Device for automatically assembling guide ring of hydraulic oil cylinder

Abstract

The utility model provides a hydraulic oil cylinder guide ring automatic assembly device which comprises a transmission line, a material storage device, a feeding device, a flexible assembly mechanism and an outer diameter reducing device, a piston used for waiting for installation of a guide ring is fixed on a tray of the transmission line, the material storage device comprises a rotating disc, a material frame and a feeding table, and the feeding table is arranged on the rotating disc. The rotating disc is rotationally arranged above the feeding table through a motor, and the multiple material frames are evenly fixed to the surface of the rotating disc. The position and the assembling force of the guide ring in the assembling process are accurately controlled through the automation technology, it is ensured that the guide ring is rapidly installed in place, the automatic device can reduce labor cost and assembling errors, improve production efficiency and assembling quality, completely avoid various damage generated when the guide ring is generally manually assembled, and improve the production efficiency and the assembling quality. The automatic assembling device can be widely applied to automatic assembling of guide rings on hydraulic oil cylinder pistons of different specifications and models and has the advantages of being easy and convenient to operate, efficient in assembling, high in adaptability, stable and reliable.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic oil cylinder guide ring assembly, in particular to a device for automatically assembling a hydraulic oil cylinder guide ring. Background Art

[0002] A hydraulic cylinder is a device that converts hydraulic energy into mechanical energy. It is mainly composed of a cylinder body, a piston, a seal and other parts. The liquid is pumped into the oil circuit at the bottom of the cylinder through the pump in the hydraulic system. The work is achieved through the movement of the piston, thereby generating force to achieve functions such as pushing, pulling, and lifting objects. It has the characteristics of large bearing capacity, stable operation, and high reliability. It is suitable for work occasions that require high precision and high force.

[0003] The guide ring (also called Gley ring) on ​​the piston of the hydraulic cylinder plays a supporting and guiding role. The guide sleeve prevents the piston or piston rod from direct contact and friction with the cylinder body during movement, and protects the cylinder body and the piston or piston rod from damage. The commonly used material is polytetrafluoroethylene, and its assembly quality is directly related to the sealing performance and service life of the cylinder. The traditional assembly process usually relies on manual operation, which is not only inefficient, but also prone to improper installation or damage to the sealing ring, resulting in unstable product quality, resulting in a low product yield of the hydraulic cylinder and increased maintenance costs of the hydraulic cylinder. Utility Model Content

[0004] The utility model aims to provide a device for automatically assembling a guide ring of a hydraulic cylinder to solve the problems raised in the above-mentioned background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A device for automatically assembling a guide ring of a hydraulic oil cylinder, comprising a transmission line, a material storage device, a feeding device, a flexible assembly mechanism and an outer diameter reduction device, wherein a piston for waiting to install a guide ring is fixed on a tray of the transmission line;

[0007] The material storage device comprises a turntable, a material rack and a loading platform, the turntable is rotated by a motor and arranged above the loading platform, and a plurality of material racks are evenly fixed on the surface of the turntable;

[0008] The feeding device comprises a collaborative robot, a pneumatic clamp and a plurality of sets of three conical sleeves, wherein the pneumatic clamp is arranged at the end of the collaborative robot, and the conical sleeve is clamped and fixed by the pneumatic clamp;

[0009] The flexible assembly mechanism comprises a flexible opening sleeve and a first electric cylinder, wherein the first electric cylinder is fixed above the transmission line, and the flexible opening sleeve is fixed to the output end of the first electric cylinder;

[0010] The outer diameter reducing device comprises a shrinking sleeve and a second electric cylinder, wherein the second electric cylinder is fixed above the transmission line, and the shrinking sleeve is fixed to the output end of the second electric cylinder.

[0011] Preferably, a positioning mechanism is provided on the transmission line, and the positioning mechanism includes a first cylinder and a guide rod, the first cylinder is fixed in the transmission line, one end of the guide rod is fixed to the output end of the first cylinder, and a positioning hole matching the guide rod is provided at the bottom of the tray of the transmission line.

[0012] Preferably, the material storage device also includes a base, a second cylinder, a third cylinder and a through hole, the through hole is arranged on the surface of the base, the base is fixed to the surface of the loading platform, the bottom end of the material rack extends into the through hole, the second cylinder is fixed to the top of the base and the guide ring is clamped on the surface of the material rack by a limit piece, the third cylinder is fixed to the bottom of the base, and the bottom of the material rack is concentrically arranged with one of the conical sleeves.

[0013] Preferably, the limit member includes an upper stopper and a lower stopper, the upper stopper is fixed to the output end of the second cylinder, and the lower stopper is fixed to the output end of the third cylinder, and in an initial state, the upper stopper and the lower stopper are both in an extended state.

