Waterwheel type multi-shaft power head

Abstract

The utility model discloses a waterwheel type multi-shaft power head, and relates to the technical field of machining equipment, the waterwheel type multi-shaft power head comprises a multi-shaft device and a power head assembly, the multi-shaft device comprises a shell, a transmission mechanism and a plurality of driven shafts, and the plurality of driven shafts are synchronously and rotatably arranged in the shell through the transmission mechanism; the power head assembly comprises a main shaft, a shaft sleeve, a main shaft box, a main shaft rotating mechanism and a main shaft feeding mechanism, the main shaft is rotatably arranged in the shaft sleeve through the main shaft rotating mechanism, and the end of the main shaft is connected to the input end of the transmission mechanism; the shaft sleeve is arranged in the spindle box in an axial sliding mode through the spindle feeding mechanism, and the end of the shaft sleeve is fixedly connected to the shell. The multi-shaft device and the waterwheel type power head assembly are combined with each other, so that the power head not only has a rotary driving function, but also has an axial feeding function, is compact in overall structure, small in occupied space and high in installation flexibility, and effectively overcomes the defects in the prior art.

Description

Technical Field

[0001] The utility model relates to the technical field of machining equipment, in particular to a waterwheel type multi-axis power head. Background Art

[0002] The emergence of multi-axis power heads makes up for the disadvantage of low processing efficiency of traditional single-axis power heads. The existing concepts of multi-axis power heads usually include three solutions: power turret, multi-axis device and integrated multi-axis spindle head. The specific differences between these three solutions are as follows:

[0003] (1) A powered tool turret is a rotating tool disc with two or more tools. The tool disc can be driven to rotate by an additional drive component, thereby switching between different tools and controlling the specified tool to process the workpiece;

[0004] (2) A multi-axis machine refers to a machine with two or more tools that can be processed simultaneously on one housing. The additional drive components can control multiple tools to work synchronously, so that the same processing can be performed on different workpieces or on different positions of the same workpiece;

[0005] (3) An integrated multi-axis spindle head is one that integrates a drive assembly, a transmission assembly, and multiple tools in the same housing. The built-in drive assembly drives multiple tools to work synchronously, thereby performing the same processing on different workpieces or on different positions of the same workpiece.

[0006] Compared with the powered turret and integrated multi-axis spindle head, the multi-axis device has the advantages of simple structure, flexible installation, small space and low cost. It can adapt to the processing needs of different scenarios and therefore has stronger market competitiveness.

[0007] The Chinese patent with the announcement number CN102672742A discloses a transmission mechanism for fixing the head of a car brake pad drilling machine. The patent connects the multi-axis device to the output shaft of the motor through the mounting base, and installs the mounting base on the slide, so that the whole device has an axial feeding function. Although the patent can use the multi-axis device to realize multi-axis matching processing and complete the drilling and countersinking forming process required for the car brake pad, the overall structure is relatively complex, and there are still problems such as low flexibility and large space occupation, which cannot give full play to the advantages of the multi-axis device.

[0008] In addition, the multi-axis device in this patent does not have a tool switching function, so it cannot automatically achieve the purpose of performing different processing on the same workpiece at the same position like a power turret. Manual tool changing or changing the fixed position of the workpiece is required, which is not only cumbersome to operate, but also inefficient, and therefore urgently needs to be improved. Utility Model Content

[0009] The utility model provides a waterwheel type multi-axis power head, the main purpose of which is to solve the problems existing in the prior art.

[0010] The utility model adopts the following technical solutions:

[0011] A waterwheel-type multi-axis power head comprises a multi-axis device and a power head assembly, wherein the multi-axis device comprises a housing, a transmission mechanism and driven shafts, and a plurality of the driven shafts are synchronously rotatably arranged in the housing through the transmission mechanism; the power head assembly comprises a main shaft, a sleeve, a main shaft box, a main shaft rotation mechanism and a main shaft feeding mechanism, wherein the main shaft is rotatably arranged in the sleeve through the main shaft rotation mechanism, and the end of the main shaft is connected to the input end of the transmission mechanism; the sleeve is axially slidably arranged in the main shaft box through the spindle feeding mechanism, and the end of the sleeve is fixedly connected to the housing.

