CN110879166A

CN110879166A - Marshall hits real former

Info

Publication number: CN110879166A
Application number: CN201911303442.2A
Authority: CN
Inventors: 郭寅川; 张剑锋; 申爱琴; 李鹏; 曾子琪
Original assignee: Changan University
Current assignee: Changan University
Priority date: 2019-12-17
Filing date: 2019-12-17
Publication date: 2020-03-13

Abstract

The invention discloses a Marshall compaction forming instrument, wherein a mould is positioned on a base, a test piece is positioned in the mould, a compaction pressure head is arranged at the lower end of a guide rod, the compaction pressure head is positioned right above the test piece, a compaction hammer is arranged on the guide rod, a first chain wheel is sleeved on a first wheel shaft, a second chain wheel is sleeved on a second wheel shaft, the first chain wheel is positioned above the second chain wheel, a third chain wheel is sleeved on the first wheel shaft, a fourth chain wheel is sleeved on an output shaft of a motor, a second chain is sleeved on the first chain wheel and the second chain wheel, the first chain is sleeved on the third chain wheel and the fourth chain wheel, a stop block matched with the compaction hammer is arranged on the second chain, the forming instrument realizes compaction of a plurality of Marshall test pieces at one time, and the experimental efficiency is higher.

Description

Marshall hits real former

Technical Field

The invention belongs to the field of road engineering indoor tests, and relates to a marshall compaction forming instrument.

Background

The Marshall compaction tester is suitable for manufacturing asphalt mixture test pieces by a standard compaction method, is used for testing the physical and mechanical properties of asphalt mixtures in a laboratory, and is also suitable for Marshall tests; in the Marshall experiment process, in order to ensure the accuracy of the experiment, a plurality of groups of test pieces are required to be used for the experiment, and in the Marshall experiment process, the experiment time is longer and the experiment efficiency is lower due to the fact that one test piece is manufactured.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides the Marshall compaction forming instrument which can be used for compacting a plurality of Marshall test pieces at one time and has high experimental efficiency.

In order to achieve the purpose, the Marshall compaction forming instrument comprises a base, a motor, a first wheel axle, a first chain, a second wheel axle and a plurality of compaction components;

each compaction member comprises a die, a test piece, a guide rod, a first chain wheel, a second chain wheel and a second chain;

the mould is located the base, and the test piece is located the mould, and the lower extreme of guide bar is provided with hits real pressure head, hit real pressure head and be located the test piece directly over, be provided with on the guide bar and hit real hammer, first sprocket cup joints in first shaft, and the second sprocket cup joints in the second shaft, and first sprocket is located the top of second sprocket, has cup jointed the third sprocket on the first shaft, has cup jointed the fourth sprocket on the output shaft of motor, and the second chain cup joints on first sprocket and second sprocket, and first chain cup joints on third sprocket and fourth sprocket, is provided with on the second chain and hits real hammer matched with dog.

The device is characterized by further comprising a support, wherein the first wheel shaft and the second wheel shaft are connected to the support, the support is provided with a sleeve, and the upper end of the guide rod penetrates through the sleeve.

The die is fixed on the base through the positioning pin.

The compacting members are distributed in sequence.

The number of the stop blocks is two.

The invention has the following beneficial effects:

when the Marshall compaction forming instrument is operated specifically, the motor drives the third chain wheel to rotate through the fourth chain wheel and the first chain, the third chain wheel drives the first wheel shaft to rotate, the first wheel shaft drives the first chain wheel in each compaction member to rotate, the first chain wheel drives the second chain to move, the second chain drives the stop block to move in the moving process, the stop block drives the compaction hammer, the guide rod and the compaction press head to move upwards until the stop block deviates from the compaction hammer, at the moment, the compaction hammer, the guide rod and the compaction press head move downwards under the action of gravity, and the Marshall test piece is compacted through the compaction press head, so that a plurality of Marshall test pieces are compacted at one time, the experimental efficiency is high, and the Marshall test instrument is popularized in a highway test.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a position diagram of the motor 14 of the present invention;

fig. 3 is a perspective view of the present invention.

