Cutter head assembly of rectangular tube push bench and rectangular tube push bench

Abstract

The utility model relates to a rectangular tube push bench cutter head assembly and a rectangular tube push bench. The rectangular tube push bench cutter head assembly comprises a cutter head, a transmission shaft and a connecting piece which is in transmission connection with the cutter head and the transmission shaft. The cutterhead comprises a cutterhead body, the connecting piece comprises a flange fixedly arranged on the cutterhead body, and a plurality of through holes are formed in the pipe wall of the flange at intervals in the circumferential direction; the connecting bolt can penetrate through the through hole to be in threaded connection with the transmission shaft; the transmission shaft is provided with threaded holes corresponding to the through holes and used for threaded connection. The axes of the through hole and the threaded hole are orthogonal to the axis of the transmission shaft. The rectangular tube push bench cutterhead assembly has the advantages that due to the fact that the flange and the transmission shaft are connected through the connecting bolts, the error-tolerant rate is high, the rectangular tube push bench cutterhead assembly is not affected by slight deformation of the flange in the welding process, and the freedom degree of the cutterhead can be completely limited; in addition, the through hole in the flange and the threaded hole in the transmission shaft are easy to machine and manufacture, and the cutter head is more convenient to assemble and disassemble.

Description

TECHNICAL FIELD

[0001] The utility model relates to rectangular top pipe machine technical field especially relates to a kind of rectangular top pipe machine cutter head subassembly and rectangular top pipe machine. BACKGROUND

[0002] At present, rectangular top pipe machine is widely used in urban comprehensive pipe gallery construction, compared with traditional construction method, pipe jacking machine construction has safety, high efficiency, environmental protection and other advantages.

[0003] Chinese patent document CN116060858A discloses a kind of rectangular top pipe machine, including cutter head, transmission flange and transmission shaft, transmission flange is tubular, with inner circumferential wall and outer circumferential wall, inner circumferential wall is provided with inner spline, transmission shaft is provided with outer spline corresponding to inner spline, by the cooperation of inner spline and outer spline, transmission flange and transmission shaft form connection.The defects and deficiencies existing in the prior art rectangular top pipe machine cutter head subassembly are that: during the manufacturing process of cutter head, multiple spokes need to be welded on the outer circumferential wall of transmission flange, but transmission flange welding after heat will cause spline deformation, eventually leading to cutter head installation easy to jam, affect assembly efficiency. UTILITY MODEL CONTENT

[0004] (One) technical problem to be solved

[0005] In view of the above-mentioned shortcomings and deficiencies of the prior art, the utility model provides a kind of rectangular top pipe machine cutter head subassembly and rectangular top pipe machine, which solves the technical problem that spline connection is easy to deform in the transmission structure of the prior art rectangular top pipe machine, affects assembly efficiency.

[0006] (Two) technical scheme

[0007] In order to achieve the above-mentioned purpose, the main technical scheme adopted by the utility model includes:

[0008] Firstly, the utility model embodiment provides a kind of rectangular top pipe machine cutter head subassembly, including cutter head, transmission shaft and the connecting piece of transmission connection cutter head and transmission shaft;

[0009] The cutter head includes cutter head body, the connecting piece includes: the flange fixedly arranged on the cutter head body, the pipe wall of the flange is provided with multiple through holes spaced apart along the circumference;And the connecting bolt that can be screwed with the transmission shaft through the through hole;

[0010] The transmission shaft is provided with a threaded hole for screwing corresponding each through hole;

[0011] The axis of the through hole and threaded hole is orthogonal to the axis of the transmission shaft.

[0012] Optionally, the pipe wall of the flange is provided with two through holes and two connecting bolts every 90° along the circumference.

[0013] Optionally, two through holes and two connecting bolts are arranged on the pipe wall of the flange every 60° in the circumferential direction.

