Pressurizing structure for improving bending stability of hollow piston rod

Abstract

The pressurizing structure comprises an oil cylinder barrel, a cylinder bottom lug ring is fixedly connected to the bottom of the oil cylinder barrel, an oil injection port is formed in the left end of the oil cylinder barrel, a guide sleeve is slidably connected into the oil cylinder barrel in a sleeved mode, a piston rod is movably connected into the guide sleeve in a sleeved mode, and the piston rod is connected with the oil cylinder barrel in a sleeved mode. The top of the piston rod is fixedly connected with a hinged lug ring rod head, and a connecting mechanism is arranged on the guide sleeve. Through the design of the oil injection port, oil can be injected into the oil cylinder barrel and the piston rod, the purpose of improving the bending stability of the piston rod can be achieved, and in the oil injection process, the plug can be separated from the fixed seat by pushing the push rod to move; at the moment, gas in the piston rod is extruded into the fixed seat and exhausted through the exhaust port, the purpose of exhausting gas in the oil cylinder barrel and the piston rod is achieved, and the bending stability of the piston rod can be further improved by increasing the oil injection amount.

Description

Technical Field

[0001] This utility model relates to the field of pressurization structure technology, specifically a pressurization structure for improving the bending stability of a hollow piston rod. Background Technology

[0002] To improve the bending stability of hollow piston rods, a pressurized structure can be reinforced, often by filling with oil. Utility model patent CN209800402U discloses a pressurized structure for increasing the bending stability of hollow piston rods in hydraulic cylinders. This structure mainly includes a cylinder barrel, a hollow piston rod, a piston, and a guide sleeve. The conventional hollow piston rod cavity, closed at both ends by welded rod heads, is connected to the rodless cavity of the cylinder barrel via a through-hole structure on the piston rod head at the piston mounting end, forming a pressurized piston rod. This increases the compressive bending stability of the hollow piston rod. When the hollow piston rod cavity is an oil passage, the through-hole structure on the welded piston rod head connects to the rodless cavity of the cylinder, achieving synchronous pressurization with the maximum working pressure of the cylinder. Even after pressurization, if the hollow rod still has sufficient material strength, pressurization effectively improves the bending stability of the slender piston rod.

[0003] In existing technologies, it is inconvenient to vent gas from the piston rod during the use of stamping structures. This gas can affect the amount of oil filling, thus impacting the pressurization effect. Therefore, improvements are needed. Utility Model Content

[0004] The purpose of this invention is to provide a pressurization structure that improves the bending stability of a hollow piston rod, and solves the problem of inconvenient venting of the piston rod during the stamping process.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a pressurization structure for improving the bending stability of a hollow piston rod, comprising a cylinder barrel, a cylinder bottom lug fixedly connected to the bottom of the cylinder barrel, an oil inlet provided at the left end of the cylinder barrel, a guide sleeve slidably sleeved inside the cylinder barrel, a piston rod movably sleeved inside the guide sleeve, a hinged lug rod head fixedly connected to the top of the piston rod, a connecting mechanism provided on the guide sleeve, and an exhaust mechanism provided on the piston rod.

[0006] Preferably, the piston rod is movably fitted with multiple sealing rings, each of which is fixedly fitted inside the guide sleeve. By designing the sealing rings, the connection between the piston rod and the guide sleeve can be sealed.

[0007] Preferably, the connecting mechanism includes a support base, which is fixedly connected to the outer side of the cylinder barrel. A screw is threadedly connected to the inside of the support base, and a connecting block is rotatably connected to the top of the screw via a bearing. A guide rod is fixedly connected to the lower end of the connecting block, and the guide rod is slidably connected to the support base. A connecting rod is rotatably connected to the inside of the connecting block via a bearing, and the connecting rod contacts the guide sleeve. An insert block is fixedly connected to the lower end of the connecting rod, and the insert block is slidably connected to the guide sleeve. This connecting mechanism facilitates the disassembly of the guide sleeve.

[0008] Preferably, the guide sleeve has a slot inside, and an insert block is slidably connected inside the slot. By designing the slot, the insert block can slide inside the slot.

[0009] Preferably, the exhaust mechanism includes a fixed seat, with the right end of the piston rod fixedly connected to the fixed seat. A plug is slidably fitted inside the fixed seat, and a push rod is fixedly connected to the right end of the plug. The push rod is slidably connected to the fixed seat. A connecting rod is fixedly connected to the outside of the plug, and a slider is fixedly connected to the outside of the connecting rod. Both the connecting rod and the slider are slidably connected to the fixed seat. A fixed rod is slidably fitted inside the slider, and the fixed rod is fixedly connected to the fixed seat. A spring is provided on the outside of the fixed rod, and an exhaust port is provided inside the fixed seat. This exhaust mechanism facilitates the exhaust of air from the cylinder and piston rod.

