A linkage-type foundation pit piling device with a hydraulic pile hammer

Abstract

This utility model relates to the field of foundation pit piling technology, specifically to a linkage-type foundation pit piling device for a hydraulic piling hammer. It includes a power unit, an output unit, and an execution unit connected in sequence. The power unit provides power to the device. The output unit includes a hammer body and an internal hammer core. The execution unit uses a punch head within the output frame to receive the impact force of the hammer core and achieve piling. Wear-resistant rods on the wear-resistant bracket slide in cooperation with the wear-resistant groove of the hammer core guide plate. Positioning rods on both sides assist in guidance, preventing direct wear between the hammer core and the hammer body. A lubrication component is provided at the upper end of the wear-resistant component. The lubrication oil chamber is controlled by a trigger plate, trigger rod, return spring, and traction spring. The lubricating oil passes through the oil guide chamber, diversion chamber, and array outlet chamber of the wear-resistant rod, and is precisely lubricated at the contact points between the wear-resistant component and the hammer core under the guidance of the guide plate. This device, through the linkage design of the wear-resistant and lubrication structures, reduces component wear, extends service life, and improves the stability and efficiency of piling operations.

Description

Technical Field

[0001] This utility model relates to the field of foundation pit piling technology, and in particular to a linkage foundation pit piling device with a hydraulic piling hammer. Background Technology

[0002] Currently, mainstream hydraulic pile driving hammer devices typically include core structures such as power supply, impact output, and pile driving execution. The power unit drives the internal hammer core to move, and the hammer core impacts the punch head of the execution unit to achieve the pile driving action. These devices are widely used in various foundation pit construction scenarios due to the advantages of hydraulic drive, providing important support for foundation construction. However, after long-term use, they have gradually exposed the prominent problem of wear and tear on key components.

[0003] In existing hydraulic pile driving hammer devices, the hammer core and hammer body mostly have a direct contact sliding fit. The high-frequency impact and sliding during pile driving operations lead to severe wear on both, which not only reduces the impact efficiency of the device but also shortens the service life of the equipment and increases maintenance and replacement costs. Although some devices have attempted to add simple wear-resistant structures, they lack targeted guiding and positioning designs, resulting in limited wear resistance. Furthermore, they lack efficient lubrication mechanisms, and the wear problem of the wear-resistant components themselves remains unresolved. These shortcomings are particularly pronounced in continuous high-intensity pile driving scenarios.

[0004] To address the wear and lubrication deficiencies of existing devices, we have developed a brand-new hydraulic pile hammer linkage-type foundation pit pile driving device. By setting up special wear-resistant components to achieve isolation and protection between the hammer core and the hammer body, and by combining it with a guide positioning structure to improve wear resistance and stability, and by matching it with linkage lubrication components to achieve precise lubrication, we aim to solve the problem of component wear, extend the service life of the equipment, and ensure the stability and efficiency of pile driving operations. Utility Model Content

[0005] In view of this, the purpose of this utility model is to propose a linkage-type foundation pit piling device for hydraulic piling hammers, so as to solve the problems of easy wear, reduced efficiency, and shortened life due to direct contact between the hammer core and the hammer body, as well as the problems of simple wear-resistant structures lacking guidance and lubrication, and the defects being more obvious in high-intensity operations.

[0006] Based on the above objectives, this utility model provides a linkage-type foundation pit piling device with a hydraulic piling hammer, comprising a device body, which is divided into a power unit, an output unit, and an execution unit. The power unit is located at the upper end of the device body and is used to provide power to the output unit. The output unit is located between the execution unit and the power unit. The output unit includes a hammer body installed below the power unit, and a hammer core is installed inside the hammer body. The execution unit includes an output frame installed below the hammer body, and a punch head is installed inside the output frame. The punch head contacts the hammer core. A wear-resistant component is installed inside the hammer body, and the wear-resistant component directly contacts the hammer core to prevent wear caused by direct contact between the hammer core and the hammer body. A lubrication component is installed at the upper end of the wear-resistant component, and the lubrication component is used to lubricate the wear-resistant component and the hammer core.

[0007] Preferably, the wear-resistant component includes a wear-resistant bracket installed inside the hammer body, a wear-resistant rod fixedly installed on the wear-resistant bracket, a guide plate fixedly installed on the upper end of the hammer core, and a wear-resistant groove slidably connected to the wear-resistant rod on the guide plate.

[0008] Preferably, positioning rods are fixedly connected to both sides of the wear-resistant rod body, the positioning rods are symmetrically arranged, and the positioning rods are in contact with the side of the guide plate.

