A swing oil cylinder with buffer structure at the opening end and the terminal end

Abstract

The present invention belongs to the technical field of swing cylinders, and is particularly a swing cylinder with a buffer structure at the open end and the terminal end. It includes a cylinder, a rear end cover is installed on the lower end face of the cylinder, a center shaft is connected through the upper end face of the cylinder, a first protrusion is fixedly connected to the outer wall of the center shaft, a second protrusion is fixedly connected to the upper end face of the rear end cover, a first oil port and a second oil port are opened on the left side of the cylinder, a first large oil hole and a first small oil hole are opened on the inner wall and the right side of the first protrusion, a second large oil hole and a second small oil hole are opened on the inner wall and the right side of the second protrusion, an intermediate sleeve is installed between the center shaft and the cylinder, and an upper block and a lower block are fixedly connected at the upper and lower ends of the intermediate sleeve. The present invention moves the center sleeve up and down, and drives the upper block to block the first large oil hole when moving upward, and drives the lower block to block the second large oil hole when moving downward, and retains the two small oil holes for oil return, thereby achieving the purpose of deceleration.

Description

Technical Field

[0001] The invention relates to the technical field of swing cylinders, and in particular to a swing cylinder with a buffer structure at an opening end and a terminal end. Background Art

[0002] The rack and pinion type uses hydraulic pressure to push the pistons on both sides to move, driving the rack to move left and right, and the rack drives the intermediate shaft to rotate the shaft. Advantages: The rack and pinion swing cylinder is simple to manufacture and low in cost; the existing swing cylinder has no buffering function, and encounters a high speed or a large load condition, and the impact is very large when it turns to the terminal position. Summary of the invention

[0003] In order to solve the technical problems existing in the prior art, the present invention provides a swinging cylinder with a buffer structure at the opening end and the terminal end. The buffer mechanism is added to achieve the purpose of slow rotation of the starting end and the terminal end and rapid rotation of the middle part, and then automatically decelerates when the cylinder starts and stops, thereby realizing the buffer function.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a swing oil cylinder with a buffer structure at an open end and a terminal end, comprising a cylinder, a rear end cover is installed on the lower end surface of the cylinder, a central shaft is connected through the upper end surface of the cylinder, the lower end of the central shaft is connected through the rear end cover, a first protrusion is fixedly connected to the outer wall of the central shaft, the outer wall of the first protrusion abuts against the inner wall of the cylinder, a second protrusion is fixedly connected to the upper end surface of the rear end cover, the outer wall of the second protrusion abuts against the inner wall of the cylinder, a first oil port and a second oil port are opened on the left side of the cylinder from top to bottom, and a first large oil hole is opened on the inner wall of the first protrusion The right end of the first large oil hole is connected to the first oil port, the lower end surface of the first protrusion is provided with a first small oil hole, the upper end of the first small oil hole is connected to the first large oil hole, the inner wall of the second protrusion is provided with a second large oil hole, the right end of the second large oil hole is connected to the second oil port, the upper end surface of the second protrusion is provided with a second small oil hole, the lower end of the second small oil hole is connected to the second large oil hole, the outer wall of the center shaft is meshed with an intermediate sleeve through a gear, the outer wall of the intermediate sleeve is meshed with a supporting block through a gear, the outer wall of the supporting block is fixedly connected to the inner wall of the cylinder, and the upper and lower ends of the intermediate sleeve are respectively fixedly connected with an upper blocking block and a lower blocking block.

[0005] In order to maintain a seal between the intermediate sleeve and the cylinder body when it moves, as a preferred oscillating oil cylinder with a buffer structure at the open end and the terminal end of the present invention, the outer wall of the intermediate sleeve is fixedly sleeved with a first sealing ring, the outer wall of the first sealing ring is inlaid with a first sealing strip, and the outer ring of the first sealing strip is movably connected to the inner wall of the cylinder body.

[0006] In order to maintain a seal between the intermediate sleeve and the central shaft when it moves, as a preferred oscillating oil cylinder with a buffer structure at the open end and the terminal end of the present invention, the inner wall of the intermediate sleeve is fixedly connected to the second sealing ring, the inner ring of the second sealing ring is inlaid with a second sealing strip, and the inner ring of the second sealing strip is movably connected to the outer wall of the central shaft.

[0007] In order to completely block the first large oil hole and the first small oil hole, as a preferred embodiment of the present invention, a swing oil cylinder with a buffer structure at the open end and the terminal end has the same height as the first protrusion.

[0008] In order to completely block the second large oil hole and the second small oil hole, as a preferred embodiment of the present invention, a swing oil cylinder with a buffer structure at the open end and the terminal end has the same height as the lower blocking block and the second protrusion.

