CN112227151B - Concrete hand-held type smoothing machine - Google Patents
Concrete hand-held type smoothing machine Download PDFInfo
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- CN112227151B CN112227151B CN202011039383.5A CN202011039383A CN112227151B CN 112227151 B CN112227151 B CN 112227151B CN 202011039383 A CN202011039383 A CN 202011039383A CN 112227151 B CN112227151 B CN 112227151B
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- cavity
- speed reducer
- outer frame
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
- E01C19/22—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for consolidating or finishing laid-down unset materials
- E01C19/30—Tamping or vibrating apparatus other than rollers ; Devices for ramming individual paving elements
- E01C19/34—Power-driven rammers or tampers, e.g. air-hammer impacted shoes for ramming stone-sett paving; Hand-actuated ramming or tamping machines, e.g. tampers with manually hoisted dropping weight
- E01C19/40—Power-driven rammers or tampers, e.g. air-hammer impacted shoes for ramming stone-sett paving; Hand-actuated ramming or tamping machines, e.g. tampers with manually hoisted dropping weight adapted to impart a smooth finish to the paving, e.g. tamping or vibrating finishers
- E01C19/402—Power-driven rammers or tampers, e.g. air-hammer impacted shoes for ramming stone-sett paving; Hand-actuated ramming or tamping machines, e.g. tampers with manually hoisted dropping weight adapted to impart a smooth finish to the paving, e.g. tamping or vibrating finishers the tools being hand-guided
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
Abstract
The invention relates to the technical field of concrete construction equipment and discloses a concrete hand-held troweling machine which comprises an engine, wherein a speed reducer is arranged below the engine, the engine is movably connected with the speed reducer, four trowels are arranged below the speed reducer, the trowels are movably connected with the speed reducer through a rotating shaft on the speed reducer, and a troweling disc is arranged below the trowels. According to the invention, the total amount of the conductive liquid in the first cavity is continuously reduced to reduce the concentration of free ions between the two conductive plates, so that the conductivity is continuously reduced, in a direct current circuit, when the voltage is not changed, the current is in direct proportion to the conductivity, the current is continuously reduced at the moment, the power of the trowel is reduced due to the reduction of the current, the trowel rotates more and more slowly, the rotating speed of the connecting rod and the handle is gradually reduced, the damage of machine crash caused by too fast rotation of the trowel can be effectively reduced, and the damage degree of the trowel is reduced.
Description
Technical Field
The invention relates to the technical field of concrete construction equipment, in particular to a concrete handheld troweling machine.
Background
Concrete troweling machine is a equipment for floating cement plane, and after the concrete was pour to the road surface, the cement on road surface was in moist not dry state, and most workman can use concrete troweling machine to float the road surface this moment for the road surface is level and smooth more, has greatly improved the closely knit degree and the wearability on road surface, has increased the engineering quality on road surface simultaneously.
The hand-held troweling machine in the market at present trowels the road surface by the power machine driving the troweling disc to rotate, the handrail is held manually, then the machine is pushed to trowel the road surface, the degree of wetness of the concrete of part of the road surface is low, when the troweling disc contacts the section of road surface, the friction force is large, the vibration of the power machine is large, or when the worker does not hold the stable handrail, the handrail is separated from the hand of the worker, because the power machine is not closed, the troweling disc can be continuously driven to rotate, and the weight of the handrail at the upper end is light, the handrail can be finally driven to rotate, the accident that the handrail hurts the worker can happen in the process, has certain potential safety hazard, in addition, because the rotation is too fast, the worker can not close before well, the troweling disc can be automatically stopped after the gasoline is exhausted, the energy is wasted, in addition, because of no human control, the moving direction of the troweling machine can not be controlled, and the troweling machine can collide other objects, the troweling machine is damaged by collision.
Disclosure of Invention
Aiming at the defects of the existing concrete troweling machine in the use process in the background art, the invention provides the concrete hand-held troweling machine which has the advantages of automatic shutdown after out of control of hands, reduction of the damage degree of the troweling machine and reduction of energy consumption, and solves the problems in the background art.
