CN213870695U

CN213870695U - Fastener for engine cylinder cover

Info

Publication number: CN213870695U
Application number: CN202021997688.2U
Authority: CN
Inventors: 徐治国; 王安娣; 许克琴
Original assignee: Yancheng Tenghong Metal Products Co ltd
Current assignee: Yancheng Tenghong Metal Products Co ltd
Priority date: 2020-09-14
Filing date: 2020-09-14
Publication date: 2021-08-03
Anticipated expiration: 2030-09-14

Abstract

The utility model discloses a fastener for engine cylinder lid, including cylinder body and the cylinder cap of setting at the cylinder body upside, the inside of cylinder body and cylinder cap is equipped with the connecting hole, connecting hole internal thread connection has outer screw rod, outer screw rod's upper end fixedly connected with nut, outer screw rod's inside is equipped with interior screw hole, be equipped with interior screw rod in the interior screw hole, be equipped with the backing plate between nut and the cylinder cap, the backing plate cover is established in outer screw rod's outside, outer screw rod's lower part is equipped with a plurality of draw-in grooves, be equipped with the kelly in the draw-in groove, the kelly passes the draw-in groove and communicates with each other with interior screw hole, the one end fixedly connected with fixture block of draw-in groove is kept away from to the kelly, the fixture block is close to one side fixedly connected with reset spring of kelly, reset spring overlaps and establishes the outside at the kelly. The utility model discloses can effectively improve the joint strength between bolt and the connecting hole to avoid the bolt not hard up, improve the life of engine.

Description

Fastener for engine cylinder cover

Technical Field

The utility model relates to a fastener technical field especially relates to fastener for engine cylinder lid.

Background

The engine body is a framework which forms the engine, is a mounting base of each mechanism and each system of the engine, and is internally and externally provided with all main parts and accessories of the engine to bear various loads. Therefore, the body must have sufficient strength and rigidity. The engine body group mainly comprises parts such as an air cylinder body, a cylinder sleeve, a cylinder cover, a cylinder gasket and the like, wherein the air cylinder body is a basic part of the engine, and the cylinder cover is one of main parts of the engine. All parts of the engine are assembled on the basis of the engine, so the technical condition directly influences the repair quality and the service life of the engine. The close fit between the cylinder cover and the plane of the cylinder body is realized by the function of the gasket and the correct screwing of the cylinder cover bolt and the cylinder cover nut. The cylinder cover and the cylinder body of the existing engine are connected by directly rotating the bolt into the connecting hole, the cylinder cover and the cylinder body are fixedly connected through threads, the engine can vibrate during operation, certain displacement deviation can be generated between the cylinder body and the cylinder cover, the bolt is loosened, the firmness degree of the connection part of the cylinder body and the cylinder cover is reduced, the operation of the engine can be influenced, the oil and water leakage condition is generated, and even the engine is damaged.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the problem that the bolt becomes flexible and leads to the engine damage easily appears in the in-process of engine operation in the mode through bolt lug connection cylinder cap and cylinder body among the prior art, and the fastener for the engine cylinder cap that provides.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

fastener for engine cylinder lid, including cylinder body and the cylinder cap of setting at the cylinder body upside, the inside of cylinder body and cylinder cap is equipped with the connecting hole, connecting hole internal thread connection has outer screw rod, outer screw rod's upper end fixedly connected with nut, outer screw rod's inside is equipped with the interior screw hole, be equipped with interior screw rod in the interior screw hole, be equipped with the backing plate between nut and the cylinder cap, the backing plate cover is established in outer screw rod's outside, outer screw rod's lower part is equipped with a plurality of draw-in grooves, be equipped with the kelly in the draw-in groove, the kelly passes the draw-in groove and communicates with each other with interior screw hole, the one end fixedly connected with fixture block of draw-in groove is kept away from to the kelly, the fixture block is close to one side fixedly connected with reset spring of kelly, reset spring overlaps the outside of establishing at the kelly.

In the above-mentioned fastener for an engine cylinder head, the length of the connecting hole is the same as that of the outer bolt.

In the fastener for the engine cylinder cover, the upper part of the inner threaded hole is provided with threads, and the inner threaded hole is in threaded connection with the inner screw rod.

In the fastener for the engine cylinder cover, the upper end of the inner screw rod penetrates through the nut to be communicated with the outside, the upper end of the inner screw rod is provided with the inner clamping hole, and the lower end of the inner screw rod is hemispherical.

In the fastener for the engine cylinder cover, one end, far away from the inner threaded hole, of the clamping groove penetrates through the outer screw rod to be communicated with the outside, and one end, far away from the clamping block, of the clamping rod is hemispherical.

In the fastener for the engine cylinder cover, the middle part of the cylinder body is provided with the annular groove, one side of the annular groove, which is close to the connecting hole, is communicated with the inside of the connecting hole, and the size of the annular groove is matched with that of the clamping block.

The utility model discloses possess following advantage: set up threaded connection between outer screw rod and the connecting hole, can carry out preliminary fastening between cylinder body and the cylinder cap, set up nut and outer screw rod fixed connection simultaneously, the accessible rotates the removal of the mode control outer screw rod of nut. Set up the middle part that the internal screw rod is in the outer screw rod, can fill outer screw rod, increase outer screw rod's bulk strength, set up simultaneously that the inside callipers hole is interior concave type, the operating personnel of being convenient for rotates the inside callipers hole alone. The clamping block is matched with the annular groove, after the outer screw rod is fastened, the clamping rod and the clamping block are pushed to move in the annular groove in a mode of rotating the inner clamping hole, so that the fastening degree between the outer screw rod and the cylinder body is increased, the relative displacement between the outer screw rod and the connecting hole is further avoided, and the outer screw rod is prevented from loosening.

Drawings

Fig. 1 is a schematic structural view of a fastener for an engine cylinder head according to the present invention;

fig. 2 is an enlarged schematic view of a point a in fig. 1.

In the figure: the cylinder comprises a cylinder body 1, a cylinder cover 2, a connecting hole 3, an outer screw rod 4, a nut 5, an inner screw hole 6, an inner screw rod 7, an inner clamping hole 8, an annular groove 9, a clamping groove 10, a clamping rod 11, a clamping block 12, a reset spring 13 and a backing plate 14.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

Referring to fig. 1-2, a fastening member for an engine cylinder cover comprises a cylinder body 1 and a cylinder cover 2 arranged on the upper side of the cylinder body 1, the cylinder cover 2 and the cylinder body 1 are attached to each other, a connecting hole 3 is formed inside the cylinder body 1 and the cylinder cover 2, an outer screw rod 4 is connected to the connecting hole 3 in a threaded manner, the cylinder cover 2 and the cylinder body 1 can be connected by connecting the outer screw rod 4 to the connecting hole 3 in a threaded manner, a nut 5 is fixedly connected to the upper end of the outer screw rod 4, the outer screw rod 4 can be controlled to rotate by rotating the nut 5, an inner screw hole 6 is formed inside the outer screw rod 4, an inner screw rod 7 is arranged inside the inner screw hole 6, the inner screw rod 7 can be separated from the inner screw hole 6, a backing plate 14 is arranged between the nut 5 and the cylinder cover 2, the backing plate 14 is sleeved outside the outer screw rod 4, the backing plate 14 plays a buffering role, a plurality of clamping grooves 10 are formed in the lower portion of the outer screw rod 4, and the clamping grooves 10 are perpendicular to the central line of the outer screw rod 4, be equipped with the kelly 11 in the draw-in groove 10, kelly 11 passes draw-in groove 10 and communicates with each other with interior screw hole 6, and one end fixedly connected with fixture block 12 that draw-in groove 10 was kept away from to kelly 11 can promote fixture block 12 through kelly 11 and remove, and one side fixedly connected with reset spring 13 that fixture block 12 is close to kelly 11, and reset spring 13 cover is established in the outside of kelly 11, can reset fixture block 12 through reset spring 13.

The connecting hole 3 and the outer screw rod 4 are the same in length, so that the outer screw rod 4 can be conveniently rotated to a proper position, the upper part of the inner screw hole 6 is provided with threads, the inner screw hole 6 is in threaded connection with the inner screw rod 7, and the inner screw rod 7 can be connected with the inner screw hole 6 in a rotating mode.

