Cylinder cover with noise reduction function

Abstract

The utility model discloses a cylinder head with a noise reduction function, which comprises a cylinder head and a cylinder head cover arranged on the cylinder head, the cylinder head is provided with a plurality of first threaded holes, the inner wall of each first threaded hole is provided with a fixing groove, the cylinder head cover is provided with a fastening assembly, and the fastening assembly is provided with a plurality of second threaded holes. The fastening assembly is provided with a telescopic fixing block and abuts against the fixing groove, and a noise reduction assembly is arranged between the head of the fastening assembly and the cylinder head cover. The fixing block abuts against the fixing groove, the spring gasket enables the fixing block to abut against the end face of the fixing groove firmly, and therefore the problem that the fastening assembly is loosened from the first threaded hole due to resonance is solved, the spring gasket, the flat gasket and the cylinder head cover are prevented from colliding and generating noise through the noise reduction assembly, and the service life of the cylinder head cover is prolonged. And the product has the advantages of noise reduction function and stable connection.

Description

Technical Field

[0001] The utility model relates to the technical field of cylinder heads, in particular to a cylinder head with a noise reduction function. Background Art

[0002] The cylinder head cover is a cover that covers the engine block. The first and most basic function is to cover and seal the cylinder head, keeping the oil inside while isolating contaminants such as dirt and moisture from the outside. The second function of the cylinder head cover is to isolate the oil from the air.

[0003] Regarding the installation of the cylinder head cover, the traditional installation structure is to place a sealing gasket between the cylinder head and the cylinder head cover, and then use bolts to tighten them to achieve the purpose of fixed connection and sealing. This connection structure is a rigid connection. When the engine is operating normally, the vibration of the engine will be transmitted to the cylinder head cover through the cylinder head, causing the thin-walled surface of the cylinder head cover to vibrate, thereby loosening the bolts. The resonance will cause the bolts to move up and down, causing the gasket to collide with the cylinder head cover and produce abnormal noise. Therefore, the applicant has made a useful design and found a solution to the above-mentioned problem. The technical solution to be introduced below is produced in this context. Summary of the invention

[0004] The purpose of the utility model is to overcome the shortcomings of the above-mentioned background technology design and provide a product with noise reduction function and stable connection.

[0005] To solve the above problems, the utility model adopts the following technical solutions.

[0006] A cylinder head with a noise reduction function comprises a cylinder head and a cylinder head cover arranged on the cylinder head, the cylinder head is provided with a plurality of first threaded holes, the inner walls of the first threaded holes are provided with fixing grooves, the cylinder head cover is provided with a fastening component and is engaged with the first threaded holes, the fastening component is provided with a retractable fixing block and abuts against the fixing grooves, and a noise reduction component is provided between the head of the fastening component and the cylinder head cover.

[0007] Preferably, a cylinder gasket is provided between the cylinder head and the cylinder head cover.

[0008] Preferably, the fastening assembly includes a screw, a nut, a threaded base, a first spring, and a second spring. The screw is provided with a blind hole. The inner wall of the blind hole is provided with a plurality of first countersunk holes and avoidance through holes evenly distributed with the dot as the axis. The first countersunk holes are arranged at equal intervals from top to bottom. Guide groove plates are provided on both sides of the first countersunk holes. The guide groove plates are provided with a first limit plate. The end surface of the blind hole is provided with a plurality of avoidance grooves evenly distributed with the dot as the axis. A second threaded hole is provided at the bottom of the blind hole. The nut is provided with a protrusion corresponding to the avoidance groove, and is inserted in the avoidance groove, and is connected and fixed to the screw by welding.

[0009] Preferably, the fixed block is arranged in the yielding through hole, the fixed block is provided with an inclined portion, the inclined portion is provided with a guide plate, and is slidably arranged on the guide groove plate, second limit plates are provided on both sides of the guide plate, and abut against the end surface of the guide groove plate, the guide plate is provided with a second countersunk hole, the first spring abuts against the first countersunk hole and the second countersunk hole, so that the guide plate abuts against the first limit plate.

[0010] Preferably, the threaded base is provided with a push rod, the push rod is provided with a threaded groove and engages with the second threaded hole, the end face of the push rod is provided with a tapered cylinder and abuts against any one of the inclined portion and the guide plate, and the second spring abuts against the blind hole and the tapered cylinder.

