Double-grinding-wheel spindle structure

Abstract

The utility model discloses a double-grinding-wheel main shaft structure, which belongs to the technical field of grinding equipment and comprises a shaft body, a positioning shaft section with the diameter smaller than that of the shaft body is arranged at one end of the shaft body; the sleeve sleeves the positioning shaft section, and a locking nut is mounted at one end, extending out of the sleeve, of the positioning shaft section in a threaded manner; the two grinding wheel positioning assemblies are symmetrically arranged at the two ends of the sleeve, each grinding wheel positioning assembly comprises a positioning sleeve and a locking sleeve, the positioning sleeves are arranged on the sleeves in a sleeving mode, the locking sleeves are arranged on the sleeves in a sleeving mode, and the locking sleeves are matched with the positioning sleeves to clamp grinding wheels to be fixed. The positioning shaft section and the sleeve are designed at one end of the shaft body, two grinding wheels can be respectively fixed at two ends of the sleeve through the two grinding wheel positioning components, and then the sleeve is fixed on the positioning shaft section, so that the two grinding wheels can be fixedly mounted on the shaft body, and a rough grinding wheel and a fine grinding wheel can be simultaneously mounted on the grinding equipment; the practicability of the equipment is improved, and a user does not need to frequently replace a grinding wheel or purchase multiple grinding equipment.

Description

Technical Field

[0001] This utility model relates to the field of grinding equipment technology, specifically to a dual grinding wheel spindle structure. Background Technology

[0002] Grinding wheels are common grinding tools, mounted on the shaft of a motor. Currently, conventional motors typically only allow one grinding wheel to be installed. However, to improve processing efficiency, workpieces are often first rough-ground and then fine-ground. Different grinding wheels are used for rough and fine grinding, which necessitates changing grinding wheels during processing or using two grinding machines, resulting in higher equipment costs. Utility Model Content

[0003] To address the aforementioned technical shortcomings, the purpose of this utility model is to provide a dual-grinding-wheel spindle structure that allows two grinding wheels to be mounted on the spindle.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: The present invention provides a dual grinding wheel spindle structure, comprising:

[0005] A shaft body, one end of which is provided with a positioning shaft section with a diameter smaller than the diameter of the shaft body;

[0006] A sleeve is fitted onto a positioning shaft section, and a locking nut is threaded onto one end of the positioning shaft section that extends out of the sleeve.

[0007] Two grinding wheel positioning components are symmetrically arranged at both ends of the sleeve. Each grinding wheel positioning component includes a positioning sleeve and a locking sleeve. The positioning sleeve is fitted onto the sleeve, and the locking sleeve is fitted onto the sleeve. The locking sleeve cooperates with the positioning sleeve to clamp the grinding wheel to be fixed.

[0008] Preferably, both ends of the sleeve are provided with a threaded portion and a tapered portion, the threaded portion is located on the side of the tapered portion away from the middle of the sleeve, and the inner wall of the positioning sleeve is a tapered surface that mates with the tapered portion.

[0009] Preferably, the locking sleeve is threadedly engaged with the threaded portion, and a limiting hole is provided on the locking sleeve.

[0010] Preferably, the positioning sleeve includes a cylindrical body and a limiting protrusion fixed on the outer wall of the cylindrical body, and the grinding wheel is sleeved on the cylindrical body and abuts against one side of the limiting protrusion.

[0011] Preferably, the positioning shaft segment is provided with multiple key bars, and the inner wall of the sleeve is provided with keyways that mate with the key bars.

[0012] Preferably, a tapered transition is provided at the intersection of the shaft body and the positioning shaft section, and one end of the sleeve is provided with a flared opening that mates with the tapered transition.

