Cutting speed reducer with internal spraying function and heading machine

Abstract

The invention relates to the technical field of excavating equipment, in particular to a cutting speed reducer with an internal spraying function and a heading machine. According to the cutting speed reducer with the internal spraying function, a speed reducing mechanism is provided with an input shaft and an output shaft connected with a cutting head shaft; the water pump is arranged in the mounting cavity of the output shaft and provided with a water supply channel; a water inlet communicated with the water supply passage is formed in the sealing sleeve positioned on the circumferential outer wall of the output shaft; the transmission shaft is connected with the input shaft and the water pump so that the rotating speed difference between the input shaft and the output shaft drives the water pump. The bearing sleeve is arranged on the circumferential outer wall of the sealing sleeve in a sleeving mode, the output shaft rotates relative to the bearing sleeve, and a water inlet channel communicated with the water inlet is formed in the bearing sleeve. The water pump is installed on the output shaft, the water pump is driven through the rotating speed difference between the input shaft and the output shaft, an oil way for driving the water pump does not need to be additionally arranged, the overall structure is simpler and more compact, installation is convenient, fault points are few, and internal spraying standardization is easy to achieve.

Description

Technical Field

[0001] This invention relates to the field of mining equipment technology, and in particular to a cutting reducer and tunneling machine with internal spraying function. Background Technology

[0002] A tunneling machine (TBM) is a combined unit capable of cutting, loading and transporting, self-propelled movement, and dust suppression via spraying. The cutting section of a TBM includes a cutting head shaft and a cutting head. The cutting head shaft drives the cutting head to rotate, thus breaking the rock. An internal spray system is typically installed inside the TBM for cooling and dust suppression. Currently, to supply high-pressure water to the cutting head, a water pump is mounted on the cutting head shaft. This significantly weakens the strength of the cutting head shaft and components such as the splined sleeve in the cutting section. The wide variety of pumps also hinders the standardization of the internal spray system. Furthermore, existing water pumps are hydraulically driven, requiring the installation of hydraulic oil inlet and return paths, resulting in complex structures, numerous components, and a higher susceptibility to malfunctions. Summary of the Invention

[0003] In view of this, the purpose of this application is to provide a cutting reducer and a tunneling machine with internal spraying function, so as to solve the problems of the existing tunneling machine's internal spraying system, which installs the water pump on the cutting head shaft, reduces the strength of the cutting head shaft, and the water pump is driven by hydraulic power, resulting in complex structure, many failure points, and a wide variety of types, which is not conducive to the standardized implementation of internal spraying structure.

[0004] The first aspect of the present invention provides a cutting speed reducer with an internal spraying function, comprising: The speed reduction mechanism has an input shaft and an output shaft connected to the cutting head shaft, wherein a recessed mounting cavity is formed at the end of the output shaft facing the cutting head shaft; A water pump is installed inside the mounting cavity and has a water supply passage. The output end of the water supply passage is formed as a high-pressure water outlet that communicates with the internal flow channel inside the cutting head shaft. A sealing sleeve is provided on the circumferential outer wall of the output shaft, and an inlet communicating with the water supply passage is provided on the sealing sleeve. A drive shaft is connected to both the input shaft and the water pump, such that the speed difference between the input shaft and the output shaft drives the water pump. A bearing sleeve is fitted onto the circumferential outer wall of the sealing sleeve. The output shaft rotates relative to the bearing sleeve. The bearing sleeve is provided with a water inlet channel communicating with the water inlet.

[0005] Preferably, the axis of the water pump is arranged parallel to the axis of the output shaft, or the axis of the water pump coincides with the axis of the output shaft.

[0006] Preferably, the sealing sleeve is formed as a cylindrical structure sleeved on the circumferential outer wall of the output shaft, and the sealing sleeve is fixedly connected to the output shaft. The output shaft has an inlet channel that is connected to the water supply passage and the water inlet respectively.

[0007] Preferably, the circumferential inner wall of the sealing sleeve is provided with a plurality of first sealing portions arranged at intervals along the axial direction, the first sealing portions being in contact with the surface of the output shaft, and the water inlet being disposed between two adjacent first sealing portions.

[0008] Preferably, the bearing sleeve is formed as a cylindrical structure fitted onto the sealing sleeve, and the water inlet channel includes a water inlet cavity formed by a recess in the inner wall of the bearing sleeve and a water inlet hole opened on the outer wall of the bearing sleeve to communicate with the water inlet cavity.

