Device for preventing nut from rotating during bolt fastening

Abstract

The utility model discloses a device for preventing a nut from rotating during bolt fastening, and belongs to the technical field of automobile integral tools. The device mainly comprises a connecting rod, a first connecting column, a second connecting column and a counter-force assembly, the first connecting column is installed at one end of the connecting rod, the second connecting column is installed at the other end of the connecting rod, and a movably-connected sleeve is installed at one end of the second connecting column; one end of the counter-force assembly is embedded into the second connecting column in a rotating mode. According to the utility model, a counterforce fulcrum can be provided for fastening the bolt or the nut, so that the bolt or the nut is prevented from rotating along with the bolt or the nut on the other side. Meanwhile, through the counter-force sleeve with the force unloading groove, the device can be easily taken out without damaging the original fixed torque after the bolt or the nut reaches the fixed torque, so that not only is the working efficiency improved, but also the damage to a human body is avoided. The bolt fastening device is mainly used for fastening bolts of the whole automobile.

Description

Technical Field

[0001] The utility model belongs to the technical field of automobile assembly tools, and in particular relates to a nut anti-rotation device when a bolt is tightened. Background Art

[0002] During the final assembly of automobiles, when tightening bolts on structural parts with bolts and nuts, no matter which end is rotated and tightened, the bolt / nut on the other end will rotate along with it. Conventionally, an ordinary socket wrench is placed on the rotating bolt / nut, and the far end of the wrench is manually gripped or blocked at a fixed point for return force. However, conventional manual hand-held wrenches are no longer sufficient and cannot be held, and manual operation can easily cause human injury; if the wrench / socket is blocked at a fixed point on the car body, but as the torque increases to the maximum during the tightening process, the contact point between the wrench and the car body also bears the maximum pressure during tightening, and the return force socket cannot be taken out after tightening, and needs to be shaken in the opposite direction to take it out, but at this time the torque originally borne by the bolt has been destroyed. Utility Model Content

[0003] The technical problem to be solved by the utility model is: to overcome the shortcomings of the prior art and provide a nut anti-rotation device when the bolt is tightened, which can provide a reaction force fulcrum for the tightening of the bolt or nut to prevent the bolt or nut from rotating with the bolt or nut on the other side. At the same time, through the reaction sleeve with a force unloading groove, after the bolt or nut reaches the fixed torque, the device can be easily removed without destroying the original fixed torque, which not only improves the work efficiency, but also avoids damage to the human body.

[0004] The device for preventing a nut from rotating when a bolt is tightened comprises: a connecting rod, a first connecting column, a second connecting column, and a reaction force assembly. The first connecting column is installed at one end of the connecting rod, and the second connecting column is installed at the other end, and a movably connected sleeve is installed at one end of the second connecting column; one end of the reaction force assembly is rotatably embedded in the second connecting column.

[0005] Preferably, the reaction force assembly includes a reaction force sleeve, an inner shaft, and a fixed bolt rod, and the reaction force sleeve defines a rotating through groove extending from one end to the other end; the inner shaft is embedded in the reaction force sleeve, and one end abuts against the second connecting column; the fixed bolt rod extends from one end of the inner shaft to the other end, and is fixedly connected to the second connecting column.

[0006] Preferably, a force unloading groove is provided on the side wall of the reaction sleeve.

[0007] Preferably, a rotating handle is also fixed on the outer wall of the reaction sleeve, located on the other side of the unloading groove.

[0008] Preferably, a limiting boss having the same diameter as the outer diameter of the reaction sleeve is provided at one end of the inner shaft away from the second connecting column.

[0009] Preferably, the first connecting column and the connecting rod are detachably connected, and a connecting screw is installed between the two.

[0010] Preferably, the second connecting column and the connecting rod are of a plug-in structure.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] 1. It can provide a reaction force fulcrum for the tightening of bolts or nuts to prevent the bolts or nuts from rotating with the bolts or nuts on the other side.

[0013] 2. Through the reaction sleeve with unloading groove, after the bolt or nut reaches the fixed torque, the device can be easily removed without destroying the original fixed torque, which not only improves work efficiency but also avoids damage to the human body. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is the front view of the utility model;

[0015] Figure 2 It is a schematic diagram of the assembly of the utility model;

[0016] Figure 3 This is a schematic diagram of the reaction sleeve structure of the utility model;

[0017] Figure 4 It is a schematic diagram of the fastening state of the utility model;

[0018] Figure 5 It is a schematic diagram of the unloading state of the utility model.

[0019] In the figure, 110, connecting rod; 120, first connecting column; 121, sleeve; 122, connecting bolt; 130, second connecting column; 200, reaction force assembly; 210, reaction force sleeve; 211, rotating through groove; 212, unloading groove; 213, rotating handle; 220, inner shaft; 221, fixing bolt rod. DETAILED DESCRIPTION

[0020] The utility model is further described below in conjunction with the accompanying drawings:

[0021] The directional nouns involved in the detailed description paragraphs are only for the convenience of those skilled in the art to understand the technical solutions described in this application according to the visual orientation shown in the accompanying drawings. Unless otherwise clearly specified and limited, the terms "setting", "installation", "connection", etc. should be understood in a broad sense. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0022] like Figures 1 to 3As shown, a nut anti-rotation device when a bolt is tightened includes: a connecting rod 110, a first connecting column 120, a second connecting column 130, and a reaction force assembly 200. The first connecting column 120 is installed at one end of the connecting rod 110, and the second connecting column 130 is installed at the other end, and a movably connected sleeve 121 is installed at one end of the second connecting column 130; one end of the reaction force assembly 200 is rotatably embedded in the second connecting column 130.

