CN110080231B

CN110080231B - Foundation pit backfill soil compacting device and compacting method thereof

Info

Publication number: CN110080231B
Application number: CN201910239202.4A
Authority: CN
Inventors: 叶洋波; 吕朋橙; 谢韶; 肖晓斌
Original assignee: Zhejiang Lipeng Construction Co ltd
Current assignee: Zhejiang Lipeng Construction Co ltd
Priority date: 2019-03-27
Filing date: 2019-03-27
Publication date: 2021-01-08
Anticipated expiration: 2039-03-27
Also published as: CN110080231A

Abstract

The invention discloses a foundation pit backfill soil compacting device and a compacting method thereof, wherein the compacting device comprises a tray, an operating handle, a rammer, a driving device and an eccentric assembly, the eccentric assembly comprises a plurality of eccentric parts arranged around the axial lead of a connecting wheel, each eccentric part comprises a connecting strip, one end of each connecting strip is connected with the connecting wheel through a connecting screw, the other end of each connecting strip is connected with a balancing weight, one side of each balancing weight is provided with a connecting groove for clamping the connecting strip, and the bottom of each connecting groove is communicated with a threaded hole for screwing the connecting screw in. The number of the eccentric parts of the eccentric assembly can be adjusted, and then the weight and the center of gravity of the eccentric assembly are adjusted, so that the acting force of the rammer is adjusted to be suitable for different soil textures, and the application range is wide.

Description

Foundation pit backfill soil compacting device and compacting method thereof

Technical Field

The invention relates to foundation pit engineering, in particular to a foundation pit backfill soil compacting device and a compacting method thereof.

Background

The foundation pit refers to a temporary soil pit excavated for a building foundation, and the building foundation needs to be backfilled after being excavated. The common foundation pit backfilling method comprises the following steps: and (4) transporting the backfill soil to the edge of the foundation pit by using a transport vehicle, pouring the backfill soil, manually paving the backfill soil, compacting the backfill soil, and repeatedly carrying out multiple layers to finish backfilling. The filling and compacting method comprises the following steps: the rolling method, the tamping method and the vibration compaction method are suitable for different soil qualities and filling thicknesses. The tamping method is suitable for backfill with small area, and the tamping machines have various types, such as wood rammers, frog rammers, impact rammers and the like.

The frog ramming machine consists of mainly ramming head frame, driving mechanism, front shaft mechanism, tray, operating handle, electric equipment and lubricating system. The starting switch is arranged on the operating handle, and the operating handle is hinged with the tray and can swing flexibly so as to control the forward movement and the steering of the tamping machine.

The chinese patent with the publication number of CN103452092B discloses a balanced frog hammer, which comprises a chassis, the chassis front portion is provided with a tamper head frame, tamper head frame lower part is provided with a tamper head, be provided with transmission on the tamper head frame, the last reducing gear that is provided with of transmission, the reducing gear links together through triangle sticky tape and the intermediate wheel that sets up on the chassis, the intermediate wheel passes through the triangle sticky tape and links to each other with the motor, and it still includes first eccentric block and the second eccentric block that sets up on transmission, first eccentric block and the horizontal symmetry of second eccentric block set up on transmission.

The frog hammer has the following technical defects: the acting force of the rammer for compacting the filling soil comes from the centrifugal force of the eccentric block, the weight of the eccentric block is constant, the acting force of the rammer can be improved only by a method of improving the rotating speed of the motor, and after the rotating speed of the motor is improved, the vibration of the rammer is easily too strong, the use comfort of an operator is affected, and the improvement is needed.

Disclosure of Invention

In view of the above technical defects, the present invention aims to provide a foundation pit backfill compaction device, wherein the weight of an eccentric assembly can be adjusted, so as to adjust the acting force of a rammer.

