CN212778906U - Variable-pitch assembly and variable-pitch firework assembling barrel machine - Google Patents
Variable-pitch assembly and variable-pitch firework assembling barrel machine Download PDFInfo
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- CN212778906U CN212778906U CN202020992038.2U CN202020992038U CN212778906U CN 212778906 U CN212778906 U CN 212778906U CN 202020992038 U CN202020992038 U CN 202020992038U CN 212778906 U CN212778906 U CN 212778906U
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Abstract
The utility model provides a variable pitch assembly, the variable pitch assembly comprises an upper positioning plate, a lower positioning plate and a guide pipe, wherein the upper positioning plate is uniformly provided with upper guide holes, the space between the upper guide holes is consistent with the space between the inner cylinders in the transfer box, the lower positioning plate is uniformly provided with lower guide holes, the space between the lower guide holes is consistent with the space between the outer cylinders in the outer cylinder assembly, and the space between the inner cylinders in the transfer box is unequal to the space between the outer cylinders in the outer cylinder assembly; the upper positioning plate and the lower positioning plate are oppositely arranged, two ends of the guide pipe are respectively connected with the upper guide hole and the lower guide hole, and the guide pipe, the upper guide hole and the lower guide hole are arranged in a one-to-one correspondence mode. The problem that the cylinder cannot be closed due to the fact that the distance between the inner cylinders in the turnover box is inconsistent with the distance between the outer cylinders in the outer cylinder assembly is solved through the variable pitch assembly. The utility model also provides a but variable pitch fireworks equipment combination section of thick bamboo machine including above-mentioned variable pitch subassembly can realize automatic combination section of thick bamboo, need not artificial intervention, has improved production efficiency.
Description
Technical Field
The utility model relates to a fireworks mechanical equipment technical field, concretely relates to displacement subassembly and variable pitch fireworks equipment closes a section of thick bamboo machine.
Background
The current firework assembling barrel combining machine has a narrow application range, and because the hole distance of the turnover box is matched with the hole distance of the outer barrel frame, the existing barrel combining machine can only fill the firework inner barrel specified by equipment into the firework outer barrel.
However, according to market demands, the pitch of the outer cylinder frame can change, which causes the dislocation of the pitch of the turnover box and the pitch of the outer cylinder frame, which causes the cylinder closing machine to fail to close the cylinder normally, and needs to manufacture or change the equipment greatly, and causes other equipment of the production line to change, which causes a lot of waste of capital.
In conclusion, a variable-pitch firework cylinder assembling machine is urgently needed to solve the problems in the prior art.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a displacement subassembly, concrete technical scheme is as follows:
a variable-pitch assembly comprises an upper positioning plate, a lower positioning plate and a guide pipe, wherein upper guide holes are uniformly distributed in the upper positioning plate, the distance between the upper guide holes is consistent with the distance between the inner cylinders in a turnover box, lower guide holes are uniformly distributed in the lower positioning plate, the distance between the lower guide holes is consistent with the distance between the outer cylinders in an outer cylinder assembly, and the distance between the inner cylinders in the turnover box is not equal to the distance between the outer cylinders in the outer cylinder assembly; the upper positioning plate and the lower positioning plate are oppositely arranged, two ends of the guide pipe are respectively connected with the upper guide hole and the lower guide hole, and the guide pipe, the upper guide hole and the lower guide hole are arranged in a one-to-one correspondence mode.
Preferably among the above technical scheme, the displacement subassembly still includes the location stand, the location stand set up in between last locating plate and the lower locating plate for fixed last locating plate and lower locating plate.
Preferably, in the above technical solution, the pitch-variable assembly further includes a substrate, the lower positioning plate is disposed on the substrate, and the substrate is provided with via holes corresponding to the lower guide holes one to one; the variable pitch assembly is detachably arranged on the rack through the substrate.