[0009] Preferably, the bearing sleeve has a plurality of second sealing portions arranged axially at intervals on its circumferential inner wall, the second sealing portions being in contact with the surface of the sealing sleeve, and the water inlet cavity being disposed between two adjacent second sealing portions.

[0010] Preferably, a plurality of first bearings are provided between the bearing sleeve and the sealing sleeve; at least two of the first bearings are provided at both ends of all the second seals in the axial direction, and the lubrication system in the reduction mechanism supplies lubricating oil to the first bearings; In the axial direction, the first bearing, which is located on the side of the second sealing part facing the cutting head shaft, has a sealing component on the side facing away from the second sealing part. Preferably, the deceleration mechanism includes: The second bearing is located on the circumferential outer side of the output shaft; The output bearing housing is located on the circumferential outer side of the second bearing; A bearing cover is fixed to the side of the output bearing housing facing the cutting head shaft in the axial direction, and the bearing sleeve is fixedly connected to the bearing cover.

[0011] Preferably, it further includes: A sealing bushing is provided, wherein the high-pressure water outlet is embedded in the mounting cavity, and the sealing bushing is connected to the high-pressure water outlet and the internal flow channel respectively; A limiting member is installed in the mounting cavity and is located on the side of the water pump facing the cutting head shaft.

[0012] A second aspect of the present invention provides a tunneling machine, including the cutting reducer with internal spraying function as described in any of the above technical solutions.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: In the cutting reducer with internal spraying function of the present invention, the reduction mechanism has an input shaft and an output shaft connected to the cutting head shaft. A recessed mounting cavity is formed at the end of the output shaft facing the cutting head shaft. A water pump is disposed within the mounting cavity and has a water supply passage. The output end of the water supply passage is formed as a high-pressure water outlet communicating with an internal flow channel within the cutting head shaft. A sealing sleeve is provided on the circumferential outer wall of the output shaft, and an inlet communicating with the water supply passage is provided on the sealing sleeve. A drive shaft is connected to both the input shaft and the water pump, such that the speed difference between the input shaft and the output shaft drives the water pump. A bearing sleeve is fitted onto the circumferential outer wall of the sealing sleeve, and the output shaft rotates relative to the bearing sleeve. An inlet communicating with the water inlet is provided on the bearing sleeve. The water channel, by mounting the water pump on the output shaft of the reduction mechanism, enables the cutting reducer to provide high-pressure water to the internal flow channel on the cutting head shaft. This design is easy to manufacture, compact in structure, and allows for internal spraying by replacing a few parts on existing equipment. It is easy to standardize internal spraying without weakening the structural strength of the cutting head shaft. Furthermore, the shorter output shaft compared to the cutting head shaft makes manufacturing easier. In addition, the water pump is driven by the speed difference between the input and output shafts of the reduction mechanism, eliminating the need for additional oil circuits to drive the water pump. This makes the overall structure simpler, more compact, easier to install, and reduces potential failure points, thereby improving the performance and service life of the tunneling machine.

[0014] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0015] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0016] Figure 1 A schematic diagram of a cutting reducer with internal spraying function provided for an embodiment of the present invention; Figure 2 A structural cross-sectional view of a cutting reducer with internal spraying function provided for an embodiment of the present invention; Figure 3 A schematic diagram of the assembly of the output shaft and the cutting head shaft of a cutting reducer with internal spraying function provided for an embodiment of the present invention; Figure 4 A cross-sectional view of the assembly of the output shaft and the cutting head shaft of a cutting reducer with internal spray function provided in an embodiment of the present invention.

