CN218542786U

CN218542786U - Anti-unbalance-load self-guiding actuating device

Info

Publication number: CN218542786U
Application number: CN202223127673.2U
Authority: CN
Inventors: 刘玉峰; 杨尊磊; 郑卫国; 路振新; 管俊森
Original assignee: Taiyuan Heavy Machinery Group Yuci Hydraulic Industry Jinan Co ltd
Current assignee: Taiyuan Heavy Machinery Group Yuci Hydraulic Industry Jinan Co ltd
Priority date: 2022-11-24
Filing date: 2022-11-24
Publication date: 2023-02-28
Anticipated expiration: 2032-11-24

Abstract

The utility model relates to a hydraulic cylinder technical field specifically discloses an anti unbalance loading is from direction and is actuated device, actuate the device including guiding mechanism, guiding mechanism includes guide sleeve, guide sleeve includes sleeve and top flange, telescopic upper end and top flange welded fastening. The actuating device comprises a welded cylinder barrel, the welded cylinder barrel comprises an inner cylinder and an outer cylinder, and the inner cylinder and the outer cylinder are welded into a whole through a connecting flange; the welding cylinder is characterized in that a rear end cover is installed on the lower portion of the welding cylinder and fixedly connected with a mounting flange, a front end cover is installed on the upper portion of the welding cylinder, a piston is arranged inside the welding cylinder and fixedly connected with the lower end of the piston rod, the upper end of the piston rod penetrates through the front end cover and fixedly connected with a top flange, and a guide sleeve is sleeved on the actuating device. The actuating device can resist unbalance loading and prevent the actuating device from twisting, and has the advantages of low cost, convenience in installation and debugging, small installation space and the like.

Description

Anti-unbalance-load self-guiding actuating device

Technical Field

The utility model relates to a hydraulic cylinder technical field specifically is an anti unbalance loading self guidance actuates device.

Background

The hydraulic actuator is a power conversion device that can convert hydraulic energy into mechanical energy. The actuating device provides driving force for various working mechanisms, test devices and machine tool equipment through the reciprocating linear motion of the actuating device according to a determined control rule. The hydraulic actuating device has simple structure and reliable work, and is widely applied to the fields of machine tool equipment, engineering machinery, automobile manufacturing, metallurgy mines, aerospace and aviation and the like.

In most operating conditions in various installations, the actuating device carries an eccentric load. The actuating device bears pressure or tension in the process of realizing linear reciprocating motion of the working mechanism, and meanwhile, the actuating device is often subjected to a certain degree of unbalance loading force. When the actuating device is subjected to an unbalance load, the radial acting force can cause the piston rod to bend, so that failures such as uneven wear, fluid leakage, sealing failure and the like can be caused. Meanwhile, the piston rod is subjected to radial acting force, so that the piston rod is inevitably deflected at a certain angle relative to the cylinder body of the actuating device.

In order to solve the above problems, an external guiding mechanism is generally configured to prevent the actuating device from being subjected to a large eccentric load force and to ensure a correct movement trajectory of the actuating device. The guide mechanism is generally realized by a linear guide rail or an optical axis guide rail, the number of parts is large, the structure is complex, and the space size is large after the equipment is installed. Especially in the occasions of high frequency, large load and large offset load force, the size of the external guide mechanism is greatly increased because the actuating device needs to bear larger offset load force, and the processing and installation requirements are also improved.

