AU2019320140B2

AU2019320140B2 - Cutting apparatus of tunneling machine, and tunneling machine

Info

Publication number: AU2019320140B2
Application number: AU2019320140A
Authority: AU
Inventors: Yutao LIU; Yu Song; Nan Zhang
Original assignee: Xuzhou XCMG Foundation Construction Machinery Co Ltd
Current assignee: Xuzhou XCMG Foundation Construction Machinery Co Ltd
Priority date: 2018-08-08
Filing date: 2019-07-25
Publication date: 2023-02-02
Anticipated expiration: 2039-07-25
Also published as: WO2020029803A1; CN108825227A; AU2019320140A1; CN108825227B

Abstract

A cutting apparatus of a tunneling machine, comprising: a shaft (1); a cutting component (2) that is provided with a pore channel (3) extending towards the shaft (1); a threaded fastening member (4) that runs through the pore channel (3) and is connected with the shaft (1) so as to connect the cutting component (2) and the shaft (1) together; a fixing sleeve (5) that is provided in the pore channel (3) and sleeved between the threaded fastening member (4) and the cutting component (2), wherein the fixing sleeve (5) and the threaded fastening member (4) are fixed relative to each other; and a positioning part used for limiting the rotation of the fixing sleeve (5) within the pore channel (3), wherein the positioning part comprises multiple positioning teeth (6) circumferentially arranged along the threaded fastening member (4) and a positioning component (7) used for limiting the circumferential rotation of the positioning teeth (6) around the threaded fastening member (4), and one of the positioning tooth (6) and the positioning component (7) is provided on the fixing sleeve (5), and the other one is provided on the cutting component (2). In addition, also disclosed is a tunneling machine comprising the cutting apparatus.

Description

TUNNELING MACHINE CUTTING APPARATUS AND TUNNELING MACHINE TECHNICAL FIELD

[0001] The present invention relates to the field of construction machinery, and in particular to

a tunneling machine cutting apparatus and a tunneling machine.

BACKGROUND

[0002] FIG. 1 shows a structural schematic diagram of a tunneling machine cutting apparatus

in the prior art. As shown in FIG. 1, the tunneling machine cutting apparatus in the prior art

includes the rotating shaft ' and the cutting head 2' sleeved at the end portion of the rotating

shaft 1. The cutting head 2' is provided with the pore channel 3' extending toward the rotating

shaft 1'. The bolt 4' is connected to the rotating shaft ' through the pore channel 3' to connect

the cutting head 2' and the rotating shaft 1'. During the cutting operation of the cutting apparatus,

the bolt connecting the rotating shaft ' and the cutting head 2' is easy to loosen due to a large

impact, which affects the normal cutting operation.

SUMMARY

[0003] The present invention aims to provide a tunneling machine cutting apparatus and a

tunneling machine to solve the problem that the threaded fastener in the prior art is easy to

loosen.

[0004] According to one aspect of an embodiment of the present invention, the present

invention provides a cutting apparatus, including:

[0005] a shaft;

[0006] a cutting component, provided with a pore channel extending toward the shaft;

[0007] a threaded fastener, connected to the shaft through the pore channel to connect the cutting component and the shaft;

[0008] a fixing sleeve, provided in the pore channel and sleeved between the threaded fastener and the cutting component, wherein the fixing sleeve and the threaded fastener are fixed relative to each other; and

[0009] a positioning part, configured for limiting a rotation of the fixing sleeve in the pore channel, wherein the positioning part includes a plurality of positioning teeth arranged along

the circumference of the threaded fastener and a positioning component configured for limiting

a circumferential rotation of the positioning teeth around the threaded fastener, one of the positioning tooth and the positioning component is provided on the fixing sleeve, and the other

one is provided on the cutting component; the positioning component is movable relative to the

positioning teeth to switch between a first position that limits the rotation of the positioning teeth and a second position that allows the rotation of the positioning teeth.

[0010] Optionally, the cutting apparatus further includes an elastic component configured for

pushing and pressing the positioning component toward the first position.

[0011] Optionally, the positioning tooth include:

[0012] a first side, abutting against the positioning component to limit a rotation of the fixing

sleeve in a first direction; and

[0013] a second side, facing away from the first side and configured for pushing and pressing

the fixing sleeve toward the second position when the fixing sleeve rotates in a second direction,

wherein the second direction is opposite to the first direction.

[0014] Optionally, the first side is inclined downstream of the first direction in a direction

away from the threaded fastener; and

[0015] the second side is inclined downstream of the first direction in the direction away from the threaded fastener.

[0016] Optionally, the shape of the positioning component is adapted to the shape of a groove between two adjacent positioning teeth.

[0017] Optionally, at least two positioning components are provided. The distance between

two adjacent positioning teeth is Li, the distance between two adjacent positioning components

is L 2 , Li#n L 2, and L2#n Li, where n is a natural number.

