Hydraulic oil cylinder with protection function

Abstract

The utility model relates to a hydraulic oil cylinder with a protection function. The hydraulic oil cylinder is provided with a cylinder body, an oil filling port, a piston rod and a protection bottom plate annularly sleeved on the outer wall of the cylinder body, an open groove is formed in the protective bottom plate, the open groove has an open state and a closed state, an axial limiting groove is formed in one side of the open groove in a communicating mode, and the open groove in the open state and the axial limiting groove can allow the oil injection port to pass through and slide in the open groove and the axial limiting groove; locking assemblies are fixedly arranged at the two ends of the open groove. The protective bottom plate is detachably and annularly arranged on the outer wall of the cylinder body in a sleeving mode through sliding between the oil injection opening and the open groove in the open state and sliding between the oil injection opening and the axial limiting groove and the open groove in the closed state. A plurality of protection plates are distributed on the outer wall of the protection bottom plate, a buffer spring is fixedly arranged between each protection plate and the protection bottom plate, one end of each buffer spring is fixedly arranged on the corresponding protection plate, and the other end of each buffer spring is fixedly arranged on the protection bottom plate. The damage is avoided.

Description

Technical Field

[0001] The utility model relates to a hydraulic cylinder with protection. Background Art

[0002] A hydraulic cylinder is a hydraulic actuator that can convert hydraulic energy into mechanical energy. Its normal working mode is to make a linear reciprocating motion driven by hydraulic energy. It can be seen in various large machines in life. And there are many types of hydraulic cylinders, mainly including piston cylinders, plunger cylinders, and swing cylinders. Their working characteristics are different, but they mainly achieve the drive and conduction of machinery. The main structure of a hydraulic cylinder generally includes a cylinder barrel and a cylinder head, a piston and a piston rod, a sealing device, a buffer device, and an exhaust device. Its main working principle is to inject hydraulic oil into the cylinder barrel through two oil inlets in sequence, so as to realize the pushing and contraction of the piston rod, and thus generate a pushing and retracting force on the object connected to the piston rod, so as to control its movement.

[0003] During the use of a hydraulic cylinder, if it is used improperly, the outer wall of the cylinder body of the hydraulic cylinder is collided, increasing the risk of cylinder wall rupture; at the same time, the piston rod will reciprocate during use. After being hit, it will quickly retract, and after retracting, it will quickly squeeze the hydraulic oil in the cylinder body. If the hydraulic oil overflows, it will cause problems such as fuel explosion. Content of the Utility Model

[0004] The purpose of the utility model is to provide a hydraulic cylinder with protection, which can protect the outer wall of the cylinder body and prevent the piston rod from retracting and leaking fluid and being damaged.

[0005] The technical solution to achieve the purpose of the utility model is: the utility model has a cylinder body, an oil injection port arranged on the side wall of the cylinder body and communicated with the cylinder body, a piston rod slidably arranged at one end of the upper end of the cylinder body, and a protection bottom plate sleeved on the outer wall of the cylinder body; characterized in that: an opening groove with both ends communicated with the outside and arranged along the extension direction of the cylinder body is arranged on the protection bottom plate. The opening groove has an open state and a closed state. An axial limiting groove is communicated and arranged on one side of the opening groove. The open opening groove and the axial limiting groove can both allow the oil injection port to pass through and slide inside; locking components for converting the opening groove between the open state and the closed state are fixedly arranged at both ends of the opening groove; the protection bottom plate is detachably sleeved on the outer wall of the cylinder body through the sliding of the oil injection port with the open opening groove and the axial limiting groove and the closed opening groove; a plurality of protection plates are distributed around the circumference of the outer wall of the protection bottom plate, and buffer springs are fixedly arranged between each protection plate and the protection bottom plate. One end of the buffer spring is fixedly arranged on the protection plate, and the other end of the buffer spring is fixedly arranged on the protection bottom plate.

[0006] Furthermore, the locking assembly includes a first locking block fixedly arranged on one side of the opening groove, a second locking block fixedly arranged on the other side of the opening groove, and a bolt. Corresponding threaded holes that can form a threaded fit with the bolt are provided on the first locking block and the second locking block. The opening groove is switched between an open state and a closed state through the threaded fit of the bolt with the threaded holes on the first locking block and the second locking block.

