Anti-loosening device of surface vibration compactor

Abstract

The utility model relates to the technical field of looseness prevention, and discloses an anti-looseness device of a surface vibration compactor, which is characterized in that a fastening cross beam is additionally arranged to limit overlarge amplitude of a vibration ramming plate, a rubber ring is used for buffering and damping, the influence of vibration on a vertical bracket is reduced, and the influence of vibration on a test cylinder is further reduced. The connecting mode of the vertical rod and the vibrating ramming plate is changed from fixed connection to spherical hinge connection, so that the pulling force on the vertical rod when the vibrating ramming plate continuously vibrates is reduced, and the situation that the vertical rod is broken is avoided; the vibration of the vibrating ramming plate is inhibited from a vibration source, and accurate vibration reduction is realized; original long screws are ingeniously utilized to prevent self-loosening, the overall anti-loosening performance is improved through the fastening pieces and the tightening pieces, and the situation that the long screws loosen and fall off, and consequently the test cylinder moves is effectively avoided. The surface vibration compactor is simple in structure, low in cost and convenient to maintain, the structure can be optimized with low cost on the basis that the original structure of an existing surface vibration compactor is not changed, the anti-loosening performance of the device is improved through technical transformation, and equipment does not need to be replaced with high cost.

Description

Technical Field

[0001] The utility model relates to the technical field of anti-loosening, in particular to an anti-loosening device for a surface vibration compactor. Background Art

[0002] The surface vibratory compactor is a device used for testing civil engineering and building materials. It is mainly used to simulate the compaction process at the construction site and to determine the maximum dry density of non-cohesive, free-draining coarse-grained soil and coarse-grained soil (including rockfill).

[0003] Currently, conventional surface vibratory compactors consist of a control system, a vibrating motor, a vibrating tamper connected to the motor via a vertical rod, a test tube, and a vertical support. To use, the test tube is first mounted on an operating platform; the specimen (such as soil or asphalt mixture) is then loaded into the test tube according to the specified weight and number of layers. The device is then started, and the control system drives the vibrating motor and tamper from top to bottom along the vertical support. The tamper enters a preset position within the test tube. Driven by the vibrating motor, the tamper then performs vertical vibration compaction on the surface of the specimen. After the particles are sheared and crushed, they are rearranged and moved to a stable position corresponding to the standard conditions of geotechnical test specifications, thereby compacting the soil.

[0004] The problems existing in the use of existing surface vibration compactors are as follows: the entire device is affected by continuous vibration during the compaction process, and the vibration source is the vibrating rammer. Because the amplitude of the vibrating rammer is too large, the vertical rod may break; secondly, the test cylinder has a certain height and is only fastened at its chassis by two long screws and their matching nuts. Due to continuous vibration, if the screws become loose, the test cylinder will be displaced. If the displacement is large, the vibrating rammer will not be able to align with the test cylinder as required, causing interference between the vibrating rammer and the test cylinder, and the compaction function cannot be achieved.

[0005] To address the above issues, there are currently surface vibration compactors with strong test tube tightening performance. However, replacing equipment is costly for enterprises, especially small enterprises, and replacing equipment is not the best solution. Utility Model Content

[0006] The utility model aims to provide an anti-loosening device for a surface vibration compactor. Without changing the original structure of the existing surface vibration compactor, the structure is optimized at a lower cost to improve the anti-loosening performance of the device, thereby avoiding the situation in which vibration during the compaction test causes the vertical rod to break and the screws to loosen and fall off, causing the test tube to move.

[0007] The basic solution provided by the utility model is: a surface vibration compactor anti-loosening device, the surface vibration compactor includes a vertical bracket, a vibration motor, a vibration tamping plate connected to the vibration motor through a vertical rod, and a test tube, and two long screws are symmetrically arranged on both sides of the test tube to fix it;

[0008] The device comprises a fastening crossbeam with a plurality of through holes, the fastening crossbeam is sleeved on the vertical rod and the vertical support through the plurality of through holes, the fastening crossbeam is movably sleeved on the vertical support, so that the fastening crossbeam moves up and down with the vibration motor and the vibration tamper plate, and the position of the fastening crossbeam relative to the vibration motor and the vibration tamper plate remains unchanged during the up and down movement; a rubber ring is arranged at the through hole; the vertical rod is spherically connected with the vibration tamper plate;

[0009] The device further comprises two fasteners and two tensioning members connected between the two fasteners; the fastener is a ring-shaped member with an internal thread matched with the thread of the long screw; the tensioning member is a strip-shaped member with micro elasticity, so as to form a micro elastic space for sleeving the test tube between the two tensioning members; one of the fasteners is sleeved at the preset position of one long screw, and when the two tensioning members are sleeved on the test tube in the stretched state, the fastener drives the tensioning member to generate tension, so as to form a tensioning force between the two long screws, for tensioning and limiting the two long screws, and the two tensioning members in the stretched state extrude and limit the sleeved test tube.

