Hydraulic cylinder piston rod with locking structure

Abstract

The utility model discloses a hydraulic cylinder piston rod with a locking structure, and relates to the technical field of hydraulic cylinder piston rods, the hydraulic cylinder piston rod comprises a hydraulic cylinder body and a piston rod body, one side of the hydraulic cylinder body is provided with the locking mechanism, the locking mechanism is sleeved on the outer wall of the piston rod body, the top of the locking mechanism is fixedly connected with a connecting cover, and the connecting cover is fixedly connected with the hydraulic cylinder body. Limiting holes are formed in the inner wall of the circumference of the connecting cover at equal intervals, telescopic grooves are formed in one side of the outer wall of the circumference of the hydraulic cylinder body at equal intervals, limiting rods matched with the limiting holes are slidably arranged on the inner walls of the telescopic grooves, and limiting springs are fixedly connected between the limiting rods and the telescopic grooves. According to the utility model, the locking mechanism can be conveniently and quickly replaced.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic cylinder piston rod technology, and in particular to a hydraulic cylinder piston rod with a locking structure. Background Technology

[0002] A hydraulic cylinder consists of a cylinder barrel, cylinder head, piston, piston rod, sealing device, buffer device, and venting device. The piston rod connects to the piston and transmits motion. The cylinder barrel and cylinder head form a space to contain hydraulic oil, which the piston divides into two chambers. During operation, the hydraulic cylinder piston rod is typically equipped with a locking mechanism. The locking mechanism is designed to keep the hydraulic cylinder stationary under specific conditions.

[0003] CN211314729U discloses a locking structure for a hydraulic cylinder piston rod, including a first cylinder head and a second cylinder head that mate with the outer ring of the piston rod. An elastic clamping sleeve is fitted between the first and second cylinder heads, along the outer ring of the piston rod. The outer ring of the clamping sleeve is clearance-fitted with the inner ring of a conical sleeve. One end face of the conical sleeve is sealed with the inner stepped circle of the first cylinder head, and the other end of the conical sleeve abuts against one end of a disc spring assembly. The other end of the disc spring assembly abuts against the inner side of the second cylinder head. A cylinder barrel with an oil hole is also fitted along the outer ring of the conical sleeve. One end of the cylinder barrel is fixedly connected to the second cylinder head, and the other end of the cylinder barrel is fixedly connected to the first cylinder head. This utility model has a simple structure and is easy to use. Through a flexible oil supply method, the disc spring assembly can extend and retract arbitrarily, thereby achieving the clamping or releasing of the conical sleeve against the clamping sleeve. This allows the piston rod to be locked or reciprocated at any position, effectively meeting customer needs.

[0004] However, the piston rod of a hydraulic cylinder with a locking structure, as described above, is installed inside the cylinder body. When the locking structure is damaged, the entire cylinder body needs to be disassembled and replaced, which is a rather cumbersome operation. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a hydraulic cylinder piston rod with a locking structure.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A hydraulic cylinder piston rod with a locking structure includes a hydraulic cylinder body and a piston rod body. A locking mechanism is provided on one side of the hydraulic cylinder body. The locking mechanism is sleeved on the outer wall of the piston rod body. A connecting cover is fixedly connected to the top of the locking mechanism. Limiting holes are evenly spaced on the inner circumference of the connecting cover. A telescopic groove is evenly spaced on one side of the outer circumference of the hydraulic cylinder body. A limiting rod adapted to the limiting holes is slidably arranged on the inner wall of the telescopic groove. A limiting spring is fixedly connected between the limiting rod and the telescopic groove.

[0008] The present invention is further configured such that a threaded groove is formed on the outer circumference of the hydraulic cylinder body, and a threaded ring is threadedly connected to the outer wall of the hydraulic cylinder body through the threaded groove. A push ring is fixedly connected to one side of the threaded ring, and the inner circumference of the push ring is designed to be inclined.

