Piston rod locking mechanism and pressing oil cylinder

Abstract

The utility model relates to the technical field of hydraulic cylinders, and discloses a piston rod locking mechanism, which comprises a base, a piston rod and a piston rod, the piston rod is sleeved with the first connecting ring, a cushion layer is fixedly connected to the side, close to the piston rod, of the first connecting ring, and the first connecting ring is formed by oppositely buckling a pair of first connecting half rings; the second connecting ring is formed by oppositely buckling a pair of second connecting semi-rings, the second connecting semi-rings are provided with connecting pieces, the pair of second connecting rings are detachably connected through the connecting pieces, the connecting pieces are detachably connected with the base, and the second connecting rings are connected with the first connecting ring; the first connecting ring abuts against the base, and the two cushion layers abut against the piston rod in the opposite direction. The influence of the locking mechanism on the cylinder body structure can be reduced, and the piston rod is convenient to maintain and replace.

Description

TECHNICAL FIELD

[0001] The utility model relates to hydraulic cylinder technical field especially is a kind of piston rod locking mechanism and pressing oil cylinder. BACKGROUND

[0002] Hydraulic oil cylinder is usually combined with piston rod to transmit pressure, and is commonly used in processes such as forging, stamping and pressing. When pressing, the oil cylinder needs to maintain a long-term tightening force, so a locking mechanism is usually provided for the piston rod to fix the piston rod and prevent it from retracting into the cylinder barrel.

[0003] In the prior art patent No. CN221462657U, a locking hydraulic cylinder is provided by opening a tooth groove on the piston rod and sleeving an outer cylinder on the piston rod. The tooth plate elastically arranged in the outer cylinder is engaged with the piston rod to lock the piston rod. However, the outer cylinder and the cylinder barrel need to be fixed to install several tooth plates along the axial direction of the piston rod, which makes it difficult to disassemble the outer cylinder and other structures when replacing and maintaining the piston rod, resulting in low replacement efficiency. In addition, the tooth groove on the piston rod structure also reduces the structural strength of the piston rod, making it more prone to damage and affecting the use effect of the oil cylinder. Therefore, there is an urgent need for a pressing oil cylinder equipped with a locking mechanism to solve the above problems. SUMMARY

[0004] The utility model aims to provide a piston rod locking mechanism and a pressing oil cylinder to solve the problems of the prior art and to reduce the impact of the locking mechanism on the cylinder structure, facilitating maintenance and replacement of the piston rod.

[0005] To achieve the above-mentioned purpose, the utility model provides the following scheme: the utility model provides a piston rod locking mechanism, comprising:

[0006] a base for fixedly connecting to the cylinder body;

[0007] a first connecting ring sleeved on the piston rod, the first connecting ring having a pad layer fixedly connected to one side of the piston rod, and the first connecting ring being composed of a pair of first connecting half-rings that are oppositely buckled;

[0008] a second connecting ring composed of a pair of second connecting half-rings that are oppositely buckled, the second connecting half-rings being provided with connecting pieces, a pair of the second connecting rings being detachably connected to each other through the connecting pieces, the connecting pieces being detachably connected to the base, and the second connecting rings being connected to the first connecting ring so that the first connecting ring abuts against the base and the two pads abut against the piston rod in opposite directions.

[0009] Preferably, the first connecting ring has a frustum-shaped structure, with the larger diameter end of the first connecting ring facing the base. The second connecting ring has a groove inside, and a through hole is formed at the top of the groove. The diameter of the through hole is larger than the smaller diameter end of the first connecting ring and smaller than the larger diameter end of the first connecting ring.

[0010] Preferably, the side bevel of the first connecting ring extends inward with an arc-shaped recess.

[0011] Preferably, the connector includes:

[0012] Several retaining rings are sequentially fixed along the same axis to the adjacent sides of a pair of second connecting half rings, and any two adjacent retaining rings are respectively fixed to different second connecting half rings;

[0013] A connecting bolt is inserted between several of the retaining rings, and the connecting bolt is threadedly connected to the base.

[0014] Preferred options also include:

[0015] An adjustment pad, a layered structure with adjustable thickness, is used to fill the space between the first connecting ring and the base.

