CN207496388U - Castor structure - Google Patents
Castor structure Download PDFInfo
- Publication number
- CN207496388U CN207496388U CN201721191481.4U CN201721191481U CN207496388U CN 207496388 U CN207496388 U CN 207496388U CN 201721191481 U CN201721191481 U CN 201721191481U CN 207496388 U CN207496388 U CN 207496388U
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- CN
- China
- Prior art keywords
- axle
- castor
- tire
- rotating shaft
- connecting rod
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
- B60B33/00—Castors in general; Anti-clogging castors
- B60B33/006—Castors in general; Anti-clogging castors characterised by details of the swivel mechanism
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Vehicle Body Suspensions (AREA)
- Steering-Linkage Mechanisms And Four-Wheel Steering (AREA)
- Handcart (AREA)
Abstract
The utility model provides a kind of Castor structure, in the structure of castor of the rear of rotating shaft with axle, by making the direction of tire of left and right settings consistent, can carry out stable traveling.Castor structure is configured to have：Rotating part (3) has the rotating shaft (33) that the castor (2) set on the left and right of vehicle body (10) is made to be rotated centered on vertical axis；And axle moving portion (4), the rotating part (3) is installed on, axle (55) is made to be moved up in the front and back of the rotating shaft (33) using the rotary force of the tire (20).Moreover, the front side in the support rod (21) of bearing left and right castor (2) is equipped with connecting rod (8).The connecting rod (8) is linked by articulated section (81) and axle guide part (41), and trapezoidal connecting rod is formed using rotating shaft (33), articulated section (81).
Description
Technical field
The utility model is related to a kind of structure of the castor with revolute function, in more detail, even being related to one kind
Has the Castor structure that irregular ground also can steadily make the direction of tire consistent.
Background technology
It is as shown in Figure 7 for the structure of common castor.In the figure 7, reference numeral 91 is represented mounted on vehicle body
The rotating part of lower surface etc. has the rotating shaft 92 being rotated by 360 ° centered on vertical axis.In addition, reference numeral 93 represents fork
Part links the rotating shaft 92 and tire 94 with eccentric state.In addition, reference numeral 94 represents tire, it is mounted on opposite
In on the eccentric axle 95 of rotating shaft 92.In the case where vehicle body is made to advance using such castor, it is located at axle 95
The rear of rotating shaft 92 makes tire 94 be moved in a manner of following rotating shaft 92 (the upper figure of Fig. 7).On the other hand, make vehicle body
In the case of being moved in the reverse direction from this position, as shown in figure below of Fig. 7, tire is made to invert 180 degree together with fork 93,
Vehicle body is moved in a manner of tire 94 to be made to follow rotating shaft 92.
But due in such a configuration, vehicle body is made to be needed from the case that preceding line direction moves in the reverse direction
Tire 94, fork 93 is made to invert 180 degree, therefore, vehicle body may be towards undesirable direction in this Umklapp process.
Then, it is proposed that such a to make opposite sidesway of the axle to rotating shaft in the case where inverting tire
The structure (patent document 1) of dynamic castor.The castor has：Revolution with the rotating shaft rotated around vertical axis
Portion；And the axle moving portion that axle is made to be moved with the forward or backward rotation of tire to the rear of rotating shaft.According in this way
Structure, due to not needing to make tire, fork reversion 180 degree, when being moved in the reverse direction from preceding line direction, vehicle body
It will not be towards undesirable direction.
Patent document
Patent document 1：No. 4610700 bulletins of Japanese Patent No.
But also there is following problem in such a configuration.
That is, in the case where sharp tractoration is mounted with the vehicle body of such castor, if having on the ground
Bumps etc., then the tire of each castor is sometimes towards different directions.
If in addition, make the direction of the tire of left and right castor towards identical angle, when vehicle body turns round, because of left and right
The radius of turn of tire is different, can generate thrust load.
