An internal and external two-way fixing device for hub processing

Abstract

The present invention relates to the technical field of hub processing equipment, and specifically relates to an internal and external two-way fixing device for hub processing, including: an external fixing disc, an external clamping slider, a transmission rod, a connecting column, an induction elastic block, a profiling clamping jaw, an internal fixing gear, an internal fixing mechanism, an internal fixing rod, a transmission gear, a cam clamping block, a sleeving hole, a plate-shaped protrusion, a differential spring, a limit stop block; through the design of the differential spring and its related structures in the sleeving hole, the internal fixing mechanism first positions the hub workpiece, and then the external fixing mechanism completes the clamping and fixing of the hub workpiece, thereby achieving the technical effect of ensuring the accurate position of the hub during the processing process and avoiding processing errors caused by inaccurate positioning, improving the fixing efficiency and processing accuracy of the machine tool for the hub workpiece.

Description

Technical Field

[0001] The invention relates to the technical field of wheel hub processing equipment, in particular to an internal and external bidirectional fixing device for wheel hub processing. Background Art

[0002] As an important part of modern industry, the automotive industry is undergoing unprecedented changes. With the continuous advancement of technology and the increasing diversification of consumer demand, automakers are constantly optimizing various components of the car to meet market demand while pursuing higher performance, lower energy consumption, and a smarter driving experience. In this process, the wheel hub, as one of the key components of the car, its quality and design directly affect the tire's grip, the vehicle's steering response, and driving stability. In recent years, with the rapid increase in the market share of new energy vehicles, the importance of the wheel hub has been further enhanced. The motor torque and speed of new energy vehicles are large, which puts higher requirements on the strength and durability of the wheel hub.

[0003] The production process of automobile wheels involves multiple steps. First, the appropriate material, such as aluminum alloy or steel, is selected and the rough wheel blank is formed by gravity casting or low-pressure casting. After casting, rough machining is required to remove excess material, and then the wheel is placed on a milling machine, lathe or other processing machine for precision machining to meet the size and shape requirements of the wheel. After the fine machining, the wheel is sent to the heat treatment workshop for processing and strict quality inspection to ensure that each wheel meets the standards. Finally, surface treatment, such as painting or anodizing, is used to improve the corrosion resistance and appearance of the wheel.

[0004] During the production and processing of the above-mentioned wheel hub, in the precision processing stage, companies often use the external positioning method to fix the rough wheel hub on the machine tool to perform precision processing such as milling of the wheel hub spokes. However, the external positioning method usually requires the installation of multiple identical fixing mechanisms on the fixed platform of the machine tool, and then these fixing mechanisms are abutted against the outer ring of the wheel hub one by one to achieve the clamping and fixing of the wheel hub. On the one hand, this fixing method is time-consuming and adds to the workload of the staff. On the other hand, the outer surface of the wheel hub has inherent unevenness due to defects such as uneven casting, pores or rough surface, which causes the fixture to rely on the outer surface of the wheel hub for alignment. The external fixing mechanism may cause movement during the finishing process, resulting in defects in the finished product and increasing the possibility of scrapping and rework. In mass production, these problems may be exacerbated, leading to higher scrap rates and increased manufacturing costs.

[0005] In view of this, in order to overcome the above technical problems, the present invention proposes an internal and external bidirectional fixing device for wheel hub processing. Summary of the invention

[0006] In order to make up for the deficiencies of the prior art, the technical solution adopted by the present invention to solve its technical problems is as follows: A two-way internal and external fixing device for hub processing according to the present invention includes a fixed platform, and the fixed platform is used to place hub workpieces to be processed and treated;

[0007] It further includes: The fixed platform is evenly provided with T-shaped grooves extending from the edge to the center. An external fixing mechanism is installed below the fixed platform, and the external fixing mechanism includes:

[0008] An external fixing disk, the external fixing disk is located directly below the fixed platform and is rotatably connected to the fixed platform;

[0009] A power assembly, the power assembly is used to drive the external fixing disk to perform periodic reciprocating rotation at a fixed angle;

[0010] An external clamping slider, the "I"-shaped external clamping slider is slidably connected in the T-shaped groove;

[0011] A transmission rod, the outer edge of the external fixing disk is evenly fixedly connected with connecting columns identical to those below the external clamping slider. The transmission rod is sleeved on the connecting columns of the external fixing disk and the external clamping slider and is rotatably connected to the two connecting columns.

[0012] Preferably, a number of induction elastic blocks are evenly and elastically installed circumferentially at the placement position of the outer ring of the hub workpiece on the upper end of the fixed platform. A driving switch of the power assembly is installed in the installation groove below the induction elastic block.

