Hydraulic shaft

Abstract

The utility model relates to the technical field of hydraulic shafts, and solves the problems that a shaft body cannot be changed according to the size of a sleeve, so that the shaft body cannot adapt to the mounting size of the sleeve, the shaft body is inconvenient to mount, and certain difficulty is brought to overhaul. The hydraulic shaft comprises a part shaft body, a first circular groove and a second circular groove are formed in the top of the part shaft body, an oil injection valve assembly is arranged in the first circular groove, and a pressure relief assembly used for relieving pressure in a cavity is arranged in the second circular groove. The pressure relief assembly comprises a pressure relief column arranged in the second circular groove, a threaded hole is formed in the top of the pressure relief column, a threaded column is arranged in the threaded hole, an ejector rod is arranged at the bottom end of the threaded column, a pressure relief cavity is formed in the bottom end of the pressure relief column, and the top end of the pressure relief cavity communicates with the threaded hole. A ball is arranged at the inner bottom of the threaded hole, and a pressure relief hole is formed in the side face of the pressure relief column.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic shafts, in particular to a hydraulic shaft. Background Art

[0002] The T-type hydraulic bearing disclosed in publication number CN204533206U includes a fixed panel and a fixed base plate, a "convex"-shaped movable shaft is provided between the fixed panel and the fixed base plate, the convex part of the "convex"-shaped movable shaft passes through the fixed panel, an upper fixed block and a lower fixed block are also provided between the fixed panel and the fixed base plate, and the "convex"-shaped movable shaft is clamped between the upper fixed block and the lower fixed block; a plurality of pressure chambers are provided inward on one side of the fixed panel, the fixed base plate, the upper fixed block and the lower fixed block close to the "convex"-shaped movable shaft, and an oil inlet is also provided on the fixed base plate, and the oil inlet is connected to each pressure chamber.

[0003] It can perform horizontal high-speed movement with a frequency of up to 2-2000hz, and during high-speed operation, it exhibits a constant thermal expansion coefficient, a constant power factor, and a constant accuracy.

[0004] However, the shaft cannot be changed according to the size of the kit, and thus cannot adapt to the installation size of the kit, making it inconvenient to install and bringing certain difficulties to maintenance. This solution is not efficient for shaft maintenance. Utility Model Content

[0005] To address the deficiencies of the prior art, the present invention provides a hydraulic shaft that solves the problem that the shaft body cannot be changed according to the size of the kit, thereby being unable to adapt to the installation size of the kit, making it inconvenient to install and bringing certain difficulties to maintenance.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a hydraulic shaft, comprising a shaft body, the top of which is respectively provided with a first circular groove and a second circular groove, and an oil filling valve assembly is arranged inside the first circular groove, while a pressure relief assembly for relieving pressure in the cavity is arranged inside the second circular groove.

[0007] In a specific embodiment, the pressure relief assembly includes a pressure relief column arranged inside the second circular groove, and a threaded hole is provided at the top of the pressure relief column, and a threaded column is provided inside the threaded hole, and a push rod is provided at the bottom end of the threaded column, and a pressure relief cavity is provided inside the bottom end of the pressure relief column, and the top end of the pressure relief cavity is communicated with the threaded hole, and a sphere is provided at the inner bottom of the threaded hole.

[0008] In a specific embodiment, a pressure relief hole is opened on the side of the pressure relief column, and one end of the pressure relief hole is communicated with one side of the threaded hole.

[0009] In a specific embodiment, the oil filling valve assembly includes an oil filling column arranged inside the first circular groove, and an even oil filling hole is opened at the top of the oil filling column, and a blocking ball larger than the hole diameter is provided at the bottom of the oil filling hole, and a spring is provided at the bottom of the blocking ball.

[0010] In a specific embodiment, the bottom of the oil injection column is connected through a first cavity, and the first cavity is a 360-degree annular cavity.

[0011] In a specific embodiment, the bottom of the pressure relief column is connected through a second cavity, and the second cavity is a 360-degree annular cavity.

