Ratchet wrench

Abstract

The utility model discloses a ratchet wrench belongs to ratchet wrench field, has solved the single function of existing electric ratchet wrench problem, the technical scheme of solving this problem mainly includes the casing, and the casing is equipped with motor assembly, transmission assembly and ratchet assembly, transmission assembly includes intermediate shaft, adjusting part, upper impact part and lower impact part, and the opposite side of upper impact part and lower impact part all is equipped with the tooth part, and intermediate shaft is elastically loaded and makes intermediate shaft drive upper impact part close to lower impact part, adjusting part has first position and second position, and the adjusting part under first position restricts the axial sliding distance of intermediate shaft to limit upper impact part and lower impact part each other close, and the adjusting part under second position removes the restriction to intermediate shaft to make upper impact part and lower impact part can each other close. The utility model mainly through adjusting part can realize the switching of ratchet wrench's impact mode and no impact mode.

Description

Technical Field

[0001] This utility model demonstrates a ratchet wrench, belonging to the technical field of ratchet wrenches. Background Technology

[0002] A ratchet wrench is a tool that automatically tightens or loosens screws using a motor, and is often used to tighten or loosen high-strength screws. The ratchet wrench uses a motor to drive an eccentric shaft to rotate around a central axis. The eccentric shaft outputs speed and torque to the ratchet, which in turn drives the ratchet to oscillate. The ratchet then drives the pawl to rotate the drive head, which outputs rotational force to tighten or loosen the screw.

[0003] Existing electric ratchet wrenches fall into two categories: one is a ratchet wrench without impact function, which is powered solely by a motor and lacks sufficient torque to loosen rusted fasteners, and cannot improve the tightness of fasteners during installation; the other is a ratchet wrench with impact function, which has an impact component inside the housing. During the transmission of power from the motor to the ratchet component, the impact component repeatedly provides impact force, thereby increasing the output torque of the ratchet wrench and enabling it to tighten or loosen fasteners more effectively and quickly. However, both types of ratchet wrenches have relatively limited functionality and are difficult to meet the needs of more complex and varied work scenarios. Utility Model Content

[0004] The purpose of this invention is to solve the problem of the limited functionality of existing electric ratchet wrenches. To this end, a ratchet wrench is provided that can switch between impact mode and non-impact mode through an adjustment component.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] A ratchet wrench includes a housing, which houses a motor assembly, a transmission assembly, and a ratchet assembly. The transmission assembly includes an intermediate shaft for transmitting power to the ratchet assembly, an adjusting member, an upper impact member, and a lower impact member. The upper impact member is fixed to the intermediate shaft, and the lower impact member is fixed inside the housing. The upper and lower impact members each have meshing teeth on opposite sides. The intermediate shaft is elastically loaded, causing it to move the upper impact member closer to the lower impact member. The adjusting member rotates with the intermediate shaft and slides axially with it. The adjusting member has a first position and a second position. In the first position, the adjusting member restricts the axial sliding distance of the intermediate shaft to limit the upper and lower impact members from approaching each other. In the second position, the adjusting member releases the restriction on the intermediate shaft, allowing the upper and lower impact members to approach each other.

[0007] The beneficial effects of using this utility model are:

[0008] In this invention, the upper impact member is fixed to the intermediate shaft, and the lower impact member is fixed inside the housing. Both the upper and lower impact members have teeth. The intermediate shaft is elastically loaded, causing it to tend to move axially. The adjusting member is connected to the intermediate shaft and can move axially with it. The adjusting member has a first position and a second position. When the adjusting member is in the first position, it axially limits the intermediate shaft, thus preventing the intermediate shaft from driving the upper impact member closer to the lower impact member. During rotation, the intermediate shaft drives the upper impact member to rotate, but the upper impact member does not contact the lower impact member. In this state, the intermediate shaft does not produce axial displacement during rotation. That is, when the adjusting member is in the first position, the ratchet wrench is in a non-impact mode. When the adjusting member is in the second position, it releases the restriction on the intermediate shaft. The intermediate shaft moves axially due to the elastic loading, causing the upper impact member to move closer to the lower impact member, and the teeth of the upper and lower impact members mesh with each other. During rotation, the intermediate shaft drives the upper impact member to rotate, and when the upper impact member rotates relative to the lower impact member, the two teeth interact with each other. The ratchet wrench is used to push the upper impact member away from the lower impact member. After the tips of the two teeth are offset, the intermediate shaft will continue to move the upper impact member closer to the lower impact member due to elastic loading. In this state, the upper and lower impact members will repeatedly engage and disengage during the rotation of the intermediate shaft. During the process of the upper impact member rotating from disengagement to engagement, the torque of the intermediate shaft will increase, thereby enabling faster and more effective tightening or loosening of fasteners. At this time, the ratchet wrench is in impact mode. This utility model can switch between impact mode and non-impact mode of the ratchet wrench by adjusting the first and second positions of the adjusting member. In normal use, the ratchet wrench can be switched to non-impact mode to reduce vibration and noise during use, which helps to improve the user experience. When it is necessary to improve the tightening or loosening efficiency of fasteners, the ratchet wrench can be switched to impact mode to improve the user's assembly and disassembly efficiency. The switching between the two modes can meet the different usage needs of users, thereby effectively improving the applicability of the ratchet wrench and providing users with a better user experience.

[0009] Preferably, both the lower impact member and the adjusting member have several protrusions on opposite sides, and these protrusions are spaced apart circumferentially. In the first position, the protrusions of the adjusting member abut against the protrusions of the lower impact member to restrict the intermediate shaft from driving the upper impact member closer to the lower impact member. In the second position, the protrusions of the adjusting member and the lower impact member are offset from each other to release the restriction on the intermediate shaft. Using the aforementioned technical solution, the teeth of the adjusting member and the lower impact member abut against each other, which can restrict the intermediate shaft from sliding towards the lower impact member, thereby restricting the upper impact member from approaching the lower impact member, thus achieving separation of the upper and lower impact members and ensuring that the intermediate shaft is not prone to axial sliding in the non-impact mode. When the adjusting member assembly is in the first position, the two protrusions are offset from each other, and the protrusion of the adjusting member will embed between two adjacent protrusions of the lower impact member, allowing the intermediate shaft to drive the upper impact member closer to the lower impact member, so that the upper and lower impact members can mesh with each other, thereby generating an impact effect during the rotation of the intermediate shaft.

[0010] Preferably, the upper impact member is positioned between the adjusting member and the lower impact member. The boss of the lower impact member forms a clearance groove for the upper impact member to extend into, and the teeth of the lower impact member are disposed on the groove wall opposite to the upper impact member. Using the aforementioned technical solution, when the teeth of the upper and lower impact members mesh, the upper impact member moves into the clearance groove of the lower impact member, making the fit between the upper and lower impact members tighter and reducing the space occupied by the upper and lower impact members.

[0011] Preferably, the intermediate shaft is provided with a positioning step, and the adjusting member is confined between the positioning step and the upper impact member to ensure axial positioning of the adjusting member and the intermediate shaft. By employing the aforementioned technical solution, the adjusting member is positioned by the positioning step and the upper impact member, ensuring that the adjusting member can slide axially with the intermediate shaft, thereby increasing the assembly stability of the adjusting member and the intermediate shaft.

[0012] Preferably, a bushing is fitted onto the intermediate shaft, the bushing being confined between the positioning step and the adjusting member. A plurality of ball bearings are movably disposed on the side of the bushing facing the adjusting member, and these ball bearings abut against the adjusting member. Using the aforementioned technical solution, the ball bearings can generate rolling friction with the adjusting member. During the rotation of the adjusting member relative to the intermediate shaft, the friction between the adjusting member and the bushing can be reduced, decreasing the wear on both the adjusting member and the bushing, and helping to extend the service life of both.

[0013] Preferably, the adjusting component is connected to a push button, and the outer periphery of the adjusting component is provided with an outwardly protruding push rod. The housing is provided with a sliding groove, and the push button is connected to the push rod and slidably installed in the sliding groove. The push button slides along the sliding groove to drive the adjusting component to switch between a first position and a second position. By adopting the aforementioned technical solution, controlling the rotation of the adjusting component through the push button makes the position switching of the adjusting component more convenient and quick, and helps to reduce the difficulty of operating the adjusting component.

[0014] Preferably, the slide is equipped with a limiting baffle, with a first limiting groove and a second limiting groove formed on both sides of the limiting baffle. The push rod passes over the limiting baffle and enters the first limiting groove or the second limiting groove to switch the adjusting member between the first position and the second position. Using the aforementioned technical solution, the limiting baffle can separate the first position and the second position of the adjusting member, preventing the adjusting member from arbitrarily disengaging from the first or second position, ensuring that the impact mode or non-impact mode can be stably maintained, preventing damage to the internal structure due to arbitrary mode switching, and making the engagement of the ratchet wrench's internal structure more stable and reliable.

[0015] Preferably, the adjusting member is also connected to an elastic member, which is arranged in a ring shape, with one end of the elastic member positioned inside the housing and the other end positioned in the adjusting member.

[0016] Preferably, the push button is provided with a positioning groove into which the push rod extends. The push button rotates the adjusting component through the cooperation of the positioning groove and the push rod. The width of the positioning groove in the circumferential direction is greater than the width of the push rod in the circumferential direction, and the width of the positioning groove in the axial direction is greater than the axial sliding distance of the intermediate shaft. Using the aforementioned technical solution, when the adjusting component is in the second position, it moves axially with the intermediate shaft. The push button engages with the push rod of the adjusting component through the positioning groove, and the axial extension distance of the positioning groove is greater than the axial sliding distance of the push rod, which can prevent the push button from reciprocating with the push rod and ensure the stability of the fit between the push button and the housing.

[0017] Preferably, the slide groove is provided with a positioning groove, and the push button is provided with a positioning protrusion that matches the positioning groove. When the adjusting member is in the second position, the positioning protrusion extends into the positioning groove to increase the resistance of the push button sliding axially. By adopting the aforementioned technical solution, the cooperation between the positioning protrusion and the positioning groove further improves the positioning stability of the push button and prevents the adjusting member from driving the push button to slide axially through the push rod.

[0018] Preferably, the housing is provided with a reset member, which acts on the intermediate shaft to make the intermediate shaft drive the upper impact member closer to the lower impact member, and the positioning groove has an opening in the direction away from the lower impact member of the intermediate shaft.

[0019] Preferably, the motor assembly includes a drive motor and a reducer. The reducer includes a planetary carrier. The ratchet assembly includes a drive shaft. The two ends of the intermediate shaft are respectively anti-rotationally engaged with the planetary carrier and the drive shaft. A reset member is provided inside the housing. The reset member acts on the intermediate shaft to make the intermediate shaft tend to slide toward the planetary carrier. The upper impact member is closer to the drive shaft than the lower impact member. Alternatively, the reset member acts on the intermediate shaft to make the intermediate shaft tend to slide toward the drive shaft. The upper impact member is closer to the planetary carrier than the lower impact member.

[0020] Other features and advantages of this utility model will be disclosed in detail in the following specific embodiments and accompanying drawings. Attached Figure Description

[0021] The present invention will be further described below with reference to the accompanying drawings:

[0022] Figure 1 is an exploded view of the ratchet wrench of this utility model;

[0023] Figure 2 is a front view of the ratchet wrench of this utility model in non-impact mode;

[0024] Figure 3 is a cross-sectional view of the ratchet wrench of this utility model in non-impact mode;

[0025] Figure 4 is a cross-sectional view of the ratchet wrench of this utility model in non-impact mode.

[0026] Figure 5 is a partial structural diagram of the ratchet wrench of this utility model in non-impact mode;

[0027] Figure 6 is a front view of the ratchet wrench of this utility model in impact mode;

[0028] Figure 7 is a cross-sectional view of the ratchet wrench of this utility model in impact mode;

[0029] Figure 8 is a magnified view of part A in Figure 7;

[0030] Figure 9 is a cross-sectional view of the ratchet wrench of this utility model in impact mode;

[0031] Figure 10 is a partial structural diagram of the ratchet wrench of this utility model in impact mode;

[0032] Figure 11 is an exploded view of the transmission assembly in the ratchet wrench of this utility model;

[0033] Figure 12 shows a schematic diagram of the push button in the ratchet wrench of this utility model.

[0034] Reference numerals: 1. Housing; 11. Slide groove; 111. First limiting groove; 112. Second limiting groove; 113. Limiting baffle; 114. Positioning groove; 12. Fixed seat; 121. Fixed plate; 122. Fastener; 2. Drive motor; 21. Output shaft; 22. Reducer; 221. Planetary carrier; 3. Ratchet assembly; 31. Drive shaft; 4. Intermediate shaft; 41. Stepped part; 42. Reset part; 51. Adjusting part; 511. Push rod; 512. First boss; 52. Upper impact part; 521. First tooth; 53. Lower impact part; 531. Second boss; 532. Second tooth; 54. Bushing; 541. Ball; 55. Push button; 551. Positioning protrusion; 552. Positioning groove; 56. Elastic element. Detailed Implementation

[0035] The technical solutions of the present utility model will be explained and described below with reference to the accompanying drawings. However, the following embodiments are only preferred embodiments of the present utility model and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments in the implementation methods without creative effort are all within the protection scope of the present utility model.

[0036] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", etc., 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 simplifying the description, and do not indicate or imply that the device or element referred to 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] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0038] As shown in Figures 1 to 12, this embodiment illustrates a ratchet wrench, including a housing 1. The housing 1 is provided with a motor assembly, a transmission assembly, and a ratchet assembly 3. The transmission assembly includes an intermediate shaft 4 for transmitting power to the ratchet assembly 3, an adjusting member 51, an upper impact member 52, and a lower impact member 53. The upper impact member 52 is fixed to the intermediate shaft 4, and the lower impact member 53 is fixed inside the housing 1. The upper impact member 52 and the lower impact member 53 are provided with meshing teeth on opposite sides. The intermediate shaft 4 is elastically loaded, causing the intermediate shaft 4 to drive the upper impact member 52 closer to the lower impact member 53. The adjusting member 51 rotates with the intermediate shaft 4 and slides axially with the intermediate shaft 4. The adjusting member 51 has a first position and a second position. In the first position, the adjusting member 51 restricts the axial sliding distance of the intermediate shaft 4 to limit the upper impact member 52 and the lower impact member 53 from getting closer to each other. In the second position, the adjusting member 51 releases the restriction on the intermediate shaft 4, allowing the upper impact member 52 and the lower impact member 53 to get closer to each other.

[0039] In this embodiment, the upper impact member 52 is fixed to the intermediate shaft 4, and the lower impact member 53 is fixed inside the housing 1. Both the upper impact member 52 and the lower impact member 53 have teeth. The intermediate shaft 4 is elastically loaded, causing it to have a tendency to move axially. The adjusting member 51 is connected to the intermediate shaft 4 and can move axially with the intermediate shaft 4. The adjusting member 51 has a first position and a second position. When the adjusting member 51 is in the first position, it forms an axial limit on the intermediate shaft 4, thereby restricting the intermediate shaft 4 from driving the upper impact member 52 closer to the lower impact member 53. During the rotation of the intermediate shaft 4, the upper impact member 52 rotates. During the rotation of the upper impact member 52, it does not contact the lower impact member 53. In this state, the intermediate shaft 4 does not undergo axial displacement during rotation. That is, when the adjusting member 51 is in the first position, the ratchet wrench is in a non-impact mode. However, when the adjusting member 51 is in the second position, it releases the restriction on the intermediate shaft 4. The intermediate shaft 4 moves axially due to elastic loading, causing the upper impact member 52 to move closer to the lower impact member 53. This causes the teeth of the upper impact member 52 to mesh with the teeth of the lower impact member 53. During the rotation of the intermediate shaft 4, the upper impact member 52 rotates, and the upper impact member 52... When the lower impact member 53 rotates, the interaction of the two teeth pushes the upper impact member 52 away from the lower impact member 53. After the tips of the two teeth are misaligned, the intermediate shaft 4 will cause the upper impact member 52 to continue to move closer to the lower impact member 53 due to elastic loading. In this state, during the rotation of the intermediate shaft 4, the upper impact member 52 and the lower impact member 53 will repeatedly engage and disengage. During the process of the upper impact member 52 rotating from disengagement to engagement, the torque of the intermediate shaft 4 will increase, thereby enabling the fastener 122 to be locked or loosened more effectively and quickly. At this time, the ratchet wrench is in impact mode. This embodiment adjusts... Switching between the first and second positions of component 51 allows for switching between the impact mode and the non-impact mode of the ratchet wrench. During normal use, switching to the non-impact mode reduces vibration and noise, improving the user experience. When it is necessary to increase the efficiency of tightening or loosening fasteners 122, the ratchet wrench can be switched to impact mode, thereby improving assembly and disassembly efficiency. Switching between the two modes can meet different user needs, effectively expanding the applicability of the ratchet wrench and providing a better user experience.

[0040] As shown in Figure 1, the housing 1 in this embodiment is provided with a drive assembly, a transmission assembly, and a ratchet assembly 3. The drive assembly includes a drive motor 2 and a reducer 22. The reducer 22 includes a planetary gear, a ring gear, and a planet carrier 221. The output shaft 21 of the drive motor 2 is provided with a sun gear. The planetary gear is fitted with both the sun gear and the ring gear. The planetary gear is mounted on the planet carrier 221. The transmission assembly includes an intermediate shaft 4, an adjusting member 51, an upper impact member 52, and a lower impact member 53. The ratchet assembly 3 includes a transmission shaft 31. The two ends of the intermediate shaft 4 are respectively anti-rotationally engaged with the planet carrier 221 and the transmission shaft 31, and the intermediate shaft 4 can slide axially. After the drive motor 2 is started, the output shaft 21 drives the planetary gear to rotate in the ring gear through the sun gear. During the rotation of the planetary gear, it drives the planet carrier 221 to rotate. The planet carrier 221 drives the transmission shaft 31 to rotate through the intermediate shaft 4. The transmission shaft 31 drives the working head of the ratchet assembly 3 to run, so as to tighten or loosen the bolt.

[0041] As shown in Figure 11, in this embodiment, a fixed base 12 is fixed inside the housing 1. The lower impact member 53 is fixed to the fixed base 12. The intermediate shaft 4 passes through the lower impact member 53 and does not contact the lower impact member 53. The upper impact member 52 is fixed to the intermediate shaft 4 so that the upper impact member 52 moves synchronously with the intermediate shaft 4. The upper impact member 52 and the lower impact member 53 are provided with meshing teeth on opposite sides. A reset member 42 is provided inside the housing 1. The reset member 42 is located between the intermediate shaft 4 and the transmission shaft 31. The reset member 42 acts on the intermediate shaft 4 so that the intermediate shaft 4 faces the planetary carrier 221. Due to the sliding tendency, the upper impact member 52 is closer to the drive shaft 31 than the lower impact member 53. Therefore, under the action of the reset member 42, the intermediate shaft 4 will drive the upper impact member 52 closer to the lower impact member 53. Of course, it can be understood that in other embodiments, the reset member 42 may also be located between the intermediate shaft 4 and the planet carrier 221. The reset member 42 acts on the intermediate shaft 4 to make the intermediate shaft 4 have a tendency to slide towards the drive shaft 31. The upper impact member 52 is closer to the planet carrier 221 than the lower impact member 53. Therefore, under the action of the reset member 42, the intermediate shaft 4 will drive the upper impact member 52 closer to the lower impact member 53.

[0042] As shown in Figure 11, in this embodiment, the intermediate shaft 4 is sequentially provided with a lower impact member 53, an upper impact member 52, and an adjusting member 51 along the direction from the planetary carrier 221 to the transmission shaft 31. Specifically, the upper impact member 52 is located between the adjusting member 51 and the lower impact member 53. The adjusting member 51 and the lower impact member 53 each have several protrusions on opposite sides, and these protrusions are spaced circumferentially, forming a gap between adjacent protrusions. The width of the gap is greater than the width of the protrusion, thus ensuring that the protrusion can extend into the gap. The protrusion of the adjusting member 51 is the first protrusion 512, and the protrusion of the lower impact member 53 is the second protrusion 531. In the first position, the adjusting member 5... The first boss 512 of 1 abuts against the second boss 531 of the lower impact member 53. Since the adjusting member 51 moves axially along the intermediate shaft 4, the intermediate shaft 4 cannot continue to move towards the planetary carrier 221 under the restriction of the adjusting member 51 and the lower impact member 53. This restricts the intermediate shaft 4 from driving the upper impact member 52 to approach the lower impact member 53, so as to separate the upper impact member 52 and the lower impact member 53. At this time, the ratchet wrench is in the non-impact mode. During the rotation of the intermediate shaft 4, the upper impact member 52 rotates with the intermediate shaft 4, and the upper impact member 52 and the lower impact member 53 do not come into contact, ensuring that the intermediate shaft 4 is not prone to axial sliding in the non-impact mode.

[0043] When the adjusting member 51 is in the second position, the first boss 512 of the adjusting member 51 and the second boss 531 of the lower impact member 53 are offset from each other, that is, the gap between the first boss 512 and the two second bosses 531 are aligned. Under the action of the resetting member 42, the intermediate shaft 4 will slide towards the planetary carrier 221 so that the first boss 512 can extend into the gap between the two second bosses 531, thereby reducing the distance between the adjusting member 51 and the lower impact member 53. During the process of the adjusting member 51 sliding towards the lower impact member 53, the intermediate shaft 4 will also drive the upper impact member 52 to move closer to the lower impact member 53 so that the first tooth 521 of the upper impact member 52 meshes with the second tooth 532 of the lower impact member 53. At this time, the ratchet wrench is in the impact mode. During the rotation of the intermediate shaft 4, the upper impact member 52 moves with the intermediate shaft 4. When the upper impact member 52 rotates, the interaction between the first tooth 521 and the second tooth 532 will push the upper impact member 52 away from the lower impact member 53. When the tips of the first tooth 521 and the second tooth 532 abut together, the upper impact member 52 slides the maximum distance relative to the lower impact member 53. After that, when the tips of the first tooth 521 and the second tooth 532 are misaligned, the intermediate shaft 4 will drive the upper impact member 52 to continue to approach the lower impact member 53 due to elastic loading. In this state, during the rotation of the intermediate shaft 4, the upper impact member 52 and the lower impact member 53 will repeatedly engage and disengage to generate an impact effect during the rotation of the intermediate shaft 4. During the process of the upper impact member 52 rotating from disengagement to engagement, the torque of the intermediate shaft 4 will increase, thereby enabling the fastener 122 to be locked or loosened more effectively and quickly.

[0044] To make the assembly of the transmission components more compact, in this embodiment, the boss of the lower impact member 53 is provided to form a clearance groove for the upper impact member 52 to extend into. The second tooth 532 of the lower impact member 53 is provided in the groove wall opposite to the upper impact member 52. When the teeth of the upper impact member 52 and the lower impact member 53 mesh, the upper impact member 52 will move into the clearance groove of the lower impact member 53, making the fit between the upper impact member 52 and the lower impact member 53 more compact and reducing the space occupied by the upper impact member 52 and the lower impact member 53.

[0045] As shown in Figure 8, the intermediate shaft 4 in this embodiment is provided with a positioning step, and a bushing 54 is fitted on the intermediate shaft 4. The bushing 54 and the adjusting member 51 are restricted between the positioning step and the upper impact member 52 to achieve axial positioning of the adjusting member 51 and the intermediate shaft 4. A plurality of balls 541 are movably arranged on the side of the bushing 54 facing the adjusting member 51. The balls 541 abut against the adjusting member 51, and the balls 541 can form rolling friction with the adjusting member 51. During the rotation of the adjusting member 51 relative to the intermediate shaft 4, the friction between the adjusting member 51 and the bushing 54 can be reduced, the wear of the adjusting member 51 and the bushing 54 can be reduced, and the service life of the adjusting member 51 and the bushing 54 can be extended. In addition, the positioning step and the upper impact member 52 form a positioning for the adjusting member 51, ensuring that the adjusting member 51 can slide axially with the intermediate shaft 4, thereby increasing the assembly stability of the adjusting member 51 and the intermediate shaft 4.

[0046] As shown in Figures 4 and 9, in this embodiment, the adjusting component is connected to a push button 55. The adjusting component 51 is generally annular and is fitted onto the intermediate shaft 4. The adjusting component 51 can rotate around the intermediate shaft 4. The outer periphery of the adjusting component 51 is provided with an outwardly protruding push rod 511. The housing 1 is provided with a sliding groove 11. The push button 55 is connected to the push rod 511 and slidably installed in the sliding groove 11. The side of the push button 55 facing the adjusting component 51 is provided with a positioning groove 552 for the push rod 511 to extend into. The push button 55 cooperates with the push rod 511 of the adjusting component 51 through the positioning groove 552 to drive the adjusting component 51 to rotate. The push button 55 slides along the sliding groove 11 to drive the adjusting component 51 to switch between a first position and a second position. Controlling the rotation of the adjusting component 51 by the push button 55 makes the position switching of the adjusting component 51 more convenient and faster, and helps to reduce the difficulty of operating the adjusting component 51.

[0047] As shown in Figure 12, in this embodiment, the push button 55 has three limiting plates on the side facing the adjusting member 51, and a positioning groove 552 is formed between the three limiting plates. When the push rod 511 extends into the positioning groove 552, two of the limiting plates are located on both sides of the push rod 511. When the push button 55 slides along the slide groove 11, the limiting plates will abut against the push rod 511, thereby driving the push rod 511 to rotate circumferentially. The other limiting plate is located on the side of the push rod 511 facing the planetary carrier 221. Under the action of the reset member 42, the intermediate shaft 4 will move towards the planetary carrier 221. At this time, the push rod 511 will abut against the limiting plate, thereby preventing the push rod 511 from moving. When the adjusting member 51 is in the second position after disengaging from the positioning groove 552, it will move axially with the intermediate shaft 4. The positioning groove 552 has an opening in the direction away from the lower impact member 53 of the intermediate shaft 4, which can prevent the push button 55 from sliding back and forth with the push rod 511 and ensure the stability of the push button 55 in conjunction with the housing 1. Of course, it can be understood that in other embodiments, the positioning groove 552 can also be closed in the axial direction of the intermediate shaft 4. The distance that the positioning groove 552 extends in the axial direction is greater than the axial sliding distance of the intermediate shaft 4, which can prevent the push button 55 from sliding back and forth with the push rod 511.

[0048] As shown in Figures 5 and 10, the slide 11 in this embodiment is provided with a limiting baffle 113. A first limiting groove 111 and a second limiting groove 112 are formed on both sides of the limiting baffle 113. When the push rod 511 of the adjusting member 51 is in the first limiting groove 111, the adjusting member 51 rotates to the first position. When the push rod 511 of the adjusting member 51 is in the second limiting groove 112, the adjusting member 51 rotates to the second position. The push rod 511 passes through the limiting baffle 113 and enters the first limiting groove 111 or the second limiting groove 112, so as to realize the switching of the adjusting member 51 between the first position and the second position. The limiting baffle 113 can separate the first position and the second position of the adjusting member 51, prevent the adjusting member 51 from arbitrarily leaving the first position or the second position, ensure that the impact mode or the non-impact mode can be stably maintained, prevent damage to the internal structure due to arbitrary switching of modes, and make the cooperation of the internal structure of the ratchet wrench more stable and reliable.

[0049] It should be noted that there is a gap between the limiting baffle 113 and the slide groove 11, allowing the push rod 511 to pass over the limiting baffle 113. This gap is located on the side of the slide groove 11 closer to the ratchet assembly 3. Since the intermediate shaft 4 is elastically loaded by the reset member 42, the intermediate shaft 4 has a tendency to slide away from the ratchet assembly 3. That is, without the action of external force, the push rod 511 is not easy to pass over the limiting baffle 113, thus preventing the adjusting member 51 from arbitrarily disengaging from the first or second position. In the manual mode, the push button 55 needs to be pushed towards the ratchet assembly 3 first, so that the push rod 511 and the gap are close together. After aligning the gap, push the push button 55 to rotate axially along the slide groove 11, thereby passing the limit baffle 113. Finally, release the push button 55, and the intermediate shaft 4 will automatically move away from the ratchet assembly 3 under the action of the reset member 42, so that the adjusting member 51 is away from the gap, thereby realizing the mode switching of the ratchet wrench. In addition, the adjusting member 51 in this embodiment is also connected to the elastic member 56. The elastic member 56 is distributed in a ring on the outer periphery of the bushing 54. The fixing plate 121 is fixed on the fixing seat 12 by fasteners 122. One end of the elastic member 56 is positioned on the fixing plate 121, and the other end is positioned on the adjusting member 51.

[0050] As shown in Figure 6, in this embodiment, the slide groove 11 is provided with a positioning groove 114, and the push button 55 is provided with a positioning protrusion 551 that matches the positioning groove 114. When the adjusting member 51 is in the second position, the positioning protrusion 551 extends into the positioning groove 114 to increase the resistance of the push button 55 sliding axially. The cooperation between the positioning protrusion 551 and the positioning groove 114 further improves the positioning stability of the push button 55 and prevents the adjusting member 51 from driving the push button 55 to slide axially through the push rod 511.

[0051] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Those skilled in the art should understand that this utility model includes, but is not limited to, the content described in the accompanying drawings and the specific embodiments above. Any modifications that do not depart from the functional and structural principles of this utility model will be included within the scope of the claims.

Claims

1. A ratchet wrench, comprising a housing (1), the housing (1) being provided with a motor assembly, a transmission assembly, and a ratchet assembly (3), characterized in that, The transmission assembly includes an intermediate shaft (4) for transmitting power to the ratchet assembly (3), an adjusting member (51), an upper impact member (52), and a lower impact member (53). The upper impact member (52) is fixed to the intermediate shaft (4), and the lower impact member (53) is fixed inside the housing (1). The upper impact member (52) and the lower impact member (53) are provided with meshing teeth on opposite sides. The intermediate shaft (4) is elastically loaded, causing the intermediate shaft (4) to drive the upper impact member (52) closer to the lower impact member (53). The adjusting member (51) rotates with the intermediate shaft (4) and slides axially with the intermediate shaft (4). The adjusting member (51) has a first position and a second position. The adjusting member (51) in the first position restricts the axial sliding distance of the intermediate shaft (4) to limit the upper impact member (52) and the lower impact member (53) from getting closer to each other. The adjusting member (51) in the second position releases the restriction on the intermediate shaft (4) so ​​that the upper impact member (52) and the lower impact member (53) can get closer to each other.

2. A ratchet wrench according to claim 1, characterized in that, The lower impact member (53) and the adjusting member (51) are provided with several protrusions on opposite sides, and the protrusions are distributed circumferentially. In the first position, the protrusion of the adjusting member (51) abuts against the protrusion of the lower impact member (53) to restrict the intermediate shaft (4) from driving the upper impact member (52) to approach the lower impact member (53). In the second position, the protrusion of the adjusting member (51) and the protrusion of the lower impact member (53) are staggered to release the restriction on the intermediate shaft (4).

3. A ratchet wrench according to claim 2, characterized in that, The upper impact member (52) is located between the adjusting member (51) and the lower impact member (53). The boss of the lower impact member (53) forms a relief groove for the upper impact member (52) to extend into. The teeth of the lower impact member (53) are provided on the groove wall opposite to the upper impact member (52).

4. A ratchet wrench according to claim 1, characterized in that, The intermediate shaft (4) is provided with a positioning step, and the adjusting member (51) is restricted between the positioning step and the upper impact member (52) so as to axially position the adjusting member (51) and the intermediate shaft (4).

5. A ratchet wrench according to claim 4, characterized in that, A bushing (54) is fitted on the intermediate shaft (4). The bushing (54) is restricted between the positioning step and the adjusting member (51). Several balls (541) are movably provided on the side of the bushing (54) facing the adjusting member (51). The balls (541) abut against the adjusting member (51).

6. A ratchet wrench according to claim 1, characterized in that, The adjusting component (51) is connected to a push button (55). The outer periphery of the adjusting component (51) is provided with an outwardly protruding push rod (511). The housing (1) is provided with a slide groove (11). The push button (55) is connected to the push rod (511) and slidably installed in the slide groove (11). The push button (55) slides along the slide groove (11) to drive the adjusting component (51) to switch between the first position and the second position.

7. A ratchet wrench according to claim 6, characterized in that, The slide (11) is provided with a limiting baffle (113), and a first limiting groove (111) and a second limiting groove (112) are formed on both sides of the limiting baffle (113). The push rod (511) passes over the limiting baffle (113) and enters the first limiting groove (111) or the second limiting groove (112) to realize the switching of the adjusting member (51) between the first position and the second position.

8. A ratchet wrench according to claim 6, characterized in that, The adjusting member (51) is also connected to an elastic member (56). The elastic member (56) is arranged in a ring. One end of the elastic member (56) is located inside the housing (1), and the other end is located on the adjusting member (51).

9. A ratchet wrench according to claim 6, characterized in that, The push button (55) is provided with a positioning groove (552) into which the push rod (511) extends. The push button (55) pushes the adjusting member (51) to rotate through the cooperation of the positioning groove (552) and the push rod (511). The width of the positioning groove (552) in the circumferential direction is greater than the width of the push rod (511) in the circumferential direction, and the width of the positioning groove (552) in the axial direction is greater than the axial sliding distance of the intermediate shaft (4).

10. A ratchet wrench according to claim 9, characterized in that, The slide (11) is provided with a positioning groove (114), and the push button (55) is provided with a positioning protrusion (551) that matches the positioning groove (114). When the adjusting member (51) is in the second position, the positioning protrusion (551) extends into the positioning groove (114) to increase the resistance of the push button (55) sliding along the axial direction.

11. A ratchet wrench according to claim 9, characterized in that, The housing (1) is provided with a reset member (42), which acts on the intermediate shaft (4) to make the intermediate shaft (4) drive the upper impact member (52) to approach the lower impact member (53). The positioning groove (552) has an opening in the direction away from the lower impact member (53) of the intermediate shaft (4).

12. A ratchet wrench according to claim 1, characterized in that, The motor assembly includes a drive motor (2) and a reducer (22). The reducer (22) includes a planetary carrier (221). The ratchet assembly (3) includes a drive shaft (31). The two ends of the intermediate shaft (4) are respectively engaged with the planetary carrier (221) and the drive shaft (31) to prevent rotation. The housing (1) is provided with a reset member (42). The reset member (42) acts on the intermediate shaft (4) to make the intermediate shaft (4) tend to slide toward the planetary carrier (221). The upper impact member (52) is closer to the drive shaft (31) than the lower impact member (53). Alternatively, the reset member (42) acts on the intermediate shaft (4) to make the intermediate shaft (4) tend to slide toward the drive shaft (31). The upper impact member (52) is closer to the planetary carrier (221) than the lower impact member (53).

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