Cold pressing spring pin, cold pressing die and pressing machine

Abstract

The utility model belongs to the technical field of pin manufacturing, and particularly relates to a cold pressing spring pin, a cold pressing die and a press machine, the cold pressing spring pin comprises a shell used for protecting internal elements, the shell is internally provided with a through containing cavity and a fixing pin, the fixing pin is arranged in the containing cavity, and the fixing pin is arranged in the containing cavity. The fixing pin comprises a first part, a second part and a third part, the first part, the second part and the third part are integrally formed, the fixing pin is sleeved with the compression part, the compression part abuts against the shell and the fixing pin, the first part and the third part are used for limiting the fixing pin, and the compression part is used for compressing the fixing pin. And the first part, the second part and the third part are integrally arranged, so that the reliability of the spring pin can be greatly improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of column pin manufacturing, in particular to a cold-pressed spring pin, a cold-pressing die and a press. Background Art

[0002] A spring pin, also known as a spring cylindrical pin, is a headless, hollow cylinder with an axial slot and chamfered ends. It is primarily used for positioning, connecting, and securing parts. To ensure good elasticity and shear resistance, its outer diameter is typically slightly larger than the mounting hole diameter.

[0003] A spring pin typically consists of a pin, a rivet sleeve, a spring, and a pin head. The rivet sleeve has a groove. When the pin is pressed into a pre-set hole in the sheet metal, the pressure causes plastic deformation around the hole. The deformed material is then drawn into the groove, locking the spring pin firmly in place. This design allows the spring pin to expand and contract by stretching, retracting when pulled and extending when released.

[0004] The existing spring pin structure usually opens a cavity inside the shell to accommodate the pin, and then places one end of the pin in the cavity, and the other end of the pin extends out of the cavity. Then, a retaining spring is set on the part of the pin extending out of the cavity. The retaining spring restricts the pin in the cavity to prevent it from falling off. However, when the pin is restricted in this way, there is still a risk that the retaining spring and the pin will fall off when the spring pin moves, resulting in failure of the pin limit. Utility Model Content

[0005] The purpose of this utility model is: based on the inventor's own practice and combined with actual usage, in response to the defects of the existing technology, he designed a cold-pressed spring pin to solve the technical problem that when the pin is restricted by the retaining spring, the retaining ring still has the risk of falling off.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A cold pressed spring pin, comprising:

[0008] A housing for protecting internal components, wherein the housing has a through accommodating cavity therein, the accommodating cavity including a first blind hole and a second blind hole, the first blind hole and the second blind hole being connected via a through hole, and a snap-fit ​​groove is further provided on the outer side of the housing, the snap-fit ​​groove being arranged along the circumference of the housing;

[0009] A fixing pin, the fixing pin being placed in the accommodating cavity, the fixing pin comprising a first portion, a second portion, and a third portion, wherein the first portion, the second portion, and the third portion are integrally formed;

[0010] A compression piece is sleeved on the fixing pin, and the compression piece abuts against the housing and the fixing pin respectively.

[0011] Furthermore, the first portion corresponds to the first blind hole, and a diameter of the first portion is greater than a diameter of the through hole.

[0012] Furthermore, the second portion is arranged corresponding to the through hole, and the diameter of the second portion is smaller than or equal to the diameter of the through hole, while the length of the second portion is greater than the length of the through hole.

[0013] Furthermore, the third portion is opposite to the first portion and is arranged corresponding to the second blind hole, and the cross-sectional length of the third portion is greater than the diameter of the through hole.

[0014] Furthermore, the first part also includes a first step portion and a second step portion, the second step portion is directly connected to the second part, the first step portion is arranged on the side of the second step portion away from the second part, the compression member is sleeved on the second step portion, and the upper end of the compression member abuts against the first step portion.

[0015] Furthermore, the diameter of the first stepped portion is the same as the inner diameter of the first blind hole.

[0016] The beneficial effects of the present invention are: the shell is used to protect the fixing pin and the compression member inside the shell, and prevent the fixing pin and the compression member from being damaged and causing the spring pin to lose its corresponding function. When the fixing pin is installed in the accommodating cavity, it is positioned by the first part to prevent the fixing pin from being too inserted into the accommodating cavity, and the function of the second part is to facilitate the sliding of the fixing pin so that the fixing pin can move within a limited range. After the fixing pin is installed in the accommodating cavity, the fixing pin is limited as a whole by the third part to prevent the fixing pin from leaving the accommodating cavity. Since the first part, the second part and the third part are arranged as one body, the spring pin will not fall off during long-term use, preventing limit failure and improving the reliability of the spring pin. When the fixing pin moves in the accommodating cavity, the position of the fixing pin is returned to the initial position by the compression member.

