Coal mine reversed loader and material receiving system thereof

Abstract

The utility model belongs to the technical field of devices for removing or transporting excavated materials or gangues, and particularly provides a reversed loader for a coal mine and a material receiving system of the reversed loader. The material collecting system comprises a rack, a feeding port and a conveying mechanism are arranged on the rack, a coarse crushing mechanism and a fine crushing mechanism which are arranged in the feeding direction of the conveying mechanism are arranged on the rack, and the crushing particle size of the coarse crushing mechanism is larger than that of the fine crushing mechanism. The reversed loader for the coal mine comprises the material receiving system. The coarse crushing mechanism can pre-crush large coal briquettes and gangues, small coal briquettes and gangues can normally pass through the coarse crushing mechanism in the pre-crushing process, and the fine crushing mechanism only needs to crush the coal briquettes and gangues which are crushed or directly pass through the coarse crushing mechanism. The coarse crushing mechanism and the fine crushing mechanism do not need high configuration, and the overall crushing efficiency is also improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of devices for clearing or transporting excavated materials or gangue, in particular to a transfer machine for coal mines and a material receiving system thereof. Background Art

[0002] In coal mine tunnel mining projects, a complete set of fast excavation systems has been widely promoted. The fast excavation system includes anchor diggers, transfer machines, belt conveyors, self-moving tails, etc., which can realize automatic mechanized operations of coal cutting, coal loading, support, crushing, and transportation.

[0003] The transfer machine generally includes a self-moving chassis, a material collection system, a transfer system, and an anchor support system, etc. It is an auxiliary equipment for the anchor miner. It is mainly used to receive the gangue and coal blocks cut and excavated by the anchor miner and transfer them to the belt conveyor at the rear. During the tunnel excavation process, there are large pieces of coal and gangue falling off from the tunnel wall, but the belt conveyor is difficult to transport large pieces of coal and gangue, so they need to be mechanized and crushed.

[0004] The applicant's Chinese utility model patent with authorization announcement number CN215595618U provides a transfer machine for coal mines. The material receiving system of the transfer machine includes a frame, and the frame is provided with a feed port (a port with a hopper) and a crushing part. The crushing part is provided with a crushing mechanism. The hopper and the crushing part are connected, and a conveying mechanism is also provided between the hopper and the crushing part. Coal blocks and gangue enter from the hopper and are conveyed backwards through the conveying mechanism. The crushing mechanism crushes the coal blocks and gangue to a material size that can be normally conveyed by the belt conveyor.

[0005] However, in actual application, some coal blocks or gangue are too large to be directly crushed into material blocks that can be normally transported by belt conveyors. A high-power crushing mechanism is required, which increases the cost. In addition, during the crushing process, large coal blocks or gangue will block the normal passage of small coal blocks and gangue, and the overall crushing efficiency is also low. Utility Model Content

[0006] The purpose of the utility model is to provide a material receiving system for a coal mine transfer machine to solve the technical problems that a transfer machine using only one-stage crushing in the prior art needs to be equipped with a high-power crushing mechanism and has low crushing efficiency. The purpose of the utility model is also to provide a coal mine transfer machine to solve the same technical problem.

[0007] In order to achieve the above-mentioned purpose, the technical solution of the material receiving system of the coal mine transfer machine provided by the utility model is:

[0008] A material receiving system of a transfer machine for coal mines comprises a frame, a material feed port and a conveying mechanism are arranged on the frame, a coarse crushing mechanism and a fine crushing mechanism are arranged on the frame along the feeding direction of the conveying mechanism, the coarse crushing mechanism is located upstream of the fine crushing mechanism, and the crushing particle size of the coarse crushing mechanism is larger than the crushing particle size of the fine crushing mechanism.

[0009] As a further improvement, a coarse crushing mechanism is arranged at the feed inlet.

[0010] As a further improvement, the coarse crushing mechanism includes at least two coarse crushing rollers or coarse crushing drums arranged along the feeding direction and rotatably mounted on the frame, the outer periphery of the coarse crushing rollers or coarse crushing drums is provided with coarse crushing cutters, and the rotation directions of two adjacent coarse crushing rollers or coarse crushing drums are opposite.

[0011] As a further improvement, the coarse crushing tool comprises a coarse cutting tooth disk sleeved on the outer periphery of the coarse crushing roller or the coarse crushing drum, and a plurality of coarse crushing cutting teeth are arranged on the outer periphery of the coarse cutting tooth disk.

