Vibration compaction equipment

Abstract

To solve the problem of a conventional track tamping device that it is difficult to reduce weight or size.SOLUTION: In a vibrating compaction device 10 of the present invention, a vibrating rotating shaft 27 and a vibrating part 13 are arranged inside a housing body part 14. Vibrating plates 34 constituting the vibrating part 13 are dividedly arranged on a lower end side of the vibrating rotating shaft 27. And the vibrating plates 34 are arranged between bearings 31, 32, 33 arranged on the vibration rotating shaft 27. Thanks to this structure, when the vibrating rotating shaft 27 rotates, external force that the vibrating rotating shaft 27 receives from the vibration plates 34 is dispersed, and a deflection amount of the vibrating rotating shaft 27 is reduced. Further, by increasing a contact area between the housing body part 14 and the bearings 31, 32, 33, external force that the housing body part 14 receives from the vibrating plates 34 is dispersed. As a result, a selection width of materials for the vibrating rotating shaft 27 and the housing body 14 is increased, and the size and weight of the vibrating compaction device 10 can be reduced.SELECTED DRAWING: Figure 3A

Description

[Technical Field]

[0001] The present invention relates to a vibratory compaction device. [Background technology]

[0002] A conventional track tamping device 100 (hereinafter referred to as "tamping device 100") has a structure shown in FIG. 7. FIG. 7A is a perspective view illustrating the conventional tamping device 100. FIG. 7B is an exploded side view illustrating the conventional tamping device 100.

[0003] 7A, the tamping device 100 mainly includes an engine 101, a fuel tank 102, a vibration unit 103, a tamping tool 104, a holding bar 105, and a pair of grips 106 and 107. With this structure, an operator can operate the holding bar 105 while holding the grips 106 and 107, and compact the ballast by pushing the tamping tool 104 into the ballast and vibrating it.

[0004] 7B, the vibration transmission section 108 of the vibration unit 103 mainly includes a vibration generation section 109 and a flexible shaft 110 connected to the vibration generation section 109, and the flexible shaft 110 is inserted into an insertion hole 114 inside the tamping tool 104. Meanwhile, the vibration generation section 109 is directly connected to a connection section 113 provided at an end of a rotation shaft 115 of the engine 101 via a connection section 112 provided at an end of the rotation shaft 111 (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2014-12984 Summary of the Invention [Problem to be solved by the invention]

[0006] 7B, in the tamping device 100, the rotating shaft 115 of the engine 101 and the rotating shaft 111 of the vibration generating unit 109 are directly connected via connectors 112 and 113, and the rotational force of the engine 101 is transmitted as the rotational force of the vibration generating unit 109. The vibration generating unit 109 is an eccentric cam provided at the center of the rotating shaft 111, and generates vibrations when the eccentric cam rotates using the rotational force. The vibration generating unit 109 transmits the vibrations to the tamping tool 104 via the flexible shaft 110, thereby enabling the ballast to be compacted as described above.

[0007] With this structure, the tamping device 100 is inserted into the ballast from the tip of the tamping tool 104. The tip of the tamping tool 104 has the longest contact time with the ballast and is the area that transmits the vibrations to the ballast the most.

[0008] However, in the tamping device 100, the vibration generating section 109 is disposed in the vibration unit 103 above the tamping tool 104, and therefore the vibration is transmitted to the tamping tool 104 and its tip portion via the flexible shaft 110. As a result, there is a problem that the vibration is easily attenuated, making it difficult to obtain the desired vibration strength.

[0009] On the other hand, if the eccentric cam is enlarged to compensate for the amount of vibration damping, a new problem arises in that the tamping device 100 becomes larger and the total weight becomes heavier. On the other hand, if the amount of eccentric cam is increased, a new problem arises in that the total weight of the tamping device 100 also becomes heavier.

[0010] Furthermore, the tamping device 100 has a structure in which the holding bar 105 is connected to the side of the housing of the vibration unit 103, which causes a problem in that the vibrations generated by the vibration generating unit 109 are transmitted directly to the holding bar 105. Specifically, the vibrations transmitted to the holding bar 105 are transmitted to the worker as vibrations at hand, making it difficult for the worker to sense the subtle hardness and condition of the ballast during compaction, which may result in a decrease in work efficiency.

[0011] The present invention has been made in consideration of the above circumstances, and provides a vibration compaction device that reduces the amount of vibration damping by dividing and arranging a vibration plate on the vibration rotation axis at the lower end of the housing part, thereby making the device smaller and lighter. [Means for solving the problem]

[0012] The vibration compaction device of the present invention comprises a housing unit, a vibration unit arranged inside the housing unit, a drive unit that drives the vibration unit, a connecting mechanism that connects the drive rotation shaft of the drive unit to the vibration rotation shaft on which the vibration unit is arranged, and a bearing unit arranged inside the housing unit and that rotatably supports the vibration rotation shaft, wherein multiple bearing units are arranged on the lower end side of the vibration rotation shaft, the vibration units are vibration plates fixed to the vibration rotation shaft, and the vibration plates are arranged in sections between the bearing units in the extension direction of the vibration rotation shaft.

