A device for quickly replacing cutting tools of a dicing machine

By designing a dicing machine tool quick replacement device including a rotating cylinder, a movable seat, an adjustment assembly and a limit column, the problems of inconvenient tool installation and disassembly and safety hazards in the existing technology are solved, and the tool can be quickly installed and disassembled and the operational safety is improved.

CN117140759BActive Publication Date: 2025-09-09安徽积芯微电子科技有限公司
View PDF 7 Cites 0 Cited by

Patent Information

Application Number
CN202311265858.6
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-09-27
Publication Date
2025-09-09
Estimated Expiration
2043-09-27

AI Technical Summary

Technical Problem

The existing dicing machine tools are difficult to install and disassemble, and lack effective protective measures, which increases the safety risks of operation.

Method used

A quick-changing device for dicing machine tools is designed, which includes a rotating cylinder, a movable seat, an adjustment component and a limit column. The tilt state of the tool can be achieved through the adjustment component, which is convenient for observation and maintenance, and the operation safety is improved through the limit column and the support protective plate.

Benefits of technology

The tool can be quickly installed and disassembled, which improves the safety and convenience of operation and reduces potential safety hazards.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN117140759B_ABST
    Figure CN117140759B_ABST
Patent Text Reader

Abstract

The present invention discloses a device for quickly replacing saw blades, comprising a rotating cylinder, wherein a movable seat is movably provided inside the rotating cylinder; an adjustment assembly is provided on the movable seat, and the adjustment assembly is used to adjust the movable seat to move along the axis of the rotating cylinder; a fixed sleeve is hinged at one end of the movable seat, and the fixed sleeve is adapted to the rotating cylinder; the tool to be installed is provided at the end of the fixed sleeve away from the movable seat and is fixed by a limiting column; the limiting column is detachably provided on the fixed sleeve, and the limiting column is composed of a coaxially arranged end plate and a rod portion, the rod portion is passed through the interior of the tool to be installed and the fixed sleeve, and the end plate is used to abut against the end face of the tool to be installed. The present invention facilitates the rapid installation and removal of the tool and improves the safety of operation.
Need to check novelty before this filing date? Find Prior Art

Description

Technical Field

[0001] The present invention relates to the technical field of semiconductor chips, and in particular to a device for quickly replacing cutting tools of a dicing machine. Background Art

[0002] During the manufacturing process of semiconductor chips, a dicing machine is often required to cut the product. Since the dicing machine's blades are constantly worn during the cutting process, they need to be replaced promptly to reduce poor cutting quality. Existing dicing machine blades are often fixed with clamping or locking devices, allowing the blades to be set vertically. During the installation and removal process, the blades are tilted and difficult to flip, making inspection, installation, and other operations inconvenient. Furthermore, the lack of blade protection during installation and removal increases operational safety risks. Summary of the Invention

[0003] The purpose of the present invention is to provide a device for quickly replacing cutting tools of a dicing machine, which facilitates the rapid installation and removal of cutting tools and improves the safety of operation.

[0004] In order to solve the above technical problems, the present invention provides the following technical solutions: a dicing machine tool quick replacement device, comprising a rotating cylinder, a movable seat movably provided inside the rotating cylinder; an adjustment component is provided on the movable seat, and the adjustment component is used to adjust the movable seat to move along the axis of the rotating cylinder; a fixed sleeve is hinged at one end of the movable seat, and the fixed sleeve is adapted to the rotating cylinder; the tool to be installed is provided at the end of the fixed sleeve away from the movable seat, and is fixed by a limiting column; the limiting column is detachably provided on the fixed sleeve.

[0005] Furthermore, the limiting column is composed of a coaxially arranged end plate and a rod portion, the rod portion is passed through the interior of the tool to be installed and the fixed sleeve, and the end plate is used to abut against the end face of the tool to be installed.

[0006] Furthermore, at least two limiting studs are provided at one end of the rod away from the end plate, and each of the limiting studs penetrates the end of the fixing sleeve and is sleeved with a limiting nut adapted thereto.

