Electric spindle equipment for high-precision gear grinding workpiece

Abstract

The utility model relates to motorized spindle equipment for a high-precision gear grinding workpiece, which comprises a working turntable, a rotating shaft connected with the working turntable through a screw, a motor device sleeved on the rotating shaft, a shell sleeved outside the motor device, a water jacket ring connected with the shell, a main bearing device mounted at one end of the rotating shaft, and a main bearing device mounted at the other end of the rotating shaft. The other end of the rotating shaft is provided with an auxiliary bearing device, the auxiliary bearing device is connected with an encoding device through a locking screw, the encoding device is sleeved with a rear end cover, the rear end cover is connected with the auxiliary bearing device through a positioning screw, a through hole is formed in the shell, and one end of the rotating shaft penetrates through the through hole and then is connected with a rotating oil cylinder. Therefore, the high-precision angular contact ball bearing is adopted, front-back auxiliary limiting guiding of the rotating shaft is achieved, necessary rigid support can be provided when the rotating shaft rotates at a high speed, and the use precision is improved. And the independent coding device is configured, so that accurate positioning of the rotating shaft can be realized, and the final positioning accuracy of the high-precision gear grinding workpiece is improved.

Description

Technical Field

[0001] The utility model relates to an electric spindle device, in particular to an electric spindle device used for high-precision gear grinding workpieces. Background Art

[0002] From the existing technology, gears are a key component in the transmission system and are used in various industries. In the field of precision transmission, the accuracy of gears has a great impact on the transmission. For this reason, the industry has high requirements for transmission accuracy and needs to take into account requirements such as operating height and low vibration. At the same time, the workpiece shaft is the shaft that supports the gear blank to be processed. Its performance determines the accuracy and efficiency of the gear grinding.

[0003] However, most workpiece shafts currently are belt-driven mechanical shafts. They have a low rotational speed, large vibrations, and are prone to slippage, which affects machining accuracy. At the same time, due to their bearing-fixed structure, they are prone to poor shaft rigidity and a short service life. During use, the motor often drives the belt, which in turn drives the spindle mandrel at variable speeds, occupying a relatively large area in the installation space. For this reason, installation and disassembly are inconvenient. Simply put, the pulley needs to be aligned during installation, and parameters such as the actual parallelism between the motor shaft and the grinding shaft will affect the smoothness, accuracy, and life of the workpiece shaft. In addition, since the workpiece shaft also has to clamp the blank gear during operation, it will also affect the surface quality of the gear.

[0004] In view of the above-mentioned defects, the designers have actively carried out research and innovation in order to create an electric spindle device for high-precision gear grinding workpieces, making it more valuable for industrial use. Utility Model Content

[0005] In order to solve the above technical problems, the purpose of the utility model is to provide an electric spindle device for high-precision gear grinding workpieces.

[0006] The utility model provides an electric spindle device for high-precision gear grinding workpieces, including a working turntable, wherein: the working turntable is connected to a rotating shaft by screws, a motor device is sleeved on the rotating shaft, a shell is provided on the outer shell of the motor device, a water jacket ring is connected to the shell, a main bearing device is installed at one end of the rotating shaft, a secondary bearing device is installed at the other end of the rotating shaft, the secondary bearing device is connected to an encoding device by a locking screw, a rear end cover is provided on the outer shell of the encoding device, the rear end cover is connected to the secondary bearing device by a positioning screw, a through hole is provided on the shell, one end of the rotating shaft is connected to a rotating oil cylinder after passing through the through hole; the motor device includes a torque motor connected to the rotating shaft, the torque motor is connected to a locking ring by a locking screw, and the locking ring is connected to a rotor assembly by a locking screw, the outer interference fit sleeve of the torque motor is provided with a motor water jacket, and the shell is located outside the motor water jacket.

[0007] Furthermore, the above-mentioned electric spindle equipment for high-precision gear grinding workpieces, wherein the main bearing device includes a front end cover, a blow ring is embedded in the side of the front end cover facing the working turntable, a plurality of main bearing assemblies are distributed on the front end cover, a main locking nut is sleeved on the main shaft, and the main locking nut is in contact with the main bearing assembly.

[0008] Furthermore, in the above-mentioned electric spindle equipment for high-precision gear grinding workpieces, the main bearing assembly adopts three main bearing rings, two of which are stacked to form a double-ring bearing mechanism, and the other main bearing ring forms a single-ring bearing mechanism, a spacer ring assembly is provided between the double-ring bearing mechanism and the single-ring bearing mechanism, an adjustment ring is provided between the single-ring bearing mechanism and the main locking nut, and the spacer ring assembly is an inner spacer ring and an outer spacer ring that are nested with each other.

