A sealing structure of a grinding wheel spindle of a grinding machine

Abstract

The utility model discloses a kind of sealing structures of grinder grinding wheel spindle, it is related to grinding machine technical field, including mounting bracket, main shaft is rotationally equipped in the mounting bracket, grinding wheel body is inserted and connected and equipped on the main shaft, both sides of the grinding wheel body are equipped with backing plate, metal sealing ring is abutted and equipped with backing plate top surface, the top end of the main shaft is fixedly equipped with clamping rod, fixed sleeve is inserted and connected and equipped with the outer wall of clamping rod, installation groove is opened in the inboard of fixed sleeve, the installation groove is equipped with multiple groups and inboard is rotationally equipped with clamping block, clamping groove is opened in the outer wall of clamping rod, the clamping groove is equipped with multiple groups and respectively with multiple clamping blocks clamping, push ring is slidably equipped with the inboard of fixed sleeve, sliding sleeve is fixedly equipped with the outer wall of push ring, oblique arc rod is fixedly equipped with the outer wall of sliding sleeve, rotating sleeve is rotationally equipped with the outer wall of fixed sleeve, without loosening fastener one by one can quickly disassemble grinding wheel, simultaneously, multiple sealing protections are formed by backing plate and metal sealing ring, effectively prevent grinding fluid and dust from invading inside main shaft.

Description

Technical Field

[0001] This utility model relates to the field of grinding machine technology, and more specifically, to a sealing structure for a grinding wheel spindle. Background Technology

[0002] In grinding operations, grinding wheels need to be changed frequently to meet the processing requirements of different workpieces. Traditional grinding wheel installation methods often use nut locking or flange clamping structures. During installation, tools such as wrenches are needed to tighten the fasteners one by one, and during disassembly, tools are needed to loosen them one by one. The operation steps are cumbersome and time-consuming. Especially in batch processing where grinding wheels need to be changed frequently, it seriously affects production efficiency. At the same time, traditional fastening methods cannot guarantee that the preload force is consistent for each installation. Insufficient locking force can easily cause the grinding wheel to loosen, or excessive locking force can damage the grinding wheel.

[0003] During the high-speed operation of a grinding machine, the spindle drives the grinding wheel to rotate at high speed, generating significant centrifugal force and vibration. Traditional locking structures are prone to loosening of fasteners after prolonged operation. Furthermore, dust and grinding fluid generated during grinding can easily penetrate the spindle, causing bearing corrosion and wear. Traditional sealing structures often use a single rubber sealing ring for sealing, which is prone to aging and failure under high-temperature and high-speed conditions, leading to a decline in sealing performance. They also lack the function of axial pre-tightening and multiple sealing protection for the grinding wheel. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] In view of the problems existing in the prior art, this utility model provides a sealing structure for the spindle of a grinding wheel in a grinding machine to solve the technical problems mentioned in the background art.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this utility model provides the following technical solution: a sealing structure for a grinding wheel spindle of a grinding machine, comprising a mounting bracket, a spindle rotatably mounted within the mounting bracket, a grinding wheel body inserted into the spindle, pads on both sides of the grinding wheel body, a metal sealing ring abutting against the top surface of the pads, a snap-fit ​​rod fixedly mounted at the top of the spindle, a fixing sleeve inserted into the outer wall of the snap-fit ​​rod, an installation groove formed on the inner side of the fixing sleeve, multiple sets of installation grooves, each with a snap-fit ​​block rotatably mounted on its inner side, a snap-fit ​​groove formed on the outer wall of the snap-fit ​​rod, multiple sets of snap-fit ​​grooves engaging with multiple sets of snap-fit ​​blocks, a push ring slidably mounted on the inner side of the fixing sleeve, a sliding sleeve fixedly mounted on the outer wall of the push ring, a slanted arc rod fixedly mounted on the outer wall of the sliding sleeve, a rotating sleeve rotatably mounted on the outer wall of the fixing sleeve, a rotating rod fixedly mounted on the bottom surface of the rotating sleeve, multiple sets of rotating rods, each with a mating hole on its outer wall, and multiple sets of slanted arc rods slidably connected to multiple sets of mating holes.

[0008] The present invention is further configured such that a push spring is connected between the outer wall of each of the multiple sets of card blocks and the mounting groove. The push spring is configured in multiple sets, and the elastic potential energy of the push spring pushes the card block to automatically engage in the card groove to complete the locking. When unlocking, it provides a reset function to ensure that the card block can be stably engaged.

[0009] The present invention is further configured such that the outer wall of the fixed sleeve is provided with a sliding groove, and multiple sets of sliding grooves are provided, all of which are slidably connected to the sliding sleeve. The sliding groove guides and limits the up and down sliding of the sliding sleeve to ensure the stability of the sliding sleeve's movement trajectory, thereby ensuring that the push ring can accurately push the card block to complete the unlocking action.

[0010] The present invention is further configured such that a positioning sleeve is fixedly provided on the top surface of the rotating sleeve, and a positioning hole is provided on the outer wall of the positioning sleeve. Multiple sets of positioning holes are provided, and the multi-angle positioning and locking of the rotating sleeve can be achieved by cooperating with the positioning block through multiple sets of positioning holes, so as to facilitate the adjustment and fixing of the position of the rotating sleeve.

[0011] The present invention is further configured such that an installation ring is fixedly provided on the outer wall of the fixed sleeve, and an installation block is fixedly provided on the bottom surface of the installation ring. The installation block is provided in multiple sets, and each set of the installation block is connected to a compression spring on its outer wall. Each set of the compression springs is connected to a positioning block at its top. The positioning blocks are respectively abutted in the positioning holes. The positioning blocks are automatically pushed into the positioning holes by the compression springs to lock the position of the rotating sleeve and prevent accidental rotation during operation, which could cause the grinding wheel to loosen.

[0012] The present invention is further configured such that each of the multiple sets of mounting blocks has a sliding hole, and the multiple sets of positioning blocks are slidably connected to the multiple sets of sliding holes. The sliding holes guide and limit the movement direction of the positioning blocks to ensure that the positioning blocks can accurately spring into the positioning holes to complete the locking.

[0013] The present invention is further configured such that a compression spring is connected to the inner side of the fixed sleeve, and a compression block is fixed at the bottom end of the compression spring. The compression spring pushes the compression block to apply a stable axial preload to the grinding wheel body to ensure that the grinding wheel remains firmly installed during high-speed rotation.

[0014] The present invention is further configured such that a guide plate is fixedly provided on the inner side of the push ring, and a guide groove is provided on the outer wall of the snap-fit ​​rod. Multiple sets of guide plates and guide grooves are provided. The guide plate slides along the guide groove to guide the insertion direction of the fixed sleeve, ensuring that the snap-fit ​​block and the snap-fit ​​groove can be accurately aligned during installation.

[0015] (III) Beneficial Effects

[0016] Compared with the prior art, this utility model provides a sealing structure for the spindle of a grinding wheel, which has the following beneficial effects:

[0017] 1. This device achieves automatic locking of the grinding wheel by setting multiple sets of mounting slots on the inner side of the fixed sleeve and cooperating with push springs and locking blocks. When the fixed sleeve is inserted into the locking rod, the locking blocks automatically engage with the slots under the action of the push spring to complete the locking. The entire installation process does not require any tools and the push spring can provide a consistent locking force, avoiding the loosening or damage of the grinding wheel due to uneven tightening force by manual tightening, and greatly improving the grinding wheel replacement efficiency.

[0018] 2. This device achieves unlocking with a single rotation operation through the linkage of the rotating sleeve, the inclined arc rod, and the sliding sleeve. The rotating sleeve converts the rotational motion into linear sliding motion of the sliding sleeve through the sliding hole and the inclined arc rod, pushing the push ring to disengage the locking block from the slot. The grinding wheel can be quickly disassembled without loosening the fasteners one by one. At the same time, the pad and the metal sealing ring form a multi-layer sealing protection to effectively prevent grinding fluid and dust from entering the spindle.

