Pin coupling mid slot

Abstract

The present application relates to the technical field of coal mining, and particularly relates to a pin connection middle trough. The pin connection middle trough comprises a middle trough body, a stop block assembly and a rail seat assembly. The middle trough body is connected by a pin instead of a traditional dumbbell connection, and is formed by an integral casting process, thereby improving the connection strength and solving the problem of frequent replacement of the underground dumbbell which is prone to damage, and facilitating the smooth progress of the coal mining process. The pin connection of the middle trough is in a spherical structure, and when the middle troughs rotate in the vertical and horizontal directions, the pin connection part can be guaranteed to be in surface contact, and the integral casting pin connection structure is always in a pressure state, thereby improving the stability of the equipment and the efficiency of coal mining.

Description

Technical Field

[0001] This invention relates to the field of coal mining technology, and in particular to a pin-connected central groove. Background Technology

[0002] By employing a pin-connection structure, the tensile breakage that frequently occurs with traditional center-slot connections (like dumbbells) during use can be avoided, thus facilitating the smooth operation of the coal mining process. The spherical pin structure of this center-slot connection ensures surface contact at the connection point even when the center slots rotate vertically or horizontally relative to each other. Furthermore, the pin-connection structure is always under compression, improving equipment stability and coal mining efficiency. This invention also fills a gap in domestic and international technology and is of great significance for the future development of high-efficiency, intelligent fully mechanized mining equipment. Summary of the Invention

[0003] The purpose of this invention is to design a central groove for a pin connection, which improves the connection strength and solves the problem of needing to frequently replace dumbbells that break during tension.

[0004] The technical solution of the present invention is: a pin connection center groove, characterized in that the center groove includes: a center groove body, a stop block assembly, and a rail seat assembly;

[0005] The central trough includes: a shovel plate groove, a middle plate, a bottom plate, and a baffle plate groove. The shovel plate groove and the baffle plate groove are welded to the left and right sides of the middle plate and the bottom plate at a set interval, and the middle plate is welded to the top of the bottom plate at a set interval.

[0006] The stop block assembly includes: a stop block, a connecting bolt, and a washer. After the adjacent middle slots are assembled, the stop block is installed and fixed to the end of the shovel slot or the baffle slot with the connecting bolt and the washer.

[0007] The rail seat assembly includes: a pad, a connecting plate, a left rail seat, a stiffening plate, and a right rail seat. The pad is welded to the baffle groove, and the connecting plate, the left rail seat, the stiffening plate, and the right rail seat are all welded to the pad at intervals.

[0008] Both the shovel plate groove and the baffle groove have a pin-shaped protruding end structure at one end, with the pin and groove being integrally cast and having a spherical surface. The other end has an "L"-shaped hole protruding end structure, with the hole surface in contact with the pin also being spherical. When the middle groove is normally connected to the adjacent middle groove without any directional rotation, there is a certain gap between the pin and the "L"-shaped hole. The side plate with the pin protruding end is required to have draft angles at both the top and bottom to ensure vertical bending deformation margin. The contact surfaces on both sides of the pin protruding end and the inner side of the hole protruding end also have draft angles to ensure horizontal bending deformation margin.

[0009] The surface of the stop block that contacts the shovel groove or the pin of the shovel groove is also spherical. The gap L2 between the connecting bolt hole of the stop block and the connecting bolt on one side should be greater than the gap L1 between the stop block and the "L"-shaped hole protrusion of the middle groove body to prevent the bolt from being subjected to shear force.

[0010] When installing the central groove, the pin protruding end needs to pass upward through the hole of the L”-shaped hole protruding end of the adjacent central groove body, and then push to the right to the working position, and finally install the stop block assembly.

