Positioning pin of automobile welding fixture

Abstract

The utility model discloses an automobile welding fixture positioning pin, and relates to the technical field of positioning pins. The positioning device comprises a pin hole, a positioning pin is arranged in the pin hole, the positioning pin is of an inverted-truncated-cone-shaped structure with the wide upper portion and the narrow lower portion, an inner supporting assembly used for fixing the positioning pin into the pin hole is arranged at the bottom end of the positioning pin, and a fastening assembly used for stabilizing the inner supporting effect of the inner supporting assembly is arranged at the top end of the positioning pin. A handle assembly used for adjusting the inner supporting assembly is arranged at the top end of the positioning pin. After a workpiece is preliminarily placed through mutual matching of the pin hole and the positioning pin, the inner supporting assembly is adjusted to be unfolded in the pin hole to play an inner supporting role, so that the positioning pin is effectively fixed in the pin hole, the fastening assembly plays a role in effectively stabilizing the current inner supporting state of the inner supporting assembly, and the inner supporting assembly is prevented from being damaged. The handle assembly is used for conveniently adjusting the inner supporting assembly, so that the inner supporting assembly can be conveniently retracted or unfolded.

Description

Technical Field

[0001] This utility model relates to the field of positioning pin technology, specifically to a positioning pin for an automotive welding fixture. Background Technology

[0002] Locating pins, or simply locating pins, are used in automotive welding fixtures to determine the precise position of automotive parts within the welding fixture. They contact the workpiece's locating reference hole via a cylindrical surface, ensuring accurate positioning of the part within the assembly fixture. Locating pins are particularly important in automotive body assembly welding; typically, two locating pins are used to restrict the five degrees of freedom of the sheet metal part, ensuring that the overall structure after welding meets design requirements.

[0003] Currently, the locating pins used in automotive welding fixtures on the market are usually designed and manufactured according to specific diameters. Therefore, they can only be matched with pin holes and workpiece locating holes of the corresponding diameter. Although this design ensures the accuracy and stability of positioning to a certain extent, it also limits its application range, increases the manufacturing cost of the fixture and the complexity of replacing the locating pins. Therefore, a new type of locating pin for automotive welding fixtures is proposed. Utility Model Content

[0004] The purpose of this utility model is to solve the problem that the positioning pins used in current automotive welding fixtures can only match the pin holes and workpiece positioning holes of the corresponding diameter. This utility model provides a positioning pin for automotive welding fixtures.

[0005] To achieve the above objectives, this utility model specifically adopts the following technical solution:

[0006] A positioning pin for an automotive welding fixture includes a pin hole, inside which a positioning pin is disposed. The positioning pin has an inverted frustum-shaped structure that is wider at the top and narrower at the bottom. The bottom end of the positioning pin is provided with an inner support component for fixing the positioning pin inside the pin hole. The top end of the positioning pin is provided with a fastening component for stabilizing the inner support effect of the inner support component. The top end of the positioning pin is provided with a handle component for adjusting the inner support component.

[0007] Furthermore, the inner support assembly includes a circular hole, the bottom end of the positioning pin has a circular hole, a circular rod is movably installed inside the circular hole, a turntable is fixedly installed at the top end of the circular rod, two strip frames are fixedly installed at the bottom of the positioning pin, a base plate is fixedly installed at the bottom end of the two strip frames, a bidirectional screw is movably installed at the top of the base plate, the bidirectional screw is fixedly connected to the circular rod, a square block is threaded to both ends of the bidirectional screw, a U-shaped block is fixedly installed on both sides of the square block, each U-shaped block is movably installed inside the adjacent strip frame, a rotating rod is rotatably installed inside each U-shaped block, every two adjacent rotating rods are rotatably connected, a U-shaped frame is rotatably connected to the end of each rotating rod away from the U-shaped block, an arc plate is provided on the side of the two strip frames away from each other, a groove is opened on the side of each arc plate near the strip frame, a slider is fixedly installed on the side wall of each U-shaped frame, and each slider is movably installed inside the adjacent groove.

[0008] Furthermore, the inner support assembly also includes rubber pads, with rubber pads fixedly installed on the opposite sides of the two arc-shaped plates. The rubber pads are made of elastic rubber material.

[0009] Furthermore, the fastening assembly includes L-shaped rods, and three evenly distributed detachable L-shaped rods are provided on the side wall of the turntable. Each L-shaped rod has a bolt threaded to its vertical end, and an anti-slip pad is fixedly installed at the end of each bolt near the positioning pin. The anti-slip pad is made of elastic rubber material.

[0010] Furthermore, the fastening assembly also includes grooves, with grooves provided on the top of the turntable corresponding to the position of each L-shaped rod. A connecting block is movably installed inside each groove, and each connecting block is fixedly connected to the adjacent L-shaped rod. A screw is threaded onto each connecting block, and the bottom end of each screw is threaded into the interior of a locating pin.

[0011] Furthermore, the handle assembly includes a hexagonal groove, the top of the turntable has a hexagonal groove, a hexagonal block is movably installed inside the hexagonal groove, a handle is fixedly installed on the top of the hexagonal block, a magnetic block one is embedded in the bottom surface of the inside of the hexagonal groove, a magnetic block two is embedded in the bottom of the hexagonal block, and the magnetic block two and the magnetic block one attract each other.

[0012] The beneficial effects of this utility model are as follows:

[0013] 1. This utility model first aligns the positioning hole and pin hole on the workpiece, and then inserts the positioning pin into the pin hole and the positioning hole on the workpiece. Since the positioning pin is an inverted frustum-shaped structure that is wider at the top and narrower at the bottom, the positioning pin can be inserted into pin holes and workpiece positioning holes of different diameters. After the workpiece is initially positioned by the cooperation of the pin hole and the positioning pin, the inner support component is adjusted to unfold inside the pin hole to play an inner support role, thereby effectively fixing the positioning pin inside the pin hole. The function of the fastening component is to effectively stabilize the current inner support component in the inner support state. The function of the handle component is to facilitate the adjustment of the inner support component, thereby facilitating the retraction or unfolding of the inner support component. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0015] Figure 2 This is an exploded view of a partial structure of the internal support component of this utility model;

[0016] Figure 3 This is a detailed schematic diagram of the fastening assembly and handle assembly of this utility model;

[0017] Reference numerals: 1. Pin hole; 2. Locating pin; 3. Inner support assembly; 301. Round hole; 302. Round rod; 303. Turntable; 304. Strip frame; 305. Base plate; 306. Bidirectional screw; 307. Square block; 308. U-shaped block; 309. Rotating rod; 310. U-shaped frame; 311. Arc plate; 312. Slide groove; 313. Slider; 314. Rubber pad; 4. Fastening assembly; 401. L-shaped rod; 402. Bolt; 403. Anti-slip pad; 404. Groove; 405. Connecting block; 406. Screw; 5. Handle assembly; 501. Hexagonal groove; 502. Hexagonal block; 503. Handle; 504. Magnetic block one; 505. Magnetic block two. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0019] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0020] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0021] In the description of the embodiments of this utility model, it should be noted that the terms "inner", "outer", "upper", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship that the utility model product is usually placed in during use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0022] like Figures 1 to 3 As shown, a positioning pin for an automotive welding fixture includes a pin hole 1, inside which a positioning pin 2 is disposed. The positioning pin 2 has an inverted frustum-shaped structure that is wider at the top and narrower at the bottom. An inner support assembly 3 is provided at the bottom of the positioning pin 2 for fixing the positioning pin 2 inside the pin hole 1. A fastening assembly 4 is provided at the top of the positioning pin 2 for stabilizing the inner support effect of the inner support assembly 3. A handle assembly 5 is provided at the top of the positioning pin 2 for adjusting the inner support assembly 3. It should be noted that, firstly, the positioning hole on the workpiece is aligned with the pin hole 1, and then the positioning pin 2 is inserted into the pin hole 1 and the positioning pin on the workpiece. Because the positioning pin 2 has an inverted frustum-shaped structure that is wider at the top and narrower at the bottom, the positioning pin 2 can be inserted into the pin hole 1 and the workpiece positioning hole of different diameters. After the workpiece is initially positioned by the cooperation of the pin hole 1 and the positioning pin 2, the inner support component 3 is adjusted to expand inside the pin hole 1 to play an inner support role, thereby effectively fixing the positioning pin 2 inside the pin hole 1. The function of the fastening component 4 is to effectively stabilize the current inner support component 3 in its inner support state. The function of the handle component 5 is to facilitate the adjustment of the inner support component 3, thereby facilitating the retraction or expansion of the inner support component 3.

[0023] like Figures 1 to 3As shown, the inner support assembly 3 includes a circular hole 301. A circular hole 301 is formed at the bottom end of the positioning pin 2. A circular rod 302 is movably installed inside the circular hole 301. A turntable 303 is fixedly installed at the top end of the circular rod 302. Two strip frames 304 are fixedly installed at the bottom of the positioning pin 2. A base plate 305 is fixedly installed at the bottom ends of the two strip frames 304. A bidirectional screw 306 is movably installed at the top of the base plate 305. The bidirectional screw 306 is fixedly connected to the circular rod 302. A square block 307 is threaded to both ends of the bidirectional screw 306. U-shaped blocks 307 are fixedly installed on both sides of the square block 307. 8. Each U-shaped block 308 is movably installed inside the adjacent strip frame 304. A rotating rod 309 is rotatably installed inside each U-shaped block 308. Every two adjacent rotating rods 309 are rotatably connected. A U-shaped frame 310 is rotatably connected to the end of each rotating rod 309 away from the U-shaped block 308. An arc-shaped plate 311 is provided on the side of each of the two strip frames 304 away from each other. A groove 312 is provided on the side of each arc-shaped plate 311 near the strip frame 304. A slider 313 is fixedly installed on the side wall of each U-shaped frame 310. Each slider 313 is movably installed in the adjacent groove. Inside 312, it should be noted that by reciprocating the rotation of the turntable 303, the rotation of the turntable 303 simultaneously drives the round rod 302 and the bidirectional screw 306 to rotate synchronously. The reciprocating rotation of the bidirectional screw 306 can cause the two cubes 307 to move closer or further apart. When the two cubes 307 move closer together, the two U-shaped blocks 308 in each longitudinal direction move closer together, the obtuse angle formed by the two intersecting rotating rods 309 gradually decreases, the two U-shaped frames 310 in each longitudinal direction move closer together, and each slider 313 slides inside the corresponding groove 312. At the same time, the two ends of each rotating rod 309 respectively move within the corresponding U-shaped groove. The internal rotation of the block 308 and U-shaped frame 310 causes the two arc plates 311 to move away from each other and provide internal support inside the pin hole 1. When the two blocks 307 move away from each other, the two U-shaped blocks 308 in each longitudinal direction move away from each other, and the acute angle formed by the two intersecting rotating rods 309 gradually increases. The two U-shaped frames 310 in each longitudinal direction move away from each other, and each slider 313 slides inside the corresponding slide groove 312. At the same time, the two ends of each rotating rod 309 rotate inside the corresponding U-shaped block 308 and U-shaped frame 310 respectively. The two arc plates 311 move closer to each other to facilitate the removal of the positioning pin 2 from inside the pin hole 1.

[0024] like Figures 1 to 3 As shown, the inner support assembly 3 also includes a rubber pad 314. The rubber pad 314 is fixedly installed on the side of the two arc plates 311 that are far apart from each other. The rubber pad 314 is made of elastic rubber material. It should be noted that since the rubber pad 314 can increase the friction, when the two arc plates 311 are far apart from each other inside the pin hole 1 for inner support, a better inner support effect can be achieved.

[0025] like Figure 1 , Figure 3 As shown, the fastening assembly 4 includes an L-shaped rod 401. Three evenly distributed detachable L-shaped rods 401 are provided on the side wall of the turntable 303. Each L-shaped rod 401 is threaded with a bolt 402 at its vertical end. An anti-slip pad 403 is fixedly installed at the end of each bolt 402 near the positioning pin 2. The anti-slip pad 403 is made of elastic rubber. It should be noted that when the turntable 303 rotates, it will drive the three L-shaped rods 401 to rotate synchronously. Then, the bolts 402 are rotated respectively to make each anti-slip pad 403 fit tightly against the positioning pin 2. Since the anti-slip pad 403 can increase the friction, it can effectively prevent the turntable 303 from rotating and ensure the internal support effect of the inner support assembly 3 inside the pin hole 1.

[0026] like Figure 1 , Figure 3 As shown, the fastening assembly 4 also includes a groove 404. The top of the turntable 303 has a groove 404 corresponding to the position of each L-shaped rod 401. A connecting block 405 is movably installed inside each groove 404. Each connecting block 405 is fixedly connected to the adjacent L-shaped rod 401. Each connecting block 405 is threaded with a screw 406. The bottom end of each screw 406 is threaded to the inside of the positioning pin 2. It should be noted that if it is not necessary to restrict the rotation of the turntable 303, each screw 406 can be rotated to disengage from the positioning pin 2, and each connecting block 405 can be removed from the inside of the corresponding groove 404, thereby disassembling the L-shaped rod 401.

[0027] like Figure 1 , Figure 3 As shown, the handle assembly 5 includes a hexagonal slot 501. The top of the turntable 303 has a hexagonal slot 501. A hexagonal block 502 is movably installed inside the hexagonal slot 501. A handle 503 is fixedly installed on the top of the hexagonal block 502. A magnetic block 1 504 is embedded in the bottom surface of the hexagonal slot 501. A magnetic block 2 505 is embedded in the bottom of the hexagonal block 502. The magnetic block 2 505 and the magnetic block 1 504 attract each other. It should be noted that when the turntable 303 is rotated, the hexagonal block 502 can be placed inside the hexagonal slot 501. Then, by rotating the handle 503, the turntable 303 can be driven to rotate synchronously. The magnetic block 2 505 and the magnetic block 1 504 attract each other, which can ensure that the hexagonal block 502 can be stably placed inside the hexagonal slot 501 when the handle 503 is held.

[0028] In summary:

[0029] First, align the positioning hole on the workpiece with the pin hole 1. Then, insert the positioning pin 2 into the pin hole 1 and the positioning hole on the workpiece. Since the positioning pin 2 is an inverted frustum-shaped structure that is wider at the top and narrower at the bottom, it can be inserted into pin holes 1 and workpiece positioning holes of different diameters. After the workpiece is initially positioned by the cooperation of the pin hole 1 and the positioning pin 2, adjust the inner support component 3 to expand it inside the pin hole 1 to provide inner support, thereby effectively fixing the positioning pin 2 inside the pin hole 1. The function of the fastening component 4 is to effectively stabilize the current inner support component 3 in its inner support state. The function of the handle component 5 is to facilitate the adjustment of the inner support component 3, thereby facilitating the retraction or expansion of the inner support component 3.

[0030] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. An automotive welding fixture positioning pin, characterized by, The application relates to a positioning pin, which comprises a pin hole (1), the inside of the pin hole (1) is provided with a positioning pin (2) in an upside-wide-down-narrow inverted circular table structure, the bottom end of the positioning pin (2) is provided with an inner support assembly (3) for fixing the positioning pin (2) in the pin hole (1), the top end of the positioning pin (2) is provided with a fastening assembly (4) for stabilizing the inner support effect of the inner support assembly (3), and the top end of the positioning pin (2) is provided with a handle assembly (5) for adjusting the inner support assembly (3).

2. The positioning pin of claim 1, wherein, The inner support assembly (3) comprises a circular hole (301) formed in the bottom end of the positioning pin (2), a circular rod (302) movably mounted in the inside of the circular hole (301), a rotating disc (303) fixedly mounted at the top end of the circular rod (302), two strip-shaped frames (304) fixedly mounted at the bottom of the positioning pin (2), a bottom plate (305) fixedly mounted at the bottom ends of the two strip-shaped frames (304), a bidirectional screw rod (306) movably mounted at the top of the bottom plate (305) and fixedly connected with the circular rod (302), square blocks (307) threadedly connected at the two ends of the bidirectional screw rod (306), U-shaped blocks (308) fixedly mounted at the two sides of the square blocks (307), the U-shaped blocks (308) movably mounted in the adjacent strip-shaped frames (304), rotating rods (309) rotatably mounted in the U-shaped blocks (308), the adjacent two rotating rods (309) cross-rotatably connected, U-shaped frames (310) rotatably connected to the ends of the rotating rods (309) away from the U-shaped blocks (308), arc-shaped plates (311) arranged at the sides of the two strip-shaped frames (304) away from each other, sliding grooves (312) formed in the sides of the arc-shaped plates (311) close to the strip-shaped frames (304), and sliding blocks (313) fixedly mounted on the side walls of the U-shaped frames (310) and movably mounted in the adjacent sliding grooves (312).

3. The positioning pin of claim 2, wherein, The inner support assembly (3) further comprises rubber pads (314) fixedly mounted at the sides of the two arc-shaped plates (311) away from each other, and the rubber pads (314) are made of elastic rubber material.

4. The positioning pin of claim 2, wherein, The fastening assembly (4) comprises L-shaped rods (401), three detachable L-shaped rods (401) are arranged on the side wall of the rotating disc (303), screws (402) are threadedly connected to the vertical ends of the L-shaped rods (401), anti-skid pads (403) made of elastic rubber material are fixedly mounted at the ends of the screws (402) close to the positioning pin (2), and the anti-skid pads (403) are fixedly mounted at the ends of the screws (402) close to the positioning pin (2).

5. The positioning pin of claim 4, wherein, The fastening assembly (4) further comprises recesses (404), the top of the rotating disc (303) is provided with the recesses (404) corresponding to the positions of each L-shaped rod (401), the inside of each recess (404) movably installs a connecting block (405), each connecting block (405) is fixedly connected with the adjacent L-shaped rod (401), each connecting block (405) is threadedly connected with a screw (406), and the bottom end of each screw (406) is threadedly connected to the inside of the positioning pin (2).

6. The positioning pin of claim 2, wherein, The handle assembly (5) comprises a hexagonal groove (501), the top of the rotating disc (303) is provided with the hexagonal groove (501), the inside of the hexagonal groove (501) movably installs a hexagonal block (502), the top of the hexagonal block (502) is fixedly installed with a handle (503), the inside of the hexagonal groove (501) is embeddedly installed with a magnetic block one (504), the bottom of the hexagonal block (502) is embeddedly installed with a magnetic block two (505), and the magnetic block two (505) and the magnetic block one (504) are mutually adsorbed.

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