Floating cutter loosening mechanism
By designing a floating loosening mechanism, the loosening force is converted to avoid direct effect on the bearing, which solves the problem of loosening force reducing the life of the bearing in the prior art and improves the service life and accuracy of the bearing.
Patent Information
- Application Number
- CN202421688633.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-16
- Publication Date
- 2025-07-25
- Estimated Expiration
- 2034-07-16
AI Technical Summary
During the process of unwinding the tool of the existing electric spindle, the loosening force acts on the bearing, resulting in a reduction in the service life of the bearing.
A floating loosening mechanism is designed to push the spindle pull rod through the piston, and the thrust is converted by the cooperation of the floating pull ring and the return spring, so that the force does not directly act on the bearing, reducing the impact on the bearing.
It effectively reduces the impact of loosening tool on bearing life and accuracy, and improves the service life and accuracy of bearings.
Smart Images
Figure CN223146650U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of electric spindles, in particular to a floating tool loosening mechanism. Background Art
[0002] The electric spindle loosens and locks the tool handle through the tool loosening and pulling system. During the tool loosening process, the piston obtains the thrust of the hydraulic oil and moves forward quickly, directly pushing the spindle pull rod forward. Due to the reaction force between the spindle pull rod and the mandrel, the tool loosening force will all act on the bearing. The disadvantage of this tool loosening method is that it will reduce the service life of the bearing and cause it to fail prematurely. Utility Model Content
[0003] The technical problem to be solved by the utility model is to overcome the deficiencies in the prior art and provide a floating knife loosening mechanism.
[0004] The technical solution adopted by the utility model to solve its technical problems is: a floating knife loosening mechanism is arranged on the main shaft, a main shaft housing is arranged outside the main shaft, a core shaft is arranged on the center line of the main shaft, the core shaft is installed in the main shaft housing through a bearing, a main shaft pull rod is passed through the core shaft, the main shaft pull rod part is located outside the core shaft, a knife loosening buckle seat is sleeved on the main shaft pull rod located outside the core shaft, a floating pull ring combined with or separated from the knife loosening buckle seat is also arranged outside the core shaft, a reset spring is arranged inside the floating pull ring, the floating pull ring is connected to a connecting seat, the connecting seat is connected to a cylinder body, a piston that moves back and forth is arranged inside the cylinder body, and the center line of the piston coincides with the center line of the main shaft pull rod.
[0005] Furthermore, one end of the main shaft pull rod is connected to a pull rod head with a step disk structure.
[0006] Furthermore, a supporting step is provided at one end of the connecting seat connected to the floating pull ring, and a convex ring is provided on the inner wall of the connecting seat corresponding to the supporting step.
[0007] Furthermore, the outer ring of the loosening knife buckle seat is clearance-matched with the inner wall of the convex ring.
[0008] Furthermore, an avoidance groove is provided on the inner side wall of the floating pull ring, and a locking nut for locking the bearing is connected to a position on the core shaft corresponding to the avoidance groove.
[0009] Furthermore, an internal thread is provided on the inner wall of the locking nut, and an external thread section matching with the internal thread is provided on the core shaft.
[0010] Furthermore, a rear end cover is provided at the rear end of the piston, and the rear end cover is located outside the cylinder body.
[0011] Furthermore, a limiting sleeve is arranged between the bearing and the spindle housing.
[0012] The beneficial effects of the present utility model are as follows: The piston of the present utility model obtains the thrust of hydraulic oil and moves forward rapidly, pushing the spindle drawbar forward. At the same time, due to the existence of the reaction force, the rear end cover, piston, cylinder block, connecting seat and floating pull ring will move backward together. The piston continues to push forward, making the floating pull ring fit with the tool release reverse buckle seat, converting all the thrust generated by the piston into the internal force of each component in the cylinder block, avoiding the transmission of force to the bearing on the spindle. When the piston returns, the reset spring built into the floating pull ring will reset the floating pull ring. This device greatly reduces the influence of tool release on the bearing life and accuracy. Brief Description of the Drawings
[0013] The present utility model will be further described below in conjunction with the drawings and embodiments.
[0014] Figure 1 It is a schematic structural diagram of the present utility model.
[0015] In the figure: 1. Rear end cover, 2. Piston, 3. Cylinder block, 4. Connecting seat, 41. Support step, 42. Convex ring, 5. Spindle drawbar, 51. Drawbar head, 6. Tool release reverse buckle seat, 7. Core shaft, 71. External thread section, 8. Floating pull ring, 81. Avoidance groove, 9. Reset spring, 10. Spindle housing, 11. Bearing, 12. Limit sleeve, 13. Locking nut. Specific Embodiments
[0016] Now the present utility model will be further described in conjunction with the drawings. These drawings are all simplified schematic diagrams, only illustrating the basic structure of the present utility model in a schematic manner, so they only show the components related to the present utility model.
