Ratchet wrench

Abstract

The ratchet wrench comprises a handle and a ratchet handle body connected with the handle, a ratchet head and a reversing mechanism used for changing the rotating direction of the ratchet head are arranged in the ratchet handle body, the reversing mechanism comprises a reversing knob and a support assembly used for connecting the reversing knob and the ratchet head, and the support assembly is arranged below the reversing knob. The ratchet head is arranged below the support assembly. The ratchet wrench overcomes the problems that a traditional ratchet wrench is inconvenient to operate, limited in application range, short in service life and the like, and achieves the technical effects of being convenient to operate, wide in application range and long in service life.

Description

Technical Field

[0001] This utility model relates to the field of manual tool technology, and in particular to a ratchet wrench. Background Technology

[0002] Traditional ratchet wrenches, as common tools, generally consist of a handle, a ratchet head, and a socket. In actual use, the user places the socket on the nut or bolt, and the reciprocating motion of the handle rotates the ratchet head, thus tightening or loosening the nut or bolt. However, traditional ratchet wrenches have many drawbacks:

[0003] 1. Inconvenient to operate: Its operation method is relatively simple, and the tightening action can only be completed by swinging left and right. In some scenarios that require fine operation or where space is limited, the operation flexibility is seriously insufficient.

[0004] 2. Limited application scope: When in a confined space, traditional ratchet wrenches are difficult to tighten nuts or bolts quickly and effectively. Furthermore, they cannot rotate nuts and bolts that are in a loose state, which greatly limits their application scenarios.

[0005] 3. Limited service life: Traditional ratchet wrenches rely on ratchet and pawl for transmission. During long-term and frequent use, the ratchet and pawl are prone to wear, which affects the service life of the entire wrench. Summary of the Invention

[0006] The purpose of this utility model is to solve the above-mentioned technical problems and provide a ratchet wrench. This utility model overcomes the problems of inconvenient operation, limited application range and short service life of traditional ratchet wrenches, and achieves the technical effects of convenient operation, wide application range and long service life.

[0007] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: a ratchet wrench, including a handle and a ratchet shank connected to the handle. The ratchet shank contains a ratchet head and a reversing mechanism for changing the rotation direction of the ratchet head. The reversing mechanism includes a reversing knob and a bracket assembly for connecting the reversing knob and the ratchet head. The bracket assembly is located below the reversing knob, and the ratchet head is located below the bracket assembly. Users can easily change the rotation direction of the ratchet head by operating the reversing knob, via the transmission of the bracket assembly, greatly improving operational convenience and adapting to different needs for tightening or loosening nuts and bolts.

[0008] Preferably, the support assembly includes a reversing bracket and several rollers, with the rollers housed within the reversing bracket, which is positioned between the reversing knob and the ratchet head. The movement of the rollers within the reversing bracket assists in the transmission and direction change of force, reducing friction during transmission and making the reversing operation smoother and more flexible. This also improves transmission efficiency and ensures stable operation of the reversing mechanism.

[0009] Preferably, the reversing bracket is provided with a first slot, a second slot, and a third slot. The rollers include a first roller, a second roller, and a third roller. The first roller is engaged in the first slot, the second roller is engaged in the second slot, and the third roller is engaged in the third slot. On the one hand, the precise slot positioning ensures that the rollers work stably in specific positions, avoiding displacement deviations during operation and ensuring the accuracy of transmission. On the other hand, this design allows each roller to have a clear division of labor and work together, further optimizing the transmission performance of the reversing mechanism and enhancing the reliability of the overall structure.

[0010] Preferably, the support assembly also includes a transmission crown gear set, which includes a reverse transmission crown gear located below the reversing knob and a forward transmission crown gear located above the ratchet head. The teeth of the reverse and forward transmission crown gears are arranged opposite each other, and the reversing support is located between the forward and reverse transmission crown gears. By configuring the transmission crown gear set, the forward and reverse rotation of the ratchet head can be precisely switched, greatly improving the accuracy and stability of the rotation direction change, and enhancing the applicability of the entire ratchet wrench in different working scenarios.

