Shaping power arbor
By using a tilting sliding sleeve and cam disc structure, the wear problem during the retraction of the gear shaping power tool holder is solved, the tool head lifting action and sealing are realized, and the tool head can be adapted to different installation methods, thus improving service life and versatility.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- YUHUAN TUYUAN MECHANICAL & ELECTRICAL CO LTD
- Filing Date
- 2025-08-18
- Publication Date
- 2026-07-14
AI Technical Summary
Existing gear hobbing power tool holders are prone to wear during tool retraction and are difficult to adapt to tool heads with different mounting methods.
It adopts an inclined sliding sleeve and cam disk structure, which realizes the cutting head retraction and lifting action through the inclined sliding sleeve and cam disk, and prevents loosening through the design of limit wheel and nut, and improves sealing by combining flexible ring.
It effectively avoids wear on the cutter head during retraction, adapts to different installation methods of the cutter head, and improves the service life and sealing performance of the cutter head.
Smart Images
Figure CN224487885U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of machining tool technology, and in particular to a gear shaping power tool holder. Background Technology
[0002] A gear shaper power tool holder is a type of power head on a machine tool, mounted on the machine tool's power turret. It uses a drive motor within the turret to drive the tool head in a linear reciprocating motion, replacing the gear shaping and slotting machining processes on a gear shaper machine. If the movement trajectory of the gear shaper tool during advance and retraction is the same straight line, the tool is more likely to come into contact with the workpiece during retraction, leading to friction, wear, and reduced service life.
[0003] The utility model patent with publication number CN219169791U discloses an automatic tool lifting gear holder, including a base, a main support, a transmission shaft, a connecting mechanism, a sliding plate, and a tool lifting rod. The connecting mechanism includes an eccentric wheel, an eccentric shaft, a connecting rod, a copper sleeve, and a push shaft. The transmission shaft is connected to the eccentric wheel, and the eccentric wheel drives the eccentric shaft, which in turn drives the connecting rod, to reciprocate the push shaft. The sliding plate is mounted on the main support via a linear cross roller guide. A tool lifting guide wheel is sleeved between the push shaft and the tool lifting rod. The tool lifting guide wheel has an annular guide groove with two parts of different heights that are parallel and offset at 180°. The tool lifting rod is connected to the sliding plate via a fulcrum shaft. The tool lifting action is achieved when the tool lifting rod retracts by cooperating with the tool lifting guide wheel and the fulcrum shaft.
[0004] Regarding the aforementioned technologies, which utilize a lifting guide wheel in conjunction with a fulcrum shaft to achieve the lifting action of the lifting rod during retraction, thus avoiding wear on the cutting head during retraction, this application provides another solution. Utility Model Content
[0005] This application provides a gear shaping power tool holder, which realizes the lifting action of the tool head when retracting the tool through an inclined sliding sleeve and cam disk, thereby avoiding wear of the tool head during retraction.
[0006] This application provides a gear shaping power tool holder, which adopts the following technical solution:
[0007] A gear shaping power tool holder includes a housing and an input shaft rotatably connected to the housing. A slide is provided inside the housing, with the end of the slide for mounting a tool head. A sliding sleeve is slidably connected to the outside of the slide, and the sliding sleeve is slidably connected to the housing. The sliding trajectory of the sliding sleeve and the housing is inclined. A turntable and a cam disc are fixed to the input shaft. A drive wheel is eccentrically rotatably connected to the turntable. The slide has a drive groove for the drive wheel to move. Two limiting wheels are rotatably connected to the sliding sleeve, and the two limiting wheels are located on both sides of the cam disc and contact the cam disc.
[0008] By adopting the above technical solution, when the input shaft rotates, it drives the turntable, cam disc, and drive wheel to rotate. The drive wheel slides adaptively within the drive groove, causing the slide block to move back and forth. When the cam disc rotates, it drives the sliding sleeve to move left and right through the limit wheel. When the sliding sleeve slides relative to the housing, the inclined sliding trajectory causes the slide block and its cutter head to produce a small vertical displacement, thereby lifting the cutter head when retracting the cutter.
[0009] Optionally, a slanted slider is fixed to the inner wall of the housing, and a slanted guide rail is fixed to the outer wall of the sliding sleeve, with the slanted slider slidably connected to the slanted guide rail.
[0010] By adopting the above technical solution, the oblique sliding connection between the sliding sleeve and the housing is achieved through the cooperation of the oblique slider and the oblique guide rail.
[0011] Optionally, a smooth block is fixed to the outer wall of the slide block, and a flat guide rail is fixed to the inner wall of the slide sleeve, with the smooth block and the flat guide rail slidably connected.
