Parking pawl production tool

Abstract

The utility model discloses a parking pawl production tool which comprises an upper forming mechanism and a lower forming mechanism. The upper forming mechanism comprises an upper forming template and a blanking punch, the blanking punch comprises a base and a punch head, the base is in threaded connection with the upper forming template, a central screw hole and surrounding screw holes are formed in the base, the axis of the central screw hole coincides with the central axis of the punch head, and a plurality of surrounding screw holes are distributed around the central screw hole; and the surrounding screw holes are symmetrically distributed relative to the punch, so that the base is uniformly stressed, the stress concentration of the base is avoided, and the problem of punching breakage during punching of the thick plate is prevented. The lower forming mechanism comprises a lower forming template, a female die inlet block and an ejection block, a female die through groove is formed in the lower forming template, the female die inlet block is assembled in the female die through groove, the female die inlet block is provided with an ejection through groove which is the same as the pawl in outer contour shape and size, the ejection block is assembled in the ejection through groove, the outer contour of the lower forming template is circular, and the ejection block is assembled in the ejection through groove. And the punched thick plate can be conveniently taken out.

Description

Technical Field

[0001] This utility model belongs to the technical field of parking pawl production molds, specifically relating to a parking pawl production tooling. Background Art

[0002] A parking pawl is a component that actuates a ratchet in an intermittent motion. Driven by a connecting rod, the pawl reciprocates, causing the ratchet to move in one direction. The pawl engages with the ratchet, locking it in one direction and preventing it from moving in the opposite direction. Parking pawls are used in braking systems. When lifting a heavy object, to stop the pull at a certain position, the pawl engages with the ratchet. Then, a friction plate is pulled in, controlling the five-tooth long shaft to achieve a braking effect. Parking pawls are generally 10.0mm or thicker, belonging to thick plate stamping in the precision stamping industry, which presents a high degree of stamping difficulty.

[0003] Currently, parking pawls on the market are generally imported from abroad or manufactured by joint ventures. The main difficulty is that when blanking thick plates, the blanking punch is prone to impact breakage, causing damage to the blanking punch. Long-term stamping operations will also cause stamping damage to the lower die holder and easily cause downtime in the stamping and cutting process, increasing the stamping operation cost. Utility Model Content

[0004] To address the aforementioned shortcomings, this utility model provides a parking pawl production fixture. By rationally designing the thread layout of the blanking punch base, the base is subjected to uniform force, avoiding force concentration and preventing breakage of the blanking punch during the stamping of thick plates, effectively protecting the blanking punch. A die insert is provided to limit the movement of the thick plate. The die insert is assembled with the lower forming mechanism, facilitating replacement or maintenance of the die insert and reducing equipment damage caused by stamping thick plates. Furthermore, by installing an ejector block within the die insert, the stamped pawl can be easily ejected to the outside, resulting in a high degree of automation.

[0005] This utility model is achieved through the following technical solution:

[0006] A parking pawl production fixture includes an upper forming mechanism and a lower forming mechanism. The upper forming mechanism includes an upper forming template and a blanking punch. The blanking punch includes a base and a punch head. The base is threadedly connected to the upper forming template. The base has a central threaded hole and surrounding threaded holes. The axis of the central threaded hole coincides with the central axis of the punch head. Multiple surrounding threaded holes are distributed around the central threaded hole, and these surrounding threaded holes are symmetrically distributed relative to the punch head to ensure even force distribution on the base and avoid force concentration, thereby preventing stamping breakage during the stamping of thick plates. The lower forming mechanism includes a lower forming template, a die entry block, and an ejector block. The lower forming template has a die through slot, and the die entry block is assembled in the die through slot. The die entry block has an ejector through slot with the same shape and size as the outer contour of the pawl. The ejector block is assembled in the ejector through slot. The outer contour of the lower forming template is circular, facilitating the removal of the stamped thick plate.

[0007] Furthermore, a first oil groove is provided on the side wall of the ejector channel, and a second oil groove is provided on the outer side wall of the ejector block. When the ejector block moves in the ejector channel, the first oil groove and the second oil groove can be connected and disconnected to realize the movement control of the ejector block.

[0008] Furthermore, the lower forming template and the mother mold insert are provided with a first oil injection channel that is interconnected with each other, and the first oil injection channel is connected to the ejector slot.

[0009] Furthermore, the second oil groove penetrates the ejector block vertically to connect the oil passages on the top and bottom surfaces of the ejector block.

