CN216178545U - Floating V-shaped machining tool for rear axle of mine car - Google Patents
Floating V-shaped machining tool for rear axle of mine car Download PDFInfo
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- CN216178545U CN216178545U CN202122400824.6U CN202122400824U CN216178545U CN 216178545 U CN216178545 U CN 216178545U CN 202122400824 U CN202122400824 U CN 202122400824U CN 216178545 U CN216178545 U CN 216178545U
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Abstract
The utility model relates to the field of mine car rear axle machining tools, in particular to a mine car rear axle floating V-shaped machining tool which comprises a bottom plate assembly, a first floating V-shaped supporting assembly, a second floating V-shaped supporting assembly, a first support assembly, a second support assembly, a rear supporting assembly, a pressing plate assembly and a positioning pin.
Description
Technical Field
The utility model relates to the field of mine car rear axle machining tools, in particular to a mine car rear axle floating V-shaped machining tool.
Background
The rear axle is a rear driving axle component for transmitting vehicle power, and is formed from two half-bridges, and can implement half-bridge differential motion. Meanwhile, the device is also used for supporting wheels and connecting rear wheels, and if the vehicle is driven by a front axle, the rear axle is just a follow-up axle and only plays a role in bearing. Because the rear axle casting structure of the large-scale mine car is complex and is easy to deform after tempering, in the market at present, for the rear axle steel castings of the large-scale mine car, some small and medium-sized enterprises still adopt line marking before machining when processing some blank castings, and the processing mode of line alignment is adopted for processing during machining, so that the labor capacity of workers is greatly increased, the production and machining efficiency of the rear axle steel castings is influenced, and the production and machining requirements of enterprises can not be met.
Disclosure of Invention
The utility model aims to provide a mine car rear axle floating V-shaped machining tool which is not limited by deformation of a rear axle steel casting blank after tempering in the specific installation and use process, is automatically positioned in a floating mode in the horizontal direction, is convenient to clamp and machine, greatly improves the production and machining efficiency of rear axle steel castings, and meets the production and machining requirements of enterprises.
In order to achieve the purpose, the utility model adopts the following technical scheme:
a floating V-shaped processing tool for a rear axle of a mine car comprises a bottom plate assembly, a first floating V-shaped supporting assembly, a second floating V-shaped supporting assembly, a first supporting assembly, a second supporting assembly, a rear supporting assembly, a pressing plate assembly and a positioning pin, wherein the bottom of the bottom plate assembly is installed on an external machine tool through a first fastening bolt, the first floating V-shaped supporting assembly and the second floating V-shaped supporting assembly are installed on the upper portion of the bottom plate assembly, the bottoms of the first floating V-shaped supporting assembly and the second floating V-shaped supporting assembly are fastened on the upper portion of the bottom plate assembly through a second fastening bolt, the first supporting assembly and the second supporting assembly are installed on the bottom plate assembly, the first supporting assembly and the second supporting assembly are fastened with the bottom plate assembly through a third fastening bolt, the rear supporting assembly is installed on the bottom plate assembly, the pressing plate assembly is installed on the upper portion of the bottom plate assembly and is connected with the bottom plate assembly, the positioning pin is arranged on the bottom plate assembly and connected with the bottom plate assembly.
The bottom plate closes the piece and includes, mounting plate, first mounting panel and second mounting panel, first mounting panel install the lower part left side position at mounting plate and with mounting plate fixed linking to each other, the second mounting panel install the lower part right side position at mounting plate and with mounting plate fixed linking to each other, it has the screw thread through-hole to process on first mounting panel and second mounting panel, the screw thread through-hole in install a fastening bolt.
