Balancing piece fixing structure
By interfering with a low-carbon steel ring on the spline sleeve and projecting a balance plate onto it, the problem of welding cracks in the balance plate was solved, achieving qualified dynamic balance and a low scrap rate for the drive shaft.
Patent Information
- Application Number
- CN202520235925.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-13
- Publication Date
- 2026-02-27
- Estimated Expiration
- 2035-02-13
AI Technical Summary
In the existing technology, the balance plate is prone to welding cracks after projection welding on the spline sleeve surface, resulting in a high defect rate and affecting the dynamic balance effect of the drive shaft.
The rings made of low-carbon steel are interference-fitted onto the outer circle of the spline sleeve, and balance plates are projected onto the rings to prevent welding cracks. Weight compensation is achieved by adjusting the position of the balance plates.
It effectively eliminated welding cracks, reduced product scrap rate, and ensured the dynamic balance of the drive shaft and the performance of the spline sleeve.
Smart Images
Figure CN223953110U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the field of transmission shaft dynamic balance, specifically relates to a balance sheet fixed structure. BACKGROUND
[0002] As Figure 1 , 2 , the existing bridge transmission shaft (1') is in the dynamic balance process, after dynamic balance detection, the equipment will show that the convex welding balance sheet A (2') on the spline sleeve is required to be at a certain angle position to carry out weight compensation, so as to reduce the residual unbalance, so as to reach the qualified range. The balance sheet is fixed on the spline sleeve surface through two convex welding spots. Since the spline sleeve is made of medium carbon steel material and is processed through heat treatment, the spline sleeve surface hardness is high, and the internal stress is large, so that the balance sheet is very easy to produce welding cracks at the welding spot position after being convex welded on the spline sleeve surface, causing product scrap and high unqualified rate. UTILITY MODEL CONTENTS
[0003] The utility model discloses a balance sheet fixed structure, which overcomes the defects of the prior art, does not affect the weight compensation function of the balance sheet, makes the residual unbalance of the transmission shaft reach the qualified range, solves the problem of balance sheet convex welding spot cracks, and eliminates welding cracks at the welding spot position after the balance sheet is convex welded.
[0004] The utility model discloses a balance sheet fixed structure, which overcomes the defects of the prior art, does not affect the weight compensation function of the balance sheet, makes the residual unbalance of the transmission shaft reach the qualified range, solves the problem of balance sheet convex welding spot cracks, and eliminates welding cracks at the welding spot position after the balance sheet is convex welded.
[0005] As a further technical scheme, the sleeve ring is interference fitted on the large end outer circle of the spline sleeve.
[0006] The utility model discloses a balance sheet fixed structure, which overcomes the defects of the prior art, does not affect the weight compensation function of the balance sheet, makes the residual unbalance of the transmission shaft reach the qualified range, solves the problem of balance sheet convex welding spot cracks, and eliminates welding cracks at the welding spot position after the balance sheet is convex welded.
[0007] 1. By interference pressure fixed a low carbon steel material sleeve ring on the spline sleeve, the problem of balance sheet convex welding spot cracks is solved, and welding cracks at the welding spot position are eliminated after the balance sheet is convex welded.
[0008] 2. Since the sleeve ring is interference fitted on the large end outer circle of the spline sleeve, the normal strength of the spline sleeve is not affected, and the use function and performance of the spline sleeve are ensured.
[0009] 3. For different residual imbalances, the position of the balancing plate on the bushing can be adjusted without affecting the weight compensation of the balancing plate, so that the residual imbalance of the drive shaft is within the acceptable range. Attached Figure Description
[0010] Figure 1 This is a schematic diagram of the structure of the balance plate projected onto the inter-bridge drive shaft in the prior art.
[0011] Figure 2 This is a schematic diagram of the structure of a balance plate in the prior art.
[0012] Figure 3 for Figure 2 AA sectional view.
[0013] Figure 4 This is a schematic diagram of the structure of this utility model.
[0014] Figure 5 This is a schematic diagram of the balance ring structure in this utility model.
[0015] Figure 6 for Figure 5 View B.
[0016] Explanation of reference numerals in the attached diagram: 1' inter-axle drive shaft, A2' balance plate;
[0017] 1. Flange fork; 2. Welded fork; 3. Spline sleeve; 4. Sealing sleeve; 5. Spline shaft fork; 6. Sleeve ring; 7. Balance plate. Detailed Implementation
[0018] The present invention will now be described in detail with reference to the accompanying drawings:
[0019] Example: As attached Figures 4 to 6 As shown, this balancer fixing structure includes a flange fork 1, a welding fork 2, a spline sleeve 3, a sealing sleeve 4, a spline shaft fork 5, a collar 6, and a balancer 7.
[0020] Reference Appendix Figure 4 The flange fork 1, welding fork 2, spline sleeve 3, sealing sleeve 4, and spline shaft fork 5 together form the inter-bridge drive shaft. The front end (spline end) of the spline shaft fork 5 is connected to the spline sleeve 3 via a spline fit, and a sealing sleeve 4 is welded to the outer wall of the spline shaft fork 5 for sealing. The rear end (fork section) of the spline shaft fork 5 is connected to a flange fork 1 via a cross shaft. The front end of the spline sleeve 3 is welded and fixed to the welding fork 2, and the welding fork 2 is connected to another flange fork 1 via a cross shaft. Preferably, the collar 6 is interference-fitted onto the outer circumference of the large end of the spline sleeve 3, near the welding position, and a balance piece 7 is projected onto the collar 6 at the location of any imbalance to meet the requirements for residual imbalance, such as... Figure 4 As shown. The collar 6 adopts a ring-shaped structure, as...Figure 5 、 6 As shown in the figure, preferably, the ring 6 is made of low carbon steel material with low carbon content and is not processed by heat treatment, so that the surface internal stress is small, and thus no welding cracks are generated at the welding point position after the projection welding of the balancing piece.
[0021] The working process of the utility model is as follows: in the dynamic balancing process, if there is an unbalance amount at a certain angle of the tested bridge transmission shaft 360°, the projection welding of the balancing piece 7 is performed at the angle position on the low carbon steel ring 6 to meet the requirement of the residual unbalance amount. Since the surface internal stress of the low carbon steel ring 6 is small, no welding cracks are generated at the welding point position after the projection welding of the balancing piece 7. For different residual unbalance amounts, the welding position of the balancing piece 7 can be adjusted to achieve the adaptation.
[0022] The improved balancing piece fixing structure completely eliminates the crack problem of the projection welding of the balancing piece, and reduces the product scrap loss.
[0023] It can be understood that, for those skilled in the art, the technical scheme and the utility model concept of the utility model can be replaced or changed equivalently, which shall belong to the protection range of the claims attached to the utility model.
Claims
1. A balance sheet fixing structure characterized by: The invention relates to a kind of axle shafts, comprising cross shaft and the ring (6) of sleeve set in the cross shaft, the cross shaft comprises spline yoke (5), one end of spline yoke (5) is sealed sleeve (4) by spline fit and postwelding after being welded with spline sleeve (3), the other end of spline yoke (5) is connected with one flange fork (1) by cross shaft;Spline sleeve (3) is welded and fixed with welded fork (2), and the other flange fork (1) is connected with welded fork (2) by cross shaft;The ring (6) is set on the outer wall of spline sleeve (3), and the position of unbalance amount exists in the ring (6) and is projection welded balance piece (7).
2. The balance sheet fixing structure according to claim 1, characterized by: The ring (6) is interference fit on the large end outer circle of spline sleeve (3).