A ratchet wrench

Abstract

The present invention belongs to the field of hardware tools, and specifically relates to a ratchet wrench, comprising a wrench head and a handle body, wherein a ratchet is provided on the side wall on the other side of the wrench head, a slot is provided between the jaws and the ratchet, and the slot extends axially through the wrench head, wherein a sliding pin is provided at one end of the handle body, wherein the sliding pin is disposed within the slot, and a ratchet mechanism is provided within the handle body, wherein the ratchet mechanism can cooperate with the ratchet. The present invention has a simple structure and is easy to use. The meshing state of the handle body and the wrench head can be adjusted by simply pressing and tightening the handle, thereby enabling the disassembly of parts through the simple harmonic motion of the handle body alone, and can be used within a limited force application space.

Description

Technical Field

[0001] The invention belongs to the field of hardware tools, and in particular relates to a ratchet wrench. Background Art

[0002] Currently, when removing the nut at the end of the pipeline, the wrench often cannot be turned normally because there are too many obstacles, which seriously affect the force application space of the wrench. It is very difficult to operate an ordinary wrench, and the efficiency is low when it is forced to operate. Summary of the Invention

[0003] In response to the above problems, the present invention provides a ratchet wrench with a simple structure and easy use. The engagement state of the handle body and the wrench head can be adjusted by simply pressing and tightening the handle, so that parts can be disassembled only through the simple harmonic motion of the handle body, and can be used within a limited force application space.

[0004] The present invention provides a ratchet wrench comprising a wrench head and a handle body, the wrench head being movably connected to one end of the handle body. The wrench head is cylindrical, with jaws extending axially through one side of the wrench head. The jaws employed in the present invention are open, 9-point jaws suitable for removing a variety of pipe fittings or nuts. The center of the jaws does not coincide with the axis of the wrench head, but rather is offset to one side.

[0005] A ratchet is located on the sidewall of the wrench head on the other side, and a slot runs axially through the wrench head between the jaws and the ratchet. Both the ratchet and slot are located on the side opposite the jaws. The ratchet cooperates with the handle to drive the wrench head, while the slot cooperates with the handle to limit the position. Both are located on the side opposite the jaws, ensuring that the handle does not affect the jaws' grip on the part after installation.

[0006] The handle body is provided with a sliding pin at one end, the sliding pin being arranged in the slide groove, and the two ends of the sliding pin being fixed to the handle body so that the handle body can slide in the slide groove through the sliding pin. For a stable connection, the present invention generally provides two sliding pins.

[0007] A pawl mechanism is provided inside the handle body, and the pawl mechanism can cooperate with the ratchet. The pawl mechanism described in the present invention includes a pawl, a return spring, a push rod, a rotating shaft and a clamping handle. The pawl can cooperate with the ratchet. The push rod is provided in the handle body, one end of the push rod is connected to the pawl, the return spring is sleeved on the outside of the push rod, the middle part of the clamping handle is movably connected to the rotating shaft and can rotate around the rotating shaft, one end of the clamping handle extends into the handle body and is connected to the end of the push rod away from the pawl, and the other end of the clamping handle extends out of the handle body. The push rod described in the present invention has the same direction as the handle body, generally facing the axis direction of the wrench head, and the direction of the rotating shaft is perpendicular to the direction of the push rod, so that when the clamping handle rotates, it can drive the push rod to move in its own direction, that is, toward the wrench head.

[0008] The present invention applies force to the clamping handle from the outside, causing the clamping handle to rotate, driving the push rod to move toward the wrench head, causing the pawl to move and engage with the ratchet. At this time, the wrench head and the handle body are relatively fixed, and the handle body can drive the wrench head to rotate for disassembly. At this time, the reset spring should be in a compressed state; when the external force is removed, the push rod returns to its original position under the action of the reset spring, driving the pawl to disengage from the ratchet. At this time, the wrench head and the handle body are disconnected, and one end of the handle body can slide in the slide groove without the wrench head rotating, so as to adjust the relative position of the handle body.

[0009] The slide groove of the present invention should be in an arc shape, and the circle where the slide groove is located should be coaxial with the wrench head, so that the handle body can slide and rotate around the wrench head when adjusting the relative position.

[0010] The angle range of the ratchet used in the present invention is 140.6°, and the angle range of the slide groove is 200°, which can ensure that no matter where the handle body is rotated, there is a ratchet that can cooperate with the pawl.

[0011] More preferably, a fixed wrench is provided on the end of the handle body away from the wrench head, which can adapt to nuts with sizes different from those of the screw head.

[0012] Compared with the prior art, the present invention has the following advantages:

[0013] 1. The present invention has a simple structure and is easy to use. The engagement state of the handle body and the wrench head can be adjusted by simply pressing the handle. Parts can be disassembled only through the simple harmonic motion of the handle body. It can be used in a limited force application space.

[0014] 2. Easy installation, saving time and effort, greatly improving the operator's work efficiency and facilitating production. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is the structure diagram of this application.

[0016] Figure 2 It is a side view of this application.

[0017] In the figure, 1. wrench head, 2. ratchet, 3. sliding pin, 4. pawl, 5. return spring, 6. handle body, 7. countersunk screw, 8. push rod, 9. pin, 10. rotating shaft, 11. clamping handle, 12. fixed wrench, 13. jaws, 14. slide groove. DETAILED DESCRIPTION

[0018] The present invention is further described below with reference to the accompanying drawings and embodiments.

[0019] A ratchet wrench with an open end includes a cylindrical wrench head 1 with an upward-facing, 9-angled jaw 13 on its upper side. Ratchet teeth 2 with an angle of 140.6° are provided on the sidewall of the lower outer ring of the wrench head 1. An arc-shaped slot 14 is provided between the jaw 13 and the ratchet teeth 2. The slot 14 is concentric with the wrench head 1 and extends over a 200° angle.

[0020] The handle body 6 has a groove at its top end, with two sliding pins 3 positioned within the groove. Insert the lower side of the wrench head 1 with the ratchet teeth 2 into the groove, then install the sliding pins 3. Pass the sliding pins 3 through the chute 14 and secure both ends to the handle body 6 on either side of the groove, allowing the sliding pins 3 to slide along the chute 14. Once the handle body 6 is connected, it should be oriented toward the axis of the wrench head.

[0021] A push rod 8 is provided inside the handle body 6 and along the direction of the handle body. The upper end of the push rod 8 is connected to the pawl 4. When the push rod 8 moves toward the wrench head 1, the pawl 4 approaches the ratchet 2 and can cooperate with the ratchet 2 to form a ratchet structure. A reset spring 5 is sleeved on the outside of the push rod 8. When the push rod 8 moves toward the wrench head 1, the reset spring 5 is compressed. A clamping handle 11 is installed on the lower side of the handle body 6. One end of the clamping handle 11 is grooved and sleeved on both sides of the handle body 1. It passes through both sides through a pin 9 and is connected to the lower end of the internal push rod 8. The other end of the clamping handle 11 extends to the outside of the handle body 1 for a pressing operation. The clamping handle 11 rotates around the rotating shaft 10 that passes through the handle body, forming a lever at both ends. Pressing the outer end causes the inner end to move upward, driving the push rod 8 to move toward the wrench head 1, so that the pawl 4 cooperates with the ratchet 2.

[0022] The lower end of the handle body 6 can be provided with different sizes of wrenches according to different options to widen the use scenarios. Cover plates can also be installed on both sides through countersunk screws 7 to improve the appearance and provide protection.

[0023] The present invention is used as follows: the jaws 13 are placed on the nut, and the pressing handle 11 is pressed downward. The pressing handle 11 rotates and drives the push rod 8 to move toward the wrench head 1, and the pawl 4 engages with the ratchet 2. At this time, the wrench head 1 and the handle body 6 are relatively fixed. Applying force to press the handle body 6 can drive the wrench head 1 to rotate, thereby removing the nut. After rotating a certain angle, the pressing handle 11 is released. The push rod 8 moves downward under the action of the return spring 5 to return to its original position. The pawl 4 disengages from the ratchet 2. At this time, the wrench head 1 and the handle body 6 are relatively loose. Pressing the handle body 6 does not drive the wrench head 1 to rotate. The sliding pin 3 can slide in the chute 14, causing the handle body to "idle" and return to its original position. The pressing handle 11 is then pressed downward for a second rotation. Through the reciprocating motion described above, the parts can be disassembled within the limited rotation space of the handle body, only through the simple harmonic motion of the handle body.

Claims

1. A ratchet wrench, comprising a wrench head and a handle body, wherein the wrench head is movably connected to one end of the handle body, characterized in that: The wrench head is cylindrical, with a jaw extending axially therethrough on one side of the wrench head, a ratchet on the sidewall of the other side of the wrench head, and a slide groove extending axially therethrough between the jaw and the ratchet; a sliding pin is provided at one end of the handle body, the sliding pin being arranged in and slidable in the slide groove, a pawl mechanism being provided inside the handle body, the ratchet extending into the handle body and being capable of cooperating with the pawl mechanism; the slide groove is arc-shaped, and the circle in which the slide groove is located is coaxial with the wrench head; The pawl mechanism includes a pawl, a return spring, a push rod, a rotating shaft and a clamping handle. The pawl can cooperate with the ratchet. The push rod is arranged in the handle body, one end of the push rod is connected to the pawl, and the return spring is sleeved on the outside of the push rod; the middle part of the clamping handle is movably connected to the rotating shaft and can rotate around the rotating shaft, one end of the clamping handle is connected to the end of the push rod away from the pawl through a pin shaft, and the other end of the clamping handle extends out of the handle body.

2. A ratchet wrench according to claim 1, characterized in that: The direction of the rotating shaft is perpendicular to the push rod.

3. A ratchet wrench according to claim 2, characterized in that: When the pawl is engaged with the ratchet, the return spring is in a compressed state; when the pawl is separated from the ratchet, the return spring is in a relaxed state.

4. A ratchet wrench according to claim 1, characterized in that: The angle range of the chute is 200°.

5. A ratchet wrench according to claim 1, characterized in that: The angle range of the ratchet is 140.6°.

6. A ratchet wrench according to claim 1, characterized in that: The jaws are open 9-angle jaws.

7. The ratchet wrench according to claim 1, characterized in that: A fixed wrench is provided on one end of the handle body away from the wrench head.

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