[0017] Icons: 10-Reduction mechanism; 100-Water inlet; 11-Input shaft; 12-Output shaft; 122-Water inlet channel; 101-Sealing sleeve; 1010-First sealing part; 1011-Splined part; 1012-Water inlet; 30-Water pump; 31-Water supply passage; 311-High-pressure water outlet; 40-Cutting head shaft; 41-Internal channel; 42-Cylinder; 50-Drive shaft; 51-Splined sleeve; 60-Bearing sleeve; 61-Water inlet channel; 611-Water inlet cavity; 612-Water inlet hole; 62-Second sealing part; 71-First bearing; 72-Oil seal; 73-Sealing cover; 81-Second bearing; 82-Output bearing seat; 83-Bearing cover; 90-Sealing bushing; 91-Limiting element; 1000-Connecting pipe; 1001-Connector. Detailed Implementation

[0018] The following detailed embodiments are provided to help the reader gain a comprehensive understanding of the methods, apparatus, and / or systems described herein. However, various changes, modifications, and equivalents of the methods, apparatus, and / or systems described herein will be apparent after understanding the disclosure of this application. For example, the order of operations described herein is merely illustrative and is not limited to the order set forth herein; changes that will be apparent after understanding the disclosure of this application are possible, except for operations that must occur in a specific order. Furthermore, for clarity and brevity, descriptions of features known in the art may be omitted.

[0019] The features described herein may be implemented in different forms and should not be construed as being limited to the examples described herein. Rather, the examples described herein have been provided merely to illustrate some of the many feasible ways of implementing the methods, apparatus, and / or systems described herein that will be apparent upon understanding the disclosure of this application.

[0020] Throughout the specification, when an element (such as a layer, region, or substrate) is described as being "on" another element, "connected to" another element, "bonded to" another element, "on" another element, or "covering" another element, it may be directly "on" another element, "connected to" another element, "bonded to" another element, "on" another element, or "covering" another element, or there may be one or more other elements in between. In contrast, when an element is described as being "directly on" another element, "directly connected to" another element, "directly bonded to" another element, "directly on" another element, or "directly covering" another element, there may be no other elements in between.

[0021] As used herein, the term “and / or” includes any one of the relevant items listed and any combination of any two or more items.

[0022] Although terms such as “first,” “second,” and “third” may be used herein to describe individual components, assemblies, regions, layers, or parts, these components, assemblies, regions, layers, or parts are not limited by these terms. Rather, these terms are used only to distinguish one component, assembly, region, layer, or part from another. Therefore, without departing from the teachings of the examples described herein, the first component, assembly, region, layer, or part referred to as the second component, assembly, region, layer, or part may also be referred to as the second component, assembly, region, layer, or part.

[0023] For ease of description, spatial relation terms such as “above,” “upper,” “below,” and “lower” are used herein to describe the relationship between one element and another, as shown in the accompanying drawings. Such spatial relation terms are intended to include not only the orientation depicted in the drawings but also different orientations of the device during use or operation. For example, if the device in the drawings is flipped, an element described as being “above” or “upper” relative to another element will subsequently be “below” or “lower” relative to that other element. Therefore, the term “above” includes both “above” and “below” orientations depending on the spatial orientation of the device. The device may also be positioned in other ways (e.g., rotated 90 degrees or in other orientations), and the spatial relation terms used herein will be interpreted accordingly.

[0024] The terminology used herein is for the purpose of describing various examples only and is not intended to limit this disclosure. Unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. The terms “comprising,” “including,” and “having” enumerate the stated features, quantities, operations, components, elements, and / or combinations thereof, but do not exclude the presence or addition of one or more other features, quantities, operations, components, elements, and / or combinations thereof.

[0025] Variations in the shapes shown in the accompanying drawings may occur due to manufacturing techniques and / or tolerances. Therefore, the examples described herein are not limited to the specific shapes shown in the accompanying drawings, but include changes in shape that may occur during manufacturing.

[0026] The features of the examples described herein can be combined in various ways that will be apparent upon understanding the disclosure of this application. Furthermore, although the examples described herein have a wide variety of constructions, other constructions are possible, as will be apparent upon understanding the disclosure of this application.

[0027] According to a first aspect of the present invention, a cutting reducer with an internal spray function is provided, which includes a reduction mechanism 10, a water pump 30, a drive shaft 50, and a bearing sleeve 60.

[0028] The specific structure of the above-mentioned components of the cutting reducer with internal spray function according to this embodiment will be described below.

[0029] In this embodiment, as Figure 1 and Figure 2 As shown, the reduction mechanism 10 has an input shaft 11 and an output shaft 12 connected to the cutting head shaft 40, so that the output shaft 12 provides power to the cutting head shaft 40. Specifically, the output shaft 12 and the cutting head shaft 40 are fixedly connected by a spline sleeve. The spline sleeve is fixed to the output shaft 12 by a fixing pin to prevent the spline sleeve from moving axially. The kinetic energy output by the input shaft 11 is transmitted to the output shaft 12 through a planetary gear train or other reduction components, so that a speed difference is formed between the input shaft 11 and the output shaft 12. A recessed mounting cavity is formed at the end of the output shaft 12 facing the cutting head shaft 40. The mounting cavity can be a structure formed by the inward recess of the axial end of the output shaft 12.