[0012] Compared with the prior art, the present invention provides a hydraulic shaft with the following beneficial effects:

[0013] In the technical solution disclosed by the present invention, the setting of the pressure relief component is utilized. When installing the component shaft body, the component shaft body is sleeved in the kit, and high-pressure oil is injected into the interior of the first cavity through the oil filling column. At this time, the high-pressure oil will impact the ball blocking ball and compress the spring, and then reach the interior of the first cavity. When the high-pressure oil is injected, the component shaft body is displaced in the circumferential direction under the action of pressure, and the size installation requirements can be met. When it needs to be removed for inspection and maintenance, it is only necessary to rotate the threaded column so that the threaded column moves up inside the threaded hole. At this time, the pressure inside the second cavity will be released along the second cavity into the pressure relief cavity and lift the ball. At this time, the pressure will enter the interior of the threaded hole from the pressure relief cavity and be released from the inside of the pressure relief hole, thereby causing the size of the component shaft body to be restored, thereby achieving the purpose of convenient disassembly and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0015] Figure 1 This is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the structure of the second circular groove and the first cavity of the utility model;

[0017] Figure 3 This is a schematic diagram of the structure of the pressure relief assembly of the utility model;

[0018] Figure 4 This is a structural diagram of the oil filling valve assembly of the utility model.

[0019] In the figure: 1. Shaft body; 2. First circular groove; 3. Second circular groove; 4. Oil valve assembly; 41. Oil filling column; 42. Oil filling hole; 43. Ball plug; 44. Spring; 5. Pressure relief assembly; 51. Pressure relief column; 511. Pressure relief chamber; 512. Ball; 513. Pressure relief hole; 52. Threaded hole; 53. Threaded column; 54. Push rod; 6. First cavity; 7. Second cavity. DETAILED DESCRIPTION

[0020] The following will describe the implementation methods of the present application in detail with reference to the accompanying drawings and examples, so that the implementation process of how the present application applies technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0021] Figures 1-4 This is an embodiment of the present invention, a hydraulic shaft, including a shaft body 1, the top of the shaft body 1 is respectively provided with a first circular groove 2 and a second circular groove 3, and the interior of the first circular groove 2 is provided with an oil filling valve assembly 4, and the interior of the second circular groove 3 is provided with a pressure relief assembly 5 for relieving pressure in the cavity.

[0022] The specific problem addressed by this specific embodiment is to solve the problem that the shaft cannot be changed according to the size of the kit, and thus cannot adapt to the installation size of the kit, making it inconvenient to install and bringing certain difficulties to maintenance. The present invention utilizes the setting of the pressure relief assembly 5. When installing the shaft body 1, the shaft body 1 is sleeved in the kit, and high-pressure oil is injected into the first cavity 6 through the oil filling column 41. At this time, the high-pressure oil will impact the ball 43 and compress the spring 44, and then reach the inside of the first cavity 6. When the high-pressure oil is injected, the shaft body 1 is displaced in the circumferential direction under the action of pressure, which can meet the size installation requirements. When it needs to be removed for inspection and maintenance, it is only necessary to rotate the threaded column 53 so that the threaded column 53 moves up inside the threaded hole 52. At this time, the pressure inside the second cavity 7 will be released along the second cavity 7 to the pressure relief chamber 511 and lift the ball 512. At this time, the pressure will enter the inside of the threaded hole 52 from the pressure relief chamber 511 and be released from the inside of the pressure relief hole 513, thereby causing the size of the shaft body 1 to be restored, thereby achieving the purpose of convenient disassembly and maintenance.