[0012] Furthermore, the shaft sleeve extends to the outside of the spindle box and is provided with a motor box; the spindle feed mechanism includes a connecting seat, a screw pair and a spindle feed motor, the connecting seat is fixedly connected to the spindle box, the screw pair includes a screw and a screw nut that cooperate with each other, the screw is rotatably arranged in the motor box through the spindle feed motor, and the screw nut is fixedly connected to the connecting seat.

[0013] Furthermore, the power head assembly also includes a guide mechanism, which includes a guide rod and a sliding sleeve, one end of the guide rod is fixed to the motor box, and the other end of the guide rod is slidably connected to the connecting seat through the sliding sleeve.

[0014] Furthermore, a mounting portion for mounting the spindle box is provided in the middle of the connecting seat, and a first through hole for mounting the screw nut and a second through hole for mounting the sliding sleeve are respectively provided on both sides of the connecting seat.

[0015] Furthermore, a bearing seat is provided in the motor box, and the screw rod is rotatably arranged in the bearing seat.

[0016] Furthermore, a first step surface is provided on the outer side of the spindle box, and a second step surface matched with the first step surface is provided on the inner side of the connecting seat.

[0017] Furthermore, the spindle rotation mechanism includes a spindle motor and a transmission assembly disposed in the motor box, and the spindle is connected to the spindle motor via the transmission assembly.

[0018] Furthermore, it also includes a rotation switching mechanism, and the sleeve is rotatably arranged in the spindle box through the rotation switching mechanism.

[0019] Furthermore, the rotation switching mechanism includes a rotation switching motor and a connecting arm, wherein the connecting arm is arranged in the motor box, and one end of the connecting arm is connected to the rotation switching motor, and the other end of the connecting arm is connected to the shaft sleeve.

[0020] Furthermore, the power head assembly also includes a brake mechanism, which includes a brake pad and at least one brake caliper, the brake pad is fixed to the outside of the sleeve, the brake caliper is fixed to the motor box, and the brake caliper is provided with a clamping portion for clamping the brake pad.

[0021] Compared with the prior art, the beneficial effects of the present invention are:

[0022] 1. The utility model combines the multi-axis device with the waterwheel-type power head assembly, so that the power head has both a rotation drive function and an axial feed function. The overall structure is compact, the space occupied is small, and the installation flexibility is high, which effectively solves the defects of the prior art.

[0023] 2. The rotary switching mechanism in the utility model can drive the multi-axis device to rotate a certain angle, thereby realizing the tool position switching function, which is conducive to simplifying the operation steps and improving work efficiency, so that the power head can be applied to the special processing needs of processing scenarios such as faucets, and has stronger market competitiveness. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a three-dimensional view of the first state of the utility model.

[0025] Figure 2 This is a three-dimensional view of the second state of the utility model.

[0026] Figure 3 It is a cross-sectional schematic diagram of the utility model.

[0027] Figure 4 It is a structural schematic diagram of the multi-axis device in the utility model.

[0028] Figure 5 It is a structural schematic diagram of the connecting arm in the utility model.

[0029] In the figure: 1 - multi - spindle device; 11 - housing; 111 - box body; 112 - cover body; 12 - driven shaft; 13 - driving gear; 14 - driven gear; 2 - main shaft; 3 - shaft sleeve; 31 - motor box; 311 - bearing seat; 312 - bearing; 4 - main shaft box; 41 - first step surface; 5 - main shaft rotation mechanism; 51 - main shaft motor; 52 - motor synchronous pulley; 53 - main shaft synchronous pulley; 54 - synchronous belt; 6 - main shaft feeding mechanism; 61 - connecting seat; 611 - second step surface; 62 - main shaft feeding motor; 63 - lead screw; 64 - lead screw nut; 65 - mounting seat; 7 - rotation switching mechanism; 71 - rotation switching motor; 72 - connecting arm; 721 - first sleeve; 7211 - guiding groove; 7212 - mounting lug; 7213 - adjusting groove; 722 - second sleeve; 723 - C - shaped crank arm; 724 - connecting cylinder; 7241 - first mounting hole; 7242 - second mounting hole; 8 - guiding mechanism; 81 - guiding rod; 82 - sliding sleeve; 9 - braking mechanism; 91 - brake pad; 92 - brake caliper. Detailed implementation manners

[0030] The following describes the detailed implementation manners of the present utility model with reference to the accompanying drawings. To fully understand the present utility model, many details are described below. However, for those skilled in the art, the present utility model can be implemented without these details.