Use the technical scheme of the utility model, following beneficial effect has:
(1) the variable pitch assembly of the utility model solves the problem that the original equipment can not meet the requirement of cylinder combination after the variable pitch of the firework outer cylinder is realized through the variable pitch assembly, the space between the upper guide holes on the upper positioning plate is consistent with the space between the inner cylinders in the transfer box, the space between the lower guide holes on the lower positioning plate is consistent with the space between the outer cylinders in the outer cylinder assembly, and the problem that the cylinder combination can not be realized due to the inconsistent space between the inner cylinders in the transfer box and the space between the outer cylinders in the outer cylinder assembly is solved; only need change the displacement subassembly on primary equipment and can satisfy different displacement demands, need not to change whole equipment after the urceolus takes place the displacement, greatly reduced the cost, practiced thrift the time of equipment change, improved production efficiency.
The utility model also provides a variable pitch fireworks equipment closes a section of thick bamboo machine, including pushing away inner tube mechanism, turnover case and foretell displacement subassembly, push away inner tube mechanism and displacement subassembly set up respectively in the both sides of turnover case, push away the inner tube mechanism and be arranged in pushing away the displacement subassembly with the inner tube in the turnover case, the one end that the turnover case was kept away from to the displacement subassembly is equipped with the urceolus subassembly, realizes packing into the urceolus with the inner tube in the turnover case through the displacement subassembly.
Preferred among the above technical scheme, the turnover case is including taking out the board valve, going up orifice plate and orifice plate down, take out the board valve activity and set up between last orifice plate and orifice plate down, take out all to be equipped with the via hole on board valve, last orifice plate and the orifice plate down, realize the inner tube through the via hole dislocation of the via hole of taking out the board valve and going up the orifice plate and deposit in the orifice plate, the via hole through taking out the board valve aligns with the via hole of last orifice plate and realizes that the inner tube gets into the displacement subassembly behind the via hole of orifice plate down.
Preferably, in the above technical solution, the inner diameter of the end of the via hole on the lower orifice plate is gradually reduced.
Preferred among the above technical scheme, the turnover case still includes guiding mechanism, guiding mechanism includes mount pad, second linear bearing and optical axis, the mount pad set up in take out on the board valve, second linear bearing set up in on the mount pad, the optical axis set up in on the last orifice plate, and the optical axis runs through second linear bearing sets up, leads through the motion of optical axis and second linear bearing to taking out the board valve.
Preferably, in the above technical solution, the guide mechanism further includes an elastic member, the elastic member is sleeved on the optical axis, and two ends of the elastic member are respectively contacted with the mounting seat and the upper orifice plate; the power extensible member on the frame stretches out to push the through hole on the plate drawing valve to align with the through hole on the upper hole plate, and the through hole on the plate drawing valve and the through hole on the upper hole plate are staggered in the operation process of the turnover box through the elastic member.
Preferably, in the above technical scheme, the inner cylinder pushing mechanism comprises a lower plug telescopic part, an upper beam, a guide post, a middle beam and a lower beam, the upper beam and the lower beam are oppositely arranged, the guide post is arranged between the upper beam and the lower beam, the middle beam is movably arranged on the guide post through a first linear bearing, the lower plug telescopic part is arranged on the upper beam, a piston rod of the lower plug telescopic part is connected with the middle beam, and the middle beam moves along the guide post by extending or retracting the lower plug telescopic part; the middle beam is provided with plug rods, the plug rods are arranged in one-to-one correspondence with the through holes in the upper hole plate, and the inner cylinder in the turnover box is pushed into the variable pitch assembly through the plug rods;
the lower beam is provided with a guide rail, the turnover box is provided with a sliding block, and the turnover box is movably arranged on the guide rail through the sliding block, so that the inner barrel is transported.
Preferably, in the above technical scheme, the plug rod is made of a flexible material, and the plug rod is inserted into the conduit and deforms along with the shape of the conduit, so that the inner cylinder in the variable pitch assembly is pushed into the outer cylinder.
Use the technical scheme of the utility model, following beneficial effect has:
(1) the utility model discloses a variable pitch fireworks equipment closes a section of thick bamboo machine can realize automatic combination section of thick bamboo (be about to the inner tube and pack into the urceolus) through pushing away inner tube mechanism, turnover case and displacement subassembly, need not artificial intervention, great reduction the human cost, improved production efficiency.
