WO2020107703A1

WO2020107703A1 - Accelerated loading wheel set for road accelerated loading test device

Info

Publication number: WO2020107703A1
Application number: PCT/CN2019/073739
Authority: WO
Inventors: 贾倩; 冯晋祥; 张鹏; 国兴玉; 管志光; 张吉卫; 杨福广; 阮久宏; 吴清珍; 王慧君; 韩鹰
Original assignee: 山东交通学院
Priority date: 2018-11-26
Filing date: 2019-01-29
Publication date: 2020-06-04
Also published as: JP7101903B2; JP2022509889A; CN109383990A

Abstract

Provided is an accelerated loading wheel set for a road accelerated loading test device, comprising: a circular guide (9) arranged on a vertical plane; two sets of chain transmission pairs symmetrically arranged on both sides of the circular guide (9), each set of the chain transmission pairs comprises a driving sprocket (10), a driven sprocket (1) and a chain, two driving sprockets (10) are coaxially arranged, two driven sprockets (1) are coaxially arranged; six rolling wheel sets (11) moving along the circular guide (9), each rolling wheel set (11) comprises a loading shaft (7), two loading wheels (6) and a plurality of rolling wheels (8), the rolling wheels (8) are located between the two loading wheels (6) and coaxially arranged on the loading shaft (7), two loading wheels (6) move circularly along the circular surface of the circular guide (9), the synchronously moving rolling wheels (8) achieve the rolling purpose. The two ends of the loading shaft (7) of each rolling wheel set (11) are connected to the chain of the two sets of chain transmission pairs, and by changing the distance between the adjacent rolling wheel sets (11), uniaxial or biaxial rolling can be achieved, so that the plurality of rolling wheel sets (11) on the circular guide (9) continuously roll on the road surface circularly.

Description

Accelerated loading wheel set for road surface accelerated loading test equipment

Technical field

The invention relates to the technical field of accelerated loading test equipment, in particular to an accelerated loading wheel set used for road surface accelerated loading test equipment.

Background technique

Pavement acceleration loading test equipment is a special equipment for testing and testing pavement materials and structures. The acceleration loading wheel set of the existing road surface acceleration loading test equipment mainly adopts a reciprocating and circulating rolling type. Existing reciprocating acceleration loading wheels only have one reciprocal rolling against the road surface, which has a complicated structure and low efficiency. The existing cyclic type acceleration loading wheel set is mainly a chain plate type suspension structure driven by a linear motor, which has a complicated structure, poor reliability, low transmission efficiency and high noise.

Summary of the invention

The main purpose of the present invention is to solve the shortcomings of the prior art, and to provide an accelerated loading wheel set for road surface accelerated loading test equipment, so as to realize the rolling of the road surface when a plurality of rolling wheel sets do circular movement along the ring guide Pressure.

The technical solutions adopted by the present invention to solve its technical problems are:

An acceleration loading wheel set for road surface acceleration loading test equipment, whose structure includes:

Annular guide rails arranged on a vertical plane, the annular guide rails are mounted on the test equipment frame;

Two sets of chain drive pairs symmetrically arranged on both sides of the ring rail, each set of chain drive pairs includes a driving sprocket, driven sprocket and chain, and two driving sprockets are coaxially arranged and two driven sprockets are coaxially arranged , The axle of the two active sprockets is connected to the external power mechanism;

At least six rolling wheel groups moving along the ring guide rail, each rolling wheel group includes a loading shaft, two loading wheels and a plurality of rolling wheels, the rolling wheel is located between the two loading wheels and is coaxial Set on the loading shaft, the two loading wheels make a circular movement along the annular surface of the annular guide rail, and the synchronously moving rolling wheels achieve the purpose of rolling. The two ends of the loading shaft of each rolling wheel group are connected with two sets of chain drive chains. One case is that at least six rolling wheel groups are arranged at equal intervals along the chain, and at least two adjacent rolling wheel groups are simultaneously Rolling the pavement. At this time, this situation can be seen as a single axis rolling in sequence. Another situation is: two rolling wheel groups are parallel and closely arranged in a group along the chain, at least one pair of rolling wheel groups The road surface is rolled. At this time, the arrangement of rolling wheels can be regarded as biaxial rolling.

Specifically, the chain is a closed ring structure formed by successively connecting a plurality of chain segments. The number of chain segments is equal to the number of rolling wheel groups. The adjacent chain segments are connected by chain shaft links and chain shaft link pins, and the cotter pins are fastened. Connect the chain link and the link pin.

