A grinding tool for internal grinding machine

Abstract

The invention discloses an internal cylindrical grinding tool for a grinding machine, comprising a driving structure and a mechanical structure, wherein the driving structure comprises a collar, a rear sealing ring is arranged on the collar, a water ring is arranged inside the collar, a motor stator is arranged inside the water ring, a motor rotor is arranged inside the motor stator, and a connecting rod is arranged inside the motor rotor. The invention overcomes the shortcomings of the prior art, optimizes the drawbacks of the existing internal cylindrical grinding tool through belt transmission, and improves according to the shortcomings of the built-in motor, and has high social use value and application prospects.

Description

Technical Field

[0001] The invention relates to the technical field of grinding tools, in particular to an internal grinding tool for a grinding machine. Background Art

[0002] The front end of the existing internal cylindrical grinding tool has a Morse taper hole. Different internal grinding rods are installed according to the depth of the grinding hole. Through the combination of four bearings DBB, one or more spring preloaded bearings are used. At the rear end, there is an outer cone to install the pulley of the grinding tool. A motor with a power of 2.2KW, a speed of 2800RPM and a speed increase ratio of 1:5 is used to drive the pulley of the grinding tool with a flat belt. However, when the motor runs at 2800RPM, the grinding tool will run at 14000RPM per minute due to the speed increase ratio, and the flat belt will produce a buzzing sound, affecting the surface quality of the processing and the safety of the workers.

[0003] The inner circle grinding tool is installed in the hole of the bracket, and a flat belt drive is usually used. The transmission vibration will be transmitted to the bearing raceway built into the grinding tool, causing the bearing to operate under load. Because the groove surfaces of the inner and outer rings and the raceway surfaces of the rolling elements are constantly and repeatedly loaded when they are vibrated, their use is very unfavorable to the accuracy and rigidity of the rolling bearing.

[0004] Therefore, the inventor has designed and developed an internal grinding tool for a grinding machine in order to achieve a more practical purpose. Summary of the invention

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] An internal grinding tool for a grinding machine comprises a driving structure and a mechanical structure, wherein the driving structure comprises a collar, a rear sealing ring is arranged on the collar, a water ring is arranged inside the collar, a motor stator is arranged inside the water ring, a motor rotor is arranged inside the motor stator, and a connecting rod is arranged inside the motor rotor;

[0007] The water ring is provided with a cooling groove and a notch.

[0008] Preferably, the mechanical structure comprises a sleeve spliced ​​with the collar, and a core shaft spliced ​​with the connecting rod is arranged in the sleeve.

[0009] Preferably, a middle spacer ring and a rear spacer ring are respectively provided at both ends of the core shaft, and ball bearings A fitted with the sleeve are provided at both ends of the middle spacer ring, and ball bearings B fitted with the sleeve are provided at both ends of the rear spacer ring.

[0010] Preferably, the ends of both ends of the core shaft are respectively provided with a front spacer ring and a rear nut, and the end of the sleeve is provided with a front nut for providing installation for the core shaft.

[0011] Preferably, a flange group is provided on the core shaft, and a grinding wheel is fixedly mounted on the flange group via flange pressure screws.

[0012] Preferably, an embedded groove is provided at the end of the core shaft, a docking flat key is provided in the embedded groove, and a key groove matching the docking flat key set is provided on the inner side of the end of the connecting rod.

[0013] Preferably, a deep groove ball bearing is provided on the rear sealing ring, a rear cover is provided on the end of the connecting rod, and a wave pipe joint communicating with the inner cavity of the sleeve ring is provided on the rear sealing ring.

[0014] Preferably, a first circulation cavity and a second circulation cavity are provided in the sleeve ring, a straight external thread joint A connected to the first circulation cavity is provided on the rear sealing ring, and a straight external thread joint B connected to the second circulation cavity is provided on the rear sealing ring.

