CN219131928U - High-rigidity main shaft for grinding deep holes - Google Patents
High-rigidity main shaft for grinding deep holes Download PDFInfo
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- CN219131928U CN219131928U CN202320233520.1U CN202320233520U CN219131928U CN 219131928 U CN219131928 U CN 219131928U CN 202320233520 U CN202320233520 U CN 202320233520U CN 219131928 U CN219131928 U CN 219131928U
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- mandrel
- shell
- counterweight
- grinding
- spindle
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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Abstract
The utility model discloses a high-rigidity main shaft for grinding deep holes, which comprises the following components: the shell, the mandrel and the counterweight end cover are positioned on the same axis; the mandrel comprises a first mandrel and a second mandrel, one end of the first mandrel is a grinding tool mounting end, a transmission part for transmitting torque is arranged at the other end of the first mandrel and one end of the second mandrel, which is close to the first mandrel, and one end of the second mandrel, which is far away from the first mandrel, is a torque input end; the shell comprises a first shell and a second shell which are sleeved on the mandrel from the installation end of the grinding tool and the torque input end respectively and are detachably connected; bearings are arranged between the shell and the mandrel and are rotationally connected through the bearings, and the bearings are arranged at two ends of the first mandrel and the second mandrel; the counterweight end cover is in clearance fit with the end part of the first shell, which is close to one end of the grinding tool mounting end, and is fixed on the first mandrel, counterweight bolt mounting holes are radially uniformly distributed in the counterweight end cover, and bolts in the counterweight bolt mounting holes are screwed to enable the counterweight bolt mounting holes to relatively displace along the radial direction. The problem that the main shaft for grinding the deep hole is easily affected by vibration is solved.
Description
Technical Field
The utility model relates to the technical field of machining, in particular to a high-rigidity main shaft for grinding deep holes.
Background
The spindle for grinding deep holes requires high speed rotation and unbalance is a common phenomenon for rotating objects. Centrifugal force is generated when the unbalance rotates, the centrifugal force is linearly increased along with the increase of the unbalance, and square secondary change is generated due to the increase of the rotating speed. The main shaft is produced and the certain unbalance amount of unavoidable existence during the assembly, and the tip of installation grinding apparatus one end is in unbalanced state because not retrained, more easily receives unbalance amount influence to because of the centrifugal force that unbalance produced produces vibration, and then influences the grinding precision.
The main shaft for grinding the deep hole is limited by the diameter of the deep hole, the rigidity of the main shaft is reduced due to the fact that the length-diameter ratio of the main shaft is large, vibration is easy to generate during grinding, grinding precision is affected, and even the grinding tool is easy to break due to overlarge vibration, so that safety accidents are caused.
Disclosure of Invention
The utility model provides a high-rigidity main shaft for grinding deep holes, which aims to solve the problems that the main shaft for grinding the deep holes is easily affected by vibration, cannot guarantee grinding precision and even causes safety accidents.
In order to achieve the above object, the technical scheme of the present utility model is as follows:
a high rigidity spindle for grinding deep holes, comprising: the shell, the mandrel and the counterweight end cover are positioned on the same axis;
the mandrel comprises a first mandrel and a second mandrel, one end of the first mandrel is a grinding tool mounting end, the end part of the grinding tool mounting end is used for mounting a grinding tool, a transmission part used for transmitting torque is arranged at one end, close to the first mandrel, of the other end of the first mandrel and one end, close to the first mandrel, of the second mandrel, and one end, far away from the first mandrel, of the second mandrel is a torque input end used for inputting torque to enable the second mandrel to rotate;
the shell comprises a first shell and a second shell, the first shell and the second shell are sleeved on the mandrel from the installation end of the grinding tool and the torque input end respectively, and the first shell and the second shell are detachably connected;
a bearing is arranged between the shell and the mandrel, the shell and the mandrel are rotationally connected through the bearing, and the bearings are arranged at two ends of the first mandrel and the second mandrel;
the counterweight end cover is in clearance fit with the end part of the first shell, which is close to one end of the grinding tool mounting end, the counterweight end cover is fixed on the first mandrel, a plurality of counterweight bolt mounting holes are radially and uniformly distributed on the counterweight end cover, and bolts in the counterweight bolt mounting holes are screwed to enable the counterweight end cover to relatively displace along the radial direction of the counterweight end cover, so that the mass distribution of the counterweight end cover is changed.