[0017] The second purpose of the present utility model is to provide a cold pressing mold, including an upper mold, a lower mold and a positioning plate slidably connected to the upper mold and the lower mold, the upper mold and the lower mold are provided with cold pressing openings arranged opposite to each other, the cold pressing openings are used to cold press the spring pin mentioned above, and the positioning plate is provided with a positioning hole, and the positioning hole is arranged opposite to the cold pressing opening.

[0018] Furthermore, it also includes a clamping block, which cooperates with the above-mentioned shell, and two oppositely arranged clamping protrusions are provided on the clamping block along the length direction of the clamping block, and the two clamping protrusions are clamped with the clamping groove.

[0019] Furthermore, a sliding protrusion is provided on the positioning plate along the length direction of the positioning plate, and a sliding groove is provided on the upper mold and the lower mold. The upper mold and the lower mold are slidingly connected to the positioning plate through the sliding protrusion and the sliding groove.

[0020] The third purpose of the present utility model is to provide a cold pressing machine, including a machine platform and an extrusion part, the machine platform and the extrusion part are arranged relative to each other, the lower mold mentioned above is fixedly connected to the machine platform, the upper mold is fixedly connected to the extrusion part, and the upper mold is moved toward the lower mold by the extrusion part. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The following will refer to the attached Figures 1 to 6 To describe the features, advantages and technical effects of exemplary embodiments of the present invention.

[0022] Figure 1 This is a view of the overall structure of the spring pin in the utility model;

[0023] Figure 2 This is a cross-sectional exploded structural view of the spring pin in the present utility model;

[0024] Figure 3 This is an exploded view of the cooperation between the spring pin and the clamping block in the utility model;

[0025] Figure 4 This is an exploded view of the spring pin, the clamping block and the positioning plate in the present invention;

[0026] Figure 5 This is an exploded view of the overall structure of the cold pressing die in the present invention;

[0027] Figure 6 This is a view of the cooperation between the press machine, cold pressing die and spring pin in the utility model.

[0028] In the figure: 1. Housing; 2. Fixing pin; 3. Compression member; 4. Upper mold; 5. Lower mold; 6. Positioning plate; 7. Clamping block; 8. Machine platform; 9. Extrusion unit;

[0029] 11. Accommodating cavity; 12. Snap-fitting groove;

[0030] 111, first blind hole; 112, through hole; 113, second blind hole;

[0031] 21. Part 1; 22. Part 2; 23. Part 3;

[0032] 211, first step; 212, second step;

[0033] 41. Cold press opening; 42. Sliding groove;

[0034] 61. Positioning hole; 62. Sliding protrusion;

[0035] 71. Convex. DETAILED DESCRIPTION

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0037] In the description of the embodiments of this application, the technical terms "first" and "second" are used only to distinguish different objects and should not be understood to indicate or imply relative importance or implicitly specify the quantity, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, the meaning of "plurality" is more than two, unless otherwise clearly and specifically defined.

[0038] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; internal connections between two components or interactions between two components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present application based on specific circumstances.

[0039] The following is combined with Figures 1 to 6 The present invention is further described in detail, but is not intended to limit the present invention.

[0040] Example 1

[0041] like Figure 1 and Figure 2 As shown, this embodiment discloses a cold-pressed spring pin, comprising:

[0042] A housing 1 for protecting internal components has a through-hole 11 formed therein. The through-hole 111 includes a first blind hole 111 and a second blind hole 113. The first blind hole 111 and the second blind hole 113 are connected by a through hole 112. A snap-fit ​​groove 12 is further provided on the outside of the housing 1 and is arranged along the circumference of the housing 1.

[0043] like Figure 2As shown, the fixing pin 2 is placed in the accommodating cavity 11. The fixing pin 2 includes a first portion 21, a second portion 22 and a third portion 23. The first portion 21, the second portion 22 and the third portion 23 are integrally formed.

[0044] like Figure 2 As shown, the compression member 3 is sleeved on the fixing pin 2, and the compression member 3 abuts against the housing 1 and the fixing pin 2 respectively.