[0014] Preferably, the flexible open sleeve is in an inverted cone shape, and a plurality of notches are arranged on the surface of the flexible open sleeve, and the minimum inner diameter of the lowermost opening portion of the flexible open sleeve is larger than the top outer diameter of the tapered sleeve.

[0015] Preferably, the inner wall of the bottom of the shrink sleeve transitions from a conical surface to a cylindrical surface, and the inner diameter of the cylindrical surface is larger than the outer diameter of the piston.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] The utility model adopts the automation technology to accurately control the position and assembly force of the guide ring during the assembly process, and ensures that the guide ring is quickly installed in place. This automatic device can reduce labor costs and assembly errors, improve production efficiency and assembly quality, and completely avoid various damages that usually occur during manual assembly of guide rings. It can be widely used in the automatic assembly of guide rings on hydraulic cylinder pistons of different specifications and models, and has the characteristics of simple operation, efficient assembly, strong adaptability, stability and reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the installation of the guide ring in the prior art;

[0019] Figure 2 It is a schematic diagram of the main structure of the utility model;

[0020] Figure 3For this utility model Figure 2 Schematic diagram of the enlarged structure of area A in the middle;

[0021] Figure 4 For this utility model Figure 2 Schematic diagram of the enlarged structure of area B in the middle;

[0022] Figure 5 This is the principle diagram of the automatic control system of the utility model;

[0023] Figure 6 It is a schematic diagram of the main structure of the material storage device of the utility model.

[0024] In the figure: 1. transmission line; 2. material storage device; 21. turntable; 22. material rack; 23. loading platform; 24. base; 25. second cylinder; 26. third cylinder; 27. through hole; 28. upper block; 29. ​​lower block; 3. loading device; 31. collaborative robot; 32. pneumatic gripper; 33. tapered sleeve; 4. flexible assembly mechanism; 41. flexible opening sleeve; 42. first electric cylinder; 43. notch; 5. outer diameter reducing device; 51. shrinking sleeve; 52. second electric cylinder; 6. positioning mechanism; 61. first cylinder; 62. guide rod. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0026] See also Figure 1 , Figure 1 Schematic diagram of installing a guide ring on a hydraulic cylinder in the prior art

[0027] See also Figure 2-6 The utility model provides a device for automatically assembling a guide ring of a hydraulic cylinder, comprising a transmission line 1, a material storage device 2, a feeding device 3, a flexible assembly mechanism 4 and an outer diameter reduction device 5, and a piston for waiting to install a guide ring is fixed on the tray of the transmission line 1;

[0028] The storage device 2 is used to temporarily store guide rings of different specifications, and to discharge guide rings of a certain specification one by one during assembly. The loading device 3 ensures that the conical sleeve 33 with the guide ring is transported from the bottom of the storage device 2 and placed steadily on the piston or guide sleeve. The flexible assembly mechanism 4 ensures that the guide ring is pushed into the corresponding groove of the piston or guide sleeve, and the outer diameter reducing device 5 reduces the outer diameter of the guide ring.

[0029] The material storage device 2 includes a turntable 21, a material rack 22 and a loading platform 23. The turntable 21 is rotated by a motor and is arranged above the loading platform 23. A plurality of material racks 22 are evenly fixed on the surface of the turntable 21.

[0030] See also Figure 2 In this embodiment, the number of material racks 22 is set to eight, and the diameters of the material racks 22 are different. Guide rings of different specifications are stored on the material racks 22 of corresponding diameters. When a guide ring of a certain specification is needed, the turntable 21 rotates the material rack 22 of a certain size to the loading platform 23, and the guide rings are loaded one by one.

[0031] The feeding device 3 includes a collaborative robot 31, a pneumatic clamp 32 and a plurality of sets of three conical sleeves 33, wherein the pneumatic clamp 32 is arranged at the end of the collaborative robot 31, and the conical sleeve 33 is clamped and fixed by the pneumatic clamp 32;

[0032] See also Figure 2 The pneumatic clamp 32 can clamp two conical sleeves 33 at a time. During normal operation, the collaborative robot 31 replaces the conical sleeve 33 with a guide ring under the loading table 23 with the empty conical sleeve 33 without a guide ring on the pneumatic clamp 32, and then replaces the empty conical sleeve 33 without a guide ring on the piston at the installation position, and repeats this cycle.