(2) The utility model discloses a variable pitch fireworks equipment closes a section of thick bamboo machine, the internal diameter of via hole end reduces gradually on the lower orifice plate, and it is littleer to be close to the displacement subassembly internal diameter more promptly, and this kind of design makes things convenient for the cock stem to push into the displacement subassembly with the inner tube, can not produce the phenomenon of a card section of thick bamboo in the butt joint position of turnover case and displacement subassembly, guarantees the smoothness of technology and goes on.
(3) The utility model discloses a flexible piece is established to variable-pitch fireworks equipment combination section of thick bamboo machine cover on the optical axis, guarantees that the turnover case is taken out the via hole of board valve and is staggered with the via hole of last orifice plate at the moving in-process, prevents the condition that the inner tube dropped.
(4) The variable-pitch firework cylinder assembling machine has the advantages that the plug rod is made of flexible materials and can deform, so that the plug rod can change along with the shape of the guide pipe when entering the guide pipe, and the inner cylinder is pushed into the outer cylinder; through experimental discovery, the stopper rod adopts flexible material cooperation displacement subassembly can realize 30 mm's displacement by the biggest, under the condition that the positional deviation of upper guide hole and lower guide hole does not exceed 30mm promptly, all can realize pushing the inner tube into the urceolus, satisfies fireworks urceolus specification change's demand basically.
In addition to the above-described objects, features and advantages, the present invention has other objects, features and advantages. The present invention will be described in further detail with reference to the drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification. In the drawings:
FIG. 1 is a schematic view of the overall structure of the variable-pitch firework cylinder assembling machine of the present invention;
FIG. 2 is a top plan view of the transfer case of FIG. 1 (including the power assembly);
FIG. 3 is an isometric view of the transfer case of FIG. 1;
FIG. 4 is an enlarged view of a portion of FIG. 3 at A;
FIG. 5 is a cross-sectional view of the upper orifice plate, the lower orifice plate, and the extraction valve;
FIG. 6 is an isometric view of a pitch assembly;
FIG. 7 is a cross-sectional view of the pitch assembly;
the device comprises a lower plug telescopic piece 1, a lower plug telescopic piece 2, an upper beam 3, a guide post 4, a middle beam 5, a first linear bearing 6, a plug rod 7, a lower beam 8, a sliding block 9, a turnover box 9.1, a power telescopic piece 9.2, a power telescopic piece piston rod 9.3, a plate drawing valve 9.4, an upper hole plate 9.5, a lower hole plate 9.6, a guide mechanism 9.6.1, an elastic piece 9.6.2, a mounting seat 9.6.3, a second linear bearing 9.6.4, an optical axis 10, a guide rail 11, a side distance assembly 11.1, an upper positioning plate 11.2, a positioning upright post 11.3, a base plate 11.4, a lower positioning plate 11.5, a guide pipe 12, an inner cylinder, a 13, an outer cylinder 14 and a rack.
Detailed Description
The embodiments of the invention will be described in detail hereinafter with reference to the accompanying drawings, but the invention can be implemented in many different ways, which are defined and covered by the claims.
Example 1:
referring to fig. 1-7, a variable-pitch firework cylinder assembling machine comprises an inner cylinder pushing mechanism, a turnover box 9 and a variable-pitch assembly 11, wherein the inner cylinder pushing mechanism and the variable-pitch assembly 11 are respectively arranged on two sides of the turnover box 9, the inner cylinder pushing mechanism is used for pushing an inner cylinder 12 in the turnover box 9 into the variable-pitch assembly 11, an outer cylinder assembly is arranged at one end, far away from the turnover box 9, of the variable-pitch assembly 11, the distance between the inner cylinders in the turnover box 9 is not equal to the distance between the outer cylinders 13 in the outer cylinder assembly, and the inner cylinder 12 in the turnover box 9 is loaded into the outer cylinder 13 through the variable-pitch assembly 11.
Preferably, the outer barrel assembly comprises an outer barrel frame and a plurality of outer barrels arranged on the outer barrel frame.
