Hole flanging and punching device for automobile seat

Abstract

The invention discloses a hole flanging stamping device for an automobile seat, relates to the technical field of hole flanging, and aims to solve the technical problem of low hole flanging stamping accuracy of the automobile seat. The hole flanging stamping device comprises stamping equipment, a mounting seat, a hole flanging mechanism and a rotating mechanism; the hole flanging mechanism comprises a reaming block, a pre-drill bit, a separation block B and a separation block A; the plurality of reaming blocks can perform expanding or tightening movement at the same time; the plurality of separation blocks A and the plurality of separation blocks B can expand or shrink at the same time; when the plurality of separation blocks A and the plurality of separation blocks B are shrunk to the minimum gap, the plurality of separation blocks A and the plurality of separation blocks B are of an up-and-down structure and form a pre-drilling form together with the pre-drilling bit; and when the multiple separation blocks B expand to the maximum gap, the multiple separation blocks B can ascend, so that the multiple separation blocks A and the multiple separation blocks B form an annular plane structure, and the whole hole flanging mechanism forms a hole flanging form. The punching device has the advantages that the hole flanging punching precision of the automobile seat is high, and polishing is not needed.

Description

Technical Field

[0001] The invention relates to the technical field of hole punching, and more particularly to a hole punching device for automobile seats. Background Art

[0002] Hole drilling for automobile seats is an important process in the seat production process. The accuracy of hole drilling for automobile seats is extremely high. The hole positions on the seats must be accurately matched with various installation parts. If the hole drilling position deviation or dimensional error is too large, the parts cannot be installed smoothly, seriously affecting the assembly efficiency and quality of the seats, and may even cause safety hazards to the seats.

[0003] At present, the traditional hole punching process of automobile seats directly forms a hole after punching. During the punching process, the side wall material is squeezed by the punch and flows into the gap. Even if the punch is strong enough to make the inner wall fit the punch completely, Figure 1 As shown, it is easy to cause uneven dents on the inner wall and a large roundness error. Therefore, after the hole punching is completed, the hole needs to be polished. The depth of the dents on the inner wall caused by the above process is different. It is difficult to ensure the accuracy of the hole after polishing, resulting in low accuracy of the hole punching of the car seat, resulting in more damaged workpieces during the hole punching of the car seat. In view of this, we propose a hole punching device for a car seat. Summary of the invention

[0004] The object of the present invention is to provide a hole punching device for a car seat, so as to solve the technical problem of low hole punching accuracy of the car seat.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: a punching device for a car seat, comprising a punching device, a mounting seat is provided at the movable end of the punching device, and a rotating mechanism for driving the punching mechanism to work is provided on the mounting seat;

[0006] The hole turning mechanism comprises a pre-drilling head connected to the output end of the rotating mechanism, and a plurality of separation blocks B arranged on the pre-drilling head in an annular structure with equal spacing; a plurality of separation blocks A arranged in an annular structure with equal spacing are arranged on the top of the pre-drilling head; a plurality of hole expanding blocks arranged in an annular structure with equal spacing are also arranged on the top of the plurality of separation blocks A;

[0007] Several of the expansion blocks can perform expansion or contraction movements simultaneously;

[0008] A plurality of the separation blocks A and a plurality of the separation blocks B can simultaneously expand or contract;

[0009] When the plurality of separation blocks A and the plurality of separation blocks B are tightened to the minimum gap, the plurality of separation blocks A and the plurality of separation blocks B are in an up-and-down structure and together with the pre-drill bit form a pre-drilling form; when the plurality of separation blocks B are expanded to the maximum gap, they can rise and move, so that the plurality of separation blocks A and the plurality of separation blocks B form an annular plane structure, so that the hole-turning mechanism as a whole forms a hole-turning form. The present invention designs the hole-turning mechanism structure, adopts the pre-drilling form of the hole-turning mechanism to first perform pre-hole-turning, and then adjusts the hole-turning mechanism to form a hole-turning form, so that the hole-turning mechanism as a whole and the hole-turning gap of the concave die form a hole-turning cavity, and controls the rotation of the output shaft of the motor A through an external control mechanism, so that the hole-turning block slides along the eccentric direction of the eccentric groove while revolving, and performs a hole-turning action on the pre-drilled hole, thereby improving the hole-turning stamping accuracy of the automobile seat, solving the technical problem of low hole-turning stamping accuracy of the automobile seat, and reducing subsequent grinding.