[0009] Preferably, the lubrication component includes a lubricating oil cavity fixedly installed on a wear-resistant bracket, a trigger plate slidably connected inside the lubricating oil cavity, a trigger rod fixedly connected to the lower end of the trigger plate, a reset spring sleeved on the trigger rod, and a traction spring provided between the upper end of the trigger plate and the inner wall of the lubricating oil cavity.

[0010] Preferably, a second cavity is fixedly installed at the lower end of the lubricating oil cavity, the end of the trigger rod passes through the second cavity, a sealing plate is fixedly connected to the lower end of the second cavity, and a through block is fixedly connected to the end of the trigger rod, the through block being able to pass through the sealing plate.

[0011] Preferably, the upper end of the wear-resistant rod is provided with an oil guiding cavity, a diversion cavity, and an oil outlet cavity. The upper end of the oil guiding cavity corresponds to the position of the sealing plate. The oil guiding cavity is sealed and connected to the through hole of the sealing plate to ensure that the lubricating medium is transmitted without leakage. The oil guiding cavity and the diversion cavity are connected. The diversion cavity is located inside the wear-resistant rod. The oil outlet cavities are arranged in an array at the contact position between the wear-resistant rod and the wear-resistant groove.

[0012] Preferably, an array of guide plates is fixedly connected to the wear-resistant rod body. The guide plates are located at the lower end of the oil outlet chamber. The guide plates gradually increase in length from top to bottom. The tilt angle of the guide plates is 15°-20°, and their length gradually increases from top to bottom, which is used to evenly distribute the lubricating medium.

[0013] The beneficial effects of this utility model are: This foundation pit piling device uses wear-resistant components to isolate the hammer core from the hammer body. Combined with the bidirectional positioning of the circumferentially evenly distributed wear-resistant rods and symmetrical positioning rods, and the dynamic balance design of the guide disc, it significantly reduces off-center load wear and extends the equipment's lifespan.

[0014] The foundation pit piling device features a vibration-linked lubrication component that synchronously triggers oil supply with the impact of the hammer core. After being evenly distributed through the diversion chamber and guide plate, the array of oil outlet chambers precisely covers the friction surface, achieving dynamic matching between lubrication and friction requirements and ensuring a continuous oil film.

[0015] This foundation pit piling device features bidirectional positioning and precise lubrication to ensure the straightness of the hammer core movement, reduce vibration interference, and efficiently transfer impact energy to the punch head, thereby improving piling efficiency and operational stability. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only for this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the overall structure of the foundation pit piling device of this utility model; Figure 2 This is a schematic diagram of the internal structure of the output section in this utility model; Figure 3 This is a three-dimensional structural diagram of the wear-resistant component in this utility model; Figure 4 This is a three-dimensional schematic diagram of the wear-resistant bracket and guide plate in this utility model; Figure 5 This is a partial schematic diagram of the wear-resistant component in this utility model; Figure 6 This is a three-dimensional structural diagram of the trigger plate in this utility model; Figure 7 This is a schematic diagram of the internal structure of the lubricating oil cavity in this utility model; Figure 8 This is a partial enlarged view of the interior of the wear-resistant rod in this utility model.

[0018] The diagram is marked as follows: 1. Power unit; 2. Output unit; 3. Execution unit; 21. Hammer body; 22. Hammer core; 31. Output frame; 32. Stamping head; 4. Wear-resistant parts; 5. Lubrication parts; 41. Wear-resistant bracket; 42. Wear-resistant rod; 43. Guide plate; 44. Wear-resistant groove; 45. Positioning rod; 51. Lubricating oil chamber; 52. Trigger plate; 53. Trigger rod; 54. Return spring; 55. Traction spring; 56. Second chamber; 57. Sealing plate; 58. Through block; 421. Oil guide chamber; 422. Diverting chamber; 423. Oil outlet chamber; 424. Guide plate. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments.