Referring to fig. 6 to 7, the pitch-variable assembly 11 includes an upper positioning plate 11.1, a lower positioning plate 11.4 and a guide tube 11.5, the upper positioning plate 11.1 is uniformly provided with upper guide holes, the space between the upper guide holes is consistent with the space between the inner cylinders in the turnover box 9, the lower positioning plate 11.4 is uniformly provided with lower guide holes, the space between the lower guide holes is consistent with the space between the outer cylinders in the outer cylinder assembly, the upper positioning plate 11.1 and the lower positioning plate 11.4 are oppositely arranged, two ends of the guide tube 11.5 are respectively connected with the upper guide holes and the lower guide holes, and the guide tube 11.5, the upper guide holes and the lower guide holes are correspondingly arranged one by one.
Preferably, the conduit is made of a PVC transparent material.
The pitch-changing assembly 11 further comprises a positioning upright post 11.2, and the positioning upright post 11.2 is arranged between the upper positioning plate 11.1 and the lower positioning plate 11.4 and used for fixing the upper positioning plate 11.1 and the lower positioning plate 11.4.
The pitch-variable assembly 11 further comprises a substrate 11.3, the lower positioning plate 11.4 is arranged on the substrate 11.3, and the substrate 11.3 is provided with through holes corresponding to the lower guide holes one to one; the pitch assembly 11 is detachably mounted on a frame 14 (the frame is not shown, and only a part of the frame is illustrated in fig. 2, and a person skilled in the art can design the frame structure according to actual situations) through a base plate 11.3.
Referring to fig. 3 and 5, turnover case 9 is including taking out board valve 9.3, last orifice plate 9.4 and lower orifice plate 9.5, take out board valve 9.3 activity and set up between last orifice plate and lower orifice plate, it all is equipped with the via hole on board valve 9.3, last orifice plate and lower orifice plate 9.5 to take out, the via hole on the last orifice plate corresponds the setting with the via hole on the lower orifice plate, realizes through the via hole dislocation of taking out board valve 9.3 and last orifice plate that inner tube 12 deposits in the orifice plate, and the via hole through taking out board valve 9.3 aligns with the via hole of last orifice plate and realizes that inner tube 12 gets into the displacement subassembly behind the via hole of orifice plate down.
Preferably, the inner diameter of the end of the through hole on the lower hole plate is gradually reduced, namely, the inner diameter is smaller as the lower hole plate is closer to the pitch changing assembly.
Referring to fig. 4, the turnover box 9 further includes a guiding mechanism, the guiding mechanism includes a mounting seat 9.6.2, a second linear bearing 9.6.3 and an optical axis 9.6.4, the mounting seat 9.6.2 is disposed on the drawer valve 9.3, the second linear bearing 9.6.3 is disposed on the mounting seat 9.6.2, the optical axis 9.6.4 is disposed on the upper hole plate, and the optical axis 9.6.4 penetrates through the second linear bearing 9.6.3, so as to guide the movement of the drawer valve 9.3 through the optical axis and the second linear bearing.
The guide mechanism further comprises an elastic piece 9.6.1, the optical axis 9.6.4 is sleeved with the elastic piece 9.6.1, and two ends of the elastic piece are respectively contacted with the mounting seat and the upper orifice plate; referring to fig. 2, the power expansion piece 9.1 on the frame 14 extends out to push the through hole on the drawer valve to align with the through hole on the upper orifice plate (i.e. the power expansion piece piston rod 9.2 pushes the drawer valve), and the elastic piece 9.6.1 is used to realize the dislocation between the through hole on the drawer valve and the through hole on the upper orifice plate during the operation of the turnover box 9.
Preferably, the power expansion part is a cylinder, and the elastic part is a spring. The turnover case can not contact with the power extensible member at the in-process of transporting, realizes taking out the via hole of board valve and the via hole dislocation of last orifice plate through the elasticity of elastic component, and when the turnover case moved to closing a section of thick bamboo position department (push away inner tube mechanism promptly under), the power extensible member stretched out and can contact and take out the board valve to make the elastic component pressurized, take out the via hole of board valve and the via hole alignment of last orifice plate.
The inner cylinder pushing mechanism comprises a lower plug telescopic part 1, an upper beam 2, a guide post 3, a middle beam 4 and a lower beam 7, wherein the upper beam 2 and the lower beam 7 are oppositely arranged, the guide post 3 is arranged between the upper beam 2 and the lower beam 7, the middle beam 4 is movably arranged on the guide post 3 through a first linear bearing, the lower plug telescopic part 1 is arranged on the upper beam 2, a piston rod of the lower plug telescopic part is connected with the middle beam 4, and the middle beam 4 moves along the guide post 3 by extending or retracting the lower plug telescopic part 1; be equipped with cock stem 6 on the center sill 4, cock stem 6 sets up with the via hole one-to-one on the last orifice plate, realizes pushing the inner tube in the turnover case into the displacement subassembly through cock stem 6.
