Short-stroke hydraulic cylinder
By designing an auxiliary limiting device in a short-stroke hydraulic cylinder, the cooperation of threaded rods and clamps is used to solve the problems of piston rod wear and shaking, and a more stable and efficient hydraulic transmission is achieved.
Patent Information
- Application Number
- CN202420746547.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-11
- Publication Date
- 2025-04-25
- Estimated Expiration
- 2034-04-11
AI Technical Summary
During the operation of the hydraulic cylinder, wear between the piston rod and the inner wall of the cylinder causes the piston rod to shake, affecting the normal operation of the mechanical structure and increasing energy loss.
A short-stroke hydraulic cylinder is designed, and an auxiliary limiting device is adopted, including a clamp, a threaded rod and an auxiliary plate. The clamp movement is driven by the expansion and contraction of the threaded rod to achieve limiting the piston rod and prevent shaking.
It effectively prevents the piston rod from shaking during the expansion and contraction process, reduces wear, improves the operating stability of the mechanical structure and reduces energy loss.
Smart Images
Figure CN222797807U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of hydraulic cylinders, in particular to a short-stroke hydraulic cylinder. Background Art
[0002] A short-stroke hydraulic cylinder is a small hydraulic cylinder, which refers to a hydraulic cylinder with a diameter less than 100mm and a stroke less than 500mm. As an important hydraulic component, small hydraulic cylinders are widely used in machinery and equipment, automobile industry, construction engineering, shipbuilding and other industries. They are a hydraulic transmission component with stable performance, high efficiency and long service life.
[0003] The inventor discovered in his daily work that when the hydraulic cylinder is in operation, the piston rod will continuously extend and retract on the inner wall of the cylinder. Over time, this will cause wear on the outer surface of the piston rod and the inner wall of the cylinder, which may cause the piston rod to shake during the extension and retraction process, which is not conducive to the normal operation of the mechanical structure and will cause higher energy loss. Utility Model Content
[0004] The utility model proposes a short-stroke hydraulic cylinder to solve the problem that the outer surface of the piston rod and the inner wall of the cylinder will be worn when the piston rod is extended or retracted, which may cause the piston rod to shake during the extension and retraction process, is not conducive to the normal operation of the mechanical structure, and causes higher energy loss.
[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a short-stroke hydraulic cylinder, comprising a cylinder body, a sleeve fixedly connected to the top of the cylinder body, a piston rod slidably connected to the inside of the cylinder body, the outer surface of the piston rod is slidably connected to the inner wall of the sleeve, the outer surface of the piston rod is provided with an auxiliary limiting device, the auxiliary limiting device comprises a clamping plate, two of the clamping plates are symmetrically arranged on the outer surface of the piston rod, circular hole blocks are arranged on the sides of the two clamping plates away from each other, a convenient disassembly device is arranged between the circular hole block and the clamping plate, a threaded rod is arranged on one side of the circular hole block, the outer surface of the threaded rod is threadedly connected to an auxiliary plate, and one side of the two auxiliary plates is symmetrically fixedly connected to one side of the cylinder body.
[0006] The effect achieved by the above-mentioned components is: by setting two clamping plates, under the action of their corresponding threaded rods, the threaded rods are rotated, and the threaded rods will be extended and retracted on the inner wall of the auxiliary plate. During the extension and retraction process, the threaded rods will drive the clamping plates to move synchronously until one side of the two clamping plates is in contact with the outer surface of the piston rod. The piston rod can be limited in position, which is beneficial to prevent the piston rod from shaking, which is not conducive to the normal operation of the mechanical structure and causes higher energy loss.
[0007] Preferably, one end of the threaded rod is fixedly connected to a bearing, and the outer surface of the bearing is fixedly connected to the inner wall of the circular hole block.
[0008] The effect achieved by the above components is that by providing the bearing, the friction between the threaded rod and the circular hole block can be reduced when the threaded rod rotates, thereby making the threaded rod more labor-saving when rotating.
[0009] Preferably, the other end of the threaded rod is fixedly connected to an operating block, and a protrusion is provided on the outer surface of the operating block.
