Gearbox structure and electric tool

Abstract

The utility model discloses a gearbox structure and an electric tool, the gearbox structure comprises two oppositely arranged gearbox covers, a positioning piece, a friction plate and a supporting piece, and the positioning piece is arranged on the inner wall of the gearbox cover; the friction plates are correspondingly attached to the inner walls of the two gearbox covers respectively, and each friction plate is provided with a positioning hole for the positioning piece to penetrate through. The supporting piece is located between the two friction plates, and the end of the supporting piece abuts against the surfaces of the friction plates. The positioning piece is arranged on the gear box cover, the holes are formed in the friction plates, so that the friction plates are fixed, then the two friction plates are attached to the gear box cover through the supporting pieces, the structure is simple, and the damage probability of the shell is reduced.

Description

Technical Field

[0001] The present application belongs to the technical field of electric tools, and specifically relates to an improved gearbox structure and an electric tool having the gearbox structure. Background Art

[0002] Gearboxes are a common structure in power tools. If the gears directly contact the tool housing, the gears and the tool housing will continue to rub during long-term use. The heat generated may cause damage to the housing and affect the stability of the tool.

[0003] The information disclosed in this background technology section is only intended to enhance the understanding of the overall background of the application and should not be regarded as an admission or any form of suggestion that the information constitutes the prior art already known to a person skilled in the art. Utility Model Content

[0004] The purpose of this application is to provide a gearbox structure to solve the problem of gearbox housing damage.

[0005] In order to achieve the above-mentioned purpose, a specific embodiment of the present application provides a gear box structure, including two gear box covers, a positioning member, a friction plate and a support member arranged opposite to each other, wherein the positioning member is arranged on the inner wall of the gear box cover; the friction plates are respectively attached to the inner walls of the two gear box covers, and each friction plate is provided with a positioning hole for the positioning member to pass through; the support member is located between the two friction plates and the end of the support member is against the surface of the friction plate.

[0006] In one or more embodiments of the present application, the cross-sectional shape of the positioning member and the shape of the positioning hole are non-circular.

[0007] In one or more embodiments of the present application, the cross-sectional shape of the positioning member and the shape of the positioning hole are cross-shaped or polygonal.

[0008] In one or more embodiments of the present application, a plurality of the positioning members are protruding from the inner wall of each gear box, and a plurality of the positioning holes are opened on each friction plate, and the number of the positioning members and the positioning holes are the same and correspond one to one; a groove is provided on the side wall of the gear box cover, and the friction plate includes a positioning portion protruding into the groove, the positioning portion abuts against the side wall of the groove, the positioning member is provided in the groove, and the positioning hole is opened on the positioning portion.

[0009] In one or more embodiments of the present application, the positioning member and the gear box cover are integrally formed.

[0010] In one or more embodiments of the present application, the gearbox structure further includes a supporting portion for supporting the supporting member, the supporting member is an elastic member, and the positioning member is connected to the supporting portion.

[0011] In one or more embodiments of the present application, the gearbox structure further includes a supporting portion for supporting the supporting member, the supporting member is an elastic member, the supporting portion protrudes from the friction plate, and is coaxially arranged with the positioning member.

[0012] In one or more embodiments of the present application, the support member is a spring, and the spring is sleeved on the support portion.

[0013] In one or more embodiments of the present application, one of the gear box covers is detachably connected to the positioning member, and the other gear box cover is provided with a mounting hole for inserting the positioning member.

[0014] The present application also provides an electric tool, comprising a housing, the gearbox structure as described above, a motor, a battery pack and working accessories, the housing being formed with a battery adapter, the motor being at least partially accommodated in the housing and connected to the gearbox structure, the battery pack being connected to the battery adapter and providing energy to the motor, and the working accessories being connected to the gearbox structure.

[0015] Compared with the prior art, the present application fixes the friction plate by setting a positioning piece on the gear box cover and opening a hole on the friction plate, and then fits the two friction plates to the gear box cover through a support piece. The structure is simple and the probability of damage to the outer shell is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments recorded in this application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 This is a schematic diagram of a gearbox structure in one embodiment of the present application;

[0018] Figure 2 This is a schematic diagram of a single-sided gearbox, spring, and friction plate in one embodiment of the present application;

[0019] Figure 3 This is a schematic diagram of a gearbox in one embodiment of the present application;

[0020] Figure 4 A schematic diagram of a friction plate in one embodiment of the present application;

[0021] Figure 5 This is a schematic diagram of a single-sided gearbox, spring and friction plate in another embodiment of the present application.

[0022] Description of main reference numerals:

[0023] 10-gear box cover, 11-positioning piece, 12-groove, 20-friction plate, 21-positioning hole, 22-positioning part, 30-spring. DETAILED DESCRIPTION

[0024] In order to enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of this application.

[0025] Example 1

[0026] like Figure 1-4 As shown, the gearbox structure in one embodiment of the present application includes two gearbox covers 10, two friction plates 20, and a support member 30. The space between the two friction plates 20 is used to accommodate the gear set. The two gearbox covers 10 are arranged opposite each other, and each gearbox cover 10 is provided with a positioning member 11. The two friction plates 20 are also arranged opposite each other, respectively attached to the inner walls of the two gearbox covers 10, and each friction plate 20 is provided with a positioning hole 21 for the positioning member 11 to pass through. The support member 30 is located between the two friction plates 20, with both ends of the support member 30 abutting against the surfaces of the friction plates 20.

[0027] The present application realizes the positioning of the friction plate 20 in the gear box cover 10 by cooperating with the positioning member 11 and the positioning hole 21, and affixes the friction plate 20 to the inner wall of the corresponding gear box cover 10 through the support member 30. This method has a simple structure, reduces the installation steps, reduces the assembly cost, and will not cause missing installation, avoids the situation of structural failure caused by falling off, and has higher stability.

[0028] In one embodiment, in order to improve the positioning effect of the positioning member 11 and the positioning hole 21 and prevent the friction plate 20 from rotating after the positioning member 11 is inserted into the positioning hole 21, the cross-sectional shape of the positioning member 11 is set to be non-circular, and the shape of the positioning hole 21 is the same as the cross-sectional shape of the positioning member 11, so that when the friction plate 20 tends to rotate, the pin 11 can block the side wall of the positioning hole 21, so that the position of the friction plate 20 in the gear box cover 10 will not change, and the stability is higher.

[0029] In such Figure 3 In the embodiment shown, the cross-sectional shape of the positioning member 11 and the shape of the positioning hole 21 are set to be a cross, but they can also be set to be a rectangle, triangle or other polygons, etc., which is not limited in this embodiment.

[0030] Preferably, multiple positioning members 11 are provided on the inner wall of each gear case cover 10, and multiple positioning holes 21 are provided on each friction plate 20. The number of positioning members 11 and positioning holes 21 is equal and corresponds one to one. By providing multiple sets of positioning members 11 and positioning holes 21, multiple positioning points are created between the friction plate 20 and the gear case cover 10. This ensures that if one set of positioning members 11 and positioning holes 21 fails, the other sets can still provide positioning, thereby improving stability.

[0031] Furthermore, a groove 12 is provided on the side wall of the gear case cover 10, and the friction plate 20 is provided with a positioning portion 22 that protrudes into the groove 12. The positioning member 11 is disposed in the groove 12, and the positioning hole 21 is defined in the positioning portion 22. After the friction plate 20 is placed in place, the positioning member 11 is inserted into the positioning hole 21. At this time, the positioning portion 22 is inserted into the groove 12 and abuts the side wall of the groove 12. Therefore, in addition to the positioning function provided by the combination of the positioning member 11 and the positioning hole 21, the combination of the positioning portion 22 and the groove 12 also provides an auxiliary positioning function, further preventing the friction plate 20 from moving.

