A dynamic balancing testing device for hub machining

Abstract

This invention belongs to the field of wheel hub processing technology, and specifically relates to a dynamic balancing testing device for wheel hub processing. It includes a telescopic bracket, a base frame mounted on the telescopic bracket, a limiter mounted on the base frame, and upper and lower fixed frames fixedly connected to the base frame. An upper rotating ring is rotatably connected to the upper fixed frame, and a lower rotating ring is rotatably connected to the lower fixed frame. The lower rotating ring has several limiting grooves, and a sliding rod is slidably connected within each limiting groove. The sliding rod is equipped with an elastic telescopic rod. This invention keeps the wheel hub's rotation axis vertical, reducing the probability of the wheel hub exerting skew pressure on the limiter due to gravity, ensuring uniform force distribution on the limiter, and providing limiting and support around the wheel hub. This reduces the probability of the limiter being skewed due to wheel hub misalignment, thereby ensuring the verticality of the limiter and the accuracy of the wheel hub testing results.

Description

Technical Field

[0001] This invention relates to the field of wheel hub processing technology, and in particular to a dynamic balancing testing device for wheel hub processing. Background Technology

[0002] The wheel hub is a key rotating component in a vehicle system that connects the wheels to the axle. The uniformity of its mass distribution directly affects the stability of the vehicle. After processes such as casting, machining, and heat treatment, the wheel hub usually needs to undergo dynamic balancing to identify and correct any imbalance.

[0003] In an existing wheel hub dynamic balancing testing device, the rotation axis of the wheel hub needs to be kept vertical before driving the wheel hub to rotate in order to perform dynamic balancing testing. However, this testing method causes the entire weight of the wheel hub to act on the clamping point of the wheel hub, which leads to stress concentration at the wheel hub clamp. Furthermore, there will be slight differences in mass at different parts of the wheel hub circumferentially. As the wheel hub rotates, the clamp is deformed due to the long-term influence of the wheel hub's skewed rotational force, thus affecting the accuracy of the test results. Summary of the Invention

[0004] In order to overcome the shortcomings mentioned in the background art, the present invention provides a dynamic balancing testing device for wheel hub processing.

[0005] The technical solution is as follows: A dynamic balancing testing device for wheel hub processing includes a telescopic bracket, a base frame mounted on the telescopic bracket, a limiter mounted on the base frame, and a sensing module provided on the limiter. The sensing module is used to detect the unbalanced force generated by the limiter during rotation. An upper fixed frame and a lower fixed frame are fixedly connected to the base frame. An upper rotating ring is rotatably connected to the upper fixed frame, and a lower rotating ring is rotatably connected to the lower fixed frame. The lower rotating ring is provided with a plurality of circumferentially evenly distributed limiting grooves. A sliding rod is slidably connected in the limiting grooves. The sliding rod is slidably connected to the upper rotating ring, and the sliding rod is provided with an elastic telescopic rod.

[0006] Preferably, the rotation axis of the limiter is vertical.

[0007] Preferably, the telescopic part of the elastic telescopic rod is rotatably connected to a rotating frame, and a torsion spring is fixedly connected between the rotating frame and the telescopic part of the elastic telescopic rod. The rotating frame is rotatably connected to symmetrically distributed ball bearings.

[0008] Preferably, the base frame is equipped with a gearbox, the input shaft of the gearbox is connected to the limiter via a sprocket and chain drive, the output shaft of the gearbox is connected to the lower rotating ring via a gear set drive, the lower rotating ring is slidably connected with a plurality of circumferentially evenly distributed limit pins, the upper rotating ring is used to limit all the limit pins, a first elastic element is fixedly connected between the limit pins and the lower rotating ring, and the upper rotating ring is provided with a number of limit holes equal to the number of limit pins, the limit holes being used to limit the corresponding limit pins.

