CN215663708U - Track tensioning device and track-laying vehicle - Google Patents
Track tensioning device and track-laying vehicle Download PDFInfo
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- CN215663708U CN215663708U CN202121394289.1U CN202121394289U CN215663708U CN 215663708 U CN215663708 U CN 215663708U CN 202121394289 U CN202121394289 U CN 202121394289U CN 215663708 U CN215663708 U CN 215663708U
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Abstract
The utility model relates to the technical field of engineering machinery, in particular to a track tensioning device and a tracked vehicle, wherein the track tensioning device comprises: the cylinder body is provided with a first connecting part on the outer side; the first end of the piston rod is arranged in the cylinder body, the second end of the piston rod is positioned outside the cylinder body and is suitable for being connected with the chassis fixing seat, the second end of the piston rod is provided with an oil filling valve, an oil way is arranged in the piston rod, the first end of the oil way is communicated with the oil filling valve, and the second end of the oil way extends to the end face of the first end of the piston rod; the support is suitable for being connected with the guide wheel, and a second connecting part is arranged on the outer side of the support; the first disc-shaped spring is arranged between the first connecting part and the second connecting part. The rigidity of the first disc-shaped spring is high, the load capable of being borne is high, the size of the first disc-shaped spring required by buffering large walking impact force is small, and therefore the size of the track tensioning device can be reduced, and abrasion of the first disc-shaped spring and the supporting wheel is avoided.
Description
Technical Field
The utility model relates to the technical field of engineering machinery, in particular to a track tensioning device and a tracked vehicle.
Background
The crawler-type vehicle is widely applied to the fields of engineering machinery, mining machinery, construction machinery and the like, and a crawler is one of main walking parts of the vehicle. In order to meet the walking requirements of different road conditions, the track tensioning mechanism plays a very critical role, the track tensioning device can enable the track to be tensioned all the time and be in a good working state, and meanwhile, the track tensioning device can ensure that the track cannot break or derail and other faults due to impact in the walking process of the vehicle.
The track tensioning device in the prior art mostly adopts a cylindrical helical spring as a buffer element, and after the track type chassis is impacted in the walking process, the impact force is buffered by compressing the cylindrical helical spring, so that structures such as guide wheels and chassis are protected. And cylindrical coil spring structural rigidity is general, when engineering machinery such as large-scale excavator need cushion great walking impact force, need adopt the cylindrical coil spring of great volume, consequently needs the chassis to provide great installation space, can lead to overspeed device tensioner's cylindrical coil spring and thrust wheel clearance undersize like this, can make cylindrical coil spring and thrust wheel interfere, causes the spring wearing and tearing, reduces the life of spring.
SUMMERY OF THE UTILITY MODEL
Therefore, the technical problem to be solved by the utility model is to overcome the defect that a spring is easy to wear due to the large size of a track tensioning device when large walking impact force needs to be buffered in the prior art, so that the track tensioning device and the tracked vehicle can reduce the size of the track tensioning device and avoid the wear of the spring.
In order to solve the above technical problem, the present invention provides a track tensioner, comprising:
the cylinder body is provided with a first connecting part on the outer side;
the first end of the piston rod is arranged in the cylinder body, the second end of the piston rod is positioned outside the cylinder body and is suitable for being connected with the chassis fixing seat, the second end of the piston rod is provided with an oil filling valve, an oil way is arranged in the piston rod, the first end of the oil way is communicated with the oil filling valve, and the second end of the oil way extends to the end face of the first end of the piston rod;
the support is suitable for being connected with the guide wheel, and a second connecting part is arranged on the outer side of the support;
a first disc spring disposed between the first connection portion and the second connection portion.
Optionally, a mounting through hole is formed in the support, the track tensioning device further comprises a straight rod, a first end of the straight rod is fixedly connected with the cylinder body, and a second end of the straight rod penetrates through the mounting through hole.
Optionally, the track tensioning device further comprises a locking member fixedly connected to the second end of the straight rod for blocking the support from moving towards a side away from the cylinder.