Further, the diameter of one end of the first shell, which is close to the mounting end of the grinding tool, is smaller than the diameter of the other end of the first shell, and a transition fillet is arranged at the reducing position of the first shell.
Further, the tip that first casing is close to second casing one end is equipped with the joint portion, the joint portion includes flange portion and the insert portion that sets gradually from the grinding apparatus installation end to the moment of torsion input, the flange portion passes through the screw hole detachably that is equipped with on bolt and the second casing and is connected, the inner chamber of second casing can be inserted to the insert portion, the external diameter of insert portion and the internal diameter assorted of second casing.
Further, the included angle formed by the axes of the adjacent counterweight bolt mounting holes is 30 degrees.
Further, the transmission part comprises a mandrel protrusion arranged on the first mandrel and a mandrel groove arranged on the second mandrel, and the mandrel protrusion is embedded in the mandrel groove.
Further, the cross section of the mandrel protrusion is rectangular.
Further, the cross section of the mandrel protrusion is hexagonal.
The utility model has the beneficial effects that:
according to the high-rigidity main shaft for grinding the deep hole, the shell is arranged on the outer side of the mandrel and is rotationally connected with the mandrel through the bearing, so that the diameter size of the main shaft is increased, the rigidity of the main shaft is improved by increasing the moment of inertia, vibration is weakened, grinding precision is improved, and grinding tool fragmentation is avoided; the balance weight end cover with the plurality of balance weight bolt mounting holes radially and uniformly distributed is fixed at one end of the mandrel mounting grinding tool, so that an operator can change the mass distribution of the balance weight end cover by screwing bolts in the balance weight bolt mounting holes, thereby compensating the unbalance amount existing during the manufacture and assembly of the main shaft, further counteracting the unbalance caused by the asymmetric mass distribution, avoiding the generation of centrifugal force by eliminating the unbalance to avoid vibration, and improving the grinding precision;
in addition, because the bearing sets up and makes both rotate between casing and dabber to be connected, the bearing is in inside the casing (i.e. inside the main shaft), compares in the outside structure of traditional bearing setting at the main shaft, under the prerequisite of guaranteeing the normal rotatory work of main shaft, does not need to reserve the position of installing the main shaft bearing on the lathe, practices thrift the installation space that the main shaft occupy on the lathe.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions of the prior art, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it will be obvious that the drawings in the following description are some embodiments of the present utility model, and that other drawings can be obtained according to these drawings without inventive effort to a person skilled in the art.
FIG. 1 is a schematic view of a high rigidity spindle for grinding deep holes according to the present utility model;
FIG. 2 is a schematic diagram of a high rigidity spindle for grinding deep holes according to the present utility model;
FIG. 3 is a front view of a high rigidity spindle for grinding deep holes according to the present disclosure;
FIG. 4 is a cross-sectional view A-A of FIG. 3;
FIG. 5 is an enlarged view of a portion of FIG. 4 at E;
FIG. 6 is an enlarged view of a portion of FIG. 4 at F;
in the figure:
11. a first housing; 111. a transition fillet; 112. a flange portion; 113. an insertion section;
12. a second housing;
21. a first mandrel; 211. the mandrel is convex;
22. a second mandrel; 221. a mandrel groove;
3. a counterweight end cap; 31. a counterweight bolt mounting hole;
C. a belt pulley; D. grinding wheel.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
The present embodiment provides a high rigidity spindle for grinding deep holes, as shown in fig. 1 to 6, including: a shell, a mandrel and a counterweight end cover 3 which are positioned on the same axis;
as shown in fig. 4, the mandrel includes a first mandrel 21 and a second mandrel 22, one end of the first mandrel 21 is a grinding tool mounting end, the end of the grinding tool mounting end is used for mounting a grinding tool D, a transmission part for transmitting torque is arranged at one end, close to the first mandrel 21, of the other end of the first mandrel 21 and one end, close to the first mandrel 21, of the second mandrel 22, and one end, far away from the first mandrel 21, of the second mandrel 22 is a torque input end for inputting torque to rotate the second mandrel 22;
as shown in fig. 1 and 2, the housing comprises a first housing 11 and a second housing 12, the first housing 11 and the second housing 12 are respectively sleeved on the mandrel from the installation end and the torque input end of the grinding tool, and the first housing 11 and the second housing 12 are detachably connected;
