Reinforcing mechanism for spindle seat of vertical machining center

Abstract

The invention provides a reinforcing mechanism for a spindle seat of a vertical machining center, and mainly relates to the technical field of machining equipment. The reinforcing mechanism of the vertical machining center spindle seat comprises a fixing seat, a driving device is fixedly installed in the fixing seat, a fastening mechanism is movably installed in the fixing seat, the fixing seat is fixedly installed on the machining center spindle seat, and a cavity for the fastening mechanism to move is formed in the fixing seat. By means of the improved reinforcing mechanism structural design, for example, through the adjusting effects of a connecting rod, a rotating base, a lead screw and the like, flexible installation and adjustment can be achieved for different main shaft bases, the applicability is good, multi-direction simultaneous electric control clamping and fastening are achieved through a driving disc, a clamping sleeve assembly and the like, installation and adjustment operation is very convenient and fast, and the practicability is high. And vibration impact is effectively absorbed through a buffer mechanism arranged in the main shaft seat, the strength and durability of the main shaft seat are improved, the stable machining effect of the machining center is maintained, and it is guaranteed that production and machining work is conducted orderly.

Description

Technical Field

[0001] This invention mainly relates to the field of machining equipment technology, specifically a reinforcing mechanism for the spindle seat of a vertical machining center. Background Technology

[0002] Vertical machining centers are important pieces of equipment used in mechanical processing. Their spindle heads are key components supporting the high-speed rotation of the internal spindle sleeve. They must simultaneously withstand static loads (such as the weight of the spindle and cutting tool) and dynamic loads (such as cutting forces, centrifugal forces generated by the high-speed spindle rotation, and vibration loads). The rigidity and stability of the spindle head directly affect the machining accuracy and service life of the machining center. During the operation of a vertical machining center, the high-speed rotation of the internal spindle sleeve generates significant centrifugal forces and vibrations. Simultaneously, the cutting forces from the tool and workpiece are also transmitted to the spindle head, easily leading to deformation and vibration, affecting machining accuracy and efficiency, and even shortening the service life of the spindle head and related components. In the prior art, in order to improve the rigidity of the spindle seat, reinforcing ribs are usually set on the spindle seat. The reinforcing ribs can effectively improve the rigidity of the part, but they do not have the function of absorbing vibration and impact. They cannot effectively absorb and slow down vibration, and it is difficult to effectively offset or absorb forces and vibrations in multiple directions. After long-term use, stress concentration is still likely to occur at the connection, leading to fatigue damage. At best, it will affect the stability of machining accuracy and the angle of the product. At worst, it will affect the orderly progress of machining work and make it impossible to continue processing and production. Existing technologies also have some spindle seat reinforcement mechanisms that can effectively strengthen the spindle seat, but they have the following drawbacks: some spindle seat reinforcement mechanisms do not have a damping structure and therefore cannot absorb the vibration and impact during the rotation of the spindle sleeve; some spindle seat reinforcement mechanisms with damping structures have poor structural design and cannot effectively absorb vibration and impact; due to the difference in spindle sleeve diameters between different models of machining centers (usually in the range of φ50-φ200mm), existing fixed-size reinforcement mechanisms are difficult to be compatible and need to be designed separately for different specifications, making it impossible to flexibly adjust to fit spindle seats with different spindle sleeve diameters, increasing manufacturing costs and management complexity, and the ease of use needs to be improved.

[0003] Therefore, it is necessary to design a new type of reinforcing mechanism for the spindle seat of a vertical machining center to solve the above problems. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a reinforcing mechanism for the spindle seat of a vertical machining center. Through an improved structural design, such as adjusting via connecting rods, rotating seats, and lead screws, it enables flexible installation and adjustment for different spindle seats, offering good applicability. Multi-directional simultaneous electrically controlled clamping is achieved through a drive disc and clamping assembly, making installation and adjustment operations extremely convenient. Furthermore, the included buffer mechanism effectively absorbs vibration and impact, improving the strength and durability of the spindle seat, maintaining stable machining results, and ensuring the orderly progress of production and processing.

