A special-shaped cross positioning pin

Abstract

A special-shaped cross locating pin includes a locating pin and a base, wherein the locating pin includes a front wing plate and a rear wing plate that are arranged oppositely, and a left wing plate and a right wing plate that are arranged oppositely, wherein the plane on which the left wing plate and the right wing plate are located is consistent with the demolding direction, and the planes on which the front wing plate and the rear wing plate are located are different from the demolding direction, and the bottom ends of the front wing plate, the rear wing plate, the left wing plate and the right wing plate are connected to the top surface of the base, and the rear wing plate is vertically connected to the top surface of the base, and the bottom ends of the left wing plate and the right wing plate are obliquely connected to the top surface of the base, and a seat cavity is provided inside the base. This design not only has different locating pins and demolding directions, but also the mating platform only needs to be perpendicular to the locating pin, and can prevent shrinkage marks from appearing on the surface of the parts, and can reduce the number of sliders.

Description

Technical Field

[0001] The invention relates to a positioning device in a plastic part, belongs to the field of automobile parts, and in particular to a special-shaped cross positioning pin, which is specifically suitable for the situation when the direction of the positioning pin column is different from the direction of the demoulding. Background Art

[0002] In the prior art, a positioning device is required in plastic parts, and the most common ones are positioning pins or a combination of positioning pins and bases. No matter which one, the direction of the positioning pins is consistent with the demolding direction, which requires the surrounding environment parts to be made into a matching platform perpendicular to the demolding direction to match the positioning pins, which will undoubtedly increase the structure of the surrounding plastic parts and increase the difficulty of sheet metal stamping.

[0003] The information disclosed in this background technology section is only intended to increase the understanding of the overall background of this patent application, and should not be regarded as acknowledging or suggesting in any form that the information constitutes the prior art already known to ordinary technicians in this field. Summary of the invention

[0004] The purpose of the present invention is to overcome the defects and problems existing in the prior art that the locating pin and the demolding direction must be consistent, and the matching platform needs to be perpendicular to the demolding direction and the locating pin, and to provide a special-shaped cross locating pin with different locating pins and demolding directions, and the matching platform only needs to be perpendicular to the locating pin.

[0005] To achieve the above purpose, the technical solution of the present invention is: a special-shaped cross positioning pin, including a positioning pin column and a base, wherein the bottom end of the positioning pin column is connected to the top of the base;

[0006] The positioning pin column comprises a front wing plate and a rear wing plate which are arranged opposite to each other, and a left wing plate and a right wing plate which are arranged opposite to each other. The inner sides of the front wing plate, the rear wing plate, the left wing plate and the right wing plate are connected to each other to form a pin inner column. The plane where the left wing plate and the right wing plate are located is consistent with the demolding direction, and the planes where the front wing plate and the rear wing plate are located are different from the demolding direction.

[0007] The bottom ends of the front wing panel, rear wing panel, left wing panel and right wing panel are all connected to the top surface of the base, the rear wing panel is vertically connected to the top surface of the base, the bottom ends of the left wing panel and the right wing panel are obliquely connected to the top surface of the base, and a seat cavity is arranged inside the base.

[0008] A mold bottom angle is formed between the bottom ends of the left wing plate and the right wing plate and the top surface of the base, and the mold bottom angle is an acute angle.

[0009] The front wing plate and the demoulding direction form an acute front pin-direction angle, and the rear wing plate and the demoulding direction form an acute rear pin-direction angle.

[0010] The front wing plate includes a front upper inclined plate and a front lower straight plate, the top end of the front upper inclined plate is connected to the top end of the pin inner column, the bottom end of the front upper inclined plate is vertically connected to the top surface of the base through the front lower straight plate, the front upper inclined plate and the demoulding direction form a front pin direction angle, and the angle between the front upper inclined plate and the front lower straight plate is an obtuse angle;

[0011] The rear wing plate includes a rear outer straight plate, a rear bottom straight plate and a rear inner inclined plate which are connected in sequence. The rear outer straight plate and the rear bottom straight plate are perpendicular to each other. The rear inner inclined plate is connected to the side of the pin inner column. The rear bottom straight plate is fitted and connected to the top surface of the base. A rear pin direction angle is formed between the rear outer straight plate and the demoulding direction, and the rear outer straight plate and the front lower straight plate are parallel to each other.

