One-way diaphragm oil cylinder capable of adjusting length of loading rod

Abstract

A one-way diaphragm oil cylinder capable of adjusting the length of a loading rod relates to the technical field of bearing test equipment and comprises an oil cylinder barrel and an oil cylinder piston installed in an inner hole of the oil cylinder barrel, the oil cylinder piston is provided with an inner threaded hole, the loading rod is installed on the side, away from the oil inlet end of the oil cylinder, of the inner threaded hole, and the loading rod is connected with the oil cylinder. A jacking assembly is installed in a hole in the other side and used for pressing the end of the loading rod, a diaphragm and an oil cylinder cover are sequentially installed on the side, close to the jacking assembly, of the oil cylinder piston and fixed to the oil cylinder barrel through a locking piece, hydraulic oil enters a closed cavity between the diaphragm and the oil cylinder cover through an oil port, and the hydraulic oil enters the closed cavity through the oil port. The oil pressure enables the diaphragm to deform and then transmits the pressure to the oil cylinder piston. According to the scheme, the one-way diaphragm oil cylinder can be installed in place at a time, unnecessary assembly and disassembly are avoided, the installation precision is guaranteed, the service life of the diaphragm is prolonged, and meanwhile the influence of equipment vibration on the oil cylinder loading precision at the high rotating speed is reduced.

Description

Technical Field

[0001] This utility model relates to the technical field of bearing testing equipment, specifically a one-way diaphragm cylinder with adjustable loading rod length. Background Technology

[0002] It is known that high-speed, low-load bearing tests generally require high loading accuracy, loading stability, and loading response speed. The test loading is often achieved using a one-way diaphragm cylinder. However, the piston stroke of a one-way diaphragm cylinder is approximately zero, thus requiring high precision in cylinder installation. Based on current one-way diaphragm cylinder structures, the cylinder is typically assembled first, then installed onto the testing equipment to determine if the piston stroke is appropriate. If not, the entire cylinder needs to be disassembled to measure and adjust the length of the loading rod at the piston end, thus adjusting the piston stroke. If the measurement is inaccurate, the cylinder needs to be disassembled multiple times, resulting in low efficiency, and the installation accuracy depends entirely on the installer. Improper installation can lead to an excessively large or small loading stroke. During use, the high-pressure oil will repeatedly squeeze the diaphragm, causing premature diaphragm damage. Utility Model Content

[0003] To solve the above-mentioned technical problems, the purpose of this utility model is to propose a one-way diaphragm cylinder with an adjustable loading rod length.

[0004] The technical solution adopted by this utility model is: a one-way diaphragm cylinder with adjustable loading rod length, including a cylinder barrel and a cylinder piston installed in the inner hole of the cylinder barrel. The cylinder piston has an internal threaded hole. A loading rod is installed on the side of the internal threaded hole away from the oil inlet end of the cylinder. A clamping component is installed in the hole on the other side to press the end of the loading rod. A diaphragm and a cylinder cover are installed in sequence on the side of the cylinder piston near the clamping component. The diaphragm and the cylinder cover are fixed on the cylinder barrel by a locking component. Hydraulic oil enters the sealed cavity between the diaphragm and the cylinder cover through the oil port. The oil pressure deforms the diaphragm and transmits the pressure to the cylinder piston.

[0005] As a preferred embodiment, the clamping assembly includes at least one set screw and a retaining plug. One end of the set screw is screwed into the threaded hole at the end of the loading rod and presses the loading rod. The retaining plug is installed in the inner hole of the piston of the cylinder on the side where the set screw is installed and is used to seal it.

[0006] As a preferred embodiment, the end face of the fixed plug is flush with the end face of the cylinder piston.

[0007] As a preferred embodiment, the set screw is an internal hexagon set screw.

[0008] As a preferred embodiment, the outer circumference of the cylinder head is further provided with an exhaust port that communicates with the sealed cavity, and an exhaust valve is installed at the exhaust port.

[0009] As a preferred embodiment, an oil discharge rod is installed at the outer port of the exhaust valve, and the oil discharge rod is connected to a hydraulic oil recovery pipeline.

[0010] As a preferred embodiment, the outer wall of the cylinder near the loading rod is also provided with a connecting lug plate with mounting holes.

