CN214570437U - Engineering machinery chassis track connects department link pin shaft installation frock - Google Patents
Engineering machinery chassis track connects department link pin shaft installation frock Download PDFInfo
- Publication number
- CN214570437U CN214570437U CN202120553288.0U CN202120553288U CN214570437U CN 214570437 U CN214570437 U CN 214570437U CN 202120553288 U CN202120553288 U CN 202120553288U CN 214570437 U CN214570437 U CN 214570437U
- Authority
- CN
- China
- Prior art keywords
- pushing
- main body
- plate
- body frame
- pin shaft
- 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.)
- Active
Links
Images
Abstract
The utility model discloses a link pin shaft installation tool at a crawler joint of an engineering machinery chassis, which comprises a tool main body frame, a pushing part, a back top part, a lifting cart and a controller part; the tool main body frame is arranged at the front part of the lifting trolley, and the height of the tool main body frame is adjusted through the lifting trolley; the pushing part and the back top part are respectively arranged on two sides of the tool main body frame and used for installing a pin shaft at a crawler joint; the controller part is arranged on the tool main body frame and used for controlling the working state of the pushing and pressing part. The utility model discloses not only can reduce workman intensity of labour, reduce the potential safety hazard, improve work efficiency, can effectively protect the round pin axle head face not destroyed moreover.
Description
Technical Field
The utility model relates to a round pin axle installation frock, concretely relates to engineering machine tool chassis track joint department link round pin axle installation frock.
Background
The crawler type travelling mechanism is widely applied to engineering mechanical equipment such as a rotary drilling rig, continuous wall equipment and the like, when the crawler type travelling mechanism is installed in a workshop, a crawler is generally firstly unfolded on the ground, a longitudinal beam is hoisted onto the unfolded crawler, and link plates at two ends of the crawler are fixed through pin shafts after the crawler bypasses a driving wheel, a guide wheel, a thrust wheel and the like on the longitudinal beam, so that the installation of a crawler assembly is realized. In order to ensure reliability and firmness, the pin shaft holes of the link plates at the two ends of the crawler belt and the pin shaft are arranged together in an interference fit mode. In order to realize interference fit installation, before installing the crawler belt pin shaft of equipment such as a rotary drilling rig, a continuous wall and the like, an engineering machinery equipment manufacturer generally puts the pin shaft to be installed into liquid nitrogen for cooling, so that the diameter of the pin shaft is reduced under the principle of thermal expansion and cold contraction, and then manually uses an impact bar to impact the end part of the pin shaft to install the pin shaft in the pin shaft holes of the two link plates. Even so, often need several people to cooperate and carry out impact type installation, manual impact installation has intensity of labour big, easily causes the damage to the pin shaft terminal surface, has certain potential safety hazard moreover, has always been a big problem of the installation of many engineering machine tool manufacturers' track assembly.
Disclosure of Invention
The utility model provides an engineering machine tool track connects link round pin axle installation frock of department not only can reduce workman intensity of labour, reduces the potential safety hazard, improves work efficiency, can effectively protect the round pin axle head face not destroyed moreover.
The utility model discloses realize according to following technical scheme:
the mounting tool for the link pin shaft at the crawler joint of the engineering machinery chassis comprises a tool main body frame, a pushing part, a back top part, a lifting trolley and a controller part; the tool main body frame is arranged at the front part of the lifting trolley, and the height of the tool main body frame is adjusted through the lifting trolley; the pushing part and the back top part are respectively arranged on two sides of the tool main body frame and used for installing a pin shaft at a crawler joint; the controller part is arranged on the tool main body frame and used for controlling the working state of the pushing and pressing part.
Further, the tool main body frame comprises a table-board connecting plate and a C-shaped frame plate integrated with the table-board connecting plate; the table-board connecting plate is positioned on the outer extending side of the bottom of the long-edge plate of the C-shaped frame plate and is arranged on a workbench of the lifting trolley; one end plate of the two short side plates of the C-shaped frame plate is provided with a mounting hole I for mounting a pushing part, and the other end plate is provided with a threaded hole for mounting a back top part.