[0007] Furthermore, an extension plate is fixedly arranged at the upper end of the cylinder block. The outer edge of the extension plate extends out of the cylinder block. A protective bracket is provided on the extension plate. The protective bracket includes support columns that can pass through the extension plate and form a sliding fit, and a fixed block fixedly arranged at the upper end of the support columns. There are multiple support columns, and they are all distributed around the piston rod in a circumferential manner. The lower end of the fixed block is fixedly arranged above each support column. Through holes for the piston rod to pass through and form a sliding fit are provided in the middle of the extension plate and the fixed block. The piston rod is slidably arranged on the fixed block through the sliding fit with the through hole in the middle of the fixed block; Compression springs are sleeved on each support column. One end of the compression spring acts on the fixed block, and the other end of the compression spring acts on the extension plate.

[0008] Furthermore, threads are provided on the part of each support column that passes through, and nuts that can form a threaded fit with the threads are also provided. Each support column is restricted on the extension plate through the threaded fit of the nut with the threads.

[0009] Furthermore, a limiting block that can collide with the fixed block after sliding is fixedly arranged at the end of the piston rod away from the cylinder block.

[0010] Furthermore, ceramic wear-resistant layers are provided on the outer wall of the piston rod and the inner wall of the through hole.

[0011] The utility model has positive effects: (1) A plurality of protective plates are distributed around the outer wall of the protective bottom plate of the utility model in a circumferential manner. Buffer springs are fixedly arranged between each protective plate and the protective bottom plate. One end of the buffer spring is fixedly arranged on the protective plate, and the other end of the buffer spring is fixedly arranged on the protective bottom plate; The protective plate can be buffered under the action of the buffer spring after being impacted or collided, avoiding direct collision between the cylinder block and the outside world and ensuring the safety of the cylinder block.

[0012] (2) The locking assembly of the present utility model includes a first locking block fixedly arranged on one side of the opening groove, a second locking block fixedly arranged on the other side of the opening groove, and a bolt. Corresponding screw holes that can form a threaded fit with the bolt are provided on the first locking block and the second locking block. The opening groove is converted between an open state and a closed state through the threaded fit of the bolt with the screw holes on the first locking block and the screw holes on the second locking block; through the conversion of the open state and the closed state of the opening groove, when the opening groove is in the closed state, the oil injection port is restricted within the axial limiting groove, and when the opening groove is in the open state, the oil injection port can slide from the axial limiting groove into the mouth groove; the protective bottom plate is detachably sleeved on the cylinder block through the conversion of the opening groove between the open state and the closed state by the locking assembly and the release and restriction of the oil injection port within the axial limiting groove.

[0013] (3) A protective bracket is provided on the extension plate of the present utility model. The protective bracket includes a support column that can pass through the extension plate and form a sliding fit, and a fixing block fixedly arranged at the upper end of the support column. Through holes for the piston rod to pass through and form a sliding fit are provided in the middle of the extension plate and the fixing block. The piston rod is slidably arranged on the fixing block through the sliding fit with the through hole in the middle of the fixing block; Compression springs are sleeved on each support column. One end of the compression spring acts on the fixing block, and the other end of the compression spring acts on the extension plate. When the fixing block is impacted, the support column moves, and under the action of the compression spring, the fixing block rebounds to slow down the impact and prevent the piston rod from being impacted and causing cylinder explosion.

[0014] (4) Threads are provided on the parts of each support column that pass through, and nuts that can form a threaded fit with the threads are also provided. Each support column is restricted on the extension plate through the threaded fit of the nut with the thread to prevent the support column from detaching from the extension plate.

[0015] (5) Ceramic wear-resistant layers are provided on the outer wall of the piston column and the inner wall of the through hole of the present utility model. The ceramic wear-resistant layer can reduce the friction between the piston rod and the through hole and increase durability. Description of the Drawings

[0016] In order to make the content of the present utility model easier to be clearly understood, the following further details the present utility model according to specific embodiments in conjunction with the drawings, where

[0017] Figure 1 is the front view of the present utility model;

[0018] Figure 2 is the top view of the present utility model;

[0019] Figure 3 is the structural schematic diagram of the protective bottom plate of the present utility model;

[0020] Figure 4 is Figure 1Partial enlarged view of A;

