A multi-spindle machine for tapping

Abstract

This utility model discloses a multi-spindle device for a tapping machine, including a fixed clamp connected to the main spindle of the tapping head of the tapping machine. A fixed frame is fixedly connected to the bottom of the fixed clamp, and a rotating shaft connected to the drive shaft of the tapping machine is rotatably connected to the top of the fixed frame. Multiple crankshafts are mounted on the front and back sides of the rotating shaft on the fixed frame. The crankshafts are connected to each other through a drive frame, and the rotating shaft is connected to the drive frame through an eccentric wheel assembly. This utility model provides a vibration-damping effect by using a counterweight suspended inside the vibration damper to provide a reverse force to alleviate vibration. In addition, when moving downwards to tap and drill, the clamping assembly presses the workpiece downwards, and the reverse force of the clamping assembly provides support to the bottom of the fixed frame, further alleviating vibration. This achieves multi-faceted vibration reduction of the fixed frame, thereby improving the stability of the fixed frame and the tapping head.

Description

Technical Field

[0001] This utility model relates to the field of tapping machine technology, specifically a multi-spindle device for tapping machines. Background Technology

[0002] A multi-spindle drill, also known as a multi-hole drill, multi-axis drill bit, or multi-spindle head, is a new type of hole-making device installed on a tapping machine. The multi-spindle drill is raised and lowered synchronously by the main spindle of the tapping machine. The rotation of the drive shaft of the tapping machine drives the rotating shaft of the multi-spindle drill to rotate. The rotating shaft synchronously drives multiple tapping heads to rotate, achieving the effect of processing multiple holes at the same time and improving production efficiency.

[0003] There are various transmission methods between the internal shaft and the tapping head of a multi-spindle head, mainly including gear transmission, universal joint transmission, and linkage transmission. Gear transmission requires regular lubrication and is noisy, while universal joint transmission and linkage transmission are prone to vibration at high speeds. Gear transmission and universal joint transmission are mainly suitable for situations with small hole spacing, while linkage transmission is often used for situations with large hole spacing. In multi-hole machining, situations with large hole spacing are frequently encountered. To avoid the problem of high-speed vibration caused by linkage transmission in large hole spacing machining, our company has designed and proposed a new type of vibration-resistant multi-spindle head. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a multi-spindle device for tapping machines, which solves the problem of high-speed vibration caused by the use of linkage transmission in the large hole spacing machining of existing multi-spindle devices.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0006] A multi-spindle device for a tapping machine includes a fixed clamp connected to the main spindle of the tapping head of the tapping machine. A fixed frame is fixedly connected to the bottom of the fixed clamp. A rotating shaft that is rotatably connected to the top of the fixed frame and is driven by the drive shaft of the tapping machine is rotatably connected to the top of the fixed frame. Multiple crankshafts are mounted on the front and back sides of the rotating shaft on both sides of the fixed frame. The crankshafts are driven by a drive frame. The rotating shaft and the drive frame are driven by an eccentric wheel assembly.

[0007] The top rear of the fixed frame is provided with a guide limiting mechanism that is slidably connected to the column of the tapping machine. The bottom of the fixed frame is also provided with a tapping head that is movably installed with the crankshaft via a quick-release chuck. An anti-vibration damper is installed inside the lower part of the fixed frame. A clamping assembly is also provided at the bottom of the fixed frame between the anti-vibration damper and the tapping head.

[0008] The seismic damper includes a shielding cover that is plugged into a fixed frame and a sealing cover that is threaded to the bottom of the fixed frame and connected to the opening of the shielding cover. A counterweight is suspended from the top of the inner wall of the shielding cover by a connecting rope. A ball seat is fixed to the bottom of the counterweight and the bottom of the inner wall of the sealing cover. A tension spring is connected between the ball heads of the two ball seats. Multiple magnetic blocks are fixed at equal intervals along the circumference near the bottom of the surface of the counterweight. Multiple magnetic strips are fixed at equal intervals along the circumference near the bottom of the inner side wall of the shielding cover. The magnetic poles of the opposite sides of the magnetic blocks and magnetic strips are the same.

[0009] The clamping assembly includes a guide sleeve fixed to the bottom of the fixing frame, a guide post movably inserted inside the guide sleeve, a clamping block fixed to the bottom of the guide post, a connecting rod fixed to the top of the guide post with its upper end movably penetrating the bottom of the fixing frame and equipped with an adjusting nut, and a compression spring movably sleeved on the surface of the connecting rod between the guide post and the fixing frame.

