Automobile flywheel machining clamping device

Abstract

This utility model provides a clamping device for machining automotive flywheels, belonging to the field of clamping tooling technology, and solves the problem of how to maintain a fixed clamping of flywheel gears during their transfer through various machining stations. It includes a fixed base, a support base, and circumferential and axial limiting mechanisms. The support base is located above the fixed base and is fixed integrally with the mandrel, with the support base lower than the top of the mandrel. The circumferential limiting mechanism includes a lifting plate, a first telescopic power source, and a limiting post. The lifting plate is located between the fixed base and the support base and slides with the mandrel. The first telescopic power source is located between the fixed base and the lifting plate for adjusting the height of the lifting plate. The limiting post is located on the top surface of the lifting plate, and the support base has holes corresponding to the positions of the limiting posts. The axial limiting mechanism is located at the top inside the mandrel and has an axial limiting state that expands radially beyond the cross-sectional area of ​​the mandrel. It has the technical effect of using the shaft hole as a positioning and clamping reference, ensuring stable clamping and uniform positioning.

Description

Technical Field

[0001] This utility model relates to the field of clamping tooling technology, specifically to a clamping device for processing automobile flywheels. Background Technology

[0002] Traditional flywheel machining relies primarily on external contours or end face datums for positioning. These fixtures typically consist of mechanical jaws combined with hydraulic or pneumatic systems. During transitions between turning, milling, and grinding processes, operators must repeatedly adjust the workpiece position and change specialized fixtures, leading to frequent changes in the positioning datum. While existing fixtures can achieve stable clamping in a single operation, they struggle to guarantee datum consistency across multiple operations. This is particularly problematic for flywheel gears with precise tooth profile requirements, where the positional tolerances between the shaft hole and the tooth surface are easily compromised during repeated clamping. This fragmented positioning method not only increases auxiliary time but also restricts the overall machining accuracy of the flywheel assembly.

[0003] The core problem with the current technology is that the flywheel gear lacks a unified fixed clamping datum during its flow through various machining stations, making it difficult to guarantee repeatability and positioning accuracy. Workpiece realignment is required during process changes, which reduces production efficiency and causes machining errors to accumulate along the process chain, ultimately affecting the dynamic balance performance of the flywheel and crankshaft assembly. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model proposes an automotive flywheel machining clamping device to solve the technical problem of how to keep flywheel gears fixedly clamped during their transfer at various machining stations.

[0005] The technical solution adopted in this utility model is: an automobile flywheel machining clamping device, comprising: Fixed base, support base, circumferential limiting mechanism and axial limiting mechanism; A mandrel is vertically fixed on the fixed base, and a support base is located above the fixed base and fixed integrally with the mandrel. The support base is lower than the top of the mandrel. The circumferential limiting mechanism includes a lifting plate, a first telescopic power source, and a limiting post. The lifting plate is located between the fixed base and the support base and can slide relative to the spindle. The first telescopic power source is disposed between the fixed base and the lifting plate for adjusting the height of the lifting plate. The limiting post is disposed on the top surface of the lifting plate. The support base is provided with a hole corresponding to the position of the limiting post. The length of the limiting post is greater than the thickness of the support base. The axial limiting mechanism is located at the top of the mandrel and has an axial limiting state that expands radially beyond the mandrel cross-section.

[0006] Optionally, the axial limiting mechanism includes a second telescopic power source, a sliding block, and an elastic element; the top of the mandrel is provided with a transverse through-groove, the sliding blocks are respectively slidably disposed at both ends of the transverse through-groove, and the elastic element is connected between the inner side of the sliding block and the middle of the mandrel. Initially, the elastic element pulls the sliding block back into the transverse through-groove; the second telescopic power source is disposed inside the mandrel, and a trapezoidal pressing block is disposed at the end of the telescopic shaft. The two sides of the trapezoidal pressing block are respectively in sliding contact with the two sliding blocks. When the trapezoidal pressing block presses the sliding block, the sliding block can move outward of the transverse through-groove.

[0007] Optionally, the outer side of the sliding block is provided with a notch, the shape of which matches the limiting post.

[0008] Optionally, the top of the mandrel is provided with a vertically penetrating pressing groove, and the trapezoidal pressing block is slidably disposed in the pressing groove, the width of the pressing groove being smaller than the width of the sliding pressing block.

