CN215408789U

CN215408789U - Wear-resisting tappet of four-stroke gasoline engine

Info

Publication number: CN215408789U
Application number: CN202121465381.2U
Authority: CN
Inventors: 熊洪波; 陈科
Original assignee: Chongqing Kebang Machinery Manufacturing Co ltd
Current assignee: Chongqing Kebang Machinery Manufacturing Co ltd
Priority date: 2021-06-29
Filing date: 2021-06-29
Publication date: 2022-01-04
Anticipated expiration: 2031-06-29

Abstract

The utility model relates to the technical field of four-stroke gasoline engines, in particular to a wear-resistant tappet of a four-stroke gasoline engine, which comprises a tappet, wherein the lower end of the tappet is provided with a runner groove, both ends of the runner groove are provided with through holes, a runner is arranged in the runner groove, a shaft hole is formed in the runner, a fixing device is inserted in the shaft hole, both ends of the shaft hole are respectively provided with two guide grooves, the guide grooves are symmetrically arranged, the bottom ends of the guide grooves are provided with rotating grooves, the bottom end of one rotating groove in the shaft hole is provided with a fixing groove, the periphery of the outer surface of the runner is provided with an antifriction device, the lower end of the tappet is provided with the runner, the runner is contacted with a cam through a steel ball on the runner, the direct contact between the tappet and the cam is avoided, the friction is reduced, the wear resistance of the valve tappet is improved, the service life is prolonged, and the replacement of the runner is very convenient through the disassembly of a first shaft and a second shaft after the runner reaches the service limit, so that the integral replacement of the tappet is avoided, the cost is greatly reduced.

Description

Wear-resisting tappet of four-stroke gasoline engine

Technical Field

The utility model relates to the technical field of four-stroke gasoline engines, in particular to a wear-resistant tappet of a four-stroke gasoline engine.

Background

The working process of the four-stroke gasoline engine comprises four strokes: the gasoline engine is provided with an air inlet valve and an exhaust valve, the opening and closing of the valves are controlled by matching a valve tappet and a cam when the gasoline engine works, the contact part of the lower end of the tappet and the cam is seriously abraded in the long-time use process, usually, a hard alloy sheet is welded to increase the wear resistance, the service life is prolonged, but the service limit is inevitably reached after the service life is reached, the gasoline engine cannot be conveniently replaced, and even if new hard alloy is welded, cracks and air holes are formed due to the thermal influence of a welding joint, so that the embrittlement and the fracture are caused, and the comprehensive mechanical performance is deteriorated.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a wear-resistant tappet of a four-stroke gasoline engine, which aims to solve the problems in the background technology.

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

the utility model provides a four-stroke gasoline engine wear-resisting tappet, includes the tappet, the runner groove has been seted up to the lower extreme of tappet, the through-hole has been seted up at the both ends in runner groove, and installs the runner in the runner groove, the shaft hole has been seted up on the runner, the inside in shaft hole is pegged graft and is had fixing device, and the both ends in shaft hole have seted up two guide ways respectively, the guide way symmetry sets up, and the bottom of guide way has seted up the swivelling chute, and the shaft hole wherein the bottom of one end swivelling chute has seted up the fixed slot, be provided with the antifriction device on the surface circumference of runner.

Preferably, the fixing device comprises a first shaft and a second shaft, the first shaft and the second shaft penetrate through a shaft hole in the rotating wheel and are inserted into a through hole in the tappet, a connecting groove is formed in one end of the first shaft, and two first positioning blocks are fixedly arranged at one end of the first shaft, where the connecting groove is formed.

Preferably, one end of the second shaft is fixedly provided with two second positioning blocks, one end of each positioning block is provided with a bearing hole, a bearing is installed in each bearing hole, and each bearing is matched with a connecting device.

Preferably, the connecting device is a connecting sleeve, one end of the connecting sleeve is inserted in the bearing and connected with the second shaft, a spring is fixedly connected inside the other end of the connecting sleeve, a connecting disc is fixedly connected to the other end of the spring, and a connecting block is fixedly arranged at the front end of the connecting disc.

