Friction stir welding main shaft dip angle adjusting and locking mechanism

Abstract

The utility model relates to the technical field of friction stir welding, in particular to a friction stir welding spindle inclination angle adjusting and locking mechanism. The device comprises a shaft sleeve and a main shaft which is coaxially and rotatably matched in an inner cavity of the shaft sleeve, a radial rotating shaft is fixed on the side wall of the shaft sleeve and rotatably matched on a rotating seat of an adjusting sleeve around the axis of the radial rotating shaft, and the outer end of the radial rotating shaft is of a conical structure which is wide inside and narrow outside. And the second sliding holding piece and the radial rotating shaft can form tapered wedge abutting locking. According to the device, the adjusted main shaft can be locked conveniently and stably, the welding precision of friction stir welding is guaranteed, and damage to the main shaft is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of friction stir welding, in particular to a friction stir welding spindle inclination angle adjusting and locking mechanism. Background Technique

[0002] Friction stir welding refers to the process of locally plastically softening the welded material by the heat generated by the friction between a high-speed rotating welding tool and the workpiece. When the welding tool moves forward along the welding interface, the plastified material flows from the front of the welding tool to the back under the action of the rotational friction force of the welding tool, and a dense solid-phase weld seam is formed under the extrusion of the welding tool.

[0003] In the existing friction stir welding, during the welding process, according to the material and welding thickness of the base material, the welding process needs to be adjusted. When adjusting the welding process, it is often necessary to adjust the inclination angle of the spindle of the friction stir welding equipment. As recorded in the text of a friction stir welding spindle inclination angle adjusting device with the Chinese patent publication number CN116352247A, its inclination angle adjusting component adopts the adjusting method of the meshing of a worm gear and a worm, and drives the spindle to perform horizontal adjustment around its own radial axis; in addition, a translation mechanism and an adjusting mechanism are also provided to lock the adjusted worm. In actual implementation, due to the characteristics of rigid transmission structures such as gear transmission or worm gear and worm transmission structures, side gaps are often set at their meshing positions to store lubricating oil, compensate for the elastic deformation, thermal expansion after the gear transmission is stressed, as well as the manufacturing errors and assembly errors of other components of the gear transmission device, and avoid problems such as jamming or burning of the gears during the transmission process. Obviously, the method of locking the worm as described in the cited patent is not only cumbersome to lock after adjustment, but also due to the existence of side gaps at the meshing position of the worm gear and the worm, even if the worm is locked, the worm gear will still swing within a small range, which in turn causes a small swing of the friction stir welding spindle, not only affecting the welding accuracy, but also causing certain stress damage to the spindle. Therefore, it is urgent to solve. Content of the Utility Model

[0004] In order to avoid and overcome the technical problems existing in the prior art, the utility model provides a friction stir welding spindle inclination angle adjusting and locking mechanism, which is convenient and stable to lock the adjusted spindle, not only ensures the welding accuracy of friction stir welding, but also reduces the damage to the spindle.

[0005] To achieve the above object, the utility model provides the following technical solutions:

[0006] A friction stir welding spindle inclination angle adjusting and locking mechanism includes a bushing and a spindle rotatably and coaxially fitted in the inner cavity of the bushing. A radial rotating shaft is fixed on the side wall of the bushing. The radial rotating shaft is rotatably fitted on the rotating seat of an adjusting sleeve around its own axis. The outer end of the radial rotating shaft has a tapered structure that is wider inside and narrower outside. A second sliding clamping member is installed on the rotating seat and can reciprocally slide axially along the radial rotating shaft and can form an inclined wedge abutment and locking with the radial rotating shaft.

[0007] As a further scheme of the present utility model: The second sliding clamping member includes a second clamping hoop coaxially arranged with the radial rotating shaft. The inner cavity of the second clamping hoop has a tapered structure adapted to the outer peripheral contour of the outer end of the radial rotating shaft.

[0008] As a further scheme of the present utility model: A second clamping ring is sleeved on the outer end of the radial rotating shaft. The second clamping ring is set to have a tapered ring structure adapted to the outer end of the radial rotating shaft, and a second contraction gap with its length direction distributed along the hypotenuse of the second clamping ring is provided at the narrow opening of the second clamping ring.