[0030] like Figure 2 and Figure 4 As shown, the water pump 30 is installed in the mounting cavity, so that the entire water pump 30 can rotate together with the output shaft 12. The water pump 30 has a water supply passage 31. An external water source enters the water supply passage 31 and drives the water pump 30 to pressurize the water to form high-pressure water. The output end of the water supply passage 31 is formed as a high-pressure water outlet 311 that communicates with the internal flow channel 41 in the cutting head shaft 40. In this way, the high-pressure water flowing out of the high-pressure water outlet 311 is transported to the internal flow channel 41. A nozzle is installed at the end of the internal flow channel 41, so that water mist is sprayed out from the nozzle.

[0031] In this embodiment, a sealing sleeve 101 is provided on the circumferential outer wall of the output shaft 12, and an inlet 1012 communicating with the water supply passage 31 is provided on the sealing sleeve 101; a bearing sleeve 60 is sleeved on the circumferential outer wall of the sealing sleeve 101, and the output shaft 12 rotates relative to the bearing sleeve 60, that is, the bearing sleeve 60 does not rotate synchronously with the output shaft 12. A water inlet channel 61 communicating with the inlet 1012 is provided on the bearing sleeve 60, so that external water can pass through the water inlet channel 61 on the bearing sleeve 60 and the water inlet 1012 on the sealing sleeve 101 in sequence and enter the water pump 30.

[0032] like Figure 2 and Figure 4As shown, the drive shaft 50 is connected to the input shaft 11 and the water pump 30 respectively, so that the speed difference between the input shaft 11 and the output shaft 12 drives the water pump 30. That is, the speed difference between the input shaft 11 and the output shaft 12 provides driving force for the operation of the water pump 30. In this way, there is no need to use hydraulic power to drive the water pump 30. Only water circuits need to be laid. Thus, by installing the water pump 30 on the output shaft 12 of the reduction mechanism 10, the cutting reducer has the ability to provide high-pressure water to the internal flow channel 41 on the cutting head shaft 40. The processing difficulty is low, the structure is compact, and the internal spraying function can be achieved by replacing a few parts on existing equipment without weakening the structural strength of the cutting head shaft 40. In addition, the speed difference between the input shaft 11 and the output shaft 12 of the reduction mechanism 10 is used to drive the water pump 30. Therefore, there is no need to add an additional oil circuit to drive the water pump 30, making the overall structure simpler, more compact, easier to install, and with fewer failure points, thereby improving performance and service life.

[0033] Specifically, such as Figure 2 and Figure 4 As shown, the drive shaft 50 is connected to the power input end of the water pump 30 via a spline sleeve 51. The power input end of the water pump 30 can be a shaft-like structure. More specifically, in this embodiment, the water pump 30 can be a rotary pump, such as a rotary power plunger pump, as long as the working chamber volume can be changed by the rotational driving force to achieve fluid delivery.

[0034] Furthermore, such as Figure 4 As shown, the water inlet side of the water inlet channel 61 on the bearing sleeve 60 can be connected to a connecting pipe 1000 to facilitate the supply of external water. Connectors 1001 can be installed at both ends of the connecting pipe 1000, thus enabling the assembly of the connecting pipe 1000 via the connectors 1001. Furthermore, as... Figure 3 and Figure 4 As shown, the housing of the deceleration mechanism 10 is provided with a water inlet 100, which can be a through hole. The water inlet 100 is equipped with a connector 1001, thus realizing the lead-out of the connecting pipe 1000.

[0035] In a preferred embodiment, the axis of the water pump 30 is set parallel to the axis of the output shaft 12, or the axis of the water pump 30 coincides with the axis of the output shaft 12. This reduces the weakening of the structural strength of the output shaft 12 by the opening of the mounting cavity, thereby improving the performance and service life of the reduction mechanism 10.

[0036] In an alternative embodiment, the sealing sleeve 101 and the output shaft 12 are formed as an integral structure.

