CN220815775U

CN220815775U - Camshaft convenient to change maintenance

Info

Publication number: CN220815775U
Application number: CN202322785747.XU
Authority: CN
Inventors: 蔡国武
Original assignee: Zhejiang Yingwu Industry And Trade Co ltd
Current assignee: Zhejiang Yingwu Industry And Trade Co ltd
Priority date: 2023-10-17
Filing date: 2023-10-17
Publication date: 2024-04-19
Anticipated expiration: 2033-10-17

Abstract

The utility model discloses a camshaft convenient to replace and maintain, and relates to the technical field of camshafts. This camshaft convenient to change maintenance, including the axis of rotation, axis of rotation right side outer wall contact has fixed cylinder, fixed cylinder right side outer wall rotates and is connected with the rotation circle piece, rotate circle piece left side outer wall fixedly connected with screw thread post, fixed cylinder left side outer wall fixedly connected with spacing post, spacing hole has been seted up to axis of rotation right side outer wall, threaded hole has been seted up to axis of rotation right side outer wall, axis of rotation side outer wall sliding connection has the cam piece. When the camshaft convenient to change and maintain is used, the rotary round block is rotated to detach the fixed cylinder, and then the fixed bolt is rotated to enable the connecting block to be separated from the rotary shaft, so that the damaged cam block is detached, and therefore, the single cam block can be conveniently maintained and replaced without integral replacement, the maintenance efficiency is improved, and the waste is reduced.

Description

Camshaft convenient to change maintenance

Technical Field

The utility model relates to the technical field of camshafts, in particular to a camshaft convenient to replace and maintain.

Background

The camshaft is a component in a piston engine that functions to control the opening and closing actions of the valves. The working principle is as follows: by changing the curve of the cam shaft, the valve opening and closing time can be accurately adjusted. When the cam shaft fails, the automobile has symptoms of unstable idling, weak acceleration and sudden flameout.

The current camshaft is usually directly fixed on the cam axle seat of engine, and incessantly rub with the valve, long-time operation, and the epaxial cam piece of camshaft takes place wearing and tearing easily, leads to the valve motion stroke to be too little, causes the insufficient or jar of admitting air to press excessively high, needs to change the maintenance to the camshaft this moment, but the axis of rotation and the cam piece of camshaft are integrated into one piece usually, and it is comparatively inconvenient to maintain a certain piece independent camshaft, if need whole change, comparatively extravagant again. On the other hand, when the camshaft works, the surface of the cam block needs to be lubricated, the prior art is generally provided with an oil nozzle for intermittently spraying lubricating oil to the cam block, but the injection quantity and the injection angle of the oil nozzle are extremely high, meanwhile, the oil nozzle which is independently arranged can enlarge the internal structure of the engine, the weight of the engine is improved, the failure rate of complex mechanical parts can be improved, and the current trend of light weight of an automobile is not met.

Disclosure of utility model

(One) solving the technical problems

Aiming at the defects of the prior art, the utility model provides the camshaft convenient to replace and maintain, solves the problems that the cam block and the rotating shaft are integrally formed, the maintenance and the replacement of the independent cam block are troublesome, and the camshaft needs to be provided with an additional oil nozzle to lubricate the camshaft during working, so that the engine is complex in structure and easy to break down, the weight of the engine is increased and the like.

(II) technical scheme

In order to achieve the above purpose, the utility model is realized by the following technical scheme: the utility model provides a camshaft convenient to change maintenance, includes the axis of rotation, axis of rotation right side outer wall contact has fixed cylinder, fixed cylinder right side outer wall rotates and is connected with the rotation circle piece, rotate circle piece left side outer wall fixedly connected with screw thread post, fixed cylinder left side outer wall fixedly connected with spacing post, spacing hole has been seted up to axis of rotation right side outer wall, the screw hole has been seted up to axis of rotation right side outer wall, axis of rotation side outer wall sliding connection has the cam block, cam block right side outer wall fixedly connected with connecting block, the slip circular slot has been seted up to connecting block side inner wall, slip circular slot bottom outer wall has spacing fixture block through spacing spring elastic connection, connecting block side inner wall threaded connection fixing bolt, spacing draw-in groove has been seted up to axis of rotation side outer wall, the bolt hole has been seted up to axis of rotation side outer wall.

