Locking wrench mechanism

Abstract

The utility model belongs to the technical field of handheld electric tool locking mechanisms, and particularly relates to a locking wrench mechanism. The locking wrench mechanism comprises an adjusting support arranged in a rotating mode, and a locking rod is arranged at the rotating end of the adjusting support; the adjusting guide plate is arranged on one side of the rotating end, and a guide arc-shaped through hole matched with the locking rod is formed in the adjusting guide plate; a locking sleeve is arranged at the end, penetrating out of the guiding arc-shaped through hole, of the locking rod and connected with a locking wrench. And the limiting plate is arranged in the locking direction of the locking wrench so as to abut against the locking wrench when the locking wrench drives the locking sleeve to rotate relative to the locking rod to be tightly attached to the adjusting guide plate and the adjusting support is fixed relative to the adjusting guide plate. According to the locking wrench mechanism, on the premise that it is guaranteed that the adjusting support is locked, the effective service life of the locking mechanism cannot be damaged due to excessive locking, and the service life of the locking wrench mechanism is greatly prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of locking mechanisms for handheld electric tools, and in particular relates to a locking wrench mechanism. Background Art

[0002] A handheld power tool is a small tool that uses a small motor as power and a transmission mechanism to drive the working head to perform operations. Handheld power tools are easy to carry and simple to use, and have been widely used in various industries. Many categories of handheld power tools have become essential tools for production and life. For example, a handheld electric circular saw is an essential tool for carpentry and other types of work. A handheld electric circular saw is a tool that uses a single-phase series-excited motor as power and a transmission mechanism to drive a circular saw blade for sawing operations. It is widely used in the construction, decoration, furniture and other industries, and can saw wood, fiberboard, plastic, soft cables and similar materials.

[0003] The sawing angle adjustment is an essential function of a handheld electric circular saw. Currently, the sawing angle adjustment is achieved by adjusting the angle of the circular saw blade bracket. After each angle adjustment, the circular saw blade bracket needs to be locked. At present, the locking mechanism of many handheld electric circular saws is just a wrench. Every time the user locks, he tends to deliberately turn the wrench very tightly. This can achieve a very tight locking effect in the early stage, but it also means that it is difficult to loosen, and the user has to overcome the very tight locking state when loosening. It is equivalent to tightening and loosening each time, which will damage the effective life of the lock twice, causing the locking mechanism of the current handheld electric circular saw to fail much earlier than the preset time. Utility Model Content

[0004] The utility model aims to provide a locking wrench mechanism to solve the technical problem that a handheld electric circular saw may be over-locked and its effective locking life may be damaged due to the uncertain locking stroke of the locking mechanism of the circular saw blade bracket.

[0005] In order to solve the above technical problems, the utility model provides a locking wrench mechanism, comprising: a rotatable adjustment bracket, a locking rod being provided at a rotating end thereof; an adjustment guide plate, which is arranged on one side of the rotating end and has a guide arc through hole adapted to the locking rod; a locking sleeve is provided at one end of the locking rod passing through the guide arc through hole, and the locking sleeve is connected to the locking wrench; a limit plate, which is arranged in the locking direction of the locking wrench, so that when the locking wrench drives the locking sleeve to rotate relative to the locking rod and is close to the adjustment guide plate, the adjustment bracket is abutted against the locking wrench when it is fixed relative to the adjustment guide plate.

[0006] Furthermore, the abutting portion between the limiting plate and the locking wrench is located on the perpendicular midline of the line connecting the midpoints of the two bottom sides of the guiding arc-shaped through hole.

[0007] Furthermore, the locking sleeve includes: a locking nut, which is threadedly matched with one end of the locking rod passing through the guide arc-shaped through hole; and the locking wrench is provided with a wrench hole adapted to the locking nut so as to be sleeved on the locking nut.

[0008] Furthermore, the inner wall of the wrench hole fits with the outer wall of the locking nut so as to immediately drive the locking nut when the locking wrench is rotated in the locking direction.

[0009] Furthermore, the locking nut is a slotted nut, and an open retaining ring is provided in the slot thereof to axially limit the locking wrench sleeved on the locking nut.

