Middle shaft transmission supporting structure

Abstract

The invention relates to the technical field of automation equipment, and discloses a center shaft transmission supporting structure and a numerical control machine tool. The rotating motor is fixedly arranged in the mounting cavity; the middle shaft is rotationally arranged in the mounting cavity through a radial bearing, one end of the middle shaft is in transmission connection with the output end of the rotating motor, and the other end of the middle shaft is in transmission connection with the main shaft; and the positioning glue pouring sleeve is fixedly arranged on the periphery of the radial bearing in a sleeving mode, a glue pouring gap is formed between the periphery of the positioning glue pouring sleeve and the inner wall of the installation cavity, and an adhesive layer is arranged in the glue pouring gap and used for bonding the positioning glue pouring sleeve and the inner wall of the installation cavity. According to the center shaft transmission supporting structure, the radial movement of the center shaft can be greatly reduced, and the machining stability and precision are improved.

Description

Technical Field

[0001] The invention relates to the technical field of automation equipment, and in particular to a central shaft transmission support structure and a numerically controlled machine tool. Background Art

[0002] With the rapid development of social production and science and technology, mechanical products are becoming more and more sophisticated and complex, and the demand for frequent modifications, especially in the fields of aerospace, shipbuilding, military, etc., the mechanical parts required have high precision requirements, complex shapes and small batches.

[0003] CNC machine tools can effectively solve the problems of complex, precise, small batch and multi-variety parts processing, and are a flexible and high-efficiency automated machine tool.

[0004] At present, due to the high speed of the spindle, there is a certain amount of movement in the radial direction, which affects the processing stability and accuracy.

[0005] Therefore, there is an urgent need for a central shaft transmission support structure and a CNC machine tool to solve the above-mentioned technical problems. Summary of the invention

[0006] Based on the above, the purpose of the present invention is to provide a central shaft transmission support structure and a CNC machine tool, which can significantly reduce the radial movement of the central shaft and improve the processing stability and precision.

[0007] To achieve the above object, the present invention adopts the following technical solutions: A central shaft transmission support structure is provided, comprising: A ram, wherein a mounting cavity is provided in the ram; A rotating motor is fixedly disposed in the installation cavity; A central shaft is rotatably disposed in the mounting cavity through a radial bearing, one end of the central shaft is transmission-connected to the output end of the rotating motor, and the other end of the central shaft is transmission-connected to the main shaft; A positioning glue-potting sleeve is fixedly mounted on the outer periphery of the radial bearing, a glue-potting gap is provided between the outer periphery of the positioning glue-potting sleeve and the inner wall of the mounting cavity, an adhesive layer is provided in the glue-potting gap, and the adhesive layer is used to bond the positioning glue-potting sleeve to the inner wall of the mounting cavity.

[0008] By adopting the above technical solution, after the rotating motor is started, the output end of the rotating motor drives the central shaft to rotate, and the central shaft rotates stably in the installation cavity through the radial bearing, and transmits power to the main shaft, thereby driving the machine tool to perform processing operations; the installation cavity arranged in the slide provides a stable installation environment for the rotating motor and the central shaft, ensuring the overall stability of the transmission system; the central shaft is rotatably arranged in the installation cavity through the radial bearing, which effectively reduces the radial shaking of the central shaft during the rotation process and improves the transmission accuracy; the output end of the rotating motor is directly connected to one end of the central shaft for transmission, reducing the energy loss in the transmission process and improving the transmission efficiency; the other end of the central shaft is connected to the main shaft for transmission, thereby ensuring the continuity and stability of power transmission and further improving the processing performance of the machine tool; the positioning glue-filled fixed sleeve is arranged on the outer periphery of the radial bearing and is tightly connected to the inner wall of the installation cavity through the adhesive layer; it not only enhances the fixing effect of the radial bearing, but also reduces the looseness and wear caused by vibration, thereby improving the accuracy and durability of the transmission system.

[0009] As an optional technical solution for the central axis transmission support structure, the central axis transmission support structure also includes two sealing rings, which are arranged side by side and spaced apart on the outer periphery of the positioning glue potting sleeve, and the two sealing rings are used to seal the gap between the outer periphery of the positioning glue potting sleeve and the inner wall of the installation cavity to form the glue potting gap between the two sealing rings.