the bearing is arranged between the shell and the mandrel, the shell and the mandrel are rotationally connected through the bearing, the bearings are arranged at two ends of the first mandrel 21 and the second mandrel 22, so that the distance between acting points of the bearings is prolonged, the rotation precision of the mandrel is guaranteed, the shell is arranged outside the mandrel, the diameter size of the spindle is increased, the rigidity of the spindle is improved by increasing the moment of inertia, vibration is weakened, the grinding precision is improved, and the grinding tool D is prevented from being broken;
as shown in fig. 1 and 6, the counterweight end cover 3 is in clearance fit with the end portion of the first housing 11 near the end of the grinding tool mounting end, the counterweight end cover 3 is fixed on the first mandrel 21, a plurality of counterweight bolt mounting holes 31 are radially and uniformly distributed on the counterweight end cover 3, and bolts in the counterweight bolt mounting holes 31 are screwed to enable the counterweight end cover to be radially and relatively displaced along the counterweight end cover 3, so that the mass distribution of the counterweight end cover 3 is changed, the unbalance amount existing during the manufacture and assembly of the main shaft is compensated, unbalance caused by the asymmetric mass distribution is further counteracted, centrifugal force is avoided from being generated by eliminating the unbalance, vibration is avoided, and grinding precision is improved;
in addition, as the bearing is arranged between the shell and the mandrel to enable the shell and the mandrel to be in rotary connection, compared with the structure that the bearing is arranged outside the main shaft in the prior art, the bearing does not need to reserve the position for installing the main shaft bearing on the machine tool on the premise of ensuring the normal rotation of the main shaft, and saves the installation space occupied by the main shaft on the machine tool;
because the mandrel and the shell are of sectional structures, the machine tool is convenient to manufacture and transport, and meanwhile, the machine tool can be installed on the machine tool section by section, and inconvenience in manufacture and installation caused by overlong length of the main shaft is avoided.
In a specific embodiment, the counterweight end cover 3 and the first mandrel 21 are provided with matched threads, and the counterweight end cover 3 is fixed on the first mandrel 21 after being screwed by the threads.
In a specific embodiment, as shown in fig. 6, the counterweight end cover 3 and the first housing 11 can enclose a labyrinth seal structure, so as to prevent chips generated by grinding from entering the housing interior from a fit gap between the counterweight end cover 3 and the first housing 11.
In a specific embodiment, the grinding tool D is a grinding wheel, and the grinding wheel is detachably connected with the end part of the grinding tool mounting end through a screw.
In a specific embodiment, as shown in fig. 3, the torque input end is provided with a belt pulley C, and the belt pulley C can rotate under the drive of an external transmission mechanism to drive the second mandrel 22 to rotate, and the second mandrel 22 drives the first mandrel 21 to rotate through the transmission part, so that the grinding tool D rotates to grind the deep hole.
In a specific embodiment, as shown in fig. 2, the diameter of one end of the first housing 11 near the mounting end of the grinding tool is smaller than the diameter of the other end of the first housing 11, and a transition fillet 111 is arranged at the reducing position of the first housing 11, and the transition fillet 111 can increase the rigidity at the reducing position and reduce the stress concentration.
In a specific embodiment, the end portion of the first housing 11, which is close to one end of the second housing 12, is provided with a joint portion, as shown in fig. 5, where the joint portion includes a flange portion 112 and an insertion portion 113, which are sequentially disposed from the mounting end of the grinding tool to the torque input end, where the flange portion 112 is detachably connected with a threaded hole provided on the second housing 12 by a bolt, where the insertion portion 113 is capable of being inserted into an inner cavity of the second housing 12, and an outer diameter of the insertion portion 113 is matched with an inner diameter of the second housing 12, and an outer wall of the insertion portion 113 is attached to an inner wall of the second housing 12, so as to increase a contact area between the first housing 11 and the second housing 12, thereby improving a connection strength between the first housing 11 and the second housing 12.
In a specific embodiment, the axes of the adjacent weight bolt mounting holes 31 form an included angle of 30 °, and at this included angle, after an operator screws the bolts in the plurality of weight bolt mounting holes 31, it is easier to accurately change the mass distribution of the weight end cover 3.
