CN113236718A - Cutting speed reducer, cutting part and heading machine - Google Patents

Abstract

The invention discloses a cutting speed reducer, a cutting part and a heading machine, wherein the cutting speed reducer comprises a shell, a planetary speed reducing mechanism, a primary speed reducing part, a secondary speed reducing part and a rotary watertight sealing device, the planetary speed reducing mechanism, the primary speed reducing part and the secondary speed reducing part are all arranged in the shell, the primary speed reducing part is in transmission connection with the planetary speed reducing mechanism, the secondary speed reducing part is in transmission connection with the primary speed reducing part, the side wall of the shell is concavely arranged towards the inner side of the shell to form a supporting frame, the supporting frame is enclosed to form an accommodating space isolated from the inner side of the shell, and the rotary watertight sealing device is arranged in the accommodating space. In the cutting speed reducer, the cutting part and the heading machine, the rotary water sealing device is arranged at the shell and is positioned in the accommodating space isolated from the interior of the shell, so that the rotary water sealing device is convenient to assemble and disassemble integrally, water can be prevented from leaking in the speed reducer and the cantilever section when the rotary water sealing device leaks, other elements are prevented from being damaged, and the rotary water sealing device is easy to find when damaged.

Description

Cutting speed reducer, cutting part and heading machine

Technical Field

The invention relates to the technical field of underground tunneling equipment, in particular to a cutting speed reducer, a cutting part and a tunneling machine.

Background

The development machine is a comprehensive equipment which uses machinery to break rock, produce slag and support to implement continuous operation. With the rapid development of national economy, the urbanization process of China is accelerated continuously, and in a quite long period in future, tunnel projects such as domestic urban subway tunnels, hydraulic tunnels, river-crossing tunnels, railway tunnels, highway tunnels, municipal pipelines and the like are developed vigorously, so that a large number of tunnel boring machines can be applied. In addition, a heading machine is also required in coal mining.

The cutting part is a working part of the heading machine and comprises a cutting speed reducer 91, a cantilever section 93 and a cutting head 94, and the cutting part has the functions of cutting rocks and removing dust by internal spraying. Referring to fig. 1, a cutting speed reducer is composed of two planetary speed reducing mechanisms, i.e., a first planetary speed reducing mechanism 912 and a second planetary speed reducing mechanism 914. Because the central shaft rotating speeds of the first-stage planetary reducing mechanism 912 and the second-stage planetary reducing mechanism 914 are different, a water channel cannot be arranged, the water channel is intelligently arranged in the cantilever section 93, namely, the water channel is connected into the cantilever section 93 through the water inlet joint 95, and then the water channel is introduced into the rotary water sealing device 97, and water is introduced into the cutting spindle 99 to reach the cutting head 94 to be sprayed out to form water mist which is used as internal spraying dust suppression.

However, in the cutting part, because the rotation speeds of the central shaft of the first-stage planetary reduction mechanism 912 and the central shaft of the second-stage planetary reduction mechanism 914 are different, the rotating water sealing device 97 must be installed in the cantilever section 93, and during installation, the main shaft needs to be transversely pushed into the side surface of the cantilever section 93, so that the installation is difficult, and the installation into an accurate position is difficult, and the rotating water sealing device 97 is a quick-wear part with short service time, needs to be frequently maintained, and can be replaced after the whole cantilever section 93 is disassembled, so that the replacement is difficult; the damage of the rotating water sealing device 97 can cause water leakage, accumulated water can be left in the cantilever section 93 and is not easy to be found, and the internal structure of the cantilever section 93 is damaged.

Disclosure of Invention

The invention aims to provide a cutting speed reducer, a cutting part and a heading machine which are convenient to disassemble, assemble and maintain and easy to find out damage of parts.

The invention provides a cutting speed reducer which comprises a shell, a planetary speed reducing mechanism, a primary speed reducing part, a secondary speed reducing part and a rotary water sealing device, wherein the planetary speed reducing mechanism, the primary speed reducing part and the secondary speed reducing part are all arranged inside the shell, the primary speed reducing part is in transmission connection with the planetary speed reducing mechanism, the secondary speed reducing part is in transmission connection with the primary speed reducing part, the side wall of the shell is concavely arranged towards the inner side of the shell to form a supporting frame, the supporting frame encloses an accommodating space isolated from the inside of the shell, and the rotary water sealing device is arranged in the accommodating space.

In one embodiment, the housing is provided with an opening communicated with the accommodating space.