[0010] Furthermore, a washer is provided between the locking nut and the adjusting guide plate; and an elastic ring is provided between the washer and the locking nut.

[0011] Furthermore, an adjusting arc-shaped through hole is opened at the rotating end of the adjusting bracket; the locking rod comprises: a rod body, one end of which is connected to a stop cap, so that after the other end passes through the adjusting arc-shaped through hole and the guide arc-shaped through hole, the stop cap and the adjusting bracket are abutted; a section of the rod body located in the adjusting arc-shaped through hole is provided with a limit block.

[0012] Furthermore, the rotating end of the adjusting bracket is in contact with the adjusting guide plate.

[0013] The beneficial effect of the utility model is that the utility model aims to solve the technical problem that the locking stroke of the locking mechanism of the circular saw blade bracket of the hand-held electric circular saw is uncertain, and the effective locking life will be damaged by over-tightening. The locking wrench mechanism can allow the locking rod on the adjusting bracket to pass through the guiding arc through hole by setting a guiding arc through hole. A locking sleeve can be set at one end of the locking rod passing through the guiding arc through hole. The locking sleeve can be pre-set with the locking rod. In this way, when the locking wrench drives the locking sleeve to rotate relative to the locking rod and press against the adjusting guide plate, so that the adjusting bracket is fixed relative to the adjusting guide plate, the locking wrench just abuts against the limit plate. Therefore, under the premise of ensuring the locking of the adjusting bracket, the effective life of the locking mechanism will not be damaged by over-tightening, so that the service life of the locking wrench mechanism is greatly extended. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the prior descriptions will be briefly introduced below. Obviously, the drawings in the following description are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0015] Figure 1 This is a schematic diagram of the structure of the locking wrench mechanism of the utility model. Figure 1 ;

[0016] Figure 2 This is a schematic diagram of the structure of the locking wrench mechanism of the utility model. Figure 2 ;

[0017] Figure 3 This is a schematic diagram of the structure of the locking wrench mechanism of the utility model. Figure 3 ;

[0018] Figure 4 It is a structural schematic diagram of the locking wrench mechanism of the utility model after the adjusting bracket is rotated;

[0019] Figure 5 This is a schematic diagram of the structure of the locking wrench mechanism of the utility model. Figure 4 ;

[0020] Figure 6 This is a schematic diagram of the structure of the locking wrench mechanism of the utility model. Figure 5 ;

[0021] In the figure:

[0022] Adjust the bracket 100, rotate the end 110, adjust the arc-shaped through hole 111,

[0023] The locking rod 200, the rod body 210, the stop cap 220, the limit block 230,

[0024] Adjust the guide plate 300 to guide the arc-shaped through hole 310,

[0025] Locking sleeve 400, locking nut 410, open retaining ring 420, washer 430, elastic ring 440,

[0026] Locking wrench 500, wrench hole 510,

[0027] The limiting plate 600 and the abutting portion 610 . DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution of the utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments of ordinary technicians in this field without creative work are within the protection scope of the utility model.

[0029] Example

[0030] like Figure 1 As shown, the utility model provides a locking wrench mechanism, comprising: an adjusting bracket 100 arranged to rotate, a locking rod 200 being provided at the rotating end 110 thereof; Figure 2, an adjustment guide plate 300, which is arranged on one side of the rotating end 110 and has a guide arc-shaped through hole 310 adapted to the locking rod 200; combined Figure 3 A locking sleeve 400 is provided at one end of the locking rod 200 that passes through the guide arc-shaped through hole 310, and the locking sleeve 400 is connected to the locking wrench 500; a limiting plate 600 is arranged in the locking direction of the locking wrench 500, so that when the locking wrench 500 drives the locking sleeve 400 to rotate relative to the locking rod 200 and is close to the adjustment guide plate 300, the adjustment bracket 100 is fixed relative to the adjustment guide plate 300, and the limiting plate 600 is against the locking wrench 500.

