Cutting reduction gear with internal spraying function and heading machine

Abstract

The utility model relates to the technical field of mining equipment, especially to a cutting speed reducer with internal spraying function and a heading machine. The cutting speed reducer with internal spraying function comprises: a water pump is installed on the output shaft of the speed reduction mechanism, and the output end of the water supply passage on the water pump is in communication with the internal flow channel in the cutting head shaft; the circumferential outer wall of the output shaft is provided with a sealing sleeve, the sealing sleeve is provided with a water inlet in communication with the water supply passage and an oil inlet and an oil return port in communication with the hydraulic oil passage on the water pump respectively; the bearing sleeve is sleeved on the sealing sleeve, the output shaft rotates relative to the bearing sleeve, the bearing sleeve is provided with a water inlet channel in communication with the water inlet, an oil inlet channel in communication with the oil inlet and an oil return channel in communication with the oil return port. The utility model has low processing difficulty, compact structure, and can realize internal spraying function by replacing a small number of parts on the existing equipment, and is easy to realize internal spraying standardization.

Description

Technical Field

[0001] This utility model 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. Internal spraying structures are typically installed within 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 reduces the structural strength of the cutting head shaft and components such as the splined sleeve in the cutting section, thus affecting the TBM's performance and service life. Furthermore, the existing internal spraying structures on the cutting section are diverse, hindering standardized implementation. Utility Model Content

[0003] In view of this, the purpose of this application is to provide a cutting reducer and a tunneling machine with internal spray function, so as to solve the problems that the water pump is installed on the cutting head shaft in the internal spray system of the existing tunneling machine, which leads to a serious reduction in the strength of the cutting head shaft, spline sleeve and other components, thereby affecting the performance and service life of the tunneling machine; and the problem that there are many types of internal spray structures, which is not conducive to standardized implementation.

[0004] The first aspect of this utility model provides a cutting speed reducer with an internal spraying function, comprising: The speed reduction mechanism has an output shaft connected to the cutting head shaft, and a recessed receiving cavity is formed at one end of the output shaft facing the cutting head shaft; A water pump is installed in the accommodating cavity and has a water supply passage and a hydraulic oil passage. The output end of the water supply passage is connected to the internal flow channel inside the cutting head shaft. A sealing sleeve is provided on the circumferential outer wall of the output shaft. The sealing sleeve has a water inlet connected to the water supply passage and an oil inlet and an oil return port connected to the hydraulic oil passage, respectively. 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, an oil inlet channel communicating with the oil inlet, and an oil return channel communicating with the oil return port.

[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 connecting channels that communicate with the water pump, the water inlet, the oil inlet and the oil return port respectively.

[0007] Preferably, 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, the oil inlet and the oil return are respectively arranged between two different and adjacent first sealing parts.

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

[0009] Preferably, 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. The water inlet chamber, the oil inlet chamber and the oil return chamber are respectively arranged between two different and adjacent second sealing parts.

[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. 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 connector is installed on the outer wall of the bearing sleeve and has connection passages that respectively connect the water inlet channel, the oil inlet channel and the oil return channel; A sealing bushing is provided, with the output end of the water supply passage embedded in the accommodating cavity. The sealing bushing is connected to both the output end of the water supply passage and the internal flow channel.

[0012] The second aspect of this utility model provides a tunneling machine, including the cutting reducer with internal spraying function described in any of the above technical solutions.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: In this utility model of a cutting reducer with internal spraying function, the reduction mechanism has an output shaft connected to the cutting head shaft, and a recessed accommodating cavity is formed at the end of the output shaft facing the cutting head shaft; a water pump is installed in the accommodating cavity and has a water supply passage and a hydraulic oil passage, the output end of the water supply passage 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 the sealing sleeve has a water inlet communicating with the water supply passage and an oil inlet and an oil return port communicating with the hydraulic oil passage respectively; a bearing sleeve is fitted on the circumferential outer wall of the sealing sleeve, and the output shaft... Compared to the rotating bearing sleeve, the bearing sleeve is equipped with a water inlet channel connected to the water inlet, an oil inlet channel connected to the oil inlet, and an oil return channel connected to the oil return port. By mounting the water pump on the output shaft of the reduction mechanism, the cutting reducer is able to provide high-pressure water to the internal flow channels on the cutting head shaft. This design is easy to manufacture, compact in structure, and allows for internal spraying functionality to be achieved by replacing a few parts on existing equipment, facilitating standardization of internal spraying. Furthermore, it does not require reducing the structural strength of the cutting head shaft, thus improving the performance and service life of the tunneling machine. In addition, compared to the cutting head shaft, the output shaft on the reduction mechanism is shorter, making it easier to manufacture the accommodating cavity, resulting in less product variation and contributing to structural dimensional standardization, which in turn facilitates the standardization of internal spraying.

