A welded cylinder structure

Abstract

The utility model discloses a kind of welding cylinder structure, it is related to hydraulic cylinder technical field, specifically including cylinder, the front end of cylinder is welded with front mounting end cover, the rear end of cylinder is welded with rear mounting end cover, front mounting end cover is detachably connected with front end cover by bolt, rear mounting end cover is detachably connected with rear end cover by bolt.The welding cylinder structure, rear mounting end cover and front mounting end cover are connected with cylinder using the mode of welding respectively, can be prepared separately, when welding, rear mounting end cover has outer cutting surface and inner cutting surface between cylinder, the stability of welding can be improved by the mutual interference of two, while welding, welding waste can overflow in first overflow groove and second overflow groove, not only can guarantee the stability of welding also can reduce the unattractive caused by waste overflow, front mounting end cover is clamped on cylinder using the mode of two half butt joint, after welding, it can be limited by protruding tooth and buckle groove, guarantee the stability of welding.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic cylinder technology, specifically to a welded cylinder body structure. 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. The output force of a hydraulic cylinder is directly proportional to the effective area of ​​the piston and the pressure difference between its two sides. A hydraulic cylinder basically consists of a cylinder barrel and cylinder head, a piston and piston rod, a sealing device, a cushioning device, and a venting device. The cushioning and venting devices are optional depending on the specific application, while the other devices are essential.

[0003] The original general-purpose cylinder block manufacturing process typically uses gray cast iron and ductile iron as materials and employs casting technology. However, this has the following drawbacks: the product is heavy under the same strength, resulting in material waste; molds are required, making it unsuitable for single-piece production; cylinder blocks produced using traditional welding methods are generally directly welded, which leads to easy breakage at the weld seam or a large amount of waste, affecting the aesthetics. Therefore, we have proposed an improvement and a welded cylinder block structure. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a welded cylinder structure, solving the problem of manufacturing using casting processes as mentioned in the background section. However, it has the following drawbacks: under the same strength, the product is heavy, resulting in material waste; molds are required, making it unsuitable for single-piece production; cylinders produced using traditional welding methods are generally directly welded, which leads to easy breakage at the weld seam or a large amount of waste.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution: a welded cylinder structure, including a cylinder body, a front mounting end cap welded to the front end of the cylinder body, a rear mounting end cap welded to the rear end of the cylinder body, a front end cap detachably connected to the front mounting end cap by bolts, and a rear end cap detachably connected to the rear mounting end cap by bolts. The use of a split welding method can reduce the cost of molds and the difficulty of mold preparation, and facilitate the preparation of large hydraulic cylinder bodies.

[0006] Optionally, the side walls of the front end cover and the rear end cover are respectively equipped with injection connectors, which are connected to the cylinder body. The injection connectors can inject hydraulic oil to drive the piston movement.

[0007] Optionally, one end of the cylinder has an insertion protrusion, and the inner wall of the rear mounting end cover has a slot. A sealing ring is engaged between the insertion protrusion and the slot. A buffer rubber sheet is fixedly installed on the inner wall of the rear end cover. The buffer rubber sheet can play a role in shock absorption and buffering when the piston slides. The insertion protrusion and the slot are engaged and fixed, which facilitates installation.

[0008] Optionally, the insertion protrusion has an outer cutting surface facing outward, and the slot has an inner cutting surface inclined towards the inner wall. The mutual contact between the outer and inner cutting surfaces can improve the stability of the welding and ensure the tightness of the overall welding.

[0009] Optionally, the inner wall of the rear end cover has an inwardly opening first overflow groove, and the outer wall of the insertion protrusion has an outwardly opening second overflow groove. A receiving chamber can be formed between the first overflow groove and the second overflow groove, and welding waste can overflow into the first overflow groove and the second overflow groove, thereby improving the stability and aesthetics of the welding.

[0010] Optionally, the front mounting end cap includes a left half-ring and a right half-ring. The inner sidewall of the left half-ring and the right half-ring, as well as one end of the outer wall of the cylinder body, have outwardly extending protruding teeth. The cross-section of the protruding teeth is trapezoidal. The left half-ring, the right half-ring, and the outer wall of the cylinder body are respectively provided with snap-fit ​​grooves that are adapted to the protruding teeth. The protruding teeth are snapped and fixed with the snap-fit ​​grooves, which can improve the stability of installation and reduce the risk of separation.