Utility model content
Then, the utility model is conceived to the above subject and completes, and it is an object of the present invention to provide a kind of Castor structure, by making a left side
The direction of the tire of the castor of right setting is consistent, can steadily travel.
That is, the utility model in order to solve the above problems, provides a kind of Castor structure, equipped with being turned round by tractive force
Left and right castor, each castor are configured to have：Rotating part has the rotating shaft rotated centered on vertical axis；And
Axle moving portion is installed on the rotating part, makes axle in the rotating shaft using rotary force when moving forward and backward of tire
Front and back move up, moreover, equipped with the connecting rod for linking the left and right axle moving portion by articulated section.
According to this structure, since rear of the axle to rotating shaft can be made in the case where not making tire reversion 180 degree
It moves and turns round, and connecting rod can be utilized to make the direction of left and right tire consistent, therefore, even if on having irregular ground
It can also ensure that the stability of traveling.
In addition, in such utility model, returned by the left and right articulated section of the connecting rod and the left and right of left and right settings
Shaft forms trapezoidal connecting rod.
According to this structure, the angulation change that left and right tire can be made in revolution is angle of the lubrication groove with foreign steamer.
Moreover, the connecting rod is set on to the action direction side of the tractive force of the rotating shaft.
According to this structure, since using tractor, when being drawn, the trapezoidal connecting rod can be being utilized, with revolution
Central side sets the axle center of left and right tire as the mode of focus, therefore, it is possible to prevent thrust load.
Utility model effect
According to the utility model, a kind of Castor structure, equipped with the left and right castor turned round by tractive force, each time
Turn castor to be configured to have：Rotating part has the rotating shaft rotated centered on vertical axis；And axle moving portion, it is installed on this
Rotating part using rotary force when moving forward and backward of tire, makes axle be moved up in the front and back of the rotating shaft, and
And equipped with the connecting rod for linking the left and right axle moving portion by articulated section, therefore, it is possible to which tire is not made to invert 180 degree
In the case of make rear from axle to rotating shaft it is mobile and turn round, in addition, since connecting rod can be utilized to make the court of left and right tire
To consistent, therefore, even if on having irregular ground, riding stability can also ensure that.
Description of the drawings
Fig. 1 is the figure of the Castor structure for the embodiment for representing the utility model.
Fig. 2 is the exploded perspective view of the castor in the embodiment.
Fig. 3 is the figure of the state in the pawl portion and axle when representing the advance in the embodiment.
Fig. 4 is the figure of the state in the pawl portion and axle when representing the retrogressing in the embodiment.
Fig. 5 is the figure of turn state when representing for the connecting rod in the embodiment to be arranged on rear.
Fig. 6 is the figure of turn state when representing for the connecting rod in the embodiment to be arranged on front.
Fig. 7 is the figure for the common castor for representing conventional example.
Reference sign
1 Castor structure
2 castors (20 tires, 21 support rods)
3 rotating parts (31 upper shaft bearing portion, 32 downside bearing portions, 33 rotating shafts, 34 external thread parts)
4 axle moving portions (41 axle guide parts, 42 threaded holes, 43 guide surfaces, 44 slots, 45 slot holes)
5 axle bearing parts (51 guide plates, 52 pins, 53 bearings, 54 bolts, 55 axles)
6 pawl portions (61 claws, 62 front ends, 63 fulcrums, 64 lower surfaces)
7 swivel plates (71 protrusion)
8 connecting rods (81 articulated section)
10 vehicle bodies
Specific embodiment
Hereinafter, one embodiment of the utility model is illustrated with reference to attached drawing.
As shown in Figure 1, the Castor structure 1 in the embodiment has revolution foot in the left and right of vehicle body 10 (with reference to Fig. 5 etc.)
Wheel 2, when advancing, the tractive force using the tractor (not shown) from front makes castor 2 follow the direction, is retreating
When, axle 55 is made to be moved to opposite side in a manner of following rotating shaft 33 in the case of can making tire 20 in nonreversible 180 degree.
