Electric tool

Abstract

The utility model provides an electric tool which comprises a machine shell, a motor assembly and a transmission assembly, and the motor assembly is arranged in the machine shell. The transmission assembly is connected with a motor shaft of the motor assembly; the machine shell comprises a first shell body and a second shell body which are mutually spliced in the axial direction. The second shell comprises a first shell part and a second shell part which are mutually spliced in the radial direction, a fastener is arranged at the splicing position of the ends, close to the first shell, of the first shell part and the second shell part, and at least part of the fastener is located between the motor assembly and the wind scooper in the extending direction of the motor shaft. The fastener limits the end, close to the first shell, of the splicing position to be opened. According to the fastener of the electric tool, the situation that a two-half-type shell is prone to uneven joint closing and opening is avoided, the second shell can be plugged into the first shell more easily, the coaxiality of the second shell and the first shell is guaranteed, and therefore the coaxiality of a motor assembly and a transmission assembly is guaranteed.

Description

Technical Field

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

[0002] In existing power tools such as straight grinders, the housing of most power tools consists of a front housing and a two-part rear housing. After assembling the two housing parts (i.e., the rear housing), the two housing parts and the front housing are first inserted into each other around their circumference, and then the front housing is secured by screws into the two housing parts. During the assembly process of the housing, uneven seams are prone to occur between the two housing parts, and the openings of the two housing parts may open, causing difficulties in assembling the housing. Utility Model Content

[0003] The purpose of this utility model is to provide a power tool that solves the problem that existing power tools with two-part housings are prone to uneven seams and open openings, which makes housing assembly difficult.

[0004] To solve the above-mentioned technical problems, the present invention provides an electric tool, comprising:

[0005] chassis;

[0006] A motor assembly is disposed within the housing. The motor assembly has a motor shaft, a fan connected to the motor shaft, and an air guide shroud covering the outside of the fan. The fan rotates to draw in cooling airflow from the air inlet of the housing and discharge it from the air outlet of the housing. The air guide shroud guides the flow of cooling airflow.

[0007] A transmission assembly, wherein one end of the transmission assembly near the motor assembly is located inside the housing and connected to the motor shaft, and the motor shaft drives the transmission assembly to rotate;

[0008] The housing includes a first housing and a second housing spliced ​​together along the axial direction of the motor shaft. The second housing is provided with the motor assembly, and the first housing is provided with the transmission assembly. The second housing includes a first housing portion and a second housing portion spliced ​​together along the radial direction of the motor shaft. A fastener is provided at the splice point of the first housing portion and the second housing portion near the end of the first housing. The fastener is at least partially located between the motor assembly and the air guide in the extension direction of the motor shaft, and the fastener fixes the first housing portion and the second housing portion together.

[0009] Preferably, the fastener is disposed within the second housing.

[0010] Preferably, two clamping protrusions are provided at the joint between the first shell portion and the second shell portion. The two clamping protrusions are respectively provided on the inner surfaces of the first shell portion and the second shell portion, and the two clamping protrusions are opposite to each other in the joint direction of the first shell portion and the second shell portion.

[0011] The fastener is a fastening buckle, which includes two parallel clamping arms. The two clamping arms are spaced apart in the splicing direction of the first shell and the second shell, and the two clamping arms respectively abut against the two clamping protrusions on opposite sides that are far apart from each other.

[0012] Preferably, the fastening buckle is U-shaped and further includes a connecting arm, the two ends of which are respectively connected to the ends of the two clamping arms near the first housing.

[0013] Preferably, two limiting slots are provided on the surfaces of the two clamping arms that are close to each other, and the two limiting slots are respectively engaged with the ends of the two clamping protrusions away from the first housing.

[0014] Preferably, each of the two clamping protrusions has two notches at one end near the first housing, and the two notches are located on the surfaces of the two clamping protrusions that are close to each other.

[0015] Preferably, a snap-fit ​​slot is provided on the inner surface of the second housing, the snap-fit ​​slot penetrates the end face of the second housing near the second housing to form an insertion port for inserting the fastening snap, and the clamping protrusion protrudes from the bottom wall of the snap-fit ​​slot.

[0016] Preferably, two parallel groove protrusions are provided on the inner surface of the second housing. The two groove protrusions are respectively located on both sides of the buckle slot in the splicing direction of the first housing and the second housing. The two groove protrusions are bent and extended in a direction that approaches each other to form two anti-detachment parts. The two anti-detachment parts are respectively located on the side of the bottom wall of the groove of the two clamping arms away from the buckle slot, so as to prevent the fastening buckle from loosening through the two anti-detachment parts.

[0017] Preferably, the second housing includes an enlarged diameter portion connected to the first housing, and the fastener is disposed on the enlarged diameter portion.

[0018] Preferably, the motor assembly includes:

[0019] Stator, the stator being disposed within the second housing;

[0020] The rotor is mounted on the motor shaft and is disposed within the stator;

[0021] The fan is disposed inside the second housing, and the air guide shroud is located on the side of the fan closer to the stator.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] The second housing of the power tool of this utility model is a two-part housing formed by splicing a first housing part and a second housing part. By adding fasteners between the first housing part and the second housing part of the second housing, the first housing part and the second housing part are firmly joined together, avoiding the situation where the two-part housing is prone to uneven joints and open openings. This makes it easier for the second housing part to be inserted into the first housing part and ensures the coaxiality of the second housing part and the first housing part, which is beneficial to ensuring the coaxiality of the motor assembly and the transmission assembly installed in the housing. Attached Figure Description

[0024] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0025] Figure 1 This is a schematic diagram of the structure of the power tool in the embodiment of this utility model;

[0026] Figure 2 for Figure 1 A cross-sectional view of a power tool;

[0027] Figure 3 for Figure 2 A magnified view of a section at point A in the middle;

[0028] Figure 4 for Figure 2 A magnified view of a section at point B in the middle;

[0029] Figure 5 for Figure 1 The exploded view of the component is shown in the middle;

[0030] Figure 6 for Figure 5 A schematic diagram of the structure of the central display panel;

[0031] Figure 7 for Figure 1 Schematic diagram of the structure of the second shell in the middle;

[0032] Figure 8 for Figure 7 Exploded view of the fastener;

[0033] Figure 9 for Figure 1A schematic diagram of the structure at the connection between the first and second shells;

[0034] Figure 10 for Figure 2 Exploded view of the central transmission assembly.

