Pressure calibration device for shaft workpiece installation

Abstract

The utility model relates to a pressure calibration device for shaft workpiece installation, which comprises a workbench, a support, a hydraulic cylinder and a pressure detection device, the support is fixedly installed on the top of the workbench, the hydraulic cylinder is arranged in the middle of the bottom of the support, and a gap is arranged between the bottom end of the hydraulic cylinder and the top end of the workbench. A linear sliding rail air cylinder is arranged at the bottom of the pressure detection device, the linear sliding rail air cylinder is arranged at the top of the workbench, and the top end of the pressure detection device is attached to the bottom end of the hydraulic cylinder; the linear sliding rail air cylinder drives the pressure detection device to do linear reciprocating displacement on the workbench, the pressure detection device is moved to the position below the hydraulic cylinder for detection and calibration when the pressure detection device needs to be used, and the pressure detection device is moved to the corner of the workbench when the pressure detection device does not need to be used so that normal operation of equipment can be prevented from being affected by the pressure detection device. In this way, the pressure of the hydraulic cylinder can be calibrated, and the situation that the pressure of the hydraulic cylinder exceeds the rated pressure range due to long-time use is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of shaft parts processing, in particular to a pressure calibration device for installing shaft workpieces. Background Art

[0002] The mutual coordination and assembly of the bearing and the rotating shaft require the use of a hydraulic device. Because the rotating shaft and the bearing are generally interference fit, in order to avoid failure due to roughening of the mounting surface during assembly, it is necessary to control the pressure, and this problem can be further avoided by applying lubricating oil. With the increase in the industrialization process, the requirements for installation accuracy and installation quality are getting higher and higher, so a device for detecting the installation pressure is needed to periodically calibrate the pressing pressure to ensure the installation accuracy. Utility Model Content

[0003] The utility model aims to provide a pressure calibration device for installing shaft workpieces to solve the problems existing in the above-mentioned prior art.

[0004] The above technical objectives of the utility model are achieved through the following technical solutions:

[0005] A pressure calibration device for installing shaft workpieces, comprising a workbench, a bracket, a hydraulic cylinder and a pressure detection device, wherein the bracket is fixedly installed on the top of the workbench, the hydraulic cylinder is arranged in the middle position of the bottom of the bracket, and there is a gap between the bottom end of the hydraulic cylinder and the top end of the workbench, a linear slide cylinder is arranged at the bottom of the pressure detection device, and the linear slide cylinder is arranged on the top of the workbench, and the top of the pressure detection device is in contact with the bottom end of the hydraulic cylinder.

[0006] By adopting the above technical solution, the linear slide cylinder drives the pressure detection device to move back and forth linearly on the workbench. When it is needed, the pressure detection device is moved to the bottom of the hydraulic cylinder for detection and calibration. When it is not needed, the pressure detection device is moved to the corner of the workbench to prevent the pressure detection device from affecting the normal operation of the equipment. In this way, the pressure of the hydraulic cylinder can be calibrated to prevent the hydraulic cylinder pressure from exceeding the rated pressure range due to long-term use.

[0007] In a further embodiment, the pressure detection device includes a fixed plate, a nitrogen spring, a pressure plate, a position detector, a pressure sensor and a control device, the fixed plate is fixedly connected to the slider of the linear slide cylinder, the nitrogen spring is arranged at the top center of the fixed plate, the pressure plate is arranged at the top of the nitrogen spring, the position detector is arranged at the top of the fixed plate, the pressure sensor is arranged at the connection between the nitrogen spring and the pressure plate, the control device is arranged at the bottom of the fixed plate, and the control device is electrically connected to the nitrogen spring, the position detector and the pressure sensor through a data line.

[0008] By adopting the above technical solution, the pressure during the bearing installation process can be simulated through the cooperation between the nitrogen spring and the pressure plate, and then the pressure during the hydraulic cylinder pressing process can be compared through the detection data of the pressure sensor, and the hydraulic cylinder can be calibrated through the compared values.

[0009] In a further embodiment, the bracket includes a first vertical plate, a second vertical plate and a cross beam, the first vertical plate and the second vertical plate are symmetrically arranged on the workbench, one end of the cross beam is bolted and fixed to the top end of the first vertical plate, the other end of the cross beam is bolted and fixed to the top end of the second vertical plate, a plurality of hooks are arranged at equal intervals on the bottom of the cross beam, a pull rod is hingedly installed on each hook, and the end of the pull rod not connected to the hook is respectively screwed and fixed to the first vertical plate and the second vertical plate.