[0011] Preferably, the ratchet head includes a ring, a head, and a tail. The forward drive crown gear is located on the ring, and the tail passes through the forward drive crown gear and inserts into the reversing bracket. The ring, head, and tail are integrally formed. This integrally formed structure enhances the overall strength and stability of the ratchet head, reduces weak points caused by splicing, and improves its service life. At the same time, the reasonable layout of each part makes power transmission more direct and efficient, ensuring the stable operation of the ratchet head under complex working conditions.

[0012] Preferably, the ratchet head is also equipped with a ratchet head retaining ring, which has an opening that engages with the ratchet head. The ratchet head retaining ring restricts the axial displacement of the ratchet head within the ratchet shank body, ensuring that the ratchet head remains in the correct position during operation, avoiding transmission failures caused by displacement, improving the stability and reliability of the ratchet wrench during operation, and extending its overall service life.

[0013] Preferably, the ratchet shank also includes a quick-release push rod, with a push rod spring located below it. The quick-release push rod passes through the reversing bracket and engages with the ratchet head. This combination of the quick-release push rod and push rod spring, along with the engagement relationship between the quick-release push rod and the ratchet head, facilitates the quick disassembly and installation of the ratchet head and accessories such as external sleeves. When replacing a sleeve, pressing the quick-release push rod compresses the push rod spring, releasing the sleeve and enabling quick disassembly. During installation, releasing the quick-release push rod causes it to automatically reset under the action of the push rod spring, locking the sleeve and significantly improving work efficiency.

[0014] Preferably, the ratchet head has a first through hole containing a steel ball. The quick-release push rod has a second and a third groove. The quick-release push rod passes through the ratchet head, positioning either the second or third groove within the first through hole. The third groove is deeper than the second groove. The steel ball in the first through hole serves as an auxiliary positioning and connection mechanism. The steel ball is embedded in the second groove, and the first through hole holds the steel ball in place to prevent it from falling out, improving the convenience and stability of the connection. When the quick-release push rod is pressed, the steel ball moves from the second groove into the third groove, achieving quick release. Releasing the push rod causes it to automatically move upward under spring force, locking the steel ball in contact with the second groove.

[0015] Preferably, a drive shaft is provided between the ratchet handle and the handle. One end of the drive shaft is inserted into the ratchet handle and meshes with the reverse drive crown gear and the forward drive crown gear, respectively. The presence of the drive shaft allows the power of the handle to be efficiently and stably transmitted to the ratchet handle and the ratchet head. Whether the handle swings or rotates, the power can be smoothly converted into the rotational power of the ratchet head through the drive shaft, enriching the operation methods, improving the flexibility of operation, and meeting the power transmission needs in different working scenarios.

[0016] Preferably, the ratchet shank has a second through hole, and the drive shaft has a first groove. The drive shaft stop block passes through the second through hole and engages with the first groove. By engaging with the first groove through the second through hole, the drive shaft can be effectively prevented from rotating circumferentially or moving axially during operation, ensuring the stability and accuracy of the drive shaft in transmitting power. This, in turn, guarantees the stable operation of the entire ratchet wrench power transmission system and improves operational reliability.

[0017] The beneficial effects of this utility model are: it overcomes the problems of inconvenient operation, limited application scope and short service life of traditional ratchet wrenches, and achieves the technical effects of convenient operation, wide application scope and long service life. Attached Figure Description

[0018] Figure 1 This is an exploded view of this utility model.

[0019] Figure 2 This is a schematic diagram of the reversing mechanism and ratchet head.

[0020] Figure 3 This is a schematic diagram of the transmission structure of this utility model.

[0021] In the diagram: 1. Reversing knob; 2. Ratchet head; 21. Head; 211. First through hole; 22. Ring; 23. Tail; 3. Ratchet handle; 31. Second through hole; 4. Reverse drive crown gear; 5. Forward drive crown gear; 6. Quick release push rod; 61. Second groove; 62. Third groove; 7. First roller; 8. Second roller; 9. Third roller; 10. Steel ball; 11. Drive shaft; 111. First groove; 12. Handle; 13. Ratchet head stop ring; 131. Opening; 14. Push rod spring; 15. Drive shaft stop block; 16. Reversing bracket; 161. First slot; 162. Second slot; 163. Third slot. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0023] like Figure 1-3 As shown, this utility model discloses a ratchet wrench, including a handle 12 and a ratchet handle 3 connected to the handle 12. The ratchet handle 3 is provided with a ratchet head 2 and a reversing mechanism for changing the rotation direction of the ratchet head 2. The reversing mechanism includes a reversing knob 1 and a bracket assembly for connecting the reversing knob 1 and the ratchet head 2. The bracket assembly is located below the reversing knob 1, and the ratchet head 2 is located below the bracket assembly.

[0024] The support assembly includes a reversing support 16 and several rollers. The rollers are disposed inside the reversing support 16, which is located between the reversing knob 1 and the ratchet head 2. The ratchet head 2 drives the reversing support 16 to switch the rollers by rotating the reversing knob 1, thereby switching the relative positions of the rollers with the ratchet handle 3.

[0025] The reversing bracket 16 is provided with a first slot 161, a second slot 162, and a third slot 163. The rollers include a first roller 7, a second roller 8, and a third roller 9. The first roller 7 is engaged in the first slot 161, the second roller 8 is engaged in the second slot 162, and the third roller 9 is engaged in the third slot 163.

[0026] The support assembly also includes a transmission crown gear set, which includes a reverse transmission crown gear 4 located below the reversing knob 1 and a forward transmission crown gear 5 located above the ratchet head 2. The teeth of the reverse transmission crown gear 4 and the forward transmission crown gear 5 are arranged opposite to each other, and the reversing support 16 is located between the forward transmission crown gear 5 and the reverse transmission crown gear 4.

[0027] The ratchet head 2 includes a ring portion 22, a head portion 21, and a tail portion 23. The forward drive crown gear 5 is disposed on the ring portion 22, and the tail portion 23 passes through the forward drive crown gear 5 and is inserted into the reversing bracket 16. The ring portion 22, the head portion 21, and the tail portion 23 are integrally formed.

[0028] The ratchet head 2 is also fitted with a ratchet head stop ring 13, which has an opening 131 that engages with the ratchet head 2.

[0029] The ratchet handle 3 is also equipped with a quick release push rod 6, and a push rod spring 14 is provided below the quick release push rod 6. The quick release push rod 6 passes through the reversing bracket 16 and is locked onto the ratchet head 2.

[0030] The head 21 is provided with a first through hole 211, and a steel ball 10 is provided in the first through hole 211. The quick release push rod 6 is provided with a second groove 61 and a third groove 62. The quick release push rod 6 passes through the ratchet head 2 and sets the second groove 61 or the third groove 62 in the first through hole 211. The depth of the third groove 62 is greater than the depth of the second groove 61.

[0031] A drive shaft 11 is provided between the ratchet handle 3 and the handle 12. One end of the drive shaft 11 is inserted into the ratchet handle and meshes with the reverse drive crown gear 4 and the forward drive crown gear 5 respectively.

[0032] The ratchet handle 3 is provided with a second through hole 31, the drive shaft 11 is provided with a first groove 111, and the drive shaft stop block 15 passes through the second through hole 31 and engages with the first groove 111.

[0033] Rotating handle 12 drives drive shaft 11 to rotate. Drive shaft 11 meshes with reverse drive crown gear 4 and forward drive crown gear 5, thereby driving reverse drive crown gear 4 and forward drive crown gear 5 to rotate. Reverse drive crown gear 4 and forward drive crown gear 5 engage with rollers through friction, thereby driving the rollers to roll. The rollers rub against the ratchet head 2, thereby driving the ratchet head 2 to rotate. The tail 23 is hexagonal in shape, and the rollers are locked onto the three faces of the hexagon, thereby achieving locking. The friction between the rollers and the tail 23 drives the ratchet head 2 to rotate.

[0034] It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0035] It should be noted that when a component is referred to as "fixed on" or "set on" another component, it can be located directly on or indirectly on the other component. When a component is referred to as "connected to" another component, it can be directly connected to or indirectly connected to the other component.

[0036] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not indicate that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0037] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating relative importance or the number of technical features. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

Claims

1. A ratchet wrench characterized by: The utility model provides a kind of ratchet handle, including handle (12), the ratchet handle body (3) being connected with handle (12), the ratchet handle body (3) is equipped with ratchet head (2) and the reversing mechanism for changing the rotating direction of ratchet head (2) inside, reversing mechanism includes reversing knob (1), the support assembly for connecting reversing knob (1) and ratchet head (2), support assembly is equipped below reversing knob (1), ratchet head (2) is equipped below support assembly;Support assembly includes reversing support (16), several rollers, roller is equipped in reversing support (16), reversing support (16) is equipped between reversing knob (1) and ratchet head (2);Reversing support (16) is equipped with first clamping groove (161), second clamping groove (162), third clamping groove (163), roller includes first roller (7), second roller (8), third roller (9), first roller (7) is clamped in first clamping groove (161), second roller (8) is clamped in second clamping groove (162), third roller (9) is clamped in third clamping groove (163).

2. The ratchet wrench of claim 1, wherein: Support assembly further includes transmission crown gear set, transmission crown gear set includes reverse transmission crown gear (4) being equipped below reversing knob (1) and positive transmission crown gear (5) being equipped above ratchet head (2), the teeth of reverse transmission crown gear (4) and positive transmission crown gear (5) are oppositely arranged, reversing support (16) is equipped between positive transmission crown gear (5) and reverse transmission crown gear (4).

3. The ratchet wrench of claim 2, wherein: Ratchet head (2) includes ring part (22), head (21) and tail (23), positive transmission crown gear (5) is equipped on ring part (22), tail (23) is inserted into reversing support (16) through positive transmission crown gear (5), ring part (22), head (21), tail (23) are integrally formed.

4. The ratchet wrench of claim 1, wherein: Ratchet head (2) is also clamped with ratchet head stop ring (13), ratchet head stop ring (13) is equipped with opening (131), opening (131) is clamped with ratchet head (2).

5. The ratchet wrench according to claim 1 or 2 or 3 or 4, wherein: Ratchet handle body (3) is also equipped with quick release push rod (6), push rod spring (14) is equipped below quick release push rod (6), quick release push rod (6) is clamped on ratchet head (2) through reversing support (16).

6. The ratchet wrench of claim 5, wherein: Ratchet head (2) is equipped with first through hole (211), steel ball (10) is equipped in first through hole (211), second recess (61) and third recess (62) are equipped on quick release push rod (6), second recess (61) or third recess (62) is equipped in first through hole (211) through ratchet head (2), the depth of third recess (62) is greater than the depth of second recess (61).

7. The ratchet wrench according to claim 1 or 2 or 3 or 4 or 6, wherein: Transmission shaft (11) is equipped between ratchet handle body (3) and handle (12), one end of transmission shaft (11) is inserted into ratchet handle body (3) and is engaged with the gear of reverse transmission crown gear (4) and positive transmission crown gear (5) respectively.

8. The ratchet wrench of claim 7, wherein: Second through hole (31) is equipped on ratchet handle body (3), first recess (111) is equipped on transmission shaft (11), transmission shaft stop block (15) is clamped through second through hole (31) and first recess (111).

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