[0009] As a further scheme of the present utility model: The second contraction gaps are set to be at least two circumferentially uniformly distributed around the second clamping ring.

[0010] As a further scheme of the present utility model: A second oil sleeve is fixed on the outside of the rotating seat. A second piston cavity coaxially arranged with the radial rotating shaft is formed inside the second oil sleeve. The second sliding clamping member further includes a piston block sliding in the second piston cavity. The second clamping hoop is fixed to the piston block, and the second clamping hoop axially penetrates the second oil sleeve and forms a sliding sealing fit with the second oil sleeve. The forward stroke cavity and the return stroke cavity in the second piston cavity are respectively connected to an external oil tank through a second unlocking oil hole and a second braking oil hole.

[0011] As a further scheme of the present utility model: It further includes an inclination angle adjusting drive assembly for driving the bushing to rotate around the radial rotating shaft.

[0012] As a further scheme of the present utility model: Taking the rotating seat and the radial rotating shaft as a rotating unit, two such rotating units are symmetrically distributed on both sides of the bushing. The radial rotating shaft of one rotating unit cooperates with the second sliding clamping member, and the radial rotating shaft of the other rotating unit cooperates with the power end of the inclination angle adjusting drive assembly.

[0013] Compared with the prior art, the beneficial effects of the present utility model are:

[0014] 1. The second sliding clamping member is used to lock the sleeved shaft after rotational adjustment by wedging and tightly pressing against the radial rotating shaft on the sleeve. Compared with the traditional locking methods such as locking by worm gears or gear meshing, the locking method of this application is not only convenient and fast, but also the sleeved shaft after locking will not reciprocate within a small range, with high locking stability, thus ensuring the accuracy of friction stir welding and reducing the damage to the main shaft.

[0015] 2. The second sliding clamping member includes a second clamping hoop arranged coaxially with the radial rotating shaft. The inner cavity of the second clamping hoop has a conical structure adapted to the outer peripheral contour of the outer end of the radial rotating shaft, realizing a wrapped and uniform pressing against the outer periphery of the radial rotating shaft and ensuring the locking effect of rotating and locking the radial rotating shaft.

[0016] 3. A second clamping ring is sleeved on the outer end of the radial rotating shaft. The second clamping ring is set as a conical ring structure adapted to the outer end of the radial rotating shaft, and a second shrinkage gap with a length direction distributed along the hypotenuse of the second clamping ring is arranged at the narrow opening of the second clamping ring. By using the method of shrinking and clamping the second clamping ring, the locking of the radial rotating shaft is made more stable. Preferably, the second shrinkage gaps are set as at least two circumferentially and evenly distributed around the second clamping ring, ensuring the uniformity of the locking force distribution on the outer periphery of the radial rotating shaft.

[0017] 4. The driving of the second sliding clamping member is realized in the form of the movement of a hydraulic piston, with stable driving and good locking effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic connection structure diagram of the main shaft and the adjusting sleeve in the present utility model.

[0019] Figure 2 It is a schematic first overall assembly structure diagram of the present utility model.

[0020] Figure 3 It is a schematic distribution structure diagram of the main shaft, the adjusting sleeve and the power unit in the present utility model.

[0021] Figure 4 It is a schematic second overall assembly structure diagram of the present utility model.

[0022] Figure 5 It is Figure 4 a partial enlarged structure diagram at A of

[0023] Figure 6 It is a schematic connection structure diagram of the lifting cylinder and the sliding column in the present utility model.

[0024] In the figure: 10, box body; 20, main shaft motor; 21, universal coupling; 30, main shaft; 31, shaft sleeve; 311, radial rotating shaft; 40, adjusting sleeve; 41, slewing base; 42, first driven gear; 50, inclination adjusting drive assembly; 51, second driven gear; 52, driven bevel gear; 53, adjusting bevel gear; 54, driving wheel; 55, adjusting wheel; 56, synchronous belt; 57, shaft seat; 58, rotary encoder; 60, switching assembly; 61, lifting cylinder; 611, inserting plate; 62, sliding column; 621, bracket; 622, connecting ring; 70, power unit; 71, adjusting motor; 72, spline sleeve; 721, first driving gear; 722, second driving gear; 80, first braking assembly; 81, first oil sleeve; 811, first unlocking oil hole; 812, first braking oil hole; 813, first piston cavity; 82, first sliding clamping member; 821, piston ring; 822, first clamping hoop; 83, first clamping ring; 90, second braking assembly; 91, second oil sleeve; 911, second unlocking oil hole; 912, second braking oil hole; 913, second piston cavity; 92, second sliding clamping member; 921, piston block; 922, second clamping hoop; 93, second clamping ring; 931, second shrinking gap. Detailed implementation mode

