A positioning tool

Abstract

The utility model relates to a kind of positioning tool, it is related to the technical field of parts assembly.For the poor universality of existing positioning tool problem.The positioning tool includes main support and positioning assembly;Positioning assembly includes base and locating column, locating column is installed in main support by base, and the end of locating column extends along the first direction away from main support;Wherein, base includes first installation part and second installation part, locating column is connected in second installation part;First installation part is movably connected in main support and can move along second direction, and second installation part is movably connected in first installation part and can move along third direction;First direction, second direction and third direction are perpendicular to each other.Based on the mobility of base in multidirection, by the compound of movement, so that locating column can move in a plane and adjust position, realize the adjustability of the positioning position for assembly, to improve the universality of positioning tool, meet different use requirements.

Description

Technical Field

[0001] This utility model relates to the field of component assembly technology, specifically to a positioning tooling. Background Technology

[0002] In the production of vehicles and other products, numerous assembly operations are involved, such as the assembly of the subframe and H-beam of a vehicle chassis. Assembly precision is a critical factor in these operations, as it directly affects various performance indicators of the product. Taking the assembly of the subframe and H-beam as an example, excessive deviations in their assembly precision can easily lead to chassis performance problems.

[0003] Therefore, positioning fixtures are currently used to position the parts to be assembled in order to improve assembly accuracy. The main approach is to set multiple positioning supports on the support. These supports can cooperate with specific structures on the parts (such as holes, slots, and protrusions), thereby positioning the parts through multiple positioning supports to maintain assembly accuracy.

[0004] However, in practical applications, the above solutions have poor versatility. For example, existing positioning fixtures cannot meet the needs of using parts of the same type but different specifications, or when the positioning points on the parts need to be changed for some reason. Utility Model Content

[0005] The purpose of this invention is to propose a positioning fixture to solve the problem of poor versatility of existing positioning fixtures.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] This application provides a positioning fixture for positioning an assembly. The positioning fixture includes a main support and a positioning component. The positioning component includes a base and a positioning post. The positioning post is mounted on the main support via the base, and one end of the positioning post extends in a first direction away from the main support. The base includes a first mounting portion and a second mounting portion, and the positioning post is connected to the second mounting portion. The first mounting portion is movably connected to the main support and is movable in a second direction perpendicular to the first direction. The second mounting portion is movably connected to the first mounting portion and is movable in a third direction perpendicular to both the first and second directions.

[0008] The positioning fixture provided in this application combines the mobility of the first mounting part and the second mounting part in their respective directions. Through the combination of movements, the base can move in a plane perpendicular to the first direction, thereby adjusting the position of the positioning post in that plane. Based on the adjustability of the positioning post position, it can cooperate with positioning structures at different positions on the assembly to achieve adjustable positioning position for the assembly, thereby improving the versatility of the positioning fixture and meeting different usage requirements.

[0009] In one possible implementation of this application, the main support includes a first support rod extending along a second direction, and the first mounting part is configured as a cylindrical structure, with the first mounting part fitted onto the first support rod.

[0010] In one possible implementation of this application, the first mounting part has a first end and a second end opposite to each other, the first end being open and the second end being closed; the first mounting part is at least partially fitted onto the end of the first support rod through the open end, and a first threaded hole extending in a second direction is provided on the end face of the first support rod; wherein, the positioning fixture further includes a first threaded component, one end of which is connected to the second end and the other end of which engages with the first threaded hole. In this way, by utilizing the engagement of the first threaded component and the first threaded hole, the connection between the first mounting part and the first support rod can be achieved while ensuring the first mounting part is movable, thereby ensuring that the first mounting part is stably positioned in the corresponding location. Furthermore, based on the threaded engagement of the first threaded component and the first threaded hole, the position of the first mounting part can be adjusted with higher precision by rotating the first threaded component.

