Hole forming apparatus for automotive interior material and automotive interior material

Abstract

This invention provides a hole-making apparatus (100) for automotive interior materials, comprising: a base frame (11); a fixing frame (12) disposed on the base frame (11) for fixing the automotive interior material to be drilled; an active drill bit (16); a plurality of driven drill bits (17) disposed side by side with the active drill bit (16); and an actuating part (18) connected to the active drill bit (16) for moving the active drill bit (16) in a vertical direction, wherein the plurality of driven drill bits (17) are configured to be able to move in conjunction with the active drill bit (16), such that the vertical movement of the active drill bit (16) can drive the driven drill bits (17) to move in a vertical direction. The hole-making apparatus of this invention can improve hole-making efficiency and has strong adaptability, preventing cracking of automotive interior materials during multi-hole drilling.

Description

Technical Field

[0001] This invention relates to the field of drilling or punching technology, and more particularly to drilling with a tool or a multi-drill tool. Specifically, it relates to a drilling device for automotive interior materials and automotive interior materials. Background Technology

[0002] For the installation of automotive interior materials, snap-fit ​​and screw-fastening methods are the most common. Snap-fit ​​methods typically involve injection molding a special structure into the interior trim piece, which is then fitted onto the automotive structural components using snap-fit ​​parts. Screw-fastening methods require pre-drilling holes in the interior trim piece before installation using screws. Therefore, for interior trim pieces installed using screw-fastening methods, drilling equipment is needed to complete the drilling process.

[0003] Drilling holes in automotive interior parts requires careful consideration of drilling efficiency. Generally, multiple holes need to be formed around the outer perimeter of the part, especially for large components. Several spaced-apart screw holes are needed on the same side of the part for stable mounting. A single drill bit can only drill one hole at a time, resulting in low processing efficiency. While multiple drill bits can be connected and work together, this is impractical because: in real-world use, it's not always necessary for multiple drill bits to work simultaneously. Sometimes multiple drill bits are needed to improve efficiency, while other times only one or a portion of the drill bits are required. Using drill bits in a row and operating simultaneously is not always desirable. Furthermore, automotive interior parts are often irregularly shaped, for example, one side may be longer than another. This requires a different number of mounting holes for different sides. Connecting multiple drill bits is only suitable for drilling on a specific side. To complete all drilling work, hole preparation tools need to be changed, meaning a single machine cannot meet the needs.

[0004] Furthermore, in actual production practice, drilling with multiple drill bits simultaneously can easily lead to cracking of automotive interior parts. This is because a greater force is applied to the automotive interior parts at the same time. Moreover, after drilling with conventional drill bits, the diameter of the holes will shrink due to the fact that automotive interior parts are mostly injection molded parts with a certain degree of elasticity, resulting in a deviation between the size of the holes and the expected size. In addition, severe burrs may appear around the holes. Summary of the Invention

[0005] The purpose of this invention is to at least partially overcome the deficiencies of the prior art and provide a hole-making device for automotive interior materials.

[0006] Another objective of this invention is to provide a hole-making device for automotive interior materials, which can improve hole-making efficiency.

[0007] Another objective of this invention is to provide a hole-making device for automotive interior materials, thereby increasing the applicability and adaptability of a single hole-making device.

[0008] Another objective of this invention is to provide a hole-making device for automotive interior materials, which can prevent cracking of automotive interior materials during multi-hole drilling.

[0009] Another objective of this invention is to provide a drilling device for automotive interior materials, thereby improving drilling quality.

[0010] To achieve the above-mentioned objectives or one of them, the technical solution of the present invention is as follows:

[0011] A hole-making device for automotive interior materials, characterized in that the hole-making device comprises:

[0012] Base frame;

[0013] A mounting bracket, set on a base frame, is used to secure the automotive interior material for which holes are to be drilled;

[0014] An active drill bit;

[0015] Multiple driven drill bits are arranged side by side with the driving drill bit; and

[0016] An actuator, connected to the active drill bit, is used to move the active drill bit vertically.

[0017] The plurality of driven drill bits are configured to be linked with the active drill bit, such that the movement of the active drill bit in the vertical direction can drive the driven drill bit to move in the vertical direction.

[0018] The drilling equipment also includes a drill bit holder, which is fixedly mounted on a base frame. The drill bit holder is provided with a mounting base, and the active drill bit and multiple driven drill bits are directly or indirectly mounted on the mounting base.

