Lifting arm and entry chain steel moving device

Abstract

The utility model relates to a lifting arm and entrance chain steel moving device, belong to the technical field of steel production technology. Lifting arm includes upper end connecting rod and lower end connecting rod, and upper end connecting rod is connected with lower end connecting rod through coupling, still includes gland, and the upper end of upper end connecting rod is connected with the upper end surface of upper end connecting rod through bolt, and the lower end of gland and the upper end of upper end connecting rod are respectively set up with a semicircle hole, and the butt joint of two semicircle holes is used for installing hydraulic cylinder joint axle, and the integral upper end connecting rod is set into the split type structure, when the wear and tear of gland or pin shaft appears, just need to remove bolt to remove gland, and the replacement of gland, pin shaft is convenient, need not adopt the way of knocking, and need not replace whole upper end connecting rod, effectively improve the maintenance efficiency, and reduce the maintenance cost.

Description

Technical Field

[0001] This utility model relates to the field of steel production technology, and in particular to a lifting arm and an inlet chain steel transfer device. Background Technology

[0002] In steel processing production lines, the inlet chain conveyor is a key mechanical device used to transfer steel from upstream conveying equipment (such as roller conveyors or loading platforms) to the inlet of downstream chain conveying equipment (such as four-segment chains or stepping chains). Its core function is to realize the position conversion, posture adjustment, and precise docking of the steel, ensuring that the steel enters the subsequent processing flow smoothly and accurately.

[0003] The lifting arm is the driving structure of the inlet chain moving steel device. The lifting arm includes an upper connecting rod, a lower connecting rod, and a coupling assembly. The upper connecting rod and the lower connecting rod are connected by a coupling. In daily production operation, the upper connecting rod is connected to the hydraulic cylinder lug and pin.

[0004] In daily production operations, the lifting arm completes a cycle approximately every 40 seconds, resulting in a high operating frequency. Connecting components such as pins and lugs are prone to wear under high-frequency operation, affecting the trolley's operating accuracy and even causing malfunctions. The existing upper connecting rod is a one-piece structure, making it difficult to replace pins, lugs, etc. It requires hammering to remove them, and if deformation occurs, it also requires gas cutting and heat melting. The replacement time is about 2-3 hours, which seriously affects work efficiency. In addition, when the pin hole of the upper connecting rod is severely worn, the entire piece needs to be replaced, which takes even longer and easily leads to wasted maintenance costs. Utility Model Content

[0005] To address the technical problem in the existing inlet chain moving steel device lifting arm, where the upper connecting rod is an integral structure and the pins, earrings, etc., are difficult to replace after wear, this utility model provides a lifting arm.

[0006] The technical solution of this utility model is as follows: This utility model provides a lifting arm, including an upper connecting rod and a lower connecting rod. The upper connecting rod is connected to the lower connecting rod via a coupling. It also includes a pressure cap, which is connected to the upper end face of the upper connecting rod via bolts. A semi-circular hole is opened at the lower end of the pressure cap and the upper end of the upper connecting rod, and the two semi-circular holes are joined together for installing the hydraulic cylinder joint shaft. The upper connecting rod is designed as a split structure. When the pressure cap or the pin is worn, the pressure cap can be removed simply by removing the bolts, which facilitates the replacement of the pressure cap and the pin without the need for hammering or replacing the entire upper connecting rod. This effectively improves maintenance efficiency and reduces maintenance costs.

[0007] Preferably, a bushing is installed between the two semi-circular holes, which reduces the wear between the hydraulic cylinder joint shaft and the upper connecting rod and the gland, thereby improving the service life of the upper connecting rod. After the bushing wears out, it can be directly replaced without replacing the gland and the upper connecting rod, effectively reducing maintenance costs.

[0008] Preferably, the outer diameter of the bushing is the same as the diameter of the semi-circular hole, so that the bushing and the semi-circular hole fit together tightly. The wear of the bushing replaces the wear of the semi-circular hole, thereby improving the service life of the gland and the upper connecting rod.

[0009] Preferably, a groove is provided on the side wall of the bushing, the groove extends along the axial direction of the bushing and penetrates through the side wall of the bushing, so as to ensure that the bushing can be pressed tightly after the gland is installed and tightened, so that the bushing and the semi-circular hole fit together tightly.

[0010] Preferably, the contact surfaces of the gland and the upper connecting rod are fitted with a stop, and the stop bears the main force, which effectively reduces the stress damage to the bolts and improves stability.

[0011] Preferably, the stop includes a convex stop and a concave stop, which are respectively located on the lower end face of the gland and the upper end face of the upper connecting rod, ensuring the docking accuracy and installation stability of the gland and the upper connecting rod.