[0011] When the central groove is normally connected without any directional rotation or force in any direction, the gap L3 between the pin and the stop block; the horizontal gap L4 between the central groove pin and the "L"-shaped hole. L3 and L4 are the gaps corresponding to the maximum horizontal inward or outward rotation angle designed for the central groove. This gap is the product of the outer groove width W of the central groove and the tangent of the maximum horizontal inward or outward rotation angle designed for the central groove. The maximum horizontal rotation angle between adjacent central groove bodies is ensured by designing the values ​​of L3 and L4; the gap G1 between the central groove pin and the upper part of the "L"-shaped hole, and the gap G2 between the central groove pin and the lower part of the "L"-shaped hole. G1 and G2 are the gaps corresponding to the maximum vertical upward or downward rotation angle designed for the central groove. This gap is from the upper edge of the central groove to the "L"-shaped hole. The product of the contact point H1 on the hole (or the contact point H2 on the lower edge of the "L"-shaped hole) and the tangent of the maximum vertical upward or downward rotation angle designed for the central groove is used to ensure the maximum vertical rotation angle between adjacent central grooves by designing the values ​​of G1 and G2. During normal connection, the included angle α1 on the upper side of the central groove protrusion and the included angle α2 on the lower side of the central groove protrusion, α1 and α2 must both be greater than the maximum vertical rotation angle designed for the central groove; the included angle β1 on the inner side of the central groove protrusion, the included angle β2 on the outer side of the central groove protrusion, and the included angle δ on the inner side of the central groove, β1, β2, and δ must all be greater than the maximum horizontal rotation angle designed for the central groove to prevent the protruding head from being stressed and to allow the root to bear the stress, thereby improving the connection strength between the central grooves.

[0012] When the connection position of the middle groove is subjected to pressure in a direction parallel to the horizontal, the entire end face of the middle groove opening fits together and can withstand a large force, so this aspect of strength design is not considered.

[0013] When the middle groove connection position is parallel to the horizontal direction and subjected to tensile force, only the middle groove connection pin and the stop block, and the stop block and the inner wall of the "L"-shaped hole of the protruding end bear the force. The contact strength of the stop block needs to be lower than the contact strength of the inner wall of the "L"-shaped hole of the protruding end of the middle groove and the pin, so as to prevent damage to the two ends of the shovel plate groove or the baffle groove of the middle groove when the tensile force is too large.

[0014] When the central groove connection rotates horizontally, one end of the connection is subjected to tensile force, and the other end to compressive force. At the end subjected to tensile force, the stop block is subjected to compressive force. In this state, the central groove pin and the stop block are in close contact and compression, as is the stop block and the adjacent central groove hole surface. During the central groove connection, there is a gap between the pin and the "L"-shaped hole. Because the gap between the stop block's connecting bolt hole and the connecting bolt is larger than the gap corresponding to the designed horizontal or vertical rotation angle of the central groove, the connecting bolt is not subjected to shear force from the stop block. At the end subjected to compressive force, the stop block is not under any force, and the central groove pin and the "L"-shaped hole are in close contact and compression. Regardless of whether it is under tension or compression, the pin-protruding end of the central groove side is stressed at its root, ensuring the strength of the pin-protruding end.

[0015] When the central groove connection rotates vertically, the central groove pin and the "L"-shaped hole are in a close-fitting and compressed state. The single-extended pin protrusion end side plate has draft angles at both the top and bottom to ensure the vertical bending deformation margin. The single-extended pin protrusion end side of the central groove body is stressed at the root to ensure the strength of the protruding protrusion end.

[0016] The beneficial effects of this invention are: by using the central groove, the problem of needing to frequently replace the broken dumbbells during use is avoided, thereby reducing the labor intensity of workers and improving the efficiency of coal mining.

[0017] The technical solution of the present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0018] Figure 1 Right view of the central groove of the present invention

[0019] Figure 2 This is a top view of the central groove of the present invention.

[0020] Figure 3 This is a partial front view of the central tank and adjacent central tanks in normal working condition according to the present invention.

[0021] Figure 4 This is a partial sectional view of the connection structure between the side plates of two adjacent middle troughs of the present invention.

[0022] Figure 5 This is a front view of the pin-shaped protruding end structure of the middle groove of the present invention.

[0023] Figure 6 This is a front view of the L-shaped hole protrusion end of the middle groove of the present invention.

[0024] Figure 7 This is the front view of the block of the present invention.

[0025] Figure 8This is a front view of the installation process of the middle tank and adjacent middle tanks of the present invention.

[0026] Figure 9 This is a top view of the installation process of the middle tank and the adjacent middle tank of the present invention.

[0027] Figure 10 This is a front view of the central groove of the present invention.

[0028] The components are: 1. Central trough, 2. Stop block, 3. Connecting bolt, 4. Washer, 11. Shovel plate sidewall, 12. Middle plate, 13. Bottom plate, 14. Baffle plate sidewall, 21. Stop block, 22. Connecting bolt, 23. Washer, 31. Pad plate, 32. Connecting plate, 33. Left rail seat, 34. Rib plate, 35. Right rail seat.

