Diamond grinding wheel fixing structure
The hydraulic expansion mandrel structure solves the problem of loosening of the grinding wheel body in the grinder, realizes rapid locking and stable operation of the grinding wheel, and avoids mechanical damage.
Patent Information
- Application Number
- CN202423140267.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-19
- Publication Date
- 2025-09-16
- Estimated Expiration
- 2034-12-19
AI Technical Summary
In traditional grinding machines, the grinding wheel body tends to loosen when rotating at high speed and subjected to tangential force, resulting in axial movement, damage to the spindle and bed, and even causing the grinding wheel to explode.
It adopts a hydraulic expansion mandrel structure, which locks the expansion sleeve to the inner wall of the grinding wheel body through the combination of hydraulic and mechanical structure design to ensure fixed stability.
It realizes the rapid locking of the grinding wheel body and the stability of high-speed operation, avoids the damage caused by loosening, and the structural design is ingenious and easy to operate.
Smart Images
Figure CN223339182U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of grinding machines, and particularly relates to a diamond grinding wheel fixing structure. Background Art
[0002] Traditional grinding machines typically use clamps to hold the grinding wheel in place, secured in place by bolts. However, the high-speed rotation of the grinding wheel, coupled with the significant tangential forces it bears, combined with mechanical vibrations, can often loosen the bolts. This can cause the grinding wheel to move axially during use, damaging the spindle and machine bed, and in severe cases, even causing the grinding wheel to explode.
[0003] Therefore, it is necessary to design a new grinding wheel body fixing structure to solve the above problems. Utility Model Content
[0004] The purpose of this utility model is to provide a diamond grinding wheel fixing structure to address the deficiencies of the existing technology. The specific solution is as follows:
[0005] A diamond grinding wheel fixing structure comprises a grinding wheel body and a hydraulic expansion core shaft for fixing the grinding wheel body, the hydraulic expansion core shaft comprises a base, one side of the base is provided with a fixed head integrally formed therewith, the other side of the base is provided with a core shaft, the fixed head, the base and the core shaft are coaxial, the core shaft is also sleeved with an expansion sleeve with an interference fit therewith, the expansion sleeve is used to fit with the inner wall of the grinding wheel body and lock it; the base is provided with an oil chamber extending from its side to its interior, the oil chamber is provided with a sleeve, the end of the oil chamber is also provided with a fixing nut for fixing the sleeve, the fixing nut is threadedly connected to the base, the fixing nut itself is threadedly connected with a rotary joint, the bottom end of the rotary joint is connected to a piston slidably arranged in the sleeve through a rotary joint, and the bottom The seat is also provided with a first channel extending from the oil chamber to its outside; a positioning ring is provided at one end of the expansion sleeve, a cylindrical shell-shaped oil storage chamber is provided in the expansion sleeve, a plurality of oil inlets extending from its inner wall to the oil storage chamber are provided on the expansion sleeve, and a plurality of positioning holes are also provided on the inner wall of the expansion sleeve; the positioning ring is fixed to the base by a plurality of positioning bolts; a second channel docking with the first channel and a liquid separation chamber connected with the second channel are provided in the core shaft, a plurality of branch channels connecting the second channel and the oil inlet are provided in the core shaft, the liquid separation chamber is connected with a plurality of sliding chambers in the core shaft, a lifting plate is provided for sliding in the sliding chamber, and a plurality of positioning rods for the plurality of positioning holes are respectively provided on the plurality of lifting plates, and a tension spring that applies thrust to the lifting plate is also provided in the sliding chamber.
[0006] Based on the above, the base and the positioning ring are provided with annular grooves corresponding to each other, and a rubber sealing ring is provided in the annular groove.
[0007] Based on the above, the end of the core shaft is further provided with a threaded hole communicating with the liquid separation chamber, and an exhaust bolt is screwed into the threaded hole.
[0008] Based on the above, a plurality of positioning screw holes are provided on the fixing head.
[0009] The present invention has outstanding substantial features and progress compared to the prior art. Specifically, the present invention has the following advantages:
[0010] 1. The diamond grinding wheel fixing structure provided by the utility model facilitates the rapid locking and fixing of the grinding wheel body and can ensure the stability of the grinding wheel body when running at high speed. The structural design is ingenious and easy to operate and use.
