Anti-breaking electric tool housing and electric tool

Abstract

This invention discloses a fracture-resistant power tool housing and a power tool. The fracture-resistant power tool housing includes a grip, a housing, a support, and a reinforcing assembly. The housing is located at the top of the grip and has a hollow cavity in which the power tool components are housed. The support is fixedly connected to the grip and extends axially along the housing, supporting the components extending out of the housing. An installation space is formed between the support and the lower wall of the housing. The reinforcing assembly is disposed within the installation space and fixed to or integrally formed with the support. The reinforcing assembly includes a support shell with an assembly space, multiple protruding walls extending from the inner wall of the support shell, and a reinforcing plate disposed within the assembly space and abutting against the protruding walls, for dispersing the impact force received by the power tool housing. This power tool housing can disperse impact force and prevent fracture.

Description

Technical Field

[0001] This invention belongs to the field of power tool technology, specifically relating to a break-resistant power tool housing and a power tool. Background Technology

[0002] Handheld power tools typically consist of an upper housing that houses the motor and gearbox, and a grip for the operator to hold. The upper housing and grip are generally connected by a horizontally extending housing section. This horizontal housing serves to support and secure the gearbox, and also mates with the grip to mount components such as push-button switches. Due to limitations in the internal transmission component layout, switch installation requirements, and compact overall design, this horizontal housing section often has thin walls or open structures, resulting in relatively weak overall strength and becoming a vulnerable point in the housing structure. In actual use, it is difficult to completely avoid the power tool being accidentally dropped. The impact load from the drop can easily act on this horizontal housing section between the upper housing and the grip, causing the housing to break. Once this section breaks, not only will the gearbox lose reliable support and shift or become damaged, but the switch will also fail, seriously affecting the functionality and safety of the power tool.

[0003] The information disclosed in this background section is intended only to enhance the understanding of the overall background of the invention and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Summary of the Invention

[0004] The purpose of this invention is to provide a fracture-resistant power tool housing that can disperse impact force and prevent breakage at the weak points of the power tool housing.

[0005] To achieve the above objectives, a specific embodiment of the present invention provides a fracture-resistant power tool housing, comprising a grip, a receiving portion, a supporting portion, and a reinforcing component. The receiving portion is disposed at the top end of the grip and has a hollow receiving cavity, within which a component of the power tool is disposed. The supporting portion is fixedly connected to the grip and extends axially along the receiving portion, serving to support components extending out of the receiving cavity. An installation space is formed between the supporting portion and the lower wall of the receiving portion. The reinforcing component is disposed within the installation space and fixed to the supporting portion or integrally formed with the supporting portion. The reinforcing component includes a support shell with an assembly space, multiple protruding walls extending from the inner wall of the support shell, and a reinforcing plate disposed within the assembly space and abutting against the multiple protruding walls, for dispersing impact forces received by the power tool housing.

[0006] In one or more embodiments of the present invention, the support shell includes a horizontal extension section and a protruding section extending upward from the horizontal extension section, the horizontal extension section and the protruding section abutting against the receiving portion or component to support the component; the assembly space passes through the horizontal extension section and the protruding section, and the reinforcing plate is disposed in the assembly space and extends along the assembly space.

[0007] In one or more embodiments of the present invention, the plurality of protruding walls includes: a first protruding wall extending upward from the bottom wall of the protruding section and a second protruding wall extending upward from the bottom wall of the horizontally extending section. The reinforcing plate abuts against the first and second protruding walls to disperse the impact force.

[0008] In one or more embodiments of the present invention, the reinforcing plate includes a first horizontal segment, a first vertical segment, a second horizontal segment, and a second vertical segment. The first vertical segment extends downward from one end of the first horizontal segment; the second horizontal segment extends horizontally from the bottom end of the first vertical segment in a direction opposite to the extension direction of the first horizontal segment; the second vertical segment extends downward from the end of the second horizontal segment away from the first vertical segment; the first horizontal segment, the first vertical segment, the second horizontal segment, and the second vertical segment are sequentially connected to form a stepped structure.