[0011] In one possible implementation of this application, the portion of the first mounting part near the first end includes a plurality of connecting parts spaced apart circumferentially along the first mounting part, and the connecting parts extend axially along the first mounting part, with the ends of the plurality of connecting parts away from the second end forming an opening. In this way, by constructing notches to form connecting parts, the weight of the first mounting part and even the entire positioning tooling can be reduced.

[0012] In one possible implementation of this application, a guide groove extending in a second direction is provided on the surface of the first support rod, and the first mounting part has a guide portion at least partially accommodated within the guide groove. This provides an improved stability for the first mounting part as it moves on the first support rod, as the guide portion at least partially engages with the guide groove.

[0013] In one possible implementation of this application, the positioning fixture further includes a second threaded component extending in a third direction, and the first mounting portion and the second mounting portion are connected by the second threaded component; wherein, a second threaded hole is provided on the surface of the first mounting portion near the second mounting portion, one end of the second threaded component is connected to the second mounting portion, and the other end is fitted into the second threaded hole; a first gasket is provided between the first mounting portion and the second mounting portion, and the first gasket abuts against the first mounting portion and the second mounting portion respectively.

[0014] In this way, by rotating the second mounting part and utilizing the threaded engagement between the second threaded component and the second threaded hole, the position of the second mounting part relative to the first mounting part in the third direction can be adjusted, and the first washer can apply a force in the third direction to the first mounting part and the second mounting part, thereby achieving the function of locking the second threaded component and the second threaded hole together and preventing loosening.

[0015] In one possible implementation of this application, a third screw hole is provided on the surface of the second mounting part, and the positioning post includes a threaded section, which partially fits into the third screw hole; wherein, a nut is fitted on the threaded section and the portion exposed in the third screw hole, and a second washer is provided between the nut and the surface of the second mounting part.

[0016] In one possible implementation of this application, the positioning component includes multiple bases and multiple positioning posts, with each base corresponding to one of the positioning posts. The positioning posts are used to engage with process holes at different locations on the assembly. In this way, the multiple positioning posts can cooperate with multiple positioning structures at different locations on the assembly to form multiple positioning points, further enhancing the accuracy and reliability of the positioning.

[0017] In one possible implementation of this application, the positioning component includes a plurality of bases and a plurality of positioning posts that correspond one-to-one, the plurality of positioning posts including a portion of first positioning posts and the remaining portion of second positioning posts; the assembly includes a first assembly and a second assembly for mutual assembly, the first positioning posts being used to position the first assembly and the second positioning posts being used to position the second assembly.

[0018] In one possible implementation of this application, the main support includes a plurality of first support rods and a plurality of second support rods. The first support rods extend along a second direction, and a first mounting part is connected to the first support rod. The plurality of first support rods are distributed at intervals along a third direction, and adjacent first support rods are connected by second support rods.

[0019] The beneficial effects of this utility model are:

[0020] (1) Combining the mobility of the first mounting part and the second mounting part of the positioning fixture in their respective directions, the base can move in a plane perpendicular to the first direction through the combination of motion, thereby adjusting the position of the positioning column in the plane. Based on the adjustability of the position of the positioning column, it can cooperate with the positioning structure at different positions on the assembly to achieve the adjustability of the positioning position of the assembly, thereby improving the versatility of the positioning fixture and meeting different usage requirements.

[0021] (2) By utilizing the engagement between the first threaded component and the first threaded hole, the connection between the first mounting part and the first support rod can be achieved while ensuring the first mounting part is movable, thereby ensuring that the first mounting part is stably positioned in the corresponding location. Furthermore, based on the threaded engagement between the first threaded component and the first threaded hole, the position of the first mounting part can be adjusted with higher precision by rotating the first threaded component.

[0022] (3) By constructing a notch to form a connecting part, the weight of the first mounting part and even the entire positioning tooling can be reduced.

[0023] (4) The first mounting part has a guide part that at least partially fits in the guide groove to improve the stability of the first mounting part moving on the first support rod.

