Square pile hole-forming drill bit

Abstract

The utility model relates to the technical field of square pile hole forming, in particular to a square pile hole forming drill bit. The square pile hole-forming drill bit comprises a connecting support, two power mechanisms and two cutting rollers, the two power mechanisms are both connected to the connecting support, each power mechanism comprises a transmission assembly, an output shaft, a sealing assembly and two driving assemblies, the transmission assemblies are located in the sealing assemblies, the output ends of the two driving assemblies both extend into the sealing assemblies, and the cutting rollers are arranged on the output shafts. The two power mechanisms are connected with the output shaft through transmission assemblies to drive the output shaft to rotate, and the output shafts of the two power mechanisms are connected with the two cutting rollers correspondingly to drive the cutting rollers to rotate along the axes of the cutting rollers. Due to the fact that the power mechanism further comprises the two driving assemblies, the two driving assemblies are connected with the transmission assembly so as to drive the cutting roller connected with the output shaft, and the power of the drill bit is improved. And meanwhile, the power mechanism is provided with the sealing assembly, so that the transmission mechanism in the sealing assembly is well sealed, and the reliability of the power mechanism is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of square pile hole forming, in particular to a square pile hole forming drill bit. Background Art

[0002] At present, the construction method of using rotary drilling rigs and square pile drill bits to form square pile holes is becoming more and more common in square pile hole construction. However, in actual use, the existing square pile drill bits have complex structures and low power, and poor rock breaking ability, and are only suitable for soft soil or soft rock layers. At the same time, the equipment reliability is low when constructing pile holes with severe water seepage.

[0003] Therefore, there is an urgent need for a square pile hole-forming drill bit with large power and good sealing performance. Utility Model Content

[0004] 1. Technical issues to be resolved

[0005] In view of the above-mentioned shortcomings and deficiencies of the prior art, the utility model provides a square pile hole forming drill bit, which solves the technical problems of low power and poor sealing of the square pile hole forming drill bit.

[0006] (II) Technical solution

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

[0008] An embodiment of the utility model provides a square pile hole-forming drill bit, comprising a connecting bracket, two power mechanisms and two cutting rollers; the two power mechanisms are both connected to the connecting bracket; the power mechanism comprises a transmission assembly, an output shaft, a sealing assembly and two drive assemblies, the transmission assembly is located in the sealing assembly, the output ends of the two drive assemblies both extend into the sealing assembly, and are connected to the output shaft through the transmission assembly to drive the output shaft to rotate; the output shafts of the two power mechanisms are respectively connected to the two cutting rollers to drive the cutting rollers to rotate along their own axes; the two cutting rollers are arranged along the same axis.

[0009] Preferably, the sealing assembly includes a housing and an inner key sleeve, the housing is connected to the connecting bracket; the inner key sleeve is inserted into the housing to form a sealed space inside the housing; the output shaft is sleeved in the inner key sleeve, the transmission assembly is located in the sealed space and drives the inner key sleeve to rotate to drive the output shaft in the inner key sleeve to rotate.

[0010] Preferably, the box body includes a main body and an end cover buckled with the main body; the main body is connected to the connecting bracket, one end of the main body is open, and the end cover is sleeved on the inner key sleeve and buckled with the opening.

[0011] Preferably, the transmission assembly includes a slewing support body, a second gear and two first gears; the two first gears are respectively connected to the output end of the driving assembly, the two first gears are meshed with the second gear, and the second gear is sleeved and fixed on the inner key sleeve; the inner ring of the slewing support body is sleeved on the inner key sleeve and arranged at intervals, and the slewing support body is connected to the inner wall of the box body; the outer ring of the slewing support body is fixedly connected to the second gear.

[0012] Preferably, the power mechanism further comprises a bearing; the bearing is located in the housing, and the outer ring of the bearing is connected to the housing; the bearing sleeve is arranged on the inner key sleeve, and the inner ring of the bearing is connected to the inner key sleeve.

[0013] Preferably, the cutting drum comprises a drum body and a plurality of pick seats arranged on the drum body; the plurality of pick seats are arranged on the outer surface and the outer end surface of the drum body; and the sealing component of the power mechanism is located inside the drum body.

[0014] Preferably, the cutting drum further comprises a support plate arranged in the drum body.

