Support structure and fastener striking tool

Abstract

The utility model relates to the technical field of electric tools, aims to solve the problem that how to enable a shell to be not prone to damage, and provides a supporting structure and a fastener striking tool. The supporting structure comprises a shell, the shell comprises two half shells, each half shell limits an open containing groove, the two containing grooves are communicated to form a center hole, and the center hole is used for being in shaft hole fit with a shaft body. A groove extending in the circumferential direction is formed in the inner circumferential face of the containing groove in a concave mode, and supporting ribs are arranged on the groove bottom face of the groove in a protruding mode and protrude out of the inner circumferential face of the containing groove in the radial direction. The supporting rib extends in the circumferential direction, and the radial size of the inner edge of the supporting rib is gradually reduced from the middle to the two ends in the circumferential direction. The shell has the beneficial effects that the deformation quantity of the parts, close to the two ends in the circumferential direction, of the supporting ribs is smaller than the deformation quantity of the parts, close to the two ends in the circumferential direction, of the supporting ribs, so that the overall deformation quantity of the supporting ribs is prevented from being too large, the grooves can accommodate axial deformation of the supporting ribs, axial deformation of the shell is reduced, and damage to the shell is avoided.

Description

Technical Field

[0001] The present application relates to the technical field of power tools, and in particular to a support structure and a fastener striking tool. Background Art

[0002] A supporting structure is provided in the related art, wherein supporting ribs are provided on the inner wall of a housing to support a shaft body fitted in the housing. However, the housing in the related art is easily damaged. Utility Model Content

[0003] The present application provides a support structure and a fastener striking tool to solve the problem of how to prevent the shell from being easily damaged.

[0004] According to one aspect of the present application, a support structure is provided, comprising a housing, the housing comprising two half-shells, each half-shell defining an open receiving slot, the two receiving slots being connected to form a central hole, the central hole being adapted to mate with a shaft body to form an axial hole. A circumferentially extending groove is concavely formed on the inner circumferential surface of the receiving slot, and a support rib is convexly formed on the bottom surface of the groove, radially protruding from the inner circumferential surface of the receiving slot. The support rib extends circumferentially, and the radial dimension of the inner edge of the support rib gradually decreases from the center toward the ends along the circumference.

[0005] In the aforementioned support structure, because the radial dimension of the inner edge of the support rib gradually decreases from the center toward the ends along the circumferential direction, when the support rib needs to form a transition fit or interference fit with the shaft, the deformation of the rib near the ends along the circumferential direction is smaller than the deformation of the rib near the ends along the circumferential direction, thereby preventing the overall deformation of the support rib from being excessive. This helps reduce deformation of the housing and prevents damage to the housing due to excessive deformation. By protruding the support rib from the bottom surface of the groove, the groove can accommodate axial deformation of the support rib, thereby helping to reduce axial deformation of the housing and further preventing damage to the housing.

[0006] In one embodiment, the inner edge extends along a circular arc, and the center of the inner edge is not concentric with the axis of the half shell.

[0007] In one embodiment, the half shell has a first symmetry plane passing through the axis of the central hole, and the grooves and the supporting ribs are symmetrically arranged about the first symmetry plane.

[0008] In one embodiment, the supporting rib is spaced apart from two axial end surfaces of the groove.

[0009] In one embodiment, the support rib has a second symmetry plane, the second symmetry plane is perpendicular to the axis of the central hole, the support rib is symmetrically arranged with respect to the second symmetry plane, and the groove is symmetrically arranged with respect to the second symmetry plane.

[0010] In one embodiment, the supporting rib has two side surfaces, which are respectively located on both sides of the inner edge along the axial direction, and are inclined relative to the inner edge.

[0011] In one embodiment, the grooves of the two half shells are connected in the circumferential direction, and the two supporting ribs abut against each other in the circumferential direction.

[0012] In one embodiment, the half shells are provided with a plurality of grooves spaced axially apart, and a support rib protrudes from the bottom surface of each groove. The grooves on one half shell correspond one-to-one with the grooves on the other half shell, and the support ribs on one half shell correspond one-to-one with the support ribs on the other half shell. The corresponding grooves are circumferentially connected, and the corresponding support ribs abut circumferentially.

[0013] According to another aspect of the present application, a fastener striking tool is provided, comprising a cylinder and a support structure as described in any one of the above embodiments. The cylinder is a shaft.

[0014] In one embodiment, the fastener striking tool further includes a connecting structure and a locking member. The connecting structure is disposed outside the housing. The locking member is mounted on the connecting structure so that the two half-shells abut circumferentially and the inner edge, circumferentially near the middle, presses against the cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0016] Figure 1 It is a three-dimensional view of a fastener striking tool in one embodiment of the present application.

