An integral counterweight assembly for a dynamic compactor

Abstract

The present invention discloses an integral counterweight assembly for a dynamic compactor, which includes a bottom counterweight, at least two upper counterweights and a counterweight limit seat. Double-headed studs for fixed installation are provided on the bottom counterweight. Positioning pins are provided on the upper surfaces of the upper counterweights, and positioning holes that are inserted and matched with the positioning pins are provided on the lower surfaces of the upper counterweights to stack the upper counterweights in sequence. And a connecting ear plate fixed to the counterweight limit seat by a pin is provided on the side of the bottom counterweight, and the counterweight limit seat is used for fixed installation on the platform of the dynamic compactor. Through the connection methods of the bottom counterweight and the upper counterweight blocks, each upper counterweight block, and the bottom counterweight and the counterweight platform of the dynamic compactor, while ensuring the machining accuracy, it is thread-connected with the detachable positioning pins. Under long-term impact loads, the positioning pins can be replaced if deformed, and it is more convenient and efficient to install the upper counterweights.

Description

Technical Field

[0001] The present invention relates to the technical field of heavy machinery, and particularly relates to an integral counterweight assembly for a dynamic compactor. Background Art

[0002] In the field of dynamic compactor construction machinery, existing counterweights are mostly small mixed units formed by pouring concrete and iron blocks, and multiple counterweights are combined to form a counterweight assembly through the positioning method of welding positioning pins.

[0003] The existing positioning method for counterweight blocks is combined positioning based on a plane and inner holes. For large counterweights, welding positioning pins are mostly used to ensure installation accuracy; while the overall stability of the counterweight assembly depends on threaded connections for fastening.

[0004] In the field of dynamic compaction, the whole machine has to withstand high-frequency repeated impact dynamic load. The installation stability of the counterweight is an unquestionable key safety factor. The combined positioning method of welding positioning pins has the following disadvantages: Welding is an irreversible fixed connection. Under multiple high-frequency repeated impact dynamic loads, the positioning pins will produce micro-deformation after a long time, and the perpendicularity of their axes to the counterweight surface will change, which is not conducive to replacement; due to errors in the production of small counterweight units, when multiple counterweights are interchanged, the interchangeability requirements cannot be met. In the combined counterweight assembly of multiple small-unit counterweights, its installation and disassembly are complex and troublesome.

[0005] Therefore, how to solve the problems of inconvenient disassembly and assembly of the existing counterweight assembly of the dynamic compactor and instability during use is a technical problem that needs to be solved urgently by those skilled in the art. Summary of the Invention

[0006] The purpose of the present invention is to provide an integral counterweight assembly for a dynamic compactor, which solves the problems of inconvenient disassembly and assembly of the existing counterweight assembly of the dynamic compactor and instability during use by changing the connection and fixing methods between existing counterweights.

[0007] To solve the above technical problems, the present invention provides an integral counterweight assembly for a dynamic compactor, including a bottom counterweight, at least two upper counterweights, and a counterweight limit seat. The bottom counterweight is provided with stud bolts for fixed installation. Each upper counterweight is provided with a positioning pin on its upper surface and a positioning hole that is inserted and matched with the positioning pin on its lower surface to stack the upper counterweights in sequence. And a connecting ear plate is provided on the side of the bottom counterweight and is fixed to the counterweight limit seat through a pin. The counterweight limit seat is used for fixed installation on the dynamic compactor platform.

[0008] Preferably, each upper counterweight is provided with at least two through holes, and it further includes welding long screws inserted and installed in the through holes.

[0009] Preferably, it further includes patches installed at the openings of the through holes.

[0010] Preferably, a handle is provided at the top of the welded long screw, and a stop washer is provided on the screw rod of the welded long screw near the top.

[0011] Preferably, one end of the stud passes through the bottom weight, and the other end of the stud is used to connect to the rammer platform.

[0012] Preferably, a limit nut is provided at one end of the stud.

[0013] Preferably, clamping mounting pieces are symmetrically provided at the upper and lower edges of the side of the upper weight.

[0014] Preferably, the adjacent clamping mounting pieces are clamped and fixed by clamping bolts and small nuts.

[0015] Preferably, the clamping mounting pieces are arranged at the midline of the upper weight.

