Electric tool full balance structure and electric tool

Abstract

The utility model provides a kind of electric tool full balance structure and electric tool, it is related to the technical field of electric tool.Electric tool full balance structure includes shell, driving part, driving gear disc, driven gear disc, counterweight and reciprocating member;Driving part is set on shell, driving gear disc and driven gear disc both rotatable are installed in shell, the output shaft of driving part is located between driving gear disc and driven gear disc and is transmission connection with driving gear disc and driven gear disc, to make output shaft can drive driving gear disc and driven gear disc both autorotation towards opposite direction;Driving gear disc and driven gear disc both detachably install counterweight;One end of reciprocating member inserted in shell is provided with driving sliding slot, eccentric transmission sliding block is provided on driving gear disc, transmission sliding block protrudes one end of driving gear disc and is slidably inserted in driving sliding slot.The technical effect of reducing the unbalance generated after introducing counterweight is achieved.

Description

Technical Field

[0001] This utility model relates to the field of power tool technology, and more specifically, to a fully balanced power tool structure and a power tool. Background Technology

[0002] Traditional reciprocating power tools are driven by motors, which produce rotary motion. The rotary motion output of the motor needs to be converted into linear reciprocating output through crank connecting rods, crank sliders, rocker arms, etc. This process inevitably introduces unbalanced forces, resulting in greater vibration and a poor user experience for this type of product.

[0003] Currently, most existing vibration reduction methods rely on adding counterweights to counteract unbalanced forces in the direction of motion. However, the added counterweights require redesigning their weight and location based on specific conditions, resulting in significant limitations in application. Furthermore, the introduced counterweights introduce their own balance issues after eliminating the imbalance of the reciprocating components. Utility Model Content

[0004] The purpose of this invention is to provide a fully balanced structure for power tools and power tools in order to alleviate the technical problem of the self-balance of the counterweight caused by the introduction of counterweights in the prior art.

[0005] In a first aspect, the present invention provides a fully balanced structure for an electric tool, comprising a housing, a driving component, a driving gear, a driven gear, a balance block, and a reciprocating component; The driving component is disposed on the housing, and both the driving gear disk and the driven gear disk are rotatably mounted inside the housing. The output shaft of the driving component is located between the driving gear disk and the driven gear disk and is connected to both the driving gear disk and the driven gear disk in a transmission connection, so that the output shaft can drive the driving gear disk and the driven gear disk to rotate in opposite directions. The balance block is detachably mounted on both the driving gear disk and the driven gear disk; The reciprocating component is inserted into the housing at one end and has a drive groove. The extension direction of the drive groove is perpendicular to the extension direction of the reciprocating component and parallel to the drive gear. A transmission slider is eccentrically arranged on the drive gear and is slidably inserted into the drive groove, protruding from one end of the drive gear.

[0006] In conjunction with the first aspect, this utility model embodiment provides a possible implementation of the first aspect, wherein the housing includes a first housing and a second housing, and both the first housing and the second housing are provided with mounting seats on their inner walls. A first bearing is provided in the mounting seat, the driving gear is mounted on the first bearing of the first housing, and the driven gear is mounted on the first bearing of the second housing.

[0007] In conjunction with the first aspect, this utility model embodiment provides one possible implementation of the first aspect, wherein the aforementioned balance block is disposed on the outer side of both the driving gear disk and the driven gear disk.

[0008] In conjunction with the first aspect, this utility model embodiment provides a possible implementation of the first aspect, wherein both the driving gear disk and the driven gear disk are provided with driving slots, the balance block is provided with a driving block, and the driving block is engaged in the driving slot.

[0009] In conjunction with the first aspect, this utility model embodiment provides a possible implementation of the first aspect, wherein a second bearing is provided on the outer side of the mounting base, and the balance block is mounted on the second bearing; The axes of the first bearing and the second bearing coincide.

[0010] In conjunction with the first aspect, this utility model embodiment provides a possible implementation of the first aspect, wherein both the driving gear disk and the driven gear disk are provided with mounting grooves, and the balance block is provided with a mounting protrusion adapted to the mounting groove.

[0011] In conjunction with the first aspect, this utility model embodiment provides a possible implementation of the first aspect, wherein a guide sleeve is fixedly disposed inside the housing, the reciprocating member is slidably inserted into the guide sleeve, a limiting pin is inserted on the guide sleeve, and the axial direction of the limiting pin is perpendicular to the axial direction of the guide sleeve. The reciprocating component has a guide groove adapted to the limiting pin, and the limiting pin is slidably inserted into the guide groove so that the reciprocating component can slide relative to the limiting pin.