[0009] Furthermore, the above-mentioned electric spindle equipment for high-precision gear grinding workpieces, wherein the secondary bearing device includes a rear bearing seat in contact with the motor device, an adjustment gasket is provided on the rear bearing seat, and a secondary bearing assembly is distributed on the adjustment gasket, the secondary bearing assembly is mounted on the rotating shaft, and the rear bearing seat is connected to the rear end cover by a positioning screw.

[0010] Furthermore, in the above-mentioned electric spindle device for high-precision gear grinding workpieces, the auxiliary bearing assembly is formed by stacking two auxiliary bearing rings to form a double-ring bearing mechanism.

[0011] Furthermore, the above-mentioned electric spindle equipment for high-precision gear grinding workpieces, wherein the encoding device includes an encoding wheel sleeved on the rotating shaft, a fixed seat is installed on the encoding wheel, the fixed seat is connected to the secondary bearing assembly through a locking screw, and a secondary locking nut is sleeved on the rotating shaft, and the secondary locking nut is in contact with the fixed seat.

[0012] Furthermore, in the above-mentioned electric spindle device for high-precision gear grinding workpieces, one end of the rotating shaft is connected to an adapter, and a rotating cylinder is also installed on the adapter, and the adapter and the rotating cylinder are connected to the rotating shaft through screws.

[0013] Furthermore, in the above-mentioned electric spindle device for high-precision gear grinding workpieces, a plurality of sealing rings are filled between the housing and the water jacket ring.

[0014] Furthermore, in the above-mentioned electric spindle device for high-precision gear grinding workpieces, the rear end cover is installed with a plurality of quick-connect connectors, power line sockets, and signal line sockets.

[0015] By means of the above solution, the present invention has at least the following advantages:

[0016] 1. High-precision angular contact ball bearings are used to achieve auxiliary limit guidance for the rotating shaft in the front and rear, which can provide necessary rigid support when the rotating shaft runs at high speed and improve the use accuracy.

[0017] 2. Equipped with an independent encoding device, it can achieve precise positioning of the rotating shaft and improve the final positioning accuracy of high-precision gear grinding workpieces.

[0018] 3. There is little vibration during use, which can meet the needs of high-speed and long-term operation.

[0019] 4. The overall structure is simple, easy to install and use.

[0020] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and to implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the electric spindle equipment used for high-precision gear grinding workpieces.

[0022] Figure 2 This is a schematic diagram of the half-section structure of an electric spindle device used for high-precision gear grinding workpieces.

[0023] The meanings of the reference numerals in the figures are as follows.

[0024] 1 Working turntable 2 Blowing ring

[0025] 3 Front cover 4 Rotating shaft

[0026] 5 Shell 6 Inner spacer ring

[0027] 7 Outer spacer ring 8 Water jacket ring

[0028] 9 Adjusting ring 10 Main locking nut

[0029] 11 Motor water jacket 12 Locking ring

[0030] 13 Adjusting shim 14 Rear bearing seat

[0031] 15 Fixed seat 16 Rear end cover

[0032] 17 adapter 18 rotary cylinder

[0033] 19 Secondary locking nut 20 Locking screw

[0034] 21 Code wheel 22 Secondary bearing assembly

[0035] 23 Sealing ring 24 Torque motor

[0036] 25 Main bearing assembly 26 Quick connector

[0037] 27 Power line socket 28 Signal line socket DETAILED DESCRIPTION

[0038] The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0039] like Figures 1 to 2 The electric spindle device for high-precision gear grinding includes a working turntable 1. The working turntable 1 is different in that: the working turntable 1 is connected to the rotating shaft 4 by screws, and the rotating shaft 4 is provided with a motor device for driving the rotating shaft 4, thereby driving the working turntable 1 to start running through the motor device. At the same time, considering the integrated configuration, the motor device is provided with a shell 5, and the shell 5 is connected to a water ring 8. In addition, in order to ensure the stable rotation of the rotating shaft 4, a main bearing device is installed at one end of the rotating shaft 4, and a secondary bearing device is installed at the other end of the rotating shaft 4. Considering the high-precision control of the actual rotation of the rotating shaft 4, the secondary bearing device is connected to the encoding device through a locking screw 20, and the encoding device is provided with a rear end cover 16. The rear end cover 16 is connected to the secondary bearing device through a positioning screw. Furthermore, in order to cooperate with the oil injection docking, a through hole is provided on the shell 5, and one end of the rotating shaft 4 is connected to the rotating cylinder 18 after passing through the through hole. During implementation, the motor assembly employed in this utility model includes a torque motor 24 connected to the rotating shaft 4. The torque motor 24 is connected to the locking ring 12 via a locking screw 20. The locking ring 12 is connected to the rotor assembly via a locking screw 20. A motor water jacket 11 is provided on the outer side of the torque motor 24 through an interference fit, and the housing 5 is positioned outside the motor water jacket 11. This ensures that the motor assembly's operating cooling requirements are met. Specifically, the introduction of coolant effectively dissipates the heat generated by the motor assembly, main bearing assembly, and auxiliary bearing assembly, allowing the rotating shaft 4 to operate at an extremely low temperature and achieve effective thermal balance.

