Anti-hand-twisting clutch tripping structure of electric hammer

Abstract

The utility model discloses an electric hammer hand-twisting-preventing clutch tripping structure, and particularly relates to the technical field of electric hammers, the electric hammer hand-twisting-preventing clutch tripping structure comprises an intermediate shaft, limiting clamping grooves are symmetrically formed in the two ends of the intermediate shaft, and a first limiting clamping ring and a second limiting clamping ring are arranged in the middles of the limiting clamping grooves respectively; the end, close to the second limiting clamping ring, of the middle shaft is sleeved with a transmission gear, and a bearing is arranged in the middle of the transmission gear. According to the electric hammer, the clutch ring is matched with the transmission gear, so that the transmission gear can drive the clutch ring to rotate, the transmission gear is separated from the clutch ring, clutch releasing is conveniently achieved, the situation that a hand is twisted when the electric hammer is used is prevented, releasing smoothness is improved through the balls, friction is avoided, and the service life is not affected; and the top ring is controlled to extrude the spring by rotating the adjusting nut, so that the extrusion strength of the spring on the clutch ring is improved, the tripping torque is conveniently adjusted, and the use effect is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electric hammers, and more specifically, to an anti-twist hand clutch tripping structure of an electric hammer. Background Art

[0002] An electric hammer is an electric rotary hammer drill with a pneumatic hammering mechanism and a safety clutch. If the working conditions suddenly change, the electric hammer may be overloaded or stalled. In severe cases, the transmission components may be damaged or even the motor may be burned. Moreover, the reaction force during stalling can easily injure people. Therefore, a trip structure is set inside the electric hammer to provide safety protection in the event of stalling.

[0003] Chinese patent application number CN202022711720.2 discloses a tripping mechanism for an electric hammer. The mechanism comprises a bevel gear, which is fitted with a distance ring, a bearing, flat teeth, a clutch pressure plate, a spring, a spring pressure plate, and a wire retaining ring, in sequence from top to bottom. The flat teeth are provided with a first groove, within which the clutch pressure plate is located. The purpose of this utility model is to provide a tripping mechanism for an electric hammer that is stable, safe, convenient, and has a long service life.

[0004] However, it can be seen from the drawings in its specification that the transmission and tripping functions are achieved through the trapezoidal blocks, which may easily cause wear of the trapezoidal blocks and trapezoidal grooves after long-term use, affecting their service life. In addition, the transmission torque of the trapezoidal blocks and trapezoidal grooves is achieved through spring push. When the spring force decreases, the transmission torque of the trapezoidal blocks and trapezoidal grooves will also decrease. The spring can only be replaced, which is inconvenient to adjust and use. Therefore, an electric hammer anti-twist hand clutch tripping structure is proposed. Utility Model Content

[0005] In order to overcome the above-mentioned defects of the prior art, the present invention provides an anti-twist hand clutch tripping structure for an electric hammer to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an anti-twist clutch release structure for an electric hammer, comprising an intermediate shaft, wherein limit slots are symmetrically provided at both ends of the intermediate shaft, and a first limit snap ring and a second limit snap ring are respectively provided in the middle of the limit slots, and the middle structure of the intermediate shaft can be limited by the first limit snap ring and the second limit snap ring, so that the combination can be used conveniently. The intermediate shaft is provided with a transmission gear sleeve at one end close to the second limit snap ring, and is conveniently connected to the driving gear through the transmission gear. A bearing is provided in the middle of the transmission gear, and the transmission gear can stably rotate in the middle of the intermediate shaft through the bearing without driving the intermediate shaft to rotate. A clutch ring is provided on one side of the transmission gear, and the transmission gear can drive the clutch ring to rotate through the cooperation of the clutch ring and the transmission gear and the clutch ring are separated, so that the clutch release is conveniently realized, thereby preventing the electric hammer from twisting the hand when in use and improving the use effect.

[0007] A top ring is provided on the side of the clutch ring away from the transmission gear, and a first connecting ring is fixedly connected to the middle part of one end of the clutch ring close to the top ring, and a limit ring and a second connecting ring are fixedly connected to one end of the top ring close to the clutch ring. A spring is provided between the limit ring and the second connecting ring. Through the cooperation of the limit ring and the second connecting ring with the first connecting ring, the cooperation effect of the connection between the top ring and the clutch ring can be improved, thereby performing position limiting protection on the spring in the middle. The spring pushes the clutch ring so that the clutch ring generates an extrusion force on the transmission gear, which facilitates the synchronous rotation of the clutch ring and the transmission gear, and the clutch ring squeezes the spring, which facilitates automatic tripping due to excessive torque, thereby improving the use effect.