[0012] In conjunction with the first aspect, this utility model embodiment provides a possible implementation of the first aspect, wherein the center of mass of the entire assembly of the aforementioned active gear disk and the transmission slider after connection falls on the rotation center of the active gear disk; The center of mass of the driven gear disk falls on the center of rotation.

[0013] In conjunction with the first aspect, this utility model embodiment provides a possible implementation of the first aspect, wherein both the driving gear disk and the driven gear disk are bevel gear disks.

[0014] Secondly, this utility model provides an electric tool, including the fully balanced structure of the electric tool.

[0015] Beneficial effects: This utility model provides a fully balanced structure for an electric tool, including a housing, a drive component, a driving gear, a driven gear, a balance block, and a reciprocating component. The drive component is mounted on the housing, and both the driving and driven gears are rotatably mounted inside the housing. The output shaft of the drive component is located between the driving and driven gears and is connected to both gears for transmission, so that the output shaft can drive the driving and driven gears to rotate in opposite directions. Balance blocks are detachably mounted on both the driving and driven gears. One end of the reciprocating component inserted into the housing has a drive groove. The extension direction of the drive groove is perpendicular to the extension direction of the reciprocating component and parallel to the driving gear. A transmission slider is eccentrically mounted on the driving gear, protruding from one end of the driving gear and slidably inserted into the drive groove.

[0016] Specifically, when the drive unit is working, its output shaft can drive the concentrically arranged drive and driven gears to rotate. The transmission slider on the drive gear can rotate with the drive gear. When the transmission slider rotates, it can slide in the drive groove of the reciprocating part and drive the reciprocating part to move back and forth. When the reciprocating part moves back and forth, the balance blocks set on the drive and driven gears can balance the imbalance caused by the back and forth movement of the reciprocating part, so that the electrician tool will not have a back and forth imbalance. Furthermore, when the drive and driven gears rotate in opposite directions, the balance blocks on the drive and driven gears rotate in opposite directions, so that the electrician tool will not have a vertical imbalance.

[0017] This utility model provides an electric tool, including a fully balanced structure. The electric tool has the advantages described above compared to existing technologies, which will not be elaborated further here. Attached Figure Description

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

[0019] Figure 1 A schematic diagram of the fully balanced structure of the power tool provided in the embodiment of this utility model; Figure 2An exploded view of the fully balanced structure of a power tool provided in this embodiment of the utility model; Figure 3 A half-sectional schematic diagram of the fully balanced structure of the power tool provided in the embodiment of this utility model; Figure 4 A schematic diagram of the drive gear in the fully balanced structure of the power tool provided in this embodiment of the utility model; Figure 5 This is a schematic diagram of the balance block in the fully balanced structure of the power tool provided in an embodiment of the present invention.

[0020] icon: 100 - Housing; 110 - First housing; 120 - Second housing; 130 - Mounting base; 140 - First bearing; 150 - Second bearing; 160 - Guide sleeve; 170 - Limit pin; 180 - Bolt; 200 - Drive component; 210 - Output shaft; 310 - Driven gear plate; 311 - Transmission slider; 320 - Driven gear plate; 330 - Drive slot; 340 - Mounting slot; 400 - Balance block; 410 - Drive block; 420 - Mounting ring; 500 - Reciprocating part; 510 - Drive slide; 520 - Guide slide. Detailed Implementation

[0021] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0022] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0023] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0024] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0025] The present invention will now be described in further detail with reference to specific embodiments and accompanying drawings.

[0026] See Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, this embodiment provides a fully balanced power tool structure, including a housing 100, a drive member 200, a driving gear 310, a driven gear 320, a balance block 400, and a reciprocating component 500. The drive member 200 is mounted on the housing 100. Both the driving gear 310 and the driven gear 320 are rotatably mounted inside the housing 100. The output shaft 210 of the drive member 200 is located between the driving gear 310 and the driven gear 320 and is connected to both of them for transmission, so that the output shaft 210 can drive the driving gear 310. The driven gear disk 310 and the driven gear disk 320 rotate in opposite directions; a balance block 400 is detachably installed on both the driven gear disk 310 and the driven gear disk 320; a drive groove 510 is provided at one end of the reciprocating component 500 inserted into the housing 100, the extension direction of the drive groove 510 is perpendicular to the extension direction of the reciprocating component 500, and the extension direction of the drive groove 510 is parallel to the driven gear disk 310; a transmission slider 311 is eccentrically provided on the driven gear disk 310, and the transmission slider 311 protrudes from one end of the driven gear disk 310 and is slidably inserted into the drive groove 510.