[0019] The drilling equipment further includes a drill bit mounting plate for mounting the active drill bit and multiple driven drill bits. The drill bit mounting plate includes:

[0020] A substrate, the substrate being configured to be connected to a mounting base;

[0021] Vertical panels are installed along the vertical direction;

[0022] Multiple sets of slide rails are set on a vertical plate, and each of the active drill bit and multiple driven drill bits is set on a set of slide rails.

[0023] According to a preferred embodiment of the present invention, the plurality of slide rails are arranged at equal intervals on the vertical plate; or

[0024] The multiple sets of slide rails are arranged at non-equidistant intervals on the vertical plate according to the predetermined hole spacing.

[0025] According to a preferred embodiment of the present invention, the hole-making device further includes an active drill bit mounting part and a plurality of driven drill bit mounting parts, wherein the active drill bit is mounted on a drill bit mounting plate through the active drill bit mounting part, and the driven drill bits are mounted on the drill bit mounting plate through the driven drill bit mounting parts;

[0026] The hole-making equipment also includes a linkage plate, and the active drill bit mounting part and multiple driven drill bit mounting parts are configured to be detachably connected to the linkage plate.

[0027] According to a preferred embodiment of the present invention, each of the active drill bit mounting portion and the plurality of driven drill bit mounting portions is provided with a locking component, the locking component comprising:

[0028] A threaded rod, connected to the active drill bit mounting part or the driven drill bit mounting part;

[0029] An elliptical block is fitted onto the threaded rod;

[0030] A nut, screwed onto the lower end of a threaded rod; and

[0031] A spring is positioned between the elliptical block and the nut.

[0032] The linkage plate has multiple notches, the elliptical block corresponds to the notch, and the elliptical block can rotate around the threaded rod so that the elliptical block can pass through the notch in the first state and abut against the lower edge of the notch in the second state.

[0033] According to a preferred embodiment of the present invention, the locking assembly further includes an anti-rotation washer disposed between the nut and the spring;

[0034] The threaded rod is a flat threaded rod, and the anti-rotation washer has a flat hole in the center that mates with the flat threaded rod;

[0035] The anti-rotation washer has a protrusion or groove on the side facing the nut, and the nut has a groove or protrusion on the side facing the anti-rotation washer.

[0036] According to a preferred embodiment of the present invention, a recess is provided on the lower surface of the linkage plate, the recess being located at the edge of the notch; when the elliptical block is in the second state and abuts against the lower edge of the notch, the recess accommodates the elliptical block.

[0037] According to a preferred embodiment of the present invention, each of the active drill bit and the driven drill bit includes a drill pipe assembly, the drill pipe assembly comprising:

[0038] The drill pipe has an inward-recessed section at its lower end.

[0039] Arc-shaped elements are fitted onto the recessed section; and

[0040] The tapered portion, located on the underside of the arc-shaped element, is screwed onto the recessed section.

[0041] The outer diameter of the arc-shaped element gradually increases and then gradually decreases along the longitudinal axis of the drill rod, and the maximum outer diameter of the arc-shaped element is greater than the maximum outer diameter of the tapered portion.

[0042] According to another aspect of the present invention, an automotive interior material is provided, said automotive interior material being manufactured by a perforation apparatus for automotive interior materials as described in any of the foregoing embodiments.

[0043] The drilling apparatus for automotive interior materials provided by this invention arranges multiple drill bits side-by-side, dividing them into active and passive drill bits. The active drill bit is connected to an actuator and can move vertically under the control of the actuator. The passive drill bit has no actuator connected to it and is configured to move in conjunction with the active drill bit, so that the forward and backward movement of the active drill bit can drive the passive drill bit to move forward and backward together. In this way, multiple drill bits can be used to drill holes in automotive interior parts simultaneously, improving drilling efficiency. Furthermore, thanks to the design of the linkage plate and locking assembly, the passive drill bit can be linked with the active drill bit or not, depending on the operator's needs. When drilling multiple holes simultaneously, the passive drill bit can be set to be linked with the active drill bit; when drilling multiple holes simultaneously is not required, the passive drill bit can be set to not be linked with the active drill bit, increasing user selectivity. When desired linkage occurs, the operator simply twists the elliptical block to align its major axis with the longitudinal direction of the notch on the linkage plate, pulls the block down over the notch, rotates it 90 degrees, and releases it. The elliptical block, pushed by the spring, then rests against the lower edge of the notch on the linkage plate. At this point, the driven drill bit corresponding to the elliptical block is connected to the linkage plate and can be linked by the plate. When unwanted linkage occurs, the operator rotates the elliptical block 90 degrees to align its major axis with the longitudinal direction of the notch on the linkage plate. The elliptical block, under the spring's force, moves upward over the notch. Since the lateral dimension of the notch is larger than the minor axis of the elliptical block, the block no longer interacts with the linkage plate, meaning the driven drill bit is not connected and no longer links with the plate. Therefore, the specific structural design of the locking component provides flexibility to the driven drill bit, allowing it to be used or not, thus increasing the applicability and adaptability of the single drilling device.

