Switchable multi-spindle tool spindle head

Abstract

The utility model discloses a switchable spindle head of a multi-spindle device, which relates to the technical field of machining equipment and comprises a multi-spindle device and a power head component, the multi-spindle device comprises a shell, a transmission mechanism and a driven shaft; the power head assembly comprises a main shaft, a shaft sleeve, a main shaft box, a rotating switching mechanism and a main shaft rotating mechanism, the shaft sleeve is rotatably arranged in the main shaft box through the rotating switching mechanism, the end of the shaft sleeve is fixedly connected to the shell, the main shaft is rotatably arranged in the shaft sleeve through the main shaft rotating mechanism, and the rotating switching mechanism is fixedly connected to the end of the shaft sleeve. And the end part of the main shaft is connected to the input end of the transmission mechanism. The rotary switching mechanism can drive the multi-spindle tool to rotate by a certain angle, so that the tool position switching function is achieved, operation steps can be simplified, work efficiency can be improved, the spindle head of the multi-spindle tool can meet the special machining requirements of machining scenes such as faucets, and the multi-spindle tool has higher market competitiveness.

Description

Technical Field

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

[0002] A multi-axis spindle head refers to a mechanical device used to process a series of holes with different specifications, such as through holes, blind holes, threaded holes, etc. It has more than two tools that can process at the same time, so it can overcome the disadvantage of low processing efficiency of ordinary single-axis power heads.

[0003] For example, the technical solution disclosed in the Chinese patent with announcement number CN207402431U, the existing multi-axis spindle head usually includes two parts: a multi-axis and a power head assembly. The power head assembly provides a power source for the multi-axis, so that the various tools of the power head can rotate synchronously, thereby simultaneously processing different workpieces or different positions of the same workpiece.

[0004] In some special processing scenarios, such as faucet processing, at least three different tools are needed to perform rough drilling, fine drilling and tapping on the same position of the faucet workpiece. If a multi-axis spindle head is used as the processing equipment while the faucet workpiece is fixed in position, different tools need to be installed on different spindles of the multi-axis spindle head, and a tool switching function is required to ensure automatic completion of the rough drilling, fine drilling and tapping of the faucet workpiece.

[0005] However, the existing multi-axis spindle heads generally do not have the tool position switching function, and cannot automatically achieve the purpose of performing different processing on the same workpiece at the same position. Manual tool changing or changing the fixed position of the workpiece is required, which is not only cumbersome to operate but also inefficient, so improvement is urgently needed. Utility Model Content

[0006] The utility model provides a switchable multi-axis spindle head, the main purpose of which is to solve the problem that the existing multi-axis spindle head has no tool position switching function.

[0007] The utility model adopts the following technical solutions:

[0008] A switchable multi-spindle head, comprising a multi-spindle and a power head assembly. The multi-spindle includes a housing, a transmission mechanism, and driven shafts. A plurality of the driven shafts are rotatably arranged in the housing through the transmission mechanism in a synchronous manner. The power head assembly includes a main shaft, a sleeve, a main shaft box, a rotary switching mechanism, and a main shaft rotation mechanism. The sleeve is rotatably arranged in the main shaft box through the rotary switching mechanism, and the end of the sleeve is fixedly connected to the housing. 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.

[0009] Furthermore, the sleeve extends to the outside of the main shaft box and is provided with a motor box. The rotary switching mechanism includes a rotary switching motor and a connecting arm. The rotary switching motor is arranged beside the motor box, and the connecting arm is arranged in the motor box. One end of the connecting arm is connected to the output shaft of the rotary switching motor, and the other end of the connecting arm is connected to the sleeve.

[0010] Furthermore, the main shaft rotation mechanism includes a main shaft motor arranged beside the rotary switching motor and a transmission component arranged in the motor box. The connecting arm includes a first sleeve, a second sleeve, and a U-shaped crank arm. The first sleeve is sleeved outside the output shaft of the rotary switching motor, the second sleeve is sleeved outside the sleeve, and both ends of the U-shaped crank arm are respectively connected to the first sleeve and the second sleeve. And a clearance part for avoiding the transmission component is formed among the first sleeve, the U-shaped crank arm, and the second sleeve.