In one embodiment, the axis of the secondary speed reducer and the axis of the planetary speed reduction mechanism are located on the same straight line, the axis of the primary speed reducer is offset from the axis of the secondary speed reducer and the axis of the planetary speed reduction mechanism, and the rotary water sealing device is connected to the secondary speed reducer.

In one embodiment, the planetary reduction mechanism comprises a planetary output member, a first gear and a second gear which are relatively fixed are arranged on the first-stage reduction member, a third gear and a reducer output shaft are arranged on the second-stage reduction member, the first gear is in transmission connection with the planetary output member of the planetary reduction mechanism, and the third gear is in transmission connection with the second gear; the axes of the input shaft, the planetary output element, the third gear and the output shaft of the speed reducer are positioned on the same straight line, the axes of the first gear and the second gear are parallel to the axes of the input shaft, the planetary output element and the output shaft of the speed reducer at intervals, and the rotating water sealing device is positioned on the straight line where the axes of the input shaft, the planetary output element, the third gear and the output shaft of the speed reducer are positioned.

In one embodiment, the primary speed reducer includes two first gears and two second gears, each of the first gears and one of the second gears are connected by a connecting portion, the two first gears are respectively engaged with the external teeth of the planetary output member, the two second gears are respectively engaged with the third gear, a cavity is formed between the two connecting portions, and the holder is located in the cavity.

In one embodiment, a matching portion is arranged in the casing, an inner gear ring is arranged on the inner side of the matching portion, the planetary reduction mechanism further comprises an input shaft, a planetary wheel and a planetary carrier, a sun wheel is arranged on the input shaft, the planetary wheel is rotatably arranged on the planetary carrier, external teeth of the planetary wheel are meshed with external teeth of the sun wheel, the external teeth of the planetary wheel are further meshed with the inner gear ring on the casing, and the planetary output member is fixedly connected to the planetary carrier.

In one embodiment, the second-stage reduction gear further comprises an extension shaft, the extension shaft extends into the accommodating space, the rotating water sealing device is arranged at the end of the extension shaft, a first water channel is further arranged in the second-stage reduction gear, and the rotating water sealing device is communicated with the first water channel.

The invention also provides a cutting part which comprises the cutting speed reducer, a cantilever section, a cutting spindle and a cutting head, wherein the cantilever section is fixedly connected to the shell of the cutting speed reducer, the cutting spindle is positioned in the cantilever section and extends into the cutting head, the cutting spindle is fixedly connected to the second-stage speed reducer, a second water channel is formed in the cutting spindle, and the second water channel is communicated with the rotary water sealing device.

In one embodiment, the cutting part further includes a connecting cylinder, and the connecting cylinder is respectively connected to the cutting spindle and the secondary speed reducer.

The invention also provides a heading machine which comprises the cutting part.

In the cutting speed reducer, the cutting part and the heading machine, the rotary water sealing device is arranged at the shell and is positioned in the accommodating space isolated from the interior of the shell, compared with the condition that the rotary water sealing device is arranged in the cantilever section of the cutting part, the rotary water sealing device is easier to install and can be installed in the correct size, the rotary water sealing device is more convenient to replace in small spaces such as tunnels, the disassembly and the assembly are convenient in the whole, meanwhile, the water can be prevented from leaking in the speed reducer and the cantilever section when the rotary water sealing device leaks, the damage of other elements is avoided, and the rotary water sealing device is easier to find when damaged.

Drawings

Fig. 1 is a schematic cross-sectional view of a cutting unit.

Fig. 2 is a schematic cross-sectional view of a cutting speed reducer according to an embodiment of the present invention.

Fig. 3 is a schematic plan view of elements of the cutting speed reducer shown in fig. 2.

Fig. 4 is a schematic cross-sectional view of a cutting unit according to an embodiment of the invention.

Fig. 5 is a partial enlarged view of V in fig. 4.

Detailed Description

To further illustrate the technical means and effects of the present invention adopted to achieve the predetermined objects, the following detailed description of the embodiments, structures, features and effects of the present invention will be made with reference to the accompanying drawings and examples.

As shown in fig. 2 and 3, the cutting speed reducer according to an embodiment of the present invention includes a housing 11, a planetary speed reducing mechanism 13, a primary speed reducing member 15, a secondary speed reducing member 17, and a rotary water sealing device 19. The planetary reduction mechanism 13, the primary reduction gear 15, and the secondary reduction gear 17 are provided in the housing 11. The primary speed reducer 15 is connected with the planetary speed reducing mechanism 13 in a transmission mode, the secondary speed reducer 17 is connected with the primary speed reducer 15 in a transmission mode, the axis of the secondary speed reducer 17 is located on the same line with the axis of the planetary speed reducing mechanism 13, and the axis of the primary speed reducer 15 is deviated from the axis of the secondary speed reducer 17 and the axis of the planetary speed reducing mechanism 13. The rotary water seal device 19 is connected to the secondary speed reducer 17, and the rotary water seal device 19 is located between the secondary speed reducer 17 and the planetary reduction mechanism 13 in the axial direction of the secondary speed reducer 15.