[0035] Explanation of reference numerals in the accompanying drawings of this utility model:

[0036] Power tool 1000, housing 100, first housing 110, through hole 111, locking pin sleeve 112, air outlet 113, second housing 120, first grip area 121, air inlet 122, first air inlet 122a, second air inlet 122b, panel mounting groove 123, snap groove 124, first housing portion 125a, second housing portion 125b, clamping protrusion 1251, notch 1252, splicing 126, 127, 1271, 128, 128, 129, 130, 131, 140, 140a, 141, 142, 143, 200, 210, 220, 230, 240, 250, 250, 126, 127, 128, 129, 120, 120, 130, 140, 140, 140, 141, 142, 143, 200, 210, 220, 230, 240, 250, 26, 27, 28, 129, 12 ... 300, output shaft 310, lock hole 311, shaft shoulder 312, transmission shaft sleeve 320, annular groove 321, first elastic ring 330, end assembly 340, shaft locking mechanism 400, locking pin 410, annular mounting groove 411, limiting member 420, button 430, pressing part 431, pressing inclined surface 432, elastic member 440, controller 500, filter capacitor 510, switch assembly 520, micro switch 521, trigger 522, battery pack 530, display assembly 600, display panel 610, contact switch 611, transistor 612, cover 620, trigger button 621, cover buckle 622, label 630, sleeve assembly 700, sleeve 710, clearance opening 711, first bearing 720, second bearing 730, pressure plate 740, second elastic ring 750, third bearing 760.

[0037] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0038] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0039] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0040] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0041] This utility model provides an electric tool, which can be a direct grinder, etc. The following description will use an electric direct grinder as an example. Figures 1 to 10 A preferred embodiment of the power tool provided by this utility model is shown.

[0042] Please see Figure 1 , Figure 2 , Figures 7 to 9 In this embodiment, the power tool 1000 includes a housing 100, a motor assembly 200, and a transmission assembly 300. The motor assembly 200 is disposed within the housing 100. One end of the transmission assembly 300 is located within the housing 100 and connected to the motor shaft 210 of the motor assembly 200, so as to drive the transmission assembly 300 to rotate through the motor assembly 200. The housing 100 includes a first housing 110 and a second housing 120 spliced ​​together along the axial direction of the motor shaft 210. The transmission assembly 300 is disposed in one of the first housing 110 and the second housing 120, and the transmission assembly 300 is disposed in the other housing. The second housing 120 includes a first housing portion 125a and a second housing portion 125b spliced ​​together along the radial direction of the motor shaft 210. A fastener 140 is provided at the splice 126 of the first housing portion 125a and the second housing portion 125b near the end of the first housing 110, so as to limit the opening of the splice 126 near the end of the first housing 110 by the fastener 140.

[0043] Specifically, both the motor assembly 200 and the transmission assembly 300 are mounted on the housing 100, and are typically coaxial. The transmission assembly 300 is rotatably mounted on the housing 100 along its axial axis. One end of the transmission assembly 300 is located inside the housing 100 and is poweredly coupled to the motor assembly 200. The other end of the transmission assembly 300 is located outside the housing 100 and is detachably mounted with an end assembly 340. The end assembly 340 includes a rotating chuck and a working attachment. By tightening and loosening the rotating chuck, the working attachment can be installed and removed. When the motor assembly 200 is running, it drives the transmission assembly 300 to rotate, thereby causing the working attachment mounted on the transmission assembly 300 to rotate along with the transmission assembly 300. The axial direction of the transmission assembly 300 is defined as the front-to-back direction. The end of the transmission assembly 300 closer to the motor assembly 200 is the rear end of the transmission assembly 300, and the end of the transmission assembly 300 farther from the motor assembly 200 is the front end of the transmission assembly 300.

[0044] The housing 100 is formed by splicing a first housing 110 and a second housing 120 together. The first housing 110 can be used to accommodate and install the motor assembly 200, while the second housing 120 is used to accommodate and install the transmission assembly 300; alternatively, the first housing 110 can also be used to accommodate and install the transmission assembly 300, while the second housing 120 is used to accommodate and install the motor assembly 200. The following description will use the example of the first housing 110 accommodating the transmission assembly 300 and the second housing 120 accommodating the motor assembly 200. The first housing 110 and the second housing 120 can be fixed together using screws or other methods.

[0045] The first housing 110 is located in front of the second housing 120. The rear end of the transmission assembly 300 is inserted into the first housing 110, and the front end of the transmission assembly 300 extends forward beyond the first housing 110. The motor assembly 200 is mounted in the second housing 120 with the motor shaft 210 facing forward, and the front end of the motor shaft 210 extends into the first housing 110 and is connected to the rear end of the transmission assembly 300 for transmission.

[0046] The second housing 120 is a two-part housing, formed by splicing a first housing part 125a and a second housing part 125b. The splicing direction of the first housing part 125a and the second housing part 125b is defined as the left-right direction, and the side of the first housing part 125a closest to the second housing part 125b is defined as the right side of the first housing part 125a. When the first housing part 125a and the second housing part 125b are spliced, the upper end of the first housing part 125a aligns with the upper end of the second housing part 125b, and the lower end of the first housing part 125a aligns with the lower end of the second housing part 125b. This creates two splicing points 126 extending in the front-back direction at the two mating positions of the first housing part 125a and the second housing part 125b. The two splicing points 126 of the second housing 120 are vertically opposite each other, and each splicing point 126 is equipped with a fastener 140.

[0047] Fastener 140 connects the first shell 125a and the second shell 125b, and fastener 140 is located at the front end of the second shell 120. Fastener 140 can make the first shell 125a and the second shell 125b fit together firmly, avoiding uneven seams and open openings that are common in two-part shells.

[0048] The second housing 120 of the power tool 1000 of this utility model is a two-part housing formed by splicing a first housing part 125a and a second housing part 125b. By adding a fastener 140 between the first housing part 125a and the second housing part 125b of the second housing 120, the first housing part 125a and the second housing part 125b are firmly joined together, avoiding uneven seams and open openings that are common in two-part housings. This makes it easier for the second housing 120 to be inserted into the first housing 110 and ensures the coaxiality of the second housing 120 and the first housing 110, which in turn helps to ensure the coaxiality of the motor assembly 200 and the transmission assembly 300 installed in the housing 100.

[0049] Fasteners 140 are provided at the front ends of the two joints 126 of the second housing 120. The fasteners 140 can be located inside the second housing 120 or outside the second housing 120. Optionally, please refer to... Figure 2 , Figure 7 and Figure 8 In this embodiment, the fastener 140 is disposed within the second housing 120. Disposing the fastener 140 within the second housing 120 avoids the fastener 140 being exposed and affecting the appearance of the product. The following description will use the fastener 140 disposed within the second housing 120 as an example.

[0050] Fastener 140 securely connects the front end of the first housing portion 125a to the front end of the second housing portion 125b. The fastener 140 can be configured in various ways; for example, it can be a screw, rivet, pin, clamp, or clip. Optionally, please refer to [link to relevant documentation]. Figures 7 to 9 In this embodiment, two clamping protrusions 1251 are provided at the splice 126 of the first shell portion 125a and the second shell portion 125b. The two clamping protrusions 1251 are respectively protruding on the inner surfaces of the first shell portion 125a and the second shell portion 125b. The two clamping protrusions 1251 are opposite to each other in the splicing direction of the first shell portion 125a and the second shell portion 125b. The fastener 140 is a fastening buckle 140a. The fastening buckle 140a includes two parallel clamping arms 141. The two clamping arms 141 are spaced apart in the splicing direction of the first shell portion 125a and the second shell portion 125b. The two clamping arms 141 respectively abut against the two clamping protrusions 1251 on opposite sides.