Preferably, the oil inlet is formed in the left outer wall of the rotating shaft, an inner cavity is formed in the inner wall of the side face of the rotating shaft, an oil hole is formed in the outer wall of the top face of the rotating shaft, an oil hole is formed in the inner wall of the cam block, a limiting round groove is formed in the inner wall of the cam block, a pushing plate is elastically connected to the inner wall of the bottom end of the limiting round groove through a reset spring, and a round bead is fixedly connected to the outer wall of the top end of the pushing plate.

Preferably, the outer wall of the side face of the threaded column is rotationally connected to the inner wall of the side face of the fixed cylinder, the outer wall of the side face of the limit column is clamped on the inner wall of the side face of the limit hole, and the outer wall of the side face of the threaded column is in threaded connection with the inner wall of the side face of the threaded hole.

Preferably, the connecting block side inner wall slides on the rotating shaft side outer wall.

Preferably, one end of the limiting spring is fixedly connected to the outer wall of the bottom surface of the connecting block, and the other end of the limiting spring is fixedly connected to the outer wall of the bottom end of the limiting clamping block.

Preferably, the side outer wall of the limit clamping block is clamped on the side inner wall of the limit clamping groove, and the side outer wall of the fixing bolt is clamped on the side inner wall of the bolt hole.

Preferably, the right side of the oil inlet hole is communicated with the left side of the inner cavity, the top end of the inner cavity is communicated with the bottom end of the shaft oil hole, and the top end of the shaft oil hole is communicated with the bottom end of the cam oil hole.

Preferably, one end of the reset spring is fixedly connected to the outer wall of the bottom end of the limiting circular groove, and the other end of the reset spring is fixedly connected to the outer wall of the bottom end of the push plate.

Preferably, the outer wall of the top surface of the ball is contacted with the inner wall of the top surface of the cam oil hole.

(III) beneficial effects

The utility model provides a camshaft which is convenient to replace and maintain. The beneficial effects are as follows:

(1) When the camshaft convenient to replace and repair is used, the rotary round block is rotated to detach the fixed cylinder, and then the fixed bolt is rotated to separate the connecting block from the rotary shaft, so that the damaged cam block is detached, and the single cam block can be conveniently repaired and replaced without integral replacement, thereby improving the maintenance efficiency and reducing the waste.

(2) When the camshaft convenient to replace and maintain is used, through the arrangement of the cavity and the oil inlet, lubricating oil is stored in the rotating shaft, and the valve extrudes the ball, so that part of lubricating oil overflows when the cam block rotates once, the cam block is lubricated, the surface of the cam block can be lubricated without using an oil nozzle, the structure is simplified, the weight of an engine is reduced, and the failure rate is reduced.

Drawings

FIG. 1 is a schematic view of the overall front perspective structure of the present utility model;

FIG. 2 is a schematic view of the left side three-dimensional structure of the fixed ball of the present utility model;

FIG. 3 is a schematic view of a right side cross-sectional perspective structure of the connecting block of the present utility model;

FIG. 4 is a schematic view of a perspective view with a partial section of the right side of the rotating shaft according to the present utility model;

Fig. 5 is a schematic view of a right side cross-sectional perspective structure of a cam block according to the present utility model.

