CN210738479U - Drill bit for building piling hole - Google Patents

Abstract

The utility model belongs to the field of pile driving, in particular to a drill bit for building pile driving holes, which comprises an outer sleeve, a spiral plate A, a conical drill bit, an inner sleeve, a weight block, a limiting guide block, a spiral plate B and the like, wherein the spiral plate A is spirally arranged on the outer cylindrical surface of the outer sleeve along the central axis thereof; if the utility model meets a harder soil layer in the rotary digging process of the soil layer, the weight block in the utility model can be rapidly spirally lifted and vertically and rapidly dropped relative to the guide column in a reciprocating manner under the interaction of the limiting guide block and the spiral plate B, the inner sleeve is repeatedly impacted, and the impact generated by the impact finally forms substantial damage to the harder soil layer; when the harder soil layer is damaged, the utility model continues to carry out normal rotary digging on the soil layer; in whole work progress, need not change the drill bit just can realize continuing to carry out the drilling to the destruction of harder soil layer when the conical bit meets harder soil layer, and its work efficiency is higher, and the operation is simpler, need not consume more time and changes the drill bit.

Description

Drill bit for building piling hole

Technical Field

The utility model belongs to the pile field especially relates to a drill bit in building pile hole.

Background

In the process of high-rise buildings, a rotary excavating machine is needed to be used for drilling a pile hole and embedding a pile foundation; when the existing rotary digging machine excavates a pile hole, if a hard soil layer is encountered, a special down-the-hole drill needs to be replaced to carry out rotary digging on the hard soil layer; when the harder soil layer is drilled through, the common drill bit needs to be replaced again to continue rotary excavating; the method needs longer time for replacing the drill bit, and has lower rotary digging efficiency on the soil layer; there is a need for a drill bit that can break through harder soil layers without having to replace the drill bit when the harder soil layers are encountered. The utility model relates to a drill bit in building pile hole solves above problem.

SUMMERY OF THE UTILITY MODEL

In order to solve the above-mentioned defect among the prior art, the utility model discloses a drill bit in building pile hole, it adopts following technical scheme to realize.

In the description of the present invention, it should be noted that the terms "inside", "outside", "upper", "lower", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the utility model is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the equipment or element indicated must have a specific position, be constructed or operated in a specific position, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

The utility model provides a drill bit in building pile hole which characterized in that: the drill bit comprises an outer sleeve, a spiral plate A, a conical drill bit, an inner sleeve, a positioning ring, a spring A, a weight block, a limiting guide block, a spring B, a guide column, a spiral plate B, a swing plate A, a swing plate B, a volute spiral spring, a shifting plate and a spring C, wherein the spiral plate A is spirally arranged on the outer cylindrical surface of the outer sleeve along the central axis of the outer sleeve; the inner sleeve rotates and axially slides in the outer sleeve, and the inner sleeve is provided with a spring A for resetting the axial movement of the inner sleeve; the outer cylindrical surface of the inner sleeve is provided with a positioning ring, and the positioning ring rotates and axially slides in a ring groove A on the inner wall of the outer sleeve; a square weight block vertically slides in the square sliding groove A on the upper end surface of the inner sleeve, and the central axis of the through round movable groove between the upper end surface and the lower end surface of the weight block is superposed with the central axis of the outer sleeve; the weight block is provided with a spring C for resetting the weight block; a limiting guide block is horizontally moved in a sliding groove B on the inner wall of the movable groove, and a spring B for resetting the limiting guide block is arranged on the limiting guide block; one end of the limiting guide block is provided with an inclined plane.

The guide column is arranged at the center of the top in the outer sleeve, and a spiral plate B is spirally arranged on the cylindrical surface of the guide column along the central axis of the cylindrical surface; the lower end of the spiral plate B is provided with a shifting plate matched with the inclined plane end of the limiting guide block; the rotating spiral plate B drives the heavy block to vertically move upwards along the sliding groove A through the interaction with the limiting guide block which passes over the shifting plate; the spiral plate B is provided with a notch A and a notch B, the notch A is positioned at the uppermost end of the spiral plate B, and the notch B is positioned below the notch A and penetrates through the whole spiral plate B downwards along the central axis of the spiral plate B; the limiting guide block is matched with the notch A and the notch B.

The swinging plate A and the swinging plate B swing oppositely or reversely in the notch B on each circle of the spiral plate B; the swinging plate A and the swinging plate B which are positioned in the same cut B close and open the corresponding cut B; the swing plate A is in transmission connection with the swing plate B; the swinging plate A and the swinging plate B which close the notch B enable the limiting guide block which spirally rises relative to the guide column to smoothly cross the corresponding notch B; a volute spiral spring for resetting the swing plate A is arranged on the swing plate A; the relative wall surfaces of the swing plate A and the swing plate B in a vertical state in each notch B are respectively matched with two side surfaces of the limiting guide block, the swing plate A and the swing plate B are respectively matched with two relative inner walls in the corresponding notches B, the limiting guide block is ensured to vertically move downwards relative to the guide column in the process, the swing plate B in the notch B below blocks the guide block in the rotation mode relative to the guide column, the swing plate B cannot swing towards the direction far away from the limiting guide block under the action of the falling limiting guide block, the swing plate A and the swing plate B in the notch B below play a role in guiding the vertical downward limiting guide block passing through the notch B, and the limiting guide block smoothly vertically passes through the notch B below and finally reaches the lowest end of the spiral plate B.

The lower end of the inner sleeve is provided with a conical drill bit with the same central axis as the inner sleeve, and a plurality of tip protrusions are uniformly distributed on the conical surface of the conical drill bit.