[0031] As Figures 1 to 3 shown, a waterwheel - type multi - spindle power head includes a multi - spindle device 1 and a power head assembly. The multi - spindle device 1 includes a housing 11, a transmission mechanism, and a driven shaft 12. A plurality of driven shafts 12 are rotatably arranged in the housing 11 synchronously through the transmission mechanism. The power head assembly includes a main shaft 2, a shaft sleeve 3, a main shaft box 4, a main shaft rotation mechanism 5, a main shaft feeding mechanism 6, and a rotation switching mechanism 7. The main shaft 2 is rotatably arranged in the shaft sleeve 3 through the main shaft rotation mechanism 5, and the end of the main shaft 2 is connected to the input end of the transmission mechanism. The shaft sleeve 3 is axially slidable and rotatably arranged in the main shaft box 4 through the main shaft feeding mechanism 6 and the rotation switching mechanism 7, and the end of the shaft sleeve 3 is fixedly connected to the housing 11.

[0032] As Figures 1 to 3 shown, the main shaft box 4 is fixedly installed on the machine tool, and a plurality of cutting tools (not shown in the figure) are respectively installed on the driven shafts 12 of the multi - spindle device 1. During operation, the main shaft rotation mechanism 5 drives the main shaft 2 to rotate, thereby driving the cutting tools on the driven shafts 12 to rotate synchronously through the transmission mechanism, and thus machining the workpiece. The main shaft feeding mechanism 6 drives the shaft sleeve 3 to slide axially, thereby driving the main shaft 2 and the multi - spindle device 1 to slide axially, so that the multi - spindle device 1 has an axial feeding function. The main shaft rotation mechanism 5 drives the shaft sleeve 3 to rotate, thereby driving the main shaft 2 and the multi - spindle device 1 to rotate, so that the multi - spindle device 1 has a cutting tool position switching function.

[0033] In order to more clearly illustrate the design concept of the present invention, the specific structures and working principles of the spindle rotating mechanism 5, the spindle feeding mechanism 6 and the rotation switching mechanism 7 are analyzed in detail below.

[0034] 1. Spindle rotation mechanism 5

[0035] like Figures 1 to 3 As shown, the spindle rotation mechanism 5 includes a spindle motor 51 and a transmission assembly, and the transmission assembly includes a motor synchronous wheel 52, a spindle synchronous wheel 52 and a synchronous belt 54. The sleeve 3 extends to the outside of the spindle box 4 and is provided with a motor box 31; the spindle motor 51 is arranged beside the motor box 31, and the output end of the spindle motor 51 extends into the motor box 31 and is provided with a motor synchronous wheel 52, the spindle 2 extends into the motor box 31 and is provided with a spindle synchronous wheel 52, and the synchronous belt 54 is transmission-connected to the motor synchronous wheel 52 and the spindle synchronous wheel 52, thereby realizing the transmission connection between the spindle motor 51 and the spindle 2.

[0036] like Figure 3 and Figure 4 As shown, the transmission mechanism of the multi-axis device 1 includes a driving gear 13 and a plurality of driven gears 14. The driving gear 13 is arranged at the end of the main shaft 2, and the driven gear 14 is arranged at the end of the driven shaft 12 and meshes with the driving gear 13. When the main shaft motor 51 is working, the main shaft 2 starts to rotate, and the driving gear 13 drives the plurality of driven gears 14 to rotate, thereby driving the driven shaft 12 to rotate, and then the tool installed on the driven shaft 12 starts to rotate, and finally multiple tools work synchronously.