In the figure: 1. a rotating shaft; 2. a fixed cylinder; 3. rotating the round block; 4. a threaded column; 5. a limit column; 6. a limiting hole; 7. a threaded hole; 8. a cam block; 9. a connecting block; 10. sliding round grooves; 11. a limit spring; 12. a limit clamping block; 13. a fixing bolt; 14. a limit clamping groove; 15. bolt holes; 16. an oil inlet hole; 17. an inner cavity; 18. a shaft oil hole; 19. a cam oil hole; 20. limiting round grooves; 21. a return spring; 22. a push plate; 23. and (5) a ball.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1-5, the utility model provides a cam shaft convenient for replacement and maintenance, which comprises a rotating shaft 1 for fixing a cam block 8, wherein the outer wall of the right side of the rotating shaft 1 is contacted with a fixed cylinder 2 for fixing the cam shaft on a cam shaft seat, the outer wall of the right side of the fixed cylinder 2 is rotationally connected with a rotating round block 3, the outer wall of the left side of the rotating round block 3 is fixedly connected with a threaded column 4, the outer wall of the side of the threaded column 4 is rotationally connected with the inner wall of the side of the fixed cylinder 2, the rotating round block 3 rotates to enable the threaded column 4 to rotate, the outer wall of the left side of the fixed cylinder 2 is fixedly connected with a limiting column 5, the limiting column 5 is provided with four groups, the annular average distribution is arranged on the fixed cylinder 2, the outer wall of the right side of the rotating shaft 1 is provided with a limiting hole 6, the outer wall of the side of the limiting column 5 is clamped on the inner wall of the side of the limiting hole 6, the limiting column 5 and the limiting hole 6 limit the fixed cylinder 2 and the rotating shaft 1 keep relative static, the outer wall of the right side of the rotating shaft 1 is provided with a threaded hole 7, the outer wall of the side surface of a threaded column 4 is in threaded connection with the inner wall of the side surface of the threaded hole 7, so that a fixed cylinder 2 is fixed with the rotating shaft 1, the outer wall of the side surface of the rotating shaft 1 is in sliding connection with a cam block 8, the cam block 8 is formed by connecting two round blocks which are larger than one another and smaller than one another, tangents at two ends of the cam block 8 are connected, the circle center of the larger round block is concentric with the rotating shaft 1, the outer wall of the right side of the cam block 8 is fixedly connected with a connecting block 9, the cam blocks 8 are provided with four groups and evenly distributed on the rotating shaft 1 at the same interval, each group of cam blocks 8 is provided with two blocks and symmetrically distributed on two sides of the connecting block 9 and fixedly connected with the connecting block 9, the inner wall of the side surface of the connecting block 9 slides on the outer wall of the side surface of the rotating shaft 1, the inner wall of the side surface of the connecting block 9 is provided with a sliding round groove 10, the outer wall at the bottom of the sliding round groove 10 is elastically connected with a limiting clamping block 12 through a limiting spring 11, the limit clamping blocks 12 are semicircular, two groups of limit clamping blocks are arranged, the limit clamping blocks are symmetrically distributed on the upper side and the lower side of the sliding circular groove 10, the side walls of the left side and the right side of the limit clamping blocks 12 are inclined planes, the inclined planes can partially convert left or right force into upward or downward force, one end of each limit spring 11 is fixedly connected to the outer wall of the bottom surface of each connecting block 9, the other end of each limit spring 11 is fixedly connected to the outer wall of the bottom end of each limit clamping block 12, when the limit clamping blocks 12 are not stressed, each limit spring 11 pushes each limit clamping block 12 to move outwards, three groups of limit springs 11 are evenly distributed on the outer wall of the bottom end of each limit clamping block 12, the side inner wall of each connecting block 9 is in threaded connection with a fixing bolt 13, the side outer wall of each rotating shaft 1 is provided with a limit clamping groove 14, the side outer wall of each limit clamping block 12 is clamped on the side inner wall of each limit clamping groove 14, the connecting block 9 is located at a designated position on the rotating shaft 1, accordingly the cam block 8 corresponds to the valve position, the side outer wall of each rotating shaft 1 is provided with a bolt hole 15, and the side outer wall of each fixing bolt 13 is clamped on the side inner wall of each bolt hole 15, so that the cam block 8 is fixed on the rotating shaft 1.