In order to achieve the purpose, the invention provides the following technical scheme:

a foundation pit backfill compaction device comprises a tray, an operating handle, a rammer and a driving device, wherein the driving device comprises a fixing frame arranged on the upper side of the tray, a driving motor is arranged on the fixing frame and connected with a driving wheel, two sides of one end of the tray are respectively connected with a cushion block, the upper side of the cushion block is connected with a first bearing seat, two first bearing seats are rotatably connected with a driving shaft, the driving shaft is fixedly sleeved with a driven wheel and a driving wheel, a connecting belt is sleeved between the driven wheel and the driving wheel, the rammer is hinged with the driving shaft, two sides of the upper end of the rammer are respectively connected with a second bearing seat, a connecting shaft is rotatably connected between the two second bearing seats, the connecting shaft is fixedly sleeved with a connecting wheel, the driving belt is sleeved between the connecting wheel and the driving, eccentric subassembly includes a plurality of eccentric wares that set up around the fifth wheel axial lead, the eccentric spare includes the connecting strip, be connected through connecting screw between connecting strip one end and the fifth wheel, the other end is connected with the balancing weight, balancing weight one side is provided with the spread groove that supplies the connecting strip card to go into, spread groove tank bottom intercommunication has the screw hole that supplies the connecting screw to twist.

By adopting the above technical solution, the centrifugal force F = m ω is known²r, when the rotating speed of the driving motor is kept constant, the larger the mass of the eccentric component is, the farther the distance between the center of gravity and the axial lead of the driving wheel is, the larger the eccentric force is, and the better the compaction effect of the rammer is. The eccentric parts can be connected with each other, and the connecting screw is screwed after the connecting strip is clamped into the connecting groove, so that the number of the eccentric parts of the eccentric assembly can be adjusted, the weight and the gravity center of the eccentric assembly can be adjusted, the acting force of the rammer can be adjusted to be suitable for different soil qualities, and the application range is wide; the eccentric parts on the two sides are detached from the connecting wheel and then are installed on the eccentric part in the middle, so that the gravity center of the eccentric assembly can be adjusted, and the adjusting range of the acting force of the rammer is expanded.

The invention is further configured to: and one side of the connecting strip is provided with a containing groove for clamping the head of the connecting screw.

Through adopting above-mentioned technical scheme, connecting screw head can not expose, and then the trouble that connecting screw head hit the fifth wheel when avoiding eccentric assembly to rotate.

The invention is further configured to: the one end that the connecting strip deviates from eccentric subassembly is connected with the arc strip, and is adjacent the arc strip is hugged closely, connecting strip length is greater than the length of spread groove.

Through adopting above-mentioned technical scheme, two adjacent eccentric wares are hugged closely mutually, therefore arbitrary eccentric wares all can't rotate around connecting screw, and relatively fixed is effectual, avoids rotating the not hard up trouble of in-process connecting screw, need keep throughout when consequently adjusting the eccentric wares two eccentric wares of hugging closely mutually and being connected with the fifth wheel.

The invention is further configured to: the rammer includes two link frames of being connected with the drive shaft rotation, two be connected with the hammer block between the one end downside that the drive shaft was kept away from to the link frame.

Through adopting above-mentioned technical scheme, the rammer structure is firm.

The invention is further configured to: the hammer plate both sides all are provided with the expansion board, the expansion board is towards the one end fixedly connected with cutting of hammer plate, the hammer plate all is provided with the slot that supplies cutting male towards the one end of expansion board and the one end that the expansion board deviates from the hammer plate, expansion board upside are provided with the fixed orifices, fixed orifices department is provided with and cuts a threaded connection's set screw.

Through adopting above-mentioned technical scheme, the expansion board is inserted to hammer plate both sides, just can make the area of action increase of rammer, can not only carry out the adjustment area according to backfilling area, improves the efficiency of ramming, can also adjust the pressure of rammer.

The invention is further configured to: the tray upside is provided with buffer, buffer includes the vertical strip of hugging closely with the tray, the vertical strip upper end is connected with the buffering strip that extends the link upside, buffering strip is connected with buffer spring towards one side of link, buffering strip both sides all are connected with the limiting plate, two the interval of limiting plate is greater than the thickness of link.

Through adopting above-mentioned technical scheme, when eccentric subassembly's gravity is great, the centrifugal force that the ram received is too big and lift the distance height excessively easily to be so that the ram turns over towards driving motor, and buffer spring can play the effect of blockking, lifts the distance to the ram and carries on spacingly, gives the reaction force when the ram whereabouts simultaneously, improves the compaction effect, is applicable to the harder soil filling of soil property.

The invention is further configured to: the vertical bar lower extreme both sides all are connected with the fixture block, the tray is connected with the card frame that supplies the fixture block card to go into in vertical bar both sides, the tray is connected with the locating piece in one side that the vertical bar deviates from the link, articulates in the opposite side has the blend stop, blend stop and tray correspond the department and all are provided with fixed magnetite.