[0021] Figure 5 is Figure 2 Partial enlarged view of B in Specific implementation mode

[0022] see Figures 1 to 5 , the utility model has a cylinder block 1, an oil injection port 11 arranged on the side wall of the cylinder block 1 and communicated with the cylinder block 1, a piston rod 2 with one end slidably arranged at the upper end of the cylinder block 1, and a protective bottom plate 3 sleeved around the outer wall of the cylinder block 1; it is characterized in that: an opening groove 31 with both ends communicated with the outside and arranged along the extending direction of the cylinder block 1 is arranged on the protective bottom plate 3, the opening groove 31 has an open state and a closed state, an axial limiting groove 32 is communicated and arranged on one side of the opening groove 31, and the open opening groove 31 and the axial limiting groove 32 can both allow the oil injection port 11 to pass through and slide therein; locking components 4 are fixedly arranged at both ends of the opening groove 31 and can convert the opening groove 31 between the open state and the closed state; the protective bottom plate 3 is detachably sleeved around the outer wall of the cylinder block 1 through the sliding between the oil injection port 11 and the open opening groove 31 and the axial limiting groove 32 and the closed opening groove 31; a plurality of protective plates 5 are distributed around the circumference of the outer wall of the protective bottom plate 3, buffer springs 6 are fixedly arranged between each protective plate 5 and the protective bottom plate 3, one end of the buffer spring 6 is fixedly arranged on the protective plate 5, and the other end of the buffer spring 6 is fixedly arranged on the protective bottom plate 3.

[0023] The locking component 4 includes a first locking block 41 fixedly arranged on one side of the opening groove 31, a second locking block 42 fixedly arranged on the other side of the opening groove 31, and a bolt 43. Corresponding screw holes that can form a threaded 711 fit with the bolt 43 are arranged on the first locking block 41 and the second locking block 42, and the opening groove 31 is converted between the open state and the closed state through the threaded 711 fit of the bolt 43 with the screw holes on the first locking block 41 and the second locking block 42.

[0024] When the bolt 43 rotates clockwise, the first locking block 41 and the second locking block 42 approach and fit with each other, and at this time the opening groove 31 is in the closed state; when the bolt 43 rotates counterclockwise, the first locking block 41 and the second locking block 42 move away from each other. After moving away to the farthest distance, at this time the opening groove 31 is in the open state

[0025] At the upper end of the cylinder block 1, an extension plate 12 is fixedly provided. The outer edge of the extension plate 12 extends out of the cylinder block 1. A protective bracket 7 is provided on the extension plate 12. The protective bracket 7 includes a support column 71 that can pass through the extension plate 12 and form a sliding fit, and a fixed block 72 fixedly arranged at the upper end of the support column 71. There are multiple support columns 71, and they are all distributed around the piston rod 2 in a circumferential manner. The lower end of the fixed block 72 is fixedly arranged above each support column 71. A through hole for the piston rod 2 to pass through and form a sliding fit is provided in the middle of the extension plate 12 and the fixed block 72. The piston rod 2 is slidably arranged on the fixed block 72 through a sliding fit with the through hole in the middle of the fixed block 72; Compression springs 8 are sleeved on each support column 71. One end of the compression spring 8 acts on the fixed block 72, and the other end of the compression spring 8 acts on the extension plate 12.

[0026] A plurality of round holes for the support columns 71 to pass through are provided on the extension plate 12. The lower end of the support column 71 can pass through the round holes, and the upper end of the support column 71 is fixedly connected to the fixed block 72.

[0027] Threads 711 are provided on the part of each support column 71 that passes through, and nuts 712 that can form a threaded fit with the threads 711 are also provided. Each support column 71 is restricted on the extension plate 12 through the threaded fit of the nut 712 and the threads 711.

[0028] A limit block 21 that can collide with the fixed block 72 after sliding is fixedly provided at the end of the piston rod 2 away from the cylinder block 1.

[0029] Ceramic wear-resistant layers are provided on both the outer wall of the piston rod 2 and the inner wall of the through hole.

