CN-116357649-B - Pin connection middle groove

CN116357649BCN 116357649 BCN116357649 BCN 116357649BCN-116357649-B

Abstract

The invention relates to the technical field of coal mining, in particular to a pin connection middle groove. Comprises a middle groove body, a stop block component and a rail seat component. The middle groove body is connected through the pin instead of the traditional dumbbell, is formed by adopting an integral casting process, improves the connection strength, solves the problem that the underground dumbbell is easy to damage and needs to be replaced frequently, and is beneficial to the smooth proceeding of the coal mining process. The connecting pin of the middle groove is of a spherical structure, when the middle grooves rotate relatively in the vertical and horizontal directions, the connecting parts of the connecting pins can be guaranteed to be in surface contact, and the connecting structure of the whole casting pin is always in a pressurized state, so that the use stability of equipment and the coal mining efficiency can be improved.

Inventors

QIAO ZHILI
YAN ZHICHAO
NIU JIABIN
WU HAO
LIU YANAN
YAN SHIYUAN
ZHAO JU
ZHANG HONGLI
CUI WEIXIU
YU YOU
SUN LU
WANG JINGMEI
WANG ZHENG

Assignees

中煤张家口煤矿机械有限责任公司

Dates

Publication Date: 20260508
Application Date: 20230411

Claims (2)

1. The pin connection middle groove is characterized by comprising a middle groove body (1), a stop block assembly (2) and a rail seat assembly (3), wherein the middle groove body (1) comprises a shovel plate ledge (11), a middle plate (12), a bottom plate (13) and a baffle ledge (14), the shovel plate ledge (11) and the baffle ledge (14) are welded on the left side and the right side of the middle plate (12) and the bottom plate (13) according to the set interval, and the middle plate (12) is welded above the bottom plate (13) according to the set interval; the stop block assembly (2) comprises a stop block (21), a connecting bolt (22) and a gasket (23), wherein the stop block (21) is arranged after the adjacent middle grooves are assembled, and the stop block assembly is fixed to the end of the shovel plate ledge (11) or the baffle plate ledge (14) by the connecting bolt (22) and the gasket (23); The rail seat assembly (3) comprises a base plate (31), a connecting plate (32), a left rail seat (33), a rib plate (34) and a right rail seat (35), wherein the base plate (31) is welded on a baffle ledge (14), and the connecting plate (32), the left rail seat (33), the rib plate (34) and the right rail seat (35) are welded on the base plate (31) according to intervals; The shovel plate ledge (11) and the baffle ledge (14) are of a structure with a pin convex end at one end, a pin with a pin convex end and the ledge are of an integral casting structure, the pin surface is a spherical surface, the other end is of a structure with an L-shaped hole convex end, the hole surface contacted with the pin is also a spherical surface, when the middle trough body (1) is normally connected with the adjacent middle trough body (1) without any direction corner, a certain gap is reserved between the pin and the L-shaped hole, and the upper side and the lower side of the side plate with the pin convex end are required to have a drawing angle to ensure the bending deformation margin in the vertical direction; the surface of the stop block (21) in contact with the pin of the shovel plate ledge (11) or the baffle ledge (14) is also spherical, and the unilateral gap L2 between the connecting bolt hole of the stop block (21) and the connecting bolt (22) is larger than the gap L1 between the stop block and the convex end of the L-shaped hole of the middle groove body so as to prevent the bolt from being subjected to shearing force; When the middle groove is installed, the side of the pin protruding end head is required to pass through the hole site of the stop block installed on the side of the L-shaped hole protruding end head of the adjacent middle groove body upwards, then the stop block is pushed to the right to the working position, and finally the stop block component (2) is installed.
2. A pin connection middle groove is characterized in that when the middle groove is normally connected without any direction rotation angle and stress in all directions, a gap L3 between a pin and a stop block (21), a horizontal gap L4 between the pin and the L-shaped hole, L3 and L4 are gaps corresponding to the maximum rotation angle of the middle groove designed to be horizontally inwards or outwards, the gap is the product of the tangent value of the width W of the outer groove of the middle groove and the maximum rotation angle designed to be horizontally inwards or outwards of the middle groove, the maximum rotation angle of the horizontal direction between adjacent middle groove bodies is ensured by designing the value of L3 and L4, the maximum rotation angle of the middle groove pin and the upper gap G1 of the L-shaped hole, the maximum rotation angle of the middle groove pin and the maximum rotation angle G2 of the L-shaped hole are ensured by designing the value of G1 and G2, and the included angles alpha 2 of the upper side of the convex end of the middle groove are larger than the maximum rotation angle alpha 1 of the middle groove designed to be horizontally inwards or outwards, and the included angles beta 1 of the inner side of the convex end of the middle groove are designed to be larger than the maximum rotation angle beta 1 of the middle groove designed to be horizontally and the inner side of the convex end of the middle groove is designed to be horizontally stretched out of the middle groove and the middle groove is designed to be stressed by designing the value of the upper and lower angle beta 2 of the middle groove to be larger than the maximum rotation angle beta and delta between the inner side and delta is designed to be stressed; When the connecting position of the middle groove is acted by pressure parallel to the horizontal direction, the end face of the notch of the whole middle groove is attached, so that larger acting force can be born, and the strength design is not considered; The tensile force action of the connecting position of the middle groove parallel to the horizontal direction only acts between the connecting pin of the middle groove and the stop block (21) and between the stop block (21) and the inner wall of the L-shaped hole extending out of the convex end, and the contact strength of the stop block (21) needs to be lower than that of the inner wall of the L-shaped hole of the convex end head of the middle groove body (1) and that of the pin so as to prevent the two side ends of the shovel plate groove side (11) or the baffle plate groove side (14) of the middle groove body (1) from being damaged when the tensile force is overlarge; When the middle groove is connected, one end of the connecting part of the middle groove is pulled to act and the other end is stressed by compression, one end of the pulling acting force is stressed by compression, a pin of the middle groove body (1) and the stop block (21) are in a joint extrusion state, the stop block (21) and the hole surface of the adjacent middle groove body (1) are in a joint extrusion state, a gap is reserved between the pin and an L-shaped hole when the middle groove is connected, the gap between a connecting bolt hole of the stop block (21) and a connecting bolt (22) is larger than the gap corresponding to the design horizontal or vertical rotation angle of the middle groove, the connecting bolt (22) is not stressed by the shearing force of the stop block (21), one end of the pulling acting force is stressed, the stop block (21) is in a state not stressed by the shearing force, the pin of the middle groove and the L-shaped hole are in a joint extrusion state, the convex end side of the pin is stressed at the root of the groove wall of the middle groove body (1) no matter under tension or compression, When the middle groove rotates in the vertical direction during connection, the middle groove pin and the L-shaped hole are in a fit extrusion state, and the upper and lower sides of the side plates with the pin protruding ends which are singly extended are provided with draft angles to ensure the bending deformation margin in the vertical direction, and the sides of the groove walls of the middle groove body (1) with the pin protruding ends which are singly extended are subjected to root stress to ensure the strength of the protruding ends.