Through adopting above-mentioned technical scheme, rotate the blend stop until with the vertical strip dislocation back, the vertical strip just can follow and take off between two card frames, and then pull down buffer to be convenient for accomodate and place.

The invention is further configured to: operating handle includes with tray articulated dwang, two be connected with the grab handle between the one end that the tray was kept away from to the dwang, two link back of the body one side of mutually supporting all is provided with the draw runner that is used for spacing grab handle, be connected through two set screw between draw runner and the link, the draw runner is provided with the bar hole that supplies set screw to pass.

Through adopting above-mentioned technical scheme, when compaction device need be accomodate, rotate earlier the ram until receiving and block towards driving motor, eccentric subassembly receives the action of gravity and presses on driving motor, rotates operating handle towards the ram again until the grab handle is hugged closely with the link, unscrews set screw after that, and the draw runner moves up until blocking the grab handle, screws up set screw at last. The rammer and the operating handle are relatively fixed, and the rammer is convenient to store, place and transport.

The invention is further configured to: one end of the tray, which is far away from the operating handle, is connected with a soil retaining plate.

Through adopting above-mentioned technical scheme, avoid among the compaction process soil to fall on the tray, beat the trouble on the belt.

The invention also aims to provide a foundation pit backfill soil compacting method.

A foundation pit backfill soil compacting method comprises the following steps:

step 1: adjusting the weight of the eccentric component according to the soil quality, if the soil quality is hard, increasing the number of the eccentric parts, fixing the newly increased eccentric parts to the original eccentric parts through connecting screws, or detaching the eccentric parts at the two sides from the connecting wheel and then fixing the eccentric parts at the middle part; if the soil quality is softer, the number of the eccentric parts is reduced;

step 2: the driving motor is started, the driving wheel is driven to rotate through the connecting belt, the driving shaft is further driven to rotate, the connecting wheel is driven to rotate through the driving belt driving wheel, and therefore the eccentric assembly rotates around the axial lead of the connecting wheel to form centrifugal force, and the rammer is driven to rotate in a reciprocating mode to hammer, compact and fill soil.

In conclusion, the invention has the following beneficial effects:

1. the weight and the gravity center of the eccentric assembly can be adjusted to adjust the centrifugal force, so that the acting force of the rammer for hammering filled soil is adjusted, the optimization of compaction effect is achieved, and the eccentric assembly is suitable for different filled soil qualities;

2. when in storage, the rammer and the operating handle rotate oppositely, so that the occupied area of the compaction device can be reduced, the storage and the transportation are convenient, and meanwhile, the rammer and the operating handle are relatively fixed.

Drawings

FIG. 1 is a schematic structural view of an embodiment;

FIG. 2 is an enlarged schematic view of area A of FIG. 1;

FIG. 3 is a schematic view showing the construction of the eccentric member interconnecting in the embodiment;

FIG. 4 is an exploded schematic view of the ram of the embodiment;

FIG. 5 is a schematic structural view of the rammer in the embodiment in a storage state;

fig. 6 is an exploded view of the tray and the buffer device in the embodiment.

Description of reference numerals: 1. a tray; 11. cushion blocks; 12. a first bearing housing; 13. clamping a frame; 14. positioning blocks; 15. blocking strips; 16. a soil guard plate; 2. an operating handle; 21. rotating the rod; 22. a handle; 3. a rammer; 31. a second bearing housing; 32. a connecting frame; 33. a hammer plate; 34. an expansion board; 341. cutting; 35. a set screw; 36. a slide bar; 361. a strip-shaped hole; 37. a set screw; 4. a drive device; 41. a fixed mount; 42. a drive motor; 421. a driving wheel; 43. a drive shaft; 44. a driven wheel; 45. a drive wheel; 46. connecting a belt; 47. a connecting shaft; 48. a connecting wheel; 49. a drive belt; 5. an eccentric assembly; 51. an eccentric member; 511. a connecting strip; 5111. accommodating grooves; 512. a balancing weight; 5121. connecting grooves; 5122. a threaded hole; 513. an arc-shaped strip; 52. a connecting screw; 6. a slot; 7. a fixing hole; 8. a buffer device; 81. erecting strips; 811. a clamping block; 82. a buffer strip; 83. a buffer spring; 84. a limiting plate; 9. and fixing the magnet.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

A foundation pit backfill soil compacting device comprises a tray 1, wherein one side of the tray 1 is hinged with an operating handle 2, the other side of the tray is provided with a rammer 3, and the foundation pit backfill soil compacting device further comprises a driving device 4 and an eccentric assembly 5 which are used for driving the rammer 3 to swing up and down, and a buffer device 8 which is used for slowing down the upward swing impact force of the rammer 3.

