A heavy-duty electric hammer trip device

Abstract

The utility model relates to electric tool technical field, and disclose a heavy electric hammer tripping device, including transmission main shaft, the transmission main shaft is equipped with the rotary connection ring, the rotary connection ring is evenly provided with a plurality of limit holes, the limit hole all is provided with the ball bearing, the bottom of transmission main shaft is equipped with transmission gear disc, the utility model discloses the rotary connection ring and transmission gear disc are provided on transmission main shaft, wherein the rotary connection ring is evenly provided with a plurality of ball bearings, ball bearing is under the resilience of first reset spring and second reset spring, through the top resistance ring to ball bearing resistance limit, so that ball bearing is driven again when receiving greater, can be separated from rotary limit groove, reset through resilience, thereby effectively drive transmission gear disc rotation, avoid ball bearing from rotary limit groove and separate after difficultly restore to original working state, guarantee the drilling function of electric hammer continues effectively, more convenient for the use of user.

Description

Technical Field

[0001] This utility model relates to the field of power tool technology, specifically to a heavy-duty electric hammer release device. Background Technology

[0002] Heavy-duty electric hammers are widely used as key tools in fields such as construction and decoration. They are mainly used to drill holes in hard materials such as concrete, floor slabs, brick walls and stone. Due to the complex and ever-changing working environment, heavy-duty electric hammers face many challenges when working, which makes the tripping device an important part of ensuring their safe and efficient operation.

[0003] The existing heavy-duty electric hammer release devices also have various problems. For example, some traditional electric hammers use a friction plate release structure. In actual use, this structure has poor consistency, the release torque is difficult to guarantee accurately, and the overall reliability is poor. After a release, it is difficult to return to the original working state, which often leads to device failure and causes the electric hammer to lose its basic drilling function, causing great inconvenience to users. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a heavy-duty electric hammer release device, which solves various problems that exist in existing heavy-duty electric hammer release devices. For example, some traditional electric hammers use a friction plate release structure. In actual use, this structure has poor consistency, the release torque is difficult to guarantee accurately, and the overall reliability is poor. After a release, it is difficult to return to the original working state, often leading to device failure and causing the electric hammer to lose its basic drilling function, which brings great inconvenience to users.

[0005] This utility model provides the following technical solution: a heavy-duty electric hammer release device, including a transmission main shaft, a rotating connecting ring sleeved on the transmission main shaft, and a plurality of limiting holes evenly opened on the rotating connecting ring;

[0006] Each of the limiting holes is equipped with a ball bearing. A transmission gear plate is fitted at the bottom of the transmission spindle. An installation slot is opened at the center of the top of the transmission gear plate. Several rotation limiting grooves are evenly opened on the bottom wall of the installation slot. The rotation connecting ring is inserted into the installation slot. A bottom collar is fitted at the bottom end of the transmission spindle. A top abutment ring is also fitted on the transmission spindle.

[0007] Preferred technical solution 1: The top contact ring is located at the top of the rotating connecting ring, and a first return spring is sleeved on the top end of the transmission main shaft.

[0008] Preferred technical solution 2: A second return spring is sleeved on the outer side of the first return spring, and a top closing ring is provided at the top end of the transmission main shaft.

[0009] Preferred technical solution 3: The two sides of the middle part of the transmission main shaft are planar, and the two sides of the middle through hole of the rotating connecting ring are straight.

[0010] This design allows the rotating connecting ring, which is fitted onto the transmission shaft, to rotate as the transmission shaft rotates.

[0011] Preferred technical solution four: The bottom end face of the rotation limiting groove is inclined.

[0012] This design allows the ball bearings to disengage from the rotation limit groove after being resisted while rotating in the rotation limit groove, thus preventing the ball bearings from continuously driving the transmission gear plate to rotate.

[0013] Preferred technical solution five: One end of the first reset spring and the second reset spring are connected to the transmission main shaft, and the other end of the first reset spring and the second reset spring abuts against the top side of the top abutment ring.

