Cold heading die for forming force limiting rod

Abstract

The utility model discloses a cold heading die for forming a force limiting rod, which belongs to the field of cold heading dies and comprises an upper die, a lower die corresponding to the upper die, an inserting mechanism mounted on the surface of the lower die, a clamping mechanism mounted in the lower die and a releasing mechanism mounted on the surface of the clamping mechanism. Through cooperative use of the devices and arrangement of a clamping mechanism, a cold heading inner core is clamped in a mounting groove, when the cold heading inner core needs to be replaced, a threaded rod is rotated, so that a supporting block and a sliding plate do not limit an abutting disc any more, the cold heading inner core is pushed, and the abutting disc moves downwards synchronously; through the elastic force of the reset spring, the overturning plate drives the clamping block to reset, so that the clamping block is not connected with the inserting groove any more, the clamping block does not limit the cold heading inner core any more, and the cold heading inner core of the cold heading mold for forming the force limiting rod is more convenient to disassemble.

Description

Technical Field

[0001] This utility model relates to the field of cold heading mold technology, specifically a cold heading mold for forming force limiting bars. Background Technology

[0002] When a vehicle is involved in a collision, the force limiter undergoes torsional deformation to absorb energy under the immense pressure of the seatbelt. At the same time, it causes the seatbelt to continue to release several centimeters after locking, extending the time that the seatbelt exerts force on the human body and reducing the stress applied to the body, thus effectively preventing the seatbelt from strangling the body.

[0003] In the production process of force limiters, cold heading equipment is required to process the force limiters, so cold heading molds are needed.

[0004] A cold heading die is a mold used on a cold heading machine to cut, pre-form, and shape a blank into a cold-formed part.

[0005] Most existing cold heading dies used for forming force limiters require the installation of a cold heading die core that meets processing requirements. The force limiter is then processed through this core. However, replacing the core in most existing cold heading dies for forming force limiters generally requires changing the disassembly tools. This makes core replacement inconvenient and reduces efficiency, thus affecting the usability of the cold heading die.

[0006] Therefore, this utility model provides a cold heading die for forming force-limiting rods to solve the above problems. Utility Model Content

[0007] This utility model provides a cold heading die for forming force limiting bars, aiming to solve the problems mentioned in the background art, such as the fact that when replacing the inner core of the existing cold heading die for forming force limiting bars, it is generally necessary to replace the corresponding disassembly tools. The replacement of the inner core of the cold heading die is inconvenient, which reduces the efficiency of the inner core replacement and affects the use of the cold heading die.

[0008] To achieve the above objectives, this utility model provides the following technical solution: a cold heading mold for forming a force-limiting rod, comprising an upper mold, a lower mold corresponding to the upper mold, an insertion mechanism installed on the surface of the lower mold, a snap-fit ​​mechanism installed inside the lower mold, and a release mechanism installed on the surface of the snap-fit ​​mechanism;

[0009] The release mechanism includes two support blocks disposed on the surface of the locking mechanism, a sliding plate mounted on the lower surface of the support blocks, a hollow box disposed on the surface of the sliding plate, a threaded rod disposed in the hollow box and connected to the sliding plate, a connecting rod disposed on the surface of the threaded rod, and a sleeve mounted on the surface of the connecting rod. The connecting rod and the sleeve are both disposed inside the lower mold. One end of the threaded rod passes through the lower mold and is provided with a knob. The hollow box is disposed on the inner wall of the lower mold.

[0010] Furthermore, in the above-mentioned cold heading mold for forming force limiting rods, the insertion mechanism includes an installation groove disposed in the middle of the lower mold and a cold heading inner core installed inside the installation groove, wherein the surface of the cold heading inner core is provided with insertion grooves in a rectangular array.

[0011] Furthermore, in the aforementioned cold heading mold for forming force limiting rods, the insertion mechanism includes two insertion rods respectively inserted into corresponding insertion slots and a movable rod disposed at one end of the insertion rods, wherein the movable rod is disposed inside the mounting slot.

