Gaskets, piston assemblies and power tools

Abstract

The present application provides a gasket device, a piston assembly and an electric tool. The gasket device includes: a first side plate with a first through hole; a second side plate with a second through hole co-centered with the first through hole; a base extending between one end of the first side plate and one end of the second side plate; and a positioning mechanism configured to position the gasket device relative to the piston body; the gasket device is configured to be suitable for installation between the two piston arms of the piston body, so that the first side plate and the second side plate face the two piston arms respectively, and the first through hole and the second through hole are aligned with the mounting holes on the two piston arms respectively. The gasket device, the piston assembly and the electric tool of the present application have the advantages of simple structure, easy manufacturing, and convenient use, and can realize automatic alignment of the gasket device, improve installation efficiency, and reduce installation errors.

Description

Technical Field

[0001] The present application relates to the field of power tool construction. More specifically, the present application relates to a shim device, which is intended to provide improved installation performance and self-alignment performance. The present application also relates to a piston assembly including the above-mentioned shim device, and a power tool including the above-mentioned shim device or the above-mentioned piston assembly. Background Art

[0002] In mechanical transmission, it is often necessary to convert rotary motion into reciprocating motion. For example, in power tools, it is often necessary to convert the rotary motion from the motor into the reciprocating motion of the piston in order to provide functions such as hammering. The output shaft of the motor and the axis of the piston are usually not in the same straight line. In a common structure, a wobble bearing sleeved on the output shaft of the motor is used for transmission. The end of the piston can be constructed to have two piston arms. Through holes are respectively provided on the piston arms for supporting the piston pin. The wobble of the wobble bearing is sleeved on the piston pin. In use, it is desired that the wobble does not contact the piston arm and produce wear due to relative motion, so a washer is usually provided between the wobble and the piston arm. The washer is usually sleeved on the piston pin, and during installation, the washer needs to be manually aligned with the piston pin and the through hole to be assembled in place.

[0003] Therefore, the assembly of the above device requires additional manual alignment operations, thereby reducing the efficiency of assembly. In addition, since the spacer is small in size and easy to be forgotten, there is a possibility of forgetting to install the spacer, thereby bringing potential risks to the power tool.

[0004] Therefore, there is a continuous demand for a new gasket device, a piston assembly and a power tool, and it is expected that the solution can at least partially alleviate or solve the above-mentioned technical problems or technical risks. Summary of the invention

[0005] One aspect of the present application is to provide a shim device that is intended to provide good installability and self-alignment performance. Another aspect of the present application is to provide a piston assembly including the above-mentioned shim device. Another aspect of the present invention is to provide a power tool including the above-mentioned shim device or the above-mentioned piston assembly.

[0006] The purpose of this application is achieved through the following technical solutions:

[0007] A gasket device, comprising:

[0008] A first side plate having a first through hole;

[0009] a second side plate having a second through hole co-centric with the first through hole;

[0010] a base extending between an end of the first side panel and an end of the second side panel; and

[0011] a positioning mechanism configured to position the shim device relative to the piston body;

[0012] The size of the gasket device is configured to be suitable for installation between the two piston arms of the piston body, so that the first side plate and the second side plate face the two piston arms respectively, and the first through hole and the second through hole are aligned with the mounting holes on the two piston arms respectively.

[0013] In the above-mentioned gasket device, optionally, the positioning mechanism includes at least one protrusion, wherein the at least one protrusion is configured to protrude from the edge of the first side plate and extend in a direction away from the second side plate, and / or the at least one protrusion is configured to protrude from the edge of the second side plate and extend in a direction away from the first side plate.

[0014] In the above-mentioned gasket device, optionally, a recess matched with the size of the protrusion is also provided on the piston arm to receive and fix the gasket device in place.

[0015] In the above gasket device, optionally, it also includes a third through hole arranged in the base.

[0016] In the above gasket device, optionally, the distance between the center line of each protrusion and the base is greater than the distance between the axis of the first through hole and the second through hole and the base.