[0030] The installation method of the present utility model: Adjust the opening groove 31 to the open state. The oil injection port 11 enters from the opening groove 31, and then the entered oil injection port 11 enters the axial limit groove 32. Through the control of the locking assembly 4, the opening groove 31 in the open state becomes the closed state. The closed opening groove 31 can close the axial limit groove 32, so that the oil injection port 11 remains in the axial limit groove 32. At this time, the protective bottom plate 3 is detachably sleeved on the cylinder block 1; The middle part of the fixed block 72 slides on the piston rod 2. The lower end of the support column 71 passes through one end of the round hole and is assembled with a nut 712 through a threaded fit. The support column 71 is restricted on the extension plate 12 under the cooperation of the nut 712.

[0031] In the above specific embodiments, the purpose, technical solution and beneficial effects of the present utility model are further described in detail. It should be understood that the above are only specific embodiments of the present utility model and are not used to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A hydraulic oil cylinder with protection, comprising a cylinder body (1), an oil filling port (11) arranged on the side wall of the cylinder body (1) and connected to the cylinder body (1), a piston rod (2) with one end slidably arranged on the upper end of the cylinder body (1), and a protective bottom plate (3) sleeved on the outer wall of the cylinder body (1); characterized in that: The protective bottom plate (3) is provided with an open groove (31) whose two ends are connected to the outside and is arranged along the extension direction of the cylinder body (1); the open groove (31) has an open state and a closed state; an axial limit groove (32) is connected on one side of the open groove (31); the open groove (31) and the axial limit groove (32) in the open state can allow the oil filling port (11) to pass through and slide inside; locking components (4) that can convert the open groove (31) between the open state and the closed state are fixedly provided at both ends of the open groove (31); The bottom plate (3) is detachably sleeved on the outer wall of the cylinder body (1) by sliding between the oil filling port (11) and the open groove (31) in the open state and the axial limit groove (32) and the open groove (31) in the closed state; a plurality of protective plates (5) are distributed circumferentially on the outer wall of the bottom plate (3); a buffer spring (6) is fixedly arranged between each protective plate (5) and the bottom plate (3); one end of the buffer spring (6) is fixedly arranged on the protective plate (5), and the other end of the buffer spring (6) is fixedly arranged on the protective plate (3).

2. A hydraulic cylinder with protection according to claim 1, characterized in that: The locking assembly (4) comprises a first locking block (41) fixedly arranged on one side of the opening slot (31), a second locking block (42) fixedly arranged on the other side of the opening slot (31), and a bolt (43); the first locking block (41) and the second locking block (42) are respectively provided with screw holes which can cooperate with the bolt (43) to form a thread (711); the opening slot (31) is switched between an open state and a closed state by the bolt (43) cooperating with the thread (711) of the screw hole on the first locking block (41) and the screw hole on the second locking block (42).

3. The hydraulic cylinder with protection according to claim 1, characterized in that: An expansion plate (12) is fixedly provided at the upper end of the cylinder body (1), the outer edge of the expansion plate (12) extends out of the cylinder body (1), a protective bracket (7) is provided on the expansion plate (12), the protective bracket (7) comprises a support column (71) which can pass through the expansion plate (12) and form a sliding fit, and a fixed block (72) fixedly arranged at the upper end of the support column (71), a plurality of support columns (71) are provided and are circumferentially distributed around the piston rod (2), the lower end of the fixed block (72) is fixedly arranged above each support column (71), a through hole is provided in the middle of the expansion plate (12) and the fixed block (72) for the piston rod (2) to pass through and form a sliding fit, and the piston rod (2) is slidably arranged on the fixed block (72) through the sliding fit with the through hole in the middle of the fixed block (72); each support column (71) is sleeved with a compression spring (8), one end of the compression spring (8) acts on the fixed block (72), and the other end of the compression spring (8) acts on the expansion plate (12).

4. A hydraulic cylinder with protection according to claim 3, characterized in that: The portion through which each support column (71) passes is provided with a thread (711), and a nut (712) that can cooperate with the thread (711) is also provided. Each support column (71) is restricted on the expansion plate (12) by the nut (712) cooperating with the thread (711) of the thread (711).

5. The hydraulic cylinder with protection according to claim 3, characterized in that: A limiting block (21) is fixedly provided on one end of the piston rod (2) away from the cylinder body (1) and can collide with the fixed block (72) after sliding.

6. The hydraulic cylinder with protection according to claim 3, characterized in that: A ceramic wear-resistant layer is provided on the outer wall of the piston rod (2) and the inner wall of the through hole.

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