[0027] Specifically, when the drive unit 200 is working, the output shaft 210 of the drive unit 200 can drive the concentrically arranged drive gear disk 310 and driven gear disk 320 to rotate. The transmission slider 311 on the drive gear disk 310 can rotate with the drive gear disk 310. When the transmission slider 311 rotates, it can slide in the drive groove 510 of the reciprocating part 500 and drive the reciprocating part 500 to move back and forth. When the reciprocating part 500 moves back and forth, the balance block 400 set on the drive gear disk 310 and the driven gear disk 320 can balance the imbalance caused by the back and forth movement of the reciprocating part 500, so that the electrician tool will not have a back and forth imbalance. Furthermore, when the drive gear disk 310 and the driven gear disk 320 rotate in opposite directions, the balance block 400 on the drive gear disk 310 and the driven gear disk 320 rotate in opposite directions, so that the electrician tool will not have a vertical imbalance.

[0028] Among them, the front-to-back imbalance direction is the reciprocating direction of the reciprocating component 500, and the vertical imbalance direction is perpendicular to the reciprocating direction of the reciprocating component 500 and parallel to the drive gear 310.

[0029] It should be noted that the driving gear disk 310 and the driven gear disk 320 are the same size and are symmetrically arranged in the housing 100. The disk surfaces of the driving gear disk 310 and the driven gear disk 320 are arranged opposite each other. A balance block 400 is arranged on the side of the driving gear disk 310 away from the driven gear disk 320, and a balance block 400 is arranged on the side of the driven gear disk 320 away from the driving gear disk 310. The driving gear disk 310, the driven gear disk 320 and the two balance blocks 400 are arranged concentrically and the axial distance between them is small. Through this arrangement, the unbalanced force along the axial direction of the driving gear disk 310, the driven gear disk 320 and the two balance blocks 400 is reduced.

[0030] Both the driving gear disk 310 and the driven gear disk 320 can be bevel gear disks. A drive gear adapted to the bevel gear disk is provided on the output shaft 210 of the driving member 200, thereby transmitting the rotational power of the driving member 200 and driving both the driving gear disk 310 and the driven gear disk 320 to rotate. When the driving member 200 is working, it can drive the driving gear disk 310 and the driven gear disk 320 to rotate synchronously, but the rotation directions of the driving gear disk 310 and the driven gear disk 320 are opposite.

[0031] It should also be noted that the balance block 400 is separate from the drive gear 310 and driven gear 320. Therefore, power tools of different power can share the same set of drive gear 310 and driven gear 320 structure. Depending on the power, i.e. the weight of the reciprocating part 500, balance blocks 400 of different weights can be selected to complete the balance adjustment. This improves versatility, increases work efficiency, and reduces the cost of balance adjustment.

[0032] It should also be noted that the balance weights of the driving gear 310 and the driven gear 320 are the same.

[0033] The driving component 200 can be a rotary motor.

[0034] It should be noted that the output shaft 210 of the drive unit 200 can drive the concentrically arranged drive gear 310 and driven gear 320 to rotate simultaneously, and the drive gear 310 and driven gear 320 rotate in opposite directions from the same viewpoint.

[0035] See Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, in the optional embodiment, the housing 100 includes a first housing 110 and a second housing 120. The inner walls of both the first housing 110 and the second housing 120 are provided with mounting seats 130. A first bearing 140 is provided in the mounting seat 130. The driving gear 310 is mounted on the first bearing 140 of the first housing 110, and the driven gear 320 is mounted on the first bearing 140 of the second housing 120.

[0036] Specifically, a mounting base 130 is provided on the inner wall of both the first housing 110 and the second housing 120. A first bearing 140 is provided on the inner side of the mounting base 130. The driving gear 310 is mounted on the first bearing 140 of the first housing 110, and the driven gear 320 is mounted on the first bearing 140 of the second housing 120.

[0037] A second bearing 150 is provided on the outside of the mounting base 130, and a balance block 400 is mounted on the second bearing 150; the axes of the first bearing 140 and the second bearing 150 coincide.