Optionally, an elastic member is arranged between the locking member and the support.
Optionally, the elastic member is a second disc spring.
Optionally, the retaining member is a nut.
Optionally, a nut anti-loosening structure is further arranged at the second end of the straight rod, and the nut anti-loosening structure is fixedly connected with the straight rod and used for preventing the nut from loosening.
Optionally, the first end of the straight rod is connected with the cylinder body through threads;
and/or the track tensioning device further comprises a cylindrical structure, an inner cylinder wall of the cylindrical structure surrounds the outer side of the first disc spring, and at least one of the bracket and the cylinder is slidably matched with the cylindrical structure;
and/or a spacer bush is arranged on one side, facing the cylinder body, of the support.
Optionally, the first end of the straight rod is connected with the cylinder body through a fixing pin.
The utility model also provides a tracked vehicle comprising the track tensioning device.
The technical scheme of the utility model has the following advantages:
1. according to the track tensioning device provided by the utility model, the first disc-shaped spring is arranged between the support and the cylinder body, the rigidity of the first disc-shaped spring is higher, the load which can be borne is larger, and the volume of the first disc-shaped spring required for buffering larger walking impact force is smaller, so that the volume of the track tensioning device can be reduced, the abrasion of the first disc-shaped spring and the supporting wheel is avoided, and the service life of the track tensioning device is prolonged.
2. According to the track tensioning device provided by the utility model, the elastic piece is arranged between the locking piece and the support. In this embodiment, the chassis walking in-process, when the impact force that the guide wheel received exceeded first belleville spring's pretightning force, the guide wheel drives the support and removes, first belleville spring is compressed, play the effect of buffering, retaining member and support separation this moment, after the impact force on the guide wheel was eliminated, under the elastic force effect of first belleville spring, the support resets, through set up the elastic component between retaining member and support, can prevent that the support from taking place rigid collision at the in-process that resets with the retaining member, avoid the position that the straight-bar links to each other with the retaining member to take place fatigue fracture because of producing stress concentration.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a sectional view of a track tensioner provided in embodiment 1 of the present invention.
Description of reference numerals:
1. a piston rod; 2. an oil filling valve; 3. a cylinder body; 4. a first disc spring; 5. a cylindrical structure; 6. a fixing pin; 7. a straight rod; 8. a spacer sleeve; 9. a support; 10. a second disc spring; 11. a clamp spring; 12. a nut; 13. a nut anti-loosening plate; 14. and (4) bolts.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Example 1
The track tensioning device in the prior art mostly adopts a cylindrical helical spring as a buffer element, and the crawler-type chassis is impacted after being impacted in the walking process, so that the structures such as guide wheels, chassis and the like are protected by compressing the cylindrical helical spring to buffer the impact force. And cylindrical coil spring structural rigidity is general, when engineering machinery such as large-scale excavator need cushion great walking impact force, need adopt the cylindrical coil spring of great volume, consequently needs the chassis to provide great installation space, can lead to overspeed device tensioner's cylindrical coil spring and thrust wheel clearance undersize like this, can make cylindrical coil spring and thrust wheel interfere, causes the spring wearing and tearing, reduces the life of spring.
For this reason, the present embodiment provides a track-tightening device which can reduce the volume as compared with the prior art track-tightening device when it is necessary to buffer a large walking impact force, so that the wear of the spring can be avoided.
In one embodiment, as shown in fig. 1, the track-tightening device includes a cylinder 3, a piston rod 1, a bearing 9, and a first belleville spring 4.
Wherein, the outer side of the cylinder body 3 is provided with a first connecting part; the first end of the piston rod 1 is arranged in the cylinder body 3, the second end of the piston rod 1 is positioned outside the cylinder body 3 and is suitable for being connected with the chassis fixing seat, the second end of the piston rod 1 is provided with an oil filling valve 2, an oil way is arranged in the piston rod 1, the first end of the oil way is communicated with the oil filling valve 2, and the second end of the oil way extends to the end face of the first end of the piston rod 1; the support 9 is suitable for being connected with the guide wheel, and a second connecting part is arranged on the outer side of the support 9; the first disc spring 4 is arranged between the first and second connection portions.