As shown in fig. 1, the driving device 4 includes a fixing frame 41 fixedly connected to the upper side of the tray 1, a driving motor 42 is fixedly installed on the upper side of the fixing frame 41, and a driving wheel 421 is fixedly connected to an output shaft of the driving motor 42. The equal fixedly connected with cushion 11 in one end both sides that operating handle 2 was kept away from to tray 1, the first bearing frame 12 of cushion 11 upside fixedly connected with, rotate between two first bearing frames 12 and be connected with drive shaft 43. The driving wheel 45 is fixedly sleeved in the middle of the driving shaft 43, the driven wheel 44 is fixedly sleeved at one end of the driving shaft, and two connecting belts 46 are sleeved between the driven wheel 44 and the driving wheel 421. One end of the rammer 3 is hinged to the driving shaft 43, two sides above the other end of the rammer 3 are fixedly connected with the second bearing blocks 31, a connecting shaft 47 is rotatably connected between the two second bearing blocks 31, and a connecting wheel 48 is fixedly sleeved in the middle of the connecting shaft 47. A driving belt 49 is sleeved between the connecting wheel 48 and the driving wheel 45, and the two sides of the connecting wheel 48 are both connected with the eccentric assemblies 5.

After the driving motor 42 is started, the driving wheel 421 rotates to drive the driven wheel 44 to rotate through the transmission of the connecting belt 46, so as to drive the driving shaft 43 and the driving wheel 45 to rotate, and drive the connecting wheel 48 and the connecting shaft 47 to rotate through the transmission of the driving belt 49, so as to drive the eccentric assembly 5 to rotate around the connecting shaft 47. The rammer 3 swings up and down around the driving shaft 43 under the action of centrifugal force, and further continuously strikes the filled soil to play a compaction role. When eccentric subassembly 5 rotated to the upside, the one end that operating handle 2 was kept away from to tray 1 also can lift under the centrifugal force effect, and then reduces the friction, and the operating personnel of being convenient for promotes compaction device and removes. The diameter of the driven wheel 44 is larger than that of the driving wheel 421, and the diameter of the connecting wheel 48 is larger than that of the driving wheel 45, so that the speed reduction effect is achieved, and the time required by one rotation of the connecting wheel 48 is reduced.

As shown in fig. 2, the eccentric assembly 5 includes three eccentric members 51 disposed around the axial line of the connecting wheel 48, and the maximum number of the eccentric members 51 directly connected to the connecting wheel 48 can be adjusted according to actual requirements, such as 4 or 5. The eccentric part 51 comprises a connecting strip 511 connected with the outer edge of the connecting wheel 48 through a connecting screw 52, one end of the connecting strip 511 extending out of the connecting wheel 48 is fixedly connected with a balancing weight 512, and the other end is fixedly connected with an arc strip 513. The eccentric member 51 has a center of gravity spaced from the axis of the connecting wheel 48 so that the eccentric assembly 5 can generate a centrifugal force after rotating. The adjacent arc-shaped strips 513 are tightly attached, and the adjacent balancing weights 512 are tightly attached, so that the two adjacent eccentric parts 51 are tightly attached, and any eccentric part 51 cannot rotate around the connecting screw 52, the relative fixing effect is good, and the trouble that the connecting screw 52 is loosened in the rotating process is avoided.

After the connecting screw 52 is unscrewed, the eccentric part 51 can be detached, so that the gravity of the eccentric assembly 5 can be conveniently adjusted, the weight and the gravity center of the eccentric assembly 5 can be further adjusted, the acting force of the rammer 3 can be adjusted to be suitable for different soil qualities, and the application range is wide. When the number of the eccentric members 51 is adjusted, two eccentric members 51 which are closely attached to each other and connected to the connecting wheel 48 are always kept to avoid the trouble of rotating the eccentric members 51.

