A tool clamp for processing a subway wheel elastic wheel core
By designing an adjustable tooling fixture, the problems of high cost and low efficiency of existing special equipment were solved, enabling efficient and precise processing of inclined holes at different angles on ordinary equipment, thus meeting the multi-model and multi-angle processing needs of subway wheel cores.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 段中红
- Filing Date
- 2025-08-15
- Publication Date
- 2026-07-24
AI Technical Summary
Existing specialized equipment for machining oblique holes in subway wheel cores is costly, inefficient, and cannot meet the general machining needs of different angles, resulting in long production cycles and slow market response.
A tooling fixture comprising an angle rotary disk, a bracket, a top plate, a base, and a cover plate was designed. Angle adjustment and rigid fixation are achieved through bolted connections. It is suitable for ordinary processing equipment, covers an angle range of -55° to 55°, and is adaptable to the processing of oblique holes at different angles.
It reduced equipment purchase costs, improved processing efficiency, shortened production cycles, ensured processing accuracy and versatility, and met the processing needs of multiple models and angles.
Smart Images
Figure CN224543849U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of subway wheel processing equipment, specifically to a tooling fixture for processing the elastic wheel core of a subway wheel, which is particularly suitable for processing and fixing oblique holes of different angles on the elastic wheel core. Background Technology
[0002] In the manufacturing process of flexible wheels for subway trains, the wheel core, as a core component, directly affects the safety and comfort of train operation due to its structural precision. Among these processes, the machining of oblique holes on the wheel core, especially those at specific angles such as 35°, is a critical step, requiring extremely high angular and positional accuracy.
[0003] In the current technology, enterprises mostly rely on imported specialized processing equipment to complete this process, with the purchase cost of a single piece of equipment reaching as high as 12 million yuan, and maintenance costs are also expensive. At the same time, these specialized equipment have limited functions and can only be adapted to the processing of specific wheel core models. When the product model is updated or the angle of the inclined hole is adjusted, it is necessary to purchase or modify the equipment again, further increasing production costs.
[0004] Furthermore, the processing efficiency of specialized equipment is low, with a single wheel core processing cycle of up to 40 minutes, making it difficult to meet the needs of large-scale production. This leads to extended product delivery cycles and restricts the company's market responsiveness. Therefore, developing a low-cost, versatile, and efficient wheel core processing tooling fixture has become an urgent need in the industry.
[0005] In conclusion, it is evident that a new type of tooling fixture for machining the elastic wheel core of subway wheels urgently needs to be developed. Utility Model Content
[0006] To address the problems of high cost, low efficiency, and long cycle time in processing inclined holes of elastic wheel cores using existing specialized equipment, and its inability to meet the general processing requirements of inclined holes at different angles, this utility model provides a tooling fixture for processing elastic wheel cores of subway wheels.
[0007] To achieve the above objectives, the following technical solution is provided: A tooling fixture for processing the elastic wheel core of a subway wheel includes an angle rotating disk, a bracket, a top plate, a base, and a cover plate connected by bolts. The angle rotating disk includes a connecting platform, a turntable body, and a rotating part from top to bottom. Two sets of top plate connecting holes are opened on the surface of the connecting platform. The top plate connecting holes penetrate the connecting platform and are inserted into the inside of the turntable body. The turntable body is provided with a turntable fixing hole in the middle for observing the front and rear sides of the turntable body. The rotating part has a fan-shaped structure, and an arc-shaped adjusting strip penetrating the center of the rotating part is provided.
[0008] Preferably, a bolt head placement area is provided around the periphery where the edge of the arc-shaped adjusting strip meets the rotating part.
[0009] Preferably, the arc-shaped adjustment bar extends at a 55-degree angle to both sides with the center line as the zero point.
[0010] Preferably, the bracket and the angle rotating disk are connected together by bolts through the rotating disk connection hole one and the rotating disk connection hole two in the middle, and the arc-shaped adjustment strip and the rotating disk fixing hole of the angle rotating disk.
[0011] Preferably, the turntable body can rotate around the central axis point with the turntable fixing hole, and is fixed to the bracket by connecting bolts and arc-shaped adjusting strips.
[0012] Preferably, the bottom of the bracket is provided with a mounting hole for connection with the base, and the mounting hole is connected and fixed to the connection part on one side of the base by bolts.