[0016] Preferably, one end of the first connecting half-ring is fixedly connected to an insert, and the other end of the first connecting half-ring is provided with a groove, and the inserts on the adjacent sides of a pair of first connecting half-rings slide into the adjacent grooves.

[0017] Preferably, an air hole is provided on the end of the first connecting half-ring away from the base, and the air hole communicates with the groove.

[0018] A clamping cylinder, comprising:

[0019] A cylinder body, with a piston rod movably fitted at its front end;

[0020] In the piston rod locking mechanism described above, the base is sleeved on the cylinder body near the piston rod end, and the base is fixedly connected to the cylinder body.

[0021] The present invention discloses the following technical effects:

[0022] This invention features a first connecting ring fitted onto the piston rod, formed by a pair of first connecting half-rings interlocking. Separating the pair of first connecting half-rings allows the first connecting ring to be detached from the piston rod. Simultaneously, a second connecting ring is formed by a pair of second connecting half-rings engaging. A connecting member is provided on the second connecting half-rings, allowing for a detachable connection between the pair of second connecting half-rings. Furthermore, the connecting member is detachably connected to the base. Therefore, when disassembling the second connecting ring from the base, the pair of second connecting half-rings can also be disassembled from each other, facilitating the separation of the second connecting ring from the piston rod. This reduces the obstruction of the locking mechanism on the cylinder piston rod and facilitates the disassembly of the overall locking mechanism when replacing or maintaining the piston rod.

[0023] Furthermore, by connecting the second connecting ring to the first connecting ring, the first connecting ring abuts against the base, and the pad on the first connecting ring abuts against the side wall of the piston rod, thereby locking the piston rod and ensuring the stability of the piston rod. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Fig. 1 This is a diagram showing the positional relationship between the piston rod and the base in this utility model;

[0026] Fig. 2 This is an exploded view of the structure of the first connecting ring and the second connecting ring in this utility model;

[0027] Fig. 3 This is a diagram showing the connection relationship between the retaining rings between a pair of second connecting half-rings in this utility model;

[0028] Among them, 1. First connecting ring; 11. First connecting half ring; 12. Pad; 13. Insert; 14. Air hole; 2. Second connecting ring; 21. Second connecting half ring; 22. Snap ring; 23. Groove; 24. Through hole; 3. Piston rod; 4. Base; 5. Cylinder body; 6. Connecting bolt; 7. Adjusting pad. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0031] Reference Figs. 1-3 This utility model provides a piston rod locking mechanism, comprising:

[0032] Base 4 is used to be fixed to cylinder 5;

[0033] The first connecting ring 1 is sleeved on the piston rod 3. A pad 12 is fixed to the side of the first connecting ring 1 near the piston rod 3. The first connecting ring 1 is formed by a pair of first connecting half rings 11 being fastened to each other.

[0034] The second connecting ring 2 is formed by a pair of second connecting half rings 21 fastening to each other. A connector is provided on the second connecting half ring 21. The pair of second connecting rings 2 are detachably connected to each other through the connector, and the connector is detachably connected to the base 4. The second connecting ring 2 is connected to the first connecting ring 1 so that the first connecting ring 1 abuts against the base 4, and the two pads 12 abut against the piston rod 3 in opposite directions.

[0035] This invention features a first connecting ring 1 fitted onto the piston rod 3. The first connecting ring 1 is formed by a pair of first connecting half rings 11 that are fastened together. The first connecting ring 1 can be disassembled from the piston rod 3 by separating the pair of first connecting half rings 11. At the same time, a pair of second connecting half rings 21 cooperate to form a second connecting ring 2. A connecting member is provided on the second connecting half rings 21, which allows the pair of second connecting half rings 21 to be detachably connected. In addition, the connecting member is detachably connected to the base 4. Thus, when the second connecting ring 2 is disassembled from the base 4, the pair of second connecting half rings 21 can also be disassembled from each other, making it convenient to separate the second connecting ring 2 from the piston rod 3. This reduces the obstruction of the locking mechanism on the piston rod 3 of the cylinder 5 and facilitates the disassembly of the overall locking mechanism when replacing or maintaining the piston rod 3.

[0036] Furthermore, by connecting the second connecting ring 2 to the first connecting ring 1, the first connecting ring 1 abuts against the base 4, and the pad 12 on the first connecting ring 1 abuts against the side wall of the piston rod 3, thereby locking the piston rod 3 and ensuring the stability of the piston rod 3.