[0010] By adopting the above technical scheme, the two sealing rings fit tightly on the inner wall of the installation cavity to form two sealing barriers, which effectively seal the gap between the outer periphery of the positioning glue potting sleeve and the inner wall of the installation cavity; not only the integrity of the glue potting gap is ensured, but also the leakage problem that may occur during the operation of the machine tool is prevented, and the stability of the structure is further enhanced; the sealing ring not only ensures the sealing of the glue potting gap, but also prevents the lubricating oil or other liquids that may occur during the operation of the machine tool from leaking into the glue potting gap and damaging the adhesive layer; at the same time, the sealing ring also plays a role of buffering and shock absorption, protecting the positioning glue potting sleeve and the installation cavity from external impact and vibration.

[0011] As an optional technical solution for the central axis transmission support structure, the slide is provided with a glue inlet hole and a glue outlet hole, and the glue inlet hole and the glue outlet hole are respectively connected to the glue filling gap and the outside, and the glue inlet hole is used to inject glue into the glue filling gap to form the glue layer, and the glue layer can overflow excess glue through the glue outlet hole.

[0012] By adopting the above technical solution, by setting the glue inlet hole on the slide, the amount of glue injected into the glue filling gap can be accurately controlled, which not only ensures that the glue layer can fully fill the gap, but also avoids waste caused by excessive injection and unevenness after curing; the glue outlet hole allows excess glue to overflow, which further helps to accurately control the thickness and uniformity of the glue layer and improves the stability and reliability of the structure; the operator only needs to inject glue through the glue inlet hole and observe whether there is glue overflow from the glue outlet hole to determine whether the glue filling process is completed; because the glue inlet hole and the glue outlet hole allow excess glue to overflow, it is ensured that the glue layer in the glue filling gap can be cured quickly and evenly, and no residual glue requires additional time to cure, thereby shortening the overall curing time; the adhesive layer is injected through the glue inlet hole and fully fills the glue filling gap, and is tightly connected with the positioning glue filling sleeve and the inner wall of the mounting cavity, thereby enhancing the stability of the support structure, reducing looseness and wear caused by vibration or impact, and a shorter curing time helps to shorten the production cycle and improve the availability and production efficiency of the machine tool.

[0013] As an optional technical solution for the central shaft transmission support structure, two radial bearings are provided, and the two radial bearings are arranged side by side along the axial direction of the central shaft.

[0014] By adopting the above technical solution, by arranging two radial bearings side by side along the axial direction of the central shaft, the central shaft is supported more evenly and stably, effectively reducing the radial shaking and runout that may be generated by the central shaft when rotating at high speed, and improving the stability and accuracy of the transmission system; the radial bearing will generate a certain amount of heat during operation; the two radial bearings arranged side by side can disperse the heat and reduce the temperature rise of a single bearing, thereby improving the heat dissipation performance of the entire transmission support structure, helping to maintain the normal operation of the bearing and extend its service life; the side-by-side arrangement of the two radial bearings makes the central shaft more stable when rotating, reduces the energy loss caused by shaking, helps to improve the transmission efficiency, and enables the machine tool to use power more efficiently during the processing process.

[0015] As an optional technical solution for the central shaft transmission support structure, the central shaft transmission support structure also includes an intermediate bearing cover and a front spacer sleeve, the intermediate bearing cover is pressed against the inner ring of one of the radial bearings from one side, and the front spacer sleeve is pressed against the inner ring of the other radial bearing from the other side.

[0016] By adopting the above technical solution, the intermediate bearing cover and the front spacer are pressed against the inner rings of the two radial bearings from both sides, which effectively enhances the axial fixing effect of the bearing, prevents the axial movement of the bearing during operation, and ensures the stable rotation of the center shaft; the intermediate bearing cover and the front spacer help to form a closed bearing chamber, which is beneficial to the lubrication and heat dissipation of the bearing. They can guide the lubricating oil or cooling medium to be more evenly distributed on the bearing surface, reduce friction and wear, and improve the heat dissipation efficiency.

[0017] As an optional technical solution for the central shaft transmission support structure, the central shaft transmission support structure also includes a locking nut, the outer periphery of the central shaft is provided with an external threaded portion and a limiting step, the front sleeve and the two radial bearings are both arranged between the external threaded portion and the limiting step; the end of the intermediate bearing cover facing away from the radial bearing abuts against the limiting step, the locking nut is threadedly connected to the external threaded portion, and the locking nut can push the side of the front sleeve away from the radial bearing, so that the front sleeve and the intermediate bearing cover can jointly clamp the two radial bearings.

[0018] By adopting the above technical solution, by arranging an external threaded portion and a limiting step on the outer periphery of the central shaft, and cooperating with a locking nut, a front spacer and an intermediate bearing cover, the two radial bearings are firmly clamped, effectively preventing the loosening and displacement of the bearings during operation, ensuring the stability and accuracy of the central shaft transmission, effectively preventing failures and damages caused by loosening or displacement of the bearings, and improving the reliability and durability of the machine tool; when the bearing needs to be replaced, the operator only needs to rotate the locking nut to adjust the bearing preload, without complicated disassembly and reinstallation steps, thereby improving work efficiency; As an optional technical solution for the central axis transmission support structure, the central axis transmission support structure also includes a motor mounting plate, a first transition ring and a second transition ring. The motor mounting plate is fixed in the mounting cavity, the rotating motor is installed on the motor mounting plate, the first transition ring is fixed to the inner wall of the mounting cavity, the second transition ring is fixed to the motor mounting plate, and the second transition ring is tightly sleeved on the first transition ring.

[0019] By adopting the above technical solution, the motor mounting plate is directly fixed in the mounting cavity, and the rotating motor is mounted on the motor mounting plate, which effectively reduces the use of additional brackets or connectors and makes the overall structure more compact; the first transition ring is fixed to the inner wall of the mounting cavity, providing a stable support reference for the rotating motor; the second transition ring is fixed to the motor mounting plate and tightly sleeved on the first transition ring, ensuring that the axis of the rotating motor is aligned with the axis of the central shaft, effectively improving the installation accuracy and enhancing the stability of the structure; making the rotating motor, transition ring and other related components of the central shaft transmission support structure easy to disassemble and replace; when maintenance or replacement of parts is required, the operator can easily remove the motor mounting plate and the components on the motor mounting plate without the need for complicated disassembly of the entire machine tool, thereby improving the convenience of maintenance.

[0020] As an optional technical solution for the central shaft transmission support structure, the adhesive layer is made of positioning adhesive.

[0021] By adopting the above technical solution, the positioning glue has precise bonding and positioning capabilities, which can ensure that the various components in the central axis transmission support structure are accurately aligned and fixed, reduce transmission errors caused by loose or misaligned components, and improve the stability and reliability of the overall structure;.

[0022] As an optional technical solution for the central axis transmission support structure, the main shaft is rotatably arranged in the installation cavity, and the main shaft is connected to the central axis transmission through a coupling; the adhesive layer formed by the positioning glue not only provides a strong adhesive force, but also enhances the connection strength between the components, helps to resist vibration and impact during operation, and prolongs the service life of the central axis transmission support structure; the use of positioning glue simplifies the installation process of the central axis transmission support structure, without the need for complex adjustment and calibration. At the same time, the firmness of the adhesive layer also reduces the frequency and difficulty of daily maintenance, reducing maintenance costs.

[0023] By adopting the above technical solution, the main shaft is connected to the central shaft through the coupling, ensuring the accuracy and stability of the transmission; the adhesive layer formed by the positioning glue not only provides a strong bonding force, but also significantly enhances the connection strength between the main shaft and the central shaft and other key components, which helps to resist vibration and impact during operation, and reduces the transmission error caused by looseness or wear, thereby extending the service life of the central shaft transmission support structure and even the entire CNC machine tool; using positioning glue as the adhesive layer material simplifies the installation process of the central shaft transmission support structure, and the precise bonding ability of the positioning glue makes it easier to align the components without the need for complicated adjustment and calibration steps, which not only shortens the installation time, but also improves the installation accuracy and ensures the stable operation of the transmission system; the adhesive layer formed by the positioning glue has excellent durability and stability, and can maintain the bonding strength and performance of the positioning glue for a long time; therefore, the firmness of the adhesive layer reduces the frequency and difficulty of daily maintenance, and reduces the maintenance cost caused by looseness, wear or failure.