Aiming at some special working conditions that the movement track and the installation space are narrow and small, some actuating devices with built-in guide mechanisms are arranged on the market. The actuating device generally adopts the cylinder barrel, the inner wall of which is provided with a guide groove, and a guide key arranged on the piston is matched to form a guide pair, thereby ensuring the correct movement track of the actuating device and reducing the whole size of the actuating device. For the torsion-resistant actuating device with built-in guide, because the guide groove is designed on the inner wall of the cylinder of the actuating device, the processing difficulty is increased, and the sizes of the diameter, the length and the like of the cylinder body are greatly limited. At the same time, the user can select the desired position,

the guide groove destroys the integrity of the inner wall, thereby easily causing the problems of sealing failure, internal leakage and the like, and being not suitable for high-pressure occasions. In addition, since the guide mechanism is integrated inside the cylinder body, the guide key is limited in size and has a low resistance against the torsion of the piston rod. The eccentric load resistance of the actuating device is basically the same as that of a common actuating device, and the actuating device resists eccentric load force by the piston rod and the guide sleeve, so that the actuating device cannot be used in occasions with large load and large eccentric load force.

Disclosure of Invention

The utility model discloses it is not enough to the above-mentioned that prior art exists, provides an anti unbalance loading self-steering and actuates the device, with guiding mechanism and actuate the device integration an organic whole, when guaranteeing to actuate device movement track, resist unbalance loading power, simplified and actuated the device structure, reduced and actuated the device size for equipment fixing and maintenance are more convenient.

In order to achieve the above purpose, the utility model provides a following technical scheme:

the utility model provides an anti unbalance loading is from direction and is moved device, includes guiding mechanism and moves the device, guiding mechanism includes guide sleeve, guide sleeve includes sleeve and top flange, sleeve upper end and top flange welded fastening.

The actuating device comprises a welding cylinder, the welding cylinder comprises an inner cylinder and an outer cylinder, and the inner cylinder and the outer cylinder are welded into a whole through a connecting flange; the welding cylinder barrel comprises a welding cylinder barrel body, a front end cover, a rear end cover, a front end cover, a piston, a guide sleeve and a mounting flange, wherein the rear end cover is installed on the lower portion of the welding cylinder barrel and fixedly connected with the mounting flange, the front end cover is installed on the upper portion of the welding cylinder barrel, the piston is arranged inside the welding cylinder barrel and fixedly connected with the lower end of the piston rod, the front end cover is penetrated through the upper end of the piston rod and fixedly connected with a top flange, and the guide sleeve is sleeved on an actuating device.

Preferably, the guide sleeve lower extreme is equipped with the annular, be equipped with slide bearing in the annular, slide bearing's hole and the outer wall sliding connection of welding cylinder constitute the friction pair.

Preferably, a through groove is formed in the side face of the guide sleeve, and a guide nest is fixedly mounted on the through groove.

Preferably, the outer wall of the welding cylinder barrel is provided with a guide block, and the guide block is connected with the guide nest in a sliding mode to form a guide pair.

Preferably, the top flange is provided with a boss, matched threads are arranged at the upper ends of the boss and the sleeve, the top flange is connected with the sleeve through the threads, and the joint between the top flange and the sleeve after connection is carried out

And (6) welding.

Preferably, the top flange is provided with through holes, two ends of each through hole are provided with grooves, thrust knuckle bearings are installed in the grooves, and the piston rod is fixedly connected with the top flange through the thrust knuckle bearings and the locking nuts.

Preferably, the front end cover is provided with a through hole, the inner wall of the through hole is provided with a ring groove, a guide belt and a sealing ring are arranged in the ring groove, and the piston rod penetrates through the through hole in the front end cover to be matched with the guide belt and the sealing ring.

Preferably, all be equipped with the location boss on front end housing and the rear end cap, be equipped with the annular on the boss of location, be equipped with the sealing washer in the annular, the sealing washer and the inner wall phase-match of welding cylinder.

Preferably, the piston is fixedly connected with the lower end of the piston rod, an annular groove is formed in the inner hole wall of the piston, a sealing ring is arranged in the annular groove and matched with the piston rod, an annular groove is formed in the outer annular wall of the piston, a guide belt and a sealing ring are arranged in the annular groove, and the guide belt and the sealing ring are matched with the inner wall of the welded cylinder barrel.