[0005] To achieve the above objectives, the present invention employs the following technical solution: A reinforcing mechanism for a vertical machining center spindle seat includes a fixed seat, in which a driving device is fixedly installed, and in which a fastening mechanism is movably installed. The fixed seat is fixedly installed on the machining center spindle seat, and a cavity is provided in the fixed seat for the fastening mechanism to move. The fastening mechanism includes a C-shaped frame, which is slidably installed in a fixed seat. A pull rod is fixedly connected to the C-shaped frame. A buffer mechanism is provided in the C-shaped frame. A connecting rod is rotatably installed on the buffer mechanism. A clamping assembly is rotatably connected to the connecting rod. The clamping assembly includes an arc-shaped clamping plate, the inner side of which is provided with an anti-slip layer, and a rotating seat is fixedly connected to the outer side of which a connecting rod is rotatably connected. A threaded hole is provided in the rotating seat, and a lead screw is installed in the threaded hole.

[0006] The driving device includes a drive motor, a transmission device, and a drive disk. The drive motor is fixedly installed in a fixed base, and the transmission device is fixedly installed in the fixed base. The transmission device is a worm gear drive mechanism. The output shaft of the drive motor is connected to the transmission device. The worm gear of the transmission device is connected to the drive disk. The drive disk is rotatably installed in the fixed base. The drive disk has several drive slots. The pull rod passes through the drive slots and slides in contact with their inner side.

[0007] The outer edge of the drive disc has tooth grooves adapted to the worm gear of the transmission device.

[0008] The upper and lower parts of the C-shaped frame are respectively provided with cavities. The buffer mechanism includes a spring and a slider. The spring is fixedly installed in one side of the cavity and is fixedly connected to one side of the slider. The slider is slidably installed in the cavity.

[0009] The lead screw includes a unidirectional lead screw and a bidirectional lead screw. The bidirectional lead screw is provided with an adjustment block, and the adjustment block has an adjustment hole.

[0010] Compared with the prior art, the beneficial effects of the present invention are: High flexibility and applicability: Through the cooperation of connecting rod, rotating seat and lead screw, the position and angle of the arc-shaped clamp can be flexibly adjusted to adapt to the main shaft sleeves of different diameters, thus expanding the range of applications; Easy to operate: Multi-directional synchronous electric clamping is achieved with the help of drive motor, transmission device and drive plate, eliminating the need for manual operation and simplifying the installation and adjustment process; Excellent shock absorption: Through the cooperation of spring and slider in the buffer mechanism, the vibration and impact generated by the operation of the spindle sleeve are effectively absorbed, stress concentration is reduced, fatigue damage is delayed, and the strength and durability of the spindle seat are improved. Ensuring machining stability: By improving the rigidity and vibration damping capacity of the spindle mount, the machining accuracy of the machining center is maintained, ensuring orderly production. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a first-view schematic diagram of the internal structure of the present invention; Figure 3 This is a second-view schematic diagram of the internal structure of the present invention; Figure 4 This is the present invention. Figure 3 A partially enlarged structural diagram of section A in the middle; Figure 5 This is a schematic diagram of the structure of the present invention with only the upper fastening mechanism.

[0012] The following are the reference numerals in the attached diagram: 1. Fixed base; 2. Drive device; 3. Fastening mechanism; 21. Drive motor; 22. Transmission device; 23. Drive disc; 24. Drive groove; 33. C-shaped frame; 34. Pull rod; 35. Buffer mechanism; 36. Connecting rod; 330. Cavity; 351. Spring; 352. Slider; 41. Arc-shaped clamp; 42. Rotating seat; 43. Lead screw; 431. One-way lead screw; 432. Two-way lead screw; 433. Adjusting block. Detailed Implementation

[0013] The present invention will be further described in conjunction with the accompanying drawings and specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the invention, and these equivalent forms also fall within the scope defined in this application.

[0014] Combined with appendix Figures 1-5A reinforcing mechanism for a vertical machining center spindle seat includes a fixed seat 1, a driving device 2 fixedly installed in the fixed seat 1, a fastening mechanism 3 movably installed in the fixed seat 1, the fixed seat 1 being fixedly installed on the machining center spindle seat, and a cavity for the fastening mechanism 3 to move in the fixed seat 1. The fastening mechanism 3 includes a C-shaped frame 33, which is slidably installed in the fixed base 1. A pull rod 34 is fixedly connected in the C-shaped frame 33. A buffer mechanism 35 is provided in the C-shaped frame 33. A connecting rod 36 is rotatably installed in the buffer mechanism 35. A clamping assembly is rotatably connected to the connecting rod 36. The sliding direction of the C-shaped frame 33 in the fixed base 1 is towards or away from the axis of the main sleeve.