[0011] Optionally, the inner walls of the left and right half rings also have mounting grooves, and a sealing ring is snapped into the inner wall of the mounting groove. After the left and right half rings are welded to the cylinder body, the sealing ring is squeezed to make the sealing ring change to seal the gap between the left and right half rings and the cylinder body. Through the action of the sealing ring, the risk of weld leakage can be reduced.

[0012] This utility model provides a welded cylinder structure, which has the following beneficial effects: This welded cylinder structure comprises a cylinder body, a front mounting end cap, a front end cap, a rear mounting end cap, and a rear end cap. The rear and front mounting end caps are welded to the cylinder body, allowing for individual fabrication and reducing the difficulty of overall fabrication. This design is suitable for the production of large cylinder bodies. During welding, the rear mounting end cap has external and internal cutting surfaces that abut against each other, improving welding stability. Welding waste can overflow into the first and second overflow grooves, ensuring welding stability and reducing unsightly overflow. The front mounting end cap is attached to the cylinder body in a two-part butt joint configuration. After welding, it is secured by protruding teeth and snap-fit ​​grooves, ensuring welding stability. The welded cylinder body is further sealed with a sealing ring and a sealing collar, reducing the risk of weld leakage. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic cross-sectional view of the present invention. Figure 3 This is a side view of the structure of this utility model; Figure 4 This is a schematic cross-sectional view of the present invention. Figure 5 This utility model Figure 4 Enlarged view of point A in the middle; Figure 6 This utility model Figure 4 Enlarged view of section B in the middle.

[0014] In the diagram: 1. Cylinder body; 2. Front mounting end cap; 21. Left half ring; 22. Right half ring; 23. Raised tooth; 24. Snap-fit ​​groove; 25. Mounting groove; 3. Rear mounting end cap; 4. Front end cap; 5. Rear end cap; 6. Injection connector; 7. Insertion protrusion; 8. Slot; 9. Sealing ring one; 10. Buffer rubber sheet; 11. Outer cutting surface; 12. Inner cutting surface; 13. Second overflow groove; 14. First overflow groove; 15. Sealing ring. Detailed Implementation

[0015] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this disclosure. Rather, they are merely examples of apparatuses consistent with some aspects of this disclosure as detailed in the appended claims.

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0017] Please see Figures 1 to 6 This utility model provides a technical solution: a welded cylinder structure, including a cylinder 1, a front mounting end cover 2 welded to the front end of the cylinder 1, a rear mounting end cover 3 welded to the rear end of the cylinder 1, a front end cover 4 detachably connected to the front mounting end cover 2 by bolts, and a rear end cover 5 detachably connected to the rear mounting end cover 3 by bolts. The use of a split welding method can reduce the cost of molds and the difficulty of mold preparation, and facilitate the preparation of large hydraulic cylinders.

[0018] As a preferred embodiment, based on the above method, the front cover 4 and the rear cover 5 are further provided with injection connectors 6 on their side walls. The injection connectors 6 are connected to the cylinder body 1 and can inject hydraulic oil to drive the piston movement.

[0019] One end of the cylinder body 1 has an insertion protrusion 7, and the inner side wall of the rear end cover 3 is provided with a slot 8. A sealing ring 9 is engaged between the insertion protrusion 7 and the slot 8. A buffer rubber sheet 10 is fixedly installed on the inner side wall of the rear end cover 5. The buffer rubber sheet 10 can play the role of shock absorption and buffer when the piston slides. The insertion protrusion 7 and the slot 8 are engaged and fixed, which is convenient for installation.

[0020] The insertion protrusion 7 has an outer cutting surface 11 facing outward, and the slot 8 has an inner cutting surface 12 inclined towards the inner wall. The outer cutting surface 11 and the inner cutting surface 12 abut against each other, which can improve the stability of the welding and ensure the tightness of the overall welding. The inner side wall of the rear cover 5 has a first overflow groove 14 opening inward, and the outer wall of the insertion protrusion 7 has a second overflow groove 13 opening outward. A receiving chamber can be formed between the first overflow groove 14 and the second overflow groove 13, and welding waste can overflow into the first overflow groove 14 and the second overflow groove 13, improving the stability and aesthetics of the welding.