[0017] In the above shim device, optionally, the positioning mechanism includes a third through hole provided in the base, the third through hole being sized and configured to receive and engage a corresponding protrusion on the piston body so as to fix the shim device in place.

[0018] In the above shim device, optionally, the locating mechanism comprises a side of the base, wherein the base is dimensioned to be secured in place by a corresponding securing formation on the piston body, and wherein the securing formation comprises a recess or a plurality of clamping portions.

[0019] A piston assembly, comprising:

[0020] Piston body;

[0021] Two piston arms extending from one end of the piston body, wherein each piston arm is provided with a mounting hole;

[0022] a piston pin sized and configured to fit into the mounting hole;

[0023] The above-mentioned gasket device, wherein the gasket device is installed between the piston arms so that the piston pin enters the mounting hole after extending through the first through hole and the second through hole.

[0024] In the above piston assembly, optionally, the size of the shim device is configured so that a projection of the shim device in the axial direction of the piston body is located within a projection of the piston body in the axial direction of the piston body.

[0025] An electric tool comprises the above-mentioned gasket device or the above-mentioned piston assembly.

[0026] The gasket device, piston assembly and electric tool of the present application have the advantages of simple structure, easy manufacturing, and convenient use. They can achieve automatic alignment of the gasket device, improve installation efficiency, and reduce installation errors. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The present application will be further described in detail below in conjunction with the accompanying drawings and preferred embodiments, but those skilled in the art will appreciate that these drawings are drawn only for the purpose of explaining the preferred embodiments and therefore should not be used as a limitation on the scope of the present application. In addition, unless otherwise specified, the drawings are intended only to conceptually represent the composition or structure of the described object and may contain exaggerated displays, and the drawings are not necessarily drawn to scale.

[0028] Figure 1 is a three-dimensional view of an embodiment of the gasket device of the present application.

[0029] Figure 2 It is a partial stereoscopic view of the piston assembly of the present application when assembled in place.

[0030] Figure 3 yes Figure 2 A partial cross-sectional side view of the illustrated embodiment when assembled in place.

[0031] Figure 4 yes Figure 2 A partial front view of the illustrated embodiment when assembled in position.

[0032] Figure 5 It is a stereoscopic view of another embodiment of the gasket device of the present application. DETAILED DESCRIPTION

[0033] The preferred embodiments of the present application will be described in detail below with reference to the accompanying drawings. It will be appreciated by those skilled in the art that these descriptions are only illustrative and exemplary and should not be construed as limiting the scope of protection of the present application.

[0034] First, it should be noted that the directional terms such as top, bottom, upward, downward, etc. mentioned in this article are defined relative to the directions in the respective drawings. They are relative concepts and can therefore vary according to different positions and different practical states. Therefore, these or other directional terms should not be understood as restrictive terms.

[0035] In addition, it should be pointed out that any single technical feature described or implied in the embodiments of this document, or any single technical feature shown or implied in the accompanying drawings, can still be combined between these technical features (or their equivalents) to obtain other embodiments of the present application that are not directly mentioned in this document.

[0036] It should be noted that in different drawings, the same reference numerals denote the same or substantially the same components.

[0037] Figure 1 1 is a three-dimensional view of an embodiment of the gasket device of the present application. Among them, the gasket device 100 includes a first side plate 110 and a second side plate 120 arranged facing each other. The first side plate 110 and the second side plate 120 are roughly configured as a rectangle and are connected together by a base 130 at one side. The base 130 can be configured as a roughly rectangular shape and is roughly configured perpendicularly to the first side plate 110 and the second side plate 120, so that the first side plate 110 and the second side plate 120 are configured to be roughly parallel to each other. The gasket device 100 also includes one or more positioning mechanisms, which are configured to position the gasket device 100 relative to the piston body 200 not shown. The specific positioning method will be described in detail below. In the illustrated embodiment, the positioning mechanism includes tabs 110a, 110b and 120a, etc., which are arranged on the edges of the first side plate 110 and the second side plate 120. As shown in the figure, the tabs 110a and 110b are configured to protrude from the edge of the first side plate 110 and extend in a direction away from the second side plate 120, and the tab 120a is configured to protrude from the edge of the second side plate 120 and extend in a direction away from the first side plate 110. Although not shown, it is easy to understand that Figure 1 A protrusion 120b symmetrical to the protrusion 120a is also provided on the other side of the second side plate 120 which is blocked in the middle (see Figure 5 ).

