A hydraulic locking cylinder with a locking mechanism

Abstract

This utility model discloses a hydraulic locking cylinder with a locking mechanism, including a locking rod, a locking cylinder body, and a hydraulic cylinder. The locking rod is disposed within the locking cylinder body, which contains a locking device for locking and positioning the locking rod. The hydraulic cylinder is located on one side of the locking cylinder body, and its cylinder rod is connected to the locking rod. A pawl is provided on the cylinder rod of the hydraulic cylinder, which acts on the locking device to disengage the locking rod from its locking position. This utility model transforms the original hydraulic locking cylinder, where the piston and locking rod are integrated, into a hydraulic locking cylinder where the locking rod and piston are separate components, and incorporates a mechanical locking device. This effectively reduces equipment failures caused by damage to hydraulic components and pipelines, reduces maintenance time, improves equipment stability and service life, and ensures the normal operation of the production line.

Description

Technical Field

[0001] This utility model belongs to the technical field of hydraulic locking cylinders, specifically relating to a hydraulic locking cylinder with a locking mechanism. Background Technology

[0002] Hydraulic locking cylinders are key hydraulic actuators in bar rolling, primarily used for precisely controlling roll position, ensuring rolling accuracy, and guaranteeing equipment safety by performing locking actions. Their function is to ensure the rolls remain in a fixed position during rolling through a hydraulic locking mechanism, preventing displacement due to fluctuations in rolling force or load changes, thereby ensuring the dimensional accuracy and surface quality of the rolled bar. Precise roll positioning and fixing: After adjusting the roll gap (the gap between rolled bars), the hydraulic locking cylinder can firmly lock the roll position, preventing roll gap changes caused by large impact forces during rolling, ensuring the bar rolling accuracy meets requirements.

[0003] However, due to the long-term influence of operating conditions, the hydraulic locking cylinder is prone to pitting and wear on the cylinder rod surface, which reduces its sealing performance, leading to hydraulic oil leakage and failure of the hydraulic locking cylinder. This affects the rolling dimensions and accuracy of the rolling mill, and may even cause steel runaway accidents. Utility Model Content

[0004] The purpose of this utility model is to address the above-mentioned shortcomings in the prior art by providing a hydraulic locking cylinder with a locking mechanism. This solves the problem that the cylinder rod surface is prone to pitting and wear, which reduces its sealing performance, leads to hydraulic oil leakage, causes the hydraulic locking cylinder to fail, and thus affects the rolling dimensions and accuracy of the rolling mill, or even causes steel runaway accidents.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A hydraulic locking cylinder with a locking mechanism includes a locking rod, a locking cylinder body, and a hydraulic cylinder. The locking rod is disposed within the locking cylinder body, and a locking device is disposed within the locking cylinder body for locking and positioning the locking rod; the hydraulic cylinder is located on one side of the locking cylinder body, and the cylinder rod of the hydraulic cylinder is connected to the locking rod; the cylinder rod of the hydraulic cylinder is provided with a pawl, which acts on the locking device to disengage the locking rod from its locking position.

[0006] Furthermore, the cylinder rod head of the hydraulic cylinder is configured as a disc type, and the disc type cylinder rod head is connected to the locking rod inside the locking cylinder body through a half-pressure cover.

[0007] Furthermore, a wear-resistant sleeve is installed at the front end of the locking cylinder body.

[0008] Furthermore, a pressure cap is installed on the right end of the locking cylinder body in the direction of the locking rod extension. A dust cover is fitted on the front end of the pressure cap, and the tail end of the pressure cap abuts against the wear-resistant sleeve to achieve axial positioning of the wear-resistant sleeve.

[0009] Furthermore, the tail of the locking rod is provided with an axial groove and a radial groove, the radial groove passing through the axial groove and communicating with the axial groove.

[0010] Furthermore, a spring is installed inside the locking rod, with one end of the spring connected to the inside of the locking rod and the other end being a free end.

