Distance-adjustable anti-unscrewing hydraulic cylinder flat head

Abstract

A distance-adjustable screw-withdrawing-preventing hydraulic cylinder flat head comprises a flat head body and is characterized in that a connecting threaded hole is formed in the center of the end face of the flat head body, fixing threaded holes are formed in the periphery of the flat head body, the flat head body is connected with a screw of a piston rod through the connecting threaded hole, a screw-withdrawing-preventing boss and a positioning groove are formed in the screw, and a fixing clamping plate is arranged at the position of the positioning groove. The end face of the fixing clamping plate is provided with a through hole corresponding to the fixing threaded hole of the flat head body, the through hole and the fixing threaded hole are connected through a screw, and the fixing clamping plate, the flat head body and the piston rod are fixed together. Safety and reliability of transmission can be effectively guaranteed, the defect of transmission failure caused by flat head wire withdrawing when the piston rod rotates is prevented, and equipment faults are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic equipment, in particular to an adjustable-distance and anti-loosening wire hydraulic cylinder flat head. Background Art

[0002] The working site conditions of the hydraulic cylinders in hot strip mills are harsh, with large vibration and impact loads. When the piston rod rotates, the piston rod and the flat head often rotate relative to each other, resulting in the flat head loosening the wire, which causes the hydraulic transmission to fail, resulting in deviation of the hydraulic cylinder stroke, inaccurate automatic positioning, serious loosening of the flat head of the hydraulic cylinder in special parts, and disconnection between the flat head of the hydraulic cylinder and the cylinder rod, prone to major and malignant equipment accidents, seriously affecting the output. Summary of the Invention

[0003] The utility model provides an adjustable-distance and anti-loosening wire hydraulic cylinder flat head. To solve the technical problems of serious loosening of the flat head of the hydraulic cylinder and difficulty in adjustment, the utility model adopts a structure of a hydraulic cylinder flat head with a threaded connection and a fixed clamping plate, so that while the hydraulic cylinder flat head has an adjustable-distance function, it has the function of preventing the relative rotation between the piston rod and the flat head, avoiding the failure of the hydraulic transmission caused by the loosening of the wire of the hydraulic cylinder flat head. The improved threaded connection structure makes the disassembly and replacement of the hydraulic cylinder flat head faster and more convenient, with adjustable distance and anti-loosening wire, avoiding equipment failures.

[0004] To achieve the above purpose, the utility model is realized by adopting the following technical solutions:

[0005] An adjustable-distance and anti-loosening wire hydraulic cylinder flat head includes a flat head body. A connecting threaded hole is provided at the center of the end face of the flat head body, and fixing threaded holes are provided around it. The flat head body is connected to the screw rod of the piston rod through the connecting threaded hole. The screw rod is provided with a convex platform and a positioning groove for anti-loosening wire. A fixed clamping plate is arranged at the position of the positioning groove. Through holes corresponding to the fixing threaded holes of the flat head body are provided on the end face of the fixed clamping plate. Screws connect the through holes and the fixing threaded holes to fix the fixed clamping plate, the flat head body and the piston rod together.

[0006] Further, the length of the screw rod is 2 / 3 - 3 / 4 of the depth of the connecting threaded hole of the flat head body.

[0007] Further, the fixed clamping plate is of a two-half split structure. Connecting holes are provided on both sides of each half of the fixed clamping plate, and bolts are arranged in the connecting holes to fix the two-half fixed clamping plate on the positioning groove.

[0008] Further, the diameter of the convex platform is smaller than the diameter of the circle where the centers of the fixing threaded holes of the flat head body are located.

[0009] Compared with the prior art, the beneficial effects of the utility model are:

[0010] Simple manufacturing and processing, low cost, convenient installation, adjustable transmission distance, ensuring the accuracy of hydraulic transmission, effectively ensuring the safety and reliability of transmission, preventing the defect of transmission failure caused by the flat head unscrewing when the piston rod rotates, and avoiding equipment failure. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of a flat head structure of an adjustable-distance anti-back-off screw hydraulic cylinder according to the present utility model.

[0012] Figure 2 It is a schematic connection diagram of a flat head of an adjustable-distance anti-back-off screw hydraulic cylinder according to the present utility model

[0013] Figure 3 It is a schematic diagram of the piston rod provided by the present utility model.

[0014] Figure 4 It is a schematic diagram of the fixed clamping plate provided by the present utility model

[0015] In the figure: 1. Flat head body 2. Screw 3. Fixed clamping plate 4. Piston rod 5. Bolt 11. Fixed threaded hole

[0016] 12. Connecting threaded hole 31. Connecting hole 32. Through hole 41. Boss 42. Positioning groove 43. Screw rod DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] The following further describes the specific embodiments of the present utility model with reference to the drawings:

[0018] As Figure 1 、 2 shown, the working principle of an adjustable-distance anti-back-off screw hydraulic cylinder flat head is to use a fixed clamping plate 3 arranged in the positioning groove 42 of the anti-back-off screw piston rod 4. The fixed clamping plate 3 is limited and fixed by the boss 41. The through hole 32 of the fixed clamping plate 3 corresponds to the fixed threaded hole 11 on the end face of the flat head body 1 and is connected by a screw 2. The screw rod 43 of the anti-back-off screw piston rod 4 is in fit connection with the connecting threaded hole 12 in the middle of the flat head body 1. The threaded connection can adjust the distance between the screw rod 43 and the flat head body 1, adjust the transmission distance, ensure the accuracy of hydraulic transmission. The fixed clamping plate 3 and the flat head body 1 are connected by a screw 2, so as to lock and fix the flat head body 1 and the piston rod 4. The flat head body 1 and the piston rod 4 are reliably connected without relative movement, preventing the transmission failure caused by the flat head body 1 unscrewing, avoiding the occurrence of transmission accidents, and protecting the transmission equipment.