[0023] The pressure relief assembly 5 includes a pressure relief column 51 arranged inside the second circular groove 3, and a threaded hole 52 is provided at the top of the pressure relief column 51, and a threaded column 53 is provided inside the threaded hole 52, and a push rod 54 is provided at the bottom end of the threaded column 53. A pressure relief chamber 511 is provided inside the bottom end of the pressure relief column 51, and the top of the pressure relief chamber 511 is communicated with the threaded hole 52, and a sphere 512 is provided at the inner bottom of the threaded hole 52. In this specific embodiment, a pressure relief hole 513 is provided on the side of the pressure relief column 51, and one end of the pressure relief hole 513 is communicated with one side of the threaded hole 52. When installing the shaft body 1, the shaft body 1 is sleeved in the kit and high-pressure oil is injected into the first cavity 6 through the oil filling column 41. At this time, the high-pressure oil will impact the ball 43 and compress the spring 44, and then reach the inside of the first cavity 6. When the high-pressure oil is injected, the shaft body 1 is displaced in the circumferential direction under the action of pressure, which can meet the size installation requirements. When it needs to be removed for inspection and maintenance, it is only necessary to rotate the threaded column 53 so that the threaded column 53 moves up inside the threaded hole 52. At this time, the pressure inside the second cavity 7 will be released along the second cavity 7 to the pressure relief chamber 511 and lift the ball 512. At this time, the pressure will enter the threaded hole 52 from the pressure relief chamber 511 and be released from the inside of the pressure relief hole 513, thereby causing the size of the shaft body 1 to be restored, thereby achieving the purpose of convenient disassembly and maintenance.

[0024] In this specific embodiment, the oil filling valve assembly 4 includes an oil filling column 41 arranged inside the first circular groove 2, and an even oil filling hole 42 is opened at the top of the oil filling column 41, and a blocking ball 43 larger than the aperture of the oil filling hole 42 is provided at the bottom, and a spring 44 is provided at the bottom of the blocking ball 43. The bottom of the oil filling column 41 is connected to the first cavity 6, and the first cavity 6 is a 360-degree annular cavity. The bottom of the pressure relief column 51 is connected to the second cavity 7, and the second cavity 7 is a 360-degree annular cavity.

[0025] The control method of the present invention is automatic control through a controller. The control circuit of the controller can be implemented by simple programming by technicians in this field. The provision of power is also common knowledge in this field. In addition, the present invention is mainly used to protect mechanical devices, so the control method and circuit connection are no longer explained in detail in the present invention.

[0026] It should be noted that, in this article, the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements that are inherent to such process, method, article or apparatus.

[0027] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A hydraulic shaft, comprising a shaft body (1), characterized in that: The top of the shaft body (1) is respectively provided with a first circular groove (2) and a second circular groove (3), and an oil filling valve assembly (4) is provided inside the first circular groove (2), while a pressure relief assembly (5) for relieving pressure in the cavity is provided inside the second circular groove (3); The pressure relief assembly (5) comprises a pressure relief column (51) arranged inside the second circular groove (3), a threaded hole (52) is provided at the top of the pressure relief column (51), a threaded column (53) is provided inside the threaded hole (52), and a push rod (54) is provided at the bottom end of the threaded column (53).

2. The hydraulic shaft according to claim 1, characterized in that: A pressure relief chamber (511) is provided inside the bottom end of the pressure relief column (51), the top end of the pressure relief chamber (511) is communicated with the threaded hole (52), and a sphere (512) is provided at the inner bottom of the threaded hole (52).

3. The hydraulic shaft according to claim 1, characterized in that: A pressure relief hole (513) is provided on the side of the pressure relief column (51), and one end of the pressure relief hole (513) is communicated with one side of the threaded hole (52).

4. The hydraulic shaft according to claim 1, characterized in that: The oil filling valve assembly (4) comprises an oil filling column (41) arranged inside the first circular groove (2), and an even oil filling hole (42) is opened at the top of the oil filling column (41), and a blocking ball (43) larger than the hole diameter of the oil filling hole (42) is arranged at the bottom of the oil filling hole (42), and a spring (44) is arranged at the bottom of the blocking ball (43).

5. The hydraulic shaft according to claim 4, characterized in that: The bottom of the oil injection column (41) is connected to a first cavity (6), and the first cavity (6) is a 360-degree annular cavity.

6. The hydraulic shaft according to claim 1, characterized in that: The bottom of the pressure relief column (51) is connected through a second cavity (7), and the second cavity (7) is a 360-degree annular cavity.

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