[0037] like Figures 1 to 4 As shown, the housing 11 includes a detachably connected box body 111 and a cover body 112, the transmission mechanism and the driven shaft 12 are installed in the box body 111, and the end of the main shaft 2 passes through the cover body 112 and is connected to the driving gear 13. As a preferred solution, the multi-axis device 1 of this embodiment is provided with three driven shafts 12, and three different tools are respectively installed on the three driven shafts 12, so the multi-axis device 1 has three different processing functions.

[0038] 2. Spindle feed mechanism 6

[0039] like Figures 1 to 3As shown, the spindle feeding mechanism 6 includes a connecting seat 61, a screw pair and a spindle feeding motor 62. The connecting seat 61 is fixedly connected to the spindle box 4, and the spindle feeding motor 62 is arranged beside the motor box 31. The screw pair includes a screw 63 and a screw nut 64 that cooperate with each other. The screw 63 is rotatably arranged on the motor box 31 through the spindle feeding motor 62, and the screw nut 64 is fixedly connected to the connecting seat 61. When the spindle feeding motor 62 is working, the screw 63 rotates synchronously with the output shaft of the spindle feeding motor 62. Since the screw nut 64 is fixedly connected to the connecting seat 61, and the connecting seat 61 is fixedly connected to the spindle box 4, the screw 63 will rotate in the screw nut 64, thereby driving the motor box 31 and the spindle feeding motor 62 to slide axially together; and since the two ends of the shaft sleeve 3 are respectively connected to the motor box 31 and the housing 11 of the multi-axis device 1, it can play the role of transmission connection, driving the multi-axis device 1 to achieve axial feeding.

[0040] like Figures 1 to 3 As shown, the power head assembly also includes a guide mechanism 8, which includes a guide rod 81 and a sliding sleeve 82. One end of the guide rod 81 is fixed to the motor box 31, and the other end of the guide rod 81 is slidably connected to the connecting seat 61 through the sliding sleeve 82. The guide mechanism 8 can play a supporting and guiding role, and can ensure that the motor box 31 and each motor slides smoothly and stably along the axial direction, so as to accurately control the multi-axis device 1 to achieve axial feeding, and effectively improve the rigidity, accuracy and reliability of the power head.

[0041] like Figures 1 to 3 As shown, specifically, a bearing seat 311 is provided in the motor box 31, and the screw rod 63 is rotatably provided in the bearing seat 311. A mounting seat 65 is also provided between the spindle feed motor 62 and the motor box 31, and the screw rod 63 extends into the mounting seat 65 and is connected to the output shaft of the spindle feed motor 62 through a coupling (not shown in the figure). The mounting seat 65 can protect the coupling, so that the connection between the screw rod 63 and the spindle feed motor 62 is more firm and reliable.

[0042] like Figures 1 to 3 As shown, specifically, a mounting portion for mounting the spindle box 4 is provided in the middle of the connecting seat 61, and a first through hole for mounting the screw nut 64 and a second through hole for mounting the sliding sleeve 82 are respectively provided on both sides of the connecting seat 61. Such a design makes the spindle feeding mechanism 6 and the guide mechanism 8 evenly distributed on both sides of the spindle box 4, thereby making the structure of the power head more compact and reasonable, and stable and reliable. In order to make the matching between the spindle box 4 and the connecting seat 61 more tightly and firmly, the present embodiment provides a first step surface 41 on the outer side of the spindle box 4, and provides a second step surface 611 adapted to the first step surface 41 on the inner side of the connecting seat 61.

[0043] 3. Rotary switching mechanism 7

[0044] As Figure 1 shown, the rotation switching mechanism 7 includes a rotation switching motor 71 and a connecting arm 72. The rotation switching motor 71 is arranged between the main shaft motor 51 and the main shaft feed motor 62. The connecting arm 72 is arranged in the motor box 31, and one end of the connecting arm 72 is connected to the output shaft of the rotation switching motor 71, and the other end of the connecting arm 72 is connected to the bushing 3. During operation, the connecting arm 72 makes a rotational movement driven by the rotation switching motor 71, thereby driving the bushing 3 to rotate. While the bushing 3 rotates, it drives the main shaft 2 and the multi-spindle head 1 to rotate, thereby rotating the designated tool on the multi-spindle head 1 by a certain angle so as to align with the machining position of the workpiece.