[0011] Furthermore, the locking device consists of two sets, the number of which is the same as the number of claws on the cylinder rod of the hydraulic cylinder; the locking device is symmetrically arranged at the upper and lower ends of the locking cylinder body, and corresponds to the claws distributed on both sides of the cylinder rod of the hydraulic cylinder.

[0012] Furthermore, the locking device includes a locking rod, a roller, and a locking spring disposed within the cavity; the locking spring is located within the cavity, with one end connected to the bottom of the cavity and the other end connected to the bottom of the locking rod, and a roller is disposed on the top of the locking rod.

[0013] Furthermore, under the elastic force of the locking spring, the locking rod enters the radial groove of the locking rod to achieve locking and positioning of the locking rod.

[0014] Furthermore, the pawl on the cylinder rod of the hydraulic cylinder moves within the axial groove of the locking rod, and through the arc surface of the pawl, pushes the locking rod of the locking device out of the radial groove, causing the locking rod to exit the locking position.

[0015] The hydraulic locking cylinder with locking mechanism provided by this utility model has the following beneficial effects: This utility model transforms the original hydraulic locking cylinder, which integrates the piston and locking rod, into a hydraulic locking cylinder with the locking rod and piston (hydraulic cylinder) as separate parts. It is also equipped with a mechanical locking device, which can effectively reduce equipment failures caused by damage to hydraulic components and hydraulic pipelines, reduce maintenance time, improve the stability and service life of equipment operation, and ensure the normal operation of the equipment line.

[0016] This invention solves the problem of hydraulic locking cylinder failure caused by wear of the locking rod and sealing ring due to iron oxide slag. A locking device for positioning the locking rod is installed within the hydraulic cylinder body, thus ensuring the normal operation of the hydraulic locking cylinder in the event of a hydraulic system failure. Therefore, this device can guarantee the normal operation of the hydraulic locking cylinder even after the hydraulic power medium is shut off. It also improves the service life and service cycle of the device, reduces maintenance and energy costs, and ensures the reliability and continuity of the production line operation. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the hydraulic locking cylinder with locking mechanism in the embodiment.

[0018] Figure 2 This is a schematic diagram of the locking mechanism of the hydraulic locking cylinder in an embodiment.

[0019] Figure 3 This is a schematic diagram of the hydraulic locking cylinder disengaging in an embodiment.

[0020] Figure 4 This is a schematic diagram of the locking rod in an embodiment.

[0021] Among them, 1. locking rod; 2. spring; 3. pressure plate; 4. half pressure plate; 5. locking cylinder body; 6. locking device; 7. hydraulic cylinder; 8. wear-resistant sleeve; 9. pawl; 10. radial groove; 11. axial groove; 12. second spring. Detailed Implementation

[0022] The specific embodiments of this utility model are described below to enable those skilled in the art to understand this utility model. However, it should be understood that this utility model is not limited to the scope of the specific embodiments. For those skilled in the art, as long as various changes are within the spirit and scope of this utility model as defined and determined by the appended claims, these changes are obvious. All utility model creations utilizing the concept of this utility model are within the scope of protection.

[0023] This embodiment features a hydraulic locking cylinder with a locking mechanism. The original integrated piston and locking rod 1 are replaced with a separate design, resolving the issue of cylinder failure caused by wear of the locking rod 1 and sealing ring due to iron oxide slag. The addition of the locking device 6 ensures the hydraulic locking cylinder continues to operate even after the energy medium is shut off. This modification optimizes the equipment's operating environment, improves its reliability and lifespan, reduces energy and maintenance costs, ensures production continuity, and achieves significant economic value. (Reference) Figure 1 Specifically, it includes: Locking rod 1, locking cylinder body 5, and hydraulic cylinder 7; In some embodiments, the locking rod 1 is disposed inside the locking cylinder body 5, and a locking device 6 is disposed inside the locking cylinder body. The locking device 6 is used to lock and position the locking rod 1. The hydraulic cylinder 7 is located on one side of the locking cylinder body 5, and the cylinder rod of the hydraulic cylinder 7 is connected to the locking rod 1. The cylinder rod of the hydraulic cylinder 7 is provided with a pawl 9, which acts on the locking device 6 to release the locking position of the locking rod 1.