[0038] The first side plate 110 and the second side plate 120 are respectively provided with a first through hole 111 and a second through hole 121. The first through hole 111 and the second through hole 121 have substantially the same size and extend substantially along the same axis, so that the first through hole 111 and the second through hole 121 are configured to be substantially concentric.

[0039] In one embodiment of the present application, the base 130 may be provided with a third through hole 131. The third through hole 131 may be intended as a measure to reduce the overall weight of the gasket device 100, and may also be used as a positioning mechanism as described in detail below. In one embodiment of the present application, the base 130 may not be provided with a through hole, and thus the processing steps and manufacturing costs can be reduced. In addition, the base 130 may also have a side 132.

[0040] Each tab may be configured to be integral with the first side plate 110 and the second side plate 120 and to extend substantially in a direction perpendicular to the first side plate 110 and the second side plate 120. In fact, the structure of the tab may not be limited to Figure 1 For example, Figure 5 1 is a three-dimensional view of another embodiment of the gasket device of the present application, wherein only a single tab is provided on the first side plate 110 and the second side plate 120, and the tabs are respectively provided on both sides of the symmetry axis of the first through hole 111 and the second through hole 121. In fact, the tab can also be provided on the same side of the symmetry axis of the first through hole 111 and the second through hole 121. In an alternative embodiment, three tabs can also be provided on the gasket device 100. In another alternative embodiment, more than one tab can be provided on the first side plate 110 and / or the second side plate 120. In another embodiment, only a single tab can be provided on the entire gasket device 100, for example, only including Figure 1 . During installation, the entire gasket device 100 can be fixed using the single tab 110a. In the case of a single tab, a recess corresponding to the tab may be provided on other components in the piston assembly (e.g., the piston body or the piston arm). When the recess matches the tab, the gasket device 100 can be positioned in a desired assembly position, thereby facilitating the assembly of the gasket device 100. In addition, although in the illustrated embodiment, the respective tabs are provided at the edges of the first side plate 110 and the second side plate 120 adjacent to the base 130, in another embodiment, the tabs may be provided at the edges of the first side plate 110 and the second side plate 120 opposite to the base 130.

[0041] Figure 2 : is a partial stereoscopic view of the piston assembly of the present application when assembled in place. As an example, Figure 2 The following instructions use Figure 1 It is easy to understand that the piston assembly according to the present application can also be implemented by using the gasket device 100 of other structures or configurations described herein.

[0042] The piston assembly 10 includes: a piston body 200 having two piston arms 210, 220 extending from one end of the piston body 200, wherein each piston arm 210, 220 is respectively provided with a mounting hole; a piston pin 230, whose size is configured to be suitable for being installed in the mounting hole; and a gasket device 100, wherein the gasket device 100 is installed between the piston arms 210, 220 so that the piston pin 230 can enter the mounting hole after extending through the first through hole 111 and the second through hole 121.

[0043] On the one hand, the spacer device 100 is dimensioned to be installed between the two piston arms 210, 220 of the piston body 200. Therefore, when assembled in place, the first side plate 111 and the second side plate 120 face the two piston arms 210, 220, respectively, and the first through hole 111 and the second through hole 121 are aligned with the mounting holes on the two piston arms 210, 220, respectively. This allows the piston pin 230 to rotate freely after being installed into the first through hole 111, the second through hole 121 and the mounting hole. On the other hand, a rocker bearing 310 may be provided on the drive shaft 300, and the rocker bearing 310 has a rocker 311, and the rocker 311 is adapted to the hole on the piston pin 230. At this time, the first side plate 110 and the second side plate 120 of the gasket device 100 will be located between the piston arm 210 and the rocker arm 311 and between the piston arm 220 and the rocker arm 311, respectively, so as to avoid direct contact between the rocker arm 311 and the piston arms 210, 220, thereby preventing wear of the rocker arm 311 and the piston arms 210, 220.

[0044] In use, the rocker bearing 310 and the piston pin 230 convert the rotational motion of the drive shaft 300 into the reciprocating motion of the piston 200, thereby achieving a specific function of the power tool.

[0045] In one embodiment, a recessed portion matching the size of each tab is further provided on the piston arm to receive and fix the shim device 100 in place. When the shim device 100 is installed in place, the tab can be matched exactly into the recessed portion, thereby limiting the movement of the shim device 100.

[0046] Figure 3 yes Figure 2 A partial cross-sectional side view of the illustrated embodiment when assembled in place. The first through hole 111 and the second through hole 121 on the piston arms 210, 220 define an axial plane A. The axial plane A is located on a substantially vertical plane, and the axes of the first through hole 111 and the second through hole 121 are located on the axial plane A. Similarly, the tabs of the gasket device 100 can also be constructed around the center line B. As shown in the figure, the distance between the center line B of each tab and the base 130 is greater than the distance between the axial plane A of the first through hole 111 and the second through hole 121 and the base 130. In use, the piston body 200 will need to be installed in a sleeve not shown. By setting the relationship between the above center line and the axial plane, the tabs can be kept as far away from the sleeve as possible, avoiding undesired contact between the gasket device 100 and the sleeve during the movement of the piston. In addition, the above construction is also conducive to faster installation of the various components, thereby improving work efficiency.

[0047] Figure 4 yes Figure 2A partial front view of the illustrated embodiment when assembled in place. As shown in the figure, the size of the shim device 100 is configured so that the projection of the shim device 100 in the axial direction of the piston body 200 is located within the projection of the piston body 200 in the axial direction of the piston body 200. The purpose of the above configuration is also to avoid undesired contact between the shim device 100 and the sleeve during the movement of the piston.

[0048] During assembly, the operator can insert the shim device 100 described above through the space between the piston arms 210 and 220 so that the tabs are close to the surface of the piston arms 210 and 220. The base 130 can be configured to fit the end of the piston body 200, or it can be kept at a certain distance from the end of the piston body 200. In addition, it is also possible to arrange the base 130 close to the end of the piston arms 210 and 220. The tabs will help fix the shim device 100 in place and ensure that the first through hole 111 and the second through hole 121 are aligned with the mounting holes on the two piston arms 210 and 220, respectively. The configuration of the shim device 100 according to the present application is not only convenient for installation, but also because the three-dimensional structure of the shim device 100 is more eye-catching, it is not easy to be forgotten by the operator during assembly.

[0049] The present application also provides another embodiment of the shim device, wherein the first side plate 111 and the second side plate 120 do not have tabs and are configured to have substantially smooth edges. In this case, the positioning mechanism is constituted by a third through hole 131 disposed in the base 130. Accordingly, a protrusion matching the third through hole 131 will be disposed on the end of the piston body 200 between the piston arms 210 and 220. The third through hole 131 is sized to accommodate and engage a corresponding protrusion on the piston body 200 so as to fix the shim device 100 in place. In this case, the base 130 must be disposed adjacent to the end of the piston body 200.

[0050] The present application also provides another embodiment of a shim device, wherein the positioning mechanism includes a side 132 of the base 130. A fixing structure matching the side of the base 130 may be provided on the end of the piston body 200 to fix the shim device 100 in place. In one embodiment, at least two clamping portions are provided on the end of the piston body 200 between the piston arms 210 and 220. The base 130 is configured to be clamped between the clamping portions so that each clamping portion fits the side 132 of the base 130 to fix the shim device 100 in place. In another embodiment, a recess corresponding to the size of the base 130 may be provided on the end of the piston body 200 so that the side 132 of the base 130 matches in the recess to fix the shim device 100 in place.

