CN109533061A - A kind of slotting riveting formula caterpillar belt structure and crawler belt - Google Patents
A kind of slotting riveting formula caterpillar belt structure and crawler belt Download PDFInfo
- Publication number
- CN109533061A CN109533061A CN201910053785.1A CN201910053785A CN109533061A CN 109533061 A CN109533061 A CN 109533061A CN 201910053785 A CN201910053785 A CN 201910053785A CN 109533061 A CN109533061 A CN 109533061A
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- slotting
- slotting riveting
- mounting hole
- riveting
- bearing pin
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- 239000000758 substrate Substances 0.000 claims abstract description 53
- 230000006698 induction Effects 0.000 claims abstract description 49
- 238000009434 installation Methods 0.000 claims description 12
- 230000002035 prolonged effect Effects 0.000 claims 1
- 238000005516 engineering process Methods 0.000 abstract description 8
- 230000009286 beneficial effect Effects 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 241000219098 Parthenocissus Species 0.000 description 3
- 230000001939 inductive effect Effects 0.000 description 3
- 239000000203 mixture Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000411 inducer Substances 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 210000003205 muscle Anatomy 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D55/00—Endless track vehicles
- B62D55/08—Endless track units; Parts thereof
- B62D55/18—Tracks
Abstract
Slotting riveting formula caterpillar belt structure disclosed in the present application, compared with prior art, comprising: crawler belt substrate and induction tooth；The first slotting riveting auxiliary section on crawler belt substrate；On induction tooth, and the second slotting riveting auxiliary section matched with the first slotting riveting auxiliary section；The first bearing pin mounting hole set on crawler belt substrate side；The second bearing pin mounting hole set on the crawler belt substrate other side；Third bearing pin mounting hole set on induction tooth side；The 4th bearing pin mounting hole set on the induction tooth other side；It is arranged in the first bearing pin mounting hole, the first alignment pin of third bearing pin mounting hole；It is arranged in the second alignment pin of the second bearing pin mounting hole, the 4th bearing pin mounting hole.Slotting riveting formula caterpillar belt structure provided by the present application can simplify assembly technology compared to existing technologies, save the cost, and significant the reliability for improving caterpillar belt structure.The application further relates to a kind of crawler belt, equally has above-mentioned beneficial effect.
Description
Technical field
This application involves caterpillar belt structure design fields, more specifically more particularly to a kind of slotting riveting formula caterpillar belt structure,
The application further relates to a kind of crawler belt.
Background technique
Crawler belt is by active wheel drive, around the flexible chain link of driving wheel, bogie wheel, inducer and carrier wheel.Crawler belt
By structure compositions such as creeper tread and track pins.Track pin is used to each creeper tread connecting composition track link.Traditional shoe
There is hole at the both ends of band plate, engage with driving wheel, and there is induction tooth at middle part, are used to regulatory crawler belt, and prevent Vehicular turn or roll row
Crawler belt falls off when sailing, and is reinforcing anti-skidding muscle with having on one side for ground face contact, to improve robustness and crawler belt and the ground of creeper tread
Adhesive force.
In the prior art, the induction tooth of spliced crawler belt is fixed together generally by the mode riveted with crawler belt substrate
, the crawler belt substrate generally left and right 2 in this caterpillar belt structure is distributed in induction tooth two sides, part is more, assembles relatively multiple
It is miscellaneous, and induce tooth not firm in conjunction with crawler belt substrate, it is easy to appear the problem of loosening is even deviate from.
Therefore, how a kind of slotting riveting formula caterpillar belt structure is provided, structure is simple, convenient for simplifying processing technology, and can be true
It protects induction tooth and connect fastening with crawler belt substrate, improve the reliability of caterpillar belt structure, have become those skilled in the art and urgently solve
Certainly the technical issues of.
Summary of the invention
In order to solve the above technical problems, the application provides a kind of slotting riveting formula caterpillar belt structure, structure is simple, adds convenient for simplifying
Work technique, and can ensure that tooth is induced to connect fastening with crawler belt substrate, improve the reliability of caterpillar belt structure.The application further relates to one
Kind crawler belt, equally has above-mentioned beneficial effect.
Technical solution provided by the present application is as follows:
The application provides a kind of slotting riveting formula caterpillar belt structure, comprising: crawler belt substrate and induction tooth；On crawler belt substrate
One slotting riveting auxiliary section；On induction tooth, and the second slotting riveting auxiliary section matched with the first slotting riveting auxiliary section；Set on crawler belt base
First bearing pin mounting hole of plate side；The second bearing pin mounting hole set on the crawler belt substrate other side；Set on the of induction tooth side
Three bearing pin mounting holes；The 4th bearing pin mounting hole set on the induction tooth other side；It is arranged in the first bearing pin mounting hole, third pin shaft peace
Fill first alignment pin in hole；It is arranged in the second alignment pin of the second bearing pin mounting hole, the 4th bearing pin mounting hole.