[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 this utility model 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 this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0016] Figure 1 A schematic diagram of the structure of a cutting reducer with internal spraying function provided for an embodiment of this utility model; Figure 2 A cross-sectional view of a cutting reducer with internal spraying function provided for an embodiment of this utility model; Figure 3 A schematic diagram of the sealing sleeve in a cutting reducer with internal spray function provided for an embodiment of this utility model; Figure 4 A partial structural diagram of the outer wall of the bearing sleeve in a cutting reducer with internal spray function provided for an embodiment of this utility model; Figure 5 An axial sectional view of the bearing sleeve in a cutting reducer with internal spraying function provided for an embodiment of this utility model; Figure 6 A schematic diagram of the assembly of the output shaft and the cutting head shaft of the cutting reducer with internal spraying function provided for an embodiment of this utility model; Figure 7 A cross-sectional view of the assembly of the output shaft and the cutting head shaft of the cutting reducer with internal spray function provided for an embodiment of this utility model.

[0017] Icons: 10-Cutting head shaft; 11-Internal flow channel; 20-Reduction mechanism; 21-Output shaft; 210-Sealing sleeve; 2100-First sealing part; 2101-Water inlet; 2012-Oil inlet; 2013-Oil return port; 211-Connecting channel; 22-Second bearing; 23-Output bearing seat; 24-Bearing cover; 30-Water pump; 300-Output end; 40-Bearing sleeve; 41-Second sealing part; 401-Water inlet chamber; 402-Water inlet hole; 403-Oil inlet chamber; 404-Oil inlet hole; 405-Oil return chamber; 406-Oil return hole; 50-First bearing; 60-Connecting piece; 61-Connecting pipe; 62-Oil inlet part; 63-Water inlet part; 64-Oil return part; 65-Joint; 70-Sealing bushing; 71-Spacer; 72-Retaining ring; 90-Cylinder body; 100-Splined sleeve. 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 spraying function is provided, which includes a reduction mechanism 20, a water pump 30, and a bearing sleeve 40.

[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 , Figure 2 , Figure 6 and Figure 7 As shown, the reduction mechanism 20 has an output shaft 21 connected to the cutting head shaft 10, so that the output shaft 21 provides power to the cutting head shaft 10. Specifically, the output shaft 21 and the cutting head shaft 10 are fixedly connected by a spline sleeve 100. The spline sleeve 100 is fixed to the output shaft 21 by a fixing pin to prevent the spline sleeve 100 from moving axially. A recessed receiving cavity is formed at the end of the output shaft 21 facing the cutting head shaft 10. The receiving cavity can be formed by the axial upward end of the output shaft 21 being recessed inward.

[0030] like Figure 2 and Figure 7 As shown, the water pump 30 is installed in the accommodating cavity and has a water supply passage and a hydraulic oil passage. An external water source enters the water supply passage, and the water pump 30 pressurizes the water to form high-pressure water. The output end 300 of the water supply passage is connected to the internal flow channel 11 inside the cutting head shaft 10, so that high-pressure water is delivered to the internal flow channel 11. A nozzle is installed at the end of the internal flow channel 11 to realize the spraying of water mist. The hydraulic oil passage provides driving force for the operation of the water pump 30.

