Mechanical scratch protection device

Abstract

The application discloses a mechanical scratch-proof device, which comprises a rotating arm, a roller shaft assembly, a line blocking wheel assembly, a wear-resistant plate I and a wear-resistant plate II. The roller shaft assembly and the line blocking wheel assembly are respectively matched with the holes at the two ends of the rotating arm. The rear section of the line blocking wheel assembly is connected with the mounting seat on the wear-resistant plate I. The wear-resistant plate I is provided with an arc-shaped groove at the corresponding position of the roller shaft assembly. The rear section of the roller shaft assembly extends into the arc-shaped groove and has a small gap with the wear-resistant plate II. The roller shaft assembly can rotate a certain angle with the line blocking wheel assembly as the center and the arc-shaped groove as the path. The application can prevent the packing line from scratching the surface of the disc roll instantaneously when the packing line is tensioned, and the quality of the disc roll surface is well protected. Meanwhile, the application shortens the packing cycle of the automatic packing machine, has a higher cost performance and is lower in cost.

Description

Technical Field

[0001] This invention relates to steel rolling packaging equipment, specifically to an anti-scratch device for a vertical wire rod packaging machine, and belongs to a type of metallurgical steel rolling packaging machinery. Background Technology

[0002] Wire rod plays a vital role in many fields. It can be used as reinforcement in reinforced concrete and as welded structural components, and is one of the most widely used steel products. According to the relevant provisions of the "Compilation of National Packaging Standards", various types of finished metal products must be packaged into coils before leaving the factory within a certain specification range, and there are certain requirements for the tightness. Each type of steel has a corresponding packaging mechanism, and the wire rod baling machine is a mechanism that compresses and packages wire rod into coils.

[0003] Vertical wire baling machines are used for baling the end products of rolled steel wire. Currently, the anti-scratch devices of automatic baling machines mostly use hydraulic cylinders to drive rollers to open or close. The disadvantages of this type of hydraulic anti-scratch device are: 1. High cost of the hydraulic system; 2. Hydraulic components are prone to leakage, causing surface contamination of the baled product; 3. Hydraulic cylinders and other hydraulic actuators all require a hydraulic power station, which occupies a large area and requires dedicated space; 4. The timing of opening and closing of the device is controlled by hydraulic valves, resulting in poor synchronization between the device and the baling process, thus leading to a longer baling cycle. In short, existing anti-scratch devices are complex to install and have high maintenance costs. Summary of the Invention

[0004] The problem this invention aims to solve is to provide a mechanical anti-scratch device that prevents the packing thread from instantly scratching the surface of the coil when it is tightened during winding, thus effectively protecting the surface quality of the coil. At the same time, it shortens the packing cycle of automatic packing machines, offering higher cost-effectiveness.

[0005] This invention relates to a mechanical anti-scratch device, comprising a rotating arm, a roller assembly, a line-blocking wheel assembly, a wear-resistant plate I, and a wear-resistant plate II. The roller assembly and the line-blocking wheel assembly respectively mate with holes at both ends of the rotating arm. The rear section of the line-blocking wheel assembly is connected to a mounting seat on the wear-resistant plate I. An arc-shaped groove is formed at the position corresponding to the roller assembly on the wear-resistant plate I. The rear section of the roller assembly extends into the arc-shaped groove and has a slight gap with the wear-resistant plate II. The roller assembly can rotate a certain angle around the line-blocking wheel assembly as the center and along the arc-shaped groove as the path.

[0006] Furthermore, the roller assembly includes a roller shaft, a roller wheel, a spacer, and a double-row angular contact bearing. The roller wheel is located behind the rotating arm, and its inner bore consists of three sections with decreasing diameters from front to back. The double-row angular contact bearing mates with the largest bore of the roller wheel. The roller shaft is a three-section stepped shaft with a larger diameter in the middle and smaller diameters at both ends. The middle and rear sections mate with the middle and rear sections of the roller wheel's inner bore, the rear part of the front section mates with the double-row angular contact bearing, and the front part mates with a through hole at one end of the rotating arm. The spacer is fitted over the middle section of the roller shaft, and its front and rear end faces contact the rear end face of the rotating arm and the inner ring of the double-row angular contact bearing, respectively.