[0010] Preferably, it also includes a clamp that is fitted onto the surface of the fixing sleeve.

[0011] Preferably, it also includes a sleeve fixedly connected to the top of the shaft, and the lower end of the drive shaft is square-headed and movably inserted into the sleeve.

[0012] Preferably, the crankshaft and tapping head include two sets located on the front and back of the shaft, and the transmission frame has an "I"-shaped structure adapted to the position of the crankshaft.

[0013] Preferably, the guide limiting mechanism includes a fixed seat fixed on a fixed frame, an internal threaded sleeve rotatably connected to the back of the fixed seat, an adjusting screw connected to the internal thread of the internal threaded sleeve, a guide seat rotatably connected to the rear end of the adjusting screw, and insert rods forked onto the main shaft fixed on both sides of the guide seat, with rollers rotatably connected to the surface of the main shaft.

[0014] Preferably, reinforcing corner plates are fixed inside each of the four corners of the fixing frame.

[0015] Preferably, a rubber gasket fitted onto the opening of the shielding cover is provided between the shielding cover and the sealing cover and the fixing frame.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] This invention utilizes an eccentric wheel assembly to synchronously drive multiple crankshafts and tapping heads to rotate for hole machining via a transmission frame. A vibration damper is installed on the crankshaft mounting bracket, and a counterweight suspended inside the damper provides a reverse force to mitigate vibration and improve damping effectiveness. Furthermore, during downward movement for tapping and drilling, a clamping assembly presses the workpiece downwards, and the reverse force of the clamping assembly provides support to the lower part of the mounting bracket, further reducing vibration. The vibration damper and clamping assembly work together to achieve multi-faceted vibration reduction of the mounting bracket, improving the stability of both the mounting bracket and the tapping heads. This solves the problem of high-speed vibration inherent in existing multi-axis machining with large hole spacing using linkage drives. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the installation structure of this utility model;

[0019] Figure 2 This is a front view of the present utility model;

[0020] Figure 3 This is a side view of the present invention;

[0021] Figure 4 This is a top view of the guide and limiting mechanism of this utility model;

[0022] Figure 5 This is a partial structural diagram of the corresponding position of the sleeve of this utility model;

[0023] Figure 6 This is a top view of the transmission frame of this utility model;

[0024] Figure 7 This is a schematic diagram of the internal structure of the seismic damper of this utility model;

[0025] Figure 8 This is a top cross-sectional view of the magnetic stripe at the corresponding position in this utility model;

[0026] Figure 9 This is a schematic diagram of the internal structure of the clamping assembly of this utility model.

[0027] In the diagram: 1. Tapping head; 2. Spindle; 3. Fixed chuck; 4. Fixed frame; 401. Reinforcing angle; 5. Drive shaft; 6. Rotating shaft; 7. Crankshaft; 8. Drive frame; 9. Eccentric wheel assembly; 10. Column; 11. Guide limit mechanism; 1101. Fixed seat; 1102. Internal threaded sleeve; 1103. Adjusting screw; 1104. Guide seat; 1105. Insert rod; 1106. Roller; 12. Quick-release chuck; 13. Tapping head; 14. 1401. Seismic damper; 1402. Shielding cover; 1403. Sealing cover; 1404. Connecting rope; 1405. Counterweight; 1406. Ball seat; 1407. Tension spring; 1408. Magnetic block; 1409. Magnetic strip; 15. Clamping assembly; 1501. Guide sleeve; 1502. Guide post; 1503. Clamping block; 1504. Adjusting nut; 1505. Connecting rod; 1506. Compression spring; 16. Clamping clamp; 17. Sleeve; 18. Rubber pad. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] like Figure 1-9 As shown, this utility model provides a technical solution: a multi-spindle device for a tapping machine, including a fixed clamp 3 connected to the main spindle 2 on the tapping head 1 of the tapping machine, and a clamp 16 sleeved on the surface of the fixed clamp 3. A fixed frame 4 is fixedly connected to the bottom of the fixed clamp 3. Reinforcing angle plates 401 are fixed inside the four corners of the fixed frame 4. A rotating shaft 6 that is rotatably connected to the top of the fixed frame 4 and is connected to the drive shaft 5 of the tapping machine is also connected to the top of the rotating shaft 6. A sleeve 17 is fixedly connected to the top of the rotating shaft 6. The lower end of the drive shaft 5 is square-headed and movably inserted into the sleeve 17.