[0029] G1—Gap between the central groove pin and the "L"-shaped hole (mm)

[0030] G2—Gap between the central groove pin and the lower part of the "L"-shaped hole (mm)

[0031] L1—Gap between the stop block and the "L"-shaped hole protrusion of the central groove (mm)

[0032] L2—Single-sided gap between the stop block and the connecting bolt (mm)

[0033] L3—Clearance between the central groove pin and the stop block (mm)

[0034] L4—Horizontal clearance between the central groove pin and the "L" shaped hole (mm)

[0035] H1—The point of contact between the upper edge of the central groove and the "L"-shaped hole (mm)

[0036] H2—From the lower edge of the central groove to the contact point below the "L"-shaped hole (mm)

[0037] W—Width of the outer groove of the central section (mm)

[0038] α1—Angle on the upper side of the convex end of the middle groove

[0039] α2—Angle on the lower side of the convex end of the central groove

[0040] β1—Angle between the inner side of the convex end of the central groove

[0041] β2—Angle on the outer side of the convex end of the central groove

[0042] δ—Angle inside the middle groove. Detailed Implementation

[0043] This invention provides a central groove for a pin connection, such as... Figures 1-10As shown, the central groove is connected to the adjacent central groove by a pin and limited by a stop block. It includes: a central groove 1 with a pin-shaped protruding end and an "L"-shaped hole protruding end structure at the other end; a stop block assembly 2; and a rail base assembly 3. When installing the central groove 1 to the adjacent central groove 1, the side with the pin-shaped protruding end needs to pass upwards through the hole where the stop block is installed on the side of the adjacent central groove with the hole protruding end, then push it to the right to the working position, and finally install the stop block and bolt. L2 must be greater than L1 to prevent the bolt from being subjected to shear force. The maximum vertical rotation angle between adjacent middle grooves is ensured by designing the values ​​of G1 and G2. The maximum horizontal rotation angle between adjacent middle grooves is ensured by designing the values ​​of L3 and L4. α1 and α2 must both be greater than the maximum vertical rotation angle designed for the middle groove, and β1, β2, and δ must all be greater than the maximum horizontal rotation angle designed for the middle groove to prevent the protruding head from being subjected to force, so that the root bears the force, thereby improving the connection strength between the middle grooves. The contact strength of the stop block 2 needs to be lower than the contact strength of the inner wall of the "L"-shaped hole at the protruding end of the middle groove 1 and the pin, in order to prevent damage to the end of the middle groove when the tensile force is too large.

[0044] Obviously, the detailed description of the technical solutions of the present invention above with reference to the embodiments is illustrative, and other, non-limiting, variations can be designed based on the above description. Those skilled in the art can modify the technical solutions described in the embodiments or make equivalent substitutions for some of the technical features based on the above specification, and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention. All obvious variations or modifications derived from the technical solutions of the present invention are still within the protection scope of the present invention.

Claims

1. A central groove for a pin connection, characterized in that: The central groove includes: a central groove body (1), a stop block assembly (2), and a rail seat assembly (3); the central groove body (1) includes: a shovel plate groove side (11), a middle plate (12), a bottom plate (13), and a stop plate groove side (14). The shovel plate groove side (11) and the stop plate groove side (14) are welded to the left and right sides of the middle plate (12) and the bottom plate (13) at a set interval, and the middle plate (12) is welded to the top of the bottom plate (13) at a set interval. The stop block assembly (2) includes: a stop block (21), a connecting bolt (22), and a washer (23). When the adjacent middle grooves are assembled, the stop block (21) is installed and fixed to the end of the shovel plate groove (11) or the baffle plate groove (14) with the connecting bolt (22) and the washer (23). The rail seat assembly (3) includes: a pad (31), a connecting plate (32), a left rail seat (33), a stiffening plate (34), and a right rail seat (35). The pad (31) is welded to the baffle groove (14), and the connecting plate (32), the left rail seat (33), the stiffening plate (34), and the right rail seat (35) are all welded to the pad (31) at intervals. The shovel plate groove (11) and the baffle groove (14) both have a pin-shaped protruding end structure at one end. The pin with the protruding end is integrally cast with the groove, and the pin surface is spherical. The other end has an "L"-shaped hole protruding end structure, and the hole surface in contact with the pin is also spherical. When the middle groove (1) is normally connected to the adjacent middle groove (1) without any directional angle, there is a certain gap between the pin and the "L"-shaped hole. It is required that the upper and lower sides of the pin-shaped protruding end side plate have draft angles to ensure the bending deformation margin in the vertical direction. The contact surfaces on both sides of the pin-shaped protruding end and the inner side of the hole protruding end have draft angles to ensure the bending deformation margin in the horizontal direction. The surface of the stop block (21) that contacts the pin of the shovel groove (11) or the baffle groove (14) is also spherical. The single-sided gap L2 between the connecting bolt hole of the stop block (21) and the connecting bolt (22) should be greater than the gap L1 between the stop block and the "L"-shaped hole protrusion of the middle groove body to prevent the bolt from being subjected to shear force. When installing the middle groove, the pin protruding end needs to pass upward through the hole of the L”-shaped hole protruding end of the adjacent middle groove body, and then push to the right to the working position, and finally install the stop block assembly (2).