[0010] Preferably, a mounting groove A is provided at the top of the mounting seat, a circular groove is provided at the bottom of the mounting seat, a rotating groove is provided at the top of the circular groove, a slide groove A is provided on one side of the rotating groove, a slide groove B is provided at the end of the slide groove A away from the slide groove A, and a mounting groove B is provided on one side of the mounting seat relative to the slide groove B.

[0011] Preferably, the rotating mechanism includes a planetary assembly and a clamping assembly; the planetary assembly includes a motor A, a coupling shaft A, a sun gear, a planetary ring, a planetary gear, a friction circular plate and an inner gear ring; the motor A is fixedly mounted on the mounting groove A, the coupling shaft A is rotatably mounted on the rotating groove, the top end of the coupling shaft A penetrates into the mounting groove A and is fixedly connected to the output shaft of the motor A, the sun gear is disposed at the bottom end of the rotating groove and is rotatably connected to the coupling shaft A, the planetary ring is rotatably mounted on the rotating groove, a plurality of gear grooves are provided on the planetary ring in an annular equidistant structure, the planetary gear is rotatably mounted on the gear groove through a rotating rod, the friction circular plate is fixedly mounted on the top end of the planetary ring, and the inner gear ring is fixedly mounted on the circular groove;

[0012] The clamping assembly includes a clamping block and a friction block. The clamping block is slidably disposed on the slide groove A. The friction block is embedded on the clamping block. The friction block is frictionally matched with the friction circular plate.

[0013] Preferably, the clamping assembly also includes a motor B, a threaded sleeve and a screw; the motor B is fixed on the mounting groove B, the threaded sleeve is slidably arranged in the slide groove B and is fixedly connected to the clamping block, the screw is rotatably arranged on the slide groove B and is threadedly connected to the threaded sleeve, and one end of the screw close to the motor B penetrates into the mounting groove B and is fixedly connected to the output shaft of the motor B.

[0014] Preferably, the hole-turning mechanism further comprises a connecting shaft B, a threaded ring column, an outer sleeve and a lifting block;

[0015] The connecting shaft B is fixedly arranged at the bottom end of the connecting shaft A, the threaded ring column is sleeved on the connecting shaft A and is fixedly connected to the sun gear, the outer sleeve is sleeved on the threaded ring column and is fixedly connected to the planetary ring, a plurality of lifting grooves are provided on the inner edge surface of the outer sleeve in an equidistant structure, a plurality of eccentric grooves are provided on the outer edge surface of the outer sleeve, and a plurality of the eccentric grooves are respectively connected with a plurality of the lifting grooves, a plurality of lifting blocks are provided, and a plurality of the lifting blocks are respectively slidably arranged on a plurality of the lifting grooves, and the pre-drill bit is fixedly arranged at the bottom end of the connecting shaft B.

[0016] Preferably, the bottom end of the threaded ring column is provided with a plurality of inclined guide grooves A in a ring-shaped evenly spaced structure, the eccentric end of the inclined guide groove A is provided with an arc guide groove A, the arc guide groove A and the inclined guide groove A constitute a variable diameter channel A, an inclined guide groove B is provided in the gap between any two adjacent inclined guide grooves A, the eccentric end of the inclined guide groove B is provided with an arc guide groove B, the arc guide groove B and the inclined guide groove B constitute a variable diameter channel B, the top of the inclined guide groove B is provided with an inclined ball groove, the eccentric end of the inclined ball groove is provided with an arc ball groove arranged in an inclined structure, the arc ball groove is connected with the arc guide groove B, the arc ball groove and the inclined ball groove are connected to form a lifting channel, and a ball block A is movably connected in the lifting channel.

[0017] Preferably, several of the hole-expanding blocks are respectively slidably arranged on several of the eccentric grooves, the hole-expanding blocks are adapted to the shape of the outer sleeve, and an inclined guide surface A is provided at one end of the hole-expanding block close to the lifting block, and a movable ball groove is provided along the surface of the hole-expanding block close to one end of the lifting block, and several of the lifting blocks are threadedly connected to the threaded ring column, an inclined guide surface B is provided at one end of the lifting block close to the hole-expanding block, and the lifting block and the movable ball groove are movably connected through the ball block B.

[0018] Preferably, the movable ball groove is composed of an inclined guide groove and a vertical guide groove.