[0009] In one or more embodiments of the present invention, the first horizontal segment and the first vertical segment are disposed within the protruding segment and abut against the first protruding wall.

[0010] In one or more embodiments of the present invention, a first gap is formed between the top end of the first protruding wall and the top wall of the protruding segment, the upper surface of the first horizontal segment abuts against the top wall of the protruding segment, and the lower surface abuts against the top end of the protruding wall.

[0011] In one or more embodiments of the present invention, a second gap is formed between the sidewall of the first protruding wall and the sidewall of the protruding segment, and the two sides of the first vertical segment abut against the sidewall of the first protruding wall and the sidewall of the protruding segment, respectively.

[0012] In one or more embodiments of the present invention, the second horizontal segment and the second vertical segment are disposed within the horizontal extension segment and abut against the second protruding wall.

[0013] In one or more embodiments of the present invention, a third gap is formed between the top end of the second protruding wall and the top wall of the horizontal extension segment, and the upper and lower surfaces of the second horizontal segment abut against the top wall of the horizontal extension segment and the top end of the second protruding wall, respectively.

[0014] In one or more embodiments of the present invention, a fourth gap is provided between the sidewall of the second protruding wall and the sidewall of the horizontal extension, and the two sides of the second vertical section abut against the sidewall of the second protruding wall and the sidewall of the horizontal extension, respectively.

[0015] In one or more embodiments of the present invention, the end of the first horizontal segment abuts against the side wall of the protruding segment; the end of the second vertical segment abuts against the bottom wall of the horizontal extension segment.

[0016] Compared with existing technologies, the reinforcing assembly of the power tool housing of this invention integrates a support shell, a specific-shaped reinforcing plate, and a protruding wall. The multi-segment structure of the support shell and its contact with the housing and components greatly increase the load-bearing area and force transmission path. The stepped reinforcing plate, the protruding wall, and the multi-faceted clearance fit and contact with the inner wall of the support shell form a complex stress-bearing structure. When the power tool is dropped and impacted, the impact force is transmitted, redirected, and dispersed through the layers of this stress-bearing structure. The originally concentrated impact force is efficiently decomposed into smaller impact forces in multiple directions, and is ultimately borne by the more robust housing and gripping parts. This not only completely solves the problem of easy breakage of the load-bearing part, but also enhances the positional stability of core components such as the gearbox under dynamic impact due to the overall enveloping support of the reinforcing assembly 4, significantly improving the reliability and service life of the power tool under extreme working conditions.

[0017] Another specific embodiment of the present invention provides a breakage-resistant power tool, which includes a breakage-resistant power tool housing as described in any of the above embodiments, a motor, a gearbox, and a control component disposed within the power tool housing.

[0018] Compared with existing technologies, this power tool has better stability, the housing is less prone to breakage, and it significantly improves the reliability and service life of the power tool under extreme working conditions. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a first perspective view of a power tool housing according to an embodiment of the present invention;

[0021] Figure 2 This is an exploded view of the housing of a power tool according to an embodiment of the present invention;

[0022] Figure 3This is a perspective view of the support shell in one embodiment of the present invention;

[0023] Figure 4 This is an exploded view of the support shell and reinforcing plate in one embodiment of the present invention;

[0024] Figure 5 This is an internal structural diagram of the support shell and reinforcing plate in one embodiment of the present invention;

[0025] Figure 6 This is an assembly diagram of the support shell and the reinforcing plate in one embodiment of the present invention;

[0026] Figure 7 This is a schematic diagram of a power tool according to an embodiment of the present invention.