[0013] Preferably, a wheel core insertion platform is provided above the top plate, and two sets of top plate fixing holes are provided on the wheel core insertion platform corresponding to the connection holes of the wheel core and the top plate. A cover plate connection hole is provided between the top plate fixing holes, and the cover plate connection hole is detachably connected to the cover plate by an insertion bolt located at the center of the cover plate.
[0014] Preferably, the bottom center of the rotating part is a horizontal structure.
[0015] Preferably, the bottom of the top plate is provided with a recess for the matching of the connecting platforms.
[0016] Compared with the prior art, the present invention has the following beneficial effects: Reduced costs: No special equipment is required; the wheel core inclined hole can be machined on a regular machining center or drilling machine, saving a lot of the cost of purchasing special equipment. Improve efficiency: Simplify processing procedures, shorten production cycles, and accelerate delivery. High versatility: The angle rotary table can be adjusted within the range of -55° to 55° to meet the processing needs of oblique holes with different angles between 0° and 55°; Stable structure: Multiple bolt connections and matching structures ensure that the wheel core is firmly fixed during processing, guaranteeing processing accuracy. Attached Figure Description
[0017] Figure 1 Schematic diagram of the overall structure of the angle rotary disk for machining the elastic wheel core of subway wheels Figure 1 ; Figure 2 Schematic diagram of the overall structure of the angle rotating disk Figure 2 ; Figure 3 This is a top view of the angle rotating disk. Figure 4A schematic diagram of the support structure for a tooling fixture used for machining the elastic wheel core of a subway car. Figure 5 A schematic diagram of the top plate structure of a tooling fixture for machining the elastic wheel core of a subway car; Figure 6 A schematic diagram of the cover plate structure for a tooling fixture used for machining the elastic wheel core of a subway car; Figure 7 A schematic diagram of the base plate structure of a tooling fixture for machining the elastic wheel core of a subway car; in: 1. Connecting platform; 2. Turntable body; 3. Rotating part; 4. Arc-shaped adjusting strip; 5. Horizontal structure; 6. Bolt head placement area; 7. Turntable fixing hole; 8. Top plate connecting hole; 9. Connecting part; 10. Bracket; 11. Mounting hole; 12. Turntable connecting hole one; 13. Turntable connecting hole two; 14. Top plate; 15. Wheel core insertion platform; 16. Recessed part; 17. Top plate fixing hole; 18. Cover plate connecting hole; 19. Cover plate; 20. Insertion bolt; 21. Base. Detailed Implementation
[0018] The technical solution of this utility model will be clearly and completely described below with reference to specific embodiments. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.
[0019] In the description of this utility model, it should be noted that the terms center, up, down, left, right, vertical, horizontal, inner, and outer, indicating the orientation or positional relationship, are merely for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms first, second, and third are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0020] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms installation, connection, and linking should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0021] like Figure 1-7As shown, the tooling fixture includes an angle rotary disk, a bracket 10, a top plate 14, a base 21, and a cover plate 19 connected by bolts. The structure and connection relationship of each component are as follows: The angle rotary disk, from top to bottom, includes a connecting platform 1, a rotary disk body 2, and a rotating part 3. Two sets of top plate connection holes 8 are opened on the surface of the connecting platform 1. The top plate connection holes 8 penetrate the connecting platform 1 and are inserted into the inner side of the turntable body 2 for connection and fixation with the top plate 14. A turntable fixing hole 7 is provided in the middle of the turntable body 2, which allows observation of the front and rear sides of the turntable body 2 and serves as the central axis point for angular rotation. The rotating part 3 has a fan-shaped structure, with a horizontal structure 5 at the bottom center and an arc-shaped adjustment strip 4 that runs through the rotating part 3 in the center. The arc-shaped adjustment bar 4 extends 55° to both sides with the center line as the zero point, that is, the angle adjustment range is -55° to 55°, which can adapt to the processing requirements of oblique holes with different angles; A bolt head placement area 6 is provided around the edge of the arc-shaped adjusting strip 4 where it meets the rotating part 3. This area is used to accommodate the head of the fixing bolt and prevent the bolt from protruding and affecting the structural stability.
