Frame positioning mounting structure

Abstract

The utility model relates to auxiliary frock field provides a kind of framework positioning installation structure. Framework positioning installation structure includes at least two pedestal main body;Ladder cylinder, ladder cylinder is arranged in the upper end of pedestal main body, the upper end of ladder cylinder is equipped with ladder groove, ladder groove includes the vertical positioning surface for the radial positioning of spring seat, and the horizontal support surface for the axial positioning of spring seat, ladder cylinder is also provided with threaded hole, threaded hole is used to cooperate with chucking bolt, to be fixed on the horizontal support surface with spring seat by pressing tightly. The framework positioning installation structure does not need complicated steps, compared with traditional one-face two-pin positioning mode, chucking time is greatly shortened;After processing is completed, only need to loosen chucking bolt to take down framework, do not need to disassemble pedestal main body;The modular design of ladder cylinder and pedestal main body, if ladder groove wears or threaded hole is damaged, only need to replace ladder cylinder, do not need to scrap entire pedestal, reduce maintenance cost and downtime.

Description

Technical Field

[0001] This utility model relates to the field of auxiliary tooling and provides a frame positioning and installation structure. Background Technology

[0002] In urban rail vehicle bogies, the bogie frame mostly adopts an H-type structure, connected to the wheelset axle box by a series of rubber springs, ensuring the stability and safety of the vehicle during operation. However, the current manufacturing process of this bogie frame has many problems, including cumbersome process flow, long manufacturing cycle, high precision requirements for spring seats, and difficulty in cleaning iron filings. These problems seriously affect production efficiency and product quality.

[0003] To address these issues, the frame typically needs to be in a reference positioning state during the fabrication process, usually employing a "one-face, two-pin" positioning method. Existing methods include: first, milling a flat surface on the clamping and positioning device to form a "one-face," and then milling the outer cylinder to form "two pins." However, this method cannot meet the clamping and positioning requirements of an integrally formed spring seat plate. Another method is to mill a positioning groove on the positioning device, so that the frustum of the frame spring mounting seat and the positioning groove of the positioning device form a "one-face, two-pin" configuration, and then using a pressure plate assembly to press the protruding part on the outer side of the spring seat. However, this method is prone to frame deformation, and the pressing and releasing process is relatively cumbersome. Utility Model Content

[0004] This utility model provides a frame positioning and installation structure to solve the defects of low processing efficiency and cumbersome processing procedures in related technologies.

[0005] This utility model embodiment provides a frame positioning and installation structure, including: At least two base bodies; A stepped cylinder is disposed at the upper end of the base body. The upper end of the stepped cylinder is provided with a stepped groove. The stepped groove includes a vertical positioning surface for radial positioning of the spring seat and a horizontal support surface for axial positioning of the spring seat. The stepped cylinder is also provided with a threaded hole for cooperating with a clamping bolt to press and fix the spring seat on the horizontal support surface.

[0006] According to one embodiment of the present invention, a base plate is connected to the bottom of the base body, and the base plate is used to fix the base body to the workbench.

[0007] According to one embodiment of the present invention, a U-shaped groove for inserting anchor bolts is provided on the base plate.

[0008] According to one embodiment of the present invention, an elongated groove is provided on the workbench along the length direction and / or along the width direction of the workbench, and the anchor bolt is adapted to pass through the U-shaped groove and the elongated groove to install the base body onto the workbench.

[0009] According to one embodiment of the present invention, in a plane parallel to the base plate, the projected area of ​​the base body is greater than or equal to the projected area of ​​the stepped tube.

[0010] According to one embodiment of the present utility model, the stepped cylinder and the base body are separate structures, and the stepped cylinder and the base body are connected by welding or bolts; or, The stepped cylinder and the base body are integrally formed.

[0011] According to one embodiment of the present invention, the stepped cylinder has a plurality of threaded holes evenly distributed along its circumference.

[0012] According to one embodiment of the present invention, the threaded hole is a blind hole formed on the upper end face of the stepped cylinder.

[0013] According to one embodiment of the present invention, the number of base bodies is four, and the four base bodies are arranged in a one-to-one correspondence with the four spring seats of the frame.

[0014] According to one embodiment of the present invention, the base body is a metal base body.

