Electric tool

Abstract

The embodiment of the utility model relates to an electric tool. Comprising an annular gear box, a main shell, a speed change gear ring and a swing frame, and the annular gear box is provided with two groove holes which are oppositely formed; the main shell sleeves the outer side of the annular gearbox, a first space is defined by the outer side of the annular gearbox and the inner side of the main shell, and the slotted hole communicates with the first space; wherein a first convex rib and a second convex rib are arranged on the inner wall of the main shell, a first containing groove is defined by the first convex rib and the second convex rib, the first containing groove is used for storing grease seeping from the slotted hole, the first convex rib is opposite to the slotted hole in position, and a gap exists between the first convex rib and the swing frame. According to the electric tool provided by the embodiment of the invention, the first containing groove stores grease seeping from the groove hole, the first convex ribs can support the swing frame when the swing frame deforms, and the gear skipping situation of the electric tool in the using process is greatly reduced.

Description

Technical Field

[0001] This application relates to the technical field of power tools, and particularly to a power tool. Background Art

[0002] Power tools have a high and low speed switching function. In the high and low speed switching device of a power tool, a swing frame passes through a slot in an annular gearbox and is connected to a speed change gear ring. During use, the operation of the gears in the annular gearbox causes gear grease to seep out through the slot in the annular gearbox. The lack of grease lubrication for the gears will reduce their service life and affect the appearance of the machine housing.

[0003] Currently, there is a sponge member connected between the slot and the main housing. The sponge member has elasticity to block the seepage of grease and prevent gear shifting problems. However, the sponge member may be damaged after long-term extrusion and may even contaminate the grease. Utility Model Content

[0004] In view of this, embodiments of this application provide a power tool to solve at least one problem in the background art.

[0005] In a first aspect, embodiments of this application provide a power tool, which includes:

[0006] An annular gearbox having two oppositely arranged slots;

[0007] A main housing sleeved outside the annular gearbox. The outside of the annular gearbox and the inside of the main housing enclose a first space, and the slots communicate with the first space;

[0008] A speed change gear ring located inside the annular gearbox;

[0009] A swing frame surrounding the outside of the annular gearbox and located in the first space. The swing frame passes through the slots and is connected to the speed change gear ring. The swing frame moves along the axial direction of the speed change gear ring in the slots;

[0010] Wherein, a first rib and a second rib are provided on the inner wall of the main housing. The first rib and the second rib enclose a first receiving groove for storing the grease seeping out from the slots. The first rib is opposite to the slot and has a gap with the swing frame.

[0011] Combined with the first aspect of this application, in an optional embodiment, the second rib includes a first horizontal rib, a first vertical rib, and a second vertical rib. The first horizontal rib is opposite to the first rib, the first vertical rib is opposite to the second vertical rib, and the surfaces of the first vertical rib and the second vertical rib contact the outer wall surface of the annular gearbox.

[0012] In connection with the first aspect of the present application, in an alternative embodiment, the ring gearbox is provided with a first mounting rib and a second mounting rib along its circumferential direction. The surface of the first mounting rib contacts the surface of the first vertical rib, and the surface of the second mounting rib contacts the surface of the second vertical rib.

[0013] In connection with the first aspect of the present application, in an alternative embodiment, a third rib is further provided on the inner wall of the main housing. The third rib and the first horizontal rib are respectively located on both sides of the first rib. The third rib, the first rib, the first vertical rib and the second vertical rib enclose a second receiving groove for receiving the grease.

[0014] In connection with the first aspect of the present application, in an alternative embodiment, the edge of the third rib contacts or abuts against the outer wall of the ring gearbox.

[0015] In connection with the first aspect of the present application, in an alternative embodiment, the power tool further includes:

[0016] A handle housing, which is connected to the main housing, and the distances between the third rib, the first rib and the first horizontal rib and the handle housing increase in sequence.

[0017] In connection with the first aspect of the present application, in an alternative embodiment, a reinforcing rib is further provided on the inner wall of the main housing. The reinforcing rib is connected to the ends of the first horizontal rib, the first rib and the third rib, and the reinforcing rib is connected between the first horizontal rib and the second vertical rib.

[0018] In connection with the first aspect of the present application, in an alternative embodiment, the reinforcing rib protrudes from the surface of the second vertical rib.

[0019] In connection with the first aspect of the present application, in an alternative embodiment, the first rib, the first horizontal rib and the third rib are arranged in parallel, and are all parallel to the moving direction of the swing frame.

[0020] In connection with the first aspect of the present application, in an alternative embodiment, the width of the first rib is greater than the outer diameter of the swing frame.