Further, a sliding groove type mounting hole is formed in the table board connecting plate, after a bolt penetrates through the sliding groove type mounting hole and a mounting hole III in the workbench, the tool main body frame is connected with the workbench after the position of the tool main body frame is adjusted and then the bolt is screwed in through a nut, and the sliding groove type mounting hole structure is convenient for adjusting the position of the tool main body frame relative to the table board according to the actual product model specification and the mounting space.
Further, the pushing part comprises a cylinder bottom plate, a cylinder body, a pushing rod and a pushing top plate; the barrel bottom plate and the barrel body are fixed into a whole; the pushing rod moves axially along the barrel under the action of external force, one end of the pushing rod is positioned in the barrel, the other end of the pushing rod is provided with a pushing top plate, and the pushing plate is used for pushing one end of a pin shaft to be installed; and the barrel bottom plate is provided with a mounting hole II, and the pushing part and the mounting hole I on the tool mounting main body frame are arranged on the tool mounting main body frame in a bolt connection mode.
Further, the back top part comprises a back top baffle, a back top rod and a handle; the back ejector baffle is connected to one end of a back ejector rod, and the other end of the back ejector rod is connected with a handle; the back ejector rod is rotatably connected to the short side plate of the C-shaped frame plate of the tool main body frame, and the back ejector baffle plate can be adjusted through rotating the handle to be equivalent to the relative position of the short side plate of the C-shaped frame plate so as to meet the installation requirements of crawler belt pin shafts of different specified models.
Furthermore, the back top baffle is provided with a blind hole towards the direction of the pin shaft seat hole to be installed, the blind hole structure is designed on the back top baffle, so that the back top baffle can block the link plate with the pin shaft hole, the back top effect is realized when the pin shaft is installed conveniently, and a space is provided for exposing the pin shaft hole plate seat at the end of the installed pin shaft by a certain distance.
Further, the back ejector rod consists of a smooth rod part, a spiral lead screw part and a handle connecting part which are integrated from left to right; the smooth rod part and the back top baffle are installed into a whole, the screw rod part and the threaded hole in the main body frame form a screw rod pair, and the handle connecting part penetrates through the threaded hole in the main body frame and then is provided with a handle.
Further, the lifting trolley comprises a workbench, an X-shaped lifting frame and a bottom plate frame; the front end of the workbench is provided with a mounting hole III for mounting a tool main body frame; the upper end of the X-shaped lifting frame is arranged on a sliding groove of the workbench, the lower end of the X-shaped lifting frame is arranged on a sliding groove of the bottom plate frame, and the height adjustment and fixation of the lifting trolley can be realized.
Further, the lifting cart also comprises a bottom plate, an armrest and universal wheels; a bottom plate is welded at the left part of the bottom plate frame, and a handrail is welded on the bottom plate; universal wheels are installed below the bottom plate frame and the bottom plate, and the universal wheels are provided with brake brakes.
Further, the controller portion employs a foot controller mounted on the bottom plate for controlling the pushing rod of the pushing portion and the pushing operation of the pushing top plate.
The utility model discloses beneficial effect:
the utility model discloses not only can reduce workman intensity of labour, reduce the potential safety hazard, improve work efficiency, can effectively protect the round pin axle head face not destroyed moreover.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention, are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. It is obvious that the drawings in the following description are only some embodiments, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.
In the drawings:
fig. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic structural view of a tool body frame;
FIG. 3 is a schematic view of the pressing portion;
FIG. 4 is a schematic view of a back top portion configuration;
fig. 5 is a schematic view of the lift truck structure.