[0020] It should be noted that, unless otherwise defined, the technical or scientific terms used in this utility model should have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar terms used in this utility model do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0021] like Figures 1 to 8 As shown, a linkage-type foundation pit piling device with a hydraulic piling hammer includes a device body, which is divided into a power unit 1, an output unit 2, and an execution unit 3. The power unit 1 is located at the upper end of the device body and is used to provide power to the output unit 2. The power unit 1 is installed at the top of the device body and adopts a drive mode of motor combined with hydraulic pump group. The output unit 2 is located between the execution unit 3 and the power unit 1 and is used to realize the conversion of hydraulic energy into mechanical energy. The output unit 2 includes a hammer body 21 installed below the power unit 1, and a hydraulic pump is installed inside the hammer body 21. The hammer core 22 and the actuator 3 include an output frame 31 installed below the hammer body 21. A punch head 32 is installed inside the output frame 31. The actuator 3 acts directly on the pile body to achieve the final output of the pile driving operation. The punch head 32 is in contact with the hammer core 22. A wear-resistant component 4 is installed inside the hammer body 21. The wear-resistant component 4 is in direct contact with the hammer core 22 to prevent wear caused by direct contact between the hammer core 22 and the hammer body 21. A lubrication component 5 is installed on the upper end of the wear-resistant component 4 to lubricate the wear-resistant component 4 and the hammer core 22.

[0022] Furthermore, such as Figure 2 , Figure 3 and Figure 4 As shown, the wear-resistant component 4 includes a wear-resistant bracket 41 installed inside the hammer body 21. The wear-resistant bracket 41 serves as the mounting carrier for the wear-resistant rod 42, its core function being to achieve stable fixation and precise positioning of the rod. It also adapts to the internal structure of the hammer body 21. The wear-resistant rod 42 is fixedly mounted on the wear-resistant bracket 41. The wear-resistant rod 42 is the core actuator for guidance and wear resistance, slidingly engaging with the wear-resistant groove 44 of the guide plate 43 to achieve precise guidance of the hammer core 22. Three to five wear-resistant rods 42 are evenly distributed around the circumference of the wear-resistant bracket 41, with adjacent rods having equal included angles (60° or 120°) to ensure balanced force distribution on the guide plate 43 and prevent uneven wear on the hammer core 22. To prevent wear, a guide plate 43 is fixedly installed on the upper end of the hammer core 22. The guide plate 43 is fixed to the upper end of the hammer core 22 and restricts the radial displacement of the hammer core 22 through sliding cooperation with the wear-resistant rod body 42, while transmitting part of the axial force. After the guide plate 43 is processed, it is subjected to dynamic balancing test, and the balancing accuracy level reaches G6.3 (allowable unbalance ≤1.5g・m). This avoids vibration and additional wear caused by eccentricity when the hammer core 22 moves. A wear-resistant groove 44 is opened on the guide plate 43 and slides with the wear-resistant rod body 42. The wear-resistant groove 44 is opened on the guide plate 43 and slides with the wear-resistant rod body 42. It is a key part that directly bears friction and adopts a U-shaped groove structure.

[0023] Furthermore, such as Figure 4 and Figure 5 As shown, positioning rods 45 are fixedly connected to both sides of the wear-resistant rod body 42. The positioning rods 45 are symmetrically arranged and contact the side of the guide plate 43. As a supplementary positioning component of the wear-resistant rod body 42, the positioning rods 45 further limit the radial displacement of the hammer core 22 through precise contact with the side of the guide plate 43, enhance the stability of the reciprocating motion, and form a "two-way positioning" synergistic effect with the wear-resistant rod body 42 and the guide plate 43.

[0024] Furthermore, such as Figures 5-8 As shown, the lubrication component 5 includes a lubricating oil cavity 51 fixedly installed on the wear-resistant bracket 41, which has a cylindrical cavity structure. A trigger plate 52 is slidably connected inside the lubricating oil cavity 51. A trigger rod 53 is fixedly connected to the lower end of the trigger plate 52. The lower end of the trigger rod 53 extends out of the lubricating oil cavity 51 and has a hemispherical structure at the end. A reset spring 54 is sleeved on the trigger rod 53. A traction spring 55 is provided between the upper end of the trigger plate 52 and the inner wall of the lubricating oil cavity 51.

[0025] Furthermore, such as Figure 6As shown, a second cavity 56 is fixedly installed at the lower end of the lubricating oil cavity 51, the end of the trigger rod 53 passes through the second cavity 56, a sealing plate 57 is fixedly connected to the lower end of the second cavity 56, and a through block 58 is fixedly connected to the end of the trigger rod 53. The through block 58 can pass through the sealing plate 57.

[0026] A one-way valve is provided between the lubricating oil chamber 51 and the oil guide chamber 421. When hammering, the one-way valve supplies oil to the oil guide chamber 421, and when returning, the one-way valve draws back to replenish the lubricating medium.