[0010] Furthermore, the lower forming mechanism also includes a lower pad, which is located on the lower end face of the lower forming template. The lower pad has an oil drain channel from its side wall toward the center, and the oil drain channel is connected to the second oil groove. Therefore, the lubricating oil can flow in a timely manner, and the lubrication and cooling effects are good.

[0011] Furthermore, the upper forming mechanism includes an ejector plate located between the upper forming template and the lower forming template. The ejector plate has a punch groove that mates with the punch. At the opening of the punch groove, the lower end face of the ejector plate has a first annular protrusion with the same shape and size as the outer contour of the pawl. The cross-sectional shape of the first annular protrusion is a V-shape with the tip pointing outwards. At the opening of the ejection slot, the upper end face of the die insert has a second annular protrusion with the same shape and size as the outer contour of the pawl. The cross-sectional shape of the second annular protrusion is also a V-shape with the tip pointing outwards. Therefore, by using upper and lower V-shaped rings, materials can be clamped in both directions, reducing the phenomenon of product corner collapse.

[0012] Furthermore, the ejector plate has a second oil injection channel extending outward from its side wall towards the center, and a third oil groove is provided in the wall of the punch groove. The third oil groove is connected to the second oil injection channel and penetrates the ejector plate vertically.

[0013] Furthermore, the length, width, and height ratio of the base is (5-6):(2-3):1. Compared with the existing base, this base is wider and thicker, which increases the structural strength of the base, increases the load-bearing area of ​​the base, and improves the compressive strength of the base.

[0014] Furthermore, the thread size of the center screw hole is M8, and the thread size of the surrounding screw hole is M10.

[0015] The beneficial effects of this utility model are:

[0016] This application rationally sets the screw hole layout of the base of the blanking punch, with the screw holes arranged around the central screw hole. The outer contour shape of the punch is the same as the outer contour shape of the pawl. The screw holes are symmetrically distributed along the outer contour of the punch, that is, the screw holes are symmetrically distributed along the outer contour of the punch around the central screw hole. This makes the base bear the force evenly, avoids the force of the base being concentrated at a certain point when stamping thick plates, increases the reliability of the base, and effectively solves the problem of blanking punch breakage that occurs when stamping thick plates. Attached Figure Description

[0017] Figure 1 A top view of the unloading punch, illustrating an illustrative embodiment of a parking pawl production tooling according to this utility model.

[0018] Figure 2 A front view of the blanking punch, illustrating an illustrative embodiment of a parking pawl production tooling of this utility model.

[0019] Figure 3 A cross-sectional view illustrating one embodiment of a parking pawl production tooling according to the present invention;

[0020] Figure 4 A perspective view illustrating a schematic embodiment of a parking pawl production tooling according to the present invention;

[0021] Figure 5 Used to explain Figure 4 Enlarged view of a portion of point A in the middle;

[0022] Figure 6 A perspective view of the ejector plate used to illustrate an illustrative embodiment of a parking pawl production tooling according to this utility model.

[0023] Figure 7 A perspective view of the master mold insert block, used to illustrate an embodiment of a parking pawl production tooling of this utility model.

[0024] Figure 8 A perspective view of the ejector block used to illustrate an illustrative embodiment of a parking pawl production tooling according to this utility model.

[0025] List of components and reference numerals:

[0026] 1. Upper forming mechanism; 11. Upper forming template; 12. Blanking punch; 121. Base; 1211. Center screw hole; 1212. Circular screw hole; 122. Punch; 13. Unloading plate; 131. Punch groove; 132. First annular protrusion; 133. Second oil injection channel; 134. Third oil groove; 2. Lower forming mechanism; 21. Lower forming template; 211. Mold through groove; 22. Mold insert block; 221. Second annular protrusion; 222. Ejection through groove; 2221. First oil groove; 23. Ejection block; 231. Second oil groove; 24. First oil injection channel; 25. Lower pad; 251. Oil drain channel. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] It should be noted that the directional terms such as left, right, up, down, front, and back in the embodiments of this utility model are only relative concepts or are based on the normal use state of the product, i.e., the direction of the product's movement, and should not be considered as limiting.

[0029] In addition, it should be noted that the dynamic terms such as "relative motion" mentioned in the embodiments of this utility model not only refer to changes in position, but also include movements such as rotation and rolling in which the position does not change relative to the position, but the state changes.

[0030] Finally, it should be noted that when a component is said to be "located on" or "set on" another component, it can be on the other component or may have an intervening component at the same time. When a component is said to be "connected to" another component, it can be directly connected to the other component or may have an intervening component at the same time.