[0025] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0026] For the convenience of understanding, the specific structure and working mode of the present invention are further described below with reference to the accompanying drawings:

[0027] The specific structure of the present invention is referred to Figures 1-6 As shown, its main structure includes a main shaft mechanism with an adjustable inclination angle in the horizontal view, and a second braking assembly 90 for braking and locking after the inclination angle of the main shaft mechanism is adjusted.

[0028] Specifically, as Figure 1As shown in the figure, the main shaft mechanism includes a bushing 31 and a main shaft 30 that is coaxially rotatably fitted in the inner cavity of the bushing 31. A radial rotating shaft 311 is fixed to the side wall of the bushing 31, and the radial rotating shaft 311 is rotatably fitted on a rotating seat 41 of an adjusting sleeve 40 around its own axis. The outer end of the radial rotating shaft 311 has a tapered structure that is wider on the inside and narrower on the outside; the second braking assembly 90 includes a second sliding clamping member 92 that is installed on the rotating seat 41 and can reciprocate axially along the radial rotating shaft 311 and can form an inclined wedge abutment and locking with the radial rotating shaft 311. By driving the second sliding clamping member 92 to wedge-connect with the radial rotating shaft 311 by a power source, the rotation of the radial rotating shaft 311 is locked, and then the main shaft 30 after the inclination adjustment is locked. This locking method is not only convenient and fast, but also the main shaft will not reciprocate within a small range after locking, has high locking stability, thus ensuring the accuracy of friction stir welding, and also reducing the damage to the main shaft.

[0029] Furthermore, as Figure 1 shown, the second sliding clamping member 92 includes a second clamping hoop 922 arranged coaxially with the radial rotating shaft 311. The inner cavity of the second clamping hoop 922 has a tapered structure adapted to the outer peripheral contour of the outer end of the radial rotating shaft 311, realizing a wrapped and uniform abutment on the outer periphery of the radial rotating shaft 311, ensuring the effect of rotating and locking the radial rotating shaft 311.

[0030] Even further, as Figure 1 shown, a second clamping ring 93 is sleeved on the outer end of the radial rotating shaft 311. The second clamping ring 93 is set as a tapered ring structure adapted to the outer end of the radial rotating shaft 311, and a second contraction gap 931 with a length direction distributed along the hypotenuse of the second clamping ring 93 is provided at the narrow end of the second clamping ring 93. By using the method of the second clamping ring 93 contracting and clamping, the locking of the radial rotating shaft 311 is made more stable. Preferably, the second contraction gaps 931 are set to at least two that are circumferentially evenly distributed around the second clamping ring 93, ensuring the uniformity of the locking force distribution on the outer periphery of the radial rotating shaft 311.

[0031] On the above basis, as Figure 1As shown in the figure, the power drive of the second sliding clamping member 92 can adopt an oil cylinder piston structure. Specifically, a second oil sleeve 91 is fixed on the outer side of the rotary base 41, and a second piston cavity 913 coaxial with the radial rotating shaft 311 is formed inside the second oil sleeve 91; the second sliding clamping member 92 further includes a piston block 921 sliding in the second piston cavity 913, the second clamping hoop 922 is fixed to the piston block 921, and the second clamping hoop 922 axially penetrates the second oil sleeve 91 and forms a sliding seal with the second oil sleeve 91. The forward chamber and the return chamber in the second piston cavity 913 are respectively connected to an external oil tank through a second unlocking oil hole 911 and a second braking oil hole 912. During use, hydraulic oil is input into the second braking oil hole 912 through an oil pump, so as to push the piston block 921 and the second clamping hoop 922 to slide towards the radial rotating shaft 311, thereby realizing the locking of the radial rotating shaft 311; hydraulic oil is input into the second unlocking oil hole 911 through an oil pump, and the piston block 921 and the second clamping hoop 922 are pushed to move away from the radial rotating shaft 311, realizing the rotational unlocking of the radial rotating shaft 311.