[0007] Furthermore, the roller assembly also includes a shaft elastic retaining ring, which is engaged in a groove at the front end of the roller and presses against the front end face of the rotating arm.

[0008] Furthermore, the roller assembly also includes a retaining ring for the bore, which is engaged in the groove of the roller and presses against the outer ring of the double-row angular contact bearing.

[0009] Furthermore, the outer circle of the roller is divided into two sections: the front section is a cylindrical surface, and the rear section is a conical surface that gradually decreases in size from front to back.

[0010] Furthermore, the line guide wheel assembly includes a mounting shaft, a lock nut, flange I, flange II, and a spring; the rotating arm has a stepped hole for the line guide wheel assembly, which is smaller in the middle and larger at both ends. Flange I and flange II both mate with the rear section of the stepped hole, and the two are engaged in a toothed fit; flange I is connected to the rotating arm by screws, and flange II is connected to the mounting base by screws; the mounting shaft is a three-section stepped shaft with a diameter that gradually increases from front to back. Its rear section mates with the inner hole of the mounting base, its middle section mates with the inner holes of both flange I and flange II, and its front section extends out of the rotating arm through the middle and front sections of the stepped hole. The spring is sleeved outside the small-diameter section of the mounting shaft, and its rear section is located inside the front section of the stepped hole; the lock nut is screwed onto the frontmost threaded section of the mounting shaft and compresses the spring.

[0011] Furthermore, the sides of flange I and flange II that form a jaw fit are beveled; the side of flange II has an opening that is wider at the front and narrower at the back.

[0012] Furthermore, the rear section of the mounting shaft has a square head, and the inner hole of the mounting base has a square inner hole; the two are mated through square surfaces.

[0013] Furthermore, the guide wheel assembly also includes a gasket set, which is fitted over the large-diameter section of the mounting shaft and located between flange II and the mounting base. Screws connect flange II, the gasket set, and the mounting base.

[0014] Furthermore, the line guide wheel assembly also includes two copper pads, one at the front and one at the rear. Both copper pads are fitted over the small-diameter section of the mounting shaft and respectively press against the front and rear end faces of the spring.

[0015] The advantages of the mechanical anti-scratch device of this invention are: 1. Anti-scratch is achieved through mechanical structure: When the baler retracts the wire, the roller at one end of the swing arm is subjected to the tightening force of the baling wire, which drives the flange I at the other end of the swing arm to move forward along the inclined surface of the flange II. The roller also moves forward. When the baling wire is no longer in contact with the roller, the baling wire is pulled out from the gap between the wear-resistant plate II and the roller assembly. The baling wire moves inward and closely adheres to the outer surface of the wire coil. Therefore, when the wire is tightened during retraction, the baling wire will not scratch the surface of the coil instantly, thus protecting the surface quality of the coil well. 2. The mechanical structure shortens the baling cycle of the automatic baler and eliminates the need for hydraulic valve control of the anti-scratch mechanism. 3. The mechanical spring mechanism replaces the hydraulic valve control, resulting in higher cost-effectiveness and lower cost. 4. Replacement and maintenance are more convenient, and the device is environmentally friendly and energy-efficient. Attached Figure Description

[0016] Figure 1 This is a front view of the mechanical anti-scratch device of the present invention; Figure 2 It is along Figure 1 Sectional view of line AA in the middle; Figure 3 yes Figure 1 Top view; Figure 4 This is a front view of the assembly of the rotating arm, roller assembly, and line guide wheel assembly; Figure 5 It is along Figure 4 Sectional view of the middle BB line; Figure 6 This is an exploded view of the roller assembly; Figure 7 This is an exploded view of the line guide wheel assembly; Figure 8 This is a schematic diagram of the mechanical anti-scratch device of the present invention installed on the lower pressure plate of a packing machine; Figure 9 This is a front view of the mechanical anti-scratch device of the present invention installed on the lower pressure plate of a packing machine; Figure 10 It is along Figure 9 A cross-sectional view of the CC line. Detailed Implementation