[0012] Furthermore, in the aforementioned cold heading mold for forming a force-limiting rod, the snap-fit ​​mechanism includes a flip plate disposed inside the mounting groove via a rotating shaft, a return spring disposed on the surface of the flip plate and connected to the inner wall of the mounting groove, and a linkage block attached to the flip plate and connected to the moving rod, wherein the sleeve is disposed on the surface of the flip plate.

[0013] Furthermore, in the above-mentioned cold heading mold for forming force limiting rods, the snap-fit ​​mechanism further includes a clamping plate disposed on opposite sides of the two flip plates, an elastic rod arranged in a ring array on the lower surface of the clamping plate and connected to the bottom wall of the mounting groove, and a snap-fit ​​block disposed on the inner side of the flip plate and corresponding to the insertion groove, wherein the clamping plate corresponds to the cold heading core.

[0014] Furthermore, in the cold heading mold for forming the force limiting rod described above, two limiting rings corresponding to the cold heading inner core are symmetrically arranged inside the mounting groove, and a guide plate installed inside the lower mold is provided on the surface of the moving rod.

[0015] Beneficial effects

[0016] By using a snap-fit ​​mechanism, the cold heading core is snapped into the mounting slot. When the cold heading core needs to be replaced, the threaded rod is rotated so that the support block and sliding plate no longer limit the clamping plate. The cold heading core is pushed, causing the clamping plate to move downwards synchronously. The spring force of the return spring causes the flipping plate to reset the snap-fit ​​block, so that the snap-fit ​​block is no longer connected to the insertion slot and no longer limits the cold heading core. This makes it easier to disassemble the cold heading core of the cold heading mold used for forming the force limiter.

[0017] The rotation of the threaded rod drives the sliding plate to move, which in turn pushes the connecting rod to move. The sleeve design causes the connecting rod to pull the rotating plate to rotate, preventing the rotating plate from being reset by the return spring. This ensures that when the clamping plate is reset by the elastic rod, the rotating plate will not obstruct the reset of the clamping plate. Furthermore, the reverse rotation of the threaded rod ensures that the clamping plate and the rotating plate reset synchronously, facilitating the installation of the cold heading core and making the cold heading mold used for force limiting rod forming more convenient to use. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of a cold heading die used for forming force-limiting bars;

[0019] Figure 2 This is a schematic diagram of the second form of a cold heading die for forming force-limiting bars;

[0020] Figure 3 This is a schematic diagram of the insertion mechanism in a cold heading die used for forming force-limiting bars;

[0021] Figure 4 This is a schematic diagram of a snap-fit ​​mechanism in a cold heading die used for forming force-limiting bars;

[0022] Figure 5 This is a schematic diagram of the release mechanism in a cold heading die used for forming force-limiting rods.

[0023] In the picture:

[0024] 1. Upper mold; 2. Lower mold; 3. Support block; 4. Sliding plate; 5. Hollow box; 6. Threaded rod; 7. Connecting rod; 8. Sleeve; 9. Mounting groove; 10. Cold heading inner core; 11. Insertion groove; 12. Insertion rod; 13. Moving rod; 14. Guide plate; 15. Flipping plate; 16. Return spring; 17. Linkage block; 18. Clamping plate; 19. Elastic rod; 20. Snap-fit ​​block; 21. Limiting ring. Detailed Implementation

[0025] 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.

[0026] This utility model provides a cold heading die for forming force-limiting rods, such as... Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, a cold heading die for forming a force-limiting rod includes an upper die 1, a lower die 2 corresponding to the upper die 1, an insertion mechanism mounted on the surface of the lower die 2, a locking mechanism mounted inside the lower die 2, and a release mechanism mounted on the surface of the locking mechanism. The upper die 1 presses the lower die 2, thereby forming the material inside the lower die 2 into a force-limiting rod.

[0027] The release mechanism includes two support blocks 3 set on the surface of the snap-fit ​​mechanism, a sliding plate 4 installed on the lower surface of the support block 3, a hollow box 5 set on the surface of the sliding plate 4, a threaded rod 6 set on the hollow box 5 and connected to the sliding plate 4, a connecting rod 7 set on the surface of the threaded rod 6, and a sleeve 8 installed on the surface of the connecting rod 7. The connecting rod 7 and the sleeve 8 are both set inside the lower mold 2. One end of the threaded rod 6 passes through the lower mold 2 and is equipped with a knob. The setting of the knob makes it easier to rotate the threaded rod 6. The hollow box 5 is set on the inner wall of the lower mold 2.