And, which is characterized in that make by connecting rod 8 to link between each castor 2, as a result, in advance, the when of retrogressing, make each
The direction of the tire 20 of a castor 2 is consistent, it can be ensured that riding stability.Hereinafter, with reference to attached drawing to present embodiment into
Row explanation.In addition, as the vehicle body 10 using the Castor structure 1, for the vehicle body drawn by the tractor in front, example
Such as, as being stowed the agricultural machinery of machine travel, applied by tractions such as automobiles by tractor etc..In addition, for the ease of saying
It is bright, the direction drawn by tractor is illustrated as in front of.
First, as shown in Fig. 2, the left and right castor 2 for forming the Castor structure 1 is configured to have：With around vertical axis
The rotating part 3 of the rotating shaft 33 of rotation；And relative to the rotating shaft 33 make axle 55 correspond to direction of travel and in the longitudinal direction
Mobile axle moving portion 4 etc..Moreover, by using such axle moving portion 4, as existing structure, wheel can be made
The mode that tire 20 follows rotating shaft 33 in the case of nonreversible 180 degree is formed.
The rotating part 3 of the castor 2 is set on two end sides of the support rod 21 of bridge formation left and right castor 2, in phase up and down
The center of upper shaft bearing portion 31, downside bearing portion 32 to ground setting is equipped with shaft insertion hole 35, can be here from upper and lower directions
Rotating shaft 33 is inserted into certain gap.External screw thread is formed in the fore-end for the rotating shaft 33 for being inserted into the shaft insertion hole 35
Portion 34 is inserted into and is fixed in the threaded hole up and down 42 in the center for the axle guide part 41 for forming axle moving portion 4.
Moreover, rotating shaft 33 is inserted and secured in the threaded hole 42 of axle guide part 41 in this way, can be inserted with being inserted into axis
The center for entering the rotating shaft 33 in hole 35 is axis, and axle moving portion 4 is made to be rotated around vertical axis.
On the other hand, turning round axle 55 using the rotary force of tire 20 mounted on the axle moving portion 4 of the rotating part 3
The front and back of axis 33 move up, and axle moving portion 4 is configured to have：Axle with the guide surface 43 parallel with tire 20 is led
To part 41；The axle bearing part 5 formed in a manner of it can in the longitudinal direction be slided along the axle guide part 41；And make this
Pawl portion 6 that the axle 55 of axle bearing part 5 moves in the longitudinal direction with the rotary force of tire 20 etc..
Wherein, axle guide part 41 is to form the guide surface 43 parallel with tire 20 and parallel slot 44 opposite up and down
Mode is set.Moreover, the guide plate 51 for making axle bearing part 5 along the slot 44 and guide surface 43 slides in the longitudinal direction.
In order to swimmingly be moved along the slot 44 of axle guide part 41, it is equipped in the rear and front end of the guide plate 51 upper and lower
The pin 52 just projected upwards by being equipped with bearing 53 etc. in the front end of the pin 52, reduces the friction inside slot 44.
In addition, it is equipped on the guide surface 43 along slot hole 45 in the front-back direction.The slot hole 45 makes axle 55 opposite time
Setting makes the eccentric distance that axle guide part 41 slides in the longitudinal direction when shaft 33 is eccentric, and bolt 54 is mounted on guide plate 51
Back side, abut bolt 54 and the inside of slot hole 45.Axle 55 can move in the range of slot hole 45 as a result, pass through
Axle 55 is located at turn around the rear of axis 33, revolution when can be advanced, in addition, on the contrary, by being located at back axle 55
The front of shaft 33, revolution when can be retreated.
