Cutting speed reducer, cutting part and heading machine

Abstract

The utility model provides a cutting speed reducer, a cutting part and a heading machine, and relates to the technical field of heading machines, the cutting speed reducer comprises a shell, the inner wall of the shell is provided with an inner gear ring; the sun wheel shaft is rotatably arranged on the shell; the planet carrier is arranged in the shell; the planet gears are rotatably arranged on the planet carrier, and the planet gears are meshed with the inner gear ring and the sun gear shaft; the gear shaft is rotatably arranged on the shell and is relatively fixed with the planet carrier in the circumferential direction; the sleeve is arranged on the sun wheel shaft in a penetrating mode, the sleeve and the sun wheel shaft are relatively fixed in the circumferential direction, and the sleeve is provided with an inner spraying channel. In the technical scheme of the utility model, only one group of planetary gear train is adopted in the cutting speed reducer, so that the spatial layout is optimized, the structure is simplified, and the structure is more compact; the inner spraying channel is reserved in the sleeve, so that a working medium in a spraying system can pass through the inner spraying channel, the working medium is sprayed in some application scenes, the dust concentration is reduced, and the environment-friendly requirement is met.

Description

Technical Field

[0001] The utility model relates to the technical field of roadheaders, and more specifically, to a cutting speed reducer, a cutting unit and a roadheader. Background Art

[0002] A roadheader is a very crucial device in coal production or mining. In the related art, the structure of the cutting speed reducer of the roadheader is not compact enough, and there is no reserved internal spray channel, which does not meet the environmental protection requirements. Summary of the Utility Model

[0003] In order to solve or improve at least one of the above technical problems, an object of the utility model is to provide a cutting speed reducer.

[0004] Another object of the utility model is to provide a cutting unit with the above cutting speed reducer.

[0005] Another object of the utility model is to provide a roadheader with the above cutting unit.

[0006] To achieve the above object, the first aspect of the utility model provides a cutting speed reducer, which includes a housing, a sun gear shaft, a planet carrier, a plurality of planet gears, a gear shaft and a sleeve. Among them, an internal gear ring is provided on the inner wall of the housing. The sun gear shaft is rotatably arranged in the housing. The planet carrier is arranged in the housing, and a plurality of planet gears are rotatably arranged on the planet carrier. The planet gears are meshed with the internal gear ring, and the planet gears are meshed with the sun gear shaft. The gear shaft is rotatably arranged in the housing. The gear shaft is circumferentially fixed relative to the planet carrier. The sleeve is arranged through the sun gear shaft, and the sleeve is circumferentially fixed relative to the sun gear shaft. The sleeve is provided with an internal spray channel.

[0007] In the technical solution defined by the utility model, in the first aspect, the sun gear shaft, the internal gear ring, the planet carrier and the plurality of planet gears form a planetary gear train, and only one set of planetary gear train is adopted in the cutting speed reducer. This design method is beneficial to optimizing the spatial layout of the cutting speed reducer, simplifying the structure and making the structure of the cutting speed reducer more compact. It can also reduce the failure points and the failure rate of the cutting speed reducer. In the second aspect, by reserving an internal spray channel in the sleeve of the cutting speed reducer, the working medium in the spray system can pass through, and in some application scenarios, the working medium (such as water) is sprayed to reduce the dust concentration, which meets the environmental protection requirements. In addition, since the internal spray channel is reserved in the sleeve, it is beneficial to further optimize the spatial layout of the cutting speed reducer, simplify the structure and make the structure of the cutting speed reducer more compact.

[0008] In addition, the above technical solution provided by the utility model may also have the following additional technical features:

[0009] In some technical solutions, optionally, the sleeve is also arranged through the gear shaft, and the sleeve can rotate relative to the gear shaft.

[0010] In this technical solution, the sleeve is inserted through both the sun gear shaft and the gear shaft. Since the rotation speed of the sun gear shaft is different from that of the gear shaft, in order to avoid motion interference, the sleeve and the gear shaft can rotate relative to each other.

[0011] This design method is conducive to further optimizing the spatial layout of the cutting reducer, simplifying the structure and making the structure of the cutting reducer more compact.

[0012] In some technical solutions, the cutting reducer may further include at least one first bearing. The first bearing is sleeved on the sleeve and located between the sleeve and the gear shaft. The sleeve and the gear shaft rotate relative to each other through the first bearing.

[0013] In this technical solution, by providing the first bearing, the process of the sleeve rotating relative to the gear shaft can be made smoother.

[0014] The first bearing includes a first inner ring layer, a first ball layer and a first outer ring layer. The first outer ring layer is sleeved on the first inner ring layer, and the first ball layer is arranged between the first outer ring layer and the first inner ring layer. The first outer ring layer and the first inner ring layer are rotationally connected through the first ball layer. The inner wall of the first inner ring layer contacts the circumferential side wall of the sleeve; the outer wall of the first outer ring layer contacts the cavity wall of the first mounting cavity of the gear shaft. Therefore, the sleeve and the gear shaft can achieve relative rotation through the first bearing.

[0015] It should be emphasized that the number of the first bearing is at least one, that is, the first bearing can be one, two or more, and the first bearing can be flexibly arranged according to actual needs.

[0016] Optionally, the first bearing is a ball bearing.