[0012] As a further improvement, the extending direction of the coarse crushing pick is parallel to the tangential direction of the coarse crushing roller or the coarse crushing drum.

[0013] As a further improvement, a hopper is provided at the feed inlet, a portion of the coarse crushing mechanism is higher than the frame, and the hopper is provided with an escape opening for avoiding the coarse crushing mechanism.

[0014] As a further improvement, the fine crushing mechanism comprises a fine crushing roller or a fine crushing drum rotatably mounted on a frame, and fine crushing cutters are arranged on the periphery of the fine crushing roller or the fine crushing drum.

[0015] As a further improvement, the fine crushing tool comprises a fine cutting tooth disk sleeved on the outer periphery of the fine crushing roller or the fine crushing drum, and a plurality of fine crushing cutting teeth are arranged on the outer periphery of the fine cutting tooth disk.

[0016] As a further improvement, the extending direction of the fine crushing pick is parallel to the tangential direction of the fine crushing roller or the fine crushing drum.

[0017] The beneficial effects of the utility model are as follows: the utility model belongs to an improved invention. During operation, the coal blocks and gangue from the front equipment can enter through the feed port and be transported backwards through the conveying mechanism. During the transportation process, the coarse crushing mechanism can pre-crush the large coal blocks and gangue into coarser coal blocks and gangue, and then the coarser coal blocks and gangue continue to be transported backwards through the conveying mechanism, and the fine crushing mechanism continues to crush the coal blocks and gangue to the size that the belt conveyor can normally transport. In the utility model, the coarse crushing mechanism pre-crushes the larger coal blocks and gangue, and the power configured can meet the pre-crushing requirements, and it does not take too long. The crushing particle size of the coarse crushing mechanism is large, and it does not affect the transportation of smaller coal blocks and gangue. The fine crushing mechanism crushes the coal blocks and gangue that have been pre-crushed, and the efficiency is high, and it does not require a higher configuration. Therefore, compared with the prior art, the utility model improves the efficiency of crushing and transportation.

[0018] In order to achieve the above-mentioned purpose, the technical solution of the coal mine transfer machine provided by the utility model is:

[0019] A transfer machine for coal mines comprises a material receiving system and a conveying system. The material receiving system comprises a frame on which a coarse crushing mechanism and a fine crushing mechanism arranged along the feeding direction of the conveying mechanism are arranged. The coarse crushing mechanism is located upstream of the fine crushing mechanism, and the crushing particle size of the coarse crushing mechanism is larger than the crushing particle size of the fine crushing mechanism.

[0020] As a further improvement, a coarse crushing mechanism is arranged at the feed inlet.

[0021] As a further improvement, the coarse crushing mechanism includes at least two coarse crushing rollers or coarse crushing drums arranged along the feeding direction and rotatably mounted on the frame, the outer periphery of the coarse crushing rollers or coarse crushing drums is provided with coarse crushing cutters, and the rotation directions of two adjacent coarse crushing rollers or coarse crushing drums are opposite.

[0022] As a further improvement, the coarse crushing tool comprises a coarse cutting tooth disk sleeved on the outer periphery of the coarse crushing roller or the coarse crushing drum, and a plurality of coarse crushing cutting teeth are arranged on the outer periphery of the coarse cutting tooth disk.

[0023] As a further improvement, the extending direction of the coarse crushing pick is parallel to the tangential direction of the coarse crushing roller or the coarse crushing drum.

[0024] As a further improvement, a hopper is provided at the feed inlet, a portion of the coarse crushing mechanism is higher than the frame, and the hopper is provided with an escape opening for avoiding the coarse crushing mechanism.

[0025] As a further improvement, the fine crushing mechanism comprises a fine crushing roller or a fine crushing drum rotatably mounted on a frame, and fine crushing cutters are arranged on the periphery of the fine crushing roller or the fine crushing drum.

[0026] As a further improvement, the fine crushing tool comprises a fine cutting tooth disk sleeved on the outer periphery of the fine crushing roller or the fine crushing drum, and a plurality of fine crushing cutting teeth are arranged on the outer periphery of the fine cutting tooth disk.

[0027] As a further improvement, the extending direction of the fine crushing pick is parallel to the tangential direction of the fine crushing roller or the fine crushing drum.