[0011] The beneficial effects of this utility model are:

[0012] Based on the shortcomings of existing technologies, this solution provides a one-way diaphragm cylinder. Through optimized structural design, an internal threaded hole is machined into the cylinder piston. A loading rod is installed on the side of the internal threaded hole away from the oil inlet end of the cylinder, and a clamping component is installed in the hole on the other side to press the end of the loading rod. Through the above structural design, a one-way diaphragm cylinder with an adjustable loading rod length is obtained. This structure allows the one-way diaphragm cylinder to be installed in place in one go, avoiding unnecessary installation and disassembly, ensuring installation accuracy, extending the service life of the diaphragm, and reducing the impact of equipment vibration at high speeds on the loading accuracy of the cylinder.

[0013] Furthermore, the clamping assembly includes at least one set screw and a retaining plug. One end of the set screw is screwed into the threaded hole at the end of the loading rod and presses the loading rod. The retaining plug is inserted into the inner hole of the cylinder piston on the side where the set screw is installed to seal it, thereby preventing the diaphragm from experiencing stress concentration at the inner hole of the cylinder piston under the action of oil pressure and premature damage. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of one embodiment of the present invention.

[0016] Reference numerals in the attached drawings: 1. Cylinder head, 2. Diaphragm, 3. Fixing plug, 4. Socket headstock set screw I, 5. Cylinder piston, 6. Socket headstock set screw II, 7. Cylinder barrel, 8. Loading rod, 9. Oil discharge rod, 10. Exhaust valve. Detailed Implementation

[0017] The present invention will now be described in detail through exemplary embodiments. However, it should be understood that, without further description, elements, structures, and features in one embodiment may be advantageously incorporated into other embodiments.

[0018] It should be noted that, unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this utility model pertains; the words "a," "an," or "the" and similar terms used in the specification and claims of this utility model patent application do not express a quantity limitation, but rather indicate the presence of at least one; the words "comprising" or "including" and similar terms indicate that the elements or objects preceding "comprising" or "including" cover the elements or objects listed following "comprising" or "including" and their equivalents, but do not exclude other elements or objects having the same function;

[0019] To more clearly describe the specific structural components and installation process of this adjustable loading rod length unidirectional diaphragm cylinder, in conjunction with the attached... Figure 1 This embodiment is described in detail:

[0020] like Figure 1 As shown, a one-way diaphragm cylinder with an adjustable loading rod length mainly consists of a cylinder cover 1, a diaphragm 2, a cylinder piston 5, a cylinder barrel 7, a loading rod 8, and a clamping assembly. The cylinder piston 5 is installed in the inner hole of the cylinder barrel 7 and can move along the axis of the cylinder barrel 7. The clamping assembly consists of a fixing plug 3, a hexagonal set screw I 4, and a hexagonal set screw II 6. The inner hole of the cylinder piston 5 is a threaded hole, and as can be seen from the figure, this threaded hole is far from the oil inlet. Screw the loading rod 8 into one side of A, and screw the socket head cap set screw II6 into the other side. After ensuring that the socket head cap set screw II6 presses the loading rod 8, screw in the socket head cap set screw I4 and press the socket head cap set screw II6. Then, install the retaining plug 3. On the side with the retaining plug 3, install the diaphragm 2 and the cylinder cover 1 in sequence, and fix the diaphragm 2 and the cylinder cover 1 to the end face of the cylinder barrel 7 with screws. In this way, a sealed cavity will be formed between the cylinder cover 1 and the diaphragm 2.

[0021] like Figure 1 As shown in the figure, port A is the inlet for loading hydraulic oil. The gas carried in the hydraulic oil can be discharged through the exhaust valve 10. The excess hydraulic oil carried out by the exhaust valve 10 can be recovered through the external pipeline on the oil drain rod 9. The hydraulic oil flows into the sealed cavity between the cylinder head 1 and the diaphragm 2 and generates a certain oil pressure on the diaphragm 2. After the diaphragm 2 deforms, it transmits the hydraulic oil pressure to the cylinder piston 5, thereby forming a loading force.

[0022] It should be noted that: In this embodiment, the clamping assembly is equipped with two set screws, namely hexagonal set screw I4 and hexagonal set screw II6. Hexagonal set screw II6 is used to clamp the loading rod 8, and hexagonal set screw I4 is used to clamp hexagonal set screw II6 and prevent it from loosening. Then, the fixing plug 5 is inserted into the inner hole of the set screw mounting side of the hydraulic cylinder piston 5 for sealing, so that after installation, the outer end face of the fixing plug 3 is flush with the end face of the hydraulic cylinder piston 5, thereby avoiding stress concentration of the diaphragm 2 at the inner hole of the hydraulic cylinder piston 5 under the action of oil pressure, and premature damage.