[0015] Preferably, the cutting roller also includes an annular rib plate and a plurality of triangular rib plates; the plurality of triangular rib plates are arranged at intervals and the plurality of triangular rib plates form an annular structure; the bottom end of the triangular rib plate is connected to the support plate, the side end of the triangular rib plate is connected to the inner wall of the roller body, the annular rib plate is arranged on the outer end face of the roller body, and a plurality of cutting tooth seats are arranged at intervals on the annular rib plate.

[0016] Preferably, the connecting bracket includes a top plate, two connecting columns and two connecting plates; the top ends of the two connecting columns are connected to the top plate, the two connecting plates are respectively connected to the two connecting columns and the two connecting plates are arranged opposite to each other; the two sides of the sealing components of the two power mechanisms are respectively connected to the two connecting plates.

[0017] Preferably, the connecting bracket further includes a plurality of reinforcing ribs arranged on the top plate.

[0018] (III) Beneficial effects

[0019] The beneficial effects of the utility model are:

[0020] The square pile hole drill bit of the utility model includes a power mechanism. Since the power mechanism also includes two drive components, the two drive components are connected to the transmission component to drive the cutting roller connected to the output shaft, thereby improving the power of the drill bit. At the same time, since the power mechanism is provided with a sealing component, the transmission mechanism in the sealing component is well sealed, thereby improving the reliability of the power mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the structure of the square pile hole forming drill bit of the utility model;

[0022] Figure 2 It is a structural schematic diagram of connecting the bracket and the power mechanism;

[0023] Figure 3 is a structural schematic diagram of a connecting bracket;

[0024] Figure 4 It is a structural diagram of the power mechanism;

[0025] Figure 5 for Figure 4 Longitudinal section of

[0026] Figure 6 is a schematic diagram of the structure of the cutting drum;

[0027] Figure 7 It is a structural schematic diagram of the pick seat.

[0028] [Description of Reference Numerals]

[0029] 1: connecting bracket; 11: top plate; 12: connecting column; 13: connecting plate; 14: reinforcing rib;

[0030] 2: power mechanism; 21: driving assembly; 22: transmission assembly; 221: first gear; 222: second gear; 223: slewing bearing; 23: output shaft; 24: sealing assembly; 241: housing; 2411: body; 2412: end cover; 242: inner key sleeve; 25: bearing;

[0031] 3: cutting drum; 31: drum body; 32: pick seat; 33: support plate; 34: triangular rib plate; 35: annular rib plate. DETAILED DESCRIPTION

[0032] In order to better explain the present invention and facilitate understanding, the present invention is described in detail below through specific implementation modes in conjunction with the accompanying drawings.

[0033] like Figure 1 As shown, this embodiment provides a square pile hole drill bit, which includes a connecting bracket 1, two power mechanisms 2 and two cutting drums 3. Among them, the two power mechanisms 2 are connected to the connecting bracket 1, and the power mechanism 2 includes a transmission assembly 22, an output shaft 23, a sealing assembly 24 and two driving assemblies 21. The transmission assembly 22 is located in the sealing assembly 24. The output ends of the two driving assemblies 21 extend into the sealing assembly 24 and are connected to the output shaft 23 through the transmission assembly 22 to drive the output shaft 23 to rotate. The output shafts 23 of the two power mechanisms 2 are respectively connected to the two cutting drums 3 to drive the cutting drums 3 to rotate along their own axes. The two cutting drums 3 are arranged along the same axis.

[0034] In the square pile hole drill bit of this embodiment, since the power mechanism 2 also includes two driving components 21, the two driving components 21 are connected to the transmission component 22 to drive the cutting drum 3 connected to the output shaft 23, thereby improving the power of the drill bit. At the same time, since the power mechanism 2 is provided with a sealing component 24, the transmission mechanism in the sealing component 24 is well sealed, thereby improving the reliability of the power mechanism 2.

[0035] like Figure 2-Figure 3 As shown, the connection bracket 1 includes a top plate 11, two connection columns 12 and two connection plates 13. The top ends of the two connection columns 12 are connected to the top plate 11, the two connection plates 13 are respectively connected to the two connection columns 12 and the two connection plates 13 are arranged opposite to each other, and the two sides of the sealing components 24 of the two power mechanisms 2 are respectively connected to the two connection plates 13. In order to improve the strength of the top plate 11, the connection bracket 1 also includes a plurality of reinforcing ribs 14 arranged on the top plate 11.