[0017] In some technical solutions, optionally, the gear shaft is provided with a first installation cavity. The sleeve is inserted into the first installation cavity. The cavity wall of the first installation cavity is provided with a placement groove, and the first bearing is arranged in the placement groove. One side of the first bearing abuts against the groove wall of the placement groove. The cutting reducer also includes a limiter. The limiter is sleeved on the sleeve, and the limiter is used to abut against the other side of the first bearing.

[0018] In this technical solution, the first bearing can be axially limited by the cooperation between the limiting member and the groove wall of the placement groove, so that the sleeve can rotate more smoothly relative to the gear shaft.

[0019] In some technical solutions, optionally, the limiting member includes a first sleeve end cover and / or a spring clip.

[0020] In this technical solution, the first sleeve end cover is sleeved on the sleeve, and the first sleeve end cover can abut against one side of the first bearing to axially limit the first bearing.

[0021] The spring clip is sleeved on the sleeve, and the spring clip can abut against one side of the first bearing to axially limit the first bearing.

[0022] In some technical solutions, optionally, the axis of the sun gear shaft, the axis of the gear shaft, and the center line of the sleeve are collinear.

[0023] In this technical solution, this design method, on the one hand, can avoid movement interference; on the other hand, it is beneficial to further optimize the spatial layout of the cutting speed reducer, simplify the structure and make the structure of the cutting speed reducer more compact.

[0024] In some technical solutions, optionally, the cutting speed reducer further includes an output bearing seat and at least one second bearing. The output bearing seat is connected to the housing. The second bearing is sleeved on the gear shaft and is located between the gear shaft and the output bearing seat. The gear shaft and the output bearing seat rotate relative to each other through the second bearing.

[0025] In this technical solution, the gear shaft and the housing are rotationally connected through the output bearing seat and the second bearing. Specifically, the output bearing seat is connected to the housing. The output bearing seat has a second installation cavity, and the second bearing is arranged in the second installation cavity.

[0026] Optionally, the second bearing includes a second inner ring layer, a second ball layer, and a second outer ring layer. The second outer ring layer is sleeved on the second inner ring layer, and the second ball layer is arranged between the second outer ring layer and the second inner ring layer. The second outer ring layer and the second inner ring layer are rotationally connected through the second ball layer. The inner wall of the second inner ring layer contacts the circumferential side wall of the gear shaft; the outer wall of the second outer ring layer contacts the cavity wall of the second installation cavity. Therefore, the gear shaft and the output bearing seat can rotate relative to each other through the second bearing.

[0027] It should be emphasized that the number of the second bearings is at least one, that is, the second bearing can be one, two or more, and the second bearing is flexibly set according to actual needs.

[0028] Optionally, the second bearing is an angular contact ball bearing.

[0029] Optionally, the output bearing seat and the housing are detachably connected, which is convenient for the staff to disassemble and assemble, and is beneficial to maintenance or replacement. Specifically, the output bearing seat and the housing are detachably connected by means of bolts or screws.

[0030] In some technical solutions, optionally, the cutting speed reducer further includes an output bearing end cover. The output bearing end cover is connected to the output bearing seat. The output bearing end cover is used to abut against one side of the second bearing.

[0031] In this technical solution, the output bearing end cover and the output bearing seat cooperate with each other to axially limit the second bearing.

[0032] Optionally, the output bearing end cover and the output bearing seat are detachably connected, which is convenient for staff to disassemble and assemble, and is conducive to maintenance or replacement.

[0033] In some technical solutions, optionally, the cutting reducer further includes an input bearing seat and at least one third bearing. The input bearing seat is connected to the housing. The third bearing is sleeved on the sun gear shaft and located between the sun gear shaft and the input bearing seat. The sun gear shaft and the input bearing seat rotate relative to each other through the third bearing.

[0034] In this technical solution, the sun gear shaft is rotatably connected to the housing through the input bearing seat and the third bearing. Specifically, the input bearing seat is connected to the housing. The input bearing seat has a third mounting cavity, and the third bearing is arranged in the third mounting cavity.

[0035] Optionally, the third bearing includes a third inner ring layer, a third ball layer and a third outer ring layer. The third outer ring layer is sleeved on the third inner ring layer, and the third ball layer is arranged between the third outer ring layer and the third inner ring layer. The third outer ring layer and the third inner ring layer are rotationally connected through the third ball layer. The inner wall of the third inner ring layer contacts the circumferential side wall of the sun gear shaft; the outer wall of the third outer ring layer contacts the cavity wall of the third mounting cavity. Therefore, the sun gear shaft and the input bearing seat can achieve relative rotation through the third bearing.

[0036] It should be emphasized that the number of the third bearing is at least one, that is, the third bearing can be one, two or more, and the third bearing can be flexibly arranged according to actual needs.

[0037] Optionally, the third bearing is an angular contact ball bearing.

[0038] Optionally, the input bearing seat and the housing are detachably connected, which is convenient for staff to disassemble and assemble, and is conducive to maintenance or replacement. Specifically, the input bearing seat and the housing are detachably connected by bolts or screws.

[0039] In some technical solutions, optionally, the cutting reducer further includes an input bearing end cover, which is connected to the input bearing seat, and is used to abut against one side of the third bearing.

