CN220748300U - Temporary support device for tunneling and anchoring machine - Google Patents

Temporary support device for tunneling and anchoring machine Download PDF

Info

Publication number
CN220748300U
CN220748300U CN202322483710.1U CN202322483710U CN220748300U CN 220748300 U CN220748300 U CN 220748300U CN 202322483710 U CN202322483710 U CN 202322483710U CN 220748300 U CN220748300 U CN 220748300U
Authority
CN
China
Prior art keywords
sleeve
hinged
support
plate
platform
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
Application number
CN202322483710.1U
Other languages
Chinese (zh)
Inventor
崔奇峰
张亚明
闫伟伟
兰宝石
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shanxi Tian Ju Heavy Industry Co ltd
Original Assignee
Shanxi Tian Ju Heavy Industry Co ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Shanxi Tian Ju Heavy Industry Co ltd filed Critical Shanxi Tian Ju Heavy Industry Co ltd
Priority to CN202322483710.1U priority Critical patent/CN220748300U/en
Application granted granted Critical
Publication of CN220748300U publication Critical patent/CN220748300U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Landscapes

  • Earth Drilling (AREA)

Abstract

The utility model provides a temporary support device for an anchor tunneling machine, which relates to the technical field of roadway support and comprises a sliding platform, sleeve adjusting cylinders, a sleeve assembly and a top beam assembly, wherein the sleeve assembly is hinged to the front end of the top of the sliding platform; the utility model is supported by the top beam assembly, is supported above by the top beam support, the support side turning plate can be manually unfolded according to the requirement, and can be stretched out by the front support oil cylinder to drive the front support turning plate to be unfolded, so that the protection effect on the roadway head-on working surface is achieved, the front support upper side turning plate and the front support lower side turning plate can be manually unfolded according to the requirement, the support area is enlarged, the double protection of the roadway top plate and the head-on is conveniently realized, and the safety of operators is ensured.