[0013] Preferably, the T-shaped groove extends towards the center of the fixed platform to the position of the induction elastic block, and towards the edge of the fixed platform, it penetrates through the entire edge of the fixed platform.

[0014] Preferably, a profiling jaw is detachably installed above the external clamping slider, and the side of the profiling jaw close to the hub workpiece is a concave curved surface with the same shape as the outer ring of the hub workpiece.

[0015] Preferably, an internal fixing gear is also installed between the external fixing disk and the fixed platform. The internal fixing gear is fixedly connected to the external fixing disk. An internal fixing mechanism is also evenly installed on the fixed platform inside the placement position of the hub workpiece. The internal fixing mechanism fixes the hub workpiece from the inside under the driving action of the internal fixing gear.

[0016] Preferably, the internal fixing mechanism includes:

[0017] An internal fixing rod, the internal fixing rod penetrates through the fixed platform and is rotatably connected to the fixed platform;

[0018] A transmission gear, the transmission gear is fixedly connected to the lower end of the internal fixing rod, and the transmission gear meshes with the internal fixing gear;

[0019] The cam clamping block is sleeved on the part of the upper end of the inner fixing rod that extends out of the fixed platform. During the rotation of the outer edge of the cam clamping block along with the inner fixing rod, it abuts against the inner ring of the hub workpiece.

[0020] Preferably, the fixing position of the outer clamping slider on the outer ring of the hub workpiece is not collinear with the fixing position of the cam clamping block on the inner ring of the hub workpiece.

[0021] Preferably, the sum of the major axis of the elliptical cam clamping block and the shortest distance from its side to the center of the fixed platform is greater than the radius length of the inner ring of the hub workpiece.

[0022] Preferably, a plate-shaped protrusion extends inward from the sleeve hole of the cam clamping block and the inner fixing rod. The part of the inner fixing rod located in the sleeve hole also extends outward with the same plate-shaped protrusion. A differential spring is fixedly connected between the two plate-shaped protrusions of the cam clamping block and the inner fixing rod at the sleeve hole.

[0023] Preferably, a limit stop block is fixedly connected to the side of the plate-shaped protrusion of the inner fixing rod in the sleeve hole along the rotation direction of the inner fixing rod. The differential springs installed on both sides of the limit stop block are hard springs with a stiffness coefficient of more than 500 N / m.

[0024] The beneficial effects of the present invention are as follows:

[0025] 1. When the outer fixed disk rotates, it will drive a plurality of uniformly distributed outer clamping sliders to act simultaneously. This uniformly distributed design enables the clamping force to act evenly on the hub workpiece, effectively reducing vibration and offset during the machining process, thereby improving the machining accuracy. The T-shaped groove design not only provides a stable sliding path for the outer clamping slider but also enhances the structural strength of the fixed platform, ensuring that it will not deform or be damaged during the clamping process and guaranteeing the long-term stable operation of the equipment.

[0026] 2. Through the design of the differential spring and its related structures in the sleeve hole, the inner fixing mechanism first locates the hub workpiece, and then the outer fixing mechanism completes the clamping and fixing of the hub workpiece, thereby achieving the technical effect of ensuring the accurate position of the hub during the machining process and avoiding machining errors caused by inaccurate positioning, improving the fixing efficiency and machining accuracy of the machine tool for the hub workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The present invention will be further described below with reference to the accompanying drawings.

[0028] Figure 1 is the overall structural schematic diagram of the present invention;

[0029] Figure 2 is the overall structural schematic diagram of the present invention from the bottom perspective;

[0030] Figure 3It is a sectional view of the three-dimensional structure of the present invention;

[0031] Figure 4 It is a schematic three-dimensional structure diagram of the outer clamping slider of the present invention;

[0032] Figure 5 It is a partial top view of the inner fixing mechanism and its related structures of the present invention.

[0033] In the figure: 1, fixed platform; 2, T-shaped groove; 3, outer fixing mechanism; 4, outer fixing disc; 5, power assembly; 6, outer clamping slider; 7, transmission rod; 8, connecting column; 9, induction spring block; 10, profiling clamping jaw; 11, inner fixing gear; 12, inner fixing mechanism; 13, inner fixing rod; 14, transmission gear; 15, cam clamping block; 16, sleeved hole; 17, plate-shaped protrusion; 18, differential spring; 19, limit stop block. Specific embodiments

[0034] In order to make the technical means, creative features, achieved purposes and effects of the present invention easy to understand, the present invention will be further described below in conjunction with the accompanying drawings of the specification and specific embodiments.