The first floating V-shaped supporting assembly and the second floating V-shaped supporting assembly are the same in structure composition, the two comprises a left sliding block, a right sliding block, a spring mounting seat, a floating spring, a V-shaped support, a first sliding seat cover plate, a second sliding seat cover plate and a limiting bolt, the bottoms of the left sliding block and the right sliding block are mounted on the upper portion of a mounting base plate and are connected with the mounting base plate into a whole through a fastening bolt, the two sides of the first sliding seat cover plate are mounted on the left sliding block and the right sliding block and are connected with the left sliding block and the right sliding block, the two sides of the second sliding seat cover plate are mounted on the left sliding block and the right sliding block and are connected with the left sliding block and the right sliding block, a hollow cavity is formed between the left sliding block and the right sliding block, the spring mounting seat is mounted on the mounting base plate at the bottom of the hollow cavity, the floating spring plug bush is arranged outside the spring mounting seat and connected with the spring mounting seat, the bottom of the V-shaped support is arranged on the upper portion of the floating spring and connected with the floating spring, a through hole is processed at the top of the spring mounting seat, and the limiting bolt penetrates through the through hole and then is arranged at the bottom of the V-shaped support and connected with the bottom of the V-shaped support.
Furthermore, a threaded through hole is processed in the second sliding seat cover plate, a positioning bolt is installed in the threaded through hole, and the positioning bolt is connected with the threaded through hole processed in the second sliding seat cover plate in a threaded matching mode.
Furthermore, a support table is processed at the bottom of the outer side of the spring mounting seat, and the bottom of the floating spring is mounted on the support table and connected with the support table.
Furthermore, a gasket is arranged on the lower portion of the V-shaped support and connected with the lower portion of the V-shaped support.
First support close piece and second support close the piece the two and constitute for the same structure, its two includes, top mounting panel, left branch strut, right branch strut and bottom suspension strut, it has the screw thread through-hole to process in the four corners department of bottom suspension strut, installs fastening bolt in the screw thread through-hole, the bottom suspension strut pass through fastening bolt and install on mounting plate, the bottom of the two of left branch strut and right branch strut install on the bottom suspension strut and with the bottom suspension strut fixed linking to each other, the top mounting panel install on left branch strut and right branch strut and with the two fixed linking to each other of left branch strut and right branch strut.
The back support closes the piece and includes, back supporting baseplate, left branch fagging, right branch fagging, first clamp bolt and second clamp bolt, back supporting baseplate install on mounting plate and link to each other with mounting plate through connecting bolt, the bottom of left branch fagging, right branch fagging install on back supporting baseplate and with back supporting baseplate welding together, first clamp bolt install on the left branch fagging and link to each other with left branch fagging screw-thread fit, the second clamp bolt install on the right branch fagging and link to each other with right branch fagging screw-thread fit.
The utility model has the beneficial effects that: the utility model has scientific integral structure design and simple and convenient installation, operation and use, and can realize automatic floating positioning of the rear axle steel casting blank in the horizontal direction without being limited by deformation of the rear axle steel casting blank after tempering through the joint installation and cooperation of the components such as the bottom plate assembly, the first floating V-shaped supporting assembly, the second floating V-shaped supporting assembly, the first support assembly, the second support assembly, the rear supporting assembly, the pressing plate assembly and the like.
Drawings
FIG. 1 is a schematic overall front view of the present invention;
FIG. 2 is a schematic view of the overall top view of the present invention;
FIG. 3 is a schematic side view of the present invention;
FIG. 4 is a schematic structural view of the bottom plate assembly of the present invention;
FIG. 5 is a schematic front view of both the first floating V-shaped support member and the second floating V-shaped support member in the present invention;
FIG. 6 is a side view schematic of both the first floating V-shaped support member and the second floating V-shaped support member of the present invention;
FIG. 7 is a schematic view of the structure of both the first and second stand-off assemblies of the present invention;
FIG. 8 is a schematic view of the construction of the rear support assembly of the present invention;
the reference numbers in the figures are: 1-bottom plate assembly, 2-first floating V-shaped supporting assembly, 3-second floating V-shaped supporting assembly, 4-first supporting assembly, 5-second supporting assembly, 6-rear supporting assembly, 7-pressing plate assembly, 8-positioning pin, 9-rear axle cast steel blank, 101-mounting bottom plate, 102-first mounting plate, 103-second mounting plate, 201-left side sliding block, 202-right side sliding block, 203-spring mounting seat, 204-floating spring, 205-V-shaped supporting seat, 206-first sliding seat cover plate, 207-second sliding seat cover plate, 208-limiting bolt, 209-positioning bolt, 401-top mounting plate, 402-left supporting frame, 403-right supporting frame, 404-bottom supporting frame, 601-rear supporting bottom plate, 3-second floating V-shaped supporting assembly, 4-first supporting assembly, 5-second supporting assembly, 6-rear supporting assembly, 7-left side sliding block, 203-right supporting frame, 404-bottom supporting frame, 601-rear supporting bottom plate, 3-floating V-floating assembly, 9-rear axle cast steel blank, 2-left side sliding block, and 3-left side sliding block, 602-left support plate, 603-right support plate, 604-first clamping bolt, 605-second clamping bolt.