[0018] Optionally, the number of the positioning components isN, L2>Li, and L1 / N.

[0019] Optionally, the cutting apparatus further includes a limiting component configured for

limiting the fixing sleeve in the pore channel.

[0020] According to another aspect of the present invention, a tunneling machine is further

provided, including the cutting apparatus described above.

[0021] By means of the technical solution of the present invention, the fixing sleeve is capable of limiting the rotation of the threaded fastener, thereby overcoming the problem that the

threaded fastener is easily loosened.

[0022] Other features and advantages of the present invention will become apparent through

the detailed description of exemplary embodiments of the present invention with reference to the drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate embodiments of the present invention or technical solutions in the prior art, the drawings used in the description of the embodiments or the prior

art are briefly introduced below. Obviously, the drawings in the following description are

merely some embodiments of the present invention, based on these drawings, those of ordinary skill in the art may obtain other drawings without creative efforts.

[0024] FIG. 1 shows a schematic diagram of the structure of a tunneling machine cutting

apparatus in the prior art;

[0025] FIG. 2 shows a schematic diagram of the structure of a tunneling machine cutting apparatus according to an embodiment of the present invention;

[0026] FIG. 3 shows a side view of the structure of FIG. 2;

[0027] FIG. 4 shows an enlarged view of the portion A encircled in FIG. 2;

[0028] FIG. 5 shows a side view of the structure of FIG. 4;

[0029] FIG. 6 shows a schematic diagram of the internal structure of FIG. 4;

[0030] FIG. 7 shows a schematic diagram of the structure of a cutting component of the

tunneling machine cutting apparatus according to the embodiment of the present invention;

[0031] FIG. 8 shows a sideview of the structure of FIG. 7;

[0032] FIG. 9 shows a schematic diagram of the structure of a fixing sleeve of the tunneling

machine cutting apparatus according to the embodiment of the present invention; and

[0033] FIG. 10 shows a side view of the structure of FIG. 9.

[0034] In the figures:

[0035] 1, shaft; 2, cutting component; 3, pore channel; 4, threaded fastener; 4a, nut; 4b, threaded rod; 5, fixing sleeve; 6, positioning tooth; 6a, first side; 6b, second side; 7, positioning

component; 8, elastic component; 9, elastic retaining ring; 10, limiting component; 11, receiving cavity.

DETAILED DESCRIPTION OF THE EMBODIMENTS

[0036] Hereinafter, the technical solution in the embodiments of the present invention will be

clearly and completely described in conjunction with the drawings in the embodiments of the

present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of the present invention.

[0037] FIG. 2 shows a schematic diagram of the structure of a tunneling machine cutting

apparatus according to the present embodiment. FIG. 3 shows a side view of the structure of FIG. 2. FIG. 4 shows an enlarged view of the portion A encircled in FIG. 2. FIG. 5 shows a side

view of the structure of FIG. 5.

[0038] As shown in FIGS. 1 to 5, the tunneling machine cutting apparatus in the present embodiment includes the shaft 1, the cutting component 2 provided with the pore channel 3

extending toward the shaft 1, the threaded fastener 4 connected to the shaft 1 through the pore

channel 3, the fixing sleeve 5 provided in the pore channel 3 and sleeved between the threaded fastener 4 and the cutting component 2, and the positioning part configured for limiting the

rotation of the fixing sleeve 5 in the pore channel 3. In the present embodiment, the threaded

fastener 4 is connected to the end face of the shaft 1. The pore channel 3 and the shaft 1 extend in the same direction.

[0039] The fixing sleeve 5 is fixed relative to threaded fastener 4, and the positioning part

limits the rotation of fixing sleeve 5 in the pore channel 3 to limit the rotation of threaded

fastener 4, which solves the problem that the threaded fastener in the prior art is easily loosened.

[0040] The tunneling machine cutting apparatus further includes the limiting component 10

configured for limiting the fixing sleeve 5 in the pore channel 3 and the elastic retaining ring

provided at one side of the limiting component 10 facing away from the fixing sleeve 5.

[0041] The threaded fastener 4 includes the threaded rod 4b and the nut 4a provided atone end

of the threaded rod 4b. The pore channel 3 includes a first pore channel adjacent to the shaft 1

and a second pore channel connected to the first pore channel. The inner diameter of the first pore channel is smaller than that of the second pore channel. The threaded rod 4b is connected

to the shaft I1 through the first pore channel. The nut 4a is located in the second pore channel.

The fixing sleeve 5 is provided in the second pore channel and is sleeved between the nut 4a and the cutting component 2.