[0044] Furthermore, it should be noted that the present invention provides a specially designed drill bit mounting plate, which includes a base plate, a vertical plate, and multiple sets of slide rails. Each drill bit is connected to a set of slide rails through a drill bit mounting part. The drill bit mounting part can slide along the slide rails, which helps to realize the linkage of the drill bits. The drill bit mounting plate can be used as a modular component, and multiple drill bit mounting plates can be provided. The spacing between adjacent slide rail sets on it can be different. When the hole spacing to be drilled changes, only the drill bit mounting plate needs to be replaced. For example, for a batch of automotive interior parts, both the first and second sides require drilling. The hole spacing on the first side is uniform. In this case, a drill bit mounting plate with the same spacing between adjacent slide rail groups can be used. The active drill bit mounting part and multiple driven drill bit mounting parts are respectively installed on each slide rail group. Then, the drill bit mounting plate is fixed to the mounting base, and drilling is performed. After all the first sides are drilled, the second side is drilled. The hole spacing on the second side is non-uniform (it can be any hole spacing). At this time, the drill bit mounting plate is replaced with a drill bit mounting plate with the corresponding spacing, and the same installation and drilling steps are performed to obtain the desired second side holes. The corresponding drill bit mounting plate can be prefabricated according to the drilling requirements of each batch of automotive interior parts, without the need to change the drilling equipment or drill bits for different drilling needs. Therefore, the drilling equipment of the present invention has greater practicality.

[0045] The active drill bit of the present invention can have the same configuration as the driven drill bit, and it can also have a locking component. The locking component can have the same structure as the locking component corresponding to the driven drill bit. The linkage plate is sandwiched between the elliptical block of the locking component and the active drill bit mounting part. When the active drill bit mounting part moves downward, it directly pushes the linkage plate downward. The linkage plate presses down on the elliptical block corresponding to the driven drill bit. The elliptical block acts on the spring, nut, and threaded rod with a downward force, thereby giving the driven drill bit mounting part a downward force. It can be seen that the force applied by the driven drill bit to the automotive interior parts is elastic in the initial stage, which is advantageous, as it provides a certain buffer and prevents large forces from acting on the interior parts, causing the interior parts to crack.

[0046] Furthermore, the locking assembly of the present invention includes an anti-rotation washer fitted onto a threaded rod, which is a flat threaded rod. The anti-rotation washer has a flat hole at its center that mates with the flat threaded rod. Simultaneously, the side of the anti-rotation washer facing the nut has a protrusion or groove, and the side of the nut facing the anti-rotation washer also has a groove or protrusion. In this way, the nut cannot rotate freely around the threaded rod, and the elastic force of multiple driven drill bits can be set uniformly by screwing the nut in the same number of turns. As long as they are set initially, the nut will not rotate on its own during use, and the elastic force will not change. Therefore, the force exerted by each driven drill bit on the interior trim will also be the same.

[0047] Advantageously, the active and driven drill bits of the present invention employ the same drill rod assembly, which specifically includes an arcuate element and a tapered portion. The arcuate element is fitted onto the recessed section at the lower end of the drill rod, and the tapered portion is located below the arcuate element and screwed onto the recessed section. In this way, when the drill bit moves downward, a small hole is first drilled in the automotive interior trim, and then the hole is gradually enlarged to prevent the initial hole from being too large and causing cracking of the automotive interior trim. When the drill bit moves upward, the hole wall is enlarged a second time, which on the one hand prevents material rebound from reducing the hole diameter, and on the other hand achieves the effect of deburring. The arcuate element can be removed by unscrewing the tapered portion. Therefore, the arcuate element of the present invention is replaceable. When drilling holes of different diameters is required, this can be achieved by replacing the arcuate element without replacing the entire drill bit. Attached Figure Description

[0048] Figure 1 This is a schematic diagram of a hole-making apparatus for automotive interior materials according to an embodiment of the present invention;

[0049] Figure 2 This is a partial structural diagram of a hole-making apparatus for automotive interior materials according to an embodiment of the present invention;

[0050] Figure 3 This is a partially enlarged view of a hole-making device for automotive interior materials according to an embodiment of the present invention, showing the non-connected state of the elliptical block and the linkage plate, i.e., the non-linkage state, the first state;

[0051] Figure 4 This is a partially enlarged view of a hole-making device for automotive interior materials according to an embodiment of the present invention, showing the combined state of the elliptical block and the linkage plate, i.e., the linkage state and the second state.