Description

Temporary support device for tunneling and anchoring machine
Technical Field
The utility model relates to the technical field of roadway support, in particular to a temporary support device for an excavating and anchoring machine.
Background
After the cutting is finished, the drill boom part carries out anchor rod and anchor cable supporting operation on the cut tunnel top plate, side wall and the like, and during the anchor supporting operation, the drill boom extends out to the head-on working surface of the tunnel from the rear side of the machine body in a large stroke;
the traditional temporary support device has small support area, only can temporarily support a local area of a tunnel roof, and can replace a drill rod, fill an anchoring agent and the like when a person stands under an empty roof, so that the person faces the risks of roof collapse and head-on roof collapse of the tunnel, and has great potential safety hazards.
Disclosure of Invention
Aiming at the problems, the utility model provides the temporary support device for the anchor digger, which is convenient for realizing double protection of a tunnel roof and a head-on and ensures the safety of operators.
In order to achieve the purpose of the utility model, the utility model is realized by the following technical scheme: the temporary support device for the tunneling and anchoring machine comprises a sliding platform, sleeve adjusting cylinders, a sleeve assembly and a top beam assembly, wherein the sleeve assembly is hinged to the front end of the top of the sliding platform, the sleeve adjusting cylinders are provided with two groups, the cylinder bodies of the two groups of sleeve adjusting cylinders are hinged to connecting lugs on the sliding platform, the lower end of the outer side of the sleeve assembly is provided with a connecting frame, the output end of the sleeve adjusting cylinders is hinged to the connecting frame, the top of the sleeve assembly is provided with a swinging cylinder, and the top beam assembly is connected with the swinging cylinder;
the top beam assembly comprises a top beam support and a front support turning plate, wherein the front support turning plate is hinged to two sides of the front end of the top beam support, a front support oil cylinder is hinged to two sides of the front end of the bottom of the top beam support, the output end of the front support oil cylinder is hinged to the front support turning plate, support side turning plates are hinged to two sides of the top beam support, and a front support upper side turning plate and a front support lower side turning plate are hinged to the upper end and the lower end of the outer side of the front support turning plate respectively.
The further improvement is that: the sliding platform comprises a slide fixing plate, a slide bottom plate and an operation platform, slide pressing plates are arranged on two sides of the top of the slide fixing plate, the slide bottom plate is movably mounted with the slide pressing plates, a platform telescopic cylinder is hinged to connecting lugs at the rear ends of two sides of the slide bottom plate, and the output ends of the two groups of the platform telescopic cylinders are hinged to connecting lugs at the front ends of two sides of the slide fixing plate respectively.
The further improvement is that: the rear end of the operation platform is hinged to the top of the slideway bottom plate, two sides of the front end of the slideway bottom plate are hinged to platform supporting oil cylinders, and the output end of each platform supporting oil cylinder is hinged to the front end of the bottom of the operation platform.
The further improvement is that: the two sides of the bottom of the operating platform are provided with rotary speed reducers, the output ends of the rotary speed reducers are provided with connecting discs, the connecting discs are provided with bottom turning plates, and the outer sides of the bottom turning plates are hinged with expansion plates.
The further improvement is that: the front end and the rear end of the bottom of the slideway fixing plate are respectively provided with a front supporting seat and a rear supporting seat, and the front supporting seat and the rear supporting seat are used for being fixed with a cutting part of the tunneling and anchoring machine.
The further improvement is that: the sleeve assembly comprises an outer sleeve, a middle sleeve, an inner sleeve and a secondary telescopic oil cylinder, wherein the inner sleeve is nested in the middle sleeve, the middle sleeve is nested in the outer sleeve, a cylinder body of the secondary telescopic oil cylinder is fixedly connected with the inner bottom of the outer sleeve, and the output end of the secondary telescopic oil cylinder is hinged with a connecting lug at the top of the inner sleeve.
The further improvement is that: the top of inner skleeve is equipped with the mount pad, and rotates on the mount pad and be equipped with the fixing base, swing hydro-cylinder installs on the fixing base, the both sides at mount pad top all are equipped with the locating pin, the both sides of fixing base bottom all are equipped with the guide pin bushing, be connected with the spring between locating pin and the guide pin bushing.
The beneficial effects of the utility model are as follows:
1. the utility model is supported by the top beam assembly, is supported above by the top beam support, the support side turning plate can be manually unfolded according to the requirement, and can be stretched out by the front support oil cylinder to drive the front support turning plate to be unfolded, so that the protection effect on the roadway head-on working surface is achieved, the front support upper side turning plate and the front support lower side turning plate can be manually unfolded according to the requirement, the support area is enlarged, the double protection of the roadway top plate and the head-on is conveniently realized, and the safety of operators is ensured.
2. According to the utility model, the supporting height is adjusted through the sleeve assembly, and the mode that the large-stroke two-stage telescopic oil cylinder is matched with the multi-stage sleeve is adopted, so that the supporting requirements of different heights of the roadway are met.