[0051] Specifically, the fastener 140 is a fastening buckle 140a, which has two clamping arms 141 extending in the front-rear direction. The two clamping arms 141 are spaced apart in the left-right direction, and an opening of the fastening buckle 140a is formed between the rear ends of the two clamping arms 141. The opening of the fastening buckle 140a will deform and open when subjected to force. On the inner front surface of the first shell portion 125a and the second shell portion 125b, a clamping protrusion 1251 is provided corresponding to the splice 126. The clamping protrusion 1251 on the first shell portion 125a is the left clamping protrusion 1251, and the clamping protrusion 1251 on the second shell portion 125b is the right clamping protrusion 1251. The left clamping protrusion 1251 and the right clamping protrusion 1251 are located on the left and right sides of the splice 126, respectively.

[0052] After the fastening buckle 140a is pressed into the second housing 120, one clamping arm 141 of the fastening buckle 140a abuts against the left side of the left clamping protrusion 1251, and the other clamping arm 141 abuts against the right side of the right clamping protrusion 1251. Thus, the two clamping arms 141 of the fastening buckle 140a clamp the two clamping protrusions 1251 located at the splice 126 from the left and right, so that the first housing part 125a and the second housing part 125b are firmly joined together.

[0053] Optionally, please refer to Figures 7 to 9 In this embodiment, the fastening buckle 140a is U-shaped and also includes a connecting arm 142. The two ends of the connecting arm 142 are respectively connected to the ends of two clamping arms 141 near the first housing 110.

[0054] Specifically, the fastening buckle 140a is a U-shaped buckle, and the connecting arm 142 extends in the left and right directions. The left and right ends of the connecting arm 142 are respectively connected to the front ends of the two clamping arms 141. This fastening buckle 140a is designed in this way, making its structure relatively simple.

[0055] Optionally, please refer to Figures 7 to 9 In this embodiment, two limiting slots 143 are respectively provided on the surfaces of the two clamping arms 141 that are close to each other, and the two limiting slots 143 respectively form a snap-fit ​​engagement with the ends of the two clamping protrusions 1251 that are away from the first housing 110.

[0056] Specifically, two limiting slots 143 are respectively provided on the surfaces of the two clamping arms 141 that are close to each other, and the two limiting slots 143 are respectively located at the rear ends of the two clamping arms 141, so that the rear ends of the two clamping arms 141 have a serrated structure. The two clamping protrusions 1251 can both be arranged in the form of long strips extending in the front-back direction, and the rear ends of the two clamping protrusions 1251 respectively extend into the two limiting slots 143. In this way, the two limiting slots 143 respectively form a snap-fit ​​engagement with the rear ends of the two clamping protrusions 1251, making it difficult for the fastening buckle 140a to be released from the second housing 120.

[0057] Optionally, please refer to Figures 7 to 9 In this embodiment, two notches 1252 are respectively provided at the ends of the two clamping protrusions 1251 near the first housing 110, and the two notches 1252 are respectively located on the surfaces of the two clamping protrusions 1251 that are close to each other. The notches 1252 are provided at the front ends of the two clamping protrusions 1251, so that the front ends of the two clamping protrusions 1251 have a certain elastic deformation capability. In this way, when installing the fastening buckle 140a, it is easy for the front ends of the two clamping protrusions 1251 to enter between the two clamping arms 141 of the fastening buckle 140a.

[0058] Optionally, please refer to Figures 7 to 9 In this embodiment, a snap-fit ​​slot 127 is provided on the inner surface of the second housing 120. The snap-fit ​​slot 127 penetrates the end face of the second housing 120 near the second housing 120 to form an insertion port 1271 for inserting the fastening snap 140a. The clamping protrusion 1251 protrudes from the bottom wall of the snap-fit ​​slot 127.

[0059] Specifically, a semi-groove is provided on the inner front surface of both the first shell portion 125a and the second shell portion 125b corresponding to the splicing point 126. The semi-groove on the first shell portion 125a and the semi-groove on the second shell portion 125b are spliced ​​to form a snap-fit ​​slot 127. The opening of the snap-fit ​​slot 127 is located on the inner surface of the second shell portion 120, and the snap-fit ​​slot 127 penetrates the front front surface of the second shell portion 120, thus forming an insertion port 1271 on the front front surface of the second shell portion 120. This allows the fastening snap 140a to be inserted rearward into the snap-fit ​​slot 127 from the insertion port 1271. Thus, by providing the snap-fit ​​slot 127 on the inner surface of the second shell portion 120, the fastening snap 140a can be positioned and installed at the splicing point 126. Furthermore, the rear ends of the two clamping arms 141 of the fastening snap 140a abut against the side wall of the snap-fit ​​slot 127 away from the insertion port 1271.

[0060] Optionally, please refer to Figures 7 to 9 In this embodiment, two parallel groove protrusions 128 are provided on the inner surface of the second housing 120. The two groove protrusions 128 are respectively located on both sides of the buckle slot 127 in the splicing direction of the first housing part 125a and the second housing part 125b. The two groove protrusions 128 are bent and extended in a direction that approaches each other to form two anti-detachment parts 1281. The two anti-detachment parts 1281 are respectively located on the side of the two clamping arms 141 away from the bottom wall of the groove of the buckle slot 127, so as to prevent the fastening buckle 140a from loosening through the two anti-detachment parts 1281.

[0061] Specifically, both slotted protrusions 128 extend in the front-to-back direction. The two slotted protrusions 128 are located on the left and right sides of the slot of the buckle slot 127, respectively. The ends of the two slotted protrusions 128 away from the slot of the buckle slot 127 bend and extend to the left and right respectively and move closer to each other, thereby forming two anti-detachment parts 1281. At least a portion of the two anti-detachment parts 1281 are vertically opposite to the slot of the buckle slot 127, and the two anti-detachment parts 1281 are vertically opposite to the two clamping arms 141 of the fastening buckle 140a, thereby preventing the fastening buckle 140a from loosening out of the buckle slot 127.

[0062] Fastener 140 is located at the front end of the second housing 120. Optionally, please refer to [reference needed]. Figure 2 and Figure 7 In this embodiment, the second housing 120 includes an expanded diameter portion 129 connected to the first housing 110. The radial dimension of the expanded diameter portion 129 on the motor shaft 210 is larger than the radial dimension of other parts of the second housing 120 on the motor shaft 210. Fasteners 140 are disposed on the expanded diameter portion 129.

