Multi-stage drill bit combination device for machining
By introducing limiting assembly and punching assembly into the multi-stage drill bit combination device, the rapid disassembly and precise adjustment of the drill bit is achieved by using the second electric push rod and hydraulic rod, the problem of difficulty in replacing and adjusting the drill bit in traditional devices is solved, and the problem of improved Work efficiency and processing accuracy.
Patent Information
- Application Number
- CN202411443676.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-16
- Publication Date
- 2024-12-17
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
Traditional multi-stage drill bit combination devices have difficulties in drill bit replacement and precise adjustment, which affects work efficiency and machining accuracy.
A multi-stage drill bit combination device including a limiting assembly, a punching assembly and a clamping assembly is designed to release the limit through the second electric push rod, quickly remove the drill bit, and use a scale ruler and a hydraulic rod to achieve accurate control of drill bit spacing. .
It realizes rapid replacement and precise adjustment of drill bits, improves work efficiency and processing quality, and adapts to different processing needs.
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Figure CN119140866A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of drilling devices, and in particular to a multi-stage drill assembly device for mechanical processing. Background Art
[0002] The multi-stage drill assembly device in mechanical processing refers to the combination of drills of different specifications or types to form a multifunctional drill system, which can complete a variety of processing tasks in one clamping process, such as pre-drilling, drilling, reaming, etc., and each drill inside it is precisely designed to maintain high processing accuracy during the processing and reduce error accumulation.
[0003] Although the traditional multi-stage drill bit combination device for mechanical processing can complete multiple processing tasks in one clamping process, most of the current drill bits are fixed with nuts to connect them to the rotating shaft. Although this method can firmly fix them on the rotating shaft, when the drill bit is damaged or needs to be installed and maintained, the disassembly work becomes more difficult. Moreover, if multiple different drill bits are needed in one clamping process, the drill bits need to be replaced multiple times. Although the multi-stage drill bit combination device can complete multiple processing tasks, it cannot fully cover all processing needs. Therefore, frequent replacement of drill bits will make drill bit replacement a burden, thereby affecting work efficiency. Summary of the invention
[0004] In order to solve the problems existing in the background technology, the present invention provides a multi-stage drill bit assembly device for mechanical processing that can adjust and quickly disassemble the drill bit and can accurately control the distance between the drill bits.
[0005] In view of the problems in the prior art, the present invention provides a multi-stage drill bit assembly device for mechanical processing, comprising an equipment main body, the limit assembly is installed at the upper end of the drill bit, the interior of the limit assembly comprises a limit block, a connecting column, a reset spring, an arc block, a second electric push rod and a limit box, the lower end of the limit block is fixedly connected to the upper end of the drill bit, a plurality of groups of mounting grooves are fixedly provided on the side wall of the limit block, the connecting column is fixedly installed inside the mounting groove on the side wall of the limit block, the reset spring is installed on the outer wall of the connecting column, the arc block is rotatably connected to the outer wall of the connecting column, a limit hole is provided at the upper end of the arc block, the output shaft of the second electric push rod is slidably connected to the limit hole provided at the upper end of the arc block, the second electric push rod is fixedly installed at the upper end of the partition inside the limit box, the upper end of the limit box is fixedly connected to the lower end of the connecting column, a partition is provided inside the limit box, and a plurality of groups of sliding openings are provided on the inner wall of the partition inside the limit box.
[0006] Specifically, a plurality of punching assemblies are installed on the main body of the equipment, and the interior of the punching assembly includes a mounting frame, a motor, a second set of rods, a hydraulic rod, a connecting plate, a connecting disk, a transmission shaft, a transmission belt, a connecting column and a drill bit. The mounting frame is slidably installed inside the slide groove, and a group of motors are fixedly installed on the upper end of the mounting frame. The output shaft of the motor is fixedly connected to the upper end of the second set of rods, and the second set of rods is rotatably connected to the inside of the connecting plate. The upper end of the connecting plate is fixedly connected to the output shaft of the hydraulic rod, and the base of the hydraulic rod is fixedly connected to the lower end side wall of the mounting frame.