3. According to the utility model, the slide bottom plate is driven to slide back and forth along the slide pressing plate by the telescopic cylinder of the platform, so that the back and forth sliding function of the sliding platform is realized, the angle change adjustment of the operating platform can be driven by the telescopic cylinder of the platform support cylinder, the bottom turning plate can be driven to be outwards unfolded or inwards retracted by the rotary speed reducer, thus not only the back and forth sliding and the up and down angle adjustment can be realized, but also the bottom turning plate can be rotated and unfolded in a large area, and the requirements of different positions and angle stations of personnel can be met.
Drawings
FIG. 1 is a front view of the present utility model;
FIG. 2 is a schematic view of a header assembly of the present utility model;
FIG. 3 is a schematic bottom view of the sliding platform of the present utility model;
FIG. 4 is a schematic top view of a sliding platform according to the present utility model;
FIG. 5 is a side cross-sectional view of the sleeve assembly of the present utility model;
fig. 6 is a top cross-sectional view of the sleeve assembly of the present utility model.
Wherein: 1. a sliding platform; 2. sleeve adjusting oil cylinder; 3. a sleeve assembly; 4. a top beam assembly; 5. a connecting frame; 6. swinging the oil cylinder; 7. a top beam support; 8. a front support flap; 9. a front support cylinder; 10. the support frame side turning plate; 11. the front support upper side turning plate; 12. a front support lower side turning plate; 13. a slideway fixing plate; 14. a slideway bottom plate; 15. an operating platform; 16. a slideway pressing plate; 17. a platform telescopic oil cylinder; 18. a platform supporting cylinder; 19. a rotary speed reducer; 20. a bottom turning plate; 21. an expansion board; 22. a front support base; 23. a rear support base; 24. an outer sleeve; 25. a middle sleeve; 26. an inner sleeve; 27. a second-stage telescopic oil cylinder; 28. a mounting base; 29. a fixing seat; 30. a positioning pin; 31. guide sleeve; 32. and (3) a spring.
Detailed Description
The present utility model will be further described in detail with reference to the following examples, which are only for the purpose of illustrating the utility model and are not to be construed as limiting the scope of the utility model.
Example 1
According to fig. 1, 2, 3 and 4, the embodiment provides a temporary supporting device for an anchor driving machine, which comprises a sliding platform 1, sleeve adjusting cylinders 2, a sleeve assembly 3 and a top beam assembly 4, wherein the sleeve assembly 3 is hinged to the front end of the top of the sliding platform 1, the sleeve adjusting cylinders 2 are provided with two groups, the cylinder bodies of the two groups of sleeve adjusting cylinders 2 are hinged to connecting lugs on the sliding platform 1, the lower end of the outer side of the sleeve assembly 3 is provided with a connecting frame 5, the output end of the sleeve adjusting cylinders 2 is hinged to the connecting frame 5, the top of the sleeve assembly 3 is provided with a swinging cylinder 6, and the top beam assembly 4 is connected with the swinging cylinder 6;
the top beam assembly 4 comprises a top beam support 7 and a front support turning plate 8, the front support turning plate 8 is hinged to two sides of the front end of the top beam support 7, a front support oil cylinder 9 is hinged to two sides of the front end of the bottom of the top beam support 7, the output end of the front support oil cylinder 9 is hinged to the front support turning plate 8, support side turning plates 10 are hinged to two sides of the top beam support 7, and a front support upper side turning plate 11 and a front support lower side turning plate 12 are hinged to the upper end and the lower end of the outer side of the front support turning plate 8 respectively. The top beam assembly 4 is formed by welding and processing square steel frames, has good structural strength, light weight and large supporting area, can expand the supporting turning plate according to the roadway conditions, and meets the requirements of various supporting conditions of the roadway; when the support device is used, the support device is supported by the top beam assembly 4, the support frame side turning plate 10 can be manually unfolded according to the requirement, the front support turning plate 8 can be driven to be unfolded by extending the front support oil cylinder 9, the protection effect on the roadway head-on working surface is achieved, the front support upper side turning plate 11 and the front support lower side turning plate 12 can be manually unfolded according to the requirement, the support area is enlarged, and the double protection of the roadway top plate and the head-on is convenient to realize.
The sliding platform 1 comprises a slide fixing plate 13, a slide bottom plate 14 and an operation platform 15, slide pressing plates 16 are arranged on two sides of the top of the slide fixing plate 13, the slide bottom plate 14 and the slide pressing plates 16 are movably mounted, platform telescopic cylinders 17 are hinged to connecting lugs at the rear ends of two sides of the slide bottom plate 14, and two groups of output ends of the platform telescopic cylinders 17 are hinged to connecting lugs at the front ends of two sides of the slide fixing plate 13 respectively. The rear end of the operation platform 15 is hinged to the top of the slideway bottom plate 14, two sides of the front end of the slideway bottom plate 14 are hinged to platform support oil cylinders 18, and the output end of the platform support oil cylinders 18 is hinged to the front end of the bottom of the operation platform 15. Both sides of the bottom of the operation platform 15 are provided with rotary speed reducers 19, the output end of each rotary speed reducer 19 is provided with a connecting disc, the connecting disc is provided with a bottom turning plate 20, and the outer side of each bottom turning plate 20 is hinged with an expansion plate 21. The front and rear ends of the bottom of the slideway fixing plate 13 are respectively provided with a front supporting seat 22 and a rear supporting seat 23, and the front supporting seat 22 and the rear supporting seat 23 are used for being fixed with a cutting part of the anchor digger. When the device is used, the sliding platform 1 is fixed with the cutting part of the anchor driving machine, the sliding platform base plate 14 is driven to slide back and forth along the sliding platform pressing plate 16 by the expansion of the platform telescopic oil cylinder 17, the back and forth sliding function of the sliding platform 1 is realized, the angle change adjustment of the operating platform 15 can be driven by the expansion of the platform supporting oil cylinder 18, the bottom turning plate 20 can be driven to be unfolded outwards or retracted inwards by the rotary speed reducer 19, so that the device can slide back and forth and can be adjusted in angle up and down, and meanwhile, the bottom turning plate 20 can be rotated and matched with the expansion plate 21 to be unfolded in a large area, and the requirements of different positions and angle stations of personnel are met.