[0010] The effect achieved by the above components is: by setting the operating block, rotating the operating block can drive the threaded rod to rotate, and at the same time, the outer surface of the operating block is provided with a protrusion, which can effectively increase the friction force of the outer surface of the operating block, and has an anti-slip effect when rotating the operating block, thereby facilitating the rotation of the threaded rod through the operating block.
[0011] Preferably, a sliding block is fixedly connected to one side of the clamping plate, a sliding groove is symmetrically provided on one side of the cylinder body, and an outer surface of the sliding block is slidably connected to an inner wall of the sliding groove.
[0012] The effect achieved by the above components is: by setting the slider and the slide groove, the clamping plate can be limited, so that the clamping plate is more stable when moving.
[0013] Preferably, a rubber plate is provided on one side of the two clamping plates that are close to each other, and one side of the rubber plate is fixedly connected to one side of the clamping plates.
[0014] The effect achieved by the above components is that the rubber plate is provided to replace one side of the clamping plate in contact with the piston rod, thereby protecting the piston rod.
[0015] Preferably, the easy-to-disassemble device comprises a mounting block, one side of which is fixedly connected to one side of the clamping plate, one side of which is provided with a mounting groove, and the outer surface of the circular hole block is inserted into the inner wall of the mounting groove.
[0016] The effect achieved by the above components is: by setting a mounting block with a mounting groove and inserting the circular hole block into the inner wall of the mounting groove, the circular hole block and the splint can be connected, thereby facilitating the adjustment of the splint through the threaded rod, and at the same time making the splint detachable, thereby making the splint easy to maintain and replace.
[0017] Preferably, threaded pins are symmetrically inserted into the inner wall of the circular hole block, and one end of the threaded pins is fixedly connected to one side of the clamping plate.
[0018] The effect achieved by the above components is: by arranging the threaded pin and inserting the threaded pin into the inner wall of the circular hole block, the circular hole block and the clamping plate can be further limited.
[0019] Preferably, a nut is provided on the outer surface of the threaded pin, and the outer surface of the threaded pin is threadedly inserted into the inner wall of the nut.
[0020] The effect achieved by the above-mentioned components is: by setting a nut, sleeve the nut on one end of the threaded pin, and rotate the nut so that one side of the nut abuts against one side of the circular hole block, the circular hole block and the threaded pin can be limited to prevent the circular hole block from detaching from the threaded pin and the inner wall of the mounting groove.
[0021] Compared with the prior art, the advantages and positive effects of the utility model are:
[0022] In the utility model, two clamping plates are provided. Under the action of the corresponding threaded rods, the threaded rods can be extended and retracted on the inner wall of the auxiliary plate. During the extension and retraction process, the threaded rods will drive the clamping plates to move synchronously until one side of the two clamping plates fits with the outer surface of the piston rod. This can limit the piston rod and help prevent the piston rod from shaking, which would be detrimental to the normal operation of the mechanical structure and cause higher energy loss. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] Figure 1 It is a three-dimensional structural schematic diagram of the main body of the utility model;
[0024] Figure 2 It is a three-dimensional structural schematic diagram of the cylinder body of the utility model;
[0025] Figure 3 For this utility model Figure 2 A schematic diagram of the enlarged structure at point A;
[0026] Figure 4 It is a three-dimensional structural schematic diagram of the piston rod of the utility model;
[0027] Figure 5 For this utility model Figure 4 Schematic diagram of the enlarged structure at B
[0028] Legend: 1. Cylinder body; 2. Sleeve; 3. Piston rod; 4. Auxiliary limit device; 41. Clamp; 42. Round hole block; 43. Threaded rod; 44. Auxiliary plate; 45. Bearing; 46. Operating block; 47. Slider; 48. Slide groove; 49. Rubber plate; 5. Disassembly device; 51. Mounting block; 52. Mounting groove; 53. Threaded pin; 54. Nut. DETAILED DESCRIPTION
