CN213889841U

CN213889841U - Spark plug disassembly and inspection device

Info

Publication number: CN213889841U
Application number: CN202022365435.XU
Authority: CN
Inventors: 王猛
Original assignee: Chongqing Cummins Engine Co Ltd
Current assignee: Chongqing Cummins Engine Co Ltd
Priority date: 2020-10-21
Filing date: 2020-10-21
Publication date: 2021-08-06
Anticipated expiration: 2030-10-21

Abstract

The utility model discloses a spark plug dismounting device, wherein the inner wall of the inner extending end of a sleeve is provided with a polygonal connecting cavity for driving a spark plug to rotate; the extending end is used for being connected with a spanner; a clamp spring is arranged on the side wall of the inward extending end of the sleeve, the clamp spring is made of a spring steel wire and extends along the outer surface of the sleeve, the clamp spring has certain elasticity, at least one pair of elastic convex blocks capable of protruding out of the inner wall of the sleeve are arranged on the clamp spring, and the elastic convex blocks can be matched and clamped with a groove on the spark plug; during the use, insert the cylinder cap with telescopic end of stretching in, polygonal connection chamber on the sleeve is blocked with spark plug periphery mutually supports, elasticity lug card on the jump ring is gone into in spark plug's the recess, further drives the spark plug when the sleeve is driven rotatoryly by the spanner and rotates, receives elasticity lug's roof pressure after spark plug and the cylinder cap separation, and the spark plug is taken out together with the sleeve is synchronous, can be applied to the less condition of sleeve wall thickness, takes out the spark plug under the less condition in surrounding space, and the scope of application is wider.

Description

Spark plug disassembly and inspection device

Technical Field

The utility model relates to an engine maintenance technical field further relates to a spark plug tears open and examines device.

Background

Spark Plugs (Spark Plugs) are used for discharging pulse high voltage power sent by a high voltage wire to break down air between two electrodes of the Spark Plugs, and electric sparks are generated to ignite mixed gas in a cylinder. Spark plug installs in the cylinder cap of engine, need use the hexagonal socket to twist the dress, and in order to facilitate taking out spark plug, the engine all adopts magnetized hexagonal socket dismouting spark plug at present, when taking off spark plug, inserts the cylinder cap with the sleeve, unscrews behind the spark plug, on the spark plug was inhaled the sleeve through magnetic force by magnetism, takes out spark plug in the lump when the sleeve upwards takes out.

The magnetized sleeve needs to have enough wall thickness, otherwise, enough magnetic attraction force cannot be generated, so the method for taking out the spark plug by adopting the magnetized sleeve is only suitable for the use condition with larger peripheral space of the spark plug, and when the cylinder cover with smaller peripheral space of the spark plug is met, the spark plug cannot be taken out by using the magnetized sleeve.

It is a technical problem to be solved by those skilled in the art how to take out the spark plug under the condition of small surrounding space.

SUMMERY OF THE UTILITY MODEL

The utility model provides a spark plug tears open and examines device can take out spark plug under the less condition in space on every side, and concrete scheme is as follows:

a spark plug dismounting and detecting device comprises a sleeve, wherein a polygonal connecting cavity is formed in the inner wall of an inward extending end of the sleeve, and the outward extending end is used for being connected with a wrench;

the spark plug is characterized in that a clamp spring is installed on the side wall of the inward extending end of the sleeve, the clamp spring is made of a spring steel wire and extends along the outer surface of the sleeve, at least one pair of elastic convex blocks capable of protruding out of the inner wall of the sleeve are arranged on the clamp spring, and the elastic convex blocks can be matched with and clamped by a groove in the spark plug.

Optionally, the clamp spring includes an arc section and a flat section, the arc section can be clamped in a clamping groove formed in a side wall of the sleeve, and the flat section is parallel to the length direction of the sleeve.

Optionally, the sleeve is clamped with two clamp springs.

Optionally, the clamping groove is an annular groove formed in the outer surface of the sleeve, a containing hole used for limiting the straight section is formed in the sleeve in a penetrating mode, and the containing hole is a long-strip-shaped through hole with the length direction along the length direction of the sleeve.

Optionally, the width of the receiving hole corresponding to the position of the elastic bump is larger than the width of the other positions.

Optionally, the overhanging end of the sleeve is provided with a wrench joint, and the wrench joint is in interference fit or welded fixation with the sleeve.

