Screw riveting positioning device and screw machined by same

Abstract

The utility model relates to the field of screw production. The utility model discloses a screw riveting positioning device and a screw processed by the screw riveting positioning device, the screw riveting positioning device comprises a positioning jig, a cantilever, a lifting device, an ejector rod, an elastic element and a lifting assembly, the ejector rod is arranged on the cantilever, the lifting assembly comprises a lower lifting platform, a guide column and a positioning block, and the cantilever, the ejector rod, the lower lifting platform and the positioning jig are sequentially arranged from top to bottom. The guide columns are arranged around the ejector rod at intervals and slidably arranged on the cantilever, the lower ends of the guide columns are arranged on the lower lifting table, the positioning blocks are evenly arranged around the center line of the ejector rod at intervals and slidably arranged on the lower lifting table in the radial direction of the ejector rod, and the ends, close to the center line of the ejector rod, of the positioning blocks are each provided with a first guide face. A cone is convexly arranged on the lower surface of the ejector rod; and the first guide surface is coplanar with the conical surface of the cone. The boat-shaped sheet metal part and the screw body can be positioned, boat-shaped sheet metal parts of various specifications can be positioned, the universality is high, and the requirement for automatic production is met.

Description

Technical Field

[0001] This utility model relates to the field of screw manufacturing, and in particular to a screw riveting and positioning device and the screws processed therefrom. Background Technology

[0002] like Figure 4 As shown, there is currently a type of screw that includes a screw body and a boat-shaped sheet metal part riveted to the upper end of the screw body. The boat-shaped sheet metal part is boat-shaped, and the axial cross section of the screw body is cross-shaped.

[0003] After cold heading, the upper end of the screw body and the sheet metal fitting need to be riveted together using riveting equipment. Before riveting, the screw body and sheet metal fitting need to be loaded onto a positioning fixture. Because the diameter of the riveting hole on the sheet metal mating part is larger than the diameter of the upper end of the screw body, a positioning operation is required to ensure the riveting quality. Due to the varied sizes and shapes of boat-shaped sheet metal parts, multiple positioning fixtures need to be fabricated to position boat-shaped sheet metal parts of different shapes and sizes, resulting in high costs. Utility Model Content

[0004] Therefore, the purpose of this utility model is to provide a screw riveting and positioning device and the screw processed therefrom, which positions the screw body by a positioning fixture and positions the boat-shaped sheet metal part on the positioning fixture by a positioning block, thereby solving the positioning problem of various boat-shaped sheet metal parts.

[0005] The purpose of this utility model is to provide a screw riveting and positioning device and the screw processed therefrom, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a screw riveting and positioning device, comprising:

[0007] A positioning fixture, wherein a rectangular groove for positioning a workpiece is provided at the center of the positioning fixture, and a circular insertion hole for positioning the lower end of the workpiece is provided at the center of the bottom of the rectangular groove.

[0008] A cantilever, wherein the cantilever is disposed above the positioning fixture;

[0009] A lifting device is provided on one side of the positioning fixture. The cantilever and the lifting device are connected sequentially from top to bottom. The lifting device drives the cantilever to move in the vertical direction.

[0010] A push rod is disposed at one end of the lower surface of the cantilever;

[0011] A lifting assembly includes a lower lifting platform, several guide columns, and several positioning blocks. The cantilever, top rod, lower lifting platform, and positioning fixture are arranged sequentially from top to bottom. The guide columns are spaced around the top rod, and each guide column is slidably mounted on the cantilever in a vertical direction. The lower end of each guide column is located at the edge of the upper surface of the lower lifting platform. The positioning blocks are evenly spaced around the center line of the top rod at the center position of the lower lifting platform. Each positioning block is slidably mounted on the lower lifting platform in a radial direction along the top rod. Each positioning block has a first guide surface at one end near the center line of the top rod. A cone protrudes from the lower surface of the top rod, and the first guide surface and the conical surface of the cone are coplanar.

[0012] The elastic element, and the upper end of each positioning block is sleeved inside the elastic element.

[0013] Preferably, the positioning block is projected vertically downwards into the interior of the rectangular groove, and the sliding direction of the positioning block is set along the diagonal of the rectangular groove.

[0014] Preferably, the positioning block includes a T-shaped block and a fixing block, which are detachably connected from top to bottom. A cross-shaped sliding groove is provided at the center of the lower lifting platform. The lower end of the T-shaped block is slidably disposed inside the sliding groove. The fixing block is disposed below the lower lifting platform and is interference-fitted with the sliding groove. A stepped groove is provided at one end of the fixing block near the center line of the top rod. The stepped grooves are connected end to end to form a circular groove.

