Device for automatically tightening cylinder head and standby tightening nut of hydraulic oil cylinder

Abstract

The utility model discloses a device for automatically tightening a cylinder head and a standby tightening nut of a hydraulic oil cylinder, and belongs to the technical field of hydraulic machine assembly. The device mainly comprises a mechanical arm grabbing device, a tightening device and a fixing tool, the mechanical arm grabbing device clamps a piston rod through a grabbing clamp installed at the end to be installed on the fixing tool, and the mechanical arm grabbing device clamps a cylinder head or a nut to be tightened through the grabbing clamp installed at the end to be installed on the tightening device. The tightening device comprises a tightening tool and a moving device for driving the tightening tool; the piston rod is grabbed and moved through the grabbing clamp installed on the manipulator grabbing device and installed on the fixing tool capable of fixing the piston rod, and the fixed piston rod is assembled through the tightening tool and the moving device, so that the manual assembly process is replaced, the assembly quality is improved, the production efficiency is remarkably improved, and the production cost is reduced. And unmanned assembly is completely realized, the dependence on high-skill operators is reduced, and the labor cost is reduced.

Description

Technical Field

[0001] This application relates to the technical field of hydraulic machinery assembly, and specifically relates to a device for automatically tightening the cylinder head and backup nut of a hydraulic cylinder. Background Technique

[0002] Hydraulic machinery assembly refers to assembling and installing each component of a hydraulic system to construct a complete hydraulic machinery equipment. During the assembly process of hydraulic machinery, each component needs to be gradually assembled together according to the design drawings and instructions, and necessary calibration and testing are carried out to ensure the normal operation of the machinery equipment and its performance meets the requirements.

[0003] As Figure 1 shown, for some hydraulic cylinders, the cylinder head 7 and the piston rod 5 are connected by threads, and a backup nut 6 is used to prevent loosening. The function of this hydraulic cylinder head 7 is to extend the length of the piston rod 5 and install a steel-backed bearing, and at the same time, it has the characteristic that the length of the piston rod 5 can be adjusted.

[0004] However, traditionally, the installation of the cylinder head 7, the piston rod 5, and the backup nut 6 is completed manually. This method has disadvantages such as low efficiency, unstable assembly quality, and high labor costs.

[0005] Therefore, it is necessary to provide a device for automatically tightening the cylinder head and backup nut of a hydraulic cylinder to solve the above problems.

[0006] It should be noted that the above information disclosed in this background technical part is only used to understand the background technology of the concept of this application, and therefore, it may include information that does not constitute the prior art. Utility Model Content

[0007] Based on the above problems existing in the prior art, the problem to be solved by this application is: to provide a device for automatically tightening the cylinder head and backup nut of a hydraulic cylinder to solve the manual assembly problems of the cylinder head, piston rod, and backup nut of the hydraulic cylinder.

[0008] The technical solution adopted by this application to solve its technical problems is:

[0009] A device for automatically tightening the cylinder head and backup nut of a hydraulic cylinder includes a manipulator grasping device for grasping the piston rod and a tightening device for tightening the cylinder head and backup nut;

[0010] A fixed tooling, the manipulator grasping device is installed on the fixed tooling by clamping the piston rod with a grasping fixture installed at the end, and the manipulator grasping device clamps the cylinder head or the backup nut respectively with a grasping fixture installed at the end and installs them on the tightening device. The tightening device includes a tightening tooling and a moving device for driving the tightening tooling; the tightening tooling is installed on the movable end of the moving device;

[0011] The tightening tooling includes an installation sleeve for loading the cylinder head or the backup nut. A magnet for sucking the backup nut is installed in a circular hole on the side wall of the installation sleeve. A keyway for clamping the cylinder head is provided on one side of the installation sleeve. Both sides of the surface at the end of the cylinder head are flat key parts, and the cylinder head is clamped inside the keyway through the flat key parts;

[0012] The side wall of the installation sleeve is fixedly installed on the output shaft of an electric or pneumatic tightening tool. The electric or pneumatic tightening tool is fixedly installed on the installation frame through screws, and the installation frame is fixedly installed on the movable end of the moving device through screws.

[0013] Preferably, the moving device includes a tightening manipulator device, and the installation frame is fixedly installed on the end of the tightening manipulator device through screws.

[0014] Preferably, the moving device includes a lead screw module, and the moving table of the lead screw module is fixedly installed with the installation frame through screws.

[0015] Preferably, the fixing tooling includes V-shaped blocks. There are two V-shaped blocks, and the two V-shaped blocks are respectively fixedly installed on the top surface of the workbench. V-shaped grooves for placing the piston rod are provided on the top surfaces of the two V-shaped blocks.

