Oil cylinder self-locking structure

Abstract

The utility model relates to the technical field of oil cylinders, and discloses an oil cylinder self-locking structure which comprises a first end cover and a second end cover, a sealing buffer mechanism is installed on the inner wall of the second end cover in a sliding mode, and a locking mechanism is arranged on the side face of the second end cover. The locking mechanism comprises a mounting ring, and a sliding groove is fixedly formed in the side face of the mounting ring. When the hydraulic cylinder moves to a designated position and needs to be positioned and prevented from moving backwards, the oil pump stops working, the driving motor drives the rotating ring to rotate and drives the connecting block to rotate, then the mounting ring is driven to rotate around the mounting piece, and the mounting ring rotates to drive the hinge piece to rotate, drive the connecting rod to deflect and drive the clamping block to deflect on the side face of the fixing pin. When the hydraulic pump oil cylinder retreats, the side face of the clamping block is driven to be connected with the clamping ring in a clamped mode, locking operation on the hydraulic cylinder ejector rod is completed, the ejector rod can be prevented from retreating, and the problem that in the background technology, due to retreating of the hydraulic pump oil cylinder, the position of an inclined loose core and the position of the oil cylinder are changed, and an injection molding workpiece is flashed or excessive glue is generated can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of oil cylinders, in particular to an oil cylinder self-locking structure. Background Art

[0002] A hydraulic cylinder is a hydraulic actuator that converts hydraulic energy into mechanical energy, producing linear reciprocating (or oscillating) motion. It features a simple structure and reliable operation. Reciprocating motion can be achieved without a reduction gear, and with zero transmission backlash, the cylinder offers smooth motion. Consequently, it is widely used in hydraulic systems across various machines. The cylinder's output force is proportional to the effective area of ​​the piston and the pressure differential across it. A hydraulic cylinder essentially consists of a cylinder barrel and head, a piston and piston rod, a sealing device, a buffer, and an exhaust system.

[0003] When casting the mold, some large-angle and long-stroke core pulling inevitably use cylinders to increase the power to complete the demoulding action; however, when injecting in the mold closed state, a large injection pressure will be generated in the mold cavity. This pressure will be directly applied to the oblique core pulling, causing the slider to retreat, and the force will be transferred to the cylinder, causing the oblique core pulling and the cylinder to retreat. That is, the position of the oblique core pulling and the cylinder changes due to the injection pressure, which will cause flash or excess glue on the injection molded workpiece.

[0004] For this reason, it is necessary to provide a kind of oil cylinder self-locking structure. Utility Model Content

[0005] The purpose of the utility model is to provide a self-locking structure of an oil cylinder to solve the problem proposed in the background art that the backward movement of the hydraulic pump oil cylinder causes the inclined core pulling and the position of the oil cylinder to change, which may cause flash or excess glue on the injection molded workpiece.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a self-locking structure of an oil cylinder, comprising a first end cover and a second end cover, a sealing buffer mechanism being slidably installed on the inner wall of the second end cover, and a locking mechanism being provided on the side surface of the second end cover; the locking mechanism comprises a mounting ring, a sliding groove being fixedly provided on the side surface of the mounting ring, a mounting piece being slidably installed on the inner wall of the sliding groove, an end face of the mounting piece being fixedly connected to the side surface of the second end cover, a hinge being fixedly installed on the inner wall of the mounting ring, a connecting rod being hingedly installed on the side surface of the hinge, a block being hingedly installed on the end face of the connecting rod, a sealing gasket being fixedly installed on the end face of the block, a through hole being fixedly provided on the side surface of the block, a fixing pin being rotatably installed on the inner wall of the through hole through a bearing sleeve, and the end face of the fixing pin being fixedly connected to the side surface of the second end cover through a bearing seat.

[0007] Preferably, a connecting block is fixedly mounted on the side surface of the mounting ring, a rotating ring is fixedly mounted on the end surface of the connecting block, an anti-slip ring is fixedly mounted on the side surface of the rotating ring, and a buffer pad is fixedly mounted on the end surface of the rotating ring.

[0008] Preferably, a refueling port is fixedly provided on the side of the first end cover, a pump is fixedly installed on the side of the refueling port, a cylinder is fixedly installed on the side of the first end cover, and the other end face of the cylinder is fixedly connected to the side of the second end cover.