[0015] According to the frame positioning and installation structure provided in this utility model embodiment, the vertical positioning surface and horizontal support surface of the stepped groove respectively achieve radial and axial positioning of the spring seat. By replacing the traditional point / line positioning method with surface contact, the positioning gap is greatly reduced, preventing the spring seat from rotating in the horizontal direction or moving in the vertical direction, ensuring the accuracy of the overall reference position of the frame, and solving the problem of machining dimensional deviation caused by gaps in traditional positioning methods. The circumferentially evenly arranged threaded holes and clamping bolts can apply uniform clamping force to the spring seat from multiple directions, avoiding local deformation of the spring seat or frame caused by unilateral force on the traditional pressure plate assembly. It is especially suitable for frame structures with one-piece molded spring seat plates, ensuring the structural integrity and accuracy of the frame after processing. The spring seat only needs to be aligned with the stepped groove to complete the initial positioning, without cumbersome steps. Compared with the traditional one-sided two-pin positioning method, the clamping time is greatly shortened, which is especially suitable for mass production scenarios. After processing, the frame can be removed simply by loosening the clamping bolts, without disassembling the base body. The modular design of the stepped cylinder and the base body means that if the stepped groove is worn or the threaded hole is damaged, only the stepped cylinder needs to be replaced, without scrapping the entire base, thus reducing maintenance costs and downtime. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is a schematic perspective view of the frame positioning and installation structure provided by this utility model in use.

[0018] Figure 2 This is a schematic enlarged view of the frame positioning and installation structure and the frame provided by this utility model.

[0019] Figure 3 This is a schematic perspective view of the workbench and base body and the stepped cylinder provided by this utility model.

[0020] Figure 4 This is a schematic perspective view of the stepped tube provided by this utility model.

[0021] Figure 5 This is a schematic cross-sectional view of the stepped tube provided by this utility model.

[0022] Figure label: 100. Base body; 102. Stepped cylinder; 104. Stepped groove; 106. Vertical positioning surface; 108. Horizontal support surface; 110. Threaded hole; 112. Base plate; 114. Worktable; 116. U-shaped groove; 118. Long groove. Detailed Implementation

[0023] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0024] like Figures 1 to 5 As shown, this utility model embodiment provides a frame positioning and installation structure, including: At least two base bodies, 100; A stepped cylinder 102 is disposed at the upper end of the base body 100. The upper end of the stepped cylinder 102 is provided with a stepped groove 104. The stepped groove 104 includes a vertical positioning surface 106 for radial positioning of the spring seat and a horizontal support surface 108 for axial positioning of the spring seat. A threaded hole 110 is also provided on the stepped cylinder 102. The threaded hole 110 is used to cooperate with the clamping bolt to press and fix the spring seat on the horizontal support surface 108.

[0025] According to the frame positioning and installation structure provided in this embodiment of the utility model, the vertical positioning surface 106 and the horizontal support surface 108 of the stepped groove 104 respectively achieve radial and axial positioning of the spring seat. By replacing the traditional point / line positioning method with surface contact, the positioning gap is greatly reduced, preventing the spring seat from rotating in the horizontal direction or moving in the vertical direction, ensuring the accuracy of the overall reference position of the frame, and solving the problem of machining dimension deviation caused by gaps in traditional positioning methods. The circumferentially evenly arranged threaded holes 110 and clamping bolts can apply uniform clamping force to the spring seat from multiple directions, avoiding local deformation of the spring seat or frame caused by unilateral force on the traditional pressure plate assembly. It is especially suitable for frame structures with integrally formed spring seat plates, ensuring the structural integrity and accuracy of the frame after processing. The spring seat only needs to be aligned with the stepped groove 104 to complete the initial positioning, without cumbersome steps. Compared with the traditional one-sided two-pin positioning method, the clamping time is greatly shortened, which is especially suitable for mass production scenarios. After processing, the frame can be removed simply by loosening the clamping bolts, without disassembling the base body 100. The modular design of the stepped cylinder 102 and the base body 100 means that if the stepped groove 104 is worn or the threaded hole 110 is damaged, only the stepped cylinder 102 needs to be replaced, without scrapping the entire base, thus reducing maintenance costs and downtime.