[0016] Preferably, a pneumatic clamping device for clamping the piston rod is provided at the supporting part on one side of one of the V-shaped blocks. The pneumatic clamping device is installed on the top surface of the workbench, and the pneumatic clamping device clamps on the piston rod spacer installation surface;

[0017] A clamping plate is installed on the side wall of the other V-shaped block. A clamping groove is provided on the side wall of the clamping plate at the position of the V-shaped groove, and the flat surface of the piston rod is stuck in the clamping groove.

[0018] Preferably, a sensor is installed on the side wall of the V-shaped block provided with the clamping plate.

[0019] Preferably, the end of the manipulator grasping device is fixedly installed with a grasping fixture through screws. A clamping part for fixing the piston rod is fixedly installed on the side wall of the clamping jaw of the grasping fixture, and the clamping part clamps and fixes the flat surface of the piston rod.

[0020] The beneficial effects of this application are:

[0021] The gripper fixture installed on the robotic arm gripper device grabs and moves the piston rod, and installs it on the fixing tooling that can fix the piston rod. Then, the moving device cooperates with the robotic arm gripper device to equip the tightening nut and cylinder head on the installation sleeve, and the tightening tooling and the moving device are used to assemble the fixed piston rod, thus replacing the manual assembly process, improving the assembly quality, significantly enhancing the production efficiency, fully realizing unmanned assembly, reducing the dependence on highly skilled operators, and lowering the labor cost.

[0022] Moreover, it can provide an innovative automatic assembly solution for the manufacturing industry of hydraulic cylinders, with significant economic benefits and practical application value.

[0023] In addition to the purposes, features and advantages described above, this application has other purposes, features and advantages. The following will refer to the drawings to further elaborate on this application in detail. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The specification drawings forming a part of this application are used to provide a further understanding of this application. The schematic embodiments of this application and their descriptions are used to explain this application and do not constitute an improper limitation to this application.

[0025] In the drawings:

[0026] Figure 1 is a schematic structural diagram of the traditional manual assembly of the cylinder head and the pre-tightening nut of the present utility model;

[0027] Figure 2 is a schematic structural diagram of the automatic assembly device of Embodiment 1;

[0028] Figure 3 is Figure 2 a schematic structural diagram of the fixing tooling in

[0029] Figure 4 is Figure 2 a partial schematic structural diagram of the tightening tooling in

[0030] Figure 5 is Figure 3 a schematic structural diagram of the V-block and the piston rod installation in

[0031] Figure 6 is Figure 3 a schematic structural diagram of the installation sleeve and the pre-tightening nut installation in

[0032] Figure 7 is Figure 4 a schematic structural diagram of the installation sleeve and the cylinder head installation in

[0033] Figure 8 is a schematic structural diagram of the automatic assembly device of Embodiment 2;

[0034] Figure 9 It is a schematic structural diagram of the automatic assembly device in Embodiment 3;

[0035] Figure 10 It is a block diagram of the control system of the device for automatically tightening the cylinder head and the backup nut of the hydraulic cylinder in Embodiment 4;

[0036] Figure 11 It is the working flowchart of the control system block diagram of the present utility model.

[0037] Among them, the reference numerals in the figures are as follows:

[0038] 1. Manipulator grasping device; 1.1. Grasping fixture; 1.2. Buckle part;

[0039] 2. Fixed tooling; 2.1. V-shaped block; 2.2. Cardboard; 2.3. Pneumatic clamping device; 2.4. Card slot;

[0040] 3. Tightening manipulator device; 3.1. Installation sleeve; 3.2. Magnet; 3.3. Keyway; 3.4. Installation frame; 3.5. Electric or pneumatic tightening tool;

[0041] 4. Control system;

[0042] 5. Piston rod;

[0043] 6. Backup nut;

[0044] 7. Cylinder head; 7.1. Flat key part;

[0045] 8. Feeding box;

[0046] 9. Sensor;

[0047] 10. Lead screw module. Specific embodiments

[0048] It should be noted that, without conflict, the embodiments in this application and the features in the embodiments can be combined with each other. The following will refer to the drawings and combine the embodiments to detail this application.

[0049] In order to enable those skilled in the art to better understand the solution of this application, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are only a part of the embodiments of this application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative work shall fall within the protection scope of this application.