[0013] In addition, the vibration compaction device of the present invention further comprises a compaction unit fixed to the lower end side of the housing unit, the compaction unit having an attachment unit for fixing to the housing unit and a vibration transmission unit for transmitting vibration to the ballast, and the vibration plate is arranged in an area that does not overlap with the vibration transmission unit in the extension direction of the vibration rotation axis, or has an overlapping area with the vibration transmission unit that is 20% or less of the length of the arrangement area of ​​the vibration plate.

[0014] In addition, the vibration compaction device of the present invention further comprises a compaction unit fixed to the lower end side of the housing unit, the compaction unit having an attachment portion for fixing to the housing unit, a vibration transmission unit for transmitting vibration to the ballast, and a blade formed on the outer surface of the vibration transmission unit, and the vibration plate has an overlap area with the blade in the extension direction of the vibration rotation axis that is 15% or less of the length of the arrangement area of ​​the vibration plate.

[0015] In the vibration compaction device of the present invention, the housing and the vibration rotation shaft are formed from aluminum or an aluminum alloy.

[0016] In addition, in the vibration compaction device of the present invention, the bearing portion has a bearing housing portion and a bearing that rotates inside the bearing housing portion, and the bearing housing portion is fixed to the housing portion with its outer surface in contact with the inner surface of the housing portion.

[0017] In addition, in the vibration compaction device of the present invention, the drive unit is an engine or a battery-powered motor. [Effects of the Invention]

[0018] In the vibration compaction device of the present invention, the vibration plate constituting the vibration section is disposed separately at the lower end of the vibrating rotation shaft. The vibration plate is disposed between the bearing sections disposed on the vibrating rotation shaft. This structure distributes the external force that the vibrating rotation shaft receives from the vibration plate when the vibrating rotation shaft rotates, reducing the amount of deflection of the vibrating rotation shaft. Furthermore, the increased contact area between the housing section and the bearing section distributes the external force that the housing section receives from the vibration plate. As a result, the range of materials that can be selected for the vibrating rotation shaft and the housing section is expanded, allowing for a smaller and lighter vibrating compaction device.

[0019] In the vibration compaction device of the present invention, the vibration plate is arranged in an area in the extension direction of the vibration rotation shaft that does not overlap with the vibration transmission part, or the overlapping area with the vibration transmission part is 20% or less of the length of the arrangement area of ​​the vibration plate. With this structure, the vibration part is arranged not at the tip of the vibration rotation shaft but in the vicinity of the vibration transmission part, so that vibrations generated by the vibration part are efficiently transmitted to the ballast via the vibration transmission part.

[0020] In addition, in the vibration compaction device of the present invention, the vibration plate has an overlap area with the blade in the extension direction of the vibration rotation shaft that is 15% or less of the length of the vibration plate's arrangement area. With this structure, the vibration unit is located not at the very tip of the vibration rotation shaft but near the vibration transmission unit and blade, so that vibrations generated by the vibration unit are efficiently transmitted to the ballast via the vibration transmission unit and blade.

[0021] In addition, in the vibration compaction device of the present invention, the housing and the vibration rotation shaft are made of aluminum or an aluminum alloy, which structure makes it possible to reduce the weight of the vibration compaction device.

[0022] In addition, in the vibration compaction device of the present invention, the bearing unit includes a bearing housing unit and a bearing that rotates inside the bearing housing unit. This structure reinforces the strength of the housing unit with the bearing housing unit, and prevents the bearing from rotating in direct contact with the inner peripheral surface of the housing unit. As a result, the housing unit can be made lighter while maintaining its durability.

[0023] Furthermore, in the vibratory compaction device of the present invention, the drive unit is an engine or a battery-powered motor. This structure eliminates the need for an external power source to power the drive unit, realizing a cordless power supply. This allows workers to work without being restricted by a power cord, improving work efficiency. Furthermore, the cordless power supply allows workers to concentrate on ballast compaction work without worrying about track short circuits, improving work efficiency. [Brief explanation of the drawings]

[0024] [Figure 1] 1 is a perspective view illustrating a vibration compaction device according to one embodiment of the present invention. [Figure 2] 1 is a side view illustrating a vibration compaction device according to one embodiment of the present invention. [Figure 3A] 1 is a cross-sectional view illustrating a vibration compaction device according to one embodiment of the present invention. [Figure 3B]1 is an exploded perspective view illustrating a vibration compaction device according to one embodiment of the present invention. [Figure 4] FIG. 2 is a rear view illustrating the vibration compaction device according to one embodiment of the present invention. [Figure 5] 1 is a cross-sectional view illustrating a vibration compaction device according to one embodiment of the present invention. [Figure 6] 1 is a cross-sectional view illustrating a vibration compaction device according to one embodiment of the present invention. [Figure 7A] FIG. 10 is a perspective view illustrating a conventional tamping device. [Figure 7B] FIG. 10 is an exploded side view illustrating a conventional tamping device. DETAILED DESCRIPTION OF THE INVENTION

[0025] A vibration compaction device 10 according to one embodiment of the present invention will be described in detail below with reference to the drawings. In describing this embodiment, the same reference numerals will be used for the same components, and repeated explanations will be omitted.