Pawl portion 6 makes the axle 55 forcibly be moved along slot hole 45, is configured to make vehicle using the rotary force of tire 20
Axis 55 is moved up in the front and back of rotating shaft 33.As shown in Figure 2 to 4, which is configured in axle guide part 41
Upper surface is equipped with：The claw 61 that the front and rear a pair for enabling each front end 62 (with reference to Fig. 3, Fig. 4) opposite rotates；And with energy
Enough swivel plates 7 of protrusion 71 abutted with the front end 62 of the claw 61.The upper table of the claw 61 to be set on axle guide part 41
Move up and down each front end 62 centered on the fulcrum 63 in face, on the other hand, swivel plate 7 is integrally rotated with tire 20.Separately
Outside, on the surface of the swivel plate 7, multiple protrusions 71 are equipped with concentric circles, by the way that tire 20 is made to advance, as shown in figure 3, making
Swivel plate 7 is rotated to the direction, and the protrusion 71 of the swivel plate 7 is made to be abutted (on Fig. 3 with the front end 62 of the claw 61 of front side
Figure).At this point, being collided by protrusion 71 and the front end 62 of claw 61, then, the movement of swivel plate 7 is limited, such as Fig. 3 figure below
Shown, axle 55 moves in a manner that the slot hole 45 along axle guide part 41 is rearward kept out of the way.Axle 55 is more than revolution as a result,
Axis 33 rearward moves.Due in the position, in a manner of the lower surface 64 of the claw 61 of the protrusion 71 of swivel plate 7 to touch rear
Contact, can continue to rotate tire 20.If on the contrary, make vehicle body 10 from state retrogressing, as shown in the upper figures of Fig. 4, tire 20
Counter-rotating, along with this, swivel plate 7 is also rotated to the same direction.Then, set on the protrusion 71 of the swivel plate 7 and rear
The front end 62 of claw 61 collides, and axle 55 in a manner of avoiding its rotary force along slot hole 45, move (under Fig. 4 forwards by side
Figure).Moreover, in the state of axle 55 is made to be moved to the front side of slot hole 45, make the protrusion 71 with the claw 61 with front
The mode that lower surface 64 touches contacts, and tire 20 is only allowed to be rotated in the front of slot hole 45.Thereby, it is possible to make axle when advancing
55 are located at turn around the rear of axis 33 and allow to turn round, and axle 55 can be made to be located at turn around the front of axis 33 when retreating and allowed
Revolution.
But in this way it is moved forward and backward axle 55, it does not need to that tire 20 is made to invert 180 degree, can make after just retreating
Directionality stablize, have on ground it is concave-convex in the case of, left and right castor 2 can be respectively facing different directions sometimes.Cause
This, in the present embodiment, as shown in Figure 1, left and right axle moving portion 4 is made to link by articulated section 81 using connecting rod 8, by
This, the direction that can make the tire 20 of left and right castor 2 is consistent.In addition, in the castor shown in Fig. 7 as conventional example
Structure in, if due to that equipped with such connecting rod 8, cannot invert tire 94, therefore, only as in the present embodiment
Only make that in the structure that axle 55 moves in the longitudinal direction such connecting rod 8 can be equipped with.
As shown in Figure 1, in the case where installing the connecting rod 8, left and right axle moving portion 4 is installed on by articulated section 81
Axle guide part 41.At this point, the connecting rod 8 is set in parallel the front side in support rod 21, pass through left and right rotating shaft 33 and a left side
Right articulated section 81 forms link mechanism.The distance of the left and right articulated section 81 is shorter than the distance of left and right rotating shaft 33, passes through a left side as a result,
Right-hand rotation axis 33 and articulated section 81 form trapezoidal connecting rod.
In addition, in the case where forming the trapezoidal connecting rod, if connecting rod 8 to be set on to the rear of support rod 21, in left and right
When direction is turned round, trapezoidal connecting rod deforms as shown in Figure 5.The angle of tire 20 is changed in a manner of respectively different as a result, and
At this point, when being turned round to direction as indicated by the arrows in fig. 5, the angle of the tire 20 of inside becomes smaller with respect to direction of travel, outside
The angle of tire 20 become larger with respect to direction of travel.Therefore, opposite side of the axle center of tire 20 in centre of gyration side links focus,
Generate thrust load.Therefore, in this embodiment, as shown in fig. 6, the tractive force that connecting rod 8 is set on to support rod 21 is made
Direction side (front).With this configuration, when vehicle body 10 turns round, the angle of the tire 20 of inside becomes larger, in addition, outside
The angle of tire 20 become smaller.The axle center of tire 20 links focus in centre of gyration side as a result, it is not easy to generate thrust load.