[0012] By adopting the above technical solution, a straight sliding connection between the slide block and the slide sleeve can be achieved through the cooperation of the smooth block and the flat guide rail.
[0013] Optionally, the top surface of the cam disk is provided with a groove for the turntable to be embedded, and the central shaft of the drive wheel passes through the turntable and the cam disk and is locked by two nuts.
[0014] By adopting the above technical solution, the installation of the turntable, cam disc, and drive wheel is completed. The structure is compact, and the two nuts provide an anti-loosening effect.
[0015] Optionally, the central shaft of the limiting wheel passes through the sliding sleeve and is locked by the second nut. The outer wall of the sliding seat is provided with a relief groove for the second nut to slide in, and the second nut cannot rotate in the relief groove.
[0016] By adopting the above technical solution and designing a narrower clearance groove, the nut is prevented from rotating twice after assembly, thus achieving an anti-loosening effect.
[0017] Optionally, the outer diameter of the cam disk passing through its center of rotation is equal everywhere.
[0018] By adopting the above technical solution, it is ensured that the two limit wheels are always in contact with the cam disk when the cam disk rotates, thus limiting the degree of freedom of the limit wheels and preventing the sliding sleeve from shaking due to excessive freedom.
[0019] Optionally, when the drive wheel is located on the far right, the large and small ends of the cam disk are arranged in the front-to-back direction.
[0020] By adopting the above technical solution, the angular position of the cam disk is adapted to the position of the drive wheel, so as to realize the action of pressing down the tool head when the tool feed starts and raising the tool head when the tool retraction starts.
[0021] Optionally, the outer end of the housing is fixed with a mounting ring for the slide to pass through, and the inner wall of the mounting ring is fixed with a rubber sealing ring.
[0022] By adopting the above technical solution, the sealing ring achieves a sealing effect, preventing substances such as coolant, metal shavings, and lubricating oil from entering or leaving the housing through the sliding gap.
[0023] Optionally, the inner wall of the sealing ring is integrally formed with a flexible ring, the flexible ring being conical, and the flexible ring contacting the outer wall of the slide.
[0024] By adopting the above technical solution, and through the conical structure and easily deformable nature of the flexible ring, a reliable seal can be achieved even when the tool holder moves slightly up and down relative to the housing.
[0025] In summary, this application includes at least one of the following beneficial technical effects:
[0026] 1. The lifting action of the cutter head during retraction is achieved by tilting and sliding the sleeve and cam plate, thus avoiding wear on the cutter head during retraction;
[0027] 2. It is compatible with two working scenarios where the blade head is installed with the blade facing upwards or downwards. It can be adapted by switching the rotation direction of the input shaft, which has good versatility.
[0028] 3. Improve sealing performance through the design of flexible rings. Attached Figure Description
[0029] Figure 1 This is a front sectional view of a gear-shaping power tool holder according to an embodiment;
[0030] Figure 2 This is a partial exploded view of an embodiment;
[0031] Figure 3 yes Figure 1 AA section view;
[0032] Figure 4 yes Figure 1 BB section view;
[0033] Figure 5 yes Figure 1 Enlarged view of point C;
[0034] Figure 6 This is a schematic diagram of the cutter head trajectory in two states of the embodiment.
[0035] Explanation of reference numerals in the attached drawings: 1. Housing; 2. Input shaft; 3. Slide; 4. Cutting head; 5. Sliding sleeve; 11. Inclined slider; 51. Inclined guide rail; 31. Smooth block; 52. Flat guide rail; 21. Turntable; 22. Cam plate; 23. Drive wheel; 32. Drive groove; 24. Nut one; 53. Limit wheel; 54. Nut two; 33. Clearance groove; 12. Mounting ring; 6. Sealing ring; 61. Flexible ring. Detailed Implementation
[0036] The present application will be further described in detail below with reference to the accompanying drawings.
[0037] Reference Figure 1 This embodiment discloses a gear shaping power tool holder, including a housing 1 and an input shaft 2 rotatably connected to the housing 1. A slide 3 is provided inside the housing 1, and the end of the slide 3 is used to install a tool head 4. A sliding sleeve 5 is slidably connected to the outside of the slide 3, and the sliding sleeve 5 is slidably connected to the housing 1.