[0014] Optionally, one of the inner circumferential wall of the flange and the outer circumferential wall of the transmission shaft is provided with a protrusion extending in the axial direction, and the other of the inner circumferential wall of the flange and the outer circumferential wall of the transmission shaft is provided with a groove extending in the axial direction, and the groove is capable of accommodating the protrusion to position the flange of the cutter head in the circumferential direction.

[0015] Optionally, the rectangular pipe jacking machine cutter head assembly further comprises a positioning pin.

[0016] The transmission shaft is divided into a driving part, a blocking part and a plug-in part in the axial direction, the plug-in part is used to plug in the flange, the rear end surface of the flange is provided with a first positioning pin hole, the diameter of the blocking part is greater than that of the plug-in part, the front surface of the blocking part is provided with a second positioning pin hole corresponding to the first positioning pin hole, one end of the positioning pin is plugged into the first positioning pin hole, and the other end of the positioning pin is plugged into the second positioning pin hole, so as to position the flange in the circumferential direction.

[0017] Optionally, the length of the flange in the axial direction is 430mm-450mm.

[0018] Optionally, the transmission shaft is internally provided with a water inlet pipe extending in the axial direction, the cutter head body is internally provided with a plurality of water injection pipes extending in the radial direction, the plurality of water injection pipes are in communication with the water inlet pipe, and the front surface of the cutter head body is provided with a plurality of nozzles in communication with the water injection pipes.

[0019] Optionally, the cutter head further comprises a plurality of cutters.

[0020] The plurality of cutters and the front surface of the cutter head body are detachably connected through locking accessories, or the plurality of cutters and the front surface of the cutter head body are connected in a welding manner.

[0021] In the second aspect, the embodiments of the utility model provide a rectangular pipe jacking machine, which comprises the rectangular pipe jacking machine cutter head assembly.

[0022] (Three) beneficial effects

[0023] The utility model discloses a rectangular top pipe machine cutter head assembly, including cutter head, transmission shaft and the connecting piece of transmission connecting the cutter head and the transmission shaft, the cutter head includes cutter head body, the connecting piece includes: the flange of fixed setting in the cutter head body, the pipe wall of the flange is along the circumferential interval and is equipped with a plurality of through -hole, and the connecting bolt of the through -hole with the transmission shaft screw thread connection can pass, the transmission shaft is equipped with the screw hole for screwing connection with each through -hole, the axis of the through -hole and the screw hole is orthogonal with the axis of the transmission shaft, relative to prior art, its fault tolerance is high, is not influenced slightly by the flange in the welding process Deformation, and can completely limit the degree of freedom of cutter head, in addition, the through -hole on the flange and the screw hole on the transmission shaft are simple in processing and manufacturing, and the cutter head is also more convenient to assemble and disassemble.

[0024] The utility model discloses a rectangular top pipe machine cutter head assembly, adopts connecting bolt connection, relative to prior art, it can shorten the length of flange from 490mm to about 440mm, this significantly reduces the length size of cutter head in the axial direction, makes cutter head can more easily stable excavation face, in addition, the axial length of transmission shaft can also correspondingly shorten about 50mm, this also directly shortens the length of water inlet pipeline, that is to say, water flow can more quickly supply each shower head, and then improve the water spraying efficiency of cutter head, also effectively improve the driving speed of shield machine. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is the sectional view schematic drawing of flange and transmission shaft of embodiment 1 of the rectangular top pipe machine cutter head assembly in the utility model;

[0026] Figure 2 It is the sectional view schematic drawing of flange and transmission shaft of embodiment 1 of the rectangular top pipe machine cutter head assembly in the utility model;

[0027] Figure 3 It is the front view schematic drawing of embodiment 1 of the rectangular top pipe machine cutter head assembly in the utility model;

[0028] Figure 4 It is Figure 1 It is the sectional view schematic drawing of flange and transmission shaft of embodiment 1 of the rectangular top pipe machine cutter head assembly in the utility model;

[0029] Figure 5 It is the partial sectional view schematic drawing of embodiment 2 of the rectangular top pipe machine cutter head assembly in the utility model.