Preferably, the front end cover is provided with a port B, the port B is communicated with the rod cavity, the rear end cover is provided with a port A, and the port A is communicated with the rodless cavity.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the utility model has the advantages of simple structure and reasonable design, with guiding mechanism and actuating device integration an organic whole, need not to dispose external guiding mechanism. Compared with the common actuating device, the device has the defects of more accessories of the external guide mechanism, large installation space and the like. The actuating device can resist unbalance loading and prevent the actuating device from twisting, and has the advantages of low cost, convenience in installation and debugging, small installation space and the like. The device can be used in the occasions with severe environments, such as vibration, impact, large load, high speed and the like.

2. The welding cylinder barrel of the actuating device in the device is formed by welding an inner barrel and an outer barrel through connecting flanges, and after the welding of the cylinder barrel is completed, the cylinder barrel is integrally processed, so that the coaxiality requirement of an inner hole and an outer wall of the cylinder barrel is ensured. The outer wall of the cylinder barrel is used as a guide cylindrical surface and is in sliding connection with a sliding bearing arranged on the guide sleeve to form a friction pair. As the guide cylindrical surface, the outer wall of the cylinder barrel can bear the offset load force when the actuating device reciprocates, so the actuating device does not need to be provided with an external guide mechanism. The device has the advantages of low cost, convenience in installation and debugging, small installation space and the like.

In addition, the cylinder barrel adopts an aluminum alloy welding structure, so that the weight of materials is reduced, and the structural strength is enhanced. Is composed of

In the process, the welding structure changes the natural frequency of the actuating device, and the occurrence of system resonance is effectively avoided.

3. The guide block arranged on the outer wall of the cylinder barrel and the guide nest arranged on the guide sleeve form a guide pair, so that the action device is prevented from twisting, the linear motion of the action device is ensured, and the self-guide of the action device is realized. Because the guide mechanism is integrated on the outer wall of the cylinder barrel of the actuating device, compared with the actuating device with the built-in guide mechanism, the guide mechanism of the actuating device has the advantages of simple processing, convenient installation and maintenance, large installation space and the like. Because the width dimension of the guide block in the torque direction can be designed in a wide range, the actuating device can resist larger torsion force. And the external guide mechanism can effectively solve the problems of sealing failure, internal leakage and the like caused by the incompleteness of the inner wall of the cylinder with the internal guide mechanism. The device can be used for occasions with severe working conditions such as high pressure, heavy load and the like.

4. The guide sleeve and the piston of the device are made of high-quality aluminum alloy with corrosion resistance, welding performance and good mechanical property. The mass of the moving part of the actuating device is reduced, and the system inertia of the actuating device during movement is effectively reduced. Meanwhile, the piston and the front end cover sealing element are sealed by adopting a high-quality low-friction combination in the design process, so that the movement is not viscous or sliding at very low and very high piston speeds, and the friction force of a contacted sealing ring is reduced to the minimum. Meanwhile, the sliding bearing arranged on the guide sleeve is made of a wear-resistant material with a low friction coefficient, so that the effects of reducing the friction factor and improving the wear resistance are achieved. The extremely low friction damping and system inertia greatly reduce the starting pressure of the actuating device and improve the dynamic response characteristic of the actuating device.

5. The friction pair formed by the sliding bearing arranged on the guide sleeve and the outer wall of the cylinder barrel is in clearance fit, so that the guide sleeve inevitably vibrates and deflects when being subjected to larger unbalance loading force in the working process of the actuating device. In order to avoid the influence of the vibration and deflection of the guide sleeve on the piston rod, a thrust knuckle bearing is arranged between a flange at the top of the guide sleeve of the actuating device and the piston rod, and the centering characteristic of the thrust knuckle bearing can prevent the piston rod from vibrating and deflecting along with the guide sleeve, so that the performance of the actuating device is better ensured, and the service life of the actuating device is prolonged.

