Drawing device for automobile maintenance

Abstract

The utility model discloses an automobile maintenance puller which comprises a bottom plate, a threaded rod penetrating through the bottom plate in a threaded mode, a pair of rotating arms arranged in a symmetrical state relative to the threaded rod and rotationally connected with the bottom plate, and a control mechanism assembled on the pair of rotating arms and used for enabling the ends, away from the bottom plate, of the pair of rotating arms to be close to each other. The end, away from the rotating arm, of the threaded rod is provided with a rotating handle, the end, away from the bottom plate, of the rotating arm is fixedly connected with an installation sleeve, the length direction of the installation sleeve is perpendicular to the length direction of the rotating arm, and a limiting clamping arm capable of making contact with an inner ring of the bearing is detachably inserted into each installation sleeve. The limiting clamping arms make contact with the inner ring of the bearing, the maximum distance between the pair of rotating arms is limited through the control mechanism, the problem that the limiting clamping arms are separated from the bearing in the dismounting process is solved, the limiting clamping arms do not need to be supported, the threaded rod can be directly rotated, and use is easy and convenient.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of automobile maintenance, in particular to a kind of automobile maintenance puller. BACKGROUND

[0002] The bearing puller is used to detach the bearing from the shaft or the seat hole, and the structure of the bearing puller usually includes a puller body and a set of pull hooks. The pull hooks are a set of specially designed hook-shaped tools used to hook the bearing so as to pull the bearing out of the shaft or the seat hole.

[0003] The patent document with Chinese application number CN202420266813.4, "bearing puller", discloses a bearing puller, which includes a screw rod, a bracket, a plurality of pull rods, and a plurality of pull hooks. Each of the pull hooks is connected to one of the pull rods correspondingly. The pull hooks have a second preset size in the radial direction of the screw rod. The pull rods and the pull hooks form an included angle. The pull hooks can move in the radial direction of the screw rod relative to the pull rods connected thereto. The bearing can be detached easily, and the bearing outer ring can be protected from damage.

[0004] However, the above-mentioned patent still has the following disadvantages. Before the end of the screw rod on the puller abuts against the end of the shaft, the pull hooks on the plurality of pull rods are separated from the bearing. The plurality of pull rods need to be controlled manually so that each pull hook contacts the inner ring of the bearing. The screw rod also needs to be rotated while the pull rods are controlled, which increases the difficulty of using the puller and is inconvenient for inexperienced or low-experienced users to use, thereby affecting the work efficiency of bearing disassembly. Therefore, it is necessary to design a puller for automobile maintenance. UTILITY MODEL CONTENTS

[0005] In view of the above technical problems, the purpose of the utility model is to overcome the inconvenience in the process of hooking the bearing when the puller is used in the prior art.

[0006] In order to achieve the above-mentioned purpose, the utility model provides a puller for automobile maintenance, which includes a bottom plate, a threaded rod penetrating the bottom plate in a threaded manner, a pair of rotating arms arranged in a symmetrical state about the threaded rod and rotatingly connected to the bottom plate, and a control mechanism assembled on the pair of rotating arms for making the end portions of the pair of rotating arms away from the bottom plate approach each other.

[0007] The end portion of the threaded rod away from the rotating arm is provided with a handle. The end portion of the rotating arm away from the bottom plate is fixedly connected with a mounting sleeve whose length direction is perpendicular to the length direction of the rotating arm. A limiting clamping arm capable of contacting the inner ring of the bearing is detachably inserted on each mounting sleeve.

[0008] Preferably, a first insertion hole is formed through the mounting sleeve, a second insertion hole opposite to the first insertion hole is formed through the limiting arm, and an elastic pin is inserted into the first insertion hole and passes through the second insertion hole.

[0009] Preferably, the rotating arm is rotatably connected to the bottom plate through a first hinge shaft, the control mechanism comprises at least one mounting seat arranged on one of the rotating arms and at least one positioning seat corresponding to the mounting seat and arranged on the other rotating arm, the mounting seat is connected with a connecting arm through a second hinge shaft parallel to the first hinge shaft, the end of the connecting arm away from the mounting seat is provided with a first threaded seat, an end of a limiting bolt abutting against the positioning seat is threadedly connected to the first threaded seat, the limiting bolt is arranged in parallel with the connecting arm, and a sleeve part into which the end of the limiting bolt is inserted is fixedly arranged on the positioning seat.

[0010] Preferably, a second threaded seat matched with the threaded rod is arranged on the mounting seat, and an auxiliary nut is arranged on the threaded rod and located between the second threaded seat and the rotating handle.

[0011] Preferably, an arc-shaped notch with the same diameter as the inner ring of the bearing is arranged in the end of the limiting arm.

