Pull-out tool for large end of connecting rod

Abstract

The utility model discloses a pull-out tool for a large end of a connecting rod. The pull-out tool for the large end of the connecting rod is composed of a handle assembly, an upper flexible supporting part and a lower flexible supporting part. The handle assembly is used for clamping the connecting rod big end, the upper flexible supporting part and the lower flexible supporting part are used for guiding and protecting a cylinder barrel when the connecting rod big end is pulled out, the cylinder-entering fixing tool for rapidly disassembling and assembling the connecting rod big end is achieved, and working efficiency is improved. Furthermore, the handle assembly expands a positioning pin and a hook through a spring to hook the large end of the connecting rod, and the flexible supporting part can protect the cylinder barrel through an elastically bendable belt when the large end of the connecting rod is pulled out. The pull-out tool can be installed on the connecting rod big end in advance before the connecting rod big end enters a cylinder, the connecting rod big end is directly installed in a cylinder barrel when entering the cylinder, manual assisting installation on the other side is not needed, and labor cost is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of connecting rod big end entering cylinder body, in particular to a connecting rod big end pulling out tool. Background Art

[0002] The connecting rod is a relatively slender non-circular rod with a variable cross-section. The cross-section of the rod body gradually decreases from the big end to the small end to adapt to the rapidly changing dynamic loads it bears during work. It consists of three parts: the big end of the connecting rod, the rod body and the small end of the connecting rod. The big end of the connecting rod is separated, half of which is integrated with the rod body, and the other half is the connecting rod cover. The connecting rod cover is assembled with the crankshaft main journal with bolts and nuts. In the assembly process of gasoline and diesel engines, there is an auxiliary guiding process for pulling the big end of the connecting rod into the cylinder body, which involves the fixing and pulling out of the big end of the connecting rod. The existing technology is to fix the big end of the connecting rod by extending a fixing tool on the other side of the cylinder barrel to clamp the big end of the connecting rod, and then manually grab the fixing tool to manually pull out the big end of the connecting rod. In this way, it is easy to scratch the cylinder barrel during the pulling process; and when installing the fixing tool, it is necessary to manually operate and guide on the other side of the cylinder body, which is inconvenient, time-consuming and inefficient, and easily affects the assembly work of subsequent processes. Utility Model Content

[0003] The technical problem to be solved by the utility model is that the prior art fixing tool for the connecting rod big end into the cylinder is troublesome and time-consuming to disassemble and assemble, and the cylinder barrel is easily scratched when the connecting rod big end is pulled out, which easily affects the assembly operation of the subsequent process. A connecting rod big end pulling tool is provided.

[0004] The utility model solves the above technical problems through the following technical solutions:

[0005] The utility model provides a connecting rod big end pulling tool. The pulling tool comprises: a handle component, an upper flexible support part and a lower flexible support part;

[0006] The upper flexible support portion is mounted on the upper side of the handle assembly;

[0007] The lower flexible support portion is mounted on the lower side of the handle assembly;

[0008] The upper flexible support portion and the lower flexible support portion are mounted on the same end of the handle assembly;

[0009] The handle assembly is used for clamping the big end of the connecting rod.

[0010] Preferably, the handle assembly includes a fixing seat, a positioning pin, and a pin shaft;

[0011] The positioning pin is installed on the fixing seat through the pin shaft, and the pin shaft horizontally passes through the positioning pin and is installed on the fixing seat;

[0012] The upper flexible support portion is installed on the upper side of the fixing seat, and the lower flexible support portion is installed on the lower side.

[0013] Preferably, the handle assembly further comprises a limiting shaft, wherein the limiting shaft is horizontally mounted on the fixing seat and the limiting shaft is located below the positioning pin.

[0014] Preferably, a compression spring is installed on the inner side of the positioning pin, one end of the compression spring is fixed on the inner side of the positioning pin, and the other end is installed on the end of the fixing seat.

[0015] Preferably, the upper flexible support portion comprises a drawstring belt and a first fixing plate;

[0016] One end of the drawstring belt is mounted on the upper side of the fixing seat through the first fixing plate, and the other end is in a free state.

[0017] Preferably, the lower flexible support portion comprises a wear-resistant belt and a second fixing plate;

[0018] One end of the wear-resistant belt is fixed to the lower side of the fixing seat through the second fixing plate, and the other end is in a free state.

[0019] The positive progressive effect of the utility model is that the connecting rod big end pulling tool provided by the utility model is composed of a handle assembly and two upper and lower flexible support parts; the handle assembly is used to clamp the connecting rod big end, and the upper and lower flexible support parts are used to guide and protect the cylinder barrel when the connecting rod big end is pulled out, which realizes the rapid disassembly and assembly of the connecting rod big end cylinder fixing tool and improves work efficiency. Furthermore, the handle assembly opens the positioning pin and the hook through the spring to hook the connecting rod big end, and the flexible support part can protect the cylinder barrel when pulling out the connecting rod big end through an elastically bendable belt. The pulling tool of the utility model can be pre-installed on the connecting rod big end before the connecting rod big end enters the cylinder, and the connecting rod big end can be directly installed into the cylinder barrel when entering the cylinder, without the need for manual assistance on the other side for installation, saving labor costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic structural diagram of a connecting rod big end pulling tool according to an embodiment of the utility model.