6. The device adopts a rolling processing technology to weld the inner hole and the outer wall of the cylinder barrel and the surface of the piston rod, reduces the elastic and plastic deformation of the contact surface of the friction pair, improves the surface smoothness and improves the wear resistance and the corrosion resistance of the surface of the piston rod. And can delay the generation or the expansion of fatigue cracks, thereby improving the fatigue strength of the piston rod.

Drawings

FIG. 1 is a view of the appearance structure of the present invention;

FIG. 2 is a cross-sectional view of the present invention;

FIG. 3 is a schematic structural view of a guide sleeve;

fig. 4 is a partial structural schematic diagram of fig. 2.

In the figure: 1. a guide mechanism; 11. a guide sleeve; 111. a sleeve; 112. a top flange; 121. guiding nesting; 122. a guide block; 13. a sliding bearing; 2. an actuating device; 21. welding the cylinder barrel; 211. an inner barrel; 212. an outer cylinder; 213. a connecting flange; 22. a front end cap; 23. a rear end cap; 24. a piston; 25. a piston rod; 26. a thrust knuckle bearing; 27. locking the nut; 28. installing a flange; 3. and a displacement sensor.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Example 1

An anti-unbalance-load self-guiding actuating device is shown in fig. 1-4 and comprises a guiding mechanism 1 and an actuating device 2, wherein the guiding mechanism 1 comprises a guiding sleeve 11, the guiding sleeve 11 comprises a sleeve 111 and a top flange 112, and the upper end of the sleeve 111 is welded and fixed with the top flange 112.

The top flange 112 is provided with a boss, the boss and the sleeve 111 are provided with matched threads, the top flange 112 is connected with the sleeve 111 through the threads, and a seam after the top flange 112 is connected with the sleeve 111 is welded.

The material of the guide sleeve 11 is high-quality aluminum alloy with corrosion resistance, welding performance and good mechanical property. The sleeve 111 and the top flange 112 are processed in a split mode before being welded, threads are processed on the sleeve 111 and the top flange 112, the sleeve 111 and the top flange 112 are fastened and connected through the threads before being welded, and tolerance requirements after the guide sleeve 11 is assembled are guaranteed. After the sleeve 111 and the top flange 112 are fastened through threads, the periphery of the joint is fully welded, and the strength requirement of the guide sleeve 11 is guaranteed.

The side surface of the guide sleeve 11 is provided with a through groove, and a guide nest 121 is fixedly arranged on the through groove.

The guide nest 121 is made of high-strength and friction-resistant alloy steel and is arranged on a through groove in the side surface of the guide sleeve 11, so that the structural strength and the wear resistance of a guide part are improved.

The lower extreme of guide sleeve 11 is equipped with the annular, be equipped with slide bearing 13 in the annular.

The sliding bearing 13 is installed in the annular groove at the bottom of the guide sleeve 11, the sliding bearing 13 is matched with the annular groove, and the end part is provided with a rotation stopping screw to prevent the sliding bearing 13 from rotating and falling off. The outer wall of the welded cylinder 21 is used as a guide cylindrical surface and forms a friction pair with the inner hole of the sliding bearing 13, and the outer wall of the cylinder is used as a guide cylindrical surface and is used for bearing the offset load force when the actuating device 2 reciprocates. Meanwhile, in the operation process of the actuating device 2, the solid lubricant of the sliding bearing 13 is released to the surface of the bearing to form a solid lubricating film, so that the effects of reducing the friction factor and improving the wear resistance are achieved.

The actuating device 2 comprises a welding cylinder 21, a mounting flange 28, a front end cover 22, a rear end cover 23, a piston 24 and a piston rod 25.

The rear end cover 23 is installed on the lower portion of the welding cylinder 21, the rear end cover 23 is fixedly connected with the mounting flange 28, the front end cover 22 is installed on the upper portion of the welding cylinder 21, the piston 24 is arranged inside the welding cylinder 21, the piston 24 is fixedly connected with the lower end of the piston rod 25, the upper end of the piston rod 25 penetrates through the front end cover 22 to be fixedly connected with the top flange 112, and the guide sleeve 11 is sleeved on the actuating device 2.