[0019] Preferably, the top of the pre-drilling bit is provided with a plurality of movable grooves in an annular structure with equal spacing, the bottom of the movable groove is provided with a centripetal guide groove, and the gap between any two movable grooves is provided with a centripetal slide groove;

[0020] A plurality of separation blocks B are respectively slidably arranged on a plurality of movable grooves, and a movable column B is rotatably arranged on the separation block B. Both ends of the movable column B are respectively movably connected with the centripetal guide groove and the variable diameter channel B, and the top end of the movable column B penetrates into the lifting channel and is fixedly connected with the ball block A.

[0021] Preferably, a plurality of separation blocks A are movably arranged in a ring-shaped equidistant structure in the gap between the threaded ring column and the pre-drill bit; a movable column A is rotatably connected to the top of the separation block A; the movable column A is movably connected to the variable diameter channel A; a variable diameter slider is fixedly provided at the bottom end of the separation block A; and the variable diameter slider is slidably connected to the centripetal slide groove.

[0022] The beneficial effects of the present invention are:

[0023] 1. The present invention designs a hole-turning mechanism structure, adopts a pre-drilling form of the hole-turning mechanism to pre-turn the hole, and then adjusts the hole-turning mechanism to form a hole-turning form, so that the hole-turning mechanism as a whole and the hole-turning gap of the die form a hole-turning cavity, and controls the rotation of the output shaft of the motor A through an external control mechanism, so that the hole-expanding block slides along the eccentric direction of the eccentric groove while revolving, and expands the pre-drilled hole, thereby improving the hole-expanding stamping accuracy of the automobile seat, solving the technical problem of low hole-expanding stamping accuracy of the automobile seat, and reducing subsequent grinding.

[0024] 2. The present invention also designs the movable ball groove to consist of an inclined guide groove and a vertical guide groove, so that when the ball block B moves on the movable ball groove, the expansion unit formed by several expansion blocks rotates as a whole without changing its diameter, which is used to improve the accuracy of the inner diameter of the hole after expansion. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the traditional punching and punching in the background technology of the present invention;

[0026] Figure 2 It is a schematic diagram of the overall structure of the present invention;

[0027] Figure 3 It is a schematic diagram of the overall structure of the present invention;

[0028] Figure 4 It is a cross-sectional structural schematic diagram of the mounting seat, the rotating mechanism and the hole-turning mechanism of the present invention;

[0029] Figure 5 It is a schematic cross-sectional structure diagram of the mounting base of the present invention;

[0030] Figure 6 It is a schematic diagram of the split structure of the rotating mechanism and the hole-turning mechanism of the present invention;

[0031] Figure 7 for Figure 6 A partial structural enlarged schematic diagram;

[0032] Figure 8 It is a schematic structural diagram of the rotating mechanism of the present invention in a pre-drilling state;

[0033] Fig. 9It is a schematic structural diagram of the rotating mechanism of the present invention in the hole-turning form;

[0034] Fig.10 It is a schematic diagram of the disassembled structure of the rotating mechanism of the present invention in the pre-drilling state;

[0035] Fig.11 It is a schematic diagram of the cross-sectional structure of the hole expanding block and the lifting block of the present invention;

[0036] Fig.12 It is a structural schematic diagram of the coupling B and the pre-drill bit of the present invention;

[0037] Fig.13 It is a schematic diagram of the split structure of the threaded ring column of the present invention;

[0038] Fig.14 It is a schematic diagram of the structure of a plurality of separation blocks B and a plurality of separation blocks A in the pre-drilling state of the present invention;

[0039] Fig.15 It is a schematic structural diagram of a plurality of separation blocks B and a plurality of separation blocks A in a hole-turning form according to the present invention.

[0040] Description of the numbers in the figure:

[0041] 1. Stamping equipment; 2. Mounting seat; 3. Rotating mechanism; 4. Hole turning mechanism;

[0042] 21. Installation slot A; 22. Circular slot; 23. Rotation slot; 24. Slide slot A; 25. Slide slot B; 26. Installation slot B;

[0043] 31. Planetary assembly; 311. Motor A; 312. Coupling A; 313. Sun gear; 314. Planetary ring; 315. Planetary gear; 3151. Gear groove; 316. Friction plate; 317. Internal gear ring;

[0044] 32. Clamping assembly; 321. Motor B; 322. Clamping block; 323. Friction block; 324. Threaded sleeve; 324. Sleeve; 325. Screw;

