CN209342270U - A camshaft plug pulling force testing tool - Google Patents

Abstract

The utility model discloses a camshaft plug drawing force testing tool, which is characterized in that it comprises a cylindrical fixture, and the cylindrical fixture is provided with a cylindrical positioning hole for fixing the cylindrical fixture on a stretching machine in the form of a bolt. One end of the cylindrical fixture is equipped with a camshaft and a plug for clamping the pipe. The bottom of the cylindrical fixture is provided with a through hole, and the side of the through hole is provided with a groove matching the plug. The camshaft is quickly fixed by a bolt on the stretching machine. The tooling of the utility model is convenient for clamping, which is convenient for the staff to quickly install the fixture, fast fix the plug, easy to operate, not easy to deform, and has high accuracy and reduces errors. It is suitable for the test of the pulling force of the engine camshaft plug in the engine factory . It is convenient for the laboratory to clamp and test the camshaft plug.

Description

A camshaft plug pulling force testing tool

technical field

The utility model relates to a camshaft plug pulling force testing tool, which belongs to the technical field of inspection tools.

Background technique

With the increasing requirements of laws and regulations and environmental protection, in order to reduce fuel consumption, the camshaft of the engine adopts a lightweight design, and the camshaft adopts a hollow form to reduce weight. As for the camshaft plug, the plug is pressed into the pipe in an interference fit through thermal expansion and contraction. An important monitoring of the press-fit quality is the pull-out force of the plug. The traditional test method used to be to clamp the plug and both ends of the pipe with calipers and other mechanisms, and then pull it through a stretching machine to complete the test of the pulling force. At present, the pull-out force of the camshaft plug is tested by a stretching machine. Due to the compression at the plug, there is a certain deformation, so there will be a certain test error, and the test steps are relatively cumbersome.

Contents of the invention

The technical problem to be solved by the utility model is: how to simply and accurately test the pulling force of the camshaft plug.

In order to solve the above-mentioned technical problems, the technical solution of the present invention is to provide a camshaft plug pulling force test tool, which is characterized in that it includes a cylindrical clamp, and the cylindrical clamp is provided with a bolt to fix the cylindrical clamp. In the cylindrical positioning hole on the stretching machine, one end of the cylindrical clamp is provided with a camshaft and a plug for clamping the pipe, the bottom of the cylindrical clamp is provided with a through hole, and the side of the through hole is provided with a matching plug Groove, the camshaft is quickly fixed on the stretching machine through a bolt.

Preferably, the camshaft includes a cylindrical barrel and a platform connected thereto. The platform is provided with a lower pipe groove and a lower bolt hole. The lower bolt holes are located on both sides of the lower pipe groove. The connection with the platform is provided with a straight hole, and the straight hole is matched with the lower pipe groove, and the top of the platform is provided with a plug for clamping the pipe together.

Preferably, the cylindrical surface on both sides of the cylindrical barrel is provided with through limiting holes.

Preferably, a connection hole is provided on the other side plane of the cylindrical barrel.

Preferably, the plug includes a support plate, an upwardly protruding bump is provided in the middle of the support plate, and an upper pipe groove corresponding to the position of the lower pipe groove is provided under the projection, and the support plate is located on the There are upper bolt holes corresponding to the positions of the lower bolt holes on both sides.

Preferably, the shape of the upper pipe groove and the shape of the lower pipe groove match with the outer side of the pipe respectively.

The tooling of the utility model is convenient for clamping, which is convenient for the staff to quickly install the fixture, fast fix the plug, easy to operate, not easy to deform, and has high precision and reduced error. It is suitable for the test of the pulling force of the engine camshaft plug in the engine factory . It is convenient for the laboratory to clamp and test the camshaft plug.

Description of drawings

Fig. 1 is a structural schematic diagram of a camshaft plug pulling force test tool;

Fig. 2 is the schematic diagram of camshaft;

Fig. 3 is the schematic diagram of plug;

Fig. 4 is the front view of camshaft;

Fig. 5 is the left view of camshaft;

Fig. 6 is the right view of camshaft;

Figure 7 is a top view of the camshaft.

Detailed ways

In order to make the utility model more comprehensible, preferred embodiments are described in detail below with accompanying drawings.