[0016] The integral counterweight assembly of the rammer provided by the present invention includes a bottom weight, at least two upper weight blocks and a counterweight limit seat. Studs for fixed installation are provided on the bottom weight. Positioning pins are provided on the upper surfaces of the upper weight blocks, and positioning holes inserted and matched with the positioning pins are provided on the lower surfaces of the upper weight blocks to stack the upper weight blocks in sequence. And a connecting piece fixed to the counterweight limit seat by a pin is provided on the side of the bottom weight, and the counterweight limit seat is used for fixed installation on the rammer. The bottom weight and the upper weight adopt single-piece integral weights machined from all-steel plates. When installing the counterweight assembly, first install a positioning device on the rammer counterweight platform, then position the bottom weight on the rammer counterweight platform through the positioning device, and then clamp the bottom weight and the rammer counterweight platform with studs. Subsequently, connect the connecting ear plates on the counterweight limit seat and the bottom weight, insert the counterweight limit pin, and then weld and fix the counterweight limit seat on the rammer platform; after the installation of the bottom weight is completed, install positioning pins on the bottom weight, and the upper weight is positioned and installed on the bottom weight through the positioning pins, and the upper weights are also positioned and installed through the positioning pins between each other to complete the installation of the counterweight; this counterweight positioning and installation method is threadedly connected to the detachable positioning pins while ensuring machining accuracy. Under long-term impact loads, the positioning pins can be replaced if deformed, and the installation of the upper weight is more convenient and efficient. Description of the Drawings

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained according to the provided drawings without creative efforts.

[0018] Figure 1Schematic diagram of the overall structure of a specific embodiment provided by the present invention;

[0019] Figure 2 is Figure 1 Schematic diagram of the clamping mounting piece structure shown;

[0020] Figure 3 is Figure 1 Schematic diagram of the stud structure shown;

[0021] Figure 4 is Figure 1 Schematic diagram of the long screw rod structure shown;

[0022] Figure 5 is Figure 1 Schematic diagram of the overall structure stress shown;

[0023] Figure 6 is Figure 1 Schematic diagram of the bottom counterweight stress shown;

[0024] Figure 7 is Figure 1 Schematic diagram of the upper counterweight stress shown.

[0025] Among them, Figures 1-7 in:

[0026] Positioning pin - 1, welded long screw rod - 2, stop washer - 3, upper counterweight - 4, limit nut - 5, washer - 6, stud - 7, bottom counterweight - 8, connecting ear plate - 9, counterweight limit seat - 10, clamping bolt - 11, small nut - 12, clamping mounting piece - 13. Specific embodiment

[0027] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0028] Please refer to Figure 1 , Figure 1 which is the schematic diagram of the overall structure of a specific embodiment provided by the present invention.

[0029] In a specific embodiment provided by the present invention, it mainly includes a bottom counterweight 8, at least two upper counterweights 4, and a counterweight limit seat 10. A double-headed stud 7 for fixing itself is provided on the bottom counterweight 8. A positioning pin 1 is provided on the upper surface of each upper counterweight 4, and a positioning hole inserted and matched with the positioning pin 1 is provided on the lower surface of the upper counterweight 4 to stack the upper counterweights 4 in sequence. A connecting ear plate 9 fixed to the counterweight limit seat 10 by a pin is provided on the side of the bottom counterweight 8, and the counterweight limit seat 10 is used for fixed installation on the dynamic compactor platform.

[0030] Among them, the connecting ear plate 9 on the side of the bottom counterweight 8 is connected to the counterweight limit seat 10 to connect the bottom counterweight 8 and the counterweight limit seat 10. The double-headed stud 7 provided on the bottom counterweight 8 is used for connection with the dynamic compactor counterweight platform, and the positioning pin 1 and the positioning hole are used for connection between adjacent upper counterweights 4.

[0031] Specifically, in the actual application process, the upper counterweight 4 is a single-piece integral counterweight made of machined all-steel plates. When installing the counterweight assembly, first install a positioning device on the dynamic compactor counterweight platform, then position the bottom counterweight 8 on the dynamic compactor counterweight platform through the positioning device, and then clamp the bottom counterweight 8 and the dynamic compactor counterweight platform with the double-headed stud 7. Subsequently, connect the counterweight limit seat 10 and the connecting ear plate 9 on the bottom counterweight 8, insert a counterweight limit pin, and then weld the counterweight limit seat 10 to the dynamic compactor platform; after the installation of the bottom counterweight 8 is completed, install the positioning pin 1 on the bottom counterweight 8, and the upper counterweight 4 is positioned and installed on the bottom counterweight 8 through the positioning pin 1, and the upper counterweights 4 are also positioned and installed through the positioning pin 1 to complete the installation of the counterweight; this counterweight positioning and installation method is thread-connected with the detachable positioning pin 1 while ensuring machining accuracy. Under long-term impact loads, the positioning pin 1 can be replaced if it is deformed, and it is more convenient and efficient to install the upper counterweight.

[0032] Please refer to Figures 2 to 4 , Figure 2 For Figure 1 the structural schematic diagram of the clamping installation piece shown; Figure 3 For Figure 1 the structural schematic diagram of the double-headed stud shown; Figure 4 For Figure 1 the structural schematic diagram of the long screw shown.