[0017] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0018] Example 1 from Figure 1 , Figure 2 , Figure 3As can be seen, the mechanical anti-scratch device of the present invention includes a rotating arm 1, a roller assembly 2, a line-blocking wheel assembly 3, a wear-resistant plate I 4, and a wear-resistant plate II 5; the roller assembly 2 and the line-blocking wheel assembly 3 are respectively fitted with holes at both ends of the rotating arm 1, the rear section of the line-blocking wheel assembly 3 is connected to the mounting seat on the wear-resistant plate I 4, the wear-resistant plate I 4 is provided with an arc-shaped groove at the position corresponding to the roller assembly 2, the rear section of the roller assembly 2 extends into the arc-shaped groove and has a small gap with the wear-resistant plate II 5; the roller assembly 2 can rotate a certain angle with the line-blocking wheel assembly 3 as the center and the arc-shaped groove as the path.

[0019] from Figure 1 , Figure 2 , Figure 3 , Figure 8 , Figure 9 , Figure 10 As can be seen, the mechanical anti-scratch device of the present invention is set on the upper part of the lower pressure plate of the vertical wire baling machine. Two mechanical anti-scratch devices are symmetrically arranged on each lower pressure plate, and the four lower pressure plates are evenly distributed along the circumference. Before the baling machine takes in the wire, the mechanical anti-scratch device is in a closed state. The baling wire is affected by the tension and is in contact with the bearing inside the wear-resistant plate I4 and wear-resistant plate II5. When the baling machine takes in the wire, the roller assembly 2 is subjected to the force of the baling wire along the circumferential direction. Under the action of the tightening force, the roller assembly 2 moves along the arc groove, causing the flange I33 in the other end of the swing arm 1 to rotate and move forward, thereby causing the roller assembly 2 to move forward. When the baling wire is no longer in contact with the roller assembly 2, the baling wire is pulled out from the gap between the wear-resistant plate II5 and the roller assembly 2. That is, the baling wire moves inward and is tightly attached to the outer surface of the wire coil. Therefore, when the wire is tightened during take-in, the baling wire will not scratch the surface of the coil instantly, so that the surface quality of the coil is well protected.

[0020] Example 2 from Figure 1 , Figure 2 , Figure 4 , Figure 5 , Figure 6 As can be seen, the mechanical anti-scratch device of the present invention includes: roller assembly 2 comprising roller 21, roller 22, spacer 23, and double-row angular contact bearing 24; roller 22 is located behind the rotating arm 1, and the inner hole of roller 22 is a three-section hole with the diameter decreasing from front to back, and double-row angular contact bearing 24 is fitted with the largest hole of roller 22; roller 21 is a three-section stepped shaft with a large middle section and small front and rear sections, the middle and rear sections are fitted with the middle and rear sections of the inner hole of roller 22, the rear part of the front section is fitted with double-row angular contact bearing 24, and the front part is fitted with a through hole at one end of rotating arm 1; spacer 23 is fitted outside the middle section of roller 21, and its front and rear end faces are in contact with the rear end face of rotating arm 1 and the inner ring of double-row angular contact bearing 24, respectively.

[0021] The middle and rear sections of the roller shaft 21 cooperate with the middle and rear sections of the inner hole of the roller 22 to form a stop, which can axially limit the roller shaft 21; the double-row angular contact bearing 24 can realize the synchronous rotation of the roller shaft 21 and the roller 22, thereby driving the rotating arm 1 to rotate; the spacer 23 can axially limit the double-row angular contact bearing 24 and prevent the rear end face of the rotating arm 1 from directly contacting the roller 22, so as to facilitate the rotation of the roller 22.