[0045] As Figure 1 and Figure 2 shown, the power head assembly further includes a braking mechanism 9. The braking mechanism 9 includes a brake pad 91 and at least one brake caliper 92. The brake pad 91 is fixedly arranged outside the bushing 3, and the brake caliper 92 is fixedly arranged at the bottom of the motor box 31, and the brake caliper 92 is provided with a clamping portion for clamping the brake pad 91. After the tool position is switched, in order to prevent the bushing 3 from deflecting during the machining process, the brake pad 91 can be clamped by the brake caliper 92, thereby achieving the effect of restricting the rotation of the bushing 3 and making the structure of the power head more stable and reliable. As a preferred solution, two symmetrically arranged brake calipers 92 are provided at the bottom of the motor box 31 in this embodiment, so as to ensure that the brake pad 91 can be firmly clamped. The control principle of the brake caliper 92 belongs to the prior art and will not be elaborated here.

[0046] As Figure 3 and Figure 5 shown, the connecting arm 72 includes a first sleeve 721, a second sleeve 722 and a U-shaped crank arm 723. The first sleeve 721 is sleeved outside the output shaft of the rotation switching motor 71, the second sleeve 722 is sleeved outside the bushing 3, and the two ends of the U-shaped crank arm 723 are respectively connected to the first sleeve 721 and the second sleeve 722, and a让位部 (letting-through portion) for avoiding the transmission component is formed between the first sleeve 721, the U-shaped crank arm 723 and the second sleeve 722. Such a design makes the layout in the motor box 31 more compact and reasonable, greatly reduces the volume of the motor box 31, makes the overall occupied space of the power head smaller, and has a higher installation flexibility.

[0047] As Figure 3 and Figure 5 shown, specifically, a guide groove 7211 is provided on one side of the first sleeve 721, a pair of mounting lugs 7212 are provided on the other side of the first sleeve 721, and an adjustment groove 7213 is provided between the two mounting lugs 7212, thereby realizing the quick and accurate docking between the first sleeve 721 and the rotation switching motor 71.

[0048] As Figure 3 and Figure 5 As shown, the connecting arm 72 also includes a connecting tube 724, and the connecting tube 724 is provided with a first mounting hole 7241 and a second mounting hole 7242 arranged inside and outside along its axial direction. The shaft sleeve 3 is arranged at the bottom of the connecting tube 724 by a first bolt (not shown in the figure) in conjunction with the first mounting hole 7241; the second sleeve 722 is arranged at the top of the connecting tube 724 by a second bolt (not shown in the figure) in conjunction with the second mounting hole 7242. Such a design can reduce the difficulty of installing the shaft sleeve 3 and the connecting arm 72, and make the connection between the two more firm and reliable.

[0049] like Figure 1 As shown, a bearing 312 for supporting the shaft sleeve 3 is provided in the motor box 31, thereby ensuring that the shaft sleeve 3 can rotate smoothly in the motor box 31. In this embodiment, the bearing 312 is preferably a cross roller turntable bearing 312, which has the advantages of compact structure, light weight, high manufacturing precision, small assembly clearance, etc., and can withstand axial force overturning moment and large radial force at the same time.

[0050] like Figure 1 As shown, the power head provided in this embodiment can be applied to the processing scenario of performing different processing on the same workpiece at the same position in sequence. Taking the processing scenario of a faucet as an example, the faucet workpiece is fixed at a specified position of the machine tool, and three different tools are installed on the three driven shafts 12 of the multi-axis device 1 respectively; first, the first tool is aligned with the processing position of the faucet workpiece, and the first tool is driven by the spindle rotation mechanism 5 to perform rough processing and drilling on the faucet workpiece; then, the multi-axis device 1 is driven to rotate by the shaft switching mechanism, so that the second tool is aligned with the processing position of the faucet workpiece, and the second tool is driven by the spindle rotation mechanism 5 to perform fine processing and drilling on the faucet workpiece; finally, the multi-axis device 1 is driven to rotate by the shaft switching mechanism, so that the third tool is aligned with the processing position of the faucet workpiece, and the third tool is driven by the spindle rotation mechanism 5 to perform tapping on the faucet workpiece; during the processing, the axial feed amount of the multi-axis device 1 is adjusted in real time by the spindle feed mechanism 6 to ensure that the tool is aligned with the processing position for precise processing; thus, different processing on the same processing position of the same faucet workpiece can be completed by using one power head.