[0008] The clutch ring is fixedly connected to a stabilizing ring on one side close to the transmission gear, and a plurality of steps are fixedly connected to one side of the stabilizing ring, and a plurality of balls are provided on the surface of the steps. A stabilizing ring groove is provided on one side of the transmission gear, and a plurality of step grooves are provided in the middle of the stabilizing ring groove. The cooperation between the stabilizing ring and the stabilizing ring groove improves the corresponding stability of the transmission gear and the clutch ring, and the cooperation between the step groove and the step facilitates the transmission gear to drive the clutch ring to rotate, facilitates automatic tripping when the rotation torque is too large, improves the anti-twist hand effect of the electric hammer, and improves the smoothness of the tripping through the balls, avoids friction and affects the service life;

[0009] The clutch ring and the first connecting ring are both fixedly connected to a limiting slide on one side of the middle part, and a limiting slide groove is provided on the surface of the intermediate shaft. An adjusting nut is provided on one end of the intermediate shaft close to the first limiting clamping ring. Through the cooperation of the limiting slide bar and the limiting slide groove, the intermediate shaft can be driven to rotate when the clutch ring rotates, so that the rotation of the output shaft of the electric hammer can be controlled conveniently through the transmission bevel gear at one end of the intermediate shaft, which is convenient for transmission use. The top ring is limited by the adjusting nut, and the squeezing of the top ring on the spring is controlled by rotating the adjusting nut, thereby increasing the squeezing strength of the spring on the clutch ring, thereby facilitating the adjustment of the tripping torque and improving the use effect.

[0010] Preferably, the clutch ring and the top ring are both sleeved on the middle part of the intermediate shaft, and the spring is arranged between the clutch ring and the first connecting ring, and one end of the spring is limited by the clutch ring and the first connecting ring.

[0011] Preferably, the cross-sectional shape of the first connecting ring and the second connecting ring is set to be "L"-shaped, and the first connecting ring is set in the middle of the second connecting ring. The first connecting ring and the second connecting ring are snap-connected, so that the top ring and the clutch ring are an integrated structure, which is convenient for installation and combined use.

[0012] Preferably, the outer surface diameter of the limiting ring is adapted to the inner surface diameter of the clutch ring, the limiting ring is arranged in the middle of the clutch ring, the middle diameter of the top ring is the same as the middle diameter of the first connecting ring, and the stability of the relative sliding of the top ring and the clutch ring is improved through the cooperation between the limiting ring and the clutch ring.

[0013] Preferably, the limiting slide is adapted to the limiting slide groove, and the limiting slide is arranged in the middle of the limiting slide groove. Through the cooperation of the limiting slide and the limiting slide groove, the rotation of the clutch ring can drive the intermediate shaft to rotate, which is convenient for transmission use.

[0014] Preferably, the stabilizing ring is adapted to the stabilizing ring groove, the step is adapted to the step groove, the step is arranged in the middle of the step groove, and the cross-sectional shapes of the step and the step groove are both arranged to be isosceles trapezoids. Through the cooperation of the stabilizing ring and the stabilizing ring groove, the corresponding strength of the step and the step groove is improved, and the step is tightly fitted with the step groove, so that the clutch ring can be driven to rotate through the step when the transmission gear rotates, thereby improving the use effect.

[0015] Preferably, the adjusting nut is arranged between the top ring and the first limiting clamping ring, and the adjusting nut is threadedly connected to the wall of the intermediate shaft. The top ring is limited by the adjusting nut, and the extrusion strength of the top ring is adjusted by rotating the adjusting nut. The extrusion strength of the spring on the clutch ring can be adjusted to improve the use effect.

[0016] The technical effects and advantages of this utility model are:

[0017] 1. The utility model firstly realizes the clutch ring to rotate by the transmission gear through the cooperation between the clutch ring and the transmission gear, and the clutch ring is separated by the transmission gear, so as to facilitate the clutch tripping and prevent the hand from twisting when the electric hammer is in use. The ball bearing improves the smoothness of the tripping and avoids friction that affects the service life. The top ring is controlled to squeeze the spring by rotating the adjusting nut, thereby increasing the squeezing strength of the spring on the clutch ring, thereby facilitating the adjustment of the tripping torque and improving the use effect.

