Device for improving stability of actuator of fatigue testing machine

Abstract

The utility model discloses a device for improving the stability of an actuator of a fatigue testing machine, which belongs to the technical field of actuators and is characterized in that a fatigue testing machine cross beam is fixedly mounted on the surface of a copper sleeve, an actuator body is fixedly mounted at the upper part of the fatigue testing machine cross beam and is provided with an actuator piston; according to the device for improving the stability of the actuator of the fatigue testing machine, a groove for lubricating the copper sleeve and a lubricating oil injection groove are formed in the copper sleeve, so that lubricating grease can be injected into the copper sleeve, the stability of the actuator is improved, the stability of the actuator is improved, and the service life of the actuator is prolonged. The friction force between the copper sleeve and the actuator piston can be greatly reduced, the equipment performance is improved, lubricating oil can be added regularly through the two lubricating oil injection holes and the lubricating oil pump set connected with the two lubricating oil injection holes, an oil film is attached to the surface of the piston all the time, and the continuity of lubrication is kept.

Description

Technical Field

[0001] The utility model relates to the technical field of actuators, and more particularly to a device for improving the stability of an actuator of a fatigue testing machine. Background Art

[0002] Fatigue testing machine is a machine mainly used to test the fatigue properties of metals and their alloy materials under tension, compression or tension-compression alternating loads at room temperature.

[0003] Common fatigue testing machine mainframe structures are divided into two types: combined frame type and single column type. The price difference between the two is quite large. Considering the cost, users generally choose the lower-priced column type. The actuator of the column-type fatigue testing machine is generally installed on the upper part of the moving beam. The piston of the actuator must pass through the beam and then connect to the test sample. This causes the piston to extend longer. Manufacturers generally add a guide copper sleeve at the bottom of the beam to protect the piston. A wear-resistant ring is installed inside the copper sleeve to protect the outer surface of the piston. In actual use, the added copper sleeve and wear-resistant ring will increase the friction of the piston during operation, affecting the performance of the equipment. To this end, we have designed a device to improve the stability of the fatigue testing machine actuator to solve the above problem. Utility Model Content

[0004] In response to the problems existing in the prior art, the purpose of the present utility model is to provide a device for improving the stability of the actuator of a fatigue testing machine. The device for improving the stability of the actuator of a fatigue testing machine can inject lubricating grease into the inside of the copper sleeve through lubrication grooves and lubricating oil injection grooves provided on the copper sleeve, which can greatly reduce the friction between the copper sleeve and the actuator piston and improve the performance of the equipment. In addition, through the two lubricating oil injection holes and the lubricating oil pump group connected to the two lubricating oil injection holes, lubricating oil can be added at regular intervals to keep the piston surface covered with an oil film and maintain continuous lubrication.

[0005] In order to solve the above problems, the present invention adopts the following technical solutions.

[0006] The cam is fixedly mounted on the upper portion of the crossbeam of the fatigue testing machine, wherein the cam is fixedly mounted on the upper portion of the crossbeam of the fatigue testing machine, the cam is fixedly mounted on the upper portion of the crossbeam of the fatigue testing machine, the cam is provided with an actuator piston, the surface of the actuator piston is slidably connected to the inner wall of the copper sleeve, one end of the copper sleeve is fixedly mounted with an upper dust ring mounting plate, the inner wall of the upper dust ring mounting plate is clamped with an upper dust ring, the other end of the copper sleeve is fixedly mounted with a copper sleeve fixing plate, a sleeve hole is provided at the center position of the copper sleeve, and the inner wall of the sleeve hole is provided with a copper sleeve upper lubrication groove and a lubricating oil injection groove, one end of the copper sleeve is provided with a lubricating oil injection hole, one end of the lubricating oil injection hole is connected to the lubricating oil injection groove, and a lower dust ring is clamped with the inner wall of the copper sleeve. The device for improving the stability of the actuator of the fatigue testing machine can inject lubricating grease into the copper sleeve through the copper sleeve upper lubrication groove and the lubricating oil injection groove provided inside the copper sleeve. The friction between the copper sleeve and the actuator piston can be greatly reduced, and the performance of the equipment can be improved. In addition, through the two lubricating oil injection holes and the lubricating oil pump group connected to the two lubricating oil injection holes, lubricating oil can be added regularly to keep the oil film on the piston surface and maintain continuous lubrication.

[0007] Furthermore, a slot is provided on the inner wall of the upper dust ring mounting plate, the cross-sectional shape of the slot is semicircular, the inner wall of the slot contacts and squeezes the surface of the upper dust ring, and the inner wall of the upper dust ring is slidingly connected to the surface of the actuator piston. The upper dust ring can seal the upper end connection gap of the copper sleeve to prevent dust from entering the interior of the copper sleeve.

[0008] Furthermore, a limiting groove is provided on the inner wall of the central sleeve hole of the copper sleeve, and the cross-sectional shape of the limiting groove is semicircular. The inner wall of the limiting groove contacts and squeezes the surface of the lower dust ring, and the inner wall of the lower dust ring is slidingly connected to the surface of the actuator piston. The lower dust ring is used to seal the lower end connection gap of the copper sleeve to prevent dust from entering the interior of the copper sleeve.