Further, in a kind of preferred mode of the present invention, the first slotting riveting auxiliary section is specially to be set on crawler belt substrate
The first slotting riveting slot；Second slotting riveting auxiliary section is specially set to induction bottom of the tooth portion, and the first slotting riveting with the first slotting riveting slot cooperation
Column.
Further, in a kind of preferred mode of the present invention, the first slotting riveting auxiliary section is specially to be set on crawler belt substrate
The second slotting riveting column；Second slotting riveting auxiliary section is specially set to induction bottom of the tooth portion, and the second slotting riveting with the second slotting riveting column cooperation
Slot.
Further, in a kind of preferred mode of the present invention, the first slotting riveting auxiliary section includes: on crawler belt substrate
First slotting riveting slot and the second slotting riveting column；
Second slotting riveting auxiliary section includes: the first slotting riveting column set on induction bottom of the tooth portion, and with the first slotting riveting slot cooperation；And
Set on induction bottom of the tooth portion, and the second slotting riveting slot with the second slotting riveting column cooperation.
Further, in a kind of preferred mode of the present invention, the first slotting riveting column and the second slotting riveting column are cube or circle
Cylinder.
Further, in a kind of preferred mode of the present invention, the first slotting riveting column is cube, and the second slotting riveting column is cylinder
Body；Or first slotting riveting column be cylindrical body, the second slotting riveting column be cube.
Further, in a kind of preferred mode of the present invention, induction tooth includes: tooth ontology；Set on tooth ontology side, and
The first installation extension equipped with third bearing pin mounting hole；Set on the tooth ontology other side, and it is equipped with the of the 4th bearing pin mounting hole
Two installation extensions；Tooth ontology, the first installation extension, the second installation extension are integrally formed.
Further, in a kind of preferred mode of the present invention, riveting formula caterpillar belt structure is inserted further include: be set to the first positioning pin
Axis and the positive stop end card at the second alignment pin both ends.
Further, in a kind of preferred mode of the present invention, the first alignment pin is specially 1~3, the second positioning pin
Axis is specially 1~3.
The application also provides a kind of crawler belt comprising slotting riveting formula caterpillar belt structure as above.
A kind of slotting riveting formula caterpillar belt structure provided by the invention, compared with prior art, comprising: crawler belt substrate and induction tooth,
Crawler belt substrate is equipped with the first slotting riveting auxiliary section, and induction tooth is equipped with the slotting riveting cooperation of second matched with the first slotting riveting auxiliary section
Portion, crawler belt substrate side are equipped with the first bearing pin mounting hole, and the other side is equipped with the second bearing pin mounting hole, and induction tooth side is equipped with third
The bearing pin mounting hole other side is equipped with the 4th bearing pin mounting hole, and the first alignment pin is arranged in the first bearing pin mounting hole, third pin shaft
Mounting hole, the second alignment pin are arranged in the second bearing pin mounting hole, the 4th bearing pin mounting hole.In this way, slotting riveting provided by the present application
Formula caterpillar belt structure, it is only necessary to 1 crawler belt substrate and 1 induction tooth in a track section, a crawler belt compared to the prior art
The case where at least needing two crawler belt substrates to be assembled in section greatly reduces the quantity of part in caterpillar belt structure, simplifies dress
With technique, to correspondingly save human cost and time cost；In addition, crawler belt substrate and induction tooth not only pass through riveting,
Also crawler belt substrate and induction tooth four-way are positioned by pin shaft, it is ensured that induction tooth connect fastening with crawler belt substrate, compared to existing
For having technology, assembly technology can be simplified, save the cost, and significant the reliability for improving caterpillar belt structure.
Detailed description of the invention
In order to illustrate the technical solutions in the embodiments of the present application or in the prior art more clearly, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of application for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is the structural schematic diagram of slotting riveting formula caterpillar belt structure provided in an embodiment of the present invention；
Fig. 2 is the schematic diagram of crawler belt substrate provided in an embodiment of the present invention；
Fig. 3 is the schematic diagram of induction tooth provided in an embodiment of the present invention；
Fig. 4 is the schematic diagram at another visual angle of induction tooth provided in an embodiment of the present invention.