As shown in fig. 2 and 3, the weight 512 has a thickness twice that of the connecting strip 511 and a width larger than that of the connecting strip 511, and the weight 512 is flush with the side of the connecting strip 511 facing the connecting wheel 48. The balancing weight 512 is provided with a connecting groove 5121 for the connecting strip 511 to be completely clamped in on the side away from the connecting wheel 48, the bottom of the connecting groove 5121 is communicated with a threaded hole 5122 for the connecting screw 52 to be screwed in, and a containing groove 5111 for the head of the connecting screw 52 to be clamped in is arranged on the side surface facing the connecting wheel 48 when the connecting strip 511 is connected with the connecting wheel 48. After one eccentric part 51 is removed, the eccentric part 51 is reversely buckled on one eccentric part 51 connected with the connecting wheel 48, the connecting strip 511 is clamped into the connecting groove 5121, the connecting screw 52 is screwed into the threaded hole 5122, the relative fixation of the two parts can be completed, and therefore, the gravity center of the eccentric assembly 5 can be adjusted to be far away from the axial line of the connecting wheel 48, and the acting force of the rammer 3 is increased. Meanwhile, the number of the eccentric parts 51 indirectly connected with the connecting wheel 48 can be increased, and the weight of the eccentric assembly 5 can be adjusted.

As shown in fig. 3, the length of the connecting bar 511 is greater than that of the connecting groove 5121, so that when the connecting bar 511 is clamped into the connecting groove 5121 and the arc-shaped bar 513 is tightly attached to the counterweight block 512, a gap for clamping another arc-shaped bar 513 is formed between the two counterweight blocks 512, and further, the eccentric member 51 can be connected two or even three outward, and only the eccentric member 5 needs to be ensured not to hit the ram 3 and the driving shaft 43 during the rotation process.

As shown in fig. 1 and 4, the rammer 3 includes two connecting frames 32 rotatably connected to the driving shaft 43, the upper sides of the ends of the two connecting frames 32 far away from the driving shaft 43 are fixedly connected to the second bearing housings 31, and a hammer plate 33 is fixedly connected between the lower sides of the two connecting frames 32, and the distance between the hammer plate 33 and the axial line of the connecting wheel 48 is greater than the distance between the outer edge of the eccentric member 51 and the axial line of the connecting wheel 48. The two sides of the hammer plate 33 are provided with the expansion plates 34, one end of each expansion plate 34 facing the hammer plate 33 is fixedly connected with two inserting strips 341, one end of each hammer plate 33 facing the expansion plates 34 and one end of each expansion plate 34 facing away from the hammer plate 33 are provided with slots 6 for inserting the corresponding inserting strips 341, so that the number of the expansion plates 34 can be increased or the expansion plates 34 can be detached from the two sides of the hammer plate 33 according to actual requirements, the acting area can be adjusted according to the backfilling area, the tamping efficiency is improved, and the pressure of the tamping hammer 3 can be adjusted. The upper sides of the hammer plate 33 and the expansion plate 34 are respectively provided with two fixing holes 7 communicated with the slot 6, the fixing holes 7 are provided with fixing screws 35 in threaded connection with the insertion strips 341, and the expansion plate 34 can be detached after the fixing screws 35 are unscrewed.

As shown in fig. 4 and 5, the operating handle 2 includes two rotating rods 21 hinged to the tray 1, and a handle 22 is fixedly connected between ends of the two rotating rods 21 far away from the tray 1. The two opposite sides of the two connecting frames 32 are respectively provided with a slide bar 36 used for limiting the grab handle 22, the slide bars 36 are connected with the connecting frames 32 through two positioning screws 37, and the slide bars 36 are provided with strip-shaped holes 361 for the positioning screws 37 to pass through. When the rammer 3 rotates around the driving shaft 43 until leaning against the driving motor 42, the sliding strip 36 is in a vertical state and can slide up and down, at the moment, the operating handle 2 is rotated until the grab handle 22 is tightly attached to the upper side of the connecting frame 32, then the positioning screw 37 is unscrewed, the sliding strip 36 moves upwards and protrudes relative to the connecting frame 32, the grab handle 22 is limited by the sliding strip 36 and cannot rotate, and finally the positioning screw 37 is screwed down. The rammer 3 and the operating handle 2 are relatively fixed, so that the rammer is convenient to store, place and transport.