The lower beam 7 is provided with a guide rail 10, the turnover box 9 is provided with a slide block 8, and the turnover box 9 is movably arranged on the guide rail 10 through the slide block, so that the transportation inner cylinder 12 is realized. Please refer to the prior art for the driving mode of the turnover box moving on the guide rail, a motor can be used for driving.
Preferably, the lower plug telescopic piece is an air cylinder, and the inner cylinder pushing mechanism is arranged on the rack through a lower beam.
Preferably, the plug rod 6 is made of flexible materials, and the plug rod is inserted into the guide pipe and deforms along with the shape of the guide pipe, so that the inner cylinder in the variable-pitch component is pushed into the outer cylinder. The flexible material includes but is not limited to one of polyurethane stick, silica gel stick, rubber stick or direction flexible axle.
The technical scheme of the embodiment is specifically as follows:
the variable-pitch firework assembling and tube combining machine is generally applied to a firework assembling production line, an inner tube is conveyed to a tube combining position through a turnover box, a power telescopic piece stretches out to achieve alignment of a drawing plate valve via hole and an upper hole plate via hole, a lower plug telescopic piece stretches out, a plug rod pushes the inner tube to a variable-pitch assembly, and the inner tube and the outer tube are combined.
The variable pitch subassembly of multiple specification can be designed to this embodiment, to different product specification demands, only need to change the variable pitch subassembly can, reduce the adjustment of other equipment behind the firecracker urceolus displacement.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A variable pitch assembly is characterized in that the variable pitch assembly (11) comprises an upper positioning plate (11.1), a lower positioning plate (11.4) and a guide pipe (11.5), wherein upper guide holes are uniformly distributed in the upper positioning plate (11.1), the distance between the upper guide holes is consistent with the distance between inner cylinders in a turnover box (9), lower guide holes are uniformly distributed in the lower positioning plate (11.4), the distance between the lower guide holes is consistent with the distance between outer cylinders in an outer cylinder assembly, and the distance between the inner cylinders in the turnover box (9) is not equal to the distance between the outer cylinders (13) in the outer cylinder assembly; the upper positioning plate (11.1) and the lower positioning plate (11.4) are arranged oppositely, two ends of the guide pipe (11.5) are respectively connected with the upper guide hole and the lower guide hole, and the guide pipe (11.5), the upper guide hole and the lower guide hole are arranged in a one-to-one correspondence manner.
2. The pitch assembly according to claim 1, wherein the pitch assembly (11) further comprises a positioning upright (11.2), the positioning upright (11.2) being arranged between the upper positioning plate (11.1) and the lower positioning plate (11.4) for fixing the upper positioning plate (11.1) and the lower positioning plate (11.4).
3. The pitch change assembly according to claim 2, wherein the pitch change assembly (11) further comprises a base plate (11.3), the lower positioning plate (11.4) is arranged on the base plate (11.3), and the base plate (11.3) is provided with through holes corresponding to the lower guide holes one by one; the variable pitch assembly (11) is detachably arranged on the rack through a base plate (11.3).
4. The variable-pitch firework cylinder assembling machine is characterized by comprising an inner cylinder pushing mechanism, a turnover box (9) and a variable-pitch assembly (11) according to any one of claims 1 to 3, wherein the inner cylinder pushing mechanism and the variable-pitch assembly (11) are respectively arranged on two sides of the turnover box (9), the inner cylinder pushing mechanism is used for pushing an inner cylinder (12) in the turnover box (9) into the variable-pitch assembly (11), an outer cylinder assembly is arranged at one end, far away from the turnover box (9), of the variable-pitch assembly (11), and the inner cylinder (12) in the turnover box (9) is filled into an outer cylinder (13) through the variable-pitch assembly (11).