The welding cylinder 21 comprises an inner cylinder 211 and an outer cylinder 212, and the inner cylinder 211 and the outer cylinder 212 are welded through a connecting flange 213.

The inner cylinder 211 and the outer cylinder 212 are made of high-quality alloy steel with corrosion resistance, good welding performance and good mechanical property. And after welding, the welding cylinder 21 is integrally processed, and the requirement on the perpendicularity of the inner hole and the mounting flange 28 and the requirement on the coaxiality of the inner hole and the outer wall are met during processing.

The guide block 122 is fixedly installed on the outer cylinder 212, and the guide block 122 is slidably connected with the guide nest 121.

The guide block 122 and the guide nest 121 arranged on the guide sleeve 11 form a guide pair, so that the actuating device 2 is prevented from twisting, the linear motion of the actuating device 2 is ensured, and the self-guiding of the actuating device 2 is realized.

Meanwhile, the solid lubricant in the guide block 122 is released to the surface to form a solid lubricant film in the operation process of the actuating device 2, so that an extremely low friction coefficient is obtained, and the wear resistance and the seizure resistance of the guide pair are effectively improved. The external guide block 122 has a wider design range of the width dimension in the torque direction and can resist a larger torsional force.

The inner cylinder 211 is internally provided with a piston 24 with the diameter matched with that of the inner cylinder 211, the bottom end of the piston rod 25 is fixedly arranged on an inner hole of the piston 24 and keeps concentric work with the piston 24, the upper end of the inner cylinder 211 is fixedly provided with a front end cover 22, and the lower end of the inner cylinder 211 is fixedly provided with a rear end cover 23.

The front end cover 22 is provided with a through hole which is matched with the piston rod 25, and a thrust knuckle bearing 26 is installed between the top end of the piston rod 25 and the top flange 112 and is fastened and fixed by a locking nut 27.

Since the sliding bearing 13 mounted on the guide sleeve 11 and the friction pair formed by the outer wall of the cylinder barrel are in clearance fit, vibration and deflection inevitably occur when the guide sleeve 11 is subjected to a large deflection load during the operation of the actuating device 2. In order to avoid that the guide sleeve 11 vibrates and deflects to influence the piston rod 25, a thrust knuckle bearing 26 is arranged between the guide sleeve 11 and the piston rod 25 of the actuating device 2. The centering property of the thrust knuckle bearing 26 can prevent the piston rod 25 from vibrating and deflecting along with the guide sleeve 11, thereby better ensuring the performance of the actuating device 2 and prolonging the service life of the actuating device 2.

And positioning bosses are arranged on the front end cover 22 and the rear end cover 23, and annular grooves are arranged on the positioning bosses.

The positioning bosses on the front end cover 22 and the rear end cover 23 are tightly matched with the inner cylinder 211, and the ring grooves on the bosses of the front end cover 22 and the rear end cover 23 are used for mounting sealing rings to prevent hydraulic oil from leaking.

The front end cover 22 is provided with a port B, and the rear end cover 23 is provided with a port A. The port A is communicated with the rodless cavity, and the port B is communicated with the rod cavity.

When the actuating device 2 works, the hydraulic system alternately inputs flow and pressure to the port A or the port B according to a determined control rule, so that the piston rod 25 of the actuating device 2 reciprocates. Because a thrust joint bearing 26 is arranged between the piston rod 25 and the guide sleeve 11 and is fastened and fixed by using a locking nut 27; and a top flange 112 of the guide sleeve 11 is provided with a threaded hole for connecting with a load mechanism. Therefore, when the piston rod 25 of the actuating device 2 reciprocates, the piston rod 25 drives the guide sleeve 11 to reciprocate together, thereby providing driving force for various working mechanisms such as machine tool equipment and testing devices.