[0011] Preferably, the noise reduction assembly includes a spring washer, a flat washer, a rubber vibration-damping washer, and a thermal insulation washer. The spring washer, flat washer, rubber vibration-damping washer, and thermal insulation washer pass through the threaded base and the screw rod in sequence and abut against the nut. The thermal insulation washer abuts against the cylinder head cover.

[0012] Beneficial effects:

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] The utility model uses a fixing block to abut against a fixing groove, and a spring gasket to enable the fixing block to firmly abut against the end face of the fixing groove, thereby preventing the fastening component from loosening with the first threaded hole due to resonance, and using a noise reduction component to prevent the spring gasket, the flat gasket and the cylinder head cover from colliding and generating noise, so that the product has the advantages of noise reduction function and stable connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the side cross-sectional structure of a cylinder head with noise reduction function according to the utility model;

[0016] Figure 2 For this utility model Figure 1 A partial structure enlarged view of detail A of a cylinder head with noise reduction function;

[0017] Figure 3 It is a schematic diagram of the side cross-sectional structure of a fastening assembly of a cylinder head with a noise reduction function according to the utility model;

[0018] Figure 4 The utility model is an explosion-proof device for a cylinder head with noise reduction function. Figure 1 ;

[0019] Figure 5 The utility model is an explosion-proof device for a cylinder head with noise reduction function. Figure 1 ;

[0020] Figure 6 It is a schematic diagram of the side cross-sectional structure of a screw rod of a cylinder head with noise reduction function according to the utility model;

[0021] The corresponding relationship between the illustrations and component names in the figure is as follows:

[0022] Reference numerals: 1. cylinder head; 2. cylinder head cover; 3. fastening assembly; 4. fixing block; 5. noise reduction assembly; 7. cylinder gasket;

[0023] 11. first threaded hole; 12. fixing groove;

[0024] 31. Screw rod; 32. Nut; 33. Threaded base; 34. First spring; 35. Second spring;

[0025] 311, blind hole; 312, first countersunk hole; 313, clearance through hole; 314, guide plate; 315, first limit plate; 316, clearance groove; 317, second threaded hole;

[0026] 321, bump;

[0027] 331, ejector pin; 332, threaded groove; 333, tapered cylinder;

[0028] 41; inclined portion; 42, guide plate; 43, second limit plate; 44, second countersunk hole;

[0029] 51. Spring washer; 52. Flat washer; 53. Rubber vibration damping washer; 54. Thermal insulation washer. DETAILED DESCRIPTION

[0030] The technical solution of the utility model will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by the terms "up", "down", "left" and "right" are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0032] Reference example Figures 1 to 6A cylinder head with noise reduction function, comprising a cylinder head 1 and a cylinder head cover 2 arranged on the cylinder head 1, the cylinder head 1 is provided with a plurality of first threaded holes 11, the inner wall of the first threaded hole 11 is provided with a fixing groove 12, the cylinder head cover 2 is provided with a fastening component 3 and is fitted into the first threaded hole 11, the fastening component 3 is provided with a retractable fixing block 4 and abuts against the fixing groove 12, and a noise reduction component 5 is provided between the head of the fastening component 3 and the cylinder head cover 2;

[0033] It is worth mentioning that a cylinder gasket 7 is provided between the cylinder head 1 and the cylinder head cover 2, and the cylinder gasket 7 forms a seal at the connection between the cylinder head 1 and the cylinder head cover 2;

[0034] It is worth mentioning that the fastening assembly 3 includes a screw rod 31, a nut 32, a threaded base 33, a first spring 34, and a second spring 35. The screw rod 31 is provided with a blind hole 311. The inner wall of the blind hole 311 is evenly distributed with a plurality of first countersunk holes 312 and a clearance through hole 313 with the dot as the axis. The first countersunk holes 312 are arranged at equal intervals from top to bottom. Guide groove plates 314 are provided on both sides of the first countersunk holes 312. The guide groove plates 314 are provided with a first limiting plate 315. The end surface of the blind hole 311 is evenly distributed with a plurality of avoidance grooves 316 with the dot as the axis. The bottom of the blind hole 311 is provided with a second threaded hole 317. The nut 32 is provided with a corresponding avoidance groove. The convex block 321 of the groove 316 is inserted in the avoidance groove 316 and connected and fixed with the screw rod 31 by welding. The blind hole 311 provides accommodation space for the fixed block 4, the first spring 34, the second spring 35, the tapered cylinder 333 and other parts. The first countersunk hole 312 increases the accommodation space of the first spring 34. The yielding through hole 313 provides convenience for the extension or retraction of the fixed block 4. The guide groove plate 314 provides a guiding function for the guide plate 42. The first limit plate 315 limits the distance of the fixed block 4 retracting the yielding through hole 313. When the nut 32 rotates, the avoidance groove 316 bears the force from the convex block 321 to ensure the stability of the welding place.