As a further improvement of the technology, two damping blocks are symmetrically arranged at the cone tip of the cone bit. When the conical drill bit encounters a harder stone or soil layer, the two damping blocks interact with the harder stone or soil layer to enable the conical drill bit to stop rotating temporarily, the continuously rotating outer sleeve drives the shifting plate to rotate relative to the limiting guide block through the guide column and the spiral plate B, and the shifting plate acts on the inclined surface of the limiting guide block to enable the limiting guide block to contract along the sliding groove B and gradually contact with the inclined surface to limit the shifting plate; when the spacing guide block crosses the shifting plate, the spacing guide block drives the heavy block to spirally rise along the plate surface of the spiral plate B under the action of the rotating spiral plate B.

As a further improvement of the technology, the spring a is nested on the inner sleeve and is positioned in the annular groove a; the upper end of the spring A is connected with the positioning ring, and the lower end of the spring A is connected with the inner wall of the annular groove A. Spring A's effect is guaranteed that conical bit can not produce relative motion for the overcoat under initial condition for the holding ring is in spout A's top at initial condition, guarantees the utility model discloses when beginning to carry out the drilling to the soil layer, the overcoat can directly form fast to endotheca and conical bit through the holding ring and exert pressure, makes conical bit form substantive drilling fast to the soil layer.

As a further improvement of the technology, the inner wall of the sliding chute B is symmetrically provided with two guide grooves, and the side surface of the limiting guide block is symmetrically provided with two guide blocks; the two guide blocks horizontally slide in the two guide grooves respectively; the spring B is positioned in the sliding groove B and is always in a compressed state; one end of the spring B is connected with the end face of the limiting guide block, and the other end of the spring B is connected with the inner wall of the sliding groove B. The cooperation of the guide groove and the guide block ensures that the spring B can be always in a compressed state; the spring B which is always in a compression state enables the outer sleeve to drive the heavy block to synchronously rotate through the guide column, the spiral plate B, the shifting plate and the limiting guide block, and the heavy block drives the conical drill bit inner sleeve to synchronously rotate in a soft soil layer.

As a further improvement of the technology, the spring C is nested on a guide column provided with a spiral plate B, and the spiral plate B is positioned in the spring C; one end of the spring C is connected with the top in the outer sleeve, and the other end of the spring C is in contact fit with the upper end face of the weight block, so that the weight block can move upwards relative to the guide column under the guidance of the spiral plate B, and the spring C is compressed by the weight block and cannot interfere with the relative rotation of the outer sleeve and the inner sleeve; the spring C is always in a compressed state.

As the further improvement of this technique, the limiting plate that the corresponding swing board A of restriction and swing board B continued the lower hem is installed to above-mentioned incision B's inner wall downside, and the limiting plate makes swing board A and swing board B provide the guide rail for the spacing guide block through corresponding incision B when restricting swing board A and swing board B and continue the lower hem, guarantees that spacing guide block passes through corresponding incision B smoothly. Two sides of the limiting guide block are respectively matched with a swing plate A and a swing plate B in a vertical state, the limiting guide block is ensured to fall downwards from a notch A in a quick falling process, the limiting guide block is positioned before the notch B which is separated from the upper side, the lower parts of the two sides of the limiting guide block are positioned between the swing plate A and the swing plate B in the vertical state, the lower parts of the two sides of the limiting guide block are positioned between the swing plate A and the swing plate B in the lower side, after the limiting guide block is separated from the notch B in the upper side, the swinging plate A and the swing plate B in the lower side continue to move downwards quickly relative to the guide column, and the heavy block finally reaches the bottom.

As a further improvement of the technology, a gear A is rotated on a swing pin on which the swing plate A is positioned, and the gear A is fixedly connected with the swing plate A; a gear D is rotatably arranged on a swing pin on which the swing plate B is arranged, and is fixedly connected with the swing plate B; the gear A is meshed with a gear B arranged on the inner wall of the notch B, and the gear B is meshed with a gear C arranged on the inner wall of the notch B; the gear D is meshed with a gear E arranged on the inner wall of the notch B, and the gear E is meshed with a gear F arranged on the inner wall of the notch B; the central connecting line among the gear A, the gear B, the gear C, the gear D, the gear E and the gear F is parallel to the central connecting line of the swing pin where the swing plate A is located and the swing pin where the swing plate B is located; a space is reserved between the gear F and the gear C; the rack A and the rack B slide on the inner wall of the notch B in parallel; the rack A is meshed with the upper end of the gear C, and the rack B is meshed with the lower end of the gear F; the rack A and the rack B are connected through a connecting block.

As a further improvement of the technology, the transmission ratio of the gear A to the gear C is greater than 1, and the transmission ratio of the gear B to the gear C is greater than 1, so that the rack A is only meshed with the gear C, and the phenomenon of locking of the rack A due to the fact that the rack A is meshed with the gear A, the gear B and the gear C simultaneously is avoided; the transmission ratio of the gear D to the gear F is greater than 1, and the transmission ratio of the gear E to the gear F is greater than 1, so that the situation that the rack B is only meshed with the gear D and is not locked due to the fact that the rack A is meshed with the gear D, the gear E and the gear F at the same time is avoided; the transmission ratio of the gear C to the gear F is equal to 1, the transmission ratio of the gear A to the gear D is less than 1, the position height of the swing plate A on the spiral plate B is less than the position height of the swing plate B on the spiral plate B, the swing angles of the swing plate A and the swing plate B when swinging to the surface of the spiral plate B around the corresponding swing pins to close the corresponding notches B are different, and the swing angle of the swing plate A is less than the swing angle of the swing plate B, so that the transmission ratio of the gear C to the gear F is equal to 1, and the transmission ratio of the gear A to the gear D is less than 1, so that under the condition that the moving distances of the rack A and the rack B are equal, the angular speed of the gear A rotating through a series of moving gear D is increased, further the swing speed of the swing plate B is greater than the swing speed of the swing plate A, further, when the swing plate A and the swing plate B swing to the surface of the spiral plate B around the corresponding swing pins to close the corresponding notches, the swing angle of the swing plate A is smaller than that of the swing plate B; a trapezoidal guide block A is arranged on the rack A, and a trapezoidal guide block B is arranged on the rack B; the trapezoid guide block A and the trapezoid guide block B slide in the trapezoid guide groove A and the trapezoid guide groove B on the inner wall of the corresponding notch B respectively. The cooperation of trapezoidal guide block A and trapezoidal guide slot A plays the positioning and guiding effect to the motion of rack A, and the cooperation of trapezoidal guide block B and trapezoidal guide slot B plays the positioning and guiding effect to the motion of rack B.

