Angle-adjustable shaft head

Abstract

The utility model discloses an angle-adjustable shaft head, which relates to the technical field of machining and comprises a cutter handle, a U-shaped fixing seat, a rotating seat, a first bevel gear, a second bevel gear, a third bevel gear and a transmission shaft. The motor rotates to be transmitted to the cutter through the cutter handle, the first bevel gear, the second bevel gear, the third bevel gear and the transmission shaft in sequence, the rotating base is rotationally arranged between two supporting arms of the U-shaped fixing base, the middle of the transmission shaft is rotationally arranged in the rotating base, and a rotating shaft of the rotating base coincides with the axis of the second bevel gear. A locking mechanism is arranged on a support arm of the U-shaped fixing seat; by loosening the locking mechanism, the rotating seat can rotate to drive the transmission shaft and the cutter to swing in the U-shaped fixing seat, the vertical state can be swung to the horizontal state, the vertical state, the horizontal state and the inclined state can be switched through locking at any time, the adjustability of the shaft head is improved, the structure is compact, and the occupied space is small.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical processing, in particular to a shaft head with adjustable angle. Background Art

[0002] CNC machining centers are commonly used mechanical processing equipment, which are mainly composed of a bed, a connecting spindle and a spindle head. The parts to be processed are placed on the bed, and the connecting spindle drives the spindle head to move to the parts to be processed for processing. However, conventional CNC machining centers can only perform vertical processing from the top down, and cannot perform tilted or horizontal processing. This requires operators to constantly change the placement angle of the parts to be processed, or transfer the parts to a machining center with another processing angle for processing, which increases the operating steps, increases labor, and has a low degree of automation. In some technologies, in order to improve the functionality of the CNC machining center, a vertical spindle and a horizontal spindle are set up in the same machining center at the same time, and the vertical spindle and the horizontal spindle are controlled by the control system to process the parts, but they have the problems of complex structure and large space occupation.

[0003] Therefore, people are in urgent need of an angle-adjustable shaft head that can reduce space occupation while ensuring that the processing angle is adjustable. Summary of the Invention

[0004] The purpose of the utility model is to provide an angle-adjustable shaft head to solve the problems existing in the above-mentioned prior art. By adjusting the position of the rotating seat, the angle can be adjusted while ensuring the transmission between the bevel gears, so that the processing angle is adjustable and the space occupied is small.

[0005] To achieve the above-mentioned purpose, the present invention provides the following solution: The present invention provides an angle-adjustable shaft head, comprising a tool holder, a U-shaped fixed seat, a rotating seat, a first bevel gear, a second bevel gear, a third bevel gear and a transmission shaft, the tool holder passes through the bottom arm of the U-shaped fixed seat, the tool holder is rotatably connected to the U-shaped fixed seat, the end of the tool holder away from the main shaft is fixedly provided with the first bevel gear, the two arms of the U-shaped fixed seat are arranged downwardly, the rotating seat is rotatably arranged between the two arms of the U-shaped fixed seat, the second bevel gear is rotatably arranged on the inner side of the arm of the U-shaped fixed seat, the first bevel gear and the second bevel gear are meshed for transmission, the second bevel gear and the third bevel gear are meshed for transmission, the third bevel gear is fixedly connected to the transmission shaft, the end of the transmission shaft away from the third bevel gear is fixedly connected to the tool, the middle part of the transmission shaft is rotatably arranged in the rotating seat, the rotating axis of the rotating seat coincides with the axis of the second bevel gear, and a locking mechanism for locking the rotation angle of the rotating seat is provided on the arm of the U-shaped fixed seat.

[0006] Preferably, the locking mechanism includes at least one T-shaped block and a locking bolt, and a circular annular groove body is provided at a position of the rotating seat near the support arm of the U-shaped fixing seat, the circular annular groove body is coaxially arranged with the second bevel gear, the cross-section of the circular annular groove body is T-shaped, the T-shaped block has an arc structure with the same curvature radius as the circular annular groove body, the T-shaped block is slidably arranged in the circular annular groove body, a locking threaded hole is provided on the T-shaped block, and a through hole is provided on the outer surface of the support arm of the U-shaped fixing seat, the axis of the through hole is parallel to the axis of the threaded hole, and the locking bolt passes through the through hole and is threadedly connected to the locking threaded hole.