[0009] Optionally, a support column facing the second telescopic power source shaft is provided in the middle of the transverse groove, and the elastic element is provided at the tail of the support column and the sliding pressure block.

[0010] Optionally, the top surface of the support base is provided with a circumferential array of protruding support points.

[0011] Optionally, the support point is a ball located on the support base, and the spherical surface of the ball slides in conjunction with the mounting pit of the support base.

[0012] Optionally, the system also includes a movable base, to which the fixed base is detachably fixed, and the movable base cooperates with the transfer mechanism of the production line.

[0013] Optionally, a lifting ring is provided at the top of the mandrel, spanning the clamping groove.

[0014] Optionally, the lifting ring is arc-shaped and made of metal, and its two ends are respectively welded to both sides of the clamping groove.

[0015] As can be seen from the above technical solution, the beneficial technical effects of this utility model are as follows: It can solve the technical problem of how to position and clamp flywheel gears during the process of station transfer in the existing technology. By using rigid positioning and clamping based on the hole shaft reference, it not only solves the problem of positioning repeatability during station transfer, but also avoids the cumulative error caused by traditional step-by-step clamping, thereby significantly improving the dimensional consistency and quality of flywheel machining. Attached Figure Description

[0016] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0017] Figure 1 This is a schematic diagram of the entire device, including the flywheel.

[0018] Figure 2 This is a cross-sectional schematic diagram of the entire device, including the flywheel.

[0019] Figure 3 This is a schematic diagram of the overall device.

[0020] Figure 4 This is a cross-sectional schematic diagram of the entire device.

[0021] Figure 5 for Figure 4 Schematic diagram of section AA.

[0022] Figure 6 This is a disassembly diagram of the sliding pressure block and the trapezoidal extrusion block.

[0023] Reference numerals in the attached drawings: fixed base 1, spindle 11, transverse slide groove 111, pressing slide groove 112, support column 113, lifting ring 12, support seat 2, support point 21, circumferential limiting mechanism 3, lifting plate 31, first telescopic power source 32, limiting column 33, axial limiting mechanism 4, second telescopic power source 41, sliding pressure block 42, notch 421, elastic element 43, trapezoidal extrusion block 44, movable base 5. Detailed Implementation

[0024] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0025] It should be noted that, unless otherwise stated, the technical or scientific terms used in this application shall have the ordinary meaning as understood by one of ordinary skill in the art to which this utility model pertains.

[0026] For automotive flywheel machining clamping equipment, please refer to the appendix. Figures 1-4 One possible implementation method is as follows: Fixed base 1, support base 2, circumferential limiting mechanism 3 and axial limiting mechanism 4; A spindle 11 is vertically fixed on the fixed base 1. A support base 2 is located above the fixed base 1 and is fixed to the spindle 11 as a whole. The support base 2 is lower than the top of the spindle 11 to form a boss. When the flywheel is placed in, the shaft hole of the flywheel is engaged with the spindle 11, and the bottom surface of the flywheel is supported by the top surface of the support base 2. The circumferential limiting mechanism 3 includes a lifting plate 31, a first telescopic power source 32, and a limiting post 33. The lifting plate 31 is located between the fixed base 1 and the support base 2 and can slide relative to the spindle 11. The first telescopic power source 32 is set between the fixed base 1 and the lifting plate 31 to adjust the height of the lifting plate 31. The limiting post 33 is set on the top surface of the lifting plate 31. The support base 2 is provided with a hole corresponding to the position of the limiting post 33. The length of the limiting post 33 is greater than the thickness of the support base 2. The outer circumference of the flywheel shaft hole is provided with circumferentially distributed holes. When the first telescopic power source 32 moves upward to lift the lifting plate 31, the lifting plate 31 moves upward to drive the limiting post 33 to pass through the support base 2 and insert into the hole on the outer circumference of the flywheel shaft hole, thereby limiting the rotation of the flywheel. The axial limiting mechanism 4 is located at the top of the spindle 11 and has an axial limiting state that expands radially beyond the cross-sectional area of ​​the spindle 11, thereby pressing the top of the flywheel and limiting the axial movement of the flywheel.