[0033] The counterweight connection method in this application can be divided into three clamping mechanisms, namely a small clamping mechanism, a medium clamping mechanism, and a large clamping mechanism. Among them, as Figure 2The small clamping mechanism shown is designed to use the locking mechanism of the clamping bolts 11 and small nuts 12 to clamp the mounting plate 13. The small clamping mechanism is provided between each upper counterweight 4 and between the lowermost upper counterweight 4 and the bottom counterweight 8. The clamping bolts 11 pass through the bottom counterweight 8 and the upper counterweight 4 from bottom to top in reverse, so that a reliable whole is formed between the counterweights. As Figure 3 The medium clamping mechanism shown is designed to use the locking mechanism of the stud bolts 7, limit nuts 5 and flat washers, so that a reliable whole is formed between the bottom counterweight 8 and the rammer counterweight platform. As Figure 4 The large clamping mechanism shown is designed to use the locking mechanism of the welding long screw 2 with a large nut welded to its head and the stop washer 3. It penetrates the upper counterweight 4 and the bottom counterweight 8 integrally from top to bottom. There is a locking hole on the upper counterweight 4. After installation and clamping, one end of the stop washer 3 is folded down into the locking hole, and one end is folded up to coincide with the edge of the large nut.

[0034] Refer to Figures 5 to 7 , Figure 5 is Figure 1 the schematic diagram of the force on the overall structure shown; Figure 6 is Figure 1 the schematic diagram of the force on the bottom counterweight shown; Figure 7 is Figure 1 the schematic diagram of the force on the upper counterweight block shown.

[0035] Looking at the counterweight assembly, the counterweight assembly is mainly affected by three forces, namely the gravity G of the counterweight assembly, the clamping force F of the medium clamping mechanism, and the supporting force Fn of the platform on the counterweight assembly. The impact load mainly acts in the vertical direction. The impact load will cause the stud bolt 7 on the medium clamping mechanism to have an upward movement trend, causing the small nut 12 to have a movement trend towards the decrease of the pre-tightening force. The upward trend of the platform will cause the stud bolt 7 to generate a downward frictional force to maintain the balance state.

[0036] In order to form a whole between the counterweights and better adapt to the impact load of the rammer, at least 2 through holes are provided on the upper surface of each upper counterweight 4. It also includes a welding long screw 2 inserted and installed in the through hole. A handle is provided at the top of the welding long screw 2, and a stop washer 3 is provided on the rod body of the welding long screw 2 near the top; a large nut is welded to the head of the welding long screw 2, which penetrates the upper counterweight 4 and the bottom counterweight 8 integrally from top to bottom. There is a locking hole on the upper counterweight 4. After installation and clamping, one end of the stop washer 3 is folded down into the locking hole, and one end is folded up to coincide with the edge of the large nut, ensuring the tightness between the counterweight blocks.

[0037] In order to further improve the connection stability between the bottom counterweight 8 and the rammer counterweight platform, one end of the stud bolt 7 penetrates the bottom counterweight 8, and the other end of the stud bolt 7 is used to connect with the rammer platform; the following is the overall force analysis of the bottom counterweight 8. Refer to Figure 6, the bottom counterweight 8 is mainly acted upon by six forces, namely the gravity G of the bottom counterweight 8, the normal pressure F1 exerted by each upper counterweight 4 on the bottom counterweight 8, the clamping force F2 of the middle clamping mechanism, the clamping force F3 of the small clamping mechanism, the supporting force Fn of the platform on the bottom counterweight 8, and the pulling force F4 of the welding long screw 2 on the bottom counterweight 8; the upward movement trend of the overall counterweight causes the upward trend of the platform to generate a downward frictional force on the double-headed stud 7, that is, the clamping force F of the middle clamping mechanism increases, which means the clamping force F2 of the middle clamping mechanism exerted on the bottom counterweight 8 increases. Through force analysis, it can be known that the pulling force F4 of the welding long screw 2 on the bottom counterweight 8 increases, making the counterweight form a force balance state and become a whole.

[0038] Reference Figure 7 , in addition, the upper counterweight 4 except the bottom counterweight 8 as a whole receives an upward reaction force. The welding long screw 2 has an upward movement trend, and the upward trend will cause the long nut to have a movement trend towards the reduction of the pre-tightening force, generating a downward frictional force. By separately analyzing the forces acting on the topmost upper counterweight 4, it can be obtained that the topmost upper counterweight 4 is mainly acted upon by four forces, namely the gravity G of the upper counterweight 4, the clamping force F1 of the large clamping mechanism, the clamping force F2 of the small clamping mechanism, and the supporting force Fn received by the topmost upper counterweight 4; the topmost upper counterweight 4 has a tendency to squeeze downward, forcing the inverted clamping bolt 11 to move in the direction of increasing pre-tightening force, and finally feedback to the bottom counterweight 8 through the small clamping mechanism, thereby making the connection of the counterweight assembly more firm. Finally, when the whole machine is subjected to an impact load, the connection of the counterweight assembly is reliable, and the impact is converted into the vibration of the whole machine.

