Axial floating main shaft, axial floating polishing main shaft and polishing device

Abstract

The utility model discloses an axial floating main shaft, an axial floating polishing main shaft and a polishing device, and belongs to the technical field of polishing shafts, the axial floating main shaft comprises a main shaft, a floating sleeve and an elastic balance structure; the floating sleeve is arranged on the main shaft in a sleeving mode, the floating sleeve can move in the axial direction of the main shaft and be positioned in the circumferential direction, and elastic balance structures are arranged at the two ends of the floating sleeve respectively and connected with the main shaft. The elastic balance structure comprises an elastic device and a fixing piece; the fixing piece is connected with the main shaft, the elastic device is located between the fixing piece and the end of the floating sleeve, and the elastic device is used for applying thrust to the floating sleeve and enabling the floating sleeve to be in a balance position; the axial floating main shaft adopts a floating design, and the floating sleeve dynamically adjusts the axial position of the profiling polishing wheel during polishing, so that the profiling polishing wheel and the steering screw rod realize self-calibration positioning, and the polishing precision of the steering screw rod is improved.

Description

Technical Field

[0001] This utility model relates to the field of polishing shaft technology, specifically to an axial floating spindle, an axial floating polishing spindle, and a polishing device. Background Technology

[0002] The autonomous driving function of new energy vehicles requires precise control of the steering mechanism. The steering screw is an important component of the steering mechanism of new energy vehicles. The steering screw plays a key role in converting the rotational motion of the motor into the steering angular displacement of the wheel. Its surface quality directly affects the steering accuracy. Therefore, the machining accuracy and surface finish of the steering screw are required to be high.

[0003] Steering screws are typically polished using a contour polishing wheel. The protrusions of the contour polishing wheel match the grooves of the steering screw, achieving a good surface finish. Before polishing, the steering screw is first mounted on the polishing machine. During mounting, the steering screw's position needs to be accurately corrected each time to ensure the protrusions of the contour polishing wheel are aligned with the grooves for optimal polishing. However, this method is inefficient, and misalignment between the contour polishing wheel and the grooves leads to rapid wear of the wheel and uneven wear on the steering screw, resulting in a surface finish that does not meet processing requirements. Utility Model Content

[0004] To address the problems existing in the prior art, this utility model provides an axial floating spindle, a polishing spindle, and a polishing device. Elastic balancing structures are set at both ends of the spindle, located on both sides of the contour polishing wheel. Through the dynamic adjustment of the elastic balancing structures, the contour polishing wheel is always kept in a balanced position, thereby improving the polishing quality of the steering screw.

[0005] This utility model is achieved through the following technical solution:

[0006] In a first aspect, this application provides an axially floating spindle, including a spindle, a floating sleeve, and an elastic balancing structure;

[0007] The floating sleeve is fitted onto the main shaft. The floating sleeve can move along the axial direction of the main shaft and be circumferentially positioned. Each end of the floating sleeve is provided with an elastic balancing structure, which is connected to the main shaft.

[0008] The elastic balance structure includes an elastic device and a fixing component;

[0009] The fixing member is connected to the main shaft, and the elastic device is located between the fixing member and the end of the floating sleeve. The elastic device is used to apply thrust to the floating sleeve and keep the floating sleeve in a balanced position.

[0010] Preferably, the floating sleeve is connected to the spindle via a spline.

[0011] Preferably, the elastic device is a helical compression spring, a disc spring, or elastic rubber.

[0012] Preferably, the compression spring is sleeved on the main shaft, with one end abutting against the fixing member and the other end abutting against the end of the floating sleeve.

[0013] Preferably, the elastic balancing structure is provided with a protective device.

[0014] Preferably, the protective device is a bellows cover;

[0015] The accordion cover is fitted onto the main shaft and located outside the elastic device. One end of the cover is connected to the end of the floating sleeve, and the other end is connected to the main shaft through a baffle.

[0016] Preferably, a rotating shaft sleeve is fixedly sleeved on the main shaft, a floating sleeve is sleeved on the rotating shaft sleeve via a spline, and a compression spring is sleeved on the rotating shaft sleeve.

[0017] Secondly, this application provides an axially floating polishing spindle, including a polishing wheel fixing device and the axially floating spindle;

[0018] The polishing wheel fixing device includes two clamping plates spaced apart, which are fixedly sleeved on the floating sleeve, and the contour polishing wheel is pressed between the clamping plates.

[0019] Preferably, a connecting sleeve is fixedly sleeved on the floating sleeve, and a clamping plate is disposed on the connecting sleeve.

[0020] Thirdly, this application provides a polishing device, including a servo motor and the axial floating polishing spindle, wherein the output shaft of the motor is nested and fixedly connected to the spindle.