[0009] Preferably, the frictional resistance between the upper fixed frame and the upper rotating ring is F. f The force F that causes the upper rotating ring to rotate when all the sliding rods slide along their respective limiting grooves is _____. s The force F that causes the upper rotating ring to rotate due to friction from all the aforementioned limiting pins is... P F f >F s +F P .

[0010] Preferably, the elastic telescopic rod is rotatably connected to the adjacent sliding rod, the sliding rod is slidably connected to an adjusting rod, the adjusting rod and the adjacent elastic telescopic rod are driven by a gear and rack, the adjusting rod is fixedly connected to a weight, and the lower rotating ring is provided with a guide surface, the guide surface is used to guide all the weights.

[0011] Preferably, the rotating frame is inclined, and the central axis of all the elastic telescopic rods passes through the rotation axis of the limiter.

[0012] Preferably, the fixed part of the elastic telescopic rod is fixed with an elastic pad.

[0013] Preferably, the telescopic bracket is slidably connected to symmetrically distributed support frames, and a second elastic element is fixedly connected between the support frames and the telescopic bracket.

[0014] Preferably, the telescopic bracket is provided with symmetrically distributed grooves, which are used to provide space for adjacent support frames.

[0015] This invention has the following advantages: By keeping the rotation axis of the wheel hub vertical, it reduces the probability of the wheel hub exerting skew pressure on the limiter due to gravity, ensuring uniform force distribution on all parts of the limiter. It also provides limiting and support around the wheel hub, reducing the probability of the limiter being skewed due to installation misalignment. This ensures the verticality of the limiter and the accuracy of the wheel hub test results. Furthermore, as the balls gradually compress the wheel hub, the telescopic part of the elastic telescopic rod gradually contracts to adjust the compressive force of the balls on the wheel hub, simulating the resistance experienced by the wheel hub under different road conditions, thereby increasing the diversity of the wheel hub dynamic balance test results. During wheel hub rotation, the elastic pad compresses the wheel hub to adjust the pressure experienced during rotation, thus simulating the dynamic balance test results after the wheel hub is affected by tire deformation during actual rotation, improving the accuracy of the dynamic balance test results. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a three-dimensional structural diagram of the telescopic bracket and limiter of the present invention; Figure 3 This is an exploded three-dimensional view of the telescopic bracket and limiter of the present invention; Figure 4 This is a three-dimensional structural diagram of the guide surface of the present invention; Figure 5 This is a three-dimensional structural diagram of the limiting pin and limiting hole of the present invention; Figure 6 This is a three-dimensional structural diagram of the elastic pad of the present invention.

[0017] The meanings of the reference numerals in the attached diagram are as follows: 1: Telescopic bracket, 2: Base frame, 3: Limiter, 4: Upper fixed frame, 5: Lower fixed frame, 6: Upper rotating ring, 7: Lower rotating ring, 701: Limiting groove, 8: Sliding rod, 9: Elastic telescopic rod, 10: Rotating frame, 11: Torsion spring, 12: Ball bearing, 13: Gearbox, 14: Limiting pin, 15: Limiting hole, 16: Adjusting rod, 17: Weight, 18: Guide surface, 19: Elastic pad, 20: Support frame, 21: Groove. Detailed Implementation

[0018] The present invention will be further described below with reference to specific embodiments. The illustrative embodiments and descriptions herein are used to explain the present invention, but are not intended to limit the present invention.

