阅读说明：本技术 一种带载回退液压回路 (On-load backspacing hydraulic circuit ) 是由 郑宏伟 黄涛 卢博 郭亚明 关若旸 赵翔宇 李亦楠 徐恒秋 孙利忠 于 2019-10-31 设计创作，主要内容包括：本发明提出一种带载回退液压回路,属于液压装置。一种带载回退液压回路包括执行元件液压缸(8),所述执行元件液压缸(8)有两个工作油口,分别是第一工作油口(8a)和第二工作油口(8b),一种带载回退液压回路还包括：油路块(3),压力油口单向阀(1),回油口单向阀(10),安全阀(5),蓄能器(6)和压力传感器(7),所述油路块(3)上安装有三位四通电磁换向阀(2),电磁节流阀(4)和双向溢流阀(9),所述电磁节流阀(4)和双向溢流阀(9)为叠加式结构,所述三位四通电磁换向阀(2)为板式结构,所述电磁节流阀(4)、所述双向溢流阀(9)与所述三位四通电磁换向阀(2)叠加到一起采用螺钉连接到所述油路块(3)上表面。根据本发明的技术方案,在带载回退工况时,能够取得良好的工况效果。(The invention provides a loaded backspacing hydraulic loop, belonging to a hydraulic device. The utility model provides a hydraulic circuit that rolls back with carrying includes execute component pneumatic cylinder (8), execute component pneumatic cylinder (8) have two work hydraulic fluid ports, are first work hydraulic fluid port (8 a) and second work hydraulic fluid port (8 b) respectively, and a hydraulic circuit that rolls back with carrying still includes: the oil way comprises an oil way block (3), a pressure oil port check valve (1), an oil return port check valve (10), a safety valve (5), an energy accumulator (6) and a pressure sensor (7), wherein the oil way block (3) is provided with a three-position four-way electromagnetic directional valve (2), an electromagnetic throttle valve (4) and a two-way overflow valve (9), the electromagnetic throttle valve (4) and the two-way overflow valve (9) are of a stacked structure, the three-position four-way electromagnetic directional valve (2) is of a plate-type structure, and the electromagnetic throttle valve (4), the two-way overflow valve (9) and the three-position four-way electromagnetic directional valve (2) are stacked together and are connected to the upper surface of the oil way block (3. According to the technical scheme of the invention, a good working condition effect can be obtained under the load rollback working condition.)

1. The hydraulic circuit comprises an execution element, wherein the execution element adopts a hydraulic oil cylinder, the hydraulic oil cylinder is provided with a first working oil port and a second working oil port, the two working oil ports are respectively a first working oil port and a second working oil port, the first working oil port is communicated with a rodless cavity of the hydraulic oil cylinder, and the second working oil port is communicated with a rod cavity of the hydraulic oil cylinder.

2. An on-load rollback hydraulic circuit further includes a control element comprising: the oil way block, the pressure oil port check valve, the oil return port check valve, the three-position four-way electromagnetic directional valve, the electromagnetic throttle valve, the two-way overflow valve, the energy accumulator, the safety valve and the pressure sensor.

3. The on-load rollback hydraulic circuit according to claim 2, wherein in the control element, the three-position four-way electromagnetic directional valve is of a plate type structure, the middle position skill is J, the two-way overflow valve is of a stacked type structure, the electromagnetic throttle valve is of a stacked type structure, and the three-position four-way electromagnetic directional valve, the two-way overflow valve and the electromagnetic throttle valve are stacked together and connected to the oil path block through screws.

4. The on-load backspacing hydraulic circuit of claim 2, characterized in that the oil circuit block is of a rectangular structure and has 6 working oil ports, namely a third working oil port, a fourth working oil port, a fifth working oil port, a sixth working oil port, a seventh working oil port and an eighth working oil port.

Technical Field

The invention relates to the field of hydraulic pressure, in particular to an on-load backspacing hydraulic circuit.

Background

The toothed clutch hub is an important power transmission part in an automatic transmission of a vehicle, a roll forging device can be used for processing the product, a tail top loop of the roll forging device is controlled by hydraulic pressure, the loop is required to have a function of carrying a main shaft with a tail top and moving back synchronously, specifically, the tail top working condition of a general machine tool is that the machine tool is tightly propped against the main shaft to ensure propping force and rotates synchronously with the main shaft, a hydraulic cylinder is generally used for executing the action, and a thrust bearing is arranged at the front section of a piston rod of the hydraulic cylinder to realize the synchronous rotation with the main shaft. The roll forging equipment has the requirements on the operation condition of the tail jack on the basis of realizing the functions and simultaneously realizes the loaded returning synchronous motion of the tail jack, namely, the main shaft can drive the tail jack oil cylinder to retreat and move in the axial direction under the condition of keeping the jacking force after the tail jack is tightly jacked with the main shaft during the operation. The on-load rollback hydraulic circuit provided by the invention is designed according to the working condition requirements, and has positive significance for solving the problem of tail top oil cylinder action in roll forging equipment.

