A kind of oversize vehicle chassis dynamometer
The utility model relates to chassis dynamometer technical field more particularly to a kind of oversize vehicle chassis dynamometers.
As automobile gradually becomes household requisites, consumer also gradually proposes the concern of automotive performance, vehicle safety
It rises.Each car manufacturer is also in the continuous detection method and detection system for promoting abundant automobile, in the hope of reaching national legislation
Chassis dynamometer is a kind of room for testing the performances such as vehicle dynamic quality, multi-state discharge index, fuel oil index
Interior bench test equipment.Road simulation dynamometer calculates road analogy equation, and use loading device by roller simulated roadway
It is simulated, realizes the simulation to each operating condition of automobile.
Many car manufacturers replace actual actual road test, bottom in the prior art using vehicle performance testing stand
For driving the motor of roller to be normally at the side on chassis, when needing to detect oversize vehicle, first aspect in disk dynamometer machine
Cause chassis dynamometer pedestal bulky.Second aspect due to roller is driven by the motor of side, it is difficult to be guaranteed
The consistency of the rollers roll on both sides, roller is unstable when detecting vehicle, reduces the accuracy of detection.And existing bottom
When the brake gear of disk dynamometer machine needs brake to deactivate the larger quality in oversize vehicle detection, large volume of roller, Jin Jinyi
The frictional force that symmetrically arranged brake gear provides by two sides can generate the phenomenon that braking not dead or shake, influence to detect.
Therefore, a kind of novel oversize vehicle chassis dynamometer is provided to solve the above-mentioned problems.
Summary of the invention
The purpose of the utility model is to provide a kind of oversize vehicle chassis dynamometers, reduce the pedestal of chassis dynamometer
Volume, the phenomenon that guaranteeing the consistency of roller rotation and can be avoided not dead roller brake or shake.
The technical scheme that the utility model is provided is as follows:
A kind of oversize vehicle chassis dynamometer, comprising: pedestal comprising bottom frame；It is set to four corners of the bottom frame
The apex angle support column at place；For accommodating the piggyback pod of motor, the piggyback pod is set to the middle position of the bottom frame；Wherein,
A motor holding tank is provided on the piggyback pod, the opening direction of the motor holding tank is backwards to the bottom frame, the power
The opposite both ends in cabin are respectively provided with one for placing the bearing holding tank of bearing, the power on the axis direction of the bearing
The both ends of the surface in cabin and the apex angle support column of corresponding side form the chamber for accommodating roller；The top of the bearing holding tank detachably connects
Joint bearing end cap；Dual-axle motor, the dual-axle motor are arranged in the motor holding tank；Upper bracket, the upper bracket setting
In the upper end of the pedestal；Roller, the power output axis connection of the roller and the motor, and it is located at the two of the piggyback pod
The apex angle support column of end face and corresponding side forms the chamber for accommodating roller；Be set to the roller two sides first brake device and
The first end of secondary braking device, the secondary braking device is fixedly connected on the bearing (ball) cover of motor, second end with it is described
The internal circular surfaces of roller have pre-determined distance；In brake, the first brake device positioned at the roller two sides will be rolled from two sides
Cylinder locking, the second end of the secondary braking device are close to the internal circular surfaces of roller；Centering lifting device, the centering, which rises, lifts dress
It installs on the upper bracket.
In above structure, the middle position setting piggyback pod on bottom frame places the motor of driving roller, and roller is set
The two sides of motor are placed in, measuring motor compared with the existing technology reduces the overall volume of pedestal.And roller is directly connected in
On two output shafts of motor, the roller of two sides can guarantee the consistency of rotation, avoid due to velocity of rotation between roller
Wheel caused by deviation jolts or misplaces, to improve the accuracy of detection.By the way that a secondary braking device is arranged more, with
The first brake device that roller two sides are arranged in forms bikini brake, when braking to the roller for oversize vehicle,
It is capable of providing stable brake force, avoids shaking in brake process, can be realized the brake of the roller for oversize vehicle
It vehicle and is not easily susceptible to the effect of external force and rotates, guarantee the safety of test vehicle.