[0007] Specifically, the lower end of the second set of rods is rotatably connected to the upper end of the connecting plate, the lower end of the connecting plate is fixedly connected to a group of transmission shafts, two groups of transmission belts are coupled to the transmission shafts, one end of each group of transmission belts is coupled to a group of connecting columns, the upper ends of the connecting columns are rotatably connected to the lower end of the connecting plate, the lower ends of the connecting columns are fixedly connected to the upper end of the limit box, and the lower end of the limit box is fixedly connected to a group of drill bits.
[0008] Specifically, a group of moving components are installed on the device body, and the interior of the moving components includes a connecting frame, a limit column, a slide plate, a slide groove and a scale. Multiple groups of the slide grooves are opened inside the device body, and multiple groups of slide plates are slidably connected inside the slide grooves. A group of mounting frames are fixedly connected to the upper ends of the slide plates, a group of connecting frames are fixedly connected to one side of the motor, and a group of limit columns are slidably connected inside the connecting frame.
[0009] Specifically, the limit column is also slidably connected to the outer wall of the slide slot and the inside of the slide plate. A set of scales is fixedly installed on one side of the slide slot. The scales are fixedly installed on the upper end of the equipment body and are located at the lower end of the connecting frame.
[0010] Specifically, a group of clamping components is fixedly installed on the device body, and the interior of the clamping component includes a first electric push rod, a base, an extrusion plate, a first set of plates and a first spring. Multiple groups of the bases are fixedly installed on the device body, and a group of first electric push rods are fixedly installed on the base. The output shaft of the first electric push rod is fixedly connected to a group of extrusion plates, and there is a gap between the extrusion plates and the device body. Another group of extrusion plates is fixedly connected to one end of the first set of plates, and the first set of plates is fixedly installed on one side of the partition. One side of the other group of extrusion plates is also fixedly connected to one end of the first spring, and the other end of the first spring is fixedly connected to the side wall of the punching table.
[0011] Specifically, a group of punching tables are fixedly provided on the equipment body, and a group of partitions are fixedly installed on the equipment body, and the partitions are located between the mounting frame and the punching tables.
[0012] Beneficial effects of the present invention: After the second electric push rod in the present invention is retracted, the limit on the arc block will be released. At this time, it is only necessary to rotate the limit block, and the arc block will gradually separate from the partition opened in the limit box. The limit box will no longer limit the arc block and the limit block. After the limit is completely released, the drill bit can be removed and the drill bit can be quickly replaced, thereby improving work efficiency.
[0013] In the present invention, the limit on the entire punching assembly can be cancelled by simply removing the limit column. At this time, the staff can move the punching assembly. The distance between each punching assembly can be accurately controlled by the staff through a ruler, thereby increasing the accuracy of workpiece processing and improving the processing quality.
[0014] After the first electric push rod in the present invention is started, it will push a group of extrusion plates to move forward, thereby clamping the workpiece between the two groups of extrusion plates. The position of the workpiece punching can be changed by the extension length of the first electric push rod to adapt to different processing requirements. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] The present invention is further described below in conjunction with the accompanying drawings and embodiments.
[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a connection structure distribution diagram of the integral side parts in the present invention; Figure 3 This is a distribution diagram of the overall rear part connection structure of the present invention; Figure 4 It is an exploded view of the connection structure of the drill bit, the limit assembly and other parts in the present invention; Figure 5 A cross-sectional view of the connection structure between the drill bit and the limit assembly in the present invention; Figure 6 for Figure 1 Enlarged view of point A in the middle; Figure 7 for Figure 4 Enlarged view of point B in the middle; Figure 8 for Figure 5 Enlarged view of point C in the middle.
[0017] In the figure: 1. Equipment body; 110. Punching table; 111. Partition; 2. Clamping assembly; 210. First electric push rod; 211. Base; 212. Extrusion plate; 213. First set of rods; 214. First spring; 3. Moving assembly; 310. Connecting frame; 311. Limiting column; 312. Slide plate; 313. Slide groove; 314. Scale; 4. Punching assembly; 410. Mounting frame; 411. Motor; 412. Second set of rods; 413. Hydraulic rod; 414. Connecting plate; 415. Connecting disk; 416. Transmission shaft; 417. Transmission belt; 418. Connecting column; 419. Drill bit; 5. Limiting assembly; 510. Limiting block; 511. Connecting column; 512. Reset spring; 513. Arc block; 514. Second electric push rod; 515. Limiting box. DETAILED DESCRIPTION
[0018] In order to make the technical methods, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.