[0017] Figure 2 for Figure 1 An exploded view of a portion of the fastener striking tool in the illustrated embodiment.

[0018] Figure 3 for Figure 1 A cross-sectional view of the support structure in the illustrated embodiment in the unstressed state, with the axle additionally shown.

[0019] Figure 4 for Figure 1 Schematic diagram of the structure of the half shell in the embodiment shown.

[0020] Figure 5 for Figure 1 Side view of the half-shell in the illustrated embodiment.

[0021] Description of main component symbols:

[0022] Fastener Hitting Tool 1000

[0023] Support structure 100

[0024] Housing 10

[0025] Center hole 10a

[0026] Half Shell 11

[0027] Accommodation groove 11a

[0028] Groove 11b

[0029] Support ribs 111

[0030] Inner edge 1111

[0031] Side 1112

[0032] Axis 200

[0033] Cylinder 201

[0034] Connection structure 300

[0035] Gun Nozzle 400 DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments.

[0037] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may also be an element centered therein. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may also be an element centered therein. When an element is considered to be "set on" another element, it may be directly set on the other element or there may also be an element centered therein. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0038] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "or / and" as used herein includes any and all combinations of one or more of the relevant listed items.

[0039] Some embodiments of the present application are described in detail. In the absence of conflict, the following embodiments and features of the embodiments can be combined with each other.

[0040] Example

[0041] A supporting structure is provided in the related art, in which supporting ribs are arranged circumferentially inside a shell to provide support for a shaft body fitted with the shell. However, the shell in the related art is easily damaged.

[0042] The inventors of this application have discovered through research that the reason for the above-mentioned problem is that when the support ribs are required to have a transition fit or interference fit with the shaft body, the support ribs are subjected to uneven force along the circumferential direction, which can easily lead to excessive deformation of the support ribs on one side of the axis of the shell, while the support ribs on the other side of the axis of the shell are deformed less. Therefore, after long-term use, large plastic deformation is likely to occur on one side of the shell, causing damage to the shell.

[0043] In view of this, the present embodiment provides a support structure 100 and a fastener striking tool 1000 , which can solve the above-mentioned problems and will be described below with reference to the accompanying drawings.

[0044] Figure 1 is a perspective view of a fastener striking tool 1000 according to an embodiment of the present application; Figure 2 for Figure 1 An exploded view of a portion of the fastener striking tool 1000 in the illustrated embodiment; Figure 3 for Figure 1 The support structure 100 in the illustrated embodiment is a cross-sectional view in an untightened state, with the shaft 200 additionally shown.

[0045] See also Figures 1 to 3 , an embodiment of the present application provides a fastener striking tool 1000 , including a cylinder 201 and a support structure 100 .

[0046] The support structure 100 includes a shell 10 with a center hole 10a provided therein. The cylinder 201 and the center hole 10a form an axial hole fit to provide support for the cylinder 201 through support ribs 111 protruding from the inner circumference of the center hole 10a.

[0047] The fastener striking tool 1000 also includes a nozzle 400, a motor, a lifting mechanism, a firing pin, a piston, a nail magazine, a nail pusher, and a nail driving seat. During use, when the nozzle 400 is pressed into the fastener striking tool 1000, the motor is activated, which drives the firing pin through the lifting mechanism, driving the piston to compress air. After the firing pin disengages from the lifting mechanism, the firing pin is released and strikes a fastener (such as a row of nails) in the nail magazine that has been pushed into the nail driving seat by the nail pusher, causing the fastener to be ejected from the nozzle 400.

[0048] In some embodiments, as Figure 2 and Figure 3 As shown, the housing 10 includes two half-shells 11. The fastener striking tool 1000 also includes a connecting structure 300 and a locking member (such as a screw, not shown in the figure). The connecting structure 300 is disposed outside the housing 10, and the locking member is mounted on the connecting structure 300 so that the two half-shells 11 abut circumferentially and the inner edge 1111 near the middle along the circumference is pressed against the cylinder 201 to provide support for the cylinder 201.

[0049] The housing 10 has a tightened state and an untightened state. In the tightened state (not shown in the figure), the locking member is installed on the connecting structure 300 so that the two half shells 11 abut against each other along the circumferential direction and the inner edge 1111 is pressed against the cylinder 201 along the circumferential direction near the middle. Figure 3 As shown, the locking member is not locked in the connection structure 300, the two half-shells 11 are spaced circumferentially from each other, and a gap exists between the support rib 111 and the cylinder 201. In use, when the locking member is installed on the connection structure 300, the locking member can tighten the connection structure 300, thereby switching the housing 10 from an untightened state to a tightened state.