Preferably, the centering lifting device includes: the driving device being set on upper bracket；It is set to the upper bracket
On two pairs of collateral plates being parallel to each other, the roller be located at mutually copes between the collateral plate, the both ends of the collateral plate are equal
Equipped with a guide groove, the guide groove is located at the top of roller；Centering elevation mechanism, the centering elevation mechanism is along described
The both ends of every block of collateral plate are arranged in the extending direction of collateral plate；Retarder, the power input shaft of the retarder and institute
The power output axis connection for stating driving device, the two centering elevation mechanisms ipsilateral positioned at the same collateral plate pass through silk
The power output axis connection of thick stick and the retarder；Arc lift plate, the arc lift plate are respectively arranged at the axis of roller
Top two sides and arc lift plate are equipped with conllinear guiding axis along the two sides on the axis direction of roller, the guiding axis from
It is rotatablely connected by holding across the guide groove and the centering elevation mechanism, the corresponding diameter of a circle of the arc lift plate is greater than
The diameter of the roller；The centering elevation mechanism includes a liter act pedestal, is rotatably provided in pushing away for the liter act pedestal upper end
Arm and sliding sleeve are lifted, the first end of the pushing & lifting arms and the free end of guiding axis are rotatablely connected, the second end of the pushing & lifting arms
It is rotatablely connected with the upper end for rising act pedestal；The liter, which is lifted, is provided with a upper through-hole on pedestal, the liter lifts pedestal and passes through institute
State that through-hole is set on the lead screw and the axis of the upper through-hole is parallel with the axis of the lead screw；In the sliding sleeve
Side is equipped with internal screw thread, and the internal screw thread of the sliding sleeve is engaged with the external screw thread of the lead screw, and the upper through-hole passes through sliding sleeve
Cylinder is slidably connected with lead screw；The lower section of the lead screw is equipped with slide bar, and the axis of the slide bar and the axis of lead screw are parallel；The liter
It lifts pedestal and is equipped with lower through-hole, the lower through-hole is located at the lower section of upper through-hole and the axis of the axis of lower through-hole and upper through-hole is flat
Row, the slide bar pass through on the lower through-hole.
In above structure, by adding slide bar below lead screw, and the lower through-hole on pedestal is lifted by liter and is set in slide bar
On, a part of pressure on pedestal can be lifted by liter be transmitted on slide bar, rather than be all transmitted on lead screw, to reduce
The pressure of the receiving of lead screw avoids lead screw from being pressed down since pressure-bearing is excessive, extends the service life of lead screw.And above structure
Used in lift plate be arc lift plate, compared to the prior art used in straight panel, arc lift plate is in pressure-bearing, the arm of force
It is small compared to the arm of force of straight panel, so the torque that arc lift plate is subject to is smaller, more it is not easy to be pressed down.
Preferably, the guide groove is arc guide groove, and the arc guide groove is corresponding to the geomery of roller.
Preferably, arc limit slot is symmetrically arranged on the opposite face of the collateral plate of the two sides of the corresponding same roller；
The arc lift plate is additionally provided with conllinear limit shaft along the two sides on the axis direction of roller, the axis of the limit shaft with
The axis of guiding axis is parallel, and the free end of the limit shaft is protruded into the arc limit slot and along the arc limit slot
Long axis direction moves reciprocatingly.
In above structure, stretched by the way that arc limit slot is arranged on collateral plate, and by the limit shaft of arc lift plate two sides
Enter in arc limit slot, can be remained arc lift plate with roller by limit shaft in arc lift plate and guiding axis
Separation, when guiding axis being avoided to move up in guide groove, the lower end of arc lift plate can be fitted in the outer surface of cylinder of rolling
On, to cause the abrasion of arc lift plate and roller.
Preferably, the upper end of the arc lift plate is rotatablely connected a support roller, the outer surface of the support roller
With tire interface.
In above structure, by being equipped with a back-up roller that can be rolled in the upper end of arc lift plate and tire interface
Cylinder, can be avoided tire in the detection process, and the upper end of outer surface of tire and arc lift plate rubs, to cause tire and arc
The abrasion of the upper end of shape lift plate.
Preferably, the bearing holding tank at motor holding tank be equipped with semi-circular baffle, the semi-circular baffle with
The piggyback pod is integrally formed.
In above structure, by the way that a semi-circular baffle is arranged, the bearing in bearing holding tank can be avoided in work
It is deviated during work into motor holding tank, influences the stability of bearing rotation.
Preferably, the bottom frame is square framework；The bottom frame is at least arranged one along the axis direction of the bearing
To middle support column.