[0045] 41. Coupling B; 42. Threaded ring column; 421. Oblique guide groove A; 422. Arc guide groove A; 423. Oblique guide groove B; 424. Arc guide groove B; 425. Oblique ball groove; 426. Arc ball groove; 427. Ball block A; 43. Outer sleeve; 431. Lifting groove; 432. Eccentric groove; 44. Expanding block; 441. Movable ball groove; 45. Lifting block; 451. Ball block B; 46. Pre-drill bit; 461. Movable groove; 462. Centripetal guide groove; 463. Centripetal slide groove; 47. Separation block B; 471. Movable column B; 48. Separation block A; 481. Movable column A; 482. Variable diameter slider. DETAILED DESCRIPTION

[0046] like Figures 1 to 15 As shown, the present invention relates to a hole-turning and punching device for a car seat, comprising a punching device 1, a mounting seat 2, a rotating mechanism 3 and a hole-turning mechanism 4.

[0047] In the embodiment of the present invention, the stamping device 1 is a prior art and will not be described in detail herein.

[0048] In an embodiment of the present invention, Figure 3 and Figure 5 As shown, the mounting seat 2 is fixed to the movable end of the stamping equipment 1, a mounting groove A21 is provided at the top of the mounting seat 2, a circular groove 22 is provided at the bottom of the mounting seat 2, a rotating groove 23 is provided at the top of the circular groove 22, a slide groove A24 is provided on one side of the rotating groove 23, a slide groove B25 is provided at one end of the slide groove A24 away from the slide groove A24, and a mounting groove B26 is provided on one side of the mounting seat 2 relative to the slide groove B25.

[0049] In an embodiment of the present invention, Figure 4 As shown, the rotating mechanism 3 includes a planetary assembly 31 and a pressing assembly 32 .

[0050] like Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown, the planetary assembly 31 includes a motor A311, a coupling A312, a sun gear 313, a planetary ring 314, a planetary gear 315, a friction circular plate 316 and an inner gear ring 317; the motor A311 is fixed on the mounting groove A21, the coupling A312 is rotatably arranged on the rotating groove 23, the top end of the coupling A312 penetrates into the mounting groove A21 and is fixedly connected to the output shaft of the motor A311, the sun gear 313 is arranged at the bottom end of the rotating groove 23 and is rotatably connected to the coupling A312, the planetary ring 314 is rotatably arranged on the rotating groove 23, a plurality of gear grooves 3151 are provided in an annular equidistant structure on the planetary ring 314, the planetary gear 315 is rotatably arranged on the gear groove 3151 through a rotating rod, the friction circular plate 316 is fixedly arranged on the top end of the planetary ring 314, and the inner gear ring 317 is fixedly arranged on the circular groove 22. The present invention arranges the structure of the planetary assembly 31 as described above, so that the output shaft of the motor A311 is controlled to rotate by an external control mechanism, and the connecting shaft A312 rotates. When the sun gear 313 rotates, it drives a plurality of planetary gears 315 to perform planetary revolution along the inner gear ring 317, causing the sun gear 313 and the planetary ring 314 to rotate differentially.

[0051] like Figure 4 , Figure 5 and Figure 6 As shown, the clamping assembly 32 includes a motor B321, a clamping block 322, a friction block 323, a threaded sleeve 324 and a screw rod 325;

[0052] Motor B321 is fixed on the mounting groove B26, the clamping block 322 is slidably arranged on the slide groove A24, the friction block 323 is embedded in the clamping block 322, the friction block 323 and the friction circular plate 316 are frictionally matched, the threaded sleeve 324 is slidably arranged on the slide groove B25 and is fixedly connected to the clamping block 322, the screw rod 325 is rotatably arranged on the slide groove B25 and is threadedly connected to the threaded sleeve 324, and the end of the screw rod 325 close to the motor B321 is inserted into the mounting groove B26 and is fixedly connected to the output shaft of the motor B321. The present invention uses the above-mentioned structural setting of the clamping assembly 32 to control the rotation of the output shaft of the motor B321 through an external control mechanism, and the screw 325 rotates relative to the threaded sleeve 324, so that the clamping block 322 drives the friction block 323 to slide on the slide groove A24, and the threaded sleeve 324 slides on the slide groove B25. When the friction block 323 is in compression contact with the friction circular plate 316, the friction force makes the friction circular plate 316 and the planetary ring 314 unable to rotate. When the friction block 323 is disengaged from the friction circular plate 316, the friction circular plate 316 and the planetary ring 314 can rotate.

