An impact hammer for a pile driver

Abstract

This invention discloses an impact hammer for a pile driver, comprising a hammer body, hammer bearings, and a fixing member. The hammer body extends radially outwards with several hammer limbs. Each hammer limb has a connecting surface on its outer periphery, and several hammer bearings are detachably fixed to the connecting surface via the fixing member. Several hammer bearings on one connecting surface form a hammer bearing assembly, the thickness of which is adjustable along the diameter of the hammer body. A hollow hammer cap is provided at the top of the hammer body to accommodate a counterweight. The impact hammer also includes a first limiting member, which is detachably connected to the hammer cap to prevent the counterweight from detaching from the hammer cap. This impact hammer, through its variable diameter and adjustable weight, is widely applicable to drilling operations in various engineering conditions, thereby improving construction efficiency and saving construction costs.

Description

Technical Field

[0001] This invention relates to the field of pile driving equipment, and more particularly to an impact hammer for a pile driver. Background Technology

[0002] In building pile foundation engineering, when bored piles are used for construction, the drilling method involves using a pile driver to lift an impact hammer with a drill bit, relying on the impact force of its free fall to cut through the rock strata, while simultaneously using mud circulation to remove debris. Currently available impact hammers are typically of fixed diameter and weight. However, pile diameters often vary in pile foundation designs, and the geological conditions at pile foundation locations differ significantly and are complex. Therefore, during bored pile construction, it is necessary not only to change the impact hammer to a different diameter for different pile diameters but also to use impact hammers of different weights depending on the specific geological conditions.

[0003] This construction method has the following disadvantages: In the drilling construction, the construction team needs to purchase and prepare several different types of impact hammers, which increases the cost of tooling and equipment, making it particularly uneconomical; When changing impact hammers, the impact hammers need to be transported to different sites, and the disassembly, assembly, lifting and transportation processes all consume a lot of time, resulting in low overall drilling efficiency of the pile foundation.

[0004] Therefore, there is an urgent need to invent an impact hammer for pile drivers that can be modified in diameter and weight, and has wide applicability to drilling operations in various engineering situations, thereby improving construction efficiency and saving construction costs. Summary of the Invention

[0005] The main technical problem to be solved by the present invention is to provide an impact hammer for a pile driver that can be modified in diameter and weight to be suitable for punching operations in various engineering situations.

[0006] To solve the above-mentioned technical problems, the present invention provides an impact hammer for a pile driver, comprising a hammer body, a hammer bearing, and a fixing component;

[0007] The hammer body extends radially outward with several hammer limbs; the outer periphery of each hammer limb has a connecting surface, and several hammer tiles are detachably fixed to the connecting surface by the fastener;

[0008] Several hammer tiles on the same connecting surface form a hammer tile group, and the thickness of the hammer tile group is adjustable along the diameter direction of the hammer body.

[0009] In a preferred embodiment, the top of the hammer body is provided with a hollow hammer cap to accommodate the counterweight;

[0010] The impact hammer also includes a first limiting member; the first limiting member is detachably connected to the hammer cap to prevent the counterweight from detaching from the hammer cap.

[0011] In a preferred embodiment, the fixing member includes a connecting rod, a second limiting member, and a third limiting member;

[0012] The connecting rod passes through the connecting surface into the hammer arm; the connecting rod is limited and engaged with the hammer arm by the second limiting member in the passing direction;

[0013] The hammer bearing is sleeved on the surface of the connecting rod and is in a sealed sliding connection with the connecting rod; the connecting rod is provided with the third limiting member at the end away from the hammer limb to restrict the movement of the hammer bearing away from the hammer limb.

[0014] In a preferred embodiment, the second limiting member is a second pin; the connecting rod and the hammer limb are engaged by the second pin in a pin-type connection.

[0015] In a preferred embodiment, the hammer arm is provided with a pair of fourth clearance through holes within the through length of the connecting rod; the connecting rod is provided with a plurality of second clearance through holes at intervals along the through direction; the second pin passes through both the fourth clearance through holes and the second clearance through holes to fix the connecting rod to the hammer arm.