[0015] Preferably, the collar is provided with a drainage hole for connecting the first circulation cavity and the second circulation cavity, and the end of the drainage hole is connected to the inside of the collar.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. Through the setting of the flange group and the cooperation between the mandrel and the flange pressure screw, the grinding wheel can be conveniently installed. The rotation of the connecting rod can be transmitted to the grinding wheel through the mandrel, so that the grinding wheel can be rotated, which provides stability for the rotation of the grinding wheel.

[0018] 2. Through the setting of the middle spacer ring and the rear spacer ring, and the cooperation between the ball bearing A, the front spacer ring, the ball bearing B and the rear nut, the rotation of the connecting rod can be smoothly transmitted to the grinding wheel through the core shaft, so that the grinding wheel can rotate smoothly, thereby improving the overall rigidity required when the grinding tool is working.

[0019] 3. Through the setting of the mandrel, flange assembly and flange pressure screw, the influence of noise and vibration generated by belt transmission on the service life of the bearing is eliminated, and the processing precision is further improved.

[0020] 4. By setting the corrugated pipe joint, the first circulation cavity and the second circulation cavity, and utilizing the cooperation between the water ring, the cooling groove and the incision, circulating coolant can be introduced into the interior of the cooling groove to complete the cooling operation of the internal components of the sleeve.

[0021] 5. By opening the drain hole, the circulating coolant flowing inside the cooling tank can be quickly discharged.

[0022] In summary, the present invention overcomes the deficiencies of the prior art, optimizes the drawbacks of the existing internal cylindrical grinding tool driven by belts, and improves on the shortcomings of the built-in motor, and has high social use value and application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 It is a schematic front view of the structure of the present invention;

[0026] Figure 3 It is a schematic side view of the structure of the present invention;

[0027] Figure 4 Based Figure 3 Schematic diagram of the structural section at AA in the middle;

[0028] Figure 5 Based Figure 3 Schematic diagram of the structural section at BB in the middle;

[0029] Figure 6 Based Figure 4 A magnified view of the local structure at point A in the middle;

[0030] Figure 7 Based Figure 4 A magnified view of the local structure at B in the middle;

[0031] Figure 8 It is a schematic cross-sectional view of the internal structure of the present invention;

[0032] Fig. 9 It is a schematic diagram of the structural explosion of the driving structure in the present invention;

[0033] Fig.10 It is a schematic diagram of the exploded structure of the mechanical structure of the present invention;

[0034] Fig.11 It is a schematic diagram of the structure of the water ring in the present invention;

[0035] Fig.12 It is a structural schematic diagram of the core shaft in the present invention;

[0036] Fig.13 It is a structural schematic diagram of the connecting rod in the present invention.

[0037] In the figure: 100, driving structure; 200, mechanical structure; 1, sleeve ring; 101, rear sealing ring; 1011, deep groove ball bearing; 1012, rear cover; 102, corrugated pipe joint; 103, first circulation cavity; 1031, straight-through external thread joint A; 104, second circulation cavity; 1041, straight-through external thread joint B; 2, sleeve; 21, mandrel; 2101, embedded groove; 211, docking flat key; 3, water ring; 301, cooling groove; 302, incision; 31, motor stator; 32, motor rotor; 33, connecting rod; 331, keyway; 4, drainage hole; 5, middle spacer ring; 51, ball bearing A; 52, front spacer ring; 6, rear spacer ring; 61, ball bearing B; 62, rear nut; 7, front nut; 8, flange group; 81, flange pressure screw; 9, grinding wheel. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] Example 1

[0040] Reference Figure 1-13 , an internal grinding tool for a grinding machine, comprising a driving structure 100 and a mechanical structure 200, wherein the driving structure 100 comprises a collar 1, wherein a direct-connected internal motor drive is arranged in the driving structure 100, wherein a rear sealing ring 101 is arranged on the collar 1, wherein a water ring 3 is arranged in the collar 1, wherein a motor stator 31 is arranged in the water ring 3, wherein a motor rotor 32 is arranged in the motor stator 31, wherein a connecting rod 33 is arranged in the motor rotor 32;

[0041] A cooling groove 301 is provided on the water ring 3, and a notch 302 is also provided on the water ring 3. The cooling groove 301 can form a cavity for liquid circulation between the water ring 3 and the sleeve ring 1, so that the liquid can circulate inside the cooling groove 301, and the notch 302 can allow liquid to circulate between adjacent cooling grooves 301. The two ends of the water ring 3 are sealed with the sleeve ring 1 through a sealing ring, and the number of cooling grooves 301 is four.