[0019] like Figure 4 , 5 , 7 and Figure 8 As shown, in view of the problems in the prior art, the present invention provides a multi-stage drill assembly device for mechanical processing, including an equipment body 1, the limit assembly 5 is installed at the upper end of the drill bit 419, the interior of the limit assembly 5 includes a limit block 510, a connecting column 511, a reset spring 512, an arc block 513, a second electric push rod 514 and a limit box 515, the lower end of the limit block 510 is fixedly connected to the upper end of the drill bit 419, the side wall of the limit block 510 is fixedly provided with multiple groups of mounting grooves, and the connecting column 511 is fixedly installed in the mounting grooves on the side wall of the limit block 510 Internally, the reset spring 512 is installed on the outer wall of the connecting column 511, the arc block 513 is rotatably connected to the outer wall of the connecting column 511, a limiting hole is opened at the upper end of the arc block 513, the output shaft of the second electric push rod 514 is slidably connected to the limiting hole opened at the upper end of the arc block 513, the second electric push rod 514 is fixedly installed on the upper end of the partition inside the limit box 515, the upper end of the limit box 515 is fixedly connected to the lower end of the connecting column 418, a partition is opened inside the limit box 515, and a plurality of sliding openings are opened on the inner wall of the partition inside the limit box 515.
[0020] In the present invention, when the drill bit 419 needs to be disassembled and replaced, it is only necessary to control the second electric push rod 514 to start, at which time the second electric push rod 514 will shrink, thereby contacting the limit of the arc block 513. After the arc block 513 is released from the limit, it is only necessary to rotate the drill bit 419 in the forward direction, at which time the drill bit 419 will drive the limit block 510 to rotate together, and the arc block 513 will gradually withdraw from the inner interlayer of the limit box 515 driven by the limit block 510. At this time, the limit box 515 will no longer have a limiting effect on the arc block 513 and the limit block 510. Under the squeezing of the side wall of the limit box 515, the arc block 513 will slowly rotate on the connecting column 511, thereby entering the installation groove opened on the outer wall of the limit block 510. Finally, it is only necessary to pull the drill bit 419 to remove the drill bit 419 from the limit box 515 is removed from the inside, and the arc block 513 at the upper end of the new drill bit 419 is pinched hard. The arc block 513 on this drill bit 419 will be located in the installation groove on the limit block 510. Then, the upper end of the limit block 510 is aligned with the lower end of the limit box 515 and slowly inserted into the limit box 515. The drill bit 419 is rotated in the opposite direction. At this time, the arc block 513 is no longer squeezed by the inner wall of the limit box 515, and it will slowly enter the internal compartment of the limit box 515, thereby limiting the arc block 513 and the limit block 510. Then, the second electric push rod 514 is started and it starts to extend. When the output shaft of the second electric push rod 514 enters the limit groove opened at the top of the arc block 513, it stops extending. The disassembly and replacement of the drill bit 419 can be quickly completed, which can effectively improve work efficiency.
[0021] like Figure 2 as well as Figure 6As shown, the device body 1 is equipped with a plurality of punching assemblies 4, the punching assemblies 4 include a mounting frame 410, a motor 411, a second set of rods 412, a hydraulic rod 413, a connecting plate 414, a connecting plate 415, a transmission shaft 416, a transmission belt 417, a connecting column 418 and a drill bit 419, the mounting frame 410 is slidably mounted inside the slide slot 313, a set of motors 411 is fixedly mounted on the upper end of the mounting frame 410, the output shaft of the motor 411 is fixedly connected to the upper end of the second set of rods 412, the second set of rods 412 is rotatably connected to the inside of the connecting plate 414, and the upper end of the connecting plate 414 is fixedly connected The output shaft of the hydraulic rod 413, the base of the hydraulic rod 413 is fixedly connected to the lower end side wall of the mounting frame 410, the lower end of the second set of rods 412 is rotatably connected to the upper end of the connecting plate 415, the lower end of the connecting plate 415 is fixedly connected to a group of transmission shafts 416, two groups of transmission belts 417 are coupled to the transmission shafts 416, one end of each group of transmission belts 417 is coupled to a group of connecting columns 418, the upper ends of the connecting columns 418 are rotatably connected to the lower end of the connecting plate 414, the lower ends of the connecting columns 418 are fixedly connected to the upper end of the limit box 515, and the lower end of the limit box 515 is fixedly connected to a group of drill bits 419.