[0040] In this technical solution, the input bearing end cover and the input bearing seat cooperate with each other to axially limit the third bearing.

[0041] Optionally, the input bearing end cover and the input bearing seat are detachably connected, which is convenient for staff to disassemble and assemble, and is conducive to maintenance or replacement.

[0042] In some technical solutions, optionally, a tooth structure is provided on the planet carrier, and the gear shaft is meshed with the tooth structure.

[0043] In this technical solution, the gear shaft and the planet carrier are relatively fixed in the circumferential direction. The planet carrier drives the gear shaft to rotate circumferentially. It should be noted that the sun gear shaft is the input shaft of the cutting reducer; the gear shaft is the output shaft of the cutting reducer. The sun gear shaft transmits torque to the gear shaft through the planet gear and the planet carrier in turn.

[0044] The second aspect of the utility model provides a cutting part, comprising a cutting reducer, a cutting motor and a cutting arm in any of the above technical solutions. The cutting motor is connected to the sun gear shaft of the cutting reducer. The cutting arm is connected to the gear shaft of the cutting reducer.

[0045] Among them, since the cutting part includes any cutting reducer in the above-mentioned first aspect, it has the beneficial effects of any of the above-mentioned technical solutions, which will not be repeated here.

[0046] The third aspect of the utility model provides a tunneling machine, comprising a tunneling machine body and a cutting unit in the above technical solution. A cutting motor of the cutting unit is arranged on the tunneling machine body.

[0047] Among them, since the tunnel boring machine includes the cutting part in the above-mentioned second aspect, it has the beneficial effects of any of the above-mentioned technical solutions, which will not be repeated here.

[0048] Additional aspects and advantages of the technical solution of the present invention will become apparent in the following description or will be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Figure 1 A schematic structural diagram of a cutting reducer according to an embodiment of the utility model is shown;

[0050] Figure 2 Shows Figure 1 A partial enlarged schematic diagram of part A;

[0051] Figure 3 Shows Figure 1 A partial enlarged schematic diagram of part B;

[0052] Figure 4 A structural block diagram of a cutting part according to an embodiment of the utility model is shown;

[0053] Figure 5 A structural block diagram of a tunnel boring machine according to an embodiment of the utility model is shown;

[0054] Figure 6 A side view of a gear shaft according to an embodiment of the present invention is shown.

[0055] in, Figures 1 to 6 The corresponding relationship between the reference numerals and the component names is as follows:

[0056] 100: cutting reducer; 110: housing; 111: inner gear ring; 112: cavity; 120: sun gear shaft; 131: planet carrier; 132: tooth structure; 133: planet gear; 140: gear shaft; 141: first installation cavity; 142: placement groove; 150: sleeve; 151: inner spray channel; 161: first bearing; 162: stopper; 1621: first sleeve end cover; 1622: spring Spring clip; 163: fourth bearing; 164: positioning piece; 171: output bearing seat; 172: second mounting cavity; 173: second bearing; 174: output bearing end cover; 181: input bearing seat; 182: third mounting cavity; 183: third bearing; 184: input bearing end cover; 200: cutting part; 210: cutting motor; 220: cutting arm; 300: tunnel boring machine; 310: tunnel boring machine body. DETAILED DESCRIPTION

[0057] In order to more clearly understand the above-mentioned purposes, features and advantages of the embodiments of the present invention, the embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

[0058] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the embodiments of the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0059] Refer to the following Figures 1 to 6 The following describes a cutting reducer 100 , a cutting part 200 , and a tunneling machine 300 provided according to some embodiments of the present invention.

[0060] In one embodiment according to the present invention, Figure 1 As shown, the cutting reducer 100 includes a housing 110, a sun gear shaft 120, a planet carrier 131, a plurality of planetary gears 133, a gear shaft 140 and a sleeve 150. The housing 110 mainly serves as a support and mounting carrier for other components in the cutting reducer 100. An inner gear ring 111 is provided on the inner wall of the housing 110. Optionally, a cavity 112 is provided in the housing 110, and the inner gear ring 111 is provided on the inner wall of the cavity 112.

[0061] It should be noted that the housing 110 and the inner gear ring 111 are an integrated structure, which has good mechanical properties and high connection strength compared to post-processing methods (such as welding), which is conducive to reducing the number of parts and improving assembly efficiency; or, the housing 110 and the inner gear ring 111 are detachably connected, which is convenient for the staff to disassemble and assemble the inner gear ring 111, which is conducive to maintenance or replacement. In addition, the housing 110 can be of any shape and can be flexibly set according to actual needs.

[0062] The sun gear shaft 120 is rotatably disposed on the housing 110, and the sun gear shaft 120 can rotate relative to the housing 110. Optionally, at least a portion of the sun gear passes through the housing 110, that is, at least a portion of the sun gear is disposed in the cavity 112.

[0063] Optionally, the sun gear shaft 120 includes a first shaft body and a sun gear, and the sun gear is sleeved on the first shaft body. The sun gear and the first shaft body are an integrated structure, which has good mechanical properties and high connection strength compared to post-processing methods, and is conducive to reducing the number of parts and improving assembly efficiency.