[0031] like Figure 2, Figure 3 and Figure 7 As shown, a sealing sleeve 210 is provided on the circumferential outer wall of the output shaft 21. The sealing sleeve 210 has a water inlet 2101 connected to the water supply passage, and an oil inlet 2012 and an oil return port 2013 connected to the hydraulic oil passage, respectively; Figure 4 and Figure 5 As shown, the bearing sleeve 40 is formed into a cylindrical structure and is fitted onto the circumferential outer wall of the sealing sleeve 210. The output shaft 21 rotates relative to the bearing sleeve 40. The bearing sleeve 40 is provided with a water inlet channel communicating with the water inlet 2101, an oil inlet channel communicating with the oil inlet 2012, and an oil return channel communicating with the oil return port 2013. In this way, external water source passes through the bearing sleeve 40 and the sealing sleeve 210 in sequence and enters the water pump 30. Under the drive of the pump, high-pressure water is formed and transported to the internal flow channel 11. Hydraulic oil also passes through the bearing sleeve 40 and the sealing sleeve 210 in sequence. The oil enters the hydraulic oil passage through the sleeve 210, then passes through the sleeve 210 and bearing sleeve 40 to return oil, thus driving the pump. By mounting the water pump 30 on the output shaft 21 of the reduction gear 20, the cutting reducer is able to provide high-pressure water to the internal flow channel 11 on the cutting head shaft 10. This design is easy to manufacture, compact, and allows for internal spraying functionality by replacing a few parts on existing equipment without compromising the structural strength of the cutting head shaft 10, thereby improving the performance and service life of the tunneling machine. Furthermore, compared to the cutting head shaft 10, the output shaft 21 on the reduction gear 20 is shorter, making it easier to manufacture the accommodating cavity, resulting in less product variation and facilitating structural dimensional standardization, which in turn promotes the standardization of internal spraying.

[0032] In a preferred embodiment, such as Figure 2 and Figure 7 As shown, the axis of the water pump 30 is set parallel to the axis of the output shaft 21, or the axis of the water pump 30 coincides with the axis of the output shaft 21. This reduces the weakening of the structural strength of the output shaft 21 by the opening of the accommodating cavity, thereby improving the performance and service life of the reduction mechanism 20.

[0033] In an alternative embodiment, the sealing sleeve 210 and the output shaft 21 are formed as an integral structure.

[0034] To facilitate maintenance and modular assembly, the sealing sleeve 210 and the output shaft 21 are formed as separate structures. In a preferred embodiment, such as... Figure 2 and Figure 3As shown, the sealing sleeve 210 is formed as a cylindrical structure sleeved on the circumferential outer wall of the output shaft 21, and the sealing sleeve 210 is fixedly connected to the output shaft 21, so that the sealing sleeve 210 and the output shaft 21 can rotate synchronously. The output shaft 21 has connecting channels 211 that communicate with the water pump 30 and the water inlet 2101, oil inlet 2012, and oil return port 2013 respectively, so that the water inlet 2101, oil inlet 2012, and oil return port 2013 are respectively connected to the water supply passage and the hydraulic oil passage. The connecting channel 211 can extend radially along the output shaft 21. Furthermore, as... Figure 3 As shown, the sealing sleeve 210 has a spline structure at one end in the axial direction that mates with the output shaft 21, thus achieving circumferential positioning of the sealing sleeve 210 and the output shaft 21. The axial displacement of the sealing sleeve 210 can be limited by the shoulder structure and / or positioning components such as the retaining ring installed on the output shaft 21.

[0035] In a preferred embodiment, the sealing sleeve 210 is a ceramic part or the surface of the sealing sleeve 210 that mates with the second sealing part 41 is provided with a ceramic layer to improve wear resistance and extend service life.

[0036] In this embodiment, as Figure 2 As shown, the circumferential inner wall of the sealing sleeve 210 is provided with a plurality of first sealing portions 2100 arranged axially at intervals. The first sealing portions 2100 and the output shaft 21 adopt a static sealing form. Specifically, the first sealing portion 2100 includes a groove structure opened in the circumferential inner wall of the sealing sleeve 210 and a sealing ring embedded in the groove structure. Part of the sealing ring protrudes outside the groove structure so that it contacts the surface of the output shaft 21. The water inlet 2101, the oil inlet 2012 and the oil return port 2013 are respectively arranged between two different and adjacent first sealing portions 2100, so as to achieve a sealing separation between the water inlet 2101, the oil inlet 2012 and the oil return port 2013.