[0018] 2. The present invention can also improve the coordination effect of the connection between the top ring and the clutch ring by cooperating with the limiting ring and the second connecting ring with the first connecting ring, thereby providing position limiting protection for the spring in the middle. The coordination between the stabilizing ring and the stabilizing ring groove improves the corresponding stability of the transmission gear and the clutch ring. By limiting one end of the spring through the clutch ring and the first connecting ring, the top ring and the clutch ring can be integrated into a structure, which is convenient for installation and combined use.

[0019] In summary, through the mutual influence of the above-mentioned multiple effects, it is convenient to automatically trip when the torque is too large, preventing the electric hammer from twisting its hands when in use, and improving the smoothness of the tripping, avoiding friction, facilitating the adjustment of the tripping torque, and improving the use effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0021] Figure 2 This is a schematic diagram of the split structure of the utility model.

[0022] Figure 3 It is a schematic diagram of the connection structure of the clutch ring and the top ring of the utility model.

[0023] Figure 4 It is a schematic diagram of the split cross-sectional structure of the clutch ring and the top ring of the utility model.

[0024] Figure 5 This is a schematic structural diagram of the transmission gear of the utility model.

[0025] The accompanying drawings are marked as follows: 1. intermediate shaft; 2. limiting groove; 3. first limiting snap ring; 4. second limiting snap ring; 5. transmission gear; 6. bearing; 7. clutch ring; 8. first connecting ring; 9. top ring; 10. limiting ring; 11. second connecting ring; 12. spring; 13. stabilizing ring; 14. step; 15. ball; 16. stabilizing ring groove; 17. step groove; 18. limiting slide; 19. limiting slide groove; 20. adjusting nut. DETAILED DESCRIPTION

[0026] 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.

[0027] As attached Figure 1-5 The illustrated embodiment of the anti-twist clutch release structure of an electric hammer comprises an intermediate shaft 1, with limit slots 2 symmetrically provided at both ends of the intermediate shaft 1, and a first limit snap ring 3 and a second limit snap ring 4 respectively provided in the middle of the limit slots 2. The first limit snap ring 3 and the second limit snap ring 4 can limit the middle structure of the intermediate shaft 1 for convenient combined use. A transmission gear 5 is sleeved on one end of the intermediate shaft 1 close to the second limit snap ring 4, which is conveniently connected to the driving gear through the transmission gear 5. A bearing 6 is provided in the middle of the transmission gear 5, which allows the transmission gear 5 to rotate stably in the middle of the intermediate shaft 1 through the bearing 6 and will not drive the intermediate shaft 1 to rotate. A clutch ring 7 is provided on one side of the transmission gear 5. Through the cooperation of the clutch ring 7 and the transmission gear 5, the transmission gear 5 can drive the clutch ring 7 to rotate, and the transmission gear 5 and the clutch ring 7 are separated, so as to facilitate the clutch release, prevent the electric hammer from twisting the hand when in use, and improve the use effect.