[0022] After adjusting the spacing between the punching components 4, the present invention starts the hydraulic rod 413, which will drive the connecting plate 414 to move downward, and the connecting plate 414 will drive the output end of the second set of rods 412 to move together. When one end of the drill bit 419 contacts the surface of the workpiece, the motor 411 is started, which will drive the second set of rods 412 to rotate, and the second set of rods 412 will drive the transmission shaft 416 to rotate, and then use the transmission of the transmission belt 417 to drive the drill bit 419 to rotate, thereby achieving the effect of punching holes in the workpiece.
[0023] like Figure 1 as well as Figure 3As shown, a group of moving components 3 are installed on the device body 1, and the interior of the moving component 3 includes a connecting frame 310, a limiting column 311, a slide plate 312, a slide groove 313 and a scale 314. Multiple groups of the slide grooves 313 are opened in the interior of the device body 1, and multiple groups of slide plates 312 are slidably connected inside the slide grooves 313. The upper end of the slide plate 312 is fixedly connected with a group of mounting frames 410, and one side of the motor 411 is fixedly connected with a group of connecting frames 310. The interior of the connecting frame 310 is slidably connected with a group of limiting columns 311, and the limiting columns 311 are also slidably connected to the outer wall of the slide groove 313 and the interior of the slide plate 312. A group of scales 314 is fixedly installed on one side of the slide groove 313, and the scale 314 is fixedly installed on the upper end of the device body 1. The scale 314 is located at the lower end of the connecting frame 310. A group of clamping components 2 are fixedly installed on the device body 1. The interior of the clamping components 2 It includes a first electric push rod 210, a base 211, an extrusion plate 212, a first set of plates 213 and a first spring 214. Multiple groups of the bases 211 are fixedly installed on the device body 1. A group of first electric push rods 210 is fixedly installed on the base 211. The output shaft of the first electric push rod 210 is fixedly connected to a group of extrusion plates 212. There is a gap between the extrusion plates 212 and the device body 1. Another group of extrusion plates 212 is fixedly connected to one end of the first set of plates 213. The first set of plates 213 is fixedly installed on one side of the partition 111. One side of another group of extrusion plates 212 is also fixedly connected to one end of the first spring 214. The other end of the first spring 214 is fixedly connected to the side wall of the punching table 110. A group of punching tables 110 is fixedly opened on the device body 1. A group of partitions 111 are fixedly installed on the device body 1. The partition 111 is located between the mounting frame 410 and the punching table 110.
[0024] In the present invention, the workpiece to be punched is first placed on the punching table 110, and then the first electric push rod 210 is started. At this time, the first electric push rod 210 will drive a group of bases 211 to extend forward, and the first spring 214 will generate an elastic force under the squeezing of the first electric push rod 210, thereby clamping the workpiece between the two groups of squeezing plates 212. The compression length of the first spring 214 will change according to the extension length of the first electric push rod 210. Therefore, the staff can adjust the extension length of the first electric push rod 210 to change the punching position of the workpiece. After the workpiece is fixed, the limit column 311 can be taken out, and then the slide plate 312 can be slid inside the slide groove 313. The sliding distance can be strictly calculated by the staff according to the scale 314, so as to more accurately control the spacing between the two groups of punching components 4, so as to adapt to different punching requirements.