[0012] Preferably, an anti-skid groove is arranged on the side of the limiting arm in contact with the bearing.

[0013] Preferably, the end of the threaded rod away from the rotating handle is conical.

[0014] According to the technical scheme, the automobile maintenance puller has the following beneficial effects in use:

[0015] When the bearing needs to be disassembled, the limiting arm is in contact with the inner ring of the bearing, and the maximum distance between the pair of rotating arms is limited by the control mechanism, so that the limiting arm and the bearing are not separated during the disassembly process, the limiting arm does not need to be supported, and the threaded rod can be directly rotated, so that the automobile maintenance puller is simple and convenient to use.

[0016] Other features and advantages of the present application will be described in detail in the following specific embodiments; and the parts not involved in the present application are the same as or can be realized by the prior art. BRIEF DESCRIPTION OF DRAWINGS

[0017] The drawings are used to provide a further understanding of the present application, and constitute a part of the specification, and are used to explain the present application together with the following specific embodiments, but do not constitute a limitation on the present application. In the drawings:

[0018] Fig. 1 is a use schematic view of the automobile maintenance puller provided by the present application.

[0019] Fig. 2 is a kind of automobile maintenance puller's three-dimensional structure schematic view provided by the utility model;

[0020] Fig. 3 is a kind of automobile maintenance puller's control mechanism's three-dimensional structure schematic view provided by the utility model.

[0021] Reference signs

[0022] 1, bottom plate;2, threaded rod;3, swing arm;4, handle;5, mounting sleeve;6, limit arm;7, elastic bolt;8, first hinged shaft;9, mounting base;10, positioning seat;11, connecting arm;12, first threaded seat;13, limit bolt;14, pipe sleeve;15, second threaded seat;16, auxiliary nut;17, anti-skid groove. Specific embodiments

[0023] The specific embodiments described herein are intended to be illustrative only and are not intended to limit the present application.

[0024] In the present application, unless otherwise stated, the orientation words contained in the terms such as "up, down, in and out" only represent the orientation of the terms in the conventional use state, or the common name understood by those skilled in the art, and should not be regarded as a limitation of the terms.

[0025] As Figs. 1-3 shown, a kind of automobile maintenance puller, comprising: bottom plate, threaded rod of threaded through bottom plate, a pair of about symmetric state setting and being rotatedly connected with bottom plate and being assembled on a pair of swing arm 3 for making a pair of swing arm end away from bottom plate each other close control mechanism;

[0026] The end of the threaded rod away from the swing arm is provided with a handle, and the end of the swing arm away from the bottom plate is fixedly connected with a mounting sleeve whose length direction is perpendicular to the length direction of the swing arm, and a limit arm that can contact with the inner ring of the bearing is detachably inserted on each mounting sleeve.

[0027] When the bearing needs to be disassembled, the limit arm is in contact with the inner ring of the bearing, and the maximum distance between the pair of swing arms is limited by the control mechanism, so that the limit arm is always in contact with the inner ring of the bearing, and there is no problem of separation between the limit arm and the bearing during disassembly. When the handle is rotated to drive the threaded rod to rotate, the threaded rod is continued to be rotated after the end of the threaded rod is in contact with the end of the shaft, so that the bearing can be disassembled from the shaft.

[0028] When the bearing on the shaft of different specifications needs to be disassembled, the limiting arm can be replaced according to the actual use requirement, so that the replaced limiting arm can contact the inner ring of the corresponding bearing.

[0029] The first insertion hole is provided through the mounting sleeve, the second insertion hole is provided through the limiting arm and opposite to the first insertion hole, and the elastic plug is inserted and pulled out in the first insertion hole and through the second insertion hole.

[0030] When the limiting arm needs to be disassembled, the elastic plug is pulled out to pull out the limiting arm from the mounting sleeve, and then another limiting arm is inserted into the mounting sleeve, and the limiting arm is fixed in the mounting sleeve through the elastic plug, so that the replacement of the limiting arm is simple and convenient.

[0031] Because the direction of the force between the limiting arm and the inner ring of the bearing is parallel to the length direction of the threaded rod, the angle between the rotating arm and the threaded rod is less than 10 degrees in the process of disassembling the bearing, the elastic plug is not subjected to transverse shear force or small shear force, so the elastic plug is not damaged.

[0032] The rotating arm is rotatably connected to the bottom plate through a first hinged shaft, the control mechanism comprises at least one mounting seat assembled on one of the rotating arms and at least one positioning seat corresponding to the mounting seat and assembled on the other rotating arm, the mounting seat is connected with a connecting arm through a second hinged shaft parallel to the first hinged shaft, the end of the connecting arm away from the mounting seat is provided with a first threaded seat, the end of a limiting bolt positioned on the side away from the mounting seat is threadedly connected to the first threaded seat, the limiting bolt is arranged in parallel with the connecting arm, and a sleeve part for inserting the end of the limiting bolt is fixedly arranged on the positioning seat.

