Hydraulic oil cylinder based on impact force reduction

Abstract

The utility model relates to the technical field of hydraulic oil cylinders, in particular to a hydraulic oil cylinder based on reduction of impact force, which comprises a cylinder body, a piston rod and a piston body, the piston rod and the piston body are arranged in an inner cavity of the cylinder body, the outer end of the piston rod is connected with a transition round rod, the transition round rod is sleeved and connected with a movable seat assembly, and the outer circle of the cylinder body is sleeved and connected with a fixed seat assembly. At least two buffer rod mechanisms are arranged between the fixed seat assembly and the movable seat assembly; the buffer rod mechanism comprises a buffer rod body, one end of the buffer rod body penetrates through the movable seat assembly and is detachably connected, the other end of the buffer rod body penetrates through the fixed seat assembly and is slidably connected, the buffer rod body is sleeved with a contraction buffer spring assembly, and the outer circle of the end, away from the movable seat assembly, of the buffer rod body is sleeved with an extension buffer spring assembly. The hydraulic oil cylinder is reasonable in structure, vibration caused by sudden stop after the piston rod moves to the corresponding position is reduced through the buffer rod mechanism connected between the fixed seat assembly and the movable seat assembly, and the using effect of the hydraulic oil cylinder is enhanced.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic cylinder technology, and in particular to a hydraulic cylinder based on reducing impact force. Background Technology

[0002] A hydraulic cylinder is a hydraulic actuator that converts hydraulic energy into mechanical energy, performing linear reciprocating motion (or oscillating motion). It has a simple structure and reliable operation. When used to achieve reciprocating motion, it eliminates the need for a speed reduction device, eliminates transmission backlash, and provides smooth movement, thus finding wide application in the hydraulic systems of various machines. A hydraulic cylinder consists of a cylinder body, a piston, and a telescopic rod. The piston is located inside the cylinder body, and the telescopic rod extends into the cylinder body and connects to the piston. Hydraulic oil flows into the cylinder body through one port, driving the piston to move. The piston then drives the telescopic rod to extend. Hydraulic oil flows into the cylinder body through another port, driving the piston to move in the opposite direction. The piston then drives the telescopic rod to retract. In other words, the extension and retraction of the telescopic rod in the hydraulic cylinder drives the workpiece to move.

[0003] Regarding the aforementioned technologies, the inventors discovered that in order to improve the working efficiency of hydraulic cylinders, the piston and telescopic rod inside the hydraulic cylinder need to move rapidly. When the piston moves rapidly inside the cylinder, it is easy for the piston to generate a large impact force with the end of the cylinder cavity, causing the vibration generated by the hydraulic cylinder to be transmitted to the driven workpiece. Furthermore, the sudden stop of the driven workpiece after reaching the position will cause a large vibration, that is, the driven workpiece is prone to a certain degree of vibration, which reduces the effectiveness of the hydraulic cylinder. Utility Model Content

[0004] The main technical problem solved by this utility model is to provide a hydraulic cylinder based on reducing impact force. Through the buffer rod mechanism connected between the fixed seat assembly and the moving seat assembly, the vibration caused by the sudden stop after the piston rod moves to the corresponding position is reduced, thereby enhancing the performance of the hydraulic cylinder.

[0005] To solve the above-mentioned technical problems, the present invention provides a hydraulic cylinder based on reducing impact force, comprising: a cylinder body, a piston rod and a piston body disposed in its inner cavity, the outer end of the piston rod being connected to a transition rod, the end of the transition rod away from the piston rod being connected to a hinge joint, a movable seat assembly being fitted onto the transition rod, a fixed seat assembly being fitted onto the outer circle of the cylinder body, and at least two buffer rod mechanisms being provided between the fixed seat assembly and the movable seat assembly;

[0006] The buffer rod mechanism includes a buffer rod body, one end of which passes through the movable seat assembly and is detachably connected, and the other end passes through the fixed seat assembly and is slidably connected. A retractable buffer spring assembly is sleeved on the buffer rod body, one end of which is in contact with the movable seat assembly, and an extended buffer spring assembly is sleeved on the outer circle of the end of the buffer rod body away from the movable seat assembly.