[0050] Figure 4 for Figure 1 A schematic structural diagram of the half shell 11 in the illustrated embodiment; Figure 5 for Figure 1 Side view of the half-shell 11 in the embodiment shown.

[0051] See also Figures 3 to 5 The support structure 100 provided in this embodiment includes a housing 10. The housing 10 includes two half-shells 11. Each half-shell 11 defines an open receiving groove 11a. The two receiving grooves 11a are connected to form a center hole 10a. The center hole 10a is used to form an axial hole for a shaft body 200. The inner circumferential surface of the receiving groove 11a is concavely provided with a groove 11b extending in the circumferential direction. The bottom surface of the groove 11b is provided with a support rib 111. The support rib 111 protrudes radially from the inner circumferential surface of the receiving groove 11a. The support rib 111 extends in the circumferential direction, and the radial dimension of the inner edge 1111 of the support rib 111 gradually decreases from the middle to the ends along the circumferential direction.

[0052] In the support structure 100, the support rib 111 is used to support the shaft 200. Because the radial dimension of the inner edge 1111 of the support rib 111 gradually decreases from the center to the ends along the circumferential direction, when the support rib 111 needs to form a transition fit or interference fit with the shaft 200, the deformation of the circumferential portion of the support rib 111 near the ends is smaller than the deformation of the circumferential portion of the support rib 111 near the ends, thereby preventing the overall deformation of the support rib 111 from being excessive. This helps reduce deformation of the housing 10 and prevents damage to the housing 10 due to excessive deformation. Furthermore, by pressing the inner edge 1111 of the circumferential portion of the support rib 111 near the center against the shaft 200, reliable support is provided for the shaft 200. By protruding the support rib 111 from the bottom surface of the groove 11b, the groove 11b can accommodate the axial deformation of the support rib 111, thereby helping to reduce axial deformation of the housing 10 and further prevent damage to the housing 10. By setting the groove 11b, the radial distance between the inner edge 1111 and the bottom surface of the groove 11b is greater than the radial distance between the inner edge 1111 and the inner circumferential surface of the accommodating groove 11a, thereby increasing the radial dimension of the inner edge 1111, and allowing the inner edge 1111 to undergo greater radial deformation, reducing the difficulty of matching the support rib 111 with the shaft body 200.

[0053] During use, when a transition fit or interference fit is required between the housing 10 and the shaft 200, as the locking member tightens the connection structure 300 toward the housing 10, the circumferentially central portion of the support rib 111 first abuts against the housing 10, i.e., the circumferentially central portion of the support rib 111 first deforms under force and then circumferentially spreads to both ends. After the locking member tightens the connection structure 300, the circumferentially central portion of the support rib 111 presses against the shaft 200 to ensure a high degree of fit and support between the housing 10 and the shaft 200. A gap may exist between the circumferentially central portions of the support rib 111 and the shaft 200 to prevent the overall deformation of the support rib 111 from being too large, which could result in excessive deformation of the housing 10. It should be understood that both the bottom surface of the groove 11b and the inner circumferential surface of the receiving groove 11a have a gap with the shaft 200.

[0054] In some embodiments, the inner edge 1111 extends along an arc, and the center of the inner edge 1111 is not concentric with the axis of the half shell 11. Thus, by extending the inner edge 1111 along an arc, the shape of the support rib 111 is more closely aligned with the shape of the shaft 200, thereby further improving the precision of the fit between the housing 10 and the shaft 200. The center of the inner edge 1111 is not concentric with the axis of the half shell 11, causing the radial dimension of the inner edge 1111 of the support rib 111 to gradually decrease from the center toward the ends along the circumferential direction.

[0055] In some embodiments, as Figure 3As shown, the half shell 11 has a first symmetry plane (not shown in the figure) passing through the axis of the central hole 10a, and the groove 11b and the support rib 111 are symmetrically arranged about the first symmetry plane to improve the deformation uniformity of the support rib 111 along the circumferential direction.

[0056] In some embodiments, as Figure 4 As shown, the support rib 111 is spaced apart from the two axial end faces of the groove 11b so that deformation of the support rib 111 on both sides along the axial direction can be accommodated by the groove 11b, which is further beneficial to reducing the deformation of the housing 10.

[0057] In some embodiments, as Figure 5 As shown, the support rib 111 has two side surfaces 1112 , which are respectively located on both sides of the inner edge 1111 along the axial direction. The side surfaces 1112 are inclined relative to the inner edge 1111 to make the support rib 111 easier to deform.