[0009] Preferably, a through hole is fixedly opened on the side of the second end cover, and a pull rod is slidably installed on the inner wall of the through hole. A through hole is fixedly opened on the side of the first end cover, and the inner wall of the through hole is slidably connected to the side of the pull rod. Both ends of the pull rod are fastened to the sides of the first end cover and the second end cover by fastening bolts.

[0010] Preferably, the sealing buffer mechanism includes a push rod, a clamping ring is fixedly provided on the side of the push rod, the inner wall of the clamping ring is clamped and connected to the side of the clamping block, a fixing sleeve is fixedly installed on the side of the push rod, a piston is clamped and installed on the side of the push rod, and two mounting grooves are fixedly provided on the inner wall of the piston, a second sealing ring is installed in compression contact with the inner wall of the mounting groove, and a second wear-resistant ring is installed in compression contact with the inner wall of the other mounting groove.

[0011] Preferably, two mounting grooves are fixedly provided on the side of the piston, a first wear-resistant ring is installed in compression contact with the inner wall of the mounting groove, a first sealing ring is installed in compression contact with the inner wall of the other mounting groove, a limiting sleeve is clamped and installed on the side of the push rod, and a mounting plate is fixedly installed on the end face of the push rod.

[0012] Preferably, three grooves are fixedly opened on the inner wall of the second end cover, a dust ring is clamped and installed on the inner wall of the groove, a front pressure plate is fixedly installed on the inner wall of the groove, and a rear pressure plate is fixedly installed on the inner wall of the groove.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] 1) The self-locking structure of the oil cylinder. When the hydraulic cylinder moves to the specified position and needs to be positioned to prevent it from moving backward, the oil pump stops working, and further drives the rotating ring to rotate through the driving motor, further drives the connecting block to rotate, and then drives the installation ring to rotate. The further rotation of the installation ring drives the hinge to rotate, drives the connecting rod to deflect, and further drives the clamping block to deflect on the side of the fixed pin, drives the side of the clamping block to engage with the clamping ring, completing the locking operation of the hydraulic cylinder push rod, which can prevent the push rod from retreating, and can solve the problem of the inclined core pulling and the cylinder position changing due to the retreat of the hydraulic pump oil cylinder proposed in the above background technology, which will cause flash or excess glue on the injection molded workpiece.

[0015] 2) The self-locking structure of the oil cylinder, when in use, turn on the oil pump, and transmit the hydraulic oil to the refueling port and the inside of the cylinder through the transmission pipe. As the hydraulic oil increases, the hydraulic oil pushes the piston to move on the inner wall of the cylinder, and provides sealing through the first wear-resistant ring and the first sealing ring to prevent the hydraulic oil from leaking, further pushing the push rod to move. When moving, the dust ring, the front pressure plate and the rear pressure plate provide sealing for the front section of the push rod, and cooperate with the locking mechanism to push the connecting block to the specified position and maintain it, which can provide effective sealing and buffering for the hydraulic cylinder and improve the service life of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the three-dimensional structure of a self-locking structure of an oil cylinder in an embodiment of the present utility model;

[0017] Figure 2 This is a schematic diagram of the extended state of the structural top rod in the embodiment of the utility model;

[0018] Figure 3 This is a schematic diagram of the cross-sectional structure of the cylinder in the embodiment of the present utility model;

[0019] Figure 4 This is a structural diagram of the sealing and buffering mechanism in an embodiment of the present utility model;

[0020] Figure 5 This is a schematic diagram of the locking mechanism structure in an embodiment of the present utility model;

[0021] Figure 6 It is a schematic diagram of the partial structure of the locking mechanism in an embodiment of the present utility model.

[0022] In the figure: 1. first end cover; 2. oil filling port; 3. cylinder; 4. second end cover; 5. pull rod; 6. sealing and buffering mechanism; 601. dust ring; 602. front pressure plate; 603. rear pressure plate; 604. push rod; 605. clamping ring; 606. piston; 607. first wear-resistant ring; 608. first sealing ring; 609. second sealing ring; 610. second wear-resistant ring; 611. fixing sleeve; 612. limiting sleeve; 7. mounting plate; 8. locking mechanism; 801. mounting part; 802. mounting ring; 803. slide groove; 804. connecting block; 805. hinge; 806. connecting rod; 807. clamping block; 808. fixing pin; 809. sealing gasket; 810. rotating ring; 811. buffer pad. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] Example 1