[0021] Compared with the prior art, the present invention has the following beneficial technical effects:

[0022] This application provides an axially floating spindle with a floating design. The contour polishing wheel can float axially left and right on the spindle. A balanced axial force is applied to the left and right sides of the contour polishing wheel by springs. When the contour polishing wheel contacts the steering screw, if the protrusion of the contour polishing wheel is not positioned in the center of the groove of the steering screw, the polishing wheel is unbalanced. The balance spring is compressed, which pushes the polishing wheel to move axially, causing the polishing wheel to move to the center of the groove and complete the automatic positioning of the polishing wheel. The floating sleeve of the floating spindle dynamically adjusts the axial position of the contour polishing wheel, enabling the contour polishing wheel and the steering screw to achieve self-calibration positioning and improve the polishing accuracy of the steering screw. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is an external view of the axial floating polishing spindle of this utility model;

[0025] Figure 2 This is a cross-sectional view of the axial floating polishing spindle of this utility model;

[0026] Figure 3 This is an axial cross-sectional view of the axial floating polishing spindle of this utility model.

[0027] Figure 4 This is an exploded view of the axial floating polishing spindle of this utility model.

[0028] In the diagram: 1. Main spindle; 2. Contouring polishing wheel; 3. Rotary shaft sleeve; 4. Inner baffle; 5. Floating sleeve; 6. Compression spring; 7. Outer baffle; 8. Shaft pressure plate; 9. Connecting sleeve; 10. Wheel clamp plate; 11. Wheel pressure plate; 12. Large accordion cover; 13. Small accordion cover; 14-16. Bolts; 17. Anti-loosening nut. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0030] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0031] An axially floating spindle includes a spindle 1, a floating sleeve 5, and an elastic balancing structure;

[0032] The floating sleeve 5 is fitted on the main shaft. The floating sleeve 5 can move along the axial direction of the main shaft and be circumferentially positioned. The two ends of the floating sleeve 5 are respectively provided with elastic balancing structures, which are connected to the main shaft 1.

[0033] The elastic balance structure includes an elastic device and a fixing component;

[0034] The fixing part is connected to the main shaft, and the elastic device is located between the fixing part and the end of the floating sleeve 5. The elastic device is used to apply thrust to the floating sleeve and keep the floating sleeve in a balanced position.

[0035] This axial floating spindle has a floating sleeve on the spindle and elastic devices at both ends of the floating sleeve. The two elastic devices apply a thrust to the floating sleeve, so that the floating sleeve is in a balanced position. When this floating spindle is used in a polishing machine, the floating sleeve dynamically adjusts the axial position of the contour polishing wheel, so that the contour polishing wheel and the steering screw can achieve self-calibration positioning, thereby improving the polishing accuracy of the steering screw.

[0036] In some embodiments, the floating sleeve 5 is connected to the main shaft via a spline, enabling the floating sleeve 5 to move axially along the main shaft and be circumferentially positioned.

[0037] At least one spline is provided on the outer surface of the main shaft 1. The spline is axially arranged on the main shaft 1. The floating sleeve 5 is a sleeve structure with a spline groove in its inner hole that mates with the spline. The floating sleeve is fitted on the main shaft, and the spline and spline groove mate. This design allows the floating sleeve to move axially along the main shaft, while the spline positions the floating sleeve circumferentially.

[0038] In some embodiments, the elastic device is a helical compression spring 6, a disc spring, and elastic rubber, preferably a compression spring.

[0039] The compression spring 6 is sleeved on the main shaft, with one end abutting against the fixed part and the other end abutting against the end of the floating sleeve. The two compression springs are located at the two ends of the floating sleeve respectively, applying a thrust to the floating sleeve so that it is always in the equilibrium position. This equilibrium position is the matching position of the contour polishing wheel and the groove of the steering screw.

[0040] The fastener is a baffle, consisting of an inner baffle 4 and an outer baffle 7. The inner baffle 4 is located at the end of the spindle closest to the drive source, and the outer baffle 7 is located at the end of the spindle furthest from the drive source. The baffle has a ring structure, and the two baffles are fixedly sleeved on both ends of the spindle. The end of the compression spring abuts against the end face of the baffle. For example, nuts are provided at both ends of the baffle for fixing.

[0041] In some embodiments, the elastic balancing structure is provided with a protective device to prevent dust from entering between the spindle and the floating sleeve during polishing.

[0042] The protective device is a bellows cover, namely a large bellows cover 12 and a small bellows cover 13. The bellows cover is sleeved on the main shaft and located outside the compression spring. One end of the bellows cover is connected to the end of the floating sleeve, and the other end is connected to the baffle through the shaft pressure plate 8. The end of the main shaft is also provided with an anti-loosening nut 17, which contacts the shaft pressure plate 8.

[0043] In some embodiments, a rotating sleeve 3 is fitted on the spindle, and a floating sleeve is fitted on the rotating sleeve 3 via a spline. The rotating sleeve 3 isolates the spindle and the floating sleeve. The floating sleeve moves axially on the rotating sleeve. The rotating sleeve is fixedly connected to the spindle. A compression spring is fitted on the rotating sleeve. The rotating sleeve isolates the spindle and the floating sleeve, avoiding spindle wear, reducing spindle maintenance costs, and improving polishing accuracy.

