Mechanical locking oil cylinder

Abstract

This utility model relates to the field of hydraulic cylinder technology, and more particularly to a mechanical locking hydraulic cylinder. The mechanical locking hydraulic cylinder includes a cylinder body, a piston rod slidably connected to the cylinder body, and a connecting plate fixedly mounted on the piston rod head. Gear plates are fixedly mounted on both sides of the connecting plate, and the gear plates are inserted into and slidably connected to a groove on the outer wall of the cylinder body. A self-locking component for locking the gear plates is installed on the cylinder body. The mechanical locking hydraulic cylinder provided by this utility model achieves locking through the meshing transmission of gear plates, gears, ratchet, and pawl, completely eliminating dependence on hydraulic oil pressure and avoiding the risk of failure caused by hydraulic oil deterioration. The pawl automatically engages the ratchet via a torsion spring, and the locking mechanism responds instantly when the piston rod slides outward and automatically locks when it moves in the opposite direction, ensuring high safety.

Description

Technical Field

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

[0002] Hydraulic cylinders, as the core actuators of hydraulic systems, commonly employ hydraulic circuit locking to position the piston rod. This method maintains oil pressure by controlling the flow of hydraulic oil, thereby fixing the piston rod. However, during long-term use, hydraulic oil is prone to contamination or oxidation, leading to decreased oil pressure stability and posing a safety hazard of accidental piston rod slippage. Furthermore, hydraulic systems have extremely high requirements for sealing; once a leak occurs, the locking function will fail, and maintenance costs are high. While some mechanical locking solutions exist in existing technologies (such as threaded locking or friction plate structures), they generally suffer from problems such as complex structure, slow response speed, cumbersome operation, or limited load-bearing capacity, making it difficult to operate stably under dynamic loads or high-frequency conditions.

[0003] Therefore, it is necessary to provide a new mechanical locking cylinder to solve the above-mentioned technical problems. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides a mechanical locking cylinder.

[0005] The mechanical locking cylinder provided by this utility model includes a cylinder body, a piston rod that is slidably connected to the cylinder body is inserted into the cylinder body, and a connecting plate is fixedly installed on the rod head of the piston rod;

[0006] Both sides of the connecting plate are fixedly installed with toothed plates, and the toothed plates are inserted into the sliding grooves opened on the outer wall of the cylinder and slidably connected to the sliding grooves.

[0007] The cylinder is equipped with a self-locking component for locking the toothed plate, and the self-locking component includes a rotating shaft, which is rotatably installed in a slide groove, and a gear and a ratchet are fixedly sleeved on the rotating shaft;

[0008] The self-locking component also includes a pawl for locking the ratchet;

[0009] The front cylinder head, which is mounted on the front end face of the cylinder block, has a sliding cavity, and the toothed plate passes through the sliding cavity and is slidably connected to the sliding cavity.

[0010] Preferably, the self-locking component further includes a bracket, which is fixedly mounted on the cylinder body, and a rotating rod is fixedly mounted on the bracket. A pawl is sleeved on the rotating rod, and a torsion spring for driving the pawl to engage the ratchet is also mounted on the rotating rod.

[0011] Preferably, the gear meshes with the gear plate.

[0012] Preferably, a button is fixedly mounted on the pawl.

[0013] Preferably, when the piston rod slides out of the cylinder body, the transmission torque of the pawl and ratchet is in the positive direction.

[0014] Compared with related technologies, the mechanical locking cylinder provided by this utility model has the following beneficial effects:

[0015] This invention achieves locking through the meshing transmission of a toothed plate, gears, ratchet, and pawl, completely eliminating dependence on hydraulic oil pressure and avoiding the risk of failure caused by hydraulic oil deterioration. The pawl automatically engages with the ratchet via a torsion spring, and the locking mechanism responds instantly when the piston rod slides outward and automatically locks when moving in the opposite direction, ensuring high safety. Attached Figure Description

[0016] Figure 1 A schematic diagram of a preferred embodiment of the mechanical locking cylinder provided by this utility model;

[0017] Figure 2 for Figure 1 The diagram shows the structure of the self-locking component.

[0018] The following are the labels in the diagram: 1. Cylinder block; 1a. Slide groove; 11. Front cylinder head; 11a. Sliding chamber; 2. Piston rod; 21. Connecting plate; 3. Gear plate; 4. Self-locking component; 41. Shaft; 42. Gear; 43. Ratchet; 44. Bracket; 45. Rotating rod; 46. Pawl; 47. Button. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0020] The specific implementation of this utility model will be described in detail below with reference to specific embodiments.

[0021] Please see Figures 1 to 2 The present invention provides a mechanical locking cylinder, which includes a cylinder body 1, a piston rod 2, and a self-locking component 4.

[0022] In the embodiments of this utility model, please refer to Figure 1 and Figure 2 A piston rod 2 is inserted into the cylinder body 1 and is slidably connected to the cylinder body 1. A connecting plate 21 is fixedly installed on the rod head of the piston rod 2. Tooth plates 3 are fixedly installed on both sides of the connecting plate 21. The tooth plates 3 are inserted into the sliding groove 1a opened on the outer wall of the cylinder body 1 and are slidably connected to the sliding groove 1a.