[0030] LEGEND

[0031] 1: cutter head; 101: cutter head body; 102: flange; 103: connecting bolt; 104: cutter; 105: water spraying pipeline; 106: boss; 107: groove; 108: positioning pin; 109: first positioning pin hole; 110: second positioning pin hole;

[0032] 2: transmission shaft; 201: water inlet pipeline. DETAILED DESCRIPTION

[0033] In order to better explain the utility model, so as to facilitate understanding, the following combining with the specific embodiments, the utility model is described in detail. Wherein, the "front", "back", "upper", "lower" and other orientation terms mentioned in this paper are with the orientation of the figure as the reference. Figure 2

[0034] Example 1:

[0035] With reference to Figure 1 , Figure 2 and Figure 3 , the embodiment provides a rectangular pipe jacking machine cutter head assembly, which comprises a cutter head 1, a transmission shaft 2 and a connecting piece connecting the cutter head 1 and the transmission shaft 2.

[0036] The cutter head 1 comprises a cutter head body 101, and the connecting piece comprises a flange 102 fixedly arranged on the cutter head body 101, a plurality of through holes are arranged in the pipe wall of the flange 102 in a circumferential direction at intervals, and connecting bolts 103 capable of being threadedly connected with the transmission shaft 2 are arranged through the through holes; the transmission shaft 2 is provided with a threaded hole for threadedly connecting corresponding each through hole; the axis of the through hole and the threaded hole is perpendicular to the axis of the transmission shaft 2. It should be noted that the fixed connection means that there is no relative movement between the flange 102 and the cutter head body 101, and the flange 102 can be welded on the cutter head body 101, the flange 102 and the cutter head body 101 can be integrally formed, or the flange 102 is fixedly installed on the cutter head body 101 through a plurality of bolts. In addition, when the transmission shaft 2 and the flange 102 are assembled, the plurality of connecting bolts 103 are correspondingly arranged through each through hole, and are screwed with the threaded hole on the transmission shaft 2, so as to fixedly connect the flange 102 and the transmission shaft 2 together.

[0037] The rectangular pipe jacking machine cutter head assembly of the embodiment adopts a plurality of connecting bolts to connect the flange 102 and the transmission shaft 2, and compared with the existing spline connection structure, the fault tolerance is high, is not affected by the slight deformation of the flange 102 in the welding process, and can completely limit the degree of freedom of the cutter head 1; in addition, the through hole on the flange 102 and the threaded hole on the transmission shaft 2 are simple to manufacture, and the cutter head 1 is also more convenient to assemble and disassemble.

[0038] ​In the embodiment, two through holes and two connecting bolts 103 are arranged on the pipe wall of the flange 102 every 90° in the circumferential direction. Specifically, the 90° central angle corresponds to a quarter of the circumference, and the pipe wall of the flange 102 is provided with two through holes every quarter of the circumference, and the outer circumferential surface of the transmission shaft 2 is also provided with two threaded holes every quarter of the circumference, and the number of connecting bolts 103 is eight, and the eight connecting bolts 103 pass through the through holes one by one to be screwed with the threaded holes.

[0039] In the embodiment, the length of the flange 102 in the axial direction is 430mm-450mm. The existing transmission flange with spline connection structure has a length of 490mm or more in the axial direction, and the rectangular pipe jacking machine cutter head assembly of the embodiment can shorten the length of the flange from 490mm to about 440mm due to the use of connecting bolts, which significantly reduces the length of the cutter head in the axial direction, so that the cutter head can more easily stabilize the excavation face.