[0042] The shape of the inner cavity of the fixing sleeve 5 is adapted to the shape of the nut 4a, and the fixing sleeve 5 is sleeved on the nut 4a to fix the fixing sleeve 5 to the nut 4a. Optionally, both the cross-sectional shape of the nut 4a and the cross-sectional shape of the inner cavity of

the fixing sleeve 5 are polygonal so that the fixing sleeve 5 and the nut 4a are fixed relative to each other. Certainly, the fixing sleeve 5 and the nut 4a may have other non-circular shapes.

[0043] Referring to FIGS. 6, 9 and 10, the fixing sleeve 5 is provided with a plurality of

positioning teeth 6 arranged along the circumference of the threaded fastener 4. The cutting component 2 is provided with the positioning component 7 configured for limiting the

circumferential rotation of the positioning teeth 6 around the threaded fastener 4. The shape of

the positioning component 7 is adapted to the groove between two adjacent positioning teeth 6. The positioning component 7 located between the two adjacent positioning teeth 6 limits the

rotation of the positioning teeth 6 around the threaded fastener 4 to limit the rotation of the

threaded fastener 4 in the pore channel 3, thereby preventing the threaded fastener 4 from loosening.

[0044] Certainly, it is also feasible to arrange the positioning teeth 6 on the cutting component

2 and arrange the positioning component 7 on the fixing sleeve 5.

[0045] The positioning component 7 is movable along the radial direction of the threaded fastener 4 to switch between the first position that limits the rotation of the positioning teeth 6

and the second position that allows the rotation of the positioning teeth 6. When the threaded

fastener 4 needs to be removed, the positioning component 7 is moved in a direction away from the positioning teeth 6 to the position that allows the rotation of the fixing sleeve 5, so that the

threaded fastener 7 can be removed from the cutting component 2 and the shaft 1 to facilitate

separating the cutting component 2 from the shaft 1.

[0046] The tunneling machine cutting apparatus further includes the elastic component 8

configured for pushing and pressing the positioning component 7 toward the first position.

[0047] Referring to FIGS. 7 and 8, the cutting component 2 is provided with the receiving cavity 11 communicating with the pore channel 3. The receiving cavity 11 extends from the

outside of the cutting component 2 to the pore channel 3 to facilitate installing the positioning component 7 into the receiving cavity 11 from the outside of the cutting component 2.

[0048] The cross-section of at least one section of the receiving cavity 11 close to the pore

channel 3 is tapered along a direction close to the pore channel 3 to limit the distance that the positioning component 7 moves toward the inside of the pore channel 3.

[0049] The positioning component 11 is movably disposed in the receiving cavity 11. The

positioning component 11 can extend out of the receiving cavity 11 and engage with the positioning teeth 6 to limit the rotation of the positioning teeth 6. The positioning component 11

can be retracted into the receiving cavity 11 to allow the fixing sleeve 5 and the threaded

fastener 4 to rotate in the pore channel 3. The position at which the positioning component 7 is engaged with the positioning tooth 6 is the first position described above, while the position at

which the positioning component 7 retracts into the receiving cavity 11 is the second position

described above.

[0050] In the present embodiment, the positioning part can only limit the rotation of the fixing sleeve 5 along the first direction, and the fixing sleeve 5 can rotate in the pore channel 3 along

the second direction opposite to the first direction. The first direction is a direction in which the

threaded fastener 4 is loosened, while the second direction is a direction in which the threaded fastener 4 is tightened.

[0051] Referring to FIG. 6, the positioning tooth 6 includes the first side 6a abutting against

the positioning component 7. The first side 6a abuts against the positioning component 7 to limit the rotation of the fixing sleeve 5 and the threaded fastener 4 along the first direction.

[0052] The positioning tooth 6 further includes the second side 6b facing away from the first

side 6a. The second side 6b is configured for pushing and pressing the positioning component 7 toward the second position against the elastic force of the elastic component 8 when the fixing

sleeve 5 rotates along the second direction.

[0053] The first side 6a is inclined downstream of the first direction along a direction away from the threaded fastener 4. The second side 6b is inclined downstream of the first direction

along the direction away from the threaded fastener 4.

[0054] Optionally, the end face of the nut 4a is provided with a connection structure fitted with a tool that rotates the threaded fastener 4. Optionally, the connection structure includes a

polygonal hole formed on the end face of the nut 4a.

[0055] When the threaded fastener 4 is rotated along the first direction using the tool, the

positioning component 7 abuts against the first side 6a of the positioning tooth, and neither the

fixing sleeve 5 nor the threaded fastener 4 can be rotated.

[0056] When the threaded fastener 4 is rotated along the second direction using the tool, the

fixing sleeve 5 is rotated along the second direction with threaded fastener 4, and the second side 6b of the positioning tooth 6 pushes and presses the positioning component 7 toward the

second position, so that the threaded fastener 4 can rotate along the second direction.