[0064] Optionally, the sun gear shaft 120 is rotatably connected to the housing 110 via the input bearing seat 181 and the third bearing 183. Specifically, the input bearing seat 181 is connected to the housing 110. The input bearing seat 181 has a third mounting cavity 182, and the third bearing 183 is disposed in the third mounting cavity 182. The third bearing 183 is sleeved on the sun gear shaft 120 and is located between the sun gear shaft 120 and the input bearing seat 181. The sun gear shaft 120 and the input bearing seat 181 rotate relative to each other via the third bearing 183.

[0065] Optionally, the third bearing 183 includes a third inner ring layer, a third ball layer and a third outer ring layer. The third outer ring layer is sleeved on the third inner ring layer, and the third ball layer is arranged between the third outer ring layer and the third inner ring layer. The third outer ring layer and the third inner ring layer are rotationally connected through the third ball layer. The inner wall of the third inner ring layer contacts the circumferential side wall of the sun gear shaft 120; the outer wall of the third outer ring layer contacts the cavity wall of the third mounting cavity 182. Therefore, the sun gear shaft 120 and the input bearing seat 181 can achieve relative rotation through the third bearing 183.

[0066] It should be noted that the number of the third bearing 183 is at least one, that is, the third bearing 183 can be one, two or more, and the third bearing 183 can be flexibly arranged according to actual needs.

[0067] Optionally, the third bearing 183 is an angular contact ball bearing.

[0068] Optionally, the input bearing seat 181 and the housing 110 are detachably connected, which is convenient for staff to disassemble and assemble, and is conducive to maintenance or replacement. Specifically, the input bearing seat 181 and the housing 110 are detachably connected by bolts or screws.

[0069] The planet carrier 131 is disposed in the housing 110. Optionally, the planet carrier 131 is disposed in the cavity 112 of the housing 110. The planetary gear 133 is rotatably disposed on the planet carrier 131, and the planetary gear 133 can rotate relative to the planet carrier 131.

[0070] Optionally, the planet carrier 131 and the planet wheel 133 are rotationally connected through the fourth bearing 163. The fourth bearing 163 is sleeved on the planet carrier 131, and the planet wheel 133 is sleeved on the fourth bearing 163. Specifically, the fourth bearing 163 includes a fourth inner ring layer, a fourth ball layer and a fourth outer ring layer. The fourth outer ring layer is sleeved on the fourth inner ring layer, and the fourth ball layer is arranged between the fourth outer ring layer and the fourth inner ring layer. The fourth outer ring layer and the fourth inner ring layer are rotationally connected through the fourth ball layer. The inner wall of the fourth inner ring layer contacts the circumferential side wall of the planet carrier 131; the outer wall of the fourth outer ring layer contacts the inner wall of the planet wheel 133.

[0071] It should be noted that the number of the fourth bearing 163 is at least one, that is, the fourth bearing 163 can be one, two or more, and the third bearing 183 can be flexibly arranged according to actual needs.

[0072] Optionally, the fourth bearing 163 is a cylindrical bearing.

[0073] The planetary gear 133 meshes with the inner gear ring 111, and the planetary gear 133 meshes with the sun gear shaft 120. When the power shaft of the cutting motor 210 drives the sun gear shaft 120 to rotate, the planetary gear 133 rotates with the sun gear shaft 120, and the planet carrier 131 also rotates with it.

[0074] The gear shaft 140 is rotatably disposed on the housing 110, and the gear shaft 140 can rotate relative to the housing 110. The gear shaft 140 and the planet carrier 131 are relatively fixed in the circumferential direction. Figure 6 The planet carrier 131 drives the gear shaft 140 to rotate in the circumferential direction. It should be noted that the sun gear shaft 120 is the input shaft of the cutting reducer 100; the gear shaft 140 is the output shaft of the cutting reducer 100. The sun gear shaft 120 transmits torque to the gear shaft 140 through the planet gears 133 and the planet carrier 131 in turn.

[0075] Optionally, the planet carrier 131 has a limiting groove. The cutting reducer 100 further includes a positioning member 164. The positioning member 164 is sleeved on the gear shaft 140 and abuts against the groove wall of the limiting groove. The positioning member 164 is used to axially limit the gear shaft 140. Optionally, the positioning member 164 is a clip.

[0076] Optionally, the gear shaft 140 includes a second shaft body and a transmission gear. The transmission gear is sleeved on the second shaft body. The transmission gear and the second shaft body are an integrated structure, which has good mechanical properties and high connection strength compared to the post-processing method, and is conducive to reducing the number of parts and improving assembly efficiency.

[0077] The sleeve 150 is inserted into the sun gear shaft 120. The sleeve 150 and the sun gear shaft 120 are relatively fixed in the circumferential direction. When the power shaft of the cutting motor 210 drives the sun gear shaft 120 to rotate, the sleeve 150 can rotate together with the sun gear shaft 120.

[0078] The sleeve 150 is provided with an inner spray channel 151. By reserving the inner spray channel 151 in the sleeve 150 of the cutting reducer 100, the working medium in the spray system can pass through, and the working medium (such as water) is sprayed in some application scenarios to reduce dust concentration, which meets environmental protection requirements.

[0079] In other words, the interior of the casing 150 is hollow, providing a passage for the spray system of the tunnel boring machine 300 .