5. The variable-pitch firework assembling and cylinder assembling machine according to claim 4, wherein the turnover box (9) comprises a drawing plate valve (9.3), an upper hole plate (9.4) and a lower hole plate (9.5), the drawing plate valve (9.3) is movably arranged between the upper hole plate and the lower hole plate, through holes are formed in the drawing plate valve (9.3), the upper hole plate (9.4) and the lower hole plate (9.5), the inner cylinder (12) is stored in the upper hole plate through the dislocation of the through holes of the drawing plate valve (9.3) and the upper hole plate, and the inner cylinder (12) enters the variable-pitch assembly through the through holes of the lower hole plate after the through holes of the lower hole plate are aligned through the through holes of the drawing plate valve (9.3) and the upper hole plate.
6. The variable-pitch firework assembling and barreling machine as claimed in claim 5, wherein the inner diameter of the end of the through hole on the lower orifice plate is gradually reduced.
7. The variable-pitch firework assembling and tube combining machine is characterized in that the turnover box (9) further comprises a guide mechanism, the guide mechanism comprises a mounting seat (9.6.2), a second linear bearing (9.6.3) and an optical axis (9.6.4), the mounting seat (9.6.2) is arranged on the drawing plate valve (9.3), the second linear bearing (9.6.3) is arranged on the mounting seat (9.6.2), the optical axis (9.6.4) is arranged on the upper hole plate, the optical axis (9.6.4) penetrates through the second linear bearing (9.6.3) and guides the movement of the drawing plate valve (9.3) through the optical axis and the second linear bearing.
8. The variable-pitch firework assembling and tube-assembling machine as claimed in claim 7, wherein the guiding mechanism further comprises an elastic member (9.6.1), the elastic member (9.6.1) is sleeved on the optical axis (9.6.4) and two ends of the elastic member are respectively in contact with the mounting seat and the upper orifice plate; the through hole on the board valve is taken out in the promotion through power extensible member (9.1) on frame (14) stretches out and aligns with the through hole on the last orifice plate, takes out the through hole dislocation on the board valve and the through hole on the last orifice plate in the realization turnover case (9) operation in-process through elastic component (9.6.1).
9. The variable-distance firework assembling and cylinder combining machine is characterized in that the inner cylinder pushing mechanism comprises a lower plug telescopic piece (1), an upper beam (2), a guide column (3), a middle beam (4) and a lower beam (7), the upper beam (2) and the lower beam (7) are oppositely arranged, the guide column (3) is arranged between the upper beam and the lower beam, the middle beam (4) is movably arranged on the guide column (3) through a first linear bearing (5), the lower plug telescopic piece (1) is arranged on the upper beam (2), a piston rod of the lower plug telescopic piece is connected with the middle beam (4), and the middle beam (4) moves along the guide column (3) through extension or retraction of the lower plug telescopic piece (1); the middle beam (4) is provided with plug rods (6), the plug rods (6) are arranged in one-to-one correspondence with the via holes in the upper hole plate, and the plug rods (6) are used for pushing the inner cylinder in the turnover box into the variable pitch assembly;
be equipped with guide rail (10) on underbeam (7), be equipped with slider (8) on turnover case (9), realize turnover case (9) activity through the slider and set up on guide rail (10) to realize transporting inner tube (12).
10. The variable-pitch firework assembling barrel machine as claimed in claim 9, wherein the plug rod (6) is made of flexible materials, and the plug rod is inserted into the guide pipe and deforms along with the shape of the guide pipe, so that an inner barrel in the variable-pitch assembly is pushed into an outer barrel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020992038.2U CN212778906U (en) | 2020-06-03 | 2020-06-03 | Variable-pitch assembly and variable-pitch firework assembling barrel machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020992038.2U CN212778906U (en) | 2020-06-03 | 2020-06-03 | Variable-pitch assembly and variable-pitch firework assembling barrel machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212778906U true CN212778906U (en) | 2021-03-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020992038.2U Active CN212778906U (en) | 2020-06-03 | 2020-06-03 | Variable-pitch assembly and variable-pitch firework assembling barrel machine |
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| Country | Link |
|---|---|
| CN (1) | CN212778906U (en) |
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2020
- 2020-06-03 CN CN202020992038.2U patent/CN212778906U/en active Active
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