[0007] By adopting the above technical solution, during use, the hydraulic cylinder's hinge joint connects to the driven workpiece. The hydraulic cylinder's operation causes the piston rod to extend rapidly. As the piston rod moves the driven workpiece closer to the corresponding position, the extending buffer spring assembly on the buffer rod contacts the fixed seat assembly. The extending buffer spring assembly is gradually compressed, generating a reverse elastic force. The direction of this reverse elastic force is opposite to the direction of piston rod movement, which absorbs the impact energy generated when the piston reaches its endpoint, reducing the impact force and thus reducing the vibration caused by the sudden stop of the driven workpiece after reaching the position. Conversely, the hydraulic cylinder's reverse operation causes the piston rod to retract rapidly. As the piston rod moves the driven workpiece in the opposite direction to the corresponding position, the retracting buffer spring assembly on the buffer rod contacts the fixed seat assembly. The retracting buffer spring assembly is gradually compressed, generating a reverse elastic force. The direction of this reverse elastic force is opposite to the direction of piston rod movement, which absorbs the impact energy generated when the piston returns to the starting point, reducing the impact force and further reducing the vibration caused by the driven workpiece returning to the starting point, thus enhancing the effectiveness of the hydraulic cylinder.

[0008] In a preferred embodiment, the present invention can be further configured as follows: the retraction buffer spring assembly includes a spring, one end of the spring is provided with a first annular pad, the other end is provided with a locking nut, the spring is sleeved on the buffer rod, the first annular pad is sleeved on the buffer rod and is slidably connected, and the locking nut is spirally connected to the buffer rod and is in close contact with the movable seat assembly.

[0009] By adopting the above technical solution, the piston rod drives the moving seat assembly on the transition rod to move towards the cylinder. After the first annular pad contacts the fixed seat assembly, the spring is gradually compressed to generate a reverse elastic force. The spring then buffers the piston body through the piston rod, reducing the impact force.

[0010] In a preferred embodiment, the present invention can be further configured as follows: the extended buffer spring assembly includes a second spring, one end of the second spring is provided with a second annular pad, and the other end is provided with two locking nuts. The second spring is sleeved on the buffer rod, the second annular pad is sleeved on the buffer rod and is slidably connected, and the two locking nuts are spirally connected to the buffer rod.

[0011] By adopting the above technical solution, the piston rod drives the moving seat assembly on the transition rod to move away from the cylinder body. After the second annular pad contacts the fixed seat assembly, the second spring is gradually compressed to generate a reverse elastic force. The second spring buffers the piston body through the piston rod, reducing the impact force.

[0012] In a preferred embodiment, the present invention can be further configured as follows: the movable seat assembly includes a movable seat body fitted and fixed on a transition round rod, the outer circle of the movable seat body is connected to an ear plate seat one equal in number to the buffer rod mechanism, the ear plate seat one is provided with a round hole, the buffer rod body is respectively inserted into the round hole, the end of the buffer rod body near the ear plate seat one is spirally connected to a limit nut, and the limit nut is tightly connected to the ear plate seat one.

[0013] By adopting the above technical solution, the use of the limiting nut prevents the buffer rod from dislodging from the round hole, and the moving seat body moves the buffer rod through the ear plate seat.

[0014] In a preferred embodiment, the present invention can be further configured such that: the fixed seat assembly includes a fixed seat body fitted onto the outer circle of the cylinder body, the outer circle of the fixed seat body is connected to ear plate seats two in number equal to the number of buffer rod mechanisms, each ear plate seat two is fitted with a guide sleeve, and each guide sleeve is slidably connected to the buffer rod body.

[0015] By adopting the above technical solution, the fixing seat body fixes the ear plate seat two, and the guide sleeve on the ear plate seat two guides the buffer rod body.

[0016] In summary, this utility model has at least one of the following beneficial technical effects:

[0017] 1. The extended buffer spring assembly is gradually compressed to generate a reverse elastic force. The direction of the reverse elastic force is opposite to the direction of piston rod movement. It can absorb the impact energy generated when the piston reaches the end point, reduce the impact force, reduce the vibration generated when the driven workpiece reaches the end point, and enhance the performance of the hydraulic cylinder.

[0018] 2. The compression buffer spring assembly is gradually compressed to generate a reverse elastic force. The direction of the reverse elastic force is opposite to the direction of piston rod movement. It can absorb the impact energy generated when the piston returns to the starting point, reduce the impact force, reduce the vibration generated when the driven workpiece returns to the starting point, and enhance the performance of the hydraulic cylinder. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein:

[0020] Figure 1 This is a schematic diagram of a preferred embodiment of a hydraulic cylinder based on reducing impact force according to this utility model.

[0021] Figure 2 yes Figure 1 Enlarged view of a portion of point A in the middle.

