Hydraulic actuator cylinder polish rod locking clamp device

Abstract

The utility model belongs to the technical field of structural assembly, and particularly relates to a hydraulic actuator cylinder polish rod locking clamp device which comprises a first clamp, a second clamp and a locking force arm. Wherein the second clamping hoop is connected with the first clamping hoop through a nut, and a groove used for clamping a polished rod of the hydraulic actuator cylinder is further formed between the second clamping hoop and the first clamping hoop; and the second hoop is connected with the locking force arm. According to the hydraulic actuating cylinder locking device, locking of the standby locking nut is completed without disassembling the hydraulic actuating cylinder, the time needed for tightening the hydraulic actuating cylinder is shortened, and meanwhile damage to the hydraulic actuating cylinder in the disassembling, assembling, carrying and common tool clamping processes is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of structural assembly, and specifically relates to a locking clamp device for the polished rod of a hydraulic actuator. Specifically, it is about a clamp device that can lock the polished rod of a hydraulic actuator. When the backup nut of the hydraulic actuator is torqued by a cylinder torque device, the polished rod of the hydraulic actuator will rotate along with the torque wrench. At this time, the polished rod of the hydraulic actuator is locked by this clamp device, and a reverse force is applied to the clamp device to complete the torque of the backup nut of the actuator. Background Art

[0002] During the pre-delivery inspection of a certain aircraft, it was found that the backup nut of the actuator of the aft cargo compartment door was loose and difficult to tighten, and this problem was repeatedly reported at the general assembly flight test factory. After investigation, at present, the tightening torque required for the backup nut of the hydraulic actuator is large. When tightening the backup nut, the polished rod of the actuator needs to bear the same reaction force. However, the polished rod of the hydraulic actuator is cylindrical and has a coating, and the polished rod of the hydraulic actuator itself is a moving part in the actuator, so that the polished rod of the actuator rotates as the backup nut is tightened. Moreover, the commonly used tools for the actuator cannot effectively clamp and fix it during the installation process. At present, after the operator adjusts the remaining stroke of the actuator, when the backup nut of the actuator needs to be tightened, the entire hydraulic actuator needs to be removed, the polished rod of the actuator is clamped on both sides with a vise, and then the backup nut is torqued. This method requires the entire hydraulic actuator to be removed during tightening, which takes a long time for disassembly, installation and handling, and is easy to damage the surface of the actuator. Summary of the Utility Model

[0003] 1. Technical Problem to be Solved

[0004] The utility model solves the problem in the prior art that the polished rod of the hydraulic actuator cannot be locked without removing the hydraulic actuator. The polished rod of the hydraulic actuator itself is a moving part of the actuator, and its surface is cylindrical and has a coating. Through the locking clamp device for the polished rod of the hydraulic actuator, a reverse torque required to lock the backup nut can be applied to the polished rod in the installed state of the hydraulic actuator to complete the locking of the backup nut.

[0005] 2. Technical Solution

[0006] In order to solve the above technical problems, the utility model is realized through the following technical solutions:

[0007] A locking device for the backup nut of a hydraulic actuator includes a first clamp, a second clamp, and a locking force arm; wherein, the second clamp is connected to the first clamp by a nut, and a groove for clamping the polished rod of the hydraulic actuator is further provided between the second clamp and the first clamp; the second clamp is connected to the locking force arm.

[0008] Furthermore, a rubber pad is further arranged in the middle groove of the first clamp and the second clamp.

[0009] Further, the rubber pad is pasted or directly vulcanized in the groove.

[0010] Further, a fork ear is provided at the lower end of the second clamp, and the locking force arm is fixedly connected to the fork ear.

[0011] Further, a certain gap is left between the first clamp and the second clamp.

[0012] Further, the locking force arm adopts the structural form of a transfer arm.

[0013] The utility model relates to a locking clamp device for the polished rod of a hydraulic actuator. When locking the backup nut of the hydraulic actuator, rubber pads are pasted on the inner sides of the first clamp and the second clamp of the locking device. The first clamp locks the cargo hold door actuator through 4 bolts, and then the fork ear on the second clamp is connected to the force arm. The operator applies a reaction force to the polished rod of the actuator through the force arm to ensure the smooth tightening of the backup nut.

[0014] The utility model not only realizes the locking of the backup nut without disassembling the hydraulic actuator, but also shortens the time required for tightening the hydraulic actuator. At the same time, it also reduces the damage to the hydraulic actuator during the disassembly, assembly, handling and clamping process with ordinary tools.

[0015] 3. Beneficial effects

[0016] Compared with the prior art, the beneficial effects (advantages) of the utility model are as follows:

[0017] 1. When applying the fixed force to the backup nut, after the first clamp and the second clamp of the utility model are locked with the polished rod of the actuator in the installed state of the actuator, a reverse force can be applied to complete the fixed force of the backup nut, saving a large amount of operation time.

