Maintenance-free first conveyor device of heading machine

Abstract

The utility model relates to the technical field of heading machines, and discloses a heading machine maintenance-free first conveyor device which comprises a front chute and a rear chute, the upper end of the front chute and the upper end of the rear chute are connected with the same upper connecting plate, at least one pair of connecting holes are symmetrically formed in the center of the upper end of the upper connecting plate, and pin shafts are installed in the connecting holes. The upper end of the upper connecting plate is provided with a pin shaft, the outer side of the pin shaft is connected with an elastic check ring, the lower end hole of the front chute and the lower end hole of the rear chute are connected with a lower connecting plate, the upper end of the upper connecting plate and the upper end of the lower connecting plate are provided with threaded holes in a reserved mode, and threaded connecting pairs are installed in the threaded holes. The assembly precision is improved, the shear-resistant bearing capacity is greatly improved through the design of the high-strength pin shafts, long-term maintenance-free operation is achieved, the working efficiency and the production benefits of equipment are improved, meanwhile, parts are concentrated in the chute connecting inner space, and compared with a traditional flange connecting frame, the installation space is saved.

Description

TECHNICAL FIELD

[0001] The utility model relates to excavator technical field, concretely is a kind of first conveyor device of excavator maintenance-free. BACKGROUND

[0002] Current host manufacturer host chute connection is connected in flange connection frame form, host main body space is limited, it is not convenient to assemble. When host works, whole machine vibration is big, and the frictional force generated by pre-tightening force is connected in conventional threaded pair after long time work, and threaded pair and connected piece are relatively displaced, even shear fracture, and it is difficult to maintain after connecting bolt fracture. Limited underground space, harsh working conditions, difficult to disassemble and repair connection position, stoppage replacement efficiency is low, and economy is poor.

[0003] Therefore, based on the above background, design a kind of excavator maintenance-free chute connecting device to effectively solve the problems that the connecting bolt of current excavator is easily sheared, and it is difficult to disassemble and repair connection, it has important practical significance. INVENTION CONTENTS

[0004] The utility model aims at providing a kind of excavator maintenance-free first conveyor device, solve the following technical problems: current host manufacturer host chute connection is connected in flange connection frame form, host main body space is limited, it is not convenient to assemble. When host works, whole machine vibration is big, and the frictional force generated by pre-tightening force is connected in conventional threaded pair after long time work, and threaded pair and connected piece are relatively displaced, even shear fracture, and it is difficult to maintain after connecting bolt fracture. Limited underground space, harsh working conditions, difficult to disassemble and repair connection position, stoppage replacement efficiency is low, and economy is poor.

[0005] The utility model can be realized by the following technical scheme: a kind of excavator maintenance-free first conveyor device, including front chute and rear chute, the upper end of the front chute and rear chute is connected with same upper connecting plate, the upper end central position of the upper connecting plate is symmetrically provided with at least a pair of connecting holes, the inside of the connecting hole is installed with pin shaft, the pin shaft is fixedly connected to the upper end of front chute or rear chute with upper connecting plate;

[0006] Pin shaft connection mode simplifies assembly process, reduces the cumbersome operation of bolt fastening, and allows the front chute and rear chute to swing within a certain range, adapts to vibration or slight deviation in the conveying process, reduces stress concentration.

[0007] As a further scheme of the utility model: the outside of the pin shaft is connected with elastic check ring, and the elastic check ring is used to limit the axial displacement of the pin shaft in operation;

[0008] The elastic check ring absorbs part of impact load in the working process of the excavator, reduces rigid wear between the pin shaft and the connecting hole, and prolongs the service life.

[0009] As a further scheme of the utility model: the lower end hole of the front chute and the rear chute is connected with a lower connecting plate.

[0010] As a further scheme of the utility model: the upper end of the upper connecting plate and the lower connecting plate is reserved with a threaded hole, a threaded connecting pair is installed in the threaded hole, and the threaded connecting pair is fastened through bolts or screws with the corresponding holes of the front chute and the rear chute respectively.

[0011] The threaded connecting pair provides rigid constraint, prevents unexpected displacement between the connecting plate and the chute, enhances overall stability, meanwhile, avoids loosening caused by vibration, and reduces maintenance requirements.

[0012] As a further scheme of the utility model: the pin shaft adopts high-strength material.

[0013] The high-strength material has better fatigue resistance, is not prone to microcracks under long-term vibration working conditions, reduces maintenance cost, and effectively improves the carrying capacity of the equipment.