Preferably, the connecting block is inserted into the connecting groove in a working state, the connecting block is a square block, and the depth of the back degree is equal to that of the connecting groove.

Preferably, the antifriction device is a steel ball, the steel ball is uniformly distributed on the surface of the rotating wheel, the steel ball is inserted into a steel ball groove, the steel ball groove is formed in a mounting groove, the mounting groove is formed in the rotating wheel, insertion holes are formed in two ends of the mounting groove, and the covering device is inserted into the insertion holes.

Preferably, the covering device is an elastic cover plate, the two ends of the elastic cover plate are fixedly provided with inserting blocks, the inserting blocks are inserted into the inserting holes in the working state, the elastic cover plate is provided with matching holes, and steel balls are inserted into the matching holes.

Compared with the prior art, the utility model has the beneficial effects that:

through the practicality of this technical scheme, it has avoided tappet and cam direct contact and then has reduced the friction to install the runner at the lower extreme of tappet and carry out the contact through steel ball on the runner with the cam, and the cooperation of steel ball and cam makes contact between the two rotate more in the same direction as smooth the working effect that has improved the tappet and improved the wearability of valve tappet and prolonged life and thereby the runner reaches the life limit after through axle one with axle two dismantle make the change of runner very convenient the whole change of having avoided the tappet, greatly the cost is reduced.

Drawings

FIG. 1 is an exploded schematic view of a tappet assembly;

FIG. 2 is an enlarged schematic view at A in FIG. 1;

FIG. 3 is an enlarged schematic view at B of FIG. 1;

FIG. 4 is a schematic view of a tappet structure;

FIG. 5 is a schematic structural view of the rotor;

FIG. 6 is a schematic half-section view of the runner;

fig. 7 is a schematic structural diagram of the first shaft.

In the figure: the tappet comprises a tappet 1, a rotating wheel groove 2, a rotating wheel 3, a first shaft 4, a first positioning block 5, a connecting groove 6, a shaft hole 7, a guide groove 8, a rotating groove 9, a mounting groove 10, a steel ball groove 11, an inserting hole 12, a steel ball 13, an elastic cover plate 14, a matching hole 15, a second shaft 16, a second positioning block 17, a bearing 18, a connecting sleeve 19, a spring 20, a connecting disc 21, a connecting block 22 and a fixing groove 23.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1 to 7, the present invention provides a technical solution:

the utility model provides a four-stroke gasoline engine wear-resisting tappet, including tappet 1, runner groove 2 has been seted up to the lower extreme of tappet 1, the through-hole has been seted up at the both ends in runner groove 2, and install runner 3 in the runner groove 2, shaft hole 7 has been seted up on runner 3, the inside grafting in shaft hole 7 has fixing device and fixing device including axle one 4 and axle two 16, axle one 4 and axle two 16 pass the through-hole of axle hole 7 grafting on runner 3 in the tappet 1, and the spread groove 6 has been seted up to the one end of axle one, and set up the fixed bottom that is provided with two first locating pieces 5 and first locating piece 5 and rotates rotatory groove 9 in axle hole 7 through guide way 8 between the one end of spread groove 6 and be the integrated into one piece structure and first locating piece 5 enters into under operating condition.

Two second locating pieces 17 are fixedly arranged at one end of the second shaft 16, a bearing hole is formed in one end of each locating piece 17, a bearing 18 is installed in the bearing hole, the bearing 18 is matched with a connecting device, the connecting device is a connecting sleeve 19, one end of the connecting sleeve 19 is connected with the second shaft 16 in an inserting mode in the bearing 18, a spring 20 is fixedly connected in the other end of the connecting sleeve 20, a connecting disc 21 is fixedly connected to the other end of the spring 20, a connecting block 22 is fixedly arranged at the front end of the connecting disc 21, two ends of the spring 20 are fixedly connected to the bottom end of the connecting sleeve 19 and the end face of the connecting disc 21 in a welding mode respectively, the second locating pieces 17 enter the shaft hole 7 through the guide grooves 8 in the working state, and then the bottom of the rotary groove 9 is rotated to be inserted into the fixing grooves 23 under the action of the spring 20.