[0012] The structures of the left wing plate and the right wing plate are consistent, and both include an upper side inclined plate and a lower side straight plate located on the same plane. The top end of the upper side inclined plate is connected to the top end of the pin inner column, the bottom end of the upper side inclined plate is connected to the top end of the lower side straight plate, and the bottom end of the lower side straight plate is obliquely connected to the top surface of the base.

[0013] The base includes a seat side panel and a seat top plate and a seat bottom plate connected to both ends thereof, the top surface of the seat top plate is connected to the bottom ends of the front wing plate, the rear wing plate, the left wing plate and the right wing plate, the seat top plate, the seat side panel and the seat bottom plate together form a concave seat inner cavity, and the seat inner cavity is a one-way opening structure.

[0014] The seat top plate is an inverted L-shaped structure, including a seat top horizontal plate and a seat top vertical plate that are vertically connected to each other. The top surface of the seat top horizontal plate is connected to the bottom ends of the front wing plate, the rear wing plate, the left wing plate, and the right wing plate. A top notch is sandwiched between the seat top horizontal plate and the seat top vertical plate, and the top notch is communicated with the inner cavity of the seat.

[0015] The seat side surround includes a seat rear side surround, a seat middle side surround and a seat front side surround which are connected in sequence. The bottoms of the seat rear side surround, the seat middle side surround and the seat front side surround are all connected to the seat bottom plate. The seat rear side surround and the seat front side surround are arranged opposite to each other, and the seat rear side surround is wider than the seat front side surround.

[0016] The portion of the seat rear side enclosure close to the seat bottom plate is the base root, and the thickness of the base root is narrower than the thickness of other portions of the base.

[0017] The thickness of the base root is one third of the thickness of the portion of the seat rear side enclosure close to the seat top plate.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. A special-shaped cross positioning pin of the present invention includes a positioning pin and a base, wherein the positioning pin includes a front wing plate, a rear wing plate, a left wing plate, and a right wing plate spliced ​​into a cross structure, the plane where the left wing plate and the right wing plate are coexisting is consistent with the demolding direction, and the planes where the front wing plate and the rear wing plate are respectively located are different from the demolding direction. At this time, the matching platform only needs to be perpendicular to the positioning pin, and does not need to be perpendicular to the demolding direction at the same time. Not only can it save the space in the demolding direction on the basis of ensuring the positioning function, but it also reduces the structure of the surrounding plastic parts and reduces the difficulty of sheet metal stamping. Therefore, in the present invention, the positioning pin and the demolding direction are different, and the matching platform only needs to be perpendicular to the positioning pin.

[0020] 2. In a special-shaped cross positioning pin of the present invention, the positioning pin column includes a front wing plate, a rear wing plate, a left wing plate, and a right wing plate spliced ​​into a cross structure, wherein the left wing plate and the right wing plate are arranged opposite to each other, the front wing plate and the rear wing plate are arranged opposite to each other, and the inner sides of the front wing plate, the rear wing plate, the left wing plate, and the right wing plate are connected to each other to form a pin inner column. This four-wing cross-shaped structure can reduce the difficulty of demoulding and improve the efficiency of demoulding. Therefore, the present invention can facilitate demoulding.

[0021] 3. In a special-shaped cross positioning pin of the present invention, the base includes a seat side enclosure and a seat top plate and a seat bottom plate connected to the two ends thereof, wherein the top surface of the seat top plate is connected to the bottom end of the positioning pin column, and the seat top plate, the seat side enclosure, and the seat bottom plate together form a concave seat inner cavity, and the seat inner cavity is a one-way opening structure. This "doghouse" structure can adjust the space size and prevent shrinkage marks from appearing on the surface of the part, especially when the thickness of the base root in the seat side enclosure is narrower than the thickness of the rest of the base, it can prevent shrinkage marks from appearing on the surface of the part. Therefore, the present invention can prevent shrinkage marks from appearing on the surface of the part.