[0063] Specifically, the portion of the front end of the second housing 120 that connects with the first housing 110 is an enlarged diameter portion 129. The inner diameter of the enlarged diameter portion 129 is larger than the inner diameter of the portion of the second housing 120 connected to the rear side of the enlarged diameter portion 129. Installing the fastener 140 on the second housing 120 with the larger inner diameter of the enlarged diameter portion 129 not only facilitates the provision of a connection structure for the fastener 140 to be fixedly connected on the inner surface of the second housing 120, but also makes it less likely for the fastener 140 to interfere with other components installed inside the second housing 120.

[0064] Optionally, please refer to Figure 2 and Figure 10 In this embodiment, the motor assembly 200 includes a stator 220, a rotor 230, a fan 240, and a fan guide 250. The stator 220 is disposed within the second housing 120; the rotor 230 is disposed on the motor shaft 210 and is sleeved within the stator 220; the fan 240 is disposed on the motor shaft 210 and located within the second housing 120, with the fan 240 located on the side of the stator 220 closer to the first housing 110; the fan guide 250 is disposed on the motor shaft 210 and covers the fan 240, with the fan guide 250 located on the side of the fan 240 closer to the stator 220; in the axial direction of the motor shaft 210, at least a portion of the fastener 140 is located between the fan guide 250 and the rotor 230.

[0065] Specifically, viewed from the front and back, the fastener 140 is located between the air guide shroud 250 and the rotor 230. This arrangement of the fastener 140's mounting position on the second housing 120 makes it less likely that the fastener 140, the clamping protrusion 1251, and the slotted protrusion 128 will interfere with the motor assembly 200.

[0066] Optionally, please refer to Figure 1 , Figure 2 , Figure 4 and Figure 5 In this embodiment, the power tool 1000 further includes a controller 500 and a display component 600. The controller 500 is disposed inside the housing 100 and is electrically connected to the motor assembly 200. The controller 500 is located on the side of the motor assembly 200 away from the motor shaft 210 of the motor assembly 200. The display component 600 is disposed on the housing 100 and is electrically connected to the controller 500 to display the operating status of the motor assembly 200. At least a portion of the display component 600 is radially opposite to the controller 500 on the motor shaft 210.

[0067] Specifically, the controller 500 is housed within the housing 100 and located at the rear of the motor assembly 200. The controller 500 is electrically connected to the motor assembly 200, enabling control of its operation and acquisition of its operating status. A display component 600 is mounted on the rear outer surface of the housing 100. The display component 600 is electrically connected to the controller 500 and displays the motor assembly 200's speed, fault reports, and other operating statuses. This allows the operator to visually observe the motor assembly 200's operating status while using the power tool 1000.

[0068] At least a portion of the display component 600 is radially opposite the controller 500 to the motor shaft 210. Specifically, at least a portion of the display component 600, in the front-to-back upward direction, is located outside the controller 500 (i.e., on one side radially of the motor shaft 210). This radially opposite arrangement of the display component 600 and the controller 500 to the motor shaft 210 facilitates a more compact radial design of the power tool 1000. The following description will use an example where the relative direction between the at least portion of the display component 600 and the controller 500 is vertical, and the display component 600 is located above the controller 500. The at least portion of the controller 500 is typically located above the central axis of the motor shaft 210. For example, please refer to... Figure 2 In this embodiment, the controller 500 is located on the upper side of the central axis of the motor shaft 210, and the display component 600 is located on the upper side of the central axis of the motor shaft 210.

[0069] Optionally, please refer to Figure 2 and Figure 4 In this embodiment, a filter capacitor 510 is provided inside the housing 100. The filter capacitor 510 is electrically connected to the controller 500. The filter capacitor 510 and the display component 600 are located on the same side of the controller 500 in the radial direction of the motor shaft 210. The distance from the end face of the filter capacitor 510 away from the controller 500 to the controller 500 is greater than the distance from the end face of the display component 600 away from the controller 500 to the controller 500.

[0070] Specifically, the filter capacitor 510 and the display component 600 are both located on the upper side of the controller 500, and the display component 600 is located in front of or behind the filter capacitor 510. The distance from the upper surface of the display component 600 to the controller 500 is less than the distance from the upper surface of the filter capacitor 510 to the controller 500, so that the display component 600 does not exceed the upper end of the filter capacitor 510 in the vertical direction, which is beneficial to the compact design of the power tool 1000 in the vertical direction.

[0071] Optionally, please refer to Figure 1 and Figure 2In this embodiment, the housing 100 has a first gripping area 121, the motor assembly 200 and the controller 500 are respectively located on both sides of the first gripping area 121 along the axial direction of the motor shaft 210, and the display assembly 600 is located on the side of the first gripping area 121 close to the controller 500.

[0072] Specifically, the controller 500 and display component 600 are mounted on the second housing 120. A first grip area 121 is located at the rear end of the second housing 120, allowing the operator to hold the power tool 1000 with one hand while using it. The motor assembly 200 is located in front of the first grip area 121, and the controller 500 is located behind it, facilitating a compact axial design for the power tool 1000. Furthermore, a second grip area for the operator to hold the power tool 1000 is typically formed on the first housing 110.

[0073] Optionally, please refer to Figure 1 and Figure 2 In this embodiment, a portion of the display component 600 is located on the side of the controller 500 away from the first grip area 121. A portion of the display component 600 is vertically opposite the rear end of the controller 500, and another portion of the display component 600 is located on the rear side of the controller 500.

[0074] Optionally, please refer to Figure 1 and Figure 2 In this embodiment, the power tool 1000 also includes a switch assembly 520, which is disposed in the first grip area 121 and electrically connected to the controller 500. The switch assembly 520 and the display assembly 600 are respectively located on both sides of the axis of the motor shaft 210 in the radial direction of the motor shaft 210.

[0075] Specifically, the switch assembly 520 is disposed downwards on the lower side of the central axis of the motor shaft 210, and the display assembly 600 is disposed upwards on the upper side of the central axis of the motor shaft 210. This allows the operator to press and operate the switch assembly 520 within the first grip area 121 when holding the first grip area 121, and also facilitates observation of the operating status of the motor assembly 200 displayed on the display assembly 600. The switch assembly 520 can receive current and transmit it to the motor assembly 200 to operate it. The specific arrangement of the switch assembly 520 is not particularly limited. For example, in this embodiment, the switch assembly 520 is a trigger switch, comprising a micro switch 521 and a trigger 522. The trigger 522 is rotatably mounted on the housing 100 and is used by the operator to press it to turn the micro switch 521 on or off.

[0076] Optionally, please refer to Figure 1 and Figure 2 In this embodiment, a battery pack 530 is provided at one end of the housing 100 near the controller 500. The battery pack 530 is electrically connected to the controller 500. The battery pack 530 and the display component 600 are located on both sides of the axis of the motor shaft 210 in the radial direction of the motor shaft 210.