[0031] The locking wrench mechanism of the present invention is provided with a guide arc through hole 310, so that the locking rod 200 on the adjustment bracket 100 can pass through the guide arc through hole 310, and a locking sleeve 400 can be provided at one end of the locking rod 200 passing through the guide arc through hole 310, and the locking sleeve 400 can be pre-set with the locking rod 200, so that when the locking wrench 500 drives the locking sleeve 400 to rotate relative to the locking rod 200 and is close to the adjustment guide plate 300, so that the adjustment bracket 100 is fixed relative to the adjustment guide plate 300, the locking wrench 500 just abuts against the limit plate 600, so that under the premise of ensuring the locking of the adjustment bracket 100, the effective life of the locking mechanism will not be damaged by excessive tightening, so that the service life of the locking wrench mechanism of the present invention is greatly extended.

[0032] like Figure 4 As shown, the abutment portion 610 of the limit plate 600 and the locking wrench 500 is located on the perpendicular bisector of the line connecting the midpoints of the two bottom sides of the guide arc through hole 310, so that when the adjustment bracket 100 is rotated to any position along the guide arc through hole 310, the locking wrench 500 drives the locking sleeve 400 to rotate relative to the locking rod 200 and fit closely to the adjustment guide plate 300, so that when the adjustment bracket 100 is fixed relative to the adjustment guide plate 300, the locking wrench 500 can just abut against the limit plate 600.

[0033] like Figure 5 As shown, in at least one embodiment, the locking sleeve 400 may include: a locking nut 410, which is threadedly matched with one end of the locking rod 200 passing through the guide arc-shaped through hole 310; and the locking wrench 500 is provided with a lever hole 510 adapted to the locking nut 410, so as to be sleeved on the locking nut 410. In at least one embodiment, the locking nut 410 is a hexagonal nut, and the lever hole 510 is a regular tetragonal hole.

[0034] like Figure 6As shown, the inner wall of the lever hole 510 fits with the outer wall of the locking nut 410, so that the locking nut 410 is immediately driven when the locking wrench 500 rotates in the locking direction. In at least one embodiment, the inner diameter of the opposite side of the lever hole 510 can be 0.5mm to 1.5mm smaller than the opposite side diameter of the locking nut 410, so that the locking wrench 500 is fully fitted with the locking nut 410 after being inserted into the locking nut 410.

[0035] like Figure 5 and Figure 6 As shown, in at least one embodiment, the locking nut 410 is a slotted nut, and an open retaining ring 420 is provided in the slot thereof to axially limit the locking wrench 500 sleeved on the locking nut 410 .

[0036] like Figure 5 As shown, a washer 430 is provided between the locking nut 410 and the adjusting guide plate 300; and an elastic ring 440 is provided between the washer 430 and the locking nut 410. The electric circular saw generates vibrations when it is working. By providing the washer 430 and the elastic ring 440, the influence of the vibrations on the engagement between the locking nut 410 and the locking rod 200 can be reduced, and the locking nut 410 can be ensured to always fix the adjusting bracket 100 relative to the adjusting guide plate 300 through the washer 430 and the elastic ring 440 during the operation of the electric circular saw, thereby ensuring the safety of the sawing operation and reducing the vibrations transmitted to the locking wrench 500, so that the locking wrench 500 will not jump and make noises. In at least one embodiment, the elastic ring 440 can be an O-ring.

[0037] like Figure 1 and Figure 2 As shown, the rotating end 110 of the adjustment bracket 100 may be provided with an adjustment arc-shaped through hole 111; Figure 5 As shown, the locking rod 200 may include: a rod body 210, combined with Figure 2 , one end of which is connected to a stopper cap 220, so that after the other end passes through the adjustment arc through hole 111 and the guide arc through hole 310, the stopper cap 220 abuts against the adjustment bracket 100, so that after the locking nut 410 and the locking rod 200 are bitten, the adjustment bracket 100 is fixed relative to the adjustment guide plate 300. Figure 5 As shown, a portion of the rod 210 located in the adjusting arc-shaped through hole 111 is provided with a stopper 230 to prevent the rod 210 from rotating when the locking nut 410 is tightened. Figure 2 As shown, the rotating end 110 of the adjusting bracket 100 is fitted with the adjusting guide plate 300 so that the rotating end 110 is fixed on the adjusting guide plate 300 after the locking nut 410 and the locking rod 200 are bitten.