[0053] In the embodiment of the present invention, the hole-turning mechanism 4 includes a connecting shaft B41, a threaded ring column 42, an outer sleeve 43, a hole-expanding block 44, a lifting block 45, a pre-drilling bit 46, a separation block B47 and a separation block A48;

[0054] The connecting shaft B41 is fixed to the bottom end of the connecting shaft A312;

[0055] The threaded ring column 42 is sleeved on the connecting shaft A312 and fixedly connected to the sun gear 313. The bottom end of the threaded ring column 42 is provided with a plurality of inclined guide grooves A421 in an annular equidistant structure. The eccentric end of the inclined guide groove A421 is provided with an arc guide groove A422. The arc guide groove A422 and the inclined guide groove A421 constitute a variable diameter channel A. An inclined guide groove B423 is provided in the gap between any two adjacent inclined guide grooves A421. The eccentric end of the inclined guide groove B423 is provided with an arc guide groove B424. The arc guide groove B424 and the inclined guide groove B423 constitute a variable diameter channel B. The top of the inclined guide groove B423 is provided with an inclined ball groove 425. The eccentric end of the inclined ball groove 425 is provided with an arc ball groove 426 arranged in an inclined structure. The arc ball groove 426 is connected to the arc guide groove B424. The arc ball groove 426 is connected to the inclined ball groove 425 to form a lifting channel. A ball block A427 is movably connected in the lifting channel.

[0056] The outer sleeve 43 is sleeved on the threaded ring column 42 and fixedly connected to the planetary ring 314. A plurality of lifting grooves 431 are formed on the inner edge surface of the outer sleeve 43 in an equidistant structure. A plurality of eccentric grooves 432 are formed on the outer edge surface of the outer sleeve 43. The plurality of eccentric grooves 432 are respectively connected to the plurality of lifting grooves 431.

[0057] There are a plurality of reaming blocks 44, which are slidably disposed on a plurality of eccentric grooves 432, respectively. The reaming blocks 44 are adapted to the outer sleeve 43 in shape, and an inclined guide surface A is provided at one end of the reaming block 44 close to the lifting block 45, and a movable ball groove 441 is provided along the surface of the reaming block 44 close to the lifting block 45;

[0058] There are a plurality of lifting blocks 45, which are slidably disposed on a plurality of lifting grooves 431, respectively. The plurality of lifting blocks 45 are threadedly connected to the threaded ring column 42, and an inclined guide surface B is provided at one end of the lifting block 45 close to the hole expansion block 44, and the lifting block 45 is movably connected to the movable ball groove 441 through a ball block B451;

[0059] Among them, the movable ball groove 441 is composed of an inclined guide groove and a vertical guide groove. Through the above arrangement, the present invention makes it possible that when the sun gear 313 and the planetary ring 314 rotate differentially, the outer sleeve 43 and the threaded ring column 42 rotate differentially, so that the lifting block 45 rotates and rotates relative to the threaded ring column 42, so that the lifting block 45 is lifted and lowered on the lifting groove 431, so that the ball block B451 moves on the movable ball groove 441, so that the reaming block 44 slides on the eccentric groove 432, and when the reaming block 44 slides in the eccentric direction in the eccentric groove 432, it is used to reaming the hole after the pre-drilling of the pre-drilling bit 46, and the present invention is designed to be composed of an inclined guide groove and a vertical guide groove, so that when the ball block B451 moves on the movable ball groove 441, the diameter of the reaming unit formed by a plurality of reaming blocks 44 remains unchanged when the whole rotates, which is used to improve the accuracy of the inner diameter of the reaming after reaming.

[0060] The pre-drilling bit 46 is fixed at the bottom end of the connecting shaft B41. The top of the pre-drilling bit 46 is annular and has a plurality of movable grooves 461 at equal intervals. The bottom of the movable groove 461 has a centripetal guide groove 462. The gap between any two movable grooves 461 has a centripetal slide groove 463.

[0061] There are a number of separation blocks B47, which are slidably disposed on a number of movable grooves 461, respectively. A movable column B471 is rotatably disposed on the separation block B47, and both ends of the movable column B471 are movably connected to the centripetal guide groove 462 and the variable diameter channel B, respectively. The top end of the movable column B471 penetrates into the lifting channel and is fixedly connected to the ball block A427.