[0039] Finally, it should also be noted that the positioning pin 1 on this counterweight is made of Q345B, with a conical head, external threads processed at the tail, and a square surface processed in the middle. The head utilizes the advantage of the cone tending to be concentric, which is more conducive to hole alignment and micro eccentricity during installation. The design of adding a square surface in the middle facilitates the installation of disassembly tools, increases the contact area, and is conducive to the installation and disassembly of the positioning pin.

[0040] In summary, the integral counterweight assembly of the dynamic compactor provided in this embodiment mainly includes a bottom counterweight, at least two upper counterweight blocks, and a counterweight limit seat. The bottom counterweight block is provided with studs for fixed installation, positioning pins are provided on the upper surfaces of the upper counterweight blocks, and positioning holes that are inserted and matched with the positioning pins are provided on the lower surfaces of the upper counterweight blocks to stack the upper counterweight blocks in sequence. And a connecting ear plate fixed to the counterweight limit seat by a pin is provided on the side of the bottom counterweight, and the counterweight limit seat is used for fixed installation on the dynamic compactor. The bottom counterweight and the upper counterweight adopt single-piece integral counterweights machined from all-steel plates. When installing the counterweight assembly, first install a positioning device on the counterweight platform of the dynamic compactor, then position the bottom counterweight on the counterweight platform of the dynamic compactor through the positioning device, and then clamp the bottom counterweight and the counterweight platform of the dynamic compactor with stud bolts. Subsequently, connect the counterweight limit seat and the connecting ear plate on the bottom counterweight, insert the counterweight limit pin, and then weld the counterweight limit seat to the platform of the dynamic compactor; after the installation of the bottom counterweight is completed, install positioning pins on the bottom counterweight, and the upper counterweights are positioned and installed on the bottom counterweight through the positioning pins, and the upper counterweights are also positioned and installed through the positioning pins between each other to complete the installation of the counterweights; this counterweight positioning and installation method is threadedly connected to the detachable positioning pins while ensuring the machining accuracy. Under long-term impact loads, the positioning pins can be replaced if deformed, and it is more convenient and efficient to install the upper counterweights.

[0041] The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An integral counterweight assembly for a dynamic compactor, characterized in that, It includes a bottom counterweight, at least two upper counterweights and a counterweight limit seat. The bottom counterweight is provided with stud bolts for fixed installation. Each upper counterweight is provided with a positioning pin on its upper surface, and a positioning hole for plugging and mating with the positioning pin is provided on the lower surface of the upper counterweight to stack the upper counterweights in sequence. A connecting ear plate fixed to the counterweight limit seat by a pin is provided on the side of the bottom counterweight, and the counterweight limit seat is used for fixed installation on the dynamic compactor platform; Each upper counterweight is provided with at least two through holes on its upper surface. It further includes a welding long screw rod inserted and installed in the through holes. A large nut is welded to the head of the welding long screw rod. The welding long screw rod penetrates through the upper counterweight and the bottom counterweight from top to bottom as a whole. There is a locking hole on the upper counterweight. After installation and clamping, one end of the stop washer is folded down into the locking hole, and the other end is folded up to coincide with the edge of the large nut; Clamping installation pieces are symmetrically arranged at the upper and lower edges of the side of the upper counterweight; Adjacent clamping installation pieces are clamped and fixed by a clamping bolt and a small nut; The clamping bolt passes through the bottom counterweight and the upper counterweight, and between the upper counterweights from bottom to top in an inverted manner, so as to form a reliable whole among the counterweights; When an upward reaction force acts on the upper counterweight as a whole, the welding long screw rod has an upward movement tendency. The upward tendency will cause the long nut to have a movement tendency towards a decrease in the pre-tightening force, generating a downward frictional force. The topmost upper counterweight will have a tendency to squeeze downward, forcing the inverted clamping bolt to move in the direction of an increase in the pre-tightening force, and finally feedback to the bottom counterweight; It further includes a patch installed at the opening of the through hole; A handle is provided at the top of the welding long screw rod, and a stop washer is provided on the rod body of the welding long screw rod near the top; One end of the stud bolt penetrates through the bottom counterweight, and the other end of the stud bolt is used for connection with the dynamic compactor platform; A limit nut is provided at one end of the stud bolt; The clamping installation piece is arranged at the midline of the upper counterweight; The positioning pin is made of Q345B, with a conical head, external threads processed at the tail, and a square surface processed in the middle.

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