As a further improvement of the technology, the inner wall of the swing hole on the swing plate A, which is rotatably matched with the swing pin on which the swing plate A is arranged, is circumferentially provided with a ring groove B; the volute spiral spring is nested on the swing pin on which the swing plate A is positioned, and the volute spiral spring is positioned in the annular groove B; one end of the volute spiral spring is connected with the swing pin, and the other end of the volute spiral spring is connected with the inner wall of the ring groove B.

As a further improvement of the technology, the distance between two opposite wall surfaces in the notch a is smaller than the distance between opposite plate surfaces on the swing plate a and the swing plate B in a vertical state; the wall surface of the notch B matched with the swing plate B is coplanar with the plate surface of the shifting plate matched with the limiting guide block; the height of the shifting plate is more than one half of the pitch of the spiral plate B; the height of the limiting guide block is greater than one half of the pitch of the spiral plate B; the height of the limiting guide block and the sum of the length of the swing plate A are larger than the pitch of the spiral plate B, the height of the limiting guide block and the sum of the length of the swing plate B are larger than the pitch of the spiral plate B, the distance between the two side faces of the limiting guide block is smaller than the distance between the two opposite side walls of the notch A, and when the limiting guide block is guaranteed to fall downwards quickly from the notch A, the limiting guide block is always located between the swing plate A and the swing plate B which are in a vertical state in each notch B, and the limiting guide block can fall and reset smoothly and quickly. The surface matched with the spiral plate B on the limiting guide block is a spiral surface and is smooth, the lead angle of the spiral surface on the limiting guide block is equal to that of the spiral plate B, and good matching of the limiting guide block and the spiral plate B is guaranteed.

The utility model discloses in to the rational design of pendulum board B along the length of its place pendulum pin direction to and the rational design on spacing guide block inclined plane to when guaranteeing that spacing guide block glides in incision B, pendulum board B makes spacing guide block follow pendulum board B synchronous revolution through the side of stirring spacing guide block.

Compared with the traditional pile hole drilling bit, if the utility model meets a harder soil layer in the rotary digging process of the soil layer, the weight block in the utility model can be rapidly spirally raised in a reciprocating way relative to the guide column and vertically and rapidly fall along the notch A and the notch B under the interaction of the limiting guide block and the spiral plate B, the inner sleeve is repeatedly impacted, and the impact generated by the impact finally forms substantial damage to the harder soil layer through the conical drilling bit, so that the harder soil layer is broken; when the harder soil layer is damaged, the utility model continues to carry out normal rotary digging on the soil layer; in the whole construction process, the conical drill can continuously drill the soil layer without replacing the drill when encountering the harder soil layer, the working efficiency is higher, the operation is simpler, and the drill does not need to be replaced by more time; the utility model discloses simple structure has better result of use.

Drawings

Fig. 1 is a schematic cross-sectional view of the drill as a whole.

Fig. 2 is a schematic cross-sectional view of the jacket and the spiral plate a in cooperation.

FIG. 3 is a cross-sectional view of the spiral plate A, the outer sleeve, the positioning ring and the inner sleeve.

FIG. 4 is a schematic cross-sectional view of the outer sleeve, cone bit, inner sleeve and weight engagement.

FIG. 5 is a cross-sectional view of the retaining ring, inner sleeve and cone drill bit.

FIG. 6 is a schematic cross-sectional view of the weight, the limiting and guiding block, the shifting plate, the spiral plate B and the guiding column.

Fig. 7 is a schematic cross-sectional view of a weight and its components.

FIG. 8 is a schematic diagram of the combination of the position-limiting guide block, the shifting plate, the spiral plate B, the swing plate A and the swing plate B.

FIG. 9 is a cross-sectional view of the swing plate A, the swing plate B and the spiral plate B.

FIG. 10 is a cross-sectional view of the rack A, the gear B, the gear C, the connecting block, the rack B, the gear F, the gear E, the gear D and the spiral plate B.

FIG. 11 is a cross-sectional view of the swing plate A, gear B, gear C, spiral plate B, swing plate B, gear D, gear E and gear F.

Fig. 12 is a schematic view of a spiral plate B and a part thereof.

Fig. 13 is a cross-sectional view of the engagement of the rack bar a with the spiral plate B and the engagement of the rack bar B with the spiral plate B.

The name of the winning symbol: 1. a jacket; 2. a ring groove A; 3. a spiral plate A; 4. a conical drill bit; 5. a tip protrusion; 6. a damping block; 7. an inner sleeve; 8. a chute A; 9. a positioning ring; 10. a spring A; 11. a weight block; 12. a movable groove; 13. a chute B; 14. a guide groove; 15. a limiting guide block; 16. a guide block; 17. a spring B; 18. a guide post; 19. a spiral plate B; 20. a notch A; 21. a notch B; 22. a trapezoidal guide groove A; 23. a trapezoidal guide groove B; 24. dialing a plate; 25. a rack A; 26. a rack B; 27. connecting blocks; 28. a limiting plate; 29. a gear A; 30. a swinging plate A; 31. a ring groove B; 32. a volute spiral spring; 33. a gear B; 34. a gear C; 35. a gear D; 36. a swinging plate B; 37. a gear E; 38. a gear F; 39. a spring C; 40. a trapezoidal guide block A; 41. and a trapezoidal guide block B.

Detailed Description

The attached drawings are schematic diagrams of the implementation of the present invention in order to understand the structural operation principle. The specific product structure and the proportional size are determined according to the use environment and the conventional technology.