[0077] Specifically, a battery pack 530 is provided at the rear end of the housing 100, which is used to power the power tool 1000. The battery pack 530 is located below the central shaft of the motor shaft 210, and is inserted into the lower rear end of the housing 100. The insertion direction of the battery pack 530 is parallel to the central shaft of the motor shaft 210.

[0078] Optionally, please refer to Figure 1 In this embodiment, the housing 100 has an air inlet 122 near the display component 600 and an air outlet 113 near the motor component 200. The air inlet 122 is located on the second housing 120 and near the display component 600, while the air outlet 113 can be located on the second housing 120 or the first housing 110, which is beneficial for heat dissipation of the display component 600.

[0079] Optionally, please refer to Figure 1 In this embodiment, the air inlet 122 includes a first air inlet 122a, which is located on the side of the display component 600 on the axial direction of the motor shaft 210 near the air outlet 113, and at least a portion of the display component 600 is opposite to the first air inlet 122a on the axial direction of the motor shaft 210; and / or, the air inlet 122 includes a second air inlet 122b, which is provided on at least one side of the display component 600 on the radial direction of the motor shaft 210, and at least a portion of the display component 600 is opposite to the second air inlet 122b on the radial direction of the motor shaft 210.

[0080] Specifically, a display component 600 and a first air inlet 122a are disposed on the upper rear surface of the second housing 120. The first air inlet 122a is located in front of the display component 600, and at least a portion of the display component 600 is opposite to the air inlet face of the first air inlet 122a. A second air inlet 122b is disposed on the left and / or right rear side of the second housing 120, and at least a portion of the display component 600 is opposite to the air inlet face of the second air inlet 122b. This arrangement helps to improve the heat dissipation efficiency of the display component 600.

[0081] The specific style of display component 600 is not specifically limited; alternatively, please refer to [link / reference needed]. Figure 1 , Figure 5 and Figure 6In this embodiment, a panel mounting groove 123 is provided on the outer surface of the housing 100; the display component 600 includes a display panel 610, a cover 620 and a label 630. The display panel 610 is disposed in the panel mounting groove 123 and is electrically connected to the controller 500; the cover 620 is placed over the opening of the panel mounting groove 123; and the label 630 is affixed to the surface of the cover 620 away from the display panel 610.

[0082] Specifically, a panel mounting slot 123 with its opening facing upwards is provided on the rear outer surface of the housing 100. The display panel 610 is mounted in the panel mounting slot 123 with its display surface facing upwards. The shape of the display panel 610 is usually adapted to the shape of the panel mounting slot 123, thus enabling the display panel 610 to be positioned and installed on the housing 100. The cover 620 can be a transparent plate or an acrylic plate, etc., which seals the opening of the panel mounting slot 123, thus protecting the panel mounting slot 123. The label 630 serves to enhance the appearance of the display component 600.

[0083] Display panel 610 can be a transistor display panel, etc., for example, please refer to Figure 1 , Figure 5 and Figure 6 In this embodiment, the display panel 610 is a transistor display panel. The display panel 610 includes a substrate, and transistors 612 are disposed on the surface of the substrate near the cover 620.

[0084] Optionally, please refer to Figure 1 , Figure 5 and Figure 6 In this embodiment, a contact switch 611 is provided on the surface of the display panel 610 near the housing 620, and a trigger button 621 for triggering the contact switch 611 is provided on the housing 620. Thus, the operator can change the rotational speed of the motor assembly 200 by pressing the trigger button 621 to trigger the contact switch 611.

[0085] The cover 620 can be fixed in the panel mounting groove 123 by means of snap-fit ​​connection, adhesive fixation, or thread fixation. Optionally, please refer to Figure 1 , Figure 5 and Figure 6In this embodiment, a snap-fit ​​groove 124 is provided on the side wall of the panel mounting groove 123, and a cover snap-fit ​​622 is provided on the cover 620 to engage with the snap-fit ​​groove 124. The shape of the panel mounting groove 123 is adapted to the shape of the cover 620. A plurality of cover snap-fit ​​622 are provided at intervals along the circumference of the cover 620. A plurality of snap-fit ​​grooves 124 are provided on the side wall of the panel mounting groove 123. The plurality of cover snap-fit ​​622 engage with the plurality of snap-fit ​​grooves 124 respectively, thereby fixing the cover 620 in the panel mounting groove 123.

[0086] Optionally, please refer to Figures 1 to 3 In this embodiment, the power tool 1000 further includes a shaft locking mechanism 400 and a sleeve assembly 700. A through hole 111 is provided on the housing 100. The sleeve assembly 700 includes a sleeve 710, a first bearing 720, and a second bearing 730 fitted inside the housing 100. The sleeve 710 is fitted around the two ends of the transmission assembly 300 and the motor shaft 210 that are close to each other. The first bearing 720 and the second bearing 730 are respectively fitted around the motor shaft 210 and the transmission assembly 300, and the first bearing 720 and the second bearing 730 abut against the sleeve 710 on both sides axially in the transmission assembly 300. The shaft locking mechanism... 400 includes a locking pin 410, which is movably disposed at the through hole 111. One end of the locking pin 410 extends into the housing 100 from the through hole 111, and the end of the locking pin 410 away from the transmission assembly 300 is provided with a pressing part 431. When the transmission assembly 300 is in the locked state, the locking pin 410 is in the locked position, and the end of the locking pin 410 inside the housing 100 forms a limiting engagement with the transmission assembly 300 to restrict the rotation of the transmission assembly 300. When the transmission assembly 300 is in the released state, the locking pin 410 is in the released position, and the locking pin 410 is separated from the transmission assembly 300.

[0087] Specifically, the housing 100 has a through hole 111, and a press-type shaft locking mechanism 400 is provided at the through hole 111 of the housing 100. The shaft locking mechanism 400 is located on one side of the transmission assembly 300 in the radial direction. The locking pin 410 of the shaft locking mechanism 400 is movably disposed at the through hole 111 of the housing 100 along the extension direction of the locking pin 410, so that the locking pin 410 can move closer to and further away from the transmission assembly 300. The direction of movement of the locking pin 410 can be radial to the transmission assembly 300; the direction of movement of the locking pin 410 can also be inclined forward or backward relative to the radial direction of the transmission assembly 300. The following description will take the case where the direction of movement of the locking pin 410 is vertical and the locking pin 410 is located on the upper side of the transmission assembly 300 as an example.

[0088] The upper end of the locking pin 410 is provided with a pressing part 431, so that the operator can press the pressing part 431 to drive the locking pin 410, which is in the release position, downward to the locking position. The lower end of the locking pin 410 extends into the housing 100 through the through hole 111. When the locking pin 410 is in the locked position, the lower end of the locking pin 410 forms a limiting engagement with the transmission component 300, thereby restricting the rotation of the transmission component 300. At this time, the transmission component 300 is locked and is in a locked state. When the locking pin 410 is in the release position, the lower end of the locking pin 410 separates from the transmission component 300, so that the limiting engagement between the lower end of the locking pin 410 and the transmission component 300 is released. At this time, the transmission component 300 is unlocked and is in a released state, and the motor assembly 200 can normally drive the transmission component 300 to rotate.