[0007] Furthermore, it also includes a supporting protective plate, which is used to cover the outside of the tool; a magnet plate is provided on the supporting protective plate, and a limiting hole is provided on the rod portion, the limiting hole is adapted to the magnet plate, and the magnet plate is used to pass through the limiting hole and to be attracted to the end plate.

[0008] Furthermore, a mounting hole and a mounting groove are provided inside the fixed sleeve, the mounting hole is connected to the mounting groove, and the mounting groove passes through the inner wall of the fixed sleeve; a fixing frame adapted to it is provided inside the mounting groove, and a rotating shaft is rotatably provided inside the fixed frame; a pulley is provided on the rotating shaft, and a part of the pulley extends out of the fixed frame; a support rod is provided at one end of the fixed frame close to the mounting hole, and a spring is provided on the outside of the support rod; the spring is provided inside the mounting hole, and the two ends of the spring are respectively connected to the fixing sleeve and the fixed frame.

[0009] Furthermore, a circular clamping groove is provided on the outside of the rod portion, and the circular clamping groove is adapted to the pulley; and when the positions of the circular clamping groove and the pulley correspond, the pulley is used to be clamped inside the circular clamping groove.

[0010] Furthermore, the adjustment component includes an adjusting screw, which is passed through the movable seat and is connected to the movable seat through threaded cooperation; the adjustment component also includes a support limit seat, which is arranged inside the rotating cylinder; one end of the adjusting screw is rotatably set on the support limit seat, and the other end of the adjusting screw is rotatably set on the rotating cylinder, and penetrates the outer wall of the rotating cylinder and is connected to an adjusting handwheel.

[0011] Furthermore, a slide groove is provided on an outer wall of one side of the movable seat, and a slide bar adapted to the slide groove is provided inside the slide groove, and the slide bar is provided inside the rotating cylinder.

[0012] Furthermore, a retaining ring is provided on the end of the rotating cylinder close to the tool, and a conical hole and a straight hole are coaxially arranged inside the retaining ring; the straight hole is connected to the conical hole, and the straight hole and the conical hole pass through both ends of the retaining ring respectively; the straight hole is equal to the inner diameter of the rotating cylinder and is connected to the interior of the rotating cylinder; the diameter of one end of the conical hole connected to the straight hole is equal to the diameter of the straight hole, and the diameter of the end of the conical hole away from the straight hole is larger than the diameter of the end of the conical hole close to the straight hole.

[0013] Compared with the prior art, the present invention has the following beneficial effects.

[0014] 1. By adjusting the movable seat through the adjustment component, the tool can be deflected from the vertical direction to an inclined state, which is convenient for better observation and detection of the tool, thereby facilitating the inspection or cleaning of the tool.

[0015] 2. When the fixed sleeve, tool, etc. are tilted, the limit column slides down from the inside of the fixed sleeve due to gravity, and when the circular groove corresponds to the position of the pulley, the pulley is clamped inside the circular groove to fix the limit column and prevent the limit column from continuing to slide down, thereby preventing the tool from falling directly with the limit column.

[0016] 3. A support and protection plate is also provided, which is installed and matched with the limit column to improve the safety of tool installation and disassembly operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0019] Figure 2 It is a schematic diagram of the overall cross-sectional structure of the present invention.

[0020] Figure 3 It is a schematic diagram of the tilted state of the fixed sleeve and the tool of the present invention.

[0021] Figure 4 It is a structural schematic diagram of the supporting protective plate of the present invention.

[0022] Figure 5 It is a schematic diagram of the installation of the support rod, spring and pulley of the present invention.

[0023] Figure 6 It is a structural schematic diagram of the retaining ring of the present invention.

