A clamping mechanism with an external spline input shaft
By combining the upper and lower centers and the internal and external splines, the problem of traditional positioning methods being unable to provide high loads is solved, achieving low-cost, high-precision input shaft gear positioning and high load transmission, which is suitable for automated robot operation.
Patent Information
- Application Number
- CN202521772450.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-20
- Publication Date
- 2026-06-02
- Estimated Expiration
- 2035-08-20
AI Technical Summary
In traditional input shaft gear inspection, the center hole positioning method cannot provide high load, and the expansion mandrel clamping method is costly and lacks precision, making it difficult to meet the needs of automatic loading and unloading by robots.
It adopts a connection method of upper and lower centers combined with internal and external splines. The input shaft gear is precisely positioned and high load is transmitted through the cooperation of the upper center and the limit ring. The internal spline is elastically moved on the upper center, and the connection between the internal and external splines transmits power. It is suitable for automatic loading and unloading of robots.
It achieves low-cost, high-precision input shaft gear positioning, provides high-load detection conditions, is suitable for automated robot operation, and reduces clamping costs.
Smart Images
Figure CN224310493U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of gear measurement technology. Background Technology
[0002] With the development of new energy vehicles, the input shaft gear, which plays a key role in the gears of new energy vehicles, has an increasingly significant impact on the quality of the vehicle. The inspection of this input shaft is no longer limited to the inspection of gear measuring centers and gear double-sided meshing instruments. More attention is being paid to the ghost frequency detection of the gear. When performing gear ghost frequency detection, it is necessary to accurately position the gear and apply high loads to the gear. Therefore, although the traditional method of using center hole positioning can achieve accurate positioning, it cannot provide high load drive detection.
[0003] Meanwhile, when performing ghost frequency detection on the input shaft, a robot is needed for automatic loading and unloading. The traditional clamping method is to use the lower expansion mandrel to clamp the bearing position of the input shaft gear and the upper center hole for positioning. However, this method requires the expansion mandrel to automatically expand and loosen, which is very costly. In addition, the positioning method of expanding the bearing position of the input shaft is not as accurate as the positioning method of using both upper and lower center holes. Utility Model Content
[0004] The present invention aims to solve the above-mentioned problems and to design a clamping mechanism that is low-cost, has high positioning accuracy, can provide high load capacity, and is suitable for automatic loading and unloading of robots.
[0005] A clamping mechanism with an external spline input shaft is characterized in that: an upper center is fixed to a drive shaft system by screws; an inner spline sleeve is inserted into the outer spline of the upper center via a spline fit; a baffle is fixed to the upper end of the inner spline sleeve, and in the free state, the baffle always fits against the groove of the upper center to ensure that the inner spline sleeve does not fall off; a compression spring is inserted into the upper center, with its upper end fitting against the end face step of the upper center and its lower end fitting against the upper end of the baffle, thereby realizing the elastic up-and-down movement function of the inner spline sleeve on the upper center; and the lower end of a limiting ring is inserted into a movable lower center via an interference fit, allowing the limiting ring to rotate with the movable lower center. The input shaft gear is positioned within the upper inner hole of the limiting ring, using a clearance fit to prevent it from tipping over and to provide coarse positioning. The lower center hole of the input shaft gear contacts the movable lower center, and the upper center is inserted into the upper center hole of the input shaft gear. The two centers precisely position the input shaft gear. Simultaneously, the upper inner hole of the limiting ring disengages from the lower bearing seat of the input shaft gear, and the inner spline of the inner spline sleeve is inserted into the outer spline of the input shaft gear. At this point, the connection between the inner and outer splines acts as a drive, thereby transmitting the power of the drive shaft system to the input shaft gear and providing a high load for ghost frequency measurement.
[0006] The advantages of this utility model compared to the prior art are: it directly uses the upper and lower center positioning instead of the traditional gear bearing positioning, resulting in high clamping accuracy; the load is transferred through the connection of internal and external splines, which is lower in cost compared to the expansion mandrel method; and the workpiece only needs to be placed in the positioning ring, while the rest of the clamping action can be completed automatically, making it suitable for automatic loading and unloading of robots. Attached Figure Description
[0007] Figure 1 This is a cross-sectional view of the spline sleeve after it has been inserted into the device.
[0008] Figure 2 This is a cross-sectional view of the top tip before it is inserted in this embodiment of the utility model.