[0019] 3. This device achieves automatic position locking of the rotating sleeve by using the positioning block on the mounting ring in conjunction with the positioning hole of the compression spring and the positioning sleeve. This effectively prevents the rotating sleeve from accidentally rotating due to vibration during high-speed operation, which could cause the grinding wheel to loosen. At the same time, the compression spring pushes the compression block to apply a stable axial preload to the grinding wheel body, ensuring that the grinding wheel remains firmly installed when rotating at high speed. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of a sealing structure for a grinding wheel spindle in this utility model;

[0021] Figure 2 This is a structural diagram of the fixed sleeve in the unlocked state in this utility model;

[0022] Figure 3 This is a cross-sectional view of the fixing sleeve and the snap-fit ​​rod in this utility model;

[0023] Figure 4 This is a schematic diagram of the structure of the rotating sleeve and the sliding sleeve in this utility model;

[0024] Figure 5 This is a cross-sectional view of the mounting ring and positioning sleeve in this utility model.

[0025] In the diagram: 1. Mounting bracket; 2. Spindle; 3. Grinding wheel body; 4. Pad plate; 5. Metal sealing ring; 6. Snap-fit ​​rod; 7. Fixing sleeve; 8. Mounting groove; 9. Snap block; 10. Snap groove; 11. Push ring; 12. Sliding sleeve; 13. Inclined arc rod; 14. Rotating sleeve; 15. Rotating rod; 16. Mating hole; 17. Push spring; 18. Sliding groove; 19. Positioning sleeve; 20. Positioning hole; 21. Mounting ring; 22. Mounting block; 23. Compression spring; 24. Positioning block; 25. Sliding hole; 26. Extrusion spring; 27. Extrusion block; 28. Guide plate; 29. ​​Guide groove. Detailed Implementation

[0026] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0027] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0028] In this utility model, unless otherwise stated, the orientations used, such as "up" and "down", usually refer to the direction shown in the accompanying drawings, or to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" usually refer to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0029] Please see Figures 1-5 A sealing structure for a grinding wheel spindle of a grinding machine includes a mounting bracket 1, a spindle 2 rotatably mounted inside the mounting bracket 1, a grinding wheel body 3 inserted into the spindle 2, pads 4 on both sides of the grinding wheel body 3, a metal sealing ring 5 abutting against the top surface of the pads 4, a snap-fit ​​rod 6 fixedly mounted at the top of the spindle 2, a fixing sleeve 7 inserted into the outer wall of the snap-fit ​​rod 6, an installation groove 8 on the inner side of the fixing sleeve 7, multiple sets of snap-fit ​​blocks 9 rotatably mounted in the installation groove 8, and a sealing structure for the outer wall of the snap-fit ​​rod 6. The slot 10 has multiple sets and engages with multiple sets of locking blocks 9. The inner side of the fixed sleeve 7 is provided with a push ring 11. The outer wall of the push ring 11 is fixed with a sliding sleeve 12. The outer wall of the sliding sleeve 12 is fixed with a slanted arc rod 13. The outer wall of the fixed sleeve 7 is rotatably provided with a rotating sleeve 14. The bottom surface of the rotating sleeve 14 is fixed with a rotating rod 15. Multiple sets of rotating rods 15 are provided and each has a mating hole 16 on its outer wall. Multiple sets of slanted arc rods 13 are provided and are slidably connected to multiple sets of mating holes 16.

