Labor-saving wrench

Abstract

The utility model discloses a labor-saving wrench, and belongs to the technical field of tools. The wrench comprises a wrench head and a handle, the wrench head comprises a shell and an output piece, the output piece is rotationally connected with the shell, the shell is rotationally connected with a rotating piece, the rotating piece is rotationally connected with two gears, the two gears are coaxially arranged and fixedly connected with each other, the shell is fixedly connected with a first inner gear ring, the output piece is fixedly connected with a second inner gear ring, and the second inner gear ring is fixedly connected with the handle. By means of mutual transmission between the gear piece and the first inner gear ring and between the gear piece and the second inner gear ring, labor saving can be achieved by means of the transmission ratio between the gears and the second inner gear ring.

Description

Technical Field

[0001] The utility model relates to the technical field of tools, in particular to a labor-saving wrench. Background Art

[0002] A wrench is a commonly used installation and disassembly tool. It is a hand tool that uses the principle of leverage to twist bolts, screws, nuts and other threaded fastening bolts or nuts to open or socket fasteners. Existing wrenches can only achieve the effect of labor saving by changing the holding distance, and cannot achieve a better labor saving effect. Therefore, a new type of white wrench is needed to solve this problem. Utility Model Content

[0003] Other features and advantages of the utility model will be described in the following description, and partly become apparent from the description, or understood by implementing the utility model. The purpose and other advantages of the utility model can be realized and obtained through the structures specifically pointed out in the description and other drawings of the description.

[0004] The purpose of the utility model is to overcome the above-mentioned shortcomings and provide a labor-saving wrench.

[0005] To achieve the above-mentioned purpose, the technical solution of the utility model is: a labor-saving wrench, comprising a wrench head and a handle, the wrench head comprising a shell and an output member, the output member is rotatably connected to the shell, the shell is rotatably connected to a rotating member, two gears are rotatably connected to the rotating member, the two gears are coaxially arranged, and the two gears are fixedly connected to each other, the shell is fixedly connected to an inner gear ring 1, the output member is fixedly connected to an inner gear ring 2, and the two gears are respectively meshed with the inner gear ring 1 and the inner gear ring 2.

[0006] By adopting the above technical solution, when loosening or tightening the bolt, the output member is sleeved on the bolt, the rotating member is held with one hand, and the handle is held with the other hand, and then the handle is pushed to rotate around the bolt. The handle will drive the housing to rotate around the rotating member, and at the same time, the inner gear ring 1 will also rotate around the rotating member, thereby driving the two gears fixed together to rotate together, and the gear meshing with the inner gear ring 2 will transmit the rotation to the output member through the inner gear ring 2, so that the output member can unscrew the bolt. In this way, the transmission ratio between the gear and the inner gear ring 2 can be used to achieve labor saving.

[0007] Preferably, the two gears are integrally formed into a gear member, the rotating member is provided with a rotating groove, the gear member is arranged in the rotating groove, a pin is provided through the gear member, and the gear member is rotatably connected to the rotating member via the pin.

[0008] The utility model utilizes a pin shaft to realize the rotation connection between the rotating part and the gear part.

[0009] Preferably, spacers are arranged on both sides of the gear member, and the spacers are sleeved on the pin shaft. The utility model can separate the gear member from the rotating member by using the spacers, so that no wear occurs between the gear member and the rotating member.

[0010] Preferably, one end of the rotating member is rotatably connected to the housing through a bearing, and the other end of the rotating member is rotatably connected to the output member through a bearing. The utility model utilizes bearings to reduce resistance between the rotating member and the housing and the output member, making the rotation process smoother and reducing wear.

[0011] Preferably, one side of the shell is provided with an end cover 1 for limiting the rotating member, and the other side of the shell is provided with an end cover 2 for limiting the output member. The rotating member and the output member can be limited by using the end cover 1 and the end cover 2 so that they cannot escape from the shell.

[0012] Preferably, the end cover 1 and the end cover 2 are both fixedly connected to the housing by bolts. The utility model utilizes the threaded connection between the bolts and the housing so that the end cover 1 and the end cover 2 can be fixed between the bolts and the housing.

[0013] Preferably, the output member includes a rotating body and a sleeve, the sleeve is connected to the rotating body through a square pin, and the sleeve and the square pin are penetrated to form a plug hole for inserting the plug. The utility model cooperates with the bolt through the sleeve, and the sleeve can be disassembled and replaced by pulling out the plug from the plug hole, so as to adapt to bolts with different screw heads, and the inner gear ring is secondly formed on the rotating body.

[0014] Preferably, the handle is provided with a slide groove, a connecting piece is slidably connected in the slide groove, a turning handle is threadedly connected to the connecting piece, and the handle is clamped between the turning handle and the connecting piece. The turning handle of the utility model can slide and rotate in the slide groove, so that the handle can be rotated more conveniently by using the turning handle, and the position of the turning handle can be adjusted according to the need to adjust the length of the force arm.

[0015] Preferably, the rotating member is fixedly connected with a handle. The utility model utilizes the handle to make the rotating member easier to hold.

[0016] In summary, the beneficial effects of the utility model are:

[0017] 1. By utilizing the mutual transmission between the gear member and the inner gear ring 1 and the inner gear ring 2, the transmission ratio between the gear and the inner gear ring 2 can be utilized to achieve labor saving.

[0018] 2. The turning handle can slide and rotate in the slide groove, so that the handle can be rotated more conveniently by using the turning handle, and the position of the turning handle can be adjusted to adjust the length of the force arm as needed.

[0019] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure.

[0020] Undoubtedly, these and other objects of the present invention will become more apparent after the following detailed description of the preferred embodiments described with reference to various figures and drawings.

[0021] In order to make the above and other purposes, features and advantages of the present invention more obvious and understandable, one or several preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation to the present invention.

[0023] In the drawings, the same reference numerals are used for the same components and the drawings are schematic and not necessarily drawn to scale.

[0024] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only one or several embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on such drawings without paying creative work.

[0025] Figure 1 It is a schematic diagram of the overall cross-sectional structure.

[0026] Explanation of main figure marks: 1. housing; 2. output member; 3. rotating member; 4. inner ring gear 1; 5. inner ring gear 2; 6. gear member; 7. rotating groove; 8. pin shaft; 9. spacer; 10. bearing; 11. end cover 1; 12. end cover 2; 13. rotating body; 14. sleeve; 15. square pin; 16. socket; 17. connecting member; 18. turning handle; 19. handle; 20. grip. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with specific implementation methods. It should be understood that the specific implementation methods described here are only used to explain the utility model, but not to limit the utility model.

[0028] In addition, in the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0029] In the present utility model, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral one; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. However, if it is indicated as a direct connection, it means that the two connected bodies are not connected through a transition structure, but are connected to form a whole through a connecting structure. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to the specific circumstances.

[0030] In the present utility model, unless otherwise clearly specified and limited, the first feature "above" or "below" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments or examples.

[0031] like Figure 1 As shown, a labor-saving wrench includes a wrench head and a handle 20, the wrench head includes a shell 1 and an output member 2, the output member 2 is rotatably connected to the shell 1, the shell 1 is rotatably connected to a rotating member 3, the rotating member 3 is rotatably connected to two gears, the two gears are coaxially arranged, and the two gears are fixedly connected to each other, the shell 1 is fixedly connected to an inner ring gear 1 4, the output member 2 is fixedly connected to an inner ring gear 2 5, and the two gears are respectively meshed with the inner ring gear 1 4 and the inner ring gear 2 5.

[0032] By adopting the above technical solution, when loosening or tightening the bolt, the output member 2 is sleeved on the bolt, the rotating member 3 is held with one hand, and the handle 20 is held with the other hand, and then the handle 20 is pushed to rotate around the bolt. The handle 20 will drive the housing 1 to rotate around the rotating member 3, and the inner ring gear 1 4 will also rotate around the rotating member 3, thereby driving the two gears fixed together to rotate together, and the gear meshing with the inner ring gear 2 5 will transmit the rotation to the output member 2 through the inner ring gear 2 5, so that the output member 2 can unscrew the bolt. In this way, the transmission ratio between the gear and the inner ring gear 2 5 can be used to achieve labor saving.

[0033] The two gears are integrally formed into a gear member 6. The rotating member 3 is provided with a rotating groove 7. The gear member 6 is arranged in the rotating groove 7. A pin shaft 8 is provided through the gear member 6. The gear member 6 is rotatably connected to the rotating member 3 via the pin shaft 8. The rotating connection between the rotating member 3 and the gear member 6 is realized by the pin shaft 8.

[0034] Spacers 9 are arranged on both sides of the gear member 6, and the spacers 9 are sleeved on the pin 8. The spacers 9 can be used to separate the gear member 6 from the rotating member 3, so that no wear occurs between the gear member 6 and the rotating member 3.