[0033] It should be noted that at the beginning of operation, there are no guide rings on the three conical sleeves 33. The collaborative robot 31 uses two empty pneumatic grippers 32 to take two conical sleeves 33, one of which is first placed on the loading platform 23. When waiting for the guide ring to fall on the conical sleeve 33, the collaborative robot 31 uses the empty pneumatic gripper 32 to take away the conical sleeve 33 with the guide ring, and puts the conical sleeve 33 without the guide ring on the other pneumatic gripper 32 on the loading platform 23. The collaborative robot 31 turns around and places the conical sleeve 33 with the guide ring on the pneumatic gripper 32 At the installation position of the transmission line 1, the two pneumatic grippers 32 in the hands of the collaborative robot 31 are empty. The collaborative robot 31 then turns to the third empty conical sleeve 33 and picks it up, and goes to the loading table 23 to replace the second conical sleeve 33 on the loading table 23 with the empty conical sleeve 33, which has just had a guide ring placed on it. The third empty conical sleeve 33 is waiting for loading. The collaborative robot 31 takes the second conical sleeve 33 with the guide ring to the installation position of the transmission line 1, and replaces the first conical sleeve 33 that has been installed and has used up the guide ring, thus cyclically loading and assembling.

[0034] The flexible assembly mechanism 4 includes a flexible opening sleeve 41 and a first electric cylinder 42. The first electric cylinder 42 is fixed above the transmission line 1. The flexible opening sleeve 41 is fixed to the output end of the first electric cylinder 42. The flexible opening sleeve 41 is an inverted cone, and a plurality of notches 43 are provided on the surface of the flexible opening sleeve 41. The minimum inner diameter of the lowermost opening portion of the flexible opening sleeve 41 is greater than the top outer diameter of the conical sleeve 33.

[0035] See also Figure 3 The first electric cylinder 42 can control the flexible open sleeve 41 to move downward, and the flexible open sleeve 41 contacts the conical sleeve 33 with a guide ring on the piston. At this time, the flexible open sleeve 41 is squeezed by the first electric cylinder 42 and can press the guide ring on the conical sleeve 33 into the groove on the piston. When installing pistons of different specifications, the first electric cylinder 42 presses down different strokes according to the setting to ensure that the guide ring is pressed into the piston groove.

[0036] The outer diameter reducing device 5 includes a shrinking sleeve 51 and a second electric cylinder 52. The second electric cylinder 52 is fixed above the transmission line 1. The shrinking sleeve 51 is fixed to the output end of the second electric cylinder 52. The bottom inner wall of the shrinking sleeve 51 transitions from a conical surface to a cylindrical surface. The inner diameter of the cylindrical surface is larger than the outer diameter of the piston.

[0037] See also Figure 4 The piston on the tray is transferred by the transmission line 1 to the position directly below the set shrink sleeve 51. The second electric cylinder 52 controls the shrink sleeve 51 to move downward. At this time, the inner edge of the shrink sleeve 51 can reduce the guide ring whose diameter is enlarged by the tapered sleeve 33 back to its original size, making it easier to install the piston assembly into the cylinder assembly.

[0038] A positioning mechanism 6 is provided on the transmission line 1, and the positioning mechanism 6 includes a first cylinder 61 and a guide rod 62. The first cylinder 61 is fixed in the transmission line 1, and one end of the guide rod 62 is fixed to the output end of the first cylinder 61. A positioning hole matching the guide rod 62 is provided at the bottom of the tray of the transmission line 1.

[0039] See also Figure 3 When the pallet moves on the transmission line 1, the first cylinder 61 can control the guide rod 62 to lift up. When the pallet moves to below the set shrinkage sleeve 51 or the flexible opening sleeve 41, the top of the guide rod 62 can extend into the positioning hole to achieve horizontal positioning of the pallet. When the pallet is positioned, the piston can be clamped on the transmission line 1 through the additionally installed clamping mechanisms on both sides to facilitate the removal and placement of the tapered sleeve 33, the flexible opening sleeve 41 and the shrinkage sleeve 51.

[0040] It should be noted that the clamping mechanisms on both sides can be clamps used in the mechanical field in the prior art, and their only function is to achieve the positioning of the piston to facilitate the removal and placement of the tapered sleeve 33, the flexible opening sleeve 41 and the shrinking sleeve 51. The specific structure and principle will not be repeated here.

[0041] The storage device 2 also includes a base 24, a second cylinder 25, a third cylinder 26 and a through hole 27. The through hole 27 is arranged on the surface of the base 24, the base 24 is fixed to the surface of the loading platform 23, the bottom end of the material rack 22 extends into the through hole 27, the second cylinder 25 is fixed to the top of the base 24 and the guide ring is clamped on the surface of the material rack 22 through a limiter, the third cylinder 26 is fixed to the bottom of the base 24, the bottom of the material rack 22 is concentrically arranged with one of the conical sleeves 33, the limiter includes an upper stopper 28 and a lower stopper 29, the upper stopper 28 is fixed to the output end of the second cylinder 25, the lower stopper 29 is fixed to the output end of the third cylinder 26, and in the initial state, the upper stopper 28 and the lower stopper 29 are both in an extended state.