[0026] Please continue reading Figures 1 to 5 The frame positioning and installation structure provided in this embodiment of the utility model addresses the precise positioning requirements during the processing of the bogie frame of urban rail vehicles. Through the setting of the base, the stepped groove 104 and the bolts, the frame spring seat is reliably fixed.

[0027] Specifically, the base body 100 is a rigid support component, with at least two components. It is made of high-strength metal and has an overall columnar or block-shaped structure. The bottom can be fixed to the worktable 114 via the base plate 112. The base body 100 has sufficient load-bearing strength to withstand the external forces during the frame and processing, preventing deformation from affecting the positioning accuracy. Its upper surface is flat and is used to stably install the stepped cylinder 102, ensuring that the relative position of the stepped cylinder 102 and the base body 100 is fixed.

[0028] The stepped cylinder 102 is fixed to the upper end of the base body 100, coaxially or precisely aligned with the base body 100. Its material is the same as the base body 100, and it can be fixed through integral molding, welding, or bolt connection. The upper surface of the stepped cylinder 102 is machined with a stepped groove 104, which consists of a vertical positioning surface 106 and a horizontal support surface 108. The vertical positioning surface 106 is the inner wall of the stepped groove 104, with a ring-shaped or columnar structure, tightly fitting the outer wall of the frame spring seat. It limits the horizontal movement of the spring seat through radial limiting, ensuring accurate radial positioning. The horizontal support surface 108 is the bottom surface of the stepped groove 104, with a ring-shaped planar structure, fitting the lower end surface of the spring seat. It supports the weight of the spring seat and the frame through axial support, ensuring the stability of the spring seat in the vertical direction.

[0029] Multiple threaded holes 110 are evenly distributed around the stepped groove 104 on the stepped cylinder 102. The threaded holes 110 penetrate the upper wall thickness of the stepped cylinder 102 and have complete internal threads machined on the inner wall to match the clamping bolts. After the clamping bolts are screwed into the threaded holes 110, their tails extend into the stepped groove 104. When the spring seat is placed in the stepped groove 104 and fits against the vertical positioning surface 106 and the horizontal support surface 108, the clamping bolts are tightened. The tails of the bolts can directly press against the top surface of the spring seat or indirectly press against the spring seat through the pressure block, firmly locking the spring seat onto the horizontal support surface 108 and preventing the spring seat from shifting during processing.

[0030] The general usage process of the frame positioning and installation structure provided in this embodiment of the utility model is as follows: Pre-assembly of the structure: Fix the stepped cylinder 102 to the upper end of the base body 100, ensuring that the vertical positioning surface 106 of the stepped groove 104 is flat and without deviation from the horizontal support surface 108; according to the number of frame spring seats, fix at least two base bodies 100 to the workbench 114 at a preset interval. Frame positioning: Lift the frame and align the spring seat at the bottom of the frame with the stepped groove 104 of the base body 100. Slowly lower the frame until the outer wall of the spring seat is in contact with the vertical positioning surface 106 and the lower end surface is in contact with the horizontal support surface 108, thus completing the initial positioning. Tightening and fixing: Screw the clamping bolts into the threaded holes 110 of the stepped cylinder 102, tighten the bolts one by one, so that the tail of the bolt presses against the top surface of the spring seat, ensuring that the spring seat and the stepped groove 104 fit tightly without looseness or gaps. Machining and disassembly: After the frame is positioned and fixed, milling, drilling and other machining processes are carried out; after machining is completed, the clamping bolts are loosened and the frame is lifted to complete disassembly.

[0031] According to one embodiment of the present invention, a base plate 112 is connected to the bottom of the base body 100, and the base plate 112 is used to fix the base body 100 to the workbench 114.

[0032] In one embodiment of this utility model, the base plate 112 is a rectangular metal plate, made of the same material as the base body 100. It is rigidly connected to the bottom of the base body 100 by full welding or high-strength bolts, and the connection parts are ground or treated to prevent loosening. The area of ​​the base plate 112 is larger than the bottom area of ​​the base body 100, and its edges extend beyond the circumference of the base body 100, forming a support margin. The workbench 114 is a workshop-specific processing platform with a flat surface and sufficient load-bearing strength. The base plate 112 is fixed to the workbench 114 by anchor bolts—the anchor bolts pass through the pre-set mounting holes of the base plate 112 and are tightened in conjunction with the threaded holes 110 of the workbench 114, so that the base body 100 is stably fixed to the workbench 114 by the base plate 112, preventing the base body 100 from shifting during frame processing.