[0021] As a preferred embodiment, based on the above method, the front mounting end cover 2 further includes a left half ring 21 and a right half ring 22. The inner sidewalls of the left half ring 21 and the right half ring 22 and one end of the outer wall of the cylinder 1 are respectively provided with outwardly extending protruding teeth 23. The cross-section of the protruding teeth 23 is trapezoidal. The left half ring 21, the right half ring 22 and the outer wall of the cylinder 1 are respectively provided with snap-fit ​​grooves 24 that are adapted to the protruding teeth 23. The protruding teeth 23 are snapped and fixed with the snap-fit ​​grooves 24, which can improve the stability of installation and reduce the risk of separation.

[0022] The inner walls of the left half ring 21 and the right half ring 22 also have mounting grooves 25. A sealing ring 15 is snapped into the inner wall of the mounting groove 25. After the left half ring 21 and the right half ring 22 are welded to the cylinder body 1, the sealing ring 15 is squeezed to deform the sealing ring 15 to seal the gap between the left half ring 21, the right half ring 22 and the cylinder body 1. Through the action of the sealing ring 15, the risk of weld leakage can be reduced.

[0023] In summary, this welded cylinder structure allows for the rear end cap 3 and the front end cap 2 to be welded to the cylinder body 1 during use. These components can be manufactured separately, reducing the difficulty of overall manufacturing and making it suitable for the production of large cylinders. During welding, the rear end cap 3 and the cylinder body 1 have an outer cutting surface 11 and an inner cutting surface 12, which abut against each other, improving welding stability. Simultaneously, welding waste can overflow into the first overflow groove 14 and the second overflow groove 13, ensuring welding stability and reducing unsightly overflow. The front end cap 2 is attached to the cylinder body in a two-part butt joint manner. After welding, it can be restricted by the protruding teeth 23 and the snap-fit ​​groove 24, ensuring welding stability. The welded cylinder body can also be sealed by the sealing ring 15 and the sealing ring 9, reducing the risk of weld leakage.

[0024] 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 welded cylinder body structure, characterized in that: The cylinder includes a cylinder body (1), a front mounting end cap (2) is welded to the front end of the cylinder body (1), a rear mounting end cap (3) is welded to the rear end of the cylinder body (1), the front mounting end cap (2) is detachably connected to a front end cap (4) by bolts, and the rear mounting end cap (3) is detachably connected to a rear end cap (5) by bolts.

2. The welded cylinder structure according to claim 1, characterized in that: The side walls of the front cover (4) and the rear cover (5) are respectively equipped with injection connectors (6), and the injection connectors (6) are respectively connected to the cylinder body (1).

3. The welded cylinder structure according to claim 1, characterized in that: One end of the cylinder (1) has an insertion protrusion (7), the inner wall of the rear end cover (3) has a slot (8), a sealing ring (9) is engaged between the insertion protrusion (7) and the slot (8), and a buffer rubber sheet (10) is fixedly installed on the inner wall of the rear end cover (5).

4. The welded cylinder structure according to claim 3, characterized in that: The insertion protrusion (7) has an outer cutting surface (11) facing outward, and the slot (8) has an inner cutting surface (12) inclined towards the inner wall.

5. The welded cylinder structure according to claim 4, characterized in that: The inner wall of the rear end cover (5) has an inwardly opening first overflow groove (14), and the outer wall of the insertion protrusion (7) has an outwardly opening second overflow groove (13).

6. The welded cylinder structure according to claim 1, characterized in that: The front mounting end cap (2) includes a left half ring (21) and a right half ring (22). The inner sidewalls of the left half ring (21) and the right half ring (22) and one end of the outer wall of the cylinder (1) have outwardly extending protruding teeth (23). The cross-section of the protruding teeth (23) is trapezoidal. The left half ring (21) and the right half ring (22) and the outer wall of the cylinder (1) are respectively provided with snap-fit ​​grooves (24) that are adapted to the protruding teeth (23).

7. A welded cylinder structure according to claim 6, characterized in that: The inner walls of the left half ring (21) and the right half ring (22) also have mounting grooves (25), and the inner walls of the mounting grooves (25) are fitted with sealing rings (15). After the left half ring (21) and the right half ring (22) are welded to the cylinder body (1), the sealing rings (15) are squeezed to deform the sealing rings (15) to close the gap between the left half ring (21), the right half ring (22) and the cylinder body (1).

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