[0027] In the above embodiments, radial positioning is achieved through the cooperation between the mandrel and the flywheel shaft hole, and the top surface of the support base provides an axial reference surface, ensuring the consistency of the workpiece reference across different processes. The circumferential limiting mechanism uses a liftable limiting post inserted into the flywheel process hole to effectively limit circumferential displacement and rotation during processing. The axial limiting mechanism forms a rigid clamping system by radially expanding and pressing the top end face of the flywheel. This structure realizes integrated clamping of multiple processes with the shaft hole (which is also the mounting hole during operation) as the sole reference, eliminating the reference conversion error in traditional clamping methods, significantly improving the relative positional accuracy of the flywheel tooth profile and the shaft hole, and reducing the time for repeated alignment.

[0028] In one possible implementation, see Appendix Figure 3 and Figure 4 The axial limiting mechanism 4 includes a second telescopic power source 41, a sliding block 42, and an elastic element 43. The top of the spindle 11 is provided with a transverse through groove 111. The sliding blocks 42 are slidably disposed at both ends of the transverse groove 111. The elastic element 43 is connected between the inner side of the sliding blocks 42 and the middle of the spindle 11. Initially, the elastic element 43 pulls the sliding blocks 42 back into the transverse groove 111. The second telescopic power source 41 is disposed inside the spindle 11, and a trapezoidal pressing block 44 is provided at the end of the telescopic shaft. The two waists of the trapezoidal pressing block 44 are in sliding contact with the two sliding blocks 42 respectively. When the trapezoidal pressing block 44 presses the sliding blocks 42, the sliding blocks 42 can move along the outside of the transverse groove 111.

[0029] In the above embodiment, the axial limiting mechanism drives the trapezoidal pressing block to move up and down through a built-in second telescopic power source. Its inclined surface converts the vertical thrust into radial displacement of the sliding pressing block, achieving synchronous and symmetrical radial expansion. An elastic element ensures that the pressing block automatically resets and disengages from the workpiece when the power source is withdrawn. This design applies locking force to the top surface of the flywheel, ensuring the clamping effect of both ends of the flywheel.

[0030] Furthermore, a notch 421 is provided on the outer side of the sliding block 42. The shape of the notch 421 matches that of the limiting post 33. When the sliding block 42 moves outward, the notch 421 can engage with the limiting post 33 to position the flywheel at an angle. For example, if six limiting posts 33 are evenly distributed around the circumference, with a 60-degree interval between adjacent limiting posts 33, the angle of the flywheel on the clamping device can be positioned and accurately adjusted at 60-degree intervals. In the above embodiment, the notch on the outer side of the sliding block forms a precise mechanical interlock with the limiting post of the circumferential limiting mechanism, making the locking structure more stable and combining the axial clamping and circumferential positioning actions into one.

[0031] In one possible implementation, see Appendix Figure 6 The top of the mandrel 11 is provided with a vertically penetrating pressing groove 112. The trapezoidal pressing block 44 is slidably disposed in the pressing groove 112. The width of the pressing groove 112 is smaller than the width of the sliding pressing block 42, thereby limiting and guiding the sliding pressing block 42.

[0032] In one possible implementation, see Appendix Figure 5 ( Figure 4 (See top view of AA plan). A support column 113 is provided in the middle of the transverse slide 111, which faces the shaft of the second telescopic power source 41. The elastic element 43 is provided at the tail of the support column 113 and the sliding pressure block 42.

[0033] In one possible implementation, see Appendix Figure 6 The top surface of the support base 2 has a circumferential array of protruding support points 21. Each support point 21 is a rolling ball located on the support base 2, with the spherical surface of the ball slidingly engaging with the mounting recess of the support base 2. This design transforms traditional large-area planar contact into discrete spherical point contact, significantly reducing the contact area and frictional resistance between the flywheel bottom surface and the support base. When placing a workpiece, the flywheel can easily rotate within a small range, facilitating the quick and accurate alignment and insertion of the circumferential limiting post into the flywheel process hole, significantly reducing the difficulty and time required for workpiece adjustment. This low-friction support method not only effectively protects the flywheel's precision machining reference surface from scratches but also provides the necessary conditions for rapid and precise angle pre-positioning of the flywheel, further improving the efficiency of the entire clamping process.

[0034] In one possible implementation, see Appendix Figure 1 It also includes a movable base 5, and a fixed base 1 that can be detachably fixed to the movable base 5. The movable base 5 cooperates with the transfer mechanism of the production line. For example, the movable base 5 can be placed on the conveyor line to facilitate automated and batch flywheel transfer.