In the embodiment, during operation, the second end of the piston rod 1 is connected with the chassis fixing seat, the support 9 is connected with the guide wheel, grease is injected through the oil injection valve 2, the grease enters a gap between the first end of the piston rod 1 and the cylinder body 3 through an oil path in the piston rod 1 to push the cylinder body 3 to move, and after the first disc-shaped spring 4 is compressed to a preset length, the cylinder body 3 drives the first disc-shaped spring 4 and the support 9 to move together, so that the distance between the support 9 and the piston rod 1 is increased, and the guide wheel is tensioned; in the chassis walking process, when the impact force that the guide wheel received exceeded first belleville spring 4's pretightning force, the guide wheel drove support 9 and removes, and first belleville spring 4 is compressed, plays the effect of buffering, and after the impact force on the guide wheel was eliminated, under the elastic force effect of first belleville spring 4, support 9 reset. Through set up first dish spring 4 between support 9 and cylinder body 3, first dish spring 4's rigidity is great, and the load that can bear is great, and the required volume of first dish spring 4 of the great walking impact force of buffering is less, consequently can make this track overspeed device tensioner's volume reduce, avoids first dish spring 4 and thrust wheel wearing and tearing, has prolonged track overspeed device tensioner's life.
It should be noted that, the first disc spring 4 is formed by overlapping a plurality of discs, and the disc spring structures in different combination forms can obtain different stiffness and deformation buffering effects, and those skilled in the art can select a suitable combination form according to the stress condition and the installation size requirement.
As shown in fig. 1, the cylinder 3 includes a main body section, and an annular boss disposed at an end of the main body section, wherein an outer diameter of the annular boss is larger than an outer diameter of the main body section, a first step surface is formed between the annular boss and the main body section, the first step surface constitutes a first connection portion, and the first disc spring 4 is sleeved outside the main body section and abuts against the first step surface. In other alternative embodiments, a first connecting member may be fixedly connected to the outer side of the cylinder 3, and the first connecting member may be a unitary annular structure or a plurality of structures uniformly distributed on the outer side of the cylinder 3 along the circumferential direction.
Referring further to fig. 1, the support 9 includes a first section, a second section, and a third section in sequence from the end close to the cylinder 3 to the end far from the cylinder 3, the outer diameter of the second section is larger than that of the first section, the outer diameter of the third section is larger than that of the second section, a second step surface is formed between the first section and the second section, the second step surface forms a second connection portion, and the first disc spring 4 is sleeved outside the first section and abuts against the second step surface. In other alternative embodiments, a second connecting member may be fixedly connected to the outer side of the support 9, and the second connecting member may be a unitary annular structure or a plurality of structures uniformly distributed on the outer side of the support 9 along the circumferential direction.
On the basis of the above embodiment, in a preferred embodiment, the inside of the support 9 is provided with a mounting through hole, the track tensioning device further comprises a straight rod 7, a first end of the straight rod 7 is fixedly connected with the cylinder 3, and a second end of the straight rod 7 penetrates through the mounting through hole. In the present embodiment, the provision of the straight bar 7 serves to guide the movement of the mount 9, and ensures the movement direction of the mount 9.