[0035] It is worth mentioning that the fixed block 4 is arranged in the yielding through hole 313, the fixed block 4 is provided with an inclined portion 41, the inclined portion 41 is provided with a guide plate 42, and is slidably arranged on the guide groove plate 314, and second limiting plates 43 are provided on both sides of the guide plate 42, and abut against the end surface of the guide groove plate 314, the guide plate 42 is provided with a second countersunk hole 44, the first spring 34 abuts against the first countersunk hole 312 and the second countersunk hole 44, so that the guide plate 42 abuts against the first limiting plate 315, the inclined portion 41 is used in conjunction with the conical cylinder 333, and the elastic force of the first spring 34 is transmitted to the fixed block 4 through the guide plate 42, the second limiting plate 43 not only limits the distance that the fixed block 4 extends out of the yielding through hole 313, but also ensures that the guide plate 42 slides and moves in the guide groove plate 314, and the second countersunk hole 44 increases the accommodating space of the first spring 34;

[0036] It is worth mentioning that the threaded base 33 is provided with a push rod 331, the push rod 331 is provided with a thread groove 332, and is engaged with the second threaded hole 317, the end face of the push rod 331 is provided with a tapered cylinder 333, and abuts against any one of the inclined portion 41 and the guide plate 42, the second spring 35 abuts against the blind hole 311 and the tapered cylinder 333, the push rod 331 is used in conjunction with the tapered cylinder 333, the tapered cylinder 333 pushes the fixing block 4 to extend, and the second spring 35 applies a force to the tapered cylinder 333, so that the push rod 331 rotates with resistance, thereby ensuring that the threaded base 33 is tightened first The first threaded hole 11 is tightened first and abuts against the bottom of the first threaded hole 11;

[0037] It is worth mentioning that the noise reduction component 5 includes a spring washer 51, a flat washer 52, a rubber vibration-damping washer 53, and a heat-insulating washer 54. The spring washer 51, the flat washer 52, the rubber vibration-damping washer 53, and the heat-insulating washer 54 pass through the threaded base 33 and the screw 31 in sequence and abut against the nut 32. The heat-insulating washer 54 abuts against the cylinder head cover 2. When the spring washer 51 is compressed by the nut 32, a continuous elastic force is generated for the nut 32, so that the fixing block 4 is tightly attached to the end surface of the fixing groove 12, and the screw 31 is pressed against the cylinder head cover 2. 1. The thread of the threaded base 33 and the first thread groove 332 are connected to maintain a certain friction force, thereby generating a resistance torque. The flat gasket 52 increases the contact area with the spring gasket 51 to prevent the spring gasket 51 from damaging the rubber vibration-damping gasket 53 when rotating. The rubber vibration-damping gasket 53 not only plays a vibration-damping role, but also prevents the flat gasket 52 and the cylinder head cover 2 from colliding with each other and generating noise. The heat-insulating gasket 54 is made of heat-insulating cotton as a raw material to prevent the high temperature generated by the cylinder head cover 2 from melting the rubber vibration-damping gasket 53.

[0038] The use principle of the utility model is now described as follows:

[0039] The screw rod 31 and the threaded base 33 pass through the spring washer 51, the flat washer 52, the rubber vibration-damping washer 53 and the heat-insulating washer 54 in sequence, and the threaded base 33 is aligned with the entrance of the first threaded hole 11. The nut 32 is rotated. Since the second spring 35 applies a force to the tapered cylinder 333, the push rod 331 does not rotate at this time, thereby preventing the fixing block 4 from extending at this time, and urging the threaded base 33 to gradually sink. The screw rod 31 follows closely and enters the first threaded hole 11 until the threaded base 33 abuts against the bottom of the first threaded hole 11. The nut 32 continues to be rotated. As the distance between the nut 32 and the cylinder head cover 2 gradually shortens, the tapered cylinder 333 moves upward and abuts against the inclined Part 41 gradually pushes the guide plate 42 to move in the direction of the first counterbore 312, and stores energy in the first spring 34 until the end face of the screw rod 31 abuts against the end face of the threaded base 33. At this time, the second limit block abuts against the inner wall of the blind hole 311, and the tapered cylinder 333 enters the guide plate 42 from the inclined part 41. The fixed block 4 extends out of the through hole 313 and abuts against the fixed groove 12. At this time, there is still a little distance between the end face of the fixed block 4 and the end face of the fixed groove 12. This is to provide some margin for the mutual cooperation design of the two components. Through the elastic force of the spring gasket 51, the fixed block 4 is tightly abutted against the end face of the fixed groove 12, thereby completing the connection and fixation of the cylinder head 1 and the cylinder head cover 2.