[0022] Example 3 from Figure 1 , Figure 2 , Figure 4 , Figure 5 , Figure 6 It is understood that the mechanical anti-scratch device of the present invention: the roller assembly 2 also includes a shaft elastic retaining ring 26, which is stuck in the groove of the front section of the roller 22 and presses against the front end face of the rotating arm 1.

[0023] The elastic retaining ring 26 axially limits the roller shaft 21 and makes the roller shaft 21 fit tightly with the rotating arm 1, so that the roller shaft 21 drives the rotating arm 1 to rotate.

[0024] Example 4 from Figure 1 , Figure 2 , Figure 4 , Figure 5 , Figure 6 It is understood that the mechanical anti-scratch device of the present invention: the roller assembly 2 also includes a hole elastic retaining ring 25, which is stuck in the groove of the roller 22 and presses against the outer ring of the double row angular contact bearing 24.

[0025] The elastic retaining ring 25 can axially limit the double-row angular contact bearing 24, ensuring the reliability of the contact between the double-row angular contact bearing 24 and the roller shaft 21.

[0026] Example 5 from Figure 1 , Figure 2 , Figure 4 , Figure 5 , Figure 6 It can be seen that the mechanical anti-scratch device of the present invention has the outer circle of roller 22 divided into two sections: the front section is a cylindrical surface and the rear section is a conical surface that gradually decreases in size from front to back.

[0027] The outer diameter of roller 22 is larger at the front and smaller at the back, which allows the packing line to be easily detached from roller 22 and pulled out from the gap between wear-resistant plate II5 and roller assembly 2.

[0028] Example 6 from Figure 1 , Figure 2 , Figure 4 , Figure 5 , Figure 7As can be seen, the mechanical anti-scratch device of the present invention includes: a line guide wheel assembly 3 comprising a mounting shaft 31, a locking nut 32, flange I 33, flange II 34, and a spring 35; the rotating arm 1 has a stepped hole for the line guide wheel assembly, which is smaller in the middle and larger at both ends; flange I 33 and flange II 34 both mate with the rear section of the stepped hole, and the two are engaged in a toothed engagement; flange I 33 is connected to the rotating arm 1 by screws, and flange II 34 is connected to the mounting base by screws; the mounting shaft 31 is a three-section stepped shaft with a diameter that gradually increases from front to back, the rear section mates with the inner hole of the mounting base, the middle section mates with the inner holes of flange I 33 and flange II 34, and the front section extends out of the rotating arm 1 through the middle and front sections of the stepped hole; the spring 35 is sleeved on the small diameter section of the mounting shaft 31, and its rear section is located in the front section of the stepped hole; the locking nut 32 is screwed onto the foremost threaded section of the mounting shaft 31 and compresses the spring 35.

[0029] Among them, the sides of flange I33 and flange II34 that are engaged in a toothed fit are beveled; the side of flange II34 has an opening that is larger at the front and smaller at the back; flange I33 is made of alloy steel, and flange II34 is made of copper alloy; spring 35 is a modular spring.

[0030] When roller 22 drives one end of rotating arm 1 to rotate, the other end of rotating arm 1 drives flange I 33 to rotate and move forward along the inclined surface of flange II 34, driving roller 22 to move forward to separate from the packing line, thereby achieving the packing of the wire. The side of flange II 34 is wider at the front and narrower at the back, which facilitates the forward and backward movement of flange I 33.

[0031] Example 7 from Figure 1 , Figure 2 , Figure 4 , Figure 5 , Figure 7 As can be seen, in the mechanical anti-scratch device of the present invention, the rear section of the mounting shaft 31 is a square head, and the inner hole of the mounting base is a square inner hole, and the two are fitted together by the square surfaces.

[0032] The rear section of the mounting shaft 31 is fitted with the inner hole of the mounting base through a square face, which ensures that the mounting shaft 31 will not rotate, thereby ensuring the rotation of the flange I 33.

[0033] Example 8 The mechanical anti-scratch device of the present invention: the line guide wheel assembly 3 also includes a gasket group 36, which is sleeved outside the large diameter section of the mounting shaft 31 and located between the flange II 34 and the mounting seat. Screws connect the flange II 34, the gasket group 36 and the mounting seat.