[0026] In addition, the up-down direction indicates the height direction of the vibration compaction device 10, the left-right direction indicates the width direction when the vibration compaction device 10 is viewed from the front, and the front-to-back direction indicates the depth direction of the vibration compaction device 10.

[0027] FIG. 1 is a perspective view illustrating a vibration compaction apparatus 10 of this embodiment. FIG. 2 is a side view illustrating a vibration compaction apparatus 10 of this embodiment. FIG. 3A is a cross-sectional view illustrating the vibration unit 13 of the vibration compaction apparatus 10 of this embodiment. FIG. 3B is an exploded perspective view illustrating the vibration unit 13 of the vibration compaction apparatus 10 of this embodiment. FIG. 4 is a rear view illustrating the compaction unit 15 of the vibration compaction apparatus 10 of this embodiment. FIG. 5 is a cross-sectional view illustrating a connecting mechanism 16 of the vibration compaction apparatus 10 of this embodiment. FIG. 6 is a cross-sectional view illustrating a modified example of the compaction unit 15 of the vibration compaction apparatus 10 of this embodiment. For convenience of explanation, FIG. 5 shows a partial cross-section focusing on the connecting mechanism 16.

[0028] As shown in Figures 1 and 2, the vibration compaction device 10 mainly comprises a drive unit 11 consisting of an engine, a fuel tank 12 for storing fuel to be supplied to the drive unit 11, a vibration unit 13 (see Figure 3) that vibrates using power from the drive unit 11, a housing unit 14 that houses the vibration unit 13 inside, a compaction unit 15 that is fixed to the tip of the housing unit 14, a connecting mechanism 16 (see Figure 4) that connects the drive rotation shaft 21B (see Figure 4) that transmits the power of the drive unit 11 to the vibration rotation shaft 27 (see Figure 3) to which the vibration unit 13 is fixed, vibration-damping rubber 17 that damps vibrations generated by the vibration unit 13 etc., a handle unit 18 for operating the housing unit 14, and a support frame 19 that connects the vibration-damping rubber 17.

[0029] An example of the vibratory compaction device 10 is a tie tamper, in which part of the housing 14 and the compaction unit 15 are inserted into the ballast (not shown). The vibratory compaction device 10 mainly compacts the ballast by transmitting vibrations from the compaction unit 15 to the ballast and striking the ballast below the sleepers (not shown). Note that the vibrations transmitted from the vibrating unit 13 are also transmitted to the ballast via the housing 14.

[0030] For example, a freely tiltable four-stroke engine, GX35 manufactured by Honda Motor Co., Ltd., is used as the drive unit 11, and the drive unit 11 is driven by fuel supplied from a fuel tank 12. The drive unit 11 is fixed to a first support frame 19A, which is part of the support frame 19, and is disposed in the internal space of the handle unit 18. Meanwhile, the fuel tank 12 is disposed adjacent to the side of the drive unit 11, and supplies fuel to the drive unit 11 via a fuel hose (not shown).

[0031] With this structure, the vibratory compaction device 10 does not need to supply power from an external power source such as a generator to the drive unit 11, and does not require a power cord to connect the drive unit 11 to the external power source. As a result, the vibratory compaction device 10 is cordless, eliminating the need for workers to transport and install generators and power cords, and also eliminating the need for workers to extend the power cord depending on the scope of work.

[0032] Furthermore, the worker does not need to handle the power cord carefully to prevent it from getting tangled in the rail (not shown) or sleepers during work. As a result, the worker can insert part of the housing 14 or the compaction unit 15 into the ballast from the direction that is easiest for working on the sleepers using the handle 18, significantly improving work efficiency. In addition, the absence of a power cord allows the worker to concentrate on compacting the ballast without worrying about track short circuits, improving work efficiency.

[0033] A track short circuit occurs when multiple tie tampers, which receive power from a conventional generator via a power cord, are used simultaneously and the tie tampers are connected to each other via the earth wire of the generator cable, causing a short circuit that occurs when one tie tamper touches one side of a pair of rails. This track short circuit can cause a malfunction signal to be sent to crossing gates at railroad crossings, etc. Furthermore, a train will be present at the point where the track short circuit occurs, disrupting traffic control.

[0034] The housing 14 is a cylindrical pipe member made of, for example, aluminum or an aluminum alloy. The housing 14 has an inner diameter of 60 mm, a length of 690 mm, and a plate thickness of 5 mm, for example. The upper end side of the housing 14 is fixed to a second support frame 19B that constitutes the support frame 19. As will be described in detail later, the housing 14 houses a vibration rotation shaft 27 and a vibration unit 13 fixed to the vibration rotation shaft 27 inside, causing the housing 14 itself to vibrate. In other words, the vibration generated by the vibration unit 13 is transmitted to the compaction unit 15 via the housing 14.