[0015] The jacket assembly includes an arc-shaped clamping plate 41, with an anti-slip layer on the inner side of the arc-shaped clamping plate 41. A rotating seat 42 is fixedly connected to the outer side of the arc-shaped clamping plate 41, and a connecting rod 36 is rotatably connected to the rotating seat 42. A threaded hole is opened in the rotating seat 42, and a lead screw 43 is installed in the threaded hole. The anti-slip layer is made of nitrile rubber with a Shore hardness of 60-70HA, which ensures a sufficient coefficient of friction (static coefficient of friction ≥0.8) to prevent slippage, and also increases the contact area with the main sleeve through the elastic deformation of the rubber.

[0016] The driving device 2 includes a drive motor 21, a transmission device 22, and a drive disk 23. The drive motor 21 is fixedly installed in the fixed base 1. The transmission device 22 is fixedly installed in the fixed base 1. The transmission device 22 is a worm gear structure driving mechanism. The output shaft of the drive motor 21 is connected to the transmission device 22. The worm gear of the transmission device 22 is connected to the drive disk 23. The drive disk 23 is rotatably installed in the fixed base 1. The drive disk 23 has several drive slots 24. The pull rod 34 passes through the drive slots 24 and slides in contact with their inner side. The drive groove 24 is a groove whose distance from the center of the drive disk 23 changes continuously; several drive grooves 24 are arranged symmetrically about the center of the drive disk 23, and each drive groove 24 corresponds to a set of C-shaped frames 33 and their connecting components; the transmission device 22 includes a fixed frame, which is fixedly connected to the fixed base 1. The drive shaft of the drive motor 21, the intermediate shaft for transmission, and the output shaft connected to the worm gear structure are rotatably mounted on the fixed frame. Two transmission gears are provided on the intermediate shaft, which mesh with the gears on the drive shaft and the output shaft respectively; the transmission device 22 has the function of reducing the rotational speed and increasing the rotational torque through the meshing of gears with different gear ratios. The transmission method used in this solution is a conventional transmission solution in the mechanical industry. The specific transmission gear ratio parameters are not described here.

[0017] The outer edge of the drive disk 23 has toothed grooves that are compatible with the worm gear of the transmission device 22. The worm gear transmission structure formed by the worm gear and the drive disk 23 can automatically lock the rotation angle position of the drive disk 23 when it is not working, so as to maintain the fastening state of the fastening mechanism 3 when it is not driven. When the worm gear makes the drive disk 23 rotate, since the distance between the drive groove 24 and the center of the drive disk 23 / the axis of the main shaft sleeve changes continuously, and the C-shaped frame 33 can only move towards or away from the axis of the main shaft sleeve, the rotation of the drive disk 23 can simultaneously drive several C-shaped frames 33 to move synchronously towards or away from the axis of the main shaft sleeve.

[0018] The upper and lower parts of the C-shaped frame 33 are respectively provided with cavities 330. The buffer mechanism 35 includes a spring 351 and a slider 352. The spring 351 is fixedly installed on one side of the cavity 330, and the spring 351 is fixedly connected to one side of the slider 352. The slider 352 is slidably installed in the cavity 330. The spring 351 is a cylindrical helical compression spring, and the material is 60Si2Mn (spring steel, which has high elastic limit and fatigue strength). It is designed according to the maximum vibration load of the spindle sleeve, and its stiffness coefficient is 500-800N / mm, and its working stroke is 10-20mm, so as to effectively enhance the support effect of the spindle seat on the spindle sleeve and absorb vibration energy, and enhance the support stability of the spindle seat on the spindle sleeve.

[0019] The lead screw 43 includes a one-way lead screw 431 and a two-way lead screw 432. The two-way lead screw 432 is provided with an adjusting block 433, and the adjusting block 433 has an adjusting hole. The adjusting hole of the adjusting block 433 is used to insert tools such as pry bars to rotate the adjusting lead screw 43, improving the ease of operation. This device has two usage schemes. For different lengths of the main shaft sleeve, for the usage scenario where the main shaft sleeve is longer, the buffer mechanism 35, connecting rod 36, arc-shaped clamp 41 and rotating seat 42 are symmetrically arranged in two sets about the fixed seat 1. The two rotating seats 42 are connected by the two-way lead screw 432. For the usage scenario where the main shaft sleeve is shorter, only the buffer mechanism and other components on one side (upper side) are set, and the one-way lead screw 431 is used. The lower end of the one-way lead screw 431 is rotatably mounted on the fixed seat 1. By cooperating with the lead screw 43 (which uses the principle of helical transmission to convert rotational motion into linear motion) and the rotating seat 43, the radial position of the arc-shaped clamp 41 can be precisely adjusted. Combined with the angle change of the connecting rod 36 (based on the motion characteristics of the planar connecting rod mechanism), it can achieve compatibility with main bushings of different diameters within the range of φ50-φ200mm without the need for customized design.