[0028] The beneficial effects of the utility model are as follows: the utility model belongs to an improved invention. During operation, the coal blocks and gangue from the front equipment can enter through the feed port and be transported backwards through the conveying mechanism. During the transportation process, the coarse crushing mechanism can pre-crush the large coal blocks and gangue into coarser coal blocks and gangue, and then the coarser coal blocks and gangue continue to be transported backwards through the conveying mechanism, and the fine crushing mechanism continues to crush the coal blocks and gangue to the size that the belt conveyor can normally transport. In the utility model, the coarse crushing mechanism pre-crushes the larger coal blocks and gangue, and the power configured can meet the pre-crushing requirements, and it does not take too long. The crushing particle size of the coarse crushing mechanism is large, and it does not affect the transportation of smaller coal blocks and gangue. The fine crushing mechanism crushes the coal blocks and gangue that have been pre-crushed, and the efficiency is high, and it does not require a higher configuration. Therefore, compared with the prior art, the utility model improves the efficiency of crushing and transportation. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a schematic diagram of the structure of an embodiment of a transfer machine for coal mines in the utility model;

[0030] Figure 2 for Figure 1 Structural diagram of the intermediate material receiving system;

[0031] Figure 3 for Figure 2 Schematic diagram of the structure of the middle and rear crushing drum;

[0032] Figure 4 for Figure 2 Schematic diagram of the structure of the middle front crushing drum;

[0033] Figure 5 for Figure 2 Schematic diagram of the structure of medium and fine crushing.

[0034] Description of reference numerals:

[0035] 1. Material collecting system; 2. Chassis; 3. Anchor support system; 4. Conveying system; 11. Coarse crushing mechanism; 12. Fine crushing mechanism; 13. Frame; 111. Rear crushing drum; 112. Front crushing drum; 113. First drive motor; 114. First reducer; 115. Cutting teeth; 116. First bearing seat; 117. Cutting teeth plate; 1111. Rear drum; 1121. Front drum; 121. Second drive motor; 122. Reducer mounting seat; 123. Second reducer; 124. Fine crushing drum; 125. Second bearing seat; 131. Feed inlet; 132. Conveying channel; 141. Hopper plate; 142. Avoidance. DETAILED DESCRIPTION

[0036] The belt conveyor in the complete set of fast excavation equipment has certain requirements on the size of the coal and gangue to be transported. However, during the cutting and excavation process of the anchor miner, there are large pieces of coal and gangue falling from the tunnel wall. Therefore, it is particularly important to set a crushing mechanism on the transfer machine to crush the large pieces of coal and gangue for the subsequent belt conveyor to successfully transport them. In the prior art, a crushing mechanism is generally set on the material receiving system of the transfer machine, but the crushing mechanism has only one level, which puts forward higher requirements on the crushing capacity (power, crushed particle size) of the crushing mechanism, and the crushing efficiency is also low during actual use.

[0037] In order to solve the above problems, the basic technical concept of the utility model is to add a coarse crushing mechanism for pretreatment, and the larger pieces of coal and gangue are crushed by the coarse crushing mechanism and then continue to be transported backward. The crushing particle size of the coarse crushing mechanism is relatively large, and it is only for pretreatment. During the pretreatment process, smaller coal and gangue can still pass through the coarse crushing mechanism and continue to be crushed by the fine crushing mechanism, which does not affect the transportation efficiency. The pretreated coal and gangue are already smaller than the initial size when they fall directly from the tunnel wall. The subsequent fine crushing mechanism (the crushing mechanism that crushes to meet the transportation requirements) will not directly crush larger pieces of coal and gangue, so the crushing efficiency is also higher.

[0038] The present invention is further described in detail below in conjunction with the embodiments.

[0039] The specific embodiment of the coal mine transfer machine provided by the utility model is as follows:

[0040] The coal mine transfer machine provided in this embodiment is as follows Figure 1As shown, it mainly includes four parts, namely, the material receiving system 1, the chassis 2, the anchor support system 3 and the conveying system 4. The material receiving system 1 is used to receive the coal blocks and gangue from the front excavation equipment (generally the anchor boring machine or the cantilevered excavator), and guide the coal blocks and gangue to the conveying system 4. After receiving the coal blocks and gangue, the conveying system 4 continues to convey them backwards, and the specific conveying mechanism is generally a scraper chain. The anchor support system 3 includes several anchor drilling rigs, which can perform anchor support operations on the top and the side respectively. The chassis 2 is mainly used to carry various systems, and drives the transfer machine to move as a whole through a self-moving walking mechanism (generally a crawler). The specific working principle of the transfer machine is the existing technology and will not be described in detail. The following mainly introduces the material receiving system 1 that is the focus of improvement in the utility model.