[0024] (5) By rotating the second mounting part, the position of the second mounting part relative to the first mounting part in the third direction can be adjusted by utilizing the threaded engagement between the second threaded part and the second threaded hole. The first washer can apply a force in the third direction to the first mounting part and the second mounting part, thereby achieving the function of locking the second threaded part and the second threaded hole together and preventing loosening.

[0025] (6) Multiple positioning posts can cooperate with multiple positioning structures at different positions on the assembly to form multiple positioning points, further enhancing the accuracy and reliability of positioning. Attached Figure Description

[0026] Figure 1 A front view of a positioning tool provided in an embodiment of this application;

[0027] Figure 2 A top view of a positioning fixture provided in an embodiment of this application;

[0028] Figure 3 A bottom view of a positioning fixture provided in an embodiment of this application;

[0029] Figure 4 for Figure 3 A partial schematic diagram of the positioning component;

[0030] Figure 5 for Figure 4 A cross-sectional view of the structure shown;

[0031] Figure 6 for Figure 5 Schematic diagram of section AA;

[0032] Figure 7 for Figure 1 A partial schematic diagram of the positioning component;

[0033] Figure 8 This application provides a schematic diagram of a positioning fixture for positioning two assemblies according to an embodiment of the present application.

[0034] Figure 9 for Figure 8 Side view of the structure shown.

[0035] Figure label:

[0036] 1-Main support, 11-First support rod, 111-First screw hole, 112-Guide groove, 12-Second support rod, 2-Positioning assembly, 21-Base, 211-First mounting part, 211a-First end, 211b-Second end, 2111-Connecting part, 2112-Guide part, 2113-Second screw hole, 212-Second mounting part, 2121-Third screw hole, 22-Positioning post, 22a-First positioning post, 22b-Second positioning post, 221-Threaded section, 3-First threaded component, 4-Second threaded component, 5-First washer, 6-Nut, 7-Second washer, 8-First assembly, 9-Second assembly, 10-Connection point. Detailed Implementation

[0037] The technical solutions of the embodiments of this application will be described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0038] Hereinafter, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature.

[0039] Furthermore, in this application, directional terms such as "upper" and "lower" are defined relative to the orientation of the components shown in the accompanying drawings. It should be understood that these directional terms are relative concepts, used for relative description and clarification, and can change accordingly depending on the orientation of the components in the accompanying drawings.

[0040] In this application, unless otherwise expressly specified and limited, the term "connection" shall be interpreted broadly. For example, "connection" may be a fixed connection, a detachable connection, or an integral part; it may be a direct connection or an indirect connection through an intermediate medium.

[0041] As described in the background section, the assembly effect of components greatly affects the performance of the product. Taking a vehicle as an example, the assembly effect between the components of the vehicle chassis directly affects the performance of the chassis. For example, the assembly effect between the subframe and the H-beam of the vehicle chassis has a particularly significant impact on the chassis performance.

[0042] Taking the assembly of the subframe and H-beam as an example, the traditional assembly method involves bolting the front crossbeam to the integrated front engine compartment casting, positioning the H-beam on a pallet, and bolting the H-beam to the subframe. The subframe is then positioned on the integrated front engine compartment casting, and bolted to both. Simultaneously, bolts are used to connect the front crossbeam and H-beam. This assembly process reveals that the assembly of the subframe and H-beam involves other components, resulting in numerous connection points and a dimensional chain. This can easily lead to the accumulation of assembly or manufacturing deviations, causing later-arranged components to fail to assemble correctly. For example, excessive misalignment of the mounting holes on two components can prevent the mating of bolts and other fasteners.

[0043] Since the assembly of the subframe and H-beam has a particularly significant impact on the vehicle chassis performance, assembling them separately using positioning fixtures can effectively ensure assembly accuracy and avoid excessive assembly deviations. However, because the subframe and H-beam come in various specifications, each with a different positioning position, and because the positioning position may need to be adjusted during actual assembly for other reasons (such as avoiding the assembly operation location for ease of use), the positioning fixture must provide positioning functionality for different positions, i.e., it needs to be adjustable. Current positioning fixtures, however, have poor versatility and struggle to meet this requirement.

[0044] To address the aforementioned problems, this application provides a positioning fixture for positioning assemblies such as subframes and H-beams. Please refer to... Figures 1 to 3 , Figure 1 This is a front view of a positioning tool provided in an embodiment of this application. Figure 2 This is a top view of a positioning fixture provided in an embodiment of this application. Figure 3This is a bottom view of a positioning fixture provided in an embodiment of this application. The main structure of the positioning fixture is a main support 1. A positioning component 2, which directly performs the positioning function, is disposed on the main support 1. The positioning component 2 includes a base 21 disposed on the main support 1 and a positioning post 22 disposed on the base 21. The positioning post 22 is used to cooperate with the positioning structure on the assembly to achieve positioning. The positioning structure on the assembly may include various process holes, process grooves, etc. In order to meet the above requirement of adjustable positioning position, the position of the positioning component 2 on the main support 1 can be adjusted.

[0045] Specifically, when the assembly is positioned using positioning fixtures, the assembly and the main support 1 are distributed along a first direction, so the positioning post 22 extends along the first direction, allowing the end of the positioning post 22 to engage with the corresponding structure on the assembly. Based on this first direction, the base 21 consists of a first mounting part 211 and a second mounting part 212. The first mounting part 211 is connected to the main support 1 and can move on the main support 1 along a second direction perpendicular to the first direction (specifically, it can be reciprocating). The second mounting part 212 is connected to the first mounting part 211 and can move relative to the first mounting part 211 along a third direction, which is perpendicular to both the first and second directions. Figures 1 to 3 The first direction is the Z-axis direction, the second direction is the Y-axis direction, and the third direction is the X-axis direction.

[0046] Based on this, by combining the mobility of the first mounting part 211 and the second mounting part 212 in their respective directions, the base 21 can move in a plane perpendicular to the first direction through the combination of movements, thereby adjusting the position of the positioning post 22 in that plane. Based on the adjustability of the position of the positioning post 22, it can cooperate with positioning structures at different positions on the assembly, thereby achieving the adjustability of the positioning position of the assembly, thus improving the versatility of the positioning fixture and meeting different usage requirements.

[0047] In some embodiments, please refer to Figures 4 to 6 , Figure 4 for Figure 3 A partial schematic diagram of the positioning component 2 in the middle. Figure 5 for Figure 4 The sectional view of the structure shown. Figure 6 for Figure 5 A schematic diagram of section AA. The first mounting part 211 moves along the second direction on the main support 1. Structurally, the first mounting part 211 is configured as a cylindrical structure, such as a round cylinder or a square cylinder. Since the main support 1 includes a first support rod 11 extending along the second direction, by fitting the first mounting part 211 onto the first support rod 11, the mounting part and even the entire base 21 can move along the second direction on the first support rod 11.

[0048] For example, the first mounting part 211 is configured as a square tube structure, and the cross-section of the first support rod 11 is configured as a square, thereby preventing the first mounting part 211 from rotating circumferentially on the first support rod 11 and improving the reliability of the structure.

[0049] In some examples, please refer to [link / reference]. Figures 4 to 6 Based on the movable structure of the first mounting part 211 fitted onto the first support rod 11, a structure for locking the position of the first mounting part 211 is further provided to improve the stability of the position of the first mounting part 211. Specifically, the cylindrical structure of the first mounting part 211 is configured such that the first end 211a is open and the second end 211b is closed. The first mounting part 211 can be fitted onto the end of the first support rod 11 through the opening of the first end 211a. At the same time, a first screw hole 111 is provided on the end face of the first support rod 11, and a first threaded component 3 (such as a bolt, screw, or stud) that mates with the first screw hole 111 is provided on the second end 211b of the first mounting part 211. By utilizing the mate between the first threaded component 3 and the first screw hole 111, the connection between the first mounting part 211 and the first support rod 11 is achieved while ensuring the mobility of the first mounting part 211, thereby ensuring that the first mounting part 211 is stably in the corresponding position. Furthermore, based on the threaded engagement between the first threaded component 3 and the first threaded hole 111, the position of the first mounting part 211 can be adjusted with higher precision by rotating the first threaded component 3.