[0009] Compared with the prior art, the present invention has the following beneficial effects:

[0010] 1. For this type of swing cylinder with a buffer structure at the opening and terminal ends, the hydraulic oil enters the upper inner cavity of the cylinder through the first oil port, thereby pushing the intermediate sleeve to move downward. While the intermediate sleeve moves, the center shaft is driven to rotate clockwise through two sets of bevel gears. When the intermediate sleeve moves to the rear end cover, the lower block gradually covers the second largest oil hole on the rear end cover and retains the second small oil hole for oil return. The refluxed oil generates pressure on the intermediate sleeve, thereby achieving the purpose of deceleration.

[0011] 2. For this type of swing cylinder with a buffer structure at the opening end and the terminal end, the hydraulic oil enters the cavity below the cylinder through the second oil port, the central shaft rotates counterclockwise, the middle sleeve moves to the upper end of the outer wall of the central shaft, and then drives the upper block to move upward and gradually cover the first large oil hole, while retaining the oil return from the first small oil hole, thereby achieving the purpose of deceleration.

[0012] 3. The present invention adds a buffer mechanism, which can achieve the purpose of slow rotation of the starting end and the terminal end and rapid rotation of the middle part, thereby automatically decelerating when the cylinder starts and stops, thereby realizing the buffer function. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0014] Figure 1 It is a cross-sectional schematic diagram of the swing cylinder of the present invention;

[0015] Figure 2 For the present invention Figure 1 The enlarged schematic diagram at A in the middle;

[0016] Figure 3 For the present invention Figure 1 Enlarged schematic diagram of point B in the middle.

[0017] Explanation of symbols in the figure:

[0018] 1. Cylinder; 101. First oil port; 102. Second oil port; 103. Support block; 2. Center axis; 3. First protrusion; 301. First large oil hole; 302. First small oil hole; 4. Rear end cover; 5. Second protrusion; 501. Second large oil hole; 502. Second small oil hole; 6. Intermediate sleeve; 601. First sealing ring; 602. First sealing strip; 603. Upper block; 7. Second sealing ring; 701. Second sealing strip; 702. Lower block. DETAILED DESCRIPTION

[0019] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0020] See also Figure 1-Figure 3 The present invention provides the following technical solutions: a swing oil cylinder with a buffer structure at an open end and a terminal end, comprising a cylinder 1, a rear end cover 4 is installed on the lower end surface of the cylinder 1, a center shaft 2 is penetrated and connected to the upper end surface of the cylinder 1, the lower end of the center shaft 2 is penetrated and connected to the rear end cover 4, a first protrusion 3 is fixedly connected to the outer wall of the center shaft 2, the outer wall of the first protrusion 3 abuts against the inner wall of the cylinder 1, a second protrusion 5 is fixedly connected to the upper end surface of the rear end cover 4, and the outer wall of the second protrusion 5 abuts against the inner wall of the cylinder 1.

[0021] A first oil port 101 and a second oil port 102 are provided on the left side of the cylinder 1 from top to bottom, a first large oil hole 301 is provided on the inner wall of the first protrusion 3, the right end of the first large oil hole 301 is communicated with the first oil port 101, a first small oil hole 302 is provided on the lower end surface of the first protrusion 3, the upper end of the first small oil hole 302 is communicated with the first large oil hole 301, a second large oil hole 501 is provided on the inner wall of the second protrusion 5, the right end of the second large oil hole 501 is communicated with the second oil port 102, a second small oil hole 502 is provided on the upper end surface of the second protrusion 5, the lower end of the second small oil hole 502 is communicated with the second large oil hole 501, an outer wall of the central shaft 2 is meshed with an intermediate sleeve 6 through a gear, an outer wall of the intermediate sleeve 6 is meshed with a support block 103 through a gear, an outer wall of the support block 103 is fixedly connected to the inner wall of the cylinder 1, and an upper block 603 and a lower block 702 are fixedly connected to the upper and lower ends of the intermediate sleeve 6 respectively.

[0022] In this embodiment: the hydraulic oil enters the upper inner cavity of the cylinder 1 (cylinder) through the first oil port 101, thereby pushing the middle sleeve 6 to move downward. While the middle sleeve 6 moves, the center shaft 2 is driven to rotate clockwise through two sets of bevel gears. When the middle sleeve 6 moves to the rear end cover 4, the lower block 702 gradually covers the second largest oil hole 501 on the rear end cover 4, and retains the second small oil hole 502 for oil return. The refluxed oil generates pressure on the middle sleeve 6, thereby achieving the purpose of deceleration; the hydraulic oil enters the lower cavity of the cylinder 1 (cylinder) through the second oil port 102, the center shaft 2 rotates counterclockwise, the middle sleeve 6 moves to the upper end of the outer wall of the center shaft 2, thereby driving the upper block 603 to move upward and gradually cover the first largest oil hole 301, while retaining the first small oil hole 302 for oil return, thereby achieving the purpose of deceleration.