[0038] The mounting base 130 is cylindrical. The outer ring of the first bearing 140 abuts against the inner wall of the mounting base 130, and the inner ring of the second bearing 150 abuts against the outer wall of the mounting base 130. This arrangement facilitates the installation of the first bearing 140 and the second bearing 150 by the user, improves assembly efficiency, and enhances the concentricity of the first bearing 140 and the second bearing 150.

[0039] It should be noted that in the actual assembly process, the second bearing 150 and the balance block 400 are installed first, followed by the first bearing 140, the driving gear 310, and the driven gear 320. Then, bolts 180 are screwed into the driving gear 310 and the driven gear 320 on the outside of the housing 100, pressing the first bearing 140, the driving gear 310, the second bearing 150, and the balance block 400 together. Under the action of bolts 180, the first bearing 140 and the second bearing 150 press against the housing 100, the balancing force presses on the second bearing 150, and the driving gear 310 and the driven gear 320 press against their respective balance blocks 400 and the first bearing 140, thereby ensuring the stable rotation of the balance block 400, the driving gear 310, and the driven gear 320.

[0040] See Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, in the optional scheme of this embodiment, both the driving gear disk 310 and the driven gear disk 320 are provided with drive slots 330, and the balance block 400 is provided with a drive block 410, which is locked in the drive slot 330.

[0041] Specifically, drive slots 330 are provided on both the drive gear disk 310 and the driven gear disk 320, and drive blocks 410 are provided on the balance block 400. Through the setting of drive slots 330 and drive blocks 410, the drive gear disk 310 and the driven gear disk 320 can drive their respective balance blocks 400 to rotate when they rotate.

[0042] See Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, in the optional scheme of this embodiment, both the driving gear disk 310 and the driven gear disk 320 are provided with mounting grooves 340, and the balance block 400 is provided with mounting protrusions 420 that are adapted to the mounting grooves 340.

[0043] Specifically, the mounting protrusion 420 on the side wall of the balance block 400 can be embedded into the mounting groove 340, improving the connection stability between the driving gear 310 and the driven gear 320 and the balance block 400.

[0044] The mounting ring 420 has a gap between its inner and outer rings and the mounting groove 340, so that the mounting ring 420 can rotate stably on the second bearing 150, and the driving gear disk 310 and the driven gear disk 320 can rotate stably on the first bearing 140, so that there is no interference between the balance block 400, the driving gear disk 310 and the driven gear disk 320.

[0045] See Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, in an optional embodiment, a guide sleeve 160 is fixedly disposed inside the housing 100, and a reciprocating component 500 is slidably inserted into the guide sleeve 160. A limiting pin 170 is inserted into the guide sleeve 160, and the axial direction of the limiting pin 170 is perpendicular to the axial direction of the guide sleeve 160. A guide groove 520 adapted to the limiting pin 170 is opened on the reciprocating component 500, and the limiting pin 170 is inserted into the guide groove 520 so that the reciprocating component 500 can slide relative to the limiting pin 170.

[0046] Specifically, when the drive component 200 drives the active gear disk 310 to rotate, the active gear disk 310 can drive the eccentrically set transmission slider 311 to rotate. When the transmission slider 311 rotates, it can move up and down in the drive groove 510 of the reciprocating component 500, thereby converting the rotation of the transmission slider 311 into the back and forth movement of the reciprocating component 500. The reciprocating component 500 slides horizontally back and forth in the guide sleeve 160, reducing the wear of the reciprocating component 500.

[0047] Furthermore, a limiting pin 170 is inserted into the guide sleeve 160, and a guide groove 520 is provided on the reciprocating part 500. When the reciprocating part 500 moves back and forth horizontally, the limiting pin 170 remains stationary, while the guide groove 520 on the reciprocating part 500 moves back and forth. The cooperation between the limiting pin 170 and the guide groove 520 enables the reciprocating part 500 to move back and forth horizontally without pitching or swaying.

[0048] It should be noted that the limiting pin 170 is fixedly inserted into the guide sleeve 160. The limiting pin 170 is fixed and can slide relative to the limiting pin 170. The limiting pin 170 improves the sliding stability of the reciprocating part 500.

[0049] See Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, in the optional scheme of this embodiment, after the active gear disk 310 and the transmission slider 311 are connected, the center of mass of the whole falls on the rotation center of the active gear disk 310; the center of mass of the driven gear disk 320 falls on the rotation center.

[0050] Specifically, the driving gear 310 and the driven gear 320 are only responsible for driving the balance block 400 to rotate, thereby completing the balance of the reciprocating part 500, so that the power tool is balanced along the front and back working direction of the reciprocating part 500, and there will be no front and back imbalance.