[0040] Further, the transmission shaft 2 is provided with a water inlet pipe 201 extending in the axial direction, and the cutter head body 101 is provided with a plurality of water injection pipes 105 extending in the radial direction, the plurality of water injection pipes 105 are in communication with the water inlet pipe 201, and the front side of the cutter head body 101 is provided with a plurality of nozzles, and the nozzles are in communication with the water injection pipes 105. It should be noted that the rectangular pipe jacking machine cutter head assembly of the embodiment can shorten the axial length of the flange 102 by about 50mm due to the use of connecting bolts, and the axial length of the transmission shaft 2 can also be correspondingly shortened by about 50mm, which also directly shortens the length of the water inlet pipe 201, that is, the water flow can be supplied to each nozzle more quickly, thereby improving the water injection efficiency of the cutter head 1, and also effectively improving the tunneling speed of the shield machine.

[0041] In the embodiment, the cutter head 1 further comprises a plurality of cutters 104. The plurality of cutters 104 and the front side of the cutter head body 101 are connected by locking accessories, or the plurality of cutters 104 and the front side of the cutter head body 101 are connected by welding.

[0042] Referring to Figure 4In the embodiment, one of the inner circumferential wall of the flange 102 and the outer circumferential wall of the transmission shaft 2 is provided with a protrusion 106 extending in the axial direction, and the other of the inner circumferential wall of the flange 102 and the outer circumferential wall of the transmission shaft 2 is provided with a groove 107 extending in the axial direction, the groove 107 being capable of accommodating the protrusion 106 to position the flange 102 of the cutter head 1 in the circumferential direction. It should be noted that the groove 107 is slightly larger than the protrusion 106, and when the transmission shaft 2 and the flange 102 are inserted, the groove 107 and the protrusion 106 are matched to position the flange 102 in the circumferential direction, so that the through hole on the flange 102 is aligned with the threaded hole on the transmission shaft 2. In the embodiment, the protrusion 106 is a flat key provided on the outer circumferential surface of the transmission shaft 2, and the groove 107 is a key groove provided on the inner circumferential wall of the flange 102.

[0043] Embodiment 2

[0044] The embodiment provides another cutter head assembly of a rectangular pipe jacking machine, which is different from the embodiment 1 in that two through holes and two connecting bolts 103 are arranged on the pipe wall of the flange 102 every 60° in the circumferential direction. Specifically, the 60° central angle corresponds to one sixth of the circumference, and two through holes are arranged on the pipe wall of the flange 102 every one sixth of the circumference, and two threaded holes are arranged on the outer circumferential surface of the transmission shaft 2 every one sixth of the circumference, and the number of connecting bolts 103 is twelve, and the twelve connecting bolts 103 pass through the through holes one by one and are screwed with the threaded holes.

[0045] Referring to Figure 5 The cutter head assembly of the rectangular pipe jacking machine in the embodiment uses a positioning pin 108 to replace the groove-protrusion limiting structure in the embodiment 1. Specifically, the transmission shaft 2 in the embodiment is divided into a driving part, a blocking part and an insertion part in the axial direction, the insertion part is used to be inserted with the flange 102, the rear end surface of the flange 102 is provided with a first positioning pin hole 109, the diameter of the blocking part is larger than that of the insertion part, the front surface of the blocking part is provided with a second positioning pin hole 110 corresponding to the first positioning pin hole 109, one end of the positioning pin 108 is inserted with the first positioning pin hole 109, and the other end of the positioning pin 108 is inserted with the second positioning pin hole 110 to position the flange 102 in the circumferential direction.

[0046] The embodiment also provides a rectangular pipe jacking machine, which comprises the cutter head assembly of the rectangular pipe jacking machine.

[0047] The rest is the same as the embodiment 1, which will not be repeated here.

[0048] In the description of the utility model, it is necessary to understand that the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include one or more of the features. In the description of the utility model, the meaning of "multiple" is two or more than two, unless otherwise specifically limited.