More specifically, a clamping hole is provided on the end surface of the chain shaft joint, the end of the loading shaft of the rolling wheel set is inserted into the clamping hole of the chain shaft joint, and the bolt passes vertically through the surface of the chain shaft joint and connects the loading shaft to the chain shaft joint; The axis of the loading shaft of the roller compaction set is perpendicular to the longitudinal centerline of the chain.

Specifically, the loading wheel includes a support wheel, and first and second rubber hanging wheels symmetrically fixed to both sides of the supporting wheel. The support wheel, the first rubber hanger and the second rubber hanger are all made of steel. The outer surfaces of the first rubber hanger and the second rubber hanger are covered with vulcanized rubber, and the outer surface of the support wheel is outward The outer circumferential surfaces of the first and second rubber wheels, and the outer circumferential surfaces of the vulcanized rubber of the first and second rubber wheels extend beyond the outer surface of the support wheel. During operation, the vulcanized rubber coated on the outer surface of the first rubber chute and the second rubber chute first contacts the rail surface of the ring rail. As the load increases, the first rubber chute and the second rubber chute The vulcanized rubber covered by the outer surface deforms under pressure, and the supporting wheel will contact the rail surface of the ring guide rail.

Further, the two opposite sides of the supporting wheel are respectively provided with annular grooves. The first rubber hanger wheel and the second rubber hanger wheel are cooperatively placed in the annular grooves on both sides of the supporting wheel, and a plurality of bolts pass through the first The rubber hanging wheel, the supporting wheel and the second rubber hanging wheel are threadedly connected with nuts.

Furthermore, the inner surface of the first rubber hanging wheel is provided with a first inner stop for matching the head of the clamping bolt, and the inner surface of the second rubber hanging wheel has a second inner stop for matching the clamping nut. Bolts and nuts serve the purpose of limit loosening.

Preferably, the surface of the supporting wheel with a shaft hole is a hollow support structure with a plurality of circular holes.

Compared with the prior art, the beneficial effects of the acceleration loading wheel set used in the road surface acceleration loading test equipment of the present invention are:

1) The present invention can realize the continuous rolling of multiple rolling wheel groups on the circular track to the road surface, better reproduce the actual running situation of the vehicle, make the structure simple, reliable, and reduce noise, and finally achieve the optimization of the structure 1. The improvement of work efficiency also reduces energy consumption;

2) In the process of using the present invention, it is possible to realize the conversion between the single-axis and double-axis rolling modes by changing the length of the chain segment and the arrangement of the rolling wheel group;

3) The loading wheel used in the present invention has better strength and rigidity, which can reduce wear and improve the service life; moreover, at the beginning of the loading wheel, the outer circumferential surfaces of the first and second rubber-coated wheels are covered The vulcanized rubber first contacts the rail surface of the ring rail. As the load increases, the vulcanized rubber coated on the outer surface of the first and second rubber wheels deforms under pressure, and the support wheel will only contact the rail of the ring rail Surface contact to meet the needs of high-load high-speed operation.

BRIEF DESCRIPTION

The drawings are used to provide a further understanding of the present invention, and constitute a part of the specification, together with the following specific embodiments to explain the present invention, but do not constitute a limitation of the present invention. In the drawings:

FIG. 1 is a schematic structural diagram of an acceleration loading wheel set according to Embodiment 1 of the present invention;

2 is a cross-sectional view of the enlarged structure taken along the line B-B in FIG. 1;

3 is a plan view of the enlarged structure labeled C in FIG. 2;

4 is a schematic structural diagram of an acceleration loading wheel set according to Embodiment 2 of the present invention;

FIG. 5 is an enlarged schematic diagram of the reference symbol A in FIG. 1 or FIG. 2;

6 is a front view of the structure of the loading wheel of the present invention;

7 is an enlarged schematic diagram of the reference symbol M in FIG. 6;

8 is a left side view of the structure of the loading wheel of the present invention; and

FIG. 9 is a schematic structural view of FIG. 8 after the second rubber hanging wheel is removed.

The numbers in the drawings indicate:

1. Driven sprocket, 2, chain segment, 3, chain shaft pin, 4, chain shaft joint, 5, first bolt, 6, loading wheel, 7, loading shaft, 8, rolling wheel, 9, ring Guide rail, 10, driving sprocket, 11, rolling wheel group.

61. Support wheel, 62, first rubber wheel, 63, second rubber wheel, 64, first vulcanized rubber,

65. Second vulcanized rubber, 66, annular groove, 67, second bolt, 68, nut, 69, circular hole,

a', first inner stop, b', second inner stop.