[0030] In this embodiment, during grinding wheel installation, the grinding wheel body 3 is first inserted and fitted onto the rotating spindle 2 within the mounting bracket 1. The pads 4 on both sides of the grinding wheel body 3 abut against it, and the metal sealing ring 5 on the top surface of the pad 4 seals the connection between the spindle 2 and the grinding wheel body 3 to prevent grinding fluid and dust from entering the spindle 2. Then, the fixing sleeve 7 is aligned with the snap-fit ​​rod 6 at the top of the spindle 2 and inserted downwards. During insertion, the outer wall of the snap-fit ​​rod 6 pushes multiple sets of snap blocks 9 within the mounting groove 8 on the inner side of the fixing sleeve 7 to rotate outwards and compress the push spring 17. Once the fixing sleeve 7 is in place, the push spring 17 releases its elastic potential energy, causing the multiple sets of snap blocks 9 to automatically snap into the corresponding slots 10 on the outer wall of the snap-fit ​​rod 6, completing the locking process. The guide plate 28 slides along the guide groove 29 on the outer wall of the snap-fit ​​rod 6 to guide the insertion direction of the fixing sleeve 7, ensuring accurate installation. The compression spring 26 inside the fixed sleeve 7 pushes the compression block 27 downward to press the grinding wheel body 3, applying axial preload to ensure that the grinding wheel is firmly installed. At the same time, the positioning block 24, which is slidably set in the mounting block 22 on the mounting ring 21 on the outer wall of the fixed sleeve 7, automatically springs into the positioning hole 20 on the outer wall of the positioning sleeve 19 on the top surface of the rotating sleeve 14 under the action of the compression spring 23, locking the position of the rotating sleeve 14 to prevent accidental rotation during operation, which would cause the grinding wheel to loosen.

[0031] Please see Figures 3-5 As a further implementation of the overall equipment: multiple sets of push springs 17 are provided between the outer wall of the multiple sets of card blocks 9 and the mounting groove 8.

[0032] The outer wall of the fixed sleeve 7 is provided with a sliding groove 18, and multiple sets of sliding grooves 18 are provided, all of which are slidably connected to the sliding sleeve 12.

[0033] A positioning sleeve 19 is fixedly provided on the top surface of the rotating sleeve 14. The outer wall of the positioning sleeve 19 is provided with positioning holes 20, and multiple sets of positioning holes 20 are provided.

[0034] The outer wall of the fixed sleeve 7 is fixedly provided with an installation ring 21, and the bottom surface of the installation ring 21 is fixedly provided with an installation block 22. Multiple sets of installation blocks 22 are provided, and each set of the outer wall is connected with a compression spring 23. The top of each set of compression springs 23 is connected with a positioning block 24, and the multiple sets of positioning blocks 24 abut against the multiple sets of positioning holes 20 respectively.

[0035] Each of the multiple sets of mounting blocks 22 has a sliding hole 25, and the multiple sets of positioning blocks 24 are slidably connected to the multiple sets of positioning blocks 24 respectively.

[0036] A compression spring 26 is connected to the inner side of the fixed sleeve 7, and a compression block 27 is fixedly provided at the bottom end of the compression spring 26.

[0037] A guide plate 28 is fixedly provided on the inner side of the push ring 11, and a guide groove 29 is provided on the outer wall of the snap rod 6. Multiple sets of guide plates 28 and guide grooves 29 are provided.

[0038] More specifically, rotating the rotating sleeve 14 causes the positioning sleeve 19 to rotate, pushing the positioning block 24 to slide into the sliding hole 25 through multiple sets of positioning holes 20 and squeezing the compression spring 23, causing the multiple sets of positioning blocks 24 to disengage from the positioning holes 20. The rotating sleeve 14 drives multiple sets of rotating rods 15 fixed on its bottom surface to rotate synchronously. The mating hole 16 on the outer wall of the rotating rod 15 slides with the inclined arc rod 13 on the outer wall of the sliding sleeve 12. The rotational motion of the rotating sleeve 14 is converted into the sliding of the sliding sleeve 12 along the straight upward sliding groove 18 on the outer wall of the fixed sleeve 7 through the inclined arc trajectory of the inclined arc rod 13. The sliding sleeve 12 drives the push ring 11 to move upward synchronously. The push ring 11 pushes the multiple sets of locking blocks 9 in the mounting groove 8 on the inner side of the fixed sleeve 7 to rotate along the mounting groove 8 and compress the push spring 17, causing the multiple sets of locking blocks 9 to disengage from the locking groove 10 on the outer wall of the locking rod 6 and release the locking state. At this point, lifting the retaining sleeve 7 upwards will remove it from the snap-fit ​​rod 6. The compression spring 26 and the compression block 27 will be removed together with the retaining sleeve 7 to release the axial compression on the grinding wheel. Then, the grinding wheel body 3 can be removed from the spindle 2 to complete the disassembly. After replacing the new grinding wheel, the above installation process can be repeated.