[0035] The compacting unit 15 is detachably fixed to the lower end side of the housing unit 14. The compacting unit 15 is Although it repeatedly collides with the ballast during operation, it has the desired rigidity and durability by being formed using, for example, carbon steel pipe for mechanical structures, alloy steel for mechanical structures, or carbon steel for mechanical structures, etc. The compacting unit 15 has an attachment part 15A for attachment to the housing part 14 and a vibration transmission part 15B inserted into the ballast.

[0036] 3A, the vibration unit 13 is disposed inside the housing 14, and mainly comprises bearings 31, 32, and 33 that rotatably support the vibration rotation shaft 27, and a plurality of vibration plates 34 disposed between the bearings 31, 32, and 33. The bearings 31, 32, and 33 are each rotatably disposed inside a bearing housing 39, as will be described in detail later.

[0037] The vibration rotation shaft 27 is disposed along the longitudinal direction of the housing 14. The vibration rotation shaft 27 is, for example, a pipe member made of aluminum or an aluminum alloy.

[0038] Here, the dashed dotted line 30 indicates the axis 14A of the housing 14, and the vibration rotation shaft 27 is supported by the housing 14 via a plurality of bearings 23 (see FIG. 4), 31, 32, and 33 so that the axis 27A of the vibration rotation shaft 27 substantially coincides with the axis 14A. The vibration rotation shaft 27 rotates integrally with the drive rotation shaft 21B of the drive unit 11 via the connecting mechanism 16. The vibration rotation shaft 27 is supported by the housing 14 near the second support frame 19B on the upper end side thereof via the bearing 23 and the bearing housing 39.

[0039] A plurality of vibration plates 34 are individually bolted to the vibration rotation shaft 27. The vibration plates 34 are plate-like bodies that are roughly semicircular in top view and are so-called eccentric cams. With this structure, the vibration plates 34 rotate integrally with the vibration rotation shaft 27, generating vibrations in the vibration unit 13. The vibrations generated in the vibration unit 13 are then transmitted to the housing unit 14 and the compaction unit 15, causing the housing unit 14 and the compaction unit 15 to vibrate.

[0040] 3B, in this embodiment, the bearings 23, 31, 32, and 33 are disposed inside a ring-shaped bearing housing portion 39. The bearing housing portion 39 is press-fitted into the housing portion 14 and is fixed without rotating relative to the housing portion 14. The bearings 23, 31, 32, and 33 rotate in contact with the bearing housing portion 39 and support the vibration rotation shaft 27. The bearings 23, 31, 32, and 33 are prevented from falling out of the bearing housing portion 39 by a locking member 39A.

[0041] With this structure, in the area where the vibrating part 13 is disposed, the housing part 14 has a reinforced structure in which it is supported from the inside at three points by the bearing housing part 39. Then, in the housing part 14, the area where the vibrating part 13 is disposed, which is subjected to large stress when the vibrating part 13 vibrates, has increased rigidity, which makes it possible to use the aluminum alloy and the like, thereby realizing weight reduction.

[0042] 3A, a mounting space 35 for accommodating and supporting a portion of the housing 14 is formed inside the compacting portion 15. An anodized aluminum support portion 36 is disposed in a fitted state in the mounting space 35. The support portion 36 has a first positioning portion 36A that abuts against the tip of the housing 14 and a second positioning portion 36B that abuts against the housing of the bearing 33.

[0043] The first positioning portion 36A is an intermediate portion of the support portion 36 and is formed in an annular shape along its outer circumferential surface. The housing portion 14 is inserted into the mounting space 35 in contact with the inner circumferential surface of the compacting portion 15, and its tip portion contacts the upper surface of the first positioning portion 36A.

[0044] The second positioning portion 36B is formed in a cylindrical shape and is inserted into the housing portion 14. In the mounting space 35, the housing portion 14 is sandwiched between the inner circumferential surface of the compacting portion 15 and the second positioning portion 36B. The bearing housing portion 39, which houses the bearing 33, abuts against the upper surface of the second positioning portion 36B, thereby positioning the bearing 33 inside the housing portion 14.

[0045] As shown in the figure, bearing housing portion 39, which houses bearing 32, is positioned above bearing housing portion 39, which houses bearing 33, via positioning plate 37. Similarly, bearing housing portion 39, which houses bearing 31, is positioned above bearing housing portion 39, which houses bearing 32, via positioning plate 38. With this structure, vibration rotation shaft 27 rotates via bearings 31, 32, and 33 so as to substantially coincide with axis center 14A.

[0046] Furthermore, the outer peripheral surface of the second positioning portion 36B of the support portion 36 is externally threaded, and the inner peripheral surface of the housing portion 14 is internally threaded. The support portion 36 is then fastened to the housing portion 14 in a screw-tightened relationship. This structure makes it easy to remove and attach the support portion 36 when inspecting or replacing the vibration rotation shaft 27 or the vibration plate 34, improving the maintainability of the vibration compaction device 10.