[0009] The present invention is further configured such that a retaining ring is fixedly connected to one side of the pushing ring.

[0010] The present invention is further configured such that the side of the limiting rod away from the limiting spring is designed to be inclined.

[0011] The present invention is further configured such that the locking mechanism includes a connecting housing sleeved on the outer wall of the piston rod, the connecting housing having a movable groove inside, the movable groove having a movable opening on its inner circumferential wall, the movable opening having a clamping sleeve on its inner wall, and a locking block being slidably disposed on the inner wall of the movable opening, the locking block and the clamping sleeve having an inclined design on their respective sides.

[0012] The present invention is further configured such that the locking mechanism includes a protective shell fixedly connected to the outer circumferential wall of the connecting housing, an mounting plate fixedly connected to the top inner wall of the protective shell, and a drive motor fixedly connected to one side of the mounting plate.

[0013] The present invention is further configured such that the output shaft of the drive motor is fixedly connected to a threaded screw, a slider is slidably provided on the outer wall of the threaded screw through the thread, a connecting block is fixedly connected to the bottom of the slider, a limit opening is opened on the top inner wall of the movable groove, and the connecting block is slidably disposed in the limit opening.

[0014] The beneficial effects of this utility model are as follows:

[0015] 1. When the locking mechanism of the hydraulic cylinder piston rod with locking structure needs to be replaced, multiple limit rods can be pressed to retract the limit rods into the telescopic groove. Then, the locking mechanism and connecting housing can be removed to disassemble the locking mechanism. During installation, the limit hole is aligned with the limit rod, and then the connecting cover is put on the outer wall of the hydraulic cylinder body so that the limit rod passes through the limit hole to complete the installation of the locking mechanism. The operation is simple and convenient for replacing the locking mechanism.

[0016] 2. When disassembling the locking mechanism of the hydraulic cylinder piston rod with a locking structure, the threaded ring can be rotated first, driving the push ring to move. The inclined surface of the push ring pushes the limit rod to retract. At this time, the locking mechanism and the connecting cover can be quickly removed. The inclined surface of the limit rod can prevent the thickness of the connecting cover from contacting the limit rod and causing disassembly inconvenience. The same principle applies during installation. The threaded ring drives the limit rod to retract into the telescopic groove. Then, the connecting cover is placed on the outer wall of the hydraulic cylinder body. The threaded ring is reversed, driving the push ring to release the limit rod and simultaneously push the connecting cover, which can be quickly installed, further facilitating the replacement of the locking mechanism.

[0017] 3. In use, the piston rod of the hydraulic cylinder with locking structure is driven by the drive motor to rotate the threaded screw, and the locking block is driven to move through the limit port and connecting block. The inclined surface of the locking block pushes the inclined surface of the clamping sleeve, thereby quickly locking the piston rod with the clamping sleeve. There is no need to connect it to the hydraulic cylinder body through oil pressure, making replacement more convenient. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the piston rod of a hydraulic cylinder with a locking structure proposed in this utility model.

[0019] Figure 2 This is a partial three-dimensional structural diagram of a hydraulic cylinder piston rod connecting cover with a locking structure and a limiting hole proposed in this utility model;

[0020] Figure 3 This is a partial side cross-sectional view of the piston rod limiting rod and limiting spring of a hydraulic cylinder with a locking structure proposed in this utility model.

[0021] Figure 4 This is a partial front sectional view of the piston rod push ring and threaded ring of a hydraulic cylinder with a locking structure proposed in this utility model.

[0022] Figure 5 This is a partial front sectional view of a hydraulic cylinder piston rod locking mechanism with a locking structure proposed in this utility model.