[0032] In addition, as Figure 1 shown, taking the rotary base 41 and the radial rotating shaft 311 as a rotary unit, two such rotary units are symmetrically distributed on both sides of the shaft sleeve 31. The radial rotating shaft 311 of one rotary unit is matched with the second sliding clamping member 92, and the radial rotating shaft 311 of the other rotary unit is matched with the power end of the inclination adjustment drive assembly 50. This not only facilitates the layout of the second braking assembly 90 and the inclination adjustment drive assembly 50 to complement and interfere with each other, but also ensures the uniform force on both sides during the rotation of the shaft sleeve 31.

[0033] Among them, the main shaft mechanism rotates inside the adjustment sleeve 40 arranged vertically, and the adjustment sleeve 40 rotates around its own axis and is rotationally matched with the box body 10. By rotating the adjustment sleeve 40 around its own axis and locking the adjusted adjustment sleeve 40 through the first braking assembly 80, the inclination orientation of the main shaft mechanism in the top view can be adjusted.

[0034] Specifically, as Figure 1 shown, the main shaft 30 is coaxially installed inside the shaft sleeve 31, and the shaft sleeve 31 is rotationally matched with the inner cavity of the adjustment sleeve 40 by the radial rotating shaft 311 on its side wall, and the shaft sleeve 31 is coaxially and evenly distributed in the inner cavity of the adjustment sleeve 40. This gap forms an adjustment space for the rotation adjustment of the main shaft 30.

[0035] Applied to the friction stir welding working condition, as Figure 2 shown, the main shaft 30 is rotationally matched inside the shaft sleeve 31, and a main shaft motor 20 is installed on the box body 10. The output end of the main shaft motor 20 is connected to the main shaft 30 through a universal coupling 21. After the inclination adjustment and the inclination orientation adjustment of the main shaft 30, the power drive for the rotation of the main shaft 30 can be realized.

[0036] It is worth mentioning that, as Figure 3 shown, the inclination angle adjustment of the main shaft mechanism and the adjustment of the inclination angle orientation share a power unit 70. Specifically, the power end of the power unit 70 can selectively transmit power between the inclination angle adjustment of the main shaft 30 and the rotary motion of the adjusting sleeve 40, which not only has a stable structure but also effectively reduces the cost of the device.

[0037] In this application, as Figure 2 shown, the adjusting sleeve 40 is installed on the box body 10 by rotating around its own axis, so that the main shaft 30 not only has the function of inclination angle adjustment, but also can rotate with the adjusting sleeve 40 to realize the adjustment of the inclination angle orientation. In addition, a main shaft motor 20 is installed on the box body 10, and the output end of the main shaft motor 20 is connected to the main shaft 30 through a universal coupling 21, so that after the inclination angle adjustment and the inclination angle orientation adjustment of the main shaft 30, the power drive for the rotation of the main shaft 30 can be realized.

[0038] It is worth mentioning that, as Figure 3 shown, the inclination angle adjustment of the main shaft mechanism and the adjustment of the inclination angle orientation share a power unit 70. Specifically, the power end of the power unit 70 can selectively transmit power between the inclination angle adjustment of the main shaft 30 and the rotary motion of the adjusting sleeve 40, which not only has a stable structure but also effectively reduces the cost of the device.

[0039] To facilitate a further understanding of the technical solution of this application, the inclination angle adjustment of the power unit 70 and the main shaft 30 and the adjustment of the inclination angle orientation are described separately as follows:

[0040] 1. Power unit 70

[0041] As Figure 3 shown, the power unit 70 includes an adjustment motor 71 installed on the box body 10. A spline shaft is coaxially fixed on the output shaft of the adjustment motor 71, and a spline sleeve 72 is slidably sleeved on the shaft body of the spline shaft. Among them, the power end of the power unit 70 is located on the spline sleeve 72, and the power end selectively transmits power between the inclination angle adjustment of the main shaft 30 and the rotary motion of the adjusting sleeve 40 by sliding the spline sleeve 72 up and down. In addition, the relationship between the spline sleeve 72 and the spline shaft keyway also enables the spline sleeve 72 to maintain a transmission connection with the output shaft of the adjustment motor 71 during the sliding process, maintaining the stable transmission of the power end of the power unit 70.

