Main shaft module and drilling machine tool thereof

Abstract

The utility model discloses a main shaft module and a drilling machine tool. The main shaft module comprises a fixed bottom plate, a linear guide rail, a movable assembly, a spring assembly and a suspension device. The linear guide rail, the movable assembly and the spring assembly are all arranged on the front face of the bottom plate and located on the same vertical plane, the distance between the center of the movable assembly and the plane of the guide rail is greatly reduced, the rigidity of a machine tool is greatly improved, and then the drilling precision is improved. The movable component adopts a structural form of a secondary bottom plate, a main shaft connecting rod, a main shaft and a linear sliding rail, and the transmission action is stable; parts such as a back plate and a holding clamp are reduced, the size is reduced, the weight is reduced, the space utilization rate of a machine tool is improved, the equipment cost is reduced, and the power required by the motor for obtaining the acceleration at the same level is reduced. Besides, the spring assembly is designed to be used for balancing the gravity of the movable assembly, meanwhile, the accelerated speed of the main shaft during cutter returning is increased, and reciprocating motion of the movable assembly is more stable and smoother.

Description

Technical Field

[0001] The utility model relates to drilling equipment, in particular to a main shaft module and a drilling machine tool comprising the main shaft module. Background Art

[0002] PCB mechanical drilling machines are the mainstream processing equipment in the PCB drilling industry, offering excellent drilling accuracy and efficiency. In recent years, with the transformation of the PCB industry's product mix, the proportion of high-tech products such as HDI boards, flexible boards, and package carrier boards has increased year by year. These types of boards require higher hole density and precision.

[0003] Traditional PCB mechanical drilling machines can improve processing efficiency by upgrading their spindles to higher-speed drilling spindles to adapt to the new board market. However, the Z-axis motor and guide rails of traditional PCB drilling machines are typically secured to the back of the backplate via clamps, resulting in a large distance between the drilling center and the guide rail plane. The tipping force during drilling significantly affects the accuracy of small holes. Furthermore, the drilling motion components are bulky and heavy, resulting in high motor power consumption at the same acceleration. This lacks structural compactness, reduces machine space utilization, and increases equipment costs. Utility Model Content

[0004] In order to overcome the shortcomings of the existing technology, one of the purposes of the present invention is to provide a spindle module, and the second purpose is to provide a drilling machine tool including such a spindle module, which can solve the problems of low precision, large size, high energy consumption and high cost existing in traditional small hole drilling machines.

[0005] The utility model is realized by the following technical solutions:

[0006] The transmission mechanism is that the cam is fixed on the support frame and the transmission mechanism is hinged on the support frame, is fixed on the support frame, and the transmission mechanism is hinged on the support frame, is fixed on the support frame, and the transmission mechanism is hinged on the support frame, is fixed on the support frame

[0007] Furthermore, the spring assembly also includes: a spring movable seat; the spring movable seat is fixed to the secondary base plate so that the two ends of the spring are respectively fixed to the spring movable seat and the spring fixed seat; when the main shaft moves downward, the spring has a compression movement tendency.

[0008] Furthermore, a through hole is provided on the spring fixed seat; the spring movable seat has a top seat and a connecting rod fixed to the bottom of the top seat; the connecting rod of the spring movable seat passes through the through hole of the spring fixed seat and is fixedly connected to the secondary base plate, the upper end of the spring abuts against the top seat of the spring movable seat, the lower end of the spring is fixed in the through hole of the spring fixed seat, and the connecting rod of the spring movable seat passes through the inner hole of the spring.

[0009] Furthermore, the spindle module also includes a piston assembly, which includes: a piston connecting plate and a pair of parallel pistons; the pistons are distributed on both sides of the suspension device, the piston connecting plate is simultaneously fixed to the same end of the two pistons, and the spindle connecting rod is fixed to the piston connecting plate; the piston connecting plate is also fixedly connected to the spindle.

[0010] Furthermore, the main shaft connecting rod includes: a rod body and a sphere arranged at the end of the rod body, a hemispherical groove is opened on the piston connecting plate, and the diameter of the hemispherical groove is larger than the diameter of the sphere; the ball head is installed in the hemispherical groove so that the main shaft connecting rod and the piston connecting plate form a universal joint structure.

[0011] Furthermore, the piston assembly further includes: a pressure plate; the pressure plate is fixed to the piston connecting plate; the rod body of the main shaft connecting rod is passed through the pressure plate, and the main shaft connecting rod is fixedly connected to the pressure plate.

[0012] Furthermore, the suspension device comprises: a suspension sleeve; a suspension through-hole is provided in the suspension sleeve, and the main shaft is passed through the suspension through-hole; and a plurality of radial micro-holes are provided on the inner wall of the suspension through-hole.