[0022] 4. In a special-shaped cross positioning pin of the present invention, the seat top plate is an inverted L-shaped structure, including a seat top horizontal plate and a seat top vertical plate connected vertically to each other, and a top notch is sandwiched between the seat top horizontal plate and the seat top vertical plate, and the top notch is communicated with the seat inner cavity. This design enables the front lower part of the positioning pin column to communicate with the seat inner cavity in the base, so that the lower slider of the positioning pin column on this side and the base slider are made into a whole, and the slider structure is changed from three commonly used in the prior art to two sliders, which reduces the number of sliders, reduces the cost and the complexity of the process. Therefore, the present invention can reduce the number of sliders, reduce the application cost and the complexity of the process. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of the present invention.

[0024] Figure 2 yes Figure 1 main view.

[0025] Figure 3It is a three-dimensional structural schematic diagram of the present invention.

[0026] Figure 4 It is a structural schematic diagram when the present invention is applied.

[0027] Figure 5 yes Figure 4 Schematic diagram of the structure when viewed from above.

[0028] In the figure: pin inner column 1, positioning pin column 2, base 3, seat inner cavity 30, seat top plate 31, seat top horizontal plate 311, seat top vertical plate 312, top notch 313, seat side enclosure 32, seat rear side enclosure 321, seat middle side enclosure 322, seat front side enclosure 323, seat bottom plate 33, base root 34, front wing plate 4, front pin angle 41, front upper inclined plate 42, front lower straight plate 43, rear wing plate 5, rear pin angle 51, rear outer straight plate 52, rear bottom straight plate 53, rear inner inclined plate 54, left wing plate 6, mold bottom angle 61, right wing plate 7, side upper inclined plate 71, side lower straight plate 72, slider one 8, slider two 9, demolding direction 10, positioning pin column direction 11. DETAILED DESCRIPTION

[0029] The present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0030] See also Figure 1 — Figure 5 , a special-shaped cross positioning pin, comprising a positioning pin column 2 and a base 3, wherein the bottom end of the positioning pin column 2 is connected to the top of the base 3;

[0031] The positioning pin 2 includes a front wing plate 4 and a rear wing plate 5 that are arranged opposite to each other, and a left wing plate 6 and a right wing plate 7 that are arranged opposite to each other. The inner sides of the front wing plate 4, the rear wing plate 5, the left wing plate 6 and the right wing plate 7 are connected to each other to form a pin inner column 1. The plane where the left wing plate 6 and the right wing plate 7 are located is consistent with the demolding direction 10, and the planes where the front wing plate 4 and the rear wing plate 5 are located are different from the demolding direction 10.

[0032] The bottom ends of the front wing panel 4, the rear wing panel 5, the left wing panel 6, and the right wing panel 7 are all connected to the top surface of the base 3, the rear wing panel 5 is vertically connected to the top surface of the base 3, the bottom ends of the left wing panel 6 and the right wing panel 7 are obliquely connected to the top surface of the base 3, and a seat cavity 30 is provided inside the base 3.

[0033] A mold bottom angle 61 is formed between the bottom ends of the left wing plate 6 and the right wing plate 7 and the top surface of the base 3, and the mold bottom angle 61 is an acute angle.

[0034] The front wing panel 4 and the demolding direction 10 form an acute front pin-direction angle 41 , and the rear wing panel 5 and the demolding direction 10 form an acute rear pin-direction angle 51 .

[0035] The front wing plate 4 includes a front upper inclined plate 42 and a front lower straight plate 43. The top end of the front upper inclined plate 42 is connected to the top end of the pin inner column 1. The bottom end of the front upper inclined plate 42 is vertically connected to the top surface of the base 3 after passing through the front lower straight plate 43. A front pin-direction angle 41 is formed between the front upper inclined plate 42 and the demolding direction 10. The angle between the front upper inclined plate 42 and the front lower straight plate 43 is an obtuse angle.

[0036] The rear wing plate 5 includes a rear outer straight plate 52, a rear bottom straight plate 53 and a rear inner inclined plate 54 which are connected in sequence. The rear outer straight plate 52 and the rear bottom straight plate 53 are perpendicular to each other. The rear inner inclined plate 54 is connected to the side of the pin inner column 1. The rear bottom straight plate 53 is fitted and connected to the top surface of the base 3. A rear pin-direction angle 51 is formed between the rear outer straight plate 52 and the demolding direction 10, and the rear outer straight plate 52 and the front lower straight plate 43 are parallel to each other.