Further, the left outer wall of the rotating shaft 1 is provided with an oil inlet hole 16 for enabling lubricating oil to enter an inner cavity 17 of the rotating shaft 1, the inner wall of the side surface of the rotating shaft 1 is provided with an inner cavity 17, the inner cavity 17 not only can enable the rotating shaft 1 to bear lubricating oil, but also can lighten the weight of a cam shaft, the outer wall of the top surface of the rotating shaft 1 is provided with shaft oil holes 18 in accordance with the light weight trend of an automobile, the shaft oil holes 18 are provided with four groups, two groups are respectively corresponding to the position of the cam block 8, the inner wall of the cam block 8 is provided with cam oil holes 19, the right side of the oil inlet hole 16 is communicated with the left side of the inner cavity 17, the top end of the inner cavity 17 is communicated with the bottom end of the shaft oil hole 18, the top end of the shaft oil hole 18 is communicated with the bottom end of the cam oil hole 19, and when lubricating oil enters the inner cavity 17 from the oil inlet hole 16, the lubricating oil enters the cam hole 19 along the shaft oil hole 18, the limiting round groove 20 is formed in the inner wall of the cam block 8, the push plate 22 is elastically connected to the inner wall of the bottom end of the limiting round groove 20 through the reset spring 21, when the push plate 22 is not subjected to external force, the reset spring 21 pushes the push plate 22 upwards, four groups of rectangular holes are formed in the push plate 22, lubricating oil can pass through the rectangular holes, one end of the reset spring 21 is fixedly connected to the outer wall of the bottom end of the limiting round groove 20, the other end of the reset spring 21 is fixedly connected to the outer wall of the bottom end of the push plate 22, the ball 23 is fixedly connected to the ball 23, the outer wall of the top surface of the ball 23 is contacted with the inner wall of the top surface of the cam oil hole 19, the diameter of the ball 23 is slightly smaller than the diameter of the cam oil hole 19, but the top end of the cam oil hole 19 is narrowed, the ball 23 cannot leave from the cam oil hole 19, and meanwhile, the ball 23 has a part of spherical surface protruding out of the cam oil hole 19.

In the utility model, when the cam block 8 is used, the damaged cam block 8 is required to be conveniently replaced, the rotary round block 3 is firstly rotated, the rotary round block 3 drives the threaded column 4, the threaded column 4 moves rightwards in the threaded hole 7, the threaded column 4 drives the fixed column 2 to move rightwards, the fixed column 2 is removed from the rotary shaft 1, the fixed bolt 13 is rotated to enable the fixed bolt 13 to move outwards, the fixed bolt 13 is separated from the bolt hole 15, the cam block 8 is then moved rightwards, the cam block 8 drives the connecting block 9 to move rightwards, the connecting block 9 drives the limiting clamping block 12 to move rightwards, the inclined surface on the right side of the limiting clamping block 12 converts the leftwards force of the limiting clamping block 12 into the upwards or downwards force, so that the limiting clamping block 12 is retracted into the sliding round groove 10 to be separated from the limiting clamping groove 14, the rightwards moving connecting block 9 can be separated from the rotary shaft 1, and the damaged cam block 8 is fixedly replaced. When the purpose of lubricating the cam block 8 can be achieved without using an oil nozzle, lubricating oil is injected from the oil inlet hole 16, the lubricating oil enters the inner cavity 17 through the oil inlet hole 16 and then enters the cam oil hole 19 through the shaft oil hole 18, when the automobile starts, the engine drives the rotating shaft 1 to rotate, the rotating shaft 1 drives the cam block 8 to rotate, one convex side of the cam block 8 rotates to the lower side, the valve contacts with the valve, the valve upwards presses the ball 23, the ball 23 upwards slides on the inner wall of the cam oil hole 19, meanwhile, the push plate 22 is driven to upwards slide in the limit round groove 20, the push plate 22 upwards moves under the action of the reset spring 21, so that the outer wall of the bottom surface of the ball 23 is separated from the inner wall of the bottom end of the cam oil hole 19, lubricating oil overflows from the cam oil hole 19 and is smeared on the contact surface of the cam block 8 and the valve, a small amount of lubricating oil is smeared on the outer surface of the cam block 8 every time, and the oil nozzle is not required to be used, and the cam block 8 is lubricated a small amount of times.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein 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. Camshaft convenient to change maintenance, including axis of rotation (1), its characterized in that: the utility model discloses a fixed cylinder (2) is connected with in contact of axis of rotation (1) right side outer wall, fixed cylinder (2) right side outer wall rotates and is connected with rotates rotary knob (3), rotate rotary knob (3) left side outer wall fixedly connected with screw thread post (4), fixed cylinder (2) left side outer wall fixedly connected with spacing post (5), spacing hole (6) have been seted up to axis of rotation (1) right side outer wall, screw hole (7) have been seted up to axis of rotation (1) right side outer wall, axis of rotation (1) side outer wall sliding connection has cam piece (8), cam piece (8) right side outer wall fixedly connected with connecting block (9), slide knob (10) have been seted up to connecting block (9) side inner wall, slide knob (10) bottom outer wall is through spacing spring (11) elastic connection spacing fixture block (12), connecting block (9) side inner wall screw thread connection fixing bolt (13), spacing draw-in groove (14) have been seted up to axis of rotation (1) side outer wall, bolt hole (15) have been seted up to axis of rotation (1) side outer wall.