[0013] Furthermore, the spindle module also includes: an encoder; the encoder includes a reading head and a grating belt or a magnetic grating belt, the reading head is fixed on the front of the base plate and is located on the outside of the guide rail, the grating belt or the magnetic grating belt is fixedly connected to the secondary base plate and placed between the reading head and the guide rail.

[0014] Furthermore, the spindle module also includes: a chip suction cover; the chip suction cover is sleeved on the lower end of the spindle and fixed to the pistons on both sides.

[0015] A drilling machine tool comprises the spindle module described in any one of the items.

[0016] Compared with the prior art, the present invention can achieve the following beneficial effects:

[0017] During operation, the spindle motor starts, and the motor stator drives the motor mover to slide up and down, driving the secondary base plate to follow the slider along the linear guide. At the same time, the secondary base plate drives the spindle connecting rod and the spindle up and down, and the spindle floats flexibly along its axis within the suspension device, achieving high-speed drilling action.

[0018] (1) The linear guide rail, movable assembly, and spring assembly are all located on the front of the base plate and on the same vertical plane, which greatly reduces the distance between the center of the movable assembly and the guide rail plane, greatly improving the rigidity of the machine tool and thereby improving the drilling accuracy.

[0019] (2) The movable component adopts the structure of secondary base plate, spindle connecting rod, spindle and linear slide rail, and its transmission action is smooth; the back plate and clamp parts are reduced, the volume and weight are reduced, the space utilization of the machine tool is improved, the equipment cost is reduced, and the power required for the motor to obtain the same level of acceleration is reduced.

[0020] (3) By designing a spring assembly, the gravity of the movable assembly is balanced, the acceleration of the spindle during tool return is increased, and the reciprocating motion of the movable assembly is made smoother and more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 Shown is a three-dimensional schematic diagram of the utility model;

[0022] Figure 2 Shown is an exploded schematic diagram of the piston assembly;

[0023] Figure 3 Shown Figure 2 Front view of .

[0024] In the figure: 10, fixed base plate; 20, linear guide; 30, motor stator; 40, motor mover; 50, secondary base plate; 60, spindle connecting rod; 61, rod body; 62, sphere; 70, spindle; 80, spring; 90, spring fixing seat; 100, suspension device; 110, spring movable seat; 120, piston connecting plate; 130, piston; 140, pressure plate; 150, encoder; 160, chip suction cover. DETAILED DESCRIPTION

[0025] Below, the present invention is further described in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0026] In the description of the present invention, it should be understood that the terms "center", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0027] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" means two or more, unless otherwise specifically defined.

[0028] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and can refer to internal communication between two components or the interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0029] The utility model discloses a spindle module, which is particularly used for a PCB drilling machine tool.

[0030] See Figure 1 This spindle module includes a fixed base plate 10, a drive motor, linear guide rails 20, a movable assembly, a spring assembly, and a suspension device 100. The fixed base plate 10 provides a mounting support for the module. The drive motor includes a driver, a motor stator 30, and a motor mover 40. When the motor stator 30 is energized, it can drive the motor mover 40 under the control of the driver. The slide rail portion of the linear guide rail 20 is fixedly mounted on the front of the fixed base plate 10. The motor stator 30 is also fixedly mounted on the front of the fixed base plate 10 and is located between the two linear guide rails 20.

[0031] The movable assembly specifically includes the aforementioned motor mover 40, secondary base plate 50, spindle connecting rod 60, and spindle 70. The middle portion of the bottom surface of the secondary base plate 50 is fixed to the motor mover 40, while the sides of its bottom surface are fixed to the sliders of the linear guide 20. The spindle connecting rod 60 has its upper end fixedly connected to the secondary base plate 50 and its lower end fixedly connected to the spindle 70. This allows the secondary base plate 50 to drive the spindle 70 in reciprocating upward and downward sliding motion. The spindle 70 is movably disposed within the suspension device 100.

[0032] The spring assembly specifically includes: a spring 80 and a spring fixing seat 90; the spring fixing seat 90 is fixedly mounted on the fixed base plate 10 and located above the secondary base plate 50, and both ends of the spring 80 are respectively fixed to the secondary base plate 50 and the spring fixing seat 90.

[0033] The movable assembly and the spring assembly are arranged on the same vertical plane and are both located on the front side of the fixed base plate 10 .

[0034] During operation, the spindle motor starts, and the motor stator 30 drives the motor mover 40 to slide up and down, driving the secondary base plate 50 to follow the slider and slide along the linear guide 20. At the same time, the secondary base plate 50 drives the spindle connecting rod 60 and the spindle 70 to move up and down. The spindle 70 floats flexibly along its axis within the suspension device 100, achieving high-speed drilling.