[0037] The structures of the left wing plate 6 and the right wing plate 7 are consistent, and both include an upper side inclined plate 71 and a lower side straight plate 72 located on the same plane. The top end of the upper side inclined plate 71 is connected to the top end of the pin inner column 1, the bottom end of the upper side inclined plate 71 is connected to the top end of the lower side straight plate 72, and the bottom end of the lower side straight plate 72 is obliquely connected to the top surface of the base 3.

[0038] The base 3 includes a seat side enclosure 32 and a seat top plate 31 and a seat bottom plate 33 connected to both ends thereof. The top surface of the seat top plate 31 is connected to the bottom ends of the front wing plate 4, the rear wing plate 5, the left wing plate 6, and the right wing plate 7. The seat top plate 31, the seat side enclosure 32, and the seat bottom plate 33 together form a concave seat inner cavity 30, and the seat inner cavity 30 is a one-way opening structure.

[0039] The seat top plate 31 is an inverted L-shaped structure, including a seat top transverse plate 311 and a seat top vertical plate 312 which are vertically connected to each other. The top surface of the seat top transverse plate 311 is connected to the bottom ends of the front wing plate 4, the rear wing plate 5, the left wing plate 6, and the right wing plate 7. A top notch 313 is formed between the seat top transverse plate 311 and the seat top vertical plate 312, and the top notch 313 is communicated with the seat inner cavity 30.

[0040] The seat side surround 32 includes a seat rear side surround 321, a seat middle side surround 322 and a seat front side surround 323 which are connected in sequence. The bottoms of the seat rear side surround 321, the seat middle side surround 322 and the seat front side surround 323 are all connected to the seat bottom plate 33. The seat rear side surround 321 and the seat front side surround 323 are arranged opposite to each other, and the seat rear side surround 321 is wider than the seat front side surround 323.

[0041] The portion of the seat rear side surround 321 close to the seat bottom plate 33 is the base root 34 , and the thickness of the base root 34 is narrower than the thickness of other portions of the base 3 .

[0042] The thickness of the base root 34 is one third of the thickness of the portion of the seat rear side surround 321 close to the seat top plate 31 .

[0043] The principle of the present invention is described as follows:

[0044] See also Figure 1 , Figure 4 and Figure 5 In the prior art, a slider is provided on the locating pin 2 near the front wing plate 4 and the rear wing plate 5, and a slider is also provided on the base 3 near the seat bottom plate 33, which is a total of three sliders. In the present design, through the design of the top notch 313, the front lower part on the locating pin 2 is connected with the seat inner cavity 30 to form a special-shaped structure, so that the slider near the front wing plate 4 and the slider near the seat bottom plate 33 are designed as one, so that only two sliders are needed in total (slider one 8, slider two 9), reducing the number of sliders and reducing costs.

[0045] Embodiment 1:

[0046] See also Figure 1 — Figure 5 , a special-shaped cross locating pin, comprising a locating pin column 2 and a base 3, the bottom end of the locating pin column 2 is connected to the top of the base 3; the locating pin column 2 comprises a front wing plate 4 and a rear wing plate 5 arranged relatively, and a left wing plate 6 and a right wing plate 7 arranged relatively, the inner sides of the front wing plate 4, the rear wing plate 5, the left wing plate 6, and the right wing plate 7 are connected to each other to form a pin inner column 1, the plane in which the left wing plate 6 and the right wing plate 7 are co-existing is consistent with the demolding direction 10, and the planes in which the front wing plate 4 and the rear wing plate 5 are respectively located are different from the demolding direction 10; the bottom ends of the front wing plate 4, the rear wing plate 5, the left wing plate 6, and the right wing plate 7 are all connected to the top surface of the base 3, the rear wing plate 5 is vertically connected to the top surface of the base 3, the bottom ends of the left wing plate 6 and the right wing plate 7 are obliquely connected to the top surface of the base 3, and a seat inner cavity 30 is arranged inside the base 3. Preferably, a mold bottom angle 61 is formed between the bottom ends of the left wing plate 6 and the right wing plate 7 and the top surface of the base 3, and the mold bottom angle 61 is an acute angle.

