Automatic nailing device for racket bottom support

Abstract

The invention relates to the technical field related to racket processing, in particular to an automatic nailing device for a racket collet, which comprises a base, a mounting seat, a first-stage telescopic electric cylinder, a workpiece positioning shaft and a nailing device, a rotating hole is formed in the mounting seat, a first-stage bracket is fixedly mounted on the upper end surface of the mounting seat, the first-stage telescopic electric cylinder is fixed on the first-stage bracket, and a second-stage telescopic electric cylinder is fixed on the second-stage bracket; a mounting plate is fixedly mounted on a telescopic part of the first-stage telescopic electric cylinder, a workpiece positioning shaft is rotationally mounted in a rotating hole through a front bearing and a rear bearing, a workpiece groove is formed in the workpiece positioning shaft, and a racket handle to be machined is placed in the workpiece groove; according to the automatic nailing device for the racket bottom support, the automatic nailing device for the racket bottom support is formed by combining a base, a mounting seat, a first-stage telescopic electric cylinder, a workpiece positioning shaft and a nailing device, and the workpiece positioning shaft is rotationally mounted on the mounting seat through a front bearing and a rear bearing; therefore, a worker can conveniently position and connect the racket handle on the workpiece positioning shaft and each side face of the racket bottom support.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of racket processing, in particular to a racket bottom support automatic nailing device. BACKGROUND

[0002] The racket bottom support, also known as a bottom cover, is a component installed at the end of a racket handle, which is applied in different types of rackets, such as tennis rackets, badminton rackets, table tennis rackets, etc. The existing patent file with the announcement number CN223475313U discloses a racket processing equipment, which comprises a support leg, a rotating clamping assembly, a first motor, a lifting assembly, a moving base, a lifting device and a multi-head paint spraying part. The rotating clamping assembly is arranged on the inner side of the support leg, the first motor is installed on the outer side of the top of the support leg, the lifting assembly is arranged on one end of the support leg, the moving base is installed on one side of the lifting assembly, the lifting device is arranged on the top of the moving base, and the multi-head paint spraying part is arranged on one side of the lifting device. The rotating clamping assembly comprises a transmission base, a mounting bracket, a second motor, a rotating block, a mounting frame, a fixed plate, a first air cylinder and a clamping plate. The transmission base is rotationally connected to the inner side of the support leg, the mounting bracket is fixedly connected to the bottom of the transmission base, the second motor is arranged in the mounting bracket, the second motor is rotationally connected to the top of the transmission base, the mounting frame is fixedly connected to the top of the rotating block, the fixed plate is fixedly connected to the inside of the mounting frame, the first air cylinder is fixedly connected to the outside of the mounting frame, and the clamping plate is arranged in the mounting frame. The first air cylinder drives the clamping plate to move, and the fixed plate clamps the racket rod. The second motor can drive the rotating block to rotate, so that the racket rod can be turned over to facilitate the paint spraying work. However, the above-mentioned scheme has a relatively complex turning structure when processing each surface of the racket, which needs to be assisted by multiple driving structures, resulting in a relatively complex power structure of the turning structure. Therefore, the present application proposes a racket bottom support automatic nailing device to solve the above-mentioned problems. SUMMARY

[0003] The present application aims to provide a racket bottom support automatic nailing device to solve the problems raised in the background art.

[0004] To achieve the above-mentioned purpose, the present application provides the following technical scheme: a racket bottom support automatic nailing device, comprising: a base; a mounting seat, a rotating hole is formed in the mounting seat, and a first support is fixedly installed on the upper end face of the mounting seat; a first telescopic electric cylinder, the first telescopic electric cylinder is fixed on the first support, and an installation plate is fixedly installed on the telescopic part of the first telescopic electric cylinder; The workpiece positioning shaft is rotatably mounted in a rotating hole via a front bearing and a rear bearing. The workpiece positioning shaft has a workpiece groove, and the racket handle to be processed is placed in the workpiece groove. The cross-sections of the workpiece groove and the racket handle are matching regular octagons. A nailer is fixed to the lower surface of the mounting plate, and the racket base to be positioned is fixed to the end of the racket handle by the positioning nails driven out by the nailer.