[0024] In the figure: 1. Rotating cylinder; 11. Slide bar; 12. Connecting shaft; 2. Fixed sleeve; 21. Mounting hole; 22. Mounting slot; 3. Adjusting assembly; 31. Adjusting screw; 32. Support limit seat; 33. Adjusting handwheel; 4. Retaining ring; 41. Cone hole; 42. Straight hole; 5. Support protective plate; 51. Magnet plate; 6. Moving seat; 61. Slide slot; 7. Limiting column; 71. Rod; 711. Limiting hole; 712. Circular ring slot; 72. End plate; 8. Fixed frame; 81. Pulley; 82. Support rod; 83. Spring; 84. Rotating shaft; 9. Limiting stud; 91. Limiting nut. DETAILED DESCRIPTION

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] See also Figures 1-6The present invention provides a technical solution: a dicing machine tool quick replacement device, comprising a rotating cylinder 1, a movable seat 6 is movably provided inside the rotating cylinder 1; a portion of the outer wall of the movable seat 6 is set as a circular arc surface, and the circular ring surface just fits the inner wall of the rotating cylinder 1; in addition, a slide groove 61 is provided on the movable seat 6, the slide groove 61 extends to the circular arc surface, and a slide bar 11 adapted to it is provided in the slide groove 61, and the slide groove 61 and the slide bar 11 are arranged parallel to the axis of the rotating cylinder 1, that is, the movable seat 6 can be moved along the axis direction of the rotating cylinder 1; an adjustment component 3 is provided on the movable seat 6, and the adjustment component 3 is used to adjust the movable seat 6 to move along the axis direction of the rotating cylinder 1.

[0027] The adjusting assembly 3 includes an adjusting screw rod 31, which is passed through the movable seat 6 and is connected to the movable seat 6 by threaded cooperation; a support and limit seat 32 is provided inside the rotating cylinder 1, one end of the adjusting screw rod 31 is rotatably set on the support and limit seat 32, and the other end of the adjusting screw rod 31 is rotatably set on the rotating cylinder 1 and penetrates the outer wall of the rotating cylinder 1 and is connected to an adjusting handwheel 33; that is, by rotating the adjusting handwheel 33, the rotation of the adjusting screw rod 31 is driven, and the movement of the movable seat 6 is realized due to the action of the slide groove 61 and the slide bar 11.

[0028] A fixed sleeve 2 is hinged at one end of the movable seat 6, and the fixed sleeve 2 is adapted to the rotating cylinder 1, that is, the fixed sleeve 2 and the rotating cylinder 1 are coaxially arranged; the tool to be installed (that is, the dicing machine tool) is arranged at the end of the fixed sleeve 2 away from the movable seat 6, and the tool is fixed by a limiting column 7.

[0029] The limiting column 7 can be detachably arranged on the fixed sleeve 2; specifically, the limiting column 7 is composed of a coaxially arranged end plate 72 and a rod portion 71, and the end plate 72 and the rod portion 71 can adopt an integrally formed structure; the rod portion 71 is passed through the interior of the tool to be installed and the fixed sleeve 2, and the end plate 72 is used to abut against the end face of the tool to be installed.

[0030] At least two limiting studs 9 are provided at one end of the rod 71 away from the end plate 72; Figure 2 There are two limit studs 9, and the axes of the two limit studs 9 are not coaxial with the rod 71; the two limit studs 9 respectively penetrate the end of the fixed sleeve 2 and are provided with a limit nut 91 adapted thereto, and the limit nut 91 cooperates with the limit stud 9, and one side of the limit nut 91 is pressed against the end surface of the fixed sleeve 2 away from the tool, thereby fixing the limit column 7, and then clamping the tool to the end of the fixed sleeve 2; at the same time, the dicing machine tool is coaxially arranged with the rotating cylinder 1.

[0031] A retaining ring 4 is provided on the end of the rotating cylinder 1 near the tool, and a conical hole 41 and a straight hole 42 are coaxially arranged inside the retaining ring 4; the straight hole 42 is connected to the conical hole 41, and the straight hole 42 and the conical hole 41 pass through both ends of the retaining ring 4 respectively; the straight hole 42 corresponds to the inner diameter position of the rotating cylinder 1 and has the same diameter, and the straight hole 42 is connected to the interior of the rotating cylinder 1; the diameter of the end of the conical hole 41 connected to the straight hole 42 is equal to the diameter of the straight hole 42, and the diameter of the end of the conical hole 41 away from the straight hole 42 is larger than the diameter of the end of the conical hole 41 close to the straight hole 42, and an arc chamfer is provided on the end of the conical hole 41 connected to the straight hole 42; specifically, the taper of the conical hole 41 can be set to 40-50 degrees.