[0042] Specifically, as Figure 3As shown in the figure, the power end of the power unit 70 is a gear set. More specifically, the gear set includes a first driving gear 721 and a second driving gear 722 that are coaxially fixed on the rod body of the spline sleeve 72. Among them, the first driving gear 721 and the second driving gear 722 are respectively arranged adjacent to the power connection part where the adjusting sleeve 40 rotates and the power connection part for adjusting the inclination angle of the main shaft 30. Therefore, during the sliding process of the power end to switch the power transmission with the two power connection parts respectively, there is no need to move a long distance, which is convenient for more compact arrangement of each component.

[0043] In addition, as Figure 3 shown, the reciprocating motion of the power end of the power unit 70 is driven by a switching component 60 installed on the box body 10. The switching component 60 mainly includes a lifting cylinder 61 installed on the box body 10 for driving the sliding column 62 to slide along its own axial direction. In specific implementation, in order to reduce the radial force generated by the power end on the lifting cylinder 61 during power transmission, the switching component 60 further includes a sliding column 62 distributed along the axial direction of the adjusting sleeve 40. The sliding column 62 is slidably matched with the box body 10, and the sliding column 62 is connected to the power end of the power unit 70 through a bracket 621. Specifically, it is connected to the outer periphery of the spline sleeve 72 through the bracket 621. The specific connection method is that the bracket 621 is sleeved on the outer periphery of the spline sleeve 72 and a rotational fit is formed between the two, and a baffle for preventing the bracket 621 from sliding relative to the spline sleeve 72 is provided on the spline sleeve 72, and the sliding column 62 bears the radial force during the power transmission process of the power end. Further, as Figure 6 shown, a connecting ring 622 is fixed on the rod body of the sliding column 62, a ring groove is provided on the outer periphery of the connecting ring 622, and a plug disk 611 is fixed on the telescopic end of the lifting cylinder 61. The plug disk 611 is inserted and matched with the ring groove, so that the telescopic end of the lifting cylinder 61 forms a movable fit with the sliding column 62, reducing the force conduction of the power end on the lifting cylinder 61 during the power transmission process and improving the service life of the lifting cylinder 61.

[0044] 2. Inclination angle adjustment of the main shaft 30

[0045] As Figure 3 shown, the inclination angle adjustment of the main shaft 30 is mainly achieved by the power transmission between the inclination angle adjustment driving component 50 and the power end of the power unit 70, and then the inclination angle adjustment of the main shaft 30 is realized.

[0046] Specifically, as Figure 1 and Figure 3 shown, the inclination angle adjustment driving component 50 includes an adjusting bevel gear 53 distributed along the axial direction of the radial rotating shaft 311 and in transmission connection with the radial rotating shaft 311. In this implementation manner, the second driving gear 722 in the power unit 70 is a bevel gear structure that can be meshed and driven with the adjusting bevel gear 53.

[0047] As Figure 3As shown in the figure, for the convenience of installing the rotary encoder 58 to achieve stable control of the tilt angle, further, the tilt angle adjustment drive assembly 50 further includes a shaft seat 57 fixed to the bottom of the adjustment sleeve 40. The adjusting bevel gear 53 is rotatably fitted on the shaft seat 57, and a driving wheel 54 is coaxially fixed to the large end of the adjusting bevel gear 53. An adjusting wheel 55 is coaxially fixed on the radial rotating shaft 311, and a synchronous belt 56 is connected between the driving wheel 54 and the adjusting wheel 55. Thus, through the power transmission of the synchronous belt 56 between the driving wheel 54 and the adjusting wheel 55, the transmission connection between the adjusting bevel gear 53 and the radial rotating shaft 311 is realized. During implementation, the rotary encoder 58 is installed on the adjustment sleeve 40 to detect the rotation angle of the adjusting wheel 55, so as to misalign the adjusting bevel gear 53 and the rotary encoder 58 and prevent the rotary encoder 58 from interfering with the movement of the gear set of the power unit 70.

