Device for preventing sleeve from scratching connecting piece

Abstract

The utility model relates to the technical field of assembly process auxiliary tools, and particularly discloses a device for preventing a sleeve from scratching a connecting piece, which comprises a lower connecting bracket and a retainer, a plurality of side roller pins are axially mounted on the inner side of the upper part of the lower connecting bracket, the side roller pins are in contact with the outer wall of the sleeve, and the sleeve is inserted into the lower connecting bracket; the retainer is installed on the lower portion of the lower connecting support, a plurality of lower roller pins and upper roller pins are installed on the retainer, the upper roller pins make contact with the end face of the sleeve, and the lower roller pins make contact with the surface of the contact connecting piece; the upper roller pin and the lower roller pin are installed on the two faces of the retainer, so that the lower roller pin rolls on the surface of a connecting piece, friction damage is prevented, the effect of partial speed reduction can be achieved, the connecting piece is prevented from being scratched, the structure is simple, the design is reasonable, and in the screwing process, the connecting piece is prevented from being scratched. The surface of the connecting piece is prevented from being scratched and abraded due to the fact that the sleeve rotates at a high speed and makes direct contact with the connecting piece, the production takt requirement is met, working efficiency and working quality are improved, practicability is high, and popularization is easy.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of assembly process auxiliary tools, and particularly relates to a device for preventing a sleeve from scratching a connecting piece. BACKGROUND

[0002] A sleeve wrench is a commonly used tool in automobile maintenance and repair, and is mainly used for fastening or disassembling bolts and nuts. The sleeve wrench is widely used in automobile maintenance due to its high efficiency and accuracy.

[0003] In the process of assembling a vehicle, when a sleeve is tightened to assemble a bolt on a flange surface, the sleeve is rotated at high speed by a tightening wrench, and the edges of the sleeve and the surface of the connected piece are subjected to severe friction, which damages the surface treatment of the connected piece, reduces the corrosion and rust resistance of the connected piece, affects the product quality, and increases the product rework cost and sales cost. Therefore, a device for preventing a sleeve from scratching a connecting piece is needed to solve the problem of friction between the edges of the sleeve and the surface of the connected piece in the process of assembling a vehicle. SUMMARY

[0004] In view of the problems in the prior art, the purpose of the utility model is to provide a device for preventing a sleeve from scratching a connecting piece.

[0005] The utility model solves the technical problems by adopting the following technical scheme: a device for preventing a sleeve from scratching a connecting piece, comprising a lower connecting frame and a retaining frame, a plurality of side rollers are axially installed on the upper inner side of the lower connecting frame, the side rollers contact the outer wall of the sleeve, and the sleeve is inserted into the lower connecting frame.

[0006] The retaining frame is installed on the lower part of the lower connecting frame, a plurality of lower rollers and upper rollers are installed on the retaining frame, the upper rollers contact the end face of the sleeve, and the lower rollers contact the surface of the connecting piece.

[0007] Preferably, the side rollers are rollingly installed in roller grooves one on the upper inner side of the lower connecting frame, and the side rollers are arranged around the inner wall of the lower connecting frame.

[0008] Preferably, the upper part of the lower connecting frame is provided with internal threads, the lower connecting frame is connected to an upper connecting support through threads, and the lower connecting frame and the upper connecting support jointly maintain the position of the side rollers.

[0009] Preferably, the lower rollers are rollingly installed in roller grooves two on the side of the retaining frame facing the connecting piece, and the upper rollers are rollingly installed in roller grooves three on the side of the retaining frame facing the sleeve.

[0010] Preferably, the roller grooves two of the lower rollers and the roller grooves three of the upper rollers are not on the same horizontal plane, the sleeve contacts the upper rollers without directly contacting the lower rollers and the retaining frame, and the connecting piece contacts the lower rollers without directly contacting the upper rollers and the retaining frame.

[0011] Preferably, the holder is externally provided with external threads, the lower connecting frame is internally provided with internal threads, and the holder is connected to the lower internal side of the lower connecting frame through the threads.

[0012] The device has the following beneficial effects:

[0013] The device for preventing the sleeve from scratching the connecting piece is characterized in that the upper rolling pin and the lower rolling pin are installed on the two surfaces of the holder, the lower rolling pin rolls on the surface of the connecting piece, friction damage is prevented, and a partial speed reduction effect is achieved.

[0014] The device for preventing the sleeve from scratching the connecting piece has the advantages of simple structure, reasonable design, prevention of surface scratching and abrasion of the connecting piece caused by high-speed rotation of the sleeve and direct contact with the connecting piece during tightening, meeting the production rhythm requirement, improving work efficiency and work quality, high practicability, and easy popularization. BRIEF DESCRIPTION OF DRAWINGS

[0015] Fig. 1 is a structure schematic view of the device for preventing the sleeve from scratching the connecting piece in an installed state.

[0016] Fig. 2 is a structure schematic view of the device for preventing the sleeve from scratching the connecting piece.

[0017] Fig. 3 is a structure schematic view of the holder.

[0018] In the drawings: 1 - sleeve; 2 - upper connecting support; 3 - lower connecting frame; 4 - holder; 5 - lower rolling pin; 6 - upper rolling pin; 7 - side rolling pin. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the device will be further clearly and completely described in combination with the drawings of the embodiments of the device. Based on the embodiments of the device, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the device.

[0020] As shown in Figs. 1-3 A device for preventing the sleeve from scratching the connecting piece includes a sleeve 1, an upper connecting support 2, a lower connecting frame 3, a holder 4, a lower rolling pin 5, an upper rolling pin 6, and a side rolling pin 7. The lower connecting frame 3 is internally provided with a plurality of side rolling pins 7, which contact the outer wall of the sleeve 1. The sleeve 1 is inserted into the lower connecting frame 3.

[0021] The side rolling needle 7 is rollingly installed in the rolling needle groove one on the inner side upper portion of the lower connecting frame 3, and is arranged around the inner wall of the lower connecting frame 3.

[0022] The upper portion of the lower connecting frame 3 is provided with an internal thread, the lower connecting frame 3 is connected with the upper connecting support 2 through the thread, and the lower connecting frame 3 and the upper connecting support 2 jointly keep the position of the side rolling needle 7.

[0023] The retainer 4 is installed on the lower portion of the lower connecting frame 3, the outer portion of the retainer 4 is provided with an external thread, the lower portion of the lower connecting frame 3 is provided with an internal thread, and the retainer 4 is connected on the lower portion of the lower connecting frame 3 through the thread.

[0024] The retainer 4 is installed on the lower portion of the lower connecting frame 3, the outer portion of the retainer 4 is provided with an external thread, the lower portion of the lower connecting frame 3 is provided with an internal thread, and the retainer 4 is connected on the lower portion of the lower connecting frame 3 through the thread.

[0025] The lower rolling needle 5 is rollingly installed in the rolling needle groove two on the side of the retainer facing the connecting piece, and the upper rolling needle 6 is rollingly installed in the rolling needle groove three on the side of the retainer facing the sleeve 1.

[0026] The rolling needle groove two of the lower rolling needle 5 and the rolling needle groove three of the upper rolling needle 6 are not in the same horizontal plane, the sleeve 1 contacts the upper rolling needle 6 but does not directly contact the lower rolling needle 5 and the retainer 4, and the connecting piece contacts the lower rolling needle 5 but does not directly contact the upper rolling needle 6 and the retainer 4.

[0027] The working principle of the utility model is as follows:

[0028] The retainer 4 is provided with the rolling needle groove three of the upper rolling needle 6 and the rolling needle groove two of the lower rolling needle 5, the relative positions of the upper rolling needle 6 and the lower rolling needle 5 and the rolling needle are kept, the rolling needle groove three of the upper rolling needle 6 and the rolling needle groove two of the lower rolling needle 5 are not in the same horizontal plane, the sleeve 1 contacts the upper rolling needle 6 but cannot directly contact the lower rolling needle 5 and the retainer 4, and the connecting piece contacts the lower rolling needle 5 but cannot directly contact the upper rolling needle 6 and the retainer 4. When the upper rolling needle 6 rotates, the lower rolling needle 5 is static or rolls, when the lower rolling needle 5 rotates, the upper rolling needle 6 is static or rolls, and when the sleeve 1 rotates, the upper rolling needle 6 rotates relative to the retainer 4.