[0005] Preferably, a transmission rack is fixedly installed on the lower surface of the mounting plate, an annular seat is fixedly connected to the outer ring of the front bearing, meshing teeth are integrally formed on the outer side wall of the annular seat, the transmission rack meshes with the meshing teeth, a force-bearing ring is fixedly installed on the workpiece positioning shaft, a force-bearing tooth groove is formed on the outer side wall of the force-bearing ring, both sides of the force-bearing tooth groove are inclined in a clockwise direction, a spring slot is formed on the side wall of the annular seat, and a limit spring is inserted into the spring slot.

[0006] Preferably, when the primary telescopic electric cylinder drives the transmission rack to press down during its forward stroke, the transmission rack cannot drive the workpiece positioning shaft to rotate. When the primary telescopic electric cylinder drives the transmission rack to move upward during its return stroke, the transmission rack drives the workpiece positioning shaft to rotate 90 degrees.

[0007] Preferably, a secondary bracket is fixedly installed on the base, and a secondary telescopic electric cylinder is fixedly installed on the secondary bracket. The end of the telescopic rod of the secondary telescopic electric cylinder is rotatably mounted with a top holding member through a third-stage bearing. After the secondary telescopic electric cylinder moves, the top holding member presses the racket base against the racket handle.

[0008] Preferably, a guide rod seat is fixedly installed on the rear side of the mounting base. The guide rod seat has a guide rod hole, and a guide rod is movably installed in the guide rod hole. A support spring is fixedly installed on the lower end of the guide rod, and a friction seat is fixedly installed on the upper end face of the guide rod. An anti-slip rubber layer is fixedly glued to the upper side of the friction seat. When the support spring is in the reset state, the anti-slip rubber layer abuts against the side wall of the workpiece positioning shaft. The frictional force between the anti-slip rubber layer and the workpiece positioning shaft is greater than the resistance of the force ring to the limiting spring when the transmission rack is pressed down.

[0009] Preferably, the outer wall of the limiting spring is integrally formed with a V-shaped support member, which abuts against the inner wall of the annular seat. Both the limiting spring and the V-shaped support member are cast from spring steel. A locking block groove is provided at the root of the spring groove, and a locking block is integrally formed at the root of the limiting spring. The locking block is fixed in the locking block groove by a positioning screw.

[0010] Preferably, the limiting spring is arranged in a circle around the annular seat, and the force-bearing groove is arranged in a circle around the force-bearing ring, and the number of force-bearing grooves is an integer multiple of the limiting spring.

[0011] Preferably, the workpiece positioning shaft is composed of a first shaft and a second shaft. The second shaft is positioned on the first shaft by fastening bolts. A clearance groove is provided at the bottom of the workpiece groove on both the first and second shafts. The clearance groove is frustum-shaped, and a primary guide groove is provided on both sides of the clearance groove. A secondary guide groove is provided on both sides of the workpiece groove. The primary and secondary guide grooves are arranged in an L-shape. The secondary guide groove is connected to the workpiece groove via a connecting groove. A primary force-bearing block is movably installed in the primary guide groove. A secondary force-bearing block is movably installed in the secondary guide groove. A clamping block is movably installed in the connecting groove. A force-bearing seat is movably installed in the workpiece groove. A force-bearing column is integrally formed on the inner side of the force-bearing seat, and a return spring is sleeved on the force-bearing column.

[0012] Preferably, the inner end of the force-bearing column is frustum-shaped, the two ends of the primary force-bearing block are respectively cut to form a primary wedge surface and a secondary wedge surface, the two ends of the secondary force-bearing block are respectively cut to form a tertiary wedge surface and a quaternary wedge surface, the inner end of the clamping block is cut to form a quinary wedge surface, the primary wedge surface of the primary force-bearing block is abutted against the inclined surface of the inner end of the force-bearing column, the secondary wedge surface of the primary force-bearing block is abutted against the tertiary wedge surface of the secondary force-bearing block, and the quaternary wedge surface of the secondary force-bearing block is abutted against the quinary wedge surface of the clamping block. When the force-bearing seat is pushed inward by force, the force-bearing column pushes the primary force-bearing block to both sides, thereby pushing the secondary force-bearing block, and then pushing the clamping block, thereby positioning the racket handle through the clamping blocks on both sides.

[0013] Preferably, the depth of the secondary guide groove is greater than the depth of the connecting groove, and the clamping block has integrally formed limit blocks on both sides. During actual installation, the end face of the limit block is abutted against the bottom surface of the secondary guide groove.

[0014] Compared with the prior art, the beneficial effects of the present invention are: 1. An automatic nailing device for racket base is set up, consisting of a base, mounting seat, first-stage telescopic electric cylinder, workpiece positioning shaft and nailer. The workpiece positioning shaft is rotatably mounted on the mounting seat through the front bearing and the rear bearing, which makes it convenient for workers to position and connect the racket handle and racket base on the workpiece positioning shaft. 2. By setting a transmission rack on the lower surface of the mounting plate, setting an annular seat on the outer ring of the front bearing, setting meshing teeth on the outer side wall of the annular seat, setting a force ring on the workpiece positioning shaft, opening a force groove on the outer side wall of the force ring, and connecting a limiting spring on the side wall of the annular seat, it is convenient to drive the racket handle and racket base on the workpiece positioning shaft to change direction synchronously by the driving force of the nailer during the upward movement, thereby facilitating nailing on each side of the racket handle and racket base; 3. By fixing a guide rod seat to the rear side of the mounting base, and movably installing a guide rod in the guide rod hole of the guide rod seat, and fixing a support spring to the lower end of the guide rod, a friction seat is provided on the upper end face of the guide rod, and an adhesive anti-slip rubber layer is fixedly bonded to the upper side of the friction seat. Thus, through the supporting force of the support spring, the anti-slip rubber layer on the friction seat abuts against the workpiece positioning shaft, thereby subjecting the workpiece positioning shaft to a certain amount of frictional force, thus preventing the workpiece positioning shaft from shifting position during the nailing process. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a half-sectional view of the present invention; Figure 3 for Figure 2 Enlarged schematic diagram of the structure at point A in the middle; Figure 4 for Figure 2 Enlarged schematic diagram of the structure at point B; Figure 5 for Figure 2 Enlarged schematic diagram of the structure at point C; Figure 6 for Figure 2 Enlarged schematic diagram of the structure at point D; Figure 7 This is a schematic diagram of the mounting base structure of the present invention; Figure 8 for Figure 7 Enlarged schematic diagram of the structure at point E in the middle; Figure 9 for Figure 8 Enlarged schematic diagram of the structure at point F; Figure 10 This is a schematic diagram of the workpiece positioning shaft structure of the present invention; Figure 11 This is a schematic diagram of the first shaft structure of the present invention; Figure 12 for Figure 11 Enlarged schematic diagram of the structure at point G in the middle; Figure 13 for Figure 11 Enlarged schematic diagram of the structure at point H; Figure 14This is a schematic diagram of the limiting spring structure of the present invention; Figure 15 This is a schematic diagram of the racket handle of the present invention; Figure 16 for Figure 15 Enlarged schematic diagram of the structure at point L.