Disclosure of Invention

The invention aims to provide an on-load backspacing hydraulic circuit which solves the problem that a roller forging equipment tailstock device uses a hydraulic cylinder to realize the backspacing synchronous motion function of a tailstock on-load main shaft. The hydraulic circuit is convenient to manufacture and can obtain stable and reliable working effects.

In order to solve the technical problem, the on-load backspacing hydraulic circuit comprises an execution element, wherein the execution element adopts a hydraulic oil cylinder, the hydraulic oil cylinder is provided with a first working oil port and a second working oil port, the first working oil port is communicated with a rodless cavity of the hydraulic oil cylinder, and the second working oil port is communicated with a rod cavity of the hydraulic oil cylinder.

An on-load rollback hydraulic circuit includes a control element comprising: the oil way block, the pressure oil port check valve, the oil return port check valve, the three-position four-way electromagnetic directional valve, the electromagnetic throttle valve, the two-way overflow valve, the energy accumulator, the safety valve and the pressure sensor.

The pressure oil port one-way valve is connected by adopting a tubular structure and is provided with two oil ports, namely a pressure oil inlet and a pressure oil outlet, and the pressure oil inlet is connected with an oil source.

The oil return port one-way valve is connected by adopting a tubular structure, is provided with two oil ports which are respectively an oil return inlet and an oil return outlet, and the oil return outlet is connected with oil return.

The three-position four-way electromagnetic directional valve is of a plate structure, the middle position skill is J, the two-way overflow valve is of a stacked structure, the electromagnetic throttle valve is of a stacked structure, and the three-position four-way electromagnetic directional valve, the two-way overflow valve and the electromagnetic throttle valve are stacked together and are connected to the oil path block through screws.

The pressure sensor is connected to the oil circuit block by threads.

The energy accumulator is connected to the safety valve through threads, the safety valve is provided with three oil ports which are respectively a pressure oil working oil port, an oil return working oil port and an energy accumulator connecting working oil port, the pressure oil working oil port is connected to the oil way block through a hard pipe, the oil return working oil port is connected to oil return, and the energy accumulator working oil port is connected with the energy accumulator through threads.

The oil circuit block is of a rectangular structure and is provided with 6 working oil ports, namely a third working oil port, a fourth working oil port, a fifth working oil port, a sixth working oil port, a seventh working oil port and an eighth working oil port. The third working oil port is connected to a pressure oil outlet of the pressure oil port check valve through a hard pipe, the fourth working oil port is connected to an oil return inlet of the oil return port check valve through a hard pipe and a connector, the fifth working oil port is connected to a first working oil port of the actuating element hydraulic oil cylinder through a hard pipe and a connector, and the sixth working oil port is connected to a second working oil port of the actuating element hydraulic oil cylinder through a hard pipe and a connector.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without limiting the invention in which: fig. 1 is a hydraulic schematic diagram of the invention, fig. 2 is a structural diagram of a pressure oil port check valve, fig. 3 is a structural diagram of a three-position four-way electromagnetic directional valve, fig. 4 is a structural diagram of an electromagnetic throttle valve, fig. 5 is a structural diagram of a safety valve, fig. 6 is a structural diagram of a hydraulic cylinder, fig. 7 is a structural diagram of a two-way overflow valve, fig. 8 is a structural diagram of an oil return check valve.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.

The invention provides an on-load backspacing hydraulic circuit, which comprises an execution element hydraulic cylinder (8), wherein the execution element hydraulic cylinder (8) is provided with two working oil ports, as shown in figure 1, namely a first working oil port (8 a) and a second working oil port (8 b), as shown in figure 6.

An on-load rollback hydraulic circuit further comprising: the oil way block (3), the pressure oil port check valve (1), the oil return port check valve (10), the safety valve (5), the energy accumulator (6) and the pressure sensor (7).