[0030] Multiple sets of crankshafts 7 are mounted on the front and back sides of the rotating shaft 6 on the fixed frame 4. The crankshafts 7 are connected to each other through a transmission frame 8. The crankshafts 7 and the tapping head 13 include two sets located on the front and back sides of the rotating shaft 6. The transmission frame 8 has an "I" shaped structure adapted to the position of the crankshafts 7. The rotating shaft 6 and the transmission frame 8 are connected through an eccentric wheel assembly 9.

[0031] A guide limiting mechanism 11 is provided at the top rear of the fixed frame 4 and is slidably connected to the column 10 of the tapping machine. The guide limiting mechanism 11 includes a fixed seat 1101 fixed on the fixed frame 4. An internal threaded sleeve 1102 is rotatably connected to the back of the fixed seat 1101. An adjusting screw 1103 is connected to the internal thread of the internal threaded sleeve 1102. A guide seat 1104 is rotatably connected to the rear end of the adjusting screw 1103. Insert rods 1105 forked on the spindle 2 are fixed on both sides of the guide seat 1104. Rollers 1106 that are rotatably connected to the surface of the spindle 2 are rotatably connected to the insert rods 1105.

[0032] Below the fixed frame 4, there is a tapping head 13 that is movably installed with the crankshaft 7 via a quick-release chuck 12. Inside the fixed frame 4, there is a shock damper 14. The shock damper 14 includes a shield 1401 that is inserted and installed on the fixed frame 4, and a sealing cover 1402 that is threaded to the bottom of the fixed frame 4 on the opening of the shield 1401. A rubber gasket 18 that is sleeved on the opening of the shield 1401 is provided between the shield 1401 and the sealing cover 1402 and the fixed frame 4.

[0033] A counterweight 1404 is suspended from the top of the inner wall of the shielding cover 1401 by a connecting rope 1403. Ball seats 1405 are fixed to the bottom of the counterweight 1404 and the bottom of the inner wall of the sealing cover 1402. A tension spring 1406 is connected between the ball heads of the two ball seats 1405. Multiple magnetic blocks 1407 are fixed equidistantly along the circumference near the bottom of the surface of the counterweight 1404. Multiple magnetic strips 1408 are fixed equidistantly along the circumference near the bottom of the inner wall of the shielding cover 1401. The magnetic poles of the opposite sides of the magnetic blocks 1407 and the magnetic strips 1408 are the same.

[0034] A clamping assembly 15 is also provided at the bottom of the fixing frame 4, between the anti-vibration damper 14 and the tapping head 13. The clamping assembly 15 includes a guide sleeve 1501 fixed to the bottom of the fixing frame 4. A guide post 1502 is movably inserted into the guide sleeve 1501. A clamping block 1503 is fixed at the bottom of the guide post 1502. A connecting rod 1505 with an upper end movably penetrating the bottom of the fixing frame 4 and equipped with an adjusting nut 1504 is fixed at the top of the guide post 1502. A compression spring 1506 located between the guide post 1502 and the fixing frame 4 is movably sleeved on the surface of the connecting rod 1505.

[0035] Working principle:

[0036] The fixed clamp 3 is fitted onto the main spindle 2 of the tapping machine, and the clamp 16 is locked to achieve top fixation. One hand holds the insertion rod 1105 of the guide limiting mechanism 11 so that it is forked onto the column 10 of the tapping machine, and the other hand uses a wrench to turn the internal thread sleeve 1102. The adjusting screw 1103 moves outward and extends to press the roller 1106 on the guide seat 1104 onto the surface of the column 10. When the main spindle 2 drives the fixed seat 1101 to move up and down, the roller 1106 rolls along the column 10 to guide and limit the fixed seat 1101.

[0037] The spindle 2 drives the fixed frame 4 to move downwards. The clamping assembly 15 below the fixed frame 4 supports the top of the workpiece. The clamping assembly 15 provides support and fixation to the bottom of the fixed frame 4 through the reverse force, thereby reducing vibration. The drive shaft of the tapping machine drives multiple crankshafts 7 and tapping heads 13 to rotate synchronously through a set of sleeves 17, rotating shafts 6, eccentric wheel assembly 9 and transmission frame 8, thereby achieving multi-hole tapping and drilling. The anti-vibration damper 14 is internally connected by a rope 1403 to suspend a counterweight 1404. The delayed swing of the counterweight 1404 caused by vibration achieves a damping effect. The tension spring 1406 improves the overall effect of the counterweight 1404 and the anti-vibration damper 14. When the counterweight 1404 swings to the highest point, the magnetic repulsion between the magnetic strip 1408 and the magnetic block 1407 prevents them from colliding and causing secondary vibration. By simultaneously fixing the top of the fixed frame 4, damping the middle, and fixing the bottom, the effect of reducing vibration and improving the hole machining accuracy is achieved.