[0016] In the diagram: 1. Base; 2. Mounting seat; 3. First-stage telescopic electric cylinder; 4. Workpiece positioning shaft; 5. Nail driver; 6. First-stage bracket; 7. Rotary hole; 8. Front bearing; 9. Rear bearing; 10. Mounting plate; 11. Transmission rack; 12. Ring seat; 13. Meshing teeth; 14. Force-bearing ring; 15. Force-bearing tooth groove; 16. Spring slot; 17. Limiting spring; 18. V-shaped support; 19. Locking block slot; 20. Locking block; 21. Positioning screw; 22. Racket handle; 23. Racket base; 24. Positioning pin; 25. Guide rod seat. 26. Guide rod 27. Support spring 28. Friction seat 29. Anti-slip rubber layer 30. Secondary bracket 31. Secondary telescopic electric cylinder 32. Telescopic rod 33. Tertiary bearing 34. Top support 35. First shaft 36. Second shaft 37. Clear groove 38. Primary guide groove 39. Secondary guide groove 40. Connecting groove 41. Force seat 42. Force column 43. Return spring 44. Primary force block 45. Secondary force block 46. Clamping block 47. Limiting block 50. Workpiece groove Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] Please see Figures 1-16 The present invention provides the following five preferred embodiments: Example 1: An automatic nail-driving device for racket bases includes a base 1, a mounting seat 2, a primary telescopic electric cylinder 3, a workpiece positioning shaft 4, and a nail-driving device 5. The mounting seat 2 has a rotating hole 7, and a primary support 6 is fixedly mounted on the upper surface of the mounting seat 2. The primary telescopic electric cylinder 3 is fixed on the primary support 6, and a mounting plate 10 is fixedly mounted on the telescopic part of the primary telescopic electric cylinder 3. The workpiece positioning shaft 4 is rotatably mounted in the rotating hole 7 via a front bearing 8 and a rear bearing 9. The workpiece positioning shaft 4 has a workpiece groove 50, and the racket handle 22 to be processed is placed in the workpiece groove 50. The racket handle 22 has a matching regular octagonal cross section. The nailer 5 is fixed to the lower surface of the mounting plate 10, and the racket base 23 to be positioned is fixed to the end of the racket handle 22 by the positioning nail 24 driven by the nailer 5. By setting an automatic nailing device for the racket base composed of a base 1, a mounting seat 2, a first-stage telescopic electric cylinder 3, a workpiece positioning shaft 4 and a nailer 5, and rotatably mounting the workpiece positioning shaft 4 on the mounting seat 2 through the front bearing 8 and the rear bearing 9, it is convenient for the staff to position and connect the racket handle 22 and the racket base 23 on the workpiece positioning shaft 4.

[0019] A transmission rack 11 is fixedly mounted on the lower surface of the mounting plate 10. An annular seat 12 is fixedly connected to the outer ring of the front bearing 8. Engaging teeth 13 are integrally formed on the outer wall of the annular seat 12. The transmission rack 11 meshes with the engaging teeth 13. A force-bearing ring 14 is fixedly mounted on the workpiece positioning shaft 4. A force-bearing groove 15 is formed on the outer wall of the force-bearing ring 14. Both sides of the force-bearing groove 15 are inclined in a clockwise direction. A spring slot 16 is formed on the side wall of the annular seat 12. A limit spring 17 is inserted into the spring slot 16. When the first-stage telescopic electric cylinder 3 pushes the transmission rack 11 down during its movement, the transmission rack 11 cannot drive the workpiece positioning shaft 4 to rotate, and the first-stage telescopic electric cylinder 3 returns to its original position. When the transmission rack 11 moves upward during the process, the transmission rack 11 drives the workpiece positioning shaft 4 to rotate 90 degrees. By setting the transmission rack 11 on the lower surface of the mounting plate 10, setting an annular seat 12 on the outer ring of the front bearing 8, setting meshing teeth 13 on the outer side wall of the annular seat 12, setting a force ring 14 on the workpiece positioning shaft 4, opening a force groove 15 on the outer side wall of the force ring 14, and connecting a limiting spring 17 on the side wall of the annular seat 12, it is convenient to drive the racket handle 22 and racket base 23 on the workpiece positioning shaft 4 to change direction synchronously by the driving force of the nailer 5 during the upward movement, so as to facilitate nailing on each side of the racket handle 22 and racket base 23.

[0020] Example 2: Please refer to Figures 1-2 and Figure 6Based on Embodiment 1, a secondary support 30 is fixedly installed on the base 1, and a secondary telescopic electric cylinder 31 is fixedly installed on the secondary support 30. The end of the telescopic rod 32 of the secondary telescopic electric cylinder 31 is rotatably mounted with a top holding member 34 through a third-stage bearing 33. After the secondary telescopic electric cylinder 31 moves, the top holding member 34 presses the racket base 23 against the racket handle 22.

[0021] Example 3: Please refer to Figures 2-5 Based on Embodiment 2, a guide rod seat 25 is fixedly installed on the rear side of the mounting base 2. A guide rod hole is provided on the guide rod seat 25, and a guide rod 26 is movably installed in the guide rod hole. A support spring 27 is fixedly installed on the lower end of the guide rod 26, and a friction seat 28 is fixedly installed on the upper end face of the guide rod 26. An anti-slip rubber layer 29 is fixedly glued to the upper side of the friction seat 28. When the support spring 27 is in the reset state, the anti-slip rubber layer 29 abuts against the side wall of the workpiece positioning shaft 4. The frictional force between the anti-slip rubber layer 29 and the workpiece positioning shaft 4 is greater than the force ring 14 exerting a force on the limiting spring when the transmission rack 11 is pressed down. The movement resistance of the piece 17 is mitigated by fixing a guide rod seat 25 to the rear side of the mounting base 2, movably installing a guide rod 26 in the guide rod hole of the guide rod seat 25, fixing a support spring 27 to the lower end of the guide rod 26, setting a friction seat 28 on the upper end face of the guide rod 26, and fixing an adhesive anti-slip rubber layer 29 to the upper side of the friction seat 28. Thus, through the supporting force of the support spring 27, the anti-slip rubber layer 29 on the friction seat 28 abuts against the workpiece positioning shaft 4, thereby subjecting the workpiece positioning shaft 4 to a certain amount of frictional force, thus preventing the workpiece positioning shaft 4 from shifting position during the nailing process.

[0022] Example 4: Please refer to Figures 7-9 and Figure 14 Based on Embodiment 3, a V-shaped support 18 is integrally formed on the outer wall of the limiting spring 17. The V-shaped support 18 abuts against the inner wall of the annular seat 12. Both the limiting spring 17 and the V-shaped support 18 are cast from spring steel. A locking groove 19 is provided at the root of the spring groove 16. A locking block 20 is integrally formed at the root of the limiting spring 17. The locking block 20 is fixed in the locking groove 19 by a positioning screw 21. By setting the V-shaped support 18, the locking stability of the end of the limiting spring 17 in the force-bearing tooth groove 15 can be improved when the first-stage telescopic electric cylinder 3 moves.

[0023] The limiting spring 17 is arranged in a circle around the annular seat 12, and the force-bearing tooth groove 15 is arranged in a circle around the force-bearing ring 14, and the number of force-bearing tooth grooves 15 is an integer multiple of the number of limiting springs 17.

[0024] Example 5: Please refer to Figures 10-13The workpiece positioning shaft 4 is composed of a first shaft body 35 and a second shaft body 36. The second shaft body 36 is positioned on the first shaft body 35 by fastening bolts. The bottom of the workpiece groove 50 on the first shaft body 35 and the second shaft body 36 is provided with a clearance groove 37. The clearance groove 37 is frustum-shaped, and a primary guide groove 38 is provided on both sides of the clearance groove 37. A secondary guide groove 39 is provided on both sides of the workpiece groove 50. The primary guide groove 38 and the secondary guide groove 39 are arranged in an L-shape. The secondary guide groove 39 is connected to the workpiece groove 50 through a connecting groove 40. A primary force-bearing block 44 is movably installed in the primary guide groove 38. A secondary force-bearing block 45 is movably installed in the secondary guide groove 39. A clamping block 46 is movably installed in the connecting groove 40. A force-bearing seat 41 is movably installed in the workpiece groove 50. A force-bearing column 42 is integrally formed on the inner side of the force-bearing seat 41. A return spring 43 is sleeved on the force-bearing column 42.