[0042] Specifically, the mechanical structure 200 includes a sleeve 2 spliced ​​with the ring 1, a core shaft 21 assembled with the connecting rod 33 is provided in the sleeve 2, and a sealing ring is provided at the splicing point between the ring 1 and the sleeve 2 to ensure that the liquid flowing inside the ring 1 will not enter the interior of the sleeve 2. The rotation of the connecting rod 33 can drive the core shaft 21 to rotate inside the sleeve 2.

[0043] Specifically, a middle spacer ring 5 and a rear spacer ring 6 are respectively provided at both ends of the core shaft 21, and ball bearings A51 that are fitted with the sleeve 2 are provided at both ends of the middle spacer ring 5, and ball bearings B61 that are fitted with the sleeve 2 are provided at both ends of the rear spacer ring 6. Through the arrangement of the middle spacer ring 5 and the rear spacer ring 6, the core shaft 21 can be rotated inside the sleeve 2 without shaking. The arrangement of the ball bearings A51 and the ball bearings B61 can enable the core shaft 21 and the sleeve 2 to be rotated and fitted, so that the sleeve 2 will not affect the rotation of the core shaft 21 inside it. The ball bearings A51 are arranged on both sides of the middle spacer ring 5, and the ball bearings B61 are arranged on both sides of the rear spacer ring 6.

[0044] Specifically, a front spacer ring 52 and a rear nut 62 are respectively provided at both ends of the core shaft 21, and a front nut 7 for providing installation for the core shaft 21 is provided at the end of the sleeve 2. The setting of the front spacer ring 52 and the rear nut 62 can cooperate with the middle spacer ring 5 and the rear spacer ring 6 to provide stability for the splicing between the core shaft 21 and the sleeve 2. The setting of the front nut 7 can install the core shaft 21 inside the sleeve 2 and seal the inside of the sleeve 2 to prevent debris from entering the cavity formed by the splicing between the core shaft 21 and the sleeve 2.

[0045] Specifically, a flange group 8 is provided on the core shaft 21, and a grinding wheel 9 is fixedly installed on the flange group 8 by a flange pressing screw 81. Through the setting of the flange group 8, the grinding wheel 9 can be fixed on the flange group 8, and then the flange group 8 loaded with the grinding wheel 9 is fixed to the end position of the core shaft 21 by the flange pressing screw 81.

[0046] Specifically, an embedded groove 2101 is provided at the end of the core shaft 21, and a docking flat key 211 is provided in the embedded groove 2101. A key groove 331 that matches the docking flat key 211 is provided on the inner side of the end of the connecting rod 33. The docking flat key 211 can be inserted into the key groove 331. During the assembly process of the ring 1 and the sleeve 2, the core shaft 21 and the connecting rod 33 can be directly assembled by embedding the docking flat key 211 into the key groove 331.

[0047] Example 2

[0048] Reference Figure 1-13 The difference between this embodiment and embodiment 1 is that a deep groove ball bearing 1011 is provided on the rear sealing ring 101, a rear cover 1012 is provided at the end of the connecting rod 33, and a wave pipe joint 102 connected to the inner cavity of the collar 1 is provided on the rear sealing ring 101. The arrangement of the deep groove ball bearing 1011 and the rear cover 1012 can cooperate with the rear sealing ring 101 to provide the collar 1 with a waterproof and dustproof effect. The arrangement of the wave pipe joint 102 can transport the cooling liquid to the cooling tank 301 through an external pipeline, thereby completing the cooling effect on the internal components of the collar 1.

[0049] Specifically, a first circulation cavity 103 and a second circulation cavity 104 are opened in the sleeve ring 1, a straight external threaded joint A1031 connected to the first circulation cavity 103 is provided on the rear sealing ring 101, and a straight external threaded joint B1041 connected to the second circulation cavity 104 is provided on the rear sealing ring 101. The setting of the first circulation cavity 103 and the second circulation cavity 104 can discharge the cooling liquid passed into the cooling groove 301, so that the cooling liquid in the cooling groove 301 has a circulation channel.

