Tandem type hydraulic oil way system of double-cylinder clamping jaw and clamping jaw

Abstract

The utility model relates to the technical field of double-oil-cylinder oil way systems, in particular to a tandem type hydraulic oil way system of a double-cylinder clamping jaw, which comprises a main oil cylinder, an auxiliary oil cylinder, an oil cylinder oil supply control device and two oil way converters, and each oil way converter is provided with an oil supply port, an oil cylinder front cabin connecting port, an oil cylinder rear cabin connecting port, an external pipeline connector and an oil supplementing port. An oil cylinder front cabin connecting port of the oil way converter is communicated with a front cabin of the oil cylinder, an oil cylinder rear cabin connecting port of the oil way converter is communicated with a rear cabin of the oil cylinder, and an external pipeline connector of the oil way converter on the main oil cylinder is connected with an oil supply port of the oil way converter on the auxiliary oil cylinder through an oil pipe. An oil supply port of the oil way converter on the main oil cylinder is connected with an oil cylinder oil supply control device through an oil pipe, and an external pipeline connector of the oil way converter on the auxiliary oil cylinder is connected with the oil cylinder oil supply control device through an oil pipe. According to the tandem oil way system, the number of oil pipes and oil pipe joints is reduced, the oil leakage probability of the system is reduced, the maintenance cost is reduced, and the tandem double oil cylinders can rapidly, stably and synchronously work.

Description

Technical Field

[0001] The utility model relates to the technical field of double-cylinder oil circuit systems, in particular to a series hydraulic oil circuit system and a jaw of a double-cylinder jaw. Background Art

[0002] Double-cylinder jaws are applied in various working scenarios. For example, a rotary jaw with double cylinders is one of them. Generally, a rotary jaw with double cylinders mainly includes a rotating table with an oil circuit block and a rotary flow divider, and two jaw bodies. The two jaw bodies do not interfere with each other. Each jaw body is equipped with an oil cylinder. The total hydraulic system supplies oil to the two oil cylinders respectively through the oil circuit block and the rotary flow divider. The oil circuits of the two oil cylinders are mostly connected in parallel. Each oil cylinder requires an oil inlet circuit and an oil return circuit. In order to ensure the balance of the oil pressure of the two oil cylinders, a hydraulic balance valve is usually used to control and operate the two jaw bodies. However, it is often found that the hydraulic balance valve is easily damaged during operation, resulting in unbalanced opening of the two jaw bodies, affecting the grasping capacity. Moreover, frequently replacing the hydraulic balance valve also requires a lot of cost investment. In addition, the parallel oil circuit is easily contaminated, affecting the normal operation of the subsequent oil cylinders.

[0003] Therefore, it is necessary to study a series hydraulic oil circuit system and a jaw that do not require a hydraulic balance valve and can achieve the balance of double-cylinder operation. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is to overcome the above-mentioned technical defects and provide a series hydraulic oil circuit system and a jaw of a double-cylinder jaw.

[0005] A series hydraulic oil circuit system of a double-cylinder jaw includes a main oil cylinder, a sub-oil cylinder and an oil cylinder oil supply control device. Each of the main oil cylinder and the sub-oil cylinder is equipped with an oil circuit converter. The oil circuit converter is provided with an oil supply port, an oil cylinder front chamber connection port, an oil cylinder rear chamber connection port, an external pipeline connection port and a make-up oil port. The oil supply port is communicated with the oil cylinder rear chamber connection port, and the external pipeline connection port is communicated with the oil cylinder front chamber connection port. A channel is provided between the communication oil circuit of the oil supply port and the oil cylinder rear chamber connection port and the communication oil circuit of the external pipeline connection port and the oil cylinder front chamber connection port. The channel is communicated with the make-up oil port, and a make-up oil valve is arranged at the make-up oil port. The make-up oil port can be used to add hydraulic oil, and the make-up oil valve can control the on-off of the channel;

[0006] The oil cylinder front chamber connection port of the oil circuit converter is communicated with the front chamber of the oil cylinder, and the oil cylinder rear chamber connection port is communicated with the rear chamber of the oil cylinder;

[0007] The external pipeline connection port of the oil circuit converter on the main oil cylinder is connected to the oil supply port of the oil circuit converter on the sub-oil cylinder through a pipeline. The oil supply port of the oil circuit converter on the main oil cylinder is connected to the oil cylinder oil supply control device through a pipeline. The external pipeline connection port of the oil circuit converter on the sub-oil cylinder is connected to the oil cylinder oil supply control device through a pipeline.