[0080] In the technical solution defined in the present utility model, on the first hand, the sun gear shaft 120, the inner gear ring 111, the planet carrier 131 and the plurality of planetary gears 133 form a planetary gear 133 system, and only one set of planetary gears 133 is used in the cutting reducer 100. This design method is conducive to optimizing the spatial layout of the cutting reducer 100, simplifying the structure and making the structure of the cutting reducer 100 more compact, and can also reduce the failure points and reduce the failure rate of the cutting reducer 100; on the second hand, by reserving an internal spray channel 151 in the casing 150 of the cutting reducer 100, the working medium in the spray system can pass through, and the working medium (such as water) can be sprayed in some application scenarios to reduce the dust concentration, which meets environmental protection requirements. In addition, since the internal spray channel 151 is reserved in the casing 150, it is conducive to further optimizing the spatial layout of the cutting reducer 100, simplifying the structure and making the structure of the cutting reducer 100 more compact.

[0081] It should be emphasized that the cutting reducer 100 of the utility model adopts only one set of planetary gears 133 (only one-stage planetary mechanism), which is conducive to simplifying the structure and making the structure of the cutting reducer 100 more compact compared to the technical solution of adopting two or more sets of planetary gears 133, and can also reduce the failure points, reduce the failure rate of the cutting reducer 100, and has a good energy-saving effect. The cutting reducer 100 of the utility model is suitable for a cutting motor 210 with low speed and high torque. By reducing the input speed, it can effectively reduce the failure rate of the cutting reducer 100, reduce the noise and heat of the cutting reducer 100. The cutting reducer 100 of the utility model adopts only one set of planetary gears 133, and can also greatly reduce costs, improve mechanical efficiency, and have higher reliability.

[0082] Optionally, the sun gear shaft 120 is used to connect with the cutting motor 210. The cutting motor 210 has a rotatable power shaft, and the power shaft is connected to the sun gear shaft 120 through a coupling.

[0083] By setting a coupling, on the one hand, a detachable connection between the power shaft and the sun gear shaft 120 can be achieved, which is convenient for the staff to disassemble and assemble, and is conducive to maintenance or replacement; on the other hand, the power shaft can transmit torque to the sun gear shaft 120, that is, the cutting motor 210 can input power to the cutting reducer 100.

[0084] Optionally, the cutting motor 210 is a permanent magnet variable frequency motor.

[0085] It should be noted that permanent magnet variable frequency motor has the following advantages:

[0086] (1) High magnetic energy density: Permanent magnet variable frequency motors use permanent magnets to generate magnetic fields. Permanent magnets have high magnetic energy density, so that permanent magnet variable frequency motors can generate strong magnetic fields with smaller volume and weight.

[0087] (2) Reduced energy loss: Due to the high efficiency of permanent magnets, permanent magnet variable frequency motors require less current to produce the same torque, which reduces copper losses caused by current flow.

[0088] (3) High energy efficiency operation area: The magnetic field strength of the permanent magnet variable frequency motor is relatively constant and will not fluctuate greatly due to changes in the motor load, which is conducive to maintaining a high efficiency.

[0089] (4) Simple structure: Permanent magnet variable frequency motors usually do not require excitation windings. This design method helps to reduce energy losses inside the permanent magnet variable frequency motor and simplify the structure.

[0090] (5) High power density: Due to the high magnetic energy density of permanent magnets, permanent magnet variable frequency motors can achieve high power output in a smaller volume.

[0091] (6) Good heat dissipation performance: Since permanent magnet variable frequency motors have fewer conductive parts and generate less heat, they usually have better heat dissipation performance.

[0092] (7) Reduced maintenance: Permanent magnet variable frequency motors usually require less maintenance due to their simple structure, which helps reduce downtime and improve overall operating efficiency.

[0093] (8) High control accuracy: The use of permanent magnet variable frequency motor can achieve more accurate speed and position control, which is beneficial to improving the overall efficiency of the system.

[0094] (9) Energy feedback: In some application scenarios, permanent magnet variable frequency motors can realize braking energy feedback, further improving the energy efficiency of the system.

[0095] (10) Long-term stability: The magnetic properties of permanent magnet materials are stable, and permanent magnet variable frequency motors can maintain high efficiency during long-term operation.

[0096] In some embodiments, optionally, Figure 1 As shown, the sleeve 150 is also inserted into the gear shaft 140 , and the sleeve 150 and the gear shaft 140 can rotate relative to each other.

[0097] The sleeve 150 is simultaneously passed through the sun gear shaft 120 and the gear shaft 140. Since the rotation speed of the sun gear shaft 120 is different from that of the gear shaft 140, in order to avoid motion interference, the sleeve 150 and the gear shaft 140 can rotate relative to each other.

[0098] This design method is conducive to further optimizing the spatial layout of the cutting reducer 100, simplifying the structure and making the structure of the cutting reducer 100 more compact.

[0099] In some embodiments, optionally, Figure 1 As shown, the cutting reducer 100 further includes at least one first bearing 161. The first bearing 161 is sleeved on the sleeve 150 and is located between the sleeve 150 and the gear shaft 140. The sleeve 150 and the gear shaft 140 rotate relative to each other through the first bearing 161.

[0100] By providing the first bearing 161 , the sleeve 150 can rotate more smoothly relative to the gear shaft 140 .