[0016] The spacing distribution of the second clearance through holes matches the thickness arrangement of the hammer.

[0017] In a preferred embodiment, a plurality of hammer plates are sleeved on the connecting rod, and the hammer plates are of equal thickness;

[0018] The second clearance holes are evenly distributed along the insertion direction of the connecting rod.

[0019] In a preferred embodiment, the connecting surface extends in a direction parallel to the axis of the hammer body; the connecting rod passes through the connecting surface along the diameter direction of the hammer body; the distance between two adjacent second clearance through holes is equal to the thickness of the hammer bearing.

[0020] In a preferred embodiment, the third limiting member is a third pin; the third pin passes through the connecting rod and extends beyond the connecting rod for a certain length to limit the engagement with the hammer.

[0021] In a preferred embodiment, when the second pin or the third pin passes through the connecting rod, it has bent sections at both ends.

[0022] In a preferred embodiment, the fixing member is a screw;

[0023] The hammer bearing is sleeved on the surface of the screw rod; a nut is provided at the end of the screw rod to restrict the movement of the hammer bearing away from the hammer limb;

[0024] The hammer arm has a threaded inner groove extending inward from the connecting surface; the screw fixes the hammer bearing to the connecting surface by threaded engagement with the threaded inner groove.

[0025] Compared with the prior art, the technical solution of the present invention has the following beneficial effects:

[0026] The impact hammer provided by the present invention cleverly and quickly constructs different punching diameters by adjusting the thickness of the hammer bearing on the outer periphery of the hammer limb, thereby meeting the construction needs of different pile diameters.

[0027] Meanwhile, the impact hammer provided by the present invention can accommodate a counterweight in the hammer cap at the top, and the first limiting member and the hammer cap are fixed to the counterweight through a detachable connection, so that the impact hammer can adjust its punching weight according to different geological conditions.

[0028] In summary, the impact hammer, through its free diameter variation and weight adjustment, has wide applicability to punching operations in various engineering situations, thereby improving construction efficiency and saving construction costs. Attached Figure Description

[0029] Figure 1 This is a three-dimensional schematic diagram of the impact hammer described in an embodiment of the present invention;

[0030] Figure 2 This is a top view of the impact hammer described in an embodiment of the present invention;

[0031] Figure 3 This is a partial exploded view of the impact hammer described in an embodiment of the present invention;

[0032] Figure 4 This is a schematic diagram showing the connection between the connecting rod and the hammer limb in an embodiment of the present invention;

[0033] Figure 5 This is a three-dimensional schematic diagram of the hammer cap and the first limiting member in an embodiment of the present invention.

[0034] The markings in the diagram are as follows: 1-hammer body, 11-hammer limb, 111-connecting surface, 112-fourth clearance through hole, 2-hammer bearing, 21-clearance cavity, 3-fixing component, 31-connecting rod, 311-second clearance through hole, 312-third clearance through hole, 32-second limiting component, 320-second pin, 33-third limiting component, 330-third pin, 4-hammer cap, 41-first clearance through hole, 42-opening, 5-first limiting component, 51-first pin. Detailed Implementation

[0035] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0036] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0037] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed", "equipped", "sleeved / connected", "connected", etc., should be interpreted broadly. For example, "connection" can be a wall-mounted 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 a connection within two components. For those skilled in the art, the specific meaning of the above terms in this invention can be understood according to the specific circumstances.

[0038] As shown in the figure, this embodiment of the invention provides an impact hammer for a pile driver, including a hammer body 1, hammer bearings 2, and a fixing member 3. Generally, the hammer body 1 has several hammer limbs 11 extending radially outward. The outer periphery of each hammer limb 11 has a connecting surface 111. Several hammer bearings 2 are detachably fixed to the connecting surface 111 using the fixing member 3. Several hammer bearings 2 on the same connecting surface 111 form a hammer bearing group, the thickness of which is adjustable along the diameter of the hammer body 1 to create different drilling diameters. The hammer body 1 also has a hollow hammer cap 4 at the top to install counterweights of different specifications, achieving adjustable weight for the impact hammer.

[0039] The following section, in conjunction with illustrations, provides a detailed explanation of the specific structure of each component and their interconnections.

[0040] The hammer body 1 extends radially outwards with several hammer limbs 11, forming a claw-shaped structure. As prior art, the specific construction of the hammer body 1 itself will not be described in detail here. As shown in the figure, the outer periphery of each hammer limb 11 has a connecting surface 111. The hammer pad 2 fits onto the connecting surface 111, achieving a tight connection with the hammer limb 11. Specifically, in this embodiment, the several connecting surfaces 111 are all located on a cylindrical surface formed with the axis of the hammer body 1 as the center; that is, the connecting surfaces 111 extend in a direction parallel to the axis of the hammer body 1, and the radii of any two connecting surfaces 111 to the axis of the hammer body 1 are equal. This construction facilitates directly equating the increase or decrease in the thickness of the hammer pad 2 with the change in the diameter of the impact hammer drill hole. It is understood that as long as it can fit snugly with the hammer pad 2, the shape of the connecting surface 111 should not be restricted; it can be a regular plane or arc surface, or it can be constructed in an irregular shape to improve the interlocking effect with the hammer pad 2.

[0041] As shown in the figure, in this embodiment, the total thickness of the hammer tile assembly fixed on each connecting surface 111 is obtained by stacking several hammer tiles 2. In this embodiment, the thickness of the hammer tiles 2 is equal and can be 5 cm, 7.5 cm, 10 cm, etc., values ​​that are easy to accumulate and calculate. It should be understood that as long as the hammer body 1 can adapt to different drilling diameters by stacking the hammer tiles 2, the thickness specification of the hammer tiles 2 should not be limited. For example, in other embodiments, a hammer tile assembly can be composed of three 5 cm, two 10 cm, one 15 cm, etc., hammer tiles of different thicknesses, to be combined according to actual needs. Furthermore, the total thickness of the hammer bearing assembly fixed on each connecting surface 111 can also be adjusted by replacing the hammer bearings 2. That is, a hammer bearing assembly can include one hammer bearing 2 of different thicknesses such as 10 cm, 15 cm, 20 cm, 25 cm, etc. If the pile diameter is 40 cm wider than the hammer body 1, then a 20 cm thick hammer bearing 2 is fixed on each connecting surface 111; if the pile diameter is 50 cm wider than the hammer body 1, then a 25 cm thick hammer bearing 2 is fixed on each connecting surface 111, and so on. In this embodiment, in order to make the final drilled pile hole as close to a circle as possible, the hammer bearing 2 is constructed as an arc shape.

[0042] As shown in the figure, the fixing member 3 includes a connecting rod 31, a second pin 320, and a third pin 330. In this embodiment, the second limiting member 32 uses the second pin 320, and the third limiting member 33 uses the third pin 330. The connecting rod 31 passes through the connecting surface 111 along the diameter direction of the hammer body 1, and is connected to the hammer limb 11 in a sealed sliding connection. The hammer pad 2 is provided with a clearance cavity 21 along the thickness direction to fit onto the surface of the connecting rod 31, thereby achieving a sealed sliding connection with the connecting rod 31. The connecting rod 31 is provided with a third clearance hole 312 at the end away from the hammer limb 11. The third pin 330 passes through the third clearance hole 312 and extends out of the connecting rod 31 for a certain length, thereby preventing the hammer pad 2 from falling off the connecting rod 31 in a direction away from the hammer limb 11. The hammer limb 11 is provided with a pair of fourth clearance holes 112 within the length range of the connecting rod 31. Correspondingly, the connecting rod 31 is provided with a plurality of second clearance through holes 311 spaced apart along the through direction. During actual installation, after pushing the connecting rod 31 to make the hammer pad 2 fit against the connecting surface 111, the second pin 320 simultaneously passes through the fourth clearance through hole 112 and a specific second clearance through hole 311. Through a pin-type engagement, the sliding of the connecting rod 31 is restricted, and the hammer pad 2 is fixed to the outer periphery of the hammer limb 11. It is easy to understand that when the second pin 320 exits the fourth clearance through hole 112 and the second clearance through hole 311, the connecting rod 31 can slide relative to the hammer limb 11 to remove or add more hammer pads 2.

[0043] To ensure that the hammer 2 fits snugly against the connecting surface 111 when fixed, the spacing of the second clearance through holes 311 must match the thickness arrangement of the hammer 2. Specifically, in this embodiment, since the hammer 2 is of uniform thickness, the distance between any two adjacent second clearance through holes 311 is equal to the thickness of the hammer 2, and the distance from the third clearance through hole 312 to the nearest second clearance through hole 311 is also equal to the thickness of the hammer 2.

[0044] Furthermore, in order to prevent the second pin 320 or the third pin 330 from falling off under strong vibration when it is inserted into the connecting rod 31, the second pin 320 and the third pin 330 are folded up at both ends, thereby locking them on both sides of the aforementioned limiting hole.

[0045] As an equivalent alternative to this embodiment, in other embodiments, the arrangement of the fourth clearance through hole 112 and the second clearance through hole 311 can be interchanged. That is, one second clearance through hole 311 is provided on the connecting rod 31, while a plurality of fourth clearance through holes 112 are provided at intervals along the passing direction of the connecting rod 31 on the hammer limb 11. Similarly, the spacing of the fourth clearance through holes 112 must match the thickness arrangement of the hammer blade 2. The connecting rod 31 and the hammer limb 11 are still connected by a second pin 320 for a pin-type engagement. In other embodiments, the third limiting member 33 can also be an end plate provided at the end of the connecting rod 31. The end plate is fixed to one end face of the connecting rod 31 away from the hammer limb 11, and extends outward by a certain width to restrict the hammer blade 2 from disengaging from the connecting rod 31 in a direction away from the hammer limb 11.

[0046] In another embodiment, the fixing member 3 can be a screw. The screw has threads on its surface. The hammer bearing 2 has a first through hole extending along its thickness direction to fit onto the surface of the screw. The inner diameter of the first through hole is not less than the outer diameter of the thread, so that the hammer bearing 2 can slide and connect with the screw. A nut is provided at the end of the screw away from the hammer limb 11 to prevent the hammer bearing 2 from disengaging from the screw in a direction away from the hammer limb 11. The hammer limb 11 has a threaded inner groove extending inward from the connecting surface 111, and the screw fixes the hammer bearing 2 to the connecting surface 111 by threaded engagement with the threaded inner groove. This fixing method not only provides a stable connection but also allows for quick assembly and disassembly of the hammer bearing 2.

[0047] The hammer body 1 has a hollow hammer cap 4 at its top. The hammer cap 4 has a pair of openings 42 on its side wall for ropes to pass through and for lifting the impact hammer. As prior art, this part of the structure will not be described in detail here. As shown in the figure, a counterweight can be accommodated within the hollow cavity of the hammer cap 4. To prevent the counterweight from detaching from the hammer cap 4 during operation, the impact hammer is also equipped with a first limiting member 5. The first limiting member 5 engages with the hammer cap 4 through a pair of first clearance through holes 41 on the side wall of the hammer cap 4 in a pin-like manner, thereby fixing the counterweight. The height of the first clearance through holes 41 is not lower than the placement height of the counterweight. Similarly, to prevent the first limiting member 5 from falling off during punching operations, first pins 50 are provided at both ends of the first limiting member 5. The first pins 50 are bent at both ends to more stably fix the first limiting member 5. The first limiting member 5 can take various forms. For example, in other embodiments, the first limiting member can be a snap-on end cap, detachably fixed to the top of the hammer cap 4; the first limiting member 5 can also be a cork plug, easily achieving a tight connection and detachment with the hammer cap 4. It should be understood that the description of the first limiting member 5 in this document is to demonstrate the feasibility of the technical solution, and as a non-core element, it is not limited in this document.

[0048] The above description is merely a preferred embodiment of the present invention and is not intended to limit the patent scope of the present invention. Any technically equivalent modifications made based on the content of this specification shall fall within the protection scope of the present invention.

Claims

1. An impact hammer for a pile driver, characterized in that: Includes hammer body, hammer bearing, and fasteners; The hammer body extends radially outward with several hammer limbs; the outer periphery of each hammer limb has a connecting surface, and several hammer tiles are detachably fixed to the connecting surface by the fastener; Several hammer tiles on the same connecting surface are stacked to form a hammer tile group; several stacked tiles of different quantities or specifications are stacked to form hammer tile groups of different thicknesses, so that the thickness of the hammer tile group can be adjusted along the diameter direction of the hammer body, thereby changing the diameter and weight of the impact hammer.

2. The impact hammer for a pile driver according to claim 1, characterized in that: The top of the hammer body is provided with a hollow hammer cap to accommodate the counterweight. The impact hammer also includes a first limiting member; the first limiting member is detachably connected to the hammer cap to prevent the counterweight from detaching from the hammer cap.

3. The impact hammer for a pile driver according to claim 1, characterized in that: The fixing component includes a connecting rod, a second limiting component, and a third limiting component; The connecting rod passes through the connecting surface into the hammer arm; the connecting rod is limited and engaged with the hammer arm by the second limiting member in the passing direction; The hammer bearing is sleeved on the surface of the connecting rod and is in a sealed sliding connection with the connecting rod; the connecting rod is provided with the third limiting member at the end away from the hammer limb to restrict the movement of the hammer bearing away from the hammer limb.

4. An impact hammer for a pile driver according to claim 3, characterized in that: The second limiting component is a second pin; the connecting rod and the hammer limb are engaged by the second pin in a pin-type connection.

5. An impact hammer for a pile driver according to claim 4, characterized in that: The hammer leg is provided with a pair of fourth clearance through holes within the through length of the connecting rod; the connecting rod is provided with a plurality of second clearance through holes at intervals along the through direction; the second pin passes through both the fourth clearance through holes and the second clearance through holes to fix the connecting rod to the hammer leg. The spacing distribution of the second clearance through holes matches the thickness arrangement of the hammer.

6. An impact hammer for a pile driver according to claim 5, characterized in that: The connecting rod is fitted with several hammer plates, and the hammer plates are of equal thickness. The second clearance holes are evenly distributed along the insertion direction of the connecting rod.

7. An impact hammer for a pile driver according to claim 6, characterized in that: The connecting surface extends in a direction parallel to the axis of the hammer body; the connecting rod passes through the connecting surface along the diameter direction of the hammer body; the distance between two adjacent second clearance through holes is equal to the thickness of the hammer bearing.

8. An impact hammer for a pile driver according to any one of claims 4 to 7, characterized in that: The third limiting component is a third pin; the third pin passes through the connecting rod and extends beyond the connecting rod for a certain length to limit the engagement with the hammer.

9. An impact hammer for a pile driver according to claim 8, characterized in that: When the second pin or the third pin is inserted into the connecting rod, it has bent sections at both ends.

10. An impact hammer for a pile driver according to claim 1, characterized in that: The fastener is a screw; The hammer bearing is sleeved on the surface of the screw rod; a nut is provided at the end of the screw rod to restrict the movement of the hammer bearing away from the hammer limb; The hammer arm has a threaded inner groove extending inward from the connecting surface; the screw fixes the hammer bearing to the connecting surface by threaded engagement with the threaded inner groove.

Images