[0022] Figure 3 yes Figure 1 Enlarged view of section B in the middle.

[0023] In the diagram: 1. Cylinder body; 2. Piston rod; 3. Transition rod; 4. Hinge joint; 50. Moving seat assembly; 60. Fixed seat assembly; 7. Buffer rod; 80. Contraction buffer spring assembly; 90. Extension buffer spring assembly; 11. Limit nut; 12. Piston body;

[0024] 51. Movable base body; 52. Ear plate seat one; 53. Round hole;

[0025] 61. Fixing base body; 62. Ear plate seat two; 63. Guide sleeve;

[0026] 81. Spring 1; 82. First annular washer; 83. Locking nut 1;

[0027] 91. Spring 2; 92. Second annular washer; 93. Locking nut 2. Detailed Implementation

[0028] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0029] It should be noted that these figures are simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0030] Reference Figures 1-3This utility model discloses a hydraulic cylinder based on reducing impact force, comprising: a cylinder body 1, a piston rod 2 and a piston body 12 disposed in its inner cavity, the end of the piston rod 2 located inside the piston body 12 being connected to the piston body 12, a transition rod 3 being connected to the outer end of the piston rod 2, a hinge joint 4 being connected to the end of the transition rod 3 away from the piston rod 2, the hinge joint 4 being connected to the driven workpiece, a movable seat assembly 50 being fitted onto the transition rod 3, a fixed seat assembly 60 being fitted onto the outer circle of the cylinder body 1, and at least two buffer rod mechanisms being provided between the fixed seat assembly 60 and the movable seat assembly 50.

[0031] The buffer rod mechanism includes a buffer rod body 7. One end of the buffer rod body 7 passes through the movable seat assembly 50 and is detachably connected, while the other end passes through the fixed seat assembly 60 and is slidably connected. A retractable buffer spring assembly 80 is sleeved on the buffer rod body 7. One end of the retractable buffer spring assembly 80 is in contact with the movable seat assembly 50. An extended buffer spring assembly 90 is sleeved on the outer circumference of the end of the buffer rod body 7 away from the movable seat assembly 50. The extended buffer spring assembly 90 includes a second spring 91. One end of the second spring 91 is provided with a second annular washer 92, and the other end is provided with two locking nuts. Two locking nuts 93 are in close contact to prevent loosening. Spring 91 is sleeved on buffer rod 7. The second annular pad 92 is sleeved on buffer rod 7 and is slidably connected. The two locking nuts 93 are spirally connected on buffer rod 7. Piston rod 2 drives the moving seat assembly 50 on transition rod 3 to move away from cylinder 1. After the second annular pad 92 contacts the fixed seat assembly 60, spring 91 is gradually compressed to generate a reverse elastic force. Spring 91 buffers piston body 12 through piston rod 2 to reduce impact force.

[0032] The compression buffer spring assembly 80 includes a spring 81, one end of which is provided with a first annular pad 82, and the other end is provided with a locking nut 83. The spring 81 is sleeved on the buffer rod 7, the first annular pad 82 is sleeved on the buffer rod 7 and is slidably connected, and the locking nut 83 is screwed on the buffer rod 7 and is in close contact with the moving seat assembly 50. The piston rod 2 drives the moving seat assembly 50 on the transition rod 3 to move towards the cylinder 1. After the first annular pad 82 contacts the fixed seat assembly 60, the spring 81 is gradually compressed and generates a reverse elastic force. The spring 81 buffers the piston body 12 through the piston rod 2, reducing the impact force.

[0033] The movable seat assembly 50 includes a movable seat body 51 that is fitted and fixed on the transition round rod 3. The outer circle of the movable seat body 51 is connected to ear plate seats 52, which are equal in number to the number of buffer rod mechanisms. Each ear plate seat 52 is provided with a round hole 53, and the buffer rod 7 is inserted into each round hole 53. The end of the buffer rod 7 near the ear plate seat 52 is screwed with a limiting nut 11, which is tightly connected to the ear plate seat 52. By using the limiting nut 11, the buffer rod 7 is prevented from detaching from the round hole 53. The movable seat body 51 moves the buffer rod 7 through the ear plate seats 52.

[0034] The fixed seat assembly 60 includes a fixed seat body 61 that is fitted onto the outer circle of the cylinder body 1. The outer circle of the fixed seat body 61 is connected to ear plate seats 62 in number equal to the number of buffer rod mechanisms. Guide sleeves 63 are respectively embedded in the ear plate seats 62, and the buffer rods 7 are slidably connected in the guide sleeves 63. The fixed seat body 61 fixes the ear plate seats 62, and the guide sleeves 63 on the ear plate seats 62 guide the buffer rods 7.