[0037] like Figure 2 , Figure 4 and Figure 5As shown, the bearing sleeve 40 is formed as a cylindrical structure fitted onto the sealing sleeve 210. The water inlet channel includes a water inlet cavity 401 formed by a recess in the inner wall of the bearing sleeve 40 and a water inlet hole 402 on the outer wall of the bearing sleeve 40 communicating with the water inlet cavity 401. The oil inlet channel includes an oil inlet cavity 403 formed by a recess in the inner wall of the bearing sleeve 40 and an oil inlet hole 404 on the outer wall of the bearing sleeve 40 communicating with the oil inlet cavity 403. The oil return channel includes a recess in the inner wall of the bearing sleeve 40. The formed oil return chamber 405 and the oil return hole 406 opened on the outer wall of the bearing sleeve 40, which connects to the oil return chamber 405, allow water or hydraulic oil to pass through the bearing sleeve 40. The water inlet chamber 401, the oil inlet chamber 403 and the oil return chamber 405 can be formed into an annular structure. The number of water inlet 2101, oil inlet hole 404 and oil return hole 406 that are connected to the water inlet chamber 401, the oil inlet chamber 403 and the oil return chamber 405 respectively can be set to one or more according to actual needs.

[0038] Furthermore, such as Figure 2 As shown, a plurality of second sealing portions 41 are provided on the circumferential inner wall of the bearing sleeve 40, which are arranged at intervals along the axial direction. The second sealing portions 41 are in contact with the surface of the sealing sleeve 210. The second sealing portion 41 includes an annular groove structure opened on the circumferential inner wall of the bearing sleeve 40 and a sealing ring embedded in the annular groove structure. The sealing ring is a rotary seal, and part of the sealing ring protrudes outside the annular groove structure on the bearing sleeve 40 so that it is in contact with the surface of the sealing sleeve 210. The water inlet chamber 401, the oil inlet chamber 403 and the oil return chamber 405 are respectively arranged between two different and adjacent second sealing portions 41, so as to achieve a sealed separation between the water inlet chamber 401, the oil inlet chamber 403 and the oil return chamber 405.

[0039] Furthermore, such as Figure 2 As shown, multiple first bearings 50 are provided between the bearing sleeve 40 and the sealing sleeve 210; at least two first bearings 50 are provided at both ends of all the second sealing parts 41 in the axial direction. The lubrication system in the reduction mechanism 20 supplies lubricating oil to the first bearings 50, that is, the lubricating oil in the reduction mechanism 20 can flow to the first bearings 50 to achieve lubrication of the first bearings 50. In this way, there is no need to set up an additional oil circuit for lubricating the first bearings 50, which makes the structure more reasonable and compact and has fewer failure points.

[0040] In this embodiment, a lubrication channel connecting the first bearing 50 can be opened on the bearing sleeve 40 or the sealing sleeve 210, so that the first bearings 50 on both sides of the second sealing part 41 in the upward direction can be lubricated.

[0041] To facilitate the delivery of oil and water, preferably, the cutting reducer with internal spray function also includes a connector 60 installed on the outer wall of the bearing sleeve 40. The connector 60 can be a block structure fixed on the bearing sleeve 40. The connector 60 has connection passages that connect to the water inlet channel, the oil inlet channel and the oil return channel respectively. The connector 60 is used to connect to the connecting pipe 61 for introducing water or hydraulic oil, or to the connecting pipe 61 for leading out hydraulic oil.

[0042] Specifically, such as Figure 7 As shown, connectors 65 can be installed at both ends of the connecting pipe 61, thus enabling the assembly of the connecting pipe 61 through the connectors 65. Furthermore, as... Figure 6 and Figure 7 As shown, the housing of the deceleration mechanism 20 is provided with an oil inlet 62, a water inlet 63 and an oil return 64. The oil inlet 62, water inlet 63 and oil return 64 can be through holes. A connector 65 can be installed on the side of the oil inlet 62, water inlet 63 and oil return 64 facing the inside of the housing, so as to realize the lead-out of the connecting pipe 61.

[0043] In this embodiment, as Figure 6 and Figure 7 As shown, the reduction mechanism 20 includes a second bearing 22, an output bearing housing 23, and a bearing cover 24. The second bearing 22 is located on the circumferential outer side of the output shaft 21 and axially on the side of the water pump 30 away from the cutting head shaft 10. The output bearing housing 23 is located on the circumferential outer side of the second bearing 22. The bearing cover 24 is fixed on the axial side of the output bearing housing 23 facing the cutting head shaft 10. The bearing sleeve 40 is fixedly connected to the bearing cover 24. In this way, the bearing sleeve 40 can be directly fixed to the reduction mechanism 20 without being fixed to the cylinder 90 of the cantilever section of the cutting part, which has the advantages of compact structure and convenient installation.