[0022] The bracket 10 has a turntable connection hole 12 and a turntable connection hole 13 in the middle. The bracket is connected to the arc-shaped adjustment strip 4 of the angle rotating disk and the turntable fixing hole 7 by bolts passing through the above holes, so that the two are fixed together.
[0023] The turntable body 2 can rotate around the turntable fixing hole 7 as the central axis. It can be fixed to the bracket 10 after the angle is adjusted by connecting bolts and cooperating with the arc-shaped adjustment strip 4.
[0024] The bracket 10 has a mounting hole 11 at the bottom. The connecting part 9 on one side of the base 21 is connected to the mounting hole 11 by bolts to fix the bracket 10 and the base 21. The base 21 provides stable support for the entire fixture.
[0025] A wheel core insertion platform 15 is provided above the top plate 14 for placing the wheel core to be processed; two sets of top plate fixing holes 17 are provided on the wheel core insertion platform 15, which correspond to the top plate connecting holes 8 of the connecting platform 1, and the top plate 14 is fixed to the angle rotating disk by bolts. A cover plate connecting hole 18 is provided between the top plate fixing holes 17. The insertion bolt 20 in the center of the cover plate 19 passes through the cover plate connecting hole 18, so that the cover plate 19 and the top plate 14 can be detachably connected to press the wheel core and prevent it from loosening during processing. The bottom of the top plate 14 is provided with a recessed part 16, which matches the connecting platform 1 to ensure the accuracy and stability of the connection between the two.
[0026] The working principle of this utility model of a tooling fixture for machining the elastic wheel core of a subway wheel is as follows: This invention utilizes an angle-adjustable mechanical structure design to achieve precise fixing and multi-angle processing of the elastic wheel core on ordinary processing equipment. Its core principle is as follows: Angle conversion mechanism: By utilizing the cooperation of the fan-shaped rotating part 3 of the angle rotary disk and the arc-shaped adjusting strip 4, with the fixed hole 7 of the rotary disk as the rotation axis, the angle of the inclined hole to be processed on the wheel core is converted into the rotation angle on the horizontal plane, so that the central axis of the inclined hole is kept parallel to the spindle of the processing equipment, such as a drilling machine or machining center, thereby completing the inclined hole processing using ordinary equipment.
[0027] Rigid fixing system: The base 21 provides stable support, the bracket 10 is bolted to the angle rotating disk to achieve angle locking, and the top plate 14 and the cover plate 19 cooperate to press the wheel core, forming a rigid structural chain of "support-rotation-fixing" to ensure no displacement deviation during processing.
[0028] Universal adaptability design: The ±55° adjustment range of the arc-shaped adjustment bar 4 covers the common angle requirements of oblique holes, and the wheel core insertion platform 15 of the top plate 14 is compatible with wheel cores of different sizes, realizing the universality of processing multiple models and angles.
[0029] Example 1: 35° oblique hole machining adapted for type A wheel core Applicable scenario: Machining a 35° oblique hole with a diameter of 800mm for the core of a Type A elastic subway wheel, with a hole depth of 20mm and a hole diameter of 12mm.
[0030] Operating steps: 1. Assembly fixture: Fix the base 21 on the drilling machine worktable, and connect the bracket 10 and the angle rotary disk in sequence, ensuring that each bolt is pre-tightened but not completely locked; 2. Install the wheel core: Place the type A wheel core on the wheel core insertion platform 15 of the top plate 14 and tighten it by the insertion bolts 20 of the cover plate 19. The positioning reference surface of the wheel core is in contact with the top plate 14. 3. Angle adjustment: Loosen the connecting bolts between the angle rotating disk and the bracket 10, and rotate the rotating part 3 clockwise by 35° along the arc-shaped adjusting strip 4 with the rotating disk fixing hole 7 as the axis, and position it by the scale on the edge of the adjusting strip; 4. Locking and fixing: Tighten the bolts at point 4 of the arc-shaped adjusting strip to make the angle rotating disk rigidly connected to the bracket 10. At this time, the central axis of the 35° inclined hole of the wheel core is parallel to the spindle of the drilling machine. 5. Machining operation: Start the drilling machine and complete the inclined hole machining according to the preset parameters. During the machining process, the fixture does not vibrate significantly, greatly reducing the hole position deviation.
[0031] Example 2: -15° oblique hole machining adapted for type B wheel core Applicable scenarios: Metro Type B flexible wheel core, machining of a -15° inclined hole with a diameter of 650mm, a hole depth of 15mm, and a hole diameter of 10mm.
