Steel bar riveting hydraulic cylinder

Abstract

The utility model discloses a reinforcing steel bar riveting hydraulic cylinder which comprises a cylinder body, a first clamp and a second clamp, a piston rod and a piston are arranged in the cylinder body in a sliding mode, a barrel body is arranged at one end of the piston rod, the first clamp is fixedly connected above the barrel body, the second clamp is arranged on the cylinder body, the cylinder body is of a barrel-shaped structure, and the outer wall of the cylinder body is in clearance fit with the inner wall of the barrel body. The cylinder body sleeves the outer side of the cylinder body; a guide sleeve is arranged on the front side of the cylinder body, a rear end cover is arranged on the rear side of the cylinder body, and a second cavity is formed between the cylinder body and the piston rod. A third cavity is formed between the piston and the rear end cover. And the piston body can be controlled to reciprocate through oil liquid, so that the first clamp is driven to move. The first clamp and the second clamp are provided with the connecting sleeve and the extrusion sleeve respectively, and the integrated oil cylinder structure in the mechanism ensures that the riveting oil cylinder is convenient to operate, higher in efficiency and smaller in failure rate in the riveting process.

Description

Technical Field

[0001] The utility model belongs to the technical field of hydraulic devices, and specifically relates to a steel bar riveting hydraulic cylinder. Background Art

[0002] Steel bar connection is a commonly used connection process and has been widely applied in bridges, high-rise buildings, large industrial infrastructure, etc., which involve reinforced concrete and large steel structure buildings. Currently, the general connection methods mainly include binding lap connection, welding connection, mechanical connection, etc. Among them, the binding lap connection method has become the main connection method due to its simple construction, high efficiency, and no damage. However, this connection method wastes too much steel bars and the connection part is prone to deformation. The electric welding connection method saves steel bars, but it is easy to damage the steel bars, and the connection quality is often affected by the lack of firmness, rust, and open welding at the interface, and the energy consumption is relatively high. Mechanical connection adopts methods such as conical sleeve axial connection, threaded connection, grouting sleeve connection, etc. The most commonly used threaded connection has poor on-site operability, and the joint performance is greatly affected by manual operation, and the joint performance is unstable. The grouting sleeve connection has high cost, great on-site operation difficulty, and great difficulty in detecting the installation quality of the joint. In a Chinese invention patent named a steel bar riveting system with the application publication number of CN114505425A, a riveting mechanism composed of a guiding mechanism, a riveting oil cylinder, a balance oil cylinder, a sliding pressure head, a fixed pressure head, and an opening and closing anvil is disclosed. This mechanism has problems such as more structural parts and hydraulic cylinders, higher cost and failure rate, and relatively loose overall structure.

[0003] In order to solve the above problems, we invented a steel bar riveting hydraulic cylinder. Summary of the Invention

[0004] In order to reduce costs, simplify the internal structure, reduce the risk of damage, improve the overall performance of the equipment and the steel bar riveting efficiency, the utility model provides a steel bar riveting hydraulic cylinder, which includes: a cylinder body, a first fixture, and a second fixture. A piston rod and a piston are slidably arranged in the cylinder body. One end of the piston rod is provided with a cylinder body. A first fixture is fixedly connected above the cylinder body. The second fixture is arranged on the cylinder body. The cylinder body is of a cylindrical structure. The outer wall of the cylinder body is in clearance fit with the inner wall of the cylinder body. The cylinder body is sleeved outside the cylinder body.

[0005] A guide sleeve is arranged on the front side of the cylinder body, and a rear end cover is arranged on the rear side of the cylinder body. A second cavity is formed between the cylinder body and the piston rod.

[0006] A third cavity is formed between the piston and the rear end cover.

[0007] Optionally, a limiting groove is opened on the inner wall of the cylinder body, a limiting key is arranged in the limiting groove, a vertical limiting surface is arranged on the front side of the cylinder body, an axial groove is arranged on the top of the cylinder body, and the first fixture moves axially and is limited between the two by the limiting key and the side wall of the cylinder body and moves between the two.

[0008] Optionally, a first oil port is provided on the rear end cover, a first oil passage in the front-rear direction is provided at the rear side of the first oil port, the first oil passage communicates with a second oil passage in the left-right direction, and the second oil passage communicates with the second cavity;

[0009] A second oil port is provided on the rear end cover, the second oil port communicates with a third oil passage in the front-rear direction, a fourth oil passage in the up-down direction is provided in the third oil passage, the fourth oil passage communicates with a fifth oil passage in the left-right direction, and the fifth oil passage communicates with the first cavity.