[0036] It should be noted that, in order to make the structure more compact, the drive components 21 in the two drive mechanisms are arranged in opposite directions.

[0037] like Figure 4 and Figure 5 As shown, the sealing assembly 24 includes a housing 241 and an inner key sleeve 242. Figure 2 As shown, the box body 241 is connected to the connecting bracket 1. Figure 5 As shown, the inner key sleeve 242 is inserted into the box body 241 to form a sealed space in the box body 241, the output shaft 23 is sleeved in the inner key sleeve 242, the transmission assembly 22 is located in the sealed space and drives the inner key sleeve 242 to rotate to drive the output shaft 23 in the inner key sleeve 242 to rotate, wherein the inner key sleeve 242 and the output shaft 23 are connected by a key.

[0038] like Figure 5 As shown, the box body 241 includes a main body 2411 and an end cover 2412 buckled with the main body 2411, the main body 2411 is connected to the connecting bracket 1, one end of the main body 2411 is open, and the end cover 2412 is sleeved on the inner key sleeve 242 and buckled with the opening.

[0039] like Figure 5As shown, the transmission assembly 22 includes a slewing bearing 223, a second gear 222 and two first gears 221, the two first gears 221 are respectively connected to the output ends of the two driving assemblies 21, the two first gears 221 are meshed with the second gear 222, the second gear 222 is sleeved and fixed on the inner key sleeve 242, the inner ring of the slewing bearing 223 is sleeved on the inner key sleeve 242 and arranged at intervals, the slewing bearing 223 is connected to the inner wall of the box body 241, and the outer ring of the slewing bearing 223 is fixedly connected to the second gear 222. The transmission mechanism also includes a bearing 25, the bearing 25 is located in the box body 241, the outer ring of the bearing 25 is connected to the box body 241, the bearing 25 is sleeved on the inner key sleeve 242 and the inner ring of the bearing 25 is connected to the inner key sleeve 242. In actual application, the output end of the driving assembly 21 drives the first gear 221 to rotate, the second gear 222 meshing with the first gear 221 rotates, and then the inner key sleeve 242 fixedly connected to the second gear 222 rotates to drive the output shaft 23 in the inner key sleeve 242 to rotate. Since the output shaft 23 is connected to the cutting drum, it finally drives the cutting drum to rotate.

[0040] like Figure 6 As shown, the cutting drum 3 includes a drum body 31 and a plurality of pick seats 32. The plurality of pick seats 32 are arranged on the outer surface and the outer end face of the drum body 31. The sealing assembly 24 of the power mechanism 2 is located inside the drum body 31. In order to improve the strength of the drum body 31, the cutting drum 3 also includes a support plate 33 and a plurality of triangular ribs 34. The support plate 33 is arranged inside the drum body 31. The triangular ribs 34 are arranged at intervals and the plurality of triangular ribs 34 form an annular structure. The bottom ends of the triangular ribs 34 are connected to the support plate 33, and the side ends of the triangular ribs 34 are connected to the inner wall of the drum body 31. The cutting drum also includes an annular rib 35. The annular rib 35 is arranged on the outer end face of the drum body 31. The pick seats 32 arranged on the outer end face of the cutting drum 3 are arranged on the annular rib 35 at intervals, as shown in FIG. Figure 7 , which is a schematic structural diagram of the pick holder 32 .

[0041] In the description of the present utility model, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0042] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] In the present utility model, unless otherwise clearly specified and limited, when a first feature is “on” or “below” a second feature, it may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, when a first feature is “above”, “above” or “above” a second feature, it may be that the first feature is directly above or obliquely above the second feature, or it may simply mean that the first feature is higher in level than the second feature. When a first feature is “below”, “below” or “below” a second feature, it may be that the first feature is directly below or obliquely below the second feature, or it may simply mean that the first feature is lower in level than the second feature.