Connecting block 22 is pegged graft in spread groove 6 under operating condition, and connecting block 22 is square piece, and the degree of depth of back degree and spread groove 6 equals and connecting block 22 plays the effect of fixed axle 4 and makes it can not take place to rotate under operating condition and realize being connected with the stable of runner 3.

Two guide ways 8 have been seted up respectively at the both ends in

shaft hole

7, 8 symmetry settings in guide ways, and the swivelling chute 9 has been seted up to the bottom of guide ways 8, and the fixed slot 23 has been seted up to shaft hole 7 wherein one end swivelling chute 9's bottom, it is steel ball 13 to be provided with antifriction device and antifriction device on the surface circumference of runner 3, steel ball 13 evenly distributed is on the surface of runner 3, and steel ball 13 pegs graft in steel ball groove 11, steel ball groove 11 is seted up in mounting groove 10, mounting groove 10 is seted up on runner 3, and the spliced eye 12 has been seted up at the both ends of mounting groove 10, it has covering device to peg graft in spliced eye 12.

The covering device is an elastic cover plate 14, the two ends of the elastic cover plate 14 are fixedly provided with inserting blocks, the inserting blocks are inserted into the inserting holes 12 in the working state, the elastic cover plate 14 is provided with matching holes 15, the steel balls 13 are inserted into the matching holes 15, the steel balls 13 penetrate through the matching holes 15 to be exposed outside the rotating wheel 3, the matching holes 15 are conical holes, and one end with a large diameter is located at the lower end of the elastic cover plate 14 and located inside the mounting groove 10.

The working principle is as follows: when the tappet 1 moves up and down under the action of the cam to open and close a valve, the steel balls 13 on the rotating wheel 3 are actually contacted with the cam, so that the direct contact between the tappet 1 and the cam is avoided, the sliding friction is changed into rolling friction due to the smooth surface of the steel balls 13 and the driving of the cam, the abrasion resistance of the tappet 1 is enhanced, the rotation of the cam is smoother, the service life of the whole device is longer, the steel balls 13 are inserted into the steel ball grooves 11 when the steel balls 13 are installed, then the elastic cover plate 14 is covered above the installation groove 10, the insertion blocks are inserted into the insertion holes 12 through elastic deformation, so that the fixation of the elastic cover plate 14 is realized, the steel balls 13 are fixed, the steel balls 13 are inserted into the groove matching holes 15, one part of the steel balls 13 is exposed outside the elastic cover plate 14 and higher than the surface of the rotating wheel 3 to realize the matching contact with the cam, at the moment, the rotating wheel 3 is assembled, the rotating wheel 3 is inserted into the rotating wheel groove 2 to enable the central line of the shaft hole 7 to be aligned with the central line of the through hole, then the first shaft 4 is inserted into the shaft hole 7 from one end of the through hole, the first positioning block 5 on the first shaft 4 is aligned with the guide groove 8 on the shaft hole 7 until being inserted into the bottom end of the guide groove 8, then the first shaft 4 is rotated to enable the first positioning block 5 to rotate to the bottom end of the rotating groove 9, then the second shaft 16 is inserted into the shaft hole 7 from the other end of the through hole, the second positioning block 17 is aligned with the guide groove 8 and then inserted into the guide groove 8 until the second positioning block 17 reaches the bottom end of the guide groove 8, at the moment, the spring 20 is in a compressed state, the connecting block 22 is inserted into the connecting groove 6, then the second shaft 16 is rotated to enable the second positioning block 17 to reach the bottom end of the rotating groove 9, and the second shaft 16 and the connecting sleeve 19 are connected through the bearing 18, so that the second shaft 16 and the connecting sleeve 19 can be rotated and the connecting sleeve 19 and the connecting disc 21 can be kept still, and the connecting disc 19 contacts with the end face of the first shaft 4, then the second shaft 16 can be loosened, the second positioning block 17 is ejected to the fixing groove 23 under the action of the spring 20, at the moment, the second shaft 16 is fixed, and the first shaft 4 is also fixed under the action of the connecting block 22 to be incapable of rotating due to the fact that the connecting block 22 is a square block, so that the first shaft 16 is prevented from falling off from the rotating wheel 3 accidentally in the working state, when the rotating wheel 3 needs to be replaced, the second positioning block 17 exits from the fixing groove 23 only by pressing the second shaft 16, then the second shaft 16 can be taken down at the position where the second positioning block 17 reaches the guide groove 8, and then the first shaft 4 is taken down by rotating the first shaft 4, so that the rotating wheel 3 and the rotating wheel groove 2 are disconnected and can be replaced conveniently and quickly.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a four-stroke gasoline engine wear-resisting tappet, includes tappet (1), its characterized in that: the tappet is characterized in that a rotating wheel groove (2) is formed in the lower end of the tappet (1), through holes are formed in two ends of the rotating wheel groove (2), a rotating wheel (3) is installed in the rotating wheel groove (2), a shaft hole (7) is formed in the rotating wheel (3), a fixing device is inserted into the shaft hole (7), two guide grooves (8) are formed in two ends of the shaft hole (7) respectively, the guide grooves (8) are symmetrically arranged, a rotating groove (9) is formed in the bottom end of each guide groove (8), a fixing groove (23) is formed in the bottom end of one end rotating groove (9) of each shaft hole (7), and an antifriction device is arranged on the circumference of the outer surface of the rotating wheel (3).