[0037] To facilitate maintenance and modular assembly, a channel structure is machined connecting the bearing sleeve 60 and the water pump 30 to meet water supply requirements. In a preferred embodiment, such as... Figure 2 and Figure 4As shown, the sealing sleeve 101 and the output shaft 12 are formed as separate structures, so that the sealing sleeve 101 is formed as a cylindrical structure sleeved on the circumferential outer wall of the output shaft 12, and the sealing sleeve 101 is fixedly connected to the output shaft 12, so that the sealing sleeve 101 and the output shaft 12 rotate synchronously. The output shaft 12 is provided with an inlet channel 122 that is connected to the water supply passage 31 and the water inlet 1012 respectively, so that the water entering the water inlet 1012 can flow to the water supply passage 31 through the inlet channel 122.

[0038] Preferably, the water inlet channel 61 on the output shaft 12 extends radially. It should be noted that the number of water inlets 1012 can be one or more, depending on the water supply requirements. The water inlet channel 61 can be set up in a one-to-one correspondence with the water inlet 1012, or one water inlet channel 61 can correspond to multiple water inlets 1012, or other arrangements can be made, as long as the water supply requirements can be met.

[0039] Furthermore, such as Figure 2 and Figure 4 As shown, the end of the sealing sleeve 101 on the shaft is provided with the spline portion 1011 that mates with the output shaft 12, thereby achieving the circumferential positioning of the sealing sleeve 101 and the output shaft 12. The axial displacement of the sealing sleeve 101 can be limited by the shoulder structure and / or positioning components such as the retaining ring installed on the output shaft 12.

[0040] Preferably, the sealing sleeve 101 is a ceramic part or the surface of the sealing sleeve 101 that mates with the second sealing part 62 as described below is provided with a ceramic layer to improve wear resistance and extend service life.

[0041] Furthermore, such as Figure 2 and Figure 4 As shown, a plurality of first sealing portions 1010 are provided on the circumferential inner wall of the sealing sleeve 101, arranged axially at intervals. The first sealing portions 1010 contact the surface of the output shaft 12, so that the first sealing portions 1010 and the surface of the output shaft 12 form a static seal. Specifically, the first sealing portion 1010 includes a groove structure opened in the inner wall of the sealing sleeve 101 and a sealing ring embedded in the groove structure, with a portion of the sealing ring protruding outside the groove structure to contact the surface of the output shaft 12. The water inlet 1012 is provided between two adjacent first sealing portions 1010.

[0042] like Figure 2 and Figure 4As shown, the bearing sleeve 60 is formed as a cylindrical structure fitted onto the sealing sleeve 101. The water inlet channel 61 includes a water inlet cavity 611 formed by a recess in the inner wall of the bearing sleeve 60 and a water inlet hole 612 opened on the outer wall of the bearing sleeve 60 to communicate with the water inlet cavity 611. Preferably, the water inlet cavity 611 is formed as an annular cavity structure, and the number of water inlets 1012 communicating with the water inlet cavity 611 can be one or more depending on actual needs.

[0043] Furthermore, such as Figure 2 and Figure 4 As shown, a plurality of second sealing portions 62 are provided on the circumferential inner wall of the bearing sleeve 60, arranged axially at intervals. The second sealing portions 62 are in contact with the surface of the sealing sleeve 101. Each second sealing portion 62 includes an annular groove structure formed in the circumferential inner wall of the bearing sleeve 60 and a sealing ring embedded in the annular groove structure. The sealing ring is a rotation seal, and a portion of the sealing ring protrudes beyond the annular groove structure on the bearing sleeve 60, making it contact the circumferential outer wall of the sealing sleeve 101. Axially, a water inlet cavity 611 is disposed between two adjacent second sealing portions 62.

[0044] like Figure 2 and Figure 4 As shown, multiple first bearings 71 are provided between the bearing sleeve 60 and the sealing sleeve 101; at least two first bearings 71 are provided at both ends of all the second sealing parts 62 in the axial direction. The lubrication system in the reduction mechanism 10 supplies lubricating oil to the first bearings 71, that is, the lubricating oil in the reduction mechanism 10 can flow to the first bearings 71 to achieve lubrication of the first bearings 71. In this way, there is no need to set up an additional oil circuit for lubricating the first bearings 71, the structure is more reasonable and compact, and the number of failure points is reduced.