2. A camshaft for facilitating replacement and repair according to claim 1, wherein: oil inlet (16) have been seted up to axis of rotation (1) left side outer wall, inner chamber (17) have been seted up to axis of rotation (1) side inner wall, axis of rotation (1) top surface outer wall has been seted up axle oilhole (18), cam oilhole (19) have been seted up to cam piece (8) inner wall, spacing circular slot (20) bottom inner wall has push pedal (22) through reset spring (21) elastic connection, push pedal (22) top outer wall fixedly connected with ball (23).

3. A camshaft for facilitating replacement and repair according to claim 1, wherein: the side outer wall of the threaded column (4) is rotationally connected to the side inner wall of the fixed cylinder (2), the side outer wall of the limit column (5) is clamped on the side inner wall of the limit hole (6), and the side outer wall of the threaded column (4) is in threaded connection with the side inner wall of the threaded hole (7).

4. A camshaft for facilitating replacement and repair according to claim 1, wherein: the side inner wall of the connecting block (9) slides on the side outer wall of the rotating shaft (1).

5. A camshaft for facilitating replacement and repair according to claim 1, wherein: one end of the limiting spring (11) is fixedly connected to the outer wall of the bottom surface of the connecting block (9), and the other end of the limiting spring (11) is fixedly connected to the outer wall of the bottom end of the limiting clamping block (12).

6. A camshaft for facilitating replacement and repair according to claim 1, wherein: the side outer wall of the limit clamping block (12) is clamped on the side inner wall of the limit clamping groove (14), and the side outer wall of the fixing bolt (13) is clamped on the side inner wall of the bolt hole (15).

7. A camshaft for facilitating replacement and repair according to claim 2, wherein: the right side of the oil inlet hole (16) is communicated with the left side of the inner cavity (17), the top end of the inner cavity (17) is communicated with the bottom end of the shaft oil hole (18), and the top end of the shaft oil hole (18) is communicated with the bottom end of the cam oil hole (19).

8. A camshaft for facilitating replacement and repair according to claim 2, wherein: one end of the reset spring (21) is fixedly connected to the outer wall of the bottom end of the limiting circular groove (20), and the other end of the reset spring (21) is fixedly connected to the outer wall of the bottom end of the push plate (22).

9. A camshaft for facilitating replacement and repair according to claim 2, wherein: the outer wall of the top surface of the ball (23) is contacted with the inner wall of the top surface of the cam oil hole (19).