[0007] Preferably, the annular groove body is provided with a through hole for the T-shaped block to be installed and removed.

[0008] Preferably, a connecting mechanism is fixedly provided at one end of the U-shaped fixing seat close to the knife handle, and the connecting mechanism extends radially toward the knife handle to form an extension portion, and a positioning pin is provided on the upper surface of the extension portion, and a positioning hole is provided on the main shaft corresponding to the position of the positioning pin.

[0009] Preferably, the bottom arm of the U-shaped fixing seat is cylindrical, and the connecting mechanism includes two semicircular fasteners, one end of the two fasteners is integrally arranged, and the other end has an adjustment gap. The two fasteners are sleeved on the end of the bottom arm of the U-shaped fixing seat close to the main shaft, and the ends of the two fasteners close to the adjustment gap are connected by an adjustment bolt for controlling the size of the adjustment gap.

[0010] The U-shaped fixing seat is provided with a plurality of holes, each of which is provided with a plurality of holes, and the holes are connected to form a plurality of holes.

[0011] Preferably, the outer diameter of the annular flange is smaller than the outer diameter of the annular groove, the bottom of the annular protrusion of the tool handle is provided with an annular plug-in piece, the annular plug-in piece is inserted between the annular groove and the annular flange, and the middle part of the positioning pin is provided with a telescopic rod that extends the positioning pin in the initial state along the axial sliding. The extension part is provided with a control inner cavity corresponding to the position of the telescopic rod, and a spring is vertically provided in the control inner cavity, and the telescopic rod contacts the spring through the control plate, and the extension part is provided with a movement cavity corresponding to the cavity between the annular groove and the annular flange, the depth of the movement cavity is greater than the depth of the cavity between the shaped groove and the annular flange, a control rod is provided in the movement cavity, and the control rod is fixedly connected to the control plate, and the annular plug-in piece is provided with a downward-opening limit groove corresponding to the position of the control rod, and the end of the control rod away from the control plate extends into the limit groove, and the downward pressure of the telescopic rod drives the control rod to move downward and disengage from the limit groove.

[0012] Preferably, a scale ring is embedded in the large diameter end of the U-shaped fixing seat near the end of the fastener, and an arrow mark pointing to the scale ring is provided on the outer peripheral wall of the fastener.

[0013] Preferably, the second bevel gear is arranged on a connecting column via a plane bearing, the connecting column is cylindrical, and one end of the connecting column is detachably connected to the support arm of the U-shaped fixing seat.

[0014] Preferably, a rotating cavity is provided in the rotating seat, a connecting bearing is provided in the rotating cavity, the outer ring of the connecting bearing is fixed on the inner wall of the rotating cavity, an internal thread is provided on the inner wall surface of the inner ring, and the transmission shaft is connected to the inner ring of the connecting bearing through the thread.

[0015] Compared with the prior art, the present invention has achieved the following technical effects:

[0016] By loosening the locking mechanism, the rotating seat can be rotated at this time. When the rotating seat is rotating, it drives the transmission shaft and the tool to swing in the U-shaped fixed seat. It can swing from a vertical state to a horizontal state and can be locked at any time to achieve vertical, horizontal and inclined switching, which greatly improves the machinable range and the adjustability of the shaft head. It also has a compact structure and occupies little space.

[0017] Compared with the prior art, other solutions of the present invention have achieved the following technical effects:

[0018] When tightening the locking bolt, the T-shaped block will move away from the circular groove body, but the two sides of the T-shaped block will be blocked by the inner walls on both sides of the notch of the circular groove body. As the locking bolt is further tightened, the extrusion force and friction force between the T-shaped block and the circular groove body are greatly increased, thereby achieving the purpose of locking. Moreover, when the rotating seat needs to be adjusted, it is only necessary to loosen the locking bolt, which improves the convenience of operation.

[0019] By adjusting the tightness of the two fasteners, the circumferential rotation angle of the U-shaped fixing seat can be adjusted and locked, further improving the adjustability of the shaft head.