[0019] Example 1 A dynamic balancing testing device for wheel hub processing, such as Figures 1-6As shown, the device includes a telescopic bracket 1, on which a control terminal (not shown) is mounted. The telescopic bracket 1 is electrically connected to the control terminal. A base frame 2 is mounted on the telescopic bracket 1, and a limit switch 3, also electrically connected to the control terminal, is mounted on the base frame 2. The limit switch 3 is equipped with a sensor module electrically connected to the control terminal. This sensor module is an existing structure and is not shown in the figure. The sensor module is used to detect the unbalanced force (vibration) generated by the limit switch 3 during rotation. By measuring the vibration during rotation, the mass and location of the wheel hub's unbalance point are deduced. The limit switch 3 is used to adjust the wheel hub... The limiter 3 is fixed and drives the hub to rotate. The rotation axis of the limiter 3 is vertical, making the plane containing the rotation axis of the hub also vertical. This reduces the probability of the hub exerting skew pressure on the limiter 3 due to gravity, ensuring that the limiter 3 is evenly stressed. The base frame 2 is fixedly connected to an upper fixed frame 4 and a lower fixed frame 5, which are distributed vertically. The upper fixed frame 4 is rotatably connected to an upper rotating ring 6, and the lower fixed frame 5 is rotatably connected to a lower rotating ring 7. The lower rotating ring 7 is provided with several circumferentially evenly distributed limiting grooves 701. The limiting grooves 701 are inclined, and a sliding rod 8 is slidably connected within the limiting grooves 701. Figure 1 The top view serves as the reference for the rotation direction. When the lower rotating ring 7 rotates counterclockwise, the limiter 3 drives the hub to rotate clockwise. The limit groove 701 presses the sliding rod 8 towards the hub. The sliding rod 8 is slidably connected to the upper rotating ring 6. The sliding rod 8 is equipped with an elastic telescopic rod 9. In this embodiment, the sliding rod 8 is fixedly connected to the adjacent elastic telescopic rod 9. The telescopic part of the elastic telescopic rod 9 is rotatably connected to a rotating frame 10. A torsion spring 11 is fixedly connected between the rotating frame 10 and the telescopic part of the elastic telescopic rod 9. Two symmetrically distributed balls 12 are rotatably connected to the rotating frame 10. If the hub is tilted, the rotating frame 10 and the telescopic part of the elastic telescopic rod 9 rotate relative to each other. The torsion spring 11 twists and stores force, and the telescopic part of the elastic telescopic rod 9 adaptively extends and retracts, so that the two balls 12 on the rotating frame 10 do not stick together. With the same shape of wheel hub surface, after the wheel hub is fixed on the limiter 3, there is a distance between the ball bearing 12 and the wheel hub when the limiter 3 starts to rotate. During the movement of the sliding rod 8, the fixed part of the elastic telescopic rod 9 is moved by the sliding rod 8. The telescopic part of the elastic telescopic rod 9 drives the two ball bearings 12 to move through the rotating frame 10. The two ball bearings 12 gradually limit and support the wheel hub around, so as to reduce the probability of the limiter 3 being biased due to the wheel hub being misaligned, thereby ensuring the verticality of the limiter 3 and the accuracy of the wheel hub detection results. As the ball bearings 12 gradually squeeze the wheel hub, the telescopic part of the elastic telescopic rod 9 gradually contracts to adjust the squeezing force of the ball bearings 12 on the wheel hub, simulating the resistance of the wheel hub under different road conditions, thereby increasing the diversity of the wheel hub dynamic balance detection results.