[0039] In summary, during the use or operation of the overall equipment: When installing the grinding wheel, first insert the grinding wheel body 3 onto the rotating spindle 2 inside the mounting bracket 1. The pads 4 on both sides of the grinding wheel body 3 abut against it. The metal sealing ring 5 on the top surface of the pad 4 seals the connection between the spindle 2 and the grinding wheel body 3 to prevent grinding fluid and dust from entering the spindle 2. Then, align the fixing sleeve 7 with the snap-fit ​​rod 6 at the top of the spindle 2 and insert it downwards. During the insertion process, the outer wall of the snap-fit ​​rod 6 pushes the multiple sets of snap blocks 9 in the mounting groove 8 inside the fixing sleeve 7 to rotate outwards and compress the push spring 17. After the fixing sleeve 7 is inserted into place, the push spring 17 releases its elastic potential energy to push the multiple sets of snap blocks 9 to automatically snap into the multiple sets of snap slots 10 on the outer wall of the snap-fit ​​rod 6 to complete the locking. The guide plate 28 slides along the guide groove 29 on the outer wall of the snap-fit ​​rod 6 to guide the insertion direction of the fixing sleeve 7 to ensure accurate installation. The compression spring 26 inside the fixed sleeve 7 pushes the compression block 27 downward to press the grinding wheel body 3, applying axial preload to ensure that the grinding wheel is firmly installed. At the same time, the positioning block 24, which is slidably set in the mounting block 22 on the mounting ring 21 on the outer wall of the fixed sleeve 7, automatically springs into the positioning hole 20 on the outer wall of the positioning sleeve 19 on the top surface of the rotating sleeve 14 under the action of the compression spring 23, locking the position of the rotating sleeve 14 to prevent accidental rotation during operation, which would cause the grinding wheel to loosen.

[0040] Rotating the rotating sleeve 14 causes the positioning sleeve 19 to rotate, pushing the positioning block 24 to slide into the sliding hole 25 through multiple sets of positioning holes 20 and squeezing the compression spring 23, causing the multiple sets of positioning blocks 24 to disengage from the positioning holes 20. The rotating sleeve 14 drives multiple sets of rotating rods 15 fixed on its bottom surface to rotate synchronously. The mating hole 16 on the outer wall of the rotating rod 15 slides with the inclined arc rod 13 on the outer wall of the sliding sleeve 12. The rotational motion of the rotating sleeve 14 is converted into the sliding of the sliding sleeve 12 along the straight upward sliding groove 18 on the outer wall of the fixed sleeve 7 through the inclined arc trajectory of the inclined arc rod 13. The sliding sleeve 12 drives the push ring 11 to move upward synchronously. The push ring 11 pushes the multiple sets of locking blocks 9 in the mounting groove 8 on the inner side of the fixed sleeve 7 to rotate along the mounting groove 8 and compress the push spring 17, causing the multiple sets of locking blocks 9 to disengage from the locking groove 10 on the outer wall of the locking rod 6 and release the locking state. At this point, lifting the retaining sleeve 7 upwards will remove it from the snap-fit ​​rod 6. The compression spring 26 and the compression block 27 will be removed together with the retaining sleeve 7 to release the axial compression on the grinding wheel. Then, the grinding wheel body 3 can be removed from the spindle 2 to complete the disassembly. After replacing the new grinding wheel, the above installation process can be repeated.

[0041] Of all the solutions mentioned above, those involving connections between two components can be selected based on the actual situation, such as welding, bolt and nut connection, bolt or screw connection, or other well-known connection methods. These will not be elaborated on here. For all the fixed connections mentioned above, welding is the preferred option.