[0101] The first bearing 161 includes a first inner ring layer, a first ball layer and a first outer ring layer. The first outer ring layer is sleeved on the first inner ring layer, and the first ball layer is arranged between the first outer ring layer and the first inner ring layer. The first outer ring layer and the first inner ring layer are connected in rotation through the first ball layer. The inner wall of the first inner ring layer contacts the circumferential side wall of the sleeve 150; the outer wall of the first outer ring layer contacts the cavity wall of the first mounting cavity 141 of the gear shaft 140. Therefore, the sleeve 150 and the gear shaft 140 can achieve relative rotation through the first bearing 161.

[0102] It should be emphasized that the number of the first bearing 161 is at least one, that is, the first bearing 161 can be one, two, or more, and the first bearing 161 can be flexibly arranged according to actual needs.

[0103] Optionally, the first bearing 161 is a ball bearing.

[0104] In some embodiments, optionally, Figure 1 , Figure 2 and Figure 3 As shown, the gear shaft 140 is provided with a first installation cavity 141. The sleeve 150 is inserted into the first installation cavity 141. The cavity wall of the first installation cavity 141 is provided with a placement groove 142, and the first bearing 161 is arranged in the placement groove 142. One side of the first bearing 161 abuts against the groove wall of the placement groove 142.

[0105] The cutting reducer 100 further includes a stopper 162 . The stopper 162 is sleeved on the sleeve 150 , and is used to abut against the other side of the first bearing 161 .

[0106] By the cooperation between the limiting member 162 and the groove wall of the placement groove 142 , the first bearing 161 can be axially limited, so that the sleeve 150 can rotate relative to the gear shaft 140 more smoothly.

[0107] In some embodiments, optionally, Figure 2 As shown, the limiting member 162 includes a first sleeve end cover 1621 .

[0108] The first sleeve end cover 1621 is sleeved on the sleeve 150 , and the first sleeve end cover 1621 can abut against one side of the first bearing 161 to axially limit the first bearing 161 .

[0109] In some embodiments, optionally, Figure 3 As shown, the limiting member 162 includes a spring clip 1622 .

[0110] The spring clip 1622 is sleeved on the sleeve 150 , and the spring clip 1622 can abut against one side of the first bearing 161 to limit the axial position of the first bearing 161 .

[0111] In some embodiments, optionally, the axis of the sun gear shaft 120 , the axis of the gear shaft 140 , and the centerline of the sleeve 150 are collinear.

[0112] This design approach, on the one hand, can avoid motion interference; on the other hand, it is conducive to further optimizing the spatial layout of the cutting reducer 100, simplifying the structure and making the structure of the cutting reducer 100 more compact.

[0113] In some embodiments, optionally, Figure 1 As shown, the cutting reducer 100 further includes an output bearing seat 171 and at least one second bearing 173. The output bearing seat 171 is connected to the housing 110. The second bearing 173 is sleeved on the gear shaft 140 and is located between the gear shaft 140 and the output bearing seat 171. The gear shaft 140 and the output bearing seat 171 rotate relative to each other through the second bearing 173.

[0114] The gear shaft 140 is rotatably connected to the housing 110 via the output bearing seat 171 and the second bearing 173. Specifically, the output bearing seat 171 is connected to the housing 110. The output bearing seat 171 has a second installation cavity 172, and the second bearing 173 is disposed in the second installation cavity 172.

[0115] Optionally, the second bearing 173 includes a second inner ring layer, a second ball layer and a second outer ring layer. The second outer ring layer is sleeved on the second inner ring layer, and the second ball layer is arranged between the second outer ring layer and the second inner ring layer. The second outer ring layer and the second inner ring layer are rotationally connected through the second ball layer. The inner wall of the second inner ring layer contacts the circumferential side wall of the gear shaft 140; the outer wall of the second outer ring layer contacts the cavity wall of the second mounting cavity 172. Therefore, the gear shaft 140 and the output bearing seat 171 can achieve relative rotation through the second bearing 173.

[0116] It should be emphasized that the number of the second bearing 173 is at least one, that is, the second bearing 173 can be one, two, or more, and the second bearing 173 can be flexibly arranged according to actual needs.

[0117] Optionally, the second bearing 173 is an angular contact ball bearing.

[0118] Optionally, the output bearing seat 171 is detachably connected to the housing 110, which is convenient for staff to disassemble and assemble, and is conducive to maintenance or replacement. Specifically, the output bearing seat 171 is detachably connected to the housing 110 by bolts or screws.

[0119] In some embodiments, optionally, Figure 1 As shown, the cutting reducer 100 further includes an output bearing end cover 174. The output bearing end cover 174 is connected to the output bearing seat 171. The output bearing end cover 174 is used to abut against one side of the second bearing 173.

[0120] The output bearing end cover 174 cooperates with the output bearing seat 171 to limit the axial position of the second bearing 173 .

[0121] Optionally, the output bearing end cover 174 and the output bearing seat 171 are detachably connected, which is convenient for staff to disassemble and assemble, and is conducive to maintenance or replacement.

[0122] In some embodiments, optionally, Figure 1 As shown, the cutting reducer 100 further includes an input bearing seat 181 and at least one third bearing 183. The input bearing seat 181 is connected to the housing 110. The third bearing 183 is sleeved on the sun gear shaft 120 and is located between the sun gear shaft 120 and the input bearing seat 181. The sun gear shaft 120 and the input bearing seat 181 rotate relative to each other through the third bearing 183.