[0020] When the tool handle is installed in place, the positioning pin will also be installed in place. At this time, the telescopic rod will be pressed by the inner bottom wall of the positioning hole and retracted into the positioning pin. The retraction of the telescopic rod will squeeze the control board downward, and the control board will drive the control rod to move downward and out of the limit slot. At this time, the tool handle can rotate normally. The telescopic rod can be used as a positioning detection element. Only after it is installed in place can transmission be carried out. When it is not installed in place, the control rod is located in the limit slot to limit transmission. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 This is a schematic structural diagram of the angle-adjustable shaft head of the utility model;

[0023] Figure 2 This is a schematic diagram of the transmission structure of the angle-adjustable shaft head of the utility model;

[0024] Figure 3 This is a schematic diagram of the structure of the fastener of the utility model;

[0025] Figure 4 This is a structural diagram of the U-shaped fixed seat and the rotating seat of the utility model;

[0026] Figure 5 This is a schematic diagram of the structure of the T-shaped block connection of the utility model;

[0027] Figure 6 This is a schematic diagram of the cross-sectional structure of the angle-adjustable shaft head of the utility model;

[0028] Among them, 1. tool handle; 2. U-shaped fixed seat; 3. rotating seat; 4. first bevel gear; 5. second bevel gear; 6. third bevel gear; 7. transmission shaft; 8. T-shaped block; 9. annular groove body; 10. locking threaded hole; 11. through hole; 12. positioning pin; 13. fastener; 14. adjustment gap; 15. adjustment bolt; 16. annular groove; 17. annular protrusion; 18. tightening member; 19. annular flange; 20. annular connector; 21. telescopic rod; 22. control board; 23. spring; 24. control rod; 25. motion cavity; 26. limit groove; 27. scale ring; 28. connecting column; 29. ​​rotating shaft. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0030] The purpose of the utility model is to provide an angle-adjustable shaft head to solve the problems existing in the prior art. By adjusting the position of the rotating seat, the angle can be adjusted while ensuring the transmission between the bevel gears, so that the processing angle is adjustable and the space occupied is small.

[0031] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0032] Please refer to Figures 1 to 6As shown, an angle-adjustable shaft head is provided, including a tool handle 1, a U-shaped fixed seat 2, a rotating seat 3, a first bevel gear 4, a second bevel gear 5, a third bevel gear 6 and a transmission shaft 7. The main shaft is a movable part arranged on the frame of a CNC machining center and has a built-in motor. The tool handle 1 is used for transmission connection with the motor in the main shaft. A matching hole matching the tool handle 1 is provided on the bottom arm of the U-shaped fixed seat 2. The tool handle 1 passes through the bottom arm of the U-shaped fixed seat 2. The tool handle 1 and the U-shaped fixed seat 2 are rotatably connected through a bearing. The end of the tool handle 1 away from the main shaft is fixedly provided with a first bevel gear 4. The two arms of the U-shaped fixed seat 2 are arranged downward, that is, arranged in a direction away from the main shaft. The rotating seat 3 is rotatably provided between the two arms of the U-shaped fixed seat 2. The second bevel gear 5 is rotatably provided on the inner side of the arm of the U-shaped fixed seat 2. The first bevel gear 4 and the second bevel gear 5 meshing transmission, the second bevel gear 5 is meshing with the third bevel gear 6 for transmission, the third bevel gear 6 is fixedly connected to the transmission shaft 7, and a sleeve is provided at one end of the transmission shaft 7 away from the third bevel gear 6, which is used to fix the connection tool, and the middle part of the transmission shaft 7 is rotatably arranged in the rotating seat 3, and the rotating axis of the rotating seat 3 coincides with the axis of the second bevel gear 5. A locking mechanism for locking the rotation angle of the rotating seat 3 is provided on the support arm of the U-shaped fixed seat 2. By loosening the locking mechanism, the rotating seat 3 can be rotated at this time. When the rotating seat 3 is rotating, it drives the transmission shaft 7 and the tool to swing in the U-shaped fixed seat 2, which can be swung from a vertical state to a horizontal state, and can be locked at any time to realize vertical, horizontal and inclined switching, which greatly improves the processing range and the adjustability of the shaft head, and has a compact structure and occupies little space.