[0021] Figure 2 The figure is a detailed structural diagram of a connecting rod big end pulling tool according to an embodiment of the utility model.

[0022] Figure 3 It is a plan view of a pulling tool for the connecting rod big end according to an embodiment of the utility model.

[0023] Figure 4 This is a detailed schematic diagram of the positioning pin part of an embodiment of the utility model.

[0024] Figure 5It is a schematic structural diagram of a pulling tool connected to a connecting rod big end according to an embodiment of the utility model.

[0025] Legend: 1. Handle assembly; 2. Upper flexible support; 3. Lower flexible support; 4. Fixed seat; 5. Locating pin; 6. Pin shaft; 7. Limiting shaft; 8. Compression spring; 9. Pull belt; 10. First fixed plate; 11. Wear-resistant belt; 12. Second fixed plate; 13. Big end of connecting rod; 14. Hook. DETAILED DESCRIPTION

[0026] The present invention is further described below by way of embodiments, but the present invention is not limited to the scope of the embodiments.

[0027] Example 1

[0028] like Figure 1-3 As shown, this embodiment provides a connecting rod big end pulling tool. The pulling tool comprises: a handle assembly 1, an upper flexible support portion 2 and a lower flexible support portion 3; the upper flexible support portion 2 is mounted on the upper side of the handle assembly 1; the lower flexible support portion 3 is mounted on the lower side of the handle assembly 1; the upper flexible support portion 2 and the lower flexible support portion 3 are mounted on the same end of the handle assembly 1; the handle assembly 1 is used to clamp the connecting rod big end 13.

[0029] like Figure 2 As shown, in this embodiment, the handle assembly 1 includes a fixed seat 4, a positioning pin 5, and a pin shaft 6; the positioning pin 5 is installed on the fixed seat 4 through the pin shaft 6, and the pin shaft 6 passes horizontally through the positioning pin 5 and is installed on the fixed seat 4; the upper side of the fixed seat 4 is installed with an upper flexible support portion 2, and the lower side is installed with a lower flexible support portion 3. Specifically, the upper and lower sides of one end of the fixed seat 4 are respectively fixed with the upper and lower flexible support portions 2 and the lower flexible support portion 3, and the other end is in a "slide" shape for installing the positioning pin 5; the left end of the positioning pin 5 is installed on the pin shaft 6, which can rotate up and down with the pin shaft 6, and the right end is conical, which is used to be clamped into the connecting rod big head 13 to clamp and fix it tightly; the end of the fixed seat 4 is also provided with an upward hook 14, which is used to hook the connecting rod big head 13 after the positioning pin 5 is lifted upward to ensure the stability of the fixing of the connecting rod big head 13.

[0030] like Figure 2 As shown, in this embodiment, the handle assembly 1 further comprises a limiting shaft 7, which is horizontally mounted on the fixing seat 4 and is located below the positioning pin 5. Specifically, the limiting shaft 7 is used to limit the angle range of the positioning pin 5 to rotate downward.

[0031] like Figure 2As shown, in this embodiment, the upper flexible support part 2 includes a drawstring belt 9 and a first fixing plate 10; one end of the drawstring belt 9 is mounted on the upper side of the fixing seat 4 through the first fixing plate 10, and the other end is in a free state. Specifically, the first fixing plate 10 presses one end of the drawstring belt 9 onto the upper surface of the end of the fixing seat 4 away from the positioning pin 5, and fixes it by bolts; the other end of the drawstring belt 9 is in a free state and extends to the left; wherein, the drawstring belt 9 of this embodiment is elastically bendable, and is used for guiding when manually pulling out the connecting rod big end 13, and has good ductility, and is not easy to be broken, resulting in damage to the connecting rod big end 13 and affecting subsequent process steps.

[0032] like Figure 2 As shown, in this embodiment, the lower flexible support portion 3 includes a wear-resistant belt 11 and a second fixing plate 12; one end of the wear-resistant belt 11 is fixed to the lower side of the fixing seat 4 through the second fixing plate 12, and the other end is in a free state. Specifically, the second fixing plate 12 presses one end of the wear-resistant belt 11 on the lower surface of the end of the fixing seat 4 away from the positioning pin 5, and is fixed by bolts; the other end of the wear-resistant belt 11 is placed in a free state below the handle assembly 1 and extends to the right; wherein, the wear-resistant belt 11 of this embodiment is elastically bendable, and is used to protect the connecting rod big end 13 and the cylinder body when the connecting rod big end 13 is manually pulled out, and has good ductility, which can protect the cylinder body from wear and tear and protect the fixing seat 4, thereby improving the durability of the pulling tool.