[0014] As a further scheme of the utility model: the mounting hole of the front chute and the rear chute is coaxially aligned with the hole of the upper connecting plate or the lower connecting plate in the vertical direction.

[0015] As a further scheme of the utility model: the threaded connecting pairs are uniformly distributed on the connecting surface of the upper connecting plate or the lower connecting plate.

[0016] The utility model has the advantages of:

[0017] (1) the utility model realizes accurate centering between parts through the close cooperation of the pin shaft and the hole, ensures relative position, improves the precision of assembly, reduces assembly time, the connecting device mainly bears load through the shear strength of the pin shaft itself, rather than relying on the friction force generated by the pretightening force of the threaded pair, the pin shaft connection is not prone to loosening in the vibration environment, the problem of fatigue failure of the bolt due to alternating load is avoided, especially suitable for high load scenes (such as heavy machinery or vibration environment), and the carrying capacity is much higher than that of bolt connection, so that the maintenance-free purpose is achieved. This also makes the equipment more stable and reliable when facing heavy load working conditions, reduces equipment failure and damage caused by insufficient carrying capacity, improves the working efficiency and production benefit of the equipment.

[0018] (2) The pin shaft of the utility model is made of high-strength material, which further improves the bearing capacity of the equipment, and the parts are concentrated in the internal space of the front chute and the rear chute, compared with the flange connection frame connection form, the installation space is saved, and the installation process of the equipment is relatively more convenient and fast. When the installation personnel operate in the limited space in the well, there is no need to deal with complex space layout and interference of parts, which reduces the difficulty and risk in the installation process, reduces the installation cost and time cost, and improves the installation accuracy and reliability.

[0019] Additional aspects and advantages of the utility model will be partially given in the following description, some will become apparent from the following description, or will be understood by the practice of the utility model. BRIEF DESCRIPTION OF DRAWINGS

[0020] The utility model will be further described below in combination with the drawings.

[0021] Figure 1 It is the structure schematic diagram of the maintenance-free chute connecting device of the utility model;

[0022] Figure 2 It is the side view structure schematic diagram of the utility model as a whole.

[0023] In the drawing: 1, front chute; 2, upper connecting plate; 3, threaded connection pair; 4, pin shaft; 5, elastic baffle ring; 6, rear chute; 7, lower connecting plate. DETAILED DESCRIPTION

[0024] The embodiments of the utility model will be described in detail below, and the examples of the embodiments are represented in the drawings, wherein the same or similar symbols represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the utility model and cannot be understood as limiting the utility model.

[0025] In the utility model, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature. It can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature can be above or obliquely above the second feature, or it can only mean that the horizontal height of the first feature is higher than that of the second feature. The first feature can be below or obliquely below the second feature, or it can only mean that the horizontal height of the first feature is less than that of the second feature.

[0026] In the technical field of heading machine, the current heading machine main chute connection adopts flange connection frame form connection, the friction force generated by the conventional thread pair through pre-tightening force is connected, which is easy to fail after a long time work, the relative displacement of the thread pair and the connected part is generated, even the shear force is broken, and the maintenance difficulty after the connection bolt is broken has an important influence on the working efficiency and service life of the heading machine, the maintenance-free chute connection device of the heading machine of the utility model aims at the problem that the relative displacement of the conventional thread pair and the connected part is generated, even the shear force is broken, and the maintenance difficulty after the connection bolt is broken, a series of innovative designs are adopted to realize convenient assembly and maintenance-free, and the specific implementation mode is as follows:

[0027] As Figure 1 , Figure 2 , a maintenance-free chute connection device of a heading machine, comprising a front chute 1 and a rear chute 6, the upper end holes of the front chute 1 and the rear chute 6 are connected with the same upper connecting plate 2, two symmetrical connecting holes are accurately processed at the upper end center position of the upper connecting plate 2, and a pin shaft 4 is connected between the upper end center two connecting holes of the upper connecting plate 2 and the front chute 1 and the rear chute 6.

[0028] The upper connecting plate 2 is used as a shared connecting piece of the front chute 1 and the rear chute 6, the alignment accuracy of the two is ensured, and the misalignment deformation is avoided, the pin shaft 4 is connected in a penetrating manner, the front chute 1 and the rear chute 6 form a stable hinged structure, the overall rigidity is improved, the pin shaft 4 connection mode simplifies the assembly process, reduces the cumbersome operation of bolt fastening, and allows the front chute 1 and the rear chute 6 to swing relatively within a certain range, adapts to the vibration or slight deviation in the conveying process, and reduces stress concentration.