[0062] There are a plurality of separation blocks A48, which are movably arranged in the gap between the threaded ring column 42 and the pre-drilling bit 46 in an annular structure with equal spacing. The top of the separation block A48 is rotatably connected with a movable column A481, which is movably connected with the diameter-changing channel A. The bottom of the separation block A48 is fixedly provided with a diameter-changing slider 482, which is slidably connected with the centripetal slide 463. The present invention is configured as above. Figure 8As shown, it is the initial form of the hole-turning mechanism 4 of the present invention, a plurality of separation blocks A48 and a plurality of separation blocks B47 are in an upper and lower structure, and a plurality of separation blocks A48 are all in the gap between the threaded ring column 42 and the pre-drill bit 46, a plurality of separation blocks B47 are on a plurality of movable grooves 461, and together with the pre-drill bit 46, form a pre-drilling form, and the separation blocks B47 are respectively slidably arranged in a plurality of movable grooves 461, so that the rotation of the connecting shaft A312 drives the connecting shaft B41 and the pre-drill bit 46 to rotate, and when the pre-drill bit 46 and the threaded ring column 42 rotate relatively, the gap position between the centripetal guide groove 462 and the variable diameter channel B changes, thereby changing the position of the plurality of separation blocks B47, and at the same time, the gap position between the centripetal slide groove 463 and the variable diameter channel A changes, thereby changing the gap position of the plurality of separation blocks A48, specifically, when the connecting shaft B41 moves on the oblique guide groove B423, the ball block A427 moves on the oblique ball groove 425, so that the plurality of separation blocks B 47 performs expansion or contraction movement. At the same time, the movable column A481 moves on the inclined guide groove A421, so that the several separation blocks A48 perform expansion or contraction movement. When the connecting shaft B41 moves on the arc guide groove B424, the gaps of the several separation blocks A48 and the gaps of the several separation blocks B47 reach the maximum and remain unchanged. At this time, the gaps between any two separation blocks A48 and the corresponding movable grooves 461 constitute a lifting channel. The ball block A427 moves on the arc ball groove 426. Since the inclined ball groove 425 is arranged in an inclined structure, the ball block A427 drives the separation block B47 to rise and fall through the movable column B471, and the positions of the several separation blocks A48 remain unchanged. When the ball block A427 moves to the end of the arc ball groove 426, the separation block A48 and the separation block B47 are in the same plane, and the several separation blocks A48 and the several separation blocks B47 form an annular plane structure, so that the hole-turning mechanism 4 forms a hole-turning shape as a whole.

[0063] Working principle: This embodiment provides a punching device for automobile seats. When in use, the initial pre-drilling form of the punching mechanism 4 is used to pre-punch the automobile seat parts;

[0064] At this time, when the friction block 323 is squeezed and contacted with the friction circular plate 316, the friction force makes the friction circular plate 316 and the planetary ring 314 unable to rotate; the output shaft of the motor A311 is controlled to rotate by the external control mechanism, so that the plurality of separation blocks A48 and the plurality of separation blocks B47 form an annular plane structure, so that the hole-turning mechanism 4 as a whole forms a hole-turning shape, and the ring formed by the plurality of separation blocks A48 and the plurality of separation blocks B47 is in rotational contact with the hole-turning gap of the die, and the hole-turning mechanism 4 as a whole and the hole-turning gap of the die form a hole-turning cavity;

[0065] The output shaft of the motor B321 is controlled to rotate by an external control mechanism, at which time the friction block 323 is separated from the friction plate 316, and the friction force enables the friction plate 316 and the planetary ring 314 to rotate;

[0066] The output shaft of the motor A311 is controlled to rotate through an external control mechanism, so that the pre-drill bit 46, because at this time, the ball block A427 moves to the end of the arc ball groove 426, and therefore, the pre-drill bit 46 drives the threaded ring column 42 to rotate formally through a plurality of movable columns B471 and a plurality of movable columns A481, so that the sun gear 313 and the planetary ring 314 rotate differentially, and the outer sleeve 43 and the threaded ring column 42 rotate differentially, so that the lifting block 45 rotates and rotates relative to the threaded ring column 42, so that the reaming block 44 slides along the eccentric direction of the eccentric groove 432 while revolving, and reaming the pre-drilled hole; when the ball block B451 moves on the movable ball groove 441, the reaming unit formed by the plurality of reaming blocks 44 rotates as a whole, and the diameter remains unchanged, so as to improve the accuracy of the inner diameter of the hole after reaming and reduce subsequent grinding.

[0067] The embodiments of the present invention disclose preferred embodiments, but are not limited thereto. A person skilled in the art can easily understand the spirit of the present invention based on the above embodiments and make different extensions and changes. However, as long as they do not deviate from the spirit of the present invention, they are all within the protection scope of the present invention.

Claims

1. A punching device for a car seat, characterized in that: It comprises a punching device (1), wherein a mounting seat (2) is provided at a movable end of the punching device (1), and a rotating mechanism (3) for driving a hole-turning mechanism (4) to work is provided on the mounting seat (2); The hole-turning mechanism (4) comprises a pre-drilling head (46) connected to the output end of the rotating mechanism (3), and a plurality of separation blocks B (47) arranged on the pre-drilling head (46) in an annular structure with equal spacing; a plurality of separation blocks A (48) arranged in an annular structure with equal spacing are arranged on the top of the pre-drilling head (46); a plurality of hole-expanding blocks (44) arranged in an annular structure with equal spacing are also arranged on the top of the plurality of separation blocks A (48); A plurality of the expansion blocks (44) can simultaneously perform expansion or contraction movements; A plurality of the separation blocks A (48) and a plurality of the separation blocks B (47) can simultaneously expand or contract; When the plurality of separation blocks A (48) and the plurality of separation blocks B (47) are contracted to a minimum gap, the plurality of separation blocks A (48) and the plurality of separation blocks B (47) are in an up-and-down structure and together with the pre-drilling bit (46) form a pre-drilling shape; when the plurality of separation blocks B (47) are expanded to a maximum gap, they can move upward, so that the plurality of separation blocks A (48) and the plurality of separation blocks B (47) form an annular plane structure, so that the hole-turning mechanism (4) as a whole forms a hole-turning shape.

2. The hole punching device for a car seat according to claim 1, characterized in that: The top of the mounting seat (2) is provided with a mounting groove A (21), the bottom of the mounting seat (2) is provided with a circular groove (22), the top of the circular groove (22) is provided with a rotating groove (23), one side of the rotating groove (23) is provided with a sliding groove A (24), the end of the sliding groove A (24) away from the sliding groove A (24) is provided with a sliding groove B (25), and one side of the mounting seat (2) is provided with a mounting groove B (26) at a position opposite to the sliding groove B (25).

3. The hole punching device for a car seat according to claim 2, characterized in that: The rotating mechanism (3) comprises a planetary assembly (31) and a pressing assembly (32); the planetary assembly (31) comprises a motor A (311), a connecting shaft A (312), a sun gear (313), a planetary ring (314), a planetary gear (315), a friction disk (316) and an inner gear ring (317); the motor A (311) is fixedly mounted on the mounting groove A (21); the connecting shaft A (312) is rotatably mounted on the rotating groove (23); the top end of the connecting shaft A (312) penetrates into the mounting groove A (21) and is in contact with the motor A (311) ) is fixedly connected to the output shaft, the sun gear (313) is arranged at the bottom end of the rotating groove (23) and is rotatably connected to the connecting shaft A (312), the planetary ring (314) is rotatably arranged on the rotating groove (23), the planetary ring (314) is provided with a plurality of gear grooves (3151) in an annular structure with equal spacing, the planetary gear (315) is rotatably arranged on the gear groove (3151) through a rotating rod, the friction circular plate (316) is fixedly arranged on the top end of the planetary ring (314), and the inner gear ring (317) is fixedly arranged on the circular groove (22); The clamping assembly (32) comprises a clamping block (322) and a friction block (323); the clamping block (322) is slidably disposed on the slide groove A (24); the friction block (323) is embedded in the clamping block (322); and the friction block (323) is frictionally matched with the friction circular plate (316).

4. The hole punching device for a car seat according to claim 3, characterized in that: The clamping assembly (32) also includes a motor B (321), a threaded sleeve (324) and a screw (325); the motor B (321) is fixedly mounted on the mounting groove B (26); the threaded sleeve (324) is slidably mounted on the slide groove B (25) and is fixedly connected to the clamping block (322); the screw (325) is rotatably mounted on the slide groove B (25) and is threadedly connected to the threaded sleeve (324); one end of the screw (325) close to the motor B (321) penetrates into the mounting groove B (26) and is fixedly connected to the output shaft of the motor B (321).

