Summary of the invention
This application provides a kind of wheel system and Portable digital X-ray apparatus, to simplify the attended operation of mobile device.
The first aspect of the application provides a kind of wheel system comprising at least two wheel assemblies and brake assemblies, institute
Stating wheel assembly includes wheel and wheel shaft, and the brake assemblies include driving portion and friction portion,
One end of the wheel shaft is fixedly connected with the wheel, and the other end is flexibly connected with the friction portion, the driving
Portion and the friction portion are sequentially connected, and the driving portion can brake the friction portion, so that the friction portion and the wheel shaft
It is pressed against each other.
Preferably, the friction portion includes the first friction block and the second friction block, the wheel shaft of two wheel assemblies
It is rotatablely connected respectively with first friction block and second friction block, in first friction block and second friction block
At least one on there is arc-shaped inner wall, the arc-shaped inner wall is used to fit with the outer peripheral surface of the wheel shaft.
Preferably, first friction block and second friction block form integral structure.
Preferably, first friction block and second friction block form split type structure, and the driving portion includes the
One driving portion and the second driving portion, first driving portion and first friction block are sequentially connected, second driving portion with
The second friction block transmission connection.
Preferably, at least one of first friction block and second friction block are thread friction block, the drive
Dynamic portion includes screw rod, and the thread friction block includes wheel shaft mating part, the first thread plate and the second thread plate, first spiral shell
Card and second thread plate are connected to the opposite sides of the wheel shaft mating part, and opened up in the two for
The driving screw thread of the screw flight cooperation, the thread rotary orientation and second thread plate of the driving screw thread of first thread plate
Driving screw thread thread rotary orientation it is opposite.
Preferably, the driving portion further includes driving pedal, and the driving pedal is fixedly connected with the screw rod, the drive
Dynamic pedal forms the driving trip rotated around the axis of the screw rod after bearing driving force.
Preferably, at least one of first thread plate and second thread plate include plate body and link block, institute
It states and opens up mounting hole on plate body, the link block is fixed in the mounting hole, and the driving screw thread is opened in the link block
On.
Preferably, there is preset interval between the wheel shaft of two wheel assemblies.
Preferably, the wheel shaft includes the first shaft part, the first universal joint, the second shaft part, the 20000th being successively sequentially connected
To section and third shaft part, first shaft part is fixedly connected with the wheel, and the third shaft part is rotationally connected with the friction
In portion, second shaft part is obliquely installed relative to the axis of first shaft part.
Preferably, the axis collinear of the third shaft part of two wheel assemblies.
The second aspect of the application provides a kind of Portable digital X-ray apparatus comprising car body and any of the above-described institute
The wheel system stated, the wheel system are installed on the car body.
Technical solution provided by the present application can achieve it is following the utility model has the advantages that
Wheel system provided herein includes wheel assembly and brake assemblies, and wheel assembly includes wheel and wheel shaft, braking
Component includes driving portion and friction portion, when needing to implement brake operating, brake force is transmitted to friction portion by driving portion, so that rubbing
Wiping portion is pressed against each other with wheel shaft, and then inhibits the rotation of wheel shaft, the final braking for realizing wheel.Each section in this wheel system it
Between can not use nested structure, when safeguarding to mobile device, dismantle the cover at wheel system, so that it may see above-mentioned
Each section also can targetedly safeguard each part mentioned above.Therefore, wheel system provided by the present application can simplify
The attended operation of mobile device.
It should be understood that the above general description and the following detailed description are merely exemplary, this can not be limited
Application.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of wheel system provided by the embodiment of the present application;
Fig. 2 is the cooperation schematic diagram of driving portion and wheel shaft in wheel system provided by the embodiment of the present application;
Fig. 3 is the movement locus schematic diagram of driving pedal in wheel system provided by the embodiment of the present application;
Fig. 4 is another cooperation schematic diagram of driving portion and wheel shaft in wheel system provided by the embodiment of the present application;
Fig. 5 is the explosive view in friction portion in structure shown in Fig. 4.
Appended drawing reference:
10- wheel;
11- wheel shaft;
The first shaft part of 110-;
The first universal joint of 111-;
The second shaft part of 112-;
The second universal joint of 113-;
114- third shaft part;
20- driving portion;
200- screw rod;
201- driving pedal;
21- friction portion;
The first friction block of 210-;
The second friction block of 211-;
212- wheel shaft mating part;
The first thread plate of 213-;
213a- plate body;
213b- link block;
The second thread plate of 214-;
30- bearing.
The drawings herein are incorporated into the specification and forms part of this specification, and shows the implementation for meeting the application
Example, and together with specification it is used to explain the principle of the application.
Specific embodiment
The application is described in further detail below by specific embodiment and in conjunction with attached drawing.