Specific embodiment
In order to make those skilled in the art more fully understand the technical solution in the application, below in conjunction with the application reality
The technical scheme in the embodiment of the application is clearly and completely described for the attached drawing for applying in example, it is clear that described embodiment
Only a part of the embodiment of the application, instead of all the embodiments.Based on the embodiment in the application, this field is common
Technical staff's every other embodiment obtained without making creative work belongs to the model of the application protection
It encloses.
It should be noted that it can directly exist when element is referred to as on " being fixed on " or " being set to " another element
On another element or indirectly setting on the other element；When an element is known as " being connected to " another element,
It can be directly to another element or be indirectly connected on another element.
It is to be appreciated that term " length ", " width ", "upper", under ", "front", "rear", "left", "right", "vertical",
The orientation or positional relationship of the instructions such as "horizontal", "top", "bottom" "inner", "outside" is that orientation based on the figure or position are closed
System is merely for convenience of description the application and simplifies description, rather than the device or element of indication or suggestion meaning must have
Specific orientation is constructed and operated in a specific orientation, therefore should not be understood as the limitation to the application.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include one or more of the features.It is multiple in the description of the present application ", " several " be meant that two or
Two or more, unless otherwise specifically defined.
It should be clear that structure depicted in this specification attached drawing, ratio, size etc., only to cooperate specification revealed
Content is not limited to the enforceable qualifications of the application, therefore does not have so that those skilled in the art understands and reads
Technical essential meaning, the modification of any structure, the change of proportionate relationship or the adjustment of size are not influencing the application institute energy
Under the effect of generation and the purpose that can reach, it should all still fall in techniques disclosed in this application content and obtain the range that can cover
It is interior.
Please be as shown in Figures 1 to 4, slotting riveting formula caterpillar belt structure provided by the embodiments of the present application, comprising: crawler belt substrate 1 and lure
Guide tooth 2；The first slotting riveting auxiliary section 101 on crawler belt substrate 1；Set on induction tooth 2 on, and with the first slotting riveting auxiliary section 101
The slotting riveting auxiliary section 201 of second matched；The first bearing pin mounting hole 102 set on 1 side of crawler belt substrate；Set on crawler belt substrate 1
Second bearing pin mounting hole 103 of the other side；Third bearing pin mounting hole 202 set on induction 2 side of tooth；It is another set on induction tooth 2
4th bearing pin mounting hole 203 of side；It is arranged in the first bearing pin mounting hole 102, the first alignment pin of third bearing pin mounting hole 202
3；It is arranged in the second bearing pin mounting hole 103, the second alignment pin 4 of the 4th bearing pin mounting hole 203.
The embodiment of the present invention provides a kind of slotting riveting formula caterpillar belt structure, compared with prior art, comprising: crawler belt substrate 1 and lures
Guide tooth 2, crawler belt substrate 1 are equipped with the first slotting riveting auxiliary section 101, and induction tooth 2 is equipped with to be matched with the first slotting riveting auxiliary section 101
The second slotting riveting auxiliary section 201,1 side of crawler belt substrate be equipped with the first bearing pin mounting hole 102, the other side be equipped with the second pin shaft installation
Hole 103, induction 2 side of tooth are equipped with 202 other side of third bearing pin mounting hole and are equipped with the 4th bearing pin mounting hole 203, the first positioning pin
Axis 3 is arranged in the first bearing pin mounting hole 102, third bearing pin mounting hole 202, and the second alignment pin 4 is arranged in the installation of the second pin shaft
Hole 103, the 4th bearing pin mounting hole 203.In this way, slotting riveting formula caterpillar belt structure provided by the present application, it is only necessary to 1 in a track section
A crawler belt substrate 1 and 1 induces tooth 2, at least needs two crawler belt substrates 1 to be filled in a track section compared to the prior art
With the case where, greatly reduce the quantity of part in caterpillar belt structure, simplify assembly technology, to correspondingly save human cost
And time cost；In addition, crawler belt substrate 1 and induction tooth 2 not only by riveting, also pass through pin shaft for crawler belt substrate 1 and induction tooth 2
Four-way positioning, it is ensured that induction tooth 2 connect fastening with crawler belt substrate 1, compared to existing technologies, can simplify assembler
Skill, save the cost, and significant the reliability for improving caterpillar belt structure.
Specifically, in embodiments of the present invention, the first slotting riveting auxiliary section 101 is specially first be set on crawler belt substrate 1
Insert riveting slot；Second slotting riveting auxiliary section 201 is specially the first slotting riveting column for being set to and inducing 2 bottom of tooth, and cooperating with the first slotting riveting slot.