[0028] When the cold heading inner core 10 needs to be replaced, the threaded rod 6 is rotated, causing the support block 3 and the sliding plate 4 to move, no longer limiting the clamping plate 18, thereby pushing the cold heading inner core 10, causing the clamping plate 18 to move downward, compressing the elastic rod 19, so that the clamping plate 18 no longer limits the flipping plate 15. Thus, through the setting of the reset spring 16, the flipping plate 15 drives the locking block 20 to reset, so that the locking block 20 is no longer inserted into the insertion slot 11, so that the locking block 20 no longer limits the cold heading inner core 10, and the cold heading inner core 10 can be pulled out of the mounting slot 9, making it more convenient to replace the cold heading inner core 10.

[0029] For example, the insertion mechanism includes an installation groove 9 disposed in the middle of the lower mold 2 and a cold-forged inner core 10 installed inside the installation groove 9. The interior of the installation groove 9 is symmetrically provided with two limiting rings 21 corresponding to the cold-forged inner core 10. The surface of the cold-forged inner core 10 is provided with insertion grooves 11 in a rectangular array.

[0030] By inserting the cold heading inner core 10 into the mounting slot 9 and limiting the position of the cold heading inner core 10 by the limiting ring 21, the insertion position of the cold heading inner core 10 is more accurate, avoiding the displacement of the cold heading inner core 10 during insertion, which would affect the effect of cold heading.

[0031] The insertion mechanism includes two insertion rods 12 that are respectively inserted into the corresponding insertion slots 11, and a movable rod 13 disposed at one end of the insertion rod 12. The surface of the movable rod 13 is provided with a guide plate 14 installed inside the lower mold 2, and the movable rod 13 is disposed inside the mounting slot 9.

[0032] By setting the insertion slot 11, the insertion rod 12 is inserted into the surface of the cold-forged inner core 10 through the insertion slot 11, limiting the cold-forged inner core 10, thereby making the cold-forged inner core 10 more stable during use. Furthermore, by setting the guide plate 14, when the flip plate 15 pushes the linkage block 17 to move, the moving rod 13 moves synchronously, causing the moving rod 13 to drive the insertion rod 12 to disengage from the cold-forged inner core 10, thereby allowing the cold-forged inner core 10 to be disassembled. When the moving rod 13 moves, it slides inside the guide plate 14, thereby making the moving rod 13 more stable during movement, and making the insertion rod 12 more precise in limiting and releasing the cold-forged inner core 10.

[0033] For example, the snap-fit ​​mechanism includes a flip plate 15 disposed inside the mounting groove 9 via a rotating shaft, a return spring 16 disposed on the surface of the flip plate 15 and connected to the inner wall of the mounting groove 9, and a linkage block 17 attached to the flip plate 15 and connected to the moving rod 13, with the sleeve 8 disposed on the surface of the flip plate 15.

[0034] By setting the clamping plate 18, the clamping plate 18 is squeezed when the cold heading inner core 10 is inserted into the mounting groove 9, causing the clamping plate 18 to slide inside the mounting groove 9, thereby causing the clamping plate 18 to push the flipping plate 15 to rotate, causing the flipping plate 15 to drive the snap-fit ​​block 20 to be inserted into the insertion groove 11, thereby limiting the cold heading inner core 10 and allowing the cold heading inner core 10 to be installed inside the lower mold 2.

[0035] The snap-fit ​​mechanism also includes a clamping plate 18 disposed on opposite sides of the two flip plates 15, an elastic rod 19 arranged in a ring array on the lower surface of the clamping plate 18 and connected to the bottom wall of the mounting groove 9, and a snap-fit ​​block 20 disposed on the inner side of the flip plate 15 and corresponding to the insertion groove 11. The clamping plate 18 corresponds to the cold heading inner core 10.

