Anti-overtwist safety tripping device

Abstract

The utility model discloses an anti-overtwist safety tripping device which comprises a first transmission gear, a ball is installed in the first transmission gear, the ball is connected with a clutch disc, the clutch disc is clamped with a connecting rod in a nested mode, and the diameter of the clutch disc is smaller than the inner diameter of the first transmission gear. According to the anti-overtwist safety tripping device, the elastic connecting mechanism is adopted, flexible connection between the clutch disc and the ball can be achieved, normal connection and transmission between the clutch disc and the first transmission gear can be guaranteed through the acting force of the spring in the actual use process, and when large torque occurs, the clutch disc and the ball can be separated through spring contraction, so that the clutch disc and the ball are separated, and the safety of the anti-overtwist safety tripping device is guaranteed. Therefore, the transmission function is automatically relieved, the situation that the hand of a user is injured due to large-torque overturning torsion is effectively avoided, the use safety of the electric hammer is guaranteed, and the whole device is simple in structure, high in reliability, good in practicability, easy to apply and popularize and high in practical value.

Description

Technical Field

[0001] The utility model relates to the technical field of electric hammer safety tripping, in particular to an over-torque prevention safety tripping device. Background Art

[0002] An electric hammer is an electric rotary hammer drill with a pneumatic hammer mechanism. In actual use, due to the large workload of the electric hammer, the human hand has limited gripping force when holding the tool. When encountering large torque, the human hand cannot restrain the tool, which makes it easy for the reverse torque of the tool to injure the hand or sprain the wrist. There is a certain safety issue. To this end, in response to the above problem, an anti-over-torque safety release device is designed to better meet the actual use needs. Utility Model Content

[0003] The purpose of the utility model is to provide an anti-over-torque safety tripping device to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an anti-over-torque safety release device, comprising a first transmission gear, in which a ball is installed, the ball is connected to a clutch plate, the clutch plate is nested and engaged with a connecting rod, and the diameter of the clutch plate is smaller than the inner diameter of the first transmission gear.

[0005] Preferably, a hollow column is fixed to the lower end of the first transmission gear, and the hollow column bearing is connected to the electric hammer, and a groove is provided at an angle on the first transmission gear. Through the action of the hollow column, basic guarantee can be provided for the normal rotation transmission of the first transmission gear.

[0006] Preferably, the groove and the ball cooperate to achieve a positioning effect, and the groove and the ball are distributed in a one-to-one correspondence. Through the cooperation between the groove and the ball, a basic guarantee can be provided for the normal transmission of the device, thereby ensuring the normal operation of the device.

[0007] Preferably, positioning holes are opened at equal angles on the clutch plate, and the diameter of the positioning holes is smaller than the diameter of the ball, and the positioning holes and the ball are nested. The nesting effect between the positioning holes and the ball can provide a basic guarantee for the transmission of the device.

[0008] Preferably, a fixing plate is fixed to the upper end of the connecting rod, and a second transmission gear is fixed to the upper end of the fixing plate, a vertical rod is fixed to the lower end of the connecting rod, and the diameter of the vertical rod is smaller than the inner diameter of the hollow column, and the vertical rod bearing is connected to the electric hammer. Through the action of the vertical rod, the normal rotation of the connecting rod can be guaranteed, thereby ensuring the normal operation of the device.

[0009] Preferably, one end of a spring is fixed to the lower end of the fixed plate, and the other end of the spring is fixed to the clutch plate. Through the action of the spring, a basic force can be provided for resetting the clutch plate, and a force can also be provided for the clutch plate during transmission to ensure normal transmission.

[0010] Compared with the prior art, the beneficial effects of the utility model are: the anti-over-torque safety release device adopts an elastic connection mechanism to achieve a soft connection between the clutch plate and the ball. In actual use, the normal connection transmission between the clutch plate and the first transmission gear can be guaranteed by the action force of the spring. When encountering a large torque, the clutch plate and the ball can be separated by the contraction of the spring, thereby automatically releasing the transmission effect, effectively avoiding the user's hand injury caused by the flipping torque of the large torque, ensuring the safety of the use of the electric hammer, and the whole device has a simple structure and high reliability, so it has good practicality, is easy to promote and apply, and has great practical value. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a schematic diagram of the exploded three-dimensional structure of the overall composition of the device of the utility model;

[0012] Figure 2 This is a schematic diagram of the exploded front view of the three-dimensional structure of the overall composition of the device of the utility model;

[0013] Figure 3 The utility model is a schematic diagram of an exploded three-dimensional structure when viewed from above as a whole.

[0014] In the figure: 1, first transmission gear; 101, hollow column; 102, groove; 2, ball bearing; 3, clutch plate; 301, positioning hole; 4, connecting rod; 401, fixing plate; 402, second transmission gear; 403, vertical rod; 5, spring. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0016] See also Figure 1-Figure 3 The utility model provides a technical solution: an anti-over-torque safety release device, comprising a first transmission gear 1, a ball 2 is installed in the first transmission gear 1, the ball 2 is connected to a clutch plate 3, the clutch plate 3 is nested and engaged with a connecting rod 4, and the diameter of the clutch plate 3 is smaller than the inner diameter of the first transmission gear 1.

[0017] A hollow column 101 is fixed to the lower end of the first transmission gear 1, and the hollow column 101 is bearing-connected to the electric hammer, and a groove 102 is provided at an angle on the first transmission gear 1; the groove 102 cooperates with the ball 2 to achieve a positioning effect, and the groove 102 and the ball 2 are distributed one-to-one; a positioning hole 301 is provided at an equal angle on the clutch plate 3, and the diameter of the positioning hole 301 is smaller than the diameter of the ball 2, and the positioning hole 301 and the ball 2 are nested; a fixing plate 401 is fixed to the upper end of the connecting rod 4, and a second transmission gear 402 is fixed to the upper end of the fixing plate 401, and a vertical rod 403 is fixed to the lower end of the connecting rod 4, and the diameter of the vertical rod 403 is smaller than the inner diameter of the hollow column 101, and the vertical rod 403 is bearing-connected to the electric hammer; one end of a spring 5 is fixed to the lower end of the fixing plate 401, and the other end of the spring 5 is fixed to the clutch plate 3;

[0018] When using the anti-over-torque safety release device, if Figure 1-Figure 3 As shown, the hollow column 101 and the vertical rod 403 are installed in the electric hammer through bearings, and the first transmission gear 1 is meshed with the gear driven by the motor in the electric hammer, and the second transmission gear 402 is meshed with the gear of the output mechanism of the electric hammer for transmission. In actual use, the motor drives the gear to rotate, and the first transmission gear 1 and the gear on the motor are matched to the transmission effect, so that the first transmission gear 1 can be rotated. At this time, the spring 5 provides a force for the clutch plate 3, so that the positioning hole 301, the ball 2 and the groove 102 are nested with each other. When the first transmission gear 1 rotates, the positioning hole 301, the ball 2 and the groove The transmission action between 102 can make the clutch plate 3, the connecting rod 4 and the second transmission gear 402 rotate, thereby ensuring the normal operation of the electric hammer output mechanism. When the electric hammer encounters a large torque during use, when the reverse torque is greater than the elastic force of the spring 5, the spring 5 is forced to contract, thereby separating the positioning hole 301 from the ball 2, and automatically releasing the transmission action between the first transmission gear 1 and the clutch plate 3, thereby effectively avoiding the user's hand injury due to the reverse torque of the large torque, and ensuring the safety of the electric hammer. This is the working principle of the anti-over-torque safety release device.

[0019] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An anti-over-torque safety release device, comprising a first transmission gear (1), characterized in that: A ball (2) is installed inside the first transmission gear (1), the ball (2) is connected to a clutch plate (3), the clutch plate (3) is nested and engaged with a connecting rod (4), and the diameter of the clutch plate (3) is smaller than the inner diameter of the first transmission gear (1).

2. The anti-over-torque safety release device according to claim 1, characterized in that: A hollow column (101) is fixed at the lower end of the first transmission gear (1), and the bearing of the hollow column (101) is connected to the electric hammer, and a groove (102) is provided at an angle on the first transmission gear (1).

3. The anti-over-torque safety release device according to claim 2, characterized in that: The groove (102) cooperates with the ball (2) to achieve a positioning effect, and the groove (102) and the ball (2) are distributed in a one-to-one correspondence.

4. The anti-over-torque safety release device according to claim 1, characterized in that: The clutch plate (3) is provided with positioning holes (301) at equal angles, the diameter of the positioning holes (301) is smaller than the diameter of the ball (2), and the positioning holes (301) and the ball (2) are nested and connected.

5. The anti-over-torque safety release device according to claim 1, characterized in that: A fixing plate (401) is fixed to the upper end of the connecting rod (4), and a second transmission gear (402) is fixed to the upper end of the fixing plate (401); a vertical rod (403) is fixed to the lower end of the connecting rod (4), and the diameter of the vertical rod (403) is smaller than the inner diameter of the hollow column (101), and the bearing of the vertical rod (403) is connected to the electric hammer.

6. The anti-over-torque safety release device according to claim 5, characterized in that: One end of a spring (5) is fixed to the lower end of the fixing plate (401), and the other end of the spring (5) is fixed to the clutch plate (3).

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