[0051] The center of mass of the driven gear 320 falls on its own center of rotation, thus preventing the driven gear 320 from becoming unbalanced when it rotates.

[0052] In addition, a friction-reducing sleeve is provided on the drive slide 510 or the transmission slider 311. The friction-reducing sleeve improves the smoothness of sliding between the drive slide 510 and the transmission slider 311, reducing the likelihood of wear or breakage of the transmission slider 311 after prolonged use. Furthermore, when the friction-reducing sleeve is installed on the transmission slider 311, the center of gravity of the entire assembly of the friction-reducing sleeve, the drive gear 310, and the transmission slider 311 falls on the rotation center of the drive gear 310, preventing imbalance during rotation after the assembly.

[0053] This embodiment provides a power tool, including a fully balanced power tool structure.

[0054] Specifically, the power tool provided in this embodiment has the advantages of the aforementioned fully balanced power tool structure compared to the prior art, which will not be elaborated here.

[0055] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A fully balanced structure for power tools, characterized in that, include: Housing (100), drive unit (200), drive gear (310), driven gear (320), balance block (400) and reciprocating unit (500); The drive unit (200) is disposed on the housing (100). Both the active gear disk (310) and the driven gear disk (320) are rotatably mounted inside the housing (100). The output shaft (210) of the drive unit (200) is located between the active gear disk (310) and the driven gear disk (320) and is connected to both the active gear disk (310) and the driven gear disk (320) in a transmission connection, so that the output shaft (210) can drive the active gear disk (310) and the driven gear disk (320) to rotate in opposite directions. The balance block (400) is detachably mounted on both the driving gear disk (310) and the driven gear disk (320). The reciprocating component (500) is inserted into the housing (100) at one end and has a drive groove (510). The extension direction of the drive groove (510) is perpendicular to the extension direction of the reciprocating component (500) and parallel to the drive gear (310). The drive gear (310) is eccentrically provided with a transmission slider (311). The transmission slider (311) protrudes from one end of the drive gear (310) and is slidably inserted into the drive groove (510).

2. The fully balanced power tool structure according to claim 1, characterized in that, The housing (100) includes a first housing (110) and a second housing (120). Both the first housing (110) and the second housing (120) have mounting seats (130) on their inner walls. A first bearing (140) is provided in the mounting seat (130). The driving gear (310) is mounted on the first bearing (140) of the first housing (110), and the driven gear (320) is mounted on the first bearing (140) of the second housing (120).

3. The fully balanced power tool structure according to claim 2, characterized in that, The balance block (400) is disposed on the outer side of both the driving gear disk (310) and the driven gear disk (320).

4. The fully balanced power tool structure according to claim 2, characterized in that, Both the driving gear disk (310) and the driven gear disk (320) are provided with drive slots (330), and the balance block (400) is provided with a drive block (410), which is engaged in the drive slot (330).

5. The fully balanced power tool structure according to claim 4, characterized in that, A second bearing (150) is provided on the outer side of the mounting base (130), and the balance block (400) is mounted on the second bearing (150); The axes of the first bearing (140) and the second bearing (150) coincide.

6. The fully balanced power tool structure according to claim 4, characterized in that, Both the driving gear disk (310) and the driven gear disk (320) are provided with mounting grooves (340), and the balance block (400) is provided with mounting protrusions (420) that are adapted to the mounting grooves (340).

7. The fully balanced power tool structure according to any one of claims 1-6, characterized in that, A guide sleeve (160) is fixedly provided inside the housing (100), and the reciprocating component (500) is slidably inserted into the guide sleeve (160). A limiting pin (170) is inserted into the guide sleeve (160), and the axial direction of the limiting pin (170) is perpendicular to the axial direction of the guide sleeve (160). The reciprocating component (500) has a guide groove (520) adapted to the limiting pin (170). The limiting pin (170) is inserted into the guide groove (520) so that the reciprocating component (500) can slide relative to the limiting pin (170).

8. The fully balanced power tool structure according to any one of claims 1-6, characterized in that, The center of mass of the entire assembly of the active gear disk (310) and the transmission slider (311) after they are connected falls on the rotation center of the active gear disk (310). The center of mass of the driven gear (320) falls on the center of rotation.

9. The fully balanced power tool structure according to any one of claims 1-6, characterized in that, Both the driving gear disk (310) and the driven gear disk (320) are bevel gear disks.

10. A power tool, characterized in that, Includes the power tool full balance structure as described in any one of claims 1-9.

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