[0017] As Figure 1 shown, a floating tool release mechanism is provided on the spindle. There is a spindle housing 10 outside the spindle. A core shaft 7 is arranged on the center line of the spindle. The core shaft 7 is installed in the spindle housing 10 through a bearing 11. A spindle drawbar 5 is penetrated inside the core shaft 7. Part of the spindle drawbar 5 is located outside the core shaft 7. A tool release reverse buckle seat 6 is sleeved on the spindle drawbar 5 located outside the core shaft 7. A floating pull ring 8 that combines with or separates from the tool release reverse buckle seat 6 is also provided outside the core shaft 7. A reset spring 9 is arranged inside the floating pull ring 8. The floating pull ring 8 is connected to a connecting seat 4. The connecting seat 4 is connected to a cylinder block 3. A piston 2 that moves forward and backward is arranged inside the cylinder block 3. The center line of the piston 2 coincides with the center line of the spindle drawbar 5. A rear end cover 1 is arranged at the rear end of the piston 2. The rear end cover 1 is located outside the cylinder block 3. A limit sleeve 12 is arranged between the bearing 11 and the spindle housing 10.
[0018] Among them, one end of the main shaft pull rod 5 is connected to a pull rod head 51 of a step disk structure. One end of the connecting seat 4 connected to the floating pull ring 8 is provided with a support step 41, and a convex ring 42 is provided on the inner wall of the connecting seat 4 corresponding to the support step 41. There is a gap between the outer ring of the loosening knife reverse buckle seat 6 and the inner wall of the convex ring 42. An avoidance groove 81 is provided on the inner side wall of the floating pull ring 8, and a locking nut 13 for locking the bearing 11 is connected to the position of the core shaft 7 corresponding to the avoidance groove 81.
[0019] Specific working principle: Piston 2 obtains the thrust of hydraulic oil and moves forward quickly, pushing the main shaft tie rod 5 forward. When piston 2 reaches the rear end of tie rod 5, since the force required to push tie rod 5 is much greater than the pulling force of reset spring 9, reset spring 9 is compressed, and the reaction force of piston 2 thrust will cause floating pull ring 8 and the components connected to it at the rear end to move backward. When the floating gap H disappears with the rearward movement of the components, floating pull ring 8 fits with loosening knife anti-lock seat 6, so that the thrust of piston 2 is borne by loosening knife anti-lock seat 6 and floating pull ring 8 and its rear end components, avoiding the force from being transmitted to the bearings on the main shaft. When piston 2 returns, the reset spring 9 built into floating pull ring 8 will reset the floating pull ring 8.
[0020] The above-mentioned implementation mode is only for illustrating the technical concept and features of the utility model, and its purpose is to enable people familiar with this technology to understand the content of the utility model and implement it. It cannot be used to limit the protection scope of the utility model. All equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.
Claims
1. A floating loose tool mechanism is provided on a main shaft. A main shaft housing (10) is arranged outside the main shaft. A core shaft (7) is arranged on the center line of the main shaft. The core shaft (7) is installed in the main shaft housing (10) through a bearing (11), and it is characterized in that: A spindle pull rod (5) is inserted into the mandrel (7). Part of the spindle pull rod (5) is located outside the mandrel (7). A tool release reverse buckle seat (6) is sleeved on the spindle pull rod (5) located outside the mandrel (7). An outer floating pull ring (8) that is combined with or separated from the tool release reverse buckle seat (6) is also provided outside the mandrel (7). A return spring (9) is arranged inside the floating pull ring (8). The floating pull ring (8) is connected to a connecting seat (4). The connecting seat (4) is connected to a cylinder block (3). A piston (2) that moves back and forth is arranged inside the cylinder block (3). The center line of the piston (2) coincides with the center line of the spindle pull rod (5).
2. The floating loose knife mechanism according to claim 1, characterized in that: A pull rod head (51) is installed at one end of the spindle pull rod (5).
3. The floating loose knife mechanism according to claim 1, characterized in that: One end of the connecting seat (4) connected to the floating pull ring (8) is provided with a support step (41), and an inner convex ring (42) is arranged on the inner wall of the connecting seat (4) corresponding to the support step (41).
4. The floating loose knife mechanism according to claim 3, wherein: A gap exists between the outer ring of the tool release reverse buckle seat (6) and the inner wall of the convex ring (42).
5. The floating loose knife mechanism according to claim 1, characterized in that: An avoidance groove (81) is arranged on the inner side wall of the floating pull ring (8), and a locking nut (13) of a locking bearing (11) is connected to the mandrel (7) at a position corresponding to the avoidance groove (81).
6. The floating loose knife mechanism according to claim 5, characterized in that: Internal threads are arranged on the inner wall of the locking nut (13), and an external thread section (71) that mates with the internal threads is arranged on the mandrel (7).
7. The floating loose knife mechanism according to claim 1, wherein: A rear end cover (1) is arranged at the rear end of the piston (2), and the rear end cover (1) is located outside the cylinder block (3).
8. The floating loose knife mechanism according to claim 1, wherein: A limit sleeve (12) is arranged between the bearing (11) and the spindle housing (10).