[0027] Explanation of key figure labels:

[0028] 1-Holding part, 2-Accommodation part, 21-Accommodation cavity, 3-Bearing part, 31-Mounting space, 4-Reinforcing component, 41-Protruding wall, 411-First protruding wall, 412-Second protruding wall, 42-Reinforcing plate, 421-First horizontal section, 422-First vertical section, 423-Second horizontal section, 424-Second vertical section, 43-Support shell, 431-Horizontal extension section, 432-Protruding section, 433-Assembly space, 444-Connecting column, 44-First gap, 45-Second gap, 46-Third gap, 47-Fourth gap, 5-Gearbox, 6-Control button. Detailed Implementation

[0029] To enable those skilled in the art to better understand the technical solutions in this disclosure, the technical solutions in the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. Based on the embodiments in this disclosure, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this disclosure.

[0030] like Figure 1 As shown, an embodiment of the present invention provides a break-resistant power tool housing, which is particularly suitable for power tools such as handheld drills and impact wrenches that have a transitional connection area between the upper housing and the grip portion 1. The housing includes a grip portion 1, a receiving portion 2, and a supporting portion 3.

[0031] The grip portion 1 is for operation to hold with one or both hands, and may contain switches, speed control circuits, etc. The accommodating portion 2 is located at the top of the grip portion 1, extending generally horizontally, and forms a hollow accommodating cavity 21 to house the motor and at least part of the gearbox 5 (see [reference]). Figure 7The output end of the gearbox 5 typically extends from the front opening of the accommodating cavity 21. A support portion 3 is located between the holding portion 1 and the accommodating portion 2. This support portion 3 is connected to the upper part of the holding portion 1 and extends along the axial direction (i.e., approximately horizontal direction) of the accommodating portion 2, thus forming a horizontal support structure. The support portion 3 is used to support components extending out of the accommodating cavity 21; that is, components such as the gearbox 5 are rested or pressed against the upper surface of the support portion 3. An installation space 31 is formed between the support portion 3 and the bottom wall of the accommodating portion 2.

[0032] In handheld power tools, the support unit 3 serves both to support the gearbox 5 and to cooperate with the grip unit 1 to mount components such as push-button switches. In some power tools, the support unit 3 itself is equipped with a control button 6 (see...). Figure 3 The overall strength is relatively weak. If the power tool is accidentally dropped and lands on the ground, it is prone to causing the load-bearing part 3 to break. Therefore, if... Figure 2 As shown, in one embodiment of the present invention, a reinforcing component 4 is provided in the installation space 31. The reinforcing component 4 is connected to the side wall of the installation space 31 and forms an integral part with the support part 3. That is, the upper surface of the reinforcing component 4 is substantially flush with the upper surface of the support part 3 and is fastened together to jointly support the parts extending out of the receiving cavity 21.

[0033] like Figures 3 to 5 As shown, the reinforcing component 4 includes a support shell 43, which has an assembly space 433 inside. Multiple protruding walls 41 protrude from the inner wall of the support shell 43, extending vertically or horizontally within the assembly space 433. A reinforcing plate 42 is also provided within the assembly space 433, abutting against the multiple protruding walls 41. Preferably, the reinforcing plate 42 is made of metal, such as steel.

[0034] Multiple protruding walls 41 extending from the inner wall of the self-supporting shell 43 constitute an impact force dispersion structure. The reinforcing plate 42 abuts against the multiple protruding walls 41, thereby dispersing the impact force received by the power tool during operation or when it is dropped, and reducing the stress concentration of the bearing part 3.

[0035] The load-bearing portion of existing power tool housings is typically hollow or lacks additional reinforcement, making them prone to breakage under impact during use. The breakage-resistant power tool housing of this invention utilizes a reinforcement assembly 4 consisting of protruding walls 41, reinforcing plates 42, and a support shell 43 on the load-bearing portion 3. This assembly redistributes and buffers the loads applied by components extending from the accommodating cavity 21, as well as drop impact loads. When the load-bearing portion 3 is subjected to impact, the impact force is transmitted from the point of impact on the load-bearing portion 3 to the support shell 43 connected to it. Then, the impact force is transmitted to the reinforcing plates 42 through multiple protruding walls 41. The reinforcing plates 42 then evenly distribute the impact force received from the protruding walls 41 to the support shell 43. The support shell 43 further transmits the impact force to the grip portion 1 and the accommodating portion 2, thereby dispersing concentrated stress and significantly reducing the actual stress on the load-bearing portion 3. This changes the original structure where the load-bearing portion 3 independently bears bending and impact loads. This design enhances the impact resistance of the load-bearing section 3, a structurally weak point, effectively preventing shell breakage due to falls, ensuring reliable support for the gearbox and stability of the switch engagement, and improving the safety and service life of the entire machine in the event of an accidental fall.