[0020] This device is also connected to a control device (not shown in the figure) via wires. The control device is a microcontroller-based control device. Electrical equipment in the device, such as the drive motor 21, is electrically connected to the control device. The control device has several control buttons, and the operator can control the operation of the device through the control buttons. The bottom of the fixed base 1 has a wire hole for the connecting wires to pass through.

[0021] When using this device, firstly, select a suitable fixed base 1 and lead screw 43 according to the usage scenario, and fix the device on the spindle seat. Control the C-shaped frame 33 to move to the position furthest from the center of the spindle sleeve through the control device. Connect the lead screw 43 to the rotating seat 42 through threads. Rotate the lead screw 43 to adjust the angle of the connecting rod 36 until the arc-shaped clamp 41 is tightly attached to the outside of the spindle sleeve to match the diameter of the spindle sleeve. Control the C-shaped frame 33 to move closer to the center of the spindle sleeve through the control device, so that the spring 351 is fully compressed, pressing the clamping assembly and securing the spindle sleeve, thus fully absorbing the vibration of the rotating shaft inside the spindle sleeve during operation.

[0022] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A reinforcing mechanism for a spindle seat of a vertical machining center, comprising a fixed seat (1), wherein a driving device (2) is fixedly installed in the fixed seat (1), and a fastening mechanism (3) is movably installed in the fixed seat (1), characterized in that: The fixed seat (1) is fixedly installed on the spindle seat of the machining center, and the fixed seat (1) has a cavity for the fastening mechanism (3) to move. The fastening mechanism (3) includes a C-shaped frame (33), which is slidably installed in the fixed seat (1). A pull rod (34) is fixedly connected in the C-shaped frame (33). A buffer mechanism (35) is provided in the C-shaped frame (33). A connecting rod (36) is rotatably installed in the buffer mechanism (35). A clip assembly is rotatably connected to the connecting rod (36). The jacket assembly includes an arc-shaped clamp (41), the inner side of which is provided with an anti-slip layer, and a rotating seat (42) is fixedly connected to the outer side of the arc-shaped clamp (41). A connecting rod (36) is rotatably connected to the rotating seat (42), and a threaded hole is provided in the rotating seat (42), in which a lead screw (43) is installed.

2. The reinforcing mechanism for a vertical machining center spindle support according to claim 1, characterized in that: The drive device (2) includes a drive motor (21), a transmission device (22), and a drive disk (23). The drive motor (21) is fixedly installed in a fixed base (1). The transmission device (22) is fixedly installed in the fixed base (1). The transmission device (22) is a drive mechanism with a worm gear structure. The output shaft of the drive motor (21) is connected to the transmission device (22) for transmission. The worm gear of the transmission device (22) is connected to the drive disk (23) for transmission. The drive disk (23) is rotatably installed in the fixed base (1). The drive disk (23) has several drive slots (24). The pull rod (34) passes through the drive slots (24) and slides in contact with their inner side.

3. The reinforcing mechanism for a vertical machining center spindle support according to claim 1, characterized in that: The outer edge of the drive disk (23) has tooth grooves that are adapted to the worm gear of the transmission device (22).

4. The reinforcing mechanism for a vertical machining center spindle support according to claim 1, characterized in that: The upper and lower parts of the C-shaped frame (33) are respectively provided with cavities (330). The buffer mechanism (35) includes a spring (351) and a slider (352). The spring (351) is fixedly installed on one side of the cavity (330). The spring (351) is fixedly connected to one side of the slider (352). The slider (352) is slidably installed in the cavity (330).

5. The reinforcing mechanism for a vertical machining center spindle support according to claim 1, characterized in that: The lead screw (43) includes a unidirectional lead screw (431) and a bidirectional lead screw (432). The bidirectional lead screw (432) is provided with an adjustment block (433), and the adjustment block (433) has an adjustment hole.

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