[0029] Example 1, reference Figure 1-Figure 3As shown, this embodiment discloses a short-stroke hydraulic cylinder, including a cylinder body 1, a sleeve 2 is fixedly connected to the top of the cylinder body 1, a piston rod 3 is slidably connected to the inside of the cylinder body 1, the outer surface of the piston rod 3 is slidably connected to the inner wall of the sleeve 2, and an auxiliary limiting device 4 is arranged on the outer surface of the piston rod 3. The auxiliary limiting device 4 includes a clamping plate 41, two clamping plates 41 are symmetrically arranged on the outer surface of the piston rod 3, and a circular hole block 42 is arranged on the side away from the two clamping plates 41. A convenient disassembly device 5 is arranged between the circular hole block 42 and the clamping plate 41, and a threaded rod 43 is arranged on one side of the circular hole block 42. The outer surface of the threaded rod 43 The surface is threadedly connected with an auxiliary plate 44, and one side of the two auxiliary plates 44 is symmetrically fixedly connected to one side of the cylinder body 1. By setting two clamping plates 41, the threaded rod 43 is rotated under the action of the corresponding threaded rods 43, and the threaded rod 43 will be extended and retracted on the inner wall of the auxiliary plate 44. The threaded rod 43 will drive the clamping plate 41 to move synchronously during the extension and retraction process until one side of the two clamping plates 41 is in contact with the outer surface of the piston rod 3. In this way, the piston rod 3 can be limited, which is beneficial to prevent the piston rod 3 from shaking, which is not conducive to the normal operation of the mechanical structure and causes higher energy loss.
[0030] Reference Figure 2-Figure 5 As shown, one end of the threaded rod 43 is fixedly connected to a bearing 45, and the outer surface of the bearing 45 is fixedly connected to the inner wall of the circular hole block 42. By providing the bearing 45, the friction between the threaded rod 43 and the circular hole block 42 can be reduced when the threaded rod 43 rotates, thereby making the threaded rod 43 more labor-saving when rotating; the other end of the threaded rod 43 is fixedly connected to an operating block 46, and the outer surface of the operating block 46 is provided with a protrusion. By providing the operating block 46, rotating the operating block 46 can drive the threaded rod 43 to rotate. At the same time, the outer surface of the operating block 46 is provided with a protrusion, which can effectively increase the friction of the outer surface of the operating block 46, and has an anti-slip effect when the operating block 46 is rotated, thereby facilitating the rotation of the threaded rod 43 through the operating block 46.
[0031] Reference Figure 2 and Figure 3 As shown, a slider 47 is fixedly connected to one side of the splint 41, and a slide groove 48 is symmetrically provided on one side of the cylinder body 1. The outer surface of the slider 47 is slidably connected to the inner wall of the slide groove 48. By setting the slider 47 and the slide groove 48, the splint 41 can be limited, so that the splint 41 is more stable when moving; a rubber plate 49 is provided on the side where the two splints 41 are close to each other, and one side of the rubber plate 49 is fixedly connected to one side of the splint 41. By setting the rubber plate 49, one side of the splint 41 is replaced by abutting against the piston rod 3, which can protect the piston rod 3.
[0032] Reference Figure 4 and Figure 5As shown, the disassembly device 5 includes a mounting block 51, one side of which is fixedly connected to one side of the clamping plate 41, and a mounting groove 52 is provided on one side of the mounting block 51. The outer surface of the circular hole block 42 is inserted into the inner wall of the mounting groove 52. By providing the mounting block 51 with the mounting groove 52 and inserting the circular hole block 42 into the inner wall of the mounting groove 52, the circular hole block 42 and the clamping plate 41 can be connected, thereby facilitating the adjustment of the clamping plate 41 by the threaded rod 43, and at the same time making the clamping plate 41 detachable, thereby making the clamping plate 41 easy to maintain and replace.
[0033] Reference Figure 4 and Figure 5 As shown, threaded pins 53 are symmetrically inserted into the inner wall of the circular hole block 42, and one end of the threaded pin 53 is fixedly connected to one side of the clamping plate 41. By setting the threaded pin 53 and inserting the threaded pin 53 into the inner wall of the circular hole block 42, the circular hole block 42 and the clamping plate 41 can be further limited; a nut 54 is provided on the outer surface of the threaded pin 53, and the outer surface of the threaded pin 53 is threadedly inserted into the inner wall of the nut 54. By setting the nut 54 and sleeved on one end of the threaded pin 53, the nut 54 is rotated so that one side of the nut 54 abuts against one side of the circular hole block 42, which can limit the circular hole block 42 and the threaded pin 53 and prevent the circular hole block 42 from escaping from the threaded pin 53 and the inner wall of the mounting groove 52.