[0032] The rotating cylinder 1 is used to connect to an external drive motor. Specifically, a connecting shaft 12 is connected to the rotating cylinder 1. The connecting shaft 12 is coaxial with the rotating cylinder 1. The connecting shaft 12 can be connected to the external drive motor through a bearing seat, etc., to drive the rotating seat to rotate around the axis of the rotating shaft 84, thereby driving the tool to rotate around its own axis.

[0033] Since the adjustment assembly 3 can be used to adjust the movable seat 6 to move along the axis of the rotating cylinder 1, when the movable seat 6 moves toward the direction close to the tool, the movable seat 6 pushes the fixed sleeve 2 to move toward the tool, and the output shaft of the external drive motor is usually able to rotate by external force when not started (that is, the output shaft is not self-locking). Therefore, when the end of the fixed sleeve 2 away from the movable seat 6 enters the inside of the truncated cone hole 41, relying on the action of gravity and the articulation, the fixed sleeve 2 deflects downward, and the fixed sleeve 2 is supported by the truncated cone hole 41, that is, Figure 3 The state shown; thereby realizing that the tool is deflected from the vertical direction to the inclined state, at this time it is convenient to better observe and detect the tool, thereby facilitating the inspection or cleaning of the tool.

[0034] Since the limiting column 7 is fixed by the limiting nut 91 and the limiting stud 9; when the end of the fixed sleeve 2 moves away from the movable seat 6 and enters the inside of the conical hole 41, that is, when the fixed sleeve 2 is tilted, the limiting nut 91 is exposed at this time, which also facilitates the rotation and disassembly of the limiting nut 91. When the fixed sleeve 2 is located inside the rotating cylinder 1, the limiting nut 91 is located inside the rotating cylinder 1, which also avoids misoperation of the limiting nut 91; after all the limiting nuts 91 are removed, the rod 71 can slide out of the fixed sleeve 2 by relying on gravity, which greatly facilitates the disassembly operation of the tool.

[0035] In addition, a mounting hole 21 and a mounting groove 22 are provided inside the fixed sleeve 2, the mounting hole 21 is connected to the mounting groove 22, and the mounting groove 22 passes through the inner wall of the fixed sleeve 2; the number of the mounting holes 21 and the mounting groove 22 is set to two, and the two mounting holes 21 and the two mounting grooves 22 are symmetrically arranged on both sides of the axis of the fixed sleeve 2; a fixed frame 8 adapted to it is provided inside the mounting groove 22, and the fixed frame 8 can move along the mounting groove 22; a rotating shaft 84 is movably provided inside the fixed frame 8 through a bearing, and a pulley 81 is sleeved on the rotating shaft 84, and a part of the pulley 81 extends out of the fixed frame 8.

[0036] A support rod 82 is provided at one end of the fixing frame 8 near the mounting hole 21, and a spring 83 is sleeved on the outside of the support rod 82; the spring 83 is provided inside the mounting hole 21, and the two ends of the spring 83 are respectively connected to the fixing sleeve 2 and the fixing frame 8; and a circular groove 712 is provided on the outside of the rod portion 71, and the circular groove 712 is adapted to the pulley 81, and when the circular groove 712 corresponds to the position of the pulley 81, the pulley 81 is used to be clamped inside the circular groove 712; that is, When the fixed sleeve 2 is in an inclined state, the limiting column 7 slides down from the inside of the fixed sleeve 2 under the action of gravity, and the annular groove 712 of the rod 71 corresponds to the position of the pulley 81, the pulley 81 is driven to move to the inside of the annular groove 712 under the action of the spring 83, that is, the pulley 81 is clamped in the annular groove 712 to fix the limiting column 7 and prevent the limiting column 7 from continuing to slide down. Through the above arrangement, the tool is prevented from falling directly following the limiting column 7.