Next, to when to being turned round while there is the vehicle body 10 of the Castor structure formed in this way 1 to draw
And action when being converted in the longitudinal direction into line direction illustrates.
First, in the case where vehicle body 10 is made to move forwards using tractor, the tire 20 of vehicle body 10 is to by tractor
The direction of traction rotates.Then, as shown in figure 3, swivel plate 7 is rotated with the rotation of the tire 20, on the surface
Protrusion 71 and the front end 62 of the claw 61 in front collide.Then, make axle 55 in a manner that swivel plate 7 is kept out of the way from there backward
Fang Yidong.Axle 55 is located at turn around the rear of axis 33 as a result, tire 20 can be made to be followed according to lead when advancing.
At this point, to vehicle body 10 is made to be turned round to the direction shown in figure below of Fig. 6, then tire 20 follows lead and to return
It is turned round centered on shaft 33.At this point, by the connecting rod 8 linked with left and right castor 2, make the tire of castor 2
20 direction is consistent in a same direction.Moreover, because the articulated section 81 by the rotating shaft 33 of support rod 21, connecting rod 8
Trapezoidal connecting rod is formed, the angle therefore, it is possible to make the tire 20 of the inside of gyratory directions significantly changes, and can make revolution side
The angle of tire 20 outward changes smaller, and the axle center of tire 20 can be made to link focus in centre of gyration side.As a result, can
Enough prevent thrust load.
On the other hand, when being converted in the reverse direction into line direction from the state advanced in this way, traction is made by tractor
Power rearward acts on.Then, tire 20 rotates in the reverse direction, along with this, swivel plate 7 also rotates in the reverse direction.Then,
As shown in figure 4, the protrusion 71 of swivel plate 7 and the front end 62 of the claw 61 at rear collide, side of the swivel plate 7 to keep out of the way from there
Formula forwards move by side.Moreover, rotate tire 20 in the state of axle 55 is made to be located at turn around the front of axis 33.As a result, such as
As shown in Fig. 7 of conventional example, by make in the case where tire 94 is not made to invert 180 degree axle 55 with respect to rotating shaft 33 and
Front and back switch up, it can be ensured that the directional stability during conversion of the direction marching forward and retreat and are having irregular ground
On riding stability when driving.
Moreover, when rearward moving in this way, when turning round vehicle body 10, increase gyratory directions also with trapezoidal connecting rod
The angle of the tire 20 of inside, and reduce the angle of the tire 20 on the outside of gyratory directions.As a result, since the axle center of tire 20 exists
Centre of gyration side links focus, therefore, it is possible to prevent the generation of thrust load.
In this way, according to the above embodiment, equipped with the Castor structure of left and right castor 2 turned round by tractive force
In 1, each castor 2 is configured to have：Rotating part 3 with the rotating shaft 33 rotated centered on vertical axis；And installation
Make axle on the front-rear direction of the rotating shaft 33 in the rotating part 3 and using rotary force when moving forward and backward of tire 20
Mobile axle moving portion 4, moreover, equipped with the connecting rod 8 for linking the left and right axle moving portion 4 by articulated section 81, therefore,
Can not invert tire 20 makes axle 55 to the rear movement of rotating shaft 33 and turns round in 180 degree, in addition, due to that can utilize
Connecting rod 8 makes the direction of left and right tire 20 consistent, therefore, even if on having irregular ground, can also ensure that driving stability
Property.
In addition, due to forming ladder by the left and right articulated section 81 of the connecting rod 8 and the left and right rotating shaft 33 of left and right settings
Shape connecting rod, the angulation change therefore, it is possible to make left and right tire 20 in revolution are angle of the lubrication groove with foreign steamer.