[0042] See also Figure 4 When the guide ring is discharged, first, the second cylinder 25 clamps the guide ring on the rack 22 with the upper block 28, and the convex structure at the front end of the upper block 28 extends into the groove on the rack 22 to prevent the guide ring from falling. At this time, the third cylinder 26 and the lower block 29 are also in an extended state. When the guide ring is discharged, the second cylinder 25 and the upper block 28 retract, and the guide ring on the rack 22 as a whole drops by a distance of the height of the guide ring. The lowest guide ring enters the through hole 27, and then the second cylinder 25 and the upper block 28 extend and clamp. At this time, except for the lowest guide ring, all are pressed and blocked by the upper block 28. The third cylinder 26 and the lower block 29 retract again, and the lowest guide ring falls down, completing one discharge.

[0043] It should be noted that the material storage device 2, the feeding device 3, the flexible assembly mechanism 4 and the outer diameter reduction device 5 are all automatically controlled by PLC to achieve automatic assembly of the guide ring.

[0044] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for automatically assembling a guide ring of a hydraulic cylinder, characterized in that: It comprises a transmission line (1), a material storage device (2), a loading device (3), a flexible assembly mechanism (4) and an outer diameter reduction device (5), wherein a piston for waiting to install a guide ring is fixed on the tray of the transmission line (1); The material storage device (2) comprises a turntable (21), a material rack (22) and a loading platform (23); the turntable (21) is arranged above the loading platform (23) by being rotated by a motor, and a plurality of material racks (22) are evenly fixed on the surface of the turntable (21); The feeding device (3) comprises a collaborative robot (31), a pneumatic clamp (32) and a plurality of sets of three conical sleeves (33), wherein the pneumatic clamp (32) is arranged at the end of the collaborative robot (31), and the conical sleeve (33) is clamped and fixed by the pneumatic clamp (32); The flexible assembly mechanism (4) comprises a flexible opening sleeve (41) and a first electric cylinder (42), wherein the first electric cylinder (42) is fixed above the transmission line (1), and the flexible opening sleeve (41) is fixed to the output end of the first electric cylinder (42); The outer diameter reducing device (5) comprises a shrinking sleeve (51) and a second electric cylinder (52), wherein the second electric cylinder (52) is fixed above the transmission line (1), and the shrinking sleeve (51) is fixed to the output end of the second electric cylinder (52).

2. The device for automatically assembling a guide ring of a hydraulic cylinder according to claim 1, characterized in that: The transmission line (1) is provided with a positioning mechanism (6), the positioning mechanism (6) comprising a first cylinder (61) and a guide rod (62), the first cylinder (61) being fixed in the transmission line (1), one end of the guide rod (62) being fixed to an output end of the first cylinder (61), and a positioning hole matching the guide rod (62) being provided at the bottom of a tray of the transmission line (1).

3. The device for automatically assembling a guide ring of a hydraulic cylinder according to claim 1, characterized in that: The material storage device (2) further comprises a base (24), a second cylinder (25), a third cylinder (26) and a through hole (27); the through hole (27) is arranged on the surface of the base (24); the base (24) is fixed to the surface of the loading platform (23); the bottom end of the material rack (22) extends into the through hole (27); the second cylinder (25) is fixed to the top of the base (24) and the guide ring is clamped on the surface of the material rack (22) by a limiter; the third cylinder (26) is fixed to the bottom of the base (24); the bottom of the material rack (22) is arranged concentrically with one of the conical sleeves (33).

4. The device for automatically assembling a guide ring of a hydraulic cylinder according to claim 3, characterized in that: The limiting member comprises an upper stopper (28) and a lower stopper (29); the upper stopper (28) is fixed to the output end of the second cylinder (25), and the lower stopper (29) is fixed to the output end of the third cylinder (26); in an initial state, the upper stopper (28) and the lower stopper (29) are both in an extended state.

5. The device for automatically assembling a guide ring of a hydraulic cylinder according to claim 1, characterized in that: The flexible open sleeve (41) is in an inverted cone shape, and a plurality of notches (43) are arranged on the surface of the flexible open sleeve (41). The minimum inner diameter of the lowermost opening portion of the flexible open sleeve (41) is greater than the top outer diameter of the conical sleeve (33).

6. The device for automatically assembling a guide ring of a hydraulic cylinder according to claim 1, characterized in that: The inner wall of the bottom of the shrink sleeve (51) transitions from a conical surface to a cylindrical surface, and the inner diameter of the cylindrical surface is greater than the outer diameter of the piston.

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