[0036] In one implementation, such as Figure 2 As shown, in order to enable the reinforcing component 4 to more stably support the parts and more effectively distribute the impact force to the receiving part 2 and the holding part 1, the support shell 43 serves as the external frame of the reinforcing component 4, which is used to house the reinforcing plate 42 and can directly abut against the receiving part 2 or the holding part 1 or the parts to be supported.

[0037] Specifically, such as Figure 3 As shown, the support shell 43 includes a horizontal extension 431 and a protruding section 432 extending upward from the horizontal extension 431. The horizontal extension 431 is mainly arranged on the bearing portion 3, and its upper surface is approximately flush with the upper surface of the bearing portion 3. The protruding section 432 protrudes upward and abuts against the component extending out of the receiving portion 2. The horizontal extension 431 and the protruding section 432 are integrally formed and form surface contact abutments with the corresponding outer wall of the receiving portion 2 or the component (e.g., the gearbox 5), thereby supporting the component through multi-point and multi-faceted cooperation, enriching the load transmission path and avoiding stress concentration only on the bearing portion 3.

[0038] The assembly space 433 of the support shell 43 is a through-space structure that runs through the horizontal extension section 431 and the protruding section 432, extending from the interior of the protruding section 432 to the interior of the horizontal extension section 431. The reinforcing plate 42 is disposed within the assembly space 433 and extends along the direction of the assembly space 433. This arrangement ensures that the reinforcing plate 42 is enclosed and protected by the support shell 43, its position is precisely defined, and it can better receive and transmit impact forces from different directions.

[0039] In one embodiment, a connecting post 444 is provided on the support shell 43, and the connecting post 444 may be provided with screw holes. The connecting post 444 can be inserted into a corresponding mating hole or other similar structure on the grip part 1, and then the support shell 43 is connected to the grip part 1 by screws to realize the installation of the reinforcement component 4.

[0040] In another embodiment, the support shell 43 may be an integral structure or integrally formed with the gripping part 1. That is, the support shell 43 is part of the gripping part 1 or the accommodating part 2, and the protruding wall 41 and the reinforcing plate 42 are provided at corresponding positions inside the support shell 43.

[0041] Regarding the specific implementation of the protruding wall 41, in one embodiment, as follows: Figure 4 and Figure 5 As shown, the protruding wall 41 includes a first protruding wall 411 and a second protruding wall 412. The first protruding wall 411 is located inside the protruding section 432, extending upward from the bottom wall of the protruding section 432. The second protruding wall 412 is located inside the horizontal extension section 431, extending upward from the bottom wall of the horizontal extension section 431. After the reinforcing plate 42 is installed in the assembly space 433, it tightly abuts against the top and side of the first protruding wall 411 and the second protruding wall 412, respectively. When the reinforcing plate 42 is subjected to impact loads from components or external sources, the force can be transmitted to the protruding section 432 and the horizontal extension section 431 of the support shell 43 through the first protruding wall 411 and the second protruding wall 412, respectively. The support shell 43 then transmits the dispersed force to multiple contact points with the receiving part 2 and the bearing part 3, thereby greatly optimizing the force transmission path and dispersion effect.

[0042] To ensure that the reinforcing plate 42 perfectly fits the internal contour of the supporting shell 43 and achieves optimal force transmission, the reinforcing plate 42 is designed with a specific stepped structure. Specifically, as... Figure 4 and Figure 5 As shown, the reinforcing plate 42 includes a first horizontal segment 421, a first vertical segment 422, a second horizontal segment 423, and a second vertical segment 424 connected in sequence. The first vertical segment 422 extends downward from one end of the first horizontal segment 421, the second horizontal segment 423 extends horizontally from the bottom end of the first vertical segment 422 in the opposite direction to the extension direction of the first horizontal segment 421, and the second vertical segment 424 extends downward from the end of the second horizontal segment 423 away from the first vertical segment 422. This structure gives the reinforcing plate 42 an overall stepped shape that descends sequentially.