[0052] Figure 5 A schematic diagram of a drill bit mounting plate for a drilling device for automotive interior materials according to an embodiment of the present invention;

[0053] Figure 6 A schematic diagram of a drill bit mounting plate for a drilling device for automotive interior materials according to another embodiment of the present invention;

[0054] Figure 7 This is a partially enlarged view of the linkage plate of a hole-making device for automotive interior materials according to an embodiment of the present invention;

[0055] Figure 8 An exploded view of a locking assembly of a hole-making device for automotive interior materials according to an embodiment of the present invention;

[0056] Figure 9 This is a schematic diagram of an anti-rotation washer for a hole-making device for automotive interior materials according to an embodiment of the present invention;

[0057] Figure 10 A schematic diagram of a nut for a hole-making device for automotive interior materials according to an embodiment of the present invention;

[0058] Figure 11 This is a schematic diagram of an active drill bit for a drilling device for automotive interior materials according to an embodiment of the present invention;

[0059] Figure 12 A partially enlarged cross-sectional view of a drill rod assembly for a drilling apparatus for automotive interior materials according to an embodiment of the present invention; and

[0060] Figure 13 This is a partially enlarged exploded view of a drill rod assembly for a drilling apparatus for automotive interior materials according to an embodiment of the present invention.

[0061] List of reference numerals in the attached diagram:

[0062] 100 Hole-making equipment; 11 Base frame; 12 Fixing frame; 13 Drill bit holder; 14 Mounting base; 15 Drill bit mounting plate; 16 Active drill bit; 17 Driven drill bit; 18 Actuating part; 19 Active drill bit mounting part; 20 Driven drill bit mounting part; 21 Base plate; 22 Vertical plate; 23 Slide rail; 24 Linkage plate; 25 Locking assembly; 26 Drill rod assembly; 27 Weight reduction groove; 31 Threaded rod; 32 Nut; 33 Anti-rotation washer; 34 Spring; 35 Elliptical block; 36 Notch; 37 Recessed part; 38 Round hole; 41 Flat hole; 42 Protrusion; 43 Threaded hole; 44 Groove; 51 Housing; 52 Motor shaft; 53 Mounting base; 54 Drill rod; 55 Arc-shaped element; 56 Tapered part; 57 Recessed section; 58 Threaded section. Detailed Implementation

[0063] Exemplary embodiments of the present invention are described in detail below with reference to the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements. Furthermore, in the following detailed description, numerous specific details are set forth for ease of explanation to provide a thorough understanding of the embodiments disclosed herein. However, it will be apparent that one or more embodiments may be practiced without these specific details. In other instances, well-known structures and apparatuses are illustrated to simplify the drawings.

[0064] Figure 1A schematic diagram of a drilling apparatus for automotive interior materials according to an embodiment of the present invention is provided. The drilling apparatus 100 includes: a base frame 11, a fixing frame 12, a drill bit holder 13, a drill bit mounting plate 15, five drill bits, and an actuator 18. The fixing frame 12 is disposed on the base frame 11 and is used to fix the automotive interior material to be drilled. The drill bit holder 13 is fixedly disposed on the base frame 11 and is used to fix the drill bits. The five drill bits include one active drill bit 16 and four driven drill bits 17. The four driven drill bits 17 are arranged side by side with the active drill bit 16. Here, the number of drill bits is merely an example and can be varied. The active drill bit 16 is located in the middle, the two driven drill bits 17 are located to the left of the active drill bit 16, and the two driven drill bits 17 are located to the right of the active drill bit 16. The actuator 18 is connected to the active drill bit 16 and is used to move the active drill bit 16 in the vertical direction. The actuator 18 is mounted on the upper crossbeam of the drill bit holder 13. The actuator 18 is a hydraulic cylinder. The telescopic arm of the hydraulic cylinder is connected to the active drill bit 16, thereby controlling the movement of the active drill bit 16.