Detailed Description
Specific example 1: the core of the utility model is to provide a floating V-shaped processing tool for a rear axle of a mine car, which is not limited by the deformation of a rear axle steel casting blank 9 after hardening and tempering when in specific use, realizes automatic floating positioning of the rear axle steel casting blank 9 in the horizontal direction, solves the problems of difficult processing and clamping and low processing efficiency of the rear axle steel casting blank 9 of the mine car, and in order to enable a person in the technical field to better understand the technical scheme of the utility model, the utility model is further described in detail by combining the drawings and the specific implementation mode of the specification, and it needs to be explained that when an element is called to be fixed on or arranged on another element, the element can be directly or indirectly arranged on the other element. When an element is referred to as being "connected to" another element, it can be directly or indirectly connected to the other element. The terms "left" and "right" used in this specification to denote orientation are used with reference to a particular structure shown in the drawings, and do not constitute a limitation on the structure.
As shown in the attached drawings 1, 2 and 3 of the specification, the floating V-shaped processing tool for the rear axle of the mine car mainly comprises a bottom plate assembly 1, a first floating V-shaped supporting assembly 2, a second floating V-shaped supporting assembly 3, a first support assembly 4, a second support assembly 5, a rear supporting assembly 6, a pressing plate assembly 7 and a positioning pin 8, wherein the bottom of the bottom plate assembly 1 for mounting the first floating V-shaped supporting assembly 2 and the second floating V-shaped supporting assembly 3 is fixedly mounted on an external machine tool through a first fastening bolt, the first floating V-shaped supporting assembly 2 and the second floating V-shaped supporting assembly 3 for horizontally floating and leveling a rear axle cast steel blank 9 are mounted on the upper portion of the bottom plate assembly 1, the bottoms of the first floating V-shaped supporting assembly 2 and the second floating V-shaped supporting assembly 3 are fixedly mounted on the upper portion of the bottom plate assembly 1 through a second fastening bolt, install on bottom plate closes piece 1 and is used for carrying out the first support of erection bracing and closes piece 4 and second support and closes piece 5 to rear axle cast steel blank 9, wherein, first support closes piece 4 and second support and closes piece 5 and closes 1 fastening together through third fastening bolt with the bottom plate, install on bottom plate closes piece 1 and be used for carrying out the back support that erection bracing was carried out to rear axle cast steel blank 9 rear portion and close piece 6, a clamp plate closes piece 7 for closing down the operation to rear axle cast steel blank 9 and installs on the upper portion of bottom plate closes piece 1 and links to each other with bottom plate closes piece 1, a locating pin 8 fixed mounting that is used for going on the position with peripheral hardware machine tool seat and corresponds the installation alignment closes piece 1 at the bottom plate.
As shown in fig. 4, the bottom plate assembly 1 for mounting and supporting the first floating V-shaped supporting assembly 2 and the second floating V-shaped supporting assembly 3 mainly includes a mounting bottom plate 101, a first mounting plate 102 and a second mounting plate 103, wherein the first mounting plate 102 for mounting and supporting the mounting bottom plate 101 is fixedly mounted on the left lower portion of the mounting bottom plate 101, the second mounting plate 103 for mounting and supporting the mounting bottom plate 101 is fixedly mounted on the right lower portion of the mounting bottom plate 101, threaded through holes for mounting first fastening bolts are processed on the first mounting plate 102 and the second mounting plate 103, and first fastening bolts for fastening the bottom plate assembly 1 to an external machine tool are mounted in the threaded through holes.