[0034] The gasket group 36 can adjust the initial position of the roller 22 to compensate for errors caused by the manufacturing and assembly of the equipment, ensuring that the packing wire can be smoothly pulled out during the winding process. At the same time, it can be adapted to packing wires of different diameters.

[0035] Example 9 The mechanical anti-scratch device of the present invention: the line guide wheel assembly 3 also includes a washer 38, which is fitted outside the small diameter section of the mounting shaft 31 and located behind the locking nut 32.

[0036] Washer 38 ensures that lock nut 32 can be tightened better.

[0037] Example 10 The mechanical anti-scratch device of the present invention: the line guide wheel assembly 3 also includes two copper pads 37 at the front and rear. The two copper pads 37 are both sleeved on the small diameter section of the mounting shaft 31 and respectively press the front and rear end faces of the spring 35.

[0038] from Figure 1 , Figure 2 , Figure 3 , Figure 8 , Figure 9 , Figure 10 As can be seen, the working principle of the mechanical anti-scratch device of this invention is as follows: Before the baler retracts the wire, the mechanical anti-scratch device is in a closed state, and the baling wire is in contact with the bearing inside the wear-resistant plate I4 and wear-resistant plate II5 due to the tension; when the baler retracts the wire, the roller 22 is subjected to the force of the baling wire in the circumferential direction. Under the action of the tightening force, the roller shaft 22 moves along the arc groove, driving the other end of the swing arm 1 to rotate, thereby driving the flange I33 to rotate. While rotating, the flange I33 moves forward along the inclined surface of the flange II34, thereby causing the roller shaft assembly 2 at one end of the swing arm 1 to move forward, and the roller 22 also moves forward accordingly. The forward movement puts the anti-scratch device in the open state. When the roller 22 separates from the packing line, that is, when the packing line is no longer in contact with the roller assembly 2, the packing line is pulled out from the gap between the wear-resistant plate II5 and the roller 22. The packing line moves inward and fits tightly against the outer surface of the wire coil. Therefore, when the wire is tightened, the packing line will not scratch the surface of the coil instantly, thus protecting the surface quality of the coil well. After the packing line is pulled out, the spring 35 releases the spring force, the flange I 33 moves backward and rotates in the opposite direction until it is completely fitted with the flange II 34, and the roller 22 also returns to its original position, putting the anti-scratch device in the closed state.

[0039] The advantages of the mechanical anti-scratch device of this invention are as follows: First, anti-scratch is achieved through a mechanical structure: When the baler retracts the wire, the roller 22 at one end of the swing arm 1 is subjected to the tightening force of the baling wire, which drives the flange I 33 at the other end of the swing arm 1 to move forward along the inclined surface of the flange II 34. Consequently, the roller assembly 2, together with the roller 22, also moves forward. When the baling wire is no longer in contact with the roller 22, the baling wire is pulled out from the gap between the wear-resistant plate II 5 and the roller assembly 2. The baling wire moves inward and closely adheres to the outer surface of the wire coil. Therefore, when the wire is tightened during retraction, the baling wire will not instantly scratch the surface of the coil, thus protecting the surface quality of the coil well. Second, the mechanical structure shortens the baling cycle of the automatic baler and eliminates the need for hydraulic valve control of the anti-scratch mechanism. Third, the mechanical spring mechanism replaces the hydraulic valve control, resulting in higher cost-effectiveness and lower cost. Fourth, replacement and maintenance are more convenient, and the device is environmentally friendly and energy-efficient. The mechanical anti-scratch device of this invention is not limited to use in vertical wire baling machines; it can be applied directly or with slight modifications to other baling machines.