[0050] Furthermore, the first mounting portion 211 has a certain extension length in the second direction, providing movement space for the first mounting portion 211 to move relative to the first support rod 11 in the second direction. The specific value of the extension length of the first mounting portion 211 in the second direction can be determined according to the required movement stroke of the first mounting portion 211 in the second direction.

[0051] For example, please continue reading Figure 5 The head of the first threaded part 3 can be accommodated in the countersunk hole on the end face of the second end 211b of the first mounting part 211. The first threaded part 3 and the first mounting part 211 are fixed relative to each other in the second direction by using the threaded engagement with the limiting ring on the first threaded part 3.

[0052] In some embodiments, please continue reading Figures 4 to 6 The surface of the first support rod 11 is provided with a guide groove 112 extending in a second direction. Exemplarily, the surface of the second support rod 12 may be provided with multiple guide grooves 112. The first mounting portion 211 has a guide portion 2112 that at least partially engages within the guide groove 112, for improving the stability of the first mounting portion 211 moving on the first support rod 11. Exemplarily, the guide portion 2112 may be a protrusion structure provided on the inner surface of the first mounting portion 211 near the first support rod 11.

[0053] In some embodiments, please continue reading Figures 4 to 6 The portion of the first mounting portion 211 near the first end 211a is composed of multiple connecting portions 2111, which are spaced apart circumferentially along the first mounting portion 211. In actual fabrication, multiple notches spaced apart circumferentially can be constructed on the portion of the first mounting portion 211 near the first end 211a, so that the portion outside the notches forms the aforementioned connecting portions 2111, and the ends of the connecting portions 2111 also form an opening around the first end 211a. By constructing the connecting portions 2111 formed by the notches, the weight of the first mounting portion 211 can be reduced firstly.

[0054] In addition, please continue to refer to Figures 4 to 6 On the other hand, based on the aforementioned connecting portion 2111, the connection between the edge portion of the connecting portion 2111 and the main body of the first mounting portion 211 can be severed along the circumferential edge of the first mounting portion 211. This allows the edge portion to be bent inward toward the first mounting portion 211, forming a protruding structure that protrudes from the inner surface of the first mounting portion 211. This protruding structure can fit into the aforementioned guide groove 112. In other words, the guide portion 2112 is formed by bending the edge portion of the connecting portion 2111, eliminating the need for an additional guide portion 2112 and simplifying the structure of the first mounting portion 211.

[0055] In some embodiments, please continue reading Figures 4 to 6 This allows the second mounting portion 212 to move relative to the first mounting portion 211 in a third direction. Specifically, structurally, the second mounting portion 212 and the first mounting portion 211 are connected by a second threaded member 4. One end of the second threaded member 4 is fixed to the surface of the second mounting portion 212 facing the first mounting portion 211, and the second threaded member 4 engages in a second threaded hole 2113 provided on the surface of the first mounting portion 211 facing the second mounting portion 212. The second threaded member 4 extends in a third direction. Thus, by rotating the second mounting portion 212, the position of the second mounting portion 212 relative to the first mounting portion 211 in a third direction can be adjusted using the threaded engagement of the second threaded member 4 and the second threaded hole 2113.

[0056] In addition, a first gasket 5 is provided between the first mounting part 211 and the second mounting part 212. There can be multiple first gaskets 5. The first gasket 5 is used to fill the void between the first mounting part 211 and the second mounting part 212. The first gasket 5 can apply a force in a third direction to the first mounting part 211 and the second mounting part 212, thereby locking the second threaded part 4 and the second threaded hole 2113 together and preventing loosening, and maintaining the stability of the relative position of the first mounting part 211 and the second mounting part 212.