[0029] The outer side of the pin shaft 4 is connected with an elastic check ring 5, the elastic check ring 5 effectively limits the axial displacement of the pin shaft 4 in operation, avoids loosening and falling off caused by vibration or load change, simultaneously, the elastic structure can absorb part of the impact load, reduces the rigid wear between the pin shaft 4 and the connecting hole, and prolongs the service life.

[0030] The lower end holes of the front chute 1 and the rear chute 6 are connected with a lower connecting plate 7.

[0031] Thread holes are reserved at the upper ends of the upper connecting plate 2 and the lower connecting plate 7, a threaded connecting pair 3 is installed in the thread holes, and the threaded connecting pair 3 is fastened through bolts or screws in the corresponding hole positions of the front chute 1 and the rear chute 6 respectively.

[0032] The front chute 1 and the rear chute 6 are hinged with the upper connecting plate 2 through the pin shaft 4, the pin shaft 4 is fixed by inserting the elastic check ring 5, the corresponding hole positions of the upper connecting plate 2, the lower connecting plate 7, the front chute 1 and the rear chute 6 are aligned, and the threaded connecting pair 3 is tightened, so that the auxiliary fixing is realized, the threaded connecting pair 3 provides rigid constraint, prevents unexpected displacement between the connecting plate and the chute, enhances the overall stability, simultaneously, avoids loosening caused by vibration, and reduces the maintenance requirement.

[0033] Pin 4 is made of high-strength material, which has better fatigue resistance and is less prone to micro-cracks under long-term vibration conditions, reducing maintenance costs and meeting the "maintenance-free" design goal, effectively improving the load-bearing capacity of the equipment.

[0034] The mounting holes of the front chute 1 and the rear chute 6 are coaxially aligned with the holes of the upper connecting plate 2 and the lower connecting plate 7 in the vertical direction.

[0035] The threaded connection pairs 3 are evenly distributed on the connecting surfaces of the upper connecting plate 2 or the lower connecting plate 7.

[0036] In summary, a maintenance-free first transport device for a tunneling machine achieves precise alignment between parts through the tight fit of pin 4 and the hole. This device primarily relies on the shear strength of pin 4 itself to bear the load, rather than depending on the frictional force generated by the preload of the threaded pair. In a vibrating environment, the pin 4 connection is less prone to loosening, enabling the equipment to operate more stably and reliably under heavy load conditions. This reduces equipment failures and damage caused by insufficient load-bearing capacity, improving equipment efficiency and production benefits, thus achieving the goal of maintenance-free operation. Concentrating the components within the internal space connecting the front chute 1 and the rear chute 6 saves installation space. When installing in the limited underground space, installers do not need to deal with complex spatial layouts and component interference issues, reducing installation costs and time, and improving installation accuracy and reliability.

[0037] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A maintenance-free first transport device for a tunneling machine, characterized in that, It includes a front chute (1) and a rear chute (6). The upper ends of the front chute (1) and the rear chute (6) are connected to the same upper connecting plate (2). At least one pair of connecting holes are symmetrically opened at the center of the upper end of the upper connecting plate (2). A pin (4) is installed inside the connecting hole. The pin (4) fixes the upper connecting plate (2) to the upper end of the front chute (1) or the rear chute (6).

2. The maintenance-free first transport device for a tunneling machine according to claim 1, characterized in that, An elastic retaining ring (5) is connected to the outside of the pin (4), and the elastic retaining ring (5) is used to limit the axial displacement of the pin (4) during operation.

3. The maintenance-free first transport device for a tunneling machine according to claim 1, characterized in that, The lower end holes of the front chute (1) and the rear chute (6) are connected to the lower connecting plate (7).

4. The maintenance-free first transport device for a tunneling machine according to claim 1, characterized in that, The upper end of the upper connecting plate (2) and the lower connecting plate (7) are both reserved with threaded holes. A threaded connecting pair (3) is installed in the threaded hole. The threaded connecting pair (3) is fastened to the corresponding holes of the front chute (1) and the rear chute (6) by bolts or screws.

5. The maintenance-free first transport device for a tunneling machine according to claim 1, characterized in that, The pin (4) is made of high-strength material.

6. The maintenance-free first transport device for a tunneling machine according to claim 1, characterized in that, The mounting holes of the front chute (1) and the rear chute (6) are coaxially aligned with the holes of the upper connecting plate (2) or the lower connecting plate (7) in the vertical direction.

7. The maintenance-free first transport device for a tunneling machine according to claim 4, characterized in that, The threaded connection pairs (3) are evenly distributed on the connection surfaces of the upper connecting plate (2) or the lower connecting plate (7).

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