The invention provides the following technical scheme: a hand-held concrete troweling machine comprises an engine, wherein a speed reducer is arranged below the engine, the engine is movably connected with the speed reducer, four trowels are arranged below the speed reducer, the trowels are movably connected with the speed reducer through a rotating shaft on the speed reducer, a trowel disc is arranged below the trowels, the speed reducer and the trowel disc are buckled through the trowels, a rack is fixedly sleeved on the upper surface of the trowel disc, the rack is fixedly provided with the upper surface of the speed reducer, a connecting rod is fixedly arranged on one side of the rack, a centrifugal switch is fixedly arranged on the upper surface of the other end of the connecting rod, handles are fixedly arranged on two side surfaces of the other end of the connecting rod, and an accelerator switch and a flameout switch are fixedly arranged on the handles;
the centrifugal switch comprises an outer frame body, the outer side of the outer frame body is fixedly installed with a connecting rod, the inner part of the outer frame body is hollow, an annular liquid passing plate is fixedly installed in the middle of an inner cavity of the outer frame body, an opening is formed in the position of the circle center of the annular liquid passing plate, the inner ring side wall of the annular liquid passing plate is in a semi-arc shape, the annular liquid passing plate divides the inner cavity of the outer frame body into a first cavity and a second cavity, conductive liquid is filled in the first cavity, the first cavity is a cavity close to a rack, conductive plates are fixedly installed on the upper side wall and the lower side wall of the first cavity, an air bag is fixedly installed on one side, away from the annular liquid passing plate, of the first cavity, touch line points are fixedly installed on the upper side edge and the lower side edge of the outer frame body, one ends of the touch line points are exposed out of the outer frame body, the other ends of the touch line points are fixedly connected with the conductive plates, and the second cavity is a cavity close to a handle, the annular is crossed one side that the liquid board kept away from first cavity and is closely laminated and is had the jam plate, the middle part fixed mounting of jam plate has the push rod, the push rod runs through the outside that the lateral wall of outer frame body extended to outer frame body, the surface of push rod has cup jointed the spring, the one end of spring is connected with the lateral wall of second cavity, and the other end of spring and one side fixed connection of jam plate, the other end fixed mounting of push rod has the lifting piece.
Preferably, the outer frame body and the annular liquid passing plate are made of insulating materials.
Preferably, the centrifugal switch is connected in series with the flameout switch, and the centrifugal switch is electrically connected with the engine.
Preferably, the inside of the airbag is filled with organic oil.
The invention has the following beneficial effects:
1. according to the invention, the troweling machine is turned off by arranging the centrifugal switch, the upper connecting rod rapidly rotates after the troweling machine is out of control due to huge friction force and gravity of the troweling disc at the bottom and the ground, the conductive liquid in the first cavity and the organic oil in the air bag generate centrifugal force during rotation, so that the conductive liquid pushes away the blocking plate, the blocking plate is opened, the conductive liquid in the first cavity flows into the second cavity, the air bag is extruded by the organic oil in the air bag to deform, then the conductive liquid is extruded, the flow of the conductive liquid is accelerated, when the conductive liquid in the first cavity is greatly reduced, the conductive plates cannot be connected, the motor is powered off, the power-off of the troweling machine is controlled, the occurrence of accidents that people are injured by handrails is greatly reduced, meanwhile, the equipment is turned off in advance, the consumption of gasoline is reduced, and the energy is saved.
2. According to the invention, the total amount of the conductive liquid in the first cavity is continuously reduced to reduce the concentration of free ions between the two conductive plates, so that the conductivity is continuously reduced, in a direct current circuit, when the voltage is not changed, the current is in direct proportion to the conductivity, the current is continuously reduced at the moment, the power of the trowel is reduced due to the reduction of the current, the trowel rotates more and more slowly, the rotating speed of the connecting rod and the handle is gradually reduced, the damage of machine crash caused by too fast rotation of the trowel can be effectively reduced, and the damage degree of the trowel is reduced.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic cross-sectional view of the centrifugal switch according to the present invention;
fig. 3 is a schematic structural diagram of a centrifugal switch section when the centrifugal switch is out of control.