Moreover, because the connecting rod 8 is set on to the action direction side of the tractive force of the rotating shaft 33, therefore, it is possible to
The axle center of left and right tire 20 is made to link in a manner that centre of gyration side becomes focus, the generation of thrust load can be prevented.
In addition, the utility model is not limited to the above embodiment, can implement in many ways.
For example, it in the above-described embodiment, is arranged in case of drawing vehicle body 10 using tractors such as tractor, automobiles
Explanation is lifted, but in the case of using human hand traction vehicle body 10 or in the case of pushing vehicle body 10, same knot can also be applied
Structure.In addition, in the case of vehicle body as promotion 10, connecting rod 8 is set on the rear side of support rod 21 and forms trapezoidal company
Bar.
In addition, in the above-described embodiment, link left and right castor 2 using support rod 21, but not limited to this, it can also
Castor 2 is respectively arranged in frame, plate of vehicle body 10 etc..In this case, it is led by the frame, plate, rotating shaft 33, axle
Trapezoidal connecting rod is formed to part 41, articulated section 81, connecting rod 8.
Moreover, in the above-described embodiment, the protrusion 71 of swivel plate 7 is made to be collided with claw 61 and move axle 55, but
In addition to this, in the mechanism for axle 55 being made to move in the longitudinal direction using the rotary force of tire 20, connection can also be utilized
Bar 8 links left and right castor 2.
Claims (3)
1. a kind of Castor structure, equipped with the left and right castor turned round by tractive force,
The Castor structure is characterized in that,
Each castor is configured to have：
Rotating part, the rotating shaft for having centered on vertical axis and rotating；And
Axle moving portion is installed on the rotating part, makes axle in the revolution using rotary force when moving forward and backward of tire
The front and back of axis move up,
Moreover, the connecting rod equipped with the axle moving portion by articulated section connection left and right.
2. Castor structure according to claim 1, which is characterized in that
Trapezoidal connecting rod is formed by the left and right articulated section of the connecting rod and the left and right rotating shaft of left and right settings.
3. Castor structure according to claim 2, which is characterized in that
The connecting rod is set on to the action direction side of the tractive force of the rotating shaft.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2017063394A JP2018165112A (en) | 2017-03-28 | 2017-03-28 | Caster structure |
| JP2017-063394 | 2017-03-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207496388U true CN207496388U (en) | 2018-06-15 |
Family
ID=62498186
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721191481.4U Active CN207496388U (en) | 2017-03-28 | 2017-09-15 | Castor structure |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP2018165112A (en) |
| KR (1) | KR20180109649A (en) |
| CN (1) | CN207496388U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20220326716A1 (en) * | 2019-09-27 | 2022-10-13 | Nec Corporation | Movement control method, movement control apparatus, movement control system, and program |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7199706B2 (en) * | 2019-02-20 | 2023-01-06 | 株式会社タカキタ | caster structure |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0081613B1 (en) * | 1981-12-15 | 1986-02-26 | The Firestone Tire & Rubber Company | Trailer with mass restraint |
| US5924716A (en) * | 1996-10-23 | 1999-07-20 | Chassis Dynamics, Inc. | Method and apparatus for connecting a towed vehicle to a towing vehicle |
| JP4610700B2 (en) * | 2000-07-21 | 2011-01-12 | 株式会社タカキタ | Free wheels on tractor work machines. |
-
2017
- 2017-03-28 JP JP2017063394A patent/JP2018165112A/en active Pending
- 2017-09-15 CN CN201721191481.4U patent/CN207496388U/en active Active
- 2017-10-26 KR KR1020170140324A patent/KR20180109649A/en not_active Application Discontinuation
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20220326716A1 (en) * | 2019-09-27 | 2022-10-13 | Nec Corporation | Movement control method, movement control apparatus, movement control system, and program |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20180109649A (en) | 2018-10-08 |
| JP2018165112A (en) | 2018-10-25 |
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