[0057] It should be noted that since the second threaded part 4 and the first threaded part 3 are both partially fitted inside the first mounting part 211, in order to avoid interference between the second threaded part 4 and the first threaded part 3 inside the first mounting part 211, the second threaded part 4 and the first threaded part 3 need to be completely offset in the first direction.

[0058] In some embodiments, please refer to Figure 7 , Figure 7 for Figure 1 A partial schematic diagram of the positioning component 2. The positioning post 22 can move along the first direction on the second mounting part 212, thereby adjusting the height of the positioning post 22 relative to the main support 1 to further meet more needs. Specifically, a portion of the positioning post 22 is a threaded section 221, which can fit into the third threaded hole 2121 of the second mounting part 212. Based on the threaded fit, the positioning post 22 can be adjusted in position by rotating and moving in the first direction.

[0059] In addition, a nut 6 is fitted to the portion of the threaded section 221 outside the third threaded hole 2121. A second washer 7 is provided between the nut 6 and the surface where the third threaded hole 2121 is located on the second mounting part 212. The second washer 7 can fill the gap between the nut 6 and the second mounting part 212. At the same time, the second washer 7 can also apply a force along the first direction to the nut 6 and the second mounting part 212, thereby locking the positioning post 22 and the third threaded hole 2121 together and preventing loosening, thus maintaining the stability of the relative position of the positioning post 22 and the second mounting part 212.

[0060] In some embodiments, depending on the number of positioning points required for the assembly, the positioning component 2 may include multiple positioning posts 22 and cooperate with multiple bases 21 to achieve position adjustment, thereby cooperating with multiple positioning structures at different positions on the assembly to form multiple positioning points, further enhancing the accuracy and reliability of positioning.

[0061] In some embodiments, the main support 1 includes a plurality of first support rods 11, which extend along a second direction and are spaced apart along a third direction. Based on the aforementioned cooperation relationship between the first mounting portion 211 and the first support rod 11, both ends of the first support rod 11 can be respectively fitted by the first mounting portions 211 of two bases 21. For example, as... Figure 1 and Figure 2 As shown, the main support 1 includes two first support rods 11, and each first support rod 11 has a base 21 at both ends, that is, there are four bases 21 and four positioning columns 22 in total.

[0062] In addition, the main support 1 also includes a plurality of second support rods 12, which are used to connect two adjacent first support rods 11 to form the main support 1 together.

[0063] In some examples, please refer to Figure 8 and Figure 9 , Figure 8 This application provides a schematic diagram of a positioning fixture for positioning two assemblies, as described in an embodiment. Figure 9 for Figure 8 The diagram shows a side view of the structure. For the assembly of the first assembly 8 and the second assembly 9, the plurality of positioning posts 22 includes a portion of first positioning posts 22a and a remaining portion of second positioning posts 22b, for example, two first positioning posts 22a and two second positioning posts 22b. The first positioning posts 22a position the first assembly 8, and the second positioning posts 22b position the second assembly 9, ensuring that the connection structure (e.g., the eyelet structure) at their connection point 10 is aligned with each other, guaranteeing assembly accuracy.

[0064] The lengths of the first positioning post 22a and the second positioning post 22b in the first direction can be different, as can their diameters. The relative positions of the multiple first positioning posts 22a and the multiple second positioning posts 22b can also be different, matching the dimensions of the positioning structures on the corresponding assembly. Based on this, the lengths of the different first support rods 11 of the main support 1 can also be different.