As shown in fig. 1, it comprises an outer sleeve 1, a spiral plate A3, a conical drill bit 4, an inner sleeve 7, a positioning ring 9, a spring a10, a weight 11, a limit guide block 15, a spring B17, a guide column 18, a spiral plate B19, a swing plate a30, a swing plate B36, a spiral spring 32, a dial plate 24 and a spring C39, wherein as shown in fig. 2, the spiral plate A3 is spirally mounted on the outer cylindrical surface of the outer sleeve 1 along the central axis thereof; as shown in fig. 1, 3 and 4, the inner sleeve 7 rotates and axially slides in the outer sleeve 1, and the inner sleeve 7 is provided with a spring a10 for restoring the axial movement of the inner sleeve; as shown in fig. 2, 3 and 5, the positioning ring 9 is mounted on the outer cylindrical surface of the inner sleeve 7, and the positioning ring 9 rotates and axially slides in the annular groove a2 on the inner wall of the outer sleeve 1; as shown in fig. 4 and 5, a square weight 11 vertically slides in the square sliding groove A8 on the upper end surface of the inner sleeve 7; as shown in fig. 4 and 7, the central axis of the through circular movable groove 12 between the upper end surface and the lower end surface of the weight 11 is coincident with the central axis of the jacket 1; as shown in fig. 4 and 5, the weight 11 is provided with a spring C39 for returning the weight; as shown in fig. 6 and 7, a limit guide block 15 horizontally moves in a sliding groove B13 on the inner wall of the movable groove 12, and a spring B17 for resetting the limit guide block 15 is installed on the limit guide block 15; the limit guide block 15 has an inclined surface at one end.

As shown in fig. 1 and 4, the guide post 18 is installed at the center of the top in the jacket 1, and a spiral plate B19 is spirally installed on the cylindrical surface of the guide post 18 along the central axis thereof; as shown in fig. 8 and 12, the lower end of the spiral plate B19 is provided with a shifting plate 24 which is matched with the inclined end of the limit guide block 15; the rotating spiral plate B19 drives the weight 11 to move vertically upwards along the sliding groove A8 through the interaction with the limit guide block 15 crossing the shifting plate 24; as shown in fig. 12, the spiral plate B19 has a cut a20 and a cut B21, the cut a20 is located at the uppermost end of the spiral plate B19, and the cut B21 is located below the cut a20 and penetrates the entire spiral plate B19 downward along the central axis of the spiral plate B19; as shown in fig. 8, the stop guide block 15 is fitted with the notch a20 and the notch B21.

As shown in fig. 9, the notches B21 on each circle of the spiral plate B19 are provided with a swinging plate a30 and a swinging plate B36 which swing towards or away from each other; the swinging plate A30 and the swinging plate B36 which are positioned in the same notch B21 close and open the corresponding notch B21; as shown in fig. 9, 10 and 11, the swing plate a30 is in transmission connection with the swing plate B36; the swing plate a30 and the swing plate B36 closing the slit B21 allow the position restricting guide piece 15 spirally rising with respect to the guide post 18 to smoothly pass over the corresponding slit B21; as shown in fig. 9 and 11, a scroll spring 32 for returning the swing plate a30 is mounted thereon; as shown in fig. 8, opposite wall surfaces of the swing plate a30 and the swing plate B36 in a vertical state in each notch B21 are respectively matched with two side surfaces of the limit guide block 15, the swing plate a30 and the swing plate B36 are respectively matched with two opposite inner walls in the corresponding notch B21, so that during the vertical downward movement of the limit guide block 15 relative to the guide post 18, the swing plate B36 in the lower notch B21 blocks the rotation of the guide block relative to the guide post 18, the swing plate B36 cannot swing away from the limit guide block 15 under the action of the falling limit guide block 15, the swing plate a30 and the swing plate B36 in the lower notch B21 guide the limit guide block 15 passing through the notch B21 vertically downward, and the limit guide block 15 smoothly passes through the lower notch B21 and finally reaches the lowest end of the spiral plate B19 vertically.

As shown in fig. 1 and 4, the lower end of the inner sleeve 7 is provided with a conical drill 4 having the same central axis with the inner sleeve, and a plurality of tip protrusions 5 are uniformly distributed on the conical surface of the conical drill 4.

As shown in fig. 5, two damping blocks 6 are symmetrically installed at the tip of the cone bit 4. When the conical drill bit 4 encounters a harder stone or soil layer, the two damping blocks 6 interact with the harder stone or soil layer, so that the conical drill bit 4 stops rotating temporarily, the continuously rotating outer sleeve 1 drives the shifting plate 24 to rotate relative to the limiting guide block 15 through the guide column 18 and the spiral plate B19, and the shifting plate 24 acts on the inclined surface of the limiting guide block 15, so that the limiting guide block 15 contracts along the sliding groove B13 and gradually contacts with the inclined surface to limit the shifting plate 24; when the limit guide block 15 passes over the shifting plate 24, the weight 11 is driven by the limit guide block 15 to spirally rise along the plate surface of the spiral plate B19 under the action of the rotating spiral plate B19.

As shown in fig. 2 and 3, the spring a10 is nested on the inner sleeve 7 and is located in the ring groove a 2; the upper end of the spring A10 is connected with the positioning ring 9, and the lower end is connected with the inner wall of the ring groove A2. Spring A10's effect is guaranteed that conical bit 4 can not produce relative motion for overcoat 1 under initial condition for holding ring 9 is in spout A8's top at initial condition, guarantees the utility model discloses when beginning to carry out the drilling to the soil layer, overcoat 1 can directly form fast to endotheca 7 and conical bit 4 through holding ring 9 and exert pressure, makes conical bit 4 form substantive drilling fast to the soil layer.