[0037] Both ends of the circular groove 712 are provided with arc chamfers. Therefore, after the pulley 81 is clamped in the circular groove 712, the limit column 7 is pulled by applying tension, overcoming the pressure of the spring 83, and the pulley 81 can move along the circular groove 712 and move out from the inside of the circular groove 712. At this time, the pulley 81 is pressed against the outside of the rod 71, and the rod 71 can be completely moved out from the inside of the fixed sleeve 2; that is, it prevents the tool from falling directly when the fixed sleeve 2 is tilted, and the tool slides down a certain distance and stops continuing to slide down, thereby improving operational safety.

[0038] In order to further improve the safety of tool disassembly and installation, the present invention also provides a support and protection plate 5, which is used to cover the outside of the tool, and a magnet plate 51 with strong magnetism is provided on the support and protection plate 5; a limiting hole 711 is provided on the rod portion 71, and the limiting hole 711 is adapted to the magnet plate 51. When the support and protection plate 5 is arranged on the outside of the tool, and the magnet plate 51 is used to pass through the limiting hole 711, so that the magnet plate 51 is attracted and fixed on the end plate 72, the installation and fixation of the support and protection plate 5 can be achieved. Specifically, the rod portion 71 is made of a material that can be adsorbed by the magnet plate 51; after the support and protection plate 5 is installed, on the one hand, protection of the tool is achieved, and the safety during the disassembly process is improved; on the other hand, by holding the support and protection plate 5, it is convenient to apply force to pull the limiting column 7, so that the limiting column 7 is completely removed from the inside of the fixed sleeve 2. After the limiting column 7 is removed from the inside of the fixed sleeve 2, the tool can be quickly disassembled by removing the tool from the support and protection plate 5.

[0039] When the tool is installed, the supporting protective plate 5 can be installed on the limiting column 7, and then the tool to be installed is passed through the rod 71 and the end plate 72 is used to support the tool. Then, by holding the supporting protective plate 5 and passing the rod 71 inside the fixed sleeve 2, the fixed frame 8 is driven to move under the action of the spring 83 and drives a part of the pulley 81 to exceed the inner ring surface of the fixed sleeve 2. When one end of the rod 71 contacts the pulley 81, the pulley 81 is squeezed to move away from the rod 71, and when the annular groove 712 corresponds to the position of the pulley 81, the pulley 81 is clamped into the inside of the annular groove 712, and the rod 71 is continued to be pushed to move into the fixed sleeve 2, and the pulley 81 is squeezed out from the inside of the annular groove 712 ; Make the limiting stud 9 correspond to the position of the through hole at the end of the fixed sleeve 2, and continue to push the limiting column 7, so that one end of the limiting column 7 can be pressed against the inner wall of the fixed sleeve 2, and the limiting stud 9 penetrates the through hole, and by tightening the limiting nut 91 on the outside of the limiting stud 9, the limiting fixation of the limiting column 7 can be achieved, and the tool clamping and fixing can be achieved at the end of the fixed sleeve 2; then by rotating the adjusting handwheel 33, the movable seat 6 is driven to move away from the ring, and under the guidance of the frustum hole 41, the movable seat 6 drives the fixed sleeve 2 to re-enter the interior of the rotating cylinder 1, so as to achieve the limiting fixation of the fixed sleeve 2; finally, pull the supporting protective plate 5 to achieve the detachment of the supporting protective plate 5, which facilitates the rapid installation of the tool and improves the safety of the tool installation.