[0027] Furthermore, such as Figure 8 As shown, the upper end of the wear-resistant rod 42 is provided with an oil guiding cavity 421, a diversion cavity 422, and an oil outlet cavity 423. The upper end of the oil guiding cavity 421 corresponds to the position of the sealing plate 57. An annular sealing ring is fitted at the inlet of the oil guiding cavity 421 and is pressed tightly against the positioning ring of the sealing plate 57 to form a double seal, completely preventing the pit mud and sand from entering. The oil guiding cavity 421 and the diversion cavity 422 are connected. The diversion cavity 422 is located inside the wear-resistant rod 42 and below the oil guiding cavity 421. It adopts an annular main cavity combined with a radial branch cavity structure. The oil outlet 423 is arranged in an array at the contact position between the wear-resistant rod 42 and the wear-resistant groove 44. It is opened on the side where the wear-resistant rod 42 and the wear-resistant groove 44 contact, and is evenly distributed in 3-4 rows along the axial direction of the rod, with 4-6 in each row, forming an annular array that covers the entire friction contact surface.

[0028] Furthermore, such as Figure 8 As shown, an array of guide plates 424 are fixedly connected inside the wear-resistant rod body 42. The guide plates 424 are located at the lower end of the oil outlet chamber 423. The guide plates 424 gradually increase in size from top to bottom. The tilt angle of the guide plates 424 is 15°-20°. The structure of increasing from top to bottom can make the grease flowing into the oil outlet chamber 421 evenly dispersed along the plate surface, avoiding the grease from flowing downward due to gravity. Each guide plate 424 corresponds to one radial branch chamber, guiding the grease to accurately enter the branch chamber and then distribute it to each oil outlet chamber 423.

[0029] Working principle: After the power unit 1 starts, the motor drives the hydraulic pump unit to operate, converting electrical energy into hydraulic energy. The PLC control system adjusts components such as the solenoid directional valve and overflow valve to output stable high-pressure hydraulic oil. This high-pressure hydraulic oil drives the hammer core 22 of the output unit 2 to perform high-frequency reciprocating linear motion within the hammer body 21 (impact frequency 15-30 times / min), realizing the conversion of hydraulic energy into mechanical energy and providing the core impact force for piling operations. During the reciprocating motion of the hammer core 22, its upper guide plate 43 forms a sliding fit with the wear-resistant rod 42 on the wear-resistant bracket 41. The wear-resistant rod 42 is evenly distributed circumferentially, and the radial displacement of the hammer core 22 is restricted by the U-shaped wear-resistant groove 44, avoiding... To prevent eccentric wear, the symmetrical positioning rods 45 on both sides of the wear-resistant rod 42 make precise contact with the sides of the guide plate 43, forming a two-way positioning structure that combines radial limiting with side contact. This further constrains the offset of the hammer core 22. Combined with the G6.3 level dynamic balance design of the guide plate 43, this ensures the straightness of the hammer core 22's movement, reduces vibration interference, and lays the foundation for stable impact and vibration force transmission. When the hammer core 22 impacts downwards, its lower end precisely strikes the impact block at the upper end of the punch head 32, generating high-frequency vibration force. This vibration force is transmitted upwards to the lubrication component 5 through the hammer body 21 and the wear-resistant bracket 41. The vibration force drives the lubrication oil cavity 51 and the internal trigger plate 52 to vibrate synchronously. Under the action of vibration inertia... Downward, the trigger plate 52 slides axially relative to the stationary lubricating oil cavity 51, thereby driving the trigger rod 53 to move synchronously within the lubricating oil cavity 51 and the second cavity 56. The through block 58 at the end of the trigger rod 53 moves upward with the rod body, passing through the sealing plate 57 at the lower end of the second cavity 56. At the same time, the trigger plate 52 slides and compresses the volume of the lubricating oil cavity 51, causing the grease in the cavity to open the one-way valve under pressure. After being collected by the guide groove of the second cavity 56, it flows into the oil guide cavity 421 of the wear-resistant rod body 42 through the central opening of the sealing plate 57. The grease flows down along the oil guide cavity 421 to the diversion cavity 422 (annular main cavity + radial branch cavity structure), and then through the guide plate 4 at the lower end of the diversion cavity 422. 24 is evenly distributed to each radial branch cavity, and finally atomized and sprayed out through the array-type oil outlet cavity 423, accurately covering the friction surface of the wear-resistant rod body 42 and the wear-resistant groove body 44 to form a continuous oil film. When the hammer core 22 moves upward, the impact block disengages from the hammer core 22, the vibration force weakens, and under the combined action of the elastic force of the return spring 54 and the tension of the traction spring 55, the trigger plate 52, the trigger rod 53 and the through block 58 quickly reset. The through block 58 returns to the position below the sealing plate 57, the lubricating oil cavity 51 forms a negative pressure, and new grease is drawn in through the one-way valve to complete one lubrication cycle. The high-frequency characteristics of the vibration force are dynamically matched with the impact frequency of the hammer core 22 to ensure that the lubrication action is synchronized with the friction demand.