In the figure: 1. the tool comprises a tool main body frame, 1.1 parts, a table board connecting plate, 1.11 parts, chute-type mounting holes, 1.2 parts, a C-shaped frame plate, 1.21 parts, namely mounting holes I, 1.22 parts, threaded holes, 2 parts, a pushing part, 2.1 parts, a barrel bottom plate, 2.11 parts, mounting holes II, 2.2 parts, a barrel body, 2.3 parts, a pushing rod, 2.4 parts, a pushing top plate, 3 parts, a back top part, 3.1 parts, a back top baffle, 3.11 parts, blind holes, 3.2 parts, a back top rod, 3.21 parts, a polished rod part, 3.22 parts, a screw rod part, 3.23 parts, a handle connecting part, 3.3 parts, a handle, 4 parts, a lifting trolley, 4.1 parts, a workbench, 4.11 parts, a side baffle, 4.12 parts, mounting holes III, 4.2 parts, an X-shaped lifting frame, 4.3 parts, a bottom plate frame, 4.4.4.4, universal wheels, 4.5 parts, a bottom plate, 4.6 parts, handrails, 5 parts and a pedal controller.
It should be noted that the drawings and the description are not intended to limit the scope of the inventive concept in any way, but to illustrate the inventive concept by those skilled in the art with reference to specific embodiments.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings in the embodiments of the present invention are combined below to clearly and completely describe the technical solutions in the embodiments, and the following embodiments are used for illustrating the present invention, but do not limit the scope of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in FIG. 1, the tooling for installing the pin shaft of the link at the crawler joint of the chassis of the engineering machinery comprises a tooling main body frame 1, a pushing part 2, a back top part 3, a lifting trolley 4 and a foot controller 5.
The tool main body frame 1 is arranged at the front part of the lifting trolley 4, and the height of the tool main body frame 1 is adjusted through the lifting trolley 4; the pushing part 2 and the back top part 3 are respectively arranged at two sides of the tool main body frame 1 and used for installing pin shafts at the joints of the crawler belts; the foot controller 5 is installed on the tool main body frame 1 to control the working state of the pressing portion 2.
A preferred embodiment of the above embodiments with respect to the tool body frame is given below:
as shown in fig. 2, the tool main body frame 1 includes a table-board connecting plate 1.1 and a C-shaped frame plate 1.2 integrated therewith, the table-board connecting plate 1.1 is located at the outer extending side of the bottom of the long side plate of the C-shaped frame plate 1.2, a chute-type mounting hole 1.11 is provided on the table-board connecting plate 1.1 for mounting the tool main body frame 1 on a workbench 4.1 of a lifting cart 4, the chute-type mounting hole structure is convenient for adjusting the position of the tool main body frame relative to the table-board according to the actual product model specification and the mounting space, one end plate of the two short side plates of the C-shaped frame plate 1.2 is provided with a mounting hole i 1.21 for mounting the pushing part 2, and the other end plate is provided with a threaded hole 1.22 for mounting the back part 2.
A preferred embodiment of the above embodiment with respect to the pushing portion is given below:
as shown in fig. 3, the pushing and pressing part 2 includes a bottom plate 2.1, a barrel 2.2, a pushing and pressing rod 2.3, a pushing and pressing top plate 2.4 and the like, the bottom plate 2.1 and the barrel 2.2 are fixed into a whole, the pushing and pressing rod 2.3 axially moves along the barrel 2.2 under the action of hydraulic pressure, pneumatic pressure or electric power, one end of the pushing and pressing rod 2.3 is located in the barrel 2.2, the pushing and pressing top plate 2.4 is installed at the other end of the pushing and pressing rod, the pushing and pressing plate 2.4 is used for pushing and pressing one end of a pin shaft to be installed, a mounting hole ii 2.11 is formed in the bottom plate 2.1, and the pushing and pressing part is installed on the tool main body frame through a bolt connection mode with a mounting hole i 1.21 in the tool main body frame.