[0023] As a technical optimization solution of the present invention, the outer wall of the intermediate sleeve 6 is fixedly sleeved with a first sealing ring 601, the outer wall of the first sealing ring 601 is inlaid with a first sealing strip 602, the inner wall of the intermediate sleeve 6 is fixedly connected to the second sealing ring 7, the inner ring of the second sealing ring 7 is inlaid with a second sealing strip 701, and the inner ring of the second sealing strip 701 is movably connected to the outer wall of the central shaft 2.

[0024] In this embodiment: when the intermediate sleeve 6 moves upward, the oil on the upper side of the cylinder 1 is squeezed, and the oil is discharged through the first oil port 101. The first sealing ring 601 and the first sealing strip 602 can prevent the oil in the upper chamber of the cylinder 1 from flowing into the lower chamber of the cylinder 1; when the intermediate sleeve 6 moves downward, the oil on the lower side of the cylinder 1 is squeezed, and the oil is discharged through the second oil port 102. The second sealing ring 7 and the second sealing strip 701 can prevent the oil in the lower chamber of the cylinder 1 from flowing into the upper chamber of the cylinder 1, thereby ensuring the normal pressure inside the cylinder 1.

[0025] As a technical optimization solution of the present invention, the upper block 603 has the same height as the first convex block 3 , and the lower block 702 has the same height as the second convex block 5 .

[0026] In this embodiment: when the upper end of the upper block 603 moves to the uppermost side of the cylinder 1, the right side of the upper block 603 and the upper end surface of the first sealing ring 601 respectively block the first large oil hole 301 and the first small oil hole 302; when the lower end of the lower block 702 moves to the upper surface of the rear end cover 4, the right side of the lower block 702 completely blocks the second large oil hole 501, thereby causing the intermediate sleeve 6 to reciprocate.

[0027] The working principle and use process of the present invention are as follows: the hydraulic oil enters the upper inner cavity of the cylinder 1 (cylinder) through the first oil port 101, thereby pushing the middle sleeve 6 to move downward. While the middle sleeve 6 moves, the center shaft 2 is driven to rotate clockwise through two sets of bevel gears. When the middle sleeve 6 moves to the rear end cover 4, the lower block 702 gradually covers the second largest oil hole 501 on the rear end cover 4, and retains the second small oil hole 502 for oil return. The refluxed oil generates pressure on the middle sleeve 6, thereby achieving the purpose of deceleration; the hydraulic oil enters the cavity below the cylinder 1 (cylinder) through the second oil port 102, the center shaft 2 rotates counterclockwise, the middle sleeve 6 moves to the upper end of the outer wall of the center shaft 2, thereby driving the upper block 603 to move upward and gradually cover the first largest oil hole 301, while retaining the first small oil hole 302 for oil return, thereby achieving the purpose of deceleration.

[0028] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, in the description of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0029] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0030] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A swing cylinder with a buffer structure at the opening end and the terminal end, comprising a cylinder, characterized in that: The lower end surface of the cylinder is installed with a rear end cover, the upper end surface of the cylinder is penetrated by a center shaft, the lower end of the center shaft is penetrated and connected with the rear end cover, the outer wall of the center shaft is fixedly connected with a first protrusion, the outer wall of the first protrusion abuts against the inner wall of the cylinder, the upper end surface of the rear end cover is fixedly connected with a second protrusion, the outer wall of the second protrusion abuts against the inner wall of the cylinder, the left side of the cylinder is provided with a first oil port and a second oil port from top to bottom, the inner wall of the first protrusion is provided with a first large oil hole, the right end of the first large oil hole is connected with the first oil port, the lower end surface of the first protrusion is provided with a first small oil hole, the first The upper end of the small oil hole is connected with the first large oil hole, the inner wall of the second protrusion is provided with a second large oil hole, the right end of the second large oil hole is connected with the second oil port, the upper end surface of the second protrusion is provided with a second small oil hole, the lower end of the second small oil hole is connected with the second large oil hole, the outer wall of the central shaft is meshed with an intermediate sleeve through a gear, the outer wall of the intermediate sleeve is meshed with a supporting block through a gear, the outer wall of the supporting block is fixedly connected to the inner wall of the cylinder, the upper and lower ends of the intermediate sleeve are respectively fixedly connected with an upper blocking block and a lower blocking block; the upper blocking block has the same height as the first protrusion, and the lower blocking block has the same height as the second protrusion.

2. The swing cylinder with buffer structure at the opening end and the terminal end according to claim 1, characterized in that: A first sealing ring is fixedly sleeved on the outer wall of the intermediate sleeve, a first sealing strip is inlaid on the outer wall of the first sealing ring, and the outer ring of the first sealing strip is movably connected to the inner wall of the cylinder.

3. The swing cylinder with buffer structure at the opening end and the terminal end according to claim 1, characterized in that: The inner wall of the intermediate sleeve is fixedly connected to the second sealing ring, the inner ring of the second sealing ring is inlaid with a second sealing strip, and the inner ring of the second sealing strip is movably connected to the outer wall of the central shaft.

Images