[0033] like Figure 4 As shown, in this embodiment, a compression spring 8 is installed inside the positioning pin 5, one end of the compression spring 8 is fixed inside the positioning pin 5, and the other end is installed at the end of the fixing seat 4. Specifically, one end of the compression spring 8 is embedded in the positioning pin 5, and the other end is embedded in the fixing seat 4 along the installation direction of the positioning pin 5. The compression spring 8 is used to expand the positioning pin 5 and the fixing seat 4, that is, the compression spring 8 can drive the positioning pin 5 to lift up around the pin shaft 6 and leave the fixing seat 4, so that the positioning pin 5 can clamp the connecting rod big head 13, and the positioning pin 5 is released after the connecting rod big head 13 is clamped, and it returns to its original position under the action of the compression spring 8, thereby achieving the purpose of clamping the connecting rod big head 13.

[0034] The present embodiment provides a connecting rod big end pulling tool. The connecting rod big end pulling tool consists of a handle assembly and two upper and lower flexible support parts; the handle assembly is used to clamp the connecting rod big end, and the upper and lower flexible support parts are used to guide and protect the cylinder barrel when the connecting rod big end is pulled out, which realizes the rapid disassembly and assembly of the connecting rod big end cylinder fixing tool and improves work efficiency. Furthermore, the handle assembly opens the positioning pin and the hook through a spring to hook the connecting rod big end, and the flexible support part can protect the cylinder barrel when pulling out the connecting rod big end through an elastically bendable belt. The pulling tool of the utility model can be pre-installed on the connecting rod big end before the connecting rod big end enters the cylinder, and the connecting rod big end can be directly installed into the cylinder barrel when entering the cylinder, without the need for manual assistance in installation on the other side, saving labor costs.

[0035] The working principle of the utility model is: the positioning pin 5 is lifted upward, and a gap is generated between the positioning pin 5 and the fixing seat 4 under the action of the compression spring 8, and the connecting rod big head 13 is placed in the gap, and the tapered end of the positioning pin 5 and the hook 14 at the end of the fixing seat 4 are inserted into the connecting rod big head 13, and the positioning pin 5 is released, and restored to its original position under the action of the compression spring 8, and the pulling tool and the connecting rod big head 13 can be fixed. In this way, the pulling tool can be fixedly installed on the connecting rod big head 13 in advance, and the connecting rod big head 13 is directly installed into the cylinder barrel when entering the cylinder, and no manual assistance is required on the other side during installation, which is convenient for disassembly and assembly, and can be operated across processes. When pulling out the connecting rod big head, it can be guided by the pull belt 9, and the wear-resistant belt 12 can also be used to avoid scratches on the cylinder barrel and wear of the connecting rod big head 13 to affect subsequent process steps. The pulling tool of the utility model is small in size, saves space, is easy to operate, and is particularly suitable for use in narrow gap spaces.

[0036] Although the specific implementations of the utility model are described above, those skilled in the art should understand that this is only an example, and the protection scope of the utility model is defined by the attached claims. Those skilled in the art can make various changes or modifications to these implementations without departing from the principle and essence of the utility model, but these changes and modifications fall within the protection scope of the utility model.

Claims

1. A connecting rod big end pulling tool, characterized in that: The pulling tool comprises: a handle assembly, an upper flexible support portion and a lower flexible support portion; The upper flexible support portion is mounted on the upper side of the handle assembly; The lower flexible support portion is mounted on the lower side of the handle assembly; The upper flexible support portion and the lower flexible support portion are mounted on the same end of the handle assembly; The handle assembly is used for clamping the big end of the connecting rod.

2. The connecting rod big end pulling tool according to claim 1, characterized in that: The handle assembly includes a fixing seat, a positioning pin, and a pin shaft; The positioning pin is installed on the fixing seat through the pin shaft, and the pin shaft horizontally passes through the positioning pin and is installed on the fixing seat; The upper flexible support portion is installed on the upper side of the fixing seat, and the lower flexible support portion is installed on the lower side.

3. The connecting rod big end pulling tool according to claim 2, characterized in that: The handle assembly also includes a limiting shaft, which is horizontally mounted on the fixing seat and is located below the positioning pin.

4. The connecting rod big end pulling tool according to claim 3, characterized in that: A compression spring is installed on the inner side of the positioning pin, one end of the compression spring is fixed on the inner side of the positioning pin, and the other end is installed on the end of the fixing seat.

5. The connecting rod big end pulling tool according to claim 2, characterized in that: The upper flexible support portion includes a drawstring belt and a first fixing plate; One end of the drawstring belt is mounted on the upper side of the fixing seat through the first fixing plate, and the other end is in a free state.

6. The connecting rod big end pulling tool according to claim 2, characterized in that: The lower flexible support portion includes a wear-resistant belt and a second fixing plate; One end of the wear-resistant belt is fixed to the lower side of the fixing seat through the second fixing plate, and the other end is in a free state.

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