[0008] A jaw of a series hydraulic oil circuit system with the aforementioned double-cylinder jaws, comprising a rotating table and relatively arranged left jaw body and right jaw body. A boom connecting body is provided at the top of the rotating table, and a mounting seat is provided at the bottom of the rotating table. The left jaw body is configured with a main oil cylinder, and the right jaw body is configured with a secondary oil cylinder. The telescopic end of the main oil cylinder is hinged to the left jaw body, and the fixed end is hinged to the mounting seat. The telescopic end of the secondary oil cylinder is hinged to the right jaw body, and the fixed end is hinged to the mounting seat.

[0009] Advantages of the present utility model: The series oil circuit system of the present utility model has a reasonable structure, greatly saves the number of oil pipes, reduces unnecessary oil pipe joints, thereby reducing the probability of oil leakage in the hydraulic system and lowering the maintenance cost. When the hydraulic pressure jacks up the main oil cylinder, the oil discharged from the front chamber of the main oil cylinder is used to push the hydraulic rod of the secondary oil cylinder to achieve synchronous operation; The hydraulic jaws applying the series oil circuit system of the present utility model have stable clamping, no slipping phenomenon, and significantly improved clamping work efficiency. Description of the Drawings

[0010] Figure 1 is a schematic diagram of the oil circuit of a series hydraulic oil circuit system of a double-cylinder jaw of the present utility model;

[0011] Figure 2 is a schematic diagram of the internal structure of a series hydraulic oil circuit system of a double-cylinder jaw of the present utility model;

[0012] Figure 3 is a schematic diagram of the jaw of a series hydraulic oil circuit system with a double-cylinder jaw of the present utility model.

[0013] As shown in the figure: 1, main oil cylinder; 2, secondary oil cylinder; 3, oil cylinder oil supply control device; 4, oil circuit converter; 301, main oil chamber; 302, secondary oil chamber; 401, oil supply port; 402, oil cylinder front chamber connection port; 403, oil cylinder rear chamber connection port; 404, external pipeline connection port; 405, oil replenishment port; 406, channel; 407, oil replenishment valve; 5, rotating table; 6, left jaw body; 7, right jaw body; 8, boom connecting body; 9, mounting seat. Detailed Embodiment

[0014] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.

[0015] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, the meaning of "a plurality" is two or more, unless otherwise specifically defined.

[0016] In the description of the embodiments of the present utility model, if a certain feature is referred to as "arranged", "fixed", "connected", "installed" on another feature, it can be directly arranged, fixed, connected on another feature, or indirectly arranged, fixed, connected, installed on another feature.

[0017] In the description of the embodiments of the present utility model, if it involves "several", its meaning is more than one; if it involves "a plurality", its meaning is more than two; if it involves "greater than", "less than", "exceeding", it should be understood as not including the present number; if it involves "above", "below", "within", it should be understood as including the present number. If it involves "first" and "second", it should be understood as being used to distinguish technical features and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features or implicitly specifying the sequence relationship of the indicated technical features.

[0018] The following further describes the present utility model in detail with reference to the drawings.

[0019] As Figure 1 and 2 shown, a series hydraulic oil circuit system of a double-cylinder jaw includes a main oil cylinder 1, a sub-oil cylinder 2, and an oil cylinder oil supply control device 3. Both the main oil cylinder 1 and the sub-oil cylinder 2 are configured with an oil circuit converter 4;

[0020] The oil path converter 4 is provided with an oil supply port 401, a front cabin connection port 402 of the oil cylinder, a rear cabin connection port 403 of the oil cylinder, an external pipeline interface 404 and a supplementary oil port 405. The oil supply port 401 is communicated with the rear cabin connection port 403 of the oil cylinder, and the external pipeline interface 404 is communicated with the front cabin connection port 402 of the oil cylinder. A channel 406 is provided between the communication oil path of the oil supply port 401 and the rear cabin connection port 403 of the oil cylinder and the communication oil path of the external pipeline interface 404 and the front cabin connection port 402 of the oil cylinder. The channel 406 is communicated with the supplementary oil port 405, and a supplementary oil valve 407 is arranged at the supplementary oil port 405. The supplementary oil port 405 can be used to add hydraulic oil, and the supplementary oil valve 407 can control the on-off of the channel 406;