The upper end of the inner screw 7 penetrates through the nut 5 to be communicated with the outside, the rotation of the inner screw 7 is controlled conveniently from the outside, an inner clamping hole 8 is formed in the upper end of the inner screw 7, the rotation of the inner screw 7 can be controlled conveniently through the inner clamping hole 8, and the lower end of the inner screw 7 is hemispherical.

One end of the clamping groove 10 far away from the inner screw hole 6 penetrates through the outer screw rod 4 to be communicated with the outside, so that the clamping block 12 can be conveniently moved out of the clamping groove 10, and one end of the clamping rod 11 far away from the clamping block 12 is hemispherical and can push the clamping rod 11 to move when being in contact with the lower end of the inner screw rod 7.

The middle part of the cylinder body 1 is provided with an annular groove 9, one side of the annular groove 9 close to the connecting hole 3 is communicated with the inside of the connecting hole 3, the size of the annular groove 9 is matched with that of a clamping block 12, and the clamping block 12 can enter the annular groove 9, so that the up-and-down movement of the external screw rod 4 is limited.

The working principle is as follows:

when the cylinder body 1 is connected with the cylinder cover 2, the lower end of the outer screw rod 4 firstly penetrates through the base plate 14 and penetrates through the connecting hole to fasten the screw, at the moment, one end, far away from the inner screw hole 6, of the clamping groove 10 is opposite to the annular groove 9, the inner screw rod 7 is inserted into the inner screw hole 6, the inner screw rod 7 is rotated through the inner clamping hole 8, due to the fact that the inner screw rod 7 is in threaded connection with the outer screw rod 4, the lower end of the inner screw rod 7 moves downwards to be in contact with one end, far away from the clamping block 12, of the clamping rod 11, the clamping rod 11 is pushed to move towards the direction far away from the inner screw hole 6 along with the downward movement of the inner screw rod 7, the clamping block 12 is pushed to enter the annular groove 9, the up-down movement of the outer screw rod 4 is limited, and the fastening effect of the outer screw rod 4 is improved.

Claims

1. Fastener for engine cylinder cover, including cylinder body (1) and cylinder cap (2) of setting at cylinder body (1) upside, its characterized in that, the inside of cylinder body (1) and cylinder cap (2) is equipped with connecting hole (3), connecting hole (3) internal thread connection has outer screw rod (4), the upper end fixedly connected with nut (5) of outer screw rod (4), the inside of outer screw rod (4) is equipped with interior screw hole (6), be equipped with interior screw rod (7) in interior screw hole (6), be equipped with backing plate (14) between nut (5) and cylinder cap (2), backing plate (14) cover is established in the outside of outer screw rod (4), the lower part of outer screw rod (4) is equipped with a plurality of draw-in grooves (10), be equipped with kelly (11) in draw-in groove (10), kelly (11) pass draw-in groove (10) and communicate with interior screw hole (6), the one end fixedly connected with fixture block (12) of draw-in groove (10) is kept away from to kelly (11), one side of the clamping block (12) close to the clamping rod (11) is fixedly connected with a return spring (13), and the return spring (13) is sleeved outside the clamping rod (11).

2. Fastener for engine heads according to claim 1, characterized in that said attachment hole (3) and said external shank (4) have the same length.

3. The engine head fastener according to claim 2, characterized in that the upper part of the inner threaded hole (6) is provided with threads, and the inner threaded hole (6) is in threaded connection with the inner threaded rod (7).

4. The engine cylinder head fastener according to claim 3, characterized in that the upper end of the inner screw (7) passes through the nut (5) and is communicated with the outside, the upper end of the inner screw (7) is provided with an inner clamping hole (8), and the lower end of the inner screw (7) is hemispherical.

5. The engine cylinder head fastener according to claim 4, characterized in that one end of the clamping groove (10) far away from the inner screw hole (6) passes through the outer screw rod (4) to be communicated with the outside, and one end of the clamping rod (11) far away from the clamping block (12) is hemispherical.

6. The engine cylinder head fastener according to claim 5, characterized in that the middle of the cylinder body (1) is provided with an annular groove (9), one side of the annular groove (9) close to the connecting hole (3) is communicated with the inside of the connecting hole (3), and the size of the annular groove (9) is matched with the clamping block (12).