[0047] As shown in FIG. 4, the compacting unit 15 has an attachment unit 15A and a vibration transmission unit 15B. The vibration transmission unit 15B has a base 15B1 that is generally hexagonal in cross section and a tip 15B2 that is generally conical. Here, as shown in FIG. 3A, in the compacting unit 15, for example, a cylindrical first base material 41 and a generally pencil-shaped second base material 42 are welded together. Around the periphery of the housing 14, the thickness t1 of the first base material 41 is, for example, 3 mm, the thickness t2 of the second base material 42 is, for example, 6 mm, and the thickness t3 of the second base material 42 is, for example, 9 mm.

[0048] As shown in the figure, mounting portion 15A has a cylindrical shape that is substantially the same as that of housing portion 14, and is disposed so as to cover the entire circumference along the outer circumferential surface of housing portion 14. Housing portion 14 is clamped and disposed inside mounting portion 15A, and both circumferential ends of mounting portion 15A are fastened by bolts 15A1 and nuts 15A2 at divided region 15A3, thereby mounting portion 15A to housing portion 14.

[0049] As described above, first base material 41 and second base material 42 are welded together in mounting portion 15A. Since mounting portion 15A has a thinner plate thickness than the other areas, mounting portion 15A can be easily opened via divided area 15A3 when assembling vibration compaction device 10 or removing compaction unit 15, improving workability.

[0050] Furthermore, because the mounting portion 15A covers approximately one-third of the area from the bottom end of the housing portion 14, the housing portion 14 is less likely to collide directly with the ballast during operation. The covering on the mounting portion 15A improves the durability of the housing portion 14 and prevents deformation of the housing portion 14. As a result, the above-mentioned aluminum alloys and the like can be used for the housing portion 14, and the weight of the vibration compaction device 10 can be reduced.

[0051] The vibration transmitter 15B has a base 15B1 disposed around the periphery of the housing 14 and a tip portion 15B2 formed at the tip of the base 15B1. The base 15B1 is formed contiguously with the tip of the mounting portion 15A and is formed from a portion of the second base material 42 having a plate thickness t3 of 9 mm. The outer peripheral surface of the base 15B1 is machined to have, for example, a generally hexagonal cross-sectional shape. Meanwhile, the tip portion 15B2 is formed contiguously with the tip of the mounting portion 15A and has a generally conical shape. For example, the vibration transmitter 15B has a shape resembling the tip side of a hexagonal pencil sharpened with a pencil sharpener.

[0052] With this structure, the operator uses the handle 18 to operate the tip 15B2 of the vibration transmission unit 15B, and inserts the compaction unit 15 into the ballast while utilizing the gaps between the ballast pieces. Then, with the compaction unit 15 and part of the housing 14 inserted inside the ballast, the operator can level the ballast by hooking it with the edge of the base 15B1, indicated by the circle 43. As a result, the compaction unit 15 can be easily inserted below a sleeper (not shown), compacting the ballast below the sleeper and preventing the sleeper from lifting up.

[0053] 3A, in the vibrating section 13 of this embodiment, two vibrating plates 34 are fixed between bearings 31 and 32, and another two vibrating plates 34 are fixed between bearings 32 and 33. In other words, the two vibrating plates 34 are arranged inside the housing section 14 in a state where they are separated by the bearing 32.

[0054] A plurality of vibration plates 34 are disposed on the lower end side of the vibration rotation shaft 27. The vibration plates 34 are disposed in a divided manner among the plurality of bearings 31, 32, and 33, thereby expanding the area in which the vibration plates 34 are disposed in the longitudinal direction of the vibration rotation shaft 27 (the vertical direction on the page). With this structure, the centrifugal force generated by the vibration plates 34 when the vibration rotation shaft 27 rotates is dispersed, the amplitude of the vibration rotation shaft 27 is narrowed, and the amount of deflection of the vibration rotation shaft 27 is suppressed. Furthermore, by increasing the contact area between the bearings 31, 32, and 33 and the housing 14 in the area in which the vibration plates 34 are disposed, the centrifugal force is dispersed and stress concentration on the housing 14 is suppressed.

[0055] As a result, the design strength of the housing 14 and the vibrating rotation shaft 27 can be relaxed, allowing the use of the above-mentioned aluminum alloy or the like as their materials, thereby realizing a lighter weight for the vibration compaction device 10. Also, by using a combined structure of multiple vibration plates 34, the size of each vibration plate 34 can be reduced. Furthermore, the smaller shape of the vibration plates 34 makes it possible to reduce the inner diameter of the housing 14, thereby realizing a smaller size for the housing 14, and therefore a smaller size for the vibration compaction device 10.

[0056] Furthermore, in this embodiment, the overlapping area between the vibration plate 34 and the vibration transmission part 15B of the compaction part 15 in the longitudinal direction of the vibration rotation shaft 27 can be set to 20% or less of the length L1 of the arrangement area of ​​the vibration plate 34. Incidentally, by adjusting the length of the second positioning part 36B of the support part 36, it is also possible to arrange the vibration plate 34 without overlapping with the vibration transmission part 15B. With this structure, the vibration part 13 is arranged not at the very tip of the vibration rotation shaft 27 but near the vibration transmission part 15B, thereby reducing the amount of attenuation of vibration generated by the vibration part 13. The vibration is then efficiently transmitted to the ballast via the vibration transmission part 15B. Furthermore, the above-mentioned bending phenomenon of the vibration rotation shaft 27 and the housing part 14 is also prevented.