[0035] (1) The linear guide rail 20, the movable assembly, and the spring assembly are all arranged on the front surface of the base plate and are located on the same vertical plane, which greatly reduces the distance between the center of the movable assembly and the guide rail plane, greatly improving the rigidity of the machine tool and thereby improving the drilling accuracy.

[0036] (2) The movable assembly adopts the structural form of a secondary base plate 50, a spindle connecting rod 60, a spindle 70 and a linear guide rail, and its transmission action is smooth; the back plate and clamping parts are reduced, the volume is reduced, the weight is reduced, the space utilization of the machine tool is improved, the equipment cost is reduced, and the power required for the motor to obtain the same level of acceleration is reduced.

[0037] (3) By designing a spring assembly, the gravity of the movable assembly is balanced, the acceleration of the spindle 70 when returning the tool is increased, and the reciprocating motion of the movable assembly is made smoother and more stable.

[0038] Preferably, see Figure 1The spring assembly also includes a spring movable seat 110. The spring movable seat 110 is fixedly connected to the secondary base plate 50, and the ends of the spring 80 are respectively fixed to the spring movable seat 110 and the spring fixed seat 90. When the spindle 70 moves downward to drill, the spring movable seat 110 descends with the secondary base plate 50, compressing the spring 80 and generating elastic potential energy. When the spindle 70 moves upward to return the tool, the spring 80 expands and releases its elastic potential energy. The spring movable seat 110 and the spring fixed seat 90 respectively secure the ends of the spring 80, ensuring stable compression and release of the spring 80.

[0039] Further preferably, a through hole is provided on the spring fixed seat 90, and the spring movable seat 110 has a top seat and a connecting rod fixed to the bottom of the top seat; the connecting rod of the spring movable seat 110 passes through the through hole of the spring fixed seat 90 and is fixedly connected to the secondary base plate 50, the upper end of the spring 80 abuts against the top seat of the spring movable seat 110, and the lower end of the spring 80 is fixed in the through hole of the spring fixed seat 90, and the connecting rod of the spring movable seat 110 passes through the inner hole of the spring 80. In this way, when the main shaft 70 moves downward, the spring movable seat 110 descends with the secondary base plate 50, and its top seat compresses the spring 80. Through this structural arrangement, the compression and release of the spring 80 are stable. At the same time, the relative positional relationship between the spring movable seat 110, the spring 80, and the spring fixed seat 90 makes the structure of the spring assembly compact, reducing the space occupancy rate of the machine tool.

[0040] To effectively guide the movement of the main shaft 70, the present invention also includes a piston assembly. This assembly comprises a piston connecting plate 120 and a pair of parallel pistons 130. The two pistons 130 are located on either side of the suspension device 100. The bottom surfaces of the piston connecting plates 120 are fixed to the same end of both pistons 130. The main shaft connecting rod 60 is fixedly connected to the piston connecting plates 120. The piston connecting plates 120 are also fixedly connected to the main shaft 70. When the main shaft 70 moves up and down, it drives the piston connecting plates 120 up and down, thereby pulling or pushing the piston rods of the two pistons 130.

[0041] More preferably, see Figure 2-Figure 3 The spindle connecting rod 60 includes a rod body 61 and a sphere 62 provided at the end of the rod body 61. Correspondingly, a hemispherical groove is provided on the piston connecting plate 120, and the diameter of the hemispherical groove is larger than the diameter of the sphere 62; the ball head is installed in the hemispherical groove so that the spindle connecting rod 60 and the piston connecting plate 120 form a universal joint structure. The universal joint structure can eliminate the influence of part processing errors on the coaxiality between the axis of the spindle 70 and the spindle connecting rod 60, and allow the different axiality between the axis of the spindle 70 and the spindle connecting rod 60 to a greater extent. The deformation of the spindle connecting rod 60 is reduced, and the installation convenience and strength are improved.

[0042] Furthermore, in order to improve the connection stability between the main shaft connecting rod 60 and the piston connecting plate 120, the piston assembly further includes a pressure plate 140. The pressure plate 140 is fixed to the piston connecting plate 120, and the rod body 61 of the main shaft connecting rod 60 is passed through and fixed to the bottom plate.

[0043] Specifically, the suspension device 100 uses a suspension sleeve with a suspension through-hole inside. The spindle 70 is inserted into the suspension through-hole. The inner wall of the suspension through-hole is provided with a large number of radial micro-holes. The size of these through-holes is optimized to ensure a gap between the size of the through-holes and the position of the spindle 70. This ensures that the suspension sleeve has optimal rigidity when supporting the spindle 70. Before the spindle 70 moves, air is supplied from the outside to the suspension sleeve, allowing the spindle 70 to float flexibly along its axis within the suspension sleeve.