[0050] Specifically, the collar 1 is provided with a drainage hole 4 for connecting the first circulation cavity 103 and the second circulation cavity 104, and the end of the drainage hole 4 is connected to the inside of the collar 1. The opening of the drainage hole 4 can discharge the circulating coolant inside the first circulation cavity 103 and the second circulation cavity 104, and can quickly and directly discharge the circulating cooling liquid in the cooling tank 301.

[0051] For other structures not described, refer to Example 1.

[0052] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0053] In the present invention, unless otherwise clearly specified and limited, the terms "set", "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0054] The control method of the present invention is automatic control through a controller. The control circuit of the controller can be implemented by simple programming by technicians in this field. The provision of power is also common knowledge in this field. The present invention is mainly used to protect mechanical devices, so the present invention will no longer explain the control method and circuit connection in detail.

[0055] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An internal grinding tool for a grinding machine, comprising a driving structure (100) and a mechanical structure (200), characterized in that: The driving structure (100) comprises a collar (1), a rear sealing ring (101) is provided on the collar (1), a water ring (3) is provided inside the collar (1), a motor stator (31) is provided inside the water ring (3), a motor rotor (32) is provided inside the motor stator (31), and a connecting rod (33) is provided inside the motor rotor (32); The water ring (3) is provided with a cooling groove (301), and the water ring (3) is also provided with a notch (302); the cooling groove (301) is provided to form a cavity for liquid circulation between the water ring (3) and the sleeve ring (1), so that the liquid can circulate inside the cooling groove (301), and the notch (302) is provided to allow liquid to circulate between adjacent cooling grooves (301); the two ends of the water ring (3) are sealed with the sleeve ring (1) through a sealing ring, and the number of cooling grooves (301) is four; The mechanical structure (200) comprises a sleeve (2) spliced ​​with a collar (1), wherein a core shaft (21) is arranged in the sleeve (2) and is assembled with a connecting rod (33); The two ends of the core shaft (21) are respectively provided with a middle spacer ring (5) and a rear spacer ring (6); the two ends of the middle spacer ring (5) are provided with a ball bearing A (51) which is fitted with the sleeve (2); the two ends of the rear spacer ring (6) are provided with a ball bearing B (61) which is fitted with the sleeve (2); The ends of both ends of the core shaft (21) are respectively provided with a front spacer ring (52) and a rear nut (62), and the end of the sleeve (2) is provided with a front nut (7) for providing a mounting function for the core shaft (21); The core shaft (21) is provided with a flange assembly (8), and a grinding wheel (9) is fixedly mounted on the flange assembly (8) via a flange pressure screw (81); The end of the mandrel (21) is provided with an embedded groove (2101), a docking flat key (211) is provided in the embedded groove (2101), and the inner side of the end of the connecting rod (33) is provided with a key groove (331) that is fitted and matched with the docking flat key (211); The rear sealing ring (101) is provided with a deep groove ball bearing (1011), the end of the connecting rod (33) is provided with a rear cover (1012), and the rear sealing ring (101) is provided with a corrugated pipe joint (102) communicating with the inner cavity of the sleeve ring (1); The sleeve ring (1) is provided with a first circulation cavity (103) and a second circulation cavity (104); the rear sealing ring (101) is provided with a straight external thread joint A (1031) connected to the first circulation cavity (103); and the rear sealing ring (101) is provided with a straight external thread joint B (1041) connected to the second circulation cavity (104); The collar (1) is provided with a drainage hole (4) for connecting the first circulation cavity (103) and the second circulation cavity (104); the end of the drainage hole (4) is connected to the interior of the collar (1); the opening of the drainage hole (4) can discharge the circulating cooling liquid in the first circulation cavity (103) and the second circulation cavity (104), and can quickly and directly discharge the circulating cooling liquid in the cooling groove (301).

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