[0023] In this embodiment, the outer circumference of the cylinder cover 1 is also provided with an exhaust port that connects to the sealed cavity, and an exhaust valve 10 is installed at the exhaust port; an oil discharge rod 9 is installed at the outer port of the exhaust valve 10, and the oil discharge rod 9 is used to connect to an external hydraulic oil recovery pipeline.

[0024] In this embodiment, a connecting lug with mounting holes is also provided on the outer wall of the cylinder 7 near the loading rod 8 to facilitate fixing the cylinder as a whole to the equipment.

[0025] The installation steps for a one-way diaphragm cylinder with an adjustable loading rod length are as follows:

[0026] First, screw the threaded end of the loading rod into the cylinder piston. After installation, measure the length of the loading rod extending out of the cylinder piston, ensuring it is as close as possible to the design value. Then, install the cylinder piston into the cylinder barrel, and then install the cylinder barrel and piston together to the position of the equipment's loading device. After installation, observe whether the end faces of the cylinder piston and cylinder barrel on the same side are flush. If not, use a tool to adjust the loading rod directly from the inner hole of the cylinder piston until the end faces of the cylinder piston and cylinder barrel on the same side are flush. Use a tool to check and ensure that both end faces are flush. Then, screw the hexagon set screw II into the cylinder piston until it presses the loading rod firmly. Then, screw the hexagon set screw I into the cylinder piston to press the hexagon set screw II firmly. This will ensure that the stroke of the cylinder piston is essentially zero. Finally, insert a plug into the upper end of the inner hole of the cylinder piston and use screws to fix the diaphragm and cylinder cover onto the cylinder barrel. This structure allows for the one-time installation of the unidirectional diaphragm cylinder, avoiding unnecessary assembly and disassembly, ensuring installation accuracy, extending the diaphragm's service life, and reducing the impact of equipment vibration on the cylinder's loading accuracy at high speeds.

[0027] The parts not described in detail in the above embodiments are existing technologies.

[0028] It should be noted that although the above embodiments describe a one-way diaphragm cylinder structure with an adjustable loading rod length, the present invention can have many other embodiments. Without departing from the spirit and scope of the present invention, those skilled in the art can obviously make various corresponding changes and modifications to the present invention, but these changes and modifications should all fall within the scope of protection of the appended claims and their equivalents.

Claims

1. A one-way diaphragm cylinder with an adjustable loading rod length, comprising a cylinder barrel and a cylinder piston installed in the inner bore of the cylinder barrel, characterized in that: The cylinder piston has an internal threaded hole. A loading rod is installed on the side of the internal threaded hole away from the oil inlet end of the cylinder, and a clamping assembly is installed in the hole on the other side to clamp the end of the loading rod. A diaphragm and a cylinder cover are installed in sequence on the side of the cylinder piston near the clamping assembly. The diaphragm and the cylinder cover are fixed to the cylinder barrel by a locking member. Hydraulic oil enters the sealed cavity between the diaphragm and the cylinder cover through the oil port. The oil pressure deforms the diaphragm and transmits the pressure to the cylinder piston.

2. The one-way diaphragm cylinder with adjustable loading rod length according to claim 1, characterized in that: The clamping assembly includes at least one set screw and a retaining plug. One end of the set screw is screwed into the threaded hole at the end of the loading rod and presses the loading rod. The retaining plug is installed in the inner hole of the piston of the cylinder on the side where the set screw is installed and is used to seal it.

3. A one-way diaphragm cylinder with adjustable loading rod length according to claim 2, characterized in that: The end face of the fixed plug is flush with the end face of the cylinder piston.

4. A one-way diaphragm cylinder with adjustable loading rod length according to claim 2, characterized in that: The set screw is an internal hexagon set screw.

5. A one-way diaphragm cylinder with adjustable loading rod length according to claim 1, characterized in that: The cylinder cover is also provided with an exhaust port that connects to the sealed cavity on its outer circumference, and an exhaust valve is installed at the exhaust port.

6. A one-way diaphragm cylinder with adjustable loading rod length according to claim 5, characterized in that: An oil discharge rod is installed at the outer port of the exhaust valve, and the oil discharge rod is connected to a hydraulic oil recovery pipeline.

7. A one-way diaphragm cylinder with adjustable loading rod length according to claim 1, characterized in that: The cylinder barrel is also provided with a connecting lug plate with mounting holes on the outer wall of the end near the loading rod.

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