[0021] In the power tool provided by the embodiment of the present application, a first rib and a second rib are provided on the surface of the main housing. The first rib and the second rib enclose a first receiving groove for storing grease, and the first rib is opposite to the position of the slot hole. The first rib can support the swing frame when it deforms, greatly reducing the occurrence of gear skipping during the use of the power tool. In addition, the power tool provided by the embodiment of the present application uses the structure of the main housing itself to reduce the leakage of grease in the ring gearbox without adding other parts.

[0022] Additional aspects and advantages of the present application will be given in part in the following description, become apparent in part from the following description, or be learned by practice of the present application. Description of the Drawings

[0023] The drawings described herein are provided to further understand the present application and form a part of the present application. The schematic embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation to the present application. In the drawings:

[0024] Figure 1 Schematic three-dimensional structure diagram of the main housing, swing frame, ring gearbox and handle housing in the power tool provided by the embodiment of the present application;

[0025] Figure 2 Schematic specific structure diagram of the main housing in the power tool provided by the embodiment of the present application;

[0026] Figure 3 Schematic cross-sectional view of the main housing, swing frame and ring gearbox in the power tool provided by the embodiment of the present application;

[0027] Figure 4 Schematic cross-sectional view of the main housing, swing frame and ring gearbox in the power tool provided by another embodiment of the present application;

[0028] Figure 5 Schematic exploded view of the main housing and ring gearbox in the power tool provided by the embodiment of the present application;

[0029] Figure 6 is Figure 4 Enlarged view of part A in

[0030] Reference numerals:

[0031] 10, ring gearbox; 110, slot hole; 120, first mounting rib; 130, second mounting rib;

[0032] 20, main housing; 210, first rib; 220, second rib; 221, first horizontal rib; 222, first vertical rib; 223, second vertical rib; 230, third rib; 240, reinforcing rib; 20a, first receiving groove; 20b, second receiving groove;

[0033] 30, swing frame; 40, handle housing; Detailed Description of the Embodiments

[0034] Exemplary embodiments disclosed in the present application will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present application are shown in the drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the specific embodiments set forth herein. On the contrary, these embodiments are provided so that the present application can be more thoroughly understood and the scope of the present application disclosed can be fully conveyed to those skilled in the art.

[0035] In the following description, numerous specific details are given in order to provide a more thorough understanding of the present application. However, it will be apparent to one of ordinary skill in the art that the present application may be practiced without one or more of these details. In other instances, well-known features of some technologies are not described in order to avoid confusion with the present application; that is, not all features of the actual embodiments are described here, and the well-known functions and structures are not described in detail.

[0036] In the drawings, for clarity, the dimensions of layers, regions, elements, and their relative dimensions may be exaggerated. Like reference numerals denote like elements throughout.

[0037] It should be understood that when an element or layer is referred to as being "on", "adjacent to", "connected to", or "coupled to" another element or layer, it can be directly on, adjacent to, connected to, or coupled to the other element or layer, or there may be intervening elements or layers. In contrast, when an element is referred to as being "directly on", "directly adjacent to", "directly connected to", or "directly coupled to" another element or layer, there are no intervening elements or layers. It should be understood that although the terms first, second, third, etc. may be used to describe various elements, components, regions, layers, and / or parts, these elements, components, regions, layers, and / or parts should not be limited by these terms. These terms are only used to distinguish one element, component, region, layer, or part from another element, component, region, layer, or part. Thus, without departing from the teachings of the present application, the first element, component, region, layer, or part discussed below may be referred to as the second element, component, region, layer, or part. And when discussing the second element, component, region, layer, or part, it does not imply that the present application necessarily has a first element, component, region, layer, or part.

[0038] Spatial relationship terms such as "under", "below", "lower", "beneath", "above", "upper", etc. may be used herein for convenience of description to describe the relationship of one element or feature shown in the figure with other elements or features. It should be understood that, in addition to the orientation shown in the figure, spatial relationship terms are also intended to include different orientations of the device in use and operation. For example, if the device in the drawing is flipped, then an element or feature described as "under other elements" or "beneath them" or "under it" will be oriented "above" the other elements or features. Thus, the exemplary terms "under" and "beneath" can include both an upper and a lower orientation. The device may be otherwise oriented (rotated 90 degrees or other orientations) and the spatial descriptors used herein are to be interpreted accordingly.

[0039] The purpose of the terms used herein is only to describe specific embodiments and is not a limitation of the present application. As used herein, the singular forms "a", "an" and "the" are also intended to include the plural forms unless the context clearly dictates otherwise. It should also be understood that the terms "comprising" and / or "including", when used in this specification, specify the presence of the stated features, integers, steps, operations, elements and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or groups. As used herein, the term "and / or" includes any and all combinations of the associated listed items.

[0040] To fully understand the present application, detailed steps and detailed structures will be presented in the following description to illustrate the technical solutions of the present application. The preferred embodiments of the present application are described in detail below. However, in addition to these detailed descriptions, the present application may have other embodiments.