[0058] In some embodiments, the grooves 11 b of the two half shells 11 are circumferentially connected, and the two support ribs 111 are circumferentially abutted, so that the support ribs 111 of the two shells 10 surround the outer periphery of the shaft body 200 to more reliably support the shaft body 200.

[0059] In some embodiments, as Figures 3 to 5 As shown, a plurality of grooves 11b are provided on the half shell 11, and the plurality of grooves 11b are spaced apart from each other along the axial direction. A support rib 111 is provided on the bottom surface of each groove 11b. The plurality of grooves 11b on one half shell 11 are provided in a one-to-one correspondence with the plurality of grooves 11b on the other half shell 11, and the plurality of support ribs 111 on one half shell 11 are provided in a one-to-one correspondence with the support ribs 111 on the other half shell 11. The two corresponding grooves 11b are connected in the circumferential direction, and the two corresponding support ribs 111 are abutted in the circumferential direction. In this way, different parts of the shaft body 200 along the axial direction are supported by the plurality of support ribs 111, further improving the support effect of the housing 10 on the shaft body 200.

[0060] Alternatively, as Figure 4 and Figure 5 As shown, each half shell 11 is provided with two grooves 11 b , and the two grooves 11 b are respectively provided close to the axial ends of the same half shell 11 .

[0061] The support structure 100 provided in the embodiment of the present application has a simple and reliable structure, and is uniformly stressed overall. It can ensure a high degree of fit between the housing 10 and the shaft 200, reduce the difficulty of fit and the overall deformation of the housing 10, and thus improve the support effect on the shaft 200. The support structure 100 is particularly suitable for use in applications with high fit requirements, but can also be used in applications with lower fit requirements.

[0062] The above embodiments are only used to illustrate the technical solutions of the present application and are not intended to limit the present application. Although the present application has been described in detail with reference to the above preferred embodiments, those skilled in the art should understand that modifications or equivalent replacements of the technical solutions of the present application should not depart from the spirit and scope of the technical solutions of the present application.

Claims

1. A support structure, characterized in that: include: The housing comprises two half shells, each of the half shells defines an open receiving groove, the two receiving grooves are connected to form a central hole, and the central hole is used to form an axial hole for cooperating with a shaft body; The inner circumferential surface of the receiving groove is concavely provided with a groove extending in the circumferential direction, and the bottom surface of the groove is convexly provided with a supporting rib, and the supporting rib protrudes radially from the inner circumferential surface of the receiving groove; The support ribs extend along the circumferential direction, and the radial dimensions of the inner edges of the support ribs gradually decrease from the middle to both ends along the circumferential direction.

2. The support structure according to claim 1, characterized in that The inner edge extends along a circular arc; The center of the inner edge is not concentric with the axis of the half shell.

3. The support structure according to claim 1, characterized in that The half shell has a first plane of symmetry passing through the axis of the central hole; The grooves and the supporting ribs are both symmetrically arranged about the first symmetry plane.

4. The support structure according to claim 1, characterized in that The supporting ribs are spaced apart from two axial end surfaces of the groove.

5. The support structure according to claim 4, characterized in that The support ribs have a second symmetry plane, the second symmetry plane is perpendicular to the axis of the central hole, and the support ribs are symmetrically arranged about the second symmetry plane; The grooves are symmetrically arranged about the second symmetry plane.

6. The support structure according to claim 1, characterized in that The supporting rib has two side surfaces; The two side surfaces are respectively located on both sides of the inner edge along the axial direction, and the side surfaces are inclined relative to the inner edge.

7. The support structure according to claim 1, characterized in that The grooves of the two half shells are connected along the circumferential direction, and the two supporting ribs are in contact with each other along the circumferential direction.

8. The support structure according to claim 1, characterized in that The half shell is provided with a plurality of grooves, which are spaced apart from each other along the axial direction, and the bottom surface of each groove is provided with a protruding support rib; The plurality of grooves on one of the half shells are arranged in a one-to-one correspondence with the plurality of grooves on the other half shell, and the plurality of support ribs on one of the half shells are arranged in a one-to-one correspondence with the support ribs on the other half shell; The two corresponding grooves are connected along the circumferential direction, and the two corresponding support ribs are abutted along the circumferential direction.

9. A fastener striking tool, characterized in that: comprising a cylinder and a support structure according to any one of claims 1 to 8; The cylinder is the shaft body.

10. The fastener striking tool according to claim 9, wherein: The fastener striking tool further includes a connecting structure and a locking member; The connecting structure is arranged outside the housing; The locking member is installed on the connecting structure so that the two half shells abut against each other along the circumferential direction, and the portion of the inner edge close to the middle along the circumferential direction is pressed against the cylinder.

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