[0015] Preferably, the lifting assembly further includes several limiting plates, which are respectively disposed on the upper end of the positioning block, and the elastic element is sandwiched between the end of the limiting plate away from the center line of the top rod and the upper surface of the lower lifting platform.

[0016] Preferably, each of the limiting plates has a second guide surface at one end near the center line of the top rod, and the second guide surface is coplanar with the cone surface of the cone.

[0017] Preferably, the lifting assembly further includes a return spring, which is sleeved with the guide post in a one-to-one correspondence, and the two ends of the return spring are respectively disposed on the lower surface of the cantilever and the upper surface of the lower lifting platform.

[0018] Preferably, the lifting assembly further includes an upper lifting platform, which is disposed above the cantilever, and the upper end of each guide column is disposed at the edge of the lower surface of the upper lifting platform.

[0019] Preferably, a through groove is formed in the middle of the upper surface of the positioning fixture, and the rectangular groove is located at the center of the bottom of the through groove. The width of the through groove is smaller than the width of the lower lifting platform.

[0020] Preferably, the elastic element is a rectangular rubber ring. Multiple positioning blocks are driven to move closer together by the elastic element.

[0021] This utility model also provides a screw, manufactured using the screw riveting and positioning device described above. Specifically, it includes a screw body and a boat-shaped sheet metal part. The upper surface of the boat-shaped sheet metal part has a boat-shaped groove, with mounting holes at both ends. A riveting hole is located at the center of the boat-shaped groove. The upper end of the screw body is riveted into the riveting hole, and the lower end of the screw body has external threads. A rectangular plane is located at the center of both the lower end of the boat-shaped sheet metal part and the bottom of the boat-shaped groove. The lower end of the screw body is inserted into a circular insertion hole. The lower end of the positioning block is positioned on the rectangular plane at the center of the bottom of the boat-shaped groove. Utilizing the rectangular planes at the bottom of both the boat-shaped groove and the lower end of the boat-shaped sheet metal part, the positioning block positions the boat-shaped sheet metal part and the screw body.

[0022] The beneficial effects of this utility model are as follows: the positioning fixture can quickly locate the position of the positioning screw, the through groove can initially locate the boat-shaped sheet metal part, and the positioning blocks that are far apart from each other can accurately locate the end corner position of the rectangular plane inside the boat-shaped groove. This can realize the positioning of the boat-shaped sheet metal part and the screw body, and can locate boat-shaped sheet metal parts of various specifications. It has high versatility and meets the requirements of automated production. Attached Figure Description

[0023] The accompanying drawings further illustrate the present invention, but the embodiments in the drawings do not constitute any limitation on the present invention.

[0024] Figure 1 This is a schematic diagram of the screw riveting and positioning device provided in an embodiment of the present invention;

[0025] Figure 2 for Figure 1 A magnified view of a portion of region A in the middle;

[0026] Figure 3 This is a schematic diagram of the structure of a positioning block provided in an embodiment of the present invention;

[0027] Figure 4 This is a schematic diagram of the screw provided in one embodiment of the present invention.

[0028] Reference numerals: 1: Positioning fixture; 2: Cantilever; 3: Lifting device; 4: Top rod; 5: Lower lifting platform; 6: Guide column; 7: Upper lifting platform; 8: Positioning block; 9: Limiting plate; 10: First guide surface; 11: Through groove; 12: Rectangular groove; 13: Circular insertion hole; 14: Step groove; 15: Screw body; 16: Boat-shaped sheet metal part. Detailed Implementation

[0029] The specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of this utility model.

[0030] It should be noted that, in this utility model, unless otherwise stated, when an element is referred to as "fixed to" or "set on" another element, it can be directly on the other element or an intervening element may be present simultaneously. When an element is referred to as "connected to" another element, it can be directly connected to the other element or an intervening element may be present simultaneously. The directional terms used, such as "up," "down," "left," and "right," generally refer to... Figure 1 The directions shown are up, down, left, and right. "Inner" and "outer" refer to the inner and outer parts of a specific outline. "Far" and "near" refer to the distance or proximity relative to a particular component.

[0031] like Figures 1-4 As shown in the figure, an embodiment of the present invention provides a screw riveting and positioning device, comprising:

[0032] A positioning fixture, wherein a rectangular groove for positioning a workpiece is provided at the center of the positioning fixture, and a circular insertion hole for positioning the lower end of the workpiece is provided at the center of the bottom of the rectangular groove.

[0033] A cantilever, wherein the cantilever is disposed above the positioning fixture;

[0034] A lifting device is provided on one side of a positioning fixture. The cantilever and the lifting device are connected sequentially from top to bottom. The lifting device drives the cantilever to move in the vertical direction. The lifting device is an electric cylinder or a pneumatic cylinder.

[0035] A push rod is disposed at one end of the lower surface of the cantilever;

[0036] A lifting assembly includes a lower lifting platform, several guide columns, and several positioning blocks. The cantilever, top rod, lower lifting platform, and positioning fixture are arranged sequentially from top to bottom. The guide columns are spaced around the top rod, and each guide column is slidably mounted on the cantilever in a vertical direction. The lower end of each guide column is located at the edge of the upper surface of the lower lifting platform. The positioning blocks are evenly spaced around the center line of the top rod at the center position of the lower lifting platform. Each positioning block is slidably mounted on the lower lifting platform in a radial direction along the top rod. Each positioning block has a first guide surface at one end near the center line of the top rod. A cone protrudes from the lower surface of the top rod, and the first guide surface and the conical surface of the cone are coplanar.

[0037] The elastic element, and the upper end of each positioning block is sleeved inside the elastic element.

[0038] The positioning block is projected vertically downwards into the interior of the rectangular groove, and the sliding direction of the positioning block is set along the diagonal of the rectangular groove.

[0039] The positioning block includes a T-shaped block and a fixing block, which are detachably connected from top to bottom. A cross-shaped groove is formed at the center of the lower lifting platform. The lower end of the T-shaped block is slidably disposed within the groove. The fixing block is positioned below the lower lifting platform and is interference-fitted with the groove. A stepped groove is formed at the end of the fixing block near the center line of the top rod. These stepped grooves are connected end-to-end to form a circular groove. The circular groove is used to accommodate the upper end of the screw body.

[0040] The lifting assembly also includes several limiting plates, which are respectively arranged on the upper end of the positioning block. The elastic element is sandwiched between the end of the limiting plate away from the center line of the top rod and the upper surface of the lower lifting platform.

[0041] Each of the limiting plates has a second guide surface at one end near the center line of the top rod, and the second guide surface is coplanar with the cone surface of the cone.

[0042] The lifting assembly also includes a return spring, which is sleeved with the guide column in a one-to-one correspondence. The two ends of the return spring are respectively disposed on the lower surface of the cantilever and the upper surface of the lower lifting platform.

[0043] The lifting assembly also includes an upper lifting platform, which is located above the cantilever, and the upper end of each guide column is located at the edge of the lower surface of the upper lifting platform.

[0044] The positioning fixture has a through groove in the middle of its upper surface, and the rectangular groove is located at the center of the bottom of the through groove. The width of the through groove is smaller than the width of the lower lifting platform.

[0045] The elastic element is a rectangular rubber ring.

[0046] This embodiment provides a screw manufactured using the screw riveting and positioning device described in the above embodiment. Specifically, it includes a screw body and a boat-shaped sheet metal part. The upper surface of the boat-shaped sheet metal part has a boat-shaped groove, which is approximately an isosceles trapezoidal groove, wider at the top and narrower at the bottom. Mounting holes are provided at both ends of the boat-shaped groove, and a riveting hole is provided at the center of the groove. The upper end of the screw body is riveted into the riveting hole, and the lower end of the screw body has external threads. A rectangular plane is provided at the center of both the lower end of the boat-shaped sheet metal part and the bottom of the boat-shaped groove. The lower end of the screw body is inserted into a circular insertion hole, and the upper end of the screw body is positioned within the rectangular groove. The lower end of the positioning block is positioned on the rectangular plane at the center of the bottom of the boat-shaped groove. Utilizing the rectangular planes at the bottom of both the boat-shaped groove and the lower end of the boat-shaped sheet metal part, the positioning block positions the boat-shaped sheet metal part and the screw body.

[0047] The working principle of this utility model is as follows: The lifting device is used to drive the cantilever to descend and ascend. When the cantilever descends, the lower surface of the lower lifting platform contacts the upper surface of the positioning fixture. The lower lifting platform stops descending due to obstruction. At this time, the cantilever continues to descend, causing the push rod on the lower surface of the cantilever to insert between multiple positioning blocks. The cone at the lower end of the push rod pushes open the first guide surface of the positioning blocks, causing the multiple positioning blocks to move horizontally away from the cone. The multiple positioning blocks, moving away from each other, position the rectangular plane at the center of the bottom of the boat-shaped groove, thus positioning the boat-shaped groove of various sizes of boat-shaped sheet metal parts.

[0048] The positioning fixture uses a circular insertion hole and a rectangular groove to position the screw. The positioning screw passes through the rivet hole at the center of the boat-shaped sheet metal part. The positioning block is used to position the rectangular plane at the bottom of the boat-shaped groove. The positioning block is used to quickly position the boat-shaped sheet metal part, and the positioning fixture is used to quickly position the positioning screw.

[0049] The technical features of the embodiments described above can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of this utility model, and these should all be considered to be within the scope of this specification.

Claims

1. A screw riveting and positioning device, characterized in that: include: A positioning fixture, wherein a rectangular groove for positioning a workpiece is provided at the center of the positioning fixture, and a circular insertion hole for positioning the lower end of the workpiece is provided at the center of the bottom of the rectangular groove. A cantilever, wherein the cantilever is disposed above the positioning fixture; A lifting device is provided on one side of the positioning fixture. The cantilever and the lifting device are connected sequentially from top to bottom. The lifting device drives the cantilever to move in the vertical direction. A push rod is disposed at one end of the lower surface of the cantilever; A lifting assembly includes a lower lifting platform, several guide columns, and several positioning blocks. The cantilever, top rod, lower lifting platform, and positioning fixture are arranged sequentially from top to bottom. The guide columns are spaced around the top rod, and each guide column is slidably mounted on the cantilever in a vertical direction. The lower end of each guide column is located at the edge of the upper surface of the lower lifting platform. The positioning blocks are evenly spaced around the center line of the top rod at the center position of the lower lifting platform. Each positioning block is slidably mounted on the lower lifting platform in a radial direction along the top rod. Each positioning block has a first guide surface at one end near the center line of the top rod. A cone protrudes from the lower surface of the top rod, and the first guide surface and the conical surface of the cone are coplanar. The elastic element, and the upper end of each positioning block is sleeved inside the elastic element.

2. The screw riveting and positioning device according to claim 1, characterized in that: The positioning block is projected vertically downwards into the interior of the rectangular groove, and the sliding direction of the positioning block is set along the diagonal of the rectangular groove.

3. The screw riveting and positioning device according to claim 2, characterized in that: The positioning block includes a T-shaped block and a fixing block, which are detachably connected from top to bottom. A cross-shaped sliding groove is provided at the center of the lower lifting platform. The lower end of the T-shaped block is slidably disposed inside the sliding groove. The fixing block is disposed below the lower lifting platform and is interference-fitted with the sliding groove. A stepped groove is provided at one end of the fixing block near the center line of the top rod. The stepped grooves are connected end to end to form a circular groove.

4. The screw riveting and positioning device according to claim 1, characterized in that: The lifting assembly also includes several limiting plates, which are respectively arranged on the upper end of the positioning block. The elastic element is sandwiched between the end of the limiting plate away from the center line of the top rod and the upper surface of the lower lifting platform.

5. The screw riveting and positioning device according to claim 4, characterized in that: Each of the limiting plates has a second guide surface at one end near the center line of the top rod, and the second guide surface is coplanar with the cone surface of the cone.

6. The screw riveting and positioning device according to claim 1, characterized in that: The lifting assembly also includes a return spring, which is sleeved with the guide column in a one-to-one correspondence. The two ends of the return spring are respectively disposed on the lower surface of the cantilever and the upper surface of the lower lifting platform.

7. The screw riveting and positioning device according to claim 1, characterized in that: The lifting assembly also includes an upper lifting platform, which is located above the cantilever, and the upper end of each guide column is located at the edge of the lower surface of the upper lifting platform.

8. The screw riveting and positioning device according to claim 1, characterized in that: The positioning fixture has a through groove in the middle of its upper surface, and the rectangular groove is located at the center of the bottom of the through groove. The width of the through groove is smaller than the width of the lower lifting platform.

9. The screw riveting and positioning device according to claim 1, characterized in that: The elastic element is a rectangular rubber ring.

10. A screw, characterized in that: The screw is manufactured using the screw riveting and positioning device according to any one of claims 1 to 9, comprising a screw body and a boat-shaped sheet metal part. The upper surface of the boat-shaped sheet metal part is provided with a boat-shaped groove, both ends of the boat-shaped groove are provided with mounting holes, and the center of the boat-shaped groove is provided with a riveting hole. The upper end of the screw body is riveted into the riveting hole, and the lower end of the screw body is provided with an external thread. The lower end of the boat-shaped sheet metal part and the center of the bottom of the boat-shaped groove are both provided with rectangular planes.

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