[0038] Reference Figure 2 and Figure 3 The sliding path of the sliding sleeve 5 and the housing 1 is inclined. Specifically, an inclined slider 11 is fixed to the inner wall of the housing 1, and an inclined guide rail 51 is fixed to the outer wall of the sliding sleeve 5. The inclined slider 11 and the inclined guide rail 51 are slidably connected. A smooth block 31 is fixed to the outer wall of the slide block 3, and a flat guide rail 52 is fixed to the inner wall of the sliding sleeve 5. The smooth block 31 and the flat guide rail 52 are slidably connected. When the sliding sleeve 5 slides relative to the housing 1, the inclined sliding path causes the slide block 3 and its cutting head 4 to produce a small vertical displacement. When the slide block 3 slides relative to the sliding sleeve 5, the sliding direction of the slide block 3 is consistent with the axial direction of the cutting head 4, performing a reciprocating motion of infeed and retraction.
[0039] Reference Figure 1 and Figure 3 The input shaft 2 is fixed with a turntable 21 and a cam disc 22. A drive wheel 23 is eccentrically rotatably connected to the turntable 21. The slide 3 is provided with a drive groove 32 for the drive wheel 23 to move. The length direction of the drive groove 32 is along the front-back direction. The inner wall of the sliding sleeve 5 is provided with an arc-shaped groove to avoid the drive wheel 23. When the input shaft 2 rotates, it drives the turntable 21 and the drive wheel 23 to rotate. The drive wheel 23 slides adaptively in the drive groove 32, driving the slide 3 to move back and forth.
[0040] The top surface of the cam disk 22 has a groove for the turntable 21 to be embedded, with a compact design to reduce the thickness it occupies. The central shaft of the drive wheel 23 passes through the turntable 21 and the cam disk 22 and is secured by two nuts 24, which are threaded to the end of the central shaft of the drive wheel 23. This structure completes the installation of the turntable 21, the cam disk 22, and the drive wheel 23. The structure is compact, and the two nuts 24 provide an anti-loosening effect.
[0041] Reference Figure 1 and Figure 4The sliding sleeve 5 is rotatably connected to two limiting wheels 53, which are located on both sides of the cam disk 22 and in contact with it. The outer diameter of the cam disk 22 passing through its center of rotation is equal everywhere, which ensures that the two limiting wheels 53 are always in contact with the cam disk 22 when it rotates, thus restricting the degree of freedom of the limiting wheels 53. The limiting wheels 53 drive the sliding sleeve 5 to move left and right, so that the position of the cam disk 22 corresponds perfectly with the position of the sliding sleeve 5, and the sliding sleeve 5 will not wobble due to excessive freedom.
[0042] Reference Figure 3 and Figure 4 It should be noted that when the drive wheel 23 is located on the far right, the large and small ends of the cam disk 22 are arranged in the front-to-back direction. The cam disk 22 is designed such that, along the circumference of the cam disk 22, the large and small ends each have a large-angle, constant-radius section, while the variable-diameter section occupies a smaller angle. With this design, when the cam disk 22 drives the drive wheel 23 to move, the variable-diameter section quickly displaces the drive wheel 23 (the sliding sleeve 5 moves, corresponding to the upward or downward movement of the cutter head 4), and then keeps the position of the drive wheel 23 unchanged over a longer stroke (the sliding sleeve 5 does not move, corresponding to the left or right movement of the cutter head 4).
[0043] Reference Figure 1 The central shaft of the limiting wheel 53 passes through the sliding sleeve 5 and is locked by the second nut 54. The second nut 54 is threadedly connected to the end of the central shaft of the limiting wheel 53. The outer wall of the slide block 3 is provided with a relief groove 33 for the second nut 54 to slide. The second nut 54 cannot rotate in the relief groove 33. The narrow relief groove 33 is designed to prevent the second nut 54 from rotating after assembly, thus achieving an anti-loosening effect.
[0044] Reference Figure 1 and Figure 5 A mounting ring 12 for the slide 3 to pass through is fixed to the outer end of the housing 1. A rubber sealing ring 6 is fixed to the inner wall of the mounting ring 12. A flexible ring 61 is integrally formed on the inner wall of the sealing ring 6. The flexible ring 61 is conical and contacts the outer wall of the slide 3. Through the sealing ring 6 and the flexible ring 61, a sealing structure is formed between the mounting ring 12 and the slide 3, preventing coolant, metal shavings, lubricating oil, and other substances from entering or leaving the housing 1. Due to the conical structure and easily deformable nature of the flexible ring 61, a reliable seal can be achieved even when the tool holder moves slightly up and down relative to the housing 1.