[0044] Furthermore, in this embodiment, such as Figure 6 and Figure 7 As shown, the cutting reducer with internal spray function also includes a sealing bushing 70, a retaining ring 72, and a spacer 71. The output end 300 of the water supply passage is embedded in the accommodating cavity. The sealing bushing 70 is connected to both the output end 300 of the water supply passage and the internal flow channel 11, thus meeting the requirements for different installation depths of the water pump 30. The end of the sealing bushing 70 facing the cutting head shaft 10 is embedded inside the cutting head shaft 10, and a sealing ring is fitted on the circumferential side wall of the portion embedded inside the cutting head shaft 10 to achieve a sealed assembly. The spacer 71 is formed into a cylindrical structure and is installed on the side of the water pump 30 facing the cutting head shaft 10, thus fixing the water pump 30 to a deeper position in the accommodating cavity, so that the water pump 30 can correspond to the sealing sleeve 210. The retaining ring 72 is located at the end of the spacer 71 facing away from the water pump 30, and is used to limit the axial displacement of the spacer 71 and the water pump 30.

[0045] According to this utility model, a cutting reducer with internal spray function has a reduction mechanism with an output shaft connected to the cutting head shaft. A recessed accommodating cavity is formed at the end of the output shaft facing the cutting head shaft. A water pump is installed in the accommodating cavity and has a water supply passage and a hydraulic oil passage. The output end of the water supply passage is connected to the internal flow channel inside the cutting head shaft. A sealing sleeve is provided on the circumferential outer wall of the output shaft. The sealing sleeve has a water inlet connected to the water supply passage and an oil inlet and a return oil outlet connected to the hydraulic oil passage, respectively. A bearing sleeve is fitted on the circumferential outer wall of the sealing sleeve. The output shaft rotates relative to the bearing sleeve. The bearing sleeve has a water inlet channel connected to the water inlet, an oil inlet channel connected to the oil inlet, and a return oil outlet. Thus, 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. This design is easy to manufacture, has a compact structure, and can achieve the internal spray function by replacing a few parts in existing equipment without reducing the structural strength of the cutting head shaft, thereby improving performance and service life. In addition, compared with the cutting head shaft, the output shaft on the reduction mechanism is shorter, which is more conducive to the machining of the accommodating cavity, resulting in less product variation and helping to standardize structural dimensions, thereby facilitating the standardization of internal spraying.

[0046] The second aspect of this utility model provides a tunneling machine, including a cutting reducer with an internal spraying function as described above. The structural strength of the cutting head shaft is guaranteed, thereby improving the performance and service life of the tunneling machine, and also facilitating the standardization of internal spraying in the tunneling machine.

[0047] 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 output shaft connected to the cutting head shaft, and a recessed receiving cavity is formed at one end of the output shaft facing the cutting head shaft; A water pump is installed in the accommodating cavity and has a water supply passage and a hydraulic oil passage. The output end of the water supply passage is connected to the internal flow channel inside the cutting head shaft. A sealing sleeve is provided on the circumferential outer wall of the output shaft. The sealing sleeve has a water inlet connected to the water supply passage and an oil inlet and an oil return port connected to the hydraulic oil passage, respectively. 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, an oil inlet channel communicating with the oil inlet, and an oil return channel communicating with the oil return port.

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 connecting channels that communicate with the water pump, the water inlet, the oil inlet and the oil return port 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. The water inlet, the oil inlet and the oil return are respectively arranged between two different and 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. 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 on the outer wall of the bearing sleeve that communicates with the water inlet cavity. The oil inlet channel includes an oil inlet cavity formed by a recess in the inner wall of the bearing sleeve and an oil inlet hole on the outer wall of the bearing sleeve that communicates with the oil inlet cavity. The oil return channel includes an oil return cavity formed by a recess in the inner wall of the bearing sleeve and an oil return hole on the outer wall of the bearing sleeve that communicates with the oil return 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. The water inlet chamber, the oil inlet chamber and the oil return chamber are respectively arranged between two different and 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 of the first bearings are provided at both ends of all the second sealing parts in the axial direction, and the lubrication system in the deceleration mechanism supplies lubricating oil to the first bearings.

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 connector is installed on the outer wall of the bearing sleeve and has connection passages that respectively connect the water inlet channel, the oil inlet channel and the oil return channel; A sealing bushing is provided, wherein the output end of the water supply passage is embedded in the accommodating cavity, and the sealing bushing is connected to the output end of the water supply passage and the internal flow channel respectively.

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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