[0045] like Figure 2 As shown, specifically, in this embodiment, the shell 1 is used to protect the fixing pin 2 and the compression member 3 in the shell 1 to prevent the fixing pin 2 and the compression member 3 from being damaged and causing the spring pin to lose its corresponding function. When the fixing pin 2 is installed in the accommodating cavity 11, it is positioned by the first part 21 to prevent the fixing pin 2 from being too inserted into the accommodating cavity 11, and the function of the second part 22 is to facilitate the sliding of the fixing pin 2 so that the fixing pin 2 can move within a limited range. After the fixing pin 2 is installed in the accommodating cavity 11, the fixing pin 2 is limited as a whole by the third part 23 to prevent the fixing pin 2 from being separated from the accommodating cavity 11. Since the first part 21, the second part 22 and the third part 23 are arranged as an integral whole, the spring pin will not fall off during long-term use, preventing the limit failure and improving the reliability of the spring pin. When the fixing pin 2 moves in the accommodating cavity 11, the position of the fixing pin 2 is returned to the initial position by the compression member 3.

[0046] like Figure 2 As shown, in this embodiment, the first portion 21 corresponds to the first blind hole 111 , and the diameter of the first portion 21 is greater than the diameter of the through hole 112 .

[0047] like Figure 2 As shown, specifically, when assembling the spring pin, first, one end of the third part 23 on the fixing pin 2 is inserted into the accommodating cavity 11 through the first blind hole 111. At this time, since the third part 23 has not been cold-pressed, the shape and diameter of the third part 23 and the second part 22 are the same, and the third part 23 and the second part 22 can easily pass through the first blind hole 111 and the through hole 112. Then, since the diameter of the first part 21 is larger than the diameter of the through hole 112, the first part 21 cannot pass through the through hole 112, and is limited by the first part 21. Finally, the third part 23 is cold-pressed to deform the third part 23, and the axial direction of the fixing pin 2 is limited by the first part 21 and the second part 22 to prevent the fixing pin 2 from leaving the accommodating cavity 11.

[0048] like Figure 2 As shown, in this embodiment, the second portion 22 is arranged corresponding to the through hole 112, and the diameter of the second portion 22 is less than or equal to the diameter of the through hole 112, while the length of the second portion 22 is greater than the length of the through hole 112.

[0049] like Figure 2 As shown, specifically, the second part 22 is an indispensable part, and the fixing pin 2 can be stably placed in the accommodating cavity 11 only through the second part 22. The first part 21 and the third part 23 at both ends of the second part 22 together constitute the fixing pin 2. The function of the first part 21 and the third part 23 is to limit the entire fixing pin 2 to prevent the fixing pin 2 from falling into the accommodating cavity 11. After the fixing pin 2 is installed with the shell 1, since the diameter of the second part 22 is smaller than the diameter of the through hole 112 (in this embodiment, the diameter of the second part 22 is smaller than the diameter of the through hole 112, in other embodiments, the diameter of the second part 22 can also be the same as the diameter of the through hole 112, which is set according to specific needs), and the length of the second part 22 is longer than the length of the through hole 112, the second part 22 can move along the extension direction of the through hole 112.

[0050] like Figure 2 As shown, in this embodiment, the third portion 23 is opposite to the first portion 21 and is arranged corresponding to the second blind hole 113 , and the cross-sectional length of the third portion 23 is greater than the diameter of the through hole 112 .

[0051] Specifically, the third part 23 is arranged at the other end of the second part 22 relative to the first part 21. Arranging the first part 21 and the third part 23 at both ends of the second part 22 can maximize the movement range of the fixing pin 2. The third part 23 before cold pressing is the same as the second part 22, so the third part 23 can easily pass through the first blind hole 111 and the through hole 112 and be placed in the second blind hole 113. The third part 23 after cold pressing is flat, and its cross-sectional length is greater than the diameter of the through hole 112, so it can prevent the third part 23 from being placed in the through hole 112, thereby causing the fixing pin 2 to detach from the accommodating cavity 11.

[0052] like Figure 2 As shown, in this embodiment, the first part 21 also includes a first step portion 211 and a second step portion 212, the second step portion 212 is directly connected to the second part 22, the first step portion 211 is arranged on the side of the second step portion 212 away from the second part 22, the compression member is sleeved on the second step portion 212, and the upper end of the compression member 3 is in contact with the first step portion 211.