[0021] The front cabin connection port 402 of the oil path converter 4 of the oil cylinder is communicated with the front cabin of the oil cylinder, and the rear cabin connection port 403 of the oil path converter 4 of the oil cylinder is communicated with the rear cabin of the oil cylinder;

[0022] The external pipeline interface 404 of the oil path converter 4 on the main oil cylinder 1 is connected to the oil supply port 401 of the oil path converter 4 on the auxiliary oil cylinder 2 through a pipeline. The oil supply port 401 of the oil path converter 4 on the main oil cylinder 1 is connected to the oil cylinder oil supply control device 3 through a pipeline. The external pipeline interface 404 of the oil path converter 4 on the auxiliary oil cylinder 2 is connected to the oil cylinder oil supply control device 3 through a pipeline.

[0023] As Figure 3 shown, a jaw of a series hydraulic oil path system with a double-cylinder jaw as described above includes a rotating table 5 and a left jaw body 6 and a right jaw body 7 arranged oppositely. A boom connecting body 8 is provided at the top of the rotating table 5, and a mounting seat 9 is provided at the bottom of the rotating table 5. One main oil cylinder 1 is configured for the left jaw body 6, and one auxiliary oil cylinder 2 is configured for the right jaw body 7. The telescopic end of the main oil cylinder 1 is hinged to the left jaw body 6, and the fixed end is hinged to the mounting seat 9. The telescopic end of the auxiliary oil cylinder 2 is hinged to the right jaw body 7, and the fixed end is hinged to the mounting seat 9. One oil path converter 4 is configured for each of the main oil cylinder 1 on the left jaw body 6 and the auxiliary oil cylinder 2 on the right jaw 7, and they are connected in series according to the Figure 1 shown pipeline.

[0024] This jaw can be applied to equipment such as grapples;

[0025] The jaw applying the double-cylinder series oil system of the present utility model has the following advantages:

[0026] 1. Anti-slip, not affected by the gravity of the jaw, avoiding the easy-slip characteristic of the double cylinders in the parallel oil path;

[0027] 2. Save oil, the oil consumption of the series type is greatly reduced compared with that of the parallel type;

[0028] 3. By only controlling the oil supply and return oil of the rear chamber of the main oil cylinder, the operation of the entire double-cylinder system can be controlled, without the need to simultaneously control the oil inlet and return oil of two oil cylinders through a parallel oil circuit system. The oil circuit has a small working load, low temperature, and provides effective protection.

[0029] 4. The control speed of the double cylinders is increased, enabling the two jaws to close quickly, the clamping of the two jaws to be stable, and the working efficiency to be improved.

[0030] As Figure 1 As shown in Figure 1 , an oil supply control device 3 for an oil cylinder is presented, which includes a main oil chamber 301 and a secondary oil chamber 302, and valves are configured for both the main oil chamber 301 and the secondary oil chamber 302.

[0031] When this embodiment is in use, first, the state between the main oil chamber 301 and the rear chamber of the main oil cylinder 1 is filled with oil, and the valve of the secondary oil chamber 302 is opened.

[0032] The rear chamber of the main oil cylinder 1 is filled to the full oil state through the oil supply control device 3 for the oil cylinder. During this process, the telescopic rod of the main oil cylinder 1 moves forward to squeeze the front chamber, and the hydraulic oil inside the front chamber flows through the oil pipe connected to the oil supply port 401 of the oil circuit converter 4 on the main oil cylinder 1 to the rear chamber of the secondary oil cylinder 2. The telescopic rod of the main oil cylinder 1 extends to the maximum stroke state. However, the telescopic rod of the secondary oil cylinder 2 may not be in the maximum stroke state. Therefore, it is necessary to open the oil replenishing port 405 of the oil circuit converter 4 on the main oil cylinder 1, that is, remove the oil replenishing valve 407. The rear chamber of the secondary oil cylinder 2 is filled with hydraulic oil through this oil replenishing port 405, so that the telescopic rod of the secondary oil cylinder 2 extends to the maximum stroke. Then, close the oil replenishing port 405 of the oil circuit converter 4 on the main oil cylinder 1, and then open the oil replenishing port 405 of the oil circuit converter 4 on the secondary oil cylinder 2 to replenish oil, so that the space between the front chamber of the secondary oil cylinder 2 and the secondary oil chamber 302 is filled with oil, and then close the valve of the secondary oil chamber 302.