Wherein, 1 is the first sprocket, 2 is the base, 3 is the third sprocket, 4 is the first shaft, 5 is the guide bar, 6 is the second sprocket, 7 is the second chain, 8 is the mould, 9 is the compaction hammer, 10 is the locating pin, 11 is the compaction pressure head, 12 is the first chain, 13 is the fourth sprocket, 14 is the motor.

Detailed Description

The invention is described in further detail below with reference to the accompanying drawings:

referring to fig. 1 and 2, the marshall compaction forming apparatus of the present invention comprises a base 2, a motor 14, a first wheel axle 4, a first chain 12, a second wheel axle and a plurality of compaction members; each compaction member comprises a die 8, a test piece, a guide rod 5, a first chain wheel 1, a second chain wheel 6 and a second chain 7; the mould 8 is located base 2, and the test piece is located mould 8, and the lower extreme of guide bar 5 is provided with and hits real pressure head 11, hit real pressure head 11 and be located the test piece directly over, be provided with on the guide bar 5 and hit real hammer 9, first sprocket 1 cup joints on first shaft 4, and second sprocket 6 cup joints on the second shaft, and first sprocket 1 is located the top of second sprocket 6, has cup jointed third sprocket 3 on first shaft 4, has cup jointed fourth sprocket 13 on the output shaft of motor 14, and second chain 7 cup joints on first sprocket 1 and second sprocket 6, and first chain 12 cup joints on third sprocket 3 and fourth sprocket 13, is provided with on the second chain 7 and hits real hammer 9 matched with dog.

The invention also comprises a bracket, wherein the first wheel shaft 4 and the second wheel shaft are connected to the bracket, the bracket is provided with a sleeve, and the upper end of the guide rod 5 penetrates through the sleeve; the die 8 is fixed on the base 2 through a positioning pin 10; all compaction components are distributed in sequence; the number of the stop blocks is two.

The specific working process of the invention is as follows:

the motor 14 drives the third chain wheel 3 to rotate through the fourth chain wheel 13 and the first chain 12, the third chain wheel 3 drives the first wheel shaft 4 to rotate, the first wheel shaft 4 drives the first chain wheel 1 in each compaction member to rotate, the first chain wheel 1 drives the second chain 7 and the second chain wheel 6 to move, the second chain 7 drives the stop dog to move in the moving process, when the stop dog moves to the position of the compaction hammer 9, the guide rod 5 and the compaction press head 11 are driven to move upwards until the stop dog deviates from the compaction hammer 9, at the moment, under the action of gravity, the compaction hammer 9, the guide rod 5 and the compaction press head 11 move downwards, the Marshall test piece is compacted through the compaction press head 11, so that the compaction of a plurality of Marshall test pieces can be carried out at one time, the experimental efficiency is high, and the value is popularized in a road test.

Claims

1. A Marshall compaction forming instrument is characterized by comprising a base (2), a motor (14), a first wheel shaft (4), a first chain (12), a second wheel shaft and a plurality of compaction components;

each compaction member comprises a die (8), a test piece, a guide rod (5), a first chain wheel (1), a second chain wheel (6) and a second chain (7);

the mold (8) is located on the base (2), the test piece is located in the mold (8), the lower end of the guide rod (5) is provided with a compaction pressing head (11), the compaction pressing head (11) is located right above the test piece, a compaction hammer (9) is arranged on the guide rod (5), the first chain wheel (1) is sleeved on the first wheel shaft (4), the second chain wheel (6) is sleeved on the second wheel shaft, the first chain wheel (1) is located above the second chain wheel (6), the third chain wheel (3) is sleeved on the first wheel shaft (4), the fourth chain wheel (13) is sleeved on an output shaft of the motor (14), the second chain (7) is sleeved on the first chain wheel (1) and the second chain wheel (6), the first chain (12) is sleeved on the third chain wheel (3) and the fourth chain wheel (13), and a stop block matched with the compaction hammer (9) is arranged on the second chain (7).

2. Marshall compaction tester according to claim 1, further comprising a support, wherein the first axle (4) and the second axle are connected to the support, and the support is provided with a sleeve through which the upper end of the guide rod (5) passes.

3. A marshall compaction tester as claimed in claim 1, wherein the die (8) is fixed to the base (2) by means of locating pins (10).

4. The marshall compaction tester of claim 1, wherein the compaction members are distributed sequentially.

5. The marshall compaction tester of claim 1 wherein the number of stops is two.