[0049] In the utility model, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrated; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium; it can be the communication inside two elements or the interaction relationship of two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0050] In the utility model, unless otherwise specifically defined and limited, the first feature is "on" or "under" the second feature, which can be direct contact of the first and second features, or indirect contact of the first and second features through intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature, can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature, can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is lower than that of the second feature.

[0051] In the description of the specification, the description of the terms "one embodiment", "some embodiments", "embodiment", "example", "specific example" or "some examples" 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 the specification, the illustrative description 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. In addition, those skilled in the art can combine and combine the different embodiments or examples described in the specification and the features of different embodiments or examples without contradiction.

[0052] Although the embodiments of the utility model have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limiting the utility model, and those skilled in the art can modify, modify, replace and change the above embodiments within the scope of the utility model.

Claims

1. A rectangular jacking pipe machine cutter head assembly characterized in that: The cutter head (1), a transmission shaft (2), and a connecting piece connecting the cutter head (1) and the transmission shaft (2); The cutter head (1) comprises a cutter head body (101), the connecting piece comprises a flange (102) fixedly arranged on the cutter head body (101), a plurality of through holes are arranged in the pipe wall of the flange (102) at intervals in the circumferential direction, and connecting bolts (103) are threadedly connected with the transmission shaft (2) through the through holes; The transmission shaft (2) is provided with a threaded hole corresponding to each through hole for threadedly connecting; The axis of the through hole and the threaded hole is perpendicular to the axis of the transmission shaft (2).

2. The rectangular tube mill tool head assembly of claim 1 wherein: Two through holes and two connecting bolts (103) are arranged at intervals of 90° in the circumferential direction of the pipe wall of the flange (102).

3. The rectangular tube mill die assembly of claim 1 wherein: Two through holes and two connecting bolts (103) are arranged at intervals of 60° in the circumferential direction of the pipe wall of the flange (102).

4. The rectangular tube mill die assembly of claim 1 wherein: One of the inner circumferential wall of the flange (102) and the outer circumferential wall of the transmission shaft (2) is provided with a boss (106) extending in the axial direction, and the other is provided with a groove (107) extending in the axial direction, the groove (107) can accommodate the boss (106) to position the flange (102) of the cutter head (1) in the circumferential direction.

5. The rectangular tube mill die assembly of claim 1 wherein: The rectangular top pipe machine cutter head assembly further comprises a positioning pin (108); The transmission shaft (2) is divided into a driving part, a blocking part and a plug-in part in the axial direction, the plug-in part is used for plugging with the flange (102), the rear end surface of the flange (102) is provided with a first positioning pin hole (109), the diameter of the blocking part is greater than that of the plug-in part, the front side surface of the blocking part is provided with a second positioning pin hole (110) corresponding to the first positioning pin hole (109), one end of the positioning pin (108) is plugged into the first positioning pin hole (109), and the other end of the positioning pin (108) is plugged into the second positioning pin hole (110), so as to position the flange (102) in the circumferential direction.

6. The rectangular tube mill tool head assembly of claim 2 or 3, wherein: The length of the flange (102) in the axial direction is 430mm-450mm.

7. The rectangular tube mill tool head assembly of claim 6 wherein: The transmission shaft (2) is internally provided with a water inlet pipeline (201) extending in the axial direction, the cutter head body (101) is internally provided with a plurality of water injection pipelines (105) extending in the radial direction, the plurality of water injection pipelines (105) are in communication with the water inlet pipeline (201), and the front side surface of the cutter head body (101) is provided with a plurality of nozzles in communication with the water injection pipelines (105).

8. The rectangular tube mill die assembly of claim 1 wherein: The cutter head (1) further comprises a plurality of cutters (104); The plurality of cutters (104) and the front side surface of the cutter head body (101) are detachably connected through locking accessories, or the plurality of cutters (104) and the front side surface of the cutter head body (101) are connected by welding.

9. A rectangular jacking push bench, characterized in that The rectangular top pipe machine cutter head assembly of any one of claims 1-8.

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