[0033] The base plate 112 increases the contact area between the base body 100 and the worktable 114, distributing the weight of the base body 100 and the frame, preventing the base body 100 from sinking into the worktable 114 due to excessive local stress, or from shifting its position due to vibration, thus ensuring positioning accuracy during frame processing. The base plate 112 can be adjusted to fit base bodies 100 and worktables 114 of different specifications without requiring additional modifications to the base body 100 or worktable 114, reducing equipment integration difficulty and facilitating the disassembly and replacement of the base body 100. The base plate 112 isolates the base body 100 from direct contact with the worktable 114, preventing sharp edges or protrusions on the bottom of the base body 100 from scratching the surface of the worktable 114, reducing maintenance costs and extending the service life of the worktable 114.

[0034] According to one embodiment of the present invention, a U-shaped groove 116 for inserting anchor bolts is provided on the base plate 112.

[0035] In one embodiment of this utility model, a U-shaped groove 116 is formed in the edge area of ​​the base plate 112, extending along the length or width of the base plate 112, with the groove opening facing the outside of the base plate 112, facilitating the horizontal insertion of the anchor bolt from the groove opening. The width of the U-shaped groove 116 is adapted to the outer diameter of the anchor bolt, and the groove wall is smoothed to prevent the bolt from getting stuck when inserted; the bottom of the groove has an arc-shaped structure, fitting snugly against the bolt head or washer, ensuring that the bolt is evenly stressed when tightened. At least two U-shaped grooves 116 are evenly formed on each base plate 112. After the anchor bolt passes through the U-shaped groove 116, it connects to the workbench 114. Before tightening, the position of the base plate 112 can be finely adjusted along the U-shaped groove 116 to ensure accurate relative positioning between the multiple base bodies 100.

[0036] The U-shaped groove 116 allows the base plate 112 to move slightly in the groove direction before the anchor bolts are tightened, facilitating the adjustment of the lateral or longitudinal position of the base body 100. This ensures that multiple base bodies 100 can be precisely aligned with the spring seat mounting positions of the frame, avoiding inaccurate positioning caused by deviations in the position of the threaded holes 110 of the worktable 114. Anchor bolts can be inserted laterally through the opening of the U-shaped groove 116 without fully lifting the base plate 112 to align with the threaded holes 110 of the worktable 114. This is particularly suitable for the installation of heavy-duty base bodies 100, allowing a single person to complete the position adjustment and fixing, reducing labor intensity. The U-shaped groove 116 is compatible with threaded holes 110 of the worktable 114 with different spacings, eliminating the need to customize the base plate 112 for a specific worktable 114, improving the versatility of the base plate 112 and reducing tooling customization costs.

[0037] According to one embodiment of the present invention, a long groove 118 is provided on the workbench 114 along the length direction and / or along the width direction of the workbench 114, and the anchor bolts are adapted to pass through the U-shaped groove 116 and the long groove 118 to install the base body 100 on the workbench 114.

[0038] In one embodiment of this utility model, the elongated groove 118 on the workbench 114 is a through rectangular groove that extends along the length or width of the workbench 114. The groove width is adapted to the outer diameter of the anchor bolts, and the bottom of the groove is flattened. The U-shaped groove 116 of the base plate 112 and the elongated groove 118 of the workbench 114 are arranged intersectingly. After the anchor bolts pass through the U-shaped groove 116 of the base plate 112 and the elongated groove 118 of the workbench 114 in sequence, they are tightened and fixed by nuts and washers. Before tightening, the base body 100 can be finely adjusted bidirectionally along the direction of the elongated groove 118 and the direction of the U-shaped groove 116 until the stepped grooves 104 of the multiple base bodies 100 are precisely aligned with the spring seat position of the frame. After adjustment, the nuts are tightened to lock.