[0025] Combine Figures 1-6 A self-locking structure of an oil cylinder includes a first end cover 1 and a second end cover 4. A sealing buffer mechanism 6 is slidably installed on the inner wall of the second end cover 4, and a locking mechanism 8 is provided on the side of the second end cover 4; the locking mechanism 8 includes a mounting ring 802, a sliding groove 803 is fixedly opened on the side of the mounting ring 802, a mounting member 801 is slidably installed on the inner wall of the sliding groove 803, and the end face of the mounting member 801 is fixedly connected to the side of the second end cover 4. A hinged member 805 is fixedly installed on the inner wall of the mounting ring 802, and a connecting rod 806 is hingedly installed on the side of the hinged member 805. A clamping block 807 is hingedly mounted on the end face of the rod 806, a sealing gasket 809 is fixedly mounted on the end face of the clamping block 807, a through hole is fixedly opened on the side face of the clamping block 807, a fixing pin 808 is rotatably mounted on the inner wall of the through hole via a bearing sleeve, the end face of the fixing pin 808 is fixedly connected to the side face of the second end cover 4 via a bearing seat, a connecting block 804 is fixedly mounted on the side face of the mounting ring 802, a rotating ring 810 is fixedly mounted on the end face of the connecting block 804, an anti-slip ring is fixedly mounted on the side face of the rotating ring 810, and a buffer pad 811 is fixedly mounted on the end face of the rotating ring 810;

[0026] Specifically, when the hydraulic cylinder moves to the specified position and needs to be positioned to prevent backward movement, the oil pump stops working, and further drives the rotating ring 810 to rotate through the driving motor, further drives the connecting block 804 to rotate, and then drives the mounting ring 802 to rotate around the mounting part 801. Further rotation of the mounting ring 802 drives the hinge part 805 to rotate, drives the connecting rod 806 to deflect, and further drives the clamping block 807 to deflect on the side of the fixing pin 808, drives the side of the clamping block 807 to engage with the clamping ring 605, completes the locking operation of the hydraulic cylinder push rod 604, and can prevent the push rod 604 from retreating.

[0027] Example 2

[0028] See Figures 1-6, it is further obtained that the side of the first end cover 1 is fixedly provided with a fuel filling port 2, the side of the fuel filling port 2 is fixedly installed with a pump, the side of the first end cover 1 is fixedly installed with a cylinder 3, the other end face of the cylinder 3 is fixedly connected to the side of the second end cover 4, the side of the second end cover 4 is fixedly provided with a through hole, the inner wall of the through hole is slidably installed with a pull rod 5, the side of the first end cover 1 is fixedly provided with a through hole, the inner wall of the through hole is slidably connected to the side of the pull rod 5, both ends of the pull rod 5 are fastened to the side of the first end cover 1 and the second end cover 4 by fastening bolts, the sealing buffer mechanism 6 includes a push rod 604, the side of the push rod 604 is fixedly provided with a clamping ring 605, the inner wall of the clamping ring 605 is clamped and connected to the side of the clamping block 807, the side of the push rod 604 is fixedly provided with a fixing sleeve 611, the push rod 60 4. A piston 606 is fixedly mounted on the side thereof, and two mounting grooves are fixedly provided on the inner wall of the piston 606. A second sealing ring 609 is installed on the inner wall of the mounting groove in extrusion contact, and a second wear-resistant ring 610 is installed on the inner wall of the other mounting groove in extrusion contact. Two mounting grooves are fixedly provided on the side thereof, and a first wear-resistant ring 607 is installed on the inner wall of the mounting groove in extrusion contact, and a first sealing ring 608 is installed on the inner wall of the other mounting groove in extrusion contact. A limiting sleeve 612 is fixedly mounted on the side of the ejector pin 604, and a mounting plate 7 is fixedly mounted on the end face of the ejector pin 604. Three grooves are fixedly provided on the inner wall of the second end cover 4, and a dust ring 601 is fixedly mounted on the inner wall of the groove. A front pressure plate 602 is fixedly mounted on the inner wall of the groove, and a rear pressure plate 603 is fixedly mounted on the inner wall of the groove.