[0025] The inner end of the force-bearing column 42 is frustum-shaped. The two ends of the primary force-bearing block 44 are respectively cut to form a primary wedge surface and a secondary wedge surface. The two ends of the secondary force-bearing block 45 are respectively cut to form a tertiary wedge surface and a quaternary wedge surface. The inner end of the clamping block 46 is cut to form a quinary wedge surface. The primary wedge surface of the primary force-bearing block 44 abuts against the inclined surface of the inner end of the force-bearing column 42. The secondary wedge surface of the primary force-bearing block 44 abuts against the tertiary wedge surface of the secondary force-bearing block 45. The quaternary wedge surface of the secondary force-bearing block 45 abuts against the quinary wedge surface of the clamping block 46. When the force-bearing seat 41 is pushed inward under force... The force-bearing column 42 pushes the primary force-bearing block 44 to both sides, thereby pushing the secondary force-bearing block 45, and then pushing the clamping block 46. Thus, the clamping blocks 46 on both sides form a positioning effect on the racket handle 22. Through the advancing force of the secondary telescopic electric cylinder 31, the top holding member 34 pushes the racket handle 22. Thus, the force-bearing column 42 drives the primary force-bearing block 44, the secondary force-bearing block 45, and the clamping block 46, so that the clamping block 46 forms a clamping force on the side of the racket handle 22, so as to avoid the assembly gap between the racket handle 22 and the workpiece groove 50, which would affect the assembly stability of the racket handle 22.

[0026] The depth of the secondary guide groove 39 is greater than the depth of the connecting groove 40. The clamping block 46 has integrally formed limit blocks 47 on both sides. When the clamping block 46 is actually installed, the end face of the limit block 47 is set to abut against the bottom surface of the secondary guide groove 39.

[0027] Although the illustrative specific embodiments of this application have been described above to enable those skilled in the art to understand this application, this application is not limited to the scope of the specific embodiments. For those skilled in the art, all applications utilizing the concept of this application are protected as long as various variations are within the spirit and scope of this application as defined and determined by the appended claims.

Claims

1. A device for automatic nailing of a racket bottom support, characterized in that: Include: Base (1); Mounting seat (2), the mounting seat (2) is provided with a rotating hole (7), and the upper end surface of the mounting seat (2) is fixedly provided with a first support (6); The first telescopic electric cylinder (3) is fixed on the first support (6), and the telescopic part of the first telescopic electric cylinder (3) is fixedly provided with a mounting plate (10); The workpiece positioning shaft (4) is rotatably installed in the rotating hole (7) through the front bearing (8) and the rear bearing (9), the workpiece positioning shaft (4) is provided with a workpiece groove (50), and the racket handle (22) to be processed is placed in the workpiece groove (50), the cross section of the workpiece groove (50) and the racket handle (22) is a matching regular octagon; The nailer (5) is fixed on the lower surface of the mounting plate (10), and the racket bottom support (23) to be positioned is fixed on the end of the racket handle (22) through the positioning nail (24) punched by the nailer (5).

2. A device for automatic nailing of a racket bottom support according to claim 1, characterized in that: The lower surface of the mounting plate (10) is fixedly provided with a transmission rack (11), the bearing outer ring of the front bearing (8) is fixedly connected with an annular seat (12), the outer side wall of the annular seat (12) is integrally formed with a meshing tooth (13), the transmission rack (11) is arranged in meshing with the meshing tooth (13), the workpiece positioning shaft (4) is fixedly provided with a stress ring (14), the outer side wall of the stress ring (14) is provided with a stress tooth groove (15), the two side edges of the stress tooth groove (15) are both arranged in an inclined manner towards the clockwise direction, the side wall of the annular seat (12) is provided with a spring piece groove (16), and the spring piece groove (16) is inserted and connected with a limiting spring piece (17).

3. A device for automatic nailing of a racket bottom support according to claim 2, characterized in that: When the first telescopic electric cylinder (3) drives the transmission rack (11) to move downward, the transmission rack (11) cannot drive the workpiece positioning shaft (4) to rotate, when the first telescopic electric cylinder (3) drives the transmission rack (11) to move upward, the transmission rack (11) drives the workpiece positioning shaft (4) to rotate by ninety degrees.

4. A device for automatic nailing of a racket bottom support according to claim 3, characterized in that: The base (1) is fixedly provided with a second support (30), the second support (30) is fixedly provided with a second telescopic electric cylinder (31), the telescopic rod (32) end of the second telescopic electric cylinder (31) is rotatably provided with a top holding piece (34) through a third bearing (33), after the second telescopic electric cylinder (31) moves, the top holding piece (34) abuts the racket bottom support (23) on the racket handle (22).