[0089] A sleeve assembly 700 is provided between the motor assembly 200 and the transmission assembly 300. The sleeve assembly 700 includes a sleeve 710, a first bearing 720, and a second bearing 730 arranged coaxially. The first bearing 720 is located on the rear side of the transmission assembly 300 and is sleeved on the outside of the motor shaft 210. The second bearing 730 is located on the front side of the motor assembly 200 and is sleeved on the outside of the transmission assembly 300. The sleeve 710 is located between the first bearing 720 and the second bearing 730. The first bearing 720 abuts against the rear side of the sleeve 710, and the second bearing 730 abuts against the front side of the sleeve 710. In this way, the sleeve assembly 700 can ensure the coaxiality between the motor assembly 200 and the transmission assembly 300, and allow the motor assembly 200 to smoothly drive the transmission assembly 300 to rotate.

[0090] Locking pin 410 can be located on the front side of sleeve 710; locking pin 410 can also be located on the rear side of sleeve 710; locking pin 410 can also be at least partially vertically opposed to sleeve 710. Optionally, please refer to Figure 2 and Figure 3 In this embodiment, the locking pin 410 and the sleeve 710 are opposite each other in the direction of movement of the locking pin 410. The sleeve 710 is provided with a relief opening 711 that communicates with the through hole 111. The end of the locking pin 410 near the transmission assembly 300 extends into the sleeve 710 from the relief opening 711.

[0091] Specifically, the locking pin 410 and the front end of the sleeve 710 are vertically aligned. The front end of the sleeve 710 has an upward-facing clearance opening 711 that penetrates the front end face of the sleeve 710. The locking pin 410 and the clearance opening 711 are vertically aligned, and when the locking pin 410 is in the released position, the lower end of the locking pin 410 extends into the sleeve 710 from the clearance opening 711. This arrangement facilitates a compact vertical design of the power tool 1000. The following description will use the example of the lower end of the locking pin 410 being located inside the sleeve 710.

[0092] Optionally, please refer to Figure 2 and Figure 3 In this embodiment, the shaft locking mechanism 400 further includes a limiting member 420, which is disposed at one end of the locking pin 410 located inside the housing 100. The limiting member 420 is at least partially located inside the sleeve 710 or the clearance opening 711. When the locking pin 410 is in the released position, the limiting member 420 abuts against the inner side of the housing 100 to prevent the locking pin 410 from popping out of the housing 100.

[0093] Specifically, the limiting member 420 of the shaft locking mechanism 400 is located inside the housing 100, and the limiting member 420 is detachably disposed at the lower end of the locking pin 410, so that the limiting member 420 can move up and down together with the locking pin 410. When the locking pin 410 is in the released position, the limiting member 420 abuts against the inner surface of the housing 100 to prevent the locking pin 410 from popping upward out of the housing 100.

[0094] When the locking pin 410 is in the released position, the limiting member 420 can be located within the clearance opening 711; the limiting member 420 can also be partially located within the clearance opening 711 and partially located within the sleeve 710; or the limiting member 420 can also be located within the sleeve 710.

[0095] The locking pin 410 is directly assembled with the through hole 111 of the housing 100. The locking pin 410 can be installed from the outside of the housing 100 into the through hole 111. After the lower end of the locking pin 410 passes through the through hole 111 into the housing 100, the limiting member 420 is installed from the inside of the housing 100 onto the lower end of the locking pin 410 to prevent the locking pin 410 from popping out of the housing 100. This simplifies the shaft lock structure of the power tool 1000, reducing assembly and material costs.

[0096] The specific configuration of the limiting component 420 can be set according to the actual situation. For example, the limiting component 420 can be a nut, screw, pin, or retaining ring, etc. Optionally, please refer to... Figures 1 to 3 In this embodiment, the limiting member 420 is an open retaining ring, and the locking pin 410 has an annular mounting groove 411 at one end inside the housing 100. The open retaining ring is disposed at the annular mounting groove 411. By providing an annular mounting groove 411 at the lower end of the locking pin 410, and clamping the open retaining ring in the annular mounting groove 411, and by ensuring that the outer diameter of the open retaining ring is larger than the diameter of the through hole 111, the open retaining ring can be installed from inside the housing 100 to the lower end of the locking pin 410, making the installation of the open retaining ring more convenient.

[0097] The upper end of the locking pin 410 is provided with a pressing part 431. The specific arrangement of the pressing part 431 can be set according to the actual situation. For example, the upper end of the locking pin 410 can be directly used as the pressing part 431; alternatively, a separate component can be provided as the pressing part 431 at the upper end of the locking pin 410. Optionally, please refer to Figures 1 to 3 In this embodiment, a button 430 is provided at the end of the locking pin 410 away from the transmission component 300, and a pressing part 431 is provided at the part of the button 430 outside the housing 100; an elastic element 440 is provided at the end of the locking pin 410 away from the transmission component 300, and the two ends of the elastic element 440 abut against the button 430 and the housing 100 respectively, so that the locking pin 410 can be moved and reset to the release position through the elastic element 440.

[0098] Specifically, a button 430 is provided at the upper end of the locking pin 410. When the locking pin 410 is in the released position, at least a portion of the button 430 is located outside the housing 100, and the portion of the button 430 located outside the housing 100 forms a pressing part 431 for the operator to press. The button 430 can be integrally formed with the locking pin 410; the button 430 can also be fixedly installed on the upper end of the locking pin 410 by means of snap-fit ​​connection, threaded connection, or other methods.

[0099] A spring or other elastic element 440 is fitted onto the upper end of the locking pin 410, and the elastic element 440 is located below the button 430. The upper and lower ends of the elastic element 440 abut against the button 430 and the housing 100, respectively. When the operator presses down on the button 430, the button 430 can move the locking pin 410, which is in the release position, downward to the locked position, at which time the elastic element 440 is compressed. When the operator releases the button 430, the rebound of the elastic element 440 can automatically move the locking pin 410, which is in the locked position, upward to return to the release position. In this way, by pressing the button 430 and the rebound of the elastic element 440, the locking and unlocking of the transmission component 300 can be achieved. The following description will use the example of the locking pin 410 having a button 430 and an elastic element 440 at its upper end.

[0100] The housing 100 has a through hole 111. Specifically, the sleeve assembly 700 is disposed within the first housing 110, and the first housing 110 has a through hole 111. Optionally, please refer to... Figures 1 to 3 In this embodiment, the outer sleeve 130 is fitted over the first housing 110, and the outer sleeve 130 has a clearance hole 131 that communicates with the through hole 111; the end of the button 430 near the transmission component 300 is located inside the clearance hole 131, and the end of the button 430 away from the transmission component 300 is located outside the clearance hole 131 to form a pressing part 431.