As shown in Figure 1-3, the embodiment of the present application provides a kind of wheel system, which applies to mobile device
In, such as Portable digital X-ray apparatus, to realize the movement of mobile device.This wheel system may include at least two wheel assemblies
And brake assemblies, wheel assembly include wheel 10 and wheel shaft 11, brake assemblies include driving portion 20 and friction portion 21.Wheel assembly is vehicle
The movable part of wheel system can drive wheel 10 to rotate, can also manually apply driving force, utilize wheel 10 by wheel shaft 11
Frictional force drives wheel 10 between the brace foundation (such as ground) of mobile device rotates.Wheel may be implemented in brake assemblies
The braking of system, wherein driving portion 20 directly bears the brake force of operator's application, and friction portion 21 then can be in driving portion 20
Under the action of be in contact with wheel shaft 11, to be braked to wheel shaft 11.
Specifically, one end of wheel shaft 11 is fixedly connected with wheel 10, and the other end is flexibly connected with friction portion 21, such as is rotated
Connection, that is to say, that when wheel 10 rotates, wheel shaft 11 can be rotated relative to friction portion 21.Wheel shaft 11 can be pacified by bearing 30
In the other parts of mobile device, bearing 30 is that wheel shaft 11 provides support force.Driving portion 20 and friction portion 21 are sequentially connected,
Driving portion 20 can drag friction portion 21 so that friction portion 21 is pressed against each other with wheel shaft 11.For example, driving portion 20 can be to friction portion
21 apply telescopic brake force, so that direction stretching motion of the friction portion 21 to close wheel shaft 11, and then offset with wheel shaft 11
Pressure, brakes wheel shaft 11.
As shown in the above, when needing to implement brake operating, brake force is transmitted to friction portion 21 by driving portion 20, is made
It obtains friction portion 21 to be pressed against each other with wheel shaft 11, and then inhibits the rotation of wheel shaft 11, the final braking for realizing wheel 10.This wheel system
In each section between can not use nested structure, when safeguarding to mobile device, dismantle the cover at wheel system, just
It can see each part mentioned above, also each part mentioned above can targetedly be safeguarded.Therefore, the embodiment of the present application provides
Wheel system can simplify the attended operation of mobile device.
Further, above-mentioned friction portion 21 may include the first friction block 210 and the second friction block 211, the two be used for
Two wheel assemblies are connected.Specifically, the wheel shaft 11 of the two wheel assemblies respectively with the first friction block 210 and the second friction block
211 rotation connections.At least one of first friction block 210 and the second friction block 211 are upper to have arc-shaped inner wall, this is arc-shaped
Inner wall is used to fit with the outer peripheral surface of wheel shaft 11.Such setting allows under normal circumstances, and the outer peripheral surface of wheel shaft is circle
Outer peripheral surface, therefore after the upper arc-shaped inner wall of setting of at least one of the first friction block 210 and the second friction block 211, so that it may
Increase the contact area between the first friction block 210 and/or the second friction block 211 and wheel shaft 11, and then improves the reliable of braking
Property.Preferably, the radial dimension of aforementioned arc-shaped inner wall can be equal or bigger with the radial dimension of the outer peripheral surface of wheel shaft 11
In the radial dimension of the outer peripheral surface of wheel shaft 11, the first friction block 210 and/or the second friction block 211 and wheel are further increased with this
Contact area between axis 11.
During mobile device is mobile, the braking of each wheel assembly can carry out simultaneously, progress when can also be different, together
Each wheel assembly is braked when Shi Jinhang, and mobile device stops completely, and when not carrying out simultaneously, part wheel assembly still can be moved,
And then the operation such as turn for realizing mobile device.In view of this, the embodiment of the present application provides for the specific structure in friction portion 21
Following two kinds of embodiments, certainly, friction portion 21 can also use other structures, and the application is not limited thereto.
The first, the first friction block 210 and the second friction block 211 form integral structure.That is, passing through driving portion
The 20 single brake force of output, so that it may while realizing the braking of two wheel shafts 11.In such structure, the structure of driving portion 20 compares
Simply, the brake operating of two wheel assemblies can carry out simultaneously, and then realize the reliable braking of wheel system.
Second, the first friction block 210 and the second friction block 211 form split type structure, that is, the two is relatively independent, mutually
The process that can be mutually transmitted without active force.At this point, driving portion 20 may include the first driving portion and the second driving portion, the first driving
Portion and the first friction block 210 are sequentially connected, and the second driving portion and the second friction block 211 are sequentially connected.Obviously, under such structure,
The first friction block 210 and the second friction block 211 is operated alone by the first driving portion and the second driving portion, makes part wheel assembly can
To be in on-position, another part wheel assembly is then kept in motion.It should be noted that the first driving portion herein and
The structure of two driving portions may be the same or different.