[0029] Specifically, when in use, turn on the oil pump and transmit the hydraulic oil to the refueling port 2 and the inside of the cylinder 3 through the transmission pipe. As the hydraulic oil increases, the hydraulic oil pushes the piston 606 to move on the inner wall of the cylinder 3, and provides sealing through the first wear-resistant ring 607 and the first sealing ring 608 to prevent the hydraulic oil from leaking, further pushing the push rod 604 to move. When moving, the dust ring 601, the front pressure plate 602 and the rear pressure plate 603 provide sealing for the front section of the push rod 604, and cooperate with the locking mechanism 8 to push the mounting plate 7 to the specified position and maintain it, which can provide effective sealing and buffering for the hydraulic cylinder and improve the service life of the device.

[0030] Although the embodiments of the present invention have been shown and described, it will be understood 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 the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A self-locking structure of an oil cylinder, comprising a first end cover (1) and a second end cover (4), characterized in that: A sealing buffer mechanism (6) is slidably mounted on the inner wall of the second end cover (4), and a locking mechanism (8) is provided on the side of the second end cover (4); The locking mechanism (8) comprises a mounting ring (802), a sliding groove (803) is fixedly provided on the side of the mounting ring (802), a mounting member (801) is slidably installed on the inner wall of the sliding groove (803), an end face of the mounting member (801) is fixedly connected to the side of the second end cover (4), a hinged member (805) is fixedly provided on the inner wall of the mounting ring (802), a connecting rod (806) is hingedly provided on the side of the hinged member (805), a clamping block (807) is hingedly provided on the end face of the connecting rod (806), a sealing gasket (809) is fixedly provided on the end face of the clamping block (807), a through hole is fixedly provided on the side of the clamping block (807), a fixing pin (808) is rotatably installed on the inner wall of the through hole through a bearing sleeve, and an end face of the fixing pin (808) is fixedly connected to the side of the second end cover (4) through a bearing seat.

2. The oil cylinder self-locking structure according to claim 1, characterized in that: A connecting block (804) is fixedly mounted on the side of the mounting ring (802), a rotating ring (810) is fixedly mounted on the end face of the connecting block (804), an anti-slip ring is fixedly mounted on the side of the rotating ring (810), and a buffer pad (811) is fixedly mounted on the end face of the rotating ring (810).

3. The oil cylinder self-locking structure according to claim 1, characterized in that: A refueling port (2) is fixedly provided on the side of the first end cover (1), a pump is fixedly installed on the side of the refueling port (2), a cylinder (3) is fixedly installed on the side of the first end cover (1), and the other end surface of the cylinder (3) is fixedly connected to the side of the second end cover (4).

4. The oil cylinder self-locking structure according to claim 1, characterized in that: A through hole is fixedly provided on the side of the second end cover (4), and a pull rod (5) is slidably installed on the inner wall of the through hole. A through hole is fixedly provided on the side of the first end cover (1), and the inner wall of the through hole is slidably connected to the side of the pull rod (5). Both ends of the pull rod (5) are fastened to the sides of the first end cover (1) and the second end cover (4) by fastening bolts.

5. The oil cylinder self-locking structure according to claim 1, characterized in that: The sealing buffer mechanism (6) comprises a push rod (604), a clamping ring (605) is fixedly provided on the side of the push rod (604), the inner wall of the clamping ring (605) is clamped and connected to the side of the clamping block (807), a fixing sleeve (611) is fixedly installed on the side of the push rod (604), a piston (606) is clamped and installed on the side of the push rod (604), and two mounting grooves are fixedly provided on the inner wall of the piston (606), a second sealing ring (609) is installed in compression contact with the inner wall of the mounting groove, and a second wear-resistant ring (610) is installed in compression contact with the inner wall of the other mounting groove.

6. The oil cylinder self-locking structure according to claim 5, characterized in that: Two mounting grooves are fixedly provided on the side of the piston (606), a first wear-resistant ring (607) is installed in compression contact with the inner wall of the mounting groove, and a first sealing ring (608) is installed in compression contact with the inner wall of the other mounting groove. A limiting sleeve (612) is clamped and installed on the side of the push rod (604), and a mounting plate (7) is fixedly installed on the end surface of the push rod (604).

7. The oil cylinder self-locking structure according to claim 1, characterized in that: The inner wall of the second end cover (4) is fixedly provided with three grooves, a dust ring (601) is clamped and installed on the inner wall of the groove, a front pressure plate (602) is fixedly installed on the inner wall of the groove, and a rear pressure plate (603) is fixedly installed on the inner wall of the groove.

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