[0023] In the diagram: 1. Hydraulic cylinder body; 2. Piston rod body; 3. Locking mechanism; 301. Connecting housing; 302. Movable groove; 303. Movable opening; 304. Locking block; 305. Clamping sleeve; 306. Protective housing; 307. Drive motor; 308. Mounting plate; 309. Threaded screw; 310. Slider; 311. Limiting port; 312. Connecting block; 4. Threaded ring; 5. Limiting rod; 6. Threaded groove; 7. Telescopic groove; 8. Limiting spring; 9. Limiting hole; 10. Push ring; 11. Retaining ring; 12. Connecting cover. Detailed Implementation

[0024] The technical solution of this patent will be further described in detail below with reference to specific embodiments.

[0025] The embodiments of this patent are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this patent, and should not be construed as limiting this patent.

[0026] In the description of this patent, it should be understood that the terms “center,” “upper,” “lower,” “front,” “back,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” and “outer,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this patent and simplifying the description, 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 patent.

[0027] In the description of this patent, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection or setting, a detachable connection or setting, or an integral connection or setting. Those skilled in the art can understand the specific meaning of the above terms in this patent according to the specific circumstances.

[0028] Reference Figures 1-3 A hydraulic cylinder piston rod with a locking structure includes a hydraulic cylinder body 1 and a piston rod body 2. A locking mechanism 3 is provided on one side of the hydraulic cylinder body 1. The locking mechanism 3 is sleeved on the outer wall of the piston rod body 2. A connecting cover 12 is fixedly connected to the top of the locking mechanism 3. Limiting holes 9 are opened at equal intervals on the inner circumference of the connecting cover 12. A telescopic groove 7 is opened at equal intervals on one side of the outer circumference of the hydraulic cylinder body 1. A limiting rod 5 adapted to the limiting hole 9 is slidably provided on the inner wall of the telescopic groove 7. A limiting spring 8 is fixedly connected between the limiting rod 5 and the telescopic groove 7.

[0029] Reference Figure 2 and Figure 4The outer circumferential wall of the hydraulic cylinder body 1 is provided with a threaded groove 6. A threaded ring 4 is threadedly connected to the outer wall of the hydraulic cylinder body 1 through the threaded groove 6. A push ring 10 is fixedly connected to one side of the threaded ring 4. The inner circumferential wall of the push ring 10 is inclined. The threaded ring 4 and the threaded groove 6 facilitate the movement of the push ring 10. A retaining ring 11 is fixedly connected to one side of the push ring 10. The inclined surface of the push ring 10 facilitates the retraction of the limit rod 5. The retaining ring 11 protects the limit rod 5. The side of the limit rod 5 away from the limit spring 8 is inclined. The inclined design facilitates the retraction of the limit rod 5 by the connecting cover 12 when the connecting cover 12 is disassembled, and avoids the limit rod 5 blocking the disassembly of the connecting cover 12 due to the thickness of the limit hole 9.

[0030] Reference Figure 1 and Figure 5 The locking mechanism 3 includes a connecting housing 301 sleeved on the outer wall of the piston rod 2. The connecting housing 301 has a movable groove 302 inside. The inner circumferential wall of the movable groove 302 has a movable opening 303. A clamping sleeve 305 is provided on the inner wall of the movable opening 303. A locking block 304 is slidably disposed on the inner wall of the movable opening 303. The sides of the locking block 304 and the clamping sleeve 305 that are close to each other are both inclined. The locking block 304 and the clamping sleeve 305 facilitate locking the piston rod 2. The locking mechanism 3 also includes a protective housing 306 fixedly connected to the outer circumferential wall of the connecting housing 301. A mounting plate 308 is fixedly connected to the top inner wall of 306. A drive motor 307 is fixedly connected to one side of the mounting plate 308. The protective housing 306 facilitates the protection of internal components. A threaded screw 309 is fixedly connected to the output shaft of the drive motor 307. A slider 310 is slidably provided on the outer wall of the threaded screw 309 through the thread. A connecting block 312 is fixedly connected to the bottom of the slider 310. A limit opening 311 is opened on the top inner wall of the movable groove 302. The connecting block 312 is slidably provided in the limit opening 311. The threaded screw 309 and the slider 310 facilitate the movement of the locking block 304.