[0035] In one possible implementation, see Appendix Figure 3 A lifting ring 12 is provided at the top of the mandrel 11, spanning the clamping groove 112, to facilitate the overall lifting and transportation of the flywheel and clamping device during production. The lifting ring 12 is arc-shaped and made of metal, with its two ends welded to both sides of the clamping groove 112.

[0036] 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 or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model, and they should all be covered within the scope of the claims and specification of this utility model.

Claims

1. A machining and clamping device for automobile flywheels, characterized in that, include: Fixed base (1), support base (2), circumferential limiting mechanism (3) and axial limiting mechanism (4); A spindle (11) is vertically fixed on the fixed base (1), and a support (2) is located above the fixed base (1) and fixed together with the spindle (11). The support (2) is lower than the top of the spindle (11). The circumferential limiting mechanism (3) includes a lifting plate (31), a first telescopic power source (32), and a limiting post (33). The lifting plate (31) is located between the fixed base (1) and the support base (2) and can slide relative to the spindle (11). The first telescopic power source (32) is disposed between the fixed base (1) and the lifting plate (31) for adjusting the height position of the lifting plate (31). The limiting post (33) is disposed on the top surface of the lifting plate (31). The support base (2) is provided with a hole corresponding to the position of the limiting post (33). The length of the limiting post (33) is greater than the thickness of the support base (2). The axial limiting mechanism (4) is located at the top inside the mandrel (11) and has an axial limiting state that expands radially beyond the cross-sectional area of ​​the mandrel (11).

2. The automobile flywheel machining clamping device as described in claim 1, characterized in that: The axial limiting mechanism (4) includes a second telescopic power source (41), a sliding pressure block (42), and an elastic element (43); The top of the mandrel (11) is provided with a transverse sliding groove (111) that runs through it. The sliding blocks (42) are slidably disposed at both ends of the transverse sliding groove (111). The elastic element (43) is connected between the inner side of the sliding block (42) and the middle part of the mandrel (11). Initially, the elastic element (43) pulls the sliding block (42) back into the transverse sliding groove (111). The second telescopic power source (41) is located inside the spindle (11), and a trapezoidal extrusion block (44) is provided at the end of the telescopic shaft. The two waists of the trapezoidal extrusion block (44) are in sliding contact with the two sliding blocks (42) respectively. When the trapezoidal extrusion block (44) extrudes the sliding block (42), the sliding block (42) can move along the outside of the transverse groove (111).

3. The automobile flywheel machining clamping device as described in claim 2, characterized in that: The sliding block (42) has a notch (421) on its outer side, and the shape of the notch (421) matches the limiting post (33).

4. The automobile flywheel machining clamping device as described in claim 2, characterized in that: The top of the mandrel (11) is provided with a vertically penetrating pressing groove (112), and the trapezoidal pressing block (44) is slidably disposed in the pressing groove (112). The width of the pressing groove (112) is smaller than the width of the sliding pressing block (42).

5. The automobile flywheel machining clamping device as described in claim 4, characterized in that: The transverse slide groove (111) is provided with a support column (113) facing the shaft of the second telescopic power source (41) in the middle, and the elastic element (43) is provided at the tail of the support column (113) and the sliding pressure block (42).

6. The automobile flywheel machining clamping device as described in claim 1, characterized in that: The top surface of the support base (2) is provided with protruding support points (21) arranged in a circumferential array.

7. The automobile flywheel machining clamping device as described in claim 6, characterized in that: The support point (21) is a ball located on the support base (2), and the spherical surface of the ball slides in conjunction with the mounting pit of the support base (2).

8. The automobile flywheel machining clamping device as described in claim 1, characterized in that: It also includes a movable base (5), and the fixed base (1) is detachably fixed to the movable base (5), and the movable base (5) cooperates with the transfer mechanism of the production line.

9. The automobile flywheel machining clamping device as described in claim 4, characterized in that: A lifting ring (12) is provided at the top of the mandrel (11) across the clamping groove (112).

10. The automobile flywheel machining clamping device as described in claim 9, characterized in that: The lifting ring (12) is arc-shaped and made of metal, and the two ends of the lifting ring (12) are respectively welded to both sides of the pressing groove (112).

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