In above structure, due to place vehicle, especially oversize vehicle on chassis dynamometer, heavier mass be will lead to
Stress is larger in the vertical direction for pedestal, can increase the resistance to compression energy of pedestal entirety by adding middle support column on bottom frame
Power enables pedestal to support the detection of oversize vehicle.
Preferably, the first brake device includes: the first gas-pressure mandril, connecting rod and the first friction plate；Described first
Gas-pressure mandril includes the first cylinder and the first push rod；The first end of first cylinder and the upper bracket are hinged, and described first
The second end of cylinder and the first push rod cooperate, and first push rod is reciprocating along the axis direction of first cylinder；
The first end of first push rod one end and connecting rod far from the first cylinder is hinged；The body of rod and pedestal of the connecting rod are cut with scissors
It connects, the connecting rod is equipped with the first friction plate close to one end of the roller, and when braking, first push rod is from the first cylinder
Interior stretching, first friction plate are attached to the outer round surface of the roller.
In above structure, by the way that first brake device is hinged with upper bracket and measurement of power machine base respectively, facilitate installation, and
When first brake device is damaged, maintenance personal can easily be carried out first brake device from the side of measurement of power machine base
Preferably, the secondary braking device includes the second gas-pressure mandril and arcuate friction piece；Second gas-pressure mandril
Including the second cylinder and the second push rod；The first end of second cylinder is fixedly connected with the bearing (ball) cover, second gas
The second end of cylinder and the second push rod cooperate, and second push rod is reciprocating along the axis direction of second cylinder；Institute
The one end of the second push rod far from the second cylinder is stated to be fixedly connected with the arcuate friction piece；The arcuate friction piece is close to the rolling
The end face of cylinder internal circular surfaces is arcwall face, and the internal circular surfaces of the arcwall face and the roller match.
In above structure, by setting arcuate friction piece, and arcwall face and roller for the friction plate of secondary braking device
Internal circular surfaces it is consistent, brake when, arcuate friction piece can be bonded completely with the internal circular surfaces of roller, be increased to the full extent
Contact area, to increase brake force.
Preferably, the secondary braking device is fixedly connected by cylinder block with the bearing (ball) cover；Second brake
The free end of second push rod of device is fixedly connected by cylinder top with the arcuate friction piece；Wherein, the cylinder block packet
The fixed frame for including the bottom plate affixed with bearing (ball) cover, being set on end face of the bottom plate far from the bearing (ball) cover, it is described solid
Determine frame and is equipped with top through-hole close to one end of the internal circular surfaces of the roller；The first of second cylinder of the secondary braking device
End is fixed on end face of the bottom plate far from the bearing (ball) cover；The cylinder top includes that cylinder push-rod and friction plate are fixed
Plate, the first end of the cylinder push-rod are fixedly connected with one end far from second cylinder of second push rod, the gas
The second end of cylinder push rod is fixedly connected with friction plate fixed plate, and the cylinder push-rod passes through the top through-hole, and described second pushes away
Bar drives cylinder top to move reciprocatingly along the axis direction of second cylinder；The separate cylinder of the friction plate fixed plate
The other end of push rod is equipped with arcuate friction piece.
In above structure, by the way that arcuate friction piece to be connect by cylinder top with the second push rod, wherein in cylinder top
Equipped with the friction plate fixed plate for installing arcuate friction piece, contact area is increased, so that the second push rod rubs with arc
The connection of pad is stronger.And since the second cylinder is fixed in setting cylinder block, the second cylinder can be realized more preferable
Fixation, and when secondary braking device is braked, arcuate friction piece will receive the power in tangential direction, and since cylinder pushes away
Bar is located in the top through-hole of fixed frame, and the side wall for coming directly towards through-hole can provide cylinder push-rod one and the power in the tangential direction
Opposite power, so that secondary braking device will not be caused the fracture of the second push rod or the second cylinder in brake by tangential force
It is fixed loosen, and since arcuate friction piece will not generate relative jitter, thus secondary braking device be capable of providing it is more steady
Fixed brake force.
A kind of oversize vehicle chassis dynamometer provided by the utility model, can bring it is following the utility model has the advantages that
The utility model in motor by will set, when for that can effectively reduce chassis dynamometer when detecting oversize vehicle
The volume of pedestal, and due to roller directly with the power output axis connection of dual-axle motor, thus it is possible to guarantee roller rotation one
Cause property, meanwhile, stop roller or generate to tremble in order to avoid when detecting oversize vehicle, brake gear in the prior art cannot be stopped
Dynamic, a secondary braking device is arranged in the utility model more, forms bikini with the first brake device that roller two sides are arranged in
Brake, when braking to the roller for oversize vehicle, is capable of providing stable brake force, avoids sending out in brake process
Raw shake can be realized the brake of the roller for oversize vehicle and be not easy to receive the effect of external force and rotate, guarantees to survey
The safety of test run.