[0010] The working principle and advantages of the device are that the fastening crossbeam reduces the vibration influence from the source, and the tensioning member and the fastener take anti-loosening measures for the test tube affected by the vibration, and the anti-loosening ability of the whole device is improved in multiple dimensions.

[0011] Compared with the prior art, the device has the following advantages:

[0012] 1) The device has simple structure, low component cost, convenient maintenance, can realize structure optimization with less cost on the basis of not changing the original structure of the surface vibration compactor, and can improve the anti-loosening performance of the device through technical transformation without large cost equipment replacement;

[0013] 2) The fastening crossbeam is added to limit the excessive amplitude of the vibration tamper plate, the rubber ring is used for buffering and reducing vibration, the influence of vibration on the vertical support is reduced, the influence of vibration on the test tube is further reduced, the connection mode of the vertical rod and the vibration tamper plate is changed from fixed connection to spherical connection, so as to reduce the tension of the vertical rod when the vibration tamper plate continuously vibrates, avoid the breakage of the vertical rod, suppress the vibration of the vibration tamper plate from the vibration source, and realize precise vibration reduction;

[0014] 3) The original long screw is cleverly used to prevent it from loosening, thereby improving the overall anti-loosening performance and effectively preventing the long screw from loosening and falling off, thereby preventing the test tube from moving. The tension generated by the tensioning piece in the stretched state is transmitted to the two long screws through the two fasteners connected to the tensioning piece, thereby forming a tightening force between the two long screws to tighten and limit the two long screws. Under the setting of the tightening force, friction force and thread adaptation, the fastener can be stable on the long screw without slipping. At the same time, since the tensioning piece has micro-elasticity, under the condition of reasonable elasticity setting, the two tensioning pieces in the stretched state can squeeze the sleeved test tube, thereby achieving the squeezing and limiting of the sleeved test tube. The micro-elasticity setting of the tensioning piece is to The method of using a fastener to pull the tensioning member to generate tension is used to achieve the tension limit of the long screw and the extrusion limit of the test tube. In addition, the micro-elastic setting can also adapt to different test tubes with smaller diameter differences. Because the same model of test tube has an allowable diameter error, if a fixed structure anti-loosening device is used, it will not be able to overcome this error, resulting in incompatibility. A one-to-one setting is required, which is costly and inflexible. However, this solution cleverly utilizes the micro-elastic setting of the tensioning member to overcome this problem, improve the versatility of the device, and save device costs. Through reasonable mechanical design and material selection, the appropriate tensioning member elastic coefficient, stretching length, and tensioning force are determined to ensure the stability and reliability of the device. Whether the long screw is in static or dynamic state, the combined action of the fastener and tensioning member can provide strong stability, effectively preventing the screw from loosening during the entire test process. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic structural diagram of the anti-loosening device of the surface vibration compactor provided in the first embodiment of the present utility model;

[0016] Figure 2 A schematic structural diagram of a surface vibration compactor anti-loosening device (including a surface vibration compactor) provided in Example 1 of the present utility model;

[0017] Figure 3 A top view of the clamp structure fastener provided in the second embodiment of the present utility model;

[0018] Figure 4 This is a front view of the right side of the clamp structure fastener provided in the second embodiment of the present utility model. DETAILED DESCRIPTION

[0019] The following is a further detailed description through specific implementation methods:

[0020] The marks in the drawings of the specification include: surface vibration compactor 1, test tube 11, test tube bottom plate 111, long screw 12, nut 121, vertical support 13, vibration motor 14, vertical rod 15, vibration tamper plate 16, first cross beam 17, test tube anti-loosening device 2, fastener 21, hanging ear 211, arc arm 212, straight arm 213, locking assembly 214, groove 215, tensioning piece 22. Embodiment one

[0021] Basically as shown in the drawings Figure 1 And Figure 2 The surface vibration compactor 1 includes a vertical support 13, a vibration motor 14, a vibration tamper plate 16 connected to the vibration motor 14 through a vertical rod 15, and a test tube 11, and two long screws 12 symmetrically arranged on both sides of the test tube 11 for fixing the test tube 11, and the test tube bottom plate 111 is fixed on the bottom plate of the surface vibration compactor 1 through the long screw 12 and its matched nut 121.