In a specific embodiment, as shown in fig. 5, the transmission part includes a spindle protrusion 211 provided on the first spindle 21 and a spindle groove 221 provided on the second spindle 22, and the spindle protrusion 211 is fitted in the spindle groove 221.
In a specific embodiment, the cross section of the mandrel protrusion 211 is rectangular, and the rectangular cross section is easy to process and is suitable for transmitting torque.
In a specific embodiment, the cross section of the mandrel protrusion 211 is hexagonal, and the hexagonal cross section can transmit more torque than the rectangular cross section.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the utility model.
Claims (7)
1. A high rigidity spindle for grinding deep holes, comprising: a shell, a mandrel and a counterweight end cover (3) which are positioned on the same axis;
the mandrel comprises a first mandrel (21) and a second mandrel (22), one end of the first mandrel (21) is a grinding tool mounting end, the end part of the grinding tool mounting end is used for mounting a grinding tool, a transmission part used for transmitting torque is arranged at one end, close to the first mandrel (21), of the other end of the first mandrel (21) and one end, close to the first mandrel (21), of the second mandrel (22), and one end, far away from the first mandrel (21), of the second mandrel (22) is a torque input end used for inputting torque to enable the second mandrel (22) to rotate;
the shell comprises a first shell (11) and a second shell (12), the first shell (11) and the second shell (12) are sleeved on the mandrel from the installation end and the torque input end of the grinding tool respectively, and the first shell (11) is detachably connected with the second shell (12);
bearings are arranged between the shell and the mandrel, the shell is rotationally connected with the mandrel through the bearings, and the bearings are arranged at two ends of the first mandrel (21) and the second mandrel (22);
the counterweight end cover (3) is in clearance fit with the end part of the first shell (11) close to one end of the grinding tool mounting end, the counterweight end cover (3) is fixed on the first mandrel (21), a plurality of counterweight bolt mounting holes (31) are radially uniformly distributed in the counterweight end cover (3), and bolts in the counterweight bolt mounting holes (31) are screwed to enable the counterweight end cover to radially and relatively displace along the counterweight end cover (3), so that the mass distribution of the counterweight end cover (3) is changed.
2. A high rigidity spindle for grinding deep holes according to claim 1, characterized in that the diameter of the end of the first housing (11) near the mounting end of the grinding tool is smaller than the diameter of the other end of the first housing (11), and the diameter-changing part of the first housing (11) is provided with a transition fillet (111).
3. The high-rigidity main shaft for grinding deep holes according to claim 1, characterized in that the end of the first shell (11) close to one end of the second shell (12) is provided with a joint part, the joint part comprises a flange part (112) and an insertion part (113) which are sequentially arranged from a grinding tool mounting end to a torque input end, the flange part (112) is detachably connected with a threaded hole formed in the second shell (12) through a bolt, the insertion part (113) can be inserted into an inner cavity of the second shell (12), and the outer diameter of the insertion part (113) is matched with the inner diameter of the second shell (12).
4. A high rigidity spindle for grinding deep holes according to claim 1, characterized in that the axes of adjacent weight bolt mounting holes (31) form an angle of 30 °.
5. A high rigidity spindle for grinding deep holes according to claim 1, characterized in that the transmission part comprises a spindle protrusion (211) provided on the first spindle (21) and a spindle recess (221) provided on the second spindle (22), the spindle protrusion (211) being fitted in the spindle recess (221).
6. A high rigidity spindle for grinding deep holes according to claim 5, characterized in that the cross section of the spindle protrusion (211) is rectangular.
7. A high rigidity spindle for grinding deep holes according to claim 5, characterized in that the cross section of the spindle protrusion (211) is hexagonal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320233520.1U CN219131928U (en) | 2023-02-16 | 2023-02-16 | High-rigidity main shaft for grinding deep holes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320233520.1U CN219131928U (en) | 2023-02-16 | 2023-02-16 | High-rigidity main shaft for grinding deep holes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219131928U true CN219131928U (en) | 2023-06-06 |
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ID=86563963
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320233520.1U Active CN219131928U (en) | 2023-02-16 | 2023-02-16 | High-rigidity main shaft for grinding deep holes |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219131928U (en) |
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2023
- 2023-02-16 CN CN202320233520.1U patent/CN219131928U/en active Active
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