[0101] Specifically, the outer casing 130 has a clearance hole 131 corresponding to the through hole 111. The clearance hole 131 on the outer casing 130 is vertically aligned with the through hole 111 on the first housing 110. The lower end of the locking pin 410 passes through the clearance hole 131 and the through hole 111 in sequence and then extends into the first housing 110. The upper end of the locking pin 410 is located inside the clearance hole 131 or extends upward out of the clearance hole 131. The lower end of the button 430 is located inside the clearance hole 131. When the locking pin 410 is in the released position, the upper end of the button 430 extends upward out of the clearance hole 131 to form a pressing part 431.

[0102] Optionally, please refer to Figures 1 to 3 In this embodiment, the shape of the portion of button 430 located within the clearance hole 131 is adapted to the shape of the clearance hole 131. The shape of the lower end of button 430 is adapted to the shape of the clearance hole 131, so that the lower end of button 430 abuts against the inner surface of clearance hole 131, thereby improving the stability of shaft locking mechanism 400.

[0103] Optionally, please refer to Figures 1 to 3 In this embodiment, the pressing part 431 is provided with a pressing slope 432 facing away from the motor assembly 200. The pressing slope 432 is inclined in the direction away from the motor assembly 200 in the direction close to the transmission assembly 300. The pressing slope 432 is provided at the front end of the pressing part 431 and is inclined forward from top to bottom. By providing the pressing slope 432 on the pressing part 431, the comfort of the operator when pressing the button 430 can be improved.

[0104] The upper and lower ends of the elastic element 440 abut against the button 430 and the housing 100, respectively. The lower end of the elastic element 440 can abut against the outer surface of the first housing 110; the lower end of the elastic element 440 can also abut against the outer surface of the outer sleeve 130. Optionally, please refer to... Figures 1 to 3 In this embodiment, one end of the elastic member 440 near the transmission assembly 300 passes through the clearance hole 131 and abuts against the first housing 110. The lower end of the elastic member 440 extends into the clearance hole 131 and abuts against the outer surface of the first housing 110. Thus, the clearance hole 131 can limit the elastic member 440 and prevent the elastic member 440 from becoming loose.

[0105] Optionally, please refer to Figure 2 and Figure 3 In this embodiment, a locking pin sleeve 112 is provided in the through hole 111. The locking pin sleeve 112 is sleeved outside the locking pin 410. One end of the locking pin sleeve 112 near the transmission assembly 300 is located in the relief opening 711 or extends into the sleeve 710 from the relief opening 711. When the locking pin 410 is in the released position, the limiting member 420 abuts against the locking pin sleeve 112.

[0106] Specifically, a locking pin sleeve 112 is provided inside the through hole 111 to prevent the locking pin 410 from directly contacting the inner surface of the through hole 111. This prevents the through hole 111 from being impacted and enlarged when the locking pin 410 is abnormally pressed and locked during a slow stop of the transmission assembly 300, thus avoiding failure of the shaft lock function. The lower end of the through hole 111 can be located inside the through hole 111; the lower end of the through hole 111 can also be located inside the clearance opening 711; or the lower end of the through hole 111 can also be located inside the sleeve 710.

[0107] The locking pin sleeve 112 can be fixedly installed in the through hole 111 by means of snap-fit ​​connection, threaded connection, or interference fit. Optionally, please refer to Figures 1 to 3 In this embodiment, a threaded connection structure is provided between the outer surface of the locking pin sleeve 112 and the inner surface of the through hole 111. For example, the locking pin sleeve 112 can be a nut. The outer surface of the locking pin sleeve 112 is provided with an external thread, and the inner surface of the through hole 111 is provided with an internal thread that mates with the external thread. In this way, the locking pin sleeve 112 and the housing 100 are locked and fixed by the thread.

[0108] Optionally, please refer to Figures 1 to 3 In this embodiment, the upper end of the locking pin sleeve 112 is located inside the clearance hole 131, and an annular boss protrudes from the outer surface of the upper end of the locking pin sleeve 112, which abuts against the upper side of the upper edge of the through hole 111. Thus, by limiting the locking pin sleeve 112 with the upper edge of the through hole 111, the locking pin sleeve 112 can be positioned and installed in the through hole 111.

[0109] When the locking pin 410 is in the released position, the limiting member 420 can abut against the lower side of the inner surface of the first housing 110; the limiting member 420 can also abut against the lower side of the lower end face of the locking pin sleeve 112. Optionally, please refer to Figures 1 to 3 In this embodiment, when the locking pin 410 is in the released position, the limiting member 420 abuts against the locking pin sleeve 112.

[0110] When the transmission assembly 300 is in the locked state, the lower end of the locking pin 410 forms a limiting engagement with the transmission assembly 300. Optionally, please refer to Figures 1 to 3 In this embodiment, the transmission assembly 300 is provided with a locking hole 311; when the transmission assembly 300 is in the locked state, one end of the locking pin 410 located inside the housing 100 extends into the locking hole 311. In this way, the rotation of the transmission assembly 300 is restricted by the insertion and cooperation of the locking pin 410 and the locking hole 311, and the transmission assembly 300 can be locked well by the shaft locking mechanism 400.

[0111] Optionally, please refer to Figure 2 , Figure 3 and Figure 10In this embodiment, the transmission assembly 300 includes an output shaft 310 and a transmission shaft sleeve 320. One end of the output shaft 310 near the motor assembly 200 is located inside the housing 100. The second bearing 730 is sleeved on the outside of the output shaft 310. The output shaft 310 is provided with a shoulder 312 facing the motor shaft 210. The transmission shaft sleeve 320 is located between the motor shaft 210 and the output shaft 310. Both ends of the transmission shaft sleeve 320 are respectively sleeved on the outside of the motor shaft 210 and the output shaft 310, so that when the motor shaft 210 rotates, the output shaft 310 is driven to rotate through the transmission shaft sleeve 320. The shoulder 312 and the first bearing 720 respectively abut against the two sides of the transmission shaft sleeve 320 in the axial direction of the transmission assembly 300.

[0112] Specifically, the front end of the output shaft 310 is used to mount the end assembly 340, and the rear end of the output shaft 310 is connected to the front end of the motor shaft 210 via a transmission sleeve 320. A locking hole 311 is provided at the rear end of the output shaft 310, located between the second bearing 730 and the transmission sleeve 320. Flat rectangular structures are provided between the rear end of the output shaft 310 and the front end of the transmission sleeve 320, and between the front end of the motor shaft 210 and the rear end of the transmission sleeve 320, thereby enabling the output shaft 310 to rotate via the transmission sleeve 320 when the motor shaft 210 rotates.