[0022] The device includes a fastening cross beam 3 with a plurality of through holes, which is simultaneously sleeved on the vertical rod 15 and the vertical support 13 through the through holes, wherein the fastening cross beam 3 is movably sleeved on the vertical support 13, so that the fastening cross beam 3 moves up and down with the vibration motor 14 and the vibration tamper plate 16, and the position of the fastening cross beam 3 relative to the vibration motor 14 and the vibration tamper plate 16 remains unchanged during the up and down movement. In this embodiment, the fastening cross beam 3 is kept at the middle position between the vibration motor 14 and the vibration tamper plate 16. Although the existing surface vibration compactor can limit the vibration motor 14 and the vibration tamper plate 16 by using the first cross beam 17, the first cross beam 17 is too far away from the vibration tamper plate 16 to effectively limit the amplitude of the vibration tamper plate 16 itself. Therefore, the fastening cross beam 3 is added to cooperate with the first cross beam 17 to limit the vibration motor 14 and the vibration tamper plate 16 at a reasonable position and accurately reduce vibration.

[0023] A rubber ring is installed at the through hole, and the application of the rubber ring is to reduce vibration. However, when selecting the size of the rubber ring, it is necessary to ensure that the fastening cross beam 3 can move smoothly up and down on the vertical support 13, and the position of the fastening cross beam 3 between the vibration motor 14 and the vibration tamper plate 16 remains unchanged during the up and down movement.

[0024] The vertical rod 15 is spherically articulated with the vibration tamper plate 16, and the application of spherical articulation is to limit the tension of the vertical rod caused by the vibration of the vibration tamper plate 16, so as to avoid the breakage of the vertical rod. It is necessary to ensure that the degree of freedom of the spherical articulation of the vertical rod 15 and the vibration tamper plate 16 is within a reasonable range, so as to avoid too flexible rotation causing too large swing of the vibration tamper plate 16 during compaction.

[0025] The device further includes a test tube anti-loosening device 2, which includes two fasteners 21 and two tensioning pieces 22 connected between the two fasteners 21.

[0026] The fastener 21 is an annular member with an internal thread; the internal thread is compatible with the thread of the long screw 12, and the design of the internal thread can increase the strength and reliability of the connection and prevent the fastener 21 from sliding due to vibration or impact; one fastener 21 is correspondingly sleeved at a preset position of a long screw 12; there is a gap between the long screw 12 and the test tube 11, and the ring width of the annular member is greater than 1 / 2 of the gap and less than 3 / 4 of the gap, which is conducive to sleeve installation and makes the fastener 21 structure reasonable and able to withstand the tension of the tensioning member 22; the preset position includes the position on the long screw 12 corresponding to the middle of the test tube 11, and the middle position of the long screw 12 itself, and the middle position is conducive to achieving an effective limiting effect; two hanging ears 211 are symmetrically provided on the outer side of the annular member; the two ends of a tensioning member 22 are respectively connected to the hanging ears 211 on the same side of the two fasteners 21.

[0027] The tensioning members 22 are slightly elastic strips, forming a slightly elastic space between the two tensioning members 22 for fitting the test tube 11. When the fastener 21 is fitted onto the long screw 12, the two tensioning members 22 are fitted onto the test tube 11 in a stretched state. The tensioning members 22 can be slightly elastic ropes or slightly elastic cloth strips of a certain width. The elasticity is set to utilize the tension in the stretched state to be transmitted to the two long screws 12 through the two fasteners 21, forming a tensioning force between the two long screws 12 to achieve the limitation of the long screws 12. At the same time, since the tensioning member 22 has micro-elasticity, when the elasticity is set reasonably, the two tensioning members 22 in the stretched state can exert an extrusion effect on the sleeved test tube 11, thereby achieving the extrusion limitation of the sleeved test tube 11; in addition, there is an allowable diameter error for the same model of test tube 11. If a fixed structure test tube anti-loosening device 2 is used, it may not be usable and requires a one-to-one setting, which is costly and not flexible. The micro-elastic setting of the tensioning member 22 of this scheme can adapt to different test tubes 11 with smaller diameter differences, which can overcome the existing situation, making the device more versatile and low in cost.