[0040] The above design scheme can enable the product to achieve the advantages of noise reduction and stable connection.

[0041] The above content is a further detailed description of the utility model in combination with specific implementation methods. It cannot be determined that the specific implementation of the utility model is limited to these descriptions. For ordinary technicians in the technical field to which the utility model belongs, without departing from the concept of the utility model, they can also make several simple deductions or substitutions, which should be regarded as belonging to the scope of protection determined by the claims submitted for the utility model.

Claims

1. A cylinder head with noise reduction function, comprising a cylinder head (1) and a cylinder head cover (2) arranged on the cylinder head (1), wherein the cylinder head (1) is provided with a plurality of first threaded holes (11), characterized in that: The inner wall of the first threaded hole (11) is provided with a fixing groove (12); the cylinder head cover (2) is provided with a fastening assembly (3) which engages with the first threaded hole (11); the fastening assembly (3) is provided with a retractable fixing block (4) which abuts against the fixing groove (12); and a noise reduction assembly (5) is provided between the head of the fastening assembly (3) and the cylinder head cover (2).

2. The cylinder head with noise reduction function according to claim 1, characterized in that: A cylinder gasket (7) is provided between the cylinder head (1) and the cylinder head cover (2).

3. The cylinder head with noise reduction function according to claim 1, characterized in that: The fastening assembly (3) comprises a screw rod (31), a nut (32), a threaded base (33), a first spring (34), and a second spring (35). The screw rod (31) is provided with a blind hole (311). The inner wall of the blind hole (311) is evenly distributed with a circle as the axis and a plurality of first countersunk holes (312) and clearance holes (313). The first countersunk holes (312) are arranged at equal intervals from top to bottom. The first countersunk holes (312) are provided on both sides with A guide groove plate (314), wherein the guide groove plate (314) is provided with a first limit plate (315), the end surface of the blind hole (311) is evenly distributed with a plurality of avoidance grooves (316) with a round point as the axis, the bottom of the blind hole (311) is provided with a second threaded hole (317), and the nut (32) is provided with a protrusion (321) corresponding to the avoidance groove (316), and is inserted into the avoidance groove (316), and is connected and fixed to the screw rod (31) by welding.

4. The cylinder head with noise reduction function according to claim 3, characterized in that: The fixed block (4) is arranged in the clearance through hole (313), the fixed block (4) is provided with an inclined portion (41), the inclined portion (41) is provided with a guide plate (42) and is slidably arranged on the guide groove plate (314), second limit plates (43) are provided on both sides of the guide plate (42) and abut against the end surface of the guide groove plate (314), the guide plate (42) is provided with a second countersunk hole (44), the first spring (34) abuts against the first countersunk hole (312) and the second countersunk hole (44), so that the guide plate (42) abuts against the first limit plate (315).

5. The cylinder head with noise reduction function according to claim 3, characterized in that: The threaded base (33) is provided with a push rod (331), the push rod (331) is provided with a thread groove (332) and is engaged with the second threaded hole (317), the end surface of the push rod (331) is provided with a tapered cylinder (333) and abuts against any one of the inclined portion (41) and the guide plate (42), and the second spring (35) abuts against the blind hole (311) and the tapered cylinder (333).

6. The cylinder head with noise reduction function according to claim 4, characterized in that: The noise reduction component (5) comprises a spring washer (51), a flat washer (52), a rubber vibration-damping washer (53), and a heat-insulating washer (54); the spring washer (51), the flat washer (52), the rubber vibration-damping washer (53), and the heat-insulating washer (54) pass through the threaded base (33) and the screw rod (31) in sequence and abut against the nut (32); the heat-insulating washer (54) abuts against the cylinder head cover (2).

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