[0014] This design enables the top abutment ring to be pushed against and limited by the ball bearings set in the limiting hole under the elastic contact of the first and second return springs.

[0015] Compared with the prior art, this utility model provides a heavy-duty electric hammer tripping device, which has the following beneficial effects:

[0016] (1) This utility model has a rotating connecting ring and a transmission gear plate on the transmission main shaft. The rotating connecting ring is evenly provided with a number of balls. Under the rebound force of the first return spring and the second return spring, the balls are resisted and limited by the top contact ring. When the balls are driven by a large force, they can disengage from the rotating limit groove and then be reset by the rebound force, thereby effectively driving the transmission gear plate to rotate. This avoids the balls from being difficult to return to their original working state after disengaging from the rotating limit groove, ensuring that the drilling function of the electric hammer is continuously effective and making it more convenient for users to use. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0018] Figure 2 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 3 This is an exploded view of the structure of this utility model;

[0020] Figure 4 For the present utility model Figure 3 Enlarged view of the middle limiting hole structure.

[0021] In the diagram: 1. Drive spindle; 2. Rotary connecting ring; 3. Limiting hole; 4. Ball bearing; 5. Drive gear plate; 6. Mounting slot; 7. Rotary limiting groove; 8. Bottom collar; 9. Top contact ring; 10. First return spring; 11. Second return spring; 12. Top closing ring. Detailed Implementation

[0022] Please see Figure 1-4 ,

[0023] Example 1: A heavy-duty electric hammer release device includes a transmission spindle 1, a rotating connecting ring 2 sleeved on the transmission spindle 1, and a plurality of limiting holes 3 evenly opened on the rotating connecting ring 2.

[0024] Each limiting hole 3 is equipped with a ball bearing 4. The bottom of the transmission spindle 1 is fitted with a transmission gear 5. The top center of the transmission gear 5 is provided with an installation slot 6. The bottom wall of the installation slot 6 is evenly provided with several rotation limiting grooves 7. The rotation connecting ring 2 is inserted into the installation slot 6. The bottom end of the transmission spindle 1 is fitted with a bottom collar 8. The transmission spindle 1 is also fitted with a top abutment ring 9, which is located on top of the rotation connecting ring 2. The top end of the transmission spindle 1 is fitted with a first return spring 10. The outside of the first return spring 10 is fitted with a second return spring 11. The top end of the transmission spindle 1 is provided with a top closing ring 12.

[0025] Example 2: The difference between this example and Example 1 is that the two sides of the middle part of the transmission main shaft 1 are planar, and the two sides of the middle through hole of the rotating connecting ring 2 are straight.

[0026] This causes the rotating connecting ring 2 to be sleeved on the transmission main shaft 1 and rotate as the transmission main shaft 1 rotates.

[0027] Example 3: The difference between this example and Example 1 is that the bottom surface of the rotation limiting groove 7 is inclined.

[0028] This allows the ball 4 to disengage from the rotation limit groove 7 after being resisted while rotating in the rotation limit groove 7, thus preventing the ball 4 from continuously driving the transmission gear plate 5 to rotate.

[0029] Example 4: The difference between this example and Example 1 is that one end of the first return spring 10 and the second return spring 11 is connected to the transmission main shaft 1, and the other end of the first return spring 10 and the second return spring 11 abuts against the top side of the top contact ring 9.

[0030] Under the elastic contact of the first return spring 10 and the second return spring 11, the top abutment ring 9 pushes the top abutment ring 9 to abut and limit the ball 4 provided in the limiting hole 3.

[0031] In this embodiment, existing heavy-duty electric hammer release devices also have various problems. For example, some traditional electric hammers use a friction plate release structure. In actual use, this structure has poor consistency, the release torque is difficult to guarantee accurately, and the overall reliability is poor. After a release, it is difficult to return to the original working state, which often leads to device failure and causes the electric hammer to lose its basic drilling function, causing great inconvenience to users.