The oil way block (3) is provided with a three-position four-way electromagnetic directional valve (2), an electromagnetic throttle valve (4) and a two-way overflow valve (9), the electromagnetic throttle valve (4) and the two-way overflow valve (9) are of a stacked structure, the three-position four-way electromagnetic directional valve (2) is of a plate structure, and the electromagnetic throttle valve (4), the two-way overflow valve (9) and the three-position four-way electromagnetic directional valve (2) are stacked together and are connected to the upper surface of the oil way block (3) through screws. As shown in fig. 9, the oil circuit block (3) has 6 working oil ports, which are a third working oil port (3 p), a fourth working oil port (3 t), a fifth working oil port (3 a), a sixth working oil port (3 b), a seventh working oil port (3 g) and an eighth working oil port (3 h), the fifth working oil port (3 a) is connected to the first working oil port (8 a) of the hydraulic cylinder (8) through a hard pipe and a joint, and the sixth working oil port (3 b) is connected to the second working oil port (8 b) of the hydraulic cylinder (8) through a hard pipe and a joint.

As shown in fig. 2, the check valve (1) with a pressure oil port has two oil ports, namely a pressure oil inlet (1 p) and a pressure oil outlet (1 t), the pressure oil inlet (1 p) is connected with an oil source Ps, and the pressure oil outlet is connected to a third working oil port (3 p) of the oil circuit block (3) by a hard pipe and a joint.

As shown in fig. 8, the oil return port check valve (10) has two oil ports, which are an oil return inlet (10P) and an oil return outlet (10 t), the oil return inlet (10P) is connected to the fourth working oil port (3 t) of the oil path block (3) by a hard tube and a joint, and the oil return outlet (10 t) is connected to an oil return P₀。

As shown in fig. 5, the safety valve (5) has three working oil ports, i.e., a pressure oil working port (5P) and an oil return working port P₀And the energy accumulator is connected with a working oil port (5 a), the pressure oil working oil port (5 p) is connected to a seventh working oil port (3 g) of the oil circuit block (3) through a hard pipe and a connector, and the energy accumulator is connected with the working oil port (5 a) and is connected to the energy accumulator (6) through threads.

The pressure sensor (7) is connected to an eighth working oil port (3 h) of the oil circuit block (3) through threads.

Four oil paths are formed in the oil path block (3), and are a pressure oil path P, an oil return path T, a control oil path A and a control oil path B respectively.

As shown in fig. 9, the pressure oil path P communicates with the three-position four-way electromagnetic directional valve (2P) port and the third working oil port (3P) port of the oil path block (3).

As shown in fig. 9, the oil return path T communicates with the three-position four-way electromagnetic directional valve (2T) port and the fourth working oil port (3T) port of the oil path block (3).

As shown in fig. 9, the control oil path a communicates the three-position four-way electromagnetic directional valve (2 a) port, the electromagnetic throttle valve (4 p) ports and (4 t) ports, the two-way relief valve (9 p) port and (9 a) port to the fifth working oil port (3 a) port of the oil path block (3).

As shown in fig. 9, the control oil passage B communicates the three-position four-way electromagnetic directional valve (2B) port, the two-way overflow valve (9 t) port and the two-way overflow valve (9B) port to the sixth working oil port (3B) port of the oil passage block (3).

In order to realize the loaded returning working condition of the tail jacking oil cylinder of the roll forging equipment, a bidirectional overflow valve (9) is adopted on a hydraulic circuit, during work, a three-position four-way electromagnetic directional valve (2) is reversed, the tail jacking oil cylinder feeds, the electromagnetic throttle valve (4) is reversed when the tail jacking oil cylinder fast forwards, the electromagnetic throttle valve (4) does not reverse when the tail jacking oil cylinder slowly advances, the slow advancing speed of the tail jacking oil cylinder is adjusted by the electromagnetic throttle valve (4), after the tail jacking oil cylinder is tightly propped against a main shaft, the axial thrust of the main shaft is greater than the jacking force of the tail jacking oil cylinder, a piston rod of the tail jacking oil cylinder retreats, the pressure of a rodless cavity of the tail jacking oil cylinder is increased at the moment, when the pressure reaches the set opening pressure of the bidirectional overflow valve (9), the bidirectional overflow. By adopting the loop, the opening pressure of the bidirectional overflow valve can be manually and flexibly adjusted according to actual needs, and the operation is convenient. Meanwhile, in order to ensure the working condition to be safe and reliable, a pressure relay (7) is adopted to detect the loaded pressure, and when the opening pressure of the two-way overflow valve (9) is adjusted to be too high or the two-way overflow valve fails to overflow, the pressure relay (7) starts a signaling device to give an alarm, so that the hydraulic circuit element and the tail jacking oil cylinder are not damaged.

The present invention is not limited to the details of the above embodiments, and various simple modifications can be made to the technical solution of the present invention within the technical idea of the present invention, and the technical solution of the present invention falls within the protection scope of the present invention.