[0050] Please refer to Figure 2-11 , the embodiments provided by the present utility model:

[0051] Example 1

[0052] As Figure 2-6 shown, an automatic tightening device for the cylinder head and backup nut of a hydraulic cylinder includes a manipulator grasping device 1 for grasping the piston rod 5 and a tightening device for tightening the cylinder head 7 and the backup nut 6;

[0053] As Figure 3 shown, a fixing tooling 2, the manipulator grasping device 1 clamps the piston rod 5 through a grasping fixture 1.1 installed at the end and is installed on the fixing tooling 2. The fixing tooling 2 includes V-shaped blocks 2.1. There are two V-shaped blocks 2.1, and the two V-shaped blocks 2.1 are respectively fixedly installed on the top surface of the workbench. V-shaped grooves for placing the piston rod 5 are opened on the top surfaces of the two V-shaped blocks 2.1. A pneumatic clamping device 2.3 for clamping the piston rod 5 is provided at a supporting position on one side of one of the V-shaped blocks 2.1. The pneumatic clamping device 2.3 is installed on the top surface of the workbench. The pneumatic clamping device 2.3 clamps on the spacer mounting surface of the piston rod 5. As Figure 5 shown, a clamping plate 2.2 is installed on the side wall of the other V-shaped block 2.1. A clamping groove 2.4 is opened on the side wall of the clamping plate 2.2 and at the position of the V-shaped groove. The flat surface of the piston rod 5 is stuck in the clamping groove 2.4.

[0054] By placing the flat surface of the piston rod 5 in the clamping groove 2.4 of the clamping plate 2.2, after the fixing tooling 2 installs the piston rod 5, the piston rod 5 will not rotate on the fixing tooling 2, so as to limit the rotation of the piston rod 5.

[0055] The manipulator grasping device 1 first grasps the piston rod 5 through the grasping fixture 1.1, and then places it in the V-shaped grooves of the two V-shaped blocks on the workbench. The V-shaped blocks 2.1 use the flat position of the piston rod 5 to fix and limit the piston rod 5, which is convenient for the implementation of the automatic tightening operation. The pneumatic clamping device 2.3 presses and fixes the piston rod 5 installed on the V-shaped block 2.1 to prevent the piston rod 5 from displacing during the process of installing the cylinder head 7 and the backup nut 6. The fixing tooling 2 can be adjusted according to different specifications of the piston rod 5 and has the characteristics of modular design and quick replacement.

[0056] Among them, the position where the pneumatic clamping device 2.3 clamps the piston rod 5 is the spacer mounting surface of the piston rod 5. This cylindrical surface is a non-working surface and will not affect the use function of the piston rod 5.

[0057] As Figure 3 and Figure 4 shown, the manipulator grasping device 1 clamps the cylinder head 7 through a grasping fixture 1.1 installed at the end. The tightening device includes a tightening tooling and a moving device for driving the tightening tooling; the tightening tooling is installed on the movable end of the moving device;

[0058] AsFigure 6-7 As shown, the tightening tooling includes an installation sleeve 3.1 for loading the cylinder head 7 or the backup nut 6. A magnet 3.2 for attracting the backup nut 6 is installed in a round hole on the side wall of the installation sleeve 3.1. A keyway 3.3 for clamping the cylinder head 7 is provided on one side of the installation sleeve 3.1. Both sides of the surface at the end of the cylinder head 7 are flat key parts 7.1. The cylinder head 7 is clamped inside the keyway 3.3 through the flat key parts 7.1;

[0059] The side wall of the installation sleeve 3.1 is fixedly installed on the output shaft of an electric or pneumatic tightening tool 3.5. The electric or pneumatic tightening tool 3.5 is fixedly installed on the installation bracket 3.4 through screws, and the installation bracket 3.4 is fixedly installed on the movable end of the moving device through screws.

[0060] Among them, the moving device includes a tightening manipulator device 3, and the installation bracket 3.4 is fixedly installed on the end of the tightening manipulator device 3 through screws.

[0061] For the installation of the backup nut 6 and the cylinder head 7, the tightening manipulator device 3 drives the installation sleeve 3.1 to pick up the backup nut 6 from the feeding box 8. Since the magnet 3.2 is installed in the round hole on the side wall of the installation sleeve 3.1, the backup nut 6 is attracted by the magnet 3.2, so that the backup nut 6 can be magnetically attracted to the installation sleeve 3.1, and the backup nut 6 is limited through the rib groove formed by the limiting plates on both sides of the installation sleeve 3.1. Then, the cylinder head 7 is grabbed by the gripping fixture 1.1 on the manipulator gripping device 1 and inserted into the keyway 3.3 inside the installation sleeve 3.1, so that the flat key part 7.1 of the cylinder head 7 is clamped in the keyway 3.3.