[0011] 2. The diamond grinding wheel fixing structure provided by the present invention has a structural design of the hydraulic mandrel that not only makes it easy to fix and use, but also facilitates fixing the expansion sleeve during use, thereby ensuring the working performance of the hydraulic mandrel. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 It is a schematic diagram of the overall state of the utility model.
[0013] Figure 2 It is a schematic diagram of the overall structure of the hydraulic core shaft in the utility model.
[0014] In the figure: 1. Base; 1-1. Fixed head; 1-2. Positioning screw hole; 2. Core shaft; 3. Oil chamber; 4. Fixing nut; 5. Sleeve; 6. Pressure bolt; 7. Rotary joint; 8. Piston; 9. First channel; 10. Second channel; 11. Branch channel 1; 12. Liquid separation chamber; 13. Sliding chamber; 14. Lifting plate; 15. Positioning rod; 16. Tension spring; 17. Exhaust bolt; 18. Expansion sleeve; 18-1. Positioning ring; 18-2. Oil storage chamber; 18-3. Oil inlet; 19. Positioning bolt; 20. Rubber sealing ring; 23. Grinding wheel body. DETAILED DESCRIPTION
[0015] The technical solution of the present utility model is further described in detail below through specific implementation methods.
[0016] Example
[0017] like Figure 1-2As shown, the utility model provides a diamond grinding wheel fixing structure, including a grinding wheel body 23 and a hydraulic expansion core shaft for fixing the grinding wheel body 23, the hydraulic expansion core shaft includes a base 1, one side of the base 1 is provided with a fixed head 1-1 integrally formed therewith, and the other side of the base 1 is provided with a core shaft 2, the fixed head 1-1, the base 1 and the core shaft 2 are coaxial, and the core shaft 2 is also sleeved with an expansion sleeve 18 with an interference fit therewith, and the expansion sleeve 18 is used to fit with the inner wall of the grinding wheel body 23 and lock it; the base 1 is provided with an oil chamber 3 extending from its side to its interior, a sleeve 5 is provided in the oil chamber 3, and a fixing nut 4 for fixing the sleeve 5 is also provided at the end of the oil chamber 3, the fixing nut 4 is threadedly connected to the base 1, and the fixing nut 4 itself is threadedly connected with a rotary joint 7, the bottom end of the rotary joint 7 is connected to a piston 8 slidably arranged in the sleeve 5 through the rotary joint 7, and the base 1 is also provided with an oil chamber extending from the side to the interior thereof, 3 extends to the first channel 9 outside it; one end of the expansion sleeve 18 is provided with a positioning ring 18-1, and a cylindrical shell-shaped oil storage chamber 18-2 is provided in the expansion sleeve 18, and a plurality of oil inlets 18-3 extending from its inner wall to the oil storage chamber 18-2 are provided on the expansion sleeve 18, and the inner wall of the expansion sleeve 18 is also provided with a plurality of positioning holes; the positioning ring 18-1 is fixed to the base 1 by a plurality of positioning bolts 19; a second channel 10 docking with the first channel 9 and a liquid separation chamber 12 connected with the second channel 10 are provided in the core shaft 2, a plurality of branch channels 11 connecting the second channel 10 and the oil inlet 18-3 are provided in the core shaft 2, the liquid separation chamber 12 is connected with a plurality of sliding chambers 13 in the core shaft 2, a lifting plate 14 is slidingly provided in the sliding chamber 13, and a plurality of positioning rods 15 corresponding to the plurality of positioning holes are respectively provided on the plurality of lifting plates 14, and a tension spring 16 that applies thrust to the lifting plate 14 is also provided in the sliding chamber 13.
[0018] The base 1 and the positioning ring 18 - 1 are provided with annular grooves corresponding to each other, and a rubber sealing ring 20 is provided in the annular grooves.
[0019] In order to facilitate the discharge of gas stored in the oil in the core shaft 2, a threaded hole communicating with the liquid separation chamber 12 is provided at the end of the core shaft 2, and an exhaust bolt 17 is screwed into the threaded hole.