[0010] By adopting the above technical solution, the bending of the beam due to long-term stress can be avoided, the deformation time of the beam can be reduced, the working time of the hydraulic cylinder after each pressure calibration can be increased, and the operating efficiency of the equipment can be increased.

[0011] In a further embodiment, a force feedback module is provided on the hydraulic cylinder.

[0012] In a further embodiment, a timing cycle switch is provided on the linear slide cylinder, and the timing cycle switch is electrically connected to the control device through an electric wire.

[0013] In a further embodiment, a plurality of reinforcing ribs are provided at the bottom of the workbench.

[0014] In summary, the utility model has the following beneficial effects:

[0015] 1. The pressure detection device is driven by the linear slide cylinder to move linearly back and forth on the workbench. When it is needed, the pressure detection device is moved to the bottom of the hydraulic cylinder for detection and calibration. When it is not needed, the pressure detection device is moved to the corner of the workbench to avoid the pressure detection device affecting the normal operation of the equipment. In this way, the pressure of the hydraulic cylinder can be calibrated to avoid the effect that the pressure of the hydraulic cylinder exceeds the rated pressure range due to long-term use;

[0016] 2. The cooperation between the nitrogen spring and the pressure plate can simulate the pressure during the bearing installation process, and then the pressure during the hydraulic cylinder pressing process can be compared through the detection data of the pressure sensor. The hydraulic cylinder can be calibrated through the compared values. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 It is a schematic diagram of the connection relationship structure of the pressure detection device in the utility model.

[0019] In the figure, 1, workbench; 2, bracket; 21, first vertical plate; 22, second vertical plate; 23, crossbeam; 3, hydraulic cylinder; 4, pressure detection device; 41, fixed plate; 42, nitrogen spring; 43, pressure plate; 44, position detector; 45, pressure sensor; 46, control device; 5, linear slide cylinder. DETAILED DESCRIPTION

[0020] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0021] The same parts are denoted by the same reference numerals. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to the attached Figure 1 In the description of this specification, the words "bottom" and "top", "inside" and "outside" refer to directions toward or away from a particular component geometry, respectively. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of this specification, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0022] Embodiment 1:

[0023] like Figure 1-2As shown, a pressure calibration device for installing shaft workpieces includes a workbench 1, a bracket 2, a hydraulic cylinder 3 and a pressure detection device 4, the bracket 2 is fixedly installed on the top of the workbench 1, the hydraulic cylinder 3 is arranged in the middle position of the bottom of the bracket 2, and there is a gap between the bottom end of the hydraulic cylinder 3 and the top of the workbench 1, a linear slide cylinder 5 is arranged at the bottom of the pressure detection device 4, the linear slide cylinder 5 is arranged on the top of the workbench 1, the top of the pressure detection device 4 is in contact with the bottom end of the hydraulic cylinder 3, the pressure detection device 4 includes a fixed plate 41, a nitrogen spring 42, a pressure plate 43, a position detector 44, a pressure sensor 45 and a control device 46, the fixed plate 41 is fixedly connected to the slider of the linear slide cylinder 5, the nitrogen spring 42 is arranged at the top center of the fixed plate 41, and the pressure plate 43 is arranged at the top of the nitrogen spring 42 At the top, the position detector 44 is arranged on the top of the fixed plate 41, the pressure sensor 45 is arranged at the connection between the nitrogen spring 42 and the pressure plate 43, the control device 46 is arranged at the bottom of the fixed plate 41, and the control device 46 is electrically connected to the nitrogen spring 42, the position detector 44 and the pressure sensor 45 through a data line. The bracket 2 includes a first vertical plate 21, a second vertical plate 22 and a crossbeam 23. The first vertical plate 21 and the second vertical plate 22 are symmetrically arranged on the workbench 1. One end of the crossbeam 23 is bolted and fixed to the top of the first vertical plate 21, and the other end of the crossbeam 23 is bolted and fixed to the top of the second vertical plate 22. A plurality of hooks are arranged at equal intervals at the bottom of the crossbeam 23, and a pull rod is hingedly installed on each hook. The end of the pull rod not connected to the hook is screwed and fixed to the first vertical plate 21 and the second vertical plate 22 respectively.

[0024] like Figure 1-2 As shown, a force feedback module is provided on the hydraulic cylinder 3, a timing cycle switch is provided on the linear slide cylinder 5, the timing cycle switch is electrically connected to the control device 46 through wires, and a plurality of reinforcing ribs are provided at the bottom of the workbench 1.