In order to simplify the structure in friction portion 21, the transmitting of brake force can be realized by the way of being threadedly engaged.Specifically,
As shown in Fig. 2, at least one of the first friction block 210 and the second friction block 211 are thread friction block, driving portion 20 includes spiral shell
Bar 200, aforementioned threads friction block may include wheel shaft mating part 212, the first thread plate 213 and the second thread plate 214, the first spiral shell
Card 213 and the second thread plate 214 are connected to the opposite sides of wheel shaft mating part 212, and the two is oppositely arranged, and the two
On open up driving screw thread for being threadedly engaged with screw rod 200.Wheel shaft 11 can be rotationally connected with wheel shaft mating part 212
On.
In order to better ensure that the brake force between driving portion 20 and friction portion 21 is transmitted, the driving of the first thread plate 213
The rotation direction of screw thread is oppositely oriented with the driving screw thread of the second thread plate 214.For example, along when rotating clockwise screw rod 200, first
Thread plate 213 and the second thread plate 214 are relatively close, realize braking, when rotating backward screw rod 200, the first thread plate 213 and the
Two thread plates 214 are relatively distant from, and release braking.
It is previously mentioned, screw rod 200 can be rotated directly to drive friction portion 21, but directly rotation screw rod 200 is less square
Just, therefore for ease of operation, driving portion 20 may also include driving pedal 201, the driving pedal 201 and the fixed company of screw rod 200
It connects, and forms the driving trip rotated around the axis of screw rod 200 after the receiving driving force of driving pedal 201, specifically refer to Fig. 3,
Dotted portion in Fig. 3 indicates the position at place after the rotation certain amplitude of driving pedal 201.Operator can be directly to driving
Pedal 201 applies brake force, so that driving pedal 201 drives screw rod 200 to rotate, and then drives the first thread plate 213 and second
214 relative motion of thread plate to realize brake operating, or releases brake operating.Driving pedal 201 into one in this embodiment
Step can be set to plate, in order to process.
When the first thread plate 213 driving screw thread rotation direction and the second thread plate 214 driving screw thread it is oppositely oriented when,
It, can be using following knot in order to more easily realize the connection between screw rod 200 and the first thread plate 213, the second thread plate 214
Structure: at least one of the first thread plate 213 and the second thread plate 214 include plate body and link block, open up installation on the plate body
Hole, link block are fixed in the mounting hole, and driving screw thread above-mentioned is opened on the link block.It is with structure shown in Fig. 4 and Fig. 5
Example, the first thread plate 213 may include plate body 213a and link block 213b, and link block 213b can be first detached from plate body 213a, by
Can be bigger in the aperture of mounting hole, therefore screw rod 200 can be operated and be threadedly engaged with the second thread plate 214, and pass through the peace
Hole is filled, then link block 213b is screwed on screw rod 200, it is finally that link block 213b and plate body 213a is fixed.Link block
Fixed form between 213b and plate body 213a can be welding, screwing, riveting etc. form.
It is to be appreciated that relatively independent between wheel shaft 11 in above-mentioned each wheel assembly, each wheel shaft 11 can be in contact with each other, but
It is that such mode can aggravate abrasion between wheel shaft 11.In order to alleviate this problem, can be set between the wheel shaft 11 of wheel assembly
Preset interval is set, further, usual wheel assembly is oppositely arranged two-by-two, therefore is had between the wheel shaft 11 of two wheel assemblies pre-
If interval, so that not contacting between each wheel shaft 11, reaches foregoing purpose.The size of preset interval herein can be according to practical feelings
Condition flexibly determines, herein with no restriction to this.
In a kind of embodiment, wheel shaft 11 may include the first shaft part 110 being successively sequentially connected, the first universal joint 111,
Two shaft parts 112, the second universal joint 113 and third shaft part 114, the first shaft part 110 are fixedly connected with wheel 10, third shaft part 114
It is rotationally connected in friction portion 21, the second shaft part 112, can be relative to the first shaft part 110 under the action of the first universal joint 111
Axis be obliquely installed, under the action of the second universal joint 113, third shaft part 114 is obliquely installed relative to the second shaft part 112.
It adopts the structure, certain space can be reserved between two wheel assemblies, which can avoid between two wheel assemblies
Other structures so that the structure of mobile device is more compact.
Further, the axis collinear of the third shaft part 114 of two wheel assemblies, to simplify the structure of wheel system.In addition,
In above-mentioned wheel system provided by the embodiments of the present application, two wheel assemblies can be in symmetrical junction relative to the center of the two
Structure is simplified manufacturing procedure, the assembly process etc. of wheel system with this, and then reduces the production cost of wheel system.
Based on above structure, the embodiment of the present application also provides a kind of Portable digital X-ray apparatus, and portable digital X is penetrated
Line machine may include wheel system described in car body and any of the above-described embodiment, and the wheel shaft 11 of the wheel system can pass through
Bearing 30 is installed on car body.
The foregoing is merely preferred embodiment of the present application, are not intended to limit this application, for the skill of this field
For art personnel, various changes and changes are possible in this application.Within the spirit and principles of this application, made any to repair
Change, equivalent replacement, improvement etc., should be included within the scope of protection of this application.