[0057] As shown in the figure, the support portion 36 is arranged in the mounting space 35 of the vibration transmission portion 15B in a state where it bridges the housing portion 14 in the radial direction, and the support portion 36, housing portion 14, and compaction portion 15 are arranged integrally and in close contact with each other at the tip of the housing portion 14 by the screw fastening structure. Furthermore, the housing portion 14 and compaction portion 15 are also arranged integrally and in close contact with each other via the bearing housing portion 39. With this structure, the compaction portion 15 and housing portion 14 vibrate integrally, thereby reducing the attenuation of vibrations generated in the vibrating portion 13 and enabling the vibrations to be efficiently transmitted to the ballast.

[0058] In other words, by dividing the vibration plate 34, the amount of vibration generated is reduced compared to when the vibration plate 34 is arranged as a single unit, but by minimizing vibration transmission loss due to the close contact between each component, the vibration characteristics of the vibration compaction device 10 can be maintained.

[0059] 5, the drive unit 11 is disposed inside the handle portion 18 and fixed to the first support frame 19A. The drive transmission portion 21 of the drive unit 11 is disposed on the bottom side of the drive unit 11 and transmits power from the drive unit 11 to the vibration rotation shaft 27.

[0060] The drive transmission unit 21 mainly includes a clutch housing 21A that is attached to a clutch (not shown) on the bottom side of the drive unit 11, a drive rotation shaft 21B that is located in the center of the clutch housing 21A, and a bearing 21C that rotatably supports the drive rotation shaft 21B. As the rotation speed of the drive unit 11 increases, a clutch drum inside the clutch housing 21A comes into contact with the clutch and rotates, causing the drive rotation shaft 21B to also rotate. As shown in the figure, the drive transmission unit 21 is inserted into an opening 22 that opens in the center of the first support frame 19A. The drive unit 11 is fastened to the first support frame 19A with bolts.

[0061] The second support frame 19B is disposed below the first support frame 19A. Four vibration-proof rubber pieces 17 are bolted between the first support frame 19A and the second support frame 19B. The second support frame 19B also has an opening 24 that opens in its center. As described above, the housing 14 is inserted into the opening 24, and the housing 14 is welded to the second support frame 19B. The drive rotation shaft 21B of the drive transmission unit 21 is disposed inside the housing 14.

[0062] The connecting mechanism 16 mainly has a first shaft coupling part 26 attached to the drive rotation shaft 21B of the drive transmission part 21, a second shaft coupling part 28 attached to the vibration rotation shaft 27, and a connecting member 29 connecting the first shaft coupling part 26 and the second shaft coupling part 28.

[0063] The first shaft coupling 26 is, for example, a cylindrical metal cover member, into whose center the drive rotation shaft 21B is inserted. The first shaft coupling 26 and the drive rotation shaft 21B are connected by inserting the tip of a fixing bolt 26B that passes through the first shaft coupling 26 into an anti-rotation groove 26A provided in the drive rotation shaft 21B.

[0064] The second shaft coupling part 28 is, for example, a cylindrical metal cover member, into whose center the vibrating rotation shaft 27 is inserted. Then, by inserting a fixing bolt 26B that passes through the second shaft coupling part 28 up to a rotation-stop recess (not shown) provided on the vibrating rotation shaft 27, the second shaft coupling part 28 and the vibrating rotation shaft 27 are connected.

[0065] The connecting member 29 is a cylindrical rubber member, and a continuous wave shape is formed on the outer peripheral surface of the connecting member 29 in the circumferential direction. The upper end side of the connecting member 29 is inserted into the first shaft coupling part 26, and the lower end side of the connecting member 29 is inserted into the second shaft coupling part 28. The inner peripheral surfaces of the first and second shaft coupling parts 26, 28 also have wave shapes formed thereon to fit with the wave shapes. With this structure, the vibration rotation shaft 27 rotates integrally with the drive rotation shaft 21B of the drive part 11 via the connection mechanism 16, and the power of the drive part 11 is transmitted to the vibration part 13.

[0066] Furthermore, a structure is realized in which the drive rotation shaft 21B and the vibration rotation shaft 27 are connected via a connecting member 29, but are not directly connected to each other. As a result, vibrations generated in the vibrating section 13 are damped by the connecting member 29, and the vibrations transmitted from the vibration rotation shaft 27 to the drive rotation shaft 21B are significantly reduced.

[0067] Here, dashed dotted line 30 indicates axis 14A of housing 14, and in drive unit 11, drive rotation shaft 21B is less susceptible to the effects of vibrations from vibrating rotation shaft 27, and drive rotation shaft 21B rotates stably approximately coaxially with axis 14A indicated by dashed dotted line 30. As a result, damage to components of drive unit 11 and shortening of the lifespan of drive unit 11 are prevented, and abnormal noise from drive unit 11 is prevented.