[0051] In addition, the structure of the gasket device described in each of the above embodiments can be implemented separately, or the features of two or more embodiments can be combined to obtain a further combined embodiment.

[0052] The gasket device according to the present application can be made of any suitable material, such as metal materials such as stainless steel. The gasket device can be formed by cutting, pressing and bending a plate. In one embodiment of the present application, the gasket device can be integrated, and there is continuity and consistency in material structure between the various parts.

[0053] The present application also provides an electric tool, which includes the gasket device 100 described above, or includes the piston assembly 10 described above. The electric tool may include an electric hammer, an electric drill, or any suitable type of tool, including but not limited to a handheld tool.

[0054] This specification discloses the present application with reference to the accompanying drawings, and also enables a person skilled in the art to implement the present application, including making and using any device or system, selecting suitable materials, and using any combined gasket device. The scope of the present application is defined by the technical solution claimed for protection, and includes other examples that occur to a person skilled in the art. As long as such other examples include structural elements that are not different from the literal language of the technical solution claimed for protection, or such other examples include equivalent structural elements that are not substantially different from the literal language of the technical solution claimed for protection, such other examples shall be deemed to be within the scope of protection determined by the technical solution claimed for protection in the present application.

Claims

1. A gasket device (100), characterized in that: include: A first side plate (110) having a first through hole (111); A second side plate (120) having a second through hole (121) co-centric with the first through hole (111); a base (130) extending between one end of the first side panel (110) and one end of the second side panel (120); as well as a positioning mechanism configured to position the gasket device (100) relative to the piston body (200), the positioning mechanism comprising at least one tab, wherein the at least one tab is configured to protrude from an edge of the first side plate (110) and extend in a direction away from the second side plate (120), and / or the at least one tab is configured to protrude from an edge of the second side plate (120) and extend in a direction away from the first side plate (110); The size of the gasket device (100) is configured to be suitable for installation between the two piston arms (210, 220) of the piston body (200), so that the first side plate (110) and the second side plate (120) respectively face the two piston arms (210, 220), and the first through hole (111) and the second through hole (112) are respectively aligned with the mounting holes on the two piston arms (210, 220); and The two piston arms (210, 220) are also provided with recesses matched with the size of the tabs so as to receive and fix the gasket device (100) in place. When the recesses match the tabs, the gasket device (100) is positioned at a desired assembly position.

2. The gasket device according to claim 1, characterized in that It also includes a third through hole (131) disposed in the base (130).

3. The gasket device according to claim 1, characterized in that The distance between the center line of each protrusion and the base (130) is greater than the distance between the axis of the first through hole (111) and the second through hole (121) and the base (130).

4. The gasket device according to claim 1, characterized in that The positioning mechanism includes a third through hole (131) disposed in the base (130), the third through hole (131) being sized to receive and engage a corresponding protrusion on the piston body (200) to secure the shim device (100) in place.

5. The gasket device according to claim 1, characterized in that The locating mechanism comprises a side of the base (130), wherein the base (130) is sized to be secured in place by a corresponding securing formation on the piston body (200) and wherein the securing formation comprises a recess or a plurality of clamping portions.

6. A piston assembly (10), characterized in that: include: Piston body (200); Two piston arms (210, 220) extending from one end of the piston body (200), wherein each piston arm (210, 220) is provided with a mounting hole; a piston pin (230) sized and configured to fit into the mounting hole; The gasket device (100) according to any one of claims 1 to 5, wherein the gasket device (100) is installed between the piston arms (210, 220) so that the piston pin (230) enters the mounting hole after extending through the first through hole (111) and the second through hole (121).

7. The piston assembly according to claim 6, characterized in that The size of the shim device (100) is configured such that a projection of the shim device (100) in the axial direction of the piston body (200) is located within a projection of the piston body (200) in the axial direction of the piston body (200).

8. An electric tool, characterized in that: A gasket device (100) comprising any one of claims 1-5, or a piston assembly (10) comprising any one of claims 6-7.

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