On the basis of the above embodiment, in a preferred embodiment, the track-tightening device further comprises a locking member fixedly attached to the second end of the straight rod 7 for blocking the movement of the support 9 toward the side away from the cylinder 3. In the embodiment, the locking member is fixedly connected to the second end of the straight rod 7, and at this time, the distance between the second connecting portion and the first connecting portion is a first preset size, and correspondingly, the first disc spring 4 is compressed to the first preset size required by the design, and the first disc spring 4 generates a preset pre-tightening force; when the hydraulic oil filling device works, the second end of the piston rod 1 is connected with the chassis fixing seat, the support 9 is fixedly connected with the guide wheel, oil is filled through the oil filling valve 2, the oil enters a gap between the first end of the piston rod 1 and the cylinder body 3 through an oil way in the piston rod 1, and the cylinder body 3 is pushed to drive the straight rod 7, the first disc-shaped spring 4 and the support 9 to move together, so that the guide wheel is tensioned; in the chassis walking in-process, when the impact force that the guide wheel received exceeded first belleville spring 4's pretightning force, the guide wheel drove support 9 and removes, and first belleville spring 4 is compressed, plays the effect of buffering, and retaining member and support 9 separation this moment, after the impact force elimination on the guide wheel, under the elastic force effect of first belleville spring 4, support 9 resets. Through set up first dish spring 4 between support 9 and cylinder body 3, first dish spring 4's rigidity is great, and the load that can bear is great, and the required volume of first dish spring 4 of the great walking impact force of buffering is less, consequently can make this track overspeed device tensioner's volume reduce, avoids first dish spring 4 and thrust wheel wearing and tearing, has prolonged track overspeed device tensioner's life.
On the basis of the above embodiments, in a preferred embodiment, an elastic member is provided between the locking member and the seat 9. In this embodiment, the chassis walking in-process, when the impact force that the guide wheel received exceeded first belleville spring 4's pretightning force, the guide wheel drives support 9 and removes, first belleville spring 4 is compressed, play the effect of buffering, retaining member and support 9 separation this moment, after the impact force on the guide wheel was eliminated, under the elastic force effect of first belleville spring 4, support 9 resets, through set up the elastic component between retaining member and support 9, can prevent that support 9 from taking place the rigidity collision at the in-process that resets with the retaining member, avoid the position that straight-bar 7 and retaining member link to each other to take place fatigue fracture because of producing stress concentration.
In a preferred embodiment, the elastic member is the second disc spring 10 in addition to the above-described embodiments. In this embodiment, the second belleville spring 10 is of a smaller volume and at the same time of greater rigidity, thanks to the smaller clearance between the retaining member and the seat 9, facilitating the mounting and fixing of the retaining member. In other alternative embodiments, the resilient member may be a resilient pad or a common spring.
As shown in fig. 1, a mounting cavity is formed in the support 9, the second end of the straight rod 7 is located in the mounting cavity, and the second disc spring 10 is sleeved on the straight rod 7 and fixed on the cavity wall of the mounting cavity through a clamp spring 11. In an alternative embodiment, the second belleville spring 10 may be secured to the straight rod 7 between the retaining member and the abutment 9 by means of an interference fit. In another alternative embodiment, the second belleville spring 10 is fitted over the straight rod 7 and is fixed to the locking member between the locking member and the seat 9.
In addition to the above embodiments, in a preferred embodiment, the retaining member is a nut 12. In this embodiment, the second end of the straight rod 7 is externally threaded, the nut 12 can be screwed on the second end of the straight rod 7, the nut 12 is screwed on the second end of the straight rod 7, so that the distance between the second connecting portion and the first connecting portion is a first preset size, and correspondingly, the first disc spring 4 is compressed to the first preset size required by the design, and the first disc spring 4 generates a predetermined pre-tightening force. In an alternative embodiment, the locking member is fixedly connected with the straight rod 7 by means of interference fit. In another alternative embodiment, the second end of the straight rod 7 is provided with a pin hole, and the locking member is a locking pin which can be inserted into the pin hole.
On the basis of the above embodiment, in a preferred embodiment, the second end of the straight rod 7 is further provided with a nut anti-loosening structure, and the nut anti-loosening structure is fixedly connected with the straight rod 7 and used for preventing the nut 12 from loosening. In this embodiment, the nut anti-loosening structure is arranged to prevent the nut 12 from loosening, and ensure that the first disc spring 4 has a predetermined pre-tightening force.