As shown in fig. 1 and 6, a buffer device 8 is arranged on the upper side of the tray 1, the buffer device 8 comprises two vertical bars 81 which are tightly attached to the tray 1 and are opposite to the connecting frame 32, a buffer bar 82 is fixedly connected to one side of the upper end of the vertical bars 81, which faces the rammer 3, and the buffer bar 82 extends to the upper side of the connecting frame 32 and is fixedly connected to one side of the connecting frame 32, which faces the buffer spring 83. When the gravity of eccentric assembly 5 is large, the centrifugal force applied to rammer 3 is too large and the easy lifting distance is too high, so that rammer 3 is turned toward driving motor 42, and buffer spring 83 can play a role of blocking and limit the lifting distance of rammer 3. Simultaneously, the rammer 3 gives a counterforce when falling, improves the compaction effect, and is suitable for filling soil with harder soil quality. Limiting plates 84 fixedly connected with the buffer strips 82 are arranged on two sides of the buffer spring 83, and the distance between the two limiting plates 84 is larger than the thickness of the connecting frame 32, so that the connecting frame 32 can be clamped between the two limiting plates 84. The stopper plate 84 can limit the cushion spring 83, and prevent the cushion spring 83 from deviating after being impacted by the link 32.

As shown in fig. 1 and 6, the two sides of the lower end of the vertical bar 81 are fixedly connected with the fixture blocks 811, the two sides of the vertical bar 81 of the tray 1 are fixedly connected with the fixture frames 13 for the fixture blocks 811 to be clamped in, and the fixture frames 13 are L-shaped, so that the vertical bar 81 can move towards or away from the rammer 3 along the length direction of the fixture frames 13. Tray 1 deviates from one side fixedly connected with locating piece 14 of link 32 in vertical strip 81, articulates in the opposite side has blend stop 15, and locating strip and blend stop 15 can carry on spacingly to vertical strip 81 for vertical strip 81 can't remove, guarantees the stability of its effect. Rotate blend stop 15 until with blend stop 15 dislocation back, found strip 81 just can follow and take out between two card frames 13, and then pull down buffer 8 to be convenient for accomodate and place. When the barrier strip 15 rotates to be tightly attached to the vertical strip 81, the fixed magnet 9 is embedded and fixed in one side of the barrier strip 15 opposite to the tray 1, so that the barrier strip 15 is not easy to rotate under the action of magnetic force, and the stability of fixing the vertical strip 81 is ensured. The one end fixedly connected with that operating handle 2 was kept away from to tray 1 keeps off native board 16, avoids the trouble that soil fell on tray 1 among the compaction process, hits the belt.

A foundation pit backfill soil compacting method comprises the following steps:

step 1: adjusting the weight of the eccentric component 5 according to the soil quality, if the soil quality is hard, increasing the number of the eccentric parts 51, fixing the newly added eccentric part 51 on the original eccentric part 51 through a connecting screw 52, or detaching the eccentric parts 51 at the two sides from the connecting wheel 48 and then fixing the eccentric parts 51 at the middle part; if the soil quality is softer, the number of the eccentric parts 51 is reduced;

step 2: the driving motor 42 is started, the driving wheel 421 drives the driven wheel 44 to rotate through the connecting belt 46, the driving shaft 43 is further driven to rotate, the driving wheel 45 drives the connecting wheel 48 to rotate through the driving belt 49, the eccentric assembly 5 is further driven to rotate around the axial lead of the connecting wheel 48, centrifugal force is formed, the rammer 3 is driven to rotate in a reciprocating mode to hammer and compact the filled soil, and an operator holds the holding handle 22 to push the tray 1 to move, so that the filled soil is compacted.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.