5. The hole punching device for a car seat according to claim 4, characterized in that: The hole-turning mechanism (4) further comprises a connecting shaft B (41), a threaded ring column (42), an outer sleeve (43) and a lifting block (45); The connecting shaft B (41) is fixedly arranged at the bottom end of the connecting shaft A (312); the threaded ring column (42) is sleeved on the connecting shaft A (312) and is fixedly connected to the sun gear (313); the outer sleeve (43) is sleeved on the threaded ring column (42) and is fixedly connected to the planetary ring (314); a plurality of lifting grooves (431) are provided on the inner edge surface of the outer sleeve (43) in an equidistant structure; a plurality of eccentric grooves (432) are provided on the outer edge surface of the outer sleeve (43); the plurality of eccentric grooves (432) are respectively connected to the plurality of lifting grooves (431); a plurality of lifting blocks (45) are provided; the plurality of lifting blocks (45) are respectively slidably arranged on the plurality of lifting grooves (431); and the pre-drill bit (46) is fixedly arranged at the bottom end of the connecting shaft B (41).

6. The hole punching device for a car seat according to claim 5, characterized in that: The bottom end of the threaded ring column (42) is provided with a plurality of inclined guide grooves A (421) in an annular structure with equal spacing, the eccentric end of the inclined guide groove A (421) is provided with an arc guide groove A (422), the arc guide groove A (422) and the inclined guide groove A (421) form a variable diameter channel A, and an inclined guide groove B (423) is provided in the gap between any two adjacent inclined guide grooves A (421), the eccentric end of the inclined guide groove B (423) is provided with an arc guide groove B (424), the arc guide groove B The inclined guide groove (424) and the inclined guide groove B (423) form a variable diameter channel B, the top of the inclined guide groove B (423) is provided with an inclined ball groove (425), the eccentric end of the inclined ball groove (425) is provided with an arc ball groove (426) arranged in an inclined structure, the arc ball groove (426) is connected to the arc guide groove B (424), the arc ball groove (426) and the inclined ball groove (425) are connected to form a lifting channel, and a ball block A (427) is movably connected in the lifting channel.

7. The hole punching device for a car seat according to claim 6, characterized in that: A plurality of the hole-expanding blocks (44) are respectively slidably arranged on a plurality of the eccentric grooves (432), the hole-expanding blocks (44) are adapted in shape to the outer sleeve (43), and an inclined guide surface A is provided at one end of the hole-expanding block (44) close to the lifting block (45), and a movable ball groove (441) is provided along the surface of one end of the hole-expanding block (44) close to the lifting block (45), and a plurality of the lifting blocks (45) are threadedly connected to the threaded ring column (42), and an inclined guide surface B is provided at one end of the lifting block (45) close to the hole-expanding block (44), and the lifting block (45) and the movable ball groove (441) are movably connected through a ball block B (451).

8. The hole punching device for a car seat according to claim 7, characterized in that: The movable ball groove (441) is composed of an inclined guide groove and a vertical guide groove.

9. The hole punching device for a car seat according to claim 8, characterized in that: The top of the pre-drilling bit (46) is provided with a plurality of movable grooves (461) in an annular structure with equal spacing, the bottom of the movable groove (461) is provided with a centripetal guide groove (462), and the gap between any two movable grooves (461) is provided with a centripetal slide groove (463); A plurality of separation blocks B (47) are respectively slidably arranged on a plurality of movable grooves (461), and a movable column B (471) is rotatably arranged on the separation block B (47), and both ends of the movable column B (471) are respectively movably connected to the centripetal guide groove (462) and the variable diameter channel B, and the top end of the movable column B (471) penetrates into the lifting channel and is fixedly connected to the ball block A (427).

10. The hole punching device for a car seat according to claim 9, characterized in that: A plurality of separation blocks A (48) are movably arranged in a gap between the threaded ring column (42) and the pre-drill bit (46) in an annular equidistant structure; a movable column A (481) is rotatably connected to the top of the separation block A (48); the movable column A (481) is movably connected to the variable diameter channel A; a variable diameter slider (482) is fixedly provided at the bottom of the separation block A (48); the variable diameter slider (482) is slidably connected to the centripetal slide groove (463).

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