Specifically, the planetary reduction mechanism 13 includes the planetary output member 132, the first reduction gear 15 is provided with a first gear 152 and a second gear 154 that are relatively fixed, and the second reduction gear 17 is provided with a third gear 172 and a reducer output shaft 174. The first gear 152 is drivingly connected to the planetary output member 132 of the planetary reduction mechanism 13, and the third gear 172 is drivingly connected to the second gear 154.

In this embodiment, a fitting portion 112 is provided in the housing 11, and an inner ring gear 114 is provided on an inner side of the fitting portion 112. Two opposite side walls of the housing 11 are provided with openings 116 (see fig. 3) corresponding to the positions of the rotary water seal 19 to expose the rotary water seal 19. Therefore, the rotary water sealing device can be conveniently disassembled and assembled, whether the rotary water sealing device leaks or not can be observed, and the external water pipe can be conveniently led into the cutting speed reducer. It will be appreciated that the aperture 116 may be provided in only one side wall of the housing 11.

Specifically, one end of the housing 11 is fixedly connected with an end cover 118, the planetary reduction mechanism 13 is arranged at the end of the housing 11 where the end cover 118 is arranged, and a part of the planetary reduction mechanism 13 extends out of the housing 11 from an opening of the end cover 118 to transmit external power into the cutting speed reducer. The other end of the housing 11, at which the end cap 118 is provided, is provided with a port from which the reducer output shaft 174 extends out of the housing 11 to transmit power to the cutting head of the cutting section.

Specifically, the housing 11 is formed by fastening an upper portion and a lower portion, and in order to display the components inside the housing 11, only the lower portion of the housing 11 is shown in fig. 3, and the upper portion is removed.

In the present embodiment, the planetary reduction mechanism 13 further includes an input shaft 134, a planetary gear 135, and a planetary carrier 136. The input shaft 134 is adapted to be connected to a motor (not shown) to input power to the cutting reducer. The input shaft 134 is provided with a sun gear 137, the planetary gear 135 is rotatably provided on a planet carrier 136, external teeth of the planetary gear 135 are engaged with external teeth of the sun gear 137, and the external teeth of the planetary gear 135 are also engaged with the internal gear 114 on the housing 11. The planet output member 132 is fixedly connected to a planet carrier 136. The input shaft 134 is driven by the motor to rotate, thereby driving the planet wheel 135, the planet carrier 136 and the planet output member 132 to rotate.

Specifically, a support 119 is fixed to the inner side of the end cover 118, and a first bearing 121 is sleeved between the support 119 and the input shaft 134. A sealing plate 123 is fixedly connected to the outer side of the supporting member 119.

Specifically, the end surface of the carrier 136 protrudes toward one side to form a protruding shaft portion 1362, and a shaft hole is formed in the protruding shaft portion 1362. The planetary output member 132 is fitted in the shaft hole of the protruding shaft portion 1362.

Specifically, the planetary output member 132 is provided with external teeth.

In the present embodiment, the one-stage speed reducer 15 includes two first gears 152 and two second gears 154, and one first gear 152 and one second gear 154 are connected by a connecting portion 156. The two first gears 152 are respectively meshed with external teeth of the planetary output member 132, and the two second gears 154 are respectively meshed with the third gear 172. A cavity 158 is formed between the two connecting portions 156, and the rotary water seal 19 is disposed in the cavity 158. The two groups of gears are respectively positioned at two sides of the cutting speed reducer, so that the sectional area of the cutting speed reducer is increased, and the impact resistance of the cutting speed reducer can be increased. It is understood that the first gear 152 and the second gear 154 may be only one. When only one first gear 152 and one second gear 154 are arranged, a balance structure can be arranged on one side opposite to the first gear 152 and the second gear 154, so that the balance of the cutting speed reducer can be ensured, and the sectional area of the cutting speed reducer can be increased.

