CN214036320U - Hydraulic variable device capable of realizing flexible switching - Google Patents

Abstract

The utility model discloses a can realize hydraulic pressure variable device of flexible switching, including the oil duct casing, oil duct casing inner chamber is equipped with spring gland, spring gland's outside terminal surface is equipped with first retaining ring, spring gland's hole is equipped with the combination of outer spring and inner spring, and the terminal surface of outer spring is equipped with the variable valve rod, and the inboard head of variable valve rod is equipped with the plug screw, and the inner chamber of variable valve rod is equipped with smooth core, and the terminal surface of variable valve rod is equipped with the gland, and the periphery of gland is equipped with the sealing washer, and the terminal surface of gland is equipped with the second retaining ring, and the middle cavity of oil duct casing is equipped with the flow distribution subassembly. This patent can realize flexible hydraulic pressure variable device who switches, when fluid entered from the variable hydraulic fluid port, the pressure of fluid offset the combination elasticity of outer spring and inner spring, promoted the variable valve rod and removed, and the smooth core is also corresponding controls to make variable valve rod and join in marriage a class subassembly and communicate with each other, fluid also communicates with each other from the corresponding oil duct of variable valve rod and joining in marriage a class subassembly, reaches final flexible hydraulic pressure variable and switches.

Description

Hydraulic variable device capable of realizing flexible switching

Technical Field

The utility model relates to a hydraulic pressure variable technical field specifically is a can realize hydraulic pressure variable device of flexible switching.

Background

The hydraulic pump and the hydraulic motor are the most important power elements and actuating elements in the hydraulic field, and the multi-action variable hydraulic pump or the variable hydraulic motor has many advantages, so the variable hydraulic pump is widely applied to machines such as extrusion forging, steel rolling and injection molding, and the variable hydraulic motor is an important part of walking engineering machinery, agricultural machinery, environment-friendly machinery and coal mine machinery.

The displacement of the hydraulic machine is difficult to change, and if the designed maximum speed is to be reached, a very large flow input is required, which is too high for the external system and even another device has to be installed to meet the demand. Various variable valve core structures are put forward in the market at present, namely, a hydraulic variable device is added in a hydraulic mechanism, so that the purpose of changing the displacement is achieved, but the current variable valve core structure has a priority turning direction, and when the variable valve core structure is used by a customer, positive and negative rotation needs to be distinguished, so that the variable valve core structure is easy to make mistakes, and when the displacement is changed, work is done, so that heat is generated, and the efficiency is reduced.

Disclosure of Invention

An object of the utility model is to provide a can realize flexible hydraulic pressure variable device who switches, concrete content is for adopting combination formula double-valve core, realizes the flexible switching of full discharge volume to half discharge volume, and this hydraulic pressure variable device does not have the priority to revolve to, more makes things convenient for the customer to use, especially switches to when half discharge volume, does not have the high pressure section of doing work, reduces the advantage of the loss of generating heat, has solved the problem among the prior art.

In order to achieve the above object, the utility model provides a following technical scheme:

the utility model provides a can realize hydraulic pressure variable device of flexible switching, including the oil duct casing, the inner chamber of oil duct casing is equipped with spring gland, spring gland's outside terminal surface is equipped with first retaining ring, spring gland's hole is equipped with the combination of outer spring and inner spring, the inner spring cup joints inside the outer spring, the terminal surface of outer spring is equipped with the variable valve rod, the inboard head of variable valve rod is equipped with the plug screw, the inner chamber of variable valve rod is equipped with smooth core, the terminal surface of variable valve rod is equipped with the gland, the periphery of gland is equipped with the sealing washer, the terminal surface of gland is equipped with the second retaining ring, the middle cavity of oil duct casing is equipped with the flow distribution subassembly.

Preferably, the top end of the oil duct shell is provided with a first oil port, a second oil port and a variable oil port.

Preferably, the flow distribution assembly is provided with a first oil path, a second oil path, a third oil path and a fourth oil path, the first oil path and the second oil path are communicated with the first oil port, and the third oil path and the fourth oil path are communicated with the second oil port.

Preferably, the variable oil port is communicated with the variable valve rod hole.

Preferably, the combination of the outer spring and the inner spring is arranged on one side end face of the variable valve rod.

Compared with the prior art, the beneficial effects of the utility model are as follows:

this patent can realize hydraulic pressure variable device of flexible switching, when fluid enters from the variable hydraulic fluid port, offset the combination elasticity of outer spring and inner spring, promote the variable valve rod and remove, let the oil groove of variable valve rod communicate with each other with the flow distribution subassembly, make first oil circuit, fourth oil circuit and the oil circuit intercommunication that corresponds, smooth core also corresponding removal under the effect of fluid, make the second oil circuit, the third oil circuit respectively with the first oil circuit that corresponds, the fourth oil circuit becomes impassable, thereby reach the purpose of half discharge capacity work, flexible hydraulic pressure variable switching has been realized, and this variable speed valve rod is the non-priority soon with the maximum advantage of the integrated configuration of smooth core, make things convenient for the customer to use more.