[0035] As Figures 1 to 5 shown, an inner and outer bidirectional fixing device for hub machining provided by an embodiment of the present invention includes a fixed platform 1, and the fixed platform 1 is used to place the hub workpiece to be machined.

[0036] It further includes: the fixed platform 1 is uniformly provided with T-shaped grooves 2 extending from the edge to the center, and an outer fixing mechanism 3 is installed below the fixed platform 1. The outer fixing mechanism 3 includes:

[0037] An outer fixing disc 4, which is located directly below the fixed platform 1 and is rotatably connected to the fixed platform 1;

[0038] A power assembly 5, which is used to drive the outer fixing disc 4 to perform periodic reciprocating rotation at a fixed angle;

[0039] An outer clamping slider 6, and the "I"-shaped outer clamping slider 6 is slidably connected in the T-shaped groove 2;

[0040] A transmission rod 7, the outer edge of the outer fixing disc 4 is uniformly fixedly connected with connecting columns 8 identical to those below the outer clamping slider 6, and the transmission rod 7 is sleeved on the connecting columns 8 connecting the outer fixing disc 4 and the outer clamping slider 6 and is rotatably connected to the two connecting columns 8.

[0041] As an embodiment of the present invention, a plurality of induction spring blocks 9 are circumferentially and elastically installed at the placement position of the outer circle of the hub workpiece on the upper end of the fixed platform 1, and a drive switch of the power assembly 5 is installed in the installation groove below the induction spring block 9.

[0042] As an implementation manner of the present invention, the T-shaped groove 2 extends towards the center of the fixed platform 1 to the induction elastic block 9, and penetrates through the entire edge of the fixed platform 1 towards the edge of the fixed platform 1.

[0043] When the hub workpiece is placed on the fixed platform 1, its weight presses the induction elastic blocks 9 elastically mounted on the platform to move downward. These induction elastic blocks 9 are designed to be able to deform slightly, so as to precisely trigger the switch of the power component 5 below. Once the switch is triggered, the outer fixed disk 4 driven by the power component 5 starts to rotate, thereby driving the transmission rod 7 connected thereto through the connecting column 8 to move together. Finally, the outer clamping slider 6 with the connecting column 8 also installed at the bottom slides smoothly along the T-shaped groove 2 towards the middle of the fixed platform 1, applying a uniform clamping force to the outer ring of the hub workpiece, so as to clamp and fix it; the outer clamping slider 6 is in an "I" shape and matches the T-shaped groove 2 to ensure that it will not loosen or shift during the sliding process; it should be noted that when the outer fixed disk 4 rotates, it will drive a plurality of outer clamping sliders 6 evenly distributed to act simultaneously. This evenly distributed design enables the clamping force to act evenly on the hub workpiece, effectively reducing vibration and offset during the processing, thereby improving the processing accuracy; the design of the T-shaped groove 2 not only provides a stable sliding path for the outer clamping slider 6, but also enhances the structural strength of the fixed platform 1, so that it will not deform or be damaged during the clamping process, ensuring the long-term stable operation of the equipment; even if the outer clamping slider 6 needs to be replaced due to long-term clamping and fixing work, the outwardly penetrating T-shaped groove 2 makes the replacement process simpler and more convenient; the entire fixing process is highly automated, and the precise triggering mechanism of the induction elastic block 9 ensures that the fixing program will only be started when the workpiece is correctly placed, avoiding the risk of misoperation; the power component 5 can be accurately controlled by a servo motor or the like to ensure the stability and repeated accuracy of the rotation of the outer fixed disk 4, and further improve the processing quality.

[0044] As an implementation manner of the present invention, a profiling jaw 10 is detachably installed above the outer clamping slider 6, and the side of the profiling jaw 10 close to the hub workpiece is a concave curved surface having the same shape as the outer ring of the hub workpiece.

[0045] During operation, the concave curved surface on the side of the profiling jaw 10 detachably installed above the outer clamping slider 6 close to the hub workpiece is closely attached to the outer ring of the hub, further enhancing the fixing effect and preventing the hub from shifting or vibrating during the processing; the detachable characteristic of the profiling jaw 10 enables easy replacement according to the shapes of different hubs, improving the versatility and flexibility of the device; in addition, this design not only improves the fixing accuracy and reduces the processing error, but also facilitates maintenance and replacement, reducing the use cost.