[0038] To sum up, by setting the guide arc through hole 310, the locking wrench mechanism can make the locking rod 200 on the adjustment bracket 100 pass through the guide arc through hole 310, and the locking sleeve 400 can be set at the end of the locking rod 200 that passes through the guide arc through hole 310, and the locking sleeve 400 can be pre-set with the locking rod 200, so that when the locking wrench 500 drives the locking sleeve 400 to rotate relative to the locking rod 200 and close to the adjustment guide plate 300, so that the adjustment bracket 100 is fixed relative to the adjustment guide plate 300, the locking wrench 500 just abuts against the limit plate 600, so that under the premise of ensuring the locking of the adjustment bracket 100, the effective life of the locking mechanism will not be damaged by over-tightening, so that the service life of the locking wrench mechanism is greatly extended.

[0039] In the embodiments provided in this application, it should be understood that the disclosed systems and devices can be implemented in other ways. The embodiments described above are only exemplary. For example, the division of the mechanism is only a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed.

[0040] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0041] Based on the above ideal embodiments of the utility model, through the above description, relevant technicians can make various changes and modifications without departing from the technical concept of the utility model. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A locking wrench mechanism, characterized in that: include: A rotatably arranged adjustment bracket (100), wherein a locking rod (200) is provided at a rotating end (110); An adjustment guide plate (300) is arranged on one side of the rotating end (110) and is provided with a guide arc-shaped through hole (310) adapted to the locking rod (200); A locking sleeve (400) is provided at one end of the locking rod (200) passing through the guide arc-shaped through hole (310), and the locking sleeve (400) is connected to a locking wrench (500); A limit plate (600) is arranged in the locking direction of the locking wrench (500) so as to abut against the locking wrench (500) when the locking wrench (500) drives the locking sleeve (400) to rotate relative to the locking rod (200) and to be close to the adjustment guide plate (300), so that the adjustment bracket (100) is fixed relative to the adjustment guide plate (300).

2. The locking wrench mechanism according to claim 1, characterized in that: The contact portion (610) between the limiting plate (600) and the locking wrench (500) is located on the perpendicular midline of the line connecting the midpoints of the two bottom sides of the guide arc-shaped through hole (310).

3. The locking wrench mechanism according to claim 1, characterized in that: The locking sleeve (400) comprises: A locking nut (410) threadably engaged with one end of the locking rod (200) passing through the guide arc-shaped through hole (310); The locking wrench (500) is provided with a wrench hole (510) adapted to the locking nut (410) so as to be sleeved on the locking nut (410).

4. The locking wrench mechanism according to claim 3, characterized in that: The inner wall of the wrench hole (510) is in contact with the outer wall of the locking nut (410) so as to immediately drive the locking nut (410) when the locking wrench (500) is rotated in the locking direction.

5. The locking wrench mechanism according to claim 3, characterized in that: The locking nut (410) is a slotted nut, and an open retaining ring (420) is provided in the slot thereof to axially limit the locking wrench (500) sleeved on the locking nut (410).

6. The locking wrench mechanism according to claim 3, characterized in that: A washer (430) is provided between the locking nut (410) and the adjusting guide plate (300); An elastic ring (440) is provided between the washer (430) and the locking nut (410).

7. The locking wrench mechanism according to claim 1, characterized in that: The rotating end (110) of the adjusting bracket (100) is provided with an adjusting arc-shaped through hole (111); The locking rod (200) comprises: The rod body (210) has a stopper cap (220) connected to one end thereof, so that after the other end passes through the adjustment arc through hole (111) and the guide arc through hole (310), the stopper cap (220) abuts against the adjustment bracket (100); A section of the rod body (210) located in the adjusting arc-shaped through hole (111) is provided with a limiting block (230).

8. The locking wrench mechanism according to claim 7, characterized in that: The rotating end (110) of the adjustment bracket (100) is in contact with the adjustment guide plate (300).

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