[0024] On the other hand, the present application provides a CNC machine tool, including a machine tool body and a transmission system, wherein the transmission system is installed on the machine tool body, the transmission system includes the central axis transmission support structure as described above, the slide is arranged on the machine tool body along a straight line for sliding, and a rotating tool is installed on the end of the spindle away from the central axis.

[0025] By adopting the above technical solution and the above-mentioned central axis transmission support structure, the transmission system of the CNC machine tool obtains higher stability. The adhesive layer in the central axis transmission support structure is made of positioning glue, which ensures the precise alignment and firm connection between the components, reduces the transmission error caused by looseness or misalignment, and thus improves the overall performance and reliability of the transmission system; the spindle of the CNC machine tool is connected to the main body of the machine tool through the central axis transmission support structure, which ensures the stability and precision of the spindle during the processing; a rotating tool is installed at the end of the spindle away from the central axis, and the precise position and stable operation of the tool help to improve the processing accuracy and meet the processing requirements of high-precision parts; the central axis transmission support structure makes the transmission system more compact and reduces space occupancy; it helps to improve the overall integration of the CNC machine tool, making the machine tool structure more compact and reasonable, and improving the flexibility and adaptability of the machine tool; the components in the central axis transmission support structure are easy to disassemble and replace, reducing the difficulty and cost of maintenance; at the same time, the use of positioning glue also reduces the failure rate caused by looseness and extends the service life of the CNC machine tool.

[0026] In summary, the present application includes at least one of the following beneficial technical effects: 1. By setting a positioning rubber sleeve in the installation cavity of the ram and setting an adhesive layer between the positioning rubber sleeve and the inner wall of the installation cavity, the fixing effect of the radial bearing is effectively enhanced, the radial shaking of the middle shaft during high-speed rotation is reduced, and the stability and accuracy of the transmission system are improved; 2. The middle shaft is rotatably arranged in the installation cavity through a radial bearing and is transmission-connected to the output end of the rotating motor, which ensures the continuity and stability of power transmission, reduces energy loss during transmission, and improves transmission efficiency; 3. A glue filling gap is set between the outer periphery of the positioning glue filling sleeve and the inner wall of the installation cavity, and the glue injection amount is accurately controlled through the glue inlet and outlet holes to ensure the uniform distribution and curing of the glue layer, improve the stability and reliability of the structure, and also shorten the overall curing time and improve production efficiency; 4. By setting two sealing rings, the gap between the positioning glue potting sleeve and the installation cavity is sealed, forming an effective sealing barrier, preventing lubricating oil or other liquids from leaking into the glue potting gap and damaging the adhesive layer, further enhancing the stability and reliability of the structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 : is a schematic diagram of the structure of the central shaft transmission support structure provided by an embodiment of the present invention: Figure 2 Is a cross-sectional view of the central shaft transmission support structure provided in an embodiment of the present invention; Figure 3 yes Figure 2 Enlarged schematic diagram of area A: Figure 4 It is a cross-sectional view of the central shaft transmission support structure provided by an embodiment of the present invention.

[0028] Description of reference numerals: 100, ram; 110, mounting cavity; 120, glue inlet hole; 130, glue outlet hole; 200. Rotating electrical machines; 300, center axis; 310, limit step; 400, spindle; 1. Positioning rubber sleeve; 2. Radial bearing; 3. Glue filling gap; 4. Adhesive layer; 5. Sealing ring; 6. Intermediate bearing cover; 7. Front spacer; 8. Locking nut; 9. Motor mounting plate; 10. First transition ring; 11. Second transition ring; 12. Expansion sleeve; 13. Coupling. DETAILED DESCRIPTION

[0029] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved clearer, the technical solutions of the embodiments of the present invention will be further described in detail in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention. It is understandable that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for the convenience of description, only part of the structure related to the present invention, rather than all of the structure, is shown in the accompanying drawings.