[0041] As Figure 1 and Figure 2 shown, an embodiment of the present application provides a power tool, including an annular gearbox 10, a main housing 20, a speed-changing gear ring (not shown in the figure), and a swing frame 30.

[0042] Among them, the annular gearbox 10 has two relatively arranged slot holes 110, the shape of the slot holes 110 is a kidney-shaped hole, and the shape of the slot holes 110 can also be other shapes, which are not specifically limited in the embodiments of the present application.

[0043] The main housing 20 is sleeved outside the ring gearbox 10. The outside of the ring gearbox 10 and the inside of the main housing 20 enclose a first space, and the slot hole 110 communicates with the first space. The swing frame 30 is located in the first space, surrounds the outside of the ring gearbox 10, and the swing frame 30 penetrates through the slot hole 110 and is connected to the speed change gear ring. The swing frame 30 moves in the slot hole 110 along the axial direction of the speed change gear ring, thereby driving the speed change gear ring to achieve axial movement and realizing high and low speed switching.

[0044] As Figure 2 shown, the inner wall of the main housing 20 is provided with a first rib 210 and a second rib 220. The first rib 210 and the second rib 220 enclose a first receiving groove 20a for storing the grease oozing from the slot hole 110. The first rib 210 is opposite to the slot hole 110 and there is a gap between the first rib 210 and the swing frame 30.

[0045] The operation of the gears in the ring gearbox 10 causes the gear grease to ooze out from the slot hole 110. The first receiving groove 20a can store the oozing grease. In addition, during the operation of the gears in the ring gearbox 10, part of the grease in the first receiving groove 20a will also return to the ring gearbox 10. The swing frame 30 may be deformed after long-term use. The deformed swing frame 30 moves towards the main housing 20. The first rib 210 can support the deformed swing frame 30, thereby greatly reducing the occurrence of gear shifting during the use of the power tool.

[0046] In an alternative embodiment, as Figure 1 and Figure 2 shown, the second rib 220 includes a first horizontal rib 221, a first vertical rib 222 and a second vertical rib 223. The first horizontal rib 221 is disposed opposite to the first rib 210, the first vertical rib 222 is disposed opposite to the second vertical rib 223, and the surfaces of the first vertical rib 222 and the second vertical rib 223 contact the outer wall surface of the ring gearbox 10.

[0047] The ring gearbox 10 is provided with a first mounting rib 120 and a second mounting rib 130 along its circumferential direction. The surface of the first mounting rib 120 contacts the surface of the first vertical rib 222, and the surface of the second mounting rib 130 contacts the surface of the second vertical rib 223.

[0048] The first mounting rib 120 and the second mounting rib 130 are located at the edge of the outside of the ring gearbox 10. The surfaces of the first mounting rib 120 and the second mounting rib 130 contact the surfaces of the first vertical rib 222 and the second vertical rib 223 respectively, forming an approximately closed first space for accommodating the swing frame 30, thereby effectively reducing the amount of grease oozing. At the same time, during use, part of the flowing grease returns to the ring gearbox 10.

[0049] In an alternative embodiment, asFigure 1 and Figure 2 As shown in Figure 2 , a third rib 230 is further provided on the inner wall of the main housing 20. The third rib 230 and the first horizontal rib 221 are respectively located on both sides of the first rib 210. The third rib 230, the first rib 210, the first vertical rib 222 and the second vertical rib 223 enclose a second receiving groove 20b for receiving grease.

[0050] In the embodiment of the present application, the first receiving groove 20a and the second receiving groove 20b correspond to both sides of the slot hole 110 on the annular gearbox 10, which can improve the collection effect of the grease oozing from the slot hole 110, and further reduce the amount of grease oozing.

[0051] In an alternative embodiment, as Figure 3 and Figure 4 shown, the edge of the third rib 230 contacts or abuts against the outer wall of the annular gearbox 10. Figure 3 The cross-sectional schematic diagrams of the main housing 20, the annular gearbox 10 and the swing frame 30 are shown in Figure 3 . The third rib 230 does not correspond to the swing frame 30. Therefore, the contact or abutment of the third rib 230 against the outer wall of the annular gearbox 10 can improve the sealing performance of the first space.

[0052] In an alternative embodiment, as Figure 1 and Figure 4 shown, the power tool further includes a handle housing 40. The handle housing 40 is connected to the main housing 20, and the distances between the third rib 230, the first rib 210, the first horizontal rib 221 and the handle housing 40 increase in sequence.

[0053] The operator holds the handle housing 40 during the use of the power tool. During the use of the power tool, the main housing 20 is above the handle housing 40, and under the action of gravity, the grease flows towards the handle direction. The distance between the third rib 230 and the handle housing 40 is the closest, that is, during the use of the power tool, the third rib 230 is located below the first rib 210 and the first horizontal rib 221. The contact or abutment of the third rib 230 against the outer wall of the annular gearbox 10 can greatly reduce the overflow of the grease in the first receiving groove 20a and the second receiving groove 20b.