[0037] Specifically, the pad 12 is made of metal and is integrally formed and fixed to the first connecting half ring 11.

[0038] Furthermore, the first connecting ring 1 has a frustum structure, with the larger diameter end of the first connecting ring 1 facing the base 4. The second connecting ring 2 has a groove 23 inside, and a through hole 24 is provided at the top of the groove 23. The diameter of the through hole 24 is larger than the smaller diameter end of the first connecting ring 1 and smaller than the larger diameter end of the first connecting ring 1.

[0039] The second connecting ring 2 is fitted with a groove 23 inside the first connecting ring 1, and the smaller diameter end of the first connecting ring 1 is inserted into the through hole 24. When the second connecting ring 2 is connected and fixed to the base 4, the through hole 24 presses against the side wall of the first connecting ring 1, thereby pressing the pair of first connecting half rings 11 against each other, enhancing the contact force between the pad 12 and the piston rod 3, and achieving stable fixing of the piston rod 3.

[0040] Furthermore, the side bevel of the first connecting ring 1 extends inward with an arc-shaped recess.

[0041] The inner wall of the through hole 24 of the second connecting ring 2 slides into contact with the arc-shaped groove 23, creating a smooth transition. Under the squeezing force of the second connecting ring 2, a pair of first connecting half rings 11 move closer to each other to clamp the piston rod 3, thereby locking the piston rod 3.

[0042] Furthermore, the connector includes:

[0043] Several retaining rings 22 are successively fixed along the same axis to the adjacent sides of a pair of second connecting half rings 21, and any two adjacent retaining rings 22 are respectively fixed to different second connecting half rings 21.

[0044] The connecting bolt 6 is inserted between several retaining rings 22 and is threadedly connected to the base 4.

[0045] Several retaining rings 22 are fixed to a pair of second connecting half-rings 21 in an alternating sequence, so that the pair of second connecting half-rings 21 are connected by several retaining plates. The connecting bolts 6 pass through several retaining rings 22 to fix the second connecting half-rings 21 and keep the size of the through hole 24 fixed. During the process of the connecting bolts 6 being threaded to the base 4, the through hole 24 moves along the direction of the base 4, thereby sliding into contact with the first connecting half-ring 11, and gradually causing the pad 12 to abut against the piston rod 3 to lock.

[0046] Furthermore, it also includes:

[0047] The adjusting pad 7 is a layer structure with adjustable thickness, used to fill the space between the first connecting ring 1 and the base 4.

[0048] By filling the adjusting pad 7 on the side of the first connecting ring 1 near the base 4 and fitting the adjusting pad 7 onto the piston rod 3, the first connecting ring 1 can be tightly connected to the base 4.

[0049] Specifically, the adjusting pad 7 is preferably, but not limited to, made of rubber, and has a notch on one side to facilitate removal from the piston rod 3.

[0050] Furthermore, one end of the first connecting half-ring 11 is fixedly connected to an insert 13, and the other end of the first connecting half-ring 11 is provided with an insert groove, and the inserts 13 on the adjacent sides of a pair of first connecting half-rings 11 slide into the adjacent insert groove.

[0051] By utilizing the interlocking of the insert 13 and the groove, a pair of first connecting half rings 11 can be interlocked, improving the structural stability of the first connecting ring 1. During the process of the second connecting ring 2 pressing the first connecting ring 1, the insert 13 extends into the adjacent groove, thereby reducing the possibility of misalignment and sliding between the pair of first connecting half rings 11 and improving the locking effect of the pad 12 on the piston rod 3.

[0052] Furthermore, an air hole 14 is provided on the end of the first connecting half-ring 11 away from the base 4, and the air hole 14 is connected to the groove.

[0053] A clamping cylinder, comprising:

[0054] Cylinder 5, with piston rod 3 movably fitted at the front end of cylinder 5;

[0055] The aforementioned piston rod 3 locking mechanism has a base 4 sleeved on the cylinder body 5 near the piston rod 3, and the base 4 is fixedly connected to the cylinder body 5.

[0056] The base 4 is designed as a ring structure with threaded holes on the opposite side, which facilitates the connection of the connecting bolt 6 to the threaded hole. When replacing the piston rod 3, the first connecting ring 1, the second connecting ring 2, and the adjusting pad 7 can be disassembled relative to the piston rod 3, making disassembly and maintenance convenient.