[0030] In the description of this embodiment, the terms "upper", "lower", "left", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operate in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0031] This embodiment provides a CNC machine tool, which includes a machine tool body and a transmission system. The transmission system is installed on the machine tool body, and the transmission system includes a central shaft transmission support structure. Figure 1-Figure 4 As shown, the central axis transmission support structure includes a ram 100, a rotating motor 200, a central axis 300 and a positioning rubber sleeve 1. The ram 100 is arranged on the machine tool body along a straight line for sliding. An installation cavity 110 is provided in the ram 100. The rotating motor 200 is fixedly arranged in the installation cavity 110. The central axis 300 is rotatably arranged in the installation cavity 110 through a radial bearing 2. One end of the central axis 300 is transmission-connected to the output end of the rotating motor 200, and the other end of the central axis 300 is transmission-connected to the main shaft 400. A rotating tool is installed at the end of the main shaft 400 away from the central axis 300.

[0032] Furthermore, the positioning glue-potting sleeve 1 is fixedly sleeved on the outer periphery of the radial bearing 2, and a glue-potting gap 3 is provided between the outer periphery of the positioning glue-potting sleeve 1 and the inner wall of the mounting cavity 110, and an adhesive layer 4 is provided in the glue-potting gap 3, and the adhesive layer 4 is used to bond the positioning glue-potting sleeve 1 to the inner wall of the mounting cavity 110. Specifically, the central axis transmission support structure provided in the present embodiment is provided with a positioning glue-potting sleeve 1 in the mounting cavity 110 of the sliding pillow 100, and the positioning glue-potting sleeve 1 is fixed to the outer periphery of the radial bearing 2, and a glue-potting gap 3 is provided between the positioning glue-potting sleeve 1 and the mounting cavity 110, and the adhesive layer 4 is filled in the glue gap to bond and fix the positioning glue-potting sleeve 1 in the sliding pillow 100, thereby greatly improving the installation stability of the radial bearing 2. Because the radial bearing 2 and the central axis 300 are connected by a transition fit, which is tightly connected in itself, the radial movement of the central axis 300 is also greatly reduced, thereby improving the processing stability and precision.

[0033] In this embodiment, the middle shaft 300 is an inertial shaft, which, on the one hand, serves to connect the rotating motor 200 and the main shaft 400, and on the other hand, through the design of shape and mass, makes the center of gravity of the entire rotating body coincide with the axis of rotation, thereby improving the stability of the rotation output.

[0034] For example, Figure 2 and Figure 3 As shown, the central shaft transmission support structure also includes two sealing rings 5, which are arranged side by side and spaced apart on the outer periphery of the positioning glue potting sleeve 1, and the two sealing rings 5 ​​are used to seal the gap between the outer periphery of the positioning glue potting sleeve and the inner wall of the installation cavity 110, so as to form a glue potting gap 3 between the two sealing rings 5. The two sealing rings 5 ​​not only effectively seal the gap between the positioning glue potting sleeve 1 and the inner wall of the installation cavity 110, but also form a glue potting gap 3 between the two sealing rings 5, which provides convenience for the subsequent glue potting operation and improves the accuracy and sealing of the glue potting process.

[0035] For example, Figure 3 As shown, two sealing grooves are provided on the outer periphery of the positioning rubber-potting sleeve 1, and the sealing grooves extend around the circumference of the positioning rubber-potting sleeve 1 to form a closed annular groove. Two sealing rings 5 ​​are correspondingly sleeved in the two sealing grooves to improve the installation stability and accuracy of the sealing rings 5.

[0036] Exemplarily, the sealing ring 5 is a Type O rubber sealing ring 5 .

[0037] For example, Figure 1 and Figure 4As shown, the ram 100 is provided with a glue inlet hole 120 and a glue outlet hole 130, which are connected to the glue filling gap 3 and the outside respectively. The glue inlet hole 120 is used to inject glue into the glue filling gap 3 to form a glue layer 4, and the glue layer 4 can overflow excess glue through the glue outlet hole 130. During the glue injection process, as the glue filling gap 3 is gradually filled, excess glue can smoothly overflow through the glue outlet hole 130, avoiding excessive accumulation and waste of glue in the gap. This function not only improves the efficiency of glue use, but also ensures the thickness and uniformity of the glue layer 4, further improving the performance of the overall structure.

