Shear-proof limiting connection device for end support and transfer machine
By adding female ear plates on both sides of the end support push seat to form a square box structure, and combining it with the male ear plate of the transfer machine chute, a pin shaft transverse limiting connection is achieved, which solves the shear failure problem caused by the height difference between the end support and the transfer machine, and improves the stability of the equipment and the continuity of production.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- LIAONING GENERAL MINING MACHINERY EQUIP MFG
- Filing Date
- 2025-08-22
- Publication Date
- 2026-06-02
AI Technical Summary
In the transportation system of a fully mechanized coal mining face, the connection between the end support and the transfer machine is subject to abnormal shear loads on the bolt pin bearings due to the equipment height difference, leading to frequent shear failures and equipment malfunctions, which affects the continuity of production.
Female ear plates are added to both sides of the end support push seat to form a square box structure, which matches the male ear plate of the transfer machine chute. The connection is made by a pin shaft through the limit, which solves the problem of shear failure, while maintaining the symmetrical layout of the equipment and the hoisting pre-positioning function.
It effectively prevents bolts and pins from failing due to shearing, reduces spare parts costs, improves equipment assembly efficiency, reduces unplanned downtime, and ensures continuous production in the coal mine transportation system.
Smart Images
Figure CN224315311U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the industrial and mining fields, specifically a limiting connection device for preventing shear stress. Background Technology
[0002] In the transportation system of a fully mechanized coal mining face, the end support (such as the ZTZ48000 / 24 / 38 model) and the transfer conveyor (such as the SZZ1000 / 525 model) are typically connected and fixed by two rows of 12 Ø70 bolts and pins. Because the transfer conveyor is installed on the end support's moving base and is quite long, during the equipment's movement, uneven terrain or stress on the working face causes a dynamic height difference between the end support and the transfer conveyor's mounting surface. This height difference subjects the bolt pin bearings to abnormal shear loads, leading to the following problems:
[0003] Bolt shear failure: Frequent impact loads cause bolt pins to loosen or even break. Each failure requires production to stop for repair, affecting the continuity of raw coal transportation. Utility Model Content
[0004] To solve the above problems, this utility model discloses an anti-shear limiting connection device between an end bracket and a transfer machine.
[0005] The specific technical solution is as follows:
[0006] An anti-shear limiting connection device between an end bracket and a transfer machine includes: four sets of female ear plates disposed on both sides of the end bracket push seat, wherein the female ear plates are welded to extend to the underside of the push seat cover plate to form a square box structure;
[0007] The transfer machine chute is U-shaped and placed on the end support push seat. Four male ear plates are set on both sides of the transfer machine chute. The position of the male ear plates corresponds to the female ear plates and avoids the original bolt pin holes.
[0008] The pin is inserted into the corresponding hole of the female ear plate and the male ear plate. The end support push seat cover plate is set below the transfer machine chute. The end support push seat cover plate is provided with a positioning pin. The bottom of the end support push seat is provided with a pin hole corresponding to the positioning pin.
[0009] The pin hole is rounded, and the positioning pin corresponding to the pin hole is also rounded.
[0010] The end support push seat and the female and male lug plates of the transfer machine chute are both left-right symmetrical structures.
[0011] The advantages of this utility model are: This device forms a square box structure by adding female ear plates on both sides of the end support push seat and rooting them downwards, and the female ear plates match the male ear plates of the transfer machine chute. The connection relationship of the pin shaft passing through and limiting is used to fundamentally solve the shear failure problem involved in the relative movement of the original bolt pin shaft due to the equipment height difference; the symmetrical ear plate layout supports seamless interchange of the left and right working surfaces, reducing spare parts costs; at the same time, the hoisting and pre-positioning function of the positioning pin shaft improves assembly efficiency. The overall structure does not require modification of the original equipment interface. Under the premise of ensuring the original functions of the end support and transfer machine, it greatly reduces unplanned downtime and improves the continuous production capacity of the coal mine transportation system. Attached Figure Description
[0012] Figure 1 This is a schematic diagram of the structure of this utility model;
[0013] Figure 2 This is a schematic diagram of the end support sliding seat structure;
[0014] Figure 3 This is a schematic diagram of the transfer machine chute. Detailed Implementation
[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0016] An anti-shear limiting connection device between an end bracket and a transfer machine includes: four sets of female ear plates 2 disposed on both sides of the end bracket push seat 1, wherein the female ear plates 2 are welded to extend to the underside of the push seat cover plate 7 to form a square box structure.
[0017] The transfer machine chute 3 is U-shaped and placed on the end support push seat 1. Four male ear plates 4 are set on both sides of the transfer machine chute 3. The position of the male ear plates 4 corresponds to the female ear plates 2 and avoids the original bolt pin holes.
[0018] The pin 5 is inserted into the corresponding holes of the female ear plate 2 and the male ear plate 4. The end bracket push seat cover plate 8 is provided below the transfer machine chute 3. The end bracket push seat cover plate 8 is provided with a positioning pin 9. The bottom of the end bracket push seat 1 is provided with a pin hole 10 corresponding to the positioning pin 9.
[0019] The pin hole 10 is rounded, and the positioning pin 9 corresponding to the pin hole 10 is also rounded.
[0020] The female ear plate 2 and male ear plate 4 of the end support push seat 1 and the transfer machine chute 3 are both left-right symmetrical structures.
[0021] The working principle of this utility model is as follows: When underground, visibility and operating space are very limited due to the working environment. When hoisting the transfer machine, the positioning pin 9 on the push seat cover plate 8 is inserted into the pin hole 10 of the chute bottom plate first to constrain the displacement of the transfer machine chute and perform pre-positioning. When the lifting device gradually descends, the male ear plate 4 and the female ear plate 2 are aligned with the ear plate holes under the operation of the worker. The ear plate holes of the male ear plate 4 and the female ear plate 2 are inserted laterally through the pin 5 to form rigid limits in the height and horizontal directions, so that the dynamic height difference load between the equipment is transmitted to the square box-type rooting structure of the female ear plate (welded to the bottom of the cover plate) by the pin.
[0022] Finally, tighten the original 12 Ø70 bolts and pins 6 to complete the overall installation.
Claims
1. A shear-prevention and limiting connection device between an end bracket and a transfer machine, characterized in that: Four sets of female ear plates (2) are set on both sides of the end support push seat (1). The female ear plates (2) are welded to the push seat cover plate (7) to form a square box structure. The transfer machine chute (3) is placed on the end support push seat (1) in a U-shape. Four male ear plates (4) are set on both sides of the transfer machine chute (3). The position of the male ear plates (4) corresponds to the female ear plates (2) and avoids the original bolt pin holes. The pins (5) are inserted into the corresponding holes of the female ear plates (2) and the male ear plates (4). The end support push seat cover plate (8) is set below the transfer machine chute (3). The end support push seat cover plate (8) is provided with a positioning pin (9). The bottom of the end support push seat (1) is provided with a pin hole (10) corresponding to the positioning pin (9).
2. The anti-shear limiting connection device between the end bracket and the transfer machine according to claim 1, characterized in that: The pin hole (10) is rounded, and the positioning pin (9) corresponding to the pin hole (10) is also rounded.
3. The anti-shear limiting connection device between the end bracket and the transfer machine according to claim 1, characterized in that: The female ear plate (2) and male ear plate (4) of the end support push seat (1) and the transfer machine chute (3) are both left-right symmetrical structures.