[0031] Working principle: When the locking mechanism 3 needs to be replaced, the threaded ring 4 can be rotated first. The threaded ring 4 drives the push ring 10 to move. The inclined surface of the push ring 10 pushes the limit rod 5 to retract. At this time, the locking mechanism 3 and the connecting cover 12 can be quickly removed. The inclined surface of the limit rod 5 can prevent the thickness of the connecting cover 12 from contacting the limit rod 5 and causing inconvenience in disassembly. The same principle applies during installation. The threaded ring 4 drives the limit rod 5 to retract into the telescopic groove 7. Then, the connecting cover 12 is put on the outer wall of the hydraulic cylinder body 1. The threaded ring 4 is reversed. The threaded ring 4 drives the push ring 10 to release the limit of the limit rod 5. At the same time, the connecting cover 12 is pushed, which can quickly install the connecting cover 12 and facilitate the replacement of the locking mechanism 3.

[0032] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A hydraulic cylinder piston rod with a locking structure, comprising a hydraulic cylinder body (1) and a piston rod body (2), characterized in that, A locking mechanism (3) is provided on one side of the hydraulic cylinder body (1). The locking mechanism (3) is sleeved on the outer wall of the piston rod body (2). A connecting cover (12) is fixedly connected to the top of the locking mechanism (3). Limiting holes (9) are opened at equal intervals on the inner circumference of the connecting cover (12). A telescopic groove (7) is opened at equal intervals on one side of the outer circumference of the hydraulic cylinder body (1). A limiting rod (5) that matches the limiting hole (9) is slidably provided on the inner wall of the telescopic groove (7). A limiting spring (8) is fixedly connected between the limiting rod (5) and the telescopic groove (7).

2. The hydraulic cylinder piston rod with a locking structure according to claim 1, characterized in that, The outer circumferential wall of the hydraulic cylinder body (1) is provided with a threaded groove (6), and a threaded ring (4) is threadedly connected to the outer wall of the hydraulic cylinder body (1) through the threaded groove (6). A push ring (10) is fixedly connected to one side of the threaded ring (4), and the inner circumferential wall of the push ring (10) is designed to be inclined.

3. A hydraulic cylinder piston rod with a locking structure according to claim 2, characterized in that, A retaining ring (11) is fixedly connected to one side of the push ring (10).

4. A hydraulic cylinder piston rod with a locking structure according to claim 3, characterized in that, The side of the limiting rod (5) away from the limiting spring (8) is designed to be inclined.

5. A hydraulic cylinder piston rod with a locking structure according to claim 1, characterized in that, The locking mechanism (3) includes a connecting housing (301) sleeved on the outer wall of the piston rod (2). The connecting housing (301) has an open groove (302) inside. The inner circumferential wall of the open groove (302) has an open opening (303). The inner wall of the open opening (303) is provided with a clamping sleeve (305). The inner wall of the open opening (303) is slidably provided with a locking block (304). The sides of the locking block (304) and the clamping sleeve (305) that are close to each other are both designed to be inclined.

6. A hydraulic cylinder piston rod with a locking structure according to claim 5, characterized in that, The locking mechanism (3) includes a protective housing (306) fixedly connected to the outer circumferential wall of the connecting housing (301). A mounting plate (308) is fixedly connected to the top inner wall of the protective housing (306), and a drive motor (307) is fixedly connected to one side of the mounting plate (308).

7. A hydraulic cylinder piston rod with a locking structure according to claim 6, characterized in that, The output shaft of the drive motor (307) is fixedly connected to a threaded screw (309). A slider (310) is slidably provided on the outer wall of the threaded screw (309) through the thread. A connecting block (312) is fixedly connected to the bottom of the slider (310). A limit opening (311) is opened on the top inner wall of the movable groove (302). The connecting block (312) is slidably disposed in the limit opening (311).

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