[0047] Embodiment 2:

[0048] The basic content is the same as that of Example 1, except that:

[0049] The front wing panel 4 and the demolding direction 10 form an acute front pin-direction angle 41 , and the rear wing panel 5 and the demolding direction 10 form an acute rear pin-direction angle 51 . The front wing plate 4 includes a front upper inclined plate 42 and a front lower straight plate 43, the top end of the front upper inclined plate 42 is connected to the top end of the pin inner column 1, and the bottom end of the front upper inclined plate 42 is vertically connected to the top surface of the base 3 after passing through the front lower straight plate 43, and a front pin-direction angle 41 is formed between the front upper inclined plate 42 and the demolding direction 10, and the angle between the front upper inclined plate 42 and the front lower straight plate 43 is an obtuse angle; the rear wing plate 5 includes a rear outer straight plate 52, a rear bottom straight plate 53 and a rear inner inclined plate 54 connected in sequence, the rear outer straight plate 52 and the rear bottom straight plate 53 are perpendicular to each other, the rear inner inclined plate 54 is connected to the side of the pin inner column 1, the rear bottom straight plate 53 is fitted and connected to the top surface of the base 3, the rear outer straight plate 52 and the demolding direction 10 are clamped to form a rear pin-direction angle 51, and the rear outer straight plate 52 and the front lower straight plate 43 are parallel to each other. The structures of the left wing plate 6 and the right wing plate 7 are consistent, and both include an upper side inclined plate 71 and a lower side straight plate 72 located on the same plane. The top end of the upper side inclined plate 71 is connected to the top end of the pin inner column 1, the bottom end of the upper side inclined plate 71 is connected to the top end of the lower side straight plate 72, and the bottom end of the lower side straight plate 72 is obliquely connected to the top surface of the base 3.

[0050] Embodiment 3:

[0051] The basic content is the same as that of Example 2, except that:

[0052] The base 3 includes a seat side enclosure 32 and a seat top plate 31 and a seat bottom plate 33 connected to both ends thereof. The top surface of the seat top plate 31 is connected to the bottom ends of the front wing plate 4, the rear wing plate 5, the left wing plate 6, and the right wing plate 7. The seat top plate 31, the seat side enclosure 32, and the seat bottom plate 33 together form a concave seat inner cavity 30, and the seat inner cavity 30 is a one-way opening structure. The seat top plate 31 is an inverted L-shaped structure, including a seat top horizontal plate 311 and a seat top vertical plate 312 connected to each other vertically. The top surface of the seat top horizontal plate 311 is connected to the bottom ends of the front wing plate 4, the rear wing plate 5, the left wing plate 6, and the right wing plate 7. A top notch 313 is formed between the seat top horizontal plate 311 and the seat top vertical plate 312, and the top notch 313 is communicated with the seat inner cavity 30.

[0053] The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiment. Any equivalent modifications or changes made by ordinary technicians in this field based on the contents disclosed by the present invention should be included in the protection scope recorded in the claims.

Claims

1. A special-shaped cross positioning pin, comprising a positioning pin column (2) and a base (3), wherein the bottom end of the positioning pin column (2) is connected to the top of the base (3), characterized in that: The positioning pin column (2) comprises a front wing plate (4), a rear wing plate (5) arranged oppositely, and a left wing plate (6), a right wing plate (7) arranged oppositely, the inner sides of the front wing plate (4), the rear wing plate (5), the left wing plate (6), and the right wing plate (7) are connected to each other to form a pin inner column (1), the plane on which the left wing plate (6) and the right wing plate (7) are located is consistent with the demoulding direction (10), and the planes on which the front wing plate (4) and the rear wing plate (5) are located are different from the demoulding direction (10); The bottom ends of the front wing plate (4), the rear wing plate (5), the left wing plate (6), and the right wing plate (7) are all connected to the top surface of the base (3); the rear wing plate (5) is vertically connected to the top surface of the base (3); the bottom ends of the left wing plate (6) and the right wing plate (7) are obliquely connected to the top surface of the base (3); and a seat inner cavity (30) is provided inside the base (3); The front wing plate (4) and the demoulding direction (10) form an acute front pin-direction angle (41), and the rear wing plate (5) and the demoulding direction (10) form an acute rear pin-direction angle (51); The base (3) comprises a seat side surround (32) and a seat top plate (31) and a seat bottom plate (33) connected at both ends thereof; the top surface of the seat top plate (31) is connected to the bottom ends of the front wing plate (4), the rear wing plate (5), the left wing plate (6), and the right wing plate (7); the seat top plate (31), the seat side surround (32), and the seat bottom plate (33) together form a concave seat inner cavity (30); and the seat inner cavity (30) is a one-way opening structure.