In one embodiment, the nut loosening prevention structure is a nut loosening prevention plate 13 shown in fig. 1, and the nut loosening prevention plate 13 includes a plate body fixed at the second end face of the straight rod 7, and an annular wall plate surrounding the outer side of the nut 12, and the plate body and the straight rod 7 are connected through a bolt 14. In an alternative embodiment, the nut 12 is provided with a through-hole, the straight bar 7 is provided with a through-hole at a position opposite to the through-hole, the nut anti-loosening structure comprises a pin, the nut 12 is screwed on the straight bar 7, the pin is inserted through the through-hole to fix the position of the nut 12, and the pin can be a cylindrical pin, a conical pin, a perforated pin, a cotter pin, a safety pin and the like.
On the basis of the above embodiments, in a preferred embodiment, the first end of the straight rod 7 is connected with the cylinder 3 by a screw thread. In this embodiment, the connection of the straight rod 7 to the cylinder 3 is simple and convenient. As shown in fig. 1, the cylinder body 3 is provided with a threaded hole, an external thread matched with the threaded hole is arranged outside the first end of the straight rod 7, and the straight rod 7 is fixedly connected with the cylinder body 3 by screwing the first end of the straight rod 7 into the threaded hole. In an alternative embodiment, the straight rod 7 and the cylinder 3 may be fixedly connected by welding.
On the basis of the above embodiments, in a preferred embodiment, the first end of the straight rod 7 and the cylinder 3 are further connected by the fixing pin 6. In this embodiment, the first end of the straight rod 7 is connected to the cylinder 3 by the screw and the fixing pin 6 at the same time, so that the first end of the straight rod 7 can be stably connected to the cylinder 3. As shown in fig. 1, a pin hole perpendicular to the threaded hole is formed in the cylinder body 3, a connecting hole corresponding to the pin hole is formed in the straight rod 7, and the fixing pin 6 can be inserted into the pin hole and the connecting hole to prevent the straight rod 7 from loosening in the cylinder body 3.
On the basis of the above embodiment, in a preferred embodiment, the track-tightening device further comprises a cylindrical structure 5, the inner cylindrical wall of the cylindrical structure 5 surrounding the outside of the first belleville spring 4, at least one of the seat 9 and the cylinder being slidably engaged with the cylindrical structure 5. In this embodiment, the cylindrical structure 5 is arranged to further guide the movement of the seat 9, while the first belleville spring 4 is positioned without affecting the relative movement of the seat 9 and the cylinder 3. In one embodiment, as shown in fig. 1, the inner cylindrical wall of the cylindrical structure 5 surrounds the outside of the first disc spring 4, the first end of the cylindrical structure 5 is fixedly connected with the support 9, and the second end of the cylindrical structure 5 is slidably arranged outside the cylinder 3. In an alternative embodiment, the inner cylindrical wall of the cylindrical structure 5 surrounds the outside of the first disc spring 4, the first end of the cylindrical structure 5 being slidably arranged outside the seat 9, and the second end of the cylindrical structure 5 being fixedly connected to the cylinder 3. In another alternative embodiment, the inner cylindrical wall of the cylindrical structure 5 surrounds the outside of the first disc spring 4, the first end of the cylindrical structure 5 being slidably arranged outside the seat 9 and the second end of the cylindrical structure 5 being slidably arranged outside the cylinder 3. In another alternative embodiment, the first end support 9 of the cylindrical structure 5 is fixedly connected and the second end of the cylindrical structure 5 is not connected to the cylinder 3 but is slidable with respect to the cylinder 3. In another alternative embodiment, the first end of the cylindrical structure 5 is not connected to the support 9, but is slidable with respect to the support 9, the second end of the cylindrical structure 5 being fixedly connected to the cylinder 3.
On the basis of the above embodiments, in a preferred embodiment, the side of the support 9 facing the cylinder 3 is provided with a spacer 8, and the straight rod 7 is inserted into the spacer 8. In this embodiment, the spacer 8 is provided to ensure that the maximum compression of the first disc spring 4 does not exceed the spacing between the spacer 8 and the cylinder 3.
Example 2
The present embodiment provides a tracked vehicle comprising the track tensioning device provided in the above embodiments, wherein the second end of the piston rod 1 is connected to the chassis fixing base and the bearing 9 is connected to the guide wheel.