[0020] In order to facilitate the fixing of the hydraulic core shaft 2, a plurality of positioning screw holes 1-2 are provided on the fixing head 1-1.
[0021] The specific working principle of the utility model is as follows: first, the threaded hole of the hydraulic core shaft 2 is facing upward and the exhaust bolt 17 is removed, then the pressurizing screw is rotated to discharge the oil from the threaded hole to ensure that there is no gas in the hydraulic core shaft 2, and then the exhaust bolt 17 is screwed into the threaded hole.
[0022] Next, fix the hydraulic mandrel 2 on the machine tool, then put the grinding wheel body 23 on the expansion sleeve 18, and then turn the pressure bolt 6. Under the action of oil pressure, the lifting plate 14 moves toward the expansion sleeve 18, so that the positioning rod 15 is inserted into the positioning hole on the expansion sleeve 18. As the pressure bolt 6 continues to be screwed in, the expansion sleeve 18 expands radially and fits the inner wall of the grinding wheel body 23 to lock it.
[0023] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model and not to limit it; although the utility model is described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the specific implementation methods of the utility model can still be modified or some technical features can be replaced by equivalents; without departing from the spirit of the technical solution of the utility model, they should all be included in the scope of the technical solution for protection of the utility model.
Claims
1. A diamond grinding wheel fixing structure, characterized by: The invention comprises a grinding wheel body (23) and a hydraulic expansion mandrel for fixing the grinding wheel body (23), wherein the hydraulic expansion mandrel comprises a base (1), one side of the base (1) is provided with a fixed head (1-1) integrally formed therewith, and the other side of the base (1) is provided with a mandrel (2), the fixed head (1-1), the base (1) and the mandrel (2) are coaxial, and the mandrel (2) is also provided with an expansion sleeve (18) with an interference fit therewith, and the expansion sleeve (18) is used to fit with the inner wall of the grinding wheel body (23) and lock it; The base (1) is provided with an oil chamber (3) extending from its side to its interior, a sleeve (5) is provided in the oil chamber (3), and a fixing nut (4) for fixing the sleeve (5) is provided at the end of the oil chamber (3), the fixing nut (4) is screwed to the base (1), and a rotary joint (7) is screwed through the fixing nut (4), and the bottom end of the rotary joint (7) is connected to a piston (8) slidably provided in the sleeve (5) through the rotary joint (7). The base (1) is also provided with a first through hole extending from the oil chamber (3) to the outside thereof. Channel (9); a positioning ring (18-1) is provided at one end of the expansion sleeve (18); a cylindrical shell-shaped oil storage chamber (18-2) is provided in the expansion sleeve (18); a plurality of oil inlets (18-3) extending from the inner wall thereof to the oil storage chamber (18-2) are provided on the expansion sleeve (18); a plurality of positioning holes are also provided on the inner wall of the expansion sleeve (18); the positioning ring (18-1) is fixed to the base (1) by a plurality of positioning bolts (19); a second channel (10) docking with the first channel (9) and a second channel (11) docking with the first channel (11) are provided in the core shaft (2); The second channel (10) is connected to a liquid separation chamber (12), and a plurality of branch channels (11) are provided in the core shaft (2) to connect the second channel (10) and the oil inlet (18-3). The liquid separation chamber (12) is connected to a plurality of sliding chambers (13) in the core shaft (2). A lifting plate (14) is provided to slide in the sliding chamber (13). Positioning rods (15) corresponding to the plurality of positioning holes are provided on the plurality of lifting plates (14). A tension spring (16) is also provided in the sliding chamber (13) to apply thrust to the lifting plate (14).
2. The diamond grinding wheel fixing structure according to claim 1, characterized in that: Annular grooves corresponding to each other are provided on the base (1) and the positioning ring (18-1), and a rubber sealing ring (20) is provided in the annular groove.
3. The diamond grinding wheel fixing structure according to claim 1, characterized in that: The end of the core shaft (2) is also provided with a threaded hole communicating with the liquid separation chamber (12), and an exhaust bolt (17) is screwed into the threaded hole.
4. The diamond grinding wheel fixing structure according to claim 1, characterized in that: The fixing head (1-1) is provided with a plurality of positioning screw holes (1-2).