[0009] Figure 3 This is a cross-sectional view of the spline sleeve of this utility model in a state where it fails to be properly inserted. Detailed Implementation
[0010] A clamping mechanism with an external spline input shaft comprises: a drive shaft system 1, an upper center 2, an external spline of the upper center 21, a compression spring 3, a baffle 4, an internal spline sleeve 5, an internal spline of the internal spline sleeve 51, an input shaft gear 6, an external spline of the input shaft gear 61, a lower bearing seat of the input shaft gear 62, a limit ring 7, and a movable lower center 8.
[0011] The upper center 2 is fixed to the drive shaft 1 by screws. The inner spline sleeve 5 is inserted into the outer spline 21 of the upper center through a spline fit. The baffle 4 is fixed to the upper end of the inner spline sleeve 5. In the free state, the baffle 4 always fits into the groove of the upper center 2 to ensure that the inner spline sleeve 5 will not fall off. The compression spring 3 is inserted into the upper center 2, with its upper end fitting into the end face step of the upper center 2 and its lower end fitting into the upper end of the baffle 4, thereby realizing the elastic up and down movement function of the inner spline sleeve 5 on the upper center 2. The lower end of the limiting ring 7 is inserted into the movable lower center 8 through an interference fit. The limiting ring 7 can rotate with the movable lower center 8. The input shaft gear 6 is placed on The upper inner hole of the limiting ring 7 is fitted with a clearance fit to prevent the input shaft gear 6 from tipping over and to provide coarse positioning. The lower center hole of the input shaft gear 6 contacts the movable lower center 8. After the upper center 2 is pushed into the upper center hole of the input shaft gear 6, the two centers provide precise positioning for the input shaft gear 6. At the same time, the upper inner hole of the limiting ring 7 disengages from the lower bearing seat 62 of the input shaft gear, and the inner spline 51 of the inner spline sleeve is inserted into the outer spline 61 of the input shaft gear. At this time, the connection between the inner and outer splines acts as a drive, thereby realizing the transmission of power from the drive shaft system 1 to the input shaft gear 6, providing a high load for ghost frequency measurement.
[0012] The operation of a clamping mechanism with an external spline input shaft is as follows: The robot places the input shaft gear 6 into the limiting ring 7. At this time, the input shaft gear 6 is coarsely positioned under the action of the limiting ring 7 and the movable lower center 8. The upper center 2 begins to rotate and descend. During the rotation, the inner spline 51 of the inner spline sleeve will first enter the outer spline 61 of the input shaft gear. Then, the upper center 2 will push against the upper center hole of the input shaft gear 6 to complete the gear clamping. At this time, the drive shaft system 1 can transmit power to the input shaft gear 6 through the inner spline sleeve 5 to provide a high load for ghost frequency measurement. During the rotation and descent of the upper center 2, there may be a phenomenon where the inner spline 51 of the inner spline sleeve cannot enter the outer spline 61 of the input shaft gear. At this time, the compression spring 3 is compressed, and the lower end face of the inner spline sleeve 5 will contact the upper end face of the input shaft gear 6. At this time, the upper center 2 will automatically rise and rotate and descend again to complete the gear clamping.
Claims
1. A clamping mechanism with an external spline input shaft, characterized in that, The upper center (2) is fixed to the drive shaft (1) by screws. The inner spline sleeve (5) is inserted into the outer spline (21) of the upper center by spline engagement. The baffle (4) is fixed to the upper end of the inner spline sleeve (5). In the free state, the baffle (4) always fits into the groove of the upper center (2). The compression spring (3) is inserted into the upper center (2). The upper end fits into the end face step of the upper center (2), and the lower end fits into the upper end of the baffle (4), thereby realizing the elastic up and down movement function of the inner spline sleeve (5) on the upper center (2). The lower end of the limiting ring (7) is inserted into the movable lower center (8) by interference fit. The limiting ring (7) can rotate with the movable lower center (8). The input shaft gear (6) is placed on The upper end of the limiting ring (7) is fitted with a clearance fit to prevent the input shaft gear (6) from tipping over and to provide coarse positioning. The lower end of the input shaft gear (6) is in contact with the movable lower center (8). After the upper center (2) is pushed into the upper center hole of the input shaft gear (6), the upper and lower centers provide precise positioning for the input shaft gear (6). At the same time, the upper end of the limiting ring (7) is disengaged from the lower bearing position (62) of the input shaft gear. Meanwhile, the inner spline (51) of the inner spline sleeve is inserted into the outer spline (61) of the input shaft gear. At this time, the connection between the inner and outer splines acts as a drive, thereby realizing the transmission of power from the drive shaft system (1) to the input shaft gear (6) and providing a high load for ghost frequency measurement.