[0051] In the faucet workpiece processing process illustrated in this example, although the three tools rotate synchronously, only the tool facing the processing position is in working state, and the other two tools are in no-load operation state. However, this does not mean that the specific implementation of this embodiment is limited to this. In other embodiments, the size and power of the multi-axis device 1 can be reasonably set so that the three tools can perform different processing on different positions of the same workpiece, or the three tools can perform different processing on the same position of different workpieces, thereby improving work efficiency.

[0052] The above is only a specific implementation method of the utility model, but the design concept of the utility model is not limited to this. Any non-substantial changes to the utility model using this concept shall be deemed as an infringement of the protection scope of the utility model.

Claims

1. A waterwheel type multi-axis power head, comprising a multi-axis device and a power head assembly, characterized in that: The multi-axis device includes a shell, a transmission mechanism and a driven shaft, and a plurality of the driven shafts are synchronously rotatably arranged in the shell through the transmission mechanism; the power head assembly includes a spindle, a sleeve, a spindle box, a spindle rotation mechanism and a spindle feeding mechanism, and the spindle is rotatably arranged in the sleeve through the spindle rotation mechanism, and the end of the spindle is connected to the input end of the transmission mechanism; the sleeve is axially slidably arranged in the spindle box through the spindle feeding mechanism, and the end of the sleeve is fixedly connected to the shell.

2. A waterwheel type multi-axis power head according to claim 1, characterized in that: The sleeve extends to the outside of the spindle box and is provided with a motor box; the spindle feed mechanism includes a connecting seat, a screw pair and a spindle feed motor, the connecting seat is fixedly connected to the spindle box, the screw pair includes a screw and a screw nut that cooperate with each other, the screw is rotatably arranged in the motor box through the spindle feed motor, and the screw nut is fixedly connected to the connecting seat.

3. A waterwheel type multi-axis power head as claimed in claim 2, characterized in that: The power head assembly also includes a guide mechanism, which includes a guide rod and a sliding sleeve. One end of the guide rod is fixed to the motor box, and the other end of the guide rod is slidably connected to the connecting seat through the sliding sleeve.

4. A waterwheel type multi-axis power head as claimed in claim 3, characterized in that: A mounting portion for mounting the spindle box is provided in the middle of the connecting seat, and a first through hole for mounting the screw nut and a second through hole for mounting the sliding sleeve are respectively provided on both sides of the connecting seat.

5. A waterwheel type multi-axis power head as claimed in claim 2, characterized in that: A bearing seat is arranged in the motor box, and the screw rod is rotatably arranged in the bearing seat.

6. A waterwheel type multi-axis power head as claimed in claim 2, characterized in that: The outer side of the spindle box is provided with a first step surface, and the inner side of the connecting seat is provided with a second step surface matched with the first step surface.

7. A waterwheel type multi-axis power head as claimed in claim 2, characterized in that: The spindle rotating mechanism comprises a spindle motor and a transmission assembly arranged in the motor box, and the spindle is connected to the spindle motor through the transmission assembly.

8. A waterwheel type multi-axis power head as claimed in claim 2, characterized in that: It also includes a rotation switching mechanism, and the sleeve is rotatably arranged in the spindle box through the rotation switching mechanism.

9. A waterwheel type multi-axis power head as claimed in claim 8, characterized in that: The rotation switching mechanism comprises a rotation switching motor and a connecting arm, wherein the connecting arm is arranged in the motor box, one end of the connecting arm is connected to the rotation switching motor, and the other end of the connecting arm is connected to the shaft sleeve.

10. A waterwheel type multi-axis power head as claimed in claim 8, characterized in that: The power head assembly also includes a brake mechanism, which includes a brake pad and at least one brake caliper. The brake pad is fixed to the outside of the sleeve, and the brake caliper is fixed to the motor box. The brake caliper is provided with a clamping portion for clamping the brake pad.

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