[0035] One end of the rotating member 3 is rotatably connected to the housing 1 through a bearing 10, and the other end of the rotating member 3 is rotatably connected to the output member 2 through a bearing 10. The bearing 10 can reduce the resistance between the rotating member 3 and the housing 1 and the output member 2, making the rotation process smoother and reducing wear.

[0036] An end cover 11 for limiting the rotating member 3 is provided on one side of the shell 1, and an end cover 12 for limiting the output member 2 is provided on the other side of the shell 1. The end cover 11 and the end cover 12 can be used to limit the rotating member 3 and the output member 2 so that they cannot escape from the shell 1.

[0037] The end cover 1 11 and the end cover 2 12 are both fixedly connected to the housing 1 by bolts. The end cover 1 11 and the end cover 2 12 can be fixed between the bolts and the housing 1 by the threaded connection between the bolts and the housing 1.

[0038] The output member 2 includes a rotating body 13 and a sleeve 14. The sleeve 14 is connected to the rotating body 13 through a square pin 15. The sleeve 14 and the square pin 15 are penetrated to form a plug hole 16 for inserting a plug. The sleeve 14 cooperates with the bolt, and the sleeve 14 can be disassembled and replaced by pulling out the plug from the plug hole 16, so as to adapt to bolts with different screw heads. The inner gear ring 25 is formed on the rotating body 13.

[0039] The handle 20 is provided with a slide groove, in which a connecting member 17 is slidably connected, and a turning handle 18 is threadedly connected to the connecting member 17, and the handle 20 is clamped between the turning handle 18 and the connecting member 17. The turning handle 18 can slide and rotate in the slide groove, so that the handle 20 can be rotated more conveniently by using the turning handle 18, and the position of the turning handle 18 can be adjusted according to the needs to adjust the length of the force arm.

[0040] The rotating member 3 is fixedly connected with a handle 19. The handle 19 is used to make the rotating member 3 easier to hold.

[0041] It should be noted that many specific details are set forth in the above description to facilitate a full understanding of the present invention. However, the present invention can also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

Claims

1. A labor-saving wrench, comprising a wrench head and a handle (20), characterized in that: The wrench head comprises a housing (1) and an output member (2), wherein the output member (2) is rotatably connected to the housing (1), the housing (1) is rotatably connected to a rotating member (3), the rotating member (3) is rotatably connected to two gears, the two gears are coaxially arranged and fixedly connected to each other, the housing (1) is fixedly connected to an inner gear ring 1 (4), the output member (2) is fixedly connected to an inner gear ring 2 (5), and the two gears are respectively meshed with the inner gear ring 1 (4) and the inner gear ring 2 (5).

2. The labor-saving wrench according to claim 1, characterized in that: The two gears are integrally formed into a gear member (6); the rotating member (3) is provided with a rotating groove (7); the gear member (6) is arranged in the rotating groove (7); a pin shaft (8) is provided through the gear member (6); and the gear member (6) is rotatably connected to the rotating member (3) via the pin shaft (8).

3. The labor-saving wrench according to claim 2, characterized in that: Spacers (9) are arranged on both sides of the gear member (6), and the spacers (9) are sleeved on the pin shaft (8).

4. The labor-saving wrench according to claim 1, characterized in that: One end of the rotating member (3) is rotatably connected to the housing (1) via a bearing (10), and the other end of the rotating member (3) is rotatably connected to the output member (2) via a bearing (10).

5. The labor-saving wrench according to claim 1, characterized in that: One side of the housing (1) is provided with an end cover (11) for limiting the position of the rotating member (3), and the other side of the housing (1) is provided with an end cover (12) for limiting the position of the output member (2).

6. The labor-saving wrench according to claim 5, characterized in that: The end cover 1 (11) and the end cover 2 (12) are both fixedly connected to the housing (1) by bolts.

7. The labor-saving wrench according to claim 1, characterized in that: The output member (2) comprises a rotating body (13) and a sleeve (14), wherein the sleeve (14) is connected to the rotating body (13) via a square pin (15), and a plug hole (16) for inserting a plug pin is formed through the sleeve (14) and the square pin (15).

8. The labor-saving wrench according to claim 1, characterized in that: The handle (20) is provided with a slide groove, a connecting piece (17) is slidably connected in the slide groove, the connecting piece (17) is threadedly connected to a turning handle (18), and the handle (20) is clamped between the turning handle (18) and the connecting piece (17).

9. The labor-saving wrench according to claim 1, characterized in that: The rotating member (3) is fixedly connected with a handle (19).

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