Specifically, in embodiments of the present invention, the first slotting riveting auxiliary section 101 is specially second be set on crawler belt substrate 1
Insert riveting column；Second slotting riveting auxiliary section 201 is specially the second slotting riveting slot for being set to and inducing 2 bottom of tooth, and cooperating with the second slotting riveting column.
Specifically, in embodiments of the present invention, the first slotting riveting auxiliary section 101 include: on crawler belt substrate 1 first insert
Riveting slot 104 and the second slotting riveting column 105；
Second slotting riveting auxiliary section 201 includes: the first slotting riveting for being set to and inducing 2 bottom of tooth, and cooperating with the first slotting riveting slot 104
Column 207；And the second slotting riveting slot 208 for being set to induction 2 bottom of tooth, and cooperating with the second slotting riveting column 105.
Specifically, in embodiments of the present invention, the first slotting riveting column and the second slotting riveting column are cube or cylindrical body.
Specifically, in embodiments of the present invention, the first slotting riveting column is cube, and the second slotting riveting column is cylindrical body；Or the
One slotting riveting column is cylindrical body, and the second slotting riveting column is cube.Wherein, it inserts riveting slot or the cross sectional shape of slotting riveting column can be pros
Shape, rectangle, polygon, circle, ellipse or other rules or irregular shape, can also be combination of different shapes.Wherein,
The crawler belt substrate 1 that the present embodiment is related to is an entirety, and not split type split type crawler belt substrate 1 in the prior art is compared
For the prior art, structure is simple, more simplifies assembly technology.
Single-unit track body includes crawler belt substrate 1, induction tooth 2, alignment pin.Induction tooth 2 and crawler belt substrate 1 insert riveting one
It rises, alignment pin by crawler belt substrate 1 and induces 2 staff cultivation of tooth also cross the bearing pin mounting hole of crawler belt substrate 1 and induction tooth 2
Together, it overcomes induction tooth 2 in traditional caterpillar belt structure and is combined not firm, easily appearance loosening even abjection with crawler belt substrate 1
The problem of, compared with prior art, the reliability of caterpillar belt structure has obtained significant raising.
Specifically, in embodiments of the present invention, induction tooth 2 includes: tooth ontology 204；Set on 204 side of tooth ontology, and set
There is the first installation extension 205 of third bearing pin mounting hole 202；Set on 204 other side of tooth ontology, and it is equipped with the 4th pin shaft and installs
The second installation extension 206 in hole 203；Tooth ontology 204, first install extension 205, second install the one of extension 206 at
Type.
Specifically, in embodiments of the present invention, riveting formula caterpillar belt structure is inserted further include: be set to the first alignment pin 3 and the
The positive stop end card at two alignment pins, 4 both ends.
Specifically, in embodiments of the present invention, the first alignment pin 3 is specially 1~3, and the second alignment pin 4 is specially
1~3.
The embodiment of the present application also provides a kind of crawler belt comprising slotting riveting formula caterpillar belt structure as above equally has with above-mentioned
Beneficial effect.
It illustrates in more detail, the embodiment of the present application further relates to a kind of slotting riveting formula caterpillar belt structure, equally has above-mentioned beneficial
Effect.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be readily apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest scope of cause.
Claims (10)
1. a kind of slotting riveting formula caterpillar belt structure characterized by comprising
Crawler belt substrate and induction tooth；
The first slotting riveting auxiliary section on the crawler belt substrate；
On the induction tooth, and the second slotting riveting auxiliary section matched with the described first slotting riveting auxiliary section；
The first bearing pin mounting hole set on crawler belt substrate side；
The second bearing pin mounting hole set on the crawler belt substrate other side；
Third bearing pin mounting hole set on the induction tooth side；
The 4th bearing pin mounting hole set on the induction tooth other side；
It is arranged in the first alignment pin of first bearing pin mounting hole, the third bearing pin mounting hole；It is arranged in described second
Second alignment pin of bearing pin mounting hole, the 4th bearing pin mounting hole.
2. slotting riveting formula caterpillar belt structure according to claim 1, which is characterized in that the first slotting riveting auxiliary section is specially to set
In the first slotting riveting slot on the crawler belt substrate；The second slotting riveting auxiliary section is specially the induction bottom of the tooth portion that is set to, and with
First slotting riveting column of the first slotting riveting slot cooperation.
3. slotting riveting formula caterpillar belt structure according to claim 1, which is characterized in that the first slotting riveting auxiliary section is specially to set
In the second slotting riveting column on the crawler belt substrate；The second slotting riveting auxiliary section is specially the induction bottom of the tooth portion that is set to, and with
Second slotting riveting slot of the second slotting riveting column cooperation.