[0028] A top ring 9 is provided on the side of the clutch ring 7 away from the transmission gear 5, and a first connecting ring 8 is fixedly connected to the middle of one end of the clutch ring 7 close to the top ring 9. A limit ring 10 and a second connecting ring 11 are fixedly connected to one end of the top ring 9 close to the clutch ring 7. A spring 12 is provided between the limit ring 10 and the second connecting ring 11. A stabilizing ring 13 is fixedly connected to the side of the clutch ring 7 close to the transmission gear 5. A plurality of steps 14 are fixedly connected to one side of the stabilizing ring 13. A plurality of balls 15 are provided on the surface of the step 14. A transmission gear 5 is opened on one side. There is a stabilizing ring groove 16, and a plurality of step grooves 17 are provided in the middle of the stabilizing ring groove 16. The clutch ring 7 and the first connecting ring 8 are fixedly connected to the middle side of the limited slide 18. The surface of the intermediate shaft 1 is provided with a limited slide groove 19. The end of the intermediate shaft 1 close to the first limiting clamping ring 3 is provided with an adjusting nut 20. The cooperation between the limiting ring 10 and the second connecting ring 11 and the first connecting ring 8 can improve the cooperation effect of the connection between the top ring 9 and the clutch ring 7, thereby limiting the spring 12 in the middle and protecting the clutch ring 7 through the spring 12. The clutch ring 7 is pushed by the clutch ring 7 to generate an extrusion force on the transmission gear 5, which makes it convenient for the clutch ring 7 and the transmission gear 5 to rotate synchronously, and the clutch ring 7 squeezes the spring 12, which is convenient for automatic tripping when the torque is too large, thereby improving the use effect. The cooperation of the stabilizing ring 13 and the stabilizing ring groove 16 improves the corresponding stability of the transmission gear 5 and the clutch ring 7, and the cooperation of the step groove 17 and the step 14 makes it convenient for the transmission gear 5 to drive the clutch ring 7 to rotate, which is convenient for automatic tripping when the rotation torque is too large, thereby improving the anti-twist hand effect of the electric hammer, and through the ball 1 5. The smoothness of the tripping is improved to avoid friction that affects the service life. Through the cooperation of the limiting slide 18 and the limiting slide groove 19, the intermediate shaft 1 can be driven to rotate when the clutch ring 7 rotates, which makes it convenient to control the rotation of the output shaft of the electric hammer through the transmission bevel gear at one end of the intermediate shaft 1, and facilitates transmission use. The top ring 9 is limited by the adjusting nut 20, and the top ring 9 is controlled to squeeze the spring 12 by rotating the adjusting nut 20, thereby increasing the squeezing strength of the spring 12 on the clutch ring 7, thereby facilitating the adjustment of the tripping torque and improving the use effect.

[0029] As shown in Figures 1 and 2, the clutch ring 7 and the top ring 9 are both sleeved on the middle part of the intermediate shaft 1, the spring 12 is arranged between the clutch ring 7 and the first connecting ring 8, the cross-sectional shape of the first connecting ring 8 and the second connecting ring 11 is set to "L" shape, the first connecting ring 8 is arranged in the middle of the second connecting ring 11, the first connecting ring 8 and the second connecting ring 11 are snap-connected, the outer surface diameter of the limiting ring 10 is adapted to the inner surface diameter of the clutch ring 7, the limiting ring 10 is arranged in the middle of the clutch ring 7, the middle diameter of the top ring 9 is the same as the middle diameter of the first connecting ring 8, the limiting slide 18 is adapted to the limiting slide 19, the limiting slide 18 is arranged in the middle of the limiting slide 19, the stabilizing ring 13 is adapted to the stabilizing ring groove 16, the step 14 is adapted to the step groove 17, the step 14 is arranged in the middle of the step groove 17, the cross-sectional shape of the step 14 and the step groove 17 are both set to isosceles trapezoidal, and the adjusting nut 20 is arranged on the top ring 9 and the first limiting snap ring 3 The adjusting nut 20 is threadedly connected to the wall of the intermediate shaft 1, and one end of the spring 12 is limited by the clutch ring 7 and the first connecting ring 8, so that the top ring 9 and the clutch ring 7 can be integrated into a structure, which is convenient for installation and combined use. The cooperation between the limiting ring 10 and the clutch ring 7 improves the stability of the relative sliding of the top ring 9 and the clutch ring 7. The cooperation between the limiting slide 18 and the limiting slide groove 19 makes the clutch ring 7 rotate to drive the intermediate shaft 1 to rotate, which is convenient for transmission. The cooperation between the stabilizing ring 13 and the stabilizing ring groove 16 improves the corresponding strength of the step 14 and the step groove 17, and the step 14 fits tightly with the step groove 17. When the transmission gear 5 rotates, the clutch ring 7 can be driven to rotate through the step 14, thereby improving the use effect. The top ring 9 is limited by the adjusting nut 20, and the extrusion strength of the top ring 9 is adjusted by rotating the adjusting nut 20. The extrusion strength of the clutch ring 7 by the spring 12 can be adjusted, thereby improving the use effect.