As shown in fig. 7, two guide grooves 14 are symmetrically formed on the inner wall of the sliding groove B13; as shown in fig. 6 and 8, two guide blocks 16 are symmetrically arranged on the side surface of the limiting guide block 15; the two guide blocks 16 respectively slide in the two guide grooves 14 horizontally; the spring B17 is positioned in the sliding groove B13, and the spring B17 is always in a compressed state; one end of the spring B17 is connected with the end face of the limit guide block 15, and the other end is connected with the inner wall of the sliding groove B13. The cooperation of the guide slot 14 and the guide block 16 ensures that the spring B17 can be always in a compressed state; the spring B17 which is always in a compressed state enables the outer sleeve 1 to drive the weight 11 to synchronously rotate through the guide column 18, the spiral plate B19, the shifting plate 24 and the limiting guide block 15, and the weight 11 and the inner sleeve 7 of the conical drill bit 4 are driven to synchronously rotate in a soft soil layer.

As shown in fig. 1, 3 and 4, the spring C39 is nested on the guide post 18 mounted with the spiral plate B19, and the spiral plate B19 is located in the spring C39; one end of the spring C39 is connected with the top of the outer sleeve 1, and the other end of the spring C39 is in contact fit with the upper end face of the weight 11, so that the weight 11 can move upwards relative to the guide post 18 under the guidance of the spiral plate B19, and the spring C39 is compressed by the weight 11 and cannot interfere with the relative rotation of the outer sleeve 1 and the inner sleeve 7; the spring C39 is always in compression.

As shown in fig. 9, 10 and 11, a limit plate 28 for limiting the respective swing plate a30 and swing plate B36 to swing downwards continuously is mounted on the lower side of the inner wall of the notch B21, and the limit plate 28 limits the swing plate a30 and swing plate B36 to swing downwards continuously, and at the same time, the limit plate a30 and swing plate B36 provide a guide rail for the limit guide block 15 passing through the respective notch B21, so as to ensure that the limit guide block 15 passes through the respective notch B21 smoothly. Two side surfaces of the limiting guide block 15 are respectively matched with the swing plate A30 and the swing plate B36 in a vertical state, so that in the process that the limiting guide block 15 falls downwards from the notch A20 quickly, before the limiting guide block 15 is separated from the notch B21 above, the lower parts of the two side surfaces of the limiting guide block 15 are already positioned between the swing plate A30 and the swing plate B36 in the vertical state below, after the limiting guide block 15 is separated from the notch B21 above, the limiting guide block continues to move downwards quickly and vertically relative to the guide column 18 under the guide of the swing plate A30 and the swing plate B36 below, and the weight 11 finally reaches the bottom of the sliding groove A8 of the inner sleeve 7 and impacts the bottom of the inner sleeve 7.

As shown in fig. 11, the swing pin on which the swing plate a30 is located rotates a gear a29, and the gear a29 is fixedly connected with the swing plate a 30; a gear D35 is rotatably arranged on a swing pin on which the swing plate B36 is arranged, and the gear D35 is fixedly connected with the swing plate B36; as shown in fig. 10 and 11, the gear a29 is meshed with the gear B33 mounted on the inner wall of the notch B21, and the gear B33 is meshed with the gear C34 mounted on the inner wall of the notch B21; the gear D35 is meshed with a gear E37 arranged on the inner wall of the notch B21, and the gear E37 is meshed with a gear F38 arranged on the inner wall of the notch B21; the central connecting line between the gear A29, the gear B33, the gear C34, the gear D35, the gear E37 and the gear F38 is parallel to the central connecting line of a swing pin where the swing plate A30 is located and a swing pin where the swing plate B36 is located; the gear F38 and the gear C34 are spaced; the rack A25 and the rack B26 slide on the inner wall of the notch B21 in parallel; the rack A25 is meshed with the upper end of the gear C34, and the rack B26 is meshed with the lower end of the gear F38; the rack A25 is connected with the rack B26 through a connecting block 27.

As shown in fig. 10 and 11, the transmission ratio of the gear a29 to the gear C34 is greater than 1, and the transmission ratio of the gear B33 to the gear C34 is greater than 1, so that the rack a25 is only meshed with the gear C34, and the phenomenon that the rack a25 is meshed with the gear a29, the gear B33 and the gear C34 at the same time to cause the rack a25 to be jammed in movement is avoided; the transmission ratio of the gear D35 to the gear F38 is greater than 1, the transmission ratio of the gear E37 to the gear F38 is greater than 1, and the fact that the rack B26 is only meshed with the gear D35 is guaranteed, and the phenomenon that the rack B26 is locked due to the fact that the rack A25 is meshed with the gear D35, the gear E37 and the gear F38 at the same time is avoided; the transmission ratio of the gear C34 to the gear F38 is equal to 1, the transmission ratio of the gear a29 to the gear D35 is less than 1, the height of the position of the swing plate a30 on the spiral plate B19 is less than the height of the position of the swing plate B36 on the spiral plate B19, the swing angles of the swing plate a30 and the swing plate B36 respectively swing around the corresponding swing pins to the plate surface of the spiral plate B19 to close the corresponding notches B21 are different, the swing angle of the swing plate a30 is less than the swing angle of the swing plate B36, so the transmission ratio of the gear C34 to the gear F38 is equal to 1, the transmission ratio of the gear a 38 to the gear D38 is less than 1, and under the condition that the moving distances of the rack a 38 and the rack B38 are equal, the angular speed of the gear a 38 rotating through the series of the transmission gear D38 is increased, and the swing speed of the swing plate B38 is greater than the swing speed of the swing plate a 38 and further, when the swing plate a 38 and the corresponding notches B38 close the corresponding notches B38, the swing angle of the swing plate A30 is smaller than that of the swing plate B36; as shown in fig. 13, a trapezoidal guide block a40 is mounted on the rack a25, and a trapezoidal guide block B41 is mounted on the rack B26; as shown in fig. 12 and 13, the trapezoidal guide blocks a40 and B41 slide in the trapezoidal guide grooves a22 and B23 on the inner walls of the corresponding notches B21, respectively. The cooperation of trapezoidal guide block A40 and trapezoidal guide groove A22 plays a role in positioning and guiding the movement of rack A25, and the cooperation of trapezoidal guide block B41 and trapezoidal guide groove B23 plays a role in positioning and guiding the movement of rack B26.