[0053] Specifically, the diameter of the first step portion 211 is the same as the inner diameter of the compression member 3, and the compression sleeve is arranged on the second step portion 212, so that the compression member 3 is limited by the second step portion 212 to prevent the compression member 3 from shaking and causing inconsistent elasticity. The setting of the first step portion 211 can press the compression member 3 to prevent the compression member 3 from separating from the second step portion 212.

[0054] like Figure 2As shown, in this embodiment, the diameter of the first stepped portion 211 is the same as the inner diameter of the first blind hole 111 .

[0055] Specifically, the diameter of the first step portion 211 is the same as the inner diameter of the first blind hole 111. Therefore, after the fixing pin 2 is installed in the accommodating cavity 11, there is no gap between the first step portion 211 and the first blind hole 111, which can prevent external debris from entering the accommodating cavity 11 and causing damage to the compression member 3 or the fixing pin 2, thereby affecting the reliability of the spring pin.

[0056] The installation process of the spring pin in this embodiment is: first, the compression member 3 is placed in the first blind hole 111 tube, and then the third part 23 and the second part 22 of the fixing pin 2 pass through the first blind hole 111, the compression member 3 and pass through, and the compression member 3 is sleeved on the second step portion 212, and the top abuts against the first step portion 211, thereby limiting the compression member 3.

[0057] Example 2

[0058] like Figures 3 to 5 As shown, the second purpose of the present invention is to provide a cold pressing mold, including an upper mold 4, a lower mold 5 and a positioning plate 6 slidingly connected to the upper mold 4 and the lower mold 5, the upper mold 4 and the lower mold 5 have relatively arranged cold pressing openings 41, the cold pressing openings 41 are used to cold press the above-mentioned spring pin, and a positioning hole 61 is provided on the positioning plate 6, and the positioning hole 61 is arranged opposite to the cold pressing opening 41.

[0059] Specifically, the upper mold 4 and the lower mold 5 are used to perform cold pressing operations on the spring pin. The function of the positioning plate 6 is to position the upper mold 4 and the lower mold 5, and at the same time guide the movement of the upper mold 4 to prevent the upper mold 4 and the lower mold 5 from being misaligned. The cold pressing opening 41 is set to facilitate the cold pressing of the third part 23, and the third part 23 is cold pressed into a set shape. The positioning hole 61 is used to position the fixing pin 2. At the same time, the positioning hole 61 is also regarded as a processing station. The third part 23 only needs to be passed through the positioning hole 61 and placed at the cold pressing opening 41, and the upper mold 4 and the lower mold 5 can cold press the third part 23.

[0060] like Figure 3 and Figure 4 As shown, in this embodiment, a clamping block 7 is also included, which cooperates with the shell 1 mentioned above. Two oppositely arranged clamping protrusions 71 are provided on the clamping block 7 along the length direction of the clamping block 7, and the two clamping protrusions 71 are clamped with the clamping groove 12.

[0061] Specifically, after the fixing pin 2 is placed in the accommodating cavity 11, since a compression member 3 is provided in the accommodating cavity 11, the compression member 3 will push the fixing pin 2 outward. In this state, if the first part 21 is manually pressed into the accommodating cavity 11, it is not only laborious, but also difficult to control the manual strength. If the pressure is too large or too small, it will not work, which will cause the deformation area of ​​the third part 23 to be different. Therefore, a clamping block 7 is provided. The clamping block 7 can ensure that the deformation part of the third part 23 is always consistent, and it is also more labor-saving.

[0062] It should be noted that the end of the first portion 21 is circular, which can save effort when the spring pin is pressed by the clamping block 7 .

[0063] like Figure 3 As shown, in this embodiment, a sliding protrusion 62 is provided on the positioning plate 6 along the length direction of the positioning plate 6, and a sliding groove 42 is provided on the upper mold 4 and the lower mold 5. The upper mold 4 and the lower mold 5 are slidingly connected to the positioning plate 6 through the sliding protrusion 62 and the sliding groove 42.

[0064] Specifically, when assembling the cold pressing mold, the lower mold 5 is first fixed, and then the sliding protrusion 62 of the positioning plate 6 is matched with the sliding groove 42 on the lower mold 5. After installation, the sliding groove 42 of the upper mold 4 is matched with the sliding protrusion 62 of the positioning plate 6. Finally, the upper mold 4 is moved up and down toward the lower mold 5 for cold pressing. By setting the sliding protrusion 62 and the sliding groove 42, the movement consistency of the upper mold 4 and the lower mold 5 is ensured, thereby improving the quality of cold pressing.