[0045] Furthermore, in this embodiment, a lubrication channel connecting the first bearing 71 can be formed on the bearing sleeve 60, so that the first bearings 71 on both sides of the second sealing part 62 in the axial direction can be lubricated. For example... Figure 2 and Figure 4 As shown, in the axial direction, the first bearing 71, which is located on the side of the second sealing part 62 facing the cutting head shaft 40, has a sealing assembly on the side facing away from the second sealing part 62 to prevent lubricating oil leakage. Specifically, the sealing assembly includes an oil seal 72 and a sealing cap 73. The oil seal 72 is installed on the circumferential outer wall of the sealing sleeve 101, and the sealing cap 73 is installed on the circumferential outer wall of the oil seal 72 and fixed to the axial end of the bearing sleeve 60. In this embodiment, as Figure 2 and Figure 4As shown, the reduction mechanism 10 includes a second bearing 81, an output bearing seat 82, and a bearing cover 83. The second bearing 81 is located on the circumferential outer side of the output shaft 12 and is positioned on the side of the water pump 30 away from the cutting head shaft 40. The output bearing seat 82 is located on the circumferential outer side of the second bearing 81. The bearing cover 83 is fixed on the side of the output bearing seat 82 facing the cutting head shaft 40 in the axial direction. The bearing sleeve 60 is fixedly connected to the bearing cover 83. In this way, the bearing sleeve 60 can be directly fixed to the reduction mechanism 10 without being fixed to the cylinder 42 of the cantilever section of the cutting part, which has the advantages of compact structure and convenient installation.

[0046] In this embodiment, as Figure 2 and Figure 4 As shown, the cutting reducer with internal spray function also includes a sealing bushing 90 and a limiting member 91. The sealing bushing 90 has an internal channel for high-pressure water to pass through, and a high-pressure water outlet 311 is embedded in the mounting cavity. The sealing bushing 90 is connected to both the high-pressure water outlet 311 and the internal flow channel 41, thus meeting the needs of different installation depths of the water pump 30. The end of the sealing bushing 90 facing the cutting head shaft 40 is embedded in the internal channel of the cutting head shaft 40, and a sealing ring is provided on the circumferential side wall of the portion embedded in the internal channel to achieve a sealed assembly. The limiting member 91 is formed as a cylindrical structure surrounding the sealing bushing 90. The limiting member 91 is installed in the mounting cavity and is located on the side of the water pump 30 facing the cutting head shaft 40. The limiting member 91 is fixedly connected to the output shaft 12, thereby realizing the fixed connection between the water pump 30 and the output shaft 12 through the limiting member 91, so that the drive shaft 50 can drive the water pump 30 to operate. The limiting member 91 can be a pressure cap.

[0047] According to the present invention, the cutting reducer with internal spray function has an input shaft and an output shaft connected to the cutting head shaft. The end of the output shaft facing the cutting head shaft has a recessed mounting cavity. A water pump is installed in the mounting cavity and has a water supply passage. The output end of the water supply passage is formed as a high-pressure water outlet communicating with the internal flow channel inside the cutting head shaft. A sealing sleeve is provided on the circumferential outer wall of the output shaft, and a water inlet communicating with the water supply passage is provided on the sealing sleeve. A drive shaft is connected to the input shaft and the water pump respectively, so that the speed difference between the input shaft and the output shaft drives the water pump. A bearing sleeve is fitted on the circumferential outer wall of the sealing sleeve, and the output shaft rotates relative to the bearing sleeve. A water inlet channel communicating with the water inlet is provided on the bearing sleeve. In this way, by installing the water pump on the output shaft of the reduction mechanism, the cutting reducer has the ability to provide high-pressure water to the internal flow channel on the cutting head shaft. The processing difficulty is low, the structure is compact, and the internal spray function can be realized by replacing a few parts on existing equipment without weakening the structural strength of the cutting head shaft. Moreover, the output shaft is shorter than the cutting head shaft, which makes the processing difficulty low. Furthermore, the water pump is driven by the speed difference between the input and output shafts of the reduction mechanism, eliminating the need for an additional oil circuit to drive the water pump. This makes the overall structure simpler, more compact, easier to install, and reduces the number of potential failure points, thereby improving performance and service life.