[0035] The implementation principle of this embodiment is as follows: During use, the hinge joint 4 of the hydraulic cylinder is connected to the driven workpiece. The operation of the hydraulic cylinder causes the piston rod 2 to extend rapidly. As the piston rod 2 moves the driven workpiece closer to the corresponding position, the extension buffer spring assembly 90 on the buffer rod 7 contacts the fixed seat assembly 60. The extension buffer spring assembly 90 is gradually compressed to generate a reverse elastic force. The direction of the reverse elastic force is opposite to the direction of movement of the piston rod 2, which can absorb the impact energy generated when the piston body 12 reaches the end point, reduce the impact force, and thus reduce the impact of the driven workpiece reaching the position. The vibration caused by the emergency stop causes the hydraulic cylinder to work in the opposite direction, resulting in a rapid retraction of the piston rod 2. As the piston rod 2 moves the driven workpiece in the opposite direction to approach the corresponding position, the contraction buffer spring assembly 80 on the buffer rod 7 contacts the fixed seat assembly 60. The contraction buffer spring assembly 80 is gradually compressed, generating a reverse elastic force. The direction of the reverse elastic force is opposite to the direction of movement of the piston rod 2. This can absorb the impact energy generated when the piston body 12 returns to the starting point, reduce the impact force, reduce the vibration generated when the driven workpiece returns to the starting point, and enhance the performance of the hydraulic cylinder.

[0036] 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 using the content of this utility model specification, 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 hydraulic cylinder based on reducing impact force, comprising: A cylinder (1), a piston rod (2) and a piston body (12) disposed in its inner cavity, wherein the outer end of the piston rod (2) is connected to a transition round rod (3), and the end of the transition round rod (3) away from the piston rod (2) is connected to a hinge joint (4), characterized in that a movable seat assembly (50) is fitted on the transition round rod (3), and a fixed seat assembly (60) is fitted on the outer circle of the cylinder (1), wherein no less than two buffer rod mechanisms are provided between the fixed seat assembly (60) and the movable seat assembly (50); The buffer rod mechanism includes a buffer rod body (7), one end of which passes through the movable seat assembly (50) and is detachably connected, and the other end passes through the fixed seat assembly (60) and is slidably connected. A retractable buffer spring assembly (80) is sleeved on the buffer rod body (7), one end of which is in contact with the movable seat assembly (50), and an extended buffer spring assembly (90) is sleeved on the outer circle of the end of the buffer rod body (7) away from the movable seat assembly (50). The extended buffer spring assembly (90) includes a second spring (91), one end of which is provided with a second annular pad (92), and the other end is provided with two locking nuts (93). The second spring (91) is sleeved on the buffer rod (7), the second annular pad (92) is sleeved on the buffer rod (7) and is slidably connected, and the two locking nuts (93) are spirally connected to the buffer rod (7).

2. The hydraulic cylinder based on reducing impact force according to claim 1, characterized in that, The retractable buffer spring assembly (80) includes a spring (81), one end of which is provided with a first annular pad (82) and the other end is provided with a locking nut (83). The spring (81) is sleeved on the buffer rod (7), the first annular pad (82) is sleeved on the buffer rod (7) and is slidably connected, and the locking nut (83) is spirally connected to the buffer rod (7) and is in close contact with the moving seat assembly (50).

3. The hydraulic cylinder based on reducing impact force according to claim 1, characterized in that, The movable seat assembly (50) includes a movable seat body (51) fitted and fixed on a transition round rod (3). The outer circle of the movable seat body (51) is connected to an ear plate seat (52) equal in number to the buffer rod mechanism. The ear plate seat (52) is provided with round holes (53). The buffer rod body (7) is inserted into the round holes (53). The end of the buffer rod body (7) near the ear plate seat (52) is screwed with a limit nut (11). The limit nut (11) is tightly connected to the ear plate seat (52).

4. The hydraulic cylinder based on reducing impact force according to claim 1, characterized in that, The fixed seat assembly (60) includes a fixed seat body (61) fitted onto the outer circle of the cylinder body (1). The outer circle of the fixed seat body (61) is connected to ear plate seats (62) in the same number as the buffer rod mechanism. Guide sleeves (63) are respectively embedded on the ear plate seats (62), and the buffer rod body (7) is slidably connected inside the guide sleeves (63).

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