[0048] Furthermore, as Figure 3 shown in the figure, a second driven gear 51 with an axis distributed along the axial direction of the adjustment sleeve 40 is rotatably fitted at the bottom of the adjustment sleeve 40. A driven bevel gear 52 meshing with the adjusting bevel gear 53 is coaxially fixed on the second driven gear 51, and the meshing transmission of the gear set and the second driven gear 51 constitutes the transmission cooperation between the gear set and the adjusting bevel gear 53. In this implementation mode, during layout, the adjusting bevel gear 53 can be built into the bottom of the adjustment sleeve 40, which not only shortens the transmission stroke of the adjusting bevel gear 53, but also prevents the structures such as the shaft seat 57, the driving wheel 54, and the adjusting bevel gear 53 from protruding beyond the bottom outer edge of the adjustment sleeve 40 and causing movement interference problems with other components.

[0049] 3. Adjustment of the tilt orientation of the main shaft 30

[0050] As Figure 3 shown in the figure, the adjustment of the tilt orientation of the main shaft 30 is realized by the meshing transmission of a first driven gear 42 coaxially fixed to the outside of the adjustment sleeve 40 and a first driving gear 721 in the power unit 70. During use, by sliding the first driving gear 721 into the meshing state with the first driven gear 42, the first driven gear 42 and the adjustment sleeve 40 can be driven to rotate around their own axes by the rotation of the first driving gear 721, thereby driving the main shaft 30 to rotate around the axis of the adjustment sleeve 40 to achieve the adjustment of the tilt orientation of the main shaft 30.

[0051] Further, to lock the adjustment sleeve 40 after adjustment, as Figure 3 and Figure 4 shown in the figure, a first braking assembly 80 for locking the rotation of the adjustment sleeve 40 can also be provided on the box body 10.

[0052] Specifically, as Figure 5As shown, a first clamping ring 83 with a conical outer surface is sleeved and installed on the outer periphery of the adjusting sleeve 40. The first braking assembly 80 includes a first sliding clamping member 82 that can reciprocate axially along the adjusting sleeve 40 and can form an inclined wedge abutting and locking with the first clamping ring 83. Similarly to the second braking assembly 90, during operation, the first sliding clamping member 82 is driven by a power source to wedge-abut with the clamping ring of the adjusting sleeve 40 to lock the adjusting sleeve 40 after rotation.

[0053] On the above basis, as Figure 5 shown, the power drive of the first sliding clamping member 82 can also adopt an oil cylinder piston structure. Specifically, a first oil sleeve 81 is fixed on the box body 10, and a first piston cavity 813 coaxial with the adjusting sleeve 40 is formed inside the first oil sleeve 81; the first sliding clamping member 82 includes a piston ring 821 sliding in the first piston cavity 813 and a first clamping hoop 822 fixed to the piston ring 821 and axially penetrating the first oil sleeve 81. The first clamping hoop 822 forms a sliding seal with the first oil sleeve 81, and the inner periphery of the first clamping hoop 822 is set to a conical structure for wedge-abutting and locking with the first clamping ring 83. The forward cavity and the return cavity in the first piston cavity 813 are respectively connected to an external oil tank through a first unlocking oil hole 811 and a first braking oil hole 812. When in use, hydraulic oil is input into the first braking oil hole 812 through an oil pump, so as to push the piston ring 821 and the first clamping hoop 822 to slide towards the first clamping ring 83, thereby realizing the locking of the first clamping ring 83 and the adjusting sleeve 40; hydraulic oil is input into the first unlocking oil hole 811 through an oil pump to push the piston ring 821 and the first clamping hoop 822 to move away from the first clamping ring 83, realizing the rotational unlocking of the first clamping ring 83 and the adjusting sleeve 40.

[0054] In specific implementation, the first clamping ring 83 preferably adopts the form of a second contraction gap 931 provided in the second clamping ring 93. In this implementation manner, the connection between the first clamping ring 83 and the adjusting sleeve 40 can adopt a sliding sleeve arrangement.