[0062] The installation sequence is as follows: First, the tightening manipulator device 3 drives the installation sleeve 3.1 to magnetically attract the backup nut 6 from the feeding box 8. After installing the backup nut 6 on the thread at the end of the piston rod 5 first, then the cylinder head 7 is grabbed by the gripping fixture 1.1 on the manipulator gripping device 1 and installed on the installation sleeve 3.1, and then the cylinder head 7 is installed on the thread at the end of the piston rod 5.

[0063] The electric or pneumatic tightening tool 3.5 drives the rotation of the installation sleeve 3.1, and the cylinder head 7 and the piston rod 5 are installed through the thread, thereby completing the installation of the backup nut 6, the cylinder head 7 and the piston rod 5.

[0064] It should be noted that the electric or pneumatic tightening tool 3.5 can be a servo motor, a stepper motor, or an electric or pneumatic tightening device without using a motor, as long as it can drive the rotation of the installation sleeve 3.1.

[0065] Embodiment 2

[0066] As Figure 8As shown, on the basis of Embodiment 1, the mobile device in Embodiment 1, which is the tightening manipulator device 3, is replaced with a lead screw module 10, and it can also process for automatically tightening the cylinder head 7 and the backup nut 6 by the hydraulic cylinder.

[0067] The mobile device includes a lead screw module 10. The moving table of the lead screw module 10 is fixedly installed with the mounting bracket 3.4 by screws. It should be noted that after installing the tightening tooling on the lead screw module 10, it is necessary to make the mounting sleeve 3.1 and the piston rod 5 fixed on the fixed tooling 2 be on the same axis. By moving the moving table of the lead screw module 10 back and forth, the mounting sleeve 3.1 loaded with the cylinder head 7 and the backup nut 6 is driven to approach or move away from the fixed piston rod 5, so as to install the cylinder head 7 and the backup nut 6 on the end of the piston rod 5.

[0068] Embodiment 3

[0069] As Figure 9 shown, on the basis of Embodiment 1, it is also possible to complete the automatic installation of the backup nut 6 and the cylinder head 7 without using the fixed tooling 2.

[0070] The end of the manipulator grasping device 1 is fixedly installed with the grasping fixture 1.1 by screws. A buckle member 1.2 for fixing the piston rod 5 is fixedly installed on the side wall of the clamping jaw of the grasping fixture 1.1. The buckle member 1.2 clamps and fixes the flat surface of the piston rod 5, directly fixes the piston rod 5 by the grasping fixture 1.1, and at the same time prevents the piston rod 5 from rotating. Then, the backup nut 6 and the cylinder head 7 loaded on the mounting sleeve 3.1 of the tightening manipulator device 3 are directly installed on the end of the piston rod 5 on the grasping fixture 1.1, and thus the automatic assembly of the backup nut 6 and the cylinder head 7 with the piston rod 5 can also be completed.

[0071] Embodiment 4

[0072] As Figure 10-11 shown, on the basis of Embodiment 1 or 3, in order to be able to automatically control the coordinated work of the tightening tooling, the fixed tooling 2 and the two robotic arms, and ensure the automated operation of the tightening process, a control system 4 for the device for automatically tightening the cylinder head 7 and the backup nut 6 of the hydraulic cylinder is also required. The control system 4 uses a programmable logic controller (PLC) and is equipped with a human-machine interface (HMI) to facilitate the operation and monitoring of the entire assembly process.

[0073] Among them, a sensor 9 is installed on the side wall of the V-shaped block 2.1 provided with the clamping plate 2.2. The sensor 9 can be an optoelectronic sensor or various sensors that can detect positions, and is used to monitor the installation positions of the backup nut 6 and the cylinder head 7 and the piston rod 5. A sensor 9 is also installed on the grasping fixture 1.1 to monitor the state of the piston rod 5 and the cylinder head 7 during the loading and unloading process in real time and feed back to the control system 4.

[0074] Specifically, the automatic installation process of equipping the piston rod 5 with the lock nut 6 and the cylinder head 7 is realized by the sequential control of the manipulator gripping device 1, the pneumatic clamping device 2.3 on the fixed tooling 2, the tightening manipulator device 3, and the electric or pneumatic tightening tool 3.5 by the control system 4 according to the programming of the sensor 9 and the programmable logic controller (PLC). The specific process is as follows:

[0075] 1. The manipulator gripping device 1 grips the piston rod 5 and places it on the fixed tooling 2 to ensure that the piston rod 5 is in the correct position.