[0009] Furthermore, there are two lubricating oil injection holes, which are distributed radially symmetrically. A lubricating oil delivery pipe is provided at one end of the lubricating oil injection hole, and a lubricating oil pump group is connected to one end of the lubricating oil delivery pipe, so that lubricating oil can be added regularly through the lubricating oil pump group.

[0010] Furthermore, a connecting hole is provided at the center of the copper sleeve fixing plate, an inner wall of the connecting hole is provided with an internal thread, a connecting end is provided at one end of the copper sleeve, and an external thread is provided on the surface of the connecting end.

[0011] Furthermore, the upper dust ring and the lower dust ring are both in the shape of annular rings, and the cross-sectional shapes of the upper dust ring and the lower dust ring are both circular.

[0012] Furthermore, the outer contour of the copper sleeve fixing plate is a polygon, which facilitates the rotation of the copper sleeve fixing plate by a wrench.

[0013] Compared with the prior art, the advantages of the present invention are:

[0014] This solution can inject lubricating grease into the copper sleeve by providing lubricating grooves and lubricating oil injection grooves on the copper sleeve, which can greatly reduce the friction between the copper sleeve and the actuator piston and improve equipment performance.

[0015] This solution provides two lubricating oil injection holes and a lubricating oil pump group connected to the two lubricating oil injection holes, which can add lubricating oil at regular intervals, so that the piston surface is always covered with an oil film to maintain continuous lubrication. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional diagram of the overall structure of the utility model;

[0017] Figure 2 This is a cross-sectional view of the copper sleeve structure of the utility model;

[0018] Figure 3 This is a three-dimensional diagram of the upper dust ring mounting plate structure of the present utility model;

[0019] Figure 4 This is a schematic diagram of the installation structure of the actuator body and the fatigue testing machine beam;

[0020] Figure 5 for Figure 4 Structural cross-sectional view.

[0021] Description of the numbers in the figure:

[0022] 1 Actuator piston, 2 Fatigue testing machine crossbeam, 3 Copper sleeve, 4 Upper dust ring, 5 Upper dust ring mounting plate, 6 Copper sleeve upper lubrication groove, 7 Lubricating oil injection groove, 8 Lubricating oil injection hole, 9 Lower dust ring, 10 Copper sleeve fixing plate, 11 Actuator body. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention. Example

[0024] See also Figure 1-5, a device for improving the stability of a fatigue testing machine actuator, comprising an actuator body 11 and a copper sleeve 3, the actuator body 11 belongs to the prior art, a fatigue testing machine crossbeam 2 is fixedly mounted on the surface of the copper sleeve 3, the fatigue testing machine crossbeam 2 is connected to the fatigue testing machine body, its composition structure and working principle are well known to those skilled in the art, and will not be described in detail here, the actuator body 11 is fixedly mounted on the upper part of the fatigue testing machine crossbeam 2, the actuator body 11 is provided with an actuator piston 1, the surface of the actuator piston 1 is slidably connected to the inner wall of the copper sleeve 3, one end of the copper sleeve 3 is fixedly mounted with an upper dust ring mounting plate 5, the upper dust ring The inner wall of the dust ring mounting plate 5 is clamped with the upper dust ring 4. The upper dust ring 4 and the lower dust ring 9 are both annular in shape, and the cross-sectional shapes of the upper dust ring 4 and the lower dust ring 9 are both circular. The other end of the copper sleeve 3 is fixedly mounted with a copper sleeve fixing plate 10. The outer contour of the copper sleeve fixing plate 10 is polygonal, which is convenient for rotating the copper sleeve fixing plate 10 with a wrench. A sleeve hole is provided at the center of the copper sleeve 3, and the inner wall of the sleeve hole is provided with a copper sleeve upper lubrication groove 6 and a lubricating oil injection groove 7. A lubricating oil injection hole 8 is provided at one end of the copper sleeve 3, and one end of the lubricating oil injection hole 8 is connected to the lubricating oil injection groove 7. The lower dust ring 9 is clamped with the inner wall of the copper sleeve 3.

[0025] The inner wall of the upper dust ring mounting plate 5 is provided with a card groove, the cross-sectional shape of the card groove is semicircular, the inner wall of the card groove is in contact and extrusion with the surface of the upper dust ring 4, the inner wall of the upper dust ring 4 is slidingly connected to the surface of the actuator piston 1, and the upper dust ring 4 can seal the upper end connection gap of the copper sleeve 3 to prevent dust from entering the interior of the copper sleeve 3. A limiting groove is provided on the inner wall of the center sleeve hole of the copper sleeve 3, the cross-sectional shape of the limiting groove is semicircular, the inner wall of the limiting groove is in contact and extrusion with the surface of the lower dust ring 9, the inner wall of the lower dust ring 9 is slidingly connected to the surface of the actuator piston 1, and the lower dust ring 9 is used to seal the lower end connection gap of the copper sleeve 3 to prevent dust from entering the interior of the copper sleeve 3.