[0031] like Figures 1 to 8The parking pawl production fixture shown includes an upper forming mechanism 1 and a lower forming mechanism 2. The upper forming mechanism 1 includes an upper forming template 11 and a blanking punch 12. The blanking punch 12 includes a base 121 and a punch 122. The base 121 is connected to the upper forming template by threads. The base 121 has a central screw hole 1211 and surrounding screw holes 1212. The axis of the central screw hole 1211 coincides with the central axis of the punch 122. Multiple surrounding screw holes 1212 are distributed around the central screw hole 1211 and are symmetrically distributed relative to the punch 122 to ensure that the base 121 is subjected to uniform force and avoids force concentration on the base 121, thereby preventing stamping breakage problems when stamping thick plates. The lower forming mechanism 2 includes a lower forming template 21, a female mold entry block 22, and an ejector block 23. The lower forming template 21 has a female mold through slot 211. The female mold entry block 22 is assembled in the female mold through slot 211. The female mold entry block 22 has an ejector through slot 222 that is the same as the outer contour shape and size of the pawl. The ejector block 23 is assembled in the ejector through slot 222. The outer contour of the lower forming template is circular, which facilitates the removal of the thick plate after the stamping is completed.

[0032] In one embodiment, the present application rationally sets the screw hole layout of the base 121 of the blanking punch 12. The surrounding screw holes 1212 surround the central screw hole 1211. The outer contour shape of the punch 122 is the same as the outer contour shape of the pawl. The surrounding screw holes 1212 are symmetrically distributed along the outer contour of the punch 122. Thus, the surrounding screw holes 1212 are symmetrically distributed around the central screw hole 1211 along the outer contour of the punch 122, so that the base 121 is subjected to uniform force. This avoids the force on the base 121 being concentrated on a certain point or several points during the stamping of thick plates, increases the safety of the base 121, and effectively solves the problem of the blanking punch 12 breaking during the stamping of thick plates.

[0033] In one embodiment, an outer hoop is provided around the lower forming template. The outer hoop is fastened to the outer wall of the lower forming template to provide auxiliary reinforcement to the lower forming template 21, improve the compressive strength of the lower forming template 21, and extend the service life of the lower forming template 21.

[0034] In one embodiment, the mold insert 22 can be made of ASP2005 powder metallurgy steel, which can improve the strength of the mold insert 22 itself, reduce the probability of the mold insert 22 breaking, and improve its service life.

[0035] In one embodiment, the cutting edge of the mother mold entry block 22 adopts a C-corner to rounded corner design to improve the material flow at the cutting edge, ensure a bright sheared surface of the product, and reduce the double shearing and tearing phenomena in the parking pawl functional area.

[0036] Preferably, the side wall of the ejector channel 222 is provided with a first oil groove 2221, and the outer side wall of the ejector block 23 is provided with a second oil groove 231. When the ejector block 23 moves in the ejector channel 222, the first oil groove 2221 and the second oil groove 231 can be connected and disconnected to realize the movement control of the ejector block 23.

[0037] In one embodiment, the mold has oil channels, which improves the lubrication between the ejector block 23 and the mold insert block 22, helping to cool and lubricate the product and reduce the shearing and tearing phenomena in the parking pawl functional area.

[0038] Preferably, the lower forming template 21 and the female mold entry block 22 are provided with a first oil injection channel 24 that is interconnected with each other, and the first oil injection channel 24 is connected to the ejection channel 222.

[0039] Preferably, the second oil groove 231 extends vertically through the ejector block 23 to connect the oil passages on the top and bottom surfaces of the ejector block 23.

[0040] Preferably, the lower forming mechanism 2 further includes a lower pad 25, which is located on the lower end face of the lower forming template 21. The lower pad 25 has an oil drain channel 251 extending from its side wall toward the center. The oil drain channel 251 is connected to the second oil groove 231. Therefore, the lubricating oil can flow in a timely manner, resulting in good lubrication and cooling effects.

[0041] Preferably, the upper forming mechanism 1 includes an ejector plate 13, located between the upper forming template 11 and the lower forming template 21. The ejector plate 13 has a punch groove 131 that mates with the punch 122. At the opening of the punch groove 131, the lower end face of the ejector plate 13 has a first annular protrusion 132 with the same shape and size as the outer contour of the pawl. The cross-sectional shape of the first annular protrusion 132 is a V-shape with the tip pointing outwards. At the opening of the ejection slot 222, the upper end face of the die insert block 22 has a second annular protrusion 221 with the same shape and size as the outer contour of the pawl. The cross-sectional shape of the second annular protrusion 221 is also a V-shape with the tip pointing outwards. Therefore, by using upper and lower V-shaped rings, materials can be clamped in both directions, reducing the phenomenon of product corner collapse.