[0046] As an embodiment of the present invention, an internal fixing gear 11 is further installed between the outer fixing disk 4 and the fixed platform 1. The internal fixing gear 11 is fixedly connected to the outer fixing disk 4. The fixed platform 1 is also evenly provided with internal fixing mechanisms 12 located inside the placement position of the hub workpiece. The internal fixing mechanisms 12 fix the hub workpiece from the inside under the driving action of the internal fixing gear 11.

[0047] As an embodiment of the present invention, the internal fixing mechanism 12 includes:

[0048] An internal fixing rod 13, the internal fixing rod 13 penetrates through the fixed platform 1 and is rotatably connected to the fixed platform 1;

[0049] A transmission gear 14, the transmission gear 14 is fixedly connected to the lower end of the internal fixing rod 13, and the transmission gear 14 meshes with the internal fixing gear 11;

[0050] A cam clamping block 15, the cam clamping block 15 is sleeved on the part of the upper end of the internal fixing rod 13 extending out of the fixed platform 1, and the outer edge of the cam clamping block 15 abuts against the inner ring of the hub workpiece during the rotation of the internal fixing rod 13.

[0051] As an embodiment of the present invention, the fixing position of the outer clamping slider 6 on the outer ring of the hub workpiece and the fixing position of the cam clamping block 15 on the inner ring of the hub workpiece are not collinear.

[0052] During operation, when the hub workpiece is placed on the fixed platform 1, its weight presses the induction spring block 9 elastically installed on the platform, so that during the process of the outer fixing mechanism 3 realizing the clamping and fixing of the outer ring of the hub through the rotation of the outer fixing disk 4, the rotation of the outer fixing disk 4 also drives the internal fixing gear 11 fixedly connected thereto to rotate. The internal fixing gear 11 meshes with the transmission gear 14 of the internal fixing mechanism 12, driving the internal fixing rod 13 to rotate, and then pressing the cam clamping block 15 against the inner ring of the hub to achieve internal fixing; this internal and external combined fixing method, through the design of the non-collinear fixing positions of the outer clamping slider 6 and the cam clamping block 15 that are in direct contact with the hub workpiece, effectively disperses the fixing force, avoids the deformation of the hub caused by concentrated stress, and ensures the stability of the hub during the processing process.

[0053] As an embodiment of the present invention, the sum of the major axis of the elliptical cam clamping block 15 and the shortest distance from its side to the center of the fixed platform 1 is greater than the radius length of the inner ring of the hub workpiece.

[0054] As an embodiment of the present invention, a plate-shaped protrusion 17 extends inward from the sleeve hole 16 of the cam clamping block 15 and the internal fixing rod 13. The part of the internal fixing rod 13 located in the sleeve hole 16 also extends outward with the same plate-shaped protrusion 17, and a differential spring 18 is fixedly connected between the two plate-shaped protrusions 17 of the cam clamping block 15 and the internal fixing rod 13 at the sleeve hole 16.

[0055] As an implementation manner of the present invention, a limiting stop block 19 is fixedly connected to the side of the plate-shaped protrusion 17 of the inner fixing rod 13 in the sleeve hole 16 along the rotation direction of the inner fixing rod 13, and the differential springs 18 installed on both sides of the limiting stop block 19 are hard springs with a stiffness coefficient of more than 500 N / m.

[0056] During operation, through the selection of the hard springs of the differential springs 18, when the inner fixing rod 13 drives the cam clamping block 15 to rotate, due to insufficient thrust, the differential springs 18 will not be compressed preferentially, but the cam clamping block 15 will be directly pushed by the differential springs 18 to rotate until the cam clamping block 15 contacts the inner ring of the hub. At this time, the inner ring of the hub placed on the fixed platform 1 is positioned, and the outer clamping slider 6 of the outer fixing mechanism has not yet contacted the outer ring of the hub. After that, since the sum of the major axis of the elliptical cam clamping block 15 and the shortest distance from its side to the center of the fixed platform 1 is greater than the inner ring radius length of the hub workpiece, the cam clamping block 15 is blocked and interfered by the inner ring of the hub and cannot continue to rotate. However, at this time, the outer fixing disk 4 is still rotating. Therefore, the inner fixing rod 13 starts to compress the differential springs 18 until the limiting stop block 19 of the inner fixing rod 13 contacts and interferes with the plate-shaped protrusion 17 of the sleeve hole 16. At this time, the outer fixing disk 4 just stops rotating, and the outer clamping slider 6 completes the clamping and fixing work on the outer ring of the hub. Through the design of the differential springs 18 and their related structures in the sleeve hole 16, the inner fixing mechanism 12 first positions the hub workpiece, and then the outer fixing mechanism 3 completes the clamping and fixing of the hub workpiece, thus achieving the technical effect of ensuring the accurate position of the hub during the processing process and avoiding the processing errors caused by inaccurate positioning, and improving the fixing efficiency and processing accuracy of the machine tool for the hub workpiece.