[0040] In view of a preferred embodiment of the present invention, the main bearing device includes a front end cover 3, and a blow ring 2 is embedded on the side of the front end cover 3 facing the working turntable 1 to increase the overall airtightness of the front end. At the same time, a number of main bearing assemblies 25 are distributed on the front end cover 3, and a main locking nut 10 is sleeved on the main shaft, and the main locking nut 10 is in contact with the main bearing assembly 25. In this way, the main bearing assembly 25 is properly limited to avoid unnecessary lateral shaking during operation. Specifically, the main bearing assembly 25 uses three main bearing rings, two of which are stacked (back to back) to form a double-ring bearing mechanism, and the other main bearing ring forms a single-ring bearing mechanism. In addition, a spacer ring assembly is sleeved between the double-ring bearing mechanism and the single-ring bearing mechanism, and an adjustment ring 9 is separated between the single-ring bearing mechanism and the main locking nut 10 to fill the gap caused by the bonding tolerance. In order to achieve a better fit, the spacer ring assembly used is an inner spacer ring 6 and an outer spacer ring 7 that are nested with each other.

[0041] Furthermore, the secondary bearing assembly includes a rear bearing seat 14 that contacts the motor assembly. An adjustment shim 13 is mounted on the rear bearing seat 14, onto which a secondary bearing assembly 22 is mounted. The secondary bearing assembly 22 is mounted on the rotating shaft 4. The adjustment shim 13 allows the position and precision of the secondary bearing assembly 22 to be adjusted after assembly. A sealing ring 23 is also provided between the rear bearing seat 14 and the housing 5. The rear bearing seat 14 is connected to the rear end cap 16 via set screws, ensuring a stable assembly. Specifically, the secondary bearing assembly 22 is constructed by stacking two secondary bearing rings to form a double-ring bearing mechanism. Furthermore, the main bearing ring has a larger diameter, while the secondary bearing ring has a smaller diameter. This allows for a closer fit with the uneven diameter of the rotating shaft 4, ensuring optimal rigidity. Furthermore, to improve fit precision, both the main and secondary bearing rings are angular contact ball bearings. The interplay between the main bearing assembly 25 and the secondary bearing assembly 22 achieves a structure where the inner ring is compressed and the outer ring is released. In this way, even if the rotating shaft 4 undergoes thermal elongation due to high heat, the open bearing distribution of the present invention can achieve auxiliary positioning of the rotating shaft 4 without abnormal displacement, thereby improving the accuracy of use.

[0042] In practical implementation, to achieve precise position control of the electric spindle formed by the rotating shaft 4, the encoding device includes an encoder wheel 21 mounted on the rotating shaft 4. A fixing seat 15 is mounted on the encoder wheel 21. The fixing seat 15 is connected to the rear bearing seat 14 of the secondary bearing assembly 22 via a locking screw 20. Furthermore, a secondary locking nut 19 is mounted on the rotating shaft 4 and contacts the fixing seat 15. This ensures stable and convenient locking.

[0043] At the same time, considering the need for stable docking in subsequent use, one end of the rotating shaft 4 is connected to the rear end adapter seat 17, and a rotating cylinder 18 is installed on the rear end adapter seat 17. Taking into account the stability of the connection, the rear end adapter seat 17 and the rotating cylinder 18 are connected to the rotating shaft 4 by screws. In addition, in order to meet the sealing requirements of the integrated combination, a number of sealing rings 23 are filled between the shell 5 and the water jacket ring 8. Furthermore, considering the docking of components with external equipment, a number of quick-connect connectors 26, power line sockets 27, and signal line sockets 28 can be installed on the rear end cover 16. The actual connection method of the quick-connect connector 26, power line socket 27, and signal line socket 28 is similar to that of the currently commercially available electric spindle products and will not be repeated here.