A preferred embodiment of the above embodiment with respect to the back top portion is given below:
as shown in fig. 4, the back top part 3 comprises a back top baffle 3.1, a back top rod 3.2, a handle 3.3 and the like, the back top baffle 3.1 and the back top rod 3.2 are installed into a whole, the back top rod 3.2 consists of three sections of a smooth rod part 3.21, a spiral screw rod part 3.22 and a handle connecting part 3.23 which are integrated from left to right, the spiral screw rod part 3.22 of the back top rod 3.2 and a threaded hole 1.22 on a main body frame form a spiral screw rod pair, the handle connecting part 3.23 of the back top rod 3.2 penetrates through the threaded hole 1.22 on the main body frame and is provided with the handle 3.3, the back top baffle 3.1 can be adjusted by rotating the handle 3.3 to be equivalent to the relative position of a short side plate of a C-shaped frame plate 1.2 so as to meet the installation of crawler belt pin shafts of different specified models, the back top baffle 3.1 is provided with a blind hole 3.11 towards the pin seat to be installed, the back top baffle 3.1 is designed with a blind hole structure which can realize the back top baffle 3.1 with a pin shaft hole to block the pin shaft hole when the pin shaft hole to be installed, but also provides space for the end of the installed pin shaft to expose out of the pin shaft hole plate seat for a certain distance.
A preferred embodiment of the above embodiment with respect to the lifting trolley is given below:
as shown in fig. 5, the lifting cart 4 includes a worktable 4.1, an X-shaped lifting frame 4.2, a bottom plate frame 4.3, universal wheels 4.4, a bottom plate 4.5, handrails 4.6, and the like. Two sides of the workbench 4.1 are provided with side baffles 4.11, mounting holes III 4.12 are arranged near the other two sides, the side baffles 4.11 can prevent common tools placed on the workbench from falling off, the mounting holes III 4.12 are used for mounting the tool main body frame 1, and the back of the workbench 4.1 is provided with a sliding chute convenient for the X-shaped lifting frame 4.2 to slide; the workbench 4.1 is arranged above the X-shaped lifting frame 4.2, and the lower part of the X-shaped lifting frame is arranged on the bottom plate frame 4.3, so that the height adjustment and fixation of the lifting cart 4 can be realized, and the X-shaped lifting frame is suitable for different product models and specifications and field conditions; the bottom plate frame 4.3 is formed by welding angle steel, a chute which is convenient for the X-shaped lifting frame 4.2 to slide is also arranged on the bottom plate frame 4.3, a bottom plate 4.5 is welded at the left part of the bottom plate frame 4.3, and a handrail 4.6 is welded on the bottom plate 4.5; a foot controller 5 is arranged on the bottom plate 4.5 and is used for controlling the pushing and pressing work of the pushing and pressing rod 2.3 and the pushing and pressing top plate 2.4 of the pushing and pressing part 2; universal wheels 4.4 are arranged below the bottom plate frame 4.3 and the bottom plate 4.5, and the universal wheels 4.4 are provided with brake brakes.
The utility model discloses application method and theory of operation: when the pin shaft at the crawler joint of the crawler traveling device of the engineering machinery such as a rotary drilling rig or a continuous wall and the like is required to be installed, the utility model is pushed to the installation position, the pushing part and the back top part are respectively arranged at two sides of the pin hole position of the crawler link plate, the height of the tool is adjusted according to the actual situation on site, the conical end of the pin shaft required to be installed is arranged in the pin hole at the side of the pushing part, the pushing top plate is used for pushing the other end of the pin shaft, the back top baffle plate 3.1 is used for pushing the link plate with the pin hole under the action of the screw pair through the rotating handle 3.3 according to different specifications of products, the pushing rod 2.3 of the pushing part 2 is controlled by the foot controller 5 to extend out, so as to drive the pushing top plate 2.4 to push the pin shaft in the pin hole, when the crawler traveling device is installed at the specified depth, the pushing is stopped and the foot controller is reversely trodden, and the pushing rod 2.3 is retracted, and finishing the installation of the pin shaft.