4. slotting riveting formula caterpillar belt structure according to claim 1, which is characterized in that the first slotting riveting auxiliary section includes: to set
In the first slotting riveting slot and the second slotting riveting column on the crawler belt substrate；
The second slotting riveting auxiliary section includes: to insert set on the induction bottom of the tooth portion, and with the first of the described first slotting riveting slot cooperation
Riveting column；And it is set to the induction bottom of the tooth portion, and the second slotting riveting slot with the described second slotting riveting column cooperation.
5. slotting riveting formula caterpillar belt structure according to claim 4, which is characterized in that the first slotting riveting column and described second is inserted
Riveting column is cube or cylindrical body.
6. slotting riveting formula caterpillar belt structure according to claim 4, which is characterized in that the first slotting riveting column is cube, institute
Stating the second slotting riveting column is cylindrical body；Or the first slotting riveting column is cylindrical body, the second slotting riveting column is cube.
7. according to claim 1 to slotting riveting formula caterpillar belt structure described in 6 any one, which is characterized in that the induction tooth includes:
Tooth ontology；Set on tooth ontology side, and it is equipped with the first installation extension of the third bearing pin mounting hole；Set on the tooth
The ontology other side, and it is equipped with the second installation extension of the 4th bearing pin mounting hole；The tooth ontology, first installation are prolonged
Extending portion, the second installation extension are integrally formed.
8. slotting riveting formula caterpillar belt structure according to claim 7, which is characterized in that the slotting riveting formula caterpillar belt structure further include:
Positive stop end card set on first alignment pin and second alignment pin both ends.
9. slotting riveting formula caterpillar belt structure according to claim 1, which is characterized in that first alignment pin is specially 1~3
A, second alignment pin is specially 1~3.
10. a kind of crawler belt characterized by comprising slotting riveting formula caterpillar belt structure described in claim 1 to 9 any one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910053785.1A CN109533061A (en) | 2019-01-21 | 2019-01-21 | A kind of slotting riveting formula caterpillar belt structure and crawler belt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910053785.1A CN109533061A (en) | 2019-01-21 | 2019-01-21 | A kind of slotting riveting formula caterpillar belt structure and crawler belt |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109533061A true CN109533061A (en) | 2019-03-29 |
Family
ID=65838084
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910053785.1A Pending CN109533061A (en) | 2019-01-21 | 2019-01-21 | A kind of slotting riveting formula caterpillar belt structure and crawler belt |
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| Country | Link |
|---|---|
| CN (1) | CN109533061A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113247129A (en) * | 2021-06-28 | 2021-08-13 | 北京林业大学 | Creeper tread suitable for vehicle running on sand |
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| US20120086265A1 (en) * | 2010-10-06 | 2012-04-12 | Gse Technologies, Llc | Roller bearing track bushing system |
| CN102530115A (en) * | 2012-01-17 | 2012-07-04 | 南京理工大学 | Anti-dropping crawler belt |
| CN106134359B (en) * | 2010-12-16 | 2014-02-26 | 内蒙古第一机械集团有限公司 | The two plate bodys of a kind of high speed crawler belt armored vehicle forge crawler belt |
| CN106134358B (en) * | 2010-11-11 | 2014-02-26 | 内蒙古第一机械集团有限公司 | A kind of forging veneer body crawler belt of heavy crawler belt armored vehicle |
| CN106005074A (en) * | 2016-05-27 | 2016-10-12 | 徐州徐工矿山机械有限公司 | Crawler belt of large mining excavator |
| CN107380282A (en) * | 2017-08-21 | 2017-11-24 | 江苏中天引控智能系统有限公司 | A kind of self-cleaning roller crawler belt |
| CN209351488U (en) * | 2019-01-21 | 2019-09-06 | 湖南千智机器人科技发展有限公司 | A kind of slotting riveting formula caterpillar belt structure and crawler belt |
-
2019
- 2019-01-21 CN CN201910053785.1A patent/CN109533061A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3993367A (en) * | 1975-07-07 | 1976-11-23 | Panatrac Manufacturing Corporation Limited | Guiding element for a vehicle track |
| US20050067897A1 (en) * | 2002-05-17 | 2005-03-31 | Rohan James | Vehicle track chain and link therefor |
| US20120086265A1 (en) * | 2010-10-06 | 2012-04-12 | Gse Technologies, Llc | Roller bearing track bushing system |
| CN106134358B (en) * | 2010-11-11 | 2014-02-26 | 内蒙古第一机械集团有限公司 | A kind of forging veneer body crawler belt of heavy crawler belt armored vehicle |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113247129A (en) * | 2021-06-28 | 2021-08-13 | 北京林业大学 | Creeper tread suitable for vehicle running on sand |
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