[0048] A second aspect of the present invention provides a tunneling machine, including a cutting reducer with an internal spraying function as described above, wherein the structural strength of the cutting head shaft is guaranteed, and the water pump is driven by the speed difference between the input shaft and the output shaft of the reduction mechanism, thereby improving the performance and service life of the tunneling machine.

[0049] Finally, it should be noted that the above-described embodiments are merely specific implementations of this application, used to illustrate the technical solutions of this application, and not to limit them. The protection scope of this application is not limited thereto. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features, within the technical scope disclosed in this application. Such modifications, changes, 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 this application, and should all be covered within the protection scope of this application. Therefore, the protection scope of this application should be determined by the protection scope of the claims.

Claims

1. A cutting reducer with internal spraying function, characterized in that, include: The speed reduction mechanism has an input shaft and an output shaft connected to the cutting head shaft, wherein a recessed mounting cavity is formed at the end of the output shaft facing the cutting head shaft; A water pump is installed inside the mounting cavity and has a water supply passage. The output end of the water supply passage is formed as a high-pressure water outlet that communicates with the internal flow channel inside the cutting head shaft. A sealing sleeve is provided on the circumferential outer wall of the output shaft, and an inlet communicating with the water supply passage is provided on the sealing sleeve. A drive shaft is connected to both the input shaft and the water pump, such that the speed difference between the input shaft and the output shaft drives the water pump. A bearing sleeve is fitted onto the circumferential outer wall of the sealing sleeve. The output shaft rotates relative to the bearing sleeve. The bearing sleeve is provided with a water inlet channel communicating with the water inlet.

2. The cutting reducer with internal spray function according to claim 1, characterized in that, The axis of the water pump is set parallel to the axis of the output shaft, or the axis of the water pump coincides with the axis of the output shaft.

3. The cutting reducer with internal spray function according to claim 1, characterized in that, The sealing sleeve is formed as a cylindrical structure sleeved on the circumferential outer wall of the output shaft, and the sealing sleeve is fixedly connected to the output shaft. The output shaft has an inlet channel that is connected to the water supply passage and the water inlet respectively.

4. The cutting reducer with internal spray function according to claim 3, characterized in that, The circumferential inner wall of the sealing sleeve is provided with a plurality of first sealing parts arranged at intervals along the axial direction. The first sealing parts are in contact with the surface of the output shaft, and the water inlet is located between two adjacent first sealing parts.

5. The cutting reducer with internal spray function according to claim 1, characterized in that, The bearing sleeve is formed as a cylindrical structure fitted onto the sealing sleeve, and the water inlet channel includes a water inlet cavity formed by the inner wall recess of the bearing sleeve and a water inlet hole opened on the outer wall of the bearing sleeve to communicate with the water inlet cavity.

6. The cutting reducer with internal spray function according to claim 5, characterized in that, The bearing sleeve has a plurality of second sealing parts arranged axially at intervals on its circumferential inner wall. The second sealing parts are in contact with the surface of the sealing sleeve, and the water inlet cavity is disposed between two adjacent second sealing parts.

7. The cutting reducer with internal spray function according to claim 6, characterized in that, A plurality of first bearings are provided between the bearing sleeve and the sealing sleeve; at least two first bearings are provided at both ends of all the second sealing portions in the axial direction, and the lubrication system in the reduction mechanism supplies lubricating oil to the first bearings; In the axial direction, the first bearing, which is located on the side of the second sealing part facing the cutting head shaft, has a sealing component on the side facing away from the second sealing part.

8. The cutting reducer with internal spray function according to claim 1, characterized in that, The deceleration mechanism includes: The second bearing is located on the circumferential outer side of the output shaft; The output bearing housing is located on the circumferential outer side of the second bearing; A bearing cover is fixed to the side of the output bearing housing facing the cutting head shaft in the axial direction, and the bearing sleeve is fixedly connected to the bearing cover.

9. The cutting reducer with internal spray function according to claim 1, characterized in that, Also includes: A sealing bushing is provided, wherein the high-pressure water outlet is embedded in the mounting cavity, and the sealing bushing is connected to the high-pressure water outlet and the internal flow channel respectively; A limiting member is installed in the mounting cavity and is located on the side of the water pump facing the cutting head shaft.

10. A tunneling machine, characterized in that, The cutting reducer with internal spray function as described in any one of claims 1 to 9.

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