[0012] Preferably, there are two pressure caps, which are arranged opposite each other, and the semi-circular holes on the two pressure caps are coaxially arranged for connection with the hydraulic cylinder.

[0013] Preferably, a washer is provided between the bolt and the gland to reduce wear between the bolt and the gland.

[0014] Preferably, the coupling is a split-type clamp coupling, which improves ease of use.

[0015] This utility model provides an inlet chain moving steel device, which adopts the above-mentioned lifting arm to reduce the wear of the upper connecting rod, reduce maintenance difficulty and maintenance cost.

[0016] As can be seen from the above technical solutions, the advantages of this utility model are: 1. The pressure cap is detachably installed on the upper connecting rod, transforming the traditional one-piece upper connecting rod into a separate structure. When the pressure cap or pin is worn, the pressure cap can be removed simply by removing the bolts, which facilitates the replacement of the pressure cap and pin without the need for hammering or replacing the entire upper connecting rod. This effectively improves maintenance efficiency and reduces maintenance costs.

[0017] 2. A bushing is installed between the two semi-circular holes. The outer diameter of the bushing is the same as the diameter of the semi-circular holes, so that the bushing and the semi-circular holes fit tightly together. The wear of the bushing replaces the wear of the semi-circular holes, thereby reducing the wear between the hydraulic cylinder joint shaft and the upper connecting rod and the pressure plate, which can improve the service life of the upper connecting rod. After the bushing wears out, it can be directly replaced without replacing the pressure plate and the upper connecting rod, effectively reducing maintenance costs. Attached Figure Description

[0018] To more clearly illustrate the technical solution of this utility model, the drawings used in the description 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.

[0019] Figure 1 This is a front view structural diagram of the lifting arm according to one or more embodiments of the present invention; Figure 2 This is a side view of the lifting arm according to one or more embodiments of the present invention. Figure 3 for Figure 1 A partially enlarged structural diagram of location A (the bushing is not shown). Figure 4 This is a structural schematic diagram of the bushing according to one or more embodiments of the present invention; The components represented by the various reference numerals in the diagram are: 1. Upper connecting rod; 2. Lower connecting rod; 3. Coupling; 4. Flat key; 5. Screw; 6. Bolt; 7. Washer; 8. Gland; 9. Semi-circular hole; 10. Bushing; 11. Groove; 12. Stop; 13. Raised stop; 14. Concave stop. Detailed Implementation

[0020] To make the objectives, features, and advantages of this utility model more apparent and understandable, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the specific embodiments. Obviously, the embodiments described below are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this patent, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this patent.

[0021] Example 1 In a typical embodiment of this utility model, such as Figures 1-4As shown, a lifting arm is proposed, including: an upper connecting rod 1, a lower connecting rod 2, a coupling 3, and a pressure cover 8. The upper connecting rod 1 is connected to the lower connecting rod 2 through the coupling 3. The pressure cover 8 is detachably connected to the upper end face of the upper connecting rod 1 through bolts 6. The pressure cover 8 has an ear plate structure and is used to connect with the hydraulic cylinder ear ring. A semi-circular hole 9 is opened at the lower end of the pressure cover 8 and the upper end of the upper connecting rod 1, and the two semi-circular holes 9 are joined to form a circular hole for installing a pin (which can also be understood as a hydraulic cylinder joint shaft).

[0022] There are two pressure caps 8, which are arranged opposite each other. Each pressure cap 8 is connected to the upper connecting rod 1 by two bolts 6. The semi-circular holes 9 on the two pressure caps 8 are arranged coaxially.

[0023] In this embodiment, the lower connecting rod 2 is an integral structure, that is, the earring structure is still fixed on the lower connecting rod 2 by welding or other methods. It can be understood that in other embodiments, the lower connecting rod 2 can also adopt the same split structure as the upper connecting rod 1, that is, it is used in conjunction with the pressure cap 8. The specific choice can be made according to actual needs, and no further restrictions are imposed here.

[0024] The traditional upper connecting rod 1 has been improved from an integrated structure to a split structure. When the cover 8 or the pin is worn, the cover 8 can be removed simply by removing the bolt 6. This makes it easier to replace the cover 8 and the pin without having to use a hammering method, and it also eliminates the need to replace the entire upper connecting rod 1. This effectively improves maintenance efficiency and reduces maintenance costs.