[0013] The beneficial effects of this utility model are as follows:

[0014] This invention features a positioning shaft section and a sleeve at one end of the shaft. Two grinding wheels can be fixed to either end of the sleeve using two grinding wheel positioning components. The sleeve is then fixed to the positioning shaft section, allowing two grinding wheels to be fixedly mounted on the shaft. This enables the grinding equipment to simultaneously mount both coarse and fine grinding wheels, improving its practicality and eliminating the need for frequent grinding wheel replacements or the purchase of multiple grinding machines. The keyway and keyway, along with the tapered transition and flared opening, significantly improve the installation accuracy of the sleeve on the shaft, ensuring the stability of the grinding wheels during operation and contributing to improved machining precision. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a perspective view of a dual grinding wheel spindle structure provided for an embodiment of the present utility model.

[0017] Figure 2 This is a top view of a dual grinding wheel spindle structure provided in an embodiment of the present utility model.

[0018] Figure 3 for Figure 2 Sectional view at point AA.

[0019] Figure 4 This is a perspective view of the shaft of this utility model.

[0020] Figure 5 This is a perspective view of the sleeve of this utility model.

[0021] Explanation of reference numerals in the attached figures:

[0022] 1. Shaft body, 2. Positioning shaft section, 3. Sleeve, 4. Locking nut, 5. Positioning sleeve, 6. Locking sleeve, 7. Threaded part, 8. Tapered part, 9. Tapered surface, 10. Limiting hole, 11. Cylinder body, 12. Limiting protrusion, 13. Key bar, 14. Keyway, 15. Tapered transition, 16. Bell mouth, 17. Grinding wheel. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Example 1:

[0025] like Figures 1 to 5 As shown, Embodiment 1 of this utility model provides a double grinding wheel 17 spindle structure. First, a spindle body 1 is prepared, the length and diameter of which are designed according to the actual equipment requirements. A positioning shaft section 2 with a diameter smaller than the diameter of the spindle body 1 is designed at the working end of the spindle body 1, making the spindle body 1 and the positioning shaft section 2 as a whole stepped. A sleeve 3 is fitted on the positioning shaft section 2. To ensure that the sleeve 3 and the positioning shaft section 2 are firmly connected and coaxial, multiple key strips 13 are evenly fixed on the circumferential side of the positioning shaft section 2. Correspondingly, multiple keyways 14 are opened on the inner wall of the sleeve 3 to slide with the key strips 13. Through the cooperation of the key strips 13 and the keyways 14, the spindle body 1 can stably rotate with the sleeve 3 when rotating, avoiding slippage of the sleeve 3. At the same time, as Figure 4 and Figure 5 As shown, a tapered transition 15 is provided at the intersection of the shaft 1 and the positioning shaft section 2. One end of the sleeve 3 is provided with a flared opening 16 that mates with the tapered transition 15. This design makes it easier to align the sleeve 3 during installation and ensures a tighter connection. After the sleeve 3 is installed, a locking nut 4 is threaded onto the end of the positioning shaft section 2 that extends out of the sleeve 3. The locking nut 4 can tighten the sleeve 3 to prevent axial displacement during use. At the same time, it ensures that the flared opening 16 of the sleeve 3 fits tightly with the tapered transition 15, automatically centering the sleeve and ensuring the coaxiality of the sleeve 3 and the shaft 1.

[0026] Two grinding wheels 17 can be mounted on the shaft 1 using two grinding wheel 17 positioning assemblies at each end of the sleeve 3. These two grinding wheel 17 positioning assemblies are symmetrically arranged at both ends of the sleeve 3. Figure 3 As shown, each positioning assembly of the grinding wheel 17 includes a positioning sleeve 5 and a locking sleeve 6. The positioning sleeve 5 includes a cylindrical body 11 and a limiting protrusion 12 fixed to the outer wall of the cylindrical body 11. The sleeve 3 has a variable diameter. First, the cylindrical body 11 of the positioning sleeve 5 is fitted onto the sleeve 3, with one end abutting against the intersection of the variable diameter of the sleeve 3. The grinding wheel 17 is then fitted onto the cylindrical body 11, abutting against one side of the limiting protrusion 12. Then, the locking sleeve 6 is threaded onto the threaded portion 7 at the end of the sleeve 3, so that the locking sleeve 6 abuts against the grinding wheel 17. In this way, the axial position of the grinding wheel 17 can be limited by the clamping of the locking sleeve 6 and the positioning sleeve 5.