Example 2

On the basis of embodiment 1, this device side-mounting has displacement sensor 3, and displacement sensor 3's upper end is connected with the upper end of guide sleeve 11, and the lower extreme is connected with mounting flange 28, and this device during operation can carry out real time monitoring to actuating device 2 displacement signal, speed signal to real-time displacement signal, the speed signal feedback control system. After the control system receives the displacement signal and the speed signal, the motion characteristic curve of the actuating device 2 is calculated through a computer simulation system, and then the control signal is fed back to the hydraulic system, so that closed-loop control over the vibration displacement and the speed of the actuating device 2 is achieved.

It will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. An anti-unbalance-load self-guiding actuating device comprises a guiding mechanism and an actuating device, and is characterized in that the guiding mechanism comprises a guiding sleeve, the guiding sleeve comprises a sleeve and a top flange, and the upper end of the sleeve is welded and fixed with the top flange;

the actuating device comprises a welded cylinder barrel, the welded cylinder barrel comprises an inner cylinder and an outer cylinder, and the inner cylinder and the outer cylinder are welded into a whole through a connecting flange; the welding cylinder is characterized in that a rear end cover is installed on the lower portion of the welding cylinder and fixedly connected with a mounting flange, a front end cover is installed on the upper portion of the welding cylinder, a piston is arranged inside the welding cylinder and fixedly connected with the lower end of the piston rod, the upper end of the piston rod penetrates through the front end cover and fixedly connected with a top flange, and a guide sleeve is sleeved on the actuating device.

2. An anti-eccentric load self-guiding actuating device as claimed in claim 1, wherein the lower end of the guiding sleeve is provided with a ring groove, a sliding bearing is arranged in the ring groove, and an inner hole of the sliding bearing is slidably connected with the outer wall of the welding cylinder barrel to form a friction pair.

3. The device of claim 1, wherein the guide sleeve has a through slot formed in a side surface thereof, and a guide nest is fixedly mounted on the through slot.

4. An anti-unbalance-loading self-guiding actuating device as claimed in claim 3, wherein a guide block is mounted on the outer wall of the welding cylinder barrel, and the guide block is slidably connected with the guide nest to form a guide pair.

5. An anti-offset load self-guiding actuating device as claimed in claim 1, wherein the top flange is provided with a boss, the boss and the upper end of the sleeve are provided with matching threads, the top flange and the sleeve are connected through the threads, and a seam between the top flange and the sleeve is welded.

6. The device of claim 5, wherein the top flange is provided with a through hole, two ends of the through hole are provided with grooves, the grooves are provided with the thrust knuckle bearings, and the piston rod is fixedly connected with the top flange through the thrust knuckle bearings and the lock nut.

7. The device of claim 1, wherein the front cover has a through hole, the through hole has a ring groove on the inner wall, the ring groove has a guiding belt and a sealing ring, and the piston rod passes through the through hole of the front cover to match the guiding belt and the sealing ring.

8. An anti-bias load self-steering actuation device according to claim 7, wherein said front face is shaped to provide a front face with a front surface

The end cover and the rear end cover are both provided with positioning bosses, annular grooves are formed in the positioning bosses, sealing rings are arranged in the annular grooves, and the sealing rings are matched with the inner wall of the welding cylinder barrel.

9. An anti-unbalance loading self-guiding actuating device as defined in claim 8, wherein said piston is fixedly connected to the lower end of the piston rod, said piston is provided with a ring groove on the inner wall of the piston, said ring groove is provided with a sealing ring, said sealing ring is engaged with the piston rod, said piston is provided with a ring groove on the outer circumferential wall, said ring groove is provided with a guiding strip and a sealing ring, said guiding strip and said sealing ring are engaged with the inner wall of the welded cylinder.

10. An anti-bias load self-guiding actuating device as claimed in claim 9, wherein said front end cap is provided with a port B, said port B communicating with the rod chamber, said rear end cap is provided with a port a, said port a communicating with the rodless chamber.