Connecting pin device capable of preventing movement and saving insertion and extraction labor

Abstract

The utility model relates to a connecting pin device capable of preventing movement and saving insertion and extraction labor, which comprises a drawing roller floor pin seat, a pushing roller floor pin seat and a connecting pin, a web plate of the drawing roller floor pin seat is provided with a double-aperture pin hole and a long slotted hole, and a web plate of the pushing roller floor pin seat is provided with two round pin holes. The connecting pin penetrates through the double-aperture pin hole and the round pin hole to be connected with the drawing roller floor pin seat and the pushing roller floor pin seat, a limiting ring groove is formed in one end of the connecting pin, the limiting ring groove is provided with a connecting pin baffle for limiting, the connecting pin baffle is provided with a seat baffle for limiting, and an inserting opening is formed in one side of the seat baffle and inserted into a pushing roller floor pin seat web. The connecting pin has the advantages that the connecting pin is prevented from moving back and forth in the axis direction, the connecting pin is prevented from falling off due to vibration, the connecting reliability of the push roller floor pin seat and the pull roller floor pin seat is enhanced, the workload of production personnel is reduced, and potential safety hazards are eliminated.

Description

Technical Field

[0001] The utility model relates to the technical field of metal rolling, in particular to a connecting pin device for preventing crosstalk and facilitating labor-saving plugging and unplugging. Background Art

[0002] During the production of a four-high hot strip rolling mill, roll changing operation is required. For rapid roll changing, two roll-changing floors with rail tracks are needed. When changing rolls, first align the rail tracks of the empty roll-removing floor with the rail tracks inside the rolling mill and remove the old roll, then translate the floor to align the rail tracks of the roll-pushing floor with the rail tracks inside the rolling mill and then push the new roll into the rolling mill (as Figure 11 shown), the problem is that the two connecting pin seats (as Figure 10 shown) used to connect the work roll changing floor often self-displace out of the pin seats during the frequent movement of the roll-changing floor, resulting in uneven force, phenomena such as "forking" of the floor, which causes inability to change rolls and other safety problems.

[0003] The connecting pins of the roll-changing floor pin seats cannot be pulled out of the pin seats smoothly, or when reconnecting the floor, the connecting pins cannot be inserted smoothly, which increases a lot of workload for production personnel and poses considerable safety hazards to the personnel and equipment operation. Summary of the Invention

[0004] In order to overcome the problems of the prior art, the utility model provides a connecting pin device for preventing crosstalk and facilitating labor-saving plugging and unplugging. By improving the structural form of the connecting pin, on the premise of maintaining the original design function and not affecting the use of related equipment, the connecting pin with a limiting ring groove is inserted into the double-aperture pin holes of the roll-removing floor pin seat and the round pin holes of the roll-pushing floor pin seat to connect the roll-pushing floor pin seat and the roll-removing floor pin seat. Limited by the connecting pin baffle, the connecting pin cannot displace out of the pin hole arbitrarily, ensuring the stable connection of the roll-changing floor. Inserting / removing the connecting pin into / from the double-aperture pin hole is not restricted by misalignment, and the connecting pin can be plugged and unplugged easily and freely, reducing the workload of production personnel and eliminating safety hazards.

[0005] To achieve the above object, the utility model is realized by adopting the following technical solutions:

[0006] A connecting pin device for preventing crosstalk and facilitating labor-saving plugging and unplugging, including a roll-removing floor pin seat, a roll-pushing floor pin seat and a connecting pin. The web of the roll-removing floor pin seat is provided with double-aperture pin holes and long slot holes, the abdomen of the roll-pushing floor pin seat is provided with two round pin holes. The connecting pin passes through the double-aperture pin holes and the round pin holes to connect the roll-removing floor pin seat and the roll-pushing floor pin seat. A limiting ring groove is arranged at one end of the connecting pin, and the limiting ring groove is limited by a connecting pin baffle. The connecting pin baffle is limited by a seat baffle. One side of the seat baffle is provided with a socket inserted into the web of the roll-pushing floor pin seat, and the end face abuts against the end face of the web of the roll-removing floor pin seat.