[0032] In summary, in specific implementation, a rotating connecting ring 2 and a transmission gear 5 are fitted onto the transmission main shaft 1. The rotating connecting ring 2 is inserted into the mounting slot 6 opened on the top of the transmission gear 5. Several limiting holes 3 are evenly opened on the rotating connecting ring 2, and each limiting hole 3 is provided with a ball 4. A top abutting ring 9 is provided on the top of the rotating connecting ring 2. Under the elastic abutment of the first return spring 10 and the second return spring 11, the top abutting ring 9 elastically abuts against the ball 4 provided in the limiting hole 3, so that the bottom of the ball 4 can be pressed into the rotating limiting groove 7.

[0033] The bottom surface of the rotation limiting groove 7 is inclined, so that when the transmission main shaft 1 drives the ball 4 to rotate continuously in the limiting hole 3 through the rotation connecting ring 2, the ball 4 is stuck in the rotation limiting groove 7, which drives the transmission gear 5 to rotate. When the transmission force of the transmission main shaft 1 is large, after the ball 4 rotates to the side of the rotation limiting groove 7, the top contact ring 9 abuts against the ball 4 by the rebound force provided by the first return spring 10 and the second return spring 11.

[0034] This causes the rotating limiting groove 7 to disengage and move upward under the drive of the rotating connecting ring 2, causing the top abutment ring 9 to move upward. The ball 4 rotates only in the limiting hole 3. When the driving force of the transmission main shaft 1 decreases, the top abutment ring 9 will abut against the top surface of the ball 4 again under the resistance of the first return spring 10 and the second return spring 11, causing the ball 4 to be inserted into the rotating limiting groove 7 again, thereby driving the transmission gear plate 5 to rotate.

[0035] This transmission structure allows the ball bearing 4 to return to its original position after disengaging from the transmission gear 5 through springback force, thereby effectively driving the transmission gear 5 to rotate. This avoids the ball bearing 4 from being difficult to return to its original working state after disengaging from the rotation limit groove 7, ensuring the continuous effectiveness of the electric hammer's drilling function and making it more convenient for users.

Claims

1. A heavy-duty electric hammer tripping device, comprising a drive spindle (1), characterized in that: A rotating connecting ring (2) is sleeved on the transmission main shaft (1), and a plurality of limiting holes (3) are evenly opened on the rotating connecting ring (2). Each of the limiting holes (3) is provided with a ball (4), the bottom of the transmission spindle (1) is fitted with a transmission gear (5), the top of the transmission gear (5) is provided with a mounting slot (6), the bottom wall of the mounting slot (6) is evenly provided with a number of rotation limiting grooves (7), the rotation connecting ring (2) is inserted into the mounting slot (6), the bottom end of the transmission spindle (1) is fitted with a bottom collar (8), and the transmission spindle (1) is also fitted with a top abutment ring (9).

2. The heavy-duty electric hammer tripping device according to claim 1, characterized in that: The top contact ring (9) is located on top of the rotating connecting ring (2), and the top end of the transmission main shaft (1) is fitted with a first return spring (10).

3. The heavy-duty electric hammer tripping device according to claim 2, characterized in that: A second return spring (11) is sleeved on the outside of the first return spring (10), and a top closing ring (12) is provided at the top of the transmission main shaft (1).

4. The heavy-duty electric hammer release device according to claim 3, characterized in that: The two sides of the middle part of the transmission main shaft (1) are planar, and the two sides of the middle through hole of the rotating connecting ring (2) are straight.

5. The heavy-duty electric hammer release device according to claim 4, characterized in that: The bottom surface of the rotation limiting groove (7) is inclined.

6. The heavy-duty electric hammer tripping device according to claim 5, characterized in that: One end of the first reset spring (10) and the second reset spring (11) is connected to the transmission main shaft (1), and the other end of the first reset spring (10) and the second reset spring (11) abuts against the top side of the top abutment ring (9).

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