[0038] For example, Figure 2 and Figure 3 As shown, two radial bearings 2 are provided, and the two radial bearings 2 are arranged side by side along the axis direction of the middle shaft 300. The stability and load-bearing capacity of the middle shaft transmission are effectively improved. This side-by-side layout can disperse the load and reduce the force on a single bearing, thereby extending the service life of the bearing, while ensuring that the middle shaft can still maintain a good operating state when rotating at high speed or subjected to large axial and radial forces.

[0039] For example, Figure 2 and Figure 3 As shown, the middle shaft transmission support structure also includes an intermediate bearing cover 6 and a front spacer 7. The intermediate bearing cover 6 is pressed against the inner ring of one radial bearing 2 from one side, and the front spacer 7 is pressed against the inner ring of the other radial bearing 2 from the other side. The intermediate bearing cover 6 and the front spacer 7 are pressed from both sides of the radial bearing 2, respectively, which effectively prevents the loosening or displacement of the bearing during operation, and improves the reliability and safety of the entire transmission system.

[0040] For example, Figure 2 and Figure 3 As shown, the middle shaft transmission support structure also includes a locking nut 8, the outer periphery of the middle shaft 300 is provided with an external threaded portion and a limiting step 310, and the front spacer 7 and the two radial bearings 2 are arranged between the external threaded portion and the limiting step 310. Not only does it simplify the installation process and ensure the precise positioning between the components, but it also provides additional support and limiting effects through the limiting step 310, preventing the axial movement of the bearing and the spacer, and further enhancing the stability of the structure.

[0041] For example, Figure 2 and Figure 3As shown, one end of the intermediate bearing cover 6 away from the radial bearing 2 abuts against the limiting step 310, the locking nut 8 is threadedly connected to the external threaded portion, and the locking nut 8 can push the side of the front spacer 7 away from the radial bearing 2, so that the front spacer 7 and the intermediate bearing cover 6 can clamp the two radial bearings 2 together. When the locking nut 8 is tightened toward the radial bearing 2, the locking nut 8 pushes the front spacer 7 to gradually press the radial bearing 2, and the radial bearing 2 also pushes the intermediate bearing cover 6 to press against the limiting step 310. Under the reverse force of the intermediate bearing cover 6, the two radial bearings 2 are clamped from both sides, thereby improving the installation stability of the radial bearing 2 in the axial direction.

[0042] For example, the radial bearing 2 is an angular contact ball bearing.

[0043] For example, Figure 2 As shown, the central shaft transmission support structure also includes a motor mounting plate 9, a first transition ring 10 and a second transition ring 11. The motor mounting plate 9 is fixedly installed in the mounting cavity 110 by screws, and the rotating motor 200 is installed on the motor mounting plate 9. The first transition ring 10 is fixedly installed on the inner wall of the mounting cavity 110 by screws, and the second transition ring 11 is fixedly installed on the motor mounting plate 9 by screws. The second transition ring 11 is tightly sleeved on the first transition ring 10, thereby improving the installation stability of the motor mounting plate 9, and then improving the installation reliability of the rotating motor 200, adjusting the installation gap, and preventing rotational friction between the rotating motor 200 and the slide 100.

[0044] Exemplarily, the adhesive layer 4 is made of positioning glue, which is specifically a two-liquid mixed hardening glue suitable for bonding between metal materials.

[0045] For example, Figure 2 As shown, the main shaft 400 is rotatably disposed in the installation cavity 110 , the main shaft 400 is transmission-connected to the central shaft 300 through the coupling 13 , and the central shaft 300 is transmission-connected to the output shaft of the rotating motor 200 through the expansion sleeve 12 .