[0065] In an embodiment of the present invention, the four driven drill bits 17 are configured to be linked with the active drill bit 16, such that the vertical movement of the active drill bit 16 can drive the driven drill bits 17 to move vertically. Specifically, a mounting base 14 is provided on the drill bit holder 13, and the active drill bit 16 and the four driven drill bits 17 are disposed on the mounting base 14. A drill bit mounting plate 15 is used to mount the active drill bit 16 and the four driven drill bits 17. The drilling device 100 also includes an active drill bit mounting part 19 and four driven drill bit mounting parts 20. The active drill bit 16 is mounted on the drill bit mounting plate 15 through the active drill bit mounting part 19, and the driven drill bits 17 are mounted on the drill bit mounting plate 15 through the driven drill bit mounting parts 20.

[0066] The driving drill bit 16 and the driven drill bit 17 each have a cylindrical housing 51. A drill motor is housed within the housing 51, and the motor shaft 52 of the drill motor extends from the lower end of the housing 51. Each of the driving drill bit 16 and the driven drill bit 17 includes a drill rod assembly 26, which has a mounting base 53 connected to the motor shaft 52. Figure 11As shown. The active drill bit mounting part 19 and the driven drill bit mounting part 20 have the same structure. They are block-shaped and have a central hole. The cylindrical housings 51 of the active drill bit 16 and the driven drill bit 17 are accommodated and fixed in the central hole. One side of the active drill bit mounting part 19 and the driven drill bit mounting part 20 has a slide rail, which cooperates with the slide rail of the drill bit mounting plate 15 (described later). The drill bit mounting plate 15 includes: a base plate 21, which is elongated and configured to connect with the mounting base 14; a vertical plate 22, which is arranged in a vertical direction and extends from the base plate 21; and multiple sets of slide rails 23, which are arranged on the vertical plate 22. Each of the active drill bit 16 and the four driven drill bits 17 is arranged on one set of slide rails 23. Each set of slide rails 23 includes two slide rails 23. The slides of the active drill bit mounting part 19 and the driven drill bit mounting part 20 cooperate with the slide rails 23. The active drill bit mounting part 19 and the driven drill bit mounting part 20 slide on the drill bit mounting plate 15 with damping. When an external force is applied to the active drill bit mounting part 19 and the driven drill bit mounting part 20 and the external force is greater than a predetermined value, the active drill bit mounting part 19 and the driven drill bit mounting part 20 can slide along the slide rails 23. When the external force is released, the active drill bit mounting part 19 and the driven drill bit mounting part 20 are suspended on the slide rails 23. Advantageously, a weight-reducing groove 27 is provided between the two slide rails 23 of each set of slide rails 23 on the drill bit mounting plate 15.

[0067] As mentioned above, each drill bit is equipped with its own independent motor, which is located inside the housing 51. Power and signal lines extend from the upper side of the housing 51 (not shown in the figure) and extend rearward from the space between the drill bit mounting plate 15 and the drill bit holder 13 toward the power supply and controller.

[0068] See Figure 5 The multiple sets of slide rails 23 are arranged at equal intervals on the vertical plate 22. It should be noted that the number of slide rail sets 23 corresponds to the number of drill bits, and the spacing between adjacent slide rails 23 can be selected according to actual drilling requirements. That is, the multiple sets of slide rails 23 are arranged at non-equal intervals on the vertical plate 22 according to the predetermined hole spacing requirements. Figure 6 As shown. Multiple drill bit mounting plates 15 of the present invention can be prefabricated and selectively used during operation. Before drilling holes in a batch of automotive interior parts, drill bit mounting plates 15 can be prefabricated according to the number and location of holes in the batch of automotive interior parts. For example, if the batch of automotive interior parts has four sides, and the first side requires 5 holes, the second side requires 3 holes, and so on, then four drill bit mounting plates 15 can be prepared according to this requirement and the spacing between the holes. The first drill bit mounting plate 15 is used first to prepare the holes on the first side, and then the drill bit mounting plate 15 is replaced to prepare the holes on the other sides.