2. A pin connection center groove according to claim 1, characterized in that: When the central groove is normally connected without any directional rotation or force in any direction, the gap between the pin and the stop (21) is L3, and the horizontal gap between the central groove pin and the "L"-shaped hole is L4. L3 and L4 are the gaps corresponding to the maximum horizontal inward or outward rotation angle designed for the central groove. This gap is the product of the outer groove width W of the central groove and the tangent of the maximum horizontal inward or outward rotation angle designed for the central groove. The maximum horizontal rotation angle between adjacent central groove bodies is ensured by designing the values ​​of L3 and L4; the gap between the central groove pin and the "L"-shaped hole is G1, and the gap between the central groove pin and the "L"-shaped hole is G1. The lower gap G2 is designed to ensure the maximum vertical rotation angle between adjacent middle slots by adjusting the values ​​of G1 and G2. During normal connection, the included angle α1 on the upper side of the convex end of the middle slot and the included angle α2 on the lower side of the convex end of the middle slot, both α1 and α2 must be greater than the maximum vertical rotation angle designed for the middle slot. The included angle β1 on the inner side of the convex end of the middle slot, the included angle β2 on the outer side of the convex end of the middle slot, and the included angle δ on the inner side of the middle slot, β1, β2, and δ must all be greater than the maximum horizontal rotation angle designed for the middle slot, to prevent the head of the protruding convex end from being subjected to force, and to allow the root to bear the force, thereby improving the connection strength between the middle slots. When the central groove connection position is subjected to pressure in a direction parallel to the horizontal, the entire central groove opening end face fits together and can withstand a large force; therefore, this aspect of strength design is not considered. When the middle groove connection position is parallel to the horizontal direction and subjected to tensile force, only the middle groove connection pin and the stop (21) and the stop (21) and the inner wall of the "L" shaped hole of the protruding end bear the force. The contact strength of the stop (21) needs to be lower than the contact strength of the inner wall of the "L" shaped hole of the protruding end of the middle groove (1) and the pin, so as to prevent damage to the two ends of the shovel groove (11) or the baffle groove (14) of the middle groove (1) when the tensile force is too large. When the central groove is connected and rotates horizontally, one end of the central groove connection is subjected to tensile force, and the other end is subjected to compressive force. At the end subjected to tensile force, the stop block (21) is subjected to compressive force. At this time, the pin of the central groove (1) and the stop block (21) are in a close-fitting and pressing state, and the stop block (21) and the adjacent central groove (1) hole surface are in a close-fitting and pressing state. When the central groove is connected, there is a gap between the pin and the "L"-shaped hole. Since the gap between the connecting bolt hole of the stop block (21) and the connecting bolt (22) is greater than the gap corresponding to the horizontal or vertical rotation angle of the central groove, the connecting bolt (22) will not be subjected to the shear force of the stop block (21). At the end subjected to compressive force, the stop block (21) is not subjected to force, and the central groove pin and the "L"-shaped hole are in a close-fitting and pressing state. Regardless of whether it is under tension or compression, the pin-protruding end of the central groove (1) is subjected to force at the root, ensuring the strength of the pin-protruding end. When the central groove is connected and rotates vertically, the central groove pin and the "L"-shaped hole are in a state of close compression; the single-extended pin protrusion head side plate has draft angles at the top and bottom to ensure the bending deformation margin in the vertical direction. The central groove body (1) groove side plate with single-extended pin protrusion head side is subjected to root force to ensure the strength of the extended protrusion.

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