[0123] The sun gear shaft 120 is rotatably connected to the housing 110 via the input bearing seat 181 and the third bearing 183. Specifically, the input bearing seat 181 is connected to the housing 110. The input bearing seat 181 has a third installation cavity 182, and the third bearing 183 is disposed in the third installation cavity 182.

[0124] Optionally, the third bearing 183 includes a third inner ring layer, a third ball layer and a third outer ring layer. The third outer ring layer is sleeved on the third inner ring layer, and the third ball layer is arranged between the third outer ring layer and the third inner ring layer. The third outer ring layer and the third inner ring layer are rotationally connected through the third ball layer. The inner wall of the third inner ring layer contacts the circumferential side wall of the sun gear shaft 120; the outer wall of the third outer ring layer contacts the cavity wall of the third mounting cavity 182. Therefore, the sun gear shaft 120 and the input bearing seat 181 can achieve relative rotation through the third bearing 183.

[0125] It should be emphasized that the number of the third bearing 183 is at least one, that is, the third bearing 183 can be one, two or more, and the third bearing 183 can be flexibly arranged according to actual needs.

[0126] Optionally, the third bearing 183 is an angular contact ball bearing.

[0127] Optionally, the input bearing seat 181 and the housing 110 are detachably connected, which is convenient for staff to disassemble and assemble, and is conducive to maintenance or replacement. Specifically, the input bearing seat 181 and the housing 110 are detachably connected by bolts or screws.

[0128] In some embodiments, optionally, Figure 1As shown, the cutting reducer 100 further includes an input bearing end cover 184. The input bearing end cover 184 is connected to the input bearing seat 181. The input bearing end cover 184 is used to abut against one side of the third bearing 183.

[0129] The input bearing end cover 184 cooperates with the input bearing seat 181 to limit the axial position of the third bearing 183 .

[0130] Optionally, the input bearing end cover 184 and the input bearing seat 181 are detachably connected, which is convenient for staff to disassemble and assemble, and is conducive to maintenance or replacement.

[0131] In some embodiments, optionally, Figure 1 As shown, a tooth structure 132 is provided on the planet carrier 131 , and the gear shaft 140 is meshed with the tooth structure 132 .

[0132] The gear shaft 140 is relatively fixed to the planet carrier 131 in the circumferential direction. The planet carrier 131 drives the gear shaft 140 to rotate in the circumferential direction. It should be noted that the sun gear shaft 120 is the input shaft of the cutting reducer 100; the gear shaft 140 is the output shaft of the cutting reducer 100. The sun gear shaft 120 transmits torque to the gear shaft 140 through the planet gears 133 and the planet carrier 131 in turn.

[0133] In one embodiment according to the present invention, Figure 4 As shown, the cutting part 200 includes the cutting reducer 100 in any of the above embodiments, a cutting motor 210 and a cutting arm 220. The cutting motor 210 is connected to the sun gear shaft 120 of the cutting reducer 100. The cutting arm 220 is connected to the gear shaft 140 of the cutting reducer 100.

[0134] Optionally, the cutting motor 210 has a rotatable power shaft, and the power shaft is connected to the sun gear shaft 120 via a coupling.

[0135] By setting a coupling, on the one hand, a detachable connection between the power shaft and the sun gear shaft 120 can be achieved, which is convenient for the staff to disassemble and assemble, and is conducive to maintenance or replacement; on the other hand, the power shaft can transmit torque to the sun gear shaft 120, that is, the cutting motor 210 can input power to the cutting reducer 100.

[0136] Optionally, the cutting arm 220 is a telescopic arm, and a cutting head is provided at the other end of the telescopic arm.

[0137] Optionally, the cutting motor 210 is a permanent magnet variable frequency motor.

[0138] It should be noted that permanent magnet variable frequency motor has the following advantages:

[0139] (1) High magnetic energy density: Permanent magnet variable frequency motors use permanent magnets to generate magnetic fields. Permanent magnets have high magnetic energy density, so that permanent magnet variable frequency motors can generate strong magnetic fields with smaller volume and weight.

[0140] (2) Reduced energy loss: Due to the high efficiency of permanent magnets, permanent magnet variable frequency motors require less current to produce the same torque, which reduces copper losses caused by current flow.

[0141] (3) High energy efficiency operation area: The magnetic field strength of the permanent magnet variable frequency motor is relatively constant and will not fluctuate greatly due to changes in the motor load, which is conducive to maintaining a high efficiency.

[0142] (4) Simple structure: Permanent magnet variable frequency motors usually do not require excitation windings. This design method helps to reduce energy losses inside the permanent magnet variable frequency motor and simplify the structure.

[0143] (5) High power density: Due to the high magnetic energy density of permanent magnets, permanent magnet variable frequency motors can achieve high power output in a smaller volume.

[0144] (6) Good heat dissipation performance: Since permanent magnet variable frequency motors have fewer conductive parts and generate less heat, they usually have better heat dissipation performance.

[0145] (7) Reduced maintenance: Permanent magnet variable frequency motors usually require less maintenance due to their simple structure, which helps reduce downtime and improve overall operating efficiency.

