Impact tool

Abstract

The utility model discloses an impact tool which comprises a shell, an adjusting piece arranged outside the shell, a switching sleeve, a clutch sleeve, a striking block and a main shaft, wherein the switching sleeve, the clutch sleeve, the striking block and the main shaft are arranged in the shell. The switching sleeve slidably sleeves the clutch sleeve, the clutch sleeve slidably sleeves the striking block, the striking block is in transmission connection with the main shaft, and the main shaft is in transmission connection with the motor; the adjusting piece can be operated to slide, so that the switching sleeve drives the clutch sleeve to be clamped with or separated from the striking block; the impact tool further comprises an electronic element for receiving the combination state of the clutch sleeve and the striking block. When the combination state of the impact tool is clamping, the motor is controlled to maintain a first rotating speed; the impact tool controls the motor to maintain a second rotating speed when the combination state is disengaged; wherein the first rotating speed is smaller than the second rotating speed. According to different use modes, the impact tool can adapt to different modes through linkage control over the combination state of the clutch sleeve and the striking block and the rotating speed of the motor, abrasion of the striking block can be reduced, and the service life of the whole machine can be prolonged.

Description

Technical Field

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

[0002] Existing impact tools, designed to be compatible with both impact wrenches and screwdrivers, can have their original square output shaft modified into a composite structure with an external square and an internal hexagonal shaft. While this modification does not affect the original performance of the impact wrench, when used as a screwdriver, the significant differences in operating conditions between the wrench and the screwdriver (screwdrivers operate under light loads at high speeds, while impact wrenches operate under heavy loads at low speeds) cause the modified structure to subject the internal striking block to abnormal friction and impact loads, accelerating wear. This abnormal wear not only results in unstable torque output in screwdriver mode but also significantly reduces the lifespan of key transmission components, ultimately leading to a substantial decrease in the overall durability of the machine.

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

[0004] The purpose of this application is to provide an impact tool that can solve the problem of easy wear of the internal striking block of the impact tool that is compatible with both impact wrench and screwdriver functions, thus reducing the service life of the entire machine.

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

[0006] An impact tool includes a housing, an adjustment member disposed outside the housing, and a switching sleeve, a clutch sleeve, an impact block, and a spindle disposed inside the housing;

[0007] The switching sleeve is slidably sleeved outside the clutch sleeve, the clutch sleeve is slidably sleeved outside the striking block, the striking block is connected to the main shaft drive, and the main shaft drive is connected to the motor;

[0008] The adjusting member can be operably slidable to cause the switching sleeve to drive the clutch sleeve to engage or disengage from the striking block;

[0009] The impact tool further includes an electronic component that receives the engagement state of the clutch sleeve and the impact block; when the engagement state is engaged, the impact tool controls the motor to maintain a first speed; when the engagement state is disengaged, the impact tool controls the motor to maintain a second speed; wherein the first speed is less than the second speed.

[0010] In one or more embodiments of this application, the electronic component is configured to sense the engagement state through the sliding position of the adjustment member.

[0011] In one or more embodiments of this application, the electronic component includes a Hall sensor mounted on the housing, and the adjustment member is equipped with a first magnetic element that mates with the position of the Hall sensor.

[0012] In one or more embodiments of this application, the adjusting member is annular and slidably sleeved on the outer periphery of the housing.

[0013] In one or more embodiments of this application, the housing has a strip-shaped hole, and a connecting rod is connected between the adjusting member and the switching sleeve. The connecting rod passes through the strip-shaped hole, and the extending direction of the strip-shaped hole is consistent with the operably sliding direction of the adjusting member.

[0014] In one or more embodiments of this application, the impact tool further includes a snap-fit ​​component, the peripheral wall of the impact block is provided with a first snap-fit ​​groove, the peripheral wall of the clutch sleeve is provided with a second snap-fit ​​groove, and the impact block and the clutch sleeve can cooperate to move to communicate with the first snap-fit ​​groove and the second snap-fit ​​groove.

[0015] When the impact tool is in the disengaged state, the latching member is at least partially located in the second latching groove, and the latching member is disengaged from the first latching groove, and the clutch sleeve is disengaged from the movement of the impact block; when the impact tool is in the engaged state, the latching member is simultaneously located in both the first and second latching grooves, and the latching member connects the clutch sleeve and the impact block.