Example two
According to fig. 1, 2, 5 and 6, the embodiment provides a temporary supporting device for an anchor driving machine, which comprises a sliding platform 1, sleeve adjusting cylinders 2, a sleeve assembly 3 and a top beam assembly 4, wherein the sleeve assembly 3 is hinged to the front end of the top of the sliding platform 1, the sleeve adjusting cylinders 2 are provided with two groups, the cylinder bodies of the two groups of sleeve adjusting cylinders 2 are hinged to connecting lugs on the sliding platform 1, the lower end of the outer side of the sleeve assembly 3 is provided with a connecting frame 5, the output end of the sleeve adjusting cylinders 2 is hinged to the connecting frame 5, the top of the sleeve assembly 3 is provided with a swinging cylinder 6, and the top beam assembly 4 is connected with the swinging cylinder 6;
the top beam assembly 4 comprises a top beam support 7 and a front support turning plate 8, the front support turning plate 8 is hinged to two sides of the front end of the top beam support 7, a front support oil cylinder 9 is hinged to two sides of the front end of the bottom of the top beam support 7, the output end of the front support oil cylinder 9 is hinged to the front support turning plate 8, support side turning plates 10 are hinged to two sides of the top beam support 7, and a front support upper side turning plate 11 and a front support lower side turning plate 12 are hinged to the upper end and the lower end of the outer side of the front support turning plate 8 respectively. The top beam assembly 4 is formed by welding and processing square steel frames, has good structural strength, light weight and large supporting area, can expand the supporting turning plate according to the roadway conditions, and meets the requirements of various supporting conditions of the roadway; when the support device is used, the support device is supported by the top beam assembly 4, the support frame side turning plate 10 can be manually unfolded according to the requirement, the front support turning plate 8 can be driven to be unfolded by extending the front support oil cylinder 9, the protection effect on the roadway head-on working surface is achieved, the front support upper side turning plate 11 and the front support lower side turning plate 12 can be manually unfolded according to the requirement, the support area is enlarged, and the double protection of the roadway top plate and the head-on is convenient to realize.
The sleeve assembly 3 comprises an outer sleeve 24, a middle sleeve 25, an inner sleeve 26 and a secondary telescopic oil cylinder 27, wherein the inner sleeve 26 is nested in the middle sleeve 25, the middle sleeve 25 is nested in the outer sleeve 24, a cylinder body of the secondary telescopic oil cylinder 27 is fixedly connected with the bottom of the inner part of the outer sleeve 24, and the output end of the secondary telescopic oil cylinder 27 is hinged with a connecting lug at the top of the inner part of the inner sleeve 26. The top of inner skleeve 26 is equipped with mount pad 28, and the rotation is equipped with fixing base 29 on the mount pad 28, swing hydro-cylinder 6 is installed on fixing base 29, the both sides at mount pad 28 top all are equipped with locating pin 30, the both sides of fixing base 29 bottom all are equipped with guide pin bushing 31, be connected with spring 32 between locating pin 30 and the guide pin bushing 31. When the support device is used, the support height is adjusted through the sleeve assembly 3, the large-stroke two-stage telescopic oil cylinder 27 is matched with a multi-stage sleeve, the support requirements of different heights of a roadway are met, as the two sides of the top of the mounting seat 28 are provided with the positioning pins 30, the two sides of the bottom of the fixing seat 29 are provided with the guide sleeves 31, and the springs 32 are connected between the positioning pins 30 and the guide sleeves 31, so that certain support elastic buffer potential energy can be provided.
The temporary supporting device for the tunneling and anchoring machine is supported by the top beam assembly 4, is supported above by the top beam supporting frame 7, can be manually unfolded according to the requirement, can extend out by the front supporting oil cylinder 9, can drive the front supporting turning plate 8 to be unfolded, plays a role in protecting the roadway head-on working surface, and can manually unfold the front supporting upper turning plate 11 and the front supporting lower turning plate 12 according to the requirement, so that the supporting area is enlarged, the double protection of a roadway top plate and the head-on is conveniently realized, and the safety of operators is ensured; the supporting height of the product is adjusted through the sleeve assembly 3, and the supporting requirements of different heights of the roadway are met by adopting a mode that a large-stroke secondary telescopic oil cylinder 27 is matched with a multi-stage sleeve; simultaneously, the product drives the slideway bottom plate 14 to slide back and forth along the slideway pressing plate 16 through the extension of the platform extension cylinder 17, so that the back and forth sliding function of the sliding platform 1 is realized, the angle change adjustment of the operation platform 15 can be driven through the extension of the platform support cylinder 18, the bottom turning plate 20 can be driven to be outwards unfolded or inwards retracted through the rotary speed reducer 19, and therefore, the product can slide back and forth and can be subjected to up and down angle adjustment, and meanwhile, the bottom turning plate 20 can be rotated and unfolded in a large area, and the requirements of different positions and angle stations of personnel are met.
The foregoing has shown and described the basic principles, principal features and advantages of the utility model. It will be understood by those skilled in the art that the present utility model is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present utility model, and various changes and modifications may be made without departing from the spirit and scope of the utility model, which is defined in the appended claims. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims (7)