As shown in fig. 9 and 11, the inner wall of the pendulum hole of the pendulum plate a30, which is rotatably engaged with the pendulum pin, is circumferentially provided with a ring groove B31; the scroll spring 32 is nested on the swing pin on which the swing plate A30 is positioned, and the scroll spring 32 is positioned in the ring groove B31; one end of the spiral spring 32 is connected with the swing pin, and the other end is connected with the inner wall of the ring groove B31.

As shown in fig. 8 and 12, the distance between two opposite wall surfaces in the notch a20 is smaller than the distance between the opposite plate surfaces of the swing plate a30 and the swing plate B36 in the vertical state; the wall surface of the notch B21 matched with the swinging plate B36 is coplanar with the plate surface of the matching limit guide block 15 on the shifting plate 24; the height of the shifting plate 24 is more than one half of the thread pitch of the spiral plate B19; the height of the limiting guide block 15 is more than one half of the screw pitch of the spiral plate B19; the sum of the height of the limiting guide block 15 and the length of the swing plate A30 is larger than the screw pitch of the spiral plate B19, the sum of the height of the limiting guide block 15 and the length of the swing plate B36 is larger than the screw pitch of the spiral plate B19, the distance between two side faces of the limiting guide block 15 is smaller than the distance between two opposite side walls in the notch A20, and when the limiting guide block 15 falls downwards from the notch A20 quickly, the limiting guide block 15 is always located between the swing plate A30 and the swing plate B36 in a vertical state in each notch B21, and the limiting guide block 15 can fall and reset smoothly and quickly. The surface matched with the spiral plate B19 on the limiting guide block 15 is a spiral surface and is smooth, the lead angle of the spiral surface on the limiting guide block 15 is equal to the lead angle of the spiral plate B19, and good matching of the limiting guide block 15 and the spiral plate B19 is guaranteed.

The utility model discloses well most advanced is protruding 5 to be favorable to the drill bit to break through the soil layer.

The utility model discloses install on digging the rotation axis that the machine is used for the hole of driving a pile soon, dig the rotation axis drive overcoat 1 that is used for the hole of driving a pile on the machine soon and rotate.

The utility model discloses well most advanced protruding 5 all adopts high strength material to make with damping piece 6, guarantees that it is difficult to be damaged by wearing and tearing and durable.

The utility model discloses a work flow: in the initial state, retaining ring 9 is positioned on top of groove A2, and both spring B17 and spring C39 are in compression; the weight 11 is positioned at the bottom of the sliding chute A8, and the two guide blocks 16 are respectively positioned at the extreme positions of the two guide grooves 14; the inclined end of the limiting guide block 15 is positioned in the movable groove 12 on the weight 11; the lower end of the spiral plate B19 is positioned in the movable groove 12, the shifting plate 24 is contacted with the end inclined surface of the limit guide block 15, and the swinging plate A30 and the swinging plate B36 are in a vertical state.

When the utility model is used for rotary digging pile hole, the rotary shaft of the rotary digging machine applies pressure to the outer sleeve 1, so that the outer sleeve 1 drives the inner sleeve 7 and the conical drill bit 4 to press to the ground through the positioning ring 9; meanwhile, a rotating shaft used for driving a pile hole in the rotary drilling machine drives the outer sleeve 1 to rotate, the outer sleeve 1 drives the spiral plate A3 and the guide column 18 to synchronously rotate, the guide column 18 drives all components arranged on the guide column to synchronously rotate, and the shifting plate 24 acts on the inclined plane of the limiting guide block 15; if the rotary-digging soil layer is soft, the shifting plate 24 can drive the heavy block 11 to synchronously rotate through the limiting guide block 15; the inner sleeve 7 is driven by the weight 11 to synchronously rotate, the conical drill bit 4 is driven by the inner sleeve 7 to synchronously rotate, the drill bit drives the plurality of tip protrusions 5 and the two damping blocks 6 to synchronously rotate, and the plurality of tip protrusions 5 perform rotary drilling on the soil layer; the utility model continuously moves to the underground under the pressure of the rotary digging machine along with the continuous rotary drilling of the conical drill bit 4 to the soil layer; the spiral plate a3 rotating synchronously with the casing 1 conveys upward the soil drilled by the tip protrusions 5 on the cone bit 4.

When the conical drill bit 4 continuously moving downwards encounters a harder soil layer or a harder stone, the two damping blocks 6 interact with the harder soil layer or the harder stone due to the existence of the two damping blocks 6 at the conical tip of the conical drill bit 4, the rotation of the conical drill bit 4 is temporarily stopped, the conical drill bit 4 stops rotating, the inner sleeve 7 stops rotating, the weight 11 stops rotating, and the limiting guide block 15 stops rotating; the stopped conical drill bit 4 does not carry out rotary drilling on the soil layer, and the rotating shaft of the rotary excavator still drives the outer sleeve 1 to continuously rotate at the moment; the outer sleeve 1 drives the spiral plate A3 and the guide post 18 to continuously rotate; the spiral plate A3 continuously conveys and cleans the soil below the pile hole upwards and outwards; the guide column 18 drives the spiral plate B19 and the shifting plate 24 to continue rotating, the shifting plate 24 acts on the inclined surface of the limiting guide block 15, so that the limiting guide block 15 contracts along the sliding groove B13 on the inner wall of the weight 11 and quickly releases the limitation on the shifting plate 24, and the spring B17 is further compressed and stores energy; when the limit guide block 15 passes over the shifting plate 24, under the reset action of the spring B17, the limit guide block 15 is reset instantly and enters between the spiral gaps of the spiral plates; along with the rotation of the spiral plate B19, the spiral plate B19 drives the limit guide block 15 to spirally ascend relative to the guide column 18 along the spiral plate surface of the spiral plate B19; the weight 11 is driven by the limit guide block 15 to move vertically upwards along the sliding groove A8 of the inner sleeve 7, and the spring C39 is further compressed and stores energy.