Detailed description of the invention
Below by clearly understandable mode, preferred embodiment is described with reference to the drawings, to oversize vehicle Chassis dynamometer
Above-mentioned characteristic, technical characteristic, advantage and its implementation of machine are further described.
Fig. 1 is the structural schematic diagram of the pedestal of the utility model；
Fig. 2 is to obtain structural schematic diagram before the utility model does not install lifting device；
Fig. 3 is the side view of Fig. 2；
Fig. 4 is the scheme of installation of the centering lifting device of the utility model.
Drawing reference numeral explanation:
1- pedestal, 1a- apex angle support column, 1b- middle support column, 1c- bottom frame, 1d- piggyback pod, 1f- semi-circular baffle,
1e- bearing (ball) cover, 1f- brake support seat, 2- upper bracket, 3- roller, 4a- first brake device, 4b- secondary braking device, 4c-
Cylinder block, 5- centering lifting device, the collateral plate of 5a-, 5b- retarder, 5c- lead screw, 5d-, which rises, lifts pedestal, 5e- pushing & lifting arms, and 5f- is led
To axis, 5g- arc lift plate, 6- driving device.
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, attached drawing will be compareed below
Illustrate specific embodiment of the present utility model.It should be evident that the accompanying drawings in the following description is only the one of the utility model
A little embodiments for those of ordinary skill in the art without creative efforts, can also be according to these
Attached drawing obtains other attached drawings, and obtains other embodiments.
To make simplified form, part relevant to the utility model is only schematically shown in each figure, they are simultaneously
Its practical structures as product is not represented.
Embodiment 1 discloses a kind of specific embodiment of oversize vehicle chassis dynamometer, comprising: pedestal 1, setting exist
Upper bracket 2, dual-axle motor, roller 3, first brake device 4a, secondary braking device 4b and setting on pedestal 1 is in upper bracket 2
On centering lifting device 5.
Wherein, it as shown in Figure 1, pedestal 1 includes: bottom frame 1c, is set to the apex angle support column 1a of the corner bottom frame 1c, is used for
The piggyback pod 1d of dual-axle motor is accommodated, piggyback pod 1d is fixedly arranged on the middle position of bottom frame 1c, and one is provided on piggyback pod 1d
For accommodating the motor holding tank of dual-axle motor, the opening direction of motor holding tank upward, i.e., backwards to the direction of bottom frame 1c.Power
The opposite both ends of cabin 1d are respectively provided with one for placing the bearing holding tank of bearing, the piggyback pod on the axis direction of bearing
The both ends of the surface of 1d and the apex angle support column 1a of corresponding side form the chamber for accommodating roller 3, are equipped with roller 3, the roller 3 in the chamber
It is connected on the power output shaft of dual-axle motor, and upper bracket 2 is set to the upper end of apex angle support column 1a.In the present embodiment,
The two sides of piggyback pod 1d are respectively provided with a roller 3, and the top of bearing holding tank is equipped with bearing (ball) cover 1e.
When dual-axle motor is installed into motor holding tank, after bearing is also installed into bearing holding tank, installed in the upper end of bearing
The both ends of bearing (ball) cover 1e, bearing (ball) cover 1e are connect by removable connectors such as screws with piggyback pod 1d.
By will be set in dual-axle motor, using this arrangement in the Chassis dynamometer machine base 1 for being used to detect oversize vehicle
Form enables to the structure of pedestal 1 more compact, facilitates the carrying and placement of chassis dynamometer, simultaneously as each roller
3, directly with the output axis connection of motor, can guarantee the consistency rotated between each roller 3, improve the accuracy of detection.
As shown in Figures 2 and 3, first brake device 4a is set to 3 two sides of roller, and secondary braking device 4b is set to bearing
On end cap 1e.First brake device 4a and secondary braking device 4b forms bikini brake.It is capable of providing stable brake force.
First brake device 4a includes the first gas-pressure mandril, connecting rod and the first friction plate.Wherein, the first gas-pressure mandril packet
Include the first cylinder and the first push rod.The first end of first cylinder and the lower end surface of upper bracket 2 are hinged, the second end of the first cylinder with
First push rod is slidably connected, and the first push rod moves reciprocatingly on the axis direction of the first cylinder, and the first push rod is far from the first gas
One end of cylinder and the first end of connecting rod are hinged, and the second end of connecting rod is installed with the first friction plate, and the first friction plate is set to
Connecting rod is on the end face of the outer round surface of roller 3.And the brake on the apex angle support column 1a of the body of rod of connecting rod and pedestal 1
Support base 1f is hinged.In the present embodiment, connecting rod is Z-type connecting rod.
The cross sectional shape of above-mentioned brake support seat 1f is triangle, is capable of providing stable support force.
Secondary braking device 4b includes: the second gas-pressure mandril and arcuate friction piece, wherein the second gas-pressure mandril includes second
Cylinder and the second push rod, the first end of the second cylinder and the upper surface for being fixed on bearing (ball) cover 1e, the second end of the second cylinder with
Second push rod is slidably connected, and the second push rod can move reciprocatingly on the axial direction of the second cylinder.
Wherein, the axis direction of the second push rod is perpendicular to horizontal plane, one end of separate second cylinder of the second push rod and arc
Shape friction plate is fixedly connected.Arcuate friction piece is arcwall face close to the end face of the internal circular surfaces of rotating cylinder, and arcwall face and roller 3
Internal circular surfaces size is consistent, and when braking, arcwall face can be fitted in completely on the internal circular surfaces of roller 3, and arcuate friction piece can
Think ceramic arc friction plate.
The brake process of the present embodiment are as follows:
The first cylinder of first brake device 4a releases the first push rod, and the first push rod is downward by the first end of connecting rod
Pressure, using the body of rod of the first push rod and first friction plate of the brake support frame hinge joint as the point of rotation, in the second end of the first push rod
The outer round surface for being close to roller 3 is ramped up, at the same time, the second cylinder of secondary braking device 4b pushes up the second push rod,
Second push rod drives arcuate friction piece to move upwards, so that the arcwall face of arcuate friction piece is close to the internal circular surfaces of roller 3, knot
Beam brake process.
Bikini brake is formed in brake by using first brake device 4a and secondary braking device 4b, while to rolling
Cylinder 3 provides brake force and is capable of providing stable brake force when braking to the roller 3 for oversize vehicle, stops in time
Stop, and prevent the shake in brake of roller 3, is not easy to receive the effect of external force and rotate, guarantees the safety of test vehicle
And since first brake device 4a is arranged on the brake support seat 1f of measurement of power machine base 1, operator can be convenient from side
Face is close to be installed or is repaired.
As shown in figure 4, embodiment 2 is on the basis of embodiment 1, the centering lifting device 5 of embodiment 2, comprising: setting exists
Driving motor on upper bracket 2, the driving motor are dual-axle motor, and are located at the unilateral middle position of upper bracket 2, upper bracket 2
On be installed with two couples of collateral plate 5a being parallel to each other, two opposite side supporting plate 5a are set to the two sides of dual-axle motor, each pair of collateral plate 5a
Between be equipped with a roller 3, the axis of the roller 3 is perpendicular to collateral plate 5a.Along the both ends on the extending direction of collateral plate 5a
It is respectively provided with a guide groove, which is arc guide groove, and bending direction is towards corresponding roller 3, the arc guide groove
Positioned at the top of roller 3, and the corresponding diameter of a circle of long axis of arc guide groove is greater than the diameter of roller 3, every piece of collateral plate 5a
The both ends of side far from roller 3 are respectively provided with a centering elevation mechanism, in the present embodiment, are equipped with eight centering elevators altogether
Structure.It of courses, guide groove is not limited to arc guide groove, and linear guide groove is also possible, and details are not described herein again.
Centering lifting device 5 further include: arc lift plate 5g is symmetrically arranged with above the axis two sides of roller 3,
The corresponding diameter of a circle of arc lift plate 5g is greater than the diameter of roller 3.On axis direction of the arc lift plate 5g along roller 3
Both ends be equipped with conllinear guiding axis 5f, the axis of guiding axis 5f is parallel to the axis of roller 3.