1. The utility model provides a dig anchor machine temporary support device, includes sliding platform (1), sleeve adjustment hydro-cylinder (2), sleeve assembly (3) and back timber assembly (4), its characterized in that: the sleeve assembly (3) is hinged to the front end of the top of the sliding platform (1), two groups of sleeve adjusting cylinders (2) are arranged, the cylinder bodies of the two groups of sleeve adjusting cylinders (2) are hinged to connecting lugs on the sliding platform (1), a connecting frame (5) is arranged at the lower end of the outer side of the sleeve assembly (3), the output end of the sleeve adjusting cylinders (2) is hinged to the connecting frame (5), a swinging cylinder (6) is arranged at the top of the sleeve assembly (3), and the top beam assembly (4) is connected with the swinging cylinder (6);
the top beam assembly (4) comprises a top beam support frame (7) and a front support turning plate (8), wherein the front support turning plate (8) is hinged to two sides of the front end of the top beam support frame (7), a front support oil cylinder (9) is hinged to two sides of the front end of the bottom of the top beam support frame (7), the output end of the front support oil cylinder (9) is hinged to the front support turning plate (8), support frame side turning plates (10) are hinged to two sides of the top beam support frame (7), and a front support upper side turning plate (11) and a front support lower side turning plate (12) are hinged to the upper end and the lower end of the outer side of the front support turning plate (8) respectively.
2. The temporary support device for an anchor and dig machine according to claim 1, wherein: slide platform (1) is including slide fixed plate (13), slide bottom plate (14) and operation platform (15), the both sides at slide fixed plate (13) top all are equipped with slide clamp plate (16), slide bottom plate (14) and slide clamp plate (16) movable mounting, all articulate on the engaging lug of slide bottom plate (14) both sides rear end has platform telescopic cylinder (17), and two sets of the output of platform telescopic cylinder (17) respectively with the engaging lug of slide fixed plate (13) both sides front end articulates.
3. The temporary support device for an anchor mining machine according to claim 2, wherein: the rear end of the operation platform (15) is hinged to the top of the slideway bottom plate (14), two sides of the front end of the slideway bottom plate (14) are hinged to platform support oil cylinders (18), and the output end of each platform support oil cylinder (18) is hinged to the front end of the bottom of the operation platform (15).
4. A temporary support device for an anchor and dig machine according to claim 3, wherein: both sides of operation platform (15) bottom all are equipped with rotary speed reducer (19), and the output of rotary speed reducer (19) is equipped with the connection pad, be equipped with on the connection pad and turn over board (20), and the outside of turning over board (20) at the bottom articulates there is expansion board (21).
5. The temporary support device for an anchor and dig machine according to claim 4, wherein: the front end and the rear end of the bottom of the slideway fixing plate (13) are respectively provided with a front supporting seat (22) and a rear supporting seat (23), and the front supporting seat (22) and the rear supporting seat (23) are used for being fixed with a cutting part of the tunneling and anchoring machine.
6. The temporary support device for an anchor and dig machine according to claim 1, wherein: the sleeve assembly (3) comprises an outer sleeve (24), a middle sleeve (25), an inner sleeve (26) and a secondary telescopic oil cylinder (27), wherein the inner sleeve (26) is nested in the middle sleeve (25), the middle sleeve (25) is nested in the outer sleeve (24), a cylinder body of the secondary telescopic oil cylinder (27) is fixedly connected with the inner bottom of the outer sleeve (24), and the output end of the secondary telescopic oil cylinder (27) is hinged to a connecting lug at the inner top of the inner sleeve (26).
7. The temporary support device for an anchor and dig machine according to claim 6, wherein: the top of inner skleeve (26) is equipped with mount pad (28), and rotates on mount pad (28) and be equipped with fixing base (29), swing hydro-cylinder (6) are installed on fixing base (29), the both sides at mount pad (28) top all are equipped with locating pin (30), the both sides of fixing base (29) bottom all are equipped with guide pin bushing (31), be connected with spring (32) between locating pin (30) and guide pin bushing (31).
CN202322483710.1U 2023-09-13 2023-09-13 Temporary support device for tunneling and anchoring machine Active CN220748300U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202322483710.1U CN220748300U (en) 2023-09-13 2023-09-13 Temporary support device for tunneling and anchoring machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202322483710.1U CN220748300U (en) 2023-09-13 2023-09-13 Temporary support device for tunneling and anchoring machine