[0068] As shown in the figure, a bearing 23 is disposed near the connecting member 29 on the upper end side of the vibrating rotation shaft 27, and the vibrating rotation shaft 27 is supported by the housing 14. With this structure, the vibrating rotation shaft 27 rotates stably on approximately the same axis as the axis 14A indicated by the dashed line 30.

[0069] Furthermore, handle portion 18 has a box-like structure with an internal space, and the tip of handle portion 18 is fixed to first support frame 19A. As described above, first support frame 19A and second support frame 19B are connected via four vibration-isolating rubbers 17. With this structure, vibrations transmitted from vibrating portion 13 to handle portion 18 are significantly reduced by vibration-isolating rubbers 17. As a result, vibrations at the worker's hands are significantly reduced, making it easier for the worker to grasp subtle ballast hardness and condition during work, improving work efficiency.

[0070] Finally, the vibration compaction apparatus 50 shown in Figure 6 differs from the vibration compaction apparatus 10 described using Figures 1 to 5 in the structure of its compaction unit 51. Therefore, the following description of the vibration compaction apparatus 50 will focus on the structure of the compaction unit 51, and the same components as those in the vibration compaction apparatus 10 will be designated by the same numbers, with reference to the description of Figures 1 to 5 above.

[0071] Compaction unit 51 has mounting portion 51A and vibration transmission portion 51B, and vibration transmission portion 51B has cylindrical base portion 51B1, generally conical tip portion 51B2, and blade 52. In compaction unit 51, for example, a cylindrical first base material 53 and a generally pencil-shaped second base material 54 are welded together. The thickness t4 of first base material 53 is, for example, 3 mm, and the thickness t5 of second base material 54 is, for example, 7 mm.

[0072] The compacting portion 51 is formed using, for example, a carbon steel pipe for mechanical structures, an alloy steel for mechanical structures, or a carbon steel pipe for mechanical structures, similar to the compacting portion 15. The structure of the mounting portion 51A is substantially the same as that of the mounting portion 15A, and therefore, the description of the mounting portion 51A described above is to be referred to and will not be repeated here.

[0073] The vibration transmitter 51B has a base 51B1 disposed around the housing 14 and a tip 51B2 formed at the tip of the base 51B1. The base 51B1 is formed contiguously with the tip of the mounting portion 51A and is made of a second base material 54 having a thickness t5 of 7 mm. The tip 51B2 is formed contiguously with the tip of the base 51B1 and has a substantially conical shape. For example, the vibration transmitter 15B has a shape similar to that of a round pencil with the tip side sharpened by a pencil sharpener.

[0074] Two blades 52 are formed on the outer peripheral surface of the base 51B1 and are arranged at intervals of approximately 180 degrees. The blades 52 have a generally trapezoidal shape in a side view so that the tip ends 51B2 form an acute angle, and the blade thickness is, for example, 9 mm.

[0075] With this structure, the worker uses the handle 18 to operate the tip 51B2 of the vibration transmission unit 51B and insert the compaction unit 51 into the ballast while utilizing the gaps between the ballast pieces. Then, with the compaction unit 51 and part of the housing 14 inserted inside the ballast, the worker can also use the blade 52 to transmit vibrations to the ballast and level the ballast while hooking it with the blade 52. As a result, the compaction unit 51 can be easily inserted below a sleeper (not shown), compacting the ballast below the sleeper and preventing the sleeper from lifting up.

[0076] Furthermore, when the vibratory compaction device 50 is in operation, a rotational repulsion generated by the drive unit 11 is applied to the handle unit 18, but when the blade 52 is inserted into the ballast and catches on the ballast, the rotational repulsion is received by the surface of the blade 52. As a result, the rotational reaction force received by the operator from the handle unit 18 is reduced, improving the operability of the vibratory compaction device 10 and improving work efficiency.

[0077] Furthermore, as shown in the figure, multiple vibration plates 34 are arranged on the lower end side of the vibrating rotation shaft 27. The vibration plates 34 are arranged separately among the multiple bearings 31, 32, and 33, thereby expanding the arrangement area of ​​the vibration plates 34 in the longitudinal direction of the vibrating rotation shaft 27. With this structure, the centrifugal force generated by the vibration plates 34 when the vibrating rotation shaft 27 rotates is dispersed, the amplitude of the vibration of the vibrating rotation shaft 27 is narrowed, and the amount of deflection of the vibrating rotation shaft 27 is suppressed. Furthermore, by increasing the contact area between the housing 14 and the bearing housing 39 in which the bearings 31, 32, and 33 are housed in the arrangement area of ​​the vibration plates 34, the centrifugal force is dispersed and stress concentration on the housing 14 is suppressed.

[0078] As a result, the design strength of the housing 14 and the vibrating rotation shaft 27 can be relaxed, allowing the aluminum alloy to be used as their material, thereby realizing a lighter weight vibrating compaction device 50. Also, by using a combined structure of multiple vibrating plates 34, the size of each individual vibrating plate 34 can be reduced. Furthermore, the smaller shape of the vibrating plates 34 allows the inner diameter of the housing 14 to be reduced, thereby realizing a smaller housing 14, and therefore a smaller vibrating compaction device 50.

[0079] Furthermore, in this embodiment, the overlapping area between the vibration plate 34 and the blade 52 of the compaction unit 51 in the length direction of the vibration rotation shaft 27 (the vertical direction on the page) can be set to 15% or less of the length L2 of the arrangement area of ​​the vibration plate 34. With this structure, the vibration unit 13 is arranged not at the very tip of the vibration rotation shaft 27 but in the vicinity of the vibration transmission unit 51B, thereby reducing the amount of attenuation of vibrations generated in the vibration unit 13. Then, the vibrations are efficiently transmitted to the ballast via the vibration transmission unit 51B. Furthermore, the above-mentioned bending phenomenon of the vibration rotation shaft 27 and the housing unit 14 is also prevented.

[0080] As shown in the figure, within the mounting space 35 of the vibration transmission unit 51B, the support unit 36 ​​is arranged in a state of bridging the housing unit 14 in the radial direction, and the support unit 36, housing unit 14, and compaction unit 51 are arranged integrally and in close contact with each other at the tip of the housing unit 14 by the screw fastening structure. Furthermore, the housing unit 14 and compaction unit 51 are also arranged integrally and in close contact with each other via the bearing housing unit 39. With this structure, the compaction unit 51 and housing unit 14 vibrate integrally, thereby reducing the amount of attenuation of vibrations generated in the vibrating unit 13 and enabling the vibrations to be efficiently transmitted to the ballast.

[0081] In this embodiment, an engine is used as the drive unit 11, but the present invention is not limited to this. For example, a battery-powered motor may be used as the drive unit 11. Even in this case, by placing the battery that drives the motor on the top surface of the motor, a cordless power supply can be realized, and the same effects as those described above can be obtained.

[0082] In addition, in the vibration section 13, two vibration plates 34 are fixed between the bearings 31 and 32, and two other vibration plates 34 are fixed between the bearings 32 and 33, but this is not limited to this case. For example, the number of vibration plates 34 in each divided area may be one or three, and any design change is possible depending on the amount of vibration to be generated. Also, the number of bearings arranged in the area where the vibration section 13 is arranged may be four, and the vibration section may be divided into three and arranged. In addition, various other changes are possible within the scope of the present invention. [Explanation of symbols]

[0083] 10,50 Vibration compaction equipment 11 Drive unit 12 Fuel tank 13 Vibration unit 14 Housing 14A shaft center 15,51 Compaction section 15A, 51A mounting part 15B, 51B vibration transmission part 15B1,51B1 base 15B2,51B2 Tip 16 Connection mechanism 17 Anti-vibration rubber 18 Handle 19 Support frame 19A First Support Frame 19B Second support frame 21 Drive transmission unit 21A Clutch housing 21B Drive shaft 23, 31, 32, 33 Bearings 26 First shaft coupling part 27 Vibration Rotation Axis 27A Axial center 28 Second shaft coupling 29 Connecting members 34 Vibration Plate 35 Mounting space 36 Support part 36A First positioning part 36B Second positioning part 41,53 First substrate 42,54 Second substrate 52 Blades

Claims

1. A housing part; a vibration unit disposed inside the housing unit; a drive unit that drives the vibration unit; a coupling mechanism that couples a drive rotation shaft of the drive unit and a vibration rotation shaft on which the vibration unit is disposed; a bearing portion disposed inside the housing portion and rotatably supporting the vibration rotation shaft; a compacting portion disposed at a lower end side of the housing portion so that a portion of the compacting portion overlaps with the vibration portion in the extending direction of the vibration rotation shaft; The bearing portion is arranged in plurality on the lower end side of the vibration rotation shaft, the vibration unit is a vibration plate fixed to the vibration rotation shaft, A vibration compaction device, characterized in that the vibration plate is divided and arranged between the bearing portions in the extension direction of the vibration rotation shaft.

2. The compaction section includes: a mounting portion for fixing to the housing portion; a vibration transmission unit that transmits vibration to the ballast, The vibration compaction device described in claim 1, characterized in that the vibration plate is arranged in an area that does not overlap with the vibration transmission part in the extension direction of the vibration rotation axis, or has an overlapping area with the vibration transmission part that is 20% or less of the length of the arrangement area of ​​the vibration plate.

3. The compaction section includes: a mounting portion for fixing to the housing portion; a vibration transmission unit that transmits vibration to the ballast; a blade formed on an outer peripheral surface of the vibration transmitting portion, 2. The vibration compaction device according to claim 1, wherein the vibration plate has an overlap area with the blade in the extension direction of the vibration rotation axis that is 15% or less of the length of the arrangement area of ​​the vibration plate.

4. 4. The vibrating compaction device according to claim 2, wherein the housing and the vibrating rotation shaft are made of aluminum or an aluminum alloy.

5. The bearing portion includes a bearing housing portion and a bearing that rotates inside the bearing housing portion, 5. A vibration compaction device according to claim 1, wherein the bearing housing portion is fixed to the housing portion with its outer peripheral surface in contact with the inner peripheral surface of the housing portion.

6. 6. The vibratory compaction device according to claim 1, wherein the drive unit is an engine or a battery-powered motor.

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