Centering elevation mechanism includes: that liter act pedestal 5d1, pushing & lifting arms 5e and sliding sleeve, the free end of guiding axis 5f pass through
Arcuate guide axis 5f and the first end of pushing & lifting arms 5e are hinged, and the second end of pushing & lifting arms 5e connects with the upper shaft for lifting pedestal 5d1 is risen.It pushes away
Lifting arm 5e can push guiding axis 5f to move back and forth in arc guide groove.
It rises to lift and is provided with through-hole and lower through-hole on pedestal 5d1, lower through-hole is located at the lower section of upper through-hole, and it is logical to rise act pedestal 5d1
Cross that through-hole is set on lead screw 5c and the axis of upper through-hole is parallel with the axis of lead screw 5c.Every lead screw 5c and a retarder
5b connection, retarder 5b are connect by transmission shaft with driving motor.Driving motor drives retarder 5b to drive lead screw 5c around certainly
The axis of body rotates.The inner wall of sliding sleeve is equipped with internal screw thread, and the external screw thread on the internal screw thread and lead screw 5c is intermeshed, sliding
Moving sleeve is fixedly connected with upper through-hole, when lead screw 5c rotation, by intermeshing internal screw thread and externally threaded relative motion,
Sliding sleeve drives to rise to lift and move reciprocatingly on axis direction of the pedestal 5d1 along lead screw 5c.The both ends of the collateral plate 5a of same
Centering elevation mechanism lead screw 5c rotate when, two rise lift pedestal 5d1 have the opposite direction of motion.
The lower section of lead screw 5c is equipped with a slide bar, and the axis of the slide bar is parallel with the axis of lead screw 5c, and it is logical to rise act pedestal 5d1
It crosses lower through-hole to be set on slide bar, when tire is contacted with arc lift plate 5g, pressure passes to liter by arc lift plate 5g
Pedestal 5d1 is lifted, a part of pressure can be transmitted at slide bar, to reduce the pressure born at lead screw 5c, be avoided due to detection
Oversize vehicle causes lead screw 5c receiving pressure excessive and leads to the phenomenon that breaking, and extends the service life of lead screw 5c, reduces lead screw
5c replacement frequency improves detection efficiency, reduces use cost.
Centering elevation mechanism further include: the first limit block and the second limit block, the first limit block and the second limit block are all provided with
It is placed in same level height and is fixedly connected with the hithermost collateral plate 5a of the centering elevation mechanism, rise and lift pedestal 5d1 and be located at the
Between one limited block and the second limited block, wherein the first limited block is equipped with the first limit hole, and lead screw 5c passes through the first limit hole,
The diameter of first limit hole is greater than the diameter of lead screw 5c, and the first end of slide bar and the first limited block are affixed, and the second limited block is equipped with
Second limit hole, lead screw 5c pass through the second limit hole, and the diameter of the second limit hole is greater than the diameter of lead screw 5c, the second end of slide bar
It is affixed with the second limited block.By the way that the first limit block and the second limit block are arranged, liter act pedestal 5d1 can be limited lead screw 5c's
Motion range on axis, and can be realized being fixedly connected for slide bar and collateral plate 5a.
As shown in figure 4, embodiment 3 is on the basis of embodiment 2, the centering lifting device 5 of embodiment 3 further include: corresponding
It is symmetrically arranged with arc limit slot on the opposite face of the collateral plate 5a in the two sides of the same roller 3, which leads positioned at arc
To slot lower section and with arc guide groove it is concyclic.
Arc lift plate 5g is additionally provided with conllinear limit shaft along the two sides on the axis direction of roller 3, the limit shaft
Axis is parallel with the axis of guiding axis 5f, and limit shaft is located at the lower section of guiding axis 5f, and the free end of limit shaft protrude into it is ipsilateral
In arc limit slot, when guiding axis 5f is moved in arc guide groove, limit shaft correspondence moves in arc limit slot, the two
Motion state having the same.
Limit shaft can cooperate with guiding axis 5f, so that arc lift plate 5g is remained and do not contacted with roller 3, avoid rolling
Cylinder 3 is in rotation, the outer surface of roller 3 and the internal circular surfaces friction of arc lift plate 5g, lifts so that roller 3 and arc be caused to rise
The damage of plate 5g.
As shown in figure 4, embodiment 4, on the basis of embodiment 2~3, the upper end of the arc lift plate 5g of embodiment 4 passes through
Bearing is rotatablely connected a support roller, which can rotate around the axis of its own, avoids detecting when tire
In the process, outer surface of tire directly rubs with the upper end of arc lift plate 5g, to cause that tire and arc lift plate 5g's is upper
The abrasion at end.