[0033] The specific structure of the locking mechanism is as follows: it includes at least one T-shaped block 8 and a locking bolt. A circular annular groove body 9 is provided at the position of the support arm of the rotating seat 3 close to the U-shaped fixing seat 2. The circular annular groove body 9 is coaxially arranged with the second bevel gear 5. The cross section of the circular annular groove body 9 is a T-shape that matches the T-shaped block 8. The T-shaped block 8 has an arc structure with the same curvature radius as the circular annular groove body 9. The T-shaped block 8 is slidably arranged in the circular annular groove body 9. A locking threaded hole 10 is provided on the T-shaped block 8. A through hole is provided on the outer surface of the support arm of the U-shaped fixing seat 2. The axis of the through hole is parallel to the axis of the locking threaded hole 10. The locking bolt passes through the through hole and is threadedly connected to the locking threaded hole 10. In the process of tightening the locking bolt, the T-shaped block 8 will move in the direction away from the circular annular groove body 9, but the two side edges of the T-shaped block 8 will be blocked by the inner walls on both sides of the notch of the circular annular groove body 9. As the locking When the cam 3 is tightened, the locking bolt 8 is tightened again, and the locking bolt 8 is tightened again, so that the cam 3 is tightened again.

[0034] In order to facilitate subsequent maintenance and replacement operations, a through hole 11 for installing and removing the T-shaped block 8 is provided on the annular groove body 9. The through hole 11 has the same curvature radius as the T-shaped block 8, and the T-shaped block 8 as a whole can be installed into or removed from the through hole 11.

[0035] A connecting mechanism is fixedly provided at one end of the U-shaped fixing seat 2 close to the tool handle 1, and the connecting mechanism extends radially toward the tool handle 1 to form an extension portion. A positioning pin 12 is provided on the upper surface of the extension portion, and a positioning hole is provided at the position of the main shaft corresponding to the positioning pin 12. When the tool handle 1 is installed, the positioning pin 12 is aligned with the positioning hole and inserted, so as to limit the axial movement of the U-shaped fixing seat 2 and improve the operation stability.

[0036] The bottom arm of the U-shaped fixing seat 2 is cylindrical, and the connecting mechanism includes two semicircular ring-shaped fasteners 13. The fasteners 13 need to be made of metal with a certain toughness. The two fasteners 13 are integrally arranged at one end and have an adjusting gap 14 at the other end. The two fasteners 13 are sleeved on the end of the bottom arm of the U-shaped fixing seat 2 close to the main shaft. The ends of the two fasteners 13 close to the adjusting gap 14 are connected by an adjusting bolt 15 for controlling the size of the adjusting gap 14. When the adjusting bolt 15 is tightened, the adjusting gap 14 becomes smaller, and the extrusion force and friction force of the two fasteners 13 on the U-shaped fixing seat 2 become greater, so as to achieve locking. When the adjusting bolt 15 is loosened, the adjustment gap 14 becomes larger, and the extrusion force and friction force of the two fasteners 13 on the U-shaped fixing seat 2 become smaller, so as to achieve locking. At this time, the U-shaped fixing seat 2 can be manually rotated to realize that the U-shaped fixing seat 2 drives the rotating seat 3 to perform circumferential rotation adjustment, further improving the adjustability and making it adaptable to more processing conditions.

[0037] The bottom arm of the U-shaped fixing seat 2 is a stepped cylindrical shape, and the small diameter end of the U-shaped fixing seat 2 is arranged close to the main shaft. The outer diameter of the annular structure formed by the two fasteners 13 matches the outer diameter of the large diameter end of the bottom arm of the U-shaped fixing seat 2, and the inner diameter matches the outer diameter of the small diameter end of the bottom arm of the U-shaped fixing seat 2. The upper surface of the annular structure formed by the two fasteners 13 is provided with an annular groove 16. The inner diameter of the annular groove 16 is the same as the inner diameter of the annular structure, and the outer diameter is smaller than the outer diameter of the annular structure. The inner bottom surface of the annular groove 16 coincides with the end face of the small diameter end of the U-shaped fixing seat 2. The tool handle 1 is coaxially connected to the bottom arm of the U-shaped fixing seat 2 through a bearing. An annular protrusion 17 for supporting the bearing is provided in the inner cavity of the U-shaped fixing seat 2, and the annular protrusion 17 can be a ring-shaped fixing seat 2. The annular structure can be formed into a body, or it can be an annular structure with an external thread that is screwed in by a thread, or it can utilize a bearing as an annular protrusion 17, and the inner wall surface of the inner ring of the bearing is provided with a thread, which is threadedly connected to the tool handle 1 to improve stability, and the small diameter end port of the U-shaped fixing seat 2 is threadedly connected with a tightening member 18, and the tightening member 18 is provided with an annular flange 19 at the end away from the U-shaped fixing seat 2, and the outer diameter of the annular flange 19 is larger than the diameter of the small diameter end port of the U-shaped fixing seat 2. The annular flange 19 cooperates with the stepped surface of the U-shaped fixing seat 2 to realize axial positioning of the fastener 13, thereby improving its installation stability, and the tightening member 18 cooperates with the annular protrusion 17 to position the internal bearing of the U-shaped fixing seat 2, and the preload force on the bearing can be controlled by controlling the screwing depth of the tightening member 18.

