CN212665975U

CN212665975U - Camshaft bolt tightening tool

Info

Publication number: CN212665975U
Application number: CN202021190963.XU
Authority: CN
Inventors: 吴远乐; 陈承材; 圣乔乔; 吴佳莉; 曾建中
Original assignee: Guangxi Yuchai Machinery Co Ltd
Current assignee: Guangxi Yuchai Machinery Co Ltd
Priority date: 2020-06-23
Filing date: 2020-06-23
Publication date: 2021-03-09
Anticipated expiration: 2030-06-23

Abstract

The utility model discloses a camshaft bolt tightening tool relates to assembly tool technical field, and it includes the gear body, the handle body, the gear body includes the intermediate part, the intermediate part is the cylinder, is provided with the sprocket on its outer wall, intermediate part both ends face is provided with cylindrical boss I, boss II respectively, boss I, boss II are coaxial with the intermediate part respectively, gear body axial is provided with the through-hole, be provided with the keyway on the inner wall of through-hole, a tip of the handle body is connected with boss I, the handle body other end is provided with the kink, and its direction of buckling is the intermediate part axis direction. The utility model has the characteristics of the selection of material is simple and easy, simple manufacture, easy operation, reliability height have improved installation efficiency etc.

Description

Camshaft bolt tightening tool

Technical Field

The utility model relates to an assembly fixture technical field, especially a camshaft bolt tightening tool.

Background

At present, all required parts are organically combined and assembled in the process of assembling the engine, and certain technological requirements are met. The camshaft plays an important role as an important part on the engine, and the assembly of the camshaft and the chain wheel is an important process in the assembly of the engine.

The models of all series are different, and the installation positions and the tightening requirements of the camshafts are different. The 4Y24 model crankshaft and camshaft are in chain drive, and a chain is connected with the crankshaft and camshaft. When the machine is actually installed, a chain, a camshaft main chain wheel and the like need to be assembled firstly, and then a camshaft bolt needs to be assembled and tightened. Because of bent axle and camshaft are for rotating the piece, and bent axle and camshaft are chain-driven and are connected, can take place the bolt and follow the commentaries on classics phenomenon when screwing up camshaft bolt, can't guarantee camshaft bolt moment, therefore lead to current 4Y24 camshaft bolt tightening frock mainly to have following shortcoming: the original camshaft bolt tightening assembly process is complex and high in requirement, the assembly labor intensity is high, two workers are required to operate, the assembly efficiency is low, the existing tightening assembly tool is large in structural parts, and the special tool manufacturing process is complex and high in cost.

SUMMERY OF THE UTILITY MODEL

Problem to prior art existence, the utility model provides a camshaft bolt screws up frock purpose is big in order to solve the intensity of labour who exists in the current camshaft bolt screws up, the inefficiency scheduling problem.

In order to achieve the purpose, the technical scheme of the utility model is as follows:

the utility model provides a camshaft bolt tightening frock, includes the gear body, the handle body, the gear body includes the intermediate part, the intermediate part is the cylinder, is provided with the sprocket on its outer wall, intermediate part both ends face is provided with cylindrical boss I, boss II respectively, boss I, boss II are coaxial with the intermediate part respectively, gear body axial is provided with the through-hole, be provided with the keyway on the inner wall of through-hole, a tip of the handle body is connected with I lateral wall of boss, the handle body other end is provided with the kink, and its direction of buckling is the intermediate part axis direction.

Preferably, one end of the handle body is connected with the side wall of the boss I through welding. The connection is firm and reliable, and the tightening force requirement can be met.

Preferably, the depth of the key groove is 1-2 cm. The arrangement can well buckle the positioning key on the crankshaft without weakening the rigidity of the whole gear body.

Preferably, the bending angle of the bending part is 90 degrees, and the bending length is 10-12 cm. Therefore, a worker can conveniently hold the bent part, and the length is easily blocked by the supporting bracket without touching other parts.

The utility model has the advantages that:

the utility model discloses through entangling the key on the bent axle with the keyway in the gear body through-hole, hold the handle body and rotate around the gear body to the flexion and support the support, can accomplish camshaft bolt tightening work with the constant torque spanner, easy operation has realized the high efficiency of assembly; the invention comprises a gear body and a handle body, has few parts, is simple to manufacture integrally and saves processing cost.

Drawings

Fig. 1 is a schematic structural view of a camshaft bolt tightening tool provided in an embodiment of the present invention;

fig. 2 is a left side view of a camshaft bolt tightening tool according to an embodiment of the present invention;

fig. 3 is a front view of a camshaft bolt tightening tool provided in an embodiment of the present invention during a tightening assembly process;

fig. 4 is a top view of a camshaft bolt tightening tool provided in an embodiment of the present invention during a tightening assembly process;

in the figure, 1-gear body, 2-handle body, 3-middle part, 4-boss I, 5-boss II, 6-bending part, 7-through hole, 8-key groove, 9-camshaft main chain wheel, 10-camshaft bolt, 11-chain, 12-engine shell, 13-crankshaft small head, 14-supporting bracket and 15-positioning key.