To sum up, the utility model provides an engineering machine tool track connects link round pin axle installation frock of department not only can reduce workman intensity of labour, reduces the potential safety hazard, improves work efficiency, can effectively protect the round pin axle head face not destroyed moreover.
In the description provided herein, numerous specific details are set forth. It is understood, however, that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.
Furthermore, those skilled in the art will appreciate that although some embodiments described herein include some features included in other embodiments instead of others, combinations of features of different embodiments are also meant to be within the scope of the invention and form different embodiments. For example, in the above embodiments, those skilled in the art can use the combination according to the known technical solutions and technical problems to be solved by the present application.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and although the present invention has been disclosed with reference to the above preferred embodiment, but not to limit the present invention, any person skilled in the art can make modifications or changes to equivalent embodiments by utilizing the above technical contents without departing from the scope of the present invention, and any simple modification, equivalent change and modification made to the above embodiments by the technical matters of the present invention are within the scope of the present invention.
Claims (10)
1. Engineering machine tool chassis track connects link round pin axle installation frock of department, its characterized in that:
the tool comprises a tool main body frame, a pushing part, a back top part, a lifting trolley and a controller part;
the tool main body frame is arranged at the front part of the lifting trolley, and the height of the tool main body frame is adjusted through the lifting trolley;
the pushing part and the back top part are respectively arranged on two sides of the tool main body frame and used for installing a pin shaft at a crawler joint;
the controller part is arranged on the tool main body frame and used for controlling the working state of the pushing and pressing part.
2. The engineering machinery chassis track joint link pin shaft mounting tool of claim 1, characterized in that:
the tool main body frame comprises a table top connecting plate and a C-shaped frame plate integrated with the table top connecting plate;
the table-board connecting plate is positioned on the outer extending side of the bottom of the long-edge plate of the C-shaped frame plate and is arranged on a workbench of the lifting trolley;
one end plate of the two short side plates of the C-shaped frame plate is provided with a mounting hole I for mounting a pushing part, and the other end plate is provided with a threaded hole for mounting a back top part.
3. The engineering machinery chassis track joint link pin shaft mounting tool of claim 2, characterized in that:
and after the position of the tool main body frame is adjusted, the tool main body frame is connected with the workbench together by screwing the bolt in through the nut.
4. The engineering machinery chassis track joint link pin shaft mounting tool of claim 1, characterized in that:
the pushing part comprises a cylinder bottom plate, a cylinder body, a pushing rod and a pushing top plate;
the barrel bottom plate and the barrel body are fixed into a whole;
the pushing rod moves axially along the barrel under the action of external force, one end of the pushing rod is positioned in the barrel, the other end of the pushing rod is provided with a pushing top plate, and the pushing plate is used for pushing one end of a pin shaft to be installed;
and the barrel bottom plate is provided with a mounting hole II, and the pushing part and the mounting hole I on the tool mounting main body frame are arranged on the tool mounting main body frame in a bolt connection mode.
5. The engineering machinery chassis track joint link pin shaft mounting tool of claim 1, characterized in that:
the back top part comprises a back top baffle, a back top rod and a handle;
the back ejector baffle is connected to one end of a back ejector rod, and the other end of the back ejector rod is connected with a handle;
the back ejector rod is rotatably connected to the short side plate of the C-shaped frame plate of the tool main body frame, and the back ejector baffle plate can be adjusted through rotating the handle to be equivalent to the relative position of the short side plate of the C-shaped frame plate so as to meet the installation requirements of crawler belt pin shafts of different specified models.
6. The engineering machinery chassis track joint link pin shaft mounting tool of claim 5, characterized in that:
the back top baffle is provided with a blind hole towards the direction of the pin shaft seat hole to be installed.
7. The engineering machinery chassis track joint link pin shaft mounting tool of claim 5, characterized in that:
the back ejector rod consists of a smooth rod part, a spiral lead screw part and a handle connecting part which are integrated from left to right;
the smooth rod part and the back top baffle are installed into a whole, the screw rod part and the threaded hole in the main body frame form a screw rod pair, and the handle connecting part penetrates through the threaded hole in the main body frame and then is provided with a handle.