[0043] In the assembled state, this stepped structure precisely matches the space within the protruding section 432 and the horizontal extension section 431 of the support shell 43. The first horizontal section 421 and the first vertical section 422 are disposed within the protruding section 432 of the support shell 43 and abut against the first protruding wall 411. More specifically, a first gap 44 is left between the top of the first protruding wall 411 and the top wall of the protruding section 432; the upper surface of the first horizontal section 421 abuts against the top wall of the protruding section 432, and its lower surface abuts against the top of the first protruding wall 411. Simultaneously, a second gap 45 is left between the side wall of the first protruding wall 411 and the side wall of the protruding section 432; and both sides of the first vertical section 422 abut tightly against the side walls of the first protruding wall 411 and the side walls of the protruding section 432, respectively. This arrangement ensures that the load on the protruding section 432 can be efficiently distributed to the first protruding wall 411 through the first horizontal section 421 and the first vertical section 422 of the reinforcing plate 42.

[0044] Correspondingly, the second horizontal segment 423 and the second vertical segment 424 of the reinforcing plate 42 are disposed within the horizontal extension segment 431 of the support shell 43 and abut against the second protruding wall 412. Specifically, a third gap 46 is left between the top of the second protruding wall 412 and the top wall of the horizontal extension segment 431; the upper and lower surfaces of the second horizontal segment 423 abut against the top wall of the horizontal extension segment 431 and the top of the second protruding wall 412, respectively. Simultaneously, a fourth gap 47 is left between the side wall of the second protruding wall 412 and the side wall of the horizontal extension segment 431; and both sides of the second vertical segment 424 abut against the side walls of the second protruding wall 412 and the side walls of the horizontal extension segment 431, respectively. This structure effectively disperses the load within the horizontal extension segment 431.

[0045] Furthermore, to achieve omnidirectional positioning and support for the reinforcing plate 42, the end of the first horizontal section 421 abuts against the side wall of the protruding section 432, while the end of the second vertical section 424 abuts against the bottom wall of the horizontal extension section 431. In this way, the entire stepped reinforcing plate 42 is constrained in all directions within the assembly space 433, forming a stable support system. When the support shell 43 receives an impact, the impact force can be stably and reliably distributed to the support shell 43, the receiving part 2, and the bearing part 3 through the abutment position between the reinforcing plate 42 and the support shell, avoiding excessive impact force at a single location.

[0046] Through the above-described configuration, the reinforcing component 4 of the power tool housing of the present invention integrates a support shell 43, a specific-shaped reinforcing plate 42, and a protruding wall 41. The multi-segment structure of the support shell 43 and its contact with the housing 2 and components greatly increase the load-bearing area and force transmission path. The stepped reinforcing plate 42, the first protruding wall 411, the second protruding wall 412, and the multi-faceted clearance fit and contact with the inner wall of the support shell 43 form a complex force-bearing structure. When the power tool is dropped and impacted, the impact force is transmitted, redirected, and dispersed through the layers of this force-bearing structure. The originally concentrated impact force is efficiently decomposed into smaller impact forces in multiple directions, and is ultimately borne by the more robust housing 2 and gripping part 1. This not only completely solves the problem of easy breakage of the load-bearing part 3, but also enhances the positional stability of core components such as the gearbox under dynamic impact due to the overall enveloping support of the reinforcing component 4, significantly improving the reliability and service life of the power tool under extreme working conditions.

[0047] Another embodiment of the present invention provides a power tool, which includes a break-resistant power tool housing as described in any of the above embodiments, a motor, a gearbox, and a control component disposed within the power tool housing.