[0016] In one or more embodiments of this application, the switching sleeve is provided with a second magnetic element, which can attract the snap-fit ​​member to disengage from the first snap-fit ​​groove.

[0017] In one or more embodiments of this application, the side of the switching sleeve away from the motor is provided with an extension, and a receiving space for accommodating the snap-fit ​​member is formed between the extension and the second snap-fit ​​groove.

[0018] In one or more embodiments of this application, the striking block is provided with a positioning part, and when the switching sleeve is driven to abut against the positioning part, the first snap-fit ​​groove and the second snap-fit ​​groove are in communication.

[0019] In one or more embodiments of this application, the clutch sleeve is provided with an abutment portion at one end near the motor. When the switching sleeve moves to abut the abutment portion, the clutch sleeve can be pushed to disengage from the striking block.

[0020] Compared to existing technologies, the impact tool of this application dynamically adjusts the motor speed by controlling the engagement state of the clutch sleeve and the striking block to adapt to the needs of different operating modes. In wrench mode, the clutch sleeve and the striking block can be engaged as a single unit by sliding the adjusting mechanism. The impact tool can then control the motor to maintain a low initial speed based on the engagement state obtained by the electronic components, resulting in a reduced striking frequency, which is beneficial for heavy-load, low-speed wrench operations. In screwdriver mode, the clutch sleeve and the striking block can be disengaged by sliding the adjusting mechanism. The impact tool can then control the motor to maintain a high second speed based on the engagement state obtained by the electronic components, simultaneously increasing the striking frequency of the striking block, which is beneficial for light-load, high-speed screwdriver operations.

[0021] Therefore, the impact tool of this application can be controlled by the linkage between the engagement state of the clutch sleeve and the striking block and the motor speed, allowing the tool to operate at low speed under heavy load in wrench mode and at high speed under light load in screwdriver mode, depending on the different usage modes. Based on the speed matching of different modes, the working effect can be optimized, and the wear of the internal striking block of the impact tool can be significantly reduced, thereby extending the service life of the entire machine. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this application 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 application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a partial exploded structure diagram of an impact tool in one embodiment of this application;

[0024] Figure 2 This is a cross-sectional schematic diagram of the impact tool in the screwdriver mode according to one embodiment of this application;

[0025] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0026] Figure 4 This is a cross-sectional schematic diagram of the impact tool in wrench mode according to an embodiment of this application;

[0027] Figure 5 for Figure 4 Enlarged view of point B in the middle;

[0028] Figure 6 This is a schematic diagram of the housing and electronic components of an impact tool according to one embodiment of this application;

[0029] Figure 7This is a schematic diagram of the adjusting member and connecting rod of the impact tool in one embodiment of this application.

[0030] Explanation of key figure labels:

[0031] 1. Housing; 11. Mounting slot; 12. Strip hole; 2. Adjusting component; 3. Switching sleeve; 31. Extension; 4. Clutch sleeve; 41. Second snap-fit ​​slot; 42. Abutment part; 5. Strike block; 51. First snap-fit ​​slot; 52. Positioning part; 6. Main shaft; 7. Motor; 8. Output shaft; 9. Electronic components; 10. Snap-fit ​​component; 13. Connecting rod; 14. Second magnetic component; 15. Mounting shell; 16. Push button; 17. Limiting bracket. Detailed Implementation

[0032] To enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of this application.

[0033] The impact tool of this application can be applied to various working environments. This embodiment uses both wrench mode and screwdriver mode as examples for illustrative purposes. It should be noted that the wrench mode requires heavy-duty, low-speed operation, while the screwdriver mode requires light-duty, high-speed operation to meet the corresponding work requirements.

[0034] Reference Figure 1 and Figure 3 In one embodiment of this application, the impact tool includes a housing 1, an adjusting member 2 disposed outside the housing 1, and a switching sleeve 3, a clutch sleeve 4, an impact block 5, and a main shaft 6 disposed inside the housing 1. The switching sleeve 3 is slidably sleeved outside the clutch sleeve 4, and the clutch sleeve 4 is slidably sleeved outside the impact block 5. The impact block 5 is driveably connected to the main shaft 6, and the main shaft 6 is driveably connected to a motor 7. The end of the main shaft 6 away from the motor 7 is driveably connected to an output shaft 8. The motor 7 can drive the main shaft 6 to rotate, thereby driving the output shaft 8 to rotate. The adjusting member 2 can be operably slidable to allow the switching sleeve 3 to drive the clutch sleeve 4 to engage or disengage from the impact block 5.

