder (19) has a rod oil return, the spring (13) accelerates the downward movement of the piston rod of the locking oil cylinder (19), the limiting tooth seat (12) is engaged with the limiting rack (11), and the position is locked.

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