[0020] like Figure 1 , Figure 2 , Figure 4 and Figure 5As shown, the base frame 2 is equipped with a transmission 13. The input shaft of the transmission 13 is connected to the limiter 3 via a sprocket and chain drive, and the output shaft of the transmission 13 is connected to the lower rotating ring 7 via a gear set. During the rotation of the limiter 3, the limiter 3 drives the lower rotating ring 7 through the transmission 13 and the gear set. The rotation direction of the lower rotating ring 7 is opposite to the rotation direction of the limiter 3, causing the ball bearing 12 to rotate in the opposite direction to the rotation direction of the wheel hub. This simulates the road force experienced by the wheel hub during actual rotation, improving the accuracy of the wheel hub dynamic balance test results. The lower rotating ring 7 slides... A plurality of circumferentially evenly distributed limiting pins 14 are connected. The upper part of the limiting pin 14 is provided with a plane and an inclined surface. Initially, the upper rotating ring 6 presses against the plane of the limiting pin 14. The upper rotating ring 6 is used to limit all the limiting pins 14. A first elastic element is fixed between the limiting pin 14 and the lower rotating ring 7. The first elastic element is a compression spring and is initially in a compressed and stored state. The upper rotating ring 6 is provided with a number of limiting holes 15 equal to the number of limiting pins 14. The limiting holes 15 are used to limit the corresponding limiting pins 14. The frictional resistance between the upper fixed frame 4 and the upper rotating ring 6 is F. f When all the sliding rods 8 slide along their respective limiting grooves 701, the force that causes the upper rotating ring 6 to rotate is F. s All the limiting pins 14 work together through friction to cause the upper rotating ring 6 to rotate, and the force is F. P F f >F s +F P When the lower rotating ring 7 rotates, it first drives all the limiting pins 14 to rotate. The lower rotating ring 7 rotates relative to the upper rotating ring 6. The limiting groove 701 presses the sliding rod 8 to move towards the hub. After the sliding rod 8 moves to its limit, the limiting pin 14 moves to align with the corresponding limiting hole 15. The upper rotating ring 6 loses its limitation on all the limiting pins 14. The first elastic element pops out and drives the limiting pin 14 to move into the corresponding limiting hole 15. Then, the lower rotating ring 7 drives the upper rotating ring 6 to rotate through the limiting pin 14 and the limiting hole 15. The upper rotating ring 6, the lower rotating ring 7, the sliding rod 8, the elastic telescopic rod 9, the rotating frame 10, and the ball bearing 12 rotate together.

[0021] The specific working principle is as follows: When the operator needs to use this device to perform dynamic balancing tests on the wheel hub, the operator places the wheel hub on the upper side of the telescopic bracket 1, so that the limiter 3 passes through the rotation axis of the wheel hub, and then opens the telescopic bracket 1 and the limiter 3 through the control terminal. The limiter 3 fixes the wheel hub, and the upper part of the telescopic bracket 1 moves downward away from the wheel hub. The operator closes the telescopic bracket 1 and the limiter 3 through the control terminal.

[0022] After the wheel hub is fixed, the operator activates the limit switch 3 via the control terminal to... Figure 1The top view serves as the reference for the rotation direction, causing the limiter 3 to rotate clockwise. The limiter 3 drives the wheel hub to rotate clockwise (at this time, the wheel hub and the ball bearings 12 are not in contact; the dynamic balance result of the wheel hub without constraint is first tested). The limiter 3 drives the lower rotating ring 7 through the gearbox 13 and gear set, causing the lower rotating ring 7 to rotate counterclockwise. The limit groove 701 presses the sliding rod 8 to move towards the wheel hub. The sliding rod 8 drives the fixed part of the elastic telescopic rod 9 to move. The telescopic part of the elastic telescopic rod 9 drives the two ball bearings 12 to move through the rotating frame 10. The two ball bearings 12 gradually limit and support the wheel hub to reduce the probability of the limiter 3 being biased due to the wheel hub being misaligned during installation, thereby ensuring the verticality of the limiter 3 and the accuracy of the wheel hub test results. As the ball bearings 12 gradually press the wheel hub, the telescopic part of the elastic telescopic rod 9 gradually contracts to adjust the pressing force of the ball bearings 12 on the wheel hub, simulating the resistance experienced by the wheel hub under different road conditions, thereby increasing the diversity of the wheel hub dynamic balance test results.

[0023] After the sliding rod 8 moves to its limit state, the limiting pin 14 moves to align with the corresponding limiting hole 15. The first elastic element pops out and drives the limiting pin 14 to move into the corresponding limiting hole 15. Then, the lower rotating ring 7 drives the upper rotating ring 6 to rotate through the limiting pin 14 and the limiting hole 15. The upper rotating ring 6, the lower rotating ring 7, the sliding rod 8, the elastic telescopic rod 9, the rotating frame 10, and the ball bearing 12 rotate together. The ball bearing 12 rotates in the opposite direction to the rotation of the wheel hub, simulating the road force experienced by the wheel hub during actual rotation, thereby improving the accuracy of the wheel hub dynamic balance test results.