[0011] Furthermore, one side of the first sleeve is provided with a guide groove, the other side of the first sleeve is provided with a pair of mounting lugs, and an adjustment groove is arranged between the two mounting lugs.

[0012] Furthermore, the connecting arm further includes a connecting cylinder. The connecting cylinder is axially provided with a first mounting hole and a second mounting hole arranged inside and outside. The sleeve is arranged at the bottom of the connecting cylinder through a first bolt cooperating with the first mounting hole. The second sleeve is arranged at the top of the connecting cylinder through a second bolt cooperating with the second mounting hole.

[0013] Furthermore, a bearing for supporting the sleeve is arranged in the motor box, and the bearing is a crossed roller turntable bearing.

[0014] Furthermore, the power head assembly further includes a braking mechanism. The braking mechanism includes a brake pad and at least one brake caliper. The brake pad is fixedly arranged outside the sleeve, the brake caliper is fixedly arranged at the bottom of the motor box, and the brake caliper is provided with a clamping part for clamping the brake pad.

[0015] Furthermore, the transmission mechanism includes a driving gear and a plurality of driven gears, wherein the driving gear is arranged at the end of the main shaft, and the driven gear is arranged at the end of the driven shaft and meshes with the driving gear.

[0016] Furthermore, the power head assembly also includes a spindle feed mechanism, which includes a connecting seat, a screw pair and a spindle feed motor. The connecting seat is fixedly connected to the spindle box, and the spindle feed motor is arranged next to the rotation switching motor and is connected to the connecting seat through the screw pair.

[0017] 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.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] 1. 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 multi-axis device spindle head can be applied to the special processing needs of processing scenarios such as faucets, and has stronger market competitiveness.

[0020] 2. The utility model is equipped with a brake mechanism for the rotary switching mechanism, which can limit the rotation of the sleeve, thereby preventing the sleeve from deflecting during the processing, making the structure of the spindle head more stable and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a three-dimensional view of the first state of the utility model.

[0022] Figure 2 This is a three-dimensional view of the second state of the utility model.

[0023] Figure 3 It is a cross-sectional schematic diagram of the utility model.

[0024] Figure 4 It is a structural schematic diagram of the multi-axis device in the utility model.

[0025] Figure 5 It is a structural schematic diagram of the connecting arm in the utility model.

[0026] In the figure: 1 - multi - spindle head; 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

[0027] 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.

[0028] As Figures 1 to 3 shown, a switchable multi - spindle head main shaft includes a multi - spindle head 1 and a power head assembly. The multi - spindle head 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.

[0029] 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 head 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, so as to process 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 head 1 to slide axially, so that the multi - spindle head 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 head 1 to rotate, so that the multi - spindle head 1 has a cutting tool position switching function.

[0030] 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.

[0031] 1. Spindle rotation mechanism 5

[0032] 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.

[0033] 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.

[0034] 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.

[0035] 2. Spindle feed mechanism 6

[0036] 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.

[0037] 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 spindle head.

[0038] 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.

[0039] 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 spindle 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.

[0040] 3. Rotary switching mechanism 7

[0041] 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. 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 rotating motion 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 multiple spindle head 1 to rotate, thereby rotating the designated tool on the multiple spindle head 1 by a certain angle so as to align with the machining position of the workpiece.

[0042] 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. 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 main spindle head more stable and reliable. As a preferred solution, in this embodiment, two symmetrically arranged brake calipers 92 are provided at the bottom of the motor box 31 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.

[0043] 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. A clearance portion for avoiding the transmission assembly 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 main spindle head smaller, and has a higher installation flexibility.

[0044] 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 enabling the quick and accurate docking between the first sleeve 721 and the rotation switching motor 71.

[0045] 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, and 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.

[0046] 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.