8. The engineering machinery chassis track joint link pin shaft mounting tool of claim 1, characterized in that:
the lifting trolley comprises a workbench, an X-shaped lifting frame and a bottom plate frame;
the front end of the workbench is provided with a mounting hole III for mounting a tool main body frame;
the upper end of the X-shaped lifting frame is arranged on a sliding groove of the workbench, the lower end of the X-shaped lifting frame is arranged on a sliding groove of the bottom plate frame, and the height adjustment and fixation of the lifting trolley can be realized.
9. The engineering machinery chassis track joint link pin shaft mounting tool of claim 8, characterized in that:
the lifting cart further comprises a bottom plate, an armrest and universal wheels;
a bottom plate is welded at the left part of the bottom plate frame, and a handrail is welded on the bottom plate;
universal wheels are arranged below the bottom plate frame and the bottom plate.
10. The engineering machinery chassis track joint link pin shaft mounting tool of claim 9, characterized in that:
the controller portion employs a foot controller mounted on the bottom plate for controlling the pushing rod of the pushing portion and the pushing operation of the pushing top plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120553288.0U CN214570437U (en) | 2021-03-18 | 2021-03-18 | Engineering machinery chassis track connects department link pin shaft installation frock |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120553288.0U CN214570437U (en) | 2021-03-18 | 2021-03-18 | Engineering machinery chassis track connects department link pin shaft installation frock |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214570437U true CN214570437U (en) | 2021-11-02 |
Family
ID=78354570
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120553288.0U Active CN214570437U (en) | 2021-03-18 | 2021-03-18 | Engineering machinery chassis track connects department link pin shaft installation frock |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214570437U (en) |
-
2021
- 2021-03-18 CN CN202120553288.0U patent/CN214570437U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109352258B (en) | Overturning welding tool for semitrailer chassis | |
| CA1125386A (en) | Mobile rail welding machine | |
| CN214570437U (en) | Engineering machinery chassis track connects department link pin shaft installation frock | |
| CN111408929A (en) | Bolt fastening vehicle | |
| CN202278138U (en) | Hydraulic multi-functional rail forging manipulator with nippling-lever telescoping function | |
| CN201343386Y (en) | Workpiece-moving device | |
| CN214393105U (en) | Installation tool for end pin shaft of cylinder barrel of oil cylinder extending leftwards and rightwards of crawler-type chassis | |
| CN210850068U (en) | Balanced elbow installation device | |
| KR101039672B1 (en) | Trolley for dismantling ELV | |
| CN215548501U (en) | Assembly tool car of wheeled excavator lower vehicle tool case | |
| CN110581454B (en) | Switch cabinet instrument box wiring tool vehicle | |
| CN112388303B (en) | Assembling device and assembling method for coupler buffer device | |
| CN212600084U (en) | Fork pipe pressure riveting integrated equipment | |
| CN106391881A (en) | Quick hoisting type mold changing trolley and mold changing method thereof | |
| CN210587238U (en) | Positioning auxiliary device for processing non-ferrous metal parts | |
| CN207449192U (en) | A kind of movable pressing machine | |
| CN113979364B (en) | Crawler belt mounting trolley and crawler belt mounting method | |
| CN212609261U (en) | Many occasions use auto repair hoisting device | |
| CN218021747U (en) | PC rod iron base material automatic feeding device | |
| JP6139738B1 (en) | Work truck for attaching and detaching connecting devices for railway vehicles | |
| CN217317926U (en) | Over-and-under type electric power overhauls frock | |
| CN219984927U (en) | Ferrosilicon breaker | |
| JP3850138B2 (en) | Steel pipe pile joint connection method | |
| CN217752162U (en) | Self-propelled beam body chiseling machine | |
| CN220482983U (en) | Multi-degree-of-freedom tire changing vehicle |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |