Gauge positioning pin structure

Abstract

The utility model relates to the technical field of new energy automobile part manufacturing, in particular to a gauge positioning pin structure which comprises a guide head (1) and a positioning section (2). A connecting structure is arranged between the guide head (1) and the positioning section (2); the positioning section (2) is connected to the gauge mounting plate (3); a fastening structure is arranged between the positioning section (2) and the gauge mounting plate (3); the positioning pin is divided into the guide head and the positioning section and is made of two different materials, so that the positioning pin can bear large load, and a workpiece positioning hole is prevented from being abraded; according to the positioning pin of the split structure, even if the nylon guide head for guiding at the upper end needs to be replaced due to abrasion, the structure also has good interchangeability, and the cost is greatly reduced; the fastening structure can ensure tight connection between the positioning pin and the gauge mounting plate, and can effectively prevent the positioning pin from being separated from the gauge mounting plate during working to cause positioning failure of the longitudinal beam.

Description

Technical Field

[0001] The utility model relates to the technical field of new energy vehicle parts manufacturing. Specifically, the utility model relates to a positioning pin structure for a checking fixture. Background Art

[0002] The positioning pins of the conventional positioning devices on the market are required to have strong wear resistance and hardness, accurate dimensions and geometric shapes, and are mostly made of steel. Usually, the positioning pin is an integral structure, and the working part is mainly composed of a cylindrical positioning part and a conical guiding part. The upper conical guiding head is used to guide into the positioning hole of the workpiece, and the lower cylindrical positioning section is used to cooperate with the positioning hole of the workpiece for accurate positioning; the positioning pin and the positioning hole are in clearance fit, with a unilateral clearance of only 0.05. The positioning holes are distributed at both ends of the longitudinal beam, and the widths and weights of both ends of the longitudinal beam are different. Therefore, when the longitudinal beam is manually placed on the checking fixture, it is impossible to ensure that the positioning holes at both ends of the longitudinal beam accurately and horizontally fall into the positioning pins of the checking fixture at the same time. Always one end falls first and the other end falls later. And the hardness of the positioning pin material is much greater than that of the longitudinal beam, and it is inevitable to collide during contact, resulting in serious wear of the positioning holes of the longitudinal beam, affecting the product quality and the positioning accuracy of the subsequent general assembly and the mating parts; at the same time, the connection between the positioning section of the existing positioning pin and the checking fixture is unstable and is prone to falling off during the operation, resulting in the positioning failure of the longitudinal beam.

[0003] After retrieval, the applicant found that the Chinese patent document with the publication number of 215358042U discloses a positioning pin and positioning pin hole alignment device for positioning pin installation on December 31, 2021. The device includes a horizontally arranged outer cylinder and a positioning pin guiding cylinder installed in the outer cylinder. The front end of the outer cylinder is provided with an inlet and outlet of the positioning pin guiding cylinder, and the front end of the positioning pin guiding cylinder is provided with a positioning pin outlet; a positioning pin clamp is installed on the top of the positioning pin guiding cylinder, and a positioning pin inlet is provided on the top of the positioning pin clamp. A guiding hole for the positioning pin clamp to extend out and move along the axial direction of the outer cylinder is opened on the outer cylinder; a guiding inclined surface is provided in the positioning pin guiding cylinder, a power device is installed at the rear end of the outer cylinder, and a return spring is sleeved on the positioning pin guiding cylinder; this device also cannot solve the above technical problems.

[0004] Therefore, in order to improve or solve at least one of the above problems, it is necessary to optimize the existing positioning pin structure of the checking fixture. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a positioning pin structure for a checking fixture that can avoid scratching the longitudinal beam and is firmly installed on the checking fixture.

[0006] In order to solve the above technical problems, the technical solution adopted by the utility model is: a positioning pin structure for a checking fixture, including a guiding head and a positioning section; a connecting structure is provided between the guiding head and the positioning section; the positioning section is connected with a checking fixture mounting plate; a fastening structure is provided between the positioning section and the checking fixture mounting plate.

[0007] The connecting structure includes a threaded post; the threaded post is provided at the top of the positioning section; a threaded hole is provided on the guiding head; the threaded post is sleeved in the threaded hole.

[0008] The threaded hole is a through hole; internal threads are provided in the threaded hole; external threads matching the internal threads are provided on the threaded post.

[0009] The fastening structure includes a mounting post; the mounting post is provided at the bottom of the positioning section; mounting holes are provided on the fixture mounting plate; the mounting post is sleeved in the mounting holes.

[0010] A connecting threaded hole is provided at the bottom of the mounting hole; a connecting threaded post is provided at the bottom of the mounting post; the connecting threaded post is connected in the connecting threaded hole.

[0011] A fixing plate is provided on the positioning section; the fixing plate is arranged along the edge of the positioning section; the fixing plate is connected to the fixture mounting plate.

[0012] The fixture mounting plate includes a mounting cross plate; mounting side plates are provided at the ends of the mounting cross plate; the fixing plate is connected to the top surface of the mounting cross plate, and the mounting holes are provided.

[0013] Bolts are provided on the fixing plate; bolt holes are provided on the top surface of the mounting cross plate, and the bolts are connected in the bolt holes.

[0014] Connecting holes are provided on the mounting side plates.

[0015] The guiding head is made of nylon; the positioning section is a 45# steel section.

[0016] The beneficial effects of this application are as follows:

[0017] 1. A threaded hole is provided on the guiding head of this application, and a threaded post is provided on the positioning section; the stable connection of the guiding head on the positioning section can be realized through the cooperation of the threaded hole and the threaded post; and the installation and disassembly operations of the guiding head are convenient; and the guiding head with a suitable size can be flexibly replaced according to the aperture of the longitudinal beam positioning hole, making the applicability of this device wider.

[0018] 2. The nylon material used for the guiding head of this application has relatively low strength and hardness, but has good toughness and elasticity and certain impact resistance; the 45# steel used for the positioning section has relatively high strength and hardness and can be applicable to the relatively high mechanical stress and impact load here; and the length of the positioning section of this device is reduced, shortening the longitudinal beam positioning stroke; the longitudinal beam to be detected is made of aluminum-magnesium alloy material. When the longitudinal beam contacts the nylon guiding head, the nylon material has relatively low hardness, which can avoid the wear of the longitudinal beam positioning hole.

[0019] In this application, the positioning pin is divided into two parts and made of two different materials, which can not only ensure that the positioning pin can bear a large load, but also avoid the wear of the positioning hole of the workpiece. For this positioning pin with a split structure, even if the nylon head at the upper end for guiding needs to be replaced due to wear, this structure has good interchangeability and greatly reduces the cost.

[0020] 3. An installation post is provided at the bottom of the positioning section of this application, and a connecting threaded post is provided at the bottom of the installation post; an installation hole is provided on the fixture installation plate, and a connecting threaded hole is provided at the bottom of the installation hole. By installing the installation post in the installation hole, the bending resistance of the positioning pin can be enhanced; through the cooperation of the connecting screw hole and the connecting threaded post, the positioning section can be stably connected to the fixture installation plate; and a fixing plate is fixedly connected to the side of the positioning section, and the fixing plate is connected to the fixture installation plate by bolts; through the cooperation of the installation post and the installation hole, the cooperation of the connecting threaded post and the connecting threaded hole, and the bolt connection of the fixing plate, it can ensure the tight connection between the positioning pin and the fixture installation plate, and can effectively prevent the positioning pin from disengaging from the fixture installation plate during work, resulting in the positioning failure of the longitudinal beam. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The following further details the specific implementation manners of the present utility model in conjunction with the drawings, where:

[0022] Figure 1 is a schematic structural diagram of the positioning pin structure of this fixture.

[0023] Figure 2 is a cross-sectional view of the positioning pin structure of this fixture.

[0024] Figure 3 is an exploded view of the connection structure between the guiding head and the positioning section of the positioning pin structure of this fixture.

[0025] The markings in the above figures are all:

[0026] The markings in the figure are:

[0027] 1. Guiding head, 101. Threaded hole,

[0028] 2. Positioning section, 201. Threaded post,

[0029] 3. Fixture installation plate, 301. Installation cross plate, 302. Installation side plate,

[0030] 4. Installation post, 401. Installation hole,

[0031] 5. Connecting threaded hole, 501. Connecting threaded post,

[0032] 6. Fixing plate, 601. Bolt,

[0033] 7. Connecting hole. DETAILED DESCRIPTION OF THE INVENTION

[0034] The following will further describe in detail the specific implementation manners of the present utility model with reference to the accompanying drawings and through the description of the embodiments, aiming to help those skilled in the art have a more complete, accurate and in-depth understanding of the inventive concept and technical solutions of the present utility model and facilitate its implementation.

[0035] Figure 1 The shown fixture positioning pin structure includes a guiding head 1 and a positioning section 2; a connecting structure is provided between the guiding head 1 and the positioning section 2; the positioning section 2 is connected to a fixture mounting plate 3; a fastening structure is provided between the positioning section 2 and the fixture mounting plate 3.

[0036] The positioning pin is divided into two parts, namely the guiding head 1 and the positioning section 2, and two different materials are used, which can not only ensure that the positioning pin can bear a large load, but also avoid the wear of the workpiece positioning hole; for this split-structured positioning pin, even if the nylon guiding head 1 at the upper end for guiding needs to be replaced due to wear, this structure has good interchangeability and greatly reduces the cost; the fastening structure can ensure the tight connection between the positioning pin 2 and the fixture mounting plate 3, and can effectively prevent the positioning pin from detaching from the fixture mounting plate 3 during work, resulting in the positioning failure of the longitudinal beam.

[0037] The connecting structure includes a threaded post 201; the threaded post 201 is provided at the top of the positioning section 2; a threaded hole 101 is provided on the guiding head 1; the threaded post 201 is sleeved in the threaded hole 101.

[0038] The guiding head 1 is in a frustum structure; the threaded hole 101 is a through hole and is provided in the middle of the guiding head 1; the guiding head 1 is installed in the positioning hole of the longitudinal beam, so as to realize the positioning of the longitudinal beam; the guiding head 1 is detachably connected to the top of the positioning section 2 through the threaded post 201 and the threaded hole 101; the positioning section 2 is in an inverted frustum structure; the larger end of the positioning section 2 abuts against the guiding head 1; the smaller end of the positioning section 2 abuts against the fixture mounting plate 3.

[0039] The threaded hole 101 is a through hole; internal threads are provided in the threaded hole 101; external threads are provided on the threaded post 201 and are matched with the internal threads.

[0040] The matching of the internal threads and the external threads can realize the stable connection between the guiding head 1 and the positioning section 2 and facilitate the installation and disassembly operations.

[0041] The fastening structure includes a mounting post 4; the mounting post 4 is provided at the bottom of the positioning section 2; a mounting hole 401 is provided on the fixture mounting plate 3; the mounting post 4 is sleeved in the mounting hole 401.

[0042] The mounting post 4 is fixedly connected to the bottom of the positioning section 2; the mounting post 4 is inserted into the mounting hole 401, which can realize the preliminary connection between the positioning pin and the fixture mounting plate 3; the mounting post 4 has a relatively high structural strength. When the mounting post 4 is installed in the mounting hole 401, it can improve the structural strength of the connection between the positioning pin and the fixture mounting plate 3.

[0043] A connecting threaded hole 5 is provided at the bottom of the mounting hole 401; a connecting threaded post 501 is provided at the bottom of the mounting post 4; the connecting threaded post 501 is connected in the connecting threaded hole 5.

[0044] The connecting threaded post 501 is fixedly connected to the bottom of the mounting post 4; the connecting threaded hole 5 and the connecting threaded post 501 are threadedly connected; this can realize the stable connection of the positioning pin on the fixture mounting plate 3; at the same time, it facilitates the installation and disassembly operations of the positioning pin on the fixture mounting plate 3.

[0045] A fixing plate 6 is provided on the positioning section 2; the fixing plate 6 is arranged along the edge of the positioning section 2; the fixing plate 6 is connected to the fixture mounting plate 3.

[0046] The fixing plate 6 is a square plate; the fixing plate 6 extends outward along the circular contour of the positioning section 2; the fixing plate 6 and the positioning section 2 are of an integral structure; the fixing plate 6 is fixedly connected to the fixture mounting plate 3 to further fasten the positioning pin to the fixture mounting plate 3.

[0047] The fixture mounting plate 3 includes a mounting cross plate 301; mounting side plates 302 are provided at the ends of the mounting cross plate 301; the top surface of the mounting cross plate 301 is connected to the fixing plate 6 and is provided with the mounting hole 401.

[0048] The mounting cross plate 301 and the mounting side plates 302 form an L-shaped structure; the mounting hole is provided on the top surface of the mounting cross plate 301, and the positioning section 2 and the guiding head 1 are provided on the top of the mounting cross plate 301.

[0049] Bolts 601 are provided on the fixing plate 6; bolt holes are provided on the top surface of the mounting cross plate 301, and the bolts 601 are connected in the bolt holes.

[0050] Multiple bolts 601 are provided on the fixing plate 6; the ends of the bolts 601 pass through the fixing plate 6 and are connected in the bolt holes, thereby realizing the pressing of the fixing plate 6 on the top surface of the mounting cross plate 301.

[0051] Connection holes 7 are provided on the mounting side plates 302.

[0052] Multiple rows of connection holes 7 are provided on the mounting side plates 302; mounting bolts are provided in the connection holes 7; the mounting side plates 302 are connected to the fixture through the mounting bolts in the connection holes 7; thus, the stable connection between the fixture mounting plate 3 and the fixture is realized.

[0053] The guiding head 1 is a nylon head; the positioning section 2 is a 45# steel section.

[0054] The nylon material used for the guiding head 1 has relatively low strength and hardness, but has good toughness and elasticity, and has a certain impact resistance; the 45# steel used for the positioning section 2 has relatively high strength and hardness, and can be applied to the relatively high mechanical stress and impact load here; moreover, the length of the positioning section 2 is reduced in this device, shortening the positioning stroke of the longitudinal beam; the longitudinal beam to be detected is made of aluminum-magnesium alloy. When the longitudinal beam contacts the nylon guiding head 1, the nylon material has relatively low hardness, which can avoid the wear of the positioning hole of the longitudinal beam.

[0055] The specific working process of the present utility model is as follows:

[0056] Install the mounting post 4 of the positioning section 2 into the mounting hole 401 on the fixture mounting plate 3, and tighten the connecting threaded post 501 in the connecting threaded hole 5; select a guiding head 1 with a suitable size according to the positioning hole of the longitudinal beam, and install the guiding head 1 on the positioning section 2; install the fixture mounting plate 3 on the fixture through the connecting hole 7, and socket the positioning hole of the longitudinal beam on this positioning pin, then the positioning operation can be realized.

[0057] The present utility model has been described exemplarily in combination with the accompanying drawings. Obviously, the specific implementation of the present utility model is not limited by the above-mentioned manner. As long as various non-substantive improvements are made by adopting the method concept and technical solution of the present utility model; or without improvement, the above-mentioned concept and technical solution of the present utility model are directly applied to other occasions, they are all within the protection scope of the present utility model.

Claims

1. A positioning pin structure of a gauge, characterized in that: It comprises a guide head (1) and a positioning section (2); a connecting structure is provided between the guide head (1) and the positioning section (2); the positioning section (2) is connected to a gauge mounting plate (3); and a fastening structure is provided between the positioning section (2) and the gauge mounting plate (3).

2. A positioning pin structure for a gauge according to claim 1, characterized in that: The connection structure comprises a threaded column (201); the threaded column (201) is arranged at the top of the positioning section (2); a threaded hole (101) is provided on the guide head (1); and the threaded column (201) is sleeved in the threaded hole (101).

3. A positioning pin structure for a gauge according to claim 2, characterized in that: The threaded hole (101) is a through hole; an internal thread is provided in the threaded hole (101); and an external thread matching the internal thread is provided on the threaded column (201).

4. A positioning pin structure for a gauge according to any one of claims 2 to 3, characterized in that: The fastening structure comprises a mounting column (4); the mounting column (4) is arranged at the bottom of the positioning section (2); a mounting hole (401) is provided on the inspection fixture mounting plate (3); and the mounting column (4) is sleeved in the mounting hole (401).

5. A positioning pin structure for a gauge according to claim 4, characterized in that: A connecting threaded hole (5) is provided at the bottom of the mounting hole (401); a connecting threaded column (501) is provided at the bottom of the mounting column (4); and the connecting threaded column (501) is connected to the connecting threaded hole (5).

6. A positioning pin structure for a gauge according to claim 5, characterized in that: A fixing plate (6) is provided on the positioning section (2); the fixing plate (6) is arranged along the edge of the positioning section (2); and the fixing plate (6) is connected to the gauge mounting plate (3).

7. A positioning pin structure for a gauge according to claim 6, characterized in that: The gauge mounting plate (3) comprises a mounting transverse plate (301); a mounting side plate (302) is provided at the end of the mounting transverse plate (301); the top surface of the mounting transverse plate (301) is connected to the fixing plate (6) and is provided with the mounting hole (401).

8. A positioning pin structure for a gauge according to claim 7, characterized in that: The fixing plate (6) is provided with bolts (601); the top surface of the mounting transverse plate (301) is provided with bolt holes, and the bolts (601) are connected in the bolt holes.

9. A positioning pin structure for a gauge according to claim 8, characterized in that: The mounting side plate (302) is provided with a connecting hole (7).

10. A positioning pin structure for a gauge according to any one of claims 5 to 9, characterized in that: The guide head (1) is a nylon head; the positioning section (2) is a No. 45 steel section.

Images