Description

Pin connection middle groove Technical Field The invention relates to the technical field of coal mining, in particular to a pin connection middle groove. Background The pin connection structure can avoid the occurrence of the tensile fracture condition of the traditional dumbbell connected with the middle groove in the use process, and is beneficial to the smooth proceeding of the coal mining process. The middle groove connecting pin is of a spherical structure, so that when the middle groove rotates vertically or horizontally, the connecting part of the middle groove can still be ensured to be in surface contact, the pin connecting structure is always in a compressed state, and the equipment use stability and the coal mining efficiency can be improved. Meanwhile, the invention fills the blank at home and abroad and has important significance for the development of the high-efficiency intelligent fully mechanized mining equipment. Disclosure of Invention The invention aims to design a pin connection middle groove, improve connection strength and solve the problem that a tension fracture dumbbell needs to be frequently replaced. The technical scheme of the invention is that the pin connection middle groove is characterized by comprising a middle groove body, a stop block component and a rail seat component; The middle groove body comprises a shovel plate groove side, a middle plate, a bottom plate and a baffle groove side, wherein the shovel plate groove side and the baffle groove side are welded on the left side and the right side of the middle plate and the left side of the bottom plate according to set intervals, and the middle plate is welded above the bottom plate according to set intervals. The stop block assembly comprises a stop block, a connecting bolt and a gasket, wherein the stop block is assembled after the adjacent middle grooves are assembled, and the stop block is fixed to the end of the shovel plate ledge or the baffle plate ledge by the connecting bolt and the gasket. The rail seat assembly comprises a base plate, a connecting plate, a left rail seat, a rib plate and a right rail seat, wherein the base plate is welded on the groove side of the baffle plate, and the connecting plate, the left rail seat, the rib plate and the right rail seat are welded on the base plate according to intervals. The shovel plate ledge and the baffle ledge are of a structure with a pin protruding end at one end, the pin and the ledge are integrally cast, the pin face is spherical, the other end is of a structure with an L-shaped hole protruding end, the hole face contacted with the pin is also spherical, when the middle tank body is normally connected with the adjacent middle tank body without any direction corner, a certain gap is reserved between the pin and the L-shaped hole, and a drawing angle is required to be arranged on the upper side plate and the lower side plate of the pin protruding end to ensure the bending deformation margin in the vertical direction. The contact surfaces of the two sides of the pin convex end and the inner side of the hole convex end are provided with draft angles to ensure the bending deformation margin in the horizontal direction; The surface of the stop block, which is contacted with the ledge of the shovel plate or the ledge pin of the baffle plate, is also a spherical surface, and the unilateral gap L2 between the connecting bolt hole of the stop block and the connecting bolt is larger than the gap L1 between the stop block and the convex end of the L-shaped hole of the middle groove body so as to prevent the bolt from being sheared. When the middle groove is installed, the side of the pin protruding end head is required to pass through the hole site of the stop block installed on the side of the L-shaped hole protruding end head of the adjacent middle groove body upwards, then the stop block is pushed to the right to the working position, and finally the stop block component is installed. The middle groove is normally connected without any direction corner and a gap L3 between a pin and a stop block, the middle groove pin and the L-shaped hole are horizontally provided with a gap L4 corresponding to the maximum corner of the middle groove, L3 and L4 are the products of the tangent value of the width W of the outer groove of the middle groove and the maximum corner of the middle groove, the maximum corner of the horizontal direction between adjacent middle groove bodies is guaranteed through the design of the values of L3 and L4, the gap G1 between the middle groove pin and the upper gap G1 of the L-shaped hole and the gap G2 between the middle groove pin and the lower gap G1 of the L-shaped hole are the gaps corresponding to the maximum corner of the middle groove, the gaps are the products of the upper contact point H1 (or the lower contact point H2) of the upper edge to the L-shaped hole and the maximum corner of the middle groove, the maximum corner of the vertical direc