2. The special-shaped cross positioning pin according to claim 1, characterized in that: A mold-to-bottom angle (61) is formed between the bottom ends of the left wing plate (6) and the right wing plate (7) and the top surface of the base (3), and the mold-to-bottom angle (61) is an acute angle.

3. The special-shaped cross positioning pin according to claim 1, characterized in that: The front wing plate (4) comprises a front upper inclined plate (42) and a front lower straight plate (43), the top end of the front upper inclined plate (42) is connected to the top end of the pin inner column (1), the bottom end of the front upper inclined plate (42) is vertically connected to the top surface of the base (3) via the front lower straight plate (43), a front pin direction angle (41) is formed between the front upper inclined plate (42) and the demoulding direction (10), and the angle between the front upper inclined plate (42) and the front lower straight plate (43) is an obtuse angle; The rear wing plate (5) comprises a rear outer straight plate (52), a rear bottom straight plate (53) and a rear inner inclined plate (54) which are connected in sequence. The rear outer straight plate (52) and the rear bottom straight plate (53) are perpendicular to each other. The rear inner inclined plate (54) is connected to the side of the pin inner column (1). The rear bottom straight plate (53) is fitted and connected to the top surface of the base (3). A rear pin direction angle (51) is formed between the rear outer straight plate (52) and the demoulding direction (10). The rear outer straight plate (52) and the front lower straight plate (43) are parallel to each other.

4. The special-shaped cross positioning pin according to claim 3, characterized in that: The left wing plate (6) and the right wing plate (7) have the same structure, and both include an upper side inclined plate (71) and a lower side straight plate (72) located on the same plane, the top end of the upper side inclined plate (71) is connected to the top end of the pin inner column (1), the bottom end of the upper side inclined plate (71) is connected to the top end of the lower side straight plate (72), and the bottom end of the lower side straight plate (72) is connected to the top surface of the base (3) at an angle.

5. The special-shaped cross positioning pin according to claim 1, characterized in that: The seat top plate (31) is an inverted L-shaped structure, comprising a seat top transverse plate (311) and a seat top vertical plate (312) vertically connected to each other, the top surface of the seat top transverse plate (311) being connected to the bottom ends of the front wing plate (4), the rear wing plate (5), the left wing plate (6), and the right wing plate (7), a top notch (313) is formed between the seat top transverse plate (311) and the seat top vertical plate (312), and the top notch (313) is in communication with the seat inner cavity (30).

6. The special-shaped cross positioning pin according to claim 5, characterized in that: The seat side surround (32) comprises a seat rear side surround (321), a seat middle side surround (322) and a seat front side surround (323) which are connected in sequence; the bottoms of the seat rear side surround (321), the seat middle side surround (322) and the seat front side surround (323) are all connected to the seat bottom plate (33); the seat rear side surround (321) and the seat front side surround (323) are arranged opposite each other, and the seat rear side surround (321) is wider than the seat front side surround (323).

7. The special-shaped cross positioning pin according to claim 6, characterized in that: The portion of the seat rear side surround (321) close to the seat bottom plate (33) is the base root (34), and the thickness of the base root (34) is narrower than the thickness of other portions of the base (3).

8. The special-shaped cross positioning pin according to claim 7, characterized in that: The thickness of the base root (34) is one third of the thickness of a portion of the seat rear side surround (321) close to the seat top plate (31).

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