A high-speed internal grinding spindle
By setting up bearing components and ring plate reinforcement structures in the high-speed internal grinding spindle, the problems of vibration and fracture during high-speed rotation are solved, and higher grinding accuracy and service life are achieved.
Patent Information
- Application Number
- CN202421280144.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-06
- Publication Date
- 2025-04-08
- Estimated Expiration
- 2034-06-06
AI Technical Summary
The existing high-speed internal grinding spindle is prone to vibration when rotating at high speed, reducing grinding accuracy, and the grinding head connection is prone to fracture, which poses safety hazards.
By providing three sets of bearing components between the inner spindle and the outer jacket, including bearing retaining rings and ball bearings, the overall rigidity is increased, and further reinforced by the first and second ring plates, the stability during high-speed rotation is improved, and the friction force is reduced by injecting lubricating oil through the oil injection pipe.
Improves the stability of the inner spindle and inner grinding wheel when rotating at high speed, improves grinding accuracy and grinding force, extends service life, and reduces vibration and noise.
Smart Images
Figure CN222726395U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of internal grinding spindles, more specifically to a high-speed internal grinding spindle. Background Art
[0002] High-speed internal grinding spindle is a precision mechanical device used in internal grinding machines. It is usually made of high-quality materials and advanced manufacturing processes to ensure high precision, high efficiency and long life. The internal grinding spindle is one of the core components of the internal grinding machine, and its performance directly affects the working performance and processing quality of the internal grinding machine. With the research and development of super-hard abrasive grinding wheels and ultra-high-speed grinding machine technology, new requirements are also put forward for the matching electric spindles. High-speed grinding can not only greatly improve grinding efficiency, but also effectively improve processing quality. It is one of the most important development directions of grinding technology today. Therefore, the existing high-speed internal grinding spindles are improved in terms of stability.
[0003] For example, the prior art publication number is CN214351698U, the utility model includes a spindle body clamping structure, an internal cylindrical grinding head arranged at the front end of the spindle body clamping structure, and a joint structure arranged at the rear end of the spindle body clamping structure, the internal cylindrical grinding spindle structure has high speed and adjustable speed, low vibration and low noise.
[0004] However, the above-mentioned prior art still has the following problems when in use: the grinding head connecting part of the above-mentioned high-speed internal grinding spindle extends out of the front end cover for a long time, so it is easy to generate vibration when driving the internal grinding wheel to rotate at high speed, which not only reduces the accuracy during grinding, but also the grinding head connecting part is easy to break after long-term use, which is dangerous. Based on this, the utility model provides a high-speed internal grinding spindle with high rotation stability. Utility Model Content
[0005] In order to overcome the above-mentioned defects of the prior art, the utility model provides a high-speed internal grinding spindle, which uses three sets of bearing assemblies to reinforce the inner spindle and the outer sleeve, thereby increasing the overall rigidity and improving the stability of the inner spindle and the inner grinding wheel during high-speed rotation. The rotation speed can reach 30,000 revolutions per minute, so that the inner spindle drives the inner grinding wheel to rotate at a high speed with higher grinding accuracy and greater grinding force, thereby achieving fast and high-precision internal cylindrical grinding to solve the problems arising from the above-mentioned background technology.
[0006] To achieve the above-mentioned objectives, the utility model provides the following technical solutions: a high-speed internal grinding spindle, comprising an inner spindle, an outer sleeve being provided on the outer wall of the inner spindle, three groups of bearing assemblies being provided inside the outer sleeve, for improving the stability of the inner spindle during high-speed rotation, each group of bearing assemblies comprising a bearing retaining ring, ball bearings being provided on both sides of each bearing retaining ring, and multiple ball bearings being sleeved on the outer side of the inner spindle for improving the stability of the inner spindle during rotation, a plurality of annular mounting grooves being provided on the inner wall of the outer sleeve, a plurality of bearing retaining rings and a plurality of ball bearings being respectively provided in the plurality of annular mounting grooves for improving the stability of the bearing retaining rings and the roller bearings, a first ring plate being provided inside the outer sleeve, a second ring plate being sleeved on the outer wall of the first ring plate, the outer wall of the second ring plate being in contact with the inner wall of the outer sleeve, and the first ring plate and the second ring plate being utilized to further improve the stability of the inner spindle during high-speed rotation.
[0007] In a preferred embodiment, three bearing retaining rings are distributed in a linear array inside the outer sleeve, so that the force on the inner spindle is more uniform, thereby greatly improving the stability of the inner spindle when rotating at high speed.
[0008] In a preferred embodiment, a fixed sleeve at one end of the inner spindle is provided with an inner grinding wheel for grinding, and the inner spindle is used to drive the inner grinding wheel to rotate at high speed for processing, which can improve the accuracy of the grinding process.
[0009] In a preferred embodiment, sealing cover plates are fixedly provided at both ends of the outer sleeve, and the two sealing cover plates are both mounted on the inner main shaft, wherein one of the sealing cover plates is arranged between the inner grinding wheel and the outer sleeve to improve the sealing between the inner main shaft and the outer sleeve and prevent dust particles from entering the outer sleeve and causing resistance to the inner main shaft.
[0010] In a preferred embodiment, an oil injection pipe is fixedly passed through the bottom end of the outer sleeve, and the top end of the oil injection pipe passes through the second ring plate and contacts the outer wall of the first ring plate for injecting lubricating oil for lubrication, thereby reducing the friction of the inner main shaft when rotating at high speed.
[0011] In a preferred embodiment, the bottom end of the oil filling pipe is threadedly connected with a threaded cap for sealing the oil filling pipe to prevent leakage of lubricating oil.
[0012] In a preferred embodiment, a connecting rope is fixed on the threaded cover, one end of which is fixed to the outer wall of the outer jacket, and the threaded cover is connected to the outer jacket by the connecting rope to prevent the threaded cover from being lost after being removed.
[0013] Technical effects and advantages of the utility model:
[0014] 1. The utility model reinforces the inner spindle and the outer sleeve through three sets of bearing assemblies, which increases the overall rigidity and can improve the stability of the inner spindle and the inner grinding wheel at high speed rotation. The rotation speed can reach 30,000 revolutions per minute, so that the inner spindle drives the inner grinding wheel to rotate at high speed with higher grinding accuracy and greater grinding force, thereby realizing fast and high-precision internal grinding.
[0015] 2. The first ring plate and the second ring plate also play a reinforcing role between the inner spindle and the outer sleeve, further improving the stability of the inner spindle during high-speed rotation. At the same time, lubricating oil is injected through the oil filling pipe to play a lubricating role, thereby reducing the friction force of the inner spindle during high-speed rotation, thereby extending the service life of the inner spindle. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 This is a front structural diagram of the overall structure of the utility model;
[0017] Figure 2 It is a front cross-sectional view of the overall structure of the utility model;
[0018] Figure 3 It is a partial enlarged view of the utility model;
[0019] Figure 4 It is a partial cross-sectional view of the outer jacket of the utility model.
[0020] The reference numerals are: 1, inner spindle; 2, outer sleeve; 3, bearing assembly; 4, annular mounting groove; 5, first ring plate; 6, second ring plate; 7, inner grinding wheel; 8, sealing cover plate; 9, oil filling pipe; 10, threaded cover; 11, connecting rope;
[0021] 301, bearing retaining ring; 302, ball bearing. DETAILED DESCRIPTION
[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0023] Refer to the instruction manual Figure 1-4The utility model provides a high-speed internal grinding spindle, including an inner spindle 1, the outer wall of the inner spindle 1 is sleeved with an outer sleeve 2, three groups of bearing assemblies 3 are arranged inside the outer sleeve 2, each group of bearing assemblies 3 includes a bearing retaining ring 301, each bearing retaining ring 301 is provided with ball bearings 302 on both sides, and multiple ball bearings 302 are sleeved on the outer side of the inner spindle 1 to improve the stability of the inner spindle 1 during rotation. The three bearing retaining rings 301 are distributed in a linear array inside the outer sleeve 2, so that the force on the inner spindle 1 is more uniform, thereby greatly improving the stability of the inner spindle 1 during high-speed rotation;
[0024] Next, a plurality of annular mounting grooves 4 are provided on the inner wall of the outer sleeve 2, and a plurality of bearing retaining rings 301 and a plurality of ball bearings 302 are respectively provided in the plurality of annular mounting grooves 4, so as to improve the stability of the bearing retaining rings 301 and the roller bearings 302. A first ring plate 5 is provided inside the outer sleeve 2, and a second ring plate 6 is sleeved on the outer wall of the first ring plate 5, and the outer wall of the second ring plate 6 contacts the inner wall of the outer sleeve 2. The first ring plate 5 and the second ring plate 6 can further improve the stability of the inner spindle 1 during high-speed rotation by using the first ring plate 5 and the second ring plate 6;
[0025] An inner grinding wheel 7 for grinding is fixedly sleeved at one end of the inner main shaft 1. The inner grinding wheel 7 is driven by the inner main shaft 1 to rotate at high speed for processing, which can improve the accuracy of the grinding process.
[0026] When in use, three groups of bearing assemblies 3 are sleeved on the outer wall of the inner main shaft 1, and each group of bearing assemblies 3 is composed of a bearing retaining ring 301 and two ball bearings 302. The multiple ball bearings 302 are used to reinforce the inner main shaft 1 and the outer sleeve 2. The connection between the inner main shaft 1 and the inner grinding wheel 7 is reinforced, thereby improving the stability of the inner grinding wheel 7 during high-speed rotation, increasing the overall rigidity, and improving the stability of the inner main shaft 1 during high-speed rotation. The rotation speed can reach 30,000 revolutions per minute, so that the inner main shaft 1 drives the inner grinding wheel 7 to rotate at a high speed with higher grinding accuracy and greater grinding force, thereby achieving fast and high-precision internal grinding.