Claims

1. A mechanical scratch protection device, characterized in that: It includes a rotating arm (1), a roller assembly (2), a guide wheel assembly (3), wear-resistant plate I (4), and wear-resistant plate II (5); the roller assembly (2) and the guide wheel assembly (3) are respectively fitted with the holes at both ends of the rotating arm (1), the rear section of the guide wheel assembly (3) is connected to the mounting seat on the wear-resistant plate I (4), the wear-resistant plate I (4) has an arc groove at the position corresponding to the roller assembly (2), the rear section of the roller assembly (2) extends into the arc groove and has a small gap with the wear-resistant plate II (5); the roller assembly (2) can rotate a certain angle with the guide wheel assembly (3) as the center and the arc groove as the path; the guide wheel The component (3) includes a mounting shaft (31), a locking nut (32), flange I (33), flange II (34), and a spring (35); the rotating arm (1) is provided with a stepped hole for the wire guide wheel assembly, which is smaller in the middle and larger at both ends. Flange I (33) and flange II (34) are both fitted with the rear section of the stepped hole, and the two are engaged in a toothed engagement; flange I (33) is connected to the rotating arm (1) by screws, and flange II (34) is connected to the mounting base by screws; the side of the toothed engagement between flange I (33) and flange II (34) is a bevel; the side of flange II (34) is an opening that is larger in the front and smaller in the back.

2. The mechanical scratch protection device of claim 1, wherein: The roller assembly (2) includes a roller (21), a roller (22), a spacer (23), and a double-row angular contact bearing (24). The roller (22) is located behind the rotating arm (1). The inner hole of the roller (22) is a three-section hole with a diameter that decreases from front to back. The double-row angular contact bearing (24) is fitted with the largest hole of the roller (22). The roller (21) is a three-section stepped shaft with a large middle section and small front and rear sections. The middle and rear sections are fitted with the middle and rear sections of the inner hole of the roller (22). The rear part of the front section is fitted with the double-row angular contact bearing (24), and the front part is fitted with the through hole at one end of the rotating arm (1). The spacer (23) is fitted outside the middle section of the roller (21). Its front and rear end faces are in contact with the rear end face of the rotating arm (1) and the inner ring of the double-row angular contact bearing (24), respectively.

3. A mechanical scratch protection device according to claim 2, characterized in that: The roller assembly (2) also includes a shaft elastic retaining ring (26), which is engaged in the groove at the front end of the roller (22) and presses against the front end face of the rotating arm (1).

4. The mechanical scratch protection device of claim 2, wherein: The roller assembly (2) also includes a retaining ring (25) for the bore, which is engaged in the groove of the roller (22) and presses against the outer ring of the double row angular contact bearing (24).

5. The mechanical scratch protection device of claim 2, wherein: The outer circle of the roller (22) is divided into two sections: the front section is a cylindrical surface and the rear section is a conical surface that gradually decreases in size from front to back.

6. The mechanical scratch protection device of claim 1, wherein: The mounting shaft (31) is a three-section stepped shaft with a diameter that gradually increases from front to back. Its rear section fits into the inner hole of the mounting seat, its middle section fits into the inner holes of both flange I (33) and flange II (34), and its front section extends out of the rotating arm (1) through the middle and front sections of the stepped hole. The spring (35) is sleeved on the small diameter section of the mounting shaft (31), and its rear section is located in the front section hole of the stepped hole. The locking nut (32) is screwed into the threaded section at the front of the mounting shaft (31) and compresses the spring (35).

7. The mechanical scratch protection device of claim 1, wherein: The rear section of the mounting shaft (31) is a square head, and the inner hole of the mounting base is a square inner hole. The two are mated by square surfaces.

8. The mechanical scratch protection device of claim 1, wherein: The wire baffle wheel assembly (3) further comprises a gasket set (36) which is sleeved outside the large diameter section of the mounting shaft (31) and located between the flange II (34) and the mounting base, and the flange II (34), the gasket set (36) and the mounting base are connected by screws.

9. The mechanical scratch protection device of claim 1, wherein: The wire baffle wheel assembly (3) further comprises two front and rear copper pads (37) which are both sleeved outside the small diameter section of the mounting shaft (31) and respectively press the front and rear end faces of the spring (35).

Images