In the process that the limiting guide block 15 spirally rises along the spiral plate surface of the spiral plate B19, when the limiting guide block 15 meets the vertical swing plate A30 in the notch B21, the limiting guide block 15 pushes the swing plate A30, so that the swing plate A30 swings around a swing pin into the notch B21 and the blocking of the limiting guide block 15 is released; the swing plate A30 drives the gear A29 in the corresponding notch B21 to synchronously rotate, the gear A29 drives the corresponding gear B33 to rotate, the gear B33 drives the corresponding gear C34 to rotate, and the gear C34 drives the rack A25 to move towards the direction of the swing plate B36; the rack A25 drives the rack B26 to move synchronously through the connecting block 27; the rack B26 drives the gear F38 to rotate, the gear F38 drives the gear E37 to rotate, the gear E37 drives the gear D35 to rotate, and the rotary valve direction of the gear D35 is opposite to the rotary direction of the gear A29; the gear D35 drives the swing plate B36 to swing towards the corresponding notch B21, the swing plate B36 swings in opposite directions with the swing plate A30, and the scroll spring 32 compresses and stores energy; when the swing plate A30 and the swing plate B36 swing into the notch B21, the limit plate 28 prevents the swing plate A30 and the swing plate B36 from continuing to swing downwards, and at the moment, the swing plate A30 and the swing plate B36 completely close the notch B21 and provide a guide rail for the limit guide block 15 to pass through the notch B21; the limiting guide block 15 quickly passes through the swinging plate A30 and the swinging plate B36 and goes over the notch B21 to continuously rise spirally along the spiral plate surface of the spiral plate B19; when the limiting guide block 15 is completely separated from the swing plate B36, under the reset action of the volute spiral spring 32, the swing plate a30 swings back to the vertical state quickly, and the swing plate a30 passes through the gear a29, the gear B33, the gear C34, the rack a25, the connecting block 27, the rack B26, the gear F38, the gear E37 and the gear D35 to drive the swing plate B36 to swing back to the vertical state quickly; the stop guide 15 quickly passes through each notch B21 and finally reaches the notch a20 during the screwing up process as described above, the amount of compression of the spring C39 reaches its maximum, and the weight 11 moves up the slide groove a8 to the limit position.

When the limit guide block 15 completely enters the notch A20, the limit guide block 15 rapidly moves vertically downwards along the notch A20 relative to the guide post 18 under the reset action of the spring C39; before the limiting guide block 15 is completely separated from the notch A20, the lower end part of the limiting guide block 15 enters the swing plate A30 and the swing plate B36 in the notch B21 below, under the continuous guide of the swing plate A30 and the swing plate B36, the swing plate B36 stirs the side surface of the limiting guide block 15, and the limiting guide block 15 continues to vertically and downwards move quickly relative to the guide column 18 along the notch B21; in the process that the swing plate B36 stirs the side face of the limiting guide block 15, the side face of the notch B shields the swing plate B36 from moving away from the center of the notch B, so that the swing plate B36 can stir the side face of the limiting guide block 15; in the process that the limiting guide block 15 vertically moves downwards relative to the guide column 18, the continuously rotating spiral plate B19 drives the limiting guide block 15 to synchronously rotate the spiral plate B19 through the swinging plate B36 in the cut A20 or the cut B21 below, the limiting guide block 15 drives the weight 11 to synchronously rotate, the weight 11 drives the inner sleeve 7 to synchronously rotate, the inner sleeve 7 drives the conical drill bit 4 to synchronously rotate, the conical drill bit 4 drives the two damping blocks 6 to overcome the obstruction of a harder soil layer on the conical drill bit 4 and rotate relative to the soil layer, and the conical drill bit 4 starts to spin-drill the harder soil layer again; however, the re-rotating cone 4 is simply rotated relative to the harder earth and does not provide substantial drilling of the harder earth.

When the limiting guide block 15 sequentially passes through the plurality of notches B21 from top to bottom and finally quickly reaches the lowest end of the spiral plate B19, the inclined surface on the limiting guide block 15 is contacted with the shifting plate 24 again, the weight 11 quickly collides with the bottom of the sliding groove A8 of the inner sleeve 7, and the weight 11 and the inner sleeve 7 mutually collide, so that the conical drill bit 4 drives the two damping blocks 6 to quickly impact and damage the harder soil layer, and the harder soil layer is cracked; cracked harder soil layer can not form the hindrance to conical bit 4, and the guide post 18 that lasts rotatory this moment continues to drive pouring weight 11 synchronous revolution through dialling board 24 and spacing guide block 15, and pouring weight 11 continues to drive endotheca 7 synchronous revolution, and endotheca 7 continues to drive conical bit 4 synchronous revolution and drills to cracked harder soil layer.

If the impact generated when the weight 11 quickly falls to the bottom of the sliding groove A8 of the inner sleeve 7 for the first time is not enough to substantially damage the harder soil layer, the harder soil layer forms a barrier for the conical drill bit 4 again under the pressure of the rotary excavator, the conical drill bit 4 stops rotating again temporarily, and the outer sleeve 1 continues to rotate under the driving of the rotary excavator rotating shaft; the outer sleeve 1 drives all the components arranged on the guide post 18 to continuously and synchronously rotate through the guide post 18; the shifting plate 24 shifts the limiting guide block 15 again, so that the limiting guide block 15 contracts along the sliding groove B13, and the spring B17 is further compressed and stores energy again; the operation flow is as described above, and is not described herein again. Until the harder soil layer is cracked under the impact of the heavy blocks 11 and the inner sleeve 7 for a plurality of times; cracked harder soil layer can not form the hindrance to conical bit 4, and the guide post 18 that lasts rotatory this moment continues to drive pouring weight 11 synchronous revolution through dialling board 24 and spacing guide block 15, and pouring weight 11 continues to drive endotheca 7 synchronous revolution, and endotheca 7 continues to drive conical bit 4 synchronous revolution and drills to cracked harder soil layer.