[0057] The working principle of the piston rod 3 locking mechanism and the clamping cylinder of this utility model:

[0058] When it is necessary to lock the piston rod 3, firstly, fasten a pair of first connecting half rings 11 opposite each other on both sides of the piston rod 3, and insert the insert 13 into the corresponding groove to form the first connecting ring 1. Then, fill the space between the first connecting ring 1 and the base 4 with an adjusting pad 7, and slip the adjusting pad 7 onto the piston rod 3 through the notch. Press the first connecting ring 1 towards the base 4, and then attach a pair of second connecting half rings 21 to the first connecting ring 1. Align the corresponding retaining rings 22 on the pair of second connecting half rings 21 with the same axis, pass the connecting bolt 6 through the two retaining rings 22, and align the connecting bolt 6 with the threaded hole on the base 4. Tighten the connecting bolt 6 to fix the second connecting half ring 21 to the base 4. During the tightening of the second connecting half ring 21, the through hole 24 of the second connecting ring 2 squeezes the first connecting ring 1, causing the pad 12 to press against the piston rod 3, thereby locking the piston rod 3.

[0059] When it is necessary to replace or disassemble the piston rod 3, simply rotate the connecting bolt 6 in the opposite direction. After the connecting bolt 6 slides away from several retaining rings 22, first disassemble the second connecting half ring 21 in the opposite direction, then disassemble a pair of first connecting half rings 11, and finally remove the adjusting pad 7.

[0060] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0061] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A piston rod locking mechanism, characterized in that, include: The base (4) is used to fix it to the cylinder body (5); The first connecting ring (1) is sleeved on the piston rod (3). A pad (12) is fixed to the side of the first connecting ring (1) near the piston rod (3). The first connecting ring (1) is formed by a pair of first connecting half rings (11) fastening to each other. The second connecting ring (2) is formed by a pair of second connecting half rings (21) fastened together. A connector is provided on the second connecting half ring (21). The pair of second connecting rings (2) are detachably connected to each other through the connector, and the connector is detachably connected to the base (4). The second connecting ring (2) pushes the first connecting ring (1) so that the pad (12) abuts against the piston rod (3) in the opposite direction.

2. The piston rod locking mechanism according to claim 1, characterized in that: The first connecting ring (1) has a frustum structure. The larger diameter end of the first connecting ring (1) faces the base (4). The second connecting ring (2) has a groove (23) inside. The top of the groove (23) has a through hole (24). The diameter of the through hole (24) is larger than the smaller diameter end of the first connecting ring (1) and smaller than the larger diameter end of the first connecting ring (1).

3. The piston rod locking mechanism according to claim 1, characterized in that: The first connecting ring (1) has an arc-shaped recess extending inward from its side bevel.

4. The piston rod locking mechanism according to claim 1, characterized in that, The connector includes: Several retaining rings (22) are successively fixed along the same axis to the adjacent sides of a pair of second connecting half rings (21), and any two adjacent retaining rings (22) are respectively fixed to different second connecting half rings (21); A connecting bolt (6) is inserted between several of the retaining rings (22), and the connecting bolt (6) is threadedly connected to the base (4).

5. The piston rod locking mechanism according to claim 1, characterized in that, Also includes: An adjusting pad (7), made of a compressible elastic material, is used to fill the space between the first connecting ring (1) and the base (4).

6. The piston rod locking mechanism according to claim 1, characterized in that: One end of the first connecting half ring (11) is fixedly connected to an insert (13), and the other end of the first connecting half ring (11) is provided with a groove. The inserts (13) on the adjacent sides of a pair of first connecting half rings (11) slide into the adjacent groove.

7. The piston rod locking mechanism according to claim 6, characterized in that: The first connecting half-ring (11) has an air hole (14) on one end away from the base (4), and the air hole (14) is connected to the groove.

8. A clamping cylinder, characterized in that, include: Cylinder (5), the front end of which is movably fitted with a piston rod (3); The piston rod (3) locking mechanism according to any one of claims 1-7, wherein the base (4) is sleeved on one end of the cylinder (5) near the piston rod (3), and the base (4) is fixedly connected to the cylinder (5).

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