[0065] Example 3

[0066] like Figure 6 As shown, the third purpose of the present invention is to provide a cold pressing machine, including a machine platform 8 and an extrusion part 9, the machine platform 8 and the extrusion part 9 are arranged relatively to each other, the lower mold 5 mentioned above is fixedly connected to the machine platform 8, the upper mold 4 is fixedly connected to the extrusion part 9, and the upper mold 4 is driven by the extrusion part 9 to move toward the lower mold 5.

[0067] Specifically, it is not realistic to want to deform the metal by cold pressing it by manpower. Therefore, in this embodiment, a press is used to achieve cold pressing and deformation of the metal. The lower mold 5 is horizontally set on the machine table 8. Finally, the positioning plate 6 and the upper mold 4 are set based on the lower mold 5, so that the third part 23 finally cold pressed can meet the quality requirements. The upper mold 4 is connected to the extrusion part 9, and finally the extrusion part 9 drives the upper mold 4 to move to the lower mold 5, thereby cold pressing the third part 23 to deform the third part 23.

[0068] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0069] Based on the disclosure and teachings of the above description, those skilled in the art will be able to make changes and modifications to the above embodiments. Therefore, the present invention is not limited to the specific embodiments described above. Any obvious improvements, substitutions, or modifications made by those skilled in the art based on the present invention fall within the scope of protection of the present invention. In addition, although certain specific terms are used in this description, these terms are for convenience only and do not constitute any limitation on the present invention.

Claims

1. A cold pressed spring pin, characterized in that: include: A housing for protecting internal components, wherein the housing has a through accommodating cavity therein, the accommodating cavity including a first blind hole and a second blind hole, the first blind hole and the second blind hole being connected via a through hole, and a snap-fit ​​groove is further provided on the outer side of the housing, the snap-fit ​​groove being arranged along the circumference of the housing; A fixing pin, the fixing pin being placed in the accommodating cavity, the fixing pin comprising a first portion, a second portion, and a third portion, wherein the first portion, the second portion, and the third portion are integrally formed; A compression piece is sleeved on the fixing pin, and the compression piece abuts against the housing and the fixing pin respectively.

2. The cold-pressed spring pin according to claim 1, characterized in that: The first portion corresponds to the first blind hole, and a diameter of the first portion is greater than a diameter of the through hole.

3. The cold-pressed spring pin according to claim 1, characterized in that: The second portion is arranged corresponding to the through hole, and a diameter of the second portion is smaller than or equal to a diameter of the through hole, while a length of the second portion is greater than a length of the through hole.

4. The cold-pressed spring pin according to claim 1, characterized in that: The third portion is opposite to the first portion and is arranged corresponding to the second blind hole. The cross-sectional length of the third portion is greater than the diameter of the through hole.

5. The cold-pressed spring pin according to claim 1, characterized in that: The first part also includes a first step portion and a second step portion, the second step portion is directly connected to the second part, the first step portion is arranged on a side of the second step portion away from the second part, the compression member is sleeved on the second step portion, and the upper end of the compression member abuts against the first step portion.

6. The cold-pressed spring pin according to claim 5, characterized in that: The diameter of the first step portion is the same as the inner diameter of the first blind hole.

7. A cold pressing die, characterized in that: It includes an upper mold, a lower mold and a positioning plate slidably connected to the upper mold and the lower mold, the upper mold and the lower mold are provided with cold pressing openings arranged opposite to each other, the cold pressing openings are used to cold press the cold pressed spring pin according to any one of claims 1 to 6, and the positioning plate is provided with a positioning hole, which is arranged opposite to the cold pressing opening.

8. The cold pressing mold according to claim 7, characterized in that: It also includes a clamping block, which cooperates with the shell in claim 1. Two oppositely arranged clamping protrusions are provided on the clamping block along the length direction of the clamping block, and the two clamping protrusions are clamped with the clamping groove.

9. The cold pressing mold according to claim 7, characterized in that: A sliding protrusion is provided on the positioning plate along the length direction of the positioning plate, and a sliding groove is provided on the upper mold and the lower mold. The upper mold, the lower mold and the positioning plate are slidably connected through the sliding protrusion and the sliding groove.

10. A press machine, characterized in that: It includes a machine platform and an extrusion part, which are arranged relative to each other. In the cold pressing mold described in any one of claims 7 to 9, the lower mold is fixedly connected to the machine platform, and the upper mold is fixedly connected to the extrusion part. The upper mold moves toward the lower mold through the drive of the extrusion part.

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