As shown in Figure 1, embodiment 5, on the basis of Examples 1 to 4, the bearing holding tank of embodiment 5 is accommodated close to motor
It is equipped with semi-circular baffle 1f at slot, which is semi-circular shape baffle, the interior diameter of a circle of semi-circular shape baffle >=
The diameter of the output shaft of motor guarantees that the output shaft of motor can smoothly be stretched out from semi-circular shape baffle, and protrudes into setting and exist
In bearing in bearing holding tank.It avoids bearing during the work time, generates offset, influence the stabilization of the output shaft rotation of motor
Wherein, semi-circular baffle 1f is solid by modes such as welding after being integrally formed with piggyback pod 1d or making respectively
In other specific embodiments, semi-circular baffle 1f is also possible to the semi-circular baffle 1f of other shapes, such as inner ring
For the semi-circular baffle 1f of the shapes such as rectangular, rectangle；Also semi-circular baffle 1f, bearing (ball) cover can be set on bearing (ball) cover 1e
Semi-circular baffle 1f cooperation on the semi-circular baffle 1f and piggyback pod 1d of 1e limits the axial displacement of bearing together, herein no longer
As depicted in figs. 1 and 2, for embodiment 6 on the basis of Examples 1 to 5, the bottom frame 1c of embodiment 6 is square frame
Body, and bottom frame 1c is uniformly provided with two couples of middle support column 1b on the axis direction of bearing, the height of middle support column 1b with
The height of apex angle support column 1a is identical, and the upper end of middle support column 1b is connect with upper bracket 2.Due to oversize vehicle quality compared with
Greatly, the pressure on vertical direction for causing pedestal 1 to be subject to is larger, by adding middle support column 1b, can increase chassis entirety
Anti-pressure ability in the vertical direction.
In other specific embodiments, middle support column 1b is not limited to 2 pairs, is also possible to 1 pair, 3 pairs or more, according to
Actual conditions determine the quantity of setting middle standing pillar, and details are not described herein again.
As shown in figure 3, embodiment 7, on the basis of Examples 1 to 6, the secondary braking device 4b of embodiment 7 passes through cylinder
Seat 4c is fixedly connected on the upper surface of bearing (ball) cover 1e.
As shown in figure 3, cylinder block 4c includes the bottom plate being set on bearing (ball) cover 1e, bottom plate is set to far from bearing (ball) cover
Fixed frame on the end face of 1e, fixed frame are equipped with top through-hole close to one end of the internal circular surfaces of roller 3.The first of second cylinder
End is fixed on end face of the bottom plate far from bearing (ball) cover 1e.By the way that cylinder block 4c is arranged, the second cylinder can be realized better
It is fixed.
One end far from the second cylinder of second push rod is connect by cylinder top 8 with arcuate friction piece.Cylinder top packet
Include the friction plate fixed plate of cylinder push-rod, the second end that cylinder push-rod is set, one end far from the second cylinder of cylinder push-rod
Equipped with threaded hole, one end far from the second cylinder of the second push rod is equipped with external screw thread, the external screw thread of the second push rod and threaded hole
Screw-internal thread fit the second push rod of realization is fixedly connected with cylinder push-rod.Friction plate fixed plate on the end face of cylinder push-rod far from setting
There is arcuate friction piece.Cylinder push-rod is located in the top through-hole of cylinder block 4c, and can do along the axis direction of the second cylinder
It moves back and forth.
The second push rod and arcuate friction piece are connected by cylinder top, contact area can be increased, so that
The fixation of arcuate friction piece is stronger, and since cylinder push-rod is located in the through-hole of top, in brake, the internal circular surfaces of roller 3
The power of a tangential direction can be generated to arcuate friction piece, top through-hole is resisted with cylinder push-rod, can be anti-to cylinder push-rod one
To power so that cylinder top and the arcuate friction piece being arranged in cylinder top will not generate shake, therefore, the second brake is filled
It sets 4b and is capable of providing more stable brake force.
It should be noted that above-described embodiment can be freely combined as needed.The above is only the utility model
Preferred embodiment, it is noted that for those skilled in the art, do not departing from the utility model principle
Under the premise of, several improvements and modifications can also be made, these improvements and modifications also should be regarded as the protection scope of the utility model.