[0010] Optionally, the first fixture is connected to the upper side of the cylinder body by welding, and the second fixture is connected to the upper side of the cylinder block by welding.

[0011] Optionally, a fixing member is provided between the cylinder body and the first fixture.

[0012] Optionally, the first fixture and the second fixture include support columns and chucks. The bottom of the support column of the second fixture is fixedly connected to one side of the opening of the cylinder block and is restricted by the end of the cylinder body on one side;

[0013] A handle is provided at the bottom of the cylinder block.

[0014] The riveting mechanism of the present invention ensures that the system can be riveted smoothly without tilting. The integrated oil cylinder structure in the mechanism ensures that during the riveting process of the riveting oil cylinder, the force on the oil cylinder is equal to the riveting force, shortens the wheelbase of the equipment, reduces the volume, and at the same time ensures the stable riveting between the steel bars. The system of the present invention makes the connection between the steel bars more reliable, the system is easy to operate, has higher efficiency, and lower failure rate. Description of the Drawings

[0015] Figure 1 is a schematic internal structure diagram of the present utility model;

[0016] Figure 2 is a left view of the present utility model;

[0017] Figure 3 is a right view of the present utility model.

[0018] Wherein, 1. Cylinder block; 101. First cavity; 102. Second cavity; 103. Third cavity; 104. First annular groove; 105. Second annular groove; 106. Limit groove; 107. Flat key; 108. First oil port; 109. First oil passage; 110. Second oil passage; 111. Second oil port; 112. Third oil passage; 113. Fourth oil passage; 114. Fifth oil passage; 115. Third annular groove; 2. Piston rod; 3. Piston; 4. Cylinder body; 5. First fixture; 6. Second fixture; 7. Rear end cover; 8. Handle. Detailed Embodiment

[0019] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0020] The present utility model provides a Figures 1-3 reinforcing bar riveting hydraulic cylinder as shown, including a cylinder body 1, a first fixture 5 and a second fixture 6. A connecting sleeve is arranged on the first fixture 5, and an extrusion sleeve is arranged on the second fixture 6. A piston rod 2 and a piston 3 are slidably arranged in the cylinder body 1. The piston 3 and the piston rod 2 are fixedly connected. One end of the piston rod 2 is provided with a cylinder body 4. A first fixture 5 is fixedly connected above the cylinder body 4. A flat key 107 is arranged between the cylinder body 4 and the first fixture 5. The second fixture 6 is arranged on the cylinder body 1. The cylinder body 1 is of a cylindrical structure. There is a clearance fit between the outer wall of the cylinder body 1 and the inner wall of the cylinder body 4. The cylinder body 4 is sleeved outside the cylinder body 1. A guide sleeve is arranged on the front side of the cylinder body 1, and a rear end cover 7 is arranged on the rear side of the cylinder body 1. A cavity two 102 is formed between the cylinder body 1 and the piston rod 2; a cavity three 103 is formed between the piston 3 and the rear end cover 7.

[0021] As Figure 2 shown, a limiting groove 106 is opened on the inner wall of the cylinder body 4. A limiting key is arranged in the limiting groove 106. A vertical limiting surface is arranged on the front side of the cylinder body 1. An axial groove is arranged on the top of the cylinder body 1. The first fixture 5 moves axially and is limited by the limiting groove 106 and the end of the cylinder body 4 to move between the two, so that the cylinder body 4 fixedly connected to the first fixture 5 can only perform reciprocating lateral movement in the guide cylinder and will not perform rotational movement.

[0022] On the basis of the above embodiment, in a preferred embodiment, as Figure 1 and Figure 2 shown, a first oil port 108 is arranged on the rear end cover 7. A first oil passage 109 in the front-rear direction is arranged behind the first oil port 108. The first oil passage 109 communicates with a second oil passage 110 in the left-right direction. The second oil passage 110 communicates with the cavity three 103; a second oil port 111 is arranged on the rear end cover 7. The second oil port 111 communicates with a third oil passage 112 in the front-rear direction. A fourth oil passage 113 in the up-down direction is arranged in the third oil passage 112. The fourth oil passage 113 communicates with a fifth oil passage 114 in the left-right direction. The fifth oil passage 114 communicates with the cavity two 102.

[0023] There is a first annular groove 104 between the guide sleeve and the cylinder block 1, and a first sealing ring is installed in the first annular groove 104. A second annular groove 105 is provided between the guide sleeve and the piston rod 2, and a second sealing ring is installed in the second annular groove 105. A third annular groove 115 is formed between the piston 3 and the cylinder block 1 for installing a third sealing ring.