[0055] To further understand the working mode of the present application, the working steps of the present application are described below:

[0056] S1. When the inclination angle of the main shaft 30 needs to be adjusted, the first braking assembly 80 locks the adjusting sleeve 40, and the second braking assembly 90 releases the locking of the shaft sleeve 31;

[0057] S2. The power end of the power unit 70 moves to the state of power transmission with the inclination angle adjustment drive assembly 50, and the power unit 70 drives the shaft sleeve 31 to rotate around the radial rotating shaft 311 to adjust the inclination angle of the main shaft 30;

[0058] S3. When the inclination angle of the main shaft 30 is adjusted to the required angle, the second braking assembly 90 locks and brakes the shaft sleeve 31;

[0059] S4. When it is necessary to further adjust the inclination direction of the main shaft 30, the first braking assembly 80 releases the locking of the adjusting sleeve 40, and the power end of the power unit 70 moves to a state of power transmission with the first driven gear 42 on the adjusting sleeve 40;

[0060] S5. The power unit 70 drives the first driven gear 42 and the adjusting sleeve 40 to rotate to adjust the inclination direction of the main shaft 30, and after the adjustment, the first braking assembly 80 locks and brakes the adjusting sleeve 40.

[0061] Of course, for those skilled in the art, the present utility model is not limited to the details of the above exemplary embodiments, but also includes the same or similar structures that can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be encompassed within the present utility model. Any reference signs in the claims should not be construed as limiting the claimed rights.

[0062] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative manner of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0063] The technologies, shapes, and structures not described in detail in the present utility model are all well-known technologies.

Claims

1. A friction stir welding spindle inclination adjustment and locking mechanism, characterized in that: The invention comprises a shaft sleeve (31) and a main shaft (30) coaxially rotatably fitted in the inner cavity of the shaft sleeve (31); a radial rotating shaft (311) is fixed to the side wall of the shaft sleeve (31); the radial rotating shaft (311) is rotatably fitted on a rotating seat (41) of an adjusting sleeve (40) around its own axis; the outer end of the radial rotating shaft (311) is in a conical structure with a wider inner side and a narrower outer side; a second sliding clamping member (92) is installed on the rotating seat (41) and can slide back and forth along the axial direction of the radial rotating shaft (311) and can form an inclined wedge abutment and locking with the radial rotating shaft (311).

2. A friction stir welding spindle inclination adjustment locking mechanism according to claim 1, characterized in that: The second sliding clamping member (92) includes a second clamping hoop (922) coaxially arranged with the radial rotating shaft (311), and the inner cavity of the second clamping hoop (922) has a conical structure adapted to the outer peripheral contour of the outer end of the radial rotating shaft (311).

3. A friction stir welding spindle inclination adjustment locking mechanism according to claim 2, characterized in that: The outer end of the radial rotating shaft (311) is sleeved with a second clamping ring (93), which is configured as a conical ring structure adapted to the outer end of the radial rotating shaft (311), and a second shrinkage gap (931) distributed along the oblique side of the second clamping ring (93) in the length direction is provided at the narrow mouth of the second clamping ring (93).

4. A friction stir welding spindle inclination adjustment locking mechanism according to claim 3, characterized in that: The second shrinkage gaps (931) are arranged to be at least two evenly distributed around the circumference of the second clamping ring (93).

5. A friction stir welding spindle inclination adjustment and locking mechanism according to any one of claims 2 to 4, characterized in that: A second oil sleeve (91) is fixed to the outer side of the swivel seat (41), and a second piston chamber (913) coaxially arranged with the radial rotating shaft (311) is formed inside the second oil sleeve (91). The second sliding clamping member (92) also includes a piston block (921) sliding in the second piston chamber (913), and the second clamping hoop (922) is fixed to the piston block (921). The second clamping hoop (922) axially penetrates the second oil sleeve (91) and forms a sliding seal with the second oil sleeve (91). The progress chamber and the return chamber in the second piston chamber (913) are connected to the external oil tank through the second unlocking oil hole (911) and the second brake oil hole (912) respectively.

6. A friction stir welding spindle inclination adjustment and locking mechanism according to any one of claims 1 to 4, characterized in that: It also includes an inclination angle adjustment drive assembly (50) for driving the shaft sleeve (31) to perform a rotational motion around the radial rotation axis (311).

7. The friction stir welding spindle inclination adjustment and locking mechanism according to claim 1, characterized in that: The swivel seat (41) and the radial rotating shaft (311) form a swivel unit, and the swivel unit is arranged as two symmetrically distributed on both sides of the shaft sleeve (31), wherein the radial rotating shaft (311) of one swivel unit cooperates with the second sliding clamping member (92), and the radial rotating shaft (311) of the other swivel unit cooperates with the power end of the inclination adjustment drive assembly (50).

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