[0044] Of course, in other embodiments, the suspension device 100 may also adopt an air-floating guide rail, or other air-floating devices commonly used in the field of the main shaft 70 .

[0045] Preferably, the present invention further includes an encoder 150 for monitoring and locating the position of the spindle 70. The encoder 150 includes a readhead and a grating strip or a magnetic strip. The readhead is fixed to the front of the fixed base plate 10 and is located outside the linear guide 20. The grating strip or the magnetic strip is fixedly connected to the secondary base plate 50 and is placed between the readhead and the linear guide 20.

[0046] Preferably, the present invention further comprises a chip suction cover 160 for sucking chips generated during drilling. The chip suction cover 160 is sleeved on the lower end of the main shaft 70 and fixed to the pistons 130 on both sides.

[0047] The present invention also discloses a drilling machine tool comprising any of the above spindle modules. Any drilling machine tool that uses the same or substantially the same spindle module should fall within the scope of protection of the present invention.

[0048] The above-mentioned embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and replacements made by technicians in this field on the basis of the present invention fall within the scope of protection required by the present invention.

Claims

1. A spindle module, characterized in that: include: Fixed bottom plate; A linear guide rail is fixed on the front surface of the fixed base plate; The motor stator is fixed on the front side of the fixed base plate; The movable assembly includes: a motor mover, a secondary base plate, a spindle connecting rod, and a spindle; the motor mover is driven by the motor stator to slide up and down, the secondary base plate is fixed to the motor mover and the slider of the linear guide rail, and the two ends of the spindle connecting rod are respectively fixed to the secondary base plate and the spindle, so that the secondary base plate drives the spindle to move up and down; The spring assembly comprises: a spring and a spring fixing seat, wherein the spring fixing seat is fixed above the secondary base plate, and two ends of the spring are respectively fixed to the spring fixing seat and the secondary base plate; a suspension device, wherein the main shaft is movably arranged in the suspension device; The movable assembly and the spring assembly are arranged on the same vertical plane.

2. The spindle module according to claim 1, wherein: The spring assembly further includes: a spring movable seat; the spring movable seat is fixed to the secondary base plate, so that both ends of the spring are respectively fixed to the spring movable seat and the spring fixed seat; When the main shaft moves downward, the spring has a tendency to move in compression.

3. The spindle module according to claim 2, wherein: The spring fixed seat is provided with a through hole; the spring movable seat has a top seat and a connecting rod fixed to the bottom of the top seat; the connecting rod of the spring movable seat passes through the through hole of the spring fixed seat and is fixedly connected to the secondary base plate; the upper end of the spring abuts against the top seat of the spring movable seat, the lower end of the spring is fixed in the through hole of the spring fixed seat, and the connecting rod of the spring movable seat passes through the inner hole of the spring.

4. The spindle module according to claim 1, wherein: The spindle module also includes a piston assembly, which includes: a piston connecting plate and a pair of parallel pistons; the pistons are distributed on both sides of the suspension device, the piston connecting plate is simultaneously fixed to the same end of the two pistons, and the spindle connecting rod is fixed to the piston connecting plate; the piston connecting plate is also fixedly connected to the spindle.

5. The spindle module according to claim 4, wherein: The main shaft connecting rod includes: a rod body and a sphere arranged at the end of the rod body. A hemispherical groove is opened on the piston connecting plate, and the diameter of the hemispherical groove is larger than the diameter of the sphere; the ball head is installed in the hemispherical groove so that the main shaft connecting rod and the piston connecting plate form a universal joint structure.

6. The spindle module according to claim 4, wherein: The piston assembly further includes: a pressure plate; the pressure plate is fixed to the piston connecting plate; the rod body of the main shaft connecting rod passes through the pressure plate, and the main shaft connecting rod is fixedly connected to the pressure plate.

7. The spindle module according to claim 1, wherein: The suspension device comprises a suspension sleeve, a suspension through hole is provided in the suspension sleeve, and the main shaft is passed through the suspension through hole; and a plurality of radial micro holes are opened on the inner wall of the suspension through hole.

8. The spindle module according to claim 1, wherein: The spindle module also includes: an encoder; the encoder includes a reading head and a grating belt or a magnetic grating belt, the reading head is fixed on the front of the base plate and is located on the outside of the guide rail, the grating belt or the magnetic grating belt is fixedly connected to the secondary base plate and placed between the reading head and the guide rail.

9. The spindle module according to claim 4, wherein: The spindle module further includes: a chip suction cover; the chip suction cover is sleeved on the lower end of the spindle and fixed to the pistons on both sides.

10. A drilling machine tool, characterized in that: The drilling machine tool includes the spindle module according to any one of claims 1 to 9.

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