[0035] Reference Figure 1 The impact tool also includes an electronic component 9 that receives the engagement state of the clutch sleeve 4 and the impact block 5; when the engagement state is in a snap-fit ​​state, the impact tool controls the motor 7 to maintain a first speed; when the engagement state is in a disengaged state, the impact tool controls the motor 7 to maintain a second speed; wherein, the first speed is less than the second speed.

[0036] Reference Figure 2 and Figure 3 In screwdriver mode, the clutch sleeve 4 can be disengaged from the striking block 5 by sliding the adjusting piece 2. The impact tool can control the motor 7 to maintain a high speed second rotation based on the engagement state obtained by the electronic component 9. At the same time, the impact frequency of the striking block 5 is increased, which is beneficial for the screwdriver to operate at high speed under light load.

[0037] Reference Figure 4 and Figure 5 In wrench mode, the clutch sleeve 4 and the striking block 5 can be engaged as a whole by sliding the adjusting piece 2. The impact tool can control the motor 7 to maintain a low first speed according to the engagement state obtained by the electronic component 9, and the striking frequency decreases, which is beneficial to the working conditions of heavy-duty low-speed operation of the wrench.

[0038] Reference Figure 2 and Figure 6 The electronic component 9 is configured to sense the engagement state through the sliding position of the adjusting member 2. Specifically, the electronic component 9 includes a Hall sensor mounted on the housing 1, and the adjusting member 2 is equipped with a first magnetic element that mates with the position of the Hall sensor. In this embodiment, the housing 1 has a mounting groove 11, the Hall sensor is located in the mounting groove 11, and the first magnetic element can be a magnet. The adjusting member 2 is annular and slidably sleeved on the outer periphery of the housing 1. When the adjusting member 2 is slidable, it can drive the first magnetic element to slide relative to the Hall sensor, thereby cooperating to obtain the engagement state of the clutch sleeve 4 and the striking block 5.

[0039] Combination Figure 6 and Figure 7 The housing 1 has a slotted hole 12, and a connecting rod 13 connects the adjusting member 2 and the switching sleeve 3. The connecting rod 13 passes through the slotted hole 12, and the extending direction of the slotted hole 12 is consistent with the operably sliding direction of the adjusting member 2. Therefore, when the adjusting member 2 slides, the connecting rod 13 can drive the switching sleeve 3 to slide, and the switching sleeve 3 can further drive the clutch sleeve 4 to slide relative to the striking block 5, so as to adjust the engagement state of the clutch sleeve 4 and the striking block 5.

[0040] Reference Figures 2 to 5 The impact tool also includes a locking element 10. The peripheral wall of the impact block 5 has a first locking groove 51, and the peripheral wall of the clutch sleeve 4 has a second locking groove 41. The impact block 5 and the clutch sleeve 4 can cooperate to move to communicate with the first locking groove 51 and the second locking groove 41. Multiple first locking grooves 51 can be arranged along the circumference of the impact block 5, and multiple second locking grooves 41 can also be arranged along the circumference of the clutch sleeve 4. The number and position of the first locking grooves 51, the second locking grooves 41, and the locking element 10 correspond one-to-one.

[0041] Reference Figure 2 and Figure 3When the impact tool is disengaged, the locking member 10 is at least partially located in the second locking groove 41, and the locking member 10 is disengaged from the first locking groove 51, and the clutch sleeve 4 is disengaged from the movement of the impact block 5. At this time, it can be used in the screwdriver mode. The clutch sleeve 4 is disengaged from the impact block 5, the weight is reduced, and the impact frequency of the impact block 5 is increased at the same time, which is beneficial to the working condition of the screwdriver under light load and high speed.

[0042] Reference Figure 4 and Figure 5 When the impact tool is engaged, the engaging member 10 is simultaneously located in both the first engaging groove 51 and the second engaging groove 41, and the engaging member 10 connects the clutch sleeve 4 and the striking block 5. This can be used in wrench mode, where the clutch sleeve 4 and the striking block 5 are engaged as a single unit, increasing weight and decreasing the striking frequency, which is beneficial for heavy-duty, low-speed wrench operation.