[0045] The implementation principle of a gear-shaping power tool holder according to an embodiment of this application is as follows:
[0046] Reference Figure 6Taking the perspective and initial position shown in the diagram (drive wheel 23 is on the far right) as an example, if input shaft 2 rotates counterclockwise, slide 3 moves to the left to feed. At this time, cam disk 22 drives slide sleeve 5 to move to the right through limit wheel 53. Since the movement trajectory of slide sleeve 5 is inclined, slide sleeve 5 produces a small downward displacement, corresponding to the tool head 4 moving downward towards the workpiece. Then, tool head 4 completes the feed stroke. During retraction, cam disk 22 drives slide sleeve 5 to move to the left through limit wheel 53, causing slide sleeve 5 to produce a small upward displacement, corresponding to the tool head 4 moving upward away from the workpiece. Then, tool head 4 completes the retraction stroke, and the cycle repeats. The movement trajectory of tool head 4 is similar to a parallelogram. It should be noted that in this working state, the cutting edge of tool head 4 should be at its bottom to complete the correct machining action.
[0047] Taking the perspective and initial position shown in the diagram (drive wheel 23 is on the far right) as an example, if input shaft 2 rotates clockwise, slide 3 moves to the left to feed. At this time, cam disk 22 drives slide sleeve 5 to move to the left through limit wheel 53. Since the movement trajectory of slide sleeve 5 is inclined, slide sleeve 5 produces a small upward displacement, corresponding to the tool head 4 moving upward towards the workpiece. Then, tool head 4 completes the feed stroke. During retraction, cam disk 22 drives slide sleeve 5 to move to the right through limit wheel 53, causing slide sleeve 5 to produce a small downward displacement, corresponding to the tool head 4 moving downward away from the workpiece. Then, tool head 4 completes the retraction stroke, and the cycle repeats. The movement trajectory of tool head 4 is similar to a parallelogram. It should be noted that in this working state, the cutting edge of tool head 4 should be at its top to complete the correct machining action.
[0048] In summary, this gear hobbing power tool holder achieves the lifting action of the tool head 4 during tool retraction through the tilting and sliding sleeve 5 and cam disk 22, thus avoiding wear on the tool head 4 during retraction. It is also adaptable to both upward and downward mounting scenarios for the tool head 4, which can be adapted by switching the rotation direction of the input shaft 2, demonstrating good versatility.
[0049] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.
Claims
1. A gear-shaping power tool holder, comprising a housing (1) and an input shaft (2) rotatably connected to the housing (1), wherein a slide (3) is provided inside the housing (1), and the end of the slide (3) is used to mount a tool head (4), characterized in that: The slide block (3) is slidably connected to a slide sleeve (5), which is slidably connected to the housing (1). The sliding trajectory of the slide sleeve (5) and the housing (1) is inclined. The input shaft (2) is fixed with a turntable (21) and a cam disk (22). The turntable (21) is eccentrically connected to a drive wheel (23). The slide block (3) is provided with a drive groove (32) for the drive wheel (23) to move. The slide sleeve (5) is rotatably connected to two limit wheels (53). The two limit wheels (53) are located on both sides of the cam disk (22) and are in contact with the cam disk (22).
2. The gear-shaping power tool holder according to claim 1, characterized in that: The inner wall of the housing (1) is fixed with a slanted slider (11), and the outer wall of the sliding sleeve (5) is fixed with a slanted guide rail (51). The slanted slider (11) is slidably connected to the slanted guide rail (51).
3. The gear-shaping power tool holder according to claim 1, characterized in that: The outer wall of the slide block (3) is fixed with a smooth block (31), and the inner wall of the slide sleeve (5) is fixed with a flat guide rail (52). The smooth block (31) and the flat guide rail (52) are slidably connected.
4. The gear-shaping power tool holder according to claim 1, characterized in that: The top surface of the cam disk (22) is provided with a groove for the turntable (21) to be embedded in. The central shaft of the drive wheel (23) passes through the turntable (21) and the cam disk (22) and is then locked by two nuts (24).
5. A gear-shaping power tool holder according to claim 1, characterized in that: The central shaft of the limiting wheel (53) passes through the sliding sleeve (5) and is locked by the second nut (54). The outer wall of the sliding block (3) is provided with a relief groove (33) for the second nut (54) to slide. The second nut (54) cannot rotate in the relief groove (33).
6. A gear-shaping power tool holder according to claim 1, characterized in that: The outer diameter of the cam disk (22) passing through its center of rotation is equal everywhere.
7. A gear-shaping power tool holder according to claim 1, characterized in that: When the drive wheel (23) is located on the far right, the large and small ends of the cam disk (22) are arranged in the front-to-back direction.
8. A gear-shaping power tool holder according to claim 1, characterized in that: The outer end of the housing (1) is fixed with an installation ring (12) through which the slide (3) passes, and the inner wall of the installation ring (12) is fixed with a rubber sealing ring (6).
9. A gear-shaping power tool holder according to claim 8, characterized in that: The inner wall of the sealing ring (6) is integrally formed with a flexible ring (61), which is conical and contacts the outer wall of the slide (3).