The utility model is a camshaft plug pulling force test tool, as shown in Figure 1, which is mainly composed of two parts, namely the upper fast clamping fixture and the lower multi-bolt fixing fixture. The quick clamping fixture is a cylindrical fixture 1, and a cylindrical positioning hole is provided on the cylindrical fixture 1, and the cylindrical fixture 1 can be integrally fixed on the stretching machine in the form of a bolt. The bottom of the cylindrical fixture 1 is provided with a through hole, the camshaft 2 and the plug 3 can be inserted, the side of the through hole is provided with a square groove, the groove matches the plug 3, and the plug 3 is fixed by a bolt. The lower multi-bolt fixing fixture also adopts the form of a circular through hole, which can be quickly fixed on the stretching machine in the form of a bolt. The lower fixture is mainly used to clamp the camshaft tube part, and adopts an interference fit method. Tighten and fix with eight high-strength bolts in a groove-shaped fixture.

As shown in Figures 2-7, the camshaft 2 includes a cylindrical barrel 22 and a platform 23 connected thereto. On both sides, a straight hole 21 is provided at the connection between one side of the cylindrical barrel 22 and the platform 23, and the straight hole 21 is matched with the lower pipe groove 26, and the top of the platform 23 is provided with a plug 3 for clamping the pipe together. . The cylindrical surface on both sides of the cylindrical barrel 22 is provided with through limiting holes 24 . A connection hole 27 is provided on the other side plane of the cylindrical barrel 22 .

The plug 3 includes a support plate 31, the middle position of the support plate 31 is provided with an upwardly protruding bump 32, and an upper pipe groove 34 corresponding to the position of the lower pipe groove 26 is provided below the projection 32, and the support plate 31 is located on the Upper bolt holes 33 corresponding to the positions of the lower bolt holes 25 are provided on both sides of the protrusion 32 . The shape of the upper pipe groove 34 and the shape of the lower pipe groove 26 match with the outside of the pipe respectively. The width of the plug 3 is the same as that of the platform 23 on the camshaft 2 .

In this embodiment, there are eight lower bolt holes 25 and eight upper bolt holes 33 .

When the utility model is used, the clamps at the upper and lower parts are all fixed to the stretching mechanism by means of cylindrical bolts. After the two fixtures are fixed, put the camshaft 2 and the plug 3 into the upper fixture, and use the pin to move them down to limit and fix them. This method is convenient for clamping and does not need to be clamped to clamp the plug end, avoiding the error of plug extrusion force test caused by deformation.

The second step is the lower fixture, that is, the fixing of the pipe side. This part adopts the method of interference fit, and eight high-strength bolts are used to clamp the pipe section. Since the clamping method is cylindrical contact, the contact area Larger, uniform force, and solid overall fixation.

After the upper and lower clamps are fixed, the force measuring mechanism can be used to perform tensile tests on the plug and the pipe. In this way, the force value required for the plug to be pulled out can be obtained.

Claims (6)

1. a kind of camshaft plug pulling capacity test fixture, which is characterized in that including cylindrical fixture (1), cylindrical fixture (1) It is equipped with and cylindrical fixture (1) is fixed on by the cylindrical location hole on stretching-machine by bayonet fashion, cylindrical fixture (1) The camshaft (2) and plug (3) for clamping pipe are equipped in one end, the bottom of cylindrical fixture (1) is equipped with through-hole, through-hole side Face is equipped with one and plug (3) matched groove, and camshaft (2) is rapidly secured on stretching-machine by bayonet fashion.

2. a kind of camshaft plug pulling capacity test fixture as described in claim 1, which is characterized in that the camshaft It (2) include column barrel (22) and coupled platform (23), platform (23) is equipped with lower tube seat (26) and lower bolt hole (25), lower bolt hole (25) is located at the two sides of lower tube seat (26), the company on a side plane of column barrel (22) with platform (23) It meets place and is equipped with straight hole (21), straight hole (21) matches connection with lower tube seat (26), and the top of platform (23) is equipped with to be clamped together The plug (3) of pipe.

3. a kind of camshaft plug pulling capacity test fixture as claimed in claim 2, which is characterized in that the column barrel (22) cylindrical surface of two sides is equipped with the limit hole (24) of perforation.

4. a kind of camshaft plug pulling capacity test fixture as claimed in claim 2, which is characterized in that the column barrel (22) another side plane is equipped with connecting hole (27).

5. a kind of camshaft plug pulling capacity test fixture as claimed in claim 2, which is characterized in that the plug (3) Including support plate (31), the middle position of support plate (31) is equipped with the convex block (32) to raise upward, and convex block is equipped with below (32) Upper tube seat (34) corresponding with lower tube seat (26) position, the two sides that convex block (32) are located in support plate (31) are equipped with and lower bolt The corresponding upper bolt hole (33) in hole (25) position.

6. a kind of camshaft plug pulling capacity test fixture as claimed in claim 5, which is characterized in that the upper tube seat (34) shape of shape and lower tube seat (26) respectively with match on the outside of pipe.