[0010] Preferably, one end of the spring is fixedly connected to the slider, and the other end of the spring is fixedly connected to the fixed base. The spring is designed so that its force can be applied to the slider.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0012] 1. This utility model, through the design of the oil injection port, allows oil to be injected into the cylinder barrel and piston rod, thereby improving the bending stability of the piston rod. During the oil injection process, the plug can be separated from the fixed seat by pushing the push rod to move. At this time, the gas inside the piston rod is squeezed into the fixed seat and discharged through the exhaust port, thereby achieving the purpose of venting the cylinder barrel and piston rod. Increasing the amount of oil injected can further improve the bending stability of the piston rod.

[0013] 2. This utility model, through the design of the guide sleeve, can guide the movement of the piston rod. Under the downward pressure of the connecting rod and the insert block on the guide sleeve, the connection stability between the guide sleeve and the cylinder can be improved, thus achieving the purpose of preventing oil leakage. In addition, the insert block can be easily removed from the inside of the guide sleeve, making it convenient to disassemble the guide sleeve and facilitate the inspection and maintenance of the cylinder and piston rod structure, making it more convenient. Attached Figure Description

[0014] Figure 1This is a three-dimensional view of the overall structure of this utility model;

[0015] Figure 2 This utility model Figure 1 A partial three-dimensional sectional view of the structure;

[0016] Figure 3 This utility model Figure 2 Enlarged view of point A;

[0017] Figure 4 This utility model Figure 2 The front sectional view of the fixed base.

[0018] In the diagram: 1. Cylinder barrel; 2. Cylinder bottom lug; 3. Oil inlet; 4. Guide sleeve; 5. Sealing ring; 6. Piston rod; 7. Hinge lug rod head; 8. Connecting mechanism; 9. Exhaust mechanism; 81. Support seat; 82. Screw; 83. Connecting block; 84. Guide rod; 85. Connecting rod; 86. Insert block; 87. Slot; 91. Fixed seat; 92. Plug; 93. Push rod; 94. Connecting rod; 95. Slider; 96. Fixed rod; 97. Spring; 98. Exhaust port. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Please see Figure 1 , Figure 2 A pressurization structure for improving the bending stability of a hollow piston rod includes a cylinder 1, a cylinder bottom lug 2 fixedly connected to the bottom of the cylinder 1, an oil inlet 3 provided at the left end of the cylinder 1, a guide sleeve 4 slidably sleeved inside the cylinder 1, a piston rod 6 movably sleeved inside the guide sleeve 4, and multiple sealing rings 5 ​​movably sleeved on the outside of the piston rod 6. Each sealing ring 5 is fixedly sleeved inside the guide sleeve 4. By designing the sealing rings 5, the connection between the piston rod 6 and the guide sleeve 4 can be sealed. A hinged lug rod head 7 is fixedly connected to the top of the piston rod 6. A connecting mechanism 8 is provided on the guide sleeve 4, and an exhaust mechanism 9 is provided on the piston rod 6.

[0021] Please see Figure 1 , Figure 2 , Figure 3The connecting mechanism 8 includes a support base 81. The support base 81 is fixedly connected to the outside of the cylinder 1. A screw 82 is threadedly connected to the inside of the support base 81. A connecting block 83 is rotatably connected to the top of the screw 82 via a bearing. A guide rod 84 is fixedly connected to the lower end of the connecting block 83. The guide rod 84 is slidably connected to the support base 81. A connecting rod 85 is rotatably connected to the inside of the connecting block 83 via a bearing. The connecting rod 85 contacts the guide sleeve 4. An insert 86 is fixedly connected to the lower end of the connecting rod 85. The insert 86 is slidably connected to the guide sleeve 4. A slot 87 is provided inside the guide sleeve 4. The insert 86 is slidably connected inside the slot 87. By designing the slot 87, the insert 86 can slide inside the slot 87. By designing the connecting mechanism 8, it is convenient to disassemble the guide sleeve 4.

[0022] Please see Figure 1 , Figure 2 , Figure 4 The exhaust mechanism 9 includes a fixed seat 91. The right end of the piston rod 6 is fixedly connected to the fixed seat 91. A plug 92 is slidably sleeved inside the fixed seat 91. A push rod 93 is fixedly connected to the right end of the plug 92. The push rod 93 is slidably connected to the fixed seat 91. A connecting rod 94 is fixedly connected to the outside of the plug 92. A slider 95 is fixedly connected to the outside of the connecting rod 94. Both the connecting rod 94 and the slider 95 are slidably connected to the fixed seat 91. A fixed rod 96 is slidably sleeved inside the slider 95. The fixed rod 96 is fixedly connected to the fixed seat 91. A spring 97 is provided on the outside of the fixed rod 96. One end of the spring 97 is fixedly connected to the slider 95, and the other end of the spring 97 is fixedly connected to the fixed seat 91. By designing the spring 97, the force of the spring 97 can act on the slider 95. An exhaust port 98 is opened inside the fixed seat 91. By designing the exhaust mechanism 9, it is convenient to exhaust the oil cylinder 1 and the piston rod 6.