The letters a, b, c, d, e and f in Fig. 1 represent chain segments of the same length;

The letters a, b, c, d, e, f in Fig. 4 represent chain segments of different lengths.

detailed description

In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

The technical solutions in the embodiments of the present invention will be described clearly and completely in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without making creative efforts fall within the protection scope of the present invention.

Example one:

As shown in FIG. 1, the present invention provides 6 sets of acceleration loading wheels for road surface acceleration loading test equipment, whose structure includes:

An annular guide rail 9 arranged in a vertical plane, and the annular guide rail 9 is mounted on the test equipment frame.

Two sets of chain drive pairs symmetrically arranged on both sides of the ring guide rail 9, each set of chain drive pairs includes a driving sprocket 10, a driven sprocket 1 and a chain, and two driving sprockets 10 are coaxially arranged and two driven chains The wheel 1 is arranged coaxially, and the axles of the two driving sprockets 10 are externally connected to the power mechanism.

Six rolling wheel groups 11 moving along the ring guide 9. As shown in FIGS. 2 to 3, each rolling wheel group 11 includes a loading shaft 7, two loading wheels 6 and a rolling wheel 8. The rolling wheel 8 is located between the two loading wheels 6 and is coaxial Set on the loading shaft 7, the two loading wheels 6 circulate along the annular surface of the annular guide rail 9, and the synchronously moving roller 8 achieves the purpose of roller compaction.

The two ends of the loading shaft 7 of each rolling wheel group 11 are connected with two sets of chain drive chains. The six rolling wheel groups 11 are arranged at equal intervals along the chain. The six rolling wheel groups 11 move along the circular track In the process, there are two or three rolling wheel groups 11 rolling the road at the same time, based on the length of the chain segment 2 and the spacing between the adjacent rolling wheel groups 11, this case can be regarded as a single axis Rolling method.

The chain is a closed ring structure formed by connecting six chain segments 2 in sequence. The adjacent chain segments 2 are connected by the link 4 and the link pin 3; the end of the link 4 is provided with a clamping hole, and the end of the loading shaft 7 of the rolling wheel set 11 is inserted into the clamping hole of the link 4 , The first bolt 5 vertically penetrates the surface of the chain shaft section 4 and fixedly connects the loading shaft 7 to the chain shaft section 4; the axis of the loading shaft 7 of the rolling wheel set 11 intersects with the longitudinal centerline of the chain.

As shown in FIGS. 6 to 9, the loading wheel 6 includes a support wheel 61, and a first rubber hanger 62 and a second rubber hanger 63 symmetrically arranged on both sides of the support wheel 61. The support wheel 61, the first rubber hanging wheel 62 and the second rubber hanging wheel 63 are all made of steel. The outer circumferential surface of the first hanging rubber wheel 62 is covered with a first vulcanized rubber 64, the outer circumferential surface of the second hanging rubber wheel 63 is covered with a second vulcanized rubber 65, and the outer circumferential surface of the supporting wheel 61 is beyond the first hanging rubber The outer circumferential surfaces of the wheel 62 and the second rubber hanger wheel 63, the outer circumferential surfaces of the first vulcanized rubber 64 and the second vulcanized rubber 65 are outward beyond the outer circumferential surface of the support wheel 61. The two opposite sides of the support wheel 61 are respectively provided with annular grooves 66. The first rubber hanger 62 and the second rubber hanger 63 are cooperatively placed in the annular grooves 66 on both sides of the support wheel 61, and a plurality of second bolts 67 are arranged in sequence. A nut 68 is threadedly connected after passing through the first rubber hanger 62, the support wheel 61 and the second rubber hanger 63. The inner surface of the first rubber hanger 62 is provided with a first inner stop a'which is engaged with the head of the second bolt 67, and the inner surface of the second rubber hanger 63 is provided with a second inner stop which is matched with the clamping nut 68 b', for the purpose of limiting the looseness of the second bolt 67 and the nut 68. The surface of the support wheel 61 with the shaft hole is a hollow support structure with a plurality of circular holes 69. During operation, the vulcanized rubber coated on the outer surfaces of the first rubber chute 62 and the second rubber chute 63 first contact the rail surface of the ring guide rail 9. As the load increases, the first rubber chute 62 and the second rubber chute 62 Only when the vulcanized rubber covered by the outer surface of the rubber wheel 63 is deformed under pressure, will the support wheel 61 come into contact with the rail surface of the ring rail 9.