[0113] The output shaft 310 has a rearward-facing shoulder 312 at its rear end. The shoulder 312 abuts against the front end of the drive shaft sleeve 320, thereby achieving a front-back upward mounting position for the shoulder 312 and the drive shaft sleeve 320. Optionally, please refer to... Figure 2 , Figure 3 and Figure 10 In this embodiment, an annular groove 321 is provided on the end face of the transmission shaft sleeve 320 near the second bearing 730. A first elastic ring 330 is provided in the annular groove 321, and the first elastic ring 330 is clamped between the shoulder 312 and the bottom wall of the annular groove 321. The first elastic ring 330 can be an O-ring or the like. An annular groove 321 is provided on the front end face of the transmission shaft sleeve 320, and the first elastic ring 330 is provided in the annular groove 321. The first elastic ring 330 is disposed on the shoulder 312 and is wrapped by the transmission shaft sleeve 320. The first elastic ring 330 abuts against the shoulder 312 and the transmission shaft sleeve 320, so that the transmission shaft sleeve 320 has a certain amount of movement in the front and rear directions, so that the transmission shaft sleeve 320 is not completely limited and is floating in the front and rear directions, which helps to reduce the vibration of the power tool 1000.

[0114] The inner surface of the first housing 110 is provided with a rearward annular stop surface, which abuts against the front side of the second bearing 730. The front end of the transmission shaft sleeve 320 abuts against the rear side of the second bearing 730, thereby realizing the front-back upward mounting and positioning of the second bearing 730. The second bearing 730 and the output shaft 310 can be in a small clearance fit.

[0115] Optionally, please refer to Figure 2 and Figure 3 In this embodiment, a pressure plate 740 is provided on the first housing 110, and the pressure plate 740 abuts against the side of the first bearing 720 away from the sleeve 710.

[0116] Specifically, the pressure plate 740 is located inside the rear end of the first housing 110, and the pressure plate 740 can be fixed to the first housing 110 by means of screws or other methods. The rear end of the transmission shaft sleeve 320 abuts against the front side of the first bearing 720, and the pressure plate 740 abuts against the rear side of the first bearing 720, thereby realizing the front-back upward mounting and positioning of the first bearing 720. The first bearing 720 and the output shaft 310 can be in a small clearance fit. The first bearing 720 is pressed into the first housing 110, and the rear end of the first bearing 720 is locked to the pressure plate 740 by screws to restrict its front-back movement.

[0117] Optionally, please refer to Figure 2 and Figure 3 In this embodiment, a second elastic ring 750 is fitted between the housing 100 and the first bearing 720. The first housing 110 and the first bearing 720 are interference-fitted and equipped with the second elastic ring 750, which can play a role in shock absorption. The second elastic ring 750 can be an O-ring or the like.

[0118] Optionally, please refer to Figure 1 and Figure 2 In this embodiment, a third bearing 760 is fitted between the end of the transmission assembly 300 away from the motor assembly 200 and the housing 100.

[0119] Specifically, one or more third bearings 760 are sleeved on the front end of the output shaft 310. For example, in this embodiment, two third bearings 760 are sleeved on the front end of the output shaft 310. The third bearings 760 and the output shaft 310 are interference-fitted, ensuring the coaxiality of the output shaft 310 and the stability during use. The third bearings 760 are fixed inside the front end of the first housing 110, and the axial movement of the third bearings 760 can be restricted by snap rings or the like.

[0120] The above are merely preferred embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural transformations made based on the inventive concept of this utility model and the contents of this utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this utility model.

Claims

1. A power tool, characterized in that, include: chassis; A motor assembly is disposed within the housing. The motor assembly has a motor shaft, a fan connected to the motor shaft, and an air guide shroud covering the outside of the fan. The fan rotates to draw in cooling airflow from the air inlet of the housing and discharge it from the air outlet of the housing. The air guide shroud guides the flow of cooling airflow. A transmission assembly, wherein one end of the transmission assembly near the motor assembly is located inside the housing and connected to the motor shaft, and the motor shaft drives the transmission assembly to rotate; The housing includes a first housing and a second housing spliced ​​together along the axial direction of the motor shaft. The second housing is provided with the motor assembly, and the first housing is provided with the transmission assembly. The second housing includes a first housing portion and a second housing portion spliced ​​together along the radial direction of the motor shaft. A fastener is provided at the splice point of the first housing portion and the second housing portion near the end of the first housing. The fastener is at least partially located between the motor assembly and the air guide in the extension direction of the motor shaft, and the fastener fixes the first housing portion and the second housing portion together.

2. The power tool as described in claim 1, characterized in that, The fastener is disposed within the second housing.

3. The power tool as described in claim 2, characterized in that, Two clamping protrusions are provided at the joint between the first shell part and the second shell part. The two clamping protrusions are respectively protruding on the inner surfaces of the first shell part and the second shell part, and the two clamping protrusions are opposite to each other in the joint direction of the first shell part and the second shell part. The fastener is a fastening buckle, which includes two parallel clamping arms. The two clamping arms are spaced apart in the splicing direction of the first shell and the second shell, and the two clamping arms respectively abut against the two clamping protrusions on opposite sides that are far apart from each other.

4. The power tool as described in claim 3, characterized in that, The fastening buckle is U-shaped and also includes a connecting arm, the two ends of which are respectively connected to the two clamping arms near the first housing.

5. The power tool as described in claim 3, characterized in that, Two limiting slots are respectively provided on the surfaces of the two clamping arms that are close to each other, and the two limiting slots respectively form a snap-fit ​​engagement with the ends of the two clamping protrusions away from the first housing.

6. The power tool as described in claim 3, characterized in that, Two notches are provided at the ends of the two clamping protrusions near the first housing, and the two notches are located on the surfaces of the two clamping protrusions that are close to each other.

7. The power tool as described in claim 3, characterized in that, The inner surface of the second housing is provided with a snap-fit ​​slot, which penetrates the end face of the second housing near the second housing to form an insertion port for inserting the fastening snap-fit. The clamping protrusion protrudes from the bottom wall of the snap-fit ​​slot.

8. The power tool as claimed in claim 7, characterized in that, The inner surface of the second housing has two parallel groove protrusions. The two groove protrusions are respectively located on both sides of the buckle slot in the splicing direction of the first housing and the second housing. The two groove protrusions are bent and extended in a direction that approaches each other to form two anti-detachment parts. The two anti-detachment parts are respectively located on the side of the bottom wall of the groove of the two clamping arms away from the buckle slot, so as to prevent the fastening buckle from loosening through the two anti-detachment parts.

9. The power tool as claimed in claim 1, characterized in that, The second housing includes an enlarged diameter portion connected to the first housing, and the fastener is disposed on the enlarged diameter portion.

10. The power tool as claimed in claim 1, characterized in that, The motor assembly includes: Stator, the stator being disposed within the second housing; The rotor is mounted on the motor shaft and is disposed within the stator; The fan is disposed inside the second housing, and the air guide shroud is located on the side of the fan closer to the stator.

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