[0024] As Figure 3 shown, the first fixture 5 is connected to the upper side of the cylinder body 4 by welding, and the second fixture 6 is connected to the upper side of the cylinder block 1 by welding. The integrated design is more convenient for installation. The first fixture 5 and the second fixture 6 include support columns and chucks. The bottom of the support column of the second fixture 6 is fixedly connected to one side of the opening of the cylinder block 1 and is restricted by the end of the cylinder body 4 on one side; a handle 8 is provided at the bottom of the cylinder block 1.

[0025] The working mode is as follows:

[0026] As Figure 3 shown, place the steel bar riveting hydraulic cylinder horizontally, connect oil through the first oil passage 109, the oil enters through the first oil port 108, and the oil enters the second oil passage 110 from the first oil passage 109, and then enters the cavity three 103. At this time, the piston 3 moves to the left, driving the piston rod 2 to move to the left, driving the first fixture 5 to pull open the distance from the second fixture 6. At this time, the two steel bars are respectively sleeved into the connecting sleeve on the first fixture 5 and the extrusion sleeve on the second fixture 6. The cavity three 103 discharges oil. At this time, the oil enters through the second oil port 111, and enters the cavity two 102 through the third oil passage 112, the fourth oil passage 113 and the fifth oil passage 114, pushing the piston 3 to move to the right, driving the first fixture 5 to approach the second fixture 6. At this time, the connecting sleeve also slowly moves towards the extrusion sleeve. When the first and second fixtures 6 are tightly attached, the extrusion sleeve squeezes and tightens the connecting sleeve. At this time, the two steel bars are completed with riveting. Connect oil through the second oil passage 110 again, so that the riveting mechanism returns to the initial state, that is, the steel bar riveting work is completed.

[0027] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A steel bar riveting hydraulic cylinder, comprising a cylinder body (1), a first clamp (5) and a second clamp (6), wherein a piston rod (2) and a piston (3) are slidably arranged in the cylinder body (1), characterized in that: A cylinder (4) is provided at one end of the piston rod (2), a first clamp (5) is fixedly connected to the top of the cylinder (4), the second clamp (6) is provided on the cylinder (1), the cylinder (1) is a cylindrical structure, the outer wall of the cylinder (1) and the inner wall of the cylinder (4) are clearance-matched, and the cylinder (4) is sleeved on the outer side of the cylinder (1); A guide sleeve is provided on the front side of the cylinder body (1), a rear end cover (7) is provided on the rear side of the cylinder body (1), and a second cavity (102) is formed between the cylinder body (1) and the piston rod (2); A cavity three (103) is formed between the piston (3) and the rear end cover (7).

2. A steel bar riveting hydraulic cylinder according to claim 1, characterized in that: The inner wall of the cylinder (4) is provided with a limit groove (106), a limit key is arranged in the limit groove (106), the front side of the cylinder (1) is provided with a vertical limit surface, the top of the cylinder (1) is provided with an axial groove, and the first clamp (5) moves along the axial direction, and is limited by the limit key and the side wall of the cylinder (4), and moves between the two.

3. The steel bar riveting hydraulic cylinder according to claim 1, characterized in that: The rear end cover (7) is provided with a first oil port (108), a first oil passage (109) in the front-rear direction is provided at the rear side of the first oil port (108), the first oil passage (109) is connected to a second oil passage (110) in the left-right direction, and the second oil passage (110) is connected to the second cavity (102); The rear end cover (7) is provided with a second oil port (111), the second oil port (111) is connected to a third oil passage (112) in the front-to-rear direction, the third oil passage (112) is provided with a fourth oil passage (113) in the up-down direction, the fourth oil passage (113) is connected to a fifth oil passage (114) in the left-to-right direction, and the fifth oil passage (114) is connected to cavity one (101).

4. A steel bar riveting hydraulic cylinder according to claim 2, characterized in that: The first clamp (5) is connected to the upper side of the barrel (4) by welding, and the second clamp (6) is connected to the upper side of the cylinder (1) by welding.

5. A steel bar riveting hydraulic cylinder according to claim 4, characterized in that: A fixing member (107) is provided between the cylinder (4) and the first clamp (5).

6. A steel bar riveting hydraulic cylinder according to claim 5, characterized in that: The first clamp (5) and the second clamp (6) comprise a support column and a clamp head; the bottom of the support column of the second clamp (6) is fixedly connected to one side of the opening of the cylinder body (1) and one side is constrained by the end of the cylinder body (4); A handle (8) is provided at the bottom of the cylinder body (1).

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