In this embodiment, the secondary speed reducer 17 further includes an extension shaft 176, the extension shaft 176 extends in a direction opposite to the speed reducer output shaft 174, the extension shaft 176 extends into the cavity 158, and the rotary water sealing device 19 is provided at an end of the extension shaft 176. The second reduction gear 17 is also provided with a first water passage 179 therein, and the rotary water seal 19 is communicated with the first water passage 179.

Specifically, a key groove 181 is provided on a portion of the reducer output shaft 174 of the secondary speed reducer 17 protruding out of the housing 11.

In this embodiment, the axes of the input shaft 134, the planetary output member 132, the third gear 172 and the reducer output shaft 174 are located on the same straight line, and the axes of the first gear 152 and the second gear 154 are spaced apart and parallel to the axes of the input shaft 134, the planetary output member 132 and the reducer output shaft 174. The rotary water seal device 19 is located on a straight line on which the axes of the input shaft 134, the planetary output member 132, the third gear 172, and the reducer output shaft 174 are located.

In this embodiment, the housing 11 further includes a support frame 125 extending into the cavity 158 formed by the first reduction gear 15, the support frame 125 is formed by recessing the sidewall of the housing 11 toward the inner side of the housing 11, and one end of the extension shaft 175 extends into the receiving space to connect with the rotating water sealing device 19 in the receiving space. The holder 125 defines a receiving space which communicates with the outside of the housing 11 through the opening 116 and is isolated from the other portions of the housing 11, and the rotary water seal device 19 is located in the receiving space. Thereby, the rotary water seal 19 can be exposed to the outside of the housing 11, and the lubricating oil can be surely stored in the cutting speed reducer without leaking. The housing 11 is formed with a passage extending through opposite sides of the housing 11 at the center thereof by providing the receiving space and the opening 116, and the passage is isolated from the inside of the housing 11 by the holder 125.

Specifically, a second bearing 126 is sleeved between the planet output member 132 and the support frame 125. A third bearing 127 is interposed between the casing 11 and the connecting portion 156 of the primary speed reducer 15. The fourth bearing 128 is fitted between the extension shaft 176 of the secondary reduction gear 17 and the holder 125 of the housing 11. A fifth bearing 129 is sleeved between the reducer output shaft 174 of the secondary speed reducer 17 and the housing 11.

It will be appreciated that in another embodiment, the motor may also be connected to the secondary reduction member 17, while the output shaft of the planetary reduction mechanism 13 is used as the output shaft of the cutting speed reducer, i.e. the positions of the secondary reduction member 17 and the planetary reduction mechanism 13 are interchanged.

In the cutting speed reducer of one embodiment of the invention, the rotary water sealing device is arranged at the shell and is positioned in the accommodating space isolated from the inside of the shell, compared with the situation that the rotary water sealing device is arranged in the cantilever section of the cutting part, the rotary water sealing device is easier to install and can be installed in the correct size, the rotary water sealing device is more convenient to replace in small spaces such as tunnels, the disassembly and the assembly are convenient overall, meanwhile, the water leakage in the speed reducer and the cantilever section when the rotary water sealing device leaks can be avoided, the damage of other elements is avoided, and the rotary water sealing device is easier to find when damaged.

Referring to fig. 4 and 5, the cutting unit of an embodiment of the present invention includes the cutting speed reducer, the cantilever section 31, the cutting spindle 33, and the cutting head 35. The boom section 31 is fixedly connected to the housing 11 of the cutting reducer. The cutting spindle 33 is located in the cantilever section 31 and extends into the cutting head 35, the cutting spindle 33 is fixedly connected to the reducer output shaft 174 of the second-stage speed reducer 17, a second water channel 332 is formed in the cutting spindle 33, and the second water channel 332 is communicated with the rotary water sealing device 19 through the first water channel 179 so as to introduce water into the cutting head 35 to realize internal spraying. Wherein, the cutting spindle 33, the reducer output shaft 174 and the cutting head 35 have the same rotating speed, and the matching surface of the water channel is sealed by static seals such as O-shaped sealing rings.

Specifically, one end of the cantilever section 31 is provided with a flange 312, and the flange 312 is connected to the outer wall of the housing 11 by bolts.

In particular, the inner wall of the cantilever section 31 is provided with a support ring 314 to provide support for the cutting spindle 33. More specifically, a sleeve 334 is fixed on the cutting spindle 33, the supporting ring 314 is sleeved outside the cutting spindle 33, and a sealing ring 316 is arranged between the supporting ring 314 and the sleeve 334.

In this embodiment, the cutting unit further includes a connecting cylinder 37, and the connecting cylinder 37 is connected to the cutting spindle 33 and the reducer output shaft 374 respectively. The connecting cylinder 37 and the reducer output shaft 374 can be fixedly connected by a spline.

In this embodiment, the cutting head 35 is provided with cutting teeth to cut rocks and the like.

The invention also provides a heading machine which comprises the cutting part.

Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (10)

1. The utility model provides a cutting speed reducer, characterized in that, cutting speed reducer includes casing (11), planetary reduction mechanism (13), one-level speed reducer (15), second grade speed reducer (17) and rotatory water sealing device (19), planetary reduction mechanism (13), one-level speed reducer (15) with second grade speed reducer (17) all locate the inside of casing (11), one-level speed reducer (15) transmission connect in planetary reduction mechanism (13), second grade speed reducer (17) transmission connect in one-level speed reducer (15), the lateral wall of casing (11) to casing (11) inboard concave establishment forms support frame (125), support frame (125) enclose into with the isolated accommodation space in inside of casing (11), rotatory water sealing device (19) are located in the accommodation space.

2. The cutting reducer according to claim 1, wherein the housing (11) is provided with an opening (116) communicating with the accommodating space.

3. Cutting reducer according to claim 1, characterised in that the axis of said secondary reduction member (17) and the axis of said planetary reduction mechanism (13) are located on the same line, the axis of said primary reduction member (15) is offset from the axis of said secondary reduction member (17) and the axis of said planetary reduction mechanism (13), and said rotating water sealing means (19) is connected to said secondary reduction member (17).

4. The cutting reducer according to claim 3, characterized in that the planetary reduction mechanism (13) comprises a planetary output member (132), the first reduction member (15) is provided with a first gear (152) and a second gear (154) which are fixed relatively, the second reduction member (17) is provided with a third gear (172) and a reducer output shaft (174), the first gear (152) is in transmission connection with the planetary output member (132) of the planetary reduction mechanism (13), and the third gear (172) is in transmission connection with the second gear (154); the axes of the input shaft (134), the planetary output member (132), the third gear (172) and the reducer output shaft (174) are located on the same straight line, the axes of the first gear (152) and the second gear (154) are spaced and parallel to the axes of the input shaft (134), the planetary output member (132) and the reducer output shaft (174), and the rotating water sealing device (19) is located on the straight line where the axes of the input shaft (134), the planetary output member (132), the third gear (172) and the reducer output shaft (174) are located.

5. The cutting reducer of claim 4, wherein the primary reducer (15) comprises two first gears (152) and two second gears (154), each of the first gears (152) and one of the second gears (154) being connected by a connecting portion (156), the two first gears (152) being engaged with external teeth of the planetary output member (132), the two second gears (154) being engaged with the third gear (172), a cavity (158) being formed between the two connecting portions (156), and the holder (125) being located in the cavity (158).

6. The cutting speed reducer according to claim 4, characterized in that the housing (11) is provided with a matching part (112), an inner gear ring (114) is arranged on the inner side of the matching part (112), the planetary speed reducer (13) further comprises an input shaft (134), a planetary gear (135) and a planet carrier (136), the input shaft (134) is provided with a sun gear (137), the planetary gear (135) is rotatably arranged on the planet carrier (136), the outer teeth of the planetary gear (135) are engaged with the outer teeth of the sun gear (137), the outer teeth of the planetary gear (135) are also engaged with the inner gear ring (114) on the housing (11), and the planetary output member (132) is fixedly connected to the planet carrier (136).

7. The cutting reducer according to claim 1, wherein the secondary speed reducer (17) further comprises an extension shaft (176), the extension shaft (176) extending into the receiving space, the rotating water sealing device (19) being provided at an end of the extension shaft (176), the secondary speed reducer (17) further having a first water channel (179) therein, the rotating water sealing device (19) being in communication with the first water channel (179).

8. Cutting unit, comprising a cutting reducer according to any one of claims 1 to 7, a boom section (31), a cutting spindle (33) and a cutting head (35), wherein the boom section (31) is fixedly connected to the housing (11) of the cutting reducer, the cutting spindle (33) is located in the boom section (31) and extends into the cutting head (35), the cutting spindle (33) is fixedly connected to the secondary reducer (17), a second water channel (332) is formed in the cutting spindle (33), and the second water channel (332) is communicated with the rotating water sealing device (19).

9. The cutting part according to claim 8, characterized in that the cutting part further comprises a connecting barrel (37), the connecting barrel (37) being connected to the cutting spindle (33) and the secondary speed reducer (17), respectively.

10. A heading machine comprising a cutting section according to claim 8 or 9.

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