[0030] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples; within the framework of the present invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in the details for the sake of brevity.

[0031] This utility model is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A linkage-type foundation pit piling device for a hydraulic pile hammer, characterized in that: The device includes a main body, which is divided into a power unit (1), an output unit (2), and an execution unit (3). The power unit (1) is located at the upper end of the main body and is used to provide power to the output unit (2). The output unit (2) is located between the execution unit (3) and the power unit (1). The output unit (2) includes a hammer body (21) installed below the power unit (1), and a hammer core (22) is installed inside the hammer body (21). The execution unit (3) includes an output unit installed below the hammer body (21). The output frame (31) has a punch head (32) installed inside it. The punch head (32) is in contact with the hammer core (22). The hammer body (21) has a wear-resistant component (4) installed inside it. The wear-resistant component (4) is in direct contact with the hammer core (22) to prevent the hammer core (22) from directly contacting the hammer body (21) and causing wear. The upper end of the wear-resistant component (4) is equipped with a lubricating component (5) to lubricate the wear-resistant component (4) and the hammer core (22).

2. The linkage-type foundation pit piling device for a hydraulic pile hammer according to claim 1, characterized in that: The wear-resistant component (4) includes a wear-resistant bracket (41) installed inside the hammer body (21). A wear-resistant rod (42) is fixedly installed on the wear-resistant bracket (41). A guide plate (43) is fixedly installed on the upper end of the hammer core (22). A wear-resistant groove (44) is provided on the guide plate (43) and is slidably connected to the wear-resistant rod (42).

3. The linkage-type foundation pit piling device for a hydraulic piling hammer according to claim 2, characterized in that: The wear-resistant rod body (42) is fixedly connected to two sides of a positioning rod (45), the positioning rod (45) is symmetrically arranged, and the positioning rod (45) is in contact with the side of the guide plate (43).

4. The linkage-type foundation pit piling device for a hydraulic piling hammer according to claim 1, characterized in that: The lubrication component (5) includes a lubricating oil cavity (51) fixedly installed on a wear-resistant bracket (41). A trigger plate (52) is slidably connected inside the lubricating oil cavity (51). A trigger rod (53) is fixedly connected to the lower end of the trigger plate (52). A reset spring (54) is sleeved on the trigger rod (53). A traction spring (55) is provided between the upper end of the trigger plate (52) and the inner wall of the lubricating oil cavity (51).

5. The linkage-type foundation pit piling device for a hydraulic piling hammer according to claim 4, characterized in that: A second cavity (56) is fixedly installed at the lower end of the lubricating oil cavity (51). The end of the trigger rod (53) passes through the second cavity (56). A sealing plate (57) is fixedly connected at the lower end of the second cavity (56). A through block (58) is fixedly connected at the end of the trigger rod (53). The through block (58) can pass through the sealing plate (57).

6. The linkage-type foundation pit piling device for a hydraulic piling hammer according to claim 2, characterized in that: The upper end of the wear-resistant rod (42) is provided with an oil guide cavity (421), a flow divider cavity (422), and an oil outlet cavity (423). The upper end of the oil guide cavity (421) corresponds to the position of the sealing plate (57). The oil guide cavity (421) is sealed and connected to the through hole of the sealing plate (57) to ensure that the lubricating medium is transmitted without leakage. The oil guide cavity (421) is connected to the flow divider cavity (422). The flow divider cavity (422) is located inside the wear-resistant rod (42). The oil outlet cavities (423) are arranged in an array at the contact position between the wear-resistant rod (42) and the wear-resistant groove (44).

7. A linkage-type foundation pit piling device for a hydraulic piling hammer according to claim 6, characterized in that: The wear-resistant rod body (42) is fixedly connected with an array of guide plates (424). The guide plates (424) are located at the lower end of the oil outlet chamber (423). The guide plates (424) gradually increase in length from top to bottom. The guide plates (424) have an inclination angle of 15°-20° and their length gradually increases from top to bottom, which is used to evenly distribute the lubricating medium.

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