[0026] There are two lubricating oil injection holes 8, which are distributed radially symmetrically. A lubricating oil delivery pipe is provided at one end of the lubricating oil injection hole 8, and one end of the lubricating oil delivery pipe is connected to a lubricating oil pump group, through which lubricating oil can be added regularly. A connecting hole is provided at the center position of the copper sleeve fixing plate 10, and the inner wall of the connecting hole is provided with an internal thread. A connecting end is provided at one end of the copper sleeve 3, and the surface of the connecting end is provided with an external thread.

[0027] When the device for improving the stability of the fatigue testing machine actuator is in use, lubricating oil can be delivered regularly through the lubricating oil pump group. The lubricating oil enters the lubricating oil injection groove 7 through the lubricating oil injection hole 8 and then enters the lubricating groove 6 on the copper sleeve through the gap. When the actuator piston 1 moves, an oil film is formed on the surface of the actuator piston 1 to reduce friction and ensure its working stability. Lubricating grease can be injected into the copper sleeve 3 through the lubricating groove 6 and the lubricating oil injection groove 7 on the copper sleeve set inside the copper sleeve 3, which can greatly reduce the friction between the copper sleeve 3 and the actuator piston 1 and improve equipment performance. In addition, through the two lubricating oil injection holes 8 and the lubricating oil pump group connected to the two lubricating oil injection holes 8, lubricating oil can be added regularly to keep the piston surface always attached to the oil film and maintain the continuity of lubrication.

[0028] The above description is merely a preferred embodiment of the present invention; however, the scope of protection of the present invention is not limited thereto. Any person skilled in the art who, within the technical scope disclosed in the present invention, makes equivalent substitutions or modifications based on the technical solutions and improved concepts of the present invention shall be covered by the scope of protection of the present invention.

Claims

1. A device for improving the stability of a fatigue testing machine actuator, comprising an actuator body (11) and a copper sleeve (3), wherein a fatigue testing machine crossbeam (2) is fixedly mounted on the surface of the copper sleeve (3), and the actuator body (11) is fixedly mounted on the upper portion of the fatigue testing machine crossbeam (2), characterized in that: The actuator body (11) is provided with an actuator piston (1), the surface of the actuator piston (1) is slidably connected to the inner wall of the copper sleeve (3), one end of the copper sleeve (3) is fixedly mounted with an upper dust ring mounting plate (5), the inner wall of the upper dust ring mounting plate (5) is clamped with an upper dust ring (4), the other end of the copper sleeve (3) is fixedly mounted with a copper sleeve fixing plate (10), a sleeve hole is provided at the center of the copper sleeve (3), and the inner wall of the sleeve hole is provided with a copper sleeve upper lubrication groove (6) and a lubricating oil injection groove (7), one end of the copper sleeve (3) is provided with a lubricating oil injection hole (8), one end of the lubricating oil injection hole (8) is connected to the lubricating oil injection groove (7), and the inner wall of the copper sleeve (3) is clamped with a lower dust ring (9).

2. The device for improving the stability of an actuator of a fatigue testing machine according to claim 1, characterized in that: The inner wall of the upper dust ring mounting plate (5) is provided with a slot, the cross-sectional shape of the slot is semicircular, the inner wall of the slot contacts and squeezes the surface of the upper dust ring (4), and the inner wall of the upper dust ring (4) is slidably connected to the surface of the actuator piston (1).

3. The device for improving the stability of an actuator of a fatigue testing machine according to claim 1, characterized in that: A limiting groove is provided on the inner wall of the central sleeve hole of the copper sleeve (3), and the cross-sectional shape of the limiting groove is semicircular. The inner wall of the limiting groove contacts and squeezes the surface of the lower dust ring (9), and the inner wall of the lower dust ring (9) is slidably connected to the surface of the actuator piston (1).

4. The device for improving the stability of an actuator of a fatigue testing machine according to claim 1, characterized in that: The number of the lubricating oil injection holes (8) is two and they are distributed in radial symmetry. A lubricating oil delivery pipe is provided at one end of the lubricating oil injection hole (8), and one end of the lubricating oil delivery pipe is connected to a lubricating oil pump group.

5. The device for improving the stability of an actuator of a fatigue testing machine according to claim 1, characterized in that: A connection hole is provided at the center of the copper sleeve fixing plate (10), an inner wall of the connection hole is provided with an internal thread, and one end of the copper sleeve (3) is provided with a connection end, and a surface of the connection end is provided with an external thread.

6. The device for improving the stability of an actuator of a fatigue testing machine according to claim 1, characterized in that: The upper dustproof ring (4) and the lower dustproof ring (9) are both annular in shape, and the cross-sectional shapes of the upper dustproof ring (4) and the lower dustproof ring (9) are both circular.

7. The device for improving the stability of an actuator of a fatigue testing machine according to claim 1, characterized in that: The outer contour of the copper sleeve fixing plate (10) is a polygon.

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