Detailed Description

In order to explain the technical content, the achieved objects and the effects of the present invention in detail, the following description is made in conjunction with the embodiments and the accompanying drawings.

Examples

As shown in fig. 1 and 2, the utility model provides a camshaft bolt tightening tool, including gear body 1, the handle body 2, gear body 1 includes intermediate part 3, intermediate part 3 is the cylinder, is provided with the sprocket on its outer wall, 3 both ends faces of intermediate part are provided with cylindrical boss I4, boss II 5 respectively, boss I4, boss II 5 are coaxial with intermediate part 3 respectively, gear body 1 axial is provided with through-hole 7, be provided with keyway 8 on through-hole 7's the inner wall, a tip of the handle body 2 is connected with I4 lateral wall of boss, the 2 other ends of the handle body are provided with kink 6, and its direction of buckling is 3 axis directions of intermediate part.

As shown in fig. 1-4, in the actual assembly operation, after the chain 11 is mounted on the camshaft main sprocket 9 and the sprocket on the crankshaft small head 13, because the chain 11 makes the crankshaft small head 13 rotate in the same direction as the camshaft main sprocket 9, the camshaft bolt 10 at the end of the camshaft main sprocket 9 is firstly screwed to the chain 11 to start transmission, then a positioning key is mounted in the key slot of the crankshaft small head 13, then an operator can hold the gear body 1 with one hand and hold the bent part 6 on the handle body 2 with the other hand, align the key slot 8 on the gear body 1 with the positioning key 15 of the crankshaft small head 13, press the gear body 1 into the crankshaft small head 13, at this time, the positioning key 15 is nested in the key slot 8, and the crankshaft small head 13 is inserted into the through hole 7, so that the handle body 2 can be pulled and rotated with the crankshaft small head 13 as the shaft center, and the crankshaft small head 13 also rotates at the same time, as shown in fig. 4, when the bending portion 6 of the handle body 2 is rotated against the support bracket 14, at which time the small crankshaft head 13 is locked against further rotation due to the bending portion 6 being blocked by the support bracket 14, the camshaft bolt 10 can be tightened with a fixed-torque wrench until the camshaft bolt has been tightened to a predetermined fixed value of 120Nm, at which time the camshaft bolt has been tightened. Therefore, the positioning key of the small head of the crankshaft is sleeved by the tool key groove 8, the handle body 2 is held to rotate around the small head 13 of the crankshaft as the axis center, and finally the camshaft bolt 10 can be screwed up by making a constant force wrench, so that the whole process is simple to operate and high in assembly efficiency; and this frock includes gear body 1, handle body 2, and spare part is few, and simple manufacture practices thrift the processing cost.

Example 2

The other parts of the present embodiment are the same as those of embodiment 1, except that one end of the handle body 2 is connected to the side wall of the boss i 4 by welding. The connection is firm and reliable, and the tightening force requirement can be met.

Example 3

The other parts of the present embodiment are the same as those of embodiment 1, except that the depth of the key groove 8 on the gear body 1 is 1-2 cm. This arrangement allows the detent key on the crankshaft to be well nested without impairing the rigidity of the entire gear body 1.

Example 4

The other parts of this embodiment are the same as embodiment 1, wherein the different parts are that the bending angle of the bending part 6 is 90 degrees, and the bending length is 10-12 cm. This facilitates the worker's grasping of the bent portion 6, and such a length is easily blocked by the support bracket 14.

Although the invention has been described in detail and with reference to specific embodiments thereof, it will be apparent to one skilled in the art that modifications and improvements can be made thereto. Therefore, such modifications and improvements are intended to be within the scope of the invention as claimed.

Claims

1. The utility model provides a camshaft bolt tightening frock, its characterized in that, includes the gear body, the handle body, the gear body includes the intermediate part, the intermediate part is the cylinder, is provided with the sprocket on its outer wall, intermediate part both ends face is provided with cylindrical boss I, boss II respectively, boss I, boss II are coaxial with the intermediate part respectively, gear body axial is provided with the through-hole, be provided with the keyway on the inner wall of through-hole, a tip of the handle body is connected with I lateral wall of boss, the handle body other end is provided with the kink, and its direction of buckling is the intermediate part axis direction.

2. The tool for tightening the camshaft bolt as claimed in claim 1, wherein one end of the handle body is connected with the side wall of the boss I by welding.

3. The camshaft bolt tightening tool according to claim 1, wherein the depth of the key groove is 1-2 cm.

4. The camshaft bolt tightening tool according to claim 1, wherein the bending angle of the bending portion is 90 degrees, and the bending length is 10-12 cm.