[0023] Optionally, a fixing marble is installed at the connection between the first connection column 120 and the sleeve 121. In this way, when the sleeve 121 is connected to the first connection column 120, it can be fixed by the fixing marble, so that the sleeve 121 and the first connection column 120 are not easily separated under the action of external force, so that the connection stability between the sleeve 121 and the first connection column 120 is improved.

[0024] like Figures 1 to 3 As shown, the reaction force assembly 200 includes a reaction force sleeve 210, an inner shaft 220, and a fixed bolt rod 221. The reaction force sleeve 210 defines a rotation through groove 211 extending from one end to the other end; the inner shaft 220 is embedded in the reaction force sleeve 210, and one end is in contact with the second connecting column 130; the fixed bolt rod 221 extends from one end of the inner shaft 220 to the other end, and is fixedly connected to the second connecting column 130. In this way, the reaction force sleeve 210 can rotate with the inner shaft 220 and the fixed bolt rod 221 as the axis. In addition, the inner shaft 220 can also provide internal support for the reaction force sleeve 210, so that the reaction force sleeve 210 is not easily deformed and damaged when subjected to external force, thereby increasing the service life of the reaction force sleeve 210.

[0025] like Figures 3 to 5 As shown, a force unloading groove 212 is provided on the side wall of the reaction sleeve 210. In this way, when tightening, the force unloading groove 212 avoids the reaction force bearing point, and provides a force bearing support position for tightening at other positions. When tightening is completed, the force unloading groove 212 is rotated to the original force bearing support position, so that the reaction sleeve 210 and the force bearing support position obtain a movable space through the force unloading groove 212, so that the reaction sleeve 210 can be easily removed without additional movement, thereby preventing the reaction sleeve 210 from destroying the torque required for tightening due to additional movement.

[0026] like Figures 3 to 5 As shown, a rotating handle 213 is also fixed on the outer wall of the reaction sleeve 210, which is located on the other side of the unloading groove 212. In this way, the reaction sleeve 210 can be easily rotated by rotating the handle 213 without the aid of other tools, which effectively improves the working efficiency of the reaction sleeve 210.

[0027] Optionally, the inner shaft 220 is provided with a limiting boss having the same outer diameter as the reaction sleeve 210 at one end away from the second connecting column 130. In this way, the limiting boss limits the reaction sleeve 210, so that the reaction sleeve 210 can maintain a stable position between the second connecting column 130 and the inner shaft 220, ensuring that it is not easy to separate from the second connecting column 130 and the inner shaft 220 under any circumstances.

[0028] Optionally, the first connecting column 120 is detachably connected to the connecting rod, and a connecting bolt 122 is installed between the two. In this way, through the detachable connection structure, the specifications of the first connecting column 120 can be flexibly changed according to actual needs, thereby improving the applicability of the first connecting column 120.

[0029] Optionally, the second connecting column 130 and the connecting rod 110 are in a plug-in structure. In this way, the direction of the second connecting column 130 can be quickly changed through the plug-in structure of the second connecting column 130 and the connecting rod 110, so that the device can be applied to different support positions, effectively improving the overall applicability of the device.

[0030] Finally, although this specification is described according to 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 nut anti-rotation device when a bolt is tightened, comprising: A connecting rod (110), a first connecting column (120), a second connecting column (130), and a reaction force assembly (200), characterized in that: one end of the connecting rod (110) is installed with the first connecting column (120), the other end is installed with the second connecting column (130), and one end of the second connecting column (130) is installed with a movably connected sleeve (121); one end of the reaction force assembly (200) is rotatably embedded in the second connecting column (130).

2. The nut anti-rotation device when bolts are tightened according to claim 1, characterized in that: The reaction force assembly (200) comprises a reaction force sleeve (210), an inner shaft (220), and a fixed bolt rod (221); a rotation through slot (211) extending from one end to the other end is defined in the reaction force sleeve (210); the inner shaft (220) is embedded in the reaction force sleeve (210), and one end of the inner shaft (220) is in contact with the second connecting column (130); the fixed bolt rod (221) extends from one end of the inner shaft (220) to the other end, and is fixedly connected to the second connecting column (130).

3. The nut anti-rotation device when bolts are tightened according to claim 2, characterized in that: A force unloading groove (212) is provided on the side wall of the reaction sleeve (210).

4. The device for preventing nut from rotating when bolts are tightened according to claim 3, characterized in that: A rotating handle (213) is also fixed on the outer wall of the reaction sleeve (210), and is located on the other side of the position of the force unloading groove (212).

5. The nut anti-rotation device when bolts are tightened according to claim 2, characterized in that: One end of the inner shaft (220) away from the second connecting column (130) is provided with a limiting boss having the same diameter as the outer diameter of the reaction sleeve (210).

6. The device for preventing nut from rotating when bolts are tightened according to claim 1, characterized in that: The first connecting column (120) is detachably connected to the connecting rod, and a connecting bolt (122) is installed between the two.

7. The device for preventing nut from rotating when bolts are tightened according to claim 1, characterized in that: The second connecting column (130) and the connecting rod (110) are of a plug-in structure.

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