Ratchet wrench

Abstract

The invention discloses a ratchet wrench, belongs to the field of ratchet wrenches, solves the problem that an existing electric ratchet wrench is single in function, and adopts the technical scheme that the ratchet wrench mainly comprises a machine shell, the machine shell is provided with a motor assembly, a transmission assembly and a ratchet assembly, and the transmission assembly comprises a middle shaft, an adjusting part, an upper impact part and a lower impact part; the opposite sides of the upper impact piece and the lower impact piece are provided with tooth parts, the middle shaft is elastically loaded to drive the upper impact piece to be close to the lower impact piece, the adjusting piece is provided with a first position and a second position, and the adjusting piece at the first position limits the axial sliding distance of the middle shaft so as to limit the upper impact piece and the lower impact piece to be close to each other. And the adjusting piece at the second position relieves the limitation on the intermediate shaft, so that the upper impact piece and the lower impact piece can be close to each other. Switching between the impact mode and the impact-free mode of the ratchet wrench can be achieved mainly through the adjusting piece.

Description

Technical Field

[0001] The invention discloses a ratchet wrench, belonging to the technical field of ratchet wrenches. Background Art

[0002] A ratchet wrench is a tool that automatically loosens and tightens screws using a motor. It is commonly used for loosening and tightening high-strength screws. The motor drives the eccentric shaft to rotate around its central axis. The eccentric shaft transmits speed and torque to the ratchet, which in turn drives the ratchet to swing. The ratchet drives the pawl, which rotates the drive head, which then outputs the rotational driving force outward through the drive head to loosen or tighten the screw.

[0003] There are two types of existing electric ratchet wrenches. One is a ratchet wrench without impact function. This type of ratchet wrench is powered only by a motor. When encountering rusted fasteners, there is not enough torque to loosen the fasteners, and the tightening degree of the fasteners cannot be increased when installing the fasteners. The other is a ratchet wrench with impact function. An impact component is provided in the casing. During the process of the motor transmitting power to the ratchet component, the impact component will repeatedly provide impact force, thereby increasing the torque output by the ratchet wrench, so that the ratchet wrench can tighten or loosen the fasteners more effectively and quickly. However, the functions of the above two ratchet wrenches are relatively single, and it is difficult to meet more complex and changeable working scenarios. Summary of the Invention

[0004] The purpose of the present invention is to solve the problem of single function of existing electric ratchet wrenches. To this end, a ratchet wrench is provided, which can realize switching between impact mode and non-impact mode of the ratchet wrench through an adjusting member.

[0005] To solve the above technical problems, the present invention adopts the following technical solutions: A ratchet wrench includes a casing, which is provided with 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 in the casing. The upper impact member and the lower impact member are provided with mutually meshing teeth on opposite sides. The intermediate shaft is elastically loaded so that the intermediate shaft drives the upper impact member to approach the lower impact member. The adjusting member rotates in cooperation with the intermediate shaft and slides axially with the intermediate shaft. The adjusting member has a first position and a second position. The adjusting member in the first position limits the axial sliding distance of the intermediate shaft to limit the upper impact member and the lower impact member from approaching each other. The adjusting member in the second position releases the restriction on the intermediate shaft so that the upper impact member and the lower impact member can approach each other.

[0006] The beneficial effects of the present invention are: The upper impact piece is fixed to the intermediate shaft, and the lower impact piece is fixed in the casing. Both the upper impact piece and the lower impact piece have teeth. The intermediate shaft is elastically loaded so that the intermediate shaft has a tendency to move axially. The adjusting piece is connected to the intermediate shaft and can move axially with the intermediate shaft. The adjusting piece has a first position and a second position. When the adjusting piece is in the first position, the adjusting piece forms an axial limit on the intermediate shaft, thereby limiting the intermediate shaft from driving the upper impact piece close to the lower impact piece. During the rotation process, the intermediate shaft drives the upper impact piece to rotate, and the upper impact piece does not contact the lower impact piece during the rotation process. In this state, the intermediate shaft does not produce axial displacement during the rotation process, that is, when the adjusting piece is in the first position, the ratchet wrench is in a non-impact mode; and when the adjusting piece is in the second position, the adjusting piece releases the restriction on the intermediate shaft, and the intermediate shaft moves axially due to being elastically loaded. The intermediate shaft will drive the upper impact piece close to the lower impact piece and make the teeth of the upper impact piece mesh with the teeth of the lower impact piece. During the rotation process, the intermediate shaft drives the upper impact piece to rotate, and when the upper impact piece rotates relative to the lower impact piece, the two teeth interact with each other. The upper impact piece will be pushed away from the lower impact piece. After rotating until the tips of the two teeth are staggered with each other, the intermediate shaft will drive the upper impact piece to continue to approach the lower impact piece due to elastic loading. In this state, during the rotation of the intermediate shaft, the upper impact piece and the lower impact piece will repeatedly engage and disengage. During the process of the upper impact piece rotating from disengagement to engagement, the torque of the intermediate shaft will be increased, thereby enabling the fastener to be locked or loosened more effectively and quickly. At this time, the ratchet wrench is in impact mode; the present invention can realize the switching of the ratchet wrench between the impact mode and the non-impact mode by switching the first position and the second position of the adjusting piece. During normal use, the ratchet wrench is switched to the non-impact mode, which can reduce vibration during use and reduce the noise of the ratchet wrench, thereby helping to improve the user's experience; and when it is necessary to improve the locking or loosening efficiency of the fastener, the ratchet wrench can be switched to the impact mode, thereby improving the user's assembly and disassembly efficiency; the switching of the two modes can meet the different usage needs of the user, thereby effectively improving the applicability of the ratchet wrench and giving the user a better usage experience.

[0007] Preferably, the lower impact member and the adjusting member are each provided with a plurality of bosses on opposite sides thereof, and the bosses are spaced circumferentially. In the first position, the bosses of the adjusting member abut against the bosses of the lower impact member, thereby limiting the intermediate shaft from driving the upper impact member toward the lower impact member. In the second position, the bosses of the adjusting member and the bosses of the lower impact member are offset from each other, thereby releasing the restriction on the intermediate shaft. With the aforementioned technical solution, the teeth of the adjusting member and the lower impact member abut against each other, thereby limiting the intermediate shaft from sliding toward the lower impact member, thereby limiting the upper impact member from approaching the lower impact member, thereby separating the upper impact member from the lower impact member, and ensuring that the intermediate shaft is not susceptible to axial sliding in the non-impact mode. When the adjusting member assembly is in the first position, the two bosses are offset from each other, and the boss of the adjusting member is embedded between two adjacent bosses of the lower impact member, allowing the intermediate shaft to drive the upper impact member toward the lower impact member, thereby enabling the upper impact member and the lower impact member to engage with each other, thereby generating an impact effect during the rotation of the intermediate shaft.

[0008] Preferably, the upper impact member is positioned between the adjustment member and the lower impact member, the boss of the lower impact member is surrounded by a clearance groove into which the upper impact member extends, and the teeth of the lower impact member are disposed on the groove wall opposite the upper impact member. With the aforementioned technical solution, when the teeth of the upper and lower impact members engage, the upper impact member moves into the clearance groove of the lower impact member, thereby tightening the fit between the upper and lower impact members and reducing the space occupied by the upper and lower impact members.

[0009] Preferably, the intermediate shaft is provided with a positioning step, and the adjusting member is constrained between the positioning step and the upper impact member to ensure axial positioning of the adjusting member and the intermediate shaft. With the aforementioned technical solution, the positioning step and the upper impact member position the adjusting 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.

[0010] Preferably, the intermediate shaft is fitted with a sleeve, which is constrained between the positioning step and the adjusting member. A plurality of balls are movably mounted on the sleeve on the side of the sleeve that faces the adjusting member, and the balls abut against the adjusting member. With this technical solution, the balls create rolling friction with the adjusting member, reducing friction between the adjusting member and the sleeve during rotation of the adjusting member relative to the intermediate shaft, thereby reducing wear on the adjusting member and the sleeve, and thus extending the service life of the adjusting member and the sleeve.

[0011] Preferably, the adjusting member is connected to a push button, and a push rod protruding outwardly is provided on the outer periphery of the adjusting member. The housing is provided with a slide groove, and the push button is connected to the push rod and slidably mounted in the slide groove. The push button slides along the slide groove to drive the adjusting member to switch between the first position and the second position. Using the above technical solution, the adjustment member can be rotated by the push button, making the position switching of the adjustment member more convenient and faster, thereby helping to reduce the difficulty of operating the adjustment member.

[0012] Preferably, the slide is provided with a limit baffle, with a first limit slot and a second limit slot formed on either side of the limit baffle, respectively. The push rod passes over the limit baffle and enters the first limit slot or the second limit slot to switch the adjusting member between the first position and the second position. Using the aforementioned technical solution, the limit baffle can separate the first and second positions of the adjusting member, preventing the adjusting member from arbitrarily leaving the first or second position, ensuring that the impact mode or the non-impact mode can be stably maintained, preventing damage to the internal structure caused by arbitrary mode switching, and making the internal structure of the ratchet wrench more stable and reliable.

[0013] Preferably, the adjusting member is further connected to an elastic member, which is distributed in a ring shape, with one end of the elastic member positioned in the housing and the other end positioned on the adjusting member.

[0014] Preferably, the push button is provided with a positioning slot into which the push rod extends. The push button rotates the adjusting member through the cooperation of the positioning slot and the push rod. The circumferential width of the positioning slot is greater than the circumferential width of the push rod, and the axial width of the positioning slot is greater than the axial sliding distance of the intermediate shaft. Using the aforementioned technical solution, when the adjusting member is in the second position, the adjusting member moves axially with the intermediate shaft. The push button engages with the adjusting member's push rod through the positioning slot, and the axial extension of the positioning slot is greater than the axial sliding distance of the push rod. This prevents the push button from sliding back and forth with the push rod, thereby ensuring the stability of the push button's cooperation with the housing.

[0015] Preferably, the slideway 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 to axial sliding of the push button. Using the aforementioned technical solution, the cooperation between the positioning protrusion and the positioning groove further improves the positioning stability of the push button, preventing the adjusting member from causing the push button to slide axially via the push rod.

[0016] Preferably, a reset member is provided in the housing, the reset member acts on the intermediate shaft so that the intermediate shaft drives the upper impact member to approach the lower impact member, and the positioning groove has an opening in the direction in which the intermediate shaft moves away from the lower impact member.

[0017] Preferably, the motor assembly includes a drive motor and a reducer, the reducer includes a planetary carrier, the ratchet assembly includes a transmission shaft, the two ends of the intermediate shaft are respectively engaged with the planetary carrier and the transmission shaft to prevent rotation, and a reset member is provided in the casing, the reset member acts on the intermediate shaft so that the intermediate shaft has a tendency to slide toward the planetary carrier, and the upper impact member is close to the transmission shaft relative to the lower impact member; or, the reset member acts on the intermediate shaft so that the intermediate shaft has a tendency to slide toward the transmission shaft, and the upper impact member is close to the planetary carrier relative to the lower impact member.

[0018] Other features and advantages of the present invention will be disclosed in detail in the following specific embodiments and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below with reference to the accompanying drawings: Figure 1 An exploded view of the ratchet wrench of the present invention; Figure 2 A front view of the ratchet wrench of the present invention in a non-impact mode; Figure 3 The ratchet wrench of the present invention is in a cross-sectional view in a non-impact mode. Figure 1 ; Figure 4 The ratchet wrench of the present invention is in a cross-sectional view in a non-impact mode. Figure 2 ; Figure 5 Schematic diagram of the partial structure of the ratchet wrench of the present invention in the non-impact mode; Figure 6 A front view of the ratchet wrench of the present invention in impact mode; Figure 7 A cross-sectional view of the ratchet wrench of the present invention in impact mode Figure 1 ; Figure 8 for Figure 7 A partial enlarged view of part A; Figure 9 A cross-sectional view of the ratchet wrench of the present invention in impact mode Figure 2 ; Figure 10 Schematic diagram of the partial structure of the ratchet wrench of the present invention in the impact mode; Figure 11 An exploded view of the transmission assembly in the ratchet wrench of the present invention; Figure 12 A schematic structural diagram of the push button in the ratchet wrench of the present invention.

[0020] 1. Casing; 11. Slide; 111. First limiting groove; 112. Second limiting groove; 113. Limit baffle; 114. Positioning groove; 12. Fixed seat; 121. Fixed plate; 122. Fastener; 2. Driving motor; 21. Output shaft; 22. Reducer; 221. Planetary carrier; 3. Ratchet assembly; 31. Transmission shaft; 4. Intermediate shaft; 41. Step portion; 42. Reset member; 51. Adjusting member; 511. Push rod; 512. First boss; 52. Upper impact member; 521. First tooth portion; 53. Lower impact member; 531. Second boss; 532. Second tooth portion; 54. Bushing; 541. Ball; 55. Push button; 551. Positioning protrusion; 552. Positioning groove; 56. Elastic member. DETAILED DESCRIPTION

[0021] The following is an explanation and description of the technical solutions of the embodiments of the present invention in conjunction with the drawings of the embodiments of the present invention. However, the following embodiments are only preferred embodiments of the present invention and are not exhaustive. Based on the embodiments in the implementation manner, other embodiments obtained by those skilled in the art without creative work are all within the scope of protection of the present invention.

[0022] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0023] In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connect," "fixed," etc. should be understood broadly. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0024] like Figures 1 to 12 As shown, this embodiment shows a ratchet wrench, including a housing 1, which 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 in the housing 1. The upper impact member 52 and the lower impact member 53 are provided with mutually meshing teeth on opposite sides. The intermediate shaft 4 is elastically loaded so that the intermediate shaft 4 drives the upper impact member 52 to approach 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 limits the axial sliding distance of the intermediate shaft 4 to limit the upper impact member 52 and the lower impact member 53 from approaching 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 approach each other.

[0025] In this embodiment, the upper impact member 52 is fixed to the intermediate shaft 4, and the lower impact member 53 is fixed in the housing 1. The upper impact member 52 and the lower impact member 53 both have teeth. The intermediate shaft 4 is elastically loaded so that the intermediate shaft 4 has an axial movement tendency. The adjustment member 51 is connected to the intermediate shaft 4 and can move axially with the intermediate shaft 4. The adjustment member 51 has a first position and a second position. When the adjustment member 51 is in the first position, the adjustment member 51 forms an axial limit on the intermediate shaft 4, thereby limiting the intermediate shaft 4 from driving the upper impact member 52 close to the lower impact member 53. The intermediate shaft 4 drives the upper impact member 52 to rotate during the rotation process. The upper impact piece 52 does not come into contact with the lower impact piece 53 during the rotation process. In this state, the intermediate shaft 4 does not generate axial displacement during the rotation process, that is, when the adjusting piece 51 is in the first position, the ratchet wrench is in the non-impact mode; and when the adjusting piece 51 is in the second position, the adjusting piece 51 releases the restriction on the intermediate shaft 4, and the intermediate shaft 4 moves axially due to the elastic loading, and the intermediate shaft 4 drives the upper impact piece 52 to approach the lower impact piece 53, and makes the teeth of the upper impact piece 52 mesh with the teeth of the lower impact piece 53. The intermediate shaft 4 drives the upper impact piece 52 to rotate during the rotation process, and the upper impact piece 52 is engaged with the teeth of the lower impact piece 53. When the lower impact piece 53 is rotated, the interaction between the two teeth will push the upper impact piece 52 away from the lower impact piece 53. After the two teeth are rotated to the point where the tips are staggered, the intermediate shaft 4 will drive the upper impact piece 52 to continue to approach the lower impact piece 53 due to elastic loading. In this state, during the rotation of the intermediate shaft 4, the upper impact piece 52 and the lower impact piece 53 will repeatedly engage and disengage. During the process of the upper impact piece 52 rotating from disengagement to engagement, the torque of the intermediate shaft 4 will be increased, thereby being able to more effectively and quickly tighten or loosen the fastener 122. At this time, the ratchet wrench is in impact mode. In this embodiment, by adjusting Switching between the first position and the second position of part 51 can realize the switching of the ratchet wrench between the impact mode and the non-impact mode. During normal use, the ratchet wrench is switched to the non-impact mode, which can reduce vibration during use, reduce the noise of the ratchet wrench, and help improve the user's usage experience; and when it is necessary to improve the locking or loosening efficiency of the fastener 122, the ratchet wrench can be switched to the impact mode, thereby improving the user's assembly and disassembly efficiency; the switching between the two modes can meet the different usage needs of the user, thereby effectively improving the applicability of the ratchet wrench and giving the user a better usage experience.

[0026] like Figure 1As shown, in this embodiment, the casing 1 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, and a sun gear is provided at the end of the output shaft 21 of the drive motor 2. The planetary gear is fitted with the sun gear and the ring gear at the same time, and the planetary gear is installed 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, and the ratchet assembly 3 includes a transmission shaft 31, and the two ends of the intermediate shaft 4 are respectively fixed with the planet carrier 221 and the transmission shaft 31, and the intermediate shaft 4 can slide along the axial direction. 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, and the planetary gear will drive the planet carrier 221 to rotate during the rotation. The planet carrier 221 drives the transmission shaft 31 to rotate through the intermediate shaft 4, and the transmission shaft 31 drives the working head of the ratchet assembly 3 to run to tighten or loosen the bolts.

[0027] like Figure 11 As shown, in this embodiment, a fixing seat 12 is fixed in the housing 1, a lower impact member 53 is fixed to the fixing seat 12, the intermediate shaft 4 passes through the lower impact member 53, and the intermediate shaft 4 does not come into contact with 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, and the upper impact member 52 and the lower impact member 53 are provided with mutually meshing teeth on the opposite sides. A reset member 42 is provided in the housing 1, and 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 to make the intermediate shaft 4 slide toward the planetary carrier 221 The upper impact piece 52 is closer to the transmission shaft 31 relative to the lower impact piece 53, so the intermediate shaft 4 will drive the upper impact piece 52 to approach the lower impact piece 53 under the action of the reset piece 42; of course, it can be understood that in other embodiments, the reset piece 42 can also be located between the intermediate shaft 4 and the planetary carrier 221, and the reset piece 42 acts on the intermediate shaft 4 to make the intermediate shaft 4 have a tendency to slide toward the transmission shaft 31. The upper impact piece 52 is closer to the planetary carrier 221 relative to the lower impact piece 53, so the intermediate shaft 4 will drive the upper impact piece 52 to approach the lower impact piece 53 under the action of the reset piece 42.

[0028] like Figure 11As shown, in this embodiment, the intermediate shaft 4 is provided with a lower impact member 53, an upper impact member 52 and an adjusting member 51 in sequence from the planetary carrier 221 to the transmission shaft 31, that is, the upper impact member 52 is located between the adjusting member 51 and the lower impact member 53, and a plurality of bosses are provided on the opposite side of the adjusting member 51 and the lower impact member 53, and the bosses are spaced apart along the circumferential direction, and a gap is formed between two adjacent bosses, and the width of the gap is greater than the width of the boss, thereby ensuring that the boss can extend into the gap, wherein the boss of the adjusting member 51 is the first boss 512, and the boss of the lower impact member 53 is the second boss 531. When in the first position, the adjusting member 51 is The first boss 512 abuts against the second boss 531 of the lower impact member 53. Since the adjusting member 51 moves axially with the intermediate shaft 4, the intermediate shaft 4 cannot continue to move toward the planetary carrier 221 under the restriction of the adjusting member 51 and the lower impact member 53. This can restrict the intermediate shaft 4 from driving the upper impact member 52 close to the lower impact member 53, so as to separate the upper impact member 52 from 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. 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 staggered with each other, that is, the first boss 512 is aligned with the gap between the two second bosses 531, and the intermediate shaft 4 slides toward the planetary carrier 221 under the action of the reset member 42, 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. In the process of the adjusting member 51 sliding toward the lower impact member 53, the intermediate shaft 4 will also drive the upper impact member 52 to approach the lower impact member 53, so that the first tooth portion 521 of the upper impact member 52 is engaged with the second tooth portion 532 of the lower impact member 53. At this time, the ratchet wrench is in the impact mode. In the process of the rotation of the intermediate shaft 4, the upper impact member 52 moves along with the intermediate shaft 4. Rotation, when the upper impact piece 52 rotates, the interaction between the first tooth portion 521 and the second tooth portion 532 will push the upper impact piece 52 away from the lower impact piece 53. When the upper impact piece 52 rotates until the tips of the first tooth portion 521 and the second tooth portion 532 are against each other, the sliding distance of the upper impact piece 52 relative to the lower impact piece 53 is the largest. Thereafter, after the tips of the first tooth portion 521 and the second tooth portion 532 are staggered from each other, the intermediate shaft 4 will drive the upper impact piece 52 to continue to approach the lower impact piece 53 due to elastic loading. In this state, during the rotation of the intermediate shaft 4, the upper impact piece 52 and the lower impact piece 53 will repeatedly engage and disengage, so as to produce an impact effect during the rotation of the intermediate shaft 4. In the process of the upper impact piece 52 rotating from disengagement to engagement, the torque of the intermediate shaft 4 will be increased, thereby being able to more effectively and quickly lock or loosen the fastener 122.

[0029] In order to make the assembly of the transmission component tighter, the boss of the lower impact member 53 described in this embodiment is surrounded to form an avoidance groove for the upper impact member 52 to extend into, and the second tooth portion 532 of the lower impact member 53 is arranged on the groove wall opposite to the avoidance groove and the upper impact member 52. When the teeth of the upper impact member 52 and the lower impact member 53 are engaged, the upper impact member 52 will move into the avoidance groove of the lower impact member 53, so that the upper impact member 52 and the lower impact member 53 are matched more tightly, reducing the space occupied by the upper impact member 52 and the lower impact member 53.

[0030] like Figure 8 As shown, the intermediate shaft 4 in this embodiment is provided with a positioning step, and a shaft sleeve 54 is mounted on the intermediate shaft 4. The shaft sleeve 54 and the adjusting member 51 are restricted between the positioning step and the upper impact member 52 to realize axial positioning of the adjusting member 51 and the intermediate shaft 4. A plurality of balls 541 are movably provided on the shaft sleeve 54 facing the side of the adjusting member 51. The balls 541 are 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 shaft sleeve 54 can be reduced, and the wear of the adjusting member 51 and the shaft sleeve 54 can be reduced, which helps to extend the service life of the adjusting member 51 and the shaft sleeve 54; in addition, the positioning step and the upper impact member 52 are used to position the adjusting member 51, ensuring that the adjusting member 51 can slide axially with the intermediate shaft 4, so as to increase the assembly stability of the adjusting member 51 and the intermediate shaft 4.

[0031] like Figure 4 and Figure 9 As shown, the adjusting member in this embodiment is connected with a push button 55, wherein the adjusting member 51 is annular as a whole, the adjusting member 51 is sleeved on the intermediate shaft 4, and the adjusting member 51 can rotate around the intermediate shaft 4, and the outer peripheral side of the adjusting member 51 is provided with a push rod 511 protruding outward, and 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, and the push button 55 is provided with a positioning groove 552 for the push rod 511 to extend into the side facing the adjusting member 51, and the push button 55 cooperates with the push rod 511 of the adjusting member 51 through the positioning groove 552 to drive the adjusting member 51 to rotate, and the push button 55 slides along the slide groove 11 to drive the adjusting member 51 to switch between the first position and the second position. By controlling the rotation of the adjusting member 51 by the push button 55, the position switching of the adjusting member 51 can be made more convenient and quick, which helps to reduce the difficulty of operating the adjusting member 51.

[0032] like Figure 12As shown, in this embodiment, the push button 55 is provided with three limit plates on the side facing the adjusting member 51, and the positioning groove 552 is formed between the three limit plates. When the push rod 511 extends into the positioning groove 552, two of the limit plates are located on both sides of the push rod 511. When the push button 55 slides along the slide groove 11, the limit plates will resist the push rod 511 and thus drive the push rod 511 to rotate circumferentially; the other limit plate is located on the side of the push rod 511 facing the planetary carrier 221. The intermediate shaft 4 will move toward the planetary carrier 221 under the action of the reset member 42. At this time, the push rod 511 will resist the limit plate, thereby preventing the push rod 511 from disengaging. The positioning groove 552, when the adjusting member 51 is in the second position, the adjusting member 51 will move axially with the intermediate shaft 4, and the positioning groove 552 has an opening in the direction of the intermediate shaft 4 away from the lower impact member 53, which can prevent the push button 55 from sliding back and forth with the push rod 511, thereby ensuring the stability of the cooperation between the push button 55 and the housing 1; of course, it is understandable that in other embodiments, the positioning groove 552 can also be closed in the axial direction of the intermediate shaft 4, and 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.

[0033] like Figure 5 and Figure 10 As shown, the slide groove 11 in this embodiment is provided with a limit baffle 113, and a first limit groove 111 and a second limit groove 112 are formed on both sides of the limit baffle 113 respectively. When the push rod 511 of the adjusting member 51 is in the first limit 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 limit groove 112, the adjusting member 51 rotates to the second position, and the push rod 511 passes over the limit baffle 113 and enters the first limit groove 111 or the second limit groove 112 to realize the switching of the adjusting member 51 between the first position and the second position. The limit baffle 113 can separate the first position and the second position of the adjusting member 51, preventing the adjusting member 51 from arbitrarily departing from the first position or the second position, ensuring that the impact mode or the no-impact mode can be stably maintained, preventing damage to the internal structure due to arbitrary switching of modes, and making the cooperation of the internal structure of the ratchet wrench more stable and reliable.

[0034] It should be noted that there is a gap between the limit baffle 113 and the slide 11 for the push rod 511 to pass over the limit baffle 113. The gap is on the side of the slide 11 close 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 limit baffle 113, thereby preventing the adjusting member 51 from arbitrarily leaving the first position or the second position. In the manual mode, the user first needs to push the push button 55 in the direction of the ratchet assembly 3 to release the push rod 511 from the gap. The gap is aligned, and then the push button 55 is pushed to rotate axially along the slide groove 11, thereby passing the limit baffle 113, and finally the push button 55 is released. The intermediate shaft 4 automatically moves away from the ratchet assembly 3 under the action of the reset member 42, so that the adjusting member 51 moves 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 an elastic member 56, which is distributed in a ring shape on the outer peripheral side of the sleeve 54, and a fixing plate 121 is fixed to the fixing seat 12 by a fastener 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.

[0035] like Figure 6 As shown, the slide groove 11 in this embodiment is provided with a positioning groove 114, and the push button 55 is provided with a positioning protrusion 551 matching 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 to axial sliding. 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.

[0036] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Those skilled in the art will understand that the present invention includes, but is not limited to, the contents described in the drawings and the above specific embodiments. Any modifications that do not deviate from the functional and structural principles of the present invention are intended to be included within the scope of the claims.

Claims

1. A ratchet wrench, comprising a housing (1), wherein the housing (1) is provided with a motor assembly, a transmission assembly and a ratchet assembly (3), characterized in that: The transmission assembly comprises 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), wherein the upper impact member (52) is fixed to the intermediate shaft (4), and the lower impact member (53) is fixed in the housing (1). The upper impact member (52) and the lower impact member (53) are provided with mutually meshing teeth on opposite sides. The intermediate shaft (4) is elastically loaded so that the intermediate shaft (4) drives the upper impact member (52) to approach 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. When in the first position, the adjusting member (51) limits the axial sliding distance of the intermediate shaft (4) to limit the upper impact member (52) and the lower impact member (53) from approaching each other. When in the second position, the adjusting member (51) releases the restriction on the intermediate shaft (4) to allow the upper impact member (52) and the lower impact member (53) to approach each other.

2. A ratchet wrench according to claim 1, characterized in that: A plurality of bosses are provided on opposite sides of the lower impact member (53) and the adjusting member (51), and the bosses are spaced apart along the circumferential direction. In the first position, the bosses of the adjusting member (51) abut against the bosses of the lower impact member (53), thereby limiting the intermediate shaft (4) from driving the upper impact member (52) close to the lower impact member (53); in the second position, the bosses of the adjusting member (51) and the bosses of the lower impact member (53) are staggered with each other, thereby releasing 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) is arranged to form an avoidance groove for the upper impact member (52) to extend into, and the teeth of the lower impact member (53) are arranged on the groove wall opposite to the avoidance groove and 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 achieve axial positioning of the adjusting member (51) and the intermediate shaft (4).

5. A ratchet wrench according to claim 4, characterized in that: The intermediate shaft (4) is provided with a shaft sleeve (54), which is limited between the positioning step and the adjusting member (51). The shaft sleeve (54) is provided with a plurality of balls (541) on one side of the shaft sleeve (54) that are movable toward the adjusting member (51), and the balls (541) are against the adjusting member (51).

6. The ratchet wrench according to claim 1, characterized in that: The adjusting member (51) is connected to a push button (55), and a push rod (511) protruding outward is provided on the outer peripheral side of the adjusting member (51). A slide groove (11) is provided on the housing (1). The push button (55) is connected to the push rod (511) and is slidably mounted on the slide groove (11). The push button (55) slides along the slide groove (11) to drive the adjusting member (51) to switch between the first position and the second position.

7. A ratchet wrench according to claim 6, characterized in that: The slide groove (11) is provided with a limiting baffle (113), and a first limiting groove (111) and a second limiting groove (112) are respectively 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), so as to realize the switching of the adjusting member (51) between the first position and the second position.

8. The ratchet wrench according to claim 6, characterized in that: The adjusting member (51) is further connected to an elastic member (56), which is distributed in a ring shape. One end of the elastic member (56) is positioned in the housing (1), and the other end is positioned in the adjusting member (51).

9. The ratchet wrench according to claim 6, characterized in that: The push button (55) is provided with a positioning groove (552) for the push rod (511) to extend into. The push button (55) pushes the adjusting member (51) to rotate through the cooperation between 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. 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 groove (11) is provided with a positioning groove (114), and the push button (55) is provided with a positioning protrusion (551) matching 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) to sliding along the axial direction.

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

12. The ratchet wrench according to claim 1, characterized in that: The motor assembly comprises a driving motor (2) and a reducer (22), the reducer (22) comprises a planetary carrier (221), the ratchet assembly (3) comprises a transmission shaft (31), the two ends of the intermediate shaft (4) are respectively engaged with the planetary carrier (221) and the transmission shaft (31) for rotation prevention, a reset member (42) is provided in the housing (1), the reset member (42) acts on the intermediate shaft (4) so ​​that the intermediate shaft (4) has a tendency to slide toward the planetary carrier (221), and the upper impact member (52) is close to the transmission shaft (31) relative to the lower impact member (53); or the reset member (42) acts on the intermediate shaft (4) so ​​that the intermediate shaft (4) has a tendency to slide toward the transmission shaft (31), and the upper impact member (52) is close to the planetary carrier (221) relative to the lower impact member (53).

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