The utility model discloses utilize pouring weight 11 to carry out the substantive destruction to the harder soil layer of certain degree within range to the impact of endotheca 7, bore the effectual of digging a hole soon than traditional down-the-hole.

To sum up, the utility model has the advantages that: if the utility model meets harder soil layer in the rotary digging process of the soil layer, the weight block 11 can be rapidly spirally raised in a reciprocating way relative to the guide column 18 and vertically and rapidly fall along the notch A20 and the notch B21 under the interaction of the limiting guide block 15 and the spiral plate B19, the inner sleeve 7 is repeatedly impacted, and the impact generated by the impact finally forms substantial damage to the harder soil layer through the conical drill bit 4, so that the harder soil layer is broken; when the harder soil layer is damaged, the utility model continues to carry out normal rotary digging on the soil layer; in whole work progress, need not change the drill bit when conical bit 4 runs into harder soil layer and just can realize continuing to drill the soil layer to the destruction of harder soil layer, its work efficiency is higher, and the operation is simpler, need not consume more time and changes the drill bit.

Claims (6)

1. The utility model provides a drill bit in building pile hole which characterized in that: the drill bit comprises an outer sleeve, a spiral plate A, a conical drill bit, an inner sleeve, a positioning ring, a spring A, a weight block, a limiting guide block, a spring B, a guide column, a spiral plate B, a notch A, a notch B, a swing plate A, a swing plate B, a volute spiral spring, a shifting plate and a spring C, wherein the spiral plate A is spirally arranged on the outer cylindrical surface of the outer sleeve along the central axis of the outer sleeve; the inner sleeve rotates and axially slides in the outer sleeve, and the inner sleeve is provided with a spring A for resetting the axial movement of the inner sleeve; the outer cylindrical surface of the inner sleeve is provided with a positioning ring, and the positioning ring rotates and axially slides in a ring groove A on the inner wall of the outer sleeve; a square weight block vertically slides in the square sliding groove A on the upper end surface of the inner sleeve, and the central axis of the through round movable groove between the upper end surface and the lower end surface of the square weight block is superposed with the central axis of the outer sleeve; the weight block is provided with a spring C for resetting the weight block; a limiting guide block is horizontally moved in a sliding groove B on the inner wall of the movable groove, and a spring B for resetting the limiting guide block is arranged on the limiting guide block; one end of the limiting guide block is provided with an inclined plane;

the guide column is arranged at the center of the top in the outer sleeve, and a spiral plate B is spirally arranged on the cylindrical surface of the guide column along the central axis of the cylindrical surface; the lower end of the spiral plate B is provided with a shifting plate matched with the inclined plane end of the limiting guide block; the rotating spiral plate B drives the heavy block to vertically move upwards along the sliding groove A through the interaction with the limiting guide block which passes over the shifting plate; the spiral plate B is provided with a notch A and a notch B, the notch A is positioned at the uppermost end of the spiral plate B, and the notch B is positioned right below the notch A and penetrates through the whole spiral plate B downwards along the central axis of the spiral plate B; the limiting guide block is matched with the notch A and the notch B;

the swinging plate A and the swinging plate B swing oppositely or reversely in the notch B on each circle of the spiral plate B; the swinging plate A and the swinging plate B which are positioned in the same cut B close and open the corresponding cut B; the swing plate A is in transmission connection with the swing plate B; the swinging plate A and the swinging plate B which close the notch B enable the limiting guide block which spirally rises relative to the guide column to smoothly cross the corresponding notch B; a volute spiral spring for resetting the swing plate A is arranged on the swing plate A; opposite wall surfaces of the swing plate A and the swing plate B in a vertical state in each notch B are respectively matched with two side surfaces of the limiting guide block, and the swing plate A and the swing plate B are respectively matched with two opposite inner walls in the corresponding notches B;

the lower end of the inner sleeve is provided with a conical drill bit with the same central axis as the inner sleeve, and a plurality of tip protrusions are uniformly distributed on the conical surface of the conical drill bit.

2. A drill bit for construction of a piling hole according to claim 1, wherein: two damping blocks are symmetrically arranged at the cone tip of the conical drill bit.

3. A drill bit for construction of a piling hole according to claim 1, wherein: the spring A is nested on the inner sleeve and is positioned in the annular groove A; the upper end of the spring A is connected with the positioning ring, and the lower end of the spring A is connected with the inner wall of the annular groove A.

4. A drill bit for construction of a piling hole according to claim 1, wherein: two guide grooves are symmetrically formed in the inner wall of the sliding groove B, and two guide blocks are symmetrically arranged on the side face of the limiting guide block; the two guide blocks horizontally slide in the two guide grooves respectively; the spring B is positioned in the sliding groove B and is always in a compressed state; one end of the spring B is connected with the end face of the limiting guide block, and the other end of the spring B is connected with the inner wall of the sliding groove B.

5. A drill bit for construction of a piling hole according to claim 1, wherein: the spring C is nested on a guide column provided with a spiral plate B, and the spiral plate B is positioned in the spring C; one end of the spring C is connected with the top in the outer sleeve, and the other end of the spring C is in contact fit with the upper end surface of the weight block; the spring C is always in a compressed state.

6. A drill bit for construction of a piling hole according to claim 1, wherein: a limiting plate for limiting the corresponding swinging plate A and the swinging plate B to continuously swing downwards is arranged on the lower side of the inner wall of the notch B; two side surfaces of the limiting guide block are respectively matched with the swing plate A and the swing plate B in a vertical state.

Images