[0025] In this embodiment, the coupling 3 is a split-shell coupling, consisting of two axially split half-shells. The half-shells are made of materials such as cast iron, cast steel, or forged steel, possessing certain strength and rigidity to withstand the force generated when transmitting torque. The inner surfaces of the two half-shells are in contact with the outer surfaces of the shafts being connected, and are tightened with screws 5 to achieve a tight connection with the shafts. Keyways are provided in the connecting shafts of the upper connecting rod 1 and the lower connecting rod 2, as well as in the half-shells, for the installation of flat keys 4. The flat keys 4 are installed in the keyways between the shafts and the clamps to transmit torque, enhancing the reliability of the connection between the coupling and the shafts and preventing relative slippage between the clamps and the shafts. Specifically, the split-shell coupling uses the preload generated by tightening the bolts to tightly clamp the two half-shells onto the two shafts being connected, thereby generating friction between the contact surfaces of the clamps and the shafts, which is used to transmit torque. At the same time, the flat keys 4 play an auxiliary role in transmitting torque, further ensuring stable and reliable power transmission between the two shafts.

[0026] To reduce wear, washers 7 are provided between bolt 6 and gland 8, and between screw 5 and half of coupling 3.

[0027] In this embodiment, a bushing 10 is also installed between the pressure cap 8 and the upper connecting rod 1. The bushing 10 is detachably installed in the circular hole formed by the two semi-circular holes 9 of the pressure cap 8 and the upper connecting rod 1. The outer diameter of the bushing 10 is the same as the diameter of the semi-circular hole 9. For example, if the diameter of the semi-circular hole 9 is 60mm, then the outer diameter of the bushing 10 is φ60mm. The bushing 10 reduces the wear between the hydraulic cylinder joint shaft and the upper connecting rod 1 and the pressure cap 8, thereby improving the service life of the upper connecting rod 1. After the bushing 10 wears out, it can be directly replaced without replacing the pressure cap 8 and the upper connecting rod 1, effectively reducing maintenance costs.

[0028] like Figure 4 As shown, a groove 11 is provided on the side wall of the bushing 10. The groove 11 extends along the axial direction of the bushing 10 and penetrates through the side wall of the bushing 10 to ensure that the bushing 10 can be pressed tightly after the pressure cover 8 is installed and tightened. At the same time, the end face of the bushing 10 is positioned against the hydraulic cylinder spherical bearing.

[0029] The contact surfaces of the pressure cap 8 and the upper connecting rod 1 are fitted together by a stop 12, such as... Figure 3 As shown, the stop 12 includes a convex stop 13 and a concave stop 14. The convex stop 13 is located at the lower end face of the pressure cap 8, and the concave stop 14 is located at the upper end face of the upper connecting rod 1. The stop 12 bears the main force, which effectively reduces the force on the bolt 6 and improves stability.

[0030] It is understood that in other embodiments, the convex stop 13 may also be provided at the upper end face of the upper connecting rod 1, and the concave stop 14 may be provided at the lower end face of the pressure cap 8. The specific details can be determined according to the actual design requirements, and no further restrictions are imposed here.

[0031] Example 2 In a typical embodiment of this utility model, an inlet chain moving steel device is proposed, which adopts the lifting arm mentioned in Embodiment 1 to reduce the wear of the upper connecting rod 1, reduce maintenance difficulty and maintenance cost.

[0032] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A lifting boom, comprising: The upper connecting rod (1) and the lower connecting rod (2) are connected to the lower connecting rod (2) by a coupling (3). The feature is that it also includes a pressure cap (8), which is connected to the upper end face of the upper connecting rod (1) by a bolt (6). A semi-circular hole (9) is opened at the lower end of the pressure cap (8) and the upper end of the upper connecting rod (1). The two semi-circular holes (9) are connected together for installing the hydraulic cylinder joint shaft.

2. The lifting arm according to claim 1, characterized in that, A bushing (10) is installed between the two semi-circular holes (9).

3. The lifting arm according to claim 2, characterized in that, The outer diameter of the bushing (10) is the same as the diameter of the semi-circular hole (9).

4. The lifting arm according to claim 2, characterized in that, A slot (11) is provided on the side wall of the bushing (10). The slot (11) extends along the axial direction of the bushing (10) and penetrates the side wall of the bushing (10).

5. The lifting arm according to claim 1, characterized in that, The contact surfaces of the pressure cap (8) and the upper connecting rod (1) are fitted by a stop (12).

6. The lifting arm according to claim 5, characterized in that, The stop (12) includes a convex stop (13) and a concave stop (14), which are respectively located on the lower end face of the pressure cap (8) and the upper end face of the upper connecting rod (1).

7. The lifting arm according to claim 1, characterized in that, There are two pressure caps (8), which are arranged opposite each other, and the semi-circular holes (9) on the two pressure caps (8) are arranged coaxially.

8. The lifting arm according to claim 1, characterized in that, A washer (7) is provided between the bolt (6) and the gland (8).

9. The lifting arm according to claim 1, characterized in that, The coupling (3) is a split-type clamp coupling.

10. An inlet chain steel transfer device, characterized in that, Includes the lifting arm as described in any one of claims 1-9.

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