[0024] After the wheel hub dynamic balancing test is completed, the limiter 3 is reversed via the control terminal. The limiter 3 drives the wheel hub to rotate counterclockwise. The lower rotating ring 7 of the limiter 3 rotates clockwise via the transmission 13 and gear set. The lower rotating ring 7 drives all the limit pins 14 to start resetting. The inclined surface of the limit pin 14 is pressed downward by the upper rotating ring 6, and the first elastic element is compressed and reset. As the lower rotating ring 7 rotates clockwise and resets, the sliding rod 8, the elastic telescopic rod 9, the rotating frame 10, and the ball bearing 12 gradually reset. Then, the limiter 3 is stopped rotating via the control terminal. The telescopic bracket 1 is opened via the control terminal. The upper part of the telescopic bracket 1 moves upward and resets. The limiter 3 no longer fixes the wheel hub. Then the operator removes the wheel hub and closes the telescopic bracket 1 and the limiter 3 via the control terminal.

[0025] Example 2 Based on Example 1, such as Figure 4 and Figure 6As shown, in the above embodiment, the sliding rod 8 is fixedly connected to the adjacent elastic telescopic rod 9. In this embodiment, the elastic telescopic rod 9 is rotatably connected to the adjacent sliding rod 8. The sliding rod 8 is slidably connected to an adjusting rod 16. The adjusting rod 16 and the adjacent elastic telescopic rod 9 are driven by a gear and rack. The adjusting rod 16 is fixedly connected to a weight 17. The lower rotating ring 7 is provided with a guide surface 18. During the process of the sliding rod 8 moving towards the hub, the sliding rod 8 drives the weight 17 to move through the adjusting rod 16. The guide surface 18 guides all the weights 17. The weights 17 move downward along the guide surface 18, causing the adjusting rod 16 to move downward. The adjusting rod 16 drives the elastic telescopic rod 9 to rotate through the gear and rack. The telescopic part of the elastic telescopic rod 9 is driven by the rotating frame 10. When the moving ball 12 rotates, initially, the rotating frame 10 is tilted, and the central axis of all the elastic telescopic rods 9 passes through the rotation axis of the limiter 3. The fixed part of the elastic telescopic rod 9 is fixed with an elastic pad 19. After the telescopic part of the elastic telescopic rod 9 drives the ball 12 to rotate through the rotating frame 10, the rotating frame 10 gradually rotates to a vertical state. The squeezing force of the ball 12 on the rotating frame 10 on the wheel hub increases. At the same time, the fixed part of the elastic telescopic rod 9 drives the elastic pad 19 to move. The elastic pad 19 moves relative to the rotating frame 10 and squeezes the wheel hub to adjust the pressure on the wheel hub during rotation. This simulates the dynamic balance test results after the wheel hub is affected by tire deformation during actual rotation, thus improving the accuracy of the dynamic balance test results.

[0026] Example 3 Based on Example 2, such as Figure 3 As shown, the telescopic bracket 1 is slidably connected to a support frame 20 symmetrically distributed on both sides. A second elastic element, which is a tension spring, is fixed between the support frame 20 and the telescopic bracket 1. The telescopic bracket 1 is provided with symmetrically distributed grooves 21, which provide space for the support frame 20. During the wheel hub installation process, the wheel hub is placed on the upper side of the support frame 20 and the telescopic bracket 1. The second elastic element is stretched. After the wheel hub is placed, the upper part of the telescopic bracket 1 retracts, and the upper part of the telescopic bracket 1 moves downward relative to the support frame 20. After the second elastic element pops out and resets, the upper part of the telescopic bracket 1 moves downward and drives the support frame 20 to move downward through the second elastic element, so that there is a gap between the support frame 20 and the wheel hub. During the installation and rotation of the wheel hub, if the wheel hub is misaligned, the wheel hub moves downward and squeezes the support frame 20 to support the wheel hub through the support frame 20, reducing the probability of damage to the limiter 3 due to wheel hub misalignment.