[0019] As Figures 1 - 4As shown in the figure, an adjustable anti-back-off wire hydraulic cylinder flat head includes a flat head body 1. A connecting threaded hole 12 is provided at the center of the end face of the flat head body 1, and fixing threaded holes 11 are provided around it. The flat head body 1 is connected to the screw 43 of the piston rod 4 through the connecting threaded hole 12. The screw 43 and the threaded hole 12 are matched. According to the distance required for the equipment to drive, the penetration depth of the screw 43 is adjusted, the distance between the flat head body 1 and the piston rod 4 is adjusted, the transmission accuracy is improved, and the transmission distance can also be finely adjusted during the transmission process. Without disassembling the flat head body 1, only the screw 2 on the fixing clamping plate 3 needs to be disassembled to rotate and adjust the depth of the screw 43 inserted into the connecting threaded hole 12, thereby adjusting the transmission distance. The adjustment of the transmission distance is convenient and fast. After adjusting the transmission distance, the fixing clamping plate 3 and the piston rod 4 are connected and fixed to the flat head body 1 through the screw 2. A convex platform 41 and a positioning groove 42 for preventing back-off of the wire are provided on the screw 43. The fixing clamping plate 3 is arranged at the position of the positioning groove 42. Through holes corresponding to the fixing threaded holes 11 of the flat head body 1 are provided on the end face of the fixing clamping plate 3. The screw 2 connects the through hole 32 and the fixing threaded hole 11 to fix the fixing clamping plate 3, the flat head body 1 and the piston rod 4 together. The fixing clamping plate 3 is stuck in the positioning groove 42 of the piston rod 4 and abuts against one side of the convex platform 41. Through holes 32 corresponding to the fixing threaded holes 11 of the flat head body 1 are provided on the end face of the fixing clamping plate 3. The through hole 32 and the fixing threaded hole 11 are connected together through the screw 2. Since the fixing threaded holes 11 are evenly distributed on the hole wall at the end of the flat head body 1, multiple connecting screws 2 restrict each other and prevent torsion. The screw 2 fixes the fixing clamping plate 3 to the flat head body 1, thereby locking and fixing the piston rod 4 to the flat head body 1 together. Due to the limiting effect of the screw 2, when the piston rod 4 rotates, it cannot rotate relative to the flat head body 1, and the flat head body 1 will not have a back-off phenomenon, thus preventing transmission faults such as inaccurate transmission positioning and transmission failure from occurring.

[0020] As Figure 1 shown, further, the length of the screw 43 is 2 / 3 to 3 / 4 of the depth of the connecting threaded hole 12 of the flat head body 1. The screw 43 and the connecting threaded hole 12 are connected in a matching manner. The depth of the connecting threaded hole 12 is greater than the length of the screw 43, and the transmission distance adjustment ability is stronger.

[0021] As Figure 4 shown, further, the fixing clamping plate 3 is a two-half split structure. Connecting holes 31 are provided on both sides of each half of the fixing clamping plate 3. Bolts 5 are arranged in the connecting holes 31 to fix the two halves of the fixing clamping plate 3 on the positioning groove 42. The fixing clamping plate 3 is a split matching structure. Connecting holes 31 are provided on the circumferential side surface, and connecting bolts 5 are arranged in the connecting holes 31. The bolts 5 connect the two petals of the fixing clamping plate 3 together and are stuck in the positioning groove 42 of the piston rod 4.

[0022] As Figure 2As shown, further, the diameter of the boss 41 is smaller than the diameter of the circle where the center of the fixing threaded hole 11 of the flat head body 1 is located. A fixing screw 2 is required to be connected and fixed in the fixing threaded hole 11 of the flat head body 1. For the convenience of installation and disassembly, the diameter of the boss 41 must be smaller than the diameter of the circle where the center of the fixing threaded hole 11 of the flat head body 1 is located.

[0023] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. An adjustable distance anti-thread backlash hydraulic cylinder flat head, comprising a flat head body, characterized in that: A connecting threaded hole is provided at the center of the end face of the flat head body, and fixing threaded holes are provided around it. The flat head body is connected to the screw of the piston rod through the connecting threaded hole. The screw is provided with a boss and a positioning groove to prevent thread backlash. A fixing clamp is set at the position of the positioning groove. A through hole corresponding to the fixing threaded hole of the flat head body is provided on the end face of the fixing clamp, and the through hole and the fixing threaded hole are connected by screws to fix the fixing clamp, the flat head body and the piston rod together.

2. According to claim 1, the adjustable distance anti-thread backlash hydraulic cylinder flat head is characterized in that: The length of the screw rod is 2 / 3 to 3 / 4 of the depth of the connecting threaded hole of the flat head body.

3. The adjustable distance anti-thread backlash hydraulic cylinder flat head according to claim 1 is characterized in that: The fixed card plate is a two-half split structure, and connecting holes are arranged on both sides of each half of the fixed card plate. Bolts are arranged in the connecting holes to fix the two halves of the fixed card plate on the positioning grooves.

4. According to claim 1, the adjustable distance anti-thread backlash hydraulic cylinder flat head is characterized in that: The boss diameter is smaller than the diameter of the circle where the center of the fixed threaded hole of the flat head body is located.

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