[0023] The specific implementation process of this utility model is as follows: During use, oil can be injected into the cylinder barrel 1 and piston rod 6 through the oil injection port 3, which can improve the bending stability of the piston rod 6. During the oil injection process, the push rod 93 is pushed inward, the push rod 93 drives the plug 92 to move, the plug 92 drives the connecting rod 94 to move, the connecting rod 94 drives the slider 95 to slide along the fixed rod 96, and the slider 95 squeezes the spring 97, so that the plug 92 separates from the inner wall of the fixed seat 91. During the oil injection process, air will be squeezed into the fixed seat 91. At this time, the gas will be discharged through the exhaust port 98, achieving the purpose of venting the cylinder barrel 1 and piston rod 6. Increasing the amount of oil injected can further improve the bending stability of the piston rod 6.

[0024] The guide sleeve 4 guides the movement of the piston rod 6. The downward pressure of the connecting rod 85 and the insert block 86 on the guide sleeve 4 improves the connection stability between the guide sleeve 4 and the cylinder 1, thus preventing oil leakage. When the guide sleeve 4 needs to be disassembled, simply rotate the screw 82 to make it threaded. The screw 82 drives the connecting block 83 to move, and the connecting block 83 drives the guide rod 84 to move upward. At the same time, the connecting block 83 drives the connecting rod 85 to move upward, and the connecting rod 85 drives the insert block 86 to move and separate from the slot 87. Then, rotate the connecting rod 85 to make it rotate along the connecting block 83 and completely separate from the guide sleeve 4. At this time, moving the guide sleeve 4 can remove the guide sleeve 4 from the inside of the cylinder 1, which is more convenient for the inspection and maintenance of the cylinder 1 and the piston rod 6 structure.

[0025] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A pressurized structure for improving the bending stability of a hollow piston rod, comprising a cylinder barrel (1), characterized in that: The bottom of the oil cylinder barrel (1) is fixedly connected with a cylinder bottom lug (2), the left end of the oil cylinder barrel (1) is provided with an oil inlet (3), the inside of the oil cylinder barrel (1) is slidably sleeved with a guide sleeve (4), the inside of the guide sleeve (4) is movably sleeved with a piston rod (6), the top of the piston rod (6) is fixedly connected with a hinged lug rod head (7), the guide sleeve (4) is provided with a connecting mechanism (8), and the piston rod (6) is provided with an exhaust mechanism (9).

2. The pressurized structure for improving the bending stability of a hollow piston rod according to claim 1, characterized in that: A plurality of sealing rings (5) are movably sleeved on the outside of the piston rod (6), and each sealing ring (5) is fixedly sleeved on the inside of the guide sleeve (4).

3. The pressurized structure for improving the bending stability of a hollow piston rod according to claim 1, characterized in that: The connecting mechanism (8) comprises a support seat (81), the outside of the oil cylinder barrel (1) is fixedly connected with the support seat (81), the inside of the support seat (81) is threadedly connected with a screw rod (82), the top of the screw rod (82) is rotatably connected with a connecting block (83) through a bearing, the lower end of the connecting block (83) is fixedly connected with a guide rod (84), the guide rod (84) is slidably connected with the support seat (81), the inside of the connecting block (83) is rotatably connected with a connecting rod (85) through a bearing, the connecting rod (85) is in contact with the guide sleeve (4), and the lower end of the connecting rod (85) is fixedly connected with an insertion block (86).

4. The pressurized structure for improving the bending stability of a hollow piston rod according to claim 1, characterized in that: The inside of the guide sleeve (4) is provided with an insertion slot (87), and the insertion block (86) is slidably connected in the insertion slot (87).

5. The pressurized structure for improving the bending stability of a hollow piston rod according to claim 1, characterized in that: The exhaust mechanism (9) comprises a fixed seat (91), the right end of the piston rod (6) is fixedly connected with the fixed seat (91), the inside of the fixed seat (91) is slidably sleeved with a plug (92), the right end of the plug (92) is fixedly connected with a push rod (93), the push rod (93) is slidably connected with the fixed seat (91), the outside of the plug (92) is fixedly connected with a connecting rod (94), the outside of the connecting rod (94) is fixedly connected with a sliding block (95), the connecting rod (94) and the sliding block (95) are slidably connected with the fixed seat (91), the inside of the sliding block (95) is slidably sleeved with a fixed rod (96), the fixed rod (96) is fixedly connected with the fixed seat (91), the outside of the fixed rod (96) is provided with a spring (97), and the inside of the fixed seat (91) is provided with an exhaust port (98).

6. The pressurized structure for improving the bending stability of a hollow piston rod according to claim 5, characterized in that: One end of the spring (97) is fixedly connected with the sliding block (95), and the other end of the spring (97) is fixedly connected with the fixed seat (91).

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