[0025] Working principle: first, place the workpiece to be punched on the punching table 110, and then start the first electric push rod 210. At this time, the first electric push rod 210 will drive a group of bases 211 to extend forward, and the first spring 214 will generate an elastic force under the extrusion of the first electric push rod 210, so that the workpiece is clamped between the two groups of extrusion plates 212. The compression length of the first spring 214 will change according to the extension length of the first electric push rod 210. Therefore, the staff can adjust the extension length of the first electric push rod 210 to change the punching position of the workpiece. After the workpiece is fixed, the limit column 311 can be taken out, and then the slide plate 312 can be slid inside the slide groove 313. The sliding distance can be adjusted by the staff according to the scale 314. To strictly calculate, so as to more accurately control the distance between the two sets of punching components 4, so as to adapt to different punching needs, after adjusting the distance between the punching components 4, start the hydraulic rod 413, which will drive the connecting plate 414 to move downward, and the connecting plate 414 will drive the output end of the second set of rods 412 to move together, when one end of the drill bit 419 contacts the surface of the workpiece, start the motor 411, which will drive the second set of rods 412 to rotate, and the second set of rods 412 will drive the transmission shaft 416 to rotate, and then use the transmission of the transmission belt 417 to drive the drill bit 419 to rotate, so as to achieve the effect of punching holes in the workpiece, when the drill bit 419 needs to be disassembled and replaced, it is only necessary to control the second electric push rod 514 to start, at this time the second electric The push rod 514 will shrink and contact the limit of the arc block 513. After the arc block 513 is released from the limit, it only needs to rotate the drill bit 419 in the forward direction. At this time, the drill bit 419 will drive the limit block 510 to rotate together. The arc block 513 will gradually withdraw from the inner interlayer of the limit box 515 driven by the limit block 510. At this time, the limit box 515 will no longer have a limiting effect on the arc block 513 and the limit block 510. The arc block 513 will slowly rotate on the connecting column 511 under the squeezing of the side wall of the limit box 515, thereby entering the installation groove opened on the outer wall of the limit block 510. Finally, it is only necessary to pull the drill bit 419 to remove the drill bit 419 from the inside of the limit box 515, and replace the arc The arc block 513 is pinched hard, and the arc block 513 on the drill bit 419 will be located in the installation groove on the limit block 510. Then, the upper end of the limit block 510 is aligned with the lower end of the limit box 515, and it is slowly inserted into the limit box 515. The drill bit 419 is rotated in the opposite direction. At this time, the arc block 513 is no longer squeezed by the inner wall of the limit box 515, and it will slowly enter the internal compartment of the limit box 515, thereby limiting the arc block 513 and the limit block 510. Then, the second electric push rod 514 is started, and it will start to extend. When the output shaft of the second electric push rod 514 enters the limit groove opened at the top of the arc block 513, it stops extending, and the drill bit 419 can be quickly disassembled and replaced, which can effectively improve work efficiency.
[0026] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection claimed by the present invention.
Claims
1. A multi-stage drill assembly for machining, characterized in that: The device comprises a main body (1); A limit assembly (5), the limit assembly (5) being mounted on the upper end of the drill bit (419), the limit assembly (5) comprising a limit block (510), a connecting column (511), a return spring (512), an arc block (513), a second electric push rod (514) and a limit box (515); a limit block (510), wherein the lower end of the limit block (510) is fixedly connected to the upper end of the drill bit (419), and a plurality of mounting grooves are fixedly provided on the side wall of the limit block (510); A connecting column (511), wherein the connecting column (511) is fixedly mounted inside a mounting groove on a side wall of the limiting block (510); A return spring (512), wherein the return spring (512) is mounted on an outer wall of the connecting column (511); An arc-shaped block (513), the arc-shaped block (513) being rotatably connected to the outer wall of the connecting column (511), and a limiting hole being provided at the upper end of the arc-shaped block (513); A second electric push rod (514), wherein an output shaft of the second electric push rod (514) is slidably connected to a limiting hole provided at the upper end of the arc block (513), and the second electric push rod (514) is fixedly mounted at the upper end of the partition inside the limiting box (515); A limit box (515), the upper end of which is fixedly connected to the lower end of the connecting column (418), a partition is provided inside the limit box (515), and a plurality of groups of sliding openings are provided on the inner wall of the partition inside the limit box (515).