[0027] The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly. They should not be construed as limiting the scope of protection of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A dynamic balancing testing device for wheel hub processing, characterized in that it includes: There is a telescopic bracket (1), the telescopic bracket (1) is equipped with a base frame (2), the base frame (2) is equipped with a limiter (3), the limiter (3) is equipped with a sensor acquisition module, the sensor acquisition module is used to detect the unbalanced force generated by the limiter (3) during rotation, the base frame (2) is fixedly connected with an upper fixed frame (4) and a lower fixed frame (5) distributed vertically, the upper fixed frame (4) is rotatably connected with an upper rotating ring (6), the lower fixed frame (5) is rotatably connected with a lower rotating ring (7), the lower rotating ring (7) The device is provided with several circumferentially evenly distributed limiting grooves (701). A sliding rod (8) is slidably connected in the limiting groove (701). The sliding rod (8) is slidably connected to the upper rotating ring (6). The sliding rod (8) is provided with an elastic telescopic rod (9). The telescopic part of the elastic telescopic rod (9) is rotatably connected to a rotating frame (10). A torsion spring (11) is fixed between the rotating frame (10) and the telescopic part of the elastic telescopic rod (9). The rotating frame (10) is rotatably connected with symmetrically distributed ball bearings (12).

2. The dynamic balancing testing device for wheel hub processing according to claim 1, characterized in that, The rotation axis of the limiter (3) is vertical.

3. The dynamic balancing testing device for wheel hub processing according to claim 1, characterized in that, The base frame (2) is equipped with a gearbox (13). The input shaft of the gearbox (13) is connected to the limiter (3) via a sprocket and chain drive. The output shaft of the gearbox (13) is connected to the lower rotating ring (7) via a gear set drive. The lower rotating ring (7) is slidably connected with a number of circumferentially evenly distributed limit pins (14). The upper rotating ring (6) is used to limit all the limit pins (14). The limit pins (14) are fixedly connected to the lower rotating ring (7) with a first elastic element. The upper rotating ring (6) is provided with a number of limit holes (15) the same as the number of limit pins (14). The limit holes (15) are used to limit the corresponding limit pins (14).

4. The dynamic balancing testing device for wheel hub processing according to claim 3, characterized in that, The frictional resistance between the upper fixed frame (4) and the upper rotating ring (6) is F. f When all the sliding rods (8) slide along the corresponding limiting grooves (701), the force that causes the upper rotating ring (6) to rotate is F. s The force F that causes the upper rotating ring (6) to rotate due to friction from all the limiting pins (14) is together. P F f >F s +F P .

5. The dynamic balancing testing device for wheel hub processing according to claim 1, characterized in that, The elastic telescopic rod (9) is rotatably connected to the adjacent sliding rod (8). The sliding rod (8) is slidably connected to an adjusting rod (16). The adjusting rod (16) and the adjacent elastic telescopic rod (9) are driven by a gear and rack. The adjusting rod (16) is fixedly connected to a weight (17). The lower rotating ring (7) is provided with a guide surface (18). The guide surface (18) is used to guide all the weights (17).

6. The dynamic balancing testing device for wheel hub processing according to claim 5, characterized in that, The rotating frame (10) is inclined, and the central axis of all the elastic telescopic rods (9) passes through the rotation axis of the limiter (3).

7. The dynamic balancing testing device for wheel hub processing according to claim 6, characterized in that, The elastic telescopic rod (9) is fixedly connected to an elastic pad (19).

8. The dynamic balancing testing device for wheel hub processing according to claim 1, characterized in that, The telescopic bracket (1) is slidably connected to symmetrically distributed support frames (20), and a second elastic element is fixed between the support frames (20) and the telescopic bracket (1).

9. The dynamic balancing testing device for wheel hub processing according to claim 8, characterized in that, The telescopic bracket (1) is provided with symmetrically distributed grooves (21), which are used to provide space for adjacent support frames (20).

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