[0033] At this time, the series oil circuit systems among the main oil cylinder 1, the secondary oil cylinder 2, and the oil supply control device 3 for the oil cylinder are all in the full oil state, and the synchronous control of the working states of the main oil cylinder 1 and the secondary oil cylinder 2 can be carried out. For example, when the main oil chamber 301 of the oil supply control device 3 for the oil cylinder shrinks to supply oil to the rear chamber of the main oil cylinder 1, the front chamber of the secondary oil cylinder 2 returns oil to the secondary oil chamber 302, and the telescopic rods of the main oil cylinder 1 and the secondary oil cylinder 2 work in the opening state.

[0034] When implementing the double-cylinder series oil system of the present utility model, attention should be paid to setting relevant parameters such as the inner diameter of the fixed cylinder, the diameter and length of the telescopic rod of the main oil cylinder and the secondary oil cylinder, so that the strokes of the two oil cylinders are consistent.

[0035] Meanwhile, the content not described in detail in this specification belongs to the well-known prior art in the art.

[0036] The above description is made on the present utility model and its implementation manners. Such description is not restrictive. What is shown in the drawings is only one of the implementation manners of the present utility model, and the actual structure is not limited thereto. Generally speaking, if those of ordinary skill in the art are inspired by it and design, without creative efforts, structural manners and embodiments similar to the technical solution without departing from the gist of the creation of the present utility model, they shall fall within the protection scope of the present utility model.

Claims

1. A series hydraulic oil circuit system of a double-cylinder gripper, characterized in that: The invention comprises a main oil cylinder (1), a secondary oil cylinder (2) and an oil cylinder oil supply control device (3), wherein the main oil cylinder (1) and the secondary oil cylinder (2) are each provided with an oil circuit converter (4). The oil circuit converter (4) is provided with an oil supply port (401), an oil cylinder front compartment connection port (402), an oil cylinder rear compartment connection port (403), an external pipeline interface (404) and an oil replenishment port (405); the oil supply port (401) is in communication with the oil cylinder rear compartment connection port (403); the external pipeline interface (404) is in communication with the oil cylinder front compartment connection port (402); a channel (406) is provided between the oil circuits connecting the oil supply port (401) and the oil cylinder rear compartment connection port (403) and the external pipeline interface (404) and the oil circuits connecting the oil cylinder front compartment connection port (402); the channel (406) is in communication with the oil replenishment port (405), and an oil replenishment valve (407) is provided at the oil replenishment port (405); the oil replenishment port (405) can be used to add hydraulic oil, and the oil replenishment valve (407) can control the on / off of the channel (406); The oil cylinder front compartment connection port (402) of the oil circuit converter (4) is in communication with the front compartment of the oil cylinder, and the oil cylinder rear compartment connection port (403) is in communication with the rear compartment of the oil cylinder; The external pipeline interface (404) of the oil circuit converter (4) on the master cylinder (1) is connected to the oil supply port (401) of the oil circuit converter (4) on the slave cylinder (2) through an oil pipe, the oil supply port (401) of the oil circuit converter (4) on the master cylinder (1) is connected to the oil cylinder oil supply control device (3) through an oil pipe, and the external pipeline interface (404) of the oil circuit converter (4) on the slave cylinder (2) is connected to the oil cylinder oil supply control device (3) through an oil pipe.

2. A clamping jaw of a tandem hydraulic oil system with a double-cylinder clamping jaw as claimed in claim 1, comprising a rotating platform (5) and a left claw body (6) and a right claw body (7) arranged opposite to each other, a boom connector (8) being arranged on the top of the rotating platform (5), and a mounting seat (9) being arranged on the bottom of the rotating platform (5), characterized in that: The left claw body (6) is equipped with a main oil cylinder (1), and the right claw body (7) is equipped with a secondary oil cylinder (2). The telescopic end of the main oil cylinder (1) is hinged to the left claw body (6), and the fixed end is hinged to the mounting seat (9). The telescopic end of the secondary oil cylinder (2) is hinged to the right claw body (7), and the fixed end is hinged to the mounting seat (9).

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