[0036] The rotation of the threaded rod 6 drives the sliding plate 4 to move, thereby removing the limiting effect of the sliding plate 4 on the clamping plate 18. This allows the clamping plate 18 to push the cold-forged inner core 10 downward. After the clamping plate 18 moves below the sliding plate 4, the threaded rod 6 is rotated in the opposite direction, causing the sliding plate 4 to reset and limit the clamping plate 18. This prevents the clamping plate 18 from resetting due to the elastic force of the elastic rod 19, which would also reset the flipping plate 15 and the snap-fit ​​block 20, thus affecting the disassembly of the cold-forged inner core 10.

[0037] After the cold-forged inner core 10 is removed from the mounting slot 9, the sliding plate 4 slides inside the hollow box 5 by continuing to rotate the threaded rod 6. When it slides to the moving position, the sliding plate 4 is in contact with the connecting rod 7, thereby driving the connecting rod 7 to move, causing the sleeve 8 to move accordingly. This causes the sleeve 8 to pull one side of the flip plate 15 open, and then the clamping plate 18 automatically resets due to the elastic force of the elastic rod 19. The flip plate 15 will not obstruct the reset of the clamping plate 18.

[0038] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A cold heading die for forming force-limiting bars, characterized in that: The cold heading die for forming the force limiter includes an upper die (1), a lower die (2) corresponding to the upper die (1), an insertion mechanism installed on the surface of the lower die (2), a snap-fit ​​mechanism installed inside the lower die (2), and a release mechanism installed on the surface of the snap-fit ​​mechanism. The release mechanism includes two support blocks (3) disposed on the surface of the snap-fit ​​mechanism, a sliding plate (4) installed on the lower surface of the support blocks (3), a hollow box (5) disposed on the surface of the sliding plate (4), a threaded rod (6) disposed on the hollow box (5) and connected to the sliding plate (4), a connecting rod (7) disposed on the surface of the threaded rod (6), and a sleeve (8) disposed on the surface of the connecting rod (7). The connecting rod (7) and the sleeve (8) are both disposed inside the lower mold (2). One end of the threaded rod (6) passes through the lower mold (2) and is provided with a knob. The hollow box (5) is disposed on the inner wall of the lower mold (2).

2. The cold heading die for forming a force-limiting rod according to claim 1, characterized in that: The insertion mechanism includes an installation groove (9) located in the middle of the lower mold (2) and a cold heading inner core (10) installed inside the installation groove (9). The surface of the cold heading inner core (10) is provided with insertion grooves (11) in a rectangular array.

3. A cold heading die for forming a force-limiting rod according to claim 2, characterized in that: The insertion mechanism includes two insertion rods (12) that are respectively inserted into the corresponding insertion slots (11) and a movable rod (13) disposed at one end of the insertion rods (12). The movable rod (13) is disposed inside the mounting slot (9).

4. A cold heading die for forming a force-limiting rod according to claim 3, characterized in that: The snap-fit ​​mechanism includes a flip plate (15) disposed inside the mounting groove (9) via a rotating shaft, a reset spring (16) disposed on the surface of the flip plate (15) and connected to the inner wall of the mounting groove (9), and a linkage block (17) attached to the flip plate (15) and connected to the moving rod (13). The sleeve (8) is disposed on the surface of the flip plate (15).

5. A cold heading die for forming a force-limiting rod according to claim 4, characterized in that: The snap-fit ​​mechanism further includes a clamping plate (18) disposed on opposite sides of the two flip plates (15), an elastic rod (19) arranged in a ring array on the lower surface of the clamping plate (18) and connected to the bottom wall of the mounting groove (9), and a snap-fit ​​block (20) disposed on the inner side of the flip plate (15) and corresponding to the insertion groove (11). The clamping plate (18) corresponds to the cold heading inner core (10).

6. A cold heading die for forming a force-limiting rod according to claim 3, characterized in that: The mounting groove (9) has two limiting rings (21) symmetrically arranged inside, corresponding to the cold heading inner core (10), and the surface of the moving rod (13) is provided with a guide plate (14) installed inside the lower mold (2).

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