[0038] The outer diameter of the annular flange 19 is smaller than the outer diameter of the annular groove 16. An annular connector 20 is provided at the bottom of the annular protrusion 17 of the tool handle 1. The annular connector 20 and the tool handle 1 can be integrally provided or welded. The annular connector 20 is inserted between the annular groove 16 and the annular flange 19 to position the installation of the tool handle 1 and improve the installation accuracy. A telescopic rod 21 is provided in the middle of the locating pin 12 along the axial sliding direction, which extends out of the locating pin 12 in the initial state. A control cavity is provided at the extension portion corresponding to the position of the telescopic rod 21. A spring 23 is vertically provided in the control cavity. The telescopic rod 21 contacts the spring 23 through the control plate 22. One end of the spring 23 is welded to the inner bottom wall of the control cavity, and the other end is welded to the control plate 22. The extension portion corresponds to the cavity between the annular groove 16 and the annular flange 19 and is provided with a motion cavity 25. The depth of the motion cavity 25 is greater than the depth of the cavity between the annular groove and the annular flange 19. A control rod 24 is provided in the motion cavity 25. The control rod 24 is welded to the control plate 22. The annular connector 20 is provided with a downward-opening limiting groove 26 at the position corresponding to the control rod 24. The end of the control rod 24 away from the control plate 22 extends into the limiting groove 26. When the telescopic rod 21 is not inserted into the positioning hole, it is affected by the elastic force of the spring 23 and the telescopic rod 21 extends out of the positioning pin 12. At this time, the control rod 24 is affected by the elastic force of the spring 23 along with the control plate 22 and is located in the limiting groove 26. When the positioning pin 12 is inserted into the positioning hole, The telescopic rod 21 is pressed down to drive the control rod 24 to move downward and disengage from the limit groove 26. After the telescopic rod 21 is completely controlled to enter the positioning pin 12, the control rod 24 just disengages from the limit groove 26 and enters the lower space of the motion cavity 25 relative to the annular groove 16, that is, the initial extension length of the telescopic rod 21 is equal to the vertical distance between the highest horizontal surface of the control rod 24 in the initial state and the inner bottom wall of the annular groove 16. When the knife handle 1 is installed in place, the positioning pin 12 will also be installed in place. At this time, the telescopic rod 21 will be supported by the inner bottom wall of the positioning hole and retracted into the positioning pin 12. The retraction of the telescopic rod 21 will squeeze the control plate 22 downward, and the control plate 22 drives the control rod 24 to move downward and disengage from the limit groove 26. At this time, the knife handle 1 can be normally Rotation, the telescopic rod 21 can be used as a positioning detection original. Transmission can only be carried out after it is installed in place. When it is not installed in place, the control rod 24 is located in the limit groove 26 to limit transmission. The detection method is: manually rotate the tool to see if it can be rotated. If it can be rotated, it means that the positioning pin 12 has been inserted into place; the telescopic rod 21 can also be used to directly press the control rod 24 welded on the spring 23 to move up and down. At this time, the bottom of the telescopic rod 21 is provided with a semicircular groove structure that matches the control rod 24 to improve the stability of the pressing; or the bottom end of the telescopic rod 21 is provided with a one-piece molding with the control rod 24, and the bottom end of the telescopic rod 21 is a plate shape that matches the control cavity, which directly presses the spring 23.

[0039] A scale ring 27 is embedded in the large-diameter end of the U-shaped fixing base 2 near the end of the fastener 13. The scale ring 27 can be fixed to the U-shaped fixing base 2 by bolts so that it rotates circumferentially with the U-shaped fixing base 2. At the same time, an arrow mark pointing to the scale ring 27 is provided on the outer peripheral wall of the fastener 13, such as a raised small arrow or an arrow sticker to indicate the scale of the scale ring 27. In the initial state, the arrow points to the zero scale of the scale ring 27. This structure makes it easy to observe the current rotation angle of the U-shaped fixing base 2.