[0039] The cross-fitting of the elongated slot 118 and the U-shaped slot 116 enables bidirectional fine-tuning of the base body 100 within the plane of the worktable 114. This adapts to the spring seat spacing requirements of different sized frames without requiring replacement of the worktable 114 or the base body 100, significantly improving the versatility of the tooling. The bidirectional fine-tuning function allows operators to precisely calibrate the relative positions of multiple base bodies 100, ensuring that the four spring seats of the frame can be simultaneously and smoothly placed into the corresponding stepped slots 104. This avoids frame tilting or installation difficulties caused by base position deviations, improving machining accuracy. The elongated slot 118 design eliminates the need for numerous dispersed threaded holes 110 on the worktable 114; only a few elongated slots 118 are required to meet the installation needs of different base positions, reducing the machining difficulty and maintenance costs of the worktable 114.

[0040] According to one embodiment of the present invention, in a plane parallel to the base plate 112, the projected area of ​​the base body 100 is greater than or equal to the projected area of ​​the stepped cylinder 102.

[0041] In one embodiment of this utility model, the base body 100 is a cylindrical or prismatic structure, and the stepped cylinder 102 is a cylindrical component coaxially disposed at the upper end of the base body 100, with their axes coinciding. In a horizontal plane parallel to the base plate 112, the cross-sectional area of ​​the base body 100 is larger than that of the stepped cylinder 102, meaning the base body 100 has a stable structure that is wider at the bottom and narrower at the top. The outer diameter of the stepped cylinder 102 is smaller than that of the base body 100, and the connection between the two is achieved through a transition fillet or flange structure to enhance structural rigidity. When the spring seat of the frame is placed in the stepped groove 104 of the stepped cylinder 102, the weight of the spring seat is transmitted to the base body 100 through the stepped cylinder 102, and then distributed by the base body 100 to the base plate 112 and the worktable 114.

[0042] The aforementioned projected area design lowers the center of gravity of the base body 100, making it less prone to tipping over when supporting the stepped cylinder 102 and the frame. Especially during frame fabrication under external forces, it effectively resists overturning moments, ensuring overall structural stability. The larger projected area of ​​the base body 100 evenly distributes the load transmitted by the stepped cylinder 102 to the base plate 112, preventing deformation of the base body 100 due to localized stress concentration, extending its service life, and reducing pressure damage to the base plate 112 and the worktable 114. The larger projected area of ​​the base body 100 allows for compatibility with stepped cylinders 102 of different specifications, enabling the adaptation of spring seats of different sizes without replacing the base body 100, thus improving tooling flexibility.

[0043] According to one embodiment of the present utility model, the stepped cylinder 102 and the base body 100 are separate structures, and the stepped cylinder 102 and the base body 100 are connected by welding or bolts. or, The stepped cylinder 102 and the base body 100 are integrally formed structures.

[0044] In one embodiment of this utility model, when the stepped cylinder 102 and the base body 100 adopt a split structure: Both the stepped cylinder 102 and the base body 100 are made of metal. The bottom of the stepped cylinder 102 is provided with a flange, and the top of the base body 100 is provided with a corresponding flange face. The two are connected by bolts evenly arranged around the circumference, and a sealing gasket is sandwiched between the flange faces; or they are connected by full welding, with the weld seam surrounding the joint between the stepped cylinder 102 and the base body 100. After welding, flaw detection is performed to ensure that there are no defects.

[0045] When the stepped cylinder 102 and the base body 100 adopt an integral molding structure: The stepped cylinder 102 and the base body 100 are processed into a single component by casting or forging. After forming, key parts such as the stepped groove 104 and threaded hole 110 of the stepped cylinder 102 are machined to ensure dimensional accuracy and avoid assembly errors caused by separate connection.

[0046] By adopting a separate structure for the stepped cylinder 102 and the base body 100, it is easy to replace the stepped cylinder 102 individually, reducing maintenance costs. At the same time, different specifications of the stepped cylinder 102 can be replaced according to the size of the spring seat, improving the versatility of the base body 100. Alternatively, by adopting an integrated structure for the stepped cylinder 102 and the base body 100, there are no connection gaps or assembly errors, resulting in stronger overall rigidity and the ability to withstand greater loads and external impacts. This avoids bolt loosening or weld cracking caused by vibration in separate connections, making it particularly suitable for high-precision, heavy-load frame processing scenarios. Both structures can be selected according to the actual application scenario, enhancing the applicability of the tooling.