[0032] like Figure 2 and 3 As shown, two opposing grooves 12 are provided on the gear case cover 10, and two positioning portions 22 are provided on the friction plate 20. Due to the structure and size of the friction plate 20, two positioning holes 21 are provided, with each positioning portion 22 having one positioning hole 21. In other embodiments, while maintaining the rigidity of the positioning member 11, the size of the positioning member 11 and the positioning holes 21 can be reduced, multiple positioning holes 21 can be provided on each positioning portion 22, and multiple positioning members 11 can be positioned within the groove 12 to increase the number of positioning points and support members 30, thereby improving stability and jacking effect.

[0033] In one embodiment, the positioning member 11 and the gear box cover 10 may be integrally formed, which provides higher strength and greater stability under long-term high-intensity operation.

[0034] Alternatively, in other embodiments, the positioning member 11 and the gearbox cover 10 may be removably secured to each other. For example, a mounting hole (not shown) may be provided in the gearbox cover 10, into which the positioning member 11 is inserted. The mounting hole may have the same shape as the positioning member 11, and the positioning member 11 may be directly inserted into the mounting hole. Alternatively, a screw hole may be provided in the gearbox cover 10, one end of the positioning member 11 may be threaded, and the positioning member 11 may be screwed into the hole. This embodiment is not limiting.

[0035] The detachable fixing method is more flexible, the positioning member 11 can be produced separately, and it is relatively easier to drill holes when producing the gear box cover 10.

[0036] Preferably, the gearbox structure is further provided with a support portion for preventing displacement of the support member 30. In one embodiment, the support portion can be connected to the positioning member 11, that is, the positioning member 11 is extended, with the lower half of the support portion being used to position the friction plate 20, and the portion exposed from the friction plate 20 being used to provide support for the support member 30.

[0037] Alternatively, the support portion may also protrude from the surface of the friction plate 20 and be coaxially arranged with the positioning member 11, that is, the positioning member 11 is only used to position the friction plate 20, which may or may not be exposed from the surface of the friction plate 20, and the support portion protruding from the friction plate 20 is used to provide support for the support member 30.

[0038] In one embodiment, the support member 30 is an elastic member, which can provide a certain buffering effect while providing support and has high flexibility. Figure 1 and 2 In the embodiment shown, the support member 30 is a spring squeezed between the two friction plates 20, which is sleeved on the positioning member 11 (or support portion) and can provide support and cushioning for the friction plates 20 while preventing movement, and has high stability.

[0039] During assembly, the two friction plates 20 are respectively attached to the inner walls of the two gear box covers 10 (if the positioning part 11 is independent, the positioning part 11 needs to be assembled to the gear box cover 10 first), and the support part 30 is sleeved on the positioning part 11 on one side. After the positioning part 11 on the other side is sleeved into the support part 30, the two gear box covers 10 are fixed and assembled.

[0040] Example 2

[0041] In the above embodiment, each gear box cover 10 is provided with a positioning member 11, so the number of positioning members 11 is relatively large. In this regard, the present application also provides another embodiment, which can reduce the number of positioning members 11 by half compared with the above embodiment.

[0042] Specifically, the gearbox structure in this embodiment also includes the gearbox cover 10, the friction plate 20 and the support member 30, and only the length of the positioning member 11 is changed (eg Figure 5 As shown in FIG. 1 , when the two gear box covers 10 are assembled, the ends of the positioning member 11 are connected to the two gear box covers 10, and the spring is entirely sleeved outside the positioning member 11. This arrangement requires only half the number of positioning members 11 in Example 1, and the support member 30 will not be distorted, thereby affecting the lifting support effect.

[0043] In this embodiment, the positioning member 11 can be integrally formed with one of the gear box covers 10 and detachably fixed to the other gear box cover 10 (with a mounting hole).

[0044] Alternatively, the positioning member 11 can be independent and removably fixed to both gearbox covers 10 (with mounting holes provided in both gearbox covers 10). When providing the mounting holes, the mounting holes in both gearbox covers 10 can have the same cross-sectional shape as the positioning member 11. Alternatively, a screw hole can be provided in one of the gearbox covers 10, with one end of the positioning member 11 threaded, while the mounting hole in the other gearbox cover 10 has the same cross-sectional shape as the positioning member 11.

[0045] During assembly, fix the positioning piece 11 on one of the gear box covers 10 (if one of the mounting holes is a screw hole, operate the screw hole end), fit the two friction plates 20 to the two gear box covers 10 respectively, then pass the spring through the outside of the positioning piece 11, and finally align the positioning piece 11 with the mounting hole on the other gear box cover 10, fix the two gear boxes 10 and complete the assembly.

[0046] The present application also provides a power tool (primarily a reciprocating power tool such as a reciprocating saw), which, in addition to the aforementioned gearbox structure, also includes a housing, a motor, a battery pack, and working accessories. A battery adapter is formed within the housing, at least a portion of the motor is housed within the housing and connected to the gearbox structure, the battery pack is connected to the battery adapter to provide energy to the motor, and the working accessories (such as a saw blade) are connected to the gearbox structure and driven thereby.

[0047] It will be apparent to those skilled in the art that the present application is not limited to the details of the exemplary embodiments described above, and that the present application can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present application is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0048] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A gearbox structure, characterized in that: include: Two gear box covers (10) arranged opposite to each other; A positioning member (11) is provided on the inner wall of the gear box cover (10); Friction plates (20) are respectively attached to the inner walls of the two gear box covers (10), and each friction plate (20) is provided with a positioning hole (21) for the positioning member (11) to pass through; and The support member (30) is located between the two friction plates (20), and the end of the support member (30) abuts against the surface of the friction plate (20).

2. The gearbox structure according to claim 1, characterized in that: The cross-sectional shape of the positioning member (11) and the shape of the positioning hole (21) are non-circular.

3. The gearbox structure according to claim 2, characterized in that: The cross-sectional shape of the positioning member (11) and the shape of the positioning hole (21) are cross-shaped or polygonal.

4. The gearbox structure according to claim 1, characterized in that: A plurality of positioning members (11) are protruded from the inner wall of each gear box cover (10), and a plurality of positioning holes (21) are opened on each friction plate (20), and the number of positioning members (11) and positioning holes (21) is the same and corresponds one to one; A groove (12) is provided on the side wall of the gear box cover (10); the friction plate (20) includes a positioning portion (22) protruding into the groove (12); the positioning portion (22) abuts against the side wall of the groove (12); the positioning member (11) is provided in the groove (12); and the positioning hole (21) is opened on the positioning portion (22).

5. The gearbox structure according to claim 1, characterized in that: The positioning member (11) and the gear box cover (10) are integrally formed.

6. The gearbox structure according to claim 1, characterized in that: It also includes a supporting portion for supporting the supporting member (30), the supporting member (30) is an elastic member, and the positioning member (11) is connected to the supporting portion.

7. The gearbox structure according to claim 1, characterized in that: It also includes a supporting portion for supporting the supporting member (30), wherein the supporting member (30) is an elastic member, and the supporting portion protrudes from the friction plate (20) and is coaxially arranged with the positioning member (11).

8. The gearbox structure according to claim 6 or 7, characterized in that: The support member (30) is a spring, and the spring is sleeved on the support portion.

9. The gearbox structure according to claim 1, characterized in that: One of the gear box covers (10) is detachably connected to the positioning piece (11), and the other gear box cover (10) is provided with a mounting hole for inserting the positioning piece (11).

10. An electric tool, characterized in that: include: a housing formed with a battery adapter; The gearbox structure according to any one of claims 1 to 9; a motor at least partially housed in the housing and connected to the gearbox structure; a battery pack connected to the battery adapter and providing energy to the motor; The working accessories are connected to the gearbox structure.

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