[0146] (8) High control accuracy: The use of permanent magnet variable frequency motor can achieve more accurate speed and position control, which is beneficial to improving the overall efficiency of the system.

[0147] (9) Energy feedback: In some application scenarios, permanent magnet variable frequency motors can realize braking energy feedback, further improving the energy efficiency of the system.

[0148] (10) Long-term stability: The magnetic properties of permanent magnet materials are stable, and permanent magnet variable frequency motors can maintain high efficiency during long-term operation.

[0149] In one embodiment according to the present invention, Figure 5 As shown, the boring machine 300 includes a boring machine body 310 and the cutting unit 200 in the above embodiment. The cutting motor 210 of the cutting unit 200 is arranged on the boring machine body 310.

[0150] Optionally, the cutting part 200 further includes a motor housing, which is detachably connected to the tunnel boring machine body 310. The cutting motor 210 is disposed in the motor housing and is connected to the tunnel boring machine body 310 through the motor housing.

[0151] In the present invention, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance; the term "plurality" refers to two or more, unless otherwise clearly defined. The terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0152] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by terms such as "up", "down", "left", "right", "front" and "back" are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation, and therefore, cannot be understood as a limitation on the present invention.

[0153] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0154] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A cutting reducer, characterized in that: include: A housing (110), wherein an inner wall of the housing (110) is provided with an inner gear ring (111); A sun gear shaft (120) rotatably disposed on the housing (110); A planet carrier (131) is disposed in the housing (110); A plurality of planetary gears (133) are rotatably disposed on the planetary carrier (131), the planetary gears (133) are meshed with the inner gear ring (111), and the planetary gears (133) are meshed with the sun gear shaft (120); A gear shaft (140) is rotatably disposed on the housing (110), and the gear shaft (140) and the planet carrier (131) are relatively fixed in the circumferential direction; A sleeve (150) is inserted through the sun gear shaft (120); the sleeve (150) and the sun gear shaft (120) are relatively fixed in the circumferential direction; and the sleeve (150) is provided with an inner spray channel (151).

2. The cutting reducer according to claim 1, characterized in that: The sleeve (150) is also inserted into the gear shaft (140), and the sleeve (150) and the gear shaft (140) are capable of relative rotation.

3. The cutting reducer according to claim 2, characterized in that: Also includes: At least one first bearing (161), wherein the first bearing (161) is sleeved on the sleeve (150) and located between the sleeve (150) and the gear shaft (140), and the sleeve (150) and the gear shaft (140) rotate relative to each other through the first bearing (161).

4. The cutting reducer according to claim 3, characterized in that: The gear shaft (140) is provided with a first installation cavity (141), the sleeve (150) is inserted into the first installation cavity (141), the cavity wall of the first installation cavity (141) is provided with a placement groove (142), the first bearing (161) is arranged in the placement groove (142), and one side of the first bearing (161) abuts against the groove wall of the placement groove (142); The cutting reducer also includes: A limiting member (162) is sleeved on the sleeve (150), and the limiting member (162) is used to abut against the other side of the first bearing (161).

5. The cutting reducer according to claim 4, characterized in that: The limiting member (162) includes a first sleeve end cover (1621) and / or a spring clip (1622).

6. The cutting reducer according to claim 2, characterized in that: The axis of the sun gear shaft (120), the axis of the gear shaft (140) and the center line of the sleeve (150) are collinear.

7. The cutting reducer according to any one of claims 1 to 6, characterized in that: Also includes: An output bearing seat (171) connected to the housing (110); At least one second bearing (173), the second bearing (173) being sleeved on the gear shaft (140) and located between the gear shaft (140) and the output bearing seat (171), and the gear shaft (140) and the output bearing seat (171) are relatively rotated via the second bearing (173).

8. The cutting reducer according to claim 7, characterized in that: Also includes: An output bearing end cover (174) is connected to the output bearing seat (171), and the output bearing end cover (174) is used to abut against one side of the second bearing (173).

9. The cutting reducer according to any one of claims 1 to 6, characterized in that: Also includes: An input bearing seat (181) connected to the housing (110); At least one third bearing (183), the third bearing (183) is sleeved on the sun gear shaft (120) and is located between the sun gear shaft (120) and the input bearing seat (181), and the sun gear shaft (120) and the input bearing seat (181) rotate relative to each other through the third bearing (183).

10. The cutting reducer according to claim 9, characterized in that: Also includes: An input bearing end cover (184) is connected to the input bearing seat (181), and the input bearing end cover (184) is used to abut against one side of the third bearing (183).

11. The cutting reducer according to any one of claims 1 to 6, characterized in that: The planet carrier (131) is provided with a tooth structure (132), and the gear shaft (140) is meshed with the tooth structure (132).

12. A cutting portion, characterized in that: include: A cutting reducer as claimed in any one of claims 1 to 11; A cutting motor (210) connected to the sun gear shaft (120) of the cutting reducer; The cutting arm (220) is connected to the gear shaft (140) of the cutting reducer.

13. A tunnel boring machine, characterized in that: include: Tunnel boring machine body (310) ； The cutting part according to claim 12, wherein the cutting motor (210) of the cutting part is arranged on the tunnel boring machine body (310).

Images