As shown in the specification, fig. 5 and fig. 6, the first floating V-shaped supporting assembly 2 and the second floating V-shaped supporting assembly 3, which are used for horizontally floating leveling of the rear axle steel casting blank 9, are the same in structure, and both comprise a left sliding block 201, a right sliding block 202, a spring mounting seat 203, a floating spring 204, a V-shaped support 205, a first sliding seat cover plate 206, a second sliding seat cover plate 207 and a limit bolt 208, wherein the bottoms of the left sliding block 201 and the right sliding block 202 for mounting and supporting the first sliding seat cover plate 206 and the second sliding seat cover plate 207 are mounted on the upper portion of the mounting base plate 101 and are connected with the mounting base plate 101 through fastening bolts, wherein both sides of the first sliding seat cover plate 206 are mounted on the left sliding block 201 and the right sliding block 202 and are connected with the left sliding block 201 and the right sliding block 202, both sides of the second sliding seat cover plate 207 are mounted on the left sliding block 201 and the right sliding block 202 and are connected with the left sliding block 201 and the right sliding block 202, a hollow cavity for mounting a V-shaped support 205 is formed between a left side sliding block 201 and a right side sliding block 202, the bottom of a spring mounting seat 203 for mounting a floating spring 204 is mounted on a mounting bottom plate 101 at the bottom of the hollow cavity, the floating spring 204 for elastically adjusting the V-shaped support 205 is inserted and sleeved on a support platform outside the spring mounting seat 203 and is connected with the spring mounting seat 203, the bottom of the V-shaped support 205 for directly mounting, supporting and leveling a rear axle cast steel blank 9 is mounted at the upper part of the floating spring 204 and is connected with the floating spring 204, two sides of the V-shaped support 205 are respectively in sliding contact with the inner side walls of the left side sliding block 201 and the right side sliding block 202, a through hole for penetrating a limit bolt 208 is processed at the top of the spring mounting seat 203, the limit bolt 208 for upwards limiting the V-shaped support 205 penetrates through the through hole and is mounted at the bottom of the V-shaped support 205 and is fixedly connected with the bottom of the V-shaped support 205, a threaded through hole for installing a positioning bolt 209 is processed on the second slide cover plate 207, and a positioning bolt 209 for fixing the position of the V-shaped support 205 is installed in the threaded through hole, wherein the positioning bolt 209 is connected with the threaded through hole processed on the second slide cover plate 207 in a threaded fit manner.
As shown in fig. 7 of the specification, the first support assembly 4 and the second support assembly 5 for placing rigid support for the rear axle cast steel blank 9 for the first time are formed by the same structure, and include a top mounting plate 401, a left support frame 402, a right support frame 403 and a bottom support frame 404, threaded through holes are processed at four corners of the bottom support frame 404, fastening bolts for fastening the bottom support frame 404 on the mounting base plate 101 are installed in the threaded through holes, the bottom support frame 404 is installed on the mounting base plate 101 through the fastening bolts, bottoms of the left support frame 402 and the right support frame 403 for installing and supporting the top mounting plate 401 are fixedly installed on the bottom support frame 404, and the top mounting plate 401 for directly contacting the rear axle cast steel blank 9 is fixedly installed at upper parts of the left support frame 402 and the right support frame 403.
As shown in fig. 8, the rear support assembly 6 for mounting and supporting the rear side of the rear axle steel casting blank 9 comprises a rear support base plate 601, a left support plate 602, a right support plate 603, a first clamping bolt 604 and a second clamping bolt 605, wherein, a rear supporting bottom plate 601 for mounting and supporting the left supporting plate 602 and the right supporting plate 603 is mounted on the mounting bottom plate 101 and connected with the mounting bottom plate 101 through a connecting bolt, the bottoms of a left support plate 602 and a right support plate 603 which are used for directly mounting and supporting the rear side of the rear axle steel casting blank 9 are mounted on the rear support bottom plate 601 and welded with the rear support bottom plate 601, a first clamping bolt 604 for clamping and positioning the rear axle steel casting blank 9 is arranged on the left support plate 602 and is in threaded fit connection with the left support plate 602, a second clamping bolt 605 for clamping and positioning the rear axle steel casting blank 9 is mounted on the right support plate 603 and is in threaded engagement with the right support plate 603.