The utility model provides a spark plug dismounting device, wherein the inner extending end of the sleeve can be inserted into a cylinder cover, and the inner wall of the inner extending end of the sleeve is provided with a polygonal connecting cavity for being matched with a spark plug to transmit torque so as to drive the spark plug to rotate; the extending end is used for being connected with a wrench, and rotating acting force is applied through the wrench; a clamp spring is arranged on the side wall of the inward extending end of the sleeve, the clamp spring is made of a spring steel wire and extends along the outer surface of the sleeve, the clamp spring has certain elasticity, at least one pair of elastic convex blocks capable of protruding out of the inner wall of the sleeve are arranged on the clamp spring, and the elastic convex blocks can be matched and clamped with a groove on the spark plug; during the use, insert the cylinder cap with telescopic end of stretching in, polygonal connection chamber on the sleeve is mutually supported with the spark plug periphery and is blocked, can transmit the moment of torsion, elasticity lug card on the jump ring is gone into in the recess of spark plug, further drive the spark plug when the sleeve is driven rotatoryly by the spanner and rotate, after spark plug and cylinder cap separation, receive elasticity lug's roof pressure, the spark plug is taken out together with the sleeve is synchronous, adopt the device, can be applied to the less condition of sleeve wall thickness, take out the spark plug under the less condition in space on every side, the scope of using is wider.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 and fig. 2 are respectively an overall appearance structural diagram and a two-end section structural diagram of the spark plug dismantling device of the present invention;

FIG. 3A is a schematic structural view of the insertion of the spark plug removing device into the cylinder head according to the present invention;

FIG. 3B is a partial enlarged view of portion A of FIG. 3A;

FIG. 4 is a schematic structural diagram of a clamp spring;

FIG. 5 is a partial block diagram of the inwardly extending end of the sleeve;

fig. 6 is a schematic structural view of the wrench joint.

The figure includes:

the wrench comprises a sleeve 1, a clamping groove 11, an accommodating hole 12, a clamp spring 2, an elastic bump 21, an arc section 22, a straight section 23 and a wrench joint 3.

Detailed Description

The core of the utility model is to provide a spark plug tears open and examines device can take out the spark plug under the less condition in surrounding space.

In order to make those skilled in the art better understand the technical solution of the present invention, the following will describe the spark plug dismantling device in detail with reference to the accompanying drawings and specific embodiments.

As shown in fig. 1 and fig. 2, the overall appearance structure diagram and the two-end section structure diagram of the spark plug dismantling device of the present invention are respectively shown; the utility model discloses a spark plug dismantles and examines device includes sleeve 1, jump ring 2 isotructure, and sleeve 1 is a bar-shaped tubular structure, and the inner wall of the end that stretches into of sleeve 1 sets up polygon connection chamber, and the interior of sleeve 1 stretches into in the mounting hole of installation spark plug on the cylinder cap; because the structure of screwing on the spark plug is mostly the hexagon, consequently the polygon is connected the chamber and is set up to the hexagon usually, with the structure appearance phase-match of screwing of spark plug to exert torsional force to the spark plug. The overhanging end of sleeve 1 is located the cylinder cap when using outside, overhanging end is used for being connected with the spanner, and transmission moment of torsion is connected with the spanner to sleeve 1, drives sleeve 1 through the spanner and rotates, and sleeve 1 rotates and then makes the spark plug rotate, realizes screwing up or unscrews.

A clamp spring 2 is arranged on the side wall of the inward extending end of the sleeve 1, the clamp spring 2 is made of a spring steel wire and extends along the outer surface of the sleeve 1, and the clamp spring 2 does not occupy space basically in the thickness direction of the sleeve 1; the clamp spring 2 is provided with at least one pair of elastic lugs 21 capable of protruding out of the inner wall of the sleeve 1, namely, the spark plug is clamped by the two elastic lugs 21 at least so as to be clamped on the side surface, the elastic lugs 21 can be matched and clamped with a groove on the spark plug, and the groove on the spark plug is arranged along the circumferential direction; as shown in fig. 3A, it is a schematic structural view of the spark plug dismounting and inspecting device of the present invention inserted into the cylinder head; FIG. 3B is an enlarged view of a portion A of FIG. 3A, wherein B represents the spark plug; when the sleeve 1 is inserted into the cylinder head, the upper end of the spark plug is inserted into the sleeve 1, and the elastic lug 21 is pushed open towards two sides by the spark plug in the process of insertion until the elastic lug 21 is rebounded and clamped when aligned with the annular groove on the spark plug.

The sleeve 1 is inserted into the cylinder cover to rotate to drive the spark plug to rotate and separate from the cylinder cover, and the spark plug is pressed relatively by the elastic lug 21, so that the spark plug is clamped by the elastic lug 21 after being separated from the cylinder cover, and the sleeve 1 is taken out together with the spark plug when being pulled out outwards.

The utility model discloses a jump ring 2 is made in the bending of spring steel wire, is buckled by jump ring 2 and is formed elastic lug 21, does not occupy sleeve 1's lateral wall space basically, consequently can be applied to the less cylinder cap in space, takes out the spark plug under the less condition of 1 wall thickness of sleeve, need not make the sleeve magnetization, and the space size scope that consequently can use is wider.

On the basis of the above scheme, as shown in fig. 4, a schematic structural diagram of the snap spring 2 is shown; the clamp spring 2 of the utility model comprises an arc section 22 and a flat section 23, the arc section 22 can be clamped in a clamping groove 11 arranged on the side wall of the sleeve 1, the clamping groove 11 is arranged along the circumference of the sleeve 1 and is positioned on a certain cross section of the sleeve 1; the straight section 23 of the clamp spring 2 is parallel to the length direction of the sleeve 1, the elastic lug 21 is arranged on the straight section 23 and is formed by locally bending the straight section 23, one steel wire is bent to form two straight sections 23, one elastic lug 21 is arranged on each straight section 23, the protruding directions of the two elastic lugs 21 are opposite, and the two elastic lugs are respectively in point contact with two opposite points of the spark plug.

Preferably, the utility model discloses clamp two jump rings 2 on sleeve 1, every arc section 22's radian is 180 degrees, and two jump rings 2's arc section 22 encloses into a whole circumference jointly, and the position of the last elastic convex block 21 of two jump rings 2 is close, and is bigger to the packing force of spark plug through totally four elastic convex blocks 21 on two jump rings 2, prevents that the in-process of outwards extracting from dropping.

As shown in fig. 5, is a partial structure view of the inward extending end of the sleeve 1; specifically, the utility model provides a draw-in groove 11 is the annular groove who sets up at sleeve 1 surface, and draw-in groove 11 is the sunken groove structure who sets up of sleeve 1 surface, and the degree of depth of draw-in groove 11 is less than sleeve 1's lateral wall thickness. The sleeve 1 is provided with the accommodating hole 12 used for limiting the straight section 23 in a penetrating mode, the accommodating hole 12 is a long-strip-shaped through hole with the length direction along the length direction of the sleeve 1, the accommodating hole 12 is a through hole, the straight section 23 is sunk into the accommodating hole 12 to play a limiting role, and the clamp spring 2 is guaranteed not to be separated from the sleeve 1.

Preferably, the width of the accommodating hole 12 corresponding to the position of the elastic bump 21 is greater than the width of other positions, as shown in fig. 4, the elastic bump 21 is disposed at the end of the straight section 23, and the width of the end of the accommodating hole 12 is greater than the width of other parts, so that the elastic bump 21 has a larger moving space.

Specifically, the utility model is provided with a wrench joint 3 at the overhanging end of the sleeve 1, the wrench joint 3 is fixed with the sleeve 1 by interference fit or welding, as shown in fig. 6, which is a schematic structural diagram of the wrench joint 3; the wrench joint 3 is of a stepped annular step structure, the part with the smaller outer diameter can be inserted into the overhanging end of the sleeve 1, the part with the larger outer diameter is exposed out of the sleeve 1, and the exposed end of the wrench joint 3 is provided with a polygonal through hole which is matched with a wrench to transmit torque.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. The spark plug dismounting and inspecting device is characterized by comprising a sleeve (1), wherein a polygonal connecting cavity is formed in the inner wall of the inward extending end of the sleeve (1), and the outward extending end is used for being connected with a wrench;

the spark plug is characterized in that a clamp spring (2) is installed on the side wall of the inner extending end of the sleeve (1), the clamp spring (2) is made of a spring steel wire and extends along the outer surface of the sleeve (1), at least one pair of elastic lugs (21) capable of protruding out of the inner wall of the sleeve (1) are arranged on the clamp spring (2), and the elastic lugs (21) can be matched with and clamped by grooves in the spark plug.

2. The spark plug removal and inspection device according to claim 1, wherein the clamp spring (2) comprises a circular arc section (22) and a flat section (23), the circular arc section (22) can be clamped in a clamping groove (11) formed in the side wall of the sleeve (1), and the flat section (23) is parallel to the length direction of the sleeve (1).

3. The spark plug removal device according to claim 2, wherein two snap springs (2) are clamped on the sleeve (1).

4. The spark plug removal and inspection device according to claim 2, wherein the clamping groove (11) is an annular groove formed in the outer surface of the sleeve (1), a containing hole (12) for limiting the straight section (23) is formed in the sleeve (1) in a penetrating mode, and the containing hole (12) is an elongated through hole with the length direction along the length direction of the sleeve (1).

5. The spark plug removal device according to claim 4, wherein the width of the receiving hole (12) at a position corresponding to the elastic projection (21) is larger than the width at other positions.

6. The spark plug removal and inspection device according to claim 2, wherein the outward extending end of the sleeve (1) is provided with a wrench joint (3), and the wrench joint (3) is in interference fit or welded fixation with the sleeve (1).