[0032] Operating steps: Step 1, Fixture Adjustment: Keep the base 21 and bracket 10 fixed, replace the top plate 14 with the one that fits the B-type wheel core, and precisely align it with the connecting platform 1 through the recess 16. Step 2: Place the B-type wheel core on the wheel core insertion platform 15, and press the wheel core with the cover plate 19 through the cover plate connection hole 18 to ensure that the radial positioning error of the wheel core is ≤0.1mm; Step 3: Loosen the fixing bolts of the angle rotating disk, and rotate the rotating part 3 counterclockwise by 15° along the arc-shaped adjusting strip 4 with the rotating disk fixing hole 7 as the axis, so that the bolt head is embedded in the bolt head placement area 6; Step 4: Tighten the bolts at turntable connection hole 12 and turntable connection hole 23 in sequence. After checking that the angle turntable is not loose, start the machining center. Step 5: After machining, the deviation of the oblique hole angle is ≤0.5°, and the surface roughness is Ra3.2, which meets the design requirements. The single-piece machining cycle is shortened to 15 minutes.
[0033] Both embodiments verify the versatility and precision of this invention in machining wheel cores of different angles and models, enabling efficient production without the need for special equipment and significantly reducing processing costs.
[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A tooling fixture for machining the elastic wheel core of a subway wheel, characterized in that, The device includes an angle rotating disk, a bracket (10), a top plate (14), a base (21), and a cover plate (19) connected by bolts. The angle rotating disk includes a connecting platform (1), a turntable body (2), and a rotating part (3) from top to bottom. Two sets of top plate connecting holes (8) are opened on the surface of the connecting platform (1). The top plate connecting holes (8) penetrate the connecting platform (1) and are inserted into the inside of the turntable body (2). The turntable body (2) is provided with a turntable fixing hole (7) in the middle to observe the front and rear sides of the turntable body (2). The rotating part (3) has a fan-shaped structure. An arc-shaped adjusting strip (4) is provided in the center of the rotating part (3) through the rotating part (3).
2. The tooling fixture for machining the elastic wheel core of a subway wheel according to claim 1, characterized in that, A bolt head placement area (6) is provided around the junction of the edge of the arc-shaped adjustment bar (4) and the rotating part (3).
3. The tooling fixture for machining the elastic wheel core of a subway wheel according to claim 1, characterized in that, The arc-shaped adjustment bar (4) extends 55 degrees to both sides with the center line as the zero point.
4. The tooling fixture for machining the elastic wheel core of a subway wheel according to claim 1, characterized in that, The bracket (10) and the angle rotating disk are connected together by bolts through the rotating disk connection hole one (12) and rotating disk connection hole two (13) in the middle, the arc-shaped adjustment strip (4) of the angle rotating disk, and the rotating disk fixing hole (7).
5. A tooling fixture for machining the elastic wheel core of a subway wheel according to claim 4, characterized in that, The turntable body (2) can rotate around the turntable fixing hole (7) as the central axis and is fixed by connecting bolts and arc-shaped adjusting strip (4) to the bracket (10).
6. The tooling fixture for machining the elastic wheel core of a subway wheel according to claim 1, characterized in that, The bracket (10) has a mounting hole (11) at the bottom that connects to the base (21). The mounting hole (11) and the connecting part (9) on one side of the base (21) are connected and fixed by bolts.
7. The tooling fixture for machining the elastic wheel core of a subway wheel according to claim 1, characterized in that, A wheel core insertion platform (15) is provided above the top plate (14). Two sets of top plate fixing holes (17) corresponding to the wheel core and the top plate connection hole (8) are provided on the wheel core insertion platform (15). A cover plate connection hole (18) is provided between the top plate fixing holes (17). The cover plate connection hole (18) is detachably connected to the cover plate (19) by a bolt (20) at the center of the cover plate (19).
8. A tooling fixture for machining the elastic wheel core of a subway wheel according to claim 1, characterized in that, The bottom middle position of the rotating part (3) is a horizontal structure (5).
9. A tooling fixture for machining the elastic wheel core of a subway wheel according to claim 7, characterized in that, The bottom of the top plate (14) is provided with a recess (16) for matching the connecting platform (1).