[0027] Refer to the instruction manual Figure 1-4 , both ends of the outer sleeve 2 are fixed with sealing cover plates 8, and the two sealing cover plates 8 are sleeved on the inner main shaft 1, and one of the sealing cover plates 8 is arranged between the inner grinding wheel 7 and the outer sleeve 2, which is used to improve the sealing between the inner main shaft 1 and the outer sleeve 2, and prevent dust particles from entering the outer sleeve 2 and causing resistance to the inner main shaft 1;
[0028] In addition, an oil injection pipe 9 is fixedly passed through the bottom end of the outer sleeve 2, and the top end of the oil injection pipe 9 passes through the second ring plate 6 and contacts the outer wall of the first ring plate 5, so as to inject lubricating oil for lubrication, thereby reducing the friction force of the inner main shaft 1 when rotating at high speed;
[0029] Moreover, a threaded cap 10 is threadedly connected to the bottom end of the oil filling pipe 9 for sealing the oil filling pipe 9 to prevent the leakage of lubricating oil. At the same time, a connecting rope 11 is fixedly provided on the threaded cap 10, and one end of the connecting rope 11 is fixed to the outer wall of the outer jacket 2. The threaded cap 10 is connected to the outer jacket 2 by the connecting rope 11 to avoid loss of the threaded cap 10 after removal.
[0030] By arranging the first ring plate 5 and the second ring plate 6 on the outer wall of the inner main shaft 1, the first ring plate 5 and the second ring plate 6 also play a reinforcing role between the inner main shaft 1 and the outer sleeve 2, thereby further improving the stability of the inner main shaft 1 during high-speed rotation. At the same time, the oil filling pipe 9 is used to add lubricating oil to the inside of the outer sleeve 2. The lubricating oil can play a lubricating role, thereby reducing the friction force of the inner main shaft 1 during high-speed rotation, thereby extending the service life of the inner main shaft 1.
[0031] Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present utility model should be included in the protection scope of the present utility model.
Claims
1. A high-speed internal grinding spindle, characterized in that: It comprises an inner main shaft (1), the outer wall of the inner main shaft (1) is provided with an outer sleeve (2), and three groups of bearing assemblies (3) are provided inside the outer sleeve (2); Each group of bearing assemblies (3) comprises a bearing retaining ring (301), each bearing retaining ring (301) is provided with ball bearings (302) on both sides, and the plurality of ball bearings (302) are sleeved on the outside of the inner main shaft (1) to improve the stability of the inner main shaft (1) during rotation; the inner wall of the outer sleeve (2) is provided with a plurality of annular mounting grooves (4), and the plurality of bearing retaining rings (301) and the plurality of ball bearings (302) are respectively arranged in the plurality of annular mounting grooves (4); A first ring plate (5) is provided inside the outer sleeve (2); a second ring plate (6) is sleeved on the outer wall of the first ring plate (5); the outer wall of the second ring plate (6) contacts the inner wall of the outer sleeve (2), so as to improve the rotation stability of the inner main shaft (1).
2. A high-speed internal grinding spindle according to claim 1, characterized in that: Three bearing retaining rings (301) are distributed in a linear array inside the outer sleeve (2) to improve the stability of the inner main shaft (1).
3. The high-speed internal grinding spindle according to claim 1, characterized in that: An inner grinding wheel (7) for grinding is fixedly sleeved on one end of the inner main shaft (1).
4. A high-speed internal grinding spindle according to claim 3, characterized in that: Sealing cover plates (8) are fixedly provided at both ends of the outer sleeve (2), and the two sealing cover plates (8) are sleeved on the inner main shaft (1), and one of the sealing cover plates (8) is arranged between the inner grinding wheel (7) and the outer sleeve (2) to improve the sealing performance between the inner main shaft (1) and the outer sleeve (2).
5. The high-speed internal grinding spindle according to claim 1, characterized in that: An oil injection pipe (9) is fixedly passed through the bottom end of the outer sleeve (2), and the top end of the oil injection pipe (9) passes through the second ring plate (6) and contacts the outer wall of the first ring plate (5) for injecting lubricating oil for lubrication.
6. A high-speed internal grinding spindle according to claim 5, characterized in that: The bottom end of the oil filling pipe (9) is threadedly connected with a threaded cover (10) for sealing the oil filling pipe (9).
7. A high-speed internal grinding spindle according to claim 6, characterized in that: A connecting rope (11) is fixedly provided on the threaded cover (10), and one end of the connecting rope (11) is fixed to the outer wall of the outer sleeve (2).