[0042] Preferably, the ejector plate 13 has a second oil injection channel 133 extending outward from its side wall toward the center, and the punch groove 131 has a third oil groove 134 on its groove wall. The third oil groove 134 is connected to the second oil injection channel 133 and penetrates the ejector plate 13 in the vertical direction.

[0043] In one embodiment, the third oil groove 134 extends vertically to both end faces of the ejector plate 13. This effectively cools and lubricates the ejector plate 13 and the punch 122, reducing the likelihood of the punch 122 breaking.

[0044] Preferably, the length, width, and height ratio of the base 121 is (5-6):(2-3):1. Compared with the existing base 121, this base 121 is wider and thicker, which increases the structural strength of the base 121, increases the load-bearing area of ​​the base 121, and improves the compressive strength of the base 121.

[0045] Preferably, the thread size of the central screw hole 1211 is M8, and the thread size of the surrounding screw hole 1212 is M10.

[0046] When the above-mentioned parking pawl production tooling is used, by reasonably setting the thread layout of the base 121 of the blanking punch 12, the base 121 is subjected to uniform force, avoiding the concentration of force on the base 121, preventing the blanking punch 12 from breaking during the stamping of thick plates, and effectively protecting the blanking punch 12.

[0047] The above description is merely an embodiment of this application and is not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A parking pawl production tooling, characterized in that, include: The upper forming mechanism includes an upper forming template and a blanking punch. The blanking punch includes a base and a punch head. The base is connected to the upper forming template by a thread. The base has a central screw hole and a surrounding screw hole. The axis of the central screw hole coincides with the central axis of the punch head. Multiple surrounding screw holes are distributed around the central screw hole and are symmetrically distributed relative to the punch head. The lower forming mechanism includes a lower forming template, a female mold inlet block, and an ejector block. The lower forming template has a female mold through slot. The female mold inlet block is assembled in the female mold through slot. The female mold inlet block has an ejector through slot with the same shape and size as the outer contour of the pawl. The ejector block is assembled in the ejector through slot. The outer contour of the lower forming template is circular.

2. The parking pawl production tooling according to claim 1, characterized in that, The side wall of the ejector channel is provided with a first oil groove, and the outer side wall of the ejector block is provided with a second oil groove. When the ejector block moves in the ejector channel, the first oil groove and the second oil groove can be connected and disconnected.

3. The parking pawl production tooling according to claim 2, characterized in that, The lower forming template and the mother mold insert are provided with a first oil injection channel that is interconnected with each other, and the first oil injection channel is connected to the ejection slot.

4. A parking pawl production tooling according to claim 2, characterized in that, The second oil groove penetrates the ejector block in the vertical direction.

5. A parking pawl production tooling according to claim 4, characterized in that, The lower forming mechanism also includes a lower pad, which is located on the lower end face of the lower forming template. The lower pad has an oil drain channel extending from its side wall toward the center, and the oil drain channel is connected to the second oil tank.

6. A parking pawl production tooling according to claim 1, characterized in that, The upper forming mechanism includes an ejector plate located between the upper forming template and the lower forming template. The ejector plate has a punch groove that mates with the punch. The lower end face of the ejector plate has a first annular protrusion at the opening of the punch groove, which has the same shape and size as the outer contour of the pawl. The cross-sectional shape of the first annular protrusion is a V-shape with the tip pointing outwards. The upper end face of the die insert has a second annular protrusion at the opening of the ejector slot, which has the same shape and size as the outer contour of the pawl. The cross-sectional shape of the second annular protrusion is a V-shape with the tip pointing outwards.

7. A parking pawl production tooling according to claim 6, characterized in that, The ejector plate has a second oil injection channel extending outward from its side wall towards the center, and the punch groove has a third oil groove in its groove wall. The third oil groove is connected to the second oil injection channel and penetrates the ejector plate vertically.

8. A parking pawl production tooling according to claim 1, characterized in that, The length, width, and height ratio of the base is (5-6):(2-3):

1.

9. A parking pawl production tooling according to claim 1, characterized in that, The thread size of the central screw hole is M8, and the thread size of the surrounding screw hole is M10.

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