[0027] In use, first place the two positioning sleeves 5 on both ends of the sleeve 3, then place the grinding wheel 17 on the two cylinders 11, and thread the locking sleeve 6 to fix the grinding wheel 17 on the sleeve 3. Then place the sleeve 3 on the positioning shaft section 2, and use the locking nut 4 to fix the sleeve 3 on the positioning shaft section 2, thus completing the installation of the double grinding wheel 17 on the shaft 1.

[0028] Example 2:

[0029] Based on Embodiment 1, in order to improve the installation accuracy of the grinding wheel 17, this utility model provides a tapered portion 8 inside the threaded portion 7 of the sleeve 3, and designs the inner wall of the cylinder 11 as a tapered surface 9 that mates with the tapered portion 8. In this way, when the locking sleeve 6 is fitted onto the sleeve 3, since the locking sleeve 6 is threadedly engaged with the threaded portion 7, as the locking sleeve 6 is screwed in, it pushes the grinding wheel 17 and the positioning sleeve 5 to move, so that the tapered surface 9 is tightly attached to the tapered portion 8, achieving automatic centering, improving the coaxiality of the positioning sleeve 5 and the sleeve 3, and thus improving the installation accuracy of the grinding wheel 17.

[0030] Example 3:

[0031] Based on Embodiment 1 and Embodiment 2, this utility model also provides a plurality of limiting holes 10 on the locking sleeve 6 for use with an adjusting wrench. The adjusting wrench is fixed with two protrusions that cooperate with the limiting holes 10. After inserting the protrusions into the limiting holes 10, the locking sleeve 6 can be rotated using the adjusting wrench.

[0032] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A dual-grinding-wheel spindle structure, characterized in that, include: Shaft (1), one end of which is provided with a positioning shaft segment (2) with a diameter smaller than that of the shaft (1); Sleeve (3), the sleeve (3) is sleeved on the positioning shaft section (2), and a locking nut (4) is threaded on one end of the positioning shaft section (2) that extends out of the sleeve (3); Two grinding wheel (17) positioning components are symmetrically arranged at both ends of the sleeve (3). The grinding wheel (17) positioning components include a positioning sleeve (5) and a locking sleeve (6). The positioning sleeve (5) is fitted on the sleeve (3), and the locking sleeve (6) is fitted on the sleeve (3). The locking sleeve (6) cooperates with the positioning sleeve (5) to clamp the grinding wheel (17) to be fixed.

2. The dual grinding wheel spindle structure as described in claim 1, characterized in that, Both ends of the sleeve (3) are provided with threaded portions (7) and tapered portions (8). The threaded portions (7) are located on the side of the tapered portions (8) away from the middle of the sleeve (3). The inner wall of the positioning sleeve (5) is a tapered surface (9) that mates with the tapered portions (8).

3. The dual grinding wheel spindle structure as described in claim 2, characterized in that, The locking sleeve (6) is threadedly engaged with the threaded part (7), and a limit hole (10) is provided on the locking sleeve (6).

4. The dual grinding wheel spindle structure as described in claim 1, characterized in that, The positioning sleeve (5) includes a cylinder (11) and a limiting protrusion (12) fixed on the outer wall of the cylinder (11). The grinding wheel (17) is sleeved on the cylinder (11) and abuts against one side of the limiting protrusion (12).

5. The dual grinding wheel spindle structure as described in claim 1, characterized in that, The positioning shaft section (2) is provided with multiple key bars (13), and the inner wall of the sleeve (3) is provided with key grooves (14) that cooperate with the key bars (13).

6. The dual grinding wheel spindle structure as described in claim 1, characterized in that, A tapered transition (15) is provided at the intersection of the shaft (1) and the positioning shaft section (2), and a flared mouth (16) that cooperates with the tapered transition (15) is provided at one end of the sleeve (3).

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