[0038] It should be noted that, in this document, terms such as “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0039] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A multi-spindle device for a tapping machine, comprising a fixed clamp (3) connected to the main spindle (2) of the tapping head (1) of the tapping machine, characterized in that: The bottom of the fixed clamp (3) is fixedly connected to a fixed frame (4), and the top of the fixed frame (4) is rotatably connected to a rotating shaft (6) that is connected to the drive shaft (5) of the tapping machine. Multiple sets of crankshafts (7) are installed on the front and back sides of the rotating shaft (6) on both sides of the fixed frame (4). The crankshafts (7) are connected to each other through a drive frame (8), and the rotating shaft (6) is connected to the drive frame (8) through an eccentric wheel assembly (9). The top rear of the fixed frame (4) is provided with a guide limiting mechanism (11) that is slidably connected to the column (10) of the tapping machine. The bottom of the fixed frame (4) is also provided with a tapping head (13) that is movably installed with the crankshaft (7) through a quick-release chuck (12). The lower interior of the fixed frame (4) is provided with a shock damper (14). The bottom of the fixed frame (4) is also provided with a clamping assembly (15) located between the shock damper (14) and the tapping head (13). The seismic damper (14) includes a shield (1401) that is plugged into and installed on a fixed frame (4) and a sealing cover (1402) that is threaded to the bottom of the fixed frame (4) on the opening of the shield (1401). A counterweight (1404) is suspended from the top of the inner wall of the shield (1401) by a connecting rope (1403). A ball seat (1405) is fixed to the bottom of the counterweight (1404) and the bottom of the inner wall of the sealing cover (1402). A tension spring (1406) is connected between the ball heads of the two ball seats (1405). Multiple magnetic blocks (1407) are fixed equidistantly along the circumference near the bottom of the surface of the counterweight (1404). Multiple magnetic strips (1408) are fixed equidistantly along the circumference near the bottom of the inner side wall of the shield (1401). The magnetic poles of the opposite sides of the magnetic blocks (1407) and the magnetic strips (1408) are the same. The clamping assembly (15) includes a guide sleeve (1501) fixed to the bottom of the fixing frame (4), a guide post (1502) is movably inserted inside the guide sleeve (1501), a clamping block (1503) is fixed to the bottom of the guide post (1502), a connecting rod (1505) with an upper end movably penetrating the bottom of the fixing frame (4) and equipped with an adjusting nut (1504) is fixed to the top of the guide post (1502), and a compression spring (1506) located between the guide post (1502) and the fixing frame (4) is movably sleeved on the surface of the connecting rod (1505).

2. A multi-spindle device for a tapping machine according to claim 1, characterized in that: It also includes a clamp (16) that is fitted onto the surface of the fixing sleeve (3).

3. A multi-spindle adapter for a tapping machine according to claim 1, characterized in that: It also includes a sleeve (17) fixedly connected to the top of the rotating shaft (6), and the lower end of the transmission shaft (5) is square-headed and movably inserted into the sleeve (17).

4. A multi-spindle device for a tapping machine according to claim 1, characterized in that: The crankshaft (7) and tapping head (13) include two sets located on the front and back of the rotating shaft (6), and the transmission frame (8) is in the shape of an "I" that is adapted to the position of the crankshaft (7).

5. A multi-spindle adapter for a tapping machine according to claim 1, characterized in that: The guide limiting mechanism (11) includes a fixed seat (1101) fixed on a fixed frame (4). The back of the fixed seat (1101) is rotatably connected to an internal threaded sleeve (1102). An adjusting screw (1103) is threaded inside the internal threaded sleeve (1102). A guide seat (1104) is rotatably connected to the rear end of the adjusting screw (1103). A forked insert (1105) is fixed on both sides of the guide seat (1104) and a roller (1106) is rotatably connected to the surface of the main shaft (2).

6. A multi-spindle device for a tapping machine according to claim 1, characterized in that: The four corners of the fixing frame (4) are all fixed with reinforcing corner plates (401).

7. A multi-spindle adapter for a tapping machine according to claim 1, characterized in that: A rubber gasket (18) is provided between the shield (1401) and the sealing cover (1402) and the fixing frame (4) and is fitted onto the opening of the shield (1401).

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