2. The wear resistant tappet of a four-stroke gasoline engine as defined in claim 1, wherein: the fixing device comprises a first shaft (4) and a second shaft (16), the first shaft (4) and the second shaft (16) penetrate through a shaft hole (7) in the rotating wheel (3) and are inserted into a through hole in the tappet (1), a connecting groove (6) is formed in one end of the first shaft, and two first positioning blocks (5) are fixedly arranged at one end of the connecting groove (6).

3. The wear resistant tappet for a four-stroke gasoline engine as defined in claim 2, wherein: two second locating blocks (17) are fixedly arranged at one end of the second shaft (16), a bearing hole is formed in one end of each second locating block (17), a bearing (18) is installed in each bearing hole, and the bearing (18) is matched with a connecting device.

4. The wear resistant tappet of a four-stroke gasoline engine as defined in claim 3, wherein: the connecting device is a connecting sleeve (19), one end of the connecting sleeve (19) is connected with the second shaft (16) in a bearing (18) in an inserting mode, a spring (20) is fixedly connected to the inner portion of the other end of the connecting sleeve, a connecting disc (21) is fixedly connected to the other end of the spring (20), and a connecting block (22) is fixedly arranged at the front end of the connecting disc (21).

5. The wear resistant tappet of a four-stroke gasoline engine as defined in claim 4, wherein: the connecting block (22) is inserted into the connecting groove (6) in the working state, the connecting block (22) is a square block, and the depth of the back degree is equal to that of the connecting groove (6).

6. The wear resistant tappet of a four-stroke gasoline engine as defined in claim 1, wherein: the antifriction device is steel ball (13), steel ball (13) evenly distributed is on the surface of runner (3), and steel ball (13) peg graft in steel ball groove (11), steel ball groove (11) are seted up in mounting groove (10), mounting groove (10) are seted up on runner (3), and the spliced eye (12) have been seted up at the both ends of mounting groove (10), it has the covering device to peg graft in spliced eye (12).

7. The wear resistant tappet of a four-stroke gasoline engine as defined in claim 6, wherein: the covering device is an elastic cover plate (14), the two ends of the elastic cover plate (14) are fixedly provided with inserting blocks, the inserting blocks are inserted into the inserting holes (12) only in the working state, the elastic cover plate (14) is provided with matching holes (15), and steel balls (13) are inserted into the matching holes (15).