The using process of the utility model during specific operation and use is as follows: because the rear axle casting structure of the large-scale mine car is complex, is easy to deform after hardening and tempering, the datum line of a workpiece can be determined by a manual marking mode, the requirement on processing precision is higher, and the situation of a processing position is special, the scheme adopts a first support assembly 4 and a second support assembly 5 to pre-support a rear axle steel casting blank 9, automatically balances the workpiece on the rear axle steel casting blank 9 through a first floating V-shaped support assembly 2 and a second floating V-shaped support assembly 3 which are arranged on a bottom plate assembly 1, adopts a limiting mode to position the rear axle steel casting blank 9 in front, back, left and right directions through a rear support assembly 6, automatically floats and positions in the horizontal direction, and greatly shortens the leveling time and alignment time of the workpiece, the process of the utility model during specific operation is that the first floating V-shaped support assembly 2 and the second floating V-shaped support assembly 3 are fixed on a rear axle floating tool bottom plate (namely an installation bottom plate 101 in the bottom plate assembly 1) through positioning pins 8 and fastening bolts, the V-shaped support 205 is floated in a hollow cavity between the left sliding stop 201 and the right sliding stop 202 through the floating spring 204 to move up and down, an operator can hang the rear axle steel casting blank 9 on the first floating V-shaped support assembly 2, the second floating V-shaped support assembly 3, the first support assembly 4, the second support assembly 5 and the rear support assembly 6 through an external hoisting device, at the time, the V-shaped support 205 is pressed downwards in the hollow cavity between the left sliding stop 201 and the right sliding stop 202 at two sides of the rear axle steel casting blank 9, the floating spring 204 at the lower side of the V-shaped support 205 is compressed, the rear axle steel casting blank 9 is in a floating state under the support of the V-shaped support 205, at the time, the leveling operation can be carried out on the rear axle steel casting blank 9, and after the adjustment operation is finished, the operator can clamp the bottom of the rear side of the rear axle steel casting blank 9 through the first clamping bolt 604 and the second clamping bolt 605 in the rear support assembly 6, the V-shaped support 205 is fastened in the slide (i.e. in the hollow cavity between the left side slide 201 and the right side slide 202) by a positioning bolt 209 mounted on the second slide cover plate 207, and finally, the rear axle steel casting blank 9 is pressed tightly by the pressing plate assembly 7. The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the utility model as claimed.
Claims (8)
1. A floating V-shaped processing tool for a rear axle of a mine car is characterized by comprising a bottom plate assembly (1), a first floating V-shaped supporting assembly (2), a second floating V-shaped supporting assembly (3), a first support assembly (4), a second support assembly (5), a rear supporting assembly (6), a pressing plate assembly (7) and a positioning pin (8), wherein the bottom of the bottom plate assembly (1) is installed on an external machine tool through a first fastening bolt, the first floating V-shaped supporting assembly (2) and the second floating V-shaped supporting assembly (3) are installed on the upper portion of the bottom plate assembly (1), the bottoms of the first floating V-shaped supporting assembly (2) and the second floating V-shaped supporting assembly (3) are fastened on the upper portion of the bottom plate assembly (1) through a second fastening bolt, the first support assembly (4) and the second support assembly (5) are installed on the bottom plate assembly (1), first support closes piece (4) and second support and closes piece (5) and close piece (1) fastening together through third fastening bolt with the bottom plate, support and close piece (6) after installing on bottom plate closes piece (1), clamp plate close piece (7) install on the upper portion of bottom plate close piece (1) and close piece (1) with the bottom plate and link to each other, locating pin (8) install on bottom plate close piece (1) and close piece (1) with the bottom plate and link to each other.
2. The floating V-shaped machining tool for the rear axle of the mine car as claimed in claim 1, wherein the bottom plate assembly (1) comprises a mounting bottom plate (101), a first mounting plate (102) and a second mounting plate (103), the first mounting plate (102) is mounted on the left side of the lower portion of the mounting bottom plate (101) and fixedly connected with the mounting bottom plate (101), the second mounting plate (103) is mounted on the right side of the lower portion of the mounting bottom plate (101) and fixedly connected with the mounting bottom plate (101), threaded through holes are machined in the first mounting plate (102) and the second mounting plate (103), and first fastening bolts are mounted in the threaded through holes.