[0007] Furthermore, the connecting pin device further includes a tension pin, and the tension pin connects the long slot hole of the drawing roll floor pin seat and the round pin hole of the pushing roll floor pin seat.

[0008] Furthermore, a semi-circular pin slot is provided at the bottom of one side of the connecting pin baffle.

[0009] Furthermore, a baffle guiding device is provided at the top of the web of the pushing roll floor pin seat.

[0010] Furthermore, the double-aperture pin hole is formed by two circular holes with unequal diameters and non-concentric axes sleeved side by side, and the length of the center line of the two circular holes is less than the radius of the small-diameter circular hole.

[0011] Furthermore, the diameter of the small hole of the double-aperture pin hole is equal to the diameter of the round pin hole.

[0012] Furthermore, the radius of the long slot hole is equal to the radius of the round pin hole.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0014] 1. Through the cooperation of the limit ring groove of the connecting pin and the connecting pin baffle for limiting, it prevents the connecting pin from moving back and forth along the axial direction, prevents the connecting pin from falling off due to vibration, strengthens the connection reliability between the pushing roll floor pin seat and the drawing roll floor pin seat, prevents the "forking" accident of the two roll-changing floorboards during the roll-changing process due to the falling off of the connecting pin, and ensures the smooth progress of roll-changing.

[0015] 2. The double-aperture pin hole avoids the limitation of misalignment when inserting / removing the connecting pin, and the connecting pin can be inserted and removed easily and freely, reducing the workload of production personnel and eliminating potential safety hazards.

[0016] 3. The seat baffle limits the relative position of the connection between the pushing roll floor pin seat and the drawing roll floor pin seat, and at the same time cooperates to limit the position of the connecting pin baffle and the connecting pin, so that the connecting pin is fixed in the bottom semi-circular pin slot of the connecting pin baffle. The limiting structure is simple, the limiting is accurate, the pushing roll floor pin seat and the drawing roll floor pin seat are fixedly connected, the pin seats are uniformly stressed, the operation is stable, and the continuous and orderly progress of roll-changing is ensured. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural diagram of a connecting pin device for preventing crosstalk and facilitating labor-saving insertion and removal according to the present utility model.

[0018] Figure 2 is a front view of the structural diagram of a connecting pin device for preventing crosstalk and facilitating labor-saving insertion and removal according to the present utility model.

[0019] Figure 3 is a schematic structural diagram of the tension pin connection according to the present utility model.

[0020] Figure 4 It is a schematic structural diagram of the connecting pin described in the present utility model.

[0021] Figure 5 It is a schematic structural diagram of the roll-pulling floor pin seat described in the present utility model.

[0022] Figure 6 It is a front view of the roll-pulling floor pin seat described in the present utility model.

[0023] Figure 7 It is a schematic structural diagram of the roll-pushing floor pin seat described in the present utility model.

[0024] Figure 8 It is a schematic structural diagram of the connecting pin baffle described in the present utility model.

[0025] Figure 9 It is a schematic structural diagram of the seat baffle described in the present utility model.

[0026] Figure 10 It is a schematic structural diagram of the traditional roll-changing floor pin seat described in the present utility model.

[0027] Figure 11 It is a schematic structural diagram of the roll-changing working structure of the roll-changing floor described in the present utility model.

[0028] In the figure: 1 is the roll-pushing floor pin seat; 1.1 is the round pin hole; 2 is the roll-pulling floor pin seat; 2.1 is the double-aperture pin hole; 2.2 is the long slot hole; 3 is the connecting pin; 3.1 is the limit ring groove; 4 is the tension pin; 5 is the connecting pin baffle; 5.1 is the opening; 5.2 is the semi-circular pin slot; 6 is the seat baffle; 6.1 is the socket; 7 is the baffle guiding device; 8 is the roll-changing floor pin seat; 9 is the pin shaft; 10 is the roll-changing floor. Specific embodiments

[0029] The following further describes the specific embodiments of the present utility model in conjunction with the accompanying drawings:

[0030] Such as Figures 1 - 9As shown in the figure, the working principle of a connecting pin device that prevents movement and is labor-saving for insertion and extraction: The large-diameter hole of the double-aperture pin hole 2.1 on the web of the shaft roller floor pin seat 2 is concentric with the round pin hole 1.1 on the web of the push roller floor pin seat 1. Insert the connecting pin 3 into the concentric pin holes. The limit ring groove 3.1 of the connecting pin 3 extends out of the pin hole to cooperate with the installation of the connecting pin baffle 5. The seat baffle 6 is inserted into the web of the push roller floor pin seat at the rear end of the opening 5.1 of the connecting pin baffle 5. One end face of the two end faces of the seat baffle 6 contacts one end face of the push roller floor pin seat 1, and the other end face abuts against the web end face of the extraction roller floor pin seat. The connection distance between the push roller floor pin seat 1 and the extraction roller floor pin seat 2 is restricted by the seat baffle 6. The extraction roller floor pin seat 2 is forced to move away from the push roller floor pin seat 1 due to the restriction of the connection distance by the insertion of the seat baffle 6. The double-aperture pin hole 2.1 also moves away. The round pin hole 1.1 gradually becomes concentric with the small-diameter hole of the double-aperture pin hole 2.1. The coincidence position is the limit position of the seat baffle 6. The push roller floor pin seat 1 and the extraction roller floor pin seat 2 are locked and fixed. The end face of the connecting pin baffle 5 also abuts against the end face of the seat baffle 6. Under the push of the seat baffle 6, the limit ring groove 3.1 of the connecting pin 3 is limited and fixed in the semi-circular pin groove 5.2 of the opening 5.1 of the connecting pin baffle 5.

[0031] As Figures 1 - 11As shown in the figure, a connecting pin device for preventing movement and facilitating labor-saving plugging and unplugging includes a draw roll floor pin seat 2, a push roll floor pin seat 1, and a connecting pin 3. The web of the draw roll floor pin seat 2 is vertically provided with a double-aperture pin hole 2.1 and a long slot hole 2.2. The abdomen of the push roll floor pin seat 1 is vertically provided with two round pin holes 1.1. The connecting pin 3 passes through the double-aperture pin hole 2.1 and the round pin hole 1.1 to connect the push roll floor pin seat 1 and the draw roll floor pin seat 2. At the beginning of connecting the push roll floor pin seat 1 and the draw roll floor pin shaft 2, the center of the large aperture of the double-aperture pin hole 2.1 is concentric with the round pin hole 1.1. The connecting pin 3 is not affected by eccentricity or deformation, and is easy to plug and unplug, and the connection is fast. After connection, when the roll-changing floor 10 is pushed, the center of the small aperture of the double-aperture pin hole 2.1 is concentric with the round pin hole 1.1. The connecting pin 3 connecting the two pin holes moves from the center of the large aperture of the double-aperture pin hole 2.1 to the center position of the small aperture of the double-aperture pin hole 2.1. At this time, after the connecting pin baffle 5 is installed on the connecting pin 3, the connecting pin 3 cannot move in the axial direction. Limited by the seat baffle 6, the connecting pin 3 is fixed at the position of the round pin hole 1.1 and the center of the small aperture of the double-aperture pin hole 2.1, achieving the connection and fixation of the push roll floor pin seat 1 and the draw roll floor pin seat 2. One end of the connecting pin 3 is provided with a limit ring groove 3.1, and the limit ring groove 3.1 is cooperatively provided with the connecting pin baffle 5 for limiting. The connecting pin baffle 5 is provided with the seat baffle 6 for limiting. The socket 6.1 on one side of the seat baffle 6 is inserted into the web of the push roll floor pin seat 1, and the end face abuts against the end face of the web of the draw roll floor pin seat 2. While the seat baffle 6 limits the positions of the draw roll floor pin seat 2 and the push roll floor pin seat 1, it also limits the position between the connecting pin baffle 5 and the connecting pin 3, making the entire connecting pin device connected and fixed, and the connecting pin 3 cannot move, avoiding the occurrence of accidents such as the pin shaft 9 connected by the traditional roll-changing floor pin seat 8 vibrating and falling off during roll change.

[0032] As Figure 3 shown, further, the connecting pin device further includes a tension pin 4. The tension pin 4 connects the long slot hole 2.2 of the draw roll floor pin seat 2 and the round pin hole 1.1 of the push roll floor pin seat 1. The tension pin 4 is used as a temporary connection when the connecting pin 3 needs to be pulled out and the push roll floor pin seat 1 and the draw roll floor pin seat 2 are disassembled, avoiding the movement of the two roll-changing floors 10 during the removal of the connecting pin 3.

[0033] As Figure 8 shown, further, a semi-circular pin slot 5.1 is provided at the bottom of the open side of the connecting pin baffle 5.

[0034] As Figure 7 shown, further, a baffle guiding device 7 is provided at the top of the web of the push roll floor pin seat 1. The baffle guiding device 7 sets the falling position of the seat baffle 6.

[0035] As Figures 5 - 6As shown, further, the double-aperture pin hole 2.1 is formed by two circular holes with unequal diameters and non-coaxial centers sleeved side by side, and the length of the center lines of the two circular holes is less than the radius of the circular hole with the smaller diameter.

[0036] Further, the diameter of the small hole of the double-aperture pin hole 2.1 is equal to the diameter of the circular pin hole 1.1.

[0037] Further, the radius of the long slot hole 2.2 is equal to the radius of the circular pin hole 1.1.

[0038] The above is only the preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and its concept of the present invention, making equivalent substitutions or changes should be covered within the protection scope of the present invention.

Claims

1. A connecting pin device for preventing crosstalk and facilitating labor-saving insertion and extraction, comprising a draw roll floor pin seat, a push roll floor pin seat and a connecting pin, characterized in that, The web of the extraction roller floor pin seat is provided with double-aperture pin holes and long slot holes, and the abdomen of the pushing roller floor pin seat is provided with two round pin holes. The connecting pin passes through the double-aperture pin holes and the round pin holes to connect the extraction roller floor pin seat and the pushing roller floor pin seat. A limiting ring groove is provided at one end of the connecting pin, and the limiting ring groove is limited by a connecting pin baffle. The connecting pin baffle is limited by a seat baffle. One side of the seat baffle is provided with a socket inserted into the web of the pushing roller floor pin seat, and the end face abuts against the end face of the web of the extraction roller floor pin seat.

2. The connecting pin device for preventing displacement and facilitating labor-saving insertion and extraction according to claim 1, characterized in that, The connecting pin device further includes a tensioning pin, and the tensioning pin connects the long slot hole of the pushing roller floor pin seat and the round pin hole of the extraction roller floor pin seat.

3. A connecting pin device for preventing displacement and facilitating labor-saving insertion and extraction according to claim 1, characterized in that, One side of the connecting pin baffle is provided with a semicircular pin slot at the bottom of the opening.

4. A pin connection device for preventing displacement and facilitating labor-saving insertion and extraction according to claim 1, characterized in that, A baffle guiding device is provided at the top of the web of the pushing roller floor pin seat.

5. A connecting pin device for preventing displacement and facilitating labor-saving insertion and extraction according to claim 1, characterized in that, The double-aperture pin holes are two round holes with unequal diameters and non-concentricity sleeved side by side, and the length of the center lines of the two round holes is less than the radius of the small-diameter round hole.

6. A connecting pin device for preventing crosstalk and facilitating labor-saving plugging and unplugging according to claim 1 or 5, characterized in that, The diameter of the small hole of the double-aperture pin hole is equal to the diameter of the round pin hole.

7. A connecting pin device for preventing displacement and facilitating labor-saving plugging and unplugging according to claim 1, characterized in that, The radius of the long slot hole is equal to the radius of the round pin hole.

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