[0044] It can be seen from the above text description and the accompanying drawings that the present invention has the following advantages:

[0045] 1. High-precision angular contact ball bearings are used to achieve auxiliary limit guidance for the rotating shaft in the front and rear, which can provide necessary rigid support when the rotating shaft runs at high speed and improve the use accuracy.

[0046] 2. Equipped with an independent encoding device, it can achieve precise positioning of the rotating shaft and improve the final positioning accuracy of high-precision gear grinding workpieces.

[0047] 3. There is little vibration during use, which can meet the needs of high-speed and long-term operation.

[0048] 4. The overall structure is simple, easy to install and use.

[0049] In addition, the indicated orientations or positional relationships described in the present invention are 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. They do not indicate or imply that the device or structure referred to must have a specific orientation or be operated in a specific orientation structure. Therefore, they cannot be understood as a limitation on the present invention.

[0050] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. It should be pointed out that ordinary technicians in this technical field can make several improvements and modifications without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. An electric spindle device for high-precision gear grinding, including a work turntable, characterized by: The working turntable is connected to a rotating shaft by screws, and a motor device is sleeved on the rotating shaft, and a shell is provided outside the motor device, and a water jacket ring is connected to the shell. A main bearing device is installed at one end of the rotating shaft, and a secondary bearing device is installed at the other end of the rotating shaft. The secondary bearing device is connected to an encoding device through a locking screw, and a rear end cover is provided outside the encoding device, and the rear end cover is connected to the secondary bearing device through a positioning screw. A through hole is provided on the shell, and one end of the rotating shaft is connected to a rotating cylinder after passing through the through hole; the motor device includes a torque motor connected to the rotating shaft, and the torque motor is connected to a locking ring through a locking screw, and the locking ring is connected to a rotor assembly through a locking screw. The outer interference fit sleeve of the torque motor is provided with a motor water jacket, and the shell is located outside the motor water jacket.

2. The electric spindle device for high-precision gear grinding according to claim 1, characterized in that: The main bearing device includes a front end cover, a blowing ring is embedded in the side of the front end cover facing the working turntable, a plurality of main bearing assemblies are distributed on the front end cover, a main locking nut is sleeved on the main shaft, and the main locking nut is in contact with the main bearing assembly.

3. The electric spindle device for high-precision gear grinding according to claim 2, characterized in that: The main bearing assembly adopts three main bearing rings, two of which are stacked to form a double-ring bearing mechanism, and the other main bearing ring forms a single-ring bearing mechanism. A spacer ring assembly is provided between the double-ring bearing mechanism and the single-ring bearing mechanism, and an adjustment ring is provided between the single-ring bearing mechanism and the main locking nut. The spacer ring assembly is an inner spacer ring and an outer spacer ring that are nested with each other.

4. The electric spindle device for high-precision gear grinding according to claim 1, characterized in that: The auxiliary bearing device includes a rear bearing seat in contact with the motor device, an adjustment gasket is provided on the rear bearing seat, an auxiliary bearing assembly is distributed on the adjustment gasket, the auxiliary bearing assembly is provided on the rotating shaft, and the rear bearing seat is connected to the rear end cover by a positioning screw.

5. The electric spindle device for high-precision gear grinding according to claim 4, characterized in that: The auxiliary bearing assembly is formed by stacking two auxiliary bearing rings to form a double-ring bearing mechanism.

6. The electric spindle device for high-precision gear grinding according to claim 1, characterized in that: The encoding device includes an encoding wheel sleeved on the rotating shaft, a fixing seat is installed on the encoding wheel, the fixing seat is connected to the secondary bearing assembly through a locking screw, a secondary locking nut is sleeved on the rotating shaft, and the secondary locking nut is in contact with the fixing seat.

7. The electric spindle device for high-precision gear grinding according to claim 1, characterized in that: One end of the rotating shaft is connected to a transfer seat, and a rotating oil cylinder is installed on the transfer seat. The transfer seat and the rotating oil cylinder are connected to the rotating shaft through screws.

8. The electric spindle device for high-precision gear grinding according to claim 1, characterized in that: A plurality of sealing rings are filled between the shell and the water jacket ring.

9. The electric spindle device for high-precision gear grinding according to claim 1, characterized in that: The rear end cover is equipped with a plurality of quick-connect connectors, power line sockets, and signal line sockets.

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