[0041] Receiving system 1 Figure 1 and Figure 2 As shown, it mainly includes a frame 13, and the rear end of the frame 13 is provided with a connection structure for connecting to a transfer machine, which can be a flange. As a part of the receiving system 1, the frame 13 is provided with a feed port 131, and coal blocks and gangue can enter the receiving system 1 through the feed port 131. The frame 13 is also provided with a conveying mechanism. The frame 13 is a box-shaped structure with a hollow interior, and a conveying channel 132 is provided inside. The conveying mechanism (not shown in the figure) can be installed in the conveying channel 132. After the conveying mechanism receives the coal blocks and gangue entering from the feed port 131, it continues to convey them backwards. Specifically, the conveying mechanism here can be the conveying mechanism of the transfer machine, or an independent conveying mechanism can be set for the receiving system 1, but the independent conveying mechanism must be overlapped with the conveying mechanism of the transfer machine.

[0042] In order to facilitate the description of the positions of various components, the feeding direction of the conveying mechanism is first defined as the front-to-back direction, and the side close to the feed port 131 is the front, that is, the coal blocks and gangue are conveyed from front to back.

[0043] The frame 13 is provided with a coarse crushing mechanism 11 and a fine crushing mechanism 12 arranged in front and behind, that is, the coarse crushing mechanism 11 is located upstream of the fine crushing mechanism 12, and the crushing particle size (the size of the material that can be allowed to pass after crushing) of the coarse crushing mechanism 11 is larger than the crushing particle size of the fine crushing mechanism 12. The coarse crushing mechanism 11 can pre-crush the coal blocks and gangue, and the fine crushing mechanism 12 can perform secondary crushing on the pre-crushed coal blocks and gangue until they are crushed to a size that can be normally transported by the belt conveyor.

[0044] Specifically, the coarse crushing mechanism 11 is arranged at the feed port 131. This not only can play a crushing role, but also can play a buffering role, preventing large pieces of coal and gangue from falling and damaging the conveying mechanism.

[0045] More specifically, the coarse crushing mechanism 11 includes two coarse crushing drums arranged in the front-to-back direction, namely the front crushing drum 112 and the rear crushing drum 111. It should be noted that the coarse crushing drum referred to here is not a limitation on the diameter of the crushing drum, but should be understood as the crushing drum of the coarse crushing mechanism 11. The front crushing drum 112 and the rear crushing drum 111 are respectively equipped with a driving device, and the rotation directions of the front crushing drum 112 and the rear crushing drum 111 are opposite. The outer periphery of the front crushing drum 112 and the rear crushing drum 111 are provided with a plurality of crushing cutters. During the rotation of the two crushing drums, large pieces of coal and gangue can be pre-crushed. In other embodiments, the number of crushing drums can also be greater than two, which can be matched and set by those skilled in the art according to the size of the feed port 131, but in order to meet the crushing effect, the rotation directions of the two adjacent crushing drums should be opposite.

[0046] The specific structures of the front crushing drum 112 and the rear crushing drum 111 are as follows: Figure 3 and Figure 4 As shown, the rear crushing drum 111 includes a first drive motor 113, a first reducer 114, a rear drum 1111, a first bearing seat 116, etc., the two ends of the rear drum 1111 are mounted on the first bearing seat 116, the rear crushing drum 111 is mounted on the frame 13 through the first bearing seat 116, and the first drive motor 113 is connected to the rear drum 1111 through the first reducer 114. The front crushing drum 112 includes a first drive motor 113, a first reducer 114, a front drum 1121, a first bearing seat 116, etc., the two ends of the front drum 1111 are mounted on the first bearing seat 116, the front crushing drum 112 is mounted on the frame 13 through the first bearing seat 116, and the first drive motor 113 is connected to the front drum 1121 through the first reducer 114. In this embodiment, a hydraulic motor is selected as the driving device because the hydraulic motor has a small overall volume and is easy to install. In other embodiments, a driving motor can also be selected.

[0047] In addition, in other embodiments, the crushing drum may not be completely mounted through the bearing seat. Figure 3 Taking the rear crushing drum 111 in the example, the rear crushing drum 111 can be installed on the frame 13 through the shell of the first reducer 114.