[0046] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A central shaft transmission support structure, characterized in that: include: A ram (100), wherein a mounting cavity (110) is provided in the ram (100); A rotating motor (200) is fixedly disposed in the installation cavity (110); A central shaft (300) is rotatably disposed in the mounting cavity (110) via a radial bearing (2), one end of the central shaft (300) being transmission-connected to an output end of the rotating motor (200), and the other end of the central shaft (300) being transmission-connected to a main shaft (400); A positioning glue-potting sleeve (1), wherein the positioning glue-potting sleeve (1) is fixedly sleeved on the outer periphery of the radial bearing (2), a glue-potting gap (3) is provided between the outer periphery of the positioning glue-potting sleeve (1) and the inner wall of the mounting cavity (110), an adhesive layer (4) is provided in the glue-potting gap (3), and the adhesive layer (4) is used to bond the positioning glue-potting sleeve (1) to the inner wall of the mounting cavity (110).

2. A central shaft transmission support structure according to claim 1, characterized in that: The central shaft transmission support structure further comprises two sealing rings (5), the two sealing rings (5) being arranged side by side and spaced apart on the outer periphery of the positioning glue-potting sleeve (1), the two sealing rings (5) being used to seal the gap between the outer periphery of the positioning glue-potting sleeve and the inner wall of the installation cavity (110), so as to form the glue-potting gap (3) between the two sealing rings (5).

3. A central shaft transmission support structure according to claim 2, characterized in that: The ram (100) is provided with a glue inlet hole (120) and a glue outlet hole (130), the glue inlet hole (120) and the glue outlet hole (130) respectively connecting the glue injection gap (3) with the outside, the glue inlet hole (120) is used to inject glue into the glue injection gap (3) to form the glue layer (4), and the glue layer (4) can overflow excess glue through the glue outlet hole (130).

4. The middle shaft transmission support structure according to claim 1, characterized in that: Two radial bearings (2) are provided, and the two radial bearings (2) are arranged side by side along the axial direction of the central shaft (300).

5. A central shaft transmission support structure according to claim 4, characterized in that: The central shaft transmission support structure also includes an intermediate bearing cover (6) and a front spacer (7), wherein the intermediate bearing cover (6) is pressed against the inner ring of one of the radial bearings (2) from one side, and the front spacer (7) is pressed against the inner ring of the other radial bearing (2) from the other side.

6. A central shaft transmission support structure according to claim 5, characterized in that: The central shaft transmission support structure also includes a locking nut (8); the outer periphery of the central shaft (300) is provided with an external threaded portion and a limiting step (310); the front sleeve (7) and the two radial bearings (2) are both arranged between the external threaded portion and the limiting step (310); the end of the intermediate bearing cover (6) away from the radial bearing (2) abuts against the limiting step (310); the locking nut (8) is threadedly connected to the external threaded portion, and the locking nut (8) can push the side of the front sleeve (7) away from the radial bearing (2), so that the front sleeve (7) and the intermediate bearing cover (6) can clamp the two radial bearings (2) together.

7. A central shaft transmission support structure according to any one of claims 1 to 6, characterized in that: The central shaft transmission support structure also includes a motor mounting plate (9), a first transition ring (10) and a second transition ring (11); the motor mounting plate (9) is fixed in the mounting cavity (110); the rotating motor (200) is mounted on the motor mounting plate (9); the first transition ring (10) is fixed to the inner wall of the mounting cavity (110); the second transition ring (11) is fixed to the motor mounting plate (9); and the second transition ring (11) is tightly sleeved on the first transition ring (10).

8. The central shaft transmission support structure according to claim 1, characterized in that: The adhesive layer (4) is made of positioning adhesive.

9. The central shaft transmission support structure according to claim 1, characterized in that: The main shaft (400) is rotatably disposed in the installation cavity (110), and the main shaft (400) is transmission-connected to the central shaft (300) via a coupling (13).

10. A central shaft transmission support structure, characterized in that: It comprises a machine tool body and a transmission system, wherein the transmission system is installed on the machine tool body, the transmission system comprises a central axis transmission support structure as described in any one of claims 1 to 9, the slide (100) is arranged on the machine tool body along a straight line sliding manner, and a rotating tool is installed on the end of the main shaft (400) away from the central shaft (300).

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