Drawings

Fig. 1 is an overall sectional view of the present invention.

In the figure: 1. an oil duct housing; 2. a spring gland; 3. a first retainer ring; 4. an inner spring; 5. an outer spring; 6. a variable valve stem; 7. a plug screw; 8. a sliding core; 9. a seal ring; 10. a second retainer ring; 11. a gland; 12. a flow distribution assembly; 13. a first oil passage; 14. a second oil passage; 15. a third oil passage; 16. a fourth oil passage; 17. a first oil port; 18. a second oil port; 19. and a variable oil port.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1, a hydraulic variable device capable of realizing flexible switching includes an oil duct housing 1, the oil duct housing 1 is provided with a first oil port 17, a second oil port 18 and a variable oil port 19, when oil enters from the first oil port 17 or the second oil port 18, the combined elastic action of an outer spring 5 and an inner spring 4 makes a variable valve rod 6 be in a middle position, so that a flow distribution assembly 12 has a first oil path 13, a second oil path 14 communicated with the first oil port 17, and a third oil path 15 and a fourth oil path 16 communicated with the second oil port 18. Therefore, when oil directly enters from the first oil port 17 of the oil duct shell 1, the oil flows through the first oil path 13 and the second oil path 14 and then enters the flow distribution assembly 12, and the flow distribution assembly 12 transmits hydraulic energy out; on the other hand, the oil after oil return passes through the third oil path 15 and the fourth oil path 16 through the flow distribution assembly 12 and then flows out from the second oil port 18, so that one circulation of oil inlet and return with full displacement is realized. When oil enters from the variable oil port 19, the combined elastic force of the outer spring 5 and the inner spring 4 is counteracted, the variable valve rod 6 is pushed to move, the oil groove of the variable valve rod 6 is communicated with the flow distribution assembly 12, the first oil path 13, the fourth oil path 16 and the corresponding oil paths are communicated, the sliding core 8 also moves correspondingly under the action of the oil, and the second oil path 14 and the third oil path 15 are respectively not communicated with the corresponding first oil path 13 and the corresponding fourth oil path 16, so that the purpose of half-displacement work is achieved, and flexible hydraulic variable switching is realized. In the whole process, the first retainer ring 3 limits the position of the spring gland 2, the sealing ring 9 on the right side prevents leakage of oil, and the second retainer ring 10 limits the position of the gland 11, so that the whole working stroke of the variable valve rod 6 is ensured. When the oil enters the second oil port 18 instead of the first oil port 17, the working principle of full displacement and half displacement is as above, and only the position of the sliding core 8 is close to the screw plug 7 in the opposite direction under the thrust of the oil.

In summary, the following steps: this patent can realize flexible switching's hydraulic pressure variable device, when fluid enters from variable hydraulic fluid port 19, offset outer spring 5 and inner spring 4's combination elasticity, promote variable valve rod 6 and remove, let variable valve rod 6's oil groove and join in marriage a class subassembly 12 and communicate with each other, make first oil circuit 13, fourth oil circuit 16 and the oil circuit intercommunication that corresponds, smooth core 8 also corresponding removal under the effect of fluid, make second oil circuit 14, third oil circuit 15 respectively with corresponding first oil circuit 13, fourth oil circuit 16 become unable, thereby reach half displacement work's purpose, flexible hydraulic pressure variable switching has been realized.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (5)

1. A hydraulic variable device capable of realizing flexible switching comprises an oil passage shell (1) and is characterized in that: the inner chamber of oil duct casing (1) is equipped with spring gland (2), the outside terminal surface of spring gland (2) is equipped with first retaining ring (3), the hole of spring gland (2) is equipped with the combination of outer spring (5) and inner spring (4), inner spring (4) cup joint inside outer spring (5), the terminal surface of outer spring (5) is equipped with variable valve rod (6), the inboard head of variable valve rod (6) is equipped with plug screw (7), the inner chamber of variable valve rod (6) is equipped with smooth core (8), the terminal surface of variable valve rod (6) is equipped with gland (11), the periphery of gland (11) is equipped with sealing washer (9), the terminal surface of gland (11) is equipped with second retaining ring (10), the middle cavity of oil duct casing (1) is equipped with joins in marriage a class subassembly (12).

2. The hydraulic variable device capable of realizing flexible switching according to claim 1, wherein the top end of the oil gallery housing (1) is provided with a first oil port (17), a second oil port (18) and a variable oil port (19).

3. The hydraulic variable device capable of realizing flexible switching according to claim 1, wherein the flow distribution assembly (12) has a first oil path (13), a second oil path (14), a third oil path (15) and a fourth oil path (16), the first oil path (13) and the second oil path (14) are communicated with the first oil port (17), and the third oil path (15) and the fourth oil path (16) are communicated with the second oil port (18).

4. The hydraulic variable device capable of realizing flexible switching according to claim 2, characterized in that the variable oil port (19) is communicated with the variable valve rod (6) hole.

5. A flexibly switchable hydraulic variable displacement device according to claim 1, characterized in that the combination of the outer spring (5) and the inner spring (4) is arranged on one end face of the variable valve rod (6).

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