Publications (1)

Publication Number Publication Date
CN220748300U true CN220748300U (en) 2024-04-09

Family

ID=90557774

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202322483710.1U Active CN220748300U (en) 2023-09-13 2023-09-13 Temporary support device for tunneling and anchoring machine

Country Status (1)

Country Link
CN (1) CN220748300U (en)

Similar Documents

Publication Publication Date Title
US11619131B2 (en) Six-arm tunneling and anchoring machine for integrating tunneling and anchoring
CN100410491C (en) Pipe blade assembling machine for rectangular shield
CN208416529U (en) Anchor Care device for development machine
CN210292125U (en) Outer quick-witted support protector of air conditioner
CN212744006U (en) Crank arm type tunneling and anchoring all-in-one machine with random support
CN220748300U (en) Temporary support device for tunneling and anchoring machine
CN215369896U (en) Advance support platform mechanism capable of realizing long digging and long supporting
CN110905406A (en) Multifunctional impact type hydraulic drill carriage suitable for rock roadway working face construction
CN212389333U (en) Support system
CN209742887U (en) Crushing device and arch center mounting crushing arm
CN209780931U (en) Redundant-driven three-degree-of-freedom parallel hydraulic support
CN116136179A (en) Disconnect-type support platform
CN212583617U (en) Novel collapsible airborne anchor protects platform
CN113882813B (en) Underground rapid tunneling advanced drilling device and method for coal mine
CN215256172U (en) Mine roadway grooving machine
CN110617089B (en) Stable clamping arch installing machine
CN110645027B (en) Construction method by arch installing machine
CN115012820A (en) High-adaptability narrow drill carriage with compact structure for coal mine
CN111663897A (en) Novel collapsible airborne anchor protects platform
CN109838244B (en) Foldable large-area operation platform device
CN210885004U (en) Mechanical suspension arm assembly
CN221256765U (en) Trolley arm support
CN217206307U (en) Tunnel culvert stake well rotary drill aircraft nose structure
CN106761872B (en) A kind of liftable, folding, stretching, extension machine-carried forepoling device
CN217028920U (en) Onboard support platform system for development machine

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant