Power tool

Abstract

The application discloses an electric tool, which comprises a housing, an output shaft arranged in the housing, a first gear, a clutch sleeve and a second gear which are sequentially sleeved on the output shaft; the first gear and the second gear are movably connected with the output shaft, the clutch sleeve is circumferentially locked and axially slidably connected with the output shaft, the clutch sleeve has a first position for engaging with the first gear and a second position for engaging with the second gear; the electric tool further comprises a retaining mechanism connected with the clutch sleeve; the retaining mechanism has a first state for retaining the clutch sleeve at the first position and a second state for retaining the clutch sleeve at the second position. The electric tool can retain the clutch sleeve at the first position or the second position through the retaining mechanism, so as to adjust the rotating speed of the output shaft. The electric tool simplifies the speed adjusting structure and improves the assembly convenience.

Description

Technical Field

[0001] This application belongs to the field of tool technology, specifically relating to an electric tool. Background Technology

[0002] Power tools are electrically powered tools used for a variety of tasks, such as drilling, grinding, cutting, and polishing. There are many types of power tools, including water drills, hammer drills, electric picks, electric drills, electric saws, and electric grinders. Some power tools require speed adjustment based on usage needs. Directly controlling the motor speed is one option, but torque cannot be adjusted via the transmission ratio. Existing speed adjustment mechanisms involve many components, are complex in structure, and are difficult to assemble.

[0003] Therefore, it is necessary to provide an electric tool to address the aforementioned technical problems. Utility Model Content

[0004] The purpose of this application is to provide a power tool that can solve the problems of complex structure and difficult assembly of existing gear shifting mechanisms.

[0005] To achieve the above objectives, a specific embodiment of this application provides the following technical solution:

[0006] An electric tool includes a housing, an output shaft disposed within the housing, and a first gear, a clutch sleeve, and a second gear sequentially sleeved on the output shaft; the first gear and the second gear are movably connected to the output shaft, the clutch sleeve is circumferentially locked and axially slidingly engaged with the output shaft, and the clutch sleeve has a first position engaging with the first gear and a second position engaging with the second gear;

[0007] The power tool further includes a retaining mechanism connected to the clutch sleeve; the retaining mechanism has a first state of retaining the clutch sleeve in the first position and a second state of retaining the clutch sleeve in the second position.

[0008] In one or more embodiments of this application, the retaining mechanism includes a drive component that drives the clutch sleeve to move toward the first position or the second position, and / or a locking component that locks the clutch sleeve in the first position or the second position.

[0009] In one or more embodiments of this application, the drive assembly includes a first drive member and a second drive member, the first drive member applying a driving force toward the second gear to the clutch sleeve, and the second drive member applying a driving force toward the first gear to the clutch sleeve.

[0010] In one or more embodiments of this application, when the clutch sleeve is in the first position, the second driving member applies a driving force to the clutch sleeve, the first driving member separates from the clutch sleeve, and the clutch sleeve engages with the first gear.

[0011] In one or more embodiments of this application, when the clutch sleeve is in the second position, the first driving member applies a driving force to the clutch sleeve, the first driving member and the second driving member apply a driving force to the clutch sleeve simultaneously, and the force applied by the first driving member to the clutch sleeve is greater than the force applied by the second driving member to the clutch sleeve, and the clutch sleeve is engaged with the second gear.

[0012] In one or more embodiments of this application, a paddle is further included, which is driven by the driving force of the driving assembly to drive the clutch sleeve to move toward the direction of engagement of the second gear or the first gear; wherein the paddle can be limited to a preset position to restrict the first driving member from applying a driving force to the clutch sleeve.

[0013] In one or more embodiments of this application, an eccentric knob is further included, wherein the paddle has a mating groove, the eccentric knob includes an eccentric pin inserted into the mating groove, the eccentric pin slidingly engaging with the groove wall of the mating groove; and / or, a positioning pin is further included fixed to the housing, the paddle slidingly engaging with the positioning pin.

[0014] In one or more embodiments of this application, the first driving member is configured as a first spring sleeved outside the positioning pin, and the two ends of the first spring abut against the housing and the lever, respectively.

[0015] In one or more embodiments of this application, the second driving member is configured as a second spring sleeved on the output shaft, the second spring being located between the clutch sleeve and the second gear; the clutch sleeve has an assembly groove at one end facing the second gear, and the two ends of the second spring respectively abut against the bottom of the assembly groove and the second gear.

[0016] In one or more embodiments of this application, a distance ring is further included on the clutch sleeve. The peripheral wall of the clutch sleeve is provided with a first abutment portion, the paddle is provided with a second abutment portion, and the distance ring is located between the first abutment portion and the second abutment portion. When the clutch sleeve is driven to mesh with the first gear, the paddle is limited to the preset position, and the second abutment portion and the distance ring are in clearance fit.

[0017] Compared with the prior art, the power tool of this application can keep the clutch sleeve in a first position engaged with the first gear or in a second position engaged with the second gear through a holding mechanism. When the clutch sleeve is in different positions, the speed of the power tool's output shaft can be adjusted accordingly. In particular, this application simplifies the speed adjustment structure and improves the ease of assembly. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of a power tool according to one embodiment of this application;

[0020] Figure 2 This is a schematic diagram of the internal structure of a power tool according to an embodiment of this application;

[0021] Figure 3 This is a schematic diagram of the structure corresponding to the output shaft of a power tool in one embodiment of this application;

[0022] Figure 4 This is a cross-sectional schematic diagram of a power tool according to an embodiment of this application;

[0023] Figure 5 This is a cross-sectional view of the output shaft of a power tool in one embodiment of this application.

[0024] Explanation of key figure labels:

[0025] 1. Housing; 2. Output shaft; 3. First gear; 4. Clutch sleeve; 41. First abutment part; 5. Second gear; 6. Motor; 7. Transmission assembly; 8. First drive component; 9. Second drive component; 10. Paddle; 101. Mating groove; 102. Second abutment part; 11. Eccentric knob; 111. Eccentric pin; 12. Distance ring; 13. Positioning pin. Detailed Implementation

[0026] To enable those skilled in the art to better understand the technical solutions in this disclosure, the technical solutions in the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. Based on the embodiments in this disclosure, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this disclosure.

[0027] Reference Figure 1 The power tools in this application include, but are not limited to, water drills, electric hammers, electric picks, electric drills, electric saws, electric grinders, and other power tools. The water drill is used as an example in this embodiment and the accompanying drawings to illustrate the power tools of this application; this is not intended to limit their types.

[0028] Reference Figure 1 and Figure 2 In one embodiment of this application, the power tool includes a housing 1, an output shaft 2 disposed within the housing 1, and a first gear 3, a clutch sleeve 4, and a second gear 5 sequentially sleeved on the output shaft 2. The first gear 3 and the second gear 5 are movably connected to the output shaft 2. The clutch sleeve 4 is circumferentially locked and axially slidingly engaged with the output shaft 2. The clutch sleeve 4 has a first position engaging with the first gear 3 and a second position engaging with the second gear 5. The power tool also includes a retaining mechanism connected to the clutch sleeve 4. The retaining mechanism has a first state of holding the clutch sleeve 4 in the first position and a second state of holding the clutch sleeve 4 in the second position. The circumferential locking and axial sliding engagement between the clutch sleeve 4 and the output shaft 2 can be achieved using a flat key.

[0029] Reference Figure 2 In this embodiment, the power tool may further include a motor 6 and a transmission assembly 7 that is driveably connected to the rotating shaft of the motor 6. The transmission assembly 7 is driveably connected to the first gear 3 and the second gear 5. In this embodiment, the transmission assembly 7 specifically includes a transmission shaft and a gear disposed on the transmission shaft, and the gear can mesh with the first gear 3 and the second gear 5.

[0030] When the holding mechanism holds the clutch sleeve 4 in the first position or in the second position, the clutch sleeve 4 can engage with the first gear 3 or the second gear 5 to adjust the speed of the output shaft 2 of the power tool and meet the speed regulation requirements.

[0031] Reference Figure 3 The retaining mechanism includes a drive assembly that drives the clutch sleeve 4 toward a first position or a second position, and / or a locking assembly that locks the clutch sleeve 4 in the first position or the second position.

[0032] Reference Figures 3 to 5Specifically, the drive assembly includes a first drive member 8 and a second drive member 9. The first drive member 8 applies a driving force toward the second gear 5 to the clutch sleeve 4, and the second drive member 9 applies a driving force toward the first gear 3 to the clutch sleeve 4. When the clutch sleeve 4 is in the first position, the second drive member 9 applies a driving force to the clutch sleeve 4, the first drive member 8 separates from the clutch sleeve 4, and the clutch sleeve 4 engages with the first gear 3. At this time, only the second drive member 9 applies a driving force to the clutch sleeve 4. When the clutch sleeve 4 is in the second position, the first drive member 8 applies a driving force to the clutch sleeve 4. Both the first drive member 8 and the second drive member 9 apply driving forces to the clutch sleeve 4 simultaneously, and the force applied by the first drive member 8 to the clutch sleeve 4 is greater than the force applied by the second drive member 9 to the clutch sleeve 4, so that the clutch sleeve 4 engages with the second gear 5.

[0033] Reference Figure 3 and Figure 5 The power tool in this application also includes a paddle 10 and an eccentric knob 11. The paddle 10, driven by the driving force of the drive assembly, drives the clutch sleeve 4 to move in the direction of engagement with the second gear 5 or the first gear 3. The paddle 10 can be confined to a preset position, limiting the driving force applied to the clutch sleeve 4 by the first drive member 8, so that the clutch sleeve 4 can engage with the first gear 3 under the action of the second drive member 9. The paddle 10 has a mating groove 101, and the eccentric knob 11 includes an eccentric pin 111 inserted into the mating groove 101. The eccentric pin 111 slides against the groove wall of the mating groove 101 to push the paddle 10 to move, further driving the clutch sleeve 4 to move via the paddle 10. In this embodiment, the paddle 10 is axially confined to the clutch sleeve 4.

[0034] Reference Figure 1 and Figure 3 In this embodiment, a mounting base for mounting an eccentric knob 11 is provided on the outer periphery of the housing 1. The aforementioned locking component is installed on one side of the eccentric knob 11 to lock the eccentric knob 11 in different positions, thereby locking the position of the paddle 10 and, consequently, the position of the clutch sleeve 4. A mounting groove may be provided on one side of the eccentric knob 11. The locking component may be configured as a limiting protrusion movably mounted within the mounting groove. A corresponding limiting groove is provided within the mounting base. When the limiting protrusion engages with the limiting groove, it can circumferentially limit the eccentric knob 11, further limiting the paddle 10 to maintain the position of the clutch sleeve 4.

[0035] Reference Figure 3In this embodiment, the power tool also includes a positioning pin 13 fixed to the housing 1. The lever 10 slides with the positioning pin 13 to allow the lever 10 to move along the axial direction of the positioning pin 13. The first driving member 8 can be configured as a first spring sleeved on the positioning pin 13, with both ends of the first spring abutting against the housing 1 and the lever 10, respectively. The second driving member 9 can be configured as a second spring sleeved on the output shaft 2, located between the clutch sleeve 4 and the second gear 5. The clutch sleeve 4 has an assembly groove at one end facing the second gear 5, and both ends of the second spring abut against the bottom of the assembly groove and the second gear 5, respectively. In this embodiment, the elastic force of the first spring on the lever 10 is greater than the elastic force of the second spring on the clutch sleeve 4, thereby allowing the clutch sleeve 4 to be in the second position. When the eccentric knob 11 is rotated to resist the elastic force of the first spring, the clutch sleeve 4 can be moved to the first position under the action of the second spring, thereby completing the speed switching of the power tool output shaft 2.

[0036] Reference Figure 3 and Figure 5 In one optional embodiment, the power tool further includes a spacer ring 12 fitted onto the clutch sleeve 4. The clutch sleeve 4 has a first abutment portion 41 protruding from its peripheral wall, and a second abutment portion 102 is provided on the paddle 10. The spacer ring 12 is located between the first abutment portion 41 and the second abutment portion 102. When the clutch sleeve 4 is driven to engage with the first gear 3, the paddle 10 is limited to a preset position, and the second abutment portion 102 and the spacer ring 12 are in clearance fit. By making the paddle 10 and the clutch sleeve 4 in clearance fit, friction between them can be reduced, thereby reducing heat generation and ensuring the service life of the power tool. Simultaneously, the friction between the clutch sleeve 4, the spacer ring 12, and the paddle 10 can also be reduced by setting the surface friction coefficient of the materials.

[0037] Reference Figure 5 In one optional embodiment, the power tool further includes a retaining ring and a washer disposed on the outer periphery of the output shaft 2 to limit the first gear 3 and the second gear 5.

[0038] Therefore, this application simplifies the speed control structure of the power tool and improves assembly convenience by maintaining the aforementioned structure of the mechanism through reasonable design. The power tool of this application can quickly adjust the speed of the output shaft 2 of the power tool through the cooperation of the first drive component 8, the second drive component 9, the clutch sleeve 4, the paddle 10, and the eccentric knob 11, and has good stability.

[0039] It will be apparent to those skilled in the art that this disclosure is not limited to the details of the exemplary embodiments described above, and that this disclosure can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of this disclosure is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this disclosure. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0040] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A power tool, characterized in that, The device includes a housing (1), an output shaft (2) disposed within the housing (1), and a first gear (3), a clutch sleeve (4), and a second gear (5) sequentially sleeved on the output shaft (2); the first gear (3) and the second gear (5) are movably connected to the output shaft (2), the clutch sleeve (4) is circumferentially locked and axially slidingly engaged with the output shaft (2), and the clutch sleeve (4) has a first position engaging with the first gear (3) and a second position engaging with the second gear (5); The power tool further includes a retaining mechanism connected to the clutch sleeve (4); the retaining mechanism has a first state of retaining the clutch sleeve (4) in the first position and a second state of retaining the clutch sleeve (4) in the second position.

2. The power tool according to claim 1, characterized in that, The retaining mechanism includes a drive component that drives the clutch sleeve (4) toward the first position or the second position, and / or a locking component that locks the clutch sleeve (4) in the first position or the second position.

3. The power tool according to claim 2, characterized in that, The drive assembly includes a first drive member (8) and a second drive member (9), wherein the first drive member (8) applies a driving force toward the second gear (5) to the clutch sleeve (4), and the second drive member (9) applies a driving force toward the first gear (3) to the clutch sleeve (4).

4. The power tool according to claim 3, characterized in that, When the clutch sleeve (4) is in the first position, the second driving member (9) applies a driving force to the clutch sleeve (4), the first driving member (8) separates from the clutch sleeve (4), and the clutch sleeve (4) engages with the first gear (3).

5. The power tool according to claim 3, characterized in that, When the clutch sleeve (4) is in the second position, the first driving member (8) applies a driving force to the clutch sleeve (4), the first driving member (8) and the second driving member (9) apply a driving force to the clutch sleeve (4) at the same time, and the force applied by the first driving member (8) to the clutch sleeve (4) is greater than the force applied by the second driving member (9) to the clutch sleeve (4), and the clutch sleeve (4) is engaged with the second gear (5).

6. The power tool according to claim 3, characterized in that, It also includes a paddle (10), which is driven by the driving force of the driving assembly to drive the clutch sleeve (4) to move in the direction of engagement with the second gear (5) or the first gear (3); wherein the paddle (10) can be limited to a preset position to restrict the first driving member (8) from applying a driving force to the clutch sleeve (4).

7. The power tool according to claim 6, characterized in that, It also includes an eccentric knob (11), the paddle (10) having a mating groove (101), the eccentric knob (11) including an eccentric pin (111) inserted into the mating groove (101), the eccentric pin (111) slidingly engaging with the groove wall of the mating groove (101); and / or, it also includes a positioning pin (13) fixed to the housing (1), the paddle (10) slidingly engaging with the positioning pin (13).

8. The power tool according to claim 7, characterized in that, The first driving member (8) is configured as a first spring sleeved outside the positioning pin (13), and the two ends of the first spring abut against the housing (1) and the paddle (10) respectively.

9. The power tool according to claim 3, characterized in that, The second driving component (9) is configured as a second spring sleeved on the output shaft (2), and the second spring is located between the clutch sleeve (4) and the second gear (5); the clutch sleeve (4) has an assembly groove at one end facing the second gear (5), and the two ends of the second spring abut against the bottom of the assembly groove and the second gear (5) respectively.

10. The power tool according to claim 6, characterized in that, It also includes a distance ring (12) fitted on the clutch sleeve (4), the peripheral wall of the clutch sleeve (4) is provided with a first abutment part (41), the paddle (10) is provided with a second abutment part (102), and the distance ring (12) is located between the first abutment part (41) and the second abutment part (102); when the clutch sleeve (4) is driven to mesh with the first gear (3), the paddle (10) is limited to the preset position, and the second abutment part (102) and the distance ring (12) are in clearance fit.

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