[0069] According to a preferred embodiment of the present invention, the hole-making device 100 further includes a linkage plate 24, which is elongated. The active drill bit mounting portion 19 and the four driven drill bit mounting portions 20 are configured to be detachably connected to the linkage plate 24. Specifically, each of the active drill bit mounting portion 19 and the four driven drill bit mounting portions 20 is provided with a locking component 25. The locking component 25 includes: a threaded rod 31, which is connected to the active drill bit mounting portion 19 or the driven drill bit mounting portion 20 and is fixedly disposed on the lower surface of the active drill bit mounting portion 19 or the driven drill bit mounting portion 20; an elliptical block 35 having a central circular hole 38 extending vertically, the elliptical block 35 being fitted onto the threaded rod 31, the threaded rod 31 passing through the circular hole 38 without interfering with the circular hole 38; and a nut 32 having... A threaded hole 43 is screwed into the lower end of the threaded rod 31; and a spring 34 is disposed between the elliptical block 35 and the nut 32. The linkage plate 24 has multiple notches 36, and the elliptical block 35 corresponds to each notch 36. The elliptical block 35 can rotate around the threaded rod 31, allowing it to pass through the notch 36 in a first state and rest against the lower edge of the notch 36 in a second state. In the first state, the elliptical block 35 does not interfere with the notch 36 and can move freely within it; this is the non-linkage state. Figure 3 As shown; in the second state, the elliptical block 35 rests against the lower edge of the notch 36, which is the linkage state, as shown. Figure 4 As shown.

[0070] Advantageously, the locking assembly 25 further includes an anti-rotation washer 33 disposed between the nut 32 and the spring 34; the threaded rod 31 is a flat threaded rod, that is, both sides of the threaded rod 31 are cut off, such as Figure 8 As shown, the anti-rotation washer 33 has a flat hole 41 at its center that mates with the flat threaded rod; the anti-rotation washer 33 has a protrusion 43 or a groove on the side facing the nut 32, and the nut 32 has a groove 44 or a protrusion on the side facing the anti-rotation washer 33. Since the threaded rod 31 under each drill bit mounting part is the same, the protrusion 43 of the anti-rotation washer 33 under all drill bit mounting parts can be positioned in the same direction. This allows the spring preload of the locking assembly 25 under all drill bit mounting parts to be the same by limiting the number of rotations of the nut 32.

[0071] Preferably, a recessed portion 37 is provided on the lower surface of the linkage plate 24, the recessed portion 37 being located at the edge of the notch 36; when the elliptical block 35 is in the second state and abuts against the lower edge of the notch 36, the recessed portion 37 accommodates the elliptical block 35. The recessed portion 37 can restrict the rotation of the elliptical block 35, preventing the locking assembly 25 from being unlocked.

[0072] According to a preferred embodiment of the present invention, each of the active drill bit 16 and the driven drill bit 17 includes a drill rod assembly 26, the drill rod assembly 26 comprising: a drill rod 54, the lower end of which is provided with a recessed section 57, the lower end of which has a threaded section 58; an arcuate element 55 sleeved on the recessed section 57; and a tapered portion 56 located below the arcuate element 55 and screwed onto the recessed section 57, wherein the outer diameter of the arcuate element 55 gradually increases and then gradually decreases along the longitudinal axis of the drill rod 54, and the maximum outer diameter of the arcuate element 55 is greater than the maximum outer diameter of the tapered portion 56. The arcuate element 55 can be replaced; it is clamped by the tapered portion 56, i.e., when the tapered portion 56 is tightened, the arcuate element 55 is fixed.

[0073] According to another aspect of the present invention, an automotive interior material is provided, which is manufactured by the hole-making apparatus 100 for automotive interior materials as described in any of the foregoing embodiments.

[0074] The drilling apparatus for automotive interior materials provided by this invention arranges multiple drill bits side-by-side, dividing them into active and passive drill bits. The active drill bit is connected to an actuator and can move vertically under the control of the actuator. The passive drill bit has no actuator connected to it and is configured to move in conjunction with the active drill bit, so that the forward and backward movement of the active drill bit can drive the passive drill bit to move forward and backward together. In this way, multiple drill bits can be used to drill holes in automotive interior parts simultaneously, improving drilling efficiency. Furthermore, thanks to the design of the linkage plate and locking assembly, the passive drill bit can be linked with the active drill bit or not, depending on the operator's needs. When drilling multiple holes simultaneously, the passive drill bit can be set to be linked with the active drill bit; when drilling multiple holes simultaneously is not required, the passive drill bit can be set to not be linked with the active drill bit, increasing user selectivity. When desired linkage occurs, the operator simply twists the elliptical block to align its major axis with the longitudinal direction of the notch on the linkage plate, pulls the block down over the notch, rotates it 90 degrees, and releases it. The elliptical block, pushed by the spring, then rests against the lower edge of the notch on the linkage plate. At this point, the driven drill bit corresponding to the elliptical block is connected to the linkage plate and can be linked by the plate. When unwanted linkage occurs, the operator rotates the elliptical block 90 degrees to align its major axis with the longitudinal direction of the notch on the linkage plate. The elliptical block, under the spring's force, moves upward over the notch. Since the lateral dimension of the notch is larger than the minor axis of the elliptical block, the block no longer interacts with the linkage plate, meaning the driven drill bit is not connected and no longer links with the plate. Therefore, the specific structural design of the locking component provides flexibility to the driven drill bit, allowing it to be used or not, thus increasing the applicability and adaptability of the single drilling device.