[0024] In one specific embodiment, the cylinder rod head of the hydraulic cylinder 7 is configured as a disc type. The disc type cylinder rod head is connected to the locking rod 1 inside the locking cylinder body 5 through the half-pressure cover 4, thereby realizing the working mechanism of the hydraulic locking cylinder, and the locking cylinder body 5 realizes radial positioning and axial guidance.

[0025] In one specific embodiment, a wear-resistant sleeve 8 is installed at the front end inside the locking cylinder body 5 to reduce the wear caused by the back-and-forth displacement of the locking rod 1 inside the locking cylinder body 5.

[0026] In one specific embodiment, a pressure cap 3 is installed at the right end of the locking cylinder body 5, in the direction of the extension of the locking rod 1. A dust cover is fitted on the front end of the pressure cap 3, and the tail end of the pressure cap 3 abuts against the wear-resistant sleeve 8 to achieve axial positioning of the wear-resistant sleeve 8. The dust cover at the front end of the pressure cap 3 can reduce the adsorption of iron oxide slag on the working part where the locking rod 1 extends, thereby reducing component wear.

[0027] In one specific embodiment, reference is made to Figure 1 and Figure 4 The locking rod 1 has an axial groove 11 and a radial groove 10 at its tail end, with the radial groove 10 communicating with the axial groove 11. The axial groove 11 allows the pawl 9 on the cylinder rod to move back and forth and be angularly positioned within the locking rod 1; the radial groove 10 is a locking groove, which allows the locking device 6 to move up and down, thus completing the locking and unlocking functions of the hydraulic locking cylinder under two working conditions.

[0028] In one specific embodiment, a spring 2 is installed inside the locking rod 1. One end of the spring 2 is connected to the inside of the locking rod 1, and the other end is a free end, which is used to contact the cylinder rod of the hydraulic cylinder 7 when the locking rod 1 is working, so as to play a buffering and protective role. This can avoid the rigid connection between the cylinder rod of the hydraulic cylinder 7 and the locking rod 1, so as to realize the buffering function of the locking rod 1 when jammed, ensure equipment safety, and eliminate the failure of the locking device 6 caused by the displacement of the pawl 9 due to the vibration of the rolling mill during the locking operation of the hydraulic locking cylinder.

[0029] In one specific embodiment, a second spring 12 is provided at the front end of the cylinder rod of the hydraulic cylinder 7. The second spring 12 is located inside the locking rod 1. When the locking rod 1 is retracted, as... Figure 1 As shown, when the cylinder rod of the hydraulic cylinder 7 retracts, the second spring 12 on it presses against the half-pressure cover 4 to buffer the cylinder rod and the locking rod 1, thereby smoothly enabling the locking device 6 to exit the locking state.

[0030] In one specific embodiment, there are two sets of locking devices 6, the number of which is the same as the number of claws 9 on the cylinder rod of the hydraulic cylinder 7; the locking devices 6 are symmetrically arranged at the upper and lower ends of the locking cylinder body 5, and respectively correspond to the claws distributed on both sides of the cylinder rod of the hydraulic cylinder 7.

[0031] In one specific embodiment, the locking device 6 includes a locking rod, a roller, and a locking spring disposed in the cavity; the locking spring is located in the cavity, one end of which is connected to the bottom of the cavity, and the other end of which is connected to the bottom of the locking rod, and the top of the locking rod is provided with a roller.

[0032] The workflow of this embodiment is as follows: refer to Figure 2 and Figure 3 When the rolling mill is ready for positioning and locking, the hydraulic cylinder 7 is supplied with oil from the left end of the oil circuit, and the hydraulic rod is pushed out. The locking rod 1 is extended through the spring 2 to lock the rolling mill. When the locking rod 1 is moved to the rolling mill locking position, the locking rod of the locking device 6 enters the groove of the locking rod 1 under the action of the locking spring, thus locking and positioning the locking rod 1.