[0040] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or substitute equivalents for some of the technical features. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A dicing machine tool quick replacement device, characterized in that: It comprises a rotating cylinder (1), wherein a movable seat (6) is movably provided inside the rotating cylinder (1); An adjustment component (3) is provided on the movable seat (6), and the adjustment component (3) is used to adjust the movable seat (6) to move along the axis of the rotating cylinder (1); One end of the movable seat (6) is hingedly connected to a fixed sleeve (2), and the fixed sleeve (2) is adapted to the rotating cylinder (1); The tool to be installed is arranged at the end of the fixed sleeve (2) away from the movable seat (6) and is fixed in position by a limiting column (7); The limiting column (7) is detachably arranged on the fixed sleeve (2); The limiting column (7) is composed of a coaxially arranged end plate (72) and a rod (71), wherein the rod (71) is inserted into the interior of the tool to be installed and the fixed sleeve (2), and the end plate (72) is used to abut against the end surface of the tool to be installed; At least two limiting studs (9) are provided at one end of the rod (71) away from the end plate (72), and each limiting stud (9) penetrates the end of the fixing sleeve (2) and is sleeved with a limiting nut (91) adapted thereto. When disassembling the tool, after removing all the limit nuts (91), the rod (71) can slide off from the inside of the fixed sleeve (2) and detach due to gravity; The interior of the fixed sleeve (2) is provided with a mounting hole (21) and a mounting groove (22), the mounting hole (21) is connected to the mounting groove (22), and the mounting groove (22) passes through the inner wall of the fixed sleeve (2); A fixed frame (8) adapted thereto is provided inside the mounting groove (22), and a rotating shaft (84) is rotatably provided inside the fixed frame (8); a pulley (81) is sleeved on the rotating shaft (84), and a portion of the pulley (81) extends out of the fixed frame (8); A support rod (82) is provided at one end of the fixing frame (8) close to the mounting hole (21), and a spring (83) is sleeved on the outside of the support rod (82); The spring (83) is arranged inside the mounting hole (21), and two ends of the spring (83) are respectively connected to the fixing sleeve (2) and the fixing frame (8); A circular groove (712) is provided on the outside of the rod portion (71), and the circular groove (712) is adapted to fit the pulley (81); When the annular clamping groove (712) corresponds to the position of the pulley (81), the pulley (81) is used to be clamped inside the annular clamping groove (712).

2. The dicing machine tool quick replacement device according to claim 1, characterized in that: It also includes a support and protection plate (5), which is used to cover the outside of the tool; The support protection plate (5) is provided with a magnet plate (51), and the rod portion (71) is provided with a limiting hole (711), the limiting hole (711) is adapted to the magnet plate (51), and the magnet plate (51) is used to pass through the limiting hole (711) and to be attracted to the end plate (72).

3. The dicing machine tool quick replacement device according to claim 1, characterized in that: The adjusting assembly (3) includes an adjusting screw (31), the adjusting screw (31) is passed through the movable seat (6), and the adjusting screw (31) and the movable seat (6) are connected by threaded engagement; The adjustment assembly (3) further comprises a support and limit seat (32), and the support and limit seat (32) is arranged inside the rotating cylinder (1); One end of the adjusting screw rod (31) is rotatably mounted on the support limit seat (32), and the other end of the adjusting screw rod (31) is rotatably mounted on the rotating cylinder (1) and penetrates the outer wall of the rotating cylinder (1) to be connected to an adjusting hand wheel (33).

4. The dicing machine tool quick replacement device according to claim 1, characterized in that: A sliding groove (61) is provided on an outer wall of one side of the movable seat (6), and a sliding bar (11) adapted thereto is provided inside the sliding groove (61), and the sliding bar (11) is provided inside the rotating cylinder (1).

5. The dicing machine tool quick replacement device according to claim 1, characterized in that: The end of the rotating cylinder (1) close to the tool is sleeved with a retaining ring (4), and a truncated cone hole (41) and a straight hole (42) are coaxially arranged inside the retaining ring (4); The straight hole (42) is communicated with the truncated cone hole (41), and the straight hole (42) and the truncated cone hole (41) respectively pass through both ends of the retaining ring (4); The straight hole (42) has the same inner diameter as the rotating cylinder (1) and is connected to the interior of the rotating cylinder (1); The diameter of one end of the frustum hole (41) connected to the straight hole (42) is equal to the diameter of the straight hole (42), and the diameter of one end of the frustum hole (41) away from the straight hole (42) is larger than the diameter of one end of the frustum hole (41) close to the straight hole (42).

Citation Information

Patent Citations

  • Magnetic control intelligent sorting device of container lock pins and control method of magnetic control intelligent sorting device

    CN109292453A

  • Tool clamping mechanism, tool magazine and numerical control machine tool

    CN113500440A

  • Deviation correction connecting device of boiler barrel welding robot

    CN115922180A

  • Battery compartment structure and scooter with same

    CN116552685A

  • Cutting instrument

    CN205058111U