[0029] When assembling the bolted flange nut, the scratch-preventing device is sleeved outside the sleeve 1, the side of the sleeve 1 is in contact with the upper roller pin 6 and the side roller pin 7 of the scratch-preventing device, so that the sleeve 1 cannot directly contact the lower connecting frame 3, the upper connecting support 2 and the retaining frame 4, the lower roller pin 5 is in contact with the connecting piece, so that the retaining frame 4 cannot directly contact the connecting piece, the retaining frame 4 and the upper roller pin 6 and the side roller pin 7 jointly isolate the sleeve 1 from directly contacting the connecting piece, when the sleeve 1 is rotated at high speed by the tightening wrench to tighten the nut, the sleeve 1 rotates relative to the upper roller pin 6 and the side roller pin 7, the upper connecting support 2, the lower connecting frame 3 and the retaining frame 4 remain relatively static, so that the upper connecting support 2, the lower connecting frame 3 and the retaining frame 4 are relatively static relative to the connecting piece, and the nut tightening is prevented from scratching the connecting piece. The upper roller pin 6 and the lower roller pin 5 are installed on the two sides of the retaining frame 4, so that the lower roller pin 5 rolls on the surface of the connecting piece, the friction damage is prevented, and the partial speed reduction effect is achieved, the relative diameters of the upper roller pin 6 and the lower roller pin 5 of the retaining frame 4 are adjusted, different speed reduction effects are achieved, and the connecting piece is prevented from being scratched.

[0030] The utility model is not limited to the above-mentioned embodiment, anyone should know the structural change made under the inspiration of the utility model, any technical scheme with the same or similar technical scheme of the utility model falls into the protection scope of the utility model.

[0031] The technical, shape and structure parts not described in the utility model are well-known technologies.

Claims

1. A device for preventing a sleeve from galling a connector, comprising: The lower connecting frame has a plurality of side rollers installed on the upper inner side of the frame, which contact the outer wall of the sleeve inserted into the lower connecting frame. The retaining frame is installed on the lower part of the lower connecting frame, and a plurality of lower rollers and upper rollers are installed on the retaining frame, with the upper rollers contacting the end face of the sleeve and the lower rollers contacting the surface of the connecting member.

2. The device for preventing the sleeve from scratching the connector according to claim 1, wherein The side rollers are rollingly installed in the roller groove one on the upper inner side of the lower connecting frame, and the side rollers are arranged around the inner wall of the lower connecting frame.

3. The device for preventing the sleeve from scratching the connector according to claim 2, wherein The upper part of the lower connecting frame is provided with internal threads, and the lower connecting frame is connected to the upper connecting support through the threads, and the lower connecting frame and the upper connecting support jointly maintain the position of the side rollers.

4. The device for preventing the sleeve from scratching the connector according to claim 1, wherein The lower rollers are rollingly installed in the roller groove two on the side of the retaining frame facing the connecting member, and the upper rollers are rollingly installed in the roller groove three on the side of the retaining frame facing the sleeve.

5. The device for preventing the sleeve from scratching the connector according to claim 4, wherein The roller groove two of the lower rollers and the roller groove three of the upper rollers are not in the same horizontal plane, the sleeve contacts the upper rollers but does not directly contact the lower rollers and the retaining frame, and the connecting member contacts the lower rollers but does not directly contact the upper rollers and the retaining frame.

6. The device for preventing the sleeve from scratching the connector according to claim 1, wherein The retaining frame is provided with external threads, and the lower part of the lower connecting frame is provided with internal threads, and the retaining frame is connected to the lower part of the lower connecting frame through the threads.

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