5. A device for automatic nailing of a racket bottom support according to claim 3, characterized in that: The rear side of the mounting base (2) is fixedly provided with a guide rod base (25), a guide rod hole is formed in the guide rod base (25), a guide rod (26) is movably arranged in the guide rod hole, a supporting spring (27) is fixedly arranged at the lower end of the guide rod (26), a friction base (28) is fixedly arranged at the upper end of the guide rod (26), an antiskid rubber layer (29) is fixedly glued to the upper side of the friction base (28), when the supporting spring (27) is in the reset state, the antiskid rubber layer (29) is arranged in abutment with the side wall of the workpiece positioning shaft (4), and the friction force between the antiskid rubber layer (29) and the workpiece positioning shaft (4) is greater than the movement resistance of the stress ring (14) to the limiting elastic sheet (17) when the transmission rack (11) is pressed down.

6. A ball bat bottom support automatic nailing device according to claim 3, characterized in that: A V-shaped supporting piece (18) is integrally formed on the outer side wall of the limiting elastic sheet (17), the V-shaped supporting piece (18) is arranged in abutment with the inner side wall of the annular base (12), the limiting elastic sheet (17) and the V-shaped supporting piece (18) are both made of spring steel, a clamping block groove (19) is formed at the root of the elastic sheet groove (16), a clamping block (20) is integrally formed at the root of the limiting elastic sheet (17), and the clamping block (20) is fixed in the clamping block groove (19) through a positioning screw (21).

7. A device for automatic nailing of a racket bottom support according to claim 3, characterized in that: The limiting elastic sheet (17) is arranged in a circle around the annular base (12), the stress tooth groove (15) is formed in a circle around the stress ring (14), and the number of the stress tooth grooves (15) is an integer multiple of the number of the limiting elastic sheets (17).

8. A device for automatic nailing of a racket bottom support according to claim 4, characterized in that: The workpiece positioning shaft (4) is composed of a first shaft body (35) and a second shaft body (36), the second shaft body (36) is positioned on the first shaft body (35) through a fastening bolt, an emptying groove (37) is formed at the bottom of the workpiece groove (50) on the first shaft body (35) and the second shaft body (36), the emptying groove (37) is in the shape of a circular truncated cone, a first-level guide groove (38) is formed at the two sides of the emptying groove (37), a second-level guide groove (39) is formed at the two sides of the workpiece groove (50), the first-level guide groove (38) and the second-level guide groove (39) are arranged in the shape of an L, the second-level guide groove (39) is in communication with the workpiece groove (50) through a connecting groove (40), a first-level stress block (44) is movably arranged in the first-level guide groove (38), a second-level stress block (45) is movably arranged in the second-level guide groove (39), and a clamping block (46) is movably arranged in the connecting groove (40).

9. A device for automatic nailing of a racket bottom support according to claim 5, characterized in that: The inner end of the force column (42) is in the shape of a circular truncated cone, two ends of the first force block (44) are respectively cut to form a first wedge surface and a second wedge surface, two ends of the second force block (45) are respectively cut to form a third wedge surface and a fourth wedge surface, and the inner end of the clamping block (46) is cut to form a fifth wedge surface, the first wedge surface of the first force block (44) is arranged in close contact with the inner end inclined surface of the force column (42), the second wedge surface of the first force block (44) is arranged in close contact with the third wedge surface of the second force block (45), and the fourth wedge surface of the second force block (45) is arranged in close contact with the fifth wedge surface of the clamping block (46), when the force seat (41) is pushed, the force column (42) pushes the first force block (44) to both sides, thereby pushing the second force block (45) and then pushing the clamping block (46), so that the clamping block (46) on both sides forms a positioning effect on the racket handle (22).

10. A device for automatic nailing of a racket bottom support according to claim 5, characterized in that: The depth value of the second guide groove (39) is greater than that of the connecting groove (40), and the clamping block (46) is integrally formed with a limiting block (47) on both sides, and the end face of the limiting block (47) is arranged in close contact with the bottom surface of the second guide groove (39) during actual installation.

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