[0044] Optionally, one end of the main shaft is provided with a connecting structure for connecting the drive shaft of the drive device.

[0045] In some embodiments, the floating sleeve is provided with a polishing wheel fixing device, which is connected to the contour polishing wheel.

[0046] Example 1

[0047] An axially floating polishing spindle includes an axially floating spindle and a polishing wheel fixing device.

[0048] The polishing wheel fixing device includes a wheel clamping plate 10 and a wheel pressure plate 11 arranged at intervals. The wheel clamping plate 10 and the wheel pressure plate 11 are fixedly sleeved on the floating sleeve. The contour polishing wheel 2 is pressed between the wheel clamping plate 10 and the wheel pressure plate 11. The wheel clamping plate 10 and the wheel pressure plate 11 are connected by bolts 15.

[0049] In some embodiments, a connecting sleeve 9 is fixedly sleeved on the floating sleeve 5. One end of the connecting sleeve 9 is provided with an end plate. The wheel clamping plate 10 contacts the end plate. Bolts 15 pass through the wheel pressure plate 11 and the wheel clamping plate 10 in sequence and are connected to the end plate. The connecting sleeve 9 is connected to the annular ear plate at the end of the floating sleeve by bolts 16.

[0050] Example 2

[0051] A polishing device includes a servo motor and an axial floating polishing spindle as described in Embodiment 1, wherein the output shaft of the motor is nested and fixedly connected to the spindle.

[0052] Insert the spindle into the servo motor shaft and lock it. The servo motor drives the spindle to rotate, which in turn drives the contour polishing wheel to rotate synchronously through the rotating sleeve, floating sleeve, and polishing wheel fixing device. There is a compression spring on each side of the rotating sleeve, which allows the polishing wheel to float axially. When the contour polishing wheel is not subjected to axial force, it remains in a balanced position. When the contour polishing wheel is not aligned with the lead screw groove, it will slide axially until it is aligned with the groove due to the axial force of the lead screw groove. When the contour polishing wheel is disengaged from the lead screw groove, it will return to the balanced position under the action of the two compression springs.

[0053] The above content is only for illustrating the technical concept of this utility model and should not be construed as limiting the scope of protection of this utility model. Any modifications made to the technical solution based on the technical concept proposed in this utility model shall fall within the scope of protection of the claims of this utility model.

Claims

1. An axially floating spindle, characterized in that, Includes spindle, floating sleeve and elastic balancing structure; The floating sleeve is fitted onto the main shaft. The floating sleeve can move along the axial direction of the main shaft and be circumferentially positioned. Each end of the floating sleeve is provided with an elastic balancing structure, which is connected to the main shaft. The elastic balance structure includes an elastic device and a fixing component; The fixing member is connected to the main shaft, and the elastic device is located between the fixing member and the end of the floating sleeve. The elastic device is used to apply thrust to the floating sleeve and keep the floating sleeve in a balanced position.

2. The axial floating spindle according to claim 1, characterized in that, The floating sleeve is connected to the spindle via a spline.

3. The axial floating spindle according to claim 1, characterized in that, The elastic device is a helical compression spring, a disc spring, and elastic rubber.

4. An axially floating spindle according to claim 3, characterized in that, The compression spring is sleeved on the main shaft, with one end abutting against the fixed part and the other end abutting against the end of the floating sleeve.

5. An axially floating spindle according to claim 1, characterized in that, The elastic balance structure is equipped with a protective device.

6. An axially floating spindle according to claim 5, characterized in that, The protective device is a bellows cover; The accordion cover is fitted onto the main shaft and located outside the elastic device. One end of the cover is connected to the end of the floating sleeve, and the other end is connected to the main shaft through a baffle.

7. An axially floating spindle according to claim 1, characterized in that, A rotating shaft sleeve is fixedly sleeved on the main shaft, a floating sleeve is sleeved on the rotating shaft sleeve via a spline, and a compression spring is sleeved on the rotating shaft sleeve.

8. An axially floating polishing spindle, characterized in that, Includes a polishing wheel fixing device and an axial floating spindle as described in any one of claims 1-7; The polishing wheel fixing device includes two clamps spaced apart, the clamps are fixedly sleeved on the floating sleeve, and the contour polishing wheel (2) is pressed between the clamps.

9. An axially floating polishing spindle according to claim 8, characterized in that, A connecting sleeve is fixedly fitted onto the floating sleeve, and a clamping plate is disposed on the connecting sleeve.

10. A polishing apparatus, characterized in that, It includes a servo motor and the axial floating polishing spindle as described in claim 8 or 9, wherein the output shaft of the motor is nested and fixedly connected to the spindle.

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