[0043] Reference Figure 5 The switching sleeve 3 is equipped with a second magnetic element 14, which can attract the latching member 10 to disengage from the first latching groove 51. In this embodiment, the latching member 10 can be a steel ball, and the second magnetic element 14 can be ring-shaped and installed on the switching sleeve 3 adjacent to the latching member 10. Of course, in other embodiments, the second magnetic element 14 can also be of other shapes, as long as it can attract the latching member 10 to disengage from the first latching groove 51. This is not shown in this embodiment.

[0044] When the latching member 10 is simultaneously located in the first latching slot 51 and the second latching slot 41, the latching member 10 connects the clutch sleeve 4 and the striking block 5. When it is necessary to switch modes, the switching sleeve 3 can be driven by the adjusting member 2 to move towards the motor 7, so that the second magnetic member 14 on the switching sleeve 3 can drive the latching member 10 to disengage from the first latching slot 51 and move it to be located only in the second latching slot 41. At this time, the clutch sleeve 4 disengages from the latching block and can be used in the screwdriver mode.

[0045] Reference Figure 3 An extension 31 is provided on the side of the switching sleeve 3 away from the motor 7, and a receiving space for accommodating the latching member 10 is formed between the extension 31 and the second latching groove 41. In this embodiment, the second magnetic member 14 can be fitted onto the extension 31. When the latching member 10 is only located in the second latching groove 41, the receiving space between the extension 31 and the second latching groove 41 can limit the latching member 10 between the switching sleeve 3 and the clutch sleeve 4.

[0046] Reference Figure 5The striking block 5 is provided with a positioning part 52. When the switching sleeve 3 is driven to abut against the positioning part 52, the first locking groove 51 and the second locking groove 41 are connected. By setting the positioning part 52, the clutch sleeve 4 can be accurately moved to the position where the first locking groove 51 and the second locking groove 41 are connected, so that the locking member 10 engages the clutch sleeve 4 and the striking block 5, which can be used in wrench mode.

[0047] Reference Figure 5 The clutch sleeve 4 has an abutment part 42 at one end near the motor 7. When the switching sleeve 3 moves to the abutment part 42, the clutch sleeve 4 can be pushed to disengage from the striking block 5. By providing the abutment part 42, the switching sleeve 3 can drive the clutch sleeve 4 to move towards the motor 7 to disengage from the striking block 5, thereby facilitating the switching to the screwdriver mode.

[0048] Reference Figure 1 and Figure 2 In one optional embodiment, the impact tool includes a mounting shell 15 disposed on the outer periphery of the housing 1. A push button 16 is mounted on the mounting shell 15. A limit frame 17 is provided at one end of the push button 16. Pushing the push button 16 can drive the limit frame 17 to move the adjusting member 2 along the axial direction of the housing 1, thereby adjusting its usage mode.

[0049] Reference Figures 2 to 5 The adjustment mode process of the impact tool in this application is as follows:

[0050] When switching to wrench mode, the adjusting member 2 slides towards the motor 7, driving the switching sleeve 3 to move through the locking member 10 until it abuts against the positioning part 52 of the striking block 5. At this time, the first locking groove 51 and the second locking groove 41 are connected, and the locking member 10 is simultaneously located in both the first locking groove 51 and the second locking groove 41 to lock and fix the clutch sleeve 4 and the striking block 5. At the same time, the electronic component 9 can obtain the sliding position of the adjusting member 2, and the impact tool can control the motor 7 to maintain a low first rotation speed, reducing the striking frequency, which is beneficial for the wrench's heavy-load low-speed operation.

[0051] When switching to screwdriver mode, the adjusting member 2 slides away from the motor 7, and the second magnetic member 14 attracts the locking member 10 to disengage from the first locking slot 51, remaining only in the second locking slot 41. At this time, the switching sleeve 3 abuts against the abutting part 42 of the clutch sleeve 4, driving the clutch sleeve 4 to disengage from the striking block 5. Simultaneously, the electronic component 9 can obtain the sliding position of the adjusting member 2, and the impact tool can control the motor 7 to maintain a low second rotation speed. The impact frequency of the striking block 5 is simultaneously increased, which is beneficial for the screwdriver's light-load, high-speed operation.