[0076] 2. The fixed tooling 2 has a clamping plate 2.2 at the end of the V-shaped block 2.1 for installing the cylinder head 7, which is used to restrict the rotation and axial displacement of the piston rod 5. After the tightening manipulator device 3 places the piston rod 5 in place, the piston rod 5 is clamped by the pneumatic clamping device 2.3 to restrain the displacement of the piston rod 5 during the tightening process.

[0077] 3. The tightening manipulator device 3 carries the tightening tooling and moves to the position of the cylinder head 7 for automatic tightening operation. During the tightening process, the control system 4 monitors the tightening torque and rotation angle in real time to ensure stable and reliable connection.

[0078] 4. After the assembly is completed, the system automatic detection device automatically detects the assembly quality.

[0079] The above are only the preferred embodiments of the present application and are not used to limit the present application. For those skilled in the art, various changes and modifications can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A device for automatically tightening a cylinder head and a backup nut of a hydraulic cylinder, characterized in that: It comprises a manipulator grasping device (1) for grasping a piston rod (5) and a tightening device for tightening a cylinder head (7) and a spare nut (6); The fixing tool (2) is provided, wherein the manipulator grasping device (1) grasps the piston rod (5) through the grasping fixture (1.1) installed at the end and is installed on the fixing tool (2), and the manipulator grasping device (1) grasps the cylinder head (7) or the spare nut (6) through the grasping fixture (1.1) installed at the end and is installed on the tightening device, wherein the tightening device comprises a tightening tool and a moving device for driving the tightening tool; the tightening tool is installed on the movable end of the moving device; The tightening tool comprises a mounting sleeve (3.1) for loading a cylinder head (7) or a backup nut (6); a magnet (3.2) for attracting the backup nut (6) is installed in a circular hole on a side wall of the mounting sleeve (3.1); a keyway (3.3) for clamping the cylinder head (7) is provided on one side of the mounting sleeve (3.1); both sides of the surface of the end of the cylinder head (7) are flat key portions (7.1); the cylinder head (7) is clamped with the inside of the keyway (3.3) via the flat key portion (7.1); The side wall of the mounting sleeve (3.1) is fixedly mounted on the output shaft of an electric or pneumatic tightening tool (3.5); the electric or pneumatic tightening tool (3.5) is fixedly mounted on a mounting frame (3.4) by screws; and the mounting frame (3.4) is fixedly mounted on the movable end of the mobile device by screws.

2. A hydraulic cylinder automatic tightening cylinder head and backup nut device according to claim 1, characterized in that: The moving device comprises a tightening manipulator device (3), and the mounting frame (3.4) is fixedly mounted on the end of the tightening manipulator device (3) by means of screws.

3. The device for automatically tightening the cylinder head and the backup nut of a hydraulic cylinder according to claim 1, characterized in that: The moving device comprises a screw module (10), and the moving platform of the screw module (10) is fixedly mounted on a mounting frame (3.4) via screws.

4. A device for automatically tightening a cylinder head and a backup nut of a hydraulic cylinder according to any one of claims 1 or 3, characterized in that: The fixed tooling (2) comprises a V-shaped block (2.1), two of which are provided. The two V-shaped blocks (2.1) are respectively fixedly mounted on the top surface of the workbench, and the top surfaces of the two V-shaped blocks (2.1) are both provided with a V-shaped groove for placing a piston rod (5).

5. The device for automatically tightening the cylinder head and the backup nut of a hydraulic cylinder according to claim 4, characterized in that: A pneumatic clamping device (2.3) for clamping the piston rod (5) is provided at a support on one side of one of the V-shaped blocks (2.1), the pneumatic clamping device (2.3) being mounted on the top surface of the workbench, and the pneumatic clamping device (2.3) being clamped on the spacer mounting surface of the piston rod (5); A clamping plate (2.2) is installed on the side wall of the other V-shaped block (2.1), and a clamping groove (2.4) is provided on the side wall of the clamping plate (2.2) at the position of the V-shaped groove, and the flat surface of the piston rod (5) is clamped in the clamping groove (2.4).

6. A hydraulic cylinder automatic tightening cylinder head and backup nut device according to claim 5, characterized in that: A sensor (9) is installed on the side wall of the V-shaped block (2.1) provided with the clamping plate (2.2).

7. The device for automatically tightening the cylinder head and the backup nut of a hydraulic cylinder according to claim 1, characterized in that: The end of the manipulator grasping device (1) is fixedly mounted to the grasping clamp (1.1) by means of screws, and a clip (1.2) for fixing the piston rod (5) is fixedly mounted on the side wall of the clamping jaw of the grasping clamp (1.1), and the clip (1.2) clamps and fixes the flat surface of the piston rod (5).

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