[0028] It should be noted that the elastic coefficient needs to be small and not too large. The elasticity should not be increased to improve versatility, resulting in a loss of limiting effect due to excessive elasticity, which would affect the limiting function of a single test tube 11 when in use. Therefore, the micro-elastic space is the space formed by the tensioning member 22 with a small elastic coefficient. Due to the small elastic coefficient, it is called a micro-elastic space. After the test tube 11 is installed, the two tensioning members 22 can achieve squeezing and limiting of the test tube 11. The specific appropriate elastic coefficient can be obtained by a limited number of on-site tests of the size of the test tube 11.

[0029] When in use, the two fasteners 21 are respectively sleeved on the two screw preset positions on both sides of the test tube 11, and the two fasteners 21 are symmetrical with respect to the test tube 11. The two tensioning members 22 are horizontally stretched and sleeved on the test tube 11. The tension generated by the tensioning member 22 in the stretched state is transmitted to the two long screws 12 through the two fasteners 21 connected to the tensioning member 22, forming a tightening force between the two long screws 12 to tighten and limit the two long screws 12. Under the setting of the tightening force, friction force and thread adaptation, the fastener 21 can be stable on the long screw 12 without slipping. At the same time, since the tensioning member 22 has a slight elasticity, when the elasticity is set reasonably, the two tensioning members 22 in the stretched state can squeeze the sleeved test tube 11, thereby achieving the squeezing and limiting of the sleeved test tube 11, and the overall use of the device can achieve a good anti-loosening effect. The tensioning member 22 will be deformed after being stretched. When the test is finished, it can be taken out from the test tube 11, the tension disappears, and the tensioning member 22 returns to its original shape, thereby providing continuous pressure and increasing the service life of the tensioning member 22.

[0030] The surface vibration compactor anti-loosening device provided in this embodiment has a simple structure, low component cost, and convenient maintenance. It can achieve structural optimization at a lower cost without changing the original structure of the existing surface vibration compactor, and promote the improvement of the anti-loosening performance of the device through technical transformation without spending a lot of money on equipment replacement; add a fastening beam to limit the excessive amplitude of the vibration rammer, use rubber rings to buffer and reduce vibration, reduce the impact of vibration on the vertical bracket, further reduce the impact of vibration on the test tube, and change the connection method between the vertical rod and the vibration rammer from a fixed connection to a spherical hinge to reduce the pulling force on the vertical rod when the vibration rammer vibrates continuously, so as to avoid the vertical rod from breaking; suppress the vibration of the vibration rammer from the source of vibration to achieve precise vibration reduction; cleverly use the original long screws to prevent themselves from loosening, improve the overall anti-loosening performance, and effectively avoid the long screws from loosening and falling off, causing the test tube to move.

[0031] Example 2

[0032] Different from the first embodiment, Figure 3 and Figure 4 As shown, the structure of the annular member is a hoop structure, including an arc arm 212 , two straight arms 213 connected to the arc arm 212 , and a locking assembly 214 provided on the straight arm 213 .

[0033] The connection between the two straight arms 213 and the arc arm 212 is provided with a hanging ear 211, and the two ends of a tensioning member 22 are respectively connected to the hanging ears 211 on the same side of the two fasteners 21; the hanging ears 211 are arranged here, which can enable the tensioning member 22 to have a certain extrusion effect on the fastener 21 when it is in a stretched state, thereby achieving a certain extrusion limit on the fastener 21 and improving the stability of the fastener 21.

[0034] The arc arm 212 is circumferentially arranged to form an annular space that can be opened or closed, and the locking assembly 214 is formed using components such as bolts and nuts 121 for conventional clamps; the arc arm 212 is provided with a thread adapted to the long screw 12 on the side facing the annular space; the arc arm 212 is provided with a groove 215 on the outer surface away from the annular space at least on the path in contact with the tensioning member 22, which is used to limit the tensioning member 22 and improve the stability of the tensioning member 22.

[0035] The surface vibration compactor anti-loosening device provided in this embodiment cleverly utilizes the clamp type to improve the stability of the fastener on the long screw, thereby improving the anti-loosening performance of the device itself; at the same time, the clamp type can adjust the size of the annular space to adapt to long screws of different models, thereby improving the versatility of the device, and even if the internal threads do not match, it can be sleeved to the preset position by adjusting the size of the annular space, and it also uses the mismatch of the threads to increase the friction force, thereby improving the fastening performance after sleeve installation, and can further improve the anti-loosening performance of the overall application of the device; the position of the hanging ear is cleverly changed, so that the tensioning piece has a certain extrusion effect on the fastener while stretching and compressing the test tube, thereby realizing the extrusion limitation of the fastener, and at the same time using the groove to limit the tensioning piece, so as to improve the anti-loosening performance of the device in a way that improves the stability of the fastener and the tensioning piece itself.