[0065] In the description of this specification, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0066] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A positioning fixture for positioning an assembly, characterized in that, The positioning fixture includes: Main support frame (1); Positioning component (2), the positioning component (2) includes a base (21) and a positioning post (22), the positioning post (22) is mounted on the main support (1) through the base (21), and one end of the positioning post (22) extends in a first direction away from the main support (1); The base (21) includes a first mounting part (211) and a second mounting part (212), and the positioning post (22) is connected to the second mounting part (212). The first mounting part (211) is movably connected to the main support (1) and can move along a second direction, which is perpendicular to the first direction. The second mounting part (212) is movably connected to the first mounting part (211) and can move along a third direction, which is perpendicular to both the first direction and the second direction.

2. The positioning fixture according to claim 1, characterized in that, The main support (1) includes a first support rod (11) extending along the second direction, and the first mounting part (211) is configured as a cylindrical structure, and the first mounting part (211) is sleeved on the first support rod (11).

3. The positioning fixture according to claim 2, characterized in that, The first mounting part (211) has a first end (211a) and a second end (211b) opposite to each other. The first end (211a) has an opening, and the second end (211b) is closed. The first mounting part (211) is at least partially fitted onto the end of the first support rod (11) through the opening. The end face of the first support rod (11) is provided with a first screw hole (111) extending in a second direction. The positioning fixture further includes a first threaded component (3), one end of which is connected to the second end (211b) and the other end is fitted into the first threaded hole (111).

4. The positioning fixture according to claim 3, characterized in that, The portion of the first mounting portion (211) near the first end (211a) includes a plurality of connecting portions (2111) spaced circumferentially along the first mounting portion (211), and the connecting portions (2111) extend axially along the first mounting portion (211), with the ends of the plurality of connecting portions (2111) away from the second end (211b) forming the opening.

5. The positioning fixture according to any one of claims 2 to 4, characterized in that, The first support rod (11) has a guide groove (112) extending in the second direction on its surface, and the first mounting part (211) has a guide part (2112) that is at least partially accommodated in the guide groove (112).

6. The positioning fixture according to any one of claims 1 to 4, characterized in that, The positioning fixture also includes a second threaded component (4), which extends along the third direction, and the first mounting part (211) and the second mounting part (212) are connected by the second threaded component (4); Wherein, the first mounting part (211) is provided with a second screw hole (2113) on the surface near the second mounting part (212), one end of the second threaded part (4) is connected to the second mounting part (212), and the other end is fitted into the second screw hole (2113); A first gasket (5) is provided between the first mounting part (211) and the second mounting part (212), and the first gasket (5) abuts against the first mounting part (211) and the second mounting part (212) respectively.

7. The positioning fixture according to any one of claims 1 to 4, characterized in that, The second mounting part (212) has a third screw hole (2121) on its surface. The positioning post (22) includes a threaded section (221), which partially fits into the third screw hole (2121). The threaded section (221) is fitted with a nut (6) on the part exposed in the third threaded hole (2121), and a second washer (7) is provided between the nut (6) and the surface of the second mounting part (212).

8. The positioning fixture according to any one of claims 1 to 4, characterized in that, The positioning component (2) includes a plurality of bases (21) and a plurality of positioning posts (22), with each of the bases (21) and the positioning posts (22) corresponding to one another, and each of the positioning posts (22) being used to engage with process holes at different positions on the assembly.

9. The positioning fixture according to any one of claims 1 to 4, characterized in that, The positioning component (2) includes a plurality of bases (21) and a plurality of positioning posts (22) that correspond one-to-one. The plurality of positioning posts (22) includes a portion of first positioning posts (22a) and the remaining portion of second positioning posts (22b). The assembly includes a first assembly (8) and a second assembly (9) for mutual assembly. The first positioning post (22a) is used to position the first assembly (8), and the second positioning post (22b) is used to position the second assembly (9).

10. The positioning fixture according to any one of claims 1 to 4, characterized in that, The main support (1) includes a plurality of first support rods (11) and a plurality of second support rods (12). The first support rods (11) extend along a second direction. The first mounting part (211) is connected to the first support rods (11). The plurality of first support rods (11) are distributed at intervals along a third direction. Two adjacent first support rods (11) are connected by the second support rods (12).

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