[0075] Furthermore, it should be noted that the present invention provides a specially designed drill bit mounting plate, which includes a base plate, a vertical plate, and multiple sets of slide rails. Each drill bit is connected to a set of slide rails through a drill bit mounting part. The drill bit mounting part can slide along the slide rails, which helps to realize the linkage of the drill bits. The drill bit mounting plate can be used as a modular component, and multiple drill bit mounting plates can be provided. The spacing between adjacent slide rail sets on it can be different. When the hole spacing to be drilled changes, only the drill bit mounting plate needs to be replaced. For example, for a batch of automotive interior parts, both the first and second sides require drilling. The hole spacing on the first side is uniform. In this case, a drill bit mounting plate with the same spacing between adjacent slide rail groups can be used. The active drill bit mounting part and multiple driven drill bit mounting parts are respectively installed on each slide rail group. Then, the drill bit mounting plate is fixed to the mounting base, and drilling is performed. After all the first sides are drilled, the second side is drilled. The hole spacing on the second side is non-uniform (it can be any hole spacing). At this time, the drill bit mounting plate is replaced with a drill bit mounting plate with the corresponding spacing, and the same installation and drilling steps are performed to obtain the desired second side holes. The corresponding drill bit mounting plate can be prefabricated according to the drilling requirements of each batch of automotive interior parts, without the need to change the drilling equipment or drill bits for different drilling needs. Therefore, the drilling equipment of the present invention has greater practicality.

[0076] The active drill bit of the present invention can have the same configuration as the driven drill bit, and it can also have a locking component. The locking component can have the same structure as the locking component corresponding to the driven drill bit. The linkage plate is sandwiched between the elliptical block of the locking component and the active drill bit mounting part. When the active drill bit mounting part moves downward, it directly pushes the linkage plate downward. The linkage plate presses down on the elliptical block corresponding to the driven drill bit. The elliptical block acts on the spring, nut, and threaded rod with a downward force, thereby giving the driven drill bit mounting part a downward force. It can be seen that the force applied by the driven drill bit to the automotive interior parts is elastic in the initial stage, which is advantageous, as it provides a certain buffer and prevents large forces from acting on the interior parts, causing the interior parts to crack.

[0077] Furthermore, the locking assembly of the present invention includes an anti-rotation washer fitted onto a threaded rod, which is a flat threaded rod. The anti-rotation washer has a flat hole at its center that mates with the flat threaded rod. Simultaneously, the side of the anti-rotation washer facing the nut has a protrusion or groove, and the side of the nut facing the anti-rotation washer also has a groove or protrusion. In this way, the nut cannot rotate freely around the threaded rod, and the elastic force of multiple driven drill bits can be set uniformly by screwing the nut in the same number of turns. As long as they are set initially, the nut will not rotate on its own during use, and the elastic force will not change. Therefore, the force exerted by each driven drill bit on the interior trim will also be the same.

[0078] Advantageously, the active and driven drill bits of the present invention employ the same drill rod assembly, which specifically includes an arcuate element and a tapered portion. The arcuate element is fitted onto the recessed section at the lower end of the drill rod, and the tapered portion is located below the arcuate element and screwed onto the recessed section. In this way, when the drill bit moves downward, a small hole is first drilled in the automotive interior trim, and then the hole is gradually enlarged to prevent the initial hole from being too large and causing cracking of the automotive interior trim. When the drill bit moves upward, the hole wall is enlarged a second time, which on the one hand prevents material rebound from reducing the hole diameter, and on the other hand achieves the effect of deburring. The arcuate element can be removed by unscrewing the tapered portion. Therefore, the arcuate element of the present invention is replaceable. When drilling holes of different diameters is required, this can be achieved by replacing the arcuate element without replacing the entire drill bit.

[0079] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that variations may be made to these embodiments without departing from the principles and spirit of the invention. The scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A hole-making device (100) for automotive interior materials, characterized in that, The hole-making device (100) includes: a base frame (11); A fixing bracket (12) is set on the base frame (11) and is used to fix the automotive interior material to be drilled; An active drill bit (16); A plurality of driven drill bits (17) are arranged side by side with the active drill bit (16); and an actuator (18) is connected to the active drill bit (16) for moving the active drill bit (16) in a vertical direction, wherein the plurality of driven drill bits (17) are configured to be able to be linked with the active drill bit (16) so that the movement of the active drill bit (16) in a vertical direction can drive the driven drill bits (17) to move in a vertical direction; The hole-making device (100) also includes a drill bit holder (13), which is fixedly mounted on a base frame (11). The drill bit holder (13) is provided with a mounting base (14), and the active drill bit (16) and multiple driven drill bits (17) are directly or indirectly mounted on the mounting base (14). The hole-making device (100) further includes a drill bit mounting plate (15) for mounting the active drill bit (16) and a plurality of driven drill bits (17). The drill bit mounting plate (15) includes a base plate (21) configured to be connected to the mounting base (14). Vertical plate (22) is set along the vertical direction; Multiple sets of slide rails (23) are set on a vertical plate (22), and each of the active drill bit (16) and multiple driven drill bits (17) is set on a set of slide rails (23); The hole-making device (100) further includes an active drill bit mounting part (19) and a plurality of driven drill bit mounting parts (20). The active drill bit (16) is mounted on the drill bit mounting plate (15) through the active drill bit mounting part (19), and the driven drill bit (17) is mounted on the drill bit mounting plate (15) through the driven drill bit mounting parts (20). The hole-making device (100) also includes a linkage plate (24), and the active drill bit mounting part (19) and a plurality of driven drill bit mounting parts (20) are configured to be detachably connected to the linkage plate (24); Each of the active drill bit mounting portion (19) and the plurality of driven drill bit mounting portions (20) is provided with a locking component (25), the locking component (25) comprising: a threaded rod (31) connected to the active drill bit mounting portion (19) or the driven drill bit mounting portion (20); An elliptical block (35) is fitted onto a threaded rod (31); Nut (32), screwed into the lower end of threaded rod (31); and A spring (34) is disposed between an elliptical block (35) and a nut (32). The linkage plate (24) is provided with multiple notches (36). The elliptical block (35) corresponds to the notches (36). The elliptical block (35) can rotate around the threaded rod (31) so that the elliptical block (35) can pass through the notches (36) in the first state and abut against the lower edge of the notches (36) in the second state.

2. The hole making apparatus (100) for automotive interior material as claimed in claim 1 wherein: The multiple sets of slide rails (23) are arranged at equal intervals on the vertical plate (22); or the multiple sets of slide rails (23) are arranged at non-equal intervals on the vertical plate (22) according to the predetermined hole spacing requirements.

3. The hole making apparatus (100) for automotive interior material as claimed in claim 1 wherein: The locking assembly (25) also includes an anti-rotation washer (33) disposed between the nut (32) and the spring (34); The threaded rod (31) is a flat threaded rod, and the anti-rotation washer (33) has a flat hole (41) at the center that mates with the flat threaded rod. The anti-rotation washer (33) has a protrusion (43) or a groove on the side facing the nut (32), and the nut (32) has a groove (44) or a protrusion on the side facing the anti-rotation washer (33).

4. The hole-making apparatus (100) for automotive interior materials according to claim 3, characterized in that: A recessed portion (37) is provided on the lower surface of the linkage plate (24), and the recessed portion (37) is located at the edge of the notch (36); when the elliptical block (35) is in the second state and abuts against the lower edge of the notch (36), the recessed portion (37) accommodates the elliptical block (35).

5. The drilling apparatus (100) for automotive interior materials according to any one of claims 1-4, characterized in that, Each of the active drill bit (16) and the driven drill bit (17) includes a drill rod assembly (26), the drill rod assembly (26) including: a drill rod (54), the lower end of which is provided with a recessed section (57). The arc-shaped element (55) is fitted onto the recessed section (57); and The tapered portion (56) is located on the lower side of the arc-shaped element (55) and is screwed onto the inwardly narrowed section (57). The outer diameter of the arc-shaped element (55) gradually increases and then gradually decreases along the longitudinal axis of the drill rod (54), and the maximum outer diameter of the arc-shaped element (55) is greater than the maximum outer diameter of the tapered portion (56).

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