[0036] Example 3

[0037] What is different from the first embodiment is that an annular groove is formed in the through hole of the fastening cross bar 3 , and the rubber ring is fixed in the annular groove and protrudes from the upper surface of the annular groove.

[0038] After an annular groove is added to the through hole for the fastening cross bar 3 and the vertical bracket 13 to be sleeved, the rubber ring is limited, reducing the displacement of the rubber ring when the fastening cross bar 3 moves up and down on the vertical bracket 13.

[0039] After adding an annular groove to the through hole for fastening the cross bar 3 and the vertical bar 15, it not only limits the rubber ring, but also can play the role of replaceable size to adapt to vertical bars of different diameters. Because some surface vibration compactors have test cylinders of multiple sizes, the vibration rammers and vertical bars configured therein are of different sizes, adding an annular groove to the through hole here improves the versatility of the fastening cross bar 3.

[0040] The above description is merely an embodiment of the present invention. Common knowledge such as the known specific structures and characteristics in the scheme is not described in detail here. A person of ordinary skill in the art is aware of all common technical knowledge in the technical field to which the utility model belongs before the application date or priority date, is able to obtain all existing technologies in the field, and has the ability to apply conventional experimental means before that date. A person of ordinary skill in the art can, under the guidance of this application, improve and implement the present scheme in combination with his or her own abilities. Some typical known structures or methods should not become an obstacle for a person of ordinary skill in the art to implement the present application. It should be pointed out that a person of ordinary skill in the art can make several variations and improvements without departing from the structure of the present invention. These should also be considered as the scope of protection of the present invention. These will not affect the effect of the implementation of the present invention and the practicality of the patent.

Claims

1. A surface vibration compactor anti-loosening device, comprising a vertical support, a vibration motor, a vibration tamping plate connected to the vibration motor via a vertical rod, and a test tube, wherein two long screws are symmetrically arranged on both sides of the test tube to fix it, characterized in that: The device includes a fastening crossbeam having a plurality of through holes, and the fastening crossbeam is simultaneously sleeved on the vertical rod and the vertical bracket using the plurality of through holes, wherein the fastening crossbeam is movably sleeved on the vertical bracket so that the fastening crossbeam moves up and down simultaneously with the vibration motor and the vibration tamping plate, and the position of the fastening crossbeam relative to the vibration motor and the vibration tamping plate remains unchanged during the up and down movement; rubber rings are installed at the through holes; the vertical rod and the vibration tamping plate are spherically hinged; The device also includes two fasteners and two tensioning members connected between the two fasteners; the fasteners are annular members with internal threads that are adapted to the threads of the long screw; the tensioning members are slightly elastic strips that form a slightly elastic space between the two tensioning members for sleeved test tubes; One of the fasteners is correspondingly sleeved at a preset position of a long screw, and when the two tensioning members are sleeved on the test tube in a stretched state, the fastener pulls the tensioning member to generate a pulling force to form a tightening force between the two long screws, which is used to tighten and limit the two long screws, and the two tensioning members in a stretched state squeeze and limit the sleeved test tube.

2. The anti-loosening device of the surface vibration compactor according to claim 1, characterized in that: An annular groove is formed in each through hole of the fastening cross beam, and the rubber ring is fixed in the annular groove and protrudes from the upper surface of the annular groove.

3. The anti-loosening device of the surface vibration compactor according to claim 1, characterized in that: The preset position includes a position on the long screw corresponding to the middle of the test tube and a middle position of the long screw itself.

4. The anti-loosening device of the surface vibration compactor according to claim 1, characterized in that: The tensioning member is a slightly elastic rope.

5. The anti-loosening device of the surface vibration compactor according to claim 1, characterized in that: Two hanging ears are symmetrically arranged on the outer side surface of the annular member, and two ends of a tensioning member are respectively connected to the hanging ears on the same side of the two fasteners.

6. The anti-loosening device of the surface vibration compactor according to claim 1, characterized in that: The structure of the annular member is a hoop structure, comprising an arc arm, two straight arms connected to the arc arm, and a locking assembly arranged on the straight arm.

7. The anti-loosening device of the surface vibration compactor according to claim 6, characterized in that: The connection between the two straight arms and the arc arm is provided with a hanging ear, and the two ends of a tensioning member are respectively connected to the hanging ears on the same side of the two fasteners.

8. The anti-loosening device of the surface vibration compactor according to claim 7, characterized in that: A groove is provided on the outer side surface of the arc arm at least on the path in contact with the tensioning member, for limiting the tensioning member.

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