Ratchet wrench

Abstract

This utility model relates to a ratchet wrench, belonging to the field of tool technology. The wrench includes a handle-shaped housing, with a locking component and a wrench head mounted on the front end of the housing via fasteners. The locking component has a locking position and an unlocking position that can be moved along the length of the housing. The wrench head has a positioning state corresponding to the locking position and a rotational state around the central axis of the housing's length corresponding to the unlocking position. A push button, forming a sliding pair, is installed near the front end of the housing. The push button has a natural position and a pushed position that respectively place the locking component in the locking and unlocking positions. This utility model improves the structural design by using a push button, thus making the rotational adjustment of the wrench head more convenient.

Description

Technical Field

[0001] This utility model relates to a wrench, and more particularly to a ratchet wrench, belonging to the field of tool technology. Background Technology

[0002] Patent document with application number 095127351 and publication number TWI332889B discloses a "pneumatic ratchet tool with a rotatable head". The power tool includes: a housing having a longitudinal axis; a head including an output member that can be powered to drill; a motor disposed within the housing and operatively connected to the output member; a connector for attaching the head to the housing, the connector being adapted to allow the head to rotate relative to the housing about the longitudinal axis of the housing; and a locking mechanism that can releasably lock the head to a selected angular position around the longitudinal axis of the housing; wherein the locking mechanism is generally slidable along the longitudinal axis of the housing between a locked position and a released position, in which the head remains stationary relative to the housing, and in the released position the head can rotate relative to the housing. This technical solution allows the output component of the head—the wrench—to be rotated and adjusted as needed, enabling it to be positioned at different selected angles relative to the housing, thus adapting to the operational requirements of different occasions. However, when performing rotational adjustment, one hand needs to hold the handle of the housing, while the other hand needs to grasp the unlocking part of the locking mechanism, which is quite inconvenient. Utility Model Content

[0003] The purpose of this utility model is to address the shortcomings of the existing technology by improving the structure and proposing a ratchet wrench that can be easily unlocked with one hand, making it more convenient to use.

[0004] To achieve the above objectives, the basic technical solution of the ratchet wrench of this utility model is as follows: it includes a handle-shaped housing, and a locking component and a wrench head are installed at the front end of the housing via fasteners;

[0005] The locking element has a locking position and an unlocking position that can be displaced along the length of the housing;

[0006] The wrench head has a positioning state corresponding to the locking position and a state corresponding to the unlocking position that can rotate around the central axis of the shell length direction;

[0007] The housing is equipped with a push button near its front end, which forms a sliding pair with the housing. The push button has a natural position and a pushed position that respectively place the locking member in the locked position and the unlocked position.

[0008] In use, since the thumb of the hand holding the housing still has a certain degree of freedom, it can push the push button to the push position as needed, thereby causing the locking component to move to the unlock position, and the wrench head to be in the rotated state; under the turning action of the other hand, it can be rotated relative to the housing as needed. Afterwards, the push button returns to its natural position, the locking component returns to the locked position, and the wrench head is in the positioned state; then the wrench head can be engaged with the fastener to be disassembled or assembled, and the operation can be carried out.

[0009] It is easy to understand that, because this utility model improves the structural design by using a push button, the rotation adjustment of the wrench head is more convenient compared with the prior art.

[0010] A further improvement of this utility model is that the front end of the housing is screwed into the large end thread of the fastening nut, and the small end thread of the fastening nut is screwed into the rear end thread of the transmission component.

[0011] A further improvement of this utility model is that the transmission component is equipped with a gear shaft that is connected to the output shaft of the motor. The outer circle of the middle part of the transmission component has circumferentially spaced positioning recesses and a wrench rear end sleeve with positioning holes is fitted on it. The positioning holes are used to house locking steel balls.

[0012] A further improvement of this utility model is that the front end of the gear shaft of the transmission component is connected to the ratchet mechanism inside the wrench head; the locking component is a locking sleeve, and the rear sleeve section of the wrench head is fitted with the locking sleeve that is dynamically engaged with it, and a return spring is installed between the two; the locking sleeve has a relief groove inside, and a locking groove for inserting a card elastic clamp on its outer circle.

[0013] A further improvement of this utility model is that a sliding groove is provided near the front end of the housing, and a push button that forms a sliding pair with it is installed in the sliding groove. The push button can slide between the natural position and the pushed position of the sliding groove. Attached Figure Description

[0014] The present invention will be further described below with reference to the accompanying drawings.

[0015] Figure 1 This is a structural schematic diagram of Embodiment 1 of the present invention.

[0016] Figure 2 yes Figure 1 A three-dimensional exploded structural diagram of the embodiment.

[0017] Figure 3 yes Figure 1 A cross-sectional view of the locked state in the embodiment.

[0018] Figure 4 yes Figure 1 A cross-sectional view of the unlocked state in the embodiment. Detailed Implementation Example 1

[0019] This embodiment is an electric ratchet wrench, the structure of which is as follows: Figure 1 and Figure 2 As shown. The handle-shaped housing 9 has a longitudinal central axis, in which the motor is installed. The front end of the housing is fitted with a locking sleeve 4 and a wrench head 1 via a fastening nut 8. Specifically, the front end of the housing 9 is screwed into the large end thread of the fastening nut 8, and the small end thread of the fastening nut 8 is screwed into the rear end of the transmission component 7. The transmission component 7 contains a gear shaft 7.2 that is driven and connected to the output shaft of the motor. The outer circumference of the middle part of the transmission component 7 has circumferentially spaced positioning recesses 7.1, and a rear end sleeve of the wrench head 1 with positioning holes 1.1 for accommodating locking steel balls 2 is fitted on it. The front end of the gear shaft 7.2 of the transmission component 7 is driven and connected to a ratchet mechanism inside the wrench head 1. The rear end sleeve of the wrench head 1 is fitted with a locking sleeve 4 that is dynamically engaged with it, and a return spring 3 is installed between the two, so that the locking sleeve 4 tends to move towards the fastening nut 8 in its natural state.

[0020] The locking sleeve 4 has a relief groove 4.2 inside and a locking groove 4.1 for inserting a card elastic clamp 5 on its outer circle. The housing 9 has a sliding groove 9.1 near the front end, in which a push button 6 is installed to form a sliding pair. The push button 6 can slide between the natural position and the pushed position along the sliding groove 9.1.

[0021] When in use, after holding the handle with one hand, when the thumb pushes the push plate 6.2 to push the push button 6 from the natural position forward to the push position, the clamp 5 drives the locking sleeve 4 to compress the return spring 3, and the sleeve section relative to the wrench head 1 moves forward from the locked position to the unlocked position, so that the clearance groove 4.2, which was originally offset from the positioning hole 1.1, is aligned with the hole. Figure 4 As shown in the unlocked state), the locking steel ball 2, which was originally stuck in the positioning hole 1.1 and the positioning recess 7.1, is released. The wrench head 1 changes from the positioning state to the rotational state that can rotate around the central axis of the housing length direction. As long as the other hand rotates the wrench head 1, it can be rotated relative to the housing 9. After rotating to the adjacent positioning recess position (usually rotated 90°), the push button 6 is released, and it returns to the natural position under the action of the return spring 3. Figure 3 (As shown in the locked state), the locking sleeve 4 returns to the locked position, and the wrench head 1 is once again in the positioning state where the locking steel ball 2 is engaged in the positioning hole 1.1 and the positioning recess 7.1, thus completing the rotation adjustment of the wrench head conveniently and quickly.

[0022] Tests show that during the reversing unlocking operation in this embodiment, one hand holding the handle only needs to apply force with the thumb towards the front to move the locking sleeve to the unlocking position, and the direction of force application is natural and effortless; the locking sleeve is moved by pushing the button, and the moving structure is safe and stable, and the locking sleeve will not suddenly reset due to hand slippage during unlocking, thereby avoiding the risk of pinching the hand.

[0023] In addition to the embodiments described above, this utility model may have other implementations. All technical solutions formed by equivalent substitution or equivalent transformation fall within the protection scope claimed by this utility model.

Claims

1. A ratchet wrench, comprising a handle-shaped housing, wherein a locking element and a wrench head are mounted on the front end of the housing via fasteners; The locking element has a locking position and an unlocking position that can be displaced along the length of the housing; The wrench head has a positioning state corresponding to the locking position and a rotational state corresponding to the unlocking position around the central axis of the housing length direction; characterized in that: The housing is equipped with a push button near its front end, which forms a sliding pair with the housing. The push button has a natural position and a pushed position that respectively place the locking member in the locked position and the unlocked position.

2. The ratchet wrench according to claim 1, characterized in that: The front end of the housing is screwed into the large end thread of the fastening nut, and the small end thread of the fastening nut is screwed into the rear end thread of the transmission component.

3. The ratchet wrench according to claim 2, characterized in that: The transmission component is equipped with a gear shaft that is connected to the output shaft of the motor. The outer circle of the middle part of the transmission component has circumferentially spaced positioning recesses and a wrench rear end sleeve with positioning holes is fitted on it. The positioning holes are used to house locking steel balls.

4. The ratchet wrench according to claim 3, characterized in that: The front end of the gear shaft of the transmission component is connected to the ratchet mechanism inside the wrench head; the locking component is a locking sleeve, and the rear sleeve section of the wrench head is fitted with the locking sleeve, and a return spring is installed between the two; the locking sleeve has a relief groove inside and a locking groove for inserting a flexible clamp on the outer circle.

5. The ratchet wrench according to claim 4, characterized in that: The housing is provided with a sliding groove near the front end, and a push button that forms a sliding pair with it is installed in the sliding groove. The push button can slide between the natural position and the pushed position of the sliding groove.

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