[0047] According to one embodiment of the present invention, a plurality of threaded holes 110 are evenly distributed along the circumference of the stepped cylinder 102.

[0048] In one embodiment of this utility model, threaded holes 110 are formed on the upper end face of the stepped cylinder 102, evenly distributed around the axis of the stepped cylinder 102, with a quantity of at least three. The axis of the threaded holes 110 is perpendicular to the upper end face of the stepped cylinder 102, and the hole depth penetrates the upper end wall thickness of the stepped cylinder 102 without penetrating the side wall of the stepped cylinder 102. The clamping bolt mates with the threaded holes 110. The bolt head is a hexagonal head or an internal hexagonal head, and the tail extends into the stepped groove 104 after passing through the threaded hole 110. When the spring seat is placed into the stepped groove 104, the clamping bolt is tightened. The tail of the bolt can directly press against the top surface of the spring seat, or indirectly press against the spring seat through a pressure block.

[0049] The circumferentially distributed threaded holes 110 allow the clamping bolts to apply clamping force to the spring seat from multiple directions, preventing deformation of the spring seat due to excessive force on one side. This ensures a tight fit between the spring seat and the vertical positioning surface 106 and horizontal support surface 108 of the stepped groove 104, improving positioning accuracy. The coordinated clamping of multiple bolts prevents the spring seat from rotating or shifting during machining due to vibration or cutting forces, making it particularly suitable for high-precision machining processes such as milling and drilling of frames, ensuring machining quality. The symmetrically positioned threaded holes 110 allow operators to tighten the bolts sequentially without repeatedly adjusting the force balance, shortening clamping time and improving work efficiency.

[0050] According to one embodiment of the present invention, the threaded hole 110 is a blind hole formed on the upper end face of the stepped cylinder 102.

[0051] In one embodiment of this utility model, a blind-hole threaded hole 110 is formed on the upper end face of the stepped cylinder 102. The bottom of the hole is a closed structure and does not penetrate the side wall or bottom of the stepped cylinder 102. The hole depth is designed according to the length of the clamping bolt. The inner wall of the threaded hole 110 is machined with a complete internal thread, which precisely matches the external thread of the clamping bolt. The hole opening is chamfered to facilitate the bolt being screwed in smoothly. There is no through channel in the blind hole. It is formed by deep hole drilling or milling during machining. The bottom of the hole is smoothed to avoid thread damage caused by the bolt tail colliding with the bottom of the hole.

[0052] The closed structure of the blind hole prevents impurities such as iron filings and coolant generated during frame machining from entering the threaded hole 110, avoiding bolt jamming or thread damage caused by impurity accumulation, reducing the frequency of cleaning and maintenance of the threaded hole 110, and extending its service life. The blind hole does not penetrate the side wall of the stepped cylinder 102, maintaining the overall rigidity of the stepped cylinder 102 and preventing a decrease in strength due to a through hole. Especially when tightening bolts, it effectively resists the axial force of the bolts, preventing cracking of the stepped cylinder 102. The blind hole limits the maximum screw-in depth of the bolts, preventing excessive screwing that could cause the tail of the bolt to pierce the stepped cylinder 102 or damage the internal structure. It also prevents bolts from falling out of the hole and being lost after loosening, improving operational safety.

[0053] According to one embodiment of the present invention, there are four base bodies 100, and the four base bodies 100 are arranged in a one-to-one correspondence with the four spring seats of the frame.

[0054] In one embodiment of this utility model, four base bodies 100 are respectively arranged in the four corner areas of the workbench 114, forming a rectangular distribution, and their spacing is perfectly matched with the spacing of the four spring seats at the bottom of the frame. The stepped grooves 104 of each base body 100 are of the same size, ensuring that the four spring seats can be placed into the corresponding stepped grooves 104 at the same time to achieve synchronous positioning. During installation, the position of each base body 100 is finely adjusted by the long groove 118 of the workbench 114 and the U-shaped groove 116 of the base plate 112, so that the center line connecting the four stepped grooves 104 coincides with the installation center line connecting the frame spring seats. After adjustment, the base body 100 is fixed, and then the four spring seats of the frame are placed into the stepped grooves 104 one by one and tightened by clamping bolts.