In the figure: 1. an engine; 2. a speed reducer; 3. a spatula; 4. smearing a plate; 5. a frame; 6. a connecting rod; 7. a centrifugal switch; 701. an outer frame body; 702. an annular liquid passing plate; 703. a first cavity; 704. a second cavity; 705. a conductive plate; 706. an air bag; 707. a contact point; 708. a blocking plate; 709. a push rod; 7010. a spring; 7011. lifting the block; 8. a handle.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-3, a concrete hand-held troweling machine comprises an engine 1, a speed reducer 2 is arranged below the engine 1, the engine 1 is movably connected with the speed reducer 2, four trowels 3 are arranged below the speed reducer 2, the trowels 3 are movably connected with the speed reducer 2 through a rotating shaft on the speed reducer 2, a troweling tray 4 is arranged below the trowels 3, the speed reducer 2 is buckled with the trowels 4 through the trowels 3, a rack 5 is fixedly sleeved on the upper surface of the troweling tray 4, the rack 5 is fixedly installed on the upper surface of the speed reducer 2, a connecting rod 6 is fixedly installed on one side of the rack 5, a centrifugal switch 7 is fixedly installed on the upper surface of the other end of the connecting rod 6, handles 8 are fixedly installed on two side surfaces of the other end of the connecting rod 6, and an accelerator switch and a flameout switch are fixedly installed on the handles 8.
Wherein, the centrifugal switch 7 comprises an outer frame 701, the outer side of the outer frame 701 is fixedly installed with the connecting rod 6, the inner part of the outer frame 701 is hollow, the middle part of the inner cavity of the outer frame 701 is fixedly provided with an annular liquid passing plate 702, the circle center position of the annular liquid passing plate 702 is provided with an opening, the inner ring side wall of the annular liquid passing plate 702 is in a semi-arc shape, the inner cavity of the outer frame 701 is divided into a first cavity 703 and a second cavity 704 by the annular liquid passing plate 702, the first cavity 703 is a cavity close to the rack 5, the upper and lower side walls of the first cavity 703 are fixedly provided with conductive plates 705, one side of the first cavity 703 far away from the annular liquid passing plate 702 is fixedly provided with an air bag 706, the upper and lower side edges of the outer frame 701 are fixedly provided with conductive plates 707, one end of the conductive plates 707 is exposed out of the outer frame 701, the other end of the conductive plates 707 is fixedly connected with the 705, the second cavity 704 is a cavity close to the handle 8, one side 708 of the annular liquid passing plate 702 far away from the first cavity 703 is tightly attached with a plugging plate, the middle part fixed mounting of jam plate 708 has push rod 709, push rod 709 runs through the outside that outer frame 701's lateral wall extended to outer frame 701, spring 7010 has been cup jointed to the surface of push rod 709, the one end of spring 7010 is connected with the lateral wall of second cavity 704, and one side fixed connection of the other end of spring 7010 and jam plate 708, spring 7010 is in compression state always, and the coating of spring 7010 surface has the anti-corrosion coating, avoid conducting solution and metal to take place chemical reaction, make spring 7010 lose elasticity, the other end fixed mounting of push rod 709 has lifting block 7011, lifting block 7011's diameter is greater than push rod 709's diameter, be convenient for manually promote jam plate 708.
The outer frame 701 and the annular liquid passing plate 702 are made of insulating materials.
Wherein, centrifugal switch 7 is connected in series with the flameout switch, and centrifugal switch 7 is electrically connected with engine 1.
The conductive liquid is filled in the first cavity 703, and in a normal state, the blocking plate 708 is under the action of the self gravity of the first-level blocking plate 708 with the elasticity of the spring, so that the blocking plate 708 is tightly attached to the annular liquid passing plate 702, the first cavity 703 becomes a sealed space, the conductive liquid is filled in the first cavity 703, and free ions in the conductive liquid directionally move to form current and conduct a circuit.
Wherein the air bag 706 is filled with organic oil, and the density of the conductive liquid is 1.19g/cm3To 1.29g/cm3While the density of the organic oil is generally 0.9g/cm3Left and right, after the troweling machine takes off hands, the centrifugal switch 7 drives the centrifugal switch 7 to rotate because the friction force between the troweling disc 4 and the ground is large and the chassis is heavy, and the conductive liquid and the air bag in the first cavity 703 are under the action of the centrifugal force706 to the end of the pulling block 7011, the conductive liquid under the action of centrifugal force pushes the blocking plate 708 to the direction close to the second cavity 704, so that the blocking plate 708 is pushed away, then the conductive liquid enters the second cavity 704 through the opening of the annular liquid passing plate 702, because the density of the organic oil is lower than that of the conductive liquid, the organic oil under the action of the same centrifugal force is lower than that of the conductive liquid, so that the organic oil can deform the air bag 706 to the end close to the pulling block 7011, and then the conductive liquid is squeezed to a certain extent, so as to promote the conductive liquid to move to the inside of the second cavity 704, when most of the conductive liquid flows from the first cavity 703 to the inside of the second cavity 704, the current between the upper and lower conductive plates 705 in the first cavity 703 cannot be conducted, the motor stops supplying power, the troweling machine does not work any more, and the handrail rotation injury event can be effectively reduced, meanwhile, the loss of gasoline is reduced, the energy is saved, meanwhile, the blocking plate 708 is pushed away by the pressure of liquid, the damage to parts during solid impact is reduced, and the service life of the whole device is prolonged.
The using method of the invention is as follows:
after the troweling machine is released, the centrifugal switch 7 causes the connecting rod 6 to start rotating due to the large friction force between the troweling disc 4 and the ground and the heavy chassis, so as to drive the centrifugal switch 7 to rotate, the conductive liquid in the first cavity 703 and the organic oil in the air bag 706 move to the end of the lifting block 7011 under the action of the centrifugal force, the conductive liquid pushes the blocking plate 708 away towards the direction close to the second cavity 704 under the action of the centrifugal force, so that the blocking plate 708 is pushed away, then the conductive liquid enters the second cavity 704 through the opening in the annular liquid passing plate 702, because the density of the organic oil is smaller than that of the conductive liquid, the organic oil is smaller than that of the conductive liquid under the action of inertia under the same action of the centrifugal force, so that the air bag 706 of the organic oil deforms towards the end close to the lifting block 7011, and then extrudes the conductive liquid to a certain degree, so as to promote the conductive liquid to move towards the interior of the second cavity 704, when most of the conductive liquid flows into the second cavity 704 from the first cavity 703, the current between the upper conductive plate 705 and the lower conductive plate 705 in the first cavity 703 cannot be conducted, the motor stops supplying power, the troweling machine does not work any more, and when the troweling machine needs to work again, the pulling block 7011 is pulled in the direction away from the second cavity 704 to overcome the elastic force of the spring 7010, so that the conductive liquid in the second cavity 704 returns to the inside of the first cavity 703 again, and the circuit is conducted.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (4)
1. A concrete hand-held troweling machine, includes engine (1), its characterized in that: the engine is characterized in that a speed reducer (2) is arranged below the engine (1), the engine (1) is movably connected with the speed reducer (2), four trowels (3) are arranged below the speed reducer (2), the trowels (3) are movably connected with the speed reducer (2) through rotating shafts on the speed reducer (2), a plastering plate (4) is arranged below the trowels (3), the speed reducer (2) is buckled with the plastering plate (4) through the trowels (3), a rack (5) is fixedly sleeved on the upper surface of the plastering plate (4), the upper surface of the speed reducer (2) is fixedly installed on the rack (5), a connecting rod (6) is fixedly installed on one side of the rack (5), a centrifugal switch (7) is fixedly installed on the upper surface of the other end of the connecting rod (6), and a handle (8) is fixedly installed on the other end of the two side faces of the connecting rod (6), an accelerator switch and a flameout switch are fixedly arranged on the grip (8);
the centrifugal switch (7) comprises an outer frame body (701), the outer side of the outer frame body (701) is fixedly installed with a connecting rod (6), the inner part of the outer frame body (701) is hollow, an annular liquid passing plate (702) is fixedly installed in the middle of an inner cavity of the outer frame body (701), an opening is formed in the circle center position of the annular liquid passing plate (702), the inner ring side wall of the annular liquid passing plate (702) is in a semi-arc shape, the inner cavity of the outer frame body (701) is divided into a first cavity (703) and a second cavity (704) by the annular liquid passing plate (702), conductive liquid is filled in the first cavity (703), the first cavity (703) is a cavity close to the rack (5), conductive plates (705) are fixedly installed on the upper side wall and the lower side wall of the first cavity (703), and an air bag (706) is fixedly installed on one side, far away from the annular liquid passing plate (702), of the first cavity (703), the upper side and the lower side of the outer frame body (701) are fixedly provided with a contact line point (707), one end of the contact line point (707) is exposed out of the outer frame body (701), the other end of the contact line point (707) is fixedly connected with the conductive plate (705), the second cavity (704) is a cavity close to the grip (8), one side of the annular liquid passing plate (702) far away from the first cavity (703) is tightly attached with a blocking plate (708), the middle part of the blocking plate (708) is fixedly provided with a push rod (709), the push rod (709) penetrates through the side wall of the outer frame body (701) and extends to the outside of the outer frame body (701), a spring (7010) is sleeved on the outer surface of the push rod (709), one end of the spring (7010) is connected with the side wall of the second cavity (704), and the other end of the spring (7010) is fixedly connected with one side of the blocking plate (708), and the other end of the push rod (709) is fixedly provided with a lifting block (7011).
2. The concrete hand-held troweling machine according to claim 1, characterized in that: the outer frame body (701) and the annular liquid passing plate (702) are made of insulating materials.
3. The concrete hand-held troweling machine according to claim 1, characterized in that: the centrifugal switch (7) is connected with the flameout switch in series, and the centrifugal switch (7) is electrically connected with the engine (1).
4. The concrete hand-held troweling machine according to claim 1, characterized in that: the interior of the air bag (706) is filled with organic oil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011039383.5A CN112227151B (en) | 2020-09-28 | 2020-09-28 | Concrete hand-held type smoothing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011039383.5A CN112227151B (en) | 2020-09-28 | 2020-09-28 | Concrete hand-held type smoothing machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112227151A CN112227151A (en) | 2021-01-15 |
| CN112227151B true CN112227151B (en) | 2021-12-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011039383.5A Active CN112227151B (en) | 2020-09-28 | 2020-09-28 | Concrete hand-held type smoothing machine |
Country Status (1)
| Country | Link |
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| CN (1) | CN112227151B (en) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3331290A (en) * | 1965-12-10 | 1967-07-18 | Equipment Dev Co Inc | Powered trowel |
| CN204835992U (en) * | 2015-08-24 | 2015-12-02 | 尚勤贵 | Centrifugal switch and brushless liquid that has this centrifugal switch hinder motor starter |
| CN108183047B (en) * | 2018-01-10 | 2019-05-17 | 东方电气集团东方汽轮机有限公司 | A kind of multiple channel mechanical formula acceleration switch |
| CN109025220B (en) * | 2018-08-03 | 2020-07-17 | 崇义县鑫晨商砼有限公司 | Concrete troweling machine with out-of-control centrifugal closing function |
| CN110137029A (en) * | 2019-05-30 | 2019-08-16 | 河南全新机电设备有限公司 | A kind of permanent magnetism centrifugal switch of Clinker less |
| CN210200627U (en) * | 2019-05-30 | 2020-03-27 | 河南全新机电设备有限公司 | Permanent magnet centrifugal switch of brushless acyclic starter |
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2020
- 2020-09-28 CN CN202011039383.5A patent/CN112227151B/en active Active
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