[0018] 2. There is no need to disassemble the hydraulic actuator, and there will be no damage caused by the secondary disassembly, assembly and handling process.

[0019] 3. The rubber pad on the inner side of the clamp has the same diameter as the polished rod of the actuator, and the rubber pad has a buffering and protecting effect, reducing the damage to the hydraulic actuator during the tool clamping process. Description of the drawings

[0020] The utility model includes 1 figure, and the description of these drawings is as follows:

[0021] Figure 1 It is a schematic structural diagram of the locking clamp device.

[0022] Among them, 1. First clamp; 2. Second clamp; 3. Locking force arm. Detailed implementation manners

[0023] The following is a detailed description of the docking device of the utility model in combination with the force setting process of the hydraulic actuator of the backup nut of a certain model of fuselage tail section:

[0024] As attached Figure 1 As shown, a hydraulic actuator backup nut locking device is provided, which is composed of three main parts: a first clamp 1, a second clamp 2, and a locking force arm 3;

[0025] During the specific implementation process, when the hydraulic actuator backup nut is locked, a rubber pad is attached to the inner side of the first clamp 1 of the locking device, and a rubber pad is attached to the inner side of the second clamp 2. The first clamp locks the cargo hold door actuator through 4 bolts, and then is connected to the lever arm 3 through the fork ear on the second clamp 2. The operator applies a reaction force to the actuator rod through the lever arm to ensure that the backup nut is tightened smoothly.

[0026] The process of setting the force of the backup nut of the hydraulic actuator of a certain type of cargo hold door is as follows: after the operator has adjusted the remaining stroke of the actuator, the backup nut is pre-tightened. At this time, the first clamp 1 and the second clamp 2 are installed and fixed on the bare rod of the hydraulic actuator of the rear door, and the connecting bolts of the first clamp 1 and the second clamp 2 are tightened in place. The locking arm 3 is installed on the second clamp 2, and the fixing bolts are tightened. When the backup nut needs to be set, a reaction force equal to the setting value of the backup nut is applied to the locking arm 3, and the backup nut can be locked or set. On different cylindrical parts that need to apply a larger tightening torque, the size or form of the locking arm can be adapted to different operating requirements by changing the inner diameter size or form of the first clamp 1 and the second clamp 2.

[0027] During the specific implementation process, the material of the locking device is 45# steel, which has strong strength and rigidity. The specific material is selected according to the required locking torque of the hydraulic actuator rod and the size of the hydraulic actuator rod. The required dimensional tolerance of the inner diameter of the first clamp 1 and the second clamp 2 is set according to the size of the hydraulic actuator rod plus the thickness of the rubber pad; a certain gap is left between the first clamp 1 and the second clamp 2 to ensure that the hydraulic actuator rod can be effectively locked, and the external dimensions need to be determined according to the locking torque required by the backup nut; the locking arm 3 can be set in length according to the on-site requirements, and the transfer arm structure can also be set according to the on-site space requirements. The locking arm 3 determines its external dimensions and form according to the locking torque required by the backup nut.

[0028] The utility model not only realizes the locking of the backup nut without disassembling the hydraulic actuator, but also shortens the time required for tightening the hydraulic actuator, and also reduces the damage to the hydraulic actuator during the disassembly, transportation and clamping of ordinary tools.

[0029] Finally, it should be noted that the above embodiments or examples are only used to illustrate the technical solutions of the present utility model, and the unelaborated parts are regarded as conventional technical means or common general knowledge in the art; it should be understood that the protection scope of the present utility model is not limited to the above specific implementation forms, and any person skilled in the art can easily think of various equivalent modifications or substitutions within the technical scope disclosed by the present utility model, and these modifications or substitutions should all be covered within the protection scope of the present utility model.

Claims

1. A hydraulic actuator polished rod locking clamp device, characterized in that It includes a first clamp, a second clamp and a locking force arm; wherein the second clamp is connected to the first clamp via a nut, and a groove for clamping the hydraulic actuator rod is provided between the second clamp and the first clamp; the second clamp is connected to the locking force arm.

2. The hydraulic actuator polished rod locking clamp device according to claim 1, characterized in that, A rubber pad is also arranged in the groove between the first clamp and the second clamp.

3. The hydraulic actuator polished rod locking clamp device according to claim 2, wherein The rubber pad is glued or directly vulcanized in the groove.

4. A hydraulic actuator polished rod locking clamp device as described in claim 1, characterized in that, A fork ear is arranged at the lower end of the second clamp, and the locking force arm is connected and fixed to the fork ear.

5. A hydraulic actuator polished rod locking clamp device according to claim 1, characterized in that A certain gap is left between the first clamp and the second clamp.

6. The hydraulic actuator polished rod locking clamp device according to claim 1, wherein, The locking force arm adopts a transfer arm structure.

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