[0055] The four base bodies 100 correspond one-to-one with the four spring seats, forming a four-point positioning system. This effectively restricts the translation and rotation of the frame in the horizontal plane, ensuring a stable reference position during frame processing and preventing frame tilting or offset due to insufficient positioning points, thus improving processing accuracy. The four base bodies 100 evenly bear the weight of the frame, preventing local deformation caused by single or two-point stress, making it particularly suitable for processing heavy-duty frames and ensuring the structural integrity of the frame. The four-point correspondence configuration conforms to the spring seat layout of most urban rail vehicle bogie frames, eliminating the need to redesign the number and layout of base bodies 100 for different frames, thus improving the standardization and versatility of the tooling.

[0056] According to one embodiment of the present invention, the base body 100 is a metal base body.

[0057] In one embodiment of this utility model, both the base body 100 and the stepped cylinder 102 are made of high-strength metal materials, such as ductile iron or 45# carbon steel. During manufacturing, a blank is first formed by casting or forging, followed by rough machining and finish machining to ensure the dimensional accuracy and surface roughness of key parts. After machining, the base body 100 undergoes surface treatment, such as blackening, galvanizing, or spraying with anti-rust paint, to enhance its corrosion resistance and adapt to harsh environments such as humid and dusty workshops.

[0058] The metal material possesses sufficient strength and rigidity to bear the weight of the frame and external forces during processing, preventing deformation or damage to the base body 100 and ensuring stable positioning accuracy over long-term use. The wear resistance of metal is superior to non-metallic materials such as plastic or wood. The positioning surface of the stepped groove 104 is less prone to wear during long-term contact and friction with the spring seat, and the threaded hole 110 is less likely to slip during repeated clamping of the bolts, extending the service life of the base body 100 and reducing replacement frequency. The metal material can withstand temperature changes during workshop processing without dimensional deformation or performance degradation due to temperature variations, ensuring stable positioning performance under different working conditions.

[0059] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A frame positioning and installation structure, characterized in that, include: At least two base bodies (100); A stepped cylinder (102) is disposed at the upper end of the base body (100). The upper end of the stepped cylinder (102) is provided with a stepped groove (104). The stepped groove (104) includes a vertical positioning surface (106) for radial positioning of the spring seat and a horizontal support surface (108) for axial positioning of the spring seat. The stepped cylinder (102) is also provided with a threaded hole (110). The threaded hole (110) is used to cooperate with a clamping bolt to press and fix the spring seat on the horizontal support surface (108).

2. The frame positioning and installation structure according to claim 1, characterized in that, The base body (100) is connected to a base plate (112) at its bottom, and the base plate (112) is used to fix the base body (100) to the workbench (114).

3. The frame positioning and installation structure according to claim 2, characterized in that, The base plate (112) has a U-shaped groove (116) for inserting anchor bolts.

4. The frame positioning and installation structure according to claim 3, characterized in that, Along the length direction of the workbench (114) and / or along the width direction of the workbench (114), a long groove (118) is provided on the workbench (114), and the anchor bolt is adapted to pass through the U-shaped groove (116) and the long groove (118) to install the base body (100) on the workbench (114).

5. The frame positioning and installation structure according to claim 2, characterized in that, In a plane parallel to the base plate (112), the projected area of ​​the base body (100) is greater than or equal to the projected area of ​​the stepped cylinder (102).

6. The frame positioning and installation structure according to any one of claims 1 to 5, characterized in that, The stepped cylinder (102) and the base body (100) are separate structures, and the stepped cylinder (102) and the base body (100) are connected by welding or bolts; or, The stepped cylinder (102) and the base body (100) are integrally formed structures.

7. The frame positioning and installation structure according to any one of claims 1 to 5, characterized in that, The stepped cylinder (102) has a plurality of threaded holes (110) evenly distributed along its circumference.

8. The frame positioning and installation structure according to any one of claims 1 to 5, characterized in that, The threaded hole (110) is a blind hole opened on the upper end face of the stepped cylinder (102).

9. The frame positioning and installation structure according to any one of claims 1 to 5, characterized in that, The number of the base body (100) is four, and the four base bodies (100) are arranged in a one-to-one correspondence with the four spring seats of the frame.

10. The frame positioning and installation structure according to any one of claims 1 to 5, characterized in that, The base body (100) is a metal base body.

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