[0048] like Figure 3 and Figure 4As shown, in this embodiment, the crushing tool arranged on the periphery of the front crushing drum 112 and the rear crushing drum 111 includes a pick disc 117, and a plurality of picks 115 are arranged on the periphery of the pick disc 117. This type of pick type crushing tool has a higher crushing effect on coal blocks and gangue. Of course, in other embodiments, a crushing tool with a cutter ring can also be selected, similar to the disc cutter configured in a full-face tunneling machine, including a cutter seat and a cutter ring on the periphery of the cutter seat, and the cutter ring can be a cemented carbide or a polycrystalline diamond composite sheet, and the cutter seat is mounted on the (front / rear) drum.

[0049] Furthermore, in order to enhance the crushing effect of the pick 115, the extension direction of the pick 115 after installation in this embodiment is parallel to the tangent direction of the (front / rear) crushing drum, and the head of the pick 115 can be directly inserted into the coal and gangue, and the crushing effect is better. In other embodiments, the extension direction of the pick 115 after installation may not be completely parallel to the tangent direction of the (front / rear) crushing drum, and the crushing effect is slightly worse, but it can still be used for tunnel excavation with a high coal content (coal is soft and easy to crush).

[0050] In other embodiments, the above-mentioned crushing drum (hollow structure) can be directly replaced by a crushing roller (solid structure) with the same effect.

[0051] In other embodiments, the coarse crushing mechanism 11 arranged at the feed port 131 may also adopt other structures besides the crushing drum, such as a circular cutter disc, with cutters provided on the end face and the outer peripheral surface of the cutter disc. Two cutter discs with opposite end faces may be arranged at the feed port 131, and the rotation axis of the cutter disc extends in the front-to-back direction, so that the coal blocks and gangue entering the feed port 131 can be crushed by the cutter disc.

[0052] In order to expand the material receiving range of the feed port 131, a hopper is also provided at the position of the feed port 131 in this embodiment. Specifically, the hopper is formed by splicing (welding or bolting) multiple hopper plates 141. In other embodiments, the hopper can also be directly formed by bending a hopper plate 141. Figure 1 and Figure 2 As shown, in this embodiment, part of the coarse crushing mechanism 11 is higher than the frame 13, and the hopper is provided with an escape port 142 for avoiding the coarse crushing mechanism 11. At this time, under the material collection function of the hopper, it is still possible to ensure that the coal blocks and gangue can smoothly enter the feed port 131. Moreover, at this time, the coarse crushing mechanism 11 is at a higher position, and the gap between the coarse crushing mechanism 11 and the conveying mechanism below is also larger, so that the coal blocks and gangue that fall first will not have too much speed, and the impact momentum on the coarse crushing mechanism 11 becomes smaller, which can protect the coarse crushing mechanism 11. In addition, it is also convenient for the crushed coal blocks and gangue to pass through the gap between the coarse crushing mechanism 11 and the conveying mechanism.

[0053] like Figure 5As shown, the fine crushing mechanism 12 in this embodiment is also a crushing mechanism of the drum pick type. Specifically, it includes a fine crushing drum 124, a second drive motor 121, a second reducer 123, a reducer mounting seat 122, a second bearing seat 125, etc. The outer periphery of the fine crushing drum 124 is provided with a pick plate 117 and a pick 115. The second drive motor 121 is connected to the fine crushing drum 124 through the second reducer 123. The reducer mounting seat 122 is arranged on the outer shell of the second reducer 123. During installation, one end is mounted on the frame 13 through the reducer mounting seat 122, and the other end is mounted on the frame 13 through the second bearing seat 125. Of course, the fine crushing drum 124 at this time can also be equivalently replaced by a fine crushing roller. Similarly, the fine crushing drum 124 referred to here should not be understood as the diameter of the crushing drum, but refers to the crushing drum of the fine crushing mechanism.

[0054] In order to facilitate understanding and avoid confusion, the pick disc of the coarse crushing mechanism 11 can also be called a coarse pick disc, and the picks on the coarse pick disc can be called coarse crushing picks, and the pick disc of the fine crushing mechanism 12 can also be called a fine pick disc, and the picks on the fine pick disc can also be called fine crushing picks. The thickness here only means that the part is a part of the coarse crushing mechanism 11 or the fine crushing mechanism 12, and should not be understood as the thickness of the diameter.

[0055] In other embodiments, the fine crushing mechanism 12 may also be a drum with a disc-shaped cutter with a cutter ring sleeved on the outer circumference.

[0056] In other embodiments, the coarse crushing mechanism 11 may not be arranged at the feed inlet 131, for example, Figure 2 The coarse crushing mechanism 11 can still play a pre-crushing role beside the medium and fine crushing mechanism 12 (not at the feed port 131). In order to play a buffering role, a chain that can play a buffering role can be set at the feed port 131.