The tracked vehicle in this embodiment may be specifically a crawler excavator, a crawler crane, or the like.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the utility model.
Claims (10)
1. A track tensioning device, comprising:
the cylinder body (3) is provided with a first connecting part on the outer side;
the first end of the piston rod (1) is arranged in the cylinder body (3), the second end of the piston rod (1) is located outside the cylinder body (3) and is suitable for being connected with a chassis fixing seat, an oil filling valve (2) is arranged at the second end of the piston rod (1), an oil way is arranged in the piston rod (1), the first end of the oil way is communicated with the oil filling valve (2), and the second end of the oil way extends to the end face of the first end of the piston rod (1);
the support (9) is suitable for being connected with the guide wheel, and a second connecting part is arranged on the outer side of the support (9);
a first disc spring (4) disposed between the first connection portion and the second connection portion.
2. The track tensioning device according to claim 1, characterized in that the support (9) has a mounting through hole formed therein, the track tensioning device further comprises a straight rod (7), a first end of the straight rod (7) is fixedly connected with the cylinder (3), and a second end of the straight rod (7) passes through the mounting through hole.
3. Track-tensioning device according to claim 2, characterized in that it further comprises a locking member fixedly connected at the second end of the straight bar (7) for blocking the movement of the support (9) towards the side remote from the cylinder (3).
4. Track-tightening device according to claim 3, characterized in that an elastic element is provided between the locking element and the support (9).
5. Track-tightening device according to claim 4, characterized in that the elastic element is a second belleville spring (10).
6. Track tensioning device according to one of claims 3 to 5, characterized in that the locking element is a nut (12).
7. Track tensioning device according to claim 6, characterized in that the second end of the straight rod (7) is also provided with a nut anti-loosening structure, which is fixedly connected to the straight rod (7) for preventing the nut (12) from loosening.
8. Track-tensioning device according to any one of claims 3 to 5, characterized in that the first end of the straight rod (7) is connected to the cylinder (3) by means of a screw thread;
and/or the track tensioning device further comprises a cylindrical structure (5), the inner cylindrical wall of the cylindrical structure (5) surrounds the outside of the first disc spring (4), at least one of the seat (9) and the cylinder (3) is slidably engaged with the cylindrical structure (5);
and/or a spacer sleeve (8) straight rod is arranged on one side, facing the cylinder body (3), of the support (9).
9. Track-tightening device according to claim 8, characterized in that the first end of the straight rod (7) is also connected to the cylinder (3) by means of a fixing pin (6).
10. A track vehicle comprising a track tensioning device as claimed in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121394289.1U CN215663708U (en) | 2021-06-22 | 2021-06-22 | Track tensioning device and track-laying vehicle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121394289.1U CN215663708U (en) | 2021-06-22 | 2021-06-22 | Track tensioning device and track-laying vehicle |
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| CN215663708U true CN215663708U (en) | 2022-01-28 |
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| CN202121394289.1U Active CN215663708U (en) | 2021-06-22 | 2021-06-22 | Track tensioning device and track-laying vehicle |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115056872A (en) * | 2022-07-28 | 2022-09-16 | 徐工集团工程机械股份有限公司道路机械分公司 | Crawler tensioning system, paver and method |
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2021
- 2021-06-22 CN CN202121394289.1U patent/CN215663708U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115056872A (en) * | 2022-07-28 | 2022-09-16 | 徐工集团工程机械股份有限公司道路机械分公司 | Crawler tensioning system, paver and method |
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| TR01 | Transfer of patent right |
Effective date of registration: 20221130 Address after: 401135 No. 618 Liangjiang Avenue, Longxing Town, Liangjiang New Area, Yubei District, Chongqing Patentee after: Sany Heavy Machinery (Chongqing) Co.,Ltd. Address before: 215300 Huancheng East Road, Kunshan Development Zone, Suzhou City, Jiangsu Province Patentee before: SANY HEAVY MACHINERY Ltd. |
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| TR01 | Transfer of patent right |