[0030] The working principle of the utility model is as follows: when in use, one end of the intermediate shaft 1 is connected to the output shaft of the electric hammer through the bevel gear, so that the rotation of the intermediate shaft 1 drives the output shaft of the electric hammer to rotate, and at the same time, the gear on one side of the transmission gear 5 is connected to the output shaft of the motor, so that the motor starts and the transmission gear 5 is controlled to rotate at the same time;

[0031] When the transmission gear 5 rotates, the clutch ring 7 can be driven to rotate through the cooperation between the step 14 and the step groove 17, thereby driving the intermediate shaft 1 to rotate through the cooperation between the limiting slide 18 and the limiting slide groove 19;

[0032] When the resistance torque of the intermediate shaft 1 is large, the step 14 and the step groove 17 will be misaligned, thereby causing the transmission to trip, thereby reducing the torque of the electric hammer output shaft, thereby playing a role in preventing hand twisting, and the ball 15 can reduce the friction strength between the step 14 and the step groove 17, thereby increasing the service life;

[0033] When the tripping torque value decreases, the top ring 9 can be controlled to move toward one side of the clutch ring 7 by rotating the adjusting nut 20 to squeeze the spring 12, which can increase the tripping torque value, increase the torque of the electric hammer output shaft, and improve the use effect.

[0034] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A rotary hammer anti-twist hand clutch release structure, comprising an intermediate shaft (1), characterized in that: The two ends of the intermediate shaft (1) are symmetrically provided with limit slots (2), the middle of the limit slots (2) are provided with a first limit snap ring (3) and a second limit snap ring (4), the end of the intermediate shaft (1) close to the second limit snap ring (4) is sleeved with a transmission gear (5), the middle of the transmission gear (5) is provided with a bearing (6), and one side of the transmission gear (5) is provided with a clutch ring (7); A top ring (9) is provided on the side of the clutch ring (7) away from the transmission gear (5); a first connecting ring (8) is fixedly connected to the middle of one end of the clutch ring (7) close to the top ring (9); a limit ring (10) and a second connecting ring (11) are fixedly connected to one end of the top ring (9) close to the clutch ring (7); a spring (12) is provided between the limit ring (10) and the second connecting ring (11); A stabilizing ring (13) is fixedly connected to one side of the clutch ring (7) close to the transmission gear (5); a plurality of steps (14) are fixedly connected to one side of the stabilizing ring (13); a plurality of balls (15) are provided on the surface of the steps (14); a stabilizing ring groove (16) is provided on one side of the transmission gear (5); and a plurality of step grooves (17) are provided in the middle of the stabilizing ring groove (16); The clutch ring (7) and the first connecting ring (8) are both fixedly connected to a limiting slide bar (18) on one side of their middle parts. A limiting slide groove (19) is provided on the surface of the intermediate shaft (1). An adjusting nut (20) is sleeved on one end of the intermediate shaft (1) close to the first limiting clamping ring (3).

2. The anti-twist hand clutch release structure of an electric hammer according to claim 1, characterized in that: The clutch ring (7) and the top ring (9) are both sleeved on the middle part of the intermediate shaft (1), and the spring (12) is arranged between the clutch ring (7) and the first connecting ring (8).

3. The anti-twist hand clutch release structure of an electric hammer according to claim 1, characterized in that: The cross-sectional shape of the first connecting ring (8) and the second connecting ring (11) is set to be "L"-shaped, the first connecting ring (8) is set in the middle of the second connecting ring (11), and the first connecting ring (8) and the second connecting ring (11) are snap-fitted and connected.

4. The anti-twist hand clutch release structure for an electric hammer according to claim 1, characterized in that: The outer surface diameter of the limiting ring (10) is adapted to the inner surface diameter of the clutch ring (7), the limiting ring (10) is arranged in the middle of the clutch ring (7), and the middle diameter of the top ring (9) is the same as the middle diameter of the first connecting ring (8).

5. The anti-twist hand clutch release structure of an electric hammer according to claim 1, characterized in that: The limiting slide bar (18) is adapted to the limiting slide groove (19), and the limiting slide bar (18) is arranged in the middle of the limiting slide groove (19).

6. The anti-twist hand clutch release structure for an electric hammer according to claim 1, characterized in that: The stabilizing ring (13) is adapted to the stabilizing ring groove (16), the step (14) is adapted to the step groove (17), the step (14) is arranged in the middle of the step groove (17), and the cross-sectional shapes of the step (14) and the step groove (17) are both arranged to be isosceles trapezoids.

7. The anti-twist hand clutch release structure for an electric hammer according to claim 1, characterized in that: The adjusting nut (20) is arranged between the top ring (9) and the first limiting clamping ring (3), and the adjusting nut (20) is threadedly connected to the wall of the intermediate shaft (1).

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