[0057] When this embodiment is used, the coarse crushing mechanism 11 can pre-crush the coal and gangue. During the crushing process of the coarse crushing mechanism 11, the fine crushing mechanism 12 can simultaneously crush relatively small coal and gangue, which is highly efficient. Taking specific values ​​as an example, the crushing particle size of the coarse crushing mechanism 11 can be set to 300 mm, and the crushing particle size of the fine crushing mechanism 12 can be set to 150 mm (to meet the needs). At this time, coal blocks and gangue larger than 300mm are crushed to less than 300mm by the coarse crushing mechanism 11, and coal blocks and gangue smaller than 300mm pass through the coarse crushing mechanism 11. Coal blocks and gangue with a particle size between 150mm-300mm are crushed to less than 150mm by the fine crushing mechanism 12, and coal blocks and gangue smaller than 150mm pass directly through the fine crushing mechanism 12. The overall transportation is still continuous, and the fine crushing mechanism 12 crushes coal blocks and gangue smaller than 300mm. The coarse crushing mechanism 11 only needs to crush the coal blocks and gangue to less than 300mm. Therefore, both the fine crushing mechanism 12 and the coarse crushing mechanism 11 do not require higher configurations.

[0058] The specific embodiment of the material receiving system 1 of the coal mine transfer machine in the utility model:

[0059] The material receiving system 1 of the coal mine transfer machine has the same structure as the material receiving system 1 described in the above-mentioned embodiment of the coal mine transfer machine, and will not be described in detail here.

[0060] Finally, it should be noted that the above is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments without creative work, or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A material receiving system for a coal mine transfer machine, comprising a frame, a feed port and a conveying mechanism are arranged on the frame, characterized in that: The frame is provided with a coarse crushing mechanism and a fine crushing mechanism arranged along the feeding direction of the conveying mechanism. The coarse crushing mechanism is located upstream of the fine crushing mechanism, and the crushing particle size of the coarse crushing mechanism is larger than that of the fine crushing mechanism.

2. The material receiving system of the coal mine transfer machine according to claim 1, characterized in that: The coarse crushing mechanism is arranged at the feed inlet.

3. The material receiving system of the coal mine transfer machine according to claim 2, characterized in that: The coarse crushing mechanism comprises at least two coarse crushing rollers or coarse crushing drums arranged along the feeding direction and rotatably mounted on the frame, the outer periphery of the coarse crushing rollers or coarse crushing drums is provided with coarse crushing cutters, and the rotation directions of two adjacent coarse crushing rollers or coarse crushing drums are opposite.

4. The material receiving system of the coal mine transfer machine according to claim 3, characterized in that: The coarse crushing tool comprises a coarse cutting tooth disc sleeved on the outer periphery of the coarse crushing roller or the coarse crushing drum, and a plurality of coarse crushing cutting teeth are arranged on the outer periphery of the coarse cutting tooth disc.

5. The material receiving system of the coal mine transfer machine according to claim 4, characterized in that: The extending direction of the coarse crushing pick is parallel to the tangential direction of the coarse crushing roller or the coarse crushing drum.

6. The material receiving system of the coal mine transfer machine according to any one of claims 2 to 5, characterized in that: A hopper is arranged at the feeding port, a part of the coarse crushing mechanism is higher than the frame, and the hopper is provided with an escape opening for avoiding the coarse crushing mechanism.

7. The material receiving system of the coal mine transfer machine according to any one of claims 1 to 5, characterized in that: The fine crushing mechanism comprises a fine crushing roller or a fine crushing drum rotatably mounted on a frame, and fine crushing cutters are arranged on the periphery of the fine crushing roller or the fine crushing drum.

8. The material receiving system of the coal mine transfer machine according to claim 7, characterized in that: The fine crushing tool comprises a fine cutting tooth disk sleeved on the outer periphery of the fine crushing roller or the fine crushing drum, and a plurality of fine crushing cutting teeth are arranged on the outer periphery of the fine cutting tooth disk.

9. The material receiving system of the coal mine transfer machine according to claim 8, characterized in that: The extension direction of the fine crushing pick is parallel to the tangential direction of the fine crushing roller or the fine crushing drum.

10. A transfer machine for coal mines, comprising a material receiving system and a conveying system, characterized in that: The material receiving system is the material receiving system of the coal mine transfer machine as described in any one of claims 1-9.

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