[0054] In an alternative embodiment, as Figure 2 and Figure 5 shown, a reinforcing rib 240 is further provided on the inner wall of the main housing 20. The reinforcing rib 240 is connected to the ends of the first horizontal rib 221, the first rib 210 and the third rib 230, and the reinforcing rib 240 is connected between the first horizontal rib 221 and the second vertical rib 223.

[0055] Figure 5As shown, the thickness by which the second vertical rib 223 protrudes from the inner wall of the main housing 20 is thinner than the thickness by which the first vertical rib 222 protrudes from the inner wall of the main housing 20. The reinforcing rib 240 connected to the second vertical rib 223 can improve the structural strength.

[0056] The reinforcing rib 240 protrudes from the surface of the second vertical rib 223. The side wall of the reinforcing rib 240 contacts or abuts against the side wall of the second mounting rib 130 of the annular gearbox 10, improving the sealing of the first space, and thus reducing the overflow of grease in the first receiving groove 20a and the second receiving groove 20b.

[0057] In the first alternative embodiment, the first rib 210, the first horizontal rib 221, and the third rib 230 are arranged in parallel, and are all parallel to the axis direction of the slot hole 110 of the annular gearbox 10, that is, parallel to the moving direction of the swing frame 30. In this way, it is easier to collect the grease oozing from the slot hole 110.

[0058] In an alternative embodiment, as Figure 6 shown, the width of the first rib 210, that is Figure 6 L1 shown in Figure 6 is greater than the outer diameter of the swing frame 30, that is

[0059] L2 shown in

[0060] It should be understood that the above embodiments are all exemplary and do not cover all possible implementation manners included in the claims. Without departing from the scope of the present disclosure, various deformations and changes can be made on the basis of the above embodiments. Similarly, the various technical features of the above embodiments can be arbitrarily combined to form additional embodiments of the present application that may not be clearly described. Therefore, the above embodiments only represent several implementation manners of the present application and do not limit the protection scope of the patent of the present application.

Claims

1. An electric tool, characterized in that: include: An annular gear box having two slots arranged opposite to each other; A main housing is sleeved on the outer side of the annular gear box, the outer side of the annular gear box and the inner side of the main housing are surrounded by a first space, and the slot is connected to the first space; A speed change ring gear, located in the annular gear box; A swing frame, surrounding the outer side of the annular gear box and located in the first space, the swing frame is inserted into the slot hole and connected to the speed gear ring, and the swing frame moves in the slot hole along the axis direction of the speed gear ring; Among them, the inner wall of the main shell is provided with a first convex rib and a second convex rib, the first convex rib and the second convex rib are arranged to form a first accommodating groove, the first accommodating groove is used to store grease seeping from the slot hole, and the first convex rib is opposite to the slot hole and there is a gap between the first convex rib and the swing frame.

2. The electric tool according to claim 1, characterized in that: The second convex rib includes a first transverse rib, a first vertical rib and a second vertical rib, the first transverse rib is arranged opposite to the first convex rib, the first vertical rib is arranged opposite to the second vertical rib, and the first vertical rib and the second vertical rib surface contact the outer wall surface of the annular gear box.

3. The electric tool according to claim 2, characterized in that: The annular gear box is provided with a first mounting rib and a second mounting rib along its circumference, the surface of the first mounting rib contacts the surface of the first vertical rib, and the surface of the second mounting rib contacts the surface of the second vertical rib.

4. The electric tool according to claim 2, characterized in that: The inner wall of the main shell is also provided with a third convex rib, and the third convex rib and the first transverse rib are respectively located on both sides of the first convex rib, and the third convex rib, the first convex rib, the first vertical rib and the second vertical rib are arranged to form a second containing groove for containing the grease.

5. The electric tool according to claim 4, characterized in that: The edge of the third rib contacts or abuts against the outer wall of the annular gear box.

6. The electric tool according to claim 5, characterized in that: Also includes: A handle shell is connected to the main shell, and the distances between the third convex rib, the first convex rib and the first transverse rib and the handle shell are increased in sequence.

7. The electric tool according to claim 4, characterized in that: The inner wall of the main shell is also provided with reinforcing ribs, which are connected to the ends of the first transverse rib, the first convex rib and the third convex rib, and are connected between the first transverse rib and the second vertical rib.

8. The electric tool according to claim 7, characterized in that: The reinforcing rib protrudes from the surface of the second vertical rib.

9. The electric tool according to claim 4, characterized in that: The first convex rib, the first transverse rib and the third convex rib are arranged in parallel and are all parallel to the moving direction of the swing frame.

10. The electric tool according to claim 1, characterized in that: The width of the first convex rib is greater than the outer diameter of the swing frame.

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