[0025] Specific implementation process: The pressure during the bearing installation process can be simulated by the cooperation between the nitrogen spring and the pressure plate, and then the pressure during the hydraulic cylinder pressing process can be compared through the detection data of the pressure sensor. The hydraulic cylinder can be calibrated by the compared values. The pressure of the nitrogen spring increases with the increase of the effective stroke. During the bearing installation process, as the bearing sleeve position gets closer and closer to the installation position, the required pressing force is also getting larger and larger, because the contact area between the inner surface of the bearing and the surface of the rotating shaft increases before being installed to the specified position. The larger the contact area, the greater the friction, so the nitrogen spring can meet the simulated pressing state. state conditions, and nitrogen springs have strong controllability compared to ordinary springs, so nitrogen springs are used here to simulate the pressing process. After the pressure plate is pressed by the hydraulic cylinder with the set pressure, whether the pressure plate reaches the specified position, or whether the nitrogen spring reaches the specified effective stroke, it can be judged how much the pressure of the hydraulic cylinder needs to be calibrated. The difference in the hydraulic cylinder is related to many factors. The most important one is that with the increase in the number of uses, the aging of parts leads to pressure deviation. Another is that the installation position is deformed by force for a long time, resulting in inadequate pressing. Therefore, the pressure of the hydraulic cylinder needs to be calibrated to ensure high-precision installation of the bearing.

[0026] In the embodiments disclosed in the present invention, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; "connect" can be a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in the embodiments disclosed in the present invention can be understood according to specific circumstances.

[0027] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A pressure calibration device for installing a shaft workpiece, characterized in that: The invention comprises a workbench (1), a bracket (2), a hydraulic cylinder (3) and a pressure detection device (4), wherein the bracket (2) is fixedly mounted on the top of the workbench (1), the hydraulic cylinder (3) is arranged at the middle position of the bottom of the bracket (2), and there is a gap between the bottom end of the hydraulic cylinder (3) and the top end of the workbench (1), and a linear slide cylinder (5) is arranged at the bottom of the pressure detection device (4), and the linear slide cylinder (5) is arranged on the top of the workbench (1), and the top end of the pressure detection device (4) is in contact with the bottom end of the hydraulic cylinder (3).

2. A pressure calibration device for installing a shaft workpiece according to claim 1, characterized in that: The pressure detection device (4) comprises a fixed plate (41), a nitrogen spring (42), a pressure plate (43), a position detector (44), a pressure sensor (45) and a control device (46); the fixed plate (41) is fixedly connected to the slider of the linear slide cylinder (5); the nitrogen spring (42) is arranged at the top center of the fixed plate (41); the pressure plate (43) is arranged at the top of the nitrogen spring (42); the position detector (44) is arranged at the top of the fixed plate (41); the pressure sensor (45) is arranged at the connection between the nitrogen spring (42) and the pressure plate (43); the control device (46) is arranged at the bottom of the fixed plate (41); and the control device (46) is electrically connected to the nitrogen spring (42), the position detector (44) and the pressure sensor (45) through a data line.

3. A pressure calibration device for installing a shaft workpiece according to claim 1, characterized in that: The bracket (2) comprises a first vertical plate (21), a second vertical plate (22) and a crossbeam (23), wherein the first vertical plate (21) and the second vertical plate (22) are symmetrically arranged on the workbench (1), one end of the crossbeam (23) is bolted and fixed to the top end of the first vertical plate (21), and the other end of the crossbeam (23) is bolted and fixed to the top end of the second vertical plate (22), and a plurality of hooks are arranged at equal intervals at the bottom of the crossbeam (23), and a pull rod is hingedly installed on each of the hooks, and the end of the pull rod not connected to the hook is bolted and fixed to the first vertical plate (21) and the second vertical plate (22) respectively.

4. A pressure calibration device for installing a shaft workpiece according to claim 1, characterized in that: The hydraulic cylinder (3) is provided with a force feedback module.

5. The pressure calibration device for installing a shaft workpiece according to claim 2, characterized in that: The linear slide cylinder (5) is provided with a timing cycle switch, and the timing cycle switch is electrically connected to the control device (46) via an electric wire.

6. The pressure calibration device for installing a shaft workpiece according to claim 1, characterized in that: The bottom of the workbench (1) is provided with a plurality of reinforcing ribs.

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