[0057] In the present embodiment, at least two positioning components 7 are provided, the distance between two adjacent positioning teeth 6 is Li, the distance between two adjacent

positioning components 7 is L 2 , Li:n L 2, and L2#n Li, where n is a natural number. Therefore, in the two adjacent positioning components 7, the distance that the first positioning component

7 engaged with the positioning tooth 6 rotates relative to the second positioning component 7

engaged with the positioning tooth can be less than the distance between the two adjacent positioning teeth 6, so that the distance between two adjacent positioning positions of the

threaded fastener 4 is smaller.

[0058] The number of the positioning components 7 is N, L2>Li, and L/L 2-L N. The engagement relationship between the positioning component 7 and the positioning tooth 6

forms a structure similar to a vernier caliper so that the distance between the two adjacent

positioning positions of the threaded fastener 4 is smaller.

[0059] According to another aspect of the present invention, the present embodiment further provides a tunneling machine, including the tunneling machine cutting apparatus described above.

[0060] The reference to any prior art in this specification is not, and should not be taken as, an acknowledgement or any form of suggestion that such prior art forms part of the common general knowledge.

[0061] It will be understood that the terms "comprise" and "include" and any of their

derivatives (e.g. comprises, comprising, includes, including) as used in this specification, and the claims that follow, is to be taken to be inclusive of features to which the term refers, and is not meant to exclude the presence of any additional features unless otherwise stated or implied.

[0062] In some cases, a single embodiment may, for succinctness and/or to assist in

understanding the scope of the disclosure, combine multiple features. It is to be understood that

in such a case, these multiple features may be provided separately (in separate embodiments), or in any other suitable combination. Alternatively, where separate features are described in

separate embodiments, these separate features may be combined into a single embodiment

unless otherwise stated or implied. This also applies to the claims which can be recombined in

any combination. That is a claim may be amended to include a feature defined in any other claim. Further a phrase referring to "at least one of' a list of items refers to any combination of

those items, including single members. As an example, "at least one of: a, b, or c" is intended to cover: a, b, c, a-b, a-c, b-c, and a-b-c.

[0063] The above is merely an exemplary embodiment of the present invention and is not

intended to limit the present invention. Any modifications, equivalent replacements,

improvements and the like made within the spirit and principles of the present invention shall fall within the scope of protection of the present invention.

Claims

CLAIMS What is claimed is:

1. A cutting apparatus for a tunnelling machine, comprising:

a shaft;

a cutting component, provided with a pore channel extending toward the shaft;

a threaded fastener, connected to the shaft through the pore channel to connect the cutting

component and the shaft;

a fixing sleeve, provided in the pore channel and sleeved between the threaded fastener

and the cutting component, wherein the fixing sleeve and the threaded fastener are fixed

relative to each other; and

a positioning part, configured for limiting a rotation of the fixing sleeve in the pore channel, wherein the positioning part comprises a plurality of positioning teeth arranged along a

circumference of the threaded fastener and a positioning component configured for limiting a

circumferential rotation of the positioning teeth around the threaded fastener, one of the positioning tooth and the positioning component is provided on fixing sleeve, and the other one

is provided on the cutting component; the positioning component is movable relative to the positioning teeth to switch between a first position that limits the rotation of the positioning teeth and a

second position that allows the rotation of the positioning teeth.

2. The cutting apparatus according to claim 1, further comprising an elastic component configured for pushing and pressing the positioning component toward the first position.

3. The cutting apparatus according to claim 1, characterized in that the positioning tooth

comprises: a first side, abutting against the positioning component to limit the rotation of the fixing sleeve along a first direction; and a second side, facing away from the first side and configured for pushing and pressing the positioning component toward the second position when the fixing sleeve rotates along a second direction, wherein the second direction is opposite to the first direction.

4. The cutting apparatus according to claim 3, characterized in that

the first side is inclined downstream of the first direction along a direction away from the threaded fastener; and

the second side is inclined downstream of the first direction along the direction away from

the threaded fastener.

5. The cutting apparatus according to claim 1, characterized in that a shape of the

positioning component is adapted to a shape of a groove between two adjacent positioning teeth.

6. The cutting apparatus according to claim 1, characterized in that at least two positioning

components are provided, a distance between two adjacent positioning teeth is Li, a distance

between two adjacent positioning components is L 2, Li:n L 2 , and L2#n Li, wherein n is a natural number.

7. The cutting apparatus according to claim 6, characterized in that a number of the

positioning components is N, L 2 >Li, and L1/(L 2-Li)<N.

8. The cutting apparatus according to claim 1, further comprising a limiting component configured for limiting the fixing sleeve in the pore channel.

9. A tunnelling machine, comprising the cutting apparatus according to any one of claims 1 to 8.