In the working process of this embodiment, the loading wheel 6 moves along the ring guide rail 9 and the synchronously moving roller 8 sequentially performs a roller compaction test when it comes into contact with the road surface, so as to realize a plurality of roller roller groups 11 continuous on the ring rail 9 The rolling of the road surface by the cycle can better reproduce the actual running situation of the vehicle.

Example 2:

As shown in FIG. 4, the present invention provides an accelerated loading wheel set for road surface accelerated loading test equipment, and its structure includes:

Six rolling wheel groups 11 moving along the ring guide 9. Each rolling wheel group 11 includes a loading shaft 7, two loading wheels 6, and a rolling wheel 8. The rolling wheel 8 is located between the two loading wheels 6 and is coaxially arranged on the loading shaft 7, two loading The wheel 6 makes a circular movement along the annular surface of the annular guide rail 9, and the synchronously moving roller 8 achieves the purpose of roller compaction.

The two ends of the loading shaft 7 of each rolling wheel group 11 are connected with two sets of chain drive chains. The six rolling wheel groups 11 are divided into three groups, each group includes two parallel and closely arranged two rolling wheel groups 11, In the process of the six rolling wheel groups 11 moving along the circular track, there are one or two rolling wheel groups 11 simultaneously rolling the road surface, based on the length of the chain segment 2, between the same group of rolling wheel groups 11 And the spacing between adjacent groups of rollers 11 in this case, this case can be regarded as a biaxial roller compaction.

As shown in FIG. 5, the chain is a closed ring structure formed by connecting six chain segments 2 in sequence. The adjacent chain segments 2 are connected by the link 4 and the link pin 3; the end of the link 4 is provided with a clamping hole, and the end of the loading shaft 7 of the rolling wheel set 11 is inserted into the clamping hole of the link 4 , The first bolt 5 vertically penetrates the surface of the chain shaft section 4 and fixedly connects the loading shaft 7 to the chain shaft section 4; the axis of the loading shaft 7 of the rolling wheel set 11 intersects with the longitudinal centerline of the chain.

As shown in FIGS. 6 to 9, the loading wheel 6 includes a support wheel 61, and a first rubber hanger 62 and a second rubber hanger 63 symmetrically arranged on both sides of the support wheel 61. The support wheel 61, the first rubber hanging wheel 62 and the second rubber hanging wheel 63 are all made of steel. The outer circumferential surface of the first hanging rubber wheel 62 is covered with a first vulcanized rubber 64, the outer circumferential surface of the second hanging rubber wheel 63 is covered with a second vulcanized rubber 65, and the outer circumferential surface of the support wheel 61 is beyond the first hanging rubber The outer circumferential surfaces of the wheel 62 and the second rubber hanger wheel 63, the outer circumferential surfaces of the first vulcanized rubber 64 and the second vulcanized rubber 65 are outward beyond the outer circumferential surface of the support wheel 61. The two opposite sides of the support wheel 61 are respectively provided with annular grooves 66. The first rubber hanger 62 and the second rubber hanger 63 are cooperatively placed in the annular grooves 66 on both sides of the support wheel 61, and a plurality of second bolts 67 are arranged in sequence. A nut 68 is threadedly connected after passing through the first rubber hanger 62, the support wheel 61 and the second rubber hanger 63. The inner surface of the first rubber hanger 62 is provided with a first inner stop a'which is engaged with the head of the second bolt 67, and the inner surface of the second rubber hanger 63 is provided with a second inner stop which is matched with the clamping nut 68 b', for the purpose of limiting the looseness of the second bolt 67 and the nut 68. The surface of the support wheel 61 with the shaft hole is a hollow support structure with a plurality of circular holes 69. During operation, the vulcanized rubber coated on the outer surfaces of the first rubber chute 62 and the second rubber chute 63 first contact the rail surface of the ring guide rail 9. As the load increases, the first rubber chute 62 and the second rubber chute 62 Only when the vulcanized rubber covered by the outer surface of the rubber wheel 63 is deformed under pressure, will the support wheel 61 come into contact with the rail surface of the ring rail 9.

In the working process of this embodiment, the loading wheel 6 moves along the ring guide rail 9, the rollers 8 of the same group are in contact with the road surface at the same time for rolling test, and the rollers 8 of different groups are sequentially in contact with the road surface for rolling test. It is used to realize the continuous rolling of multiple rolling wheel groups 11 on the annular guide rail 9 on the road surface, so as to better reproduce the actual running situation of the vehicle.

The above is the best embodiment of the present invention, and it should be noted that the best embodiment is only used to understand the present invention, and is not used to limit the protection scope of the present invention. In addition, the features in the preferred embodiments are applicable to both method embodiments and device embodiments at the same time unless otherwise noted. The technical features that appear in the same or different embodiments can conflict without conflicting Use in combination.

It should be noted that the above definition of each element is not limited to the various specific structures or shapes mentioned in the embodiments, and those of ordinary skill in the art can simply and well replace it. The specific examples described above The purpose, technical solution and beneficial effects of the present invention are further described in detail. It should be understood that the above is only a specific embodiment of the present invention and is not intended to limit the present invention. Within the principle, any modifications, equivalent replacements, improvements, etc., should be included in the protection scope of the present invention.

Claims

An acceleration loading wheel set for road surface acceleration loading test equipment, characterized in that the acceleration loading wheel set includes:

An annular guide rail arranged in a vertical plane, the annular guide rail being mounted on the frame of the test equipment;

Two sets of chain drive pairs symmetrically arranged on both sides of the ring rail, each set of chain drive pairs includes a driving sprocket, driven sprocket and chain, and two driving sprockets are coaxially arranged and two driven sprockets are coaxially arranged , The axle of the two active sprockets is connected to the external power mechanism;

At least six rolling wheel groups moving along the ring guide rail, each rolling wheel group including a loading shaft, two loading wheels and a plurality of rolling wheels, the plurality of rolling wheels are located in the two loading Between the wheels and coaxially arranged on the loading shaft, the two loading wheels make a circular movement along the annular surface of the annular guide rail, and the synchronously moving rolling wheel group achieves the purpose of rolling; each rolling Two ends of the loading shaft of the wheel set are connected to the chains of the two sets of chain transmission pairs, the at least six rolling wheel sets are arranged at equal intervals along the chain, and at least two adjacent rolling The wheel sets simultaneously crush the road surface, or two roller sets are parallel and tightly arranged along the chain to form a group, and at least one roller set performs roller compaction on the road surface.
The acceleration loading wheel set for a road surface acceleration loading test device according to claim 1, characterized in that the chain is a closed ring structure formed by connecting a plurality of chain segments in sequence, and the number of chain segments is equal to that of the rolling wheel set In terms of quantity, adjacent chain segments are connected by a chain shaft link and a chain shaft link pin, and a split pin tightly connects the chain shaft link and the chain shaft link pin.
The acceleration loading wheel set for road surface acceleration loading test equipment according to claim 2, characterized in that the end surface of the chain joint is provided with a clamping hole, and the end of the loading shaft of the rolling wheel set is inserted into the In the clamping hole of the chain shaft joint, a bolt vertically passes through the surface of the chain shaft joint and fixedly connects the loading shaft to the chain shaft joint; the axis of the loading shaft of the rolling wheel set Set perpendicularly to the longitudinal centerline of the chain.
The acceleration loading wheel set for a road surface acceleration loading test device according to claim 1, wherein each of the two loading wheels includes a support wheel, and two symmetrically fixed to the support wheel The first rubber hanger and the second rubber hanger on the side, the support wheel, the first rubber hanger and the second rubber hanger are all made of steel, and the first rubber hanger and the rubber The outer circumferential surfaces of the second rubber-coated wheels are respectively covered with vulcanized rubber, and the outer circumferential surfaces of the support wheels extend outwardly beyond the outer circular surfaces of the first rubber-coated wheels and the second rubber-coated wheels, the first The outer circumferential surface of the vulcanized rubber of the rubber hanger wheel and the second rubber hanger wheel is beyond the outer surface of the support wheel.
The acceleration loading wheel set for road surface acceleration loading test equipment according to claim 4, characterized in that two side surfaces of the support wheel are respectively provided with annular grooves, the first rubber hanger and the second The rubber hanging wheels are respectively arranged in the annular grooves on both sides of the supporting wheel, and a plurality of bolts sequentially pass through the rear threads of the first rubber hanging wheel, the supporting wheel, and the second rubber hanging wheel Nuts are connected.
The acceleration loading wheel set for road surface acceleration loading test equipment according to claim 4, wherein the inner surface of the first rubber-hanging wheel is provided with a first inner stop that cooperates with the head of the clamping bolt, so The inner surface of the second rubber hanging wheel is provided with a second inner stop that is matched with a clamping nut.
The acceleration loading wheel set for road surface acceleration loading test equipment according to claim 4, characterized in that the surface of the support wheel with a shaft hole is a hollow support structure with a plurality of circular holes.