[0033] After a pair of limiting arms contact the bearing, the connecting arm is rotated so that the limiting bolt is opposite to the sleeve part, and then the limiting bolt is rotated to be inserted into the sleeve part, so that the pair of rotating arms cannot rotate away from each other, and the limiting arms remain in contact with the bearing.

[0034] The mounting seat is provided with a second threaded seat matched with the threaded rod, and the threaded rod is provided with an auxiliary nut located between the second threaded seat and the rotating handle.

[0035] During disassembly of the bearing, if the rotating handle is difficult to rotate, the auxiliary nut can also be rotated, and after the auxiliary nut contacts the second threaded seat, the auxiliary nut is continuously rotated by using a wrench tool.

[0036] The end of the limiting arm is recessed to form an arc-shaped notch with the same diameter as the inner ring of the bearing.

[0037] The arc-shaped notch can avoid the shaft, so that the limiting clamping arm can increase the contact area with the bearing inner ring, and is beneficial to disassembly of the bearing.

[0038] The limiting clamping arm is provided with an anti-skid groove on the side in contact with the bearing.

[0039] The end of the threaded rod away from the handle is conical.

[0040] The preferred embodiments of the present application are described in detail above with reference to the drawings, but the present application is not limited to the specific details in the above-described embodiments, and various simple modifications can be made to the technical solutions of the present application within the technical concept of the present application, and these simple modifications all belong to the protection scope of the present application.

[0041] In addition, it should be noted that each specific technical feature described in the above specific embodiments can be combined in any appropriate manner without contradiction, and in order to avoid unnecessary repetition, the present application will not further describe various possible combination manners.

[0042] Furthermore, various different embodiments of the present application can also be combined in any manner, as long as they do not deviate from the technical concept of the present application, and they should also be considered as disclosed content of the present application.

Claims

1. A car repair puller, characterized in that, include: The base plate (1), the threaded rod (2) passing through the base plate (1), a pair of rotating arms (3) arranged symmetrically about the threaded rod (2) and rotatably connected to the base plate (1), and a control mechanism mounted on the pair of rotating arms (3) for bringing the ends of the pair of rotating arms (3) away from the base plate (1) closer to each other. The threaded rod (2) is provided with a handle (4) at the end away from the rotating arm (3). The end of the rotating arm (3) away from the base plate (1) is fixedly connected with a mounting sleeve (5) whose length direction is perpendicular to the length direction of the rotating arm (3). Each mounting sleeve (5) can be detachably inserted with a limiting arm (6) that can contact the inner ring of the bearing.

2. The automotive repair puller according to claim 1, characterized in that, The mounting sleeve (5) has a first insertion hole through it, and the limiting arm (6) has a second insertion hole through it opposite to the first insertion hole. An elastic pin (7) that passes through the second insertion hole is inserted into the first insertion hole.

3. The automotive repair puller according to claim 1, characterized in that, The rotating arm (3) is rotatably connected to the base plate (1) via a first hinge shaft (8). The control mechanism includes at least one mounting seat (9) mounted on one of the rotating arms (3) and at least one positioning seat (10) corresponding to the mounting seat (9) and mounted on the other rotating arm (3). The mounting seat (9) is connected to a connecting arm (11) via a second hinge shaft parallel to the first hinge shaft (8). The end of the connecting arm (11) away from the mounting seat (9) is equipped with a first threaded seat (12). The first threaded seat (12) is threadedly connected with a limiting bolt (13) whose end can abut against a side located away from the mounting seat (9). The limiting bolt (13) is arranged parallel to the connecting arm (11). The positioning seat (10) is fixedly provided with a sleeve (14) for the end of the limiting bolt (13) to be inserted.

4. The automotive repair puller according to claim 3, characterized in that, The mounting base (9) is equipped with a second threaded seat (15) that matches the threaded rod (2), and the threaded rod (2) is fitted with an auxiliary nut (16) located between the second threaded seat (15) and the throttle (4).

5. The automotive repair puller according to claim 1, characterized in that, The end of the limiting arm (6) is recessed with an arc-shaped notch with the same diameter as the inner ring of the bearing.

6. The automotive repair puller according to claim 1, characterized in that, The limiting arm (6) has an anti-slip groove (17) on the side that contacts the bearing.

7. The automotive repair puller according to claim 1, characterized in that, The end of the threaded rod (2) away from the throttle (4) is conical.

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