[0042] In all the solutions mentioned above, the operation of electrical components, unless otherwise specified, is controlled by a controller. Since the devices matched with the controllers are common devices, their control principles and wiring connections are existing, well-known, and mature technologies, and their specific circuit structures will not be described in detail here. The specific models and specifications of the electrical components involved in this solution need to be selected and determined according to the actual specifications of the device. The specific selection and calculation methods adopt existing technologies in this field, and therefore will not be described in detail.

[0043] Of all the solutions mentioned above, those involving motors can be combined with reducers if necessary. The connection structure and working principle between the motor and the reducer are existing known technologies and will not be described in detail in this utility model.

[0044] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A sealing structure for a grinding wheel spindle, comprising a mounting bracket (1), characterized in that: The mounting bracket (1) has a rotating spindle (2) inside, and a grinding wheel body (3) is inserted into the spindle (2). Both sides of the grinding wheel body (3) have pads (4). The top surface of the pads (4) abuts against a metal sealing ring (5). A snap-fit ​​rod (6) is fixedly installed at the top of the spindle (2). A fixing sleeve (7) is inserted into the outer wall of the snap-fit ​​rod (6). An installation groove (8) is opened inside the fixing sleeve (7). The installation groove (8) has multiple sets of snap-fit ​​blocks (9) rotatably mounted inside each. A snap-fit ​​slot (10) is opened on the outer wall of the snap-fit ​​rod (6). The groove (10) is provided with multiple sets and engages with multiple sets of locking blocks (9). The inner side of the fixed sleeve (7) is provided with a push ring (11). The outer wall of the push ring (11) is fixed with a sliding sleeve (12). The outer wall of the sliding sleeve (12) is fixed with a slanted arc rod (13). The outer wall of the fixed sleeve (7) is rotatably provided with a rotating sleeve (14). The bottom surface of the rotating sleeve (14) is fixed with a rotating rod (15). The rotating rod (15) is provided with multiple sets and each of them has a mating hole (16) on its outer wall. The slanted arc rod (13) is provided with multiple sets and is slidably connected to multiple sets of mating holes (16).

2. The sealing structure for a grinding wheel spindle according to claim 1, characterized in that: multiple sets of... Push springs (17) are provided between the outer wall of the card block (9) and the mounting groove (8), and multiple sets of push springs (17) are provided.

3. The sealing structure for a grinding wheel spindle according to claim 2, characterized in that: The outer wall of the fixed sleeve (7) is provided with a sliding groove (18), and the sliding groove (18) is provided in multiple sets and is slidably connected to the sliding sleeve (12).

4. The sealing structure for a grinding wheel spindle according to claim 3, characterized in that: The rotating sleeve (14) is fixedly provided with a positioning sleeve (19) on its top surface. The positioning sleeve (19) has a positioning hole (20) on its outer wall. The positioning hole (20) is provided in multiple sets.

5. The sealing structure for a grinding wheel spindle according to claim 4, characterized in that: The outer wall of the fixed sleeve (7) is fixedly provided with an installation ring (21), and the bottom surface of the installation ring (21) is fixedly provided with an installation block (22). The installation block (22) is provided with multiple sets and each of the outer walls is connected with a compression spring (23). The top of each of the multiple sets of compression springs (23) is connected with a positioning block (24), and the multiple sets of positioning blocks (24) respectively abut against the multiple sets of positioning holes (20).

6. The sealing structure for a grinding wheel spindle according to claim 5, characterized in that: multiple sets of... Each of the mounting blocks (22) has a sliding hole (25), and the multiple sets of positioning blocks (24) are slidably connected to the multiple sets of positioning blocks (24).

7. The sealing structure for a grinding wheel spindle according to claim 6, characterized in that: A compression spring (26) is connected to the inner side of the fixed sleeve (7), and a compression block (27) is fixed at the bottom end of the compression spring (26).

8. The sealing structure for a grinding wheel spindle according to claim 7, characterized in that: The inner side of the push ring (11) is fixedly provided with a guide plate (28), and the outer wall of the snap rod (6) is provided with a guide groove (29). Both the guide plate (28) and the guide groove (29) are provided with multiple sets.

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