[0057] The above shows and describes the basic principles, main features and remarkable advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above specific implementation manners. Without departing from the spirit and scope of the present invention, the present invention may also be subject to various changes and improvements to adapt to different usage environments and customer requirements, and these changes and improvements all fall within the protection scope of the present invention. The protection scope required by the present invention is defined by the appended claims and their equivalents.

Claims

1. An internal and external bidirectional fixing device for hub processing, including a fixed platform (1) on which a hub workpiece to be processed is placed; It is characterized in that: The fixed platform (1) is evenly provided with T-shaped grooves (2) extending from the edge to the center. An external fixing mechanism (3) is installed below the fixed platform (1). The external fixing mechanism (3) includes: An external fixing disk (4) located directly below the fixed platform (1) and rotatably connected to the fixed platform (1); A power component (5) for driving the external fixing disk (4) to perform periodic reciprocating rotation at a fixed angle; An external clamping slider (6), and the "I"-shaped external clamping slider (6) is slidably connected in the T-shaped groove (2); A transmission rod (7). The outer edge of the external fixing disk (4) is evenly fixedly connected with connecting columns (8) the same as those below the external clamping slider (6). The transmission rod (7) is sleeved on the connecting columns (8) connecting the external fixing disk (4) and the external clamping slider (6) and is rotatably connected to the two connecting columns (8); A number of induction elastic blocks (9) are evenly and elastically installed circumferentially at the placement position of the outer ring of the hub workpiece on the upper end of the fixed platform (1). A driving switch of the power component (5) is installed in the installation groove below the induction elastic block (9); An internal fixing gear (11) is also installed between the external fixing disk (4) and the fixed platform (1). The internal fixing gear (11) is fixedly connected to the external fixing disk (4). An internal fixing mechanism (12) is also evenly installed on the fixed platform (1) inside the placement position of the hub workpiece. The internal fixing mechanism (12) fixes the hub workpiece from the inside under the transmission action of the internal fixing gear (11); The internal fixing mechanism (12) includes: An internal fixing rod (13) passing through the fixed platform (1) and rotatably connected to the fixed platform (1); A transmission gear (14) fixedly connected to the lower end of the internal fixing rod (13), and the transmission gear (14) meshes with the internal fixing gear (11); A cam clamping block (15) sleeved on the part of the upper end of the internal fixing rod (13) extending out of the fixed platform (1). The outer edge of the cam clamping block (15) abuts against the inner ring of the hub workpiece during the rotation of the internal fixing rod (13); A plate-shaped protrusion (17) extends inward from the sleeve hole (16) where the cam clamping block (15) and the internal fixing rod (13) are sleeved. The part of the internal fixing rod (13) located in the sleeve hole (16) also extends outward with the same plate-shaped protrusion (17). A differential spring (18) is fixedly connected between the two plate-shaped protrusions (17) at the sleeve hole (16) of the cam clamping block (15) and the internal fixing rod (13); 2. The internal and external two-way fixing device for hub processing according to claim 1, wherein: The T-shaped groove (2) extends towards the center of the fixed platform (1) to the induction elastic block (9) and penetrates through the entire edge of the fixed platform (1) towards the edge direction; 3. An internal and external bidirectional fixing device for hub processing according to claim 1, characterized in that: A profiling jaw (10) is detachably installed above the external clamping slider (6). The side of the profiling jaw (10) close to the hub workpiece is a concave curved surface with the same shape as the outer ring of the hub workpiece.

4. A two-way internal and external fixing device for hub processing according to claim 1, characterized in that: The fixed position of the outer clamping slider (6) on the outer ring of the hub workpiece is not collinear with the fixed position of the cam clamping block (15) on the inner ring of the hub workpiece.

5. The internal and external bidirectional fixing device for hub processing according to claim 1, wherein: The sum of the major axis of the elliptical cam clamping block (15) and the shortest distance from its side to the center of the fixed platform (1) is greater than the inner ring radius length of the hub workpiece.

6. The internal and external two-way fixing device for hub processing according to claim 1, characterized in that: On the side of the plate-shaped protrusion (17) of the inner fixing rod (13) in the sleeve hole (16) along the rotation direction of the inner fixing rod (13), a limit stop block (19) is also fixedly connected, and the differential springs (18) installed on both sides of the limit stop block (19) are hard springs with a stiffness coefficient of more than 500 N / m.

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