[0048] This power tool has better stability, and the housing is less prone to breakage, significantly improving the reliability and service life of the power tool under extreme working conditions.

[0049] It will be apparent to those skilled in the art that this disclosure is not limited to the details of the exemplary embodiments described above, and that this disclosure can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of this disclosure is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this disclosure. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0050] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A break-resistant power tool housing characterized by, The utility model relates to a reinforcing assembly for electric tool, comprising: a holding part; a containing part arranged at the top end of the holding part, the containing part having a hollow containing cavity, and a part of the electric tool is arranged in the containing cavity; a bearing part fixedly connected with the holding part and extending along the axial direction of the containing part, used for bearing the part extending out of the containing cavity, and the bearing part and the lower wall of the containing part form a mounting space; and a reinforcing assembly arranged in the mounting space and fixed to the bearing part or integrally formed with the bearing part. The reinforcing assembly comprises a support shell having an assembly space, a plurality of protruding walls extending from the inner wall of the support shell, and a reinforcing plate arranged in the assembly space and abutting against the plurality of protruding walls, used for dispersing the impact force received by the electric tool shell. The support shell comprises a horizontal extension segment and a protruding segment extending upward from the horizontal extension segment, the horizontal extension segment and the protruding segment abut against the containing part or the part to bear the part, the assembly space penetrates through the horizontal extension segment and the protruding segment, and the reinforcing plate is arranged in the assembly space and extends along the assembly space.

2. The break-resistant power tool housing of claim 1, wherein, The plurality of protruding walls comprise:

3. The break-resistant power tool housing of claim 2, wherein, a first protruding wall extending upward from the bottom wall of the protruding segment; and a second protruding wall formed by extending upward from the bottom wall of the horizontal extension segment, wherein the reinforcing plate abuts against the first protruding wall and the second protruding wall to disperse the impact force. The reinforcing plate comprises:

4. The break-resistant power tool housing of claim 3, wherein, a first horizontal segment; a first vertical segment extending downward from one end of the first horizontal segment; a second horizontal segment extending horizontally from the bottom end of the first vertical segment in a direction opposite to the extension direction of the first horizontal segment; and a second vertical segment extending downward from one end of the second horizontal segment away from the first vertical segment; the first horizontal segment, the first vertical segment, the second horizontal segment, and the second vertical segment are sequentially connected to form a stepped structure. The first horizontal segment and the first vertical segment are arranged in the protruding segment and abut against the first protruding wall.

5. The break-resistant power tool housing of claim 4, wherein, The top end of the first protruding wall and the top wall of the protruding segment have a first gap, the upper surface of the first horizontal segment abuts against the top wall of the protruding segment, and the lower surface abuts against the top end of the protruding wall; 6. The break-resistant power tool housing of claim 5, wherein, the side wall of the first protruding wall and the side wall of the protruding segment have a second gap, and the two sides of the first vertical segment respectively abut against the side wall of the first protruding wall and the side wall of the protruding segment. The second horizontal segment and the second vertical segment are arranged in the horizontal extension segment and abut against the second protruding wall.

7. The break-resistant power tool housing of claim 4, wherein, The top end of the second protruding wall and the top wall of the horizontal extension segment have a third gap, the upper surface and the lower surface of the second horizontal segment respectively abut against the top wall of the horizontal extension segment and the top end of the second protruding wall; 8. The break-resistant power tool housing of claim 7, wherein, the side wall of the second protruding wall and the side wall of the horizontal extension segment have a fourth gap, and the two sides of the second vertical segment respectively abut against the side wall of the second protruding wall and the side wall of the horizontal extension segment. The end of the first horizontal segment abuts against the side wall of the protruding segment, and the end of the second vertical segment abuts against the bottom wall of the horizontal extension segment.

9. The break-resistant power tool housing of claim 4, wherein, ​ 10. A break-proof power tool, characterized by The anti-breaking electric tool housing according to any one of claims 1-9, a motor, a gear box and a control assembly arranged in the electric tool housing.

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