[0052] Therefore, the impact tool of this application can be controlled by the linkage between the engagement state of the clutch sleeve 4 and the striking block 5 and the speed of the motor 7, according to different usage modes. This allows the tool to operate at low speed under heavy load in wrench mode and at high speed under light load in screwdriver mode. Based on the speed matching of different modes, the working effect can be optimized, and the wear of the striking block 5 inside the impact tool can be significantly reduced, thereby extending the service life of the entire machine.

[0053] It will be apparent to those skilled in the art that this application is not limited to the details of the exemplary embodiments described above, and that this application can be implemented in other specific forms without departing from the spirit or essential characteristics of this application. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this application 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 application. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0054] 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. An impact tool, characterized in that, It includes a housing (1), an adjusting member (2) disposed outside the housing (1), and a switching sleeve (3), a clutch sleeve (4), a striking block (5), and a main shaft (6) disposed inside the housing (1); The switching sleeve (3) is slidably sleeved outside the clutch sleeve (4), the clutch sleeve (4) is slidably sleeved outside the striking block (5), the striking block (5) is drivenly connected to the main shaft (6), and the main shaft (6) is drivenly connected to the motor (7). The adjusting member (2) can be operably slidable so that the switching sleeve (3) drives the clutch sleeve (4) to engage or disengage from the striking block (5); The impact tool further includes an electronic component (9) that receives the engagement state of the clutch sleeve (4) and the impact block (5); the impact tool controls the motor (7) to maintain a first speed when the engagement state is engaged; the impact tool controls the motor (7) to maintain a second speed when the engagement state is disengaged; wherein the first speed is less than the second speed.

2. The impact tool according to claim 1, characterized in that, The electronic component (9) is configured to sense the engagement state by the sliding position of the adjusting member (2).

3. The impact tool according to claim 2, characterized in that, The electronic component (9) includes a Hall sensor mounted on the housing (1), and the adjusting member (2) is equipped with a first magnetic element that mates with the position of the Hall sensor.

4. The impact tool according to claim 1, characterized in that, The adjusting member (2) is annular and slidably sleeved on the outer periphery of the housing (1).

5. The impact tool according to claim 1, characterized in that, The housing (1) has a strip-shaped hole (12), and a connecting rod (13) is connected between the adjusting member (2) and the switching sleeve (3). The connecting rod (13) passes through the strip-shaped hole (12), and the extending direction of the strip-shaped hole (12) is consistent with the operably sliding direction of the adjusting member (2).

6. The impact tool according to claim 1, characterized in that, It also includes a snap-fit ​​component (10), the peripheral wall of the striking block (5) is provided with a first snap-fit ​​groove (51), the peripheral wall of the clutch sleeve (4) is provided with a second snap-fit ​​groove (41), the striking block (5) and the clutch sleeve (4) can cooperate to move to the first snap-fit ​​groove (51) and the second snap-fit ​​groove (41) to communicate. When the engagement state of the impact tool is disengaged, the snap-fit ​​member (10) is at least partially located in the second snap-fit ​​groove (41), and the snap-fit ​​member (10) is disengaged from the first snap-fit ​​groove (51), and the clutch sleeve (4) is disengaged from the movement of the impact block (5); when the engagement state of the impact tool is engaged, the snap-fit ​​member (10) is simultaneously located in the first snap-fit ​​groove (51) and the second snap-fit ​​groove (41), and the snap-fit ​​member (10) connects the clutch sleeve (4) and the impact block (5).

7. The impact tool according to claim 6, characterized in that, The switching sleeve (3) is equipped with a second magnetic element (14), which can attract the snap-fit ​​element (10) to disengage from the first snap-fit ​​groove (51).

8. The impact tool according to claim 6, characterized in that, The switching sleeve (3) has an extension (31) on the side away from the motor (7), and an accommodating space for accommodating the snap-fit ​​member (10) is formed between the extension (31) and the second snap-fit ​​groove (41).

9. The impact tool according to claim 6, characterized in that, The striking block (5) is provided with a positioning part (52). When the switching sleeve (3) is driven to abut against the positioning part (52), the first snap-fit ​​groove (51) communicates with the second snap-fit ​​groove (41).

10. The impact tool according to claim 1, characterized in that, The clutch sleeve (4) has an abutment part (42) at one end near the motor (7). When the switching sleeve (3) moves to abut the abutment part (42), the clutch sleeve (4) can be pushed to disengage from the striking block (5).

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