[0033] When it is necessary to replace the rolling mill or carry out maintenance work, the oil circuit at the right end of the hydraulic cylinder 7 is supplied with oil, the hydraulic rod retracts, and the locking rod 1 is moved through the half pressure cover 4. When the pawl 9 on the hydraulic rod (cylinder rod) of the hydraulic cylinder 7 moves the roller of the locking device 6, the locking rod of the locking device 6 is pushed out of the locking groove through the arc surface of the pawl 9, so that the locking rod 1 is released from the locking function. As the locking rod 1 moves, the roller of the locking device 6 is released from the pawl 9 and rolls on the surface of the locking rod 1 until the locking rod 1 returns to the appropriate position for relevant work.

[0034] Although the specific embodiments of the utility model have been described in detail with reference to the accompanying drawings, this should not be construed as limiting the scope of protection of this patent. Various modifications and variations that can be made by those skilled in the art without inventive effort within the scope described in the claims still fall within the scope of protection of this patent.

Claims

1. A hydraulic locking cylinder with a locking mechanism, characterized in that Includes a locking rod, a locking cylinder body, and a hydraulic cylinder; The locking rod is disposed within the locking cylinder body, and a locking device is disposed within the locking cylinder body for locking and positioning the locking rod; the hydraulic cylinder is located on one side of the locking cylinder body, and the cylinder rod of the hydraulic cylinder is connected to the locking rod; the cylinder rod of the hydraulic cylinder is provided with a pawl, which acts on the locking device to disengage the locking rod from its locking position.

2. The hydraulic locking cylinder with locking mechanism according to claim 1, characterized in that, The cylinder rod head of the hydraulic cylinder is configured as a disc type, and the disc type cylinder rod head is connected to the locking rod inside the locking cylinder body through a half-gland.

3. The hydraulic locking cylinder with locking mechanism according to claim 1, characterized in that, A wear-resistant sleeve is installed at the front end of the locking cylinder body.

4. The hydraulic locking cylinder with locking mechanism according to claim 3, characterized in that, A pressure cap is installed on the right end of the locking cylinder body in the direction of the locking rod extension. A dust cover is fitted on the front end of the pressure cap, and the tail end of the pressure cap abuts against the wear-resistant sleeve to achieve axial positioning of the wear-resistant sleeve.

5. The hydraulic locking cylinder with locking mechanism according to claim 1, characterized in that, The locking rod has an axial groove and a radial groove at its tail end, and the radial groove passes through the axial groove and communicates with the axial groove.

6. The hydraulic locking cylinder with locking mechanism according to claim 5, characterized in that A spring is installed inside the locking rod. One end of the spring is connected to the inside of the locking rod, and the other end is a free end.

7. The hydraulic locking cylinder with locking mechanism according to claim 6, characterized in that The locking devices are in two sets, the number of which is the same as the number of claws on the cylinder rod of the hydraulic cylinder; the locking devices are symmetrically arranged at the upper and lower ends of the locking cylinder body, and respectively correspond to the claws distributed on both sides of the cylinder rod of the hydraulic cylinder.

8. The hydraulic locking cylinder with locking mechanism according to claim 7, characterized in that The locking device includes a locking rod, a roller, and a locking spring disposed within the cavity; the locking spring is located within the cavity, with one end connected to the bottom of the cavity and the other end connected to the bottom of the locking rod, and a roller is disposed on the top of the locking rod.

9. The hydraulic locking cylinder with locking mechanism according to claim 8, characterized in that Under the elastic force of the locking spring, the locking rod enters the radial groove of the locking rod to achieve locking and positioning of the locking rod.

10. The hydraulic locking cylinder with locking mechanism according to claim 9, characterized in that The pawl on the cylinder rod of the hydraulic cylinder moves within the axial groove of the locking rod and pushes the locking rod of the locking device out of the radial groove through the arc surface of the pawl, causing the locking rod to exit the locking position.

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