[0047] like Figure 1 As shown, the spindle 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 feeding mechanism 6 to ensure that the tool is aligned with the processing position for precise processing; thus, different processing of the same processing position of the same faucet workpiece can be completed using one spindle head.

[0048] 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.

[0049] 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 switchable multi-spindle head for a multi-spindle drill, comprising a multi-spindle drill and a power head assembly, characterized in that: The multi-spindle drill includes a housing, a transmission mechanism and driven shafts. A plurality of the driven shafts are rotatably arranged in the housing through the transmission mechanism in synchronization; the power head assembly includes a main shaft, a bushing, a main shaft box, a rotary switching mechanism and a main shaft rotating mechanism. The bushing is rotatably arranged in the main shaft box through the rotary switching mechanism, and the end of the bushing is fixedly connected to the housing. The main shaft is rotatably arranged in the bushing through the main shaft rotating mechanism, and the end of the main shaft is connected to the input end of the transmission mechanism.

2. The switchable multi-spindle head for a multi-spindle drill according to claim 1, characterized in that: The bushing extends to the outside of the main shaft box and is provided with a motor box; the rotary switching mechanism includes a rotary switching motor and a connecting arm. The rotary switching motor is arranged beside the motor box, the connecting arm is arranged in the motor box, and one end of the connecting arm is connected to the output shaft of the rotary switching motor, and the other end of the connecting arm is connected to the bushing.

3. The switchable multi-spindle head for a multi-spindle drill according to claim 2, characterized in that: The main shaft rotating mechanism includes a main shaft motor arranged beside the rotary switching motor and a transmission component arranged in the motor box; the connecting arm includes a first sleeve, a second sleeve and a U-shaped crank arm. The first sleeve is sleeved outside the output shaft of the rotary switching motor, the second sleeve is sleeved outside the bushing, and both ends of the U-shaped crank arm are respectively connected to the first sleeve and the second sleeve, and a让位部 is formed between the first sleeve, the U-shaped crank arm and the second sleeve for avoiding the transmission component.

4. The switchable multi-spindle head for a multi-spindle drill according to claim 3, characterized in that: A guide groove is arranged on one side of the first sleeve, a pair of mounting lugs are arranged on the other side of the first sleeve, and an adjustment groove is arranged between the two mounting lugs.

5. The switchable multi-spindle head for a multi-spindle drill according to claim 3, characterized in that: The connecting arm further includes a connecting cylinder. The connecting cylinder is axially provided with a first mounting hole and a second mounting hole arranged inside and outside. The bushing is arranged at the bottom of the connecting cylinder through a first bolt cooperating with the first mounting hole; the second sleeve is arranged at the top of the connecting cylinder through a second bolt cooperating with the second mounting hole.

6. The switchable multi-spindle head for a multi-spindle drill according to claim 2, characterized in that: A bearing for supporting the bushing is arranged in the motor box, and the bearing is a crossed roller turntable bearing.

7. The switchable multi-spindle head for a multi-spindle drill according to claim 2, characterized in that: The power head assembly further includes a braking mechanism. The braking mechanism includes a brake pad and at least one brake caliper. The brake pad is fixedly arranged outside the bushing, the brake caliper is fixedly arranged at the bottom of the motor box, and the brake caliper is provided with a clamping portion for clamping the brake pad.

8. The switchable multi-spindle head for a multi-spindle drill according to claim 1, characterized in that: The transmission mechanism comprises a driving gear and a plurality of driven gears, wherein the driving gear is arranged at the end of the main shaft, and the driven gear is arranged at the end of the driven shaft and meshes with the driving gear.

9. A switchable multi-axis spindle head as claimed in claim 2, Features: The power head assembly also includes a spindle feeding mechanism, which includes a connecting seat, a screw pair and a spindle feeding motor. The connecting seat is fixedly connected to the spindle box, and the spindle feeding motor is arranged beside the rotary switching motor and is connected to the connecting seat through the screw pair.

10. A switchable multi-axis spindle head as claimed in claim 9, Features: 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.

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