[0023] The cylinder body 1 is equipped with a self-locking component 4 for locking the toothed plate 3. The self-locking component 4 includes a rotating shaft 41, which is rotatably installed in the slide groove 1a. A gear 42 and a ratchet 43 are fixedly sleeved on the rotating shaft 41. The gear 42 meshes with the toothed plate 3. The self-locking component 4 also includes a pawl 46 for locking the ratchet 43. Specifically, the self-locking component 4 also includes a bracket 44, which is fixedly installed on the cylinder body 1. A rotating rod 45 is fixedly installed on the bracket 44. The pawl 46 is sleeved on the rotating rod 45. A torsion spring for driving the pawl 46 to abut against the ratchet 43 is also installed on the rotating rod 45. When the piston rod 2 slides outward along the cylinder body 1, the transmission torque of the pawl 46 and the ratchet 43 is in the positive direction.

[0024] It should be noted that when the piston rod 2 inside the cylinder 1 slides outward, since the transmission torque of the pawl 46 and the ratchet 43 is in the positive direction, the pawl 46 cannot lock the ratchet 43. Therefore, the toothed plate 3 slides outward along the sliding cavity 11a and drives the gear 42 to rotate. When the piston rod 2 inside the cylinder 1 receives an external force and tends to slide back, since the transmission torque of the pawl 46 and the ratchet 43 is in the opposite direction, the pawl 46 locks the ratchet 43. Therefore, the gear 42 is locked synchronously. Thus, the toothed plate 3 slides outward along the sliding cavity 11a and drives the gear 42 to rotate, preventing the piston rod 2 from moving in the opposite direction. This achieves a safer effect for the hydraulic cylinder and solves the problem that the locking method of the current common hydraulic cylinder relies on the hydraulic circuit locking method to lock the cylinder. The hydraulic oil in the cylinder is used to fix the piston rod 2. However, the hydraulic oil will deteriorate after long-term use, and the hydraulic oil pressure may be insufficient, which may cause the piston rod 2 to drop instantly.

[0025] When piston rod 2 needs to return, pressing button 47 causes pawl 46 to slide away from ratchet 43, thereby unlocking ratchet 43. Then, opening the hydraulic cylinder will drive piston rod 2 to return.

[0026] This application achieves locking through the meshing transmission of toothed plate 3, gear 42, ratchet 43 and pawl 46, completely eliminating dependence on hydraulic oil pressure and avoiding the risk of failure caused by hydraulic oil deterioration. The pawl 46 automatically abuts against the ratchet 43 through a torsion spring. When the piston rod 2 slides outward, the locking mechanism responds immediately and automatically locks when moving in the opposite direction, ensuring strong safety.

[0027] Furthermore, to enhance automation, an electric drive device (such as an electromagnet or a micro motor) can be added as needed to remotely control the pawl 43 to disengage, thereby achieving automated unlocking.

[0028] A button 47 is fixedly installed on the pawl 46 to facilitate pressing the pawl 46.

[0029] Furthermore, a sliding cavity 11a is provided on the front cylinder head 11 mounted on the front end face of the cylinder block 1, and the toothed plate 3 passes through the sliding cavity 11a and is slidably connected to the sliding cavity 11a, which effectively improves the stability of the toothed plate 3 and effectively prevents mechanical deformation caused by the toothed plate 3 being overloaded.

[0030] It is worth noting that in order to protect the self-locking component 4, protective covers can be added to both sides of the cylinder body to improve the protective effect of the self-locking component 4.

[0031] The circuits and controls involved in this utility model are all existing technologies, and will not be described in detail here.

[0032] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A mechanical locking cylinder, comprising a cylinder body (1), wherein a piston rod (2) slidably connected to the cylinder body (1) is inserted inside the cylinder body (1), and a connecting plate (21) is fixedly mounted on the rod head of the piston rod (2), characterized in that: Both sides of the connecting plate (21) are fixedly installed with toothed plates (3), and the toothed plates (3) are inserted into the sliding groove (1a) opened on the outer wall of the cylinder body (1) and are slidably connected to the sliding groove (1a). The cylinder (1) is equipped with a self-locking component (4) for locking the toothed plate (3), and the self-locking component (4) includes a rotating shaft (41), which is rotatably installed in the slide groove (1a), and a gear (42) and a ratchet (43) are fixedly sleeved on the rotating shaft (41). The self-locking component (4) also includes a pawl (46) for locking the ratchet (43). The front cylinder cover (11) mounted on the front end face of the cylinder body (1) has a sliding cavity (11a), and the toothed plate (3) passes through the sliding cavity (11a) and is slidably connected to the sliding cavity (11a).

2. The mechanical locking cylinder according to claim 1, characterized in that, The self-locking component (4) also includes a bracket (44), which is fixedly mounted on the cylinder (1), and a rotating rod (45) is fixedly mounted on the bracket (44). A pawl (46) is sleeved on the rotating rod (45), and a torsion spring for driving the pawl (46) to abut against the ratchet (43) is also mounted on the rotating rod (45).

3. The mechanical locking cylinder according to claim 2, characterized in that, The gear (42) meshes with the toothed plate (3).

4. The mechanical locking cylinder according to claim 3, characterized in that, A button (47) is fixedly installed on the pawl (46).

5. The mechanical locking cylinder according to claim 2, characterized in that, When the piston rod (2) slides outward along the cylinder body (1), the transmission torque of the pawl (46) and ratchet (43) is in the positive direction.

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