[0044] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "embodiment", "example", "specific example" or "some examples" 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 representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0045] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A square pile hole drill bit, characterized in that: It comprises a connecting bracket (1), two power mechanisms (2) and two cutting rollers (3); The two power mechanisms (2) are both connected to the connecting bracket (1); The power mechanism (2) comprises a transmission assembly (22), an output shaft (23), a sealing assembly (24) and two drive assemblies (21); the transmission assembly (22) is located in the sealing assembly (24); the output ends of the two drive assemblies (21) both extend into the sealing assembly (24) and are connected to the output shaft (23) via the transmission assembly (22) to drive the output shaft (23) to rotate; The output shafts (23) of the two power mechanisms (2) are respectively connected to the two cutting rollers (3) to drive the cutting rollers (3) to rotate along their own axes; The two cutting rollers (3) are arranged along the same axis.

2. The square pile hole drilling bit according to claim 1, characterized in that: The sealing assembly (24) comprises a box body (241) and an inner key sleeve (242), and the box body (241) is connected to the connecting bracket (1); The inner key sleeve (242) is inserted into the box body (241) to form a sealed space in the box body (241); The output shaft (23) is sleeved in the inner key sleeve (242), and the transmission assembly (22) is located in the sealed space and drives the inner key sleeve (242) to rotate so as to drive the output shaft (23) in the inner key sleeve (242) to rotate.

3. The square pile hole drilling bit according to claim 2, characterized in that: The box body (241) comprises a main body (2411) and an end cover (2412) buckled with the main body (2411); The body (2411) is connected to the connecting bracket (1), one end of the body (2411) is open, and the end cover (2412) is sleeved on the inner key sleeve (242) and buckled with the opening.

4. The square pile hole drilling bit according to claim 2, characterized in that: The transmission assembly (22) comprises a slewing bearing (223), a second gear (222) and two first gears (221); The two first gears (221) are respectively connected to the output end of the driving assembly (21), and the two first gears (221) are both meshed with the second gear (222), and the second gear (222) is sleeved and fixed on the inner key sleeve (242); The inner ring of the slewing support body (223) is sleeved on the inner key sleeve (242) and arranged at intervals, and the slewing support body (223) is connected to the inner wall of the box body (241); The outer ring of the slewing bearing (223) is fixedly connected to the second gear (222).

5. The square pile hole drilling bit according to claim 4, characterized in that: The power mechanism (2) further includes a bearing (25); The bearing (25) is located in the housing (241), and the outer ring of the bearing (25) is connected to the housing (241); The bearing (25) is sleeved on the inner key sleeve (242), and the inner ring of the bearing (25) is connected to the inner key sleeve (242).

6. The square pile hole drilling bit according to claim 1, characterized in that: The cutting drum (3) comprises a drum body (31) and a plurality of pick seats (32) arranged on the drum body (31); A plurality of pick seats (32) are arranged on the outer surface and the outer end surface of the drum body (31); The sealing assembly (24) of the power mechanism (2) is located inside the drum body (31).

7. The square pile hole drilling bit according to claim 6, characterized in that: The cutting drum (3) further comprises a support plate (33) arranged in the drum body (31).

8. The square pile hole drilling bit according to claim 7, characterized in that: The cutting drum (3) further comprises an annular rib plate (35) and a plurality of triangular rib plates (34); The plurality of triangular rib plates (34) are arranged at intervals and the plurality of triangular rib plates (34) form a ring structure; The bottom end of the triangular rib plate (34) is connected to the support plate (33), and the side end of the triangular rib plate (34) is connected to the inner wall of the drum body (31); The annular rib plate (35) is arranged on the outer end surface of the drum body (31), and a plurality of pick seats (32) are arranged on the annular rib plate (35) at intervals.

9. The square pile hole drilling bit according to claim 1, characterized in that: The connecting bracket (1) comprises a top plate (11), two connecting columns (12) and two connecting plates (13); The top ends of the two connecting columns (12) are connected to the top plate (11), and the two connecting plates (13) are respectively connected to the two connecting columns (12) and the two connecting plates (13) are arranged opposite to each other; Both sides of the sealing components (24) of the two power mechanisms (2) are respectively connected to the two connecting plates (13).

10. The square pile hole drilling bit according to claim 9, characterized in that: The connecting bracket (1) further comprises a plurality of reinforcing ribs (14) arranged on the top plate (11).

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