2. A multi-stage drill assembly for machining according to claim 1, characterized in that: A plurality of punching assemblies (4) are installed on the equipment body (1), and the interior of the punching assemblies (4) includes a mounting frame (410), a motor (411), a second set of rods (412), a hydraulic rod (413), a connecting plate (414), a connecting disk (415), a transmission shaft (416), a transmission belt (417), a connecting column (418), and a drill bit (419), and the mounting frame (410) is slidably installed inside the slide groove (313).
3. A multi-stage drill assembly for machining according to claim 2, characterized in that: A group of motors (411) are fixedly mounted on the upper end of the mounting frame (410); the output shaft of the motor (411) is fixedly connected to the upper end of a second set of rods (412); the second set of rods (412) is rotatably connected to the inside of a connecting plate (414); the upper end of the connecting plate (414) is fixedly connected to the output shaft of a hydraulic rod (413); and the base of the hydraulic rod (413) is fixedly connected to the lower end side wall of the mounting frame (410).
4. The multi-stage drill assembly for machining according to claim 1, characterized in that: The lower end of the second sleeve rod (412) is rotatably connected to the upper end of the connecting plate (415); the lower end of the connecting plate (415) is fixedly connected to a group of transmission shafts (416); two groups of transmission belts (417) are coupled to the transmission shafts (416); one end of each group of transmission belts (417) is coupled to a group of connection columns (418); the upper end of the connection column (418) is rotatably connected to the lower end of the connecting plate (414); the lower end of the connection column (418) is fixedly connected to the upper end of the limit box (515); and the lower end of the limit box (515) is fixedly connected to a group of drill bits (419).
5. The multi-stage drill assembly for machining according to claim 1, characterized in that: A group of moving components (3) is installed on the device body (1), and the interior of the moving component (3) includes a connecting frame (310), a limiting column (311), a slide plate (312), a slide groove (313) and a scale (314), and a plurality of groups of the slide grooves (313) are arranged inside the device body (1).
6. A multi-stage drill assembly for machining according to claim 4, characterized in that: A plurality of groups of slide plates (312) are slidably connected inside the slide groove (313), a group of mounting frames (410) are fixedly connected to the upper ends of the slide plates (312), a group of connecting frames (310) are fixedly connected to one side of the motor (411), and a group of limiting columns (311) are slidably connected inside the connecting frames (310).
7. A multi-stage drill assembly for machining according to claim 6, characterized in that: The limiting column (311) is also slidably connected to the outer wall of the slide groove (313) and the interior of the slide plate (312); a set of scales (314) is fixedly mounted on one side of the slide groove (313); the scales (314) are fixedly mounted on the upper end of the device body (1); and the scales (314) are located at the lower end of the connecting frame (310).
8. The multi-stage drill assembly for machining according to claim 1, characterized in that: A group of clamping components (2) are fixedly mounted on the device body (1), and the interior of the clamping component (2) comprises a first electric push rod (210), a base (211), an extrusion plate (212), a first set of plates (213) and a first spring (214). Multiple groups of the base (211) are fixedly mounted on the device body (1).
9. A multi-stage drill assembly for machining according to claim 8, characterized in that: A group of first electric push rods (210) is fixedly mounted on the base (211); an output shaft of the first electric push rod (210) is fixedly connected to a group of extrusion plates (212); a gap exists between the extrusion plates (212) and the device body (1); another group of extrusion plates (212) is fixedly connected to one end of a first set of plates (213); the first set of plates (213) is fixedly mounted on one side of the partition (111); one side of the other group of extrusion plates (212) is also fixedly connected to one end of a first spring (214); the other end of the first spring (214) is fixedly connected to the side wall of the punching table (110).
10. The multi-stage drill assembly for machining according to claim 1, characterized in that: A group of punching tables (110) are fixedly provided on the equipment body (1), and a group of partitions (111) are fixedly installed on the equipment body (1), wherein the partitions (111) are located between the mounting frame (410) and the punching tables (110).
Citation Information
Patent Citations
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