Claims

1. The utility model provides a foundation ditch backfill compaction device, includes tray (1), operating handle (2), ram (3) and drive arrangement (4), drive arrangement (4) are including installing in mount (41) of tray (1) upside, install driving motor (42) on mount (41), driving motor (42) are connected with action wheel (421), tray (1) one end both sides all are connected with cushion (11), cushion (11) upside is connected with first bearing frame (12), two it is connected with drive shaft (43) to rotate between first bearing frame (12), drive shaft (43) fixed cup joint has from driving wheel (44) and drive wheel (45), cup joint between follow driving wheel (44) and action wheel (421) and connect belt (46), ram (3) are articulated with drive shaft (43) and the upper end both sides all are connected with second bearing frame (31), two it is connected with connecting axle (47) to rotate between second bearing frame (31), connecting axle (47) fixed cover has connect fifth wheel (48), drive belt (49), its characterized in that have cup jointed between fifth wheel (48) and drive wheel (45): the improved rammer is characterized in that both sides of the connecting wheel (48) are connected with eccentric assemblies (5), each eccentric assembly (5) comprises a plurality of eccentric parts (51) arranged around the axial lead of the connecting wheel (48), each eccentric part (51) comprises a connecting strip (511), one end of each connecting strip (511) is connected with the corresponding connecting wheel (48) through a connecting screw (52), the other end of each connecting strip is connected with a balancing weight (512), one side of each balancing weight (512) is provided with a connecting groove (5121) for clamping the connecting strip (511), the bottom of each connecting groove (5121) is communicated with a threaded hole (5122) for screwing the connecting screw (52), each rammer (3) comprises two connecting frames (32) rotatably connected with a driving shaft (43), a hammer plate (33) is connected between the lower sides of the ends, far away from the driving shaft (43), of the connecting frames (32), and a buffer device (8) is arranged on the, buffer (8) include upright strip (81) of hugging closely with tray (1), upright strip (81) upper end is connected with buffer strip (82) that extend link (32) upside, buffer strip (82) are connected with buffer spring (83) towards one side of link (32), buffer strip (82) both sides all are connected with limiting plate (84), two the interval of limiting plate (84) is greater than the thickness of link (32).

2. A foundation pit backfill compaction device according to claim 1 and further comprising: one side of the connecting strip (511) is provided with a containing groove (5111) for clamping the head of the connecting screw (52).

3. A foundation pit backfill compaction device according to claim 1 and further comprising: one end of the connecting strip (511) departing from the eccentric component (5) is connected with an arc strip (513), the adjacent arc strip (513) is tightly attached, and the length of the connecting strip (511) is greater than that of the connecting groove (5121).

4. A foundation pit backfill compaction device according to claim 1 and further comprising: hammer block (33) both sides all are provided with expansion board (34), one end fixedly connected with cutting (341) of expansion board (34) orientation hammer block (33), hammer block (33) all are provided with confession cutting (341) male slot (6) towards the one end of expansion board (34) and expansion board (34) deviating from hammer block (33), expansion board (34) upside are provided with fixed orifices (7), fixed orifices (7) department is provided with set screw (35) with cutting (341) threaded connection.

5. A foundation pit backfill compaction device according to claim 1 and further comprising: the vertical bar (81) lower extreme both sides all are connected with fixture block (811), tray (1) is connected with card frame (13) that supply fixture block (811) card to go into in vertical bar (81) both sides, tray (1) is connected with locating piece (14) in one side that vertical bar (81) deviates from link (32), articulates in the opposite side has blend stop (15), blend stop (15) and tray (1) department of correspondence all are provided with fixed magnetite (9).

6. A foundation pit backfill compaction device according to claim 1 and further comprising: operating handle (2) include with tray (1) articulated dwang (21), two be connected with grab handle (22), two between the one end that tray (1) was kept away from in dwang (21) link (32) one side of the back of the body of carrying on the back all is provided with draw runner (36) that are used for spacing grab handle (22), be connected through two set screw (37) between draw runner (36) and link (32), draw runner (36) are provided with strip hole (361) that supply set screw (37) to pass.

7. A foundation pit backfill compaction device according to claim 1 and further comprising: one end of the tray (1) far away from the operating handle (2) is connected with a soil retaining plate (16).

8. A foundation pit backfill compaction method, which relates to the foundation pit backfill compaction device of any one of claims 1 to 7, and is characterized by comprising the following steps:

step 1: adjusting the weight of the eccentric component (5) according to the soil quality, if the soil quality is hard, increasing the number of the eccentric parts (51), fixing the newly added eccentric parts (51) on the original eccentric parts (51) through connecting screws (52), or detaching the eccentric parts (51) at the two sides from the connecting wheel (48) and then fixing the eccentric parts (51) at the middle part; if the soil quality is softer, the number of the eccentric parts (51) is reduced;

step 2: the driving motor (42) is started, the driving wheel (421) drives the driven wheel (44) to rotate through the connecting belt (46), the driving shaft (43) is further enabled to rotate, the driving wheel (45) drives the connecting wheel (48) to rotate through the driving belt (49), and therefore the eccentric assembly (5) rotates around the axial lead of the connecting wheel (48), centrifugal force is formed, and the rammer (3) is driven to rotate in a reciprocating mode to hammer and compact the filling soil.