3. The floating V-shaped processing tool for the rear axle of the mine car as claimed in claim 2, wherein the first floating V-shaped supporting assembly (2) and the second floating V-shaped supporting assembly (3) are the same in structure and comprise a left sliding block (201), a right sliding block (202), a spring mounting seat (203), a floating spring (204), a V-shaped support (205), a first sliding seat cover plate (206), a second sliding seat cover plate (207) and a limit bolt (208), the bottoms of the left sliding block (201) and the right sliding block (202) are mounted on the upper portion of the mounting base plate (101) and are connected with the mounting base plate (101) through fastening bolts, the two sides of the first sliding seat cover plate (206) are mounted on the left sliding block (201) and the right sliding block (202) and are connected with the left sliding block (201) and the right sliding block (202), the two sides of the second sliding seat (207) are mounted on the left sliding block (201) and the right sliding block (202) The upper part of the lower part of the upper part of the lower part of the upper part of the lower part of the upper part of the lower part of the upper part of the lower part of the upper part of the lower part of the upper part of the lower part of the upper part of the lower part of the upper part of the lower part of the upper part of the lower part of the.
4. The tool for machining the floating V-shaped rear axle of the mine car according to claim 3, wherein a threaded through hole is machined in the second sliding seat cover plate (207), a positioning bolt (209) is installed in the threaded through hole, and the positioning bolt (209) is in threaded fit connection with the threaded through hole machined in the second sliding seat cover plate (207).
5. The tool for machining the floating V-shaped of the rear axle of the mine car as claimed in claim 3, wherein a support platform is machined at the bottom of the outer side of the spring mounting seat (203), and the bottom of the floating spring (204) is mounted on the support platform and connected with the support platform.
6. The tool for machining the floating V-shaped of the rear axle of the mine car as claimed in claim 3, wherein a gasket is arranged at the lower part of the V-shaped support (205) and is connected with the lower part of the V-shaped support (205).
7. The floating V-shaped processing tool for the rear axle of the mine car as claimed in claim 2, wherein the first support assembly (4) and the second support assembly (5) are the same structure, the two support frames comprise a top mounting plate (401), a left support frame (402), a right support frame (403) and a bottom support frame (404), threaded through holes are processed at the four corners of the bottom support frame (404), fastening bolts are arranged in the threaded through holes, the bottom support frame (404) is arranged on the mounting bottom plate (101) through fastening bolts, the bottoms of the left support frame (402) and the right support frame (403) are arranged on the bottom support frame (404) and are fixedly connected with the bottom support frame (404), the top mounting plate (401) is mounted on the left support frame (402) and the right support frame (403) and is fixedly connected with the left support frame (402) and the right support frame (403).
8. The floating V-shaped processing tool for the rear axle of the mine car as claimed in claim 2, wherein the rear supporting assembly (6) comprises a rear supporting base plate (601), a left supporting plate (602), a right supporting plate (603), a first clamping bolt (604) and a second clamping bolt (605), the rear supporting bottom plate (601) is arranged on the mounting bottom plate (101) and is connected with the mounting bottom plate (101) through a connecting bolt, the bottoms of the left support plate (602) and the right support plate (603) are arranged on the rear support bottom plate (601) and are welded with the rear support bottom plate (601), the first clamping bolt (604) is arranged on the left supporting plate (602) and is in threaded fit connection with the left supporting plate (602), the second clamping bolt (605) is arranged on the right support plate (603) and is in threaded fit connection with the right support plate (603).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122400824.6U CN216178545U (en) | 2021-10-02 | 2021-10-02 | Floating V-shaped machining tool for rear axle of mine car |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122400824.6U CN216178545U (en) | 2021-10-02 | 2021-10-02 | Floating V-shaped machining tool for rear axle of mine car |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216178545U true CN216178545U (en) | 2022-04-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122400824.6U Active CN216178545U (en) | 2021-10-02 | 2021-10-02 | Floating V-shaped machining tool for rear axle of mine car |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216178545U (en) |
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2021
- 2021-10-02 CN CN202122400824.6U patent/CN216178545U/en active Active
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