[0034] Working principle: when it is necessary to assist in fixing the piston rod 3, the rotating operating block 46 drives the threaded rod 43 to rotate, and the threaded rod 43 will extend and retract on the inner wall of the auxiliary plate 44. Under the limitation of the slider 47 and the slide groove 48, the threaded rod 43 will drive the clamping plate 41 to move synchronously during the extension and retraction process until the rubber plates 49 on one side of the two clamping plates 41 fit with the outer surface of the piston rod 3, so that the piston rod 3 can be limited, which is beneficial to prevent the piston rod 3 from shaking, which is not conducive to the normal operation of the mechanical structure and causes higher energy loss. When it is necessary to install the clamping plate 41, the circular hole block 42 is inserted into the inner wall of the installation groove 52, and the threaded pin 53 is inserted into the inner wall of the circular hole block 42 to connect the circular hole block 42 and the clamping plate 41, and then the nut 54 is sleeved on one end of the threaded pin 53, and the nut 54 is rotated so that one side of the nut 54 abuts against one side of the circular hole block 42.
Claims
1. A short-stroke hydraulic cylinder, comprising a cylinder body (1), characterized in that: The top of the cylinder body (1) is fixedly connected to a sleeve (2), the interior of the cylinder body (1) is slidably connected to a piston rod (3), the outer surface of the piston rod (3) is slidably connected to the inner wall of the sleeve (2), the outer surface of the piston rod (3) is provided with an auxiliary limiting device (4), the auxiliary limiting device (4) comprises a clamping plate (41), two clamping plates (41) are symmetrically arranged on the outer surface of the piston rod (3), a circular hole block (42) is provided on the side away from the two clamping plates (41), a convenient disassembly device (5) is provided between the circular hole block (42) and the clamping plate (41), a threaded rod (43) is provided on one side of the circular hole block (42), the outer surface of the threaded rod (43) is threadedly connected to an auxiliary plate (44), and one side of the two auxiliary plates (44) is symmetrically fixedly connected to one side of the cylinder body (1).
2. The short-stroke hydraulic cylinder according to claim 1, characterized in that: One end of the threaded rod (43) is fixedly connected to a bearing (45), and the outer surface of the bearing (45) is fixedly connected to the inner wall of the circular hole block (42).
3. The short-stroke hydraulic cylinder according to claim 1, characterized in that: The other end of the threaded rod (43) is fixedly connected to an operating block (46), and a protrusion is provided on the outer surface of the operating block (46).
4. The short-stroke hydraulic cylinder according to claim 1, characterized in that: A slider (47) is fixedly connected to one side of the clamping plate (41), a slide groove (48) is symmetrically provided on one side of the cylinder body (1), and the outer surface of the slider (47) is slidably connected to the inner wall of the slide groove (48).
5. The short-stroke hydraulic cylinder according to claim 1, characterized in that: A rubber plate (49) is provided on one side of the two clamping plates (41) that are close to each other, and one side of the rubber plate (49) is fixedly connected to one side of the clamping plate (41).
6. The short-stroke hydraulic cylinder according to claim 1, characterized in that: The convenient disassembly device (5) comprises a mounting block (51), one side of the mounting block (51) is fixedly connected to one side of the clamping plate (41), one side of the mounting block (51) is provided with a mounting groove (52), and the outer surface of the circular hole block (42) is inserted into the inner wall of the mounting groove (52).
7. The short-stroke hydraulic cylinder according to claim 6, characterized in that: The inner wall of the circular hole block (42) is symmetrically inserted with a threaded pin (53), and one end of the threaded pin (53) is fixedly connected to one side of the clamping plate (41).
8. The short-stroke hydraulic cylinder according to claim 7, characterized in that: The outer surface of the threaded pin (53) is provided with a nut (54), and the outer surface of the threaded pin (53) is threadedly inserted into the inner wall of the nut (54).