[0040] The second bevel gear 5 is arranged on the connecting column 28 through a plane bearing. The connecting column 28 is cylindrical. One end of the connecting column 28 is detachably connected to the support arm of the U-shaped fixing seat 2. The detachable connection method can be a bolt connection, or a threaded connection can be directly set at the end of the connecting column 28 to be connected to the support arm of the U-shaped fixing seat 2; or the second bevel gear 5 is directly set to be fixedly connected to the connecting column 28, and the connecting column 28 is rotatably connected to the support arm of the U-shaped fixing seat 2 through a bearing.

[0041] The second bevel gear 5 is provided with a rotating shaft 29 at the end away from the U-shaped fixed seat 2, and the end of the rotating shaft 29 away from the second bevel gear 5 is rotatably connected to the other arm of the U-shaped fixed seat 2 through a bearing, or the end of the rotating shaft 29 away from the second bevel gear 5 is rotatably connected to the other connecting column through a plane bearing, and the other connecting column is detachably connected to the U-shaped fixed seat 2 and the connecting column 28 in the same manner. A screw is provided on the end face of the second bevel gear 5 close to the rotating shaft 29, and a screw hole is provided on the rotating shaft 29, and the two are threadedly connected. The first bevel gear 4 and the tool handle 1, the second bevel gear 5 and the connecting column 28, and the third bevel gear 6 and the transmission shaft 7 are all threadedly connected through the screw holes, which are convenient for disassembly and replacement.

[0042] A rotating cavity is provided in the rotating seat 3, and a connecting bearing is provided in the rotating cavity. The outer ring of the connecting bearing is fixed on the inner wall of the rotating cavity, and an internal thread is provided on the inner wall surface of the inner ring. The transmission shaft 7 is connected to the inner ring of the connecting bearing through the thread.

[0043] During actual use, the tool handle 1 receives the motion of the motor and transmits it to the first bevel gear 4, and then transmits the rotation to the transmission shaft 7 through the second bevel gear 5 and the third bevel gear 6. The transmission shaft 7 drives the tool to work. When it is necessary to adjust the angle of the rotating seat 3, the motor in the spindle is stopped, the locking bolt is loosened, the rotating seat 3 is manually adjusted, and the locking bolt is tightened to complete the fixation and start the motor to continue working. When it is necessary to adjust the U-shaped fixing seat 2, the motor in the spindle is stopped, the adjusting bolt 15 is loosened, the U-shaped fixing seat 2 is manually adjusted, and the adjusting bolt 15 is tightened to complete the fixation and start the motor to continue working.

[0044] Adaptive changes based on actual needs are all within the protection scope of this utility model.

[0045] It should be noted that it is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, from all perspectives, the embodiments should be regarded as illustrative and non-restrictive. The scope of the present invention is defined by the appended claims, not the foregoing description, and it is intended that all variations within the meaning and range of equivalents of the claims be encompassed within the present invention. Any reference signs in the claims should not be construed as limiting the claim to which they relate.

[0046] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. At the same time, those skilled in the art will find that the specific implementation methods and application scopes may vary based on the concept of the present invention. In summary, the contents of this specification should not be construed as limiting the present invention.

Claims

1. An angle-adjustable shaft head, characterized in that: The transmission shaft is fixedly connected to the tool holder, and the middle part of the transmission shaft is rotatably arranged in the rotating seat, and the rotating shaft of the rotating seat coincides with the axis of the second bevel gear. A locking mechanism for locking the rotation angle of the rotating seat is provided on the support arm of the U-shaped fixed seat.

2. The angle-adjustable shaft head according to claim 1, characterized in that: The locking mechanism includes at least one T-shaped block and a locking bolt. A circular annular groove is provided at a position of the rotating seat near the support arm of the U-shaped fixing seat. The circular annular groove is coaxially arranged with the second bevel gear. The cross-section of the circular annular groove is T-shaped. The T-shaped block has an arc structure with the same curvature radius as the circular annular groove. The T-shaped block is slidably arranged in the circular annular groove. A locking threaded hole is provided on the T-shaped block. A through hole is provided on the outer surface of the support arm of the U-shaped fixing seat. The axis of the through hole is parallel to the axis of the threaded hole. The locking bolt passes through the through hole and is threadedly connected to the locking threaded hole.

3. The angle-adjustable shaft head according to claim 2, characterized in that: The annular groove body is provided with a through hole for the T-shaped block to be installed and removed.

4. The angle-adjustable shaft head according to claim 1, characterized in that: A connecting mechanism is fixedly provided at one end of the U-shaped fixing seat close to the knife handle, and the connecting mechanism extends radially toward the knife handle to form an extension portion. A positioning pin is provided on the upper surface of the extension portion, and a positioning hole is provided on the main shaft corresponding to the position of the positioning pin.

5. The angle-adjustable shaft head according to claim 4, characterized in that: The bottom arm of the U-shaped fixing seat is cylindrical, and the connecting mechanism includes two semicircular fasteners, one end of the two fasteners is integrally arranged, and the other end has an adjustment gap. The two fasteners are sleeved on the end of the bottom arm of the U-shaped fixing seat close to the main shaft, and the ends of the two fasteners close to the adjustment gap are connected by an adjustment bolt for controlling the size of the adjustment gap.

6. The angle-adjustable shaft head according to claim 5, characterized in that: The bottom arm of the U-shaped fixing seat is a stepped cylinder, and the small diameter end of the U-shaped fixing seat is arranged near the main shaft, and the outer diameter of the annular structure formed by the two fasteners connecting the two fasteners matches the outer diameter of the large diameter end of the bottom arm of the U-shaped fixing seat, and the inner diameter matches the outer diameter of the small diameter end of the bottom arm of the U-shaped fixing seat. The upper surface of the annular structure formed by the two fasteners connecting the two fasteners is provided with an annular groove, the inner diameter of the annular groove is the same as the inner diameter of the annular structure, and the outer diameter is smaller than the outer diameter of the annular structure. The inner bottom surface of the annular groove coincides with the end surface of the small diameter end of the U-shaped fixing seat, and the tool handle is coaxially connected to the bottom arm of the U-shaped fixing seat by a bearing. An annular protrusion for supporting the bearing is provided in the inner cavity of the U-shaped fixing seat, and the small diameter end port of the U-shaped fixing seat is threadedly connected to a tightening piece, and the tightening piece is provided with an annular flange at one end away from the U-shaped fixing seat, and the outer diameter of the annular flange is larger than the diameter of the small diameter end port of the U-shaped fixing seat.

7. The angle-adjustable shaft head according to claim 6, characterized in that: The outer diameter of the annular flange is smaller than the outer diameter of the annular groove, and the bottom of the annular protrusion of the tool handle is provided with an annular plug-in piece, and the annular plug-in piece is inserted between the annular groove and the annular flange, and the middle part of the positioning pin is axially slidably provided with a telescopic rod extending the positioning pin in the initial state. The extension part is provided with a control inner cavity corresponding to the position of the telescopic rod, and a spring is vertically provided in the control inner cavity, and the telescopic rod contacts the spring through the control plate. The extension part is provided with a movement cavity corresponding to the cavity between the annular groove and the annular flange, and the depth of the movement cavity is greater than the depth of the cavity between the shaped groove and the annular flange, and a control rod is provided in the movement cavity, and the control rod is fixedly connected to the control plate, and the annular plug-in piece is provided with a downward-opening limit groove corresponding to the position of the control rod, and the end of the control rod away from the control plate extends into the limit groove, and the downward pressure of the telescopic rod drives the control rod to move downward and disengage from the limit groove.

8. The angle-adjustable shaft head according to claim 6, characterized in that: A scale ring is embedded in the large diameter end of the U-shaped fixing seat close to the end of the fastener, and an arrow mark pointing to the scale ring is provided on the outer peripheral wall of the fastener.

9. The angle-adjustable shaft head according to claim 1, characterized in that: The second bevel gear is arranged on a connecting column through a plane bearing. The connecting column is cylindrical. One end of the connecting column is detachably connected to the support arm of the U-shaped fixing seat.

10. The angle-adjustable shaft head according to claim 1, characterized in that: A rotating cavity